``CAP_LAST_CAP`` from the kernel.
+.. _core_pattern:
+
core_pattern
============
%f executable filename
%E executable path
%c maximum size of core file by resource limit RLIMIT_CORE
+ %C CPU the task ran on
%<OTHER> both are dropped
======== ==========================================
an oops event is detected.
+ oops_limit
+ ==========
+
+ Number of kernel oopses after which the kernel should panic when
+ ``panic_on_oops`` is not set. Setting this to 0 disables checking
+ the count. Setting this to 1 has the same effect as setting
+ ``panic_on_oops=1``. The default value is 10000.
+
+
osrelease, ostype & version
===========================
watchdog — if enabled — can detect a hard lockup condition.
+split_lock_mitigate (x86 only)
+==============================
+
+On x86, each "split lock" imposes a system-wide performance penalty. On larger
+systems, large numbers of split locks from unprivileged users can result in
+denials of service to well-behaved and potentially more important users.
+
+The kernel mitigates these bad users by detecting split locks and imposing
+penalties: forcing them to wait and only allowing one core to execute split
+locks at a time.
+
+These mitigations can make those bad applications unbearably slow. Setting
+split_lock_mitigate=0 may restore some application performance, but will also
+increase system exposure to denial of service attacks from split lock users.
+
+= ===================================================================
+0 Disable the mitigation mode - just warns the split lock on kernel log
+ and exposes the system to denials of service from the split lockers.
+1 Enable the mitigation mode (this is the default) - penalizes the split
+ lockers with intentional performance degradation.
+= ===================================================================
+
+
stack_erasing
=============
2 Unprivileged calls to ``bpf()`` are disabled
= =============================================================
+
+ warn_limit
+ ==========
+
+ Number of kernel warnings after which the kernel should panic when
+ ``panic_on_warn`` is not set. Setting this to 0 disables checking
+ the warning count. Setting this to 1 has the same effect as setting
+ ``panic_on_warn=1``. The default value is 0.
+
+
watchdog
========
String Manipulation
-------------------
+ .. kernel-doc:: include/linux/fortify-string.h
+ :internal:
+
.. kernel-doc:: lib/string.c
:export:
.. kernel-doc:: include/linux/math64.h
:internal:
-.. kernel-doc:: lib/math/div64.c
- :functions: div_s64_rem div64_u64_rem div64_u64 div64_s64
-
.. kernel-doc:: lib/math/gcd.c
:export:
F: Documentation/devicetree/bindings/media/allwinner,sun4i-a10-csi.yaml
F: drivers/media/platform/sunxi/sun4i-csi/
+ALLWINNER A31 CSI DRIVER
+M: Yong Deng <yong.deng@magewell.com>
+M: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
+F: drivers/media/platform/sunxi/sun6i-csi/
+
+ALLWINNER A31 ISP DRIVER
+M: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/allwinner,sun6i-a31-isp.yaml
+F: drivers/staging/media/sunxi/sun6i-isp/
+F: drivers/staging/media/sunxi/sun6i-isp/uapi/sun6i-isp-config.h
+
ALLWINNER A31 MIPI CSI-2 BRIDGE DRIVER
M: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
L: linux-media@vger.kernel.org
F: Documentation/hid/amd-sfh*
F: drivers/hid/amd-sfh-hid/
+AMLOGIC DDR PMU DRIVER
+M: Jiucheng Xu <jiucheng.xu@amlogic.com>
+L: linux-amlogic@lists.infradead.org
+S: Supported
+W: http://www.amlogic.com
+F: Documentation/admin-guide/perf/meson-ddr-pmu.rst
+F: Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml
+F: drivers/perf/amlogic/
+F: include/soc/amlogic/
+
AMPHION VPU CODEC V4L2 DRIVER
M: Ming Qian <ming.qian@nxp.com>
M: Shijie Qin <shijie.qin@nxp.com>
M: Naga Sureshkumar Relli <nagasure@xilinx.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
-F: Documentation/devicetree/bindings/memory-controllers/arm,pl353-smc.yaml
+F: Documentation/devicetree/bindings/memory-controllers/arm,pl35x-smc.yaml
F: drivers/memory/pl353-smc.c
ARM PRIMECELL CLCD PL110 DRIVER
F: Documentation/devicetree/bindings/arm/apple.yaml
F: Documentation/devicetree/bindings/arm/apple/*
F: Documentation/devicetree/bindings/clock/apple,nco.yaml
+F: Documentation/devicetree/bindings/cpufreq/apple,cluster-cpufreq.yaml
F: Documentation/devicetree/bindings/dma/apple,admac.yaml
F: Documentation/devicetree/bindings/i2c/apple,i2c.yaml
F: Documentation/devicetree/bindings/interrupt-controller/apple,*
F: Documentation/devicetree/bindings/iommu/apple,dart.yaml
F: Documentation/devicetree/bindings/iommu/apple,sart.yaml
F: Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml
+F: Documentation/devicetree/bindings/net/bluetooth/brcm,bcm4377-bluetooth.yaml
F: Documentation/devicetree/bindings/nvme/apple,nvme-ans.yaml
F: Documentation/devicetree/bindings/nvmem/apple,efuses.yaml
F: Documentation/devicetree/bindings/pci/apple,pcie.yaml
F: Documentation/devicetree/bindings/power/apple*
F: Documentation/devicetree/bindings/watchdog/apple,wdt.yaml
F: arch/arm64/boot/dts/apple/
+F: drivers/bluetooth/hci_bcm4377.c
F: drivers/clk/clk-apple-nco.c
+F: drivers/cpufreq/apple-soc-cpufreq.c
F: drivers/dma/apple-admac.c
F: drivers/i2c/busses/i2c-pasemi-core.c
F: drivers/i2c/busses/i2c-pasemi-platform.c
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Supported
W: http://www.hisilicon.com
-T: git git://github.com/hisilicon/linux-hisi.git
+T: git https://github.com/hisilicon/linux-hisi.git
F: arch/arm/boot/dts/hi3*
F: arch/arm/boot/dts/hip*
F: arch/arm/boot/dts/hisi*
F: drivers/crypto/ixp4xx_crypto.c
F: drivers/gpio/gpio-ixp4xx.c
F: drivers/irqchip/irq-ixp4xx.c
-F: include/linux/irqchip/irq-ixp4xx.h
-F: include/linux/platform_data/timer-ixp4xx.h
ARM/INTEL KEEMBAY ARCHITECTURE
M: Paul J. Murphy <paul.j.murphy@intel.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/gclement/mvebu.git
+F: Documentation/devicetree/bindings/arm/marvell/marvell,dove.txt
+F: Documentation/devicetree/bindings/arm/marvell/marvell,orion5x.txt
F: Documentation/devicetree/bindings/soc/dove/
F: arch/arm/boot/dts/dove*
F: arch/arm/boot/dts/orion5x*
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/gclement/mvebu.git
+F: Documentation/devicetree/bindings/arm/marvell/
F: arch/arm/boot/dts/armada*
F: arch/arm/boot/dts/kirkwood*
F: arch/arm/configs/mvebu_*_defconfig
S: Supported
T: git git://github.com/microchip-ung/linux-upstream.git
F: arch/arm64/boot/dts/microchip/
+F: drivers/net/ethernet/microchip/vcap/
F: drivers/pinctrl/pinctrl-microchip-sgpio.c
N: sparx5
ARM/QUALCOMM SUPPORT
M: Andy Gross <agross@kernel.org>
M: Bjorn Andersson <andersson@kernel.org>
-R: Konrad Dybcio <konrad.dybcio@somainline.org>
+R: Konrad Dybcio <konrad.dybcio@linaro.org>
L: linux-arm-msm@vger.kernel.org
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux.git
F: arch/arm/mach-realtek/
F: arch/arm64/boot/dts/realtek/
-ARM/RENESAS ARCHITECTURE
+ARM/RISC-V/RENESAS ARCHITECTURE
M: Geert Uytterhoeven <geert+renesas@glider.be>
M: Magnus Damm <magnus.damm@gmail.com>
L: linux-renesas-soc@vger.kernel.org
Q: http://patchwork.kernel.org/project/linux-renesas-soc/list/
C: irc://irc.libera.chat/renesas-soc
T: git git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel.git next
-F: Documentation/devicetree/bindings/arm/renesas.yaml
F: Documentation/devicetree/bindings/hwinfo/renesas,prr.yaml
F: Documentation/devicetree/bindings/soc/renesas/
F: arch/arm/boot/dts/emev2*
F: arch/arm/include/debug/renesas-scif.S
F: arch/arm/mach-shmobile/
F: arch/arm64/boot/dts/renesas/
+F: arch/riscv/boot/dts/renesas/
F: drivers/soc/renesas/
F: include/linux/soc/renesas/
R: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
-T: git git://github.com/broadcom/stblinux.git
+T: git https://github.com/broadcom/stblinux.git
F: Documentation/devicetree/bindings/arm/bcm/brcm,bcmbca.yaml
F: arch/arm64/boot/dts/broadcom/bcmbca/*
N: bcmbca
L: linux-rpi-kernel@lists.infradead.org (moderated for non-subscribers)
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
-T: git git://github.com/broadcom/stblinux.git
+T: git https://github.com/broadcom/stblinux.git
F: Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
F: drivers/pci/controller/pcie-brcmstb.c
F: drivers/staging/vc04_services
M: Scott Branden <sbranden@broadcom.com>
R: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
S: Maintained
-T: git git://github.com/broadcom/mach-bcm
+T: git https://github.com/broadcom/mach-bcm
F: arch/arm/mach-bcm/
N: bcm281*
N: bcm113*
R: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
-T: git git://github.com/broadcom/stblinux.git
+T: git https://github.com/broadcom/stblinux.git
F: Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
F: arch/arm/boot/dts/bcm7*.dts*
F: arch/arm/include/asm/hardware/cache-b15-rac.h
N: bcm7120
BROADCOM BDC DRIVER
+M: Justin Chen <justinpopo6@gmail.com>
M: Al Cooper <alcooperx@gmail.com>
L: linux-usb@vger.kernel.org
R: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
R: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
L: linux-mips@vger.kernel.org
S: Maintained
-T: git git://github.com/broadcom/stblinux.git
+T: git https://github.com/broadcom/stblinux.git
F: arch/mips/bmips/*
F: arch/mips/boot/dts/brcm/bcm*.dts*
F: arch/mips/include/asm/mach-bmips/*
F: drivers/tty/serial/8250/8250_bcm7271.c
BROADCOM BRCMSTB USB EHCI DRIVER
+M: Justin Chen <justinpopo6@gmail.com>
M: Al Cooper <alcooperx@gmail.com>
R: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
L: linux-usb@vger.kernel.org
F: drivers/usb/misc/brcmstb-usb-pinmap.c
BROADCOM BRCMSTB USB2 and USB3 PHY DRIVER
+M: Justin Chen <justinpopo6@gmail.com>
M: Al Cooper <alcooperx@gmail.com>
R: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
L: linux-kernel@vger.kernel.org
R: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
-T: git git://github.com/broadcom/stblinux.git
+T: git https://github.com/broadcom/stblinux.git
F: arch/arm64/boot/dts/broadcom/northstar2/*
F: arch/arm64/boot/dts/broadcom/stingray/*
F: drivers/clk/bcm/clk-ns*
R: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
L: linux-pm@vger.kernel.org
S: Maintained
-T: git git://github.com/broadcom/stblinux.git
+T: git https://github.com/broadcom/stblinux.git
F: drivers/soc/bcm/bcm63xx/bcm-pmb.c
F: include/dt-bindings/soc/bcm-pmb.h
M: David Sterba <dsterba@suse.com>
L: linux-btrfs@vger.kernel.org
S: Maintained
-W: http://btrfs.wiki.kernel.org/
-Q: http://patchwork.kernel.org/project/linux-btrfs/list/
+W: https://btrfs.readthedocs.io
+W: https://btrfs.wiki.kernel.org/
+Q: https://patchwork.kernel.org/project/linux-btrfs/list/
C: irc://irc.libera.chat/btrfs
T: git git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git
F: Documentation/filesystems/btrfs.rst
F: fs/btrfs/
F: include/linux/btrfs*
+F: include/trace/events/btrfs.h
F: include/uapi/linux/btrfs*
BTTV VIDEO4LINUX DRIVER
L: ceph-devel@vger.kernel.org
S: Supported
W: http://ceph.com/
-T: git git://github.com/ceph/ceph-client.git
+T: git https://github.com/ceph/ceph-client.git
F: include/linux/ceph/
F: include/linux/crush/
F: net/ceph/
L: ceph-devel@vger.kernel.org
S: Supported
W: http://ceph.com/
-T: git git://github.com/ceph/ceph-client.git
+T: git https://github.com/ceph/ceph-client.git
F: Documentation/filesystems/ceph.rst
F: fs/ceph/
CHROMEOS EC CODEC DRIVER
M: Cheng-Yi Chiang <cychiang@chromium.org>
-M: Tzung-Bi Shih <tzungbi@google.com>
+M: Tzung-Bi Shih <tzungbi@kernel.org>
R: Guenter Roeck <groeck@chromium.org>
L: chrome-platform@lists.linux.dev
S: Maintained
F: drivers/platform/chrome/cros_usbpd_notify.c
F: include/linux/platform_data/cros_usbpd_notify.h
+CHROMEOS HPS DRIVER
+M: Dan Callaghan <dcallagh@chromium.org>
+R: Sami Kyöstilä <skyostil@chromium.org>
+S: Maintained
+F: drivers/platform/chrome/cros_hps_i2c.c
+
CHRONTEL CH7322 CEC DRIVER
M: Joe Tessler <jrt@google.com>
L: linux-media@vger.kernel.org
CISCO VIC ETHERNET NIC DRIVER
M: Christian Benvenuti <benve@cisco.com>
-M: Govindarajulu Varadarajan <_govind@gmx.com>
+M: Satish Kharat <satishkh@cisco.com>
S: Supported
F: drivers/net/ethernet/cisco/enic/
CONTROL GROUP - BLOCK IO CONTROLLER (BLKIO)
M: Tejun Heo <tj@kernel.org>
+M: Josef Bacik <josef@toxicpanda.com>
M: Jens Axboe <axboe@kernel.dk>
L: cgroups@vger.kernel.org
L: linux-block@vger.kernel.org
F: Documentation/admin-guide/cgroup-v1/blkio-controller.rst
F: block/bfq-cgroup.c
F: block/blk-cgroup.c
+F: block/blk-iocost.c
F: block/blk-iolatency.c
F: block/blk-throttle.c
F: include/linux/blk-cgroup.h
M: Michal Hocko <mhocko@kernel.org>
M: Roman Gushchin <roman.gushchin@linux.dev>
M: Shakeel Butt <shakeelb@google.com>
-R: Muchun Song <songmuchun@bytedance.com>
+R: Muchun Song <muchun.song@linux.dev>
L: cgroups@vger.kernel.org
L: linux-mm@kvack.org
S: Maintained
S: Maintained
F: sound/pci/cs5535audio/
-CSI DRIVERS FOR ALLWINNER V3s
-M: Yong Deng <yong.deng@magewell.com>
-L: linux-media@vger.kernel.org
-S: Maintained
-T: git git://linuxtv.org/media_tree.git
-F: Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
-F: drivers/media/platform/sunxi/sun6i-csi/
-
CTU CAN FD DRIVER
M: Pavel Pisa <pisa@cmp.felk.cvut.cz>
M: Ondrej Ille <ondrej.ille@gmail.com>
CXGB4 CRYPTO DRIVER (chcr)
M: Ayush Sawal <ayush.sawal@chelsio.com>
-M: Vinay Kumar Yadav <vinay.yadav@chelsio.com>
-M: Rohit Maheshwari <rohitm@chelsio.com>
L: linux-crypto@vger.kernel.org
S: Supported
W: http://www.chelsio.com
CXGB4 INLINE CRYPTO DRIVER
M: Ayush Sawal <ayush.sawal@chelsio.com>
-M: Vinay Kumar Yadav <vinay.yadav@chelsio.com>
-M: Rohit Maheshwari <rohitm@chelsio.com>
L: netdev@vger.kernel.org
S: Supported
W: http://www.chelsio.com
S: Maintained
F: drivers/platform/x86/dell/dell-wmi-descriptor.c
+DELL WMI DDV DRIVER
+M: Armin Wolf <W_Armin@gmx.de>
+S: Maintained
+F: Documentation/ABI/testing/debugfs-dell-wmi-ddv
+F: Documentation/ABI/testing/sysfs-platform-dell-wmi-ddv
+F: drivers/platform/x86/dell/dell-wmi-ddv.c
+
DELL WMI SYSMAN DRIVER
M: Divya Bharathi <divya.bharathi@dell.com>
M: Prasanth Ksr <prasanth.ksr@dell.com>
F: include/uapi/linux/devlink.h
F: net/core/devlink.c
-DH ELECTRONICS IMX6 DHCOM BOARD SUPPORT
+DH ELECTRONICS IMX6 DHCOM/DHCOR BOARD SUPPORT
M: Christoph Niedermaier <cniedermaier@dh-electronics.com>
L: kernel@dh-electronics.com
S: Maintained
F: arch/arm/boot/dts/imx6*-dhcom-*
+F: arch/arm/boot/dts/imx6*-dhcor-*
DH ELECTRONICS STM32MP1 DHCOM/DHCOR BOARD SUPPORT
M: Marek Vasut <marex@denx.de>
L: linux-media@vger.kernel.org
S: Maintained
T: git git://linuxtv.org/media_tree.git
-F: Documentation/devicetree/bindings/media/i2c/dongwoon,dw9714.txt
+F: Documentation/devicetree/bindings/media/i2c/dongwoon,dw9714.yaml
F: drivers/media/i2c/dw9714.c
DONGWOON DW9768 LENS VOICE COIL DRIVER
F: drivers/net/ethernet/freescale/dpaa2/Makefile
F: drivers/net/ethernet/freescale/dpaa2/dpaa2-eth*
F: drivers/net/ethernet/freescale/dpaa2/dpaa2-mac*
+F: drivers/net/ethernet/freescale/dpaa2/dpaa2-xsk*
F: drivers/net/ethernet/freescale/dpaa2/dpkg.h
F: drivers/net/ethernet/freescale/dpaa2/dpmac*
F: drivers/net/ethernet/freescale/dpaa2/dpni*
F: drivers/gpu/drm/i810/
F: include/uapi/drm/i810_drm.h
+DRM DRIVER FOR JADARD JD9365DA-H3 MIPI-DSI LCD PANELS
+M: Jagan Teki <jagan@edgeble.ai>
+S: Maintained
+F: Documentation/devicetree/bindings/display/panel/jadard,jd9365da-h3.yaml
+F: drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c
+
DRM DRIVER FOR LOGICVC DISPLAY CONTROLLER
M: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
S: Supported
S: Maintained
T: git git://anongit.freedesktop.org/drm/drm-misc
F: drivers/gpu/drm/drm_aperture.c
+F: drivers/gpu/drm/tiny/ofdrm.c
F: drivers/gpu/drm/tiny/simpledrm.c
F: drivers/video/aperture.c
+F: drivers/video/nomodeset.c
F: include/drm/drm_aperture.h
F: include/linux/aperture.h
+F: include/video/nomodeset.h
DRM DRIVER FOR SIS VIDEO CARDS
S: Orphan / Obsolete
F: include/linux/vga*
F: include/uapi/drm/drm*
+DRM COMPUTE ACCELERATORS DRIVERS AND FRAMEWORK
+M: Oded Gabbay <ogabbay@kernel.org>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+C: irc://irc.oftc.net/dri-devel
+T: git https://git.kernel.org/pub/scm/linux/kernel/git/ogabbay/accel.git
+F: Documentation/accel/
+F: drivers/accel/
+
DRM DRIVERS FOR ALLWINNER A10
M: Maxime Ripard <mripard@kernel.org>
M: Chen-Yu Tsai <wens@csie.org>
F: include/drm/ttm/
DRM GPU SCHEDULER
-M: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
+M: Luben Tuikov <luben.tuikov@amd.com>
L: dri-devel@lists.freedesktop.org
S: Maintained
T: git git://anongit.freedesktop.org/drm/drm-misc
EDAC-CORE
M: Borislav Petkov <bp@alien8.de>
-M: Mauro Carvalho Chehab <mchehab@kernel.org>
M: Tony Luck <tony.luck@intel.com>
R: James Morse <james.morse@arm.com>
+R: Mauro Carvalho Chehab <mchehab@kernel.org>
R: Robert Richter <rric@kernel.org>
L: linux-edac@vger.kernel.org
S: Supported
F: drivers/edac/pnd2_edac.[ch]
EDAC-QCOM
-M: Channagoud Kadabi <ckadabi@codeaurora.org>
-M: Venkata Narendra Kumar Gutta <vnkgutta@codeaurora.org>
+M: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
L: linux-arm-msm@vger.kernel.org
L: linux-edac@vger.kernel.org
S: Maintained
M: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
L: linux-can@vger.kernel.org
S: Maintained
+F: Documentation/networking/devlink/etas_es58x.rst
F: drivers/net/can/usb/etas_es58x/
ETHERNET BRIDGE
F: arch/*/include/asm/efi.h
F: arch/*/kernel/efi.c
F: arch/arm/boot/compressed/efi-header.S
-F: arch/arm64/kernel/efi-entry.S
F: arch/x86/platform/efi/
F: drivers/firmware/efi/
F: include/linux/efi*.h
T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening
F: include/linux/fortify-string.h
F: lib/fortify_kunit.c
+ F: lib/memcpy_kunit.c
+ F: lib/strscpy_kunit.c
F: lib/test_fortify/*
F: scripts/test_fortify.sh
K: \b__NO_FORTIFY\b
F: drivers/i2c/busses/i2c-cpm.c
FREESCALE IMX / MXC FEC DRIVER
-M: Joakim Zhang <qiangqing.zhang@nxp.com>
+M: Wei Fang <wei.fang@nxp.com>
+R: Shenwei Wang <shenwei.wang@nxp.com>
+R: Clark Wang <xiaoning.wang@nxp.com>
+R: NXP Linux Team <linux-imx@nxp.com>
L: netdev@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/net/fsl,fec.yaml
F: include/uapi/asm-generic/
GENERIC PHY FRAMEWORK
-M: Kishon Vijay Abraham I <kishon@ti.com>
M: Vinod Koul <vkoul@kernel.org>
+M: Kishon Vijay Abraham I <kishon@kernel.org>
L: linux-phy@lists.infradead.org
S: Supported
Q: https://patchwork.kernel.org/project/linux-phy/list/
M: Sean Young <sean@mess.org>
L: linux-media@vger.kernel.org
S: Maintained
+F: Documentation/devicetree/bindings/leds/irled/gpio-ir-tx.yaml
F: drivers/media/rc/gpio-ir-tx.c
GPIO MOCKUP DRIVER
F: Documentation/scsi/hptiop.rst
F: drivers/scsi/hptiop.c
+HIMAX HX83112B TOUCHSCREEN SUPPORT
+M: Job Noorman <job@noorman.info>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/input/touchscreen/himax,hx83112b.yaml
+F: drivers/input/touchscreen/himax_hx83112b.c
+
HIPPI
M: Jes Sorensen <jes@trained-monkey.org>
L: linux-hippi@sunsite.dk
F: drivers/i2c/busses/i2c-hisi.c
HISILICON LPC BUS DRIVER
-M: john.garry@huawei.com
+M: Jay Fang <f.fangjian@huawei.com>
S: Maintained
W: http://www.hisilicon.com
F: Documentation/devicetree/bindings/arm/hisilicon/low-pin-count.yaml
HISILICON PMU DRIVER
M: Shaokun Zhang <zhangshaokun@hisilicon.com>
-M: Qi Liu <liuqi115@huawei.com>
+M: Jonathan Cameron <jonathan.cameron@huawei.com>
S: Supported
W: http://www.hisilicon.com
F: Documentation/admin-guide/perf/hisi-pcie-pmu.rst
F: drivers/infiniband/hw/hns/
HISILICON SAS Controller
-M: John Garry <john.garry@huawei.com>
+M: Xiang Chen <chenxiang66@hisilicon.com>
S: Supported
W: http://www.hisilicon.com
F: Documentation/devicetree/bindings/scsi/hisilicon-sas.txt
F: drivers/crypto/hisilicon/trng/trng.c
HISILICON V3XX SPI NOR FLASH Controller Driver
-M: John Garry <john.garry@huawei.com>
+M: Jay Fang <f.fangjian@huawei.com>
S: Maintained
W: http://www.hisilicon.com
F: drivers/spi/spi-hisi-sfc-v3xx.c
HP COMPAQ TC1100 TABLET WMI EXTRAS DRIVER
L: platform-driver-x86@vger.kernel.org
S: Orphan
-F: drivers/platform/x86/tc1100-wmi.c
+F: drivers/platform/x86/hp/tc1100-wmi.c
HPET: High Precision Event Timers driver
M: Clemens Ladisch <clemens@ladisch.de>
F: drivers/iio/humidity/hts221*
HUAWEI ETHERNET DRIVER
+M: Cai Huoqing <cai.huoqing@linux.dev>
L: netdev@vger.kernel.org
-S: Orphan
+S: Maintained
F: Documentation/networking/device_drivers/ethernet/huawei/hinic.rst
F: drivers/net/ethernet/huawei/hinic/
HUGETLB SUBSYSTEM
M: Mike Kravetz <mike.kravetz@oracle.com>
-M: Muchun Song <songmuchun@bytedance.com>
+M: Muchun Song <muchun.song@linux.dev>
L: linux-mm@kvack.org
S: Maintained
F: Documentation/ABI/testing/sysfs-kernel-mm-hugepages
Hyper-V/Azure CORE AND DRIVERS
M: "K. Y. Srinivasan" <kys@microsoft.com>
M: Haiyang Zhang <haiyangz@microsoft.com>
-M: Stephen Hemminger <sthemmin@microsoft.com>
M: Wei Liu <wei.liu@kernel.org>
M: Dexuan Cui <decui@microsoft.com>
L: linux-hyperv@vger.kernel.org
F: include/asm-generic/mshyperv.h
F: include/clocksource/hyperv_timer.h
F: include/linux/hyperv.h
+F: include/net/mana
F: include/uapi/linux/hyperv.h
F: net/vmw_vsock/hyperv_transport.c
F: tools/hv/
F: drivers/i3c/master/i3c-master-cdns.c
I3C DRIVER FOR SYNOPSYS DESIGNWARE
-M: Vitor Soares <vitor.soares@synopsys.com>
-S: Maintained
+S: Orphan
F: Documentation/devicetree/bindings/i3c/snps,dw-i3c-master.yaml
F: drivers/i3c/master/dw*
F: drivers/pci/hotplug/rpaphp*
IBM Power SRIOV Virtual NIC Device Driver
-M: Dany Madden <drt@linux.ibm.com>
+M: Haren Myneni <haren@linux.ibm.com>
+M: Rick Lindsley <ricklind@linux.ibm.com>
+R: Nick Child <nnac123@linux.ibm.com>
+R: Dany Madden <danymadden@us.ibm.com>
R: Thomas Falcon <tlfalcon@linux.ibm.com>
L: netdev@vger.kernel.org
S: Supported
F: drivers/hwmon/ina2xx.c
F: include/linux/platform_data/ina2xx.h
+INDEX OF FURTHER KERNEL DOCUMENTATION
+M: Carlos Bilbao <carlos.bilbao@amd.com>
+S: Maintained
+F: Documentation/process/kernel-docs.rst
+
INDUSTRY PACK SUBSYSTEM (IPACK)
M: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
M: Jens Taprogge <jens.taprogge@taprogge.org>
F: include/rdma/
F: include/trace/events/ib_mad.h
F: include/trace/events/ib_umad.h
+F: include/trace/misc/rdma.h
F: include/uapi/linux/if_infiniband.h
F: include/uapi/rdma/
F: samples/bpf/ibumad_kern.c
B: https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs
C: irc://irc.oftc.net/intel-gfx
T: git git://anongit.freedesktop.org/drm-intel
+F: Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
F: Documentation/gpu/i915.rst
F: drivers/gpu/drm/i915/
F: include/drm/i915*
F: drivers/gpu/drm/i915/gvt/
INTEL HID EVENT DRIVER
-M: Alex Hung <alex.hung@canonical.com>
+M: Alex Hung <alexhung@gmail.com>
L: platform-driver-x86@vger.kernel.org
S: Maintained
F: drivers/platform/x86/intel/hid.c
F: drivers/iommu/iova.c
F: include/linux/iova.h
+IOMMUFD
+M: Jason Gunthorpe <jgg@nvidia.com>
+M: Kevin Tian <kevin.tian@intel.com>
+L: iommu@lists.linux.dev
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd.git
+F: Documentation/userspace-api/iommufd.rst
+F: drivers/iommu/iommufd/
+F: include/linux/iommufd.h
+F: include/uapi/linux/iommufd.h
+F: tools/testing/selftests/iommu/
+
IOMMU SUBSYSTEM
M: Joerg Roedel <joro@8bytes.org>
M: Will Deacon <will@kernel.org>
F: drivers/isdn/hardware/
F: drivers/isdn/mISDN/
+ISOFS FILESYSTEM
+M: Jan Kara <jack@suse.cz>
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+F: Documentation/filesystems/isofs.rst
+F: fs/isofs/
+
IT87 HARDWARE MONITORING DRIVER
M: Jean Delvare <jdelvare@suse.com>
L: linux-hwmon@vger.kernel.org
JFS FILESYSTEM
M: Dave Kleikamp <shaggy@kernel.org>
L: jfs-discussion@lists.sourceforge.net
-S: Maintained
+S: Odd Fixes
W: http://jfs.sourceforge.net/
-T: git git://github.com/kleikamp/linux-shaggy.git
+T: git https://github.com/kleikamp/linux-shaggy.git
F: Documentation/admin-guide/jfs.rst
F: fs/jfs/
M: Masahiro Yamada <masahiroy@kernel.org>
L: linux-kbuild@vger.kernel.org
S: Maintained
+Q: https://patchwork.kernel.org/project/linux-kbuild/list/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git kconfig
F: Documentation/kbuild/kconfig*
F: scripts/Kconfig.include
KERNEL BUILD + files below scripts/ (unless maintained elsewhere)
M: Masahiro Yamada <masahiroy@kernel.org>
-M: Michal Marek <michal.lkml@markovi.net>
+R: Nathan Chancellor <nathan@kernel.org>
R: Nick Desaulniers <ndesaulniers@google.com>
+R: Nicolas Schier <nicolas@fjasle.eu>
L: linux-kbuild@vger.kernel.org
S: Maintained
+Q: https://patchwork.kernel.org/project/linux-kbuild/list/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git
F: Documentation/kbuild/
F: Makefile
L: linux-hardening@vger.kernel.org
S: Supported
T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening
+ F: Documentation/ABI/testing/sysfs-kernel-oops_count
+ F: Documentation/ABI/testing/sysfs-kernel-warn_count
F: include/linux/overflow.h
F: include/linux/randomize_kstack.h
F: mm/usercopy.c
S: Supported
W: http://nfs.sourceforge.net/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux.git
+F: fs/exportfs/
F: fs/lockd/
F: fs/nfs_common/
F: fs/nfsd/
F: include/linux/lockd/
F: include/linux/sunrpc/
+F: include/trace/events/rpcgss.h
+F: include/trace/events/rpcrdma.h
+F: include/trace/events/sunrpc.h
+F: include/trace/misc/fs.h
+F: include/trace/misc/nfs.h
+F: include/trace/misc/sunrpc.h
F: include/uapi/linux/nfsd/
F: include/uapi/linux/sunrpc/
F: net/sunrpc/
L: kvm-riscv@lists.infradead.org
L: linux-riscv@lists.infradead.org
S: Maintained
-T: git git://github.com/kvm-riscv/linux.git
+T: git https://github.com/kvm-riscv/linux.git
F: arch/riscv/include/asm/kvm*
F: arch/riscv/include/uapi/asm/kvm*
F: arch/riscv/kvm/
R: David Hildenbrand <david@redhat.com>
L: kvm@vger.kernel.org
S: Supported
-W: http://www.ibm.com/developerworks/linux/linux390/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git
F: Documentation/virt/kvm/s390*
F: arch/s390/include/asm/gmap.h
S: Maintained
F: Documentation/misc-devices/lis3lv02d.rst
F: drivers/misc/lis3lv02d/
-F: drivers/platform/x86/hp_accel.c
+F: drivers/platform/x86/hp/hp_accel.c
LIST KUNIT TEST
M: David Gow <davidgow@google.com>
F: Documentation/loongarch/
F: Documentation/translations/zh_CN/loongarch/
+LOONGSON-2 SOC SERIES GUTS DRIVER
+M: Yinbo Zhu <zhuyinbo@loongson.cn>
+L: loongarch@lists.linux.dev
+S: Maintained
+F: Documentation/devicetree/bindings/hwinfo/loongson,ls2k-chipid.yaml
+F: drivers/soc/loongson/loongson2_guts.c
+
+LOONGSON-2 SOC SERIES PINCTRL DRIVER
+M: zhanghongchen <zhanghongchen@loongson.cn>
+M: Yinbo Zhu <zhuyinbo@loongson.cn>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pinctrl/loongson,ls2k-pinctrl.yaml
+F: drivers/pinctrl/pinctrl-loongson2.c
+
LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI)
M: Sathya Prakash <sathya.prakash@broadcom.com>
M: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
L: ltp@lists.linux.it (subscribers-only)
S: Maintained
W: http://linux-test-project.github.io/
-T: git git://github.com/linux-test-project/ltp.git
+T: git https://github.com/linux-test-project/ltp.git
LYNX 28G SERDES PHY DRIVER
M: Ioana Ciornei <ioana.ciornei@nxp.com>
MARVELL 88E6XXX ETHERNET SWITCH FABRIC DRIVER
M: Andrew Lunn <andrew@lunn.ch>
-M: Vivien Didelot <vivien.didelot@gmail.com>
L: netdev@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/net/dsa/marvell.txt
M: Russell King <linux@armlinux.org.uk>
L: netdev@vger.kernel.org
S: Maintained
-F: Documentation/devicetree/bindings/net/marvell-pp2.txt
+F: Documentation/devicetree/bindings/net/marvell,pp2.yaml
F: drivers/net/ethernet/marvell/mvpp2/
MARVELL MWIFIEX WIRELESS DRIVER
F: drivers/net/ethernet/marvell/octeontx2/af/
MARVELL PRESTERA ETHERNET SWITCH DRIVER
-M: Taras Chornyi <tchornyi@marvell.com>
+M: Taras Chornyi <taras.chornyi@plvision.eu>
S: Supported
W: https://github.com/Marvell-switching/switchdev-prestera
F: drivers/net/ethernet/marvell/prestera/
F: Documentation/devicetree/bindings/media/nxp,imx-mipi-csi2.yaml
F: Documentation/devicetree/bindings/media/nxp,imx7-csi.yaml
F: drivers/media/platform/nxp/imx-mipi-csis.c
-F: drivers/staging/media/imx/imx7-media-csi.c
+F: drivers/media/platform/nxp/imx7-media-csi.c
MEDIA DRIVERS FOR HELENE
M: Abylay Ospan <aospan@netup.ru>
M: John Crispin <john@phrozen.org>
M: Sean Wang <sean.wang@mediatek.com>
M: Mark Lee <Mark-MC.Lee@mediatek.com>
+M: Lorenzo Bianconi <lorenzo@kernel.org>
L: netdev@vger.kernel.org
S: Maintained
F: drivers/net/ethernet/mediatek/
F: include/linux/mm.h
F: include/linux/mmzone.h
F: include/linux/pagewalk.h
-F: include/linux/vmalloc.h
F: mm/
F: tools/testing/selftests/vm/
+VMALLOC
+M: Andrew Morton <akpm@linux-foundation.org>
+R: Uladzislau Rezki <urezki@gmail.com>
+R: Christoph Hellwig <hch@infradead.org>
+L: linux-mm@kvack.org
+S: Maintained
+W: http://www.linux-mm.org
+T: git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
+F: include/linux/vmalloc.h
+F: mm/vmalloc.c
+
MEMORY HOT(UN)PLUG
M: David Hildenbrand <david@redhat.com>
M: Oscar Salvador <osalvador@suse.de>
M: Liang Yang <liang.yang@amlogic.com>
L: linux-mtd@lists.infradead.org
S: Maintained
-F: Documentation/devicetree/bindings/mtd/amlogic,meson-nand.txt
+F: Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
F: drivers/mtd/nand/raw/meson_*
MESON VIDEO DECODER DRIVER FOR AMLOGIC SOCS
L: linux-media@vger.kernel.org
S: Supported
F: Documentation/devicetree/bindings/media/microchip,csi2dc.yaml
-F: drivers/media/platform/atmel/microchip-csi2dc.c
+F: drivers/media/platform/microchip/microchip-csi2dc.c
MICROCHIP ECC DRIVER
M: Tudor Ambarus <tudor.ambarus@microchip.com>
S: Supported
F: Documentation/devicetree/bindings/media/atmel,isc.yaml
F: Documentation/devicetree/bindings/media/microchip,xisc.yaml
-F: drivers/media/platform/atmel/atmel-isc*
-F: drivers/media/platform/atmel/atmel-sama*-isc*
+F: drivers/staging/media/deprecated/atmel/atmel-isc*
+F: drivers/staging/media/deprecated/atmel/atmel-sama*-isc*
+F: drivers/media/platform/microchip/microchip-isc*
+F: drivers/media/platform/microchip/microchip-sama*-isc*
F: include/linux/atmel-isc-media.h
MICROCHIP ISI DRIVER
F: drivers/misc/atmel-ssc.c
F: include/linux/atmel-ssc.h
+MICROCHIP SOC DRIVERS
+M: Conor Dooley <conor@kernel.org>
+S: Supported
+T: git https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git/
+F: drivers/soc/microchip/
+
MICROCHIP USB251XB DRIVER
M: Richard Leitner <richard.leitner@skidata.com>
L: linux-usb@vger.kernel.org
F: include/linux/cciss*.h
F: include/uapi/linux/cciss*.h
+MICROSOFT MANA RDMA DRIVER
+M: Long Li <longli@microsoft.com>
+M: Ajay Sharma <sharmaajay@microsoft.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+F: drivers/infiniband/hw/mana/
+F: include/net/mana
+F: include/uapi/rdma/mana-abi.h
+
MICROSOFT SURFACE AGGREGATOR TABLET-MODE SWITCH
M: Maximilian Luz <luzmaximilian@gmail.com>
L: platform-driver-x86@vger.kernel.org
MOTORCOMM PHY DRIVER
M: Peter Geis <pgwipeout@gmail.com>
+M: Frank <Frank.Sae@motor-comm.com>
L: netdev@vger.kernel.org
S: Maintained
F: drivers/net/phy/motorcomm.c
NETWORKING [DSA]
M: Andrew Lunn <andrew@lunn.ch>
-M: Vivien Didelot <vivien.didelot@gmail.com>
M: Florian Fainelli <f.fainelli@gmail.com>
M: Vladimir Oltean <olteanv@gmail.com>
S: Maintained
S: Supported
W: https://nilfs.sourceforge.io/
W: https://nilfs.osdn.jp/
-T: git git://github.com/konis/nilfs2.git
+T: git https://github.com/konis/nilfs2.git
F: Documentation/filesystems/nilfs2.rst
F: fs/nilfs2/
F: include/trace/events/nilfs2.h
F: drivers/nvme/target/fabrics-cmd-auth.c
F: include/linux/nvme-auth.h
+NVM EXPRESS HARDWARE MONITORING SUPPORT
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-nvme@lists.infradead.org
+S: Supported
+F: drivers/nvme/host/hwmon.c
+
NVM EXPRESS FC TRANSPORT DRIVERS
M: James Smart <james.smart@broadcom.com>
L: linux-nvme@lists.infradead.org
T: git git://linuxtv.org/media_tree.git
F: drivers/media/i2c/ov08d10.c
+OMNIVISION OV08X40 SENSOR DRIVER
+M: Jason Chen <jason.z.chen@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/ov08x40.c
+
OMNIVISION OV13858 SENSOR DRIVER
M: Sakari Ailus <sakari.ailus@linux.intel.com>
L: linux-media@vger.kernel.org
T: git git://linuxtv.org/media_tree.git
F: drivers/media/i2c/ov2740.c
+OMNIVISION OV4689 SENSOR DRIVER
+M: Mikhail Rudenko <mike.rudenko@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/ovti,ov4689.yaml
+F: drivers/media/i2c/ov5647.c
+
OMNIVISION OV5640 SENSOR DRIVER
M: Steve Longerbeam <slongerbeam@gmail.com>
L: linux-media@vger.kernel.org
F: drivers/mtd/nand/onenand/
F: include/linux/mtd/onenand*.h
+ONEXPLAYER FAN DRIVER
+M: Joaquín Ignacio Aramendía <samsagax@gmail.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: drivers/hwmon/oxp-sensors.c
+
ONION OMEGA2+ BOARD
M: Harvey Hunt <harveyhuntnexus@gmail.com>
L: linux-mips@vger.kernel.org
W: http://openvswitch.org
F: include/uapi/linux/openvswitch.h
F: net/openvswitch/
+F: tools/testing/selftests/net/openvswitch/
OPERATING PERFORMANCE POINTS (OPP)
M: Viresh Kumar <vireshk@kernel.org>
F: drivers/input/serio/hp_sdc*
F: drivers/parisc/
F: drivers/parport/parport_gsc.*
-F: drivers/tty/serial/8250/8250_gsc.c
+F: drivers/tty/serial/8250/8250_parisc.c
F: drivers/video/console/sti*
F: drivers/video/fbdev/sti*
F: drivers/video/logo/logo_parisc*
F: drivers/pci/controller/dwc/*designware*
PCI DRIVER FOR TI DRA7XX/J721E
-M: Kishon Vijay Abraham I <kishon@ti.com>
+M: Vignesh Raghavendra <vigneshr@ti.com>
L: linux-omap@vger.kernel.org
L: linux-pci@vger.kernel.org
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
F: drivers/pci/controller/pci-v3-semi.c
PCI ENDPOINT SUBSYSTEM
-M: Kishon Vijay Abraham I <kishon@ti.com>
M: Lorenzo Pieralisi <lpieralisi@kernel.org>
R: Krzysztof Wilczyński <kw@linux.com>
R: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+R: Kishon Vijay Abraham I <kishon@kernel.org>
L: linux-pci@vger.kernel.org
S: Supported
Q: https://patchwork.kernel.org/project/linux-pci/list/
B: https://bugzilla.kernel.org
C: irc://irc.oftc.net/linux-pci
T: git git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/pci.git
+F: Documentation/devicetree/bindings/pci/
F: drivers/pci/controller/
F: drivers/pci/pci-bridge-emul.c
F: drivers/pci/pci-bridge-emul.h
F: drivers/pci/controller/*microchip*
PCIE DRIVER FOR QUALCOMM MSM
-M: Stanimir Varbanov <svarbanov@mm-sol.com>
+M: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
L: linux-pci@vger.kernel.org
L: linux-arm-msm@vger.kernel.org
S: Maintained
F: include/linux/peci.h
PENSANDO ETHERNET DRIVERS
-M: Shannon Nelson <snelson@pensando.io>
+M: Shannon Nelson <shannon.nelson@amd.com>
+M: Brett Creeley <brett.creeley@amd.com>
M: drivers@pensando.io
L: netdev@vger.kernel.org
S: Supported
L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
S: Maintained
F: Documentation/devicetree/bindings/pinctrl/mediatek,mt65xx-pinctrl.yaml
-F: Documentation/devicetree/bindings/pinctrl/mediatek,mt6797-pinctrl.yaml
+F: Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml
F: Documentation/devicetree/bindings/pinctrl/mediatek,mt7622-pinctrl.yaml
F: Documentation/devicetree/bindings/pinctrl/mediatek,mt8183-pinctrl.yaml
F: drivers/pinctrl/mediatek/
F: Documentation/devicetree/bindings/input/pine64,pinephone-keyboard.yaml
F: drivers/input/keyboard/pinephone-keyboard.c
-PKTCDVD DRIVER
-M: linux-block@vger.kernel.org
-S: Orphan
-F: drivers/block/pktcdvd.c
-F: include/linux/pktcdvd.h
-F: include/uapi/linux/pktcdvd.h
-
PLANTOWER PMS7003 AIR POLLUTION SENSOR DRIVER
M: Tomasz Duszynski <tduszyns@gmail.com>
S: Maintained
PSTORE FILESYSTEM
M: Kees Cook <keescook@chromium.org>
-M: Anton Vorontsov <anton@enomsg.org>
-M: Colin Cross <ccross@android.com>
-M: Tony Luck <tony.luck@intel.com>
-S: Maintained
+R: Tony Luck <tony.luck@intel.com>
+R: Guilherme G. Piccoli <gpiccoli@igalia.com>
+L: linux-hardening@vger.kernel.org
+S: Supported
T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/pstore
F: Documentation/admin-guide/ramoops.rst
F: Documentation/admin-guide/pstore-blk.rst
F: drivers/net/phy/dp83640*
F: drivers/ptp/*
F: include/linux/ptp_cl*
+K: (?:\b|_)ptp(?:\b|_)
PTP VIRTUAL CLOCK SUPPORT
M: Yangbo Lu <yangbo.lu@nxp.com>
L: linux-media@vger.kernel.org
S: Maintained
T: git git://linuxtv.org/media_tree.git
-F: Documentation/admin-guide/media/pulse8-cec.rst
F: drivers/media/cec/usb/pulse8/
PURELIFI PLFXLC DRIVER
M: Sean Young <sean@mess.org>
L: linux-media@vger.kernel.org
S: Maintained
+F: Documentation/devicetree/bindings/leds/irled/pwm-ir-tx.yaml
F: drivers/media/rc/pwm-ir-tx.c
PWM SUBSYSTEM
M: Banajit Goswami <bgoswami@quicinc.com>
L: alsa-devel@alsa-project.org (moderated for non-subscribers)
S: Supported
-F: Documentation/devicetree/bindings/soc/qcom/qcom,apr.yaml
+F: Documentation/devicetree/bindings/soc/qcom/qcom,apr*
F: Documentation/devicetree/bindings/sound/qcom,*
F: drivers/soc/qcom/apr.c
F: include/dt-bindings/sound/qcom,wcd9335.h
F: drivers/thermal/qcom/
QUALCOMM VENUS VIDEO ACCELERATOR DRIVER
-M: Stanimir Varbanov <stanimir.varbanov@linaro.org>
+M: Stanimir Varbanov <stanimir.k.varbanov@gmail.com>
+M: Vikash Garodia <quic_vgarodia@quicinc.com>
L: linux-media@vger.kernel.org
L: linux-arm-msm@vger.kernel.org
S: Maintained
L: ceph-devel@vger.kernel.org
S: Supported
W: http://ceph.com/
-T: git git://github.com/ceph/ceph-client.git
+T: git https://github.com/ceph/ceph-client.git
F: Documentation/ABI/testing/sysfs-bus-rbd
F: drivers/block/rbd.c
F: drivers/block/rbd_types.h
F: drivers/net/wireless/realtek/rtw89/
REDPINE WIRELESS DRIVER
-M: Amitkumar Karwar <amitkarwar@gmail.com>
-M: Siva Rebbagondla <siva8118@gmail.com>
L: linux-wireless@vger.kernel.org
-S: Maintained
+S: Orphan
F: drivers/net/wireless/rsi/
REGISTER MAP ABSTRACTION
N: riscv
K: riscv
-RISC-V/MICROCHIP POLARFIRE SOC SUPPORT
+RISC-V MICROCHIP FPGA SUPPORT
M: Conor Dooley <conor.dooley@microchip.com>
M: Daire McNamara <daire.mcnamara@microchip.com>
L: linux-riscv@lists.infradead.org
F: arch/riscv/boot/dts/microchip/
F: drivers/char/hw_random/mpfs-rng.c
F: drivers/clk/microchip/clk-mpfs.c
-F: drivers/i2c/busses/i2c-microchip-core.c
+F: drivers/i2c/busses/i2c-microchip-corei2c.c
F: drivers/mailbox/mailbox-mpfs.c
F: drivers/pci/controller/pcie-microchip-host.c
F: drivers/reset/reset-mpfs.c
F: drivers/rtc/rtc-mpfs.c
-F: drivers/soc/microchip/
+F: drivers/soc/microchip/mpfs-sys-controller.c
F: drivers/spi/spi-microchip-core-qspi.c
F: drivers/spi/spi-microchip-core.c
F: drivers/usb/musb/mpfs.c
F: include/soc/microchip/mpfs.h
+RISC-V MISC SOC SUPPORT
+M: Conor Dooley <conor@kernel.org>
+L: linux-riscv@lists.infradead.org
+S: Maintained
+Q: https://patchwork.kernel.org/project/linux-riscv/list/
+T: git https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git/
+F: Documentation/devicetree/bindings/riscv/
+F: arch/riscv/boot/dts/
+
RNBD BLOCK DRIVERS
M: Md. Haris Iqbal <haris.iqbal@ionos.com>
M: Jack Wang <jinpu.wang@ionos.com>
F: drivers/tty/serial/rp2.*
ROHM BD99954 CHARGER IC
-R: Matti Vaittinen <mazziesaccount@gmail.com>
+M: Matti Vaittinen <mazziesaccount@gmail.com>
S: Supported
F: drivers/power/supply/bd99954-charger.c
F: drivers/power/supply/bd99954-charger.h
F: include/linux/mfd/bd9571mwv.h
ROHM POWER MANAGEMENT IC DEVICE DRIVERS
-R: Matti Vaittinen <mazziesaccount@gmail.com>
+M: Matti Vaittinen <mazziesaccount@gmail.com>
S: Supported
F: drivers/clk/clk-bd718x7.c
F: drivers/gpio/gpio-bd71815.c
S: Maintained
F: drivers/video/fbdev/savage/
-S390
+S390 ARCHITECTURE
M: Heiko Carstens <hca@linux.ibm.com>
M: Vasily Gorbik <gor@linux.ibm.com>
M: Alexander Gordeev <agordeev@linux.ibm.com>
R: Sven Schnelle <svens@linux.ibm.com>
L: linux-s390@vger.kernel.org
S: Supported
-W: http://www.ibm.com/developerworks/linux/linux390/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git
F: Documentation/driver-api/s390-drivers.rst
F: Documentation/s390/
M: Peter Oberparleiter <oberpar@linux.ibm.com>
L: linux-s390@vger.kernel.org
S: Supported
-W: http://www.ibm.com/developerworks/linux/linux390/
F: drivers/s390/cio/
S390 DASD DRIVER
M: Jan Hoeppner <hoeppner@linux.ibm.com>
L: linux-s390@vger.kernel.org
S: Supported
-W: http://www.ibm.com/developerworks/linux/linux390/
F: block/partitions/ibm.c
F: drivers/s390/block/dasd*
F: include/linux/dasd_mod.h
M: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
L: linux-s390@vger.kernel.org
S: Supported
-W: http://www.ibm.com/developerworks/linux/linux390/
F: drivers/iommu/s390-iommu.c
S390 IUCV NETWORK LAYER
L: linux-s390@vger.kernel.org
L: netdev@vger.kernel.org
S: Supported
-W: http://www.ibm.com/developerworks/linux/linux390/
F: drivers/s390/net/*iucv*
F: include/net/iucv/
F: net/iucv/
L: linux-s390@vger.kernel.org
L: netdev@vger.kernel.org
S: Supported
-W: http://www.ibm.com/developerworks/linux/linux390/
F: drivers/s390/net/
+S390 MM
+M: Alexander Gordeev <agordeev@linux.ibm.com>
+M: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git
+F: arch/s390/include/asm/pgtable.h
+F: arch/s390/mm
+
S390 PCI SUBSYSTEM
M: Niklas Schnelle <schnelle@linux.ibm.com>
M: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
L: linux-s390@vger.kernel.org
S: Supported
-W: http://www.ibm.com/developerworks/linux/linux390/
F: arch/s390/pci/
F: drivers/pci/hotplug/s390_pci_hpc.c
F: Documentation/s390/pci.rst
M: Jason Herne <jjherne@linux.ibm.com>
L: linux-s390@vger.kernel.org
S: Supported
-W: http://www.ibm.com/developerworks/linux/linux390/
F: Documentation/s390/vfio-ap*
F: drivers/s390/crypto/vfio_ap*
M: Harald Freudenberger <freude@linux.ibm.com>
L: linux-s390@vger.kernel.org
S: Supported
-W: http://www.ibm.com/developerworks/linux/linux390/
F: drivers/s390/crypto/
S390 ZFCP DRIVER
M: Benjamin Block <bblock@linux.ibm.com>
L: linux-s390@vger.kernel.org
S: Supported
-W: http://www.ibm.com/developerworks/linux/linux390/
F: drivers/s390/scsi/zfcp_*
S3C ADC BATTERY DRIVER
S: Maintained
T: git git://linuxtv.org/media_tree.git
F: drivers/staging/media/deprecated/saa7146/
-F: include/media/drv-intf/saa7146*
SAFESETID SECURITY MODULE
M: Micah Morton <mortonm@chromium.org>
SAMSUNG S3FWRN5 NFC DRIVER
M: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
-M: Krzysztof Opasiak <k.opasiak@samsung.com>
L: linux-nfc@lists.01.org (subscribers-only)
S: Maintained
F: Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml
K: \bTIF_SECCOMP\b
SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) Broadcom BRCMSTB DRIVER
+M: Kamal Dasu <kdasu.kdev@gmail.com>
M: Al Cooper <alcooperx@gmail.com>
R: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
L: linux-mmc@vger.kernel.org
M: Adrian Hunter <adrian.hunter@intel.com>
L: linux-mmc@vger.kernel.org
S: Supported
+F: Documentation/devicetree/bindings/mmc/sdhci-common.yaml
F: drivers/mmc/host/sdhci*
SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) MICROCHIP DRIVER
M: Jan Karcher <jaka@linux.ibm.com>
L: linux-s390@vger.kernel.org
S: Supported
-W: http://www.ibm.com/developerworks/linux/linux390/
F: net/smc/
SHARP GP2AP002A00F/GP2AP002S00F SENSOR DRIVER
M: Paul Walmsley <paul.walmsley@sifive.com>
L: linux-riscv@lists.infradead.org
S: Supported
-T: git git://github.com/sifive/riscv-linux.git
N: sifive
K: [^@]sifive
F: Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
F: drivers/dma/sf-pdma/
+SIFIVE SOC DRIVERS
+M: Conor Dooley <conor@kernel.org>
+L: linux-riscv@lists.infradead.org
+S: Maintained
+T: git https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git/
+F: drivers/soc/sifive/
+
SILEAD TOUCHSCREEN DRIVER
M: Hans de Goede <hdegoede@redhat.com>
L: linux-input@vger.kernel.org
S: Maintained
F: include/linux/siphash.h
F: lib/siphash.c
- F: lib/test_siphash.c
+ F: lib/siphash_kunit.c
SIS 190 ETHERNET DRIVER
M: Francois Romieu <romieu@fr.zoreil.com>
F: include/video/sisfb.h
SIS I2C TOUCHSCREEN DRIVER
-M: Mika Penttilä <mika.penttila@nextfour.com>
+M: Mika Penttilä <mpenttil@redhat.com>
L: linux-input@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/input/touchscreen/sis_i2c.txt
M: Ilias Apalodimas <ilias.apalodimas@linaro.org>
L: netdev@vger.kernel.org
S: Maintained
-F: Documentation/devicetree/bindings/net/socionext-netsec.txt
+F: Documentation/devicetree/bindings/net/socionext,synquacer-netsec.yaml
F: drivers/net/ethernet/socionext/netsec.c
SOCIONEXT (SNI) Synquacer SPI DRIVER
M: Jassi Brar <jaswinder.singh@linaro.org>
L: linux-spi@vger.kernel.org
S: Maintained
-F: Documentation/devicetree/bindings/spi/spi-synquacer.txt
+F: Documentation/devicetree/bindings/spi/socionext,synquacer-spi.yaml
F: drivers/spi/spi-synquacer.c
SOCIONEXT SYNQUACER I2C DRIVER
L: linux-media@vger.kernel.org
S: Maintained
T: git git://linuxtv.org/media_tree.git
-F: Documentation/devicetree/bindings/media/i2c/imx290.txt
+F: Documentation/devicetree/bindings/media/i2c/sony,imx290.yaml
F: drivers/media/i2c/imx290.c
SONY IMX319 SENSOR DRIVER
Q: http://patchwork.linuxtv.org/project/linux-media/list/
F: drivers/media/dvb-frontends/sp2*
+SPANISH DOCUMENTATION
+M: Carlos Bilbao <carlos.bilbao@amd.com>
+S: Maintained
+F: Documentation/translations/sp_SP/
+
SPARC + UltraSPARC (sparc/sparc64)
M: "David S. Miller" <davem@davemloft.net>
L: sparclinux@vger.kernel.org
L: linux-media@vger.kernel.org
S: Maintained
T: git git://linuxtv.org/media_tree.git
-F: Documentation/devicetree/bindings/media/i2c/st,st-mipid02.txt
+F: Documentation/devicetree/bindings/media/i2c/st,st-mipid02.yaml
F: drivers/media/i2c/st-mipid02.c
ST STM32 I2C/SMBUS DRIVER
F: Documentation/hwmon/stpddc60.rst
F: drivers/hwmon/pmbus/stpddc60.c
+ST VGXY61 DRIVER
+M: Benjamin Mugnier <benjamin.mugnier@foss.st.com>
+M: Sylvain Petinot <sylvain.petinot@foss.st.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/st,st-vgxy61.yaml
+F: Documentation/userspace-api/media/drivers/st-vgxy61.rst
+F: drivers/media/i2c/st-vgxy61.c
+
ST VL53L0X ToF RANGER(I2C) IIO DRIVER
M: Song Qiang <songqiang1304521@gmail.com>
L: linux-iio@vger.kernel.org
F: Documentation/process/stable-kernel-rules.rst
STAGING - ATOMISP DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
M: Mauro Carvalho Chehab <mchehab@kernel.org>
R: Sakari Ailus <sakari.ailus@linux.intel.com>
L: linux-media@vger.kernel.org
S: Odd Fixes
F: drivers/net/ethernet/adaptec/starfire*
+STARFIVE DEVICETREES
+M: Emil Renner Berthing <kernel@esmil.dk>
+S: Maintained
+F: arch/riscv/boot/dts/starfive/
+
STARFIVE JH7100 CLOCK DRIVERS
M: Emil Renner Berthing <kernel@esmil.dk>
S: Maintained
F: Documentation/devicetree/bindings/net/sunplus,sp7021-emac.yaml
F: drivers/net/ethernet/sunplus/
+SUNPLUS MMC DRIVER
+M: Tony Huang <tonyhuang.sunplus@gmail.com>
+M: Li-hao Kuo <lhjeff911@gmail.com>
+S: Maintained
+F: Documentation/devicetree/bindings/mmc/sunplus,mmc.yaml
+F: drivers/mmc/host/sunplus-mmc.c
+
SUNPLUS OCOTP DRIVER
M: Vincent Shih <vincent.sunplus@gmail.com>
S: Maintained
F: drivers/cpufreq/sc[mp]i-cpufreq.c
F: drivers/firmware/arm_scmi/
F: drivers/firmware/arm_scpi.c
+F: drivers/powercap/arm_scmi_powercap.c
F: drivers/regulator/scmi-regulator.c
F: drivers/reset/reset-scmi.c
F: include/linux/sc[mp]i_protocol.h
M: Max Filippov <jcmvbkbc@gmail.com>
L: linux-xtensa@linux-xtensa.org
S: Maintained
-T: git git://github.com/czankel/xtensa-linux.git
+T: git https://github.com/jcmvbkbc/linux-xtensa.git
F: arch/xtensa/
F: drivers/irqchip/irq-xtensa-*
W: https://wireless.wiki.kernel.org/en/users/Drivers/wl1251
T: git git://git.kernel.org/pub/scm/linux/kernel/git/luca/wl12xx.git
F: drivers/net/wireless/ti/
-F: include/linux/wl12xx.h
TIMEKEEPING, CLOCKSOURCE CORE, NTP, ALARMTIMER
M: John Stultz <jstultz@google.com>
F: Documentation/usb/ehci.rst
F: drivers/usb/host/ehci*
-USB GADGET/PERIPHERAL SUBSYSTEM
-M: Felipe Balbi <balbi@kernel.org>
-L: linux-usb@vger.kernel.org
-S: Maintained
-W: http://www.linux-usb.org/gadget
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git
-F: drivers/usb/gadget/
-F: include/linux/usb/gadget*
-
USB HID/HIDBP DRIVERS (USB KEYBOARDS, MICE, REMOTE CONTROLS, ...)
M: Jiri Kosina <jikos@kernel.org>
M: Benjamin Tissoires <benjamin.tissoires@redhat.com>
L: netdev@vger.kernel.org
S: Maintained
W: https://github.com/petkan/pegasus
-T: git git://github.com/petkan/pegasus.git
+T: git https://github.com/petkan/pegasus.git
F: drivers/net/usb/pegasus.*
-USB PHY LAYER
-M: Felipe Balbi <balbi@kernel.org>
-L: linux-usb@vger.kernel.org
-S: Maintained
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git
-F: drivers/usb/phy/
-
USB PRINTER DRIVER (usblp)
M: Pete Zaitcev <zaitcev@redhat.com>
L: linux-usb@vger.kernel.org
L: netdev@vger.kernel.org
S: Maintained
W: https://github.com/petkan/rtl8150
-T: git git://github.com/petkan/rtl8150.git
+T: git https://github.com/petkan/rtl8150.git
F: drivers/net/usb/rtl8150.c
USB SERIAL SUBSYSTEM
F: include/uapi/linux/virtio_*.h
F: tools/virtio/
+VISL VIRTUAL STATELESS DECODER DRIVER
+M: Daniel Almeida <daniel.almeida@collabora.com>
+L: linux-media@vger.kernel.org
+S: Supported
+F: drivers/media/test-drivers/visl
+
IFCVF VIRTIO DATA PATH ACCELERATOR
R: Zhu Lingshan <lingshan.zhu@intel.com>
F: drivers/vdpa/ifcvf/
F: drivers/watchdog/
F: include/linux/watchdog.h
F: include/uapi/linux/watchdog.h
+F: include/trace/events/watchdog.h
WHISKEYCOVE PMIC GPIO DRIVER
M: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
W: http://mjpeg.sourceforge.net/driver-zoran/
Q: https://patchwork.linuxtv.org/project/linux-media/list/
F: Documentation/driver-api/media/drivers/zoran.rst
-F: drivers/staging/media/zoran/
+F: drivers/media/pci/zoran/
ZRAM COMPRESSED RAM BLOCK DEVICE DRVIER
M: Minchan Kim <minchan@kernel.org>
VERSION = 6
PATCHLEVEL = 1
SUBLEVEL = 0
-EXTRAVERSION = -rc1
+EXTRAVERSION =
NAME = Hurr durr I'ma ninja sloth
# *DOCUMENTATION*
KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
-fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
-Werror=implicit-function-declaration -Werror=implicit-int \
- -Werror=return-type -Wno-format-security \
+ -Werror=return-type -Wno-format-security -funsigned-char \
-std=gnu11
KBUILD_CPPFLAGS := -D__KERNEL__
KBUILD_RUSTFLAGS := $(rust_common_flags) \
endif
ifdef CONFIG_SHADOW_CALL_STACK
+ifndef CONFIG_DYNAMIC_SCS
CC_FLAGS_SCS := -fsanitize=shadow-call-stack
KBUILD_CFLAGS += $(CC_FLAGS_SCS)
+endif
export CC_FLAGS_SCS
endif
# We never want expected sections to be placed heuristically by the
# linker. All sections should be explicitly named in the linker script.
ifdef CONFIG_LD_ORPHAN_WARN
- LDFLAGS_vmlinux += --orphan-handling=warn
+ LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
endif
# Align the bit size of userspace programs with the kernel
cmd_ar_vmlinux.a = \
rm -f $@; \
$(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \
- $(AR) mPiT $$($(AR) t $@ | head -n1) $@ $$($(AR) t $@ | grep -F --file=$(srctree)/scripts/head-object-list.txt)
+ $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
targets += vmlinux.a
vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt autoksyms_recursive FORCE
# Documentation targets
# ---------------------------------------------------------------------------
DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
- linkcheckdocs dochelp refcheckdocs
+ linkcheckdocs dochelp refcheckdocs texinfodocs infodocs
PHONY += $(DOC_TARGETS)
$(DOC_TARGETS):
$(Q)$(MAKE) $(build)=Documentation $@
@find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
\( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \
-o -name '*.ko.*' \
- -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
+ -o -name '*.dtb' -o -name '*.dtbo' \
+ -o -name '*.dtb.S' -o -name '*.dtbo.S' \
+ -o -name '*.dt.yaml' \
-o -name '*.dwo' -o -name '*.lst' \
-o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
+UBSAN_SANITIZE := n
#
# Architecture dependencies
LDFLAGS_vmlinux += -X
# Report orphan sections
ifdef CONFIG_LD_ORPHAN_WARN
- LDFLAGS_vmlinux += --orphan-handling=warn
+ LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
endif
# Next argument is a linker script
LDFLAGS_vmlinux += -T
$(obj)/piggy.o: $(obj)/piggy_data
CFLAGS_font.o := -Dstatic=
-AFLAGS_hyp-stub.o := -Wa,-march=armv7-a
# address by the bootloader.
LDFLAGS_vmlinux := -pie $(call ld-option, --no-dynamic-linker)
ifdef CONFIG_LD_ORPHAN_WARN
- LDFLAGS_vmlinux += --orphan-handling=warn
+ LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
endif
LDFLAGS_vmlinux += -z noexecstack
ifeq ($(CONFIG_LD_IS_BFD),y)
ifdef CONFIG_X86_64
vmlinux-objs-y += $(obj)/ident_map_64.o
vmlinux-objs-y += $(obj)/idt_64.o $(obj)/idt_handlers_64.o
- vmlinux-objs-y += $(obj)/mem_encrypt.o
+ vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT) += $(obj)/mem_encrypt.o
vmlinux-objs-y += $(obj)/pgtable_64.o
vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT) += $(obj)/sev.o
endif
vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o
vmlinux-objs-$(CONFIG_INTEL_TDX_GUEST) += $(obj)/tdx.o $(obj)/tdcall.o
-vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_thunk_$(BITS).o
vmlinux-objs-$(CONFIG_EFI) += $(obj)/efi.o
-efi-obj-$(CONFIG_EFI_STUB) = $(objtree)/drivers/firmware/efi/libstub/lib.a
+vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_mixed.o
+vmlinux-objs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
-$(obj)/vmlinux: $(vmlinux-objs-y) $(efi-obj-y) FORCE
+$(obj)/vmlinux: $(vmlinux-objs-y) FORCE
$(call if_changed,ld)
OBJCOPYFLAGS_vmlinux.bin := -R .comment -S
DRM_DEBUG_DRIVER("\n");
- memcpy(&dvo->mode, mode, sizeof(struct drm_display_mode));
+ drm_mode_copy(&dvo->mode, mode);
/* According to the path used (main or aux), the dvo clocks should
* have a different parent clock. */
#define CLK_TOLERANCE_HZ 50
- static int sti_dvo_connector_mode_valid(struct drm_connector *connector,
- struct drm_display_mode *mode)
+ static enum drm_mode_status
+ sti_dvo_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
{
int target = mode->clock * 1000;
int target_min = target - CLK_TOLERANCE_HZ;
DRM_DEBUG_DRIVER("\n");
- memcpy(&hda->mode, mode, sizeof(struct drm_display_mode));
+ drm_mode_copy(&hda->mode, mode);
if (!hda_get_mode_idx(hda->mode, &mode_idx)) {
DRM_ERROR("Undefined mode\n");
#define CLK_TOLERANCE_HZ 50
- static int sti_hda_connector_mode_valid(struct drm_connector *connector,
- struct drm_display_mode *mode)
+ static enum drm_mode_status
+ sti_hda_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
{
int target = mode->clock * 1000;
int target_min = target - CLK_TOLERANCE_HZ;
DRM_DEBUG_DRIVER("\n");
/* Copy the drm display mode in the connector local structure */
- memcpy(&hdmi->mode, mode, sizeof(struct drm_display_mode));
+ drm_mode_copy(&hdmi->mode, mode);
/* Update clock framerate according to the selected mode */
ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000);
#define CLK_TOLERANCE_HZ 50
- static int sti_hdmi_connector_mode_valid(struct drm_connector *connector,
- struct drm_display_mode *mode)
+ static enum drm_mode_status
+ sti_hdmi_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
{
int target = mode->clock * 1000;
int target_min = target - CLK_TOLERANCE_HZ;
#include "compression.h"
#include "xattr.h"
#include "print-tree.h"
+#include "accessors.h"
+#include "dir-item.h"
+#include "file-item.h"
+#include "ioctl.h"
+#include "verity.h"
/*
* Maximum number of references an extent can have in order for us to attempt to
* avoid hitting limitations of the backreference walking code (taking a lot of
* time and using too much memory for extents with large number of references).
*/
-#define SEND_MAX_EXTENT_REFS 64
+#define SEND_MAX_EXTENT_REFS 1024
/*
* A fs_path is a helper to dynamically build path names with unknown size.
struct btrfs_root *root;
u64 ino;
u64 offset;
-
- u64 found_refs;
+ u64 num_bytes;
+ bool found_ref;
};
#define SEND_CTX_MAX_NAME_CACHE_SIZE 128
#define SEND_CTX_NAME_CACHE_CLEAN_SIZE (SEND_CTX_MAX_NAME_CACHE_SIZE * 2)
+/*
+ * Limit the root_ids array of struct backref_cache_entry to 12 elements.
+ * This makes the size of a cache entry to be exactly 128 bytes on x86_64.
+ * The most common case is to have a single root for cloning, which corresponds
+ * to the send root. Having the user specify more than 11 clone roots is not
+ * common, and in such rare cases we simply don't use caching if the number of
+ * cloning roots that lead down to a leaf is more than 12.
+ */
+#define SEND_MAX_BACKREF_CACHE_ROOTS 12
+
+/*
+ * Max number of entries in the cache.
+ * With SEND_MAX_BACKREF_CACHE_ROOTS as 12, the size in bytes, excluding
+ * maple tree's internal nodes, is 16K.
+ */
+#define SEND_MAX_BACKREF_CACHE_SIZE 128
+
+/*
+ * A backref cache entry maps a leaf to a list of IDs of roots from which the
+ * leaf is accessible and we can use for clone operations.
+ * With SEND_MAX_BACKREF_CACHE_ROOTS as 12, each cache entry is 128 bytes (on
+ * x86_64).
+ */
+struct backref_cache_entry {
+ /* List to link to the cache's lru list. */
+ struct list_head list;
+ /* The key for this entry in the cache. */
+ u64 key;
+ u64 root_ids[SEND_MAX_BACKREF_CACHE_ROOTS];
+ /* Number of valid elements in the root_ids array. */
+ int num_roots;
+};
+
struct send_ctx {
struct file *send_filp;
loff_t send_off;
struct rb_root rbtree_new_refs;
struct rb_root rbtree_deleted_refs;
+
+ struct {
+ u64 last_reloc_trans;
+ struct list_head lru_list;
+ struct maple_tree entries;
+ /* Number of entries stored in the cache. */
+ int size;
+ } backref_cache;
};
struct pending_dir_move {
switch (sctx->proto) {
case 1: return cmd <= BTRFS_SEND_C_MAX_V1;
case 2: return cmd <= BTRFS_SEND_C_MAX_V2;
+ case 3: return cmd <= BTRFS_SEND_C_MAX_V3;
default: return false;
}
}
old_buf_len = p->buf_len;
/*
+ * Allocate to the next largest kmalloc bucket size, to let
+ * the fast path happen most of the time.
+ */
+ len = kmalloc_size_roundup(len);
+ /*
* First time the inline_buf does not suffice
*/
if (p->buf == p->inline_buf) {
if (!tmp_buf)
return -ENOMEM;
p->buf = tmp_buf;
- /*
- * The real size of the buffer is bigger, this will let the fast path
- * happen most of the time
- */
- p->buf_len = ksize(p->buf);
+ p->buf_len = len;
if (p->reversed) {
tmp_buf = p->buf + old_buf_len - path_len - 1;
data_len = btrfs_dir_data_len(eb, di);
btrfs_dir_item_key_to_cpu(eb, di, &di_key);
- if (btrfs_dir_type(eb, di) == BTRFS_FT_XATTR) {
+ if (btrfs_dir_ftype(eb, di) == BTRFS_FT_XATTR) {
if (name_len > XATTR_NAME_MAX) {
ret = -ENAMETOOLONG;
goto out;
/* may be truncated in case it's the last extent in a file */
u64 extent_len;
- /* Just to check for bugs in backref resolving */
- int found_itself;
+ /* The bytenr the file extent item we are processing refers to. */
+ u64 bytenr;
+ /* The owner (root id) of the data backref for the current extent. */
+ u64 backref_owner;
+ /* The offset of the data backref for the current extent. */
+ u64 backref_offset;
};
static int __clone_root_cmp_bsearch(const void *key, const void *elt)
/*
* Called for every backref that is found for the current extent.
- * Results are collected in sctx->clone_roots->ino/offset/found_refs
+ * Results are collected in sctx->clone_roots->ino/offset.
*/
-static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_)
+static int iterate_backrefs(u64 ino, u64 offset, u64 num_bytes, u64 root_id,
+ void *ctx_)
{
struct backref_ctx *bctx = ctx_;
- struct clone_root *found;
+ struct clone_root *clone_root;
/* First check if the root is in the list of accepted clone sources */
- found = bsearch((void *)(uintptr_t)root, bctx->sctx->clone_roots,
- bctx->sctx->clone_roots_cnt,
- sizeof(struct clone_root),
- __clone_root_cmp_bsearch);
- if (!found)
+ clone_root = bsearch((void *)(uintptr_t)root_id, bctx->sctx->clone_roots,
+ bctx->sctx->clone_roots_cnt,
+ sizeof(struct clone_root),
+ __clone_root_cmp_bsearch);
+ if (!clone_root)
return 0;
- if (found->root == bctx->sctx->send_root &&
+ /* This is our own reference, bail out as we can't clone from it. */
+ if (clone_root->root == bctx->sctx->send_root &&
ino == bctx->cur_objectid &&
- offset == bctx->cur_offset) {
- bctx->found_itself = 1;
- }
+ offset == bctx->cur_offset)
+ return 0;
/*
* Make sure we don't consider clones from send_root that are
* behind the current inode/offset.
*/
- if (found->root == bctx->sctx->send_root) {
+ if (clone_root->root == bctx->sctx->send_root) {
/*
* If the source inode was not yet processed we can't issue a
* clone operation, as the source extent does not exist yet at
}
bctx->found++;
- found->found_refs++;
- if (ino < found->ino) {
- found->ino = ino;
- found->offset = offset;
- } else if (found->ino == ino) {
+ clone_root->found_ref = true;
+
+ /*
+ * If the given backref refers to a file extent item with a larger
+ * number of bytes than what we found before, use the new one so that
+ * we clone more optimally and end up doing less writes and getting
+ * less exclusive, non-shared extents at the destination.
+ */
+ if (num_bytes > clone_root->num_bytes) {
+ clone_root->ino = ino;
+ clone_root->offset = offset;
+ clone_root->num_bytes = num_bytes;
+
+ /*
+ * Found a perfect candidate, so there's no need to continue
+ * backref walking.
+ */
+ if (num_bytes >= bctx->extent_len)
+ return BTRFS_ITERATE_EXTENT_INODES_STOP;
+ }
+
+ return 0;
+}
+
+static void empty_backref_cache(struct send_ctx *sctx)
+{
+ struct backref_cache_entry *entry;
+ struct backref_cache_entry *tmp;
+
+ list_for_each_entry_safe(entry, tmp, &sctx->backref_cache.lru_list, list)
+ kfree(entry);
+
+ INIT_LIST_HEAD(&sctx->backref_cache.lru_list);
+ mtree_destroy(&sctx->backref_cache.entries);
+ sctx->backref_cache.size = 0;
+}
+
+static bool lookup_backref_cache(u64 leaf_bytenr, void *ctx,
+ const u64 **root_ids_ret, int *root_count_ret)
+{
+ struct backref_ctx *bctx = ctx;
+ struct send_ctx *sctx = bctx->sctx;
+ struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
+ const u64 key = leaf_bytenr >> fs_info->sectorsize_bits;
+ struct backref_cache_entry *entry;
+
+ if (sctx->backref_cache.size == 0)
+ return false;
+
+ /*
+ * If relocation happened since we first filled the cache, then we must
+ * empty the cache and can not use it, because even though we operate on
+ * read-only roots, their leaves and nodes may have been reallocated and
+ * now be used for different nodes/leaves of the same tree or some other
+ * tree.
+ *
+ * We are called from iterate_extent_inodes() while either holding a
+ * transaction handle or holding fs_info->commit_root_sem, so no need
+ * to take any lock here.
+ */
+ if (fs_info->last_reloc_trans > sctx->backref_cache.last_reloc_trans) {
+ empty_backref_cache(sctx);
+ return false;
+ }
+
+ entry = mtree_load(&sctx->backref_cache.entries, key);
+ if (!entry)
+ return false;
+
+ *root_ids_ret = entry->root_ids;
+ *root_count_ret = entry->num_roots;
+ list_move_tail(&entry->list, &sctx->backref_cache.lru_list);
+
+ return true;
+}
+
+static void store_backref_cache(u64 leaf_bytenr, const struct ulist *root_ids,
+ void *ctx)
+{
+ struct backref_ctx *bctx = ctx;
+ struct send_ctx *sctx = bctx->sctx;
+ struct btrfs_fs_info *fs_info = sctx->send_root->fs_info;
+ struct backref_cache_entry *new_entry;
+ struct ulist_iterator uiter;
+ struct ulist_node *node;
+ int ret;
+
+ /*
+ * We're called while holding a transaction handle or while holding
+ * fs_info->commit_root_sem (at iterate_extent_inodes()), so must do a
+ * NOFS allocation.
+ */
+ new_entry = kmalloc(sizeof(struct backref_cache_entry), GFP_NOFS);
+ /* No worries, cache is optional. */
+ if (!new_entry)
+ return;
+
+ new_entry->key = leaf_bytenr >> fs_info->sectorsize_bits;
+ new_entry->num_roots = 0;
+ ULIST_ITER_INIT(&uiter);
+ while ((node = ulist_next(root_ids, &uiter)) != NULL) {
+ const u64 root_id = node->val;
+ struct clone_root *root;
+
+ root = bsearch((void *)(uintptr_t)root_id, sctx->clone_roots,
+ sctx->clone_roots_cnt, sizeof(struct clone_root),
+ __clone_root_cmp_bsearch);
+ if (!root)
+ continue;
+
+ /* Too many roots, just exit, no worries as caching is optional. */
+ if (new_entry->num_roots >= SEND_MAX_BACKREF_CACHE_ROOTS) {
+ kfree(new_entry);
+ return;
+ }
+
+ new_entry->root_ids[new_entry->num_roots] = root_id;
+ new_entry->num_roots++;
+ }
+
+ /*
+ * We may have not added any roots to the new cache entry, which means
+ * none of the roots is part of the list of roots from which we are
+ * allowed to clone. Cache the new entry as it's still useful to avoid
+ * backref walking to determine which roots have a path to the leaf.
+ */
+
+ if (sctx->backref_cache.size >= SEND_MAX_BACKREF_CACHE_SIZE) {
+ struct backref_cache_entry *lru_entry;
+ struct backref_cache_entry *mt_entry;
+
+ lru_entry = list_first_entry(&sctx->backref_cache.lru_list,
+ struct backref_cache_entry, list);
+ mt_entry = mtree_erase(&sctx->backref_cache.entries, lru_entry->key);
+ ASSERT(mt_entry == lru_entry);
+ list_del(&mt_entry->list);
+ kfree(mt_entry);
+ sctx->backref_cache.size--;
+ }
+
+ ret = mtree_insert(&sctx->backref_cache.entries, new_entry->key,
+ new_entry, GFP_NOFS);
+ ASSERT(ret == 0 || ret == -ENOMEM);
+ if (ret) {
+ /* Caching is optional, no worries. */
+ kfree(new_entry);
+ return;
+ }
+
+ list_add_tail(&new_entry->list, &sctx->backref_cache.lru_list);
+
+ /*
+ * We are called from iterate_extent_inodes() while either holding a
+ * transaction handle or holding fs_info->commit_root_sem, so no need
+ * to take any lock here.
+ */
+ if (sctx->backref_cache.size == 0)
+ sctx->backref_cache.last_reloc_trans = fs_info->last_reloc_trans;
+
+ sctx->backref_cache.size++;
+}
+
+static int check_extent_item(u64 bytenr, const struct btrfs_extent_item *ei,
+ const struct extent_buffer *leaf, void *ctx)
+{
+ const u64 refs = btrfs_extent_refs(leaf, ei);
+ const struct backref_ctx *bctx = ctx;
+ const struct send_ctx *sctx = bctx->sctx;
+
+ if (bytenr == bctx->bytenr) {
+ const u64 flags = btrfs_extent_flags(leaf, ei);
+
+ if (WARN_ON(flags & BTRFS_EXTENT_FLAG_TREE_BLOCK))
+ return -EUCLEAN;
+
/*
- * same extent found more then once in the same file.
+ * If we have only one reference and only the send root as a
+ * clone source - meaning no clone roots were given in the
+ * struct btrfs_ioctl_send_args passed to the send ioctl - then
+ * it's our reference and there's no point in doing backref
+ * walking which is expensive, so exit early.
*/
- if (found->offset > offset + bctx->extent_len)
- found->offset = offset;
+ if (refs == 1 && sctx->clone_roots_cnt == 1)
+ return -ENOENT;
}
+ /*
+ * Backreference walking (iterate_extent_inodes() below) is currently
+ * too expensive when an extent has a large number of references, both
+ * in time spent and used memory. So for now just fallback to write
+ * operations instead of clone operations when an extent has more than
+ * a certain amount of references.
+ */
+ if (refs > SEND_MAX_EXTENT_REFS)
+ return -ENOENT;
+
return 0;
}
+static bool skip_self_data_ref(u64 root, u64 ino, u64 offset, void *ctx)
+{
+ const struct backref_ctx *bctx = ctx;
+
+ if (ino == bctx->cur_objectid &&
+ root == bctx->backref_owner &&
+ offset == bctx->backref_offset)
+ return true;
+
+ return false;
+}
+
/*
* Given an inode, offset and extent item, it finds a good clone for a clone
* instruction. Returns -ENOENT when none could be found. The function makes
u64 logical;
u64 disk_byte;
u64 num_bytes;
- u64 extent_item_pos;
- u64 flags = 0;
struct btrfs_file_extent_item *fi;
struct extent_buffer *eb = path->nodes[0];
- struct backref_ctx backref_ctx = {0};
+ struct backref_ctx backref_ctx = { 0 };
+ struct btrfs_backref_walk_ctx backref_walk_ctx = { 0 };
struct clone_root *cur_clone_root;
- struct btrfs_key found_key;
- struct btrfs_path *tmp_path;
- struct btrfs_extent_item *ei;
int compressed;
u32 i;
- tmp_path = alloc_path_for_send();
- if (!tmp_path)
- return -ENOMEM;
+ /*
+ * With fallocate we can get prealloc extents beyond the inode's i_size,
+ * so we don't do anything here because clone operations can not clone
+ * to a range beyond i_size without increasing the i_size of the
+ * destination inode.
+ */
+ if (data_offset >= ino_size)
+ return 0;
- /* We only use this path under the commit sem */
- tmp_path->need_commit_sem = 0;
+ fi = btrfs_item_ptr(eb, path->slots[0], struct btrfs_file_extent_item);
+ extent_type = btrfs_file_extent_type(eb, fi);
+ if (extent_type == BTRFS_FILE_EXTENT_INLINE)
+ return -ENOENT;
- if (data_offset >= ino_size) {
- /*
- * There may be extents that lie behind the file's size.
- * I at least had this in combination with snapshotting while
- * writing large files.
- */
- ret = 0;
- goto out;
- }
+ disk_byte = btrfs_file_extent_disk_bytenr(eb, fi);
+ if (disk_byte == 0)
+ return -ENOENT;
- fi = btrfs_item_ptr(eb, path->slots[0],
- struct btrfs_file_extent_item);
- extent_type = btrfs_file_extent_type(eb, fi);
- if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
- ret = -ENOENT;
- goto out;
- }
compressed = btrfs_file_extent_compression(eb, fi);
-
num_bytes = btrfs_file_extent_num_bytes(eb, fi);
- disk_byte = btrfs_file_extent_disk_bytenr(eb, fi);
- if (disk_byte == 0) {
- ret = -ENOENT;
- goto out;
- }
logical = disk_byte + btrfs_file_extent_offset(eb, fi);
- down_read(&fs_info->commit_root_sem);
- ret = extent_from_logical(fs_info, disk_byte, tmp_path,
- &found_key, &flags);
- up_read(&fs_info->commit_root_sem);
-
- if (ret < 0)
- goto out;
- if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
- ret = -EIO;
- goto out;
- }
-
- ei = btrfs_item_ptr(tmp_path->nodes[0], tmp_path->slots[0],
- struct btrfs_extent_item);
- /*
- * Backreference walking (iterate_extent_inodes() below) is currently
- * too expensive when an extent has a large number of references, both
- * in time spent and used memory. So for now just fallback to write
- * operations instead of clone operations when an extent has more than
- * a certain amount of references.
- */
- if (btrfs_extent_refs(tmp_path->nodes[0], ei) > SEND_MAX_EXTENT_REFS) {
- ret = -ENOENT;
- goto out;
- }
- btrfs_release_path(tmp_path);
-
/*
* Setup the clone roots.
*/
cur_clone_root = sctx->clone_roots + i;
cur_clone_root->ino = (u64)-1;
cur_clone_root->offset = 0;
- cur_clone_root->found_refs = 0;
+ cur_clone_root->num_bytes = 0;
+ cur_clone_root->found_ref = false;
}
backref_ctx.sctx = sctx;
- backref_ctx.found = 0;
backref_ctx.cur_objectid = ino;
backref_ctx.cur_offset = data_offset;
- backref_ctx.found_itself = 0;
- backref_ctx.extent_len = num_bytes;
+ backref_ctx.bytenr = disk_byte;
+ /*
+ * Use the header owner and not the send root's id, because in case of a
+ * snapshot we can have shared subtrees.
+ */
+ backref_ctx.backref_owner = btrfs_header_owner(eb);
+ backref_ctx.backref_offset = data_offset - btrfs_file_extent_offset(eb, fi);
/*
* The last extent of a file may be too large due to page alignment.
* We need to adjust extent_len in this case so that the checks in
- * __iterate_backrefs work.
+ * iterate_backrefs() work.
*/
if (data_offset + num_bytes >= ino_size)
backref_ctx.extent_len = ino_size - data_offset;
+ else
+ backref_ctx.extent_len = num_bytes;
/*
* Now collect all backrefs.
*/
+ backref_walk_ctx.bytenr = disk_byte;
if (compressed == BTRFS_COMPRESS_NONE)
- extent_item_pos = logical - found_key.objectid;
- else
- extent_item_pos = 0;
- ret = iterate_extent_inodes(fs_info, found_key.objectid,
- extent_item_pos, 1, __iterate_backrefs,
- &backref_ctx, false);
+ backref_walk_ctx.extent_item_pos = btrfs_file_extent_offset(eb, fi);
+ backref_walk_ctx.fs_info = fs_info;
+ backref_walk_ctx.cache_lookup = lookup_backref_cache;
+ backref_walk_ctx.cache_store = store_backref_cache;
+ backref_walk_ctx.indirect_ref_iterator = iterate_backrefs;
+ backref_walk_ctx.check_extent_item = check_extent_item;
+ backref_walk_ctx.user_ctx = &backref_ctx;
+
+ /*
+ * If have a single clone root, then it's the send root and we can tell
+ * the backref walking code to skip our own backref and not resolve it,
+ * since we can not use it for cloning - the source and destination
+ * ranges can't overlap and in case the leaf is shared through a subtree
+ * due to snapshots, we can't use those other roots since they are not
+ * in the list of clone roots.
+ */
+ if (sctx->clone_roots_cnt == 1)
+ backref_walk_ctx.skip_data_ref = skip_self_data_ref;
+ ret = iterate_extent_inodes(&backref_walk_ctx, true, iterate_backrefs,
+ &backref_ctx);
if (ret < 0)
- goto out;
+ return ret;
down_read(&fs_info->commit_root_sem);
if (fs_info->last_reloc_trans > sctx->last_reloc_trans) {
* was already reallocated after the relocation.
*/
up_read(&fs_info->commit_root_sem);
- ret = -ENOENT;
- goto out;
+ return -ENOENT;
}
up_read(&fs_info->commit_root_sem);
- if (!backref_ctx.found_itself) {
- /* found a bug in backref code? */
- ret = -EIO;
- btrfs_err(fs_info,
- "did not find backref in send_root. inode=%llu, offset=%llu, disk_byte=%llu found extent=%llu",
- ino, data_offset, disk_byte, found_key.objectid);
- goto out;
- }
-
btrfs_debug(fs_info,
"find_extent_clone: data_offset=%llu, ino=%llu, num_bytes=%llu, logical=%llu",
data_offset, ino, num_bytes, logical);
- if (!backref_ctx.found)
+ if (!backref_ctx.found) {
btrfs_debug(fs_info, "no clones found");
+ return -ENOENT;
+ }
cur_clone_root = NULL;
for (i = 0; i < sctx->clone_roots_cnt; i++) {
- if (sctx->clone_roots[i].found_refs) {
- if (!cur_clone_root)
- cur_clone_root = sctx->clone_roots + i;
- else if (sctx->clone_roots[i].root == sctx->send_root)
- /* prefer clones from send_root over others */
- cur_clone_root = sctx->clone_roots + i;
- }
+ struct clone_root *clone_root = &sctx->clone_roots[i];
+
+ if (!clone_root->found_ref)
+ continue;
+
+ /*
+ * Choose the root from which we can clone more bytes, to
+ * minimize write operations and therefore have more extent
+ * sharing at the destination (the same as in the source).
+ */
+ if (!cur_clone_root ||
+ clone_root->num_bytes > cur_clone_root->num_bytes) {
+ cur_clone_root = clone_root;
+ /*
+ * We found an optimal clone candidate (any inode from
+ * any root is fine), so we're done.
+ */
+ if (clone_root->num_bytes >= backref_ctx.extent_len)
+ break;
+ }
}
if (cur_clone_root) {
ret = -ENOENT;
}
-out:
- btrfs_free_path(tmp_path);
return ret;
}
return -ENOMEM;
while (1) {
+ struct fscrypt_str tmp_name;
+
len = snprintf(tmp, sizeof(tmp), "o%llu-%llu-%llu",
ino, gen, idx);
ASSERT(len < sizeof(tmp));
+ tmp_name.name = tmp;
+ tmp_name.len = strlen(tmp);
di = btrfs_lookup_dir_item(NULL, sctx->send_root,
path, BTRFS_FIRST_FREE_OBJECTID,
- tmp, strlen(tmp), 0);
+ &tmp_name, 0);
btrfs_release_path(path);
if (IS_ERR(di)) {
ret = PTR_ERR(di);
di = btrfs_lookup_dir_item(NULL, sctx->parent_root,
path, BTRFS_FIRST_FREE_OBJECTID,
- tmp, strlen(tmp), 0);
+ &tmp_name, 0);
btrfs_release_path(path);
if (IS_ERR(di)) {
ret = PTR_ERR(di);
struct btrfs_dir_item *di;
struct btrfs_key key;
struct btrfs_path *path;
+ struct fscrypt_str name_str = FSTR_INIT((char *)name, name_len);
path = alloc_path_for_send();
if (!path)
return -ENOMEM;
- di = btrfs_lookup_dir_item(NULL, root, path,
- dir, name, name_len, 0);
+ di = btrfs_lookup_dir_item(NULL, root, path, dir, &name_str, 0);
if (IS_ERR_OR_NULL(di)) {
ret = di ? PTR_ERR(di) : -ENOENT;
goto out;
u64 ext_len;
u64 clone_len;
u64 clone_data_offset;
+ bool crossed_src_i_size = false;
if (slot >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(clone_root->root, path);
if (key.offset >= clone_src_i_size)
break;
- if (key.offset + ext_len > clone_src_i_size)
+ if (key.offset + ext_len > clone_src_i_size) {
ext_len = clone_src_i_size - key.offset;
+ crossed_src_i_size = true;
+ }
clone_data_offset = btrfs_file_extent_offset(leaf, ei);
if (btrfs_file_extent_disk_bytenr(leaf, ei) == disk_byte) {
ret = send_clone(sctx, offset, clone_len,
clone_root);
}
+ } else if (crossed_src_i_size && clone_len < len) {
+ /*
+ * If we are at i_size of the clone source inode and we
+ * can not clone from it, terminate the loop. This is
+ * to avoid sending two write operations, one with a
+ * length matching clone_len and the final one after
+ * this loop with a length of len - clone_len.
+ *
+ * When using encoded writes (BTRFS_SEND_FLAG_COMPRESSED
+ * was passed to the send ioctl), this helps avoid
+ * sending an encoded write for an offset that is not
+ * sector size aligned, in case the i_size of the source
+ * inode is not sector size aligned. That will make the
+ * receiver fallback to decompression of the data and
+ * writing it using regular buffered IO, therefore while
+ * not incorrect, it's not optimal due decompression and
+ * possible re-compression at the receiver.
+ */
+ break;
} else {
ret = send_extent_data(sctx, dst_path, offset,
clone_len);
if (ret < 0)
goto out;
}
- if (sctx->cur_inode_needs_verity) {
+
+ if (proto_cmd_ok(sctx, BTRFS_SEND_C_ENABLE_VERITY)
+ && sctx->cur_inode_needs_verity) {
ret = process_verity(sctx);
if (ret < 0)
goto out;
/*
* First, process the inode as if it was deleted.
*/
- sctx->cur_inode_gen = right_gen;
- sctx->cur_inode_new = false;
- sctx->cur_inode_deleted = true;
- sctx->cur_inode_size = btrfs_inode_size(
- sctx->right_path->nodes[0], right_ii);
- sctx->cur_inode_mode = btrfs_inode_mode(
- sctx->right_path->nodes[0], right_ii);
- ret = process_all_refs(sctx,
- BTRFS_COMPARE_TREE_DELETED);
- if (ret < 0)
- goto out;
+ if (old_nlinks > 0) {
+ sctx->cur_inode_gen = right_gen;
+ sctx->cur_inode_new = false;
+ sctx->cur_inode_deleted = true;
+ sctx->cur_inode_size = btrfs_inode_size(
+ sctx->right_path->nodes[0], right_ii);
+ sctx->cur_inode_mode = btrfs_inode_mode(
+ sctx->right_path->nodes[0], right_ii);
+ ret = process_all_refs(sctx,
+ BTRFS_COMPARE_TREE_DELETED);
+ if (ret < 0)
+ goto out;
+ }
/*
* Now process the inode as if it was new.
INIT_RADIX_TREE(&sctx->name_cache, GFP_KERNEL);
INIT_LIST_HEAD(&sctx->name_cache_list);
+ INIT_LIST_HEAD(&sctx->backref_cache.lru_list);
+ mt_init(&sctx->backref_cache.entries);
+
sctx->flags = arg->flags;
if (arg->flags & BTRFS_SEND_FLAG_VERSION) {
if (sctx->proto >= 2) {
u32 send_buf_num_pages;
- sctx->send_max_size = ALIGN(SZ_16K + BTRFS_MAX_COMPRESSED, PAGE_SIZE);
+ sctx->send_max_size = BTRFS_SEND_BUF_SIZE_V2;
sctx->send_buf = vmalloc(sctx->send_max_size);
if (!sctx->send_buf) {
ret = -ENOMEM;
close_current_inode(sctx);
+ empty_backref_cache(sctx);
+
kfree(sctx);
}
#include <linux/string.h>
#include <linux/keyctl.h>
#include <linux/key-type.h>
+#include <uapi/linux/posix_acl.h>
+#include <linux/posix_acl.h>
+#include <linux/posix_acl_xattr.h>
#include <keys/user-type.h>
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "fs_context.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
/* security id for everyone/world system group */
static const struct cifs_sid sid_everyone = {
* this is used to prevent malicious redirections from being installed
* with add_key().
*/
- cred = prepare_kernel_cred(NULL);
+ cred = prepare_kernel_cred(&init_task);
if (!cred)
return -ENOMEM;
kfree(pntsd);
return rc;
}
+
+struct posix_acl *cifs_get_acl(struct user_namespace *mnt_userns,
+ struct dentry *dentry, int type)
+{
+#if defined(CONFIG_CIFS_ALLOW_INSECURE_LEGACY) && defined(CONFIG_CIFS_POSIX)
+ struct posix_acl *acl = NULL;
+ ssize_t rc = -EOPNOTSUPP;
+ unsigned int xid;
+ struct super_block *sb = dentry->d_sb;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+ struct tcon_link *tlink;
+ struct cifs_tcon *pTcon;
+ const char *full_path;
+ void *page;
+
+ tlink = cifs_sb_tlink(cifs_sb);
+ if (IS_ERR(tlink))
+ return ERR_CAST(tlink);
+ pTcon = tlink_tcon(tlink);
+
+ xid = get_xid();
+ page = alloc_dentry_path();
+
+ full_path = build_path_from_dentry(dentry, page);
+ if (IS_ERR(full_path)) {
+ acl = ERR_CAST(full_path);
+ goto out;
+ }
+
+ /* return alt name if available as pseudo attr */
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ if (sb->s_flags & SB_POSIXACL)
+ rc = cifs_do_get_acl(xid, pTcon, full_path, &acl,
+ ACL_TYPE_ACCESS,
+ cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+ break;
+
+ case ACL_TYPE_DEFAULT:
+ if (sb->s_flags & SB_POSIXACL)
+ rc = cifs_do_get_acl(xid, pTcon, full_path, &acl,
+ ACL_TYPE_DEFAULT,
+ cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+ break;
+ }
+
+ if (rc < 0) {
+ if (rc == -EINVAL)
+ acl = ERR_PTR(-EOPNOTSUPP);
+ else
+ acl = ERR_PTR(rc);
+ }
+
+out:
+ free_dentry_path(page);
+ free_xid(xid);
+ cifs_put_tlink(tlink);
+ return acl;
+#else
+ return ERR_PTR(-EOPNOTSUPP);
+#endif
+}
+
+int cifs_set_acl(struct user_namespace *mnt_userns, struct dentry *dentry,
+ struct posix_acl *acl, int type)
+{
+#if defined(CONFIG_CIFS_ALLOW_INSECURE_LEGACY) && defined(CONFIG_CIFS_POSIX)
+ int rc = -EOPNOTSUPP;
+ unsigned int xid;
+ struct super_block *sb = dentry->d_sb;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+ struct tcon_link *tlink;
+ struct cifs_tcon *pTcon;
+ const char *full_path;
+ void *page;
+
+ tlink = cifs_sb_tlink(cifs_sb);
+ if (IS_ERR(tlink))
+ return PTR_ERR(tlink);
+ pTcon = tlink_tcon(tlink);
+
+ xid = get_xid();
+ page = alloc_dentry_path();
+
+ full_path = build_path_from_dentry(dentry, page);
+ if (IS_ERR(full_path)) {
+ rc = PTR_ERR(full_path);
+ goto out;
+ }
+
+ if (!acl)
+ goto out;
+
+ /* return dos attributes as pseudo xattr */
+ /* return alt name if available as pseudo attr */
+
+ /* if proc/fs/cifs/streamstoxattr is set then
+ search server for EAs or streams to
+ returns as xattrs */
+ if (posix_acl_xattr_size(acl->a_count) > CIFSMaxBufSize) {
+ cifs_dbg(FYI, "size of EA value too large\n");
+ rc = -EOPNOTSUPP;
+ goto out;
+ }
+
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ if (sb->s_flags & SB_POSIXACL)
+ rc = cifs_do_set_acl(xid, pTcon, full_path, acl,
+ ACL_TYPE_ACCESS,
+ cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+ break;
+
+ case ACL_TYPE_DEFAULT:
+ if (sb->s_flags & SB_POSIXACL)
+ rc = cifs_do_set_acl(xid, pTcon, full_path, acl,
+ ACL_TYPE_DEFAULT,
+ cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+ break;
+ }
+
+out:
+ free_dentry_path(page);
+ free_xid(xid);
+ cifs_put_tlink(tlink);
+ return rc;
+#else
+ return -EOPNOTSUPP;
+#endif
+}
static int expand_corename(struct core_name *cn, int size)
{
- char *corename = krealloc(cn->corename, size, GFP_KERNEL);
+ char *corename;
+
+ size = kmalloc_size_roundup(size);
+ corename = krealloc(cn->corename, size, GFP_KERNEL);
if (!corename)
return -ENOMEM;
if (size > core_name_size) /* racy but harmless */
core_name_size = size;
- cn->size = ksize(corename);
+ cn->size = size;
cn->corename = corename;
return 0;
}
err = cn_printf(cn, "%lu",
rlimit(RLIMIT_CORE));
break;
+ /* CPU the task ran on */
+ case 'C':
+ err = cn_printf(cn, "%d", cprm->cpu);
+ break;
default:
break;
}
static atomic_t core_dump_count = ATOMIC_INIT(0);
struct coredump_params cprm = {
.siginfo = siginfo,
- .regs = signal_pt_regs(),
.limit = rlimit(RLIMIT_CORE),
/*
* We must use the same mm->flags while dumping core to avoid
*/
.mm_flags = mm->flags,
.vma_meta = NULL,
+ .cpu = raw_smp_processor_id(),
};
audit_core_dumps(siginfo->si_signo);
* filesystem.
*/
mnt_userns = file_mnt_user_ns(cprm.file);
- if (!uid_eq(i_uid_into_mnt(mnt_userns, inode),
- current_fsuid())) {
+ if (!vfsuid_eq_kuid(i_uid_into_vfsuid(mnt_userns, inode),
+ current_fsuid())) {
pr_info_ratelimited("Core dump to %s aborted: cannot preserve file owner\n",
cn.corename);
goto close_fail;
if (dump_interrupted())
return 0;
pos = file->f_pos;
- iov_iter_bvec(&iter, WRITE, &bvec, 1, PAGE_SIZE);
+ iov_iter_bvec(&iter, ITER_SOURCE, &bvec, 1, PAGE_SIZE);
n = __kernel_write_iter(cprm->file, &iter, &pos);
if (n != PAGE_SIZE)
return 0;
fattr->cf_dacls = NULL;
if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
- fattr->cf_acls = get_acl(inode, ACL_TYPE_ACCESS);
+ fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
if (S_ISDIR(inode->i_mode))
- fattr->cf_dacls = get_acl(inode, ACL_TYPE_DEFAULT);
+ fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
}
}
struct inode *inode = d_inode(path.dentry);
posix_acl_rc = ksmbd_vfs_inherit_posix_acl(user_ns,
- inode,
+ path.dentry,
d_inode(path.dentry->d_parent));
if (posix_acl_rc)
ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
if (rc) {
if (posix_acl_rc)
ksmbd_vfs_set_init_posix_acl(user_ns,
- inode);
+ path.dentry);
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_ACL_XATTR)) {
goto free_conv_name;
}
- struct_sz = readdir_info_level_struct_sz(info_level) - 1 + conv_len;
+ struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
d_info->last_entry_off_align = next_entry_offset - struct_sz;
return -EOPNOTSUPP;
conv_len = (d_info->name_len + 1) * 2;
- next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
+ next_entry_offset = ALIGN(struct_sz + conv_len,
KSMBD_DIR_INFO_ALIGNMENT);
if (next_entry_offset > d_info->out_buf_len) {
* 1 Protocol"
*/
+static void encode_uint32(struct xdr_stream *xdr, u32 n)
+{
+ WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
+}
+
+static void encode_bitmap4(struct xdr_stream *xdr, const __u32 *bitmap,
+ size_t len)
+{
+ WARN_ON_ONCE(xdr_stream_encode_uint32_array(xdr, bitmap, len) < 0);
+}
+
/*
* nfs_cb_opnum4
*
}
/*
+ * CB_RECALLANY4args
+ *
+ * struct CB_RECALLANY4args {
+ * uint32_t craa_objects_to_keep;
+ * bitmap4 craa_type_mask;
+ * };
+ */
+static void
+encode_cb_recallany4args(struct xdr_stream *xdr,
+ struct nfs4_cb_compound_hdr *hdr, struct nfsd4_cb_recall_any *ra)
+{
+ encode_nfs_cb_opnum4(xdr, OP_CB_RECALL_ANY);
+ encode_uint32(xdr, ra->ra_keep);
+ encode_bitmap4(xdr, ra->ra_bmval, ARRAY_SIZE(ra->ra_bmval));
+ hdr->nops++;
+}
+
+/*
* CB_SEQUENCE4args
*
* struct CB_SEQUENCE4args {
encode_cb_nops(&hdr);
}
+/*
+ * 20.6. Operation 8: CB_RECALL_ANY - Keep Any N Recallable Objects
+ */
+static void
+nfs4_xdr_enc_cb_recall_any(struct rpc_rqst *req,
+ struct xdr_stream *xdr, const void *data)
+{
+ const struct nfsd4_callback *cb = data;
+ struct nfsd4_cb_recall_any *ra;
+ struct nfs4_cb_compound_hdr hdr = {
+ .ident = cb->cb_clp->cl_cb_ident,
+ .minorversion = cb->cb_clp->cl_minorversion,
+ };
+
+ ra = container_of(cb, struct nfsd4_cb_recall_any, ra_cb);
+ encode_cb_compound4args(xdr, &hdr);
+ encode_cb_sequence4args(xdr, cb, &hdr);
+ encode_cb_recallany4args(xdr, &hdr, ra);
+ encode_cb_nops(&hdr);
+}
/*
* NFSv4.0 and NFSv4.1 XDR decode functions
return decode_cb_op_status(xdr, OP_CB_RECALL, &cb->cb_status);
}
+/*
+ * 20.6. Operation 8: CB_RECALL_ANY - Keep Any N Recallable Objects
+ */
+static int
+nfs4_xdr_dec_cb_recall_any(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ void *data)
+{
+ struct nfsd4_callback *cb = data;
+ struct nfs4_cb_compound_hdr hdr;
+ int status;
+
+ status = decode_cb_compound4res(xdr, &hdr);
+ if (unlikely(status))
+ return status;
+ status = decode_cb_sequence4res(xdr, cb);
+ if (unlikely(status || cb->cb_seq_status))
+ return status;
+ status = decode_cb_op_status(xdr, OP_CB_RECALL_ANY, &cb->cb_status);
+ return status;
+}
+
#ifdef CONFIG_NFSD_PNFS
/*
* CB_LAYOUTRECALL4args
#endif
PROC(CB_NOTIFY_LOCK, COMPOUND, cb_notify_lock, cb_notify_lock),
PROC(CB_OFFLOAD, COMPOUND, cb_offload, cb_offload),
+ PROC(CB_RECALL_ANY, COMPOUND, cb_recall_any, cb_recall_any),
};
static unsigned int nfs4_cb_counts[ARRAY_SIZE(nfs4_cb_procedures)];
} else {
struct cred *kcred;
- kcred = prepare_kernel_cred(NULL);
+ kcred = prepare_kernel_cred(&init_task);
if (!kcred)
return NULL;
int devres_release_group(struct device *dev, void *id);
/* managed devm_k.alloc/kfree for device drivers */
- void *devm_kmalloc(struct device *dev, size_t size, gfp_t gfp) __malloc;
+ void *devm_kmalloc(struct device *dev, size_t size, gfp_t gfp) __alloc_size(2);
void *devm_krealloc(struct device *dev, void *ptr, size_t size,
- gfp_t gfp) __must_check;
+ gfp_t gfp) __must_check __realloc_size(3);
__printf(3, 0) char *devm_kvasprintf(struct device *dev, gfp_t gfp,
const char *fmt, va_list ap) __malloc;
__printf(3, 4) char *devm_kasprintf(struct device *dev, gfp_t gfp,
void devm_kfree(struct device *dev, const void *p);
char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp) __malloc;
const char *devm_kstrdup_const(struct device *dev, const char *s, gfp_t gfp);
- void *devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp);
+ void *devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp)
+ __realloc_size(3);
unsigned long devm_get_free_pages(struct device *dev,
gfp_t gfp_mask, unsigned int order);
* @data: Pointer to MSI device data
*/
struct dev_msi_info {
-#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
- struct irq_domain *domain;
-#endif
#ifdef CONFIG_GENERIC_MSI_IRQ
+ struct irq_domain *domain;
struct msi_device_data *data;
#endif
};
static inline struct irq_domain *dev_get_msi_domain(const struct device *dev)
{
-#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
+#ifdef CONFIG_GENERIC_MSI_IRQ
return dev->msi.domain;
#else
return NULL;
static inline void dev_set_msi_domain(struct device *dev, struct irq_domain *d)
{
-#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
+#ifdef CONFIG_GENERIC_MSI_IRQ
dev->msi.domain = d;
#endif
}
#define __compiletime_strlen(p) \
({ \
- unsigned char *__p = (unsigned char *)(p); \
+ char *__p = (char *)(p); \
size_t __ret = SIZE_MAX; \
size_t __p_size = __member_size(p); \
if (__p_size != SIZE_MAX && \
extern char *__underlying_strncat(char *p, const char *q, __kernel_size_t count) __RENAME(strncat);
extern char *__underlying_strncpy(char *p, const char *q, __kernel_size_t size) __RENAME(strncpy);
#else
-#define __underlying_memchr __builtin_memchr
-#define __underlying_memcmp __builtin_memcmp
+
+#if defined(__SANITIZE_MEMORY__)
+/*
+ * For KMSAN builds all memcpy/memset/memmove calls should be replaced by the
+ * corresponding __msan_XXX functions.
+ */
+#include <linux/kmsan_string.h>
+#define __underlying_memcpy __msan_memcpy
+#define __underlying_memmove __msan_memmove
+#define __underlying_memset __msan_memset
+#else
#define __underlying_memcpy __builtin_memcpy
#define __underlying_memmove __builtin_memmove
#define __underlying_memset __builtin_memset
+#endif
+
+#define __underlying_memchr __builtin_memchr
+#define __underlying_memcmp __builtin_memcmp
#define __underlying_strcat __builtin_strcat
#define __underlying_strcpy __builtin_strcpy
#define __underlying_strlen __builtin_strlen
* Instead, please choose an alternative, so that the expectation
* of @p's contents is unambiguous:
*
- * +--------------------+-----------------+------------+
- * | @p needs to be: | padded to @size | not padded |
- * +====================+=================+============+
- * | NUL-terminated | strscpy_pad() | strscpy() |
- * +--------------------+-----------------+------------+
- * | not NUL-terminated | strtomem_pad() | strtomem() |
- * +--------------------+-----------------+------------+
+ * +--------------------+--------------------+------------+
+ * | **p** needs to be: | padded to **size** | not padded |
+ * +====================+====================+============+
+ * | NUL-terminated | strscpy_pad() | strscpy() |
+ * +--------------------+--------------------+------------+
+ * | not NUL-terminated | strtomem_pad() | strtomem() |
+ * +--------------------+--------------------+------------+
*
* Note strscpy*()'s differing return values for detecting truncation,
* and strtomem*()'s expectation that the destination is marked with
return __underlying_strncpy(p, q, size);
}
+ /**
+ * strcat - Append a string to an existing string
+ *
+ * @p: pointer to NUL-terminated string to append to
+ * @q: pointer to NUL-terminated source string to append from
+ *
+ * Do not use this function. While FORTIFY_SOURCE tries to avoid
+ * read and write overflows, this is only possible when the
+ * destination buffer size is known to the compiler. Prefer
+ * building the string with formatting, via scnprintf() or similar.
+ * At the very least, use strncat().
+ *
+ * Returns @p.
+ *
+ */
__FORTIFY_INLINE __diagnose_as(__builtin_strcat, 1, 2)
char *strcat(char * const POS p, const char *q)
{
}
extern __kernel_size_t __real_strnlen(const char *, __kernel_size_t) __RENAME(strnlen);
+ /**
+ * strnlen - Return bounded count of characters in a NUL-terminated string
+ *
+ * @p: pointer to NUL-terminated string to count.
+ * @maxlen: maximum number of characters to count.
+ *
+ * Returns number of characters in @p (NOT including the final NUL), or
+ * @maxlen, if no NUL has been found up to there.
+ *
+ */
__FORTIFY_INLINE __kernel_size_t strnlen(const char * const POS p, __kernel_size_t maxlen)
{
size_t p_size = __member_size(p);
* possible for strlen() to be used on compile-time strings for use in
* static initializers (i.e. as a constant expression).
*/
+ /**
+ * strlen - Return count of characters in a NUL-terminated string
+ *
+ * @p: pointer to NUL-terminated string to count.
+ *
+ * Do not use this function unless the string length is known at
+ * compile-time. When @p is unterminated, this function may crash
+ * or return unexpected counts that could lead to memory content
+ * exposures. Prefer strnlen().
+ *
+ * Returns number of characters in @p (NOT including the final NUL).
+ *
+ */
#define strlen(p) \
__builtin_choose_expr(__is_constexpr(__builtin_strlen(p)), \
__builtin_strlen(p), __fortify_strlen(p))
return ret;
}
- /* defined after fortified strlen to reuse it */
+ /* Defined after fortified strlen() to reuse it. */
extern size_t __real_strlcpy(char *, const char *, size_t) __RENAME(strlcpy);
+ /**
+ * strlcpy - Copy a string into another string buffer
+ *
+ * @p: pointer to destination of copy
+ * @q: pointer to NUL-terminated source string to copy
+ * @size: maximum number of bytes to write at @p
+ *
+ * If strlen(@q) >= @size, the copy of @q will be truncated at
+ * @size - 1 bytes. @p will always be NUL-terminated.
+ *
+ * Do not use this function. While FORTIFY_SOURCE tries to avoid
+ * over-reads when calculating strlen(@q), it is still possible.
+ * Prefer strscpy(), though note its different return values for
+ * detecting truncation.
+ *
+ * Returns total number of bytes written to @p, including terminating NUL.
+ *
+ */
__FORTIFY_INLINE size_t strlcpy(char * const POS p, const char * const POS q, size_t size)
{
size_t p_size = __member_size(p);
return q_len;
}
- /* defined after fortified strnlen to reuse it */
+ /* Defined after fortified strnlen() to reuse it. */
extern ssize_t __real_strscpy(char *, const char *, size_t) __RENAME(strscpy);
+ /**
+ * strscpy - Copy a C-string into a sized buffer
+ *
+ * @p: Where to copy the string to
+ * @q: Where to copy the string from
+ * @size: Size of destination buffer
+ *
+ * Copy the source string @p, or as much of it as fits, into the destination
+ * @q buffer. The behavior is undefined if the string buffers overlap. The
+ * destination @p buffer is always NUL terminated, unless it's zero-sized.
+ *
+ * Preferred to strlcpy() since the API doesn't require reading memory
+ * from the source @q string beyond the specified @size bytes, and since
+ * the return value is easier to error-check than strlcpy()'s.
+ * In addition, the implementation is robust to the string changing out
+ * from underneath it, unlike the current strlcpy() implementation.
+ *
+ * Preferred to strncpy() since it always returns a valid string, and
+ * doesn't unnecessarily force the tail of the destination buffer to be
+ * zero padded. If padding is desired please use strscpy_pad().
+ *
+ * Returns the number of characters copied in @p (not including the
+ * trailing %NUL) or -E2BIG if @size is 0 or the copy of @q was truncated.
+ */
__FORTIFY_INLINE ssize_t strscpy(char * const POS p, const char * const POS q, size_t size)
{
size_t len;
if (__compiletime_lessthan(p_size, size))
__write_overflow();
+ /* Short-circuit for compile-time known-safe lengths. */
+ if (__compiletime_lessthan(p_size, SIZE_MAX)) {
+ len = __compiletime_strlen(q);
+
+ if (len < SIZE_MAX && __compiletime_lessthan(len, size)) {
+ __underlying_memcpy(p, q, len + 1);
+ return len;
+ }
+ }
+
/*
* This call protects from read overflow, because len will default to q
* length if it smaller than size.
return __real_strscpy(p, q, len);
}
- /* defined after fortified strlen and strnlen to reuse them */
+ /**
+ * strncat - Append a string to an existing string
+ *
+ * @p: pointer to NUL-terminated string to append to
+ * @q: pointer to source string to append from
+ * @count: Maximum bytes to read from @q
+ *
+ * Appends at most @count bytes from @q (stopping at the first
+ * NUL byte) after the NUL-terminated string at @p. @p will be
+ * NUL-terminated.
+ *
+ * Do not use this function. While FORTIFY_SOURCE tries to avoid
+ * read and write overflows, this is only possible when the sizes
+ * of @p and @q are known to the compiler. Prefer building the
+ * string with formatting, via scnprintf() or similar.
+ *
+ * Returns @p.
+ *
+ */
+ /* Defined after fortified strlen() and strnlen() to reuse them. */
__FORTIFY_INLINE __diagnose_as(__builtin_strncat, 1, 2, 3)
char *strncat(char * const POS p, const char * const POS q, __kernel_size_t count)
{
return __real_memchr_inv(p, c, size);
}
- extern void *__real_kmemdup(const void *src, size_t len, gfp_t gfp) __RENAME(kmemdup);
+ extern void *__real_kmemdup(const void *src, size_t len, gfp_t gfp) __RENAME(kmemdup)
+ __realloc_size(2);
__FORTIFY_INLINE void *kmemdup(const void * const POS0 p, size_t size, gfp_t gfp)
{
size_t p_size = __struct_size(p);
return __real_kmemdup(p, size, gfp);
}
+ /**
+ * strcpy - Copy a string into another string buffer
+ *
+ * @p: pointer to destination of copy
+ * @q: pointer to NUL-terminated source string to copy
+ *
+ * Do not use this function. While FORTIFY_SOURCE tries to avoid
+ * overflows, this is only possible when the sizes of @q and @p are
+ * known to the compiler. Prefer strscpy(), though note its different
+ * return values for detecting truncation.
+ *
+ * Returns @p.
+ *
+ */
/* Defined after fortified strlen to reuse it. */
__FORTIFY_INLINE __diagnose_as(__builtin_strcpy, 1, 2)
char *strcpy(char * const POS p, const char * const POS q)
This shows whether a suitable Rust toolchain is available (found).
Please see Documentation/rust/quick-start.rst for instructions on how
- to satify the build requirements of Rust support.
+ to satisfy the build requirements of Rust support.
In particular, the Makefile target 'rustavailable' is useful to check
why the Rust toolchain is not being detected.
config CC_HAS_ASM_GOTO_TIED_OUTPUT
depends on CC_HAS_ASM_GOTO_OUTPUT
# Detect buggy gcc and clang, fixed in gcc-11 clang-14.
- def_bool $(success,echo 'int foo(int *x) { asm goto (".long (%l[bar]) - .\n": "+m"(*x) ::: bar); return *x; bar: return 0; }' | $CC -x c - -c -o /dev/null)
+ def_bool $(success,echo 'int foo(int *x) { asm goto (".long (%l[bar]) - .": "+m"(*x) ::: bar); return *x; bar: return 0; }' | $CC -x c - -c -o /dev/null)
config TOOLS_SUPPORT_RELR
def_bool $(success,env "CC=$(CC)" "LD=$(LD)" "NM=$(NM)" "OBJCOPY=$(OBJCOPY)" $(srctree)/scripts/tools-support-relr.sh)
help
A kernel build should not cause any compiler warnings, and this
enables the '-Werror' (for C) and '-Dwarnings' (for Rust) flags
- to enforce that rule by default.
+ to enforce that rule by default. Certain warnings from other tools
+ such as the linker may be upgraded to errors with this option as
+ well.
- However, if you have a new (or very old) compiler with odd and
- unusual warnings, or you have some architecture with problems,
+ However, if you have a new (or very old) compiler or linker with odd
+ and unusual warnings, or you have some architecture with problems,
you may need to disable this config option in order to
successfully build the kernel.
def_bool y
depends on ARCH_WANT_LD_ORPHAN_WARN
depends on $(ld-option,--orphan-handling=warn)
+ depends on $(ld-option,--orphan-handling=error)
+
+ config LD_ORPHAN_WARN_LEVEL
+ string
+ depends on LD_ORPHAN_WARN
+ default "error" if WERROR
+ default "warn"
config SYSCTL
bool
symbolic stack backtraces. This increases the size of the kernel
somewhat, as all symbols have to be loaded into the kernel image.
+config KALLSYMS_SELFTEST
+ bool "Test the basic functions and performance of kallsyms"
+ depends on KALLSYMS
+ default n
+ help
+ Test the basic functions and performance of some interfaces, such as
+ kallsyms_lookup_name. It also calculates the compression rate of the
+ kallsyms compression algorithm for the current symbol set.
+
+ Start self-test automatically after system startup. Suggest executing
+ "dmesg | grep kallsyms_selftest" to collect test results. "finish" is
+ displayed in the last line, indicating that the test is complete.
+
config KALLSYMS_ALL
bool "Include all symbols in kallsyms"
depends on DEBUG_KERNEL && KALLSYMS
#include <linux/kexec.h>
#include <linux/panic_notifier.h>
#include <linux/sched.h>
+#include <linux/string_helpers.h>
#include <linux/sysrq.h>
#include <linux/init.h>
#include <linux/nmi.h>
#include <linux/bug.h>
#include <linux/ratelimit.h>
#include <linux/debugfs.h>
+ #include <linux/sysfs.h>
#include <trace/events/error_report.h>
#include <asm/sections.h>
int panic_on_warn __read_mostly;
unsigned long panic_on_taint;
bool panic_on_taint_nousertaint = false;
+ static unsigned int warn_limit __read_mostly;
int panic_timeout = CONFIG_PANIC_TIMEOUT;
EXPORT_SYMBOL_GPL(panic_timeout);
EXPORT_SYMBOL(panic_notifier_list);
- #if defined(CONFIG_SMP) && defined(CONFIG_SYSCTL)
+ #ifdef CONFIG_SYSCTL
static struct ctl_table kern_panic_table[] = {
+ #ifdef CONFIG_SMP
{
.procname = "oops_all_cpu_backtrace",
.data = &sysctl_oops_all_cpu_backtrace,
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE,
},
+ #endif
+ {
+ .procname = "warn_limit",
+ .data = &warn_limit,
+ .maxlen = sizeof(warn_limit),
+ .mode = 0644,
+ .proc_handler = proc_douintvec,
+ },
{ }
};
late_initcall(kernel_panic_sysctls_init);
#endif
+ static atomic_t warn_count = ATOMIC_INIT(0);
+
+ #ifdef CONFIG_SYSFS
+ static ssize_t warn_count_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *page)
+ {
+ return sysfs_emit(page, "%d\n", atomic_read(&warn_count));
+ }
+
+ static struct kobj_attribute warn_count_attr = __ATTR_RO(warn_count);
+
+ static __init int kernel_panic_sysfs_init(void)
+ {
+ sysfs_add_file_to_group(kernel_kobj, &warn_count_attr.attr, NULL);
+ return 0;
+ }
+ late_initcall(kernel_panic_sysfs_init);
+ #endif
+
static long no_blink(int state)
{
return 0;
ftrace_dump(DUMP_ALL);
}
+ void check_panic_on_warn(const char *origin)
+ {
+ if (panic_on_warn)
+ panic("%s: panic_on_warn set ...\n", origin);
+
+ if (atomic_inc_return(&warn_count) >= READ_ONCE(warn_limit) && warn_limit)
+ panic("%s: system warned too often (kernel.warn_limit is %d)",
+ origin, warn_limit);
+ }
+
/**
* panic - halt the system
* @fmt: The text string to print
if (regs)
show_regs(regs);
- if (panic_on_warn)
- panic("panic_on_warn set ...\n");
+ check_panic_on_warn("kernel");
if (!regs)
dump_stack();
if (s && !strcmp(s, "nousertaint"))
panic_on_taint_nousertaint = true;
- pr_info("panic_on_taint: bitmask=0x%lx nousertaint_mode=%sabled\n",
- panic_on_taint, panic_on_taint_nousertaint ? "en" : "dis");
+ pr_info("panic_on_taint: bitmask=0x%lx nousertaint_mode=%s\n",
+ panic_on_taint, str_enabled_disabled(panic_on_taint_nousertaint));
return 0;
}
if (!(rq->uclamp_flags & UCLAMP_FLAG_IDLE))
return;
- WRITE_ONCE(rq->uclamp[clamp_id].value, clamp_value);
+ uclamp_rq_set(rq, clamp_id, clamp_value);
}
static inline
if (bucket->tasks == 1 || uc_se->value > bucket->value)
bucket->value = uc_se->value;
- if (uc_se->value > READ_ONCE(uc_rq->value))
- WRITE_ONCE(uc_rq->value, uc_se->value);
+ if (uc_se->value > uclamp_rq_get(rq, clamp_id))
+ uclamp_rq_set(rq, clamp_id, uc_se->value);
}
/*
if (likely(bucket->tasks))
return;
- rq_clamp = READ_ONCE(uc_rq->value);
+ rq_clamp = uclamp_rq_get(rq, clamp_id);
/*
* Defensive programming: this should never happen. If it happens,
* e.g. due to future modification, warn and fixup the expected value.
SCHED_WARN_ON(bucket->value > rq_clamp);
if (bucket->value >= rq_clamp) {
bkt_clamp = uclamp_rq_max_value(rq, clamp_id, uc_se->value);
- WRITE_ONCE(uc_rq->value, bkt_clamp);
+ uclamp_rq_set(rq, clamp_id, bkt_clamp);
}
}
if (!(flags & ENQUEUE_RESTORE)) {
sched_info_enqueue(rq, p);
- psi_enqueue(p, flags & ENQUEUE_WAKEUP);
+ psi_enqueue(p, (flags & ENQUEUE_WAKEUP) && !(flags & ENQUEUE_MIGRATED));
}
uclamp_rq_inc(rq, p);
#ifdef CONFIG_SMP
static void
-__do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask, u32 flags);
+__do_set_cpus_allowed(struct task_struct *p, struct affinity_context *ctx);
static int __set_cpus_allowed_ptr(struct task_struct *p,
- const struct cpumask *new_mask,
- u32 flags);
+ struct affinity_context *ctx);
static void migrate_disable_switch(struct rq *rq, struct task_struct *p)
{
+ struct affinity_context ac = {
+ .new_mask = cpumask_of(rq->cpu),
+ .flags = SCA_MIGRATE_DISABLE,
+ };
+
if (likely(!p->migration_disabled))
return;
/*
* Violates locking rules! see comment in __do_set_cpus_allowed().
*/
- __do_set_cpus_allowed(p, cpumask_of(rq->cpu), SCA_MIGRATE_DISABLE);
+ __do_set_cpus_allowed(p, &ac);
}
void migrate_disable(void)
void migrate_enable(void)
{
struct task_struct *p = current;
+ struct affinity_context ac = {
+ .new_mask = &p->cpus_mask,
+ .flags = SCA_MIGRATE_ENABLE,
+ };
if (p->migration_disabled > 1) {
p->migration_disabled--;
*/
preempt_disable();
if (p->cpus_ptr != &p->cpus_mask)
- __set_cpus_allowed_ptr(p, &p->cpus_mask, SCA_MIGRATE_ENABLE);
+ __set_cpus_allowed_ptr(p, &ac);
/*
* Mustn't clear migration_disabled() until cpus_ptr points back at the
* regular cpus_mask, otherwise things that race (eg.
* sched_class::set_cpus_allowed must do the below, but is not required to
* actually call this function.
*/
-void set_cpus_allowed_common(struct task_struct *p, const struct cpumask *new_mask, u32 flags)
+void set_cpus_allowed_common(struct task_struct *p, struct affinity_context *ctx)
{
- if (flags & (SCA_MIGRATE_ENABLE | SCA_MIGRATE_DISABLE)) {
- p->cpus_ptr = new_mask;
+ if (ctx->flags & (SCA_MIGRATE_ENABLE | SCA_MIGRATE_DISABLE)) {
+ p->cpus_ptr = ctx->new_mask;
return;
}
- cpumask_copy(&p->cpus_mask, new_mask);
- p->nr_cpus_allowed = cpumask_weight(new_mask);
+ cpumask_copy(&p->cpus_mask, ctx->new_mask);
+ p->nr_cpus_allowed = cpumask_weight(ctx->new_mask);
+
+ /*
+ * Swap in a new user_cpus_ptr if SCA_USER flag set
+ */
+ if (ctx->flags & SCA_USER)
+ swap(p->user_cpus_ptr, ctx->user_mask);
}
static void
-__do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask, u32 flags)
+__do_set_cpus_allowed(struct task_struct *p, struct affinity_context *ctx)
{
struct rq *rq = task_rq(p);
bool queued, running;
*
* XXX do further audits, this smells like something putrid.
*/
- if (flags & SCA_MIGRATE_DISABLE)
+ if (ctx->flags & SCA_MIGRATE_DISABLE)
SCHED_WARN_ON(!p->on_cpu);
else
lockdep_assert_held(&p->pi_lock);
if (running)
put_prev_task(rq, p);
- p->sched_class->set_cpus_allowed(p, new_mask, flags);
+ p->sched_class->set_cpus_allowed(p, ctx);
if (queued)
enqueue_task(rq, p, ENQUEUE_RESTORE | ENQUEUE_NOCLOCK);
set_next_task(rq, p);
}
+/*
+ * Used for kthread_bind() and select_fallback_rq(), in both cases the user
+ * affinity (if any) should be destroyed too.
+ */
void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask)
{
- __do_set_cpus_allowed(p, new_mask, 0);
+ struct affinity_context ac = {
+ .new_mask = new_mask,
+ .user_mask = NULL,
+ .flags = SCA_USER, /* clear the user requested mask */
+ };
+
+ __do_set_cpus_allowed(p, &ac);
+ kfree(ac.user_mask);
}
int dup_user_cpus_ptr(struct task_struct *dst, struct task_struct *src,
int node)
{
+ unsigned long flags;
+
if (!src->user_cpus_ptr)
return 0;
if (!dst->user_cpus_ptr)
return -ENOMEM;
+ /* Use pi_lock to protect content of user_cpus_ptr */
+ raw_spin_lock_irqsave(&src->pi_lock, flags);
cpumask_copy(dst->user_cpus_ptr, src->user_cpus_ptr);
+ raw_spin_unlock_irqrestore(&src->pi_lock, flags);
return 0;
}
*/
static int affine_move_task(struct rq *rq, struct task_struct *p, struct rq_flags *rf,
int dest_cpu, unsigned int flags)
+ __releases(rq->lock)
+ __releases(p->pi_lock)
{
struct set_affinity_pending my_pending = { }, *pending = NULL;
bool stop_pending, complete = false;
* Called with both p->pi_lock and rq->lock held; drops both before returning.
*/
static int __set_cpus_allowed_ptr_locked(struct task_struct *p,
- const struct cpumask *new_mask,
- u32 flags,
+ struct affinity_context *ctx,
struct rq *rq,
struct rq_flags *rf)
__releases(rq->lock)
const struct cpumask *cpu_allowed_mask = task_cpu_possible_mask(p);
const struct cpumask *cpu_valid_mask = cpu_active_mask;
bool kthread = p->flags & PF_KTHREAD;
- struct cpumask *user_mask = NULL;
unsigned int dest_cpu;
int ret = 0;
cpu_valid_mask = cpu_online_mask;
}
- if (!kthread && !cpumask_subset(new_mask, cpu_allowed_mask)) {
+ if (!kthread && !cpumask_subset(ctx->new_mask, cpu_allowed_mask)) {
ret = -EINVAL;
goto out;
}
* Must re-check here, to close a race against __kthread_bind(),
* sched_setaffinity() is not guaranteed to observe the flag.
*/
- if ((flags & SCA_CHECK) && (p->flags & PF_NO_SETAFFINITY)) {
+ if ((ctx->flags & SCA_CHECK) && (p->flags & PF_NO_SETAFFINITY)) {
ret = -EINVAL;
goto out;
}
- if (!(flags & SCA_MIGRATE_ENABLE)) {
- if (cpumask_equal(&p->cpus_mask, new_mask))
+ if (!(ctx->flags & SCA_MIGRATE_ENABLE)) {
+ if (cpumask_equal(&p->cpus_mask, ctx->new_mask))
goto out;
if (WARN_ON_ONCE(p == current &&
is_migration_disabled(p) &&
- !cpumask_test_cpu(task_cpu(p), new_mask))) {
+ !cpumask_test_cpu(task_cpu(p), ctx->new_mask))) {
ret = -EBUSY;
goto out;
}
* for groups of tasks (ie. cpuset), so that load balancing is not
* immediately required to distribute the tasks within their new mask.
*/
- dest_cpu = cpumask_any_and_distribute(cpu_valid_mask, new_mask);
+ dest_cpu = cpumask_any_and_distribute(cpu_valid_mask, ctx->new_mask);
if (dest_cpu >= nr_cpu_ids) {
ret = -EINVAL;
goto out;
}
- __do_set_cpus_allowed(p, new_mask, flags);
-
- if (flags & SCA_USER)
- user_mask = clear_user_cpus_ptr(p);
-
- ret = affine_move_task(rq, p, rf, dest_cpu, flags);
-
- kfree(user_mask);
+ __do_set_cpus_allowed(p, ctx);
- return ret;
+ return affine_move_task(rq, p, rf, dest_cpu, ctx->flags);
out:
task_rq_unlock(rq, p, rf);
* call is not atomic; no spinlocks may be held.
*/
static int __set_cpus_allowed_ptr(struct task_struct *p,
- const struct cpumask *new_mask, u32 flags)
+ struct affinity_context *ctx)
{
struct rq_flags rf;
struct rq *rq;
rq = task_rq_lock(p, &rf);
- return __set_cpus_allowed_ptr_locked(p, new_mask, flags, rq, &rf);
+ /*
+ * Masking should be skipped if SCA_USER or any of the SCA_MIGRATE_*
+ * flags are set.
+ */
+ if (p->user_cpus_ptr &&
+ !(ctx->flags & (SCA_USER | SCA_MIGRATE_ENABLE | SCA_MIGRATE_DISABLE)) &&
+ cpumask_and(rq->scratch_mask, ctx->new_mask, p->user_cpus_ptr))
+ ctx->new_mask = rq->scratch_mask;
+
+ return __set_cpus_allowed_ptr_locked(p, ctx, rq, &rf);
}
int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask)
{
- return __set_cpus_allowed_ptr(p, new_mask, 0);
+ struct affinity_context ac = {
+ .new_mask = new_mask,
+ .flags = 0,
+ };
+
+ return __set_cpus_allowed_ptr(p, &ac);
}
EXPORT_SYMBOL_GPL(set_cpus_allowed_ptr);
/*
* Change a given task's CPU affinity to the intersection of its current
- * affinity mask and @subset_mask, writing the resulting mask to @new_mask
- * and pointing @p->user_cpus_ptr to a copy of the old mask.
+ * affinity mask and @subset_mask, writing the resulting mask to @new_mask.
+ * If user_cpus_ptr is defined, use it as the basis for restricting CPU
+ * affinity or use cpu_online_mask instead.
+ *
* If the resulting mask is empty, leave the affinity unchanged and return
* -EINVAL.
*/
struct cpumask *new_mask,
const struct cpumask *subset_mask)
{
- struct cpumask *user_mask = NULL;
+ struct affinity_context ac = {
+ .new_mask = new_mask,
+ .flags = 0,
+ };
struct rq_flags rf;
struct rq *rq;
int err;
- if (!p->user_cpus_ptr) {
- user_mask = kmalloc(cpumask_size(), GFP_KERNEL);
- if (!user_mask)
- return -ENOMEM;
- }
-
rq = task_rq_lock(p, &rf);
/*
goto err_unlock;
}
- if (!cpumask_and(new_mask, &p->cpus_mask, subset_mask)) {
+ if (!cpumask_and(new_mask, task_user_cpus(p), subset_mask)) {
err = -EINVAL;
goto err_unlock;
}
- /*
- * We're about to butcher the task affinity, so keep track of what
- * the user asked for in case we're able to restore it later on.
- */
- if (user_mask) {
- cpumask_copy(user_mask, p->cpus_ptr);
- p->user_cpus_ptr = user_mask;
- }
-
- return __set_cpus_allowed_ptr_locked(p, new_mask, 0, rq, &rf);
+ return __set_cpus_allowed_ptr_locked(p, &ac, rq, &rf);
err_unlock:
task_rq_unlock(rq, p, &rf);
- kfree(user_mask);
return err;
}
/*
* Restrict the CPU affinity of task @p so that it is a subset of
- * task_cpu_possible_mask() and point @p->user_cpu_ptr to a copy of the
+ * task_cpu_possible_mask() and point @p->user_cpus_ptr to a copy of the
* old affinity mask. If the resulting mask is empty, we warn and walk
* up the cpuset hierarchy until we find a suitable mask.
*/
}
static int
-__sched_setaffinity(struct task_struct *p, const struct cpumask *mask);
+__sched_setaffinity(struct task_struct *p, struct affinity_context *ctx);
/*
* Restore the affinity of a task @p which was previously restricted by a
- * call to force_compatible_cpus_allowed_ptr(). This will clear (and free)
- * @p->user_cpus_ptr.
+ * call to force_compatible_cpus_allowed_ptr().
*
* It is the caller's responsibility to serialise this with any calls to
* force_compatible_cpus_allowed_ptr(@p).
*/
void relax_compatible_cpus_allowed_ptr(struct task_struct *p)
{
- struct cpumask *user_mask = p->user_cpus_ptr;
- unsigned long flags;
+ struct affinity_context ac = {
+ .new_mask = task_user_cpus(p),
+ .flags = 0,
+ };
+ int ret;
/*
- * Try to restore the old affinity mask. If this fails, then
- * we free the mask explicitly to avoid it being inherited across
- * a subsequent fork().
+ * Try to restore the old affinity mask with __sched_setaffinity().
+ * Cpuset masking will be done there too.
*/
- if (!user_mask || !__sched_setaffinity(p, user_mask))
- return;
-
- raw_spin_lock_irqsave(&p->pi_lock, flags);
- user_mask = clear_user_cpus_ptr(p);
- raw_spin_unlock_irqrestore(&p->pi_lock, flags);
-
- kfree(user_mask);
+ ret = __sched_setaffinity(p, &ac);
+ WARN_ON_ONCE(ret);
}
void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
#else /* CONFIG_SMP */
static inline int __set_cpus_allowed_ptr(struct task_struct *p,
- const struct cpumask *new_mask,
- u32 flags)
+ struct affinity_context *ctx)
{
- return set_cpus_allowed_ptr(p, new_mask);
+ return set_cpus_allowed_ptr(p, ctx->new_mask);
}
static inline void migrate_disable_switch(struct rq *rq, struct task_struct *p) { }
if (!llist)
return;
- /*
- * rq::ttwu_pending racy indication of out-standing wakeups.
- * Races such that false-negatives are possible, since they
- * are shorter lived that false-positives would be.
- */
- WRITE_ONCE(rq->ttwu_pending, 0);
-
rq_lock_irqsave(rq, &rf);
update_rq_clock(rq);
ttwu_do_activate(rq, p, p->sched_remote_wakeup ? WF_MIGRATED : 0, &rf);
}
+ /*
+ * Must be after enqueueing at least once task such that
+ * idle_cpu() does not observe a false-negative -- if it does,
+ * it is possible for select_idle_siblings() to stack a number
+ * of tasks on this CPU during that window.
+ *
+ * It is ok to clear ttwu_pending when another task pending.
+ * We will receive IPI after local irq enabled and then enqueue it.
+ * Since now nr_running > 0, idle_cpu() will always get correct result.
+ */
+ WRITE_ONCE(rq->ttwu_pending, 0);
rq_unlock_irqrestore(rq, &rf);
}
return success;
}
+static bool __task_needs_rq_lock(struct task_struct *p)
+{
+ unsigned int state = READ_ONCE(p->__state);
+
+ /*
+ * Since pi->lock blocks try_to_wake_up(), we don't need rq->lock when
+ * the task is blocked. Make sure to check @state since ttwu() can drop
+ * locks at the end, see ttwu_queue_wakelist().
+ */
+ if (state == TASK_RUNNING || state == TASK_WAKING)
+ return true;
+
+ /*
+ * Ensure we load p->on_rq after p->__state, otherwise it would be
+ * possible to, falsely, observe p->on_rq == 0.
+ *
+ * See try_to_wake_up() for a longer comment.
+ */
+ smp_rmb();
+ if (p->on_rq)
+ return true;
+
+#ifdef CONFIG_SMP
+ /*
+ * Ensure the task has finished __schedule() and will not be referenced
+ * anymore. Again, see try_to_wake_up() for a longer comment.
+ */
+ smp_rmb();
+ smp_cond_load_acquire(&p->on_cpu, !VAL);
+#endif
+
+ return false;
+}
+
/**
* task_call_func - Invoke a function on task in fixed state
* @p: Process for which the function is to be invoked, can be @current.
int task_call_func(struct task_struct *p, task_call_f func, void *arg)
{
struct rq *rq = NULL;
- unsigned int state;
struct rq_flags rf;
int ret;
raw_spin_lock_irqsave(&p->pi_lock, rf.flags);
- state = READ_ONCE(p->__state);
-
- /*
- * Ensure we load p->on_rq after p->__state, otherwise it would be
- * possible to, falsely, observe p->on_rq == 0.
- *
- * See try_to_wake_up() for a longer comment.
- */
- smp_rmb();
-
- /*
- * Since pi->lock blocks try_to_wake_up(), we don't need rq->lock when
- * the task is blocked. Make sure to check @state since ttwu() can drop
- * locks at the end, see ttwu_queue_wakelist().
- */
- if (state == TASK_RUNNING || state == TASK_WAKING || p->on_rq)
+ if (__task_needs_rq_lock(p))
rq = __task_rq_lock(p, &rf);
/*
}
}
-int sysctl_numa_balancing(struct ctl_table *table, int write,
+static int sysctl_numa_balancing(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
struct ctl_table t;
.proc_handler = sysctl_sched_uclamp_handler,
},
#endif /* CONFIG_UCLAMP_TASK */
+#ifdef CONFIG_NUMA_BALANCING
+ {
+ .procname = "numa_balancing",
+ .data = NULL, /* filled in by handler */
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sysctl_numa_balancing,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_FOUR,
+ },
+#endif /* CONFIG_NUMA_BALANCING */
{}
};
static int __init sched_core_sysctl_init(void)
#ifdef CONFIG_SMP
-static void do_balance_callbacks(struct rq *rq, struct callback_head *head)
+static void do_balance_callbacks(struct rq *rq, struct balance_callback *head)
{
void (*func)(struct rq *rq);
- struct callback_head *next;
+ struct balance_callback *next;
lockdep_assert_rq_held(rq);
* This abuse is tolerated because it places all the unlikely/odd cases behind
* a single test, namely: rq->balance_callback == NULL.
*/
-struct callback_head balance_push_callback = {
+struct balance_callback balance_push_callback = {
.next = NULL,
- .func = (void (*)(struct callback_head *))balance_push,
+ .func = balance_push,
};
-static inline struct callback_head *
+static inline struct balance_callback *
__splice_balance_callbacks(struct rq *rq, bool split)
{
- struct callback_head *head = rq->balance_callback;
+ struct balance_callback *head = rq->balance_callback;
if (likely(!head))
return NULL;
return head;
}
-static inline struct callback_head *splice_balance_callbacks(struct rq *rq)
+static inline struct balance_callback *splice_balance_callbacks(struct rq *rq)
{
return __splice_balance_callbacks(rq, true);
}
do_balance_callbacks(rq, __splice_balance_callbacks(rq, false));
}
-static inline void balance_callbacks(struct rq *rq, struct callback_head *head)
+static inline void balance_callbacks(struct rq *rq, struct balance_callback *head)
{
unsigned long flags;
{
}
-static inline struct callback_head *splice_balance_callbacks(struct rq *rq)
+static inline struct balance_callback *splice_balance_callbacks(struct rq *rq)
{
return NULL;
}
-static inline void balance_callbacks(struct rq *rq, struct callback_head *head)
+static inline void balance_callbacks(struct rq *rq, struct balance_callback *head)
{
}
pr_err("Preemption disabled at:");
print_ip_sym(KERN_ERR, preempt_disable_ip);
}
- if (panic_on_warn)
- panic("scheduling while atomic\n");
+ check_panic_on_warn("scheduling while atomic");
dump_stack();
add_taint(TAINT_WARN, LOCKDEP_STILL_OK);
preempt_enable();
}
-static DEFINE_PER_CPU(struct callback_head, core_balance_head);
+static DEFINE_PER_CPU(struct balance_callback, core_balance_head);
static void queue_core_balance(struct rq *rq)
{
int oldpolicy = -1, policy = attr->sched_policy;
int retval, oldprio, newprio, queued, running;
const struct sched_class *prev_class;
- struct callback_head *head;
+ struct balance_callback *head;
struct rq_flags rf;
int reset_on_fork;
int queue_flags = DEQUEUE_SAVE | DEQUEUE_MOVE | DEQUEUE_NOCLOCK;
#endif
static int
-__sched_setaffinity(struct task_struct *p, const struct cpumask *mask)
+__sched_setaffinity(struct task_struct *p, struct affinity_context *ctx)
{
int retval;
cpumask_var_t cpus_allowed, new_mask;
}
cpuset_cpus_allowed(p, cpus_allowed);
- cpumask_and(new_mask, mask, cpus_allowed);
+ cpumask_and(new_mask, ctx->new_mask, cpus_allowed);
+
+ ctx->new_mask = new_mask;
+ ctx->flags |= SCA_CHECK;
retval = dl_task_check_affinity(p, new_mask);
if (retval)
goto out_free_new_mask;
-again:
- retval = __set_cpus_allowed_ptr(p, new_mask, SCA_CHECK | SCA_USER);
+
+ retval = __set_cpus_allowed_ptr(p, ctx);
if (retval)
goto out_free_new_mask;
* Just reset the cpumask to the cpuset's cpus_allowed.
*/
cpumask_copy(new_mask, cpus_allowed);
- goto again;
+
+ /*
+ * If SCA_USER is set, a 2nd call to __set_cpus_allowed_ptr()
+ * will restore the previous user_cpus_ptr value.
+ *
+ * In the unlikely event a previous user_cpus_ptr exists,
+ * we need to further restrict the mask to what is allowed
+ * by that old user_cpus_ptr.
+ */
+ if (unlikely((ctx->flags & SCA_USER) && ctx->user_mask)) {
+ bool empty = !cpumask_and(new_mask, new_mask,
+ ctx->user_mask);
+
+ if (WARN_ON_ONCE(empty))
+ cpumask_copy(new_mask, cpus_allowed);
+ }
+ __set_cpus_allowed_ptr(p, ctx);
+ retval = -EINVAL;
}
out_free_new_mask:
long sched_setaffinity(pid_t pid, const struct cpumask *in_mask)
{
+ struct affinity_context ac;
+ struct cpumask *user_mask;
struct task_struct *p;
int retval;
if (retval)
goto out_put_task;
- retval = __sched_setaffinity(p, in_mask);
+ user_mask = kmalloc(cpumask_size(), GFP_KERNEL);
+ if (!user_mask) {
+ retval = -ENOMEM;
+ goto out_put_task;
+ }
+ cpumask_copy(user_mask, in_mask);
+ ac = (struct affinity_context){
+ .new_mask = in_mask,
+ .user_mask = user_mask,
+ .flags = SCA_USER,
+ };
+
+ retval = __sched_setaffinity(p, &ac);
+ kfree(ac.user_mask);
+
out_put_task:
put_task_struct(p);
return retval;
*/
void __init init_idle(struct task_struct *idle, int cpu)
{
+#ifdef CONFIG_SMP
+ struct affinity_context ac = (struct affinity_context) {
+ .new_mask = cpumask_of(cpu),
+ .flags = 0,
+ };
+#endif
struct rq *rq = cpu_rq(cpu);
unsigned long flags;
*
* And since this is boot we can forgo the serialization.
*/
- set_cpus_allowed_common(idle, cpumask_of(cpu), 0);
+ set_cpus_allowed_common(idle, &ac);
#endif
/*
* We're having a chicken and egg problem, even though we are
rq->core_cookie = 0UL;
#endif
+ zalloc_cpumask_var_node(&rq->scratch_mask, GFP_KERNEL, cpu_to_node(i));
}
set_load_weight(&init_task, false);
static void print_fatal_signal(int signr)
{
- struct pt_regs *regs = signal_pt_regs();
+ struct pt_regs *regs = task_pt_regs(current);
pr_info("potentially unexpected fatal signal %d.\n", signr);
#if defined(__i386__) && !defined(__arch_um__)
/* Has this task already been marked for death? */
if ((signal->flags & SIGNAL_GROUP_EXIT) ||
signal->group_exec_task) {
+ clear_siginfo(&ksig->info);
ksig->info.si_signo = signr = SIGKILL;
sigdelset(¤t->pending.signal, SIGKILL);
trace_signal_deliver(SIGKILL, SEND_SIG_NOINFO,
config FRAME_WARN
int "Warn for stack frames larger than"
range 0 8192
+ default 0 if KMSAN
default 2048 if GCC_PLUGIN_LATENT_ENTROPY
default 2048 if PARISC
default 1536 if (!64BIT && XTENSA)
+ default 1280 if KASAN && !64BIT
default 1024 if !64BIT
default 2048 if 64BIT
help
- Tell gcc to warn at build time for stack frames larger than this.
+ Tell the compiler to warn at build time for stack frames larger than this.
Setting this too low will cause a lot of warnings.
Setting it to 0 disables the warning.
Enable this option if you want to use the LatencyTOP tool
to find out which userspace is blocking on what kernel operations.
+config DEBUG_CGROUP_REF
+ bool "Disable inlining of cgroup css reference count functions"
+ depends on DEBUG_KERNEL
+ depends on CGROUPS
+ depends on KPROBES
+ default n
+ help
+ Force cgroup css reference count functions to not be inlined so
+ that they can be kprobed for debugging.
+
source "kernel/trace/Kconfig"
config PROVIDE_OHCI1394_DMA_INIT
If unsure, say N.
config FUNCTION_ERROR_INJECTION
- def_bool y
+ bool "Fault-injections of functions"
depends on HAVE_FUNCTION_ERROR_INJECTION && KPROBES
+ help
+ Add fault injections into various functions that are annotated with
+ ALLOW_ERROR_INJECTION() in the kernel. BPF may also modify the return
+ value of theses functions. This is useful to test error paths of code.
+
+ If unsure, say N
config FAULT_INJECTION
bool "Fault-injection framework"
depends on DEBUG_KERNEL
depends on KPROBES
depends on KUNIT
+ select STACKTRACE if ARCH_CORRECT_STACKTRACE_ON_KRETPROBE
default KUNIT_ALL_TESTS
help
This option provides for testing basic kprobes functionality on
config TEST_STRING_HELPERS
tristate "Test functions located in the string_helpers module at runtime"
- config TEST_STRSCPY
- tristate "Test strscpy*() family of functions at runtime"
-
config TEST_KSTRTOX
tristate "Test kstrto*() family of functions at runtime"
config TEST_XARRAY
tristate "Test the XArray code at runtime"
+config TEST_MAPLE_TREE
+ depends on DEBUG_KERNEL
+ select DEBUG_MAPLE_TREE
+ tristate "Test the Maple Tree code at runtime"
+
config TEST_RHASHTABLE
tristate "Perform selftest on resizable hash table"
help
If unsure, say N.
- config TEST_SIPHASH
- tristate "Perform selftest on siphash functions"
- help
- Enable this option to test the kernel's siphash (<linux/siphash.h>) hash
- functions on boot (or module load).
-
- This is intended to help people writing architecture-specific
- optimized versions. If unsure, say N.
-
config TEST_IDA
tristate "Perform selftest on IDA functions"
If unsure, say N.
+ config STRSCPY_KUNIT_TEST
+ tristate "Test strscpy*() family of functions at runtime" if !KUNIT_ALL_TESTS
+ depends on KUNIT
+ default KUNIT_ALL_TESTS
+
+ config SIPHASH_KUNIT_TEST
+ tristate "Perform selftest on siphash functions" if !KUNIT_ALL_TESTS
+ depends on KUNIT
+ default KUNIT_ALL_TESTS
+ help
+ Enable this option to test the kernel's siphash (<linux/siphash.h>) hash
+ functions on boot (or module load).
+
+ This is intended to help people writing architecture-specific
+ optimized versions. If unsure, say N.
+
config TEST_UDELAY
tristate "udelay test driver"
help
If unsure, say Y.
+config RUST_BUILD_ASSERT_ALLOW
+ bool "Allow unoptimized build-time assertions"
+ depends on RUST
+ help
+ Controls how are `build_error!` and `build_assert!` handled during build.
+
+ If calls to them exist in the binary, it may indicate a violated invariant
+ or that the optimizer failed to verify the invariant during compilation.
+
+ This should not happen, thus by default the build is aborted. However,
+ as an escape hatch, you can choose Y here to ignore them during build
+ and let the check be carried at runtime (with `panic!` being called if
+ the check fails).
+
+ If unsure, say N.
+
endmenu # "Rust"
source "Documentation/Kconfig"
CFLAGS_test_bitops.o += -Werror
obj-$(CONFIG_CPUMASK_KUNIT_TEST) += cpumask_kunit.o
obj-$(CONFIG_TEST_SYSCTL) += test_sysctl.o
- obj-$(CONFIG_TEST_SIPHASH) += test_siphash.o
obj-$(CONFIG_HASH_KUNIT_TEST) += test_hash.o
obj-$(CONFIG_TEST_IDA) += test_ida.o
obj-$(CONFIG_TEST_UBSAN) += test_ubsan.o
obj-$(CONFIG_TEST_PRINTF) += test_printf.o
obj-$(CONFIG_TEST_SCANF) += test_scanf.o
obj-$(CONFIG_TEST_BITMAP) += test_bitmap.o
- obj-$(CONFIG_TEST_STRSCPY) += test_strscpy.o
obj-$(CONFIG_TEST_UUID) += test_uuid.o
obj-$(CONFIG_TEST_XARRAY) += test_xarray.o
+obj-$(CONFIG_TEST_MAPLE_TREE) += test_maple_tree.o
obj-$(CONFIG_TEST_PARMAN) += test_parman.o
obj-$(CONFIG_TEST_KMOD) += test_kmod.o
obj-$(CONFIG_TEST_DEBUG_VIRTUAL) += test_debug_virtual.o
obj-$(CONFIG_SLUB_KUNIT_TEST) += slub_kunit.o
obj-$(CONFIG_MEMCPY_KUNIT_TEST) += memcpy_kunit.o
obj-$(CONFIG_IS_SIGNED_TYPE_KUNIT_TEST) += is_signed_type_kunit.o
+ CFLAGS_overflow_kunit.o = $(call cc-disable-warning, tautological-constant-out-of-range-compare)
obj-$(CONFIG_OVERFLOW_KUNIT_TEST) += overflow_kunit.o
CFLAGS_stackinit_kunit.o += $(call cc-disable-warning, switch-unreachable)
obj-$(CONFIG_STACKINIT_KUNIT_TEST) += stackinit_kunit.o
+ CFLAGS_fortify_kunit.o += $(call cc-disable-warning, unsequenced)
+ CFLAGS_fortify_kunit.o += $(DISABLE_STRUCTLEAK_PLUGIN)
obj-$(CONFIG_FORTIFY_KUNIT_TEST) += fortify_kunit.o
+ obj-$(CONFIG_STRSCPY_KUNIT_TEST) += strscpy_kunit.o
+ obj-$(CONFIG_SIPHASH_KUNIT_TEST) += siphash_kunit.o
obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o
#undef TEST_OP
}
+static unsigned char larger_array [2048];
+
static void memmove_test(struct kunit *test)
{
#define TEST_OP "memmove"
ptr = &overlap.data[2];
memmove(ptr, overlap.data, 5);
compare("overlapping write", overlap, overlap_expected);
+
+ /* Verify larger overlapping moves. */
+ larger_array[256] = 0xAAu;
+ /*
+ * Test a backwards overlapping memmove first. 256 and 1024 are
+ * important for i386 to use rep movsl.
+ */
+ memmove(larger_array, larger_array + 256, 1024);
+ KUNIT_ASSERT_EQ(test, larger_array[0], 0xAAu);
+ KUNIT_ASSERT_EQ(test, larger_array[256], 0x00);
+ KUNIT_ASSERT_NULL(test,
+ memchr(larger_array + 1, 0xaa, ARRAY_SIZE(larger_array) - 1));
+ /* Test a forwards overlapping memmove. */
+ larger_array[0] = 0xBBu;
+ memmove(larger_array + 256, larger_array, 1024);
+ KUNIT_ASSERT_EQ(test, larger_array[0], 0xBBu);
+ KUNIT_ASSERT_EQ(test, larger_array[256], 0xBBu);
+ KUNIT_ASSERT_NULL(test, memchr(larger_array + 1, 0xBBu, 256 - 1));
+ KUNIT_ASSERT_NULL(test,
+ memchr(larger_array + 257, 0xBBu, ARRAY_SIZE(larger_array) - 257));
#undef TEST_OP
}
#undef TEST_OP
}
+ static u8 large_src[1024];
+ static u8 large_dst[2048];
+ static const u8 large_zero[2048];
+
+ static void set_random_nonzero(struct kunit *test, u8 *byte)
+ {
+ int failed_rng = 0;
+
+ while (*byte == 0) {
+ get_random_bytes(byte, 1);
+ KUNIT_ASSERT_LT_MSG(test, failed_rng++, 100,
+ "Is the RNG broken?");
+ }
+ }
+
+ static void init_large(struct kunit *test)
+ {
+
+ /* Get many bit patterns. */
+ get_random_bytes(large_src, ARRAY_SIZE(large_src));
+
+ /* Make sure we have non-zero edges. */
+ set_random_nonzero(test, &large_src[0]);
+ set_random_nonzero(test, &large_src[ARRAY_SIZE(large_src) - 1]);
+
+ /* Explicitly zero the entire destination. */
+ memset(large_dst, 0, ARRAY_SIZE(large_dst));
+ }
+
+ /*
+ * Instead of an indirect function call for "copy" or a giant macro,
+ * use a bool to pick memcpy or memmove.
+ */
+ static void copy_large_test(struct kunit *test, bool use_memmove)
+ {
+ init_large(test);
+
+ /* Copy a growing number of non-overlapping bytes ... */
+ for (int bytes = 1; bytes <= ARRAY_SIZE(large_src); bytes++) {
+ /* Over a shifting destination window ... */
+ for (int offset = 0; offset < ARRAY_SIZE(large_src); offset++) {
+ int right_zero_pos = offset + bytes;
+ int right_zero_size = ARRAY_SIZE(large_dst) - right_zero_pos;
+
+ /* Copy! */
+ if (use_memmove)
+ memmove(large_dst + offset, large_src, bytes);
+ else
+ memcpy(large_dst + offset, large_src, bytes);
+
+ /* Did we touch anything before the copy area? */
+ KUNIT_ASSERT_EQ_MSG(test,
+ memcmp(large_dst, large_zero, offset), 0,
+ "with size %d at offset %d", bytes, offset);
+ /* Did we touch anything after the copy area? */
+ KUNIT_ASSERT_EQ_MSG(test,
+ memcmp(&large_dst[right_zero_pos], large_zero, right_zero_size), 0,
+ "with size %d at offset %d", bytes, offset);
+
+ /* Are we byte-for-byte exact across the copy? */
+ KUNIT_ASSERT_EQ_MSG(test,
+ memcmp(large_dst + offset, large_src, bytes), 0,
+ "with size %d at offset %d", bytes, offset);
+
+ /* Zero out what we copied for the next cycle. */
+ memset(large_dst + offset, 0, bytes);
+ }
+ /* Avoid stall warnings if this loop gets slow. */
+ cond_resched();
+ }
+ }
+
+ static void memcpy_large_test(struct kunit *test)
+ {
+ copy_large_test(test, false);
+ }
+
+ static void memmove_large_test(struct kunit *test)
+ {
+ copy_large_test(test, true);
+ }
+
+ /*
+ * On the assumption that boundary conditions are going to be the most
+ * sensitive, instead of taking a full step (inc) each iteration,
+ * take single index steps for at least the first "inc"-many indexes
+ * from the "start" and at least the last "inc"-many indexes before
+ * the "end". When in the middle, take full "inc"-wide steps. For
+ * example, calling next_step(idx, 1, 15, 3) with idx starting at 0
+ * would see the following pattern: 1 2 3 4 7 10 11 12 13 14 15.
+ */
+ static int next_step(int idx, int start, int end, int inc)
+ {
+ start += inc;
+ end -= inc;
+
+ if (idx < start || idx + inc > end)
+ inc = 1;
+ return idx + inc;
+ }
+
+ static void inner_loop(struct kunit *test, int bytes, int d_off, int s_off)
+ {
+ int left_zero_pos, left_zero_size;
+ int right_zero_pos, right_zero_size;
+ int src_pos, src_orig_pos, src_size;
+ int pos;
+
+ /* Place the source in the destination buffer. */
+ memcpy(&large_dst[s_off], large_src, bytes);
+
+ /* Copy to destination offset. */
+ memmove(&large_dst[d_off], &large_dst[s_off], bytes);
+
+ /* Make sure destination entirely matches. */
+ KUNIT_ASSERT_EQ_MSG(test, memcmp(&large_dst[d_off], large_src, bytes), 0,
+ "with size %d at src offset %d and dest offset %d",
+ bytes, s_off, d_off);
+
+ /* Calculate the expected zero spans. */
+ if (s_off < d_off) {
+ left_zero_pos = 0;
+ left_zero_size = s_off;
+
+ right_zero_pos = d_off + bytes;
+ right_zero_size = ARRAY_SIZE(large_dst) - right_zero_pos;
+
+ src_pos = s_off;
+ src_orig_pos = 0;
+ src_size = d_off - s_off;
+ } else {
+ left_zero_pos = 0;
+ left_zero_size = d_off;
+
+ right_zero_pos = s_off + bytes;
+ right_zero_size = ARRAY_SIZE(large_dst) - right_zero_pos;
+
+ src_pos = d_off + bytes;
+ src_orig_pos = src_pos - s_off;
+ src_size = right_zero_pos - src_pos;
+ }
+
+ /* Check non-overlapping source is unchanged.*/
+ KUNIT_ASSERT_EQ_MSG(test,
+ memcmp(&large_dst[src_pos], &large_src[src_orig_pos], src_size), 0,
+ "with size %d at src offset %d and dest offset %d",
+ bytes, s_off, d_off);
+
+ /* Check leading buffer contents are zero. */
+ KUNIT_ASSERT_EQ_MSG(test,
+ memcmp(&large_dst[left_zero_pos], large_zero, left_zero_size), 0,
+ "with size %d at src offset %d and dest offset %d",
+ bytes, s_off, d_off);
+ /* Check trailing buffer contents are zero. */
+ KUNIT_ASSERT_EQ_MSG(test,
+ memcmp(&large_dst[right_zero_pos], large_zero, right_zero_size), 0,
+ "with size %d at src offset %d and dest offset %d",
+ bytes, s_off, d_off);
+
+ /* Zero out everything not already zeroed.*/
+ pos = left_zero_pos + left_zero_size;
+ memset(&large_dst[pos], 0, right_zero_pos - pos);
+ }
+
+ static void memmove_overlap_test(struct kunit *test)
+ {
+ /*
+ * Running all possible offset and overlap combinations takes a
+ * very long time. Instead, only check up to 128 bytes offset
+ * into the destination buffer (which should result in crossing
+ * cachelines), with a step size of 1 through 7 to try to skip some
+ * redundancy.
+ */
+ static const int offset_max = 128; /* less than ARRAY_SIZE(large_src); */
+ static const int bytes_step = 7;
+ static const int window_step = 7;
+
+ static const int bytes_start = 1;
+ static const int bytes_end = ARRAY_SIZE(large_src) + 1;
+
+ init_large(test);
+
+ /* Copy a growing number of overlapping bytes ... */
+ for (int bytes = bytes_start; bytes < bytes_end;
+ bytes = next_step(bytes, bytes_start, bytes_end, bytes_step)) {
+
+ /* Over a shifting destination window ... */
+ for (int d_off = 0; d_off < offset_max; d_off++) {
+ int s_start = max(d_off - bytes, 0);
+ int s_end = min_t(int, d_off + bytes, ARRAY_SIZE(large_src));
+
+ /* Over a shifting source window ... */
+ for (int s_off = s_start; s_off < s_end;
+ s_off = next_step(s_off, s_start, s_end, window_step))
+ inner_loop(test, bytes, d_off, s_off);
+
+ /* Avoid stall warnings. */
+ cond_resched();
+ }
+ }
+ }
+
static void strtomem_test(struct kunit *test)
{
static const char input[sizeof(unsigned long)] = "hi";
static struct kunit_case memcpy_test_cases[] = {
KUNIT_CASE(memset_test),
KUNIT_CASE(memcpy_test),
+ KUNIT_CASE(memcpy_large_test),
KUNIT_CASE(memmove_test),
+ KUNIT_CASE(memmove_large_test),
+ KUNIT_CASE(memmove_overlap_test),
KUNIT_CASE(strtomem_test),
{}
};
* Author: Andrey Ryabinin <a.ryabinin@samsung.com>
*/
+#define pr_fmt(fmt) "kasan_test: " fmt
+
+#include <kunit/test.h>
#include <linux/bitops.h>
#include <linux/delay.h>
+#include <linux/io.h>
#include <linux/kasan.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/printk.h>
#include <linux/random.h>
+#include <linux/set_memory.h>
#include <linux/slab.h>
#include <linux/string.h>
+#include <linux/tracepoint.h>
#include <linux/uaccess.h>
-#include <linux/io.h>
#include <linux/vmalloc.h>
-#include <linux/set_memory.h>
+#include <trace/events/printk.h>
#include <asm/page.h>
-#include <kunit/test.h>
-
#include "kasan.h"
#define OOB_TAG_OFF (IS_ENABLED(CONFIG_KASAN_GENERIC) ? 0 : KASAN_GRANULE_SIZE)
+static bool multishot;
+
+/* Fields set based on lines observed in the console. */
+static struct {
+ bool report_found;
+ bool async_fault;
+} test_status;
+
/*
* Some tests use these global variables to store return values from function
* calls that could otherwise be eliminated by the compiler as dead code.
void *kasan_ptr_result;
int kasan_int_result;
-static struct kunit_resource resource;
-static struct kunit_kasan_status test_status;
-static bool multishot;
+/* Probe for console output: obtains test_status lines of interest. */
+static void probe_console(void *ignore, const char *buf, size_t len)
+{
+ if (strnstr(buf, "BUG: KASAN: ", len))
+ WRITE_ONCE(test_status.report_found, true);
+ else if (strnstr(buf, "Asynchronous fault: ", len))
+ WRITE_ONCE(test_status.async_fault, true);
+}
-/*
- * Temporarily enable multi-shot mode. Otherwise, KASAN would only report the
- * first detected bug and panic the kernel if panic_on_warn is enabled. For
- * hardware tag-based KASAN also allow tag checking to be reenabled for each
- * test, see the comment for KUNIT_EXPECT_KASAN_FAIL().
- */
-static int kasan_test_init(struct kunit *test)
+static void register_tracepoints(struct tracepoint *tp, void *ignore)
+{
+ check_trace_callback_type_console(probe_console);
+ if (!strcmp(tp->name, "console"))
+ WARN_ON(tracepoint_probe_register(tp, probe_console, NULL));
+}
+
+static void unregister_tracepoints(struct tracepoint *tp, void *ignore)
+{
+ if (!strcmp(tp->name, "console"))
+ tracepoint_probe_unregister(tp, probe_console, NULL);
+}
+
+static int kasan_suite_init(struct kunit_suite *suite)
{
if (!kasan_enabled()) {
- kunit_err(test, "can't run KASAN tests with KASAN disabled");
+ pr_err("Can't run KASAN tests with KASAN disabled");
return -1;
}
+ /* Stop failing KUnit tests on KASAN reports. */
+ kasan_kunit_test_suite_start();
+
+ /*
+ * Temporarily enable multi-shot mode. Otherwise, KASAN would only
+ * report the first detected bug and panic the kernel if panic_on_warn
+ * is enabled.
+ */
multishot = kasan_save_enable_multi_shot();
- test_status.report_found = false;
- test_status.sync_fault = false;
- kunit_add_named_resource(test, NULL, NULL, &resource,
- "kasan_status", &test_status);
+
+ /*
+ * Because we want to be able to build the test as a module, we need to
+ * iterate through all known tracepoints, since the static registration
+ * won't work here.
+ */
+ for_each_kernel_tracepoint(register_tracepoints, NULL);
return 0;
}
-static void kasan_test_exit(struct kunit *test)
+static void kasan_suite_exit(struct kunit_suite *suite)
{
+ kasan_kunit_test_suite_end();
kasan_restore_multi_shot(multishot);
- KUNIT_EXPECT_FALSE(test, test_status.report_found);
+ for_each_kernel_tracepoint(unregister_tracepoints, NULL);
+ tracepoint_synchronize_unregister();
+}
+
+static void kasan_test_exit(struct kunit *test)
+{
+ KUNIT_EXPECT_FALSE(test, READ_ONCE(test_status.report_found));
}
/**
if (IS_ENABLED(CONFIG_KASAN_HW_TAGS) && \
kasan_sync_fault_possible()) { \
if (READ_ONCE(test_status.report_found) && \
- READ_ONCE(test_status.sync_fault)) \
+ !READ_ONCE(test_status.async_fault)) \
kasan_enable_tagging(); \
migrate_enable(); \
} \
WRITE_ONCE(test_status.report_found, false); \
+ WRITE_ONCE(test_status.async_fault, false); \
} while (0)
#define KASAN_TEST_NEEDS_CONFIG_ON(test, config) do { \
KUNIT_EXPECT_KASAN_FAIL(test, *(volatile char *)p);
}
- /* Check that ksize() makes the whole object accessible. */
+ /* Check that ksize() does NOT unpoison whole object. */
static void ksize_unpoisons_memory(struct kunit *test)
{
char *ptr;
- size_t size = 123, real_size;
+ size_t size = 128 - KASAN_GRANULE_SIZE - 5;
+ size_t real_size;
ptr = kmalloc(size, GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+
real_size = ksize(ptr);
+ KUNIT_EXPECT_GT(test, real_size, size);
OPTIMIZER_HIDE_VAR(ptr);
- /* This access shouldn't trigger a KASAN report. */
- ptr[size] = 'x';
+ /* These accesses shouldn't trigger a KASAN report. */
+ ptr[0] = 'x';
+ ptr[size - 1] = 'x';
- /* This one must. */
- KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[real_size]);
+ /* These must trigger a KASAN report. */
+ if (IS_ENABLED(CONFIG_KASAN_GENERIC))
+ KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[size]);
+ KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[size + 5]);
+ KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[real_size - 1]);
kfree(ptr);
}
KUNIT_EXPECT_KASAN_FAIL(test, kfree_sensitive(ptr));
}
+/*
+ * The two tests below check that Generic KASAN prints auxiliary stack traces
+ * for RCU callbacks and workqueues. The reports need to be inspected manually.
+ *
+ * These tests are still enabled for other KASAN modes to make sure that all
+ * modes report bad accesses in tested scenarios.
+ */
+
+static struct kasan_rcu_info {
+ int i;
+ struct rcu_head rcu;
+} *global_rcu_ptr;
+
+static void rcu_uaf_reclaim(struct rcu_head *rp)
+{
+ struct kasan_rcu_info *fp =
+ container_of(rp, struct kasan_rcu_info, rcu);
+
+ kfree(fp);
+ ((volatile struct kasan_rcu_info *)fp)->i;
+}
+
+static void rcu_uaf(struct kunit *test)
+{
+ struct kasan_rcu_info *ptr;
+
+ ptr = kmalloc(sizeof(struct kasan_rcu_info), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+
+ global_rcu_ptr = rcu_dereference_protected(
+ (struct kasan_rcu_info __rcu *)ptr, NULL);
+
+ KUNIT_EXPECT_KASAN_FAIL(test,
+ call_rcu(&global_rcu_ptr->rcu, rcu_uaf_reclaim);
+ rcu_barrier());
+}
+
+static void workqueue_uaf_work(struct work_struct *work)
+{
+ kfree(work);
+}
+
+static void workqueue_uaf(struct kunit *test)
+{
+ struct workqueue_struct *workqueue;
+ struct work_struct *work;
+
+ workqueue = create_workqueue("kasan_workqueue_test");
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, workqueue);
+
+ work = kmalloc(sizeof(struct work_struct), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, work);
+
+ INIT_WORK(work, workqueue_uaf_work);
+ queue_work(workqueue, work);
+ destroy_workqueue(workqueue);
+
+ KUNIT_EXPECT_KASAN_FAIL(test,
+ ((volatile struct work_struct *)work)->data);
+}
+
static void vmalloc_helpers_tags(struct kunit *test)
{
void *ptr;
KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_KASAN_GENERIC);
for (i = 0; i < 256; i++) {
- size = prandom_u32_max(1024) + 1;
+ size = get_random_u32_inclusive(1, 1024);
ptr = kmalloc(size, GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
KUNIT_EXPECT_GE(test, (u8)get_tag(ptr), (u8)KASAN_TAG_MIN);
}
for (i = 0; i < 256; i++) {
- order = prandom_u32_max(4) + 1;
+ order = get_random_u32_inclusive(1, 4);
pages = alloc_pages(GFP_KERNEL, order);
ptr = page_address(pages);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
return;
for (i = 0; i < 256; i++) {
- size = prandom_u32_max(1024) + 1;
+ size = get_random_u32_inclusive(1, 1024);
ptr = vmalloc(size);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
KUNIT_EXPECT_GE(test, (u8)get_tag(ptr), (u8)KASAN_TAG_MIN);
KUNIT_CASE(kasan_bitops_generic),
KUNIT_CASE(kasan_bitops_tags),
KUNIT_CASE(kmalloc_double_kzfree),
+ KUNIT_CASE(rcu_uaf),
+ KUNIT_CASE(workqueue_uaf),
KUNIT_CASE(vmalloc_helpers_tags),
KUNIT_CASE(vmalloc_oob),
KUNIT_CASE(vmap_tags),
static struct kunit_suite kasan_kunit_test_suite = {
.name = "kasan",
- .init = kasan_test_init,
.test_cases = kasan_kunit_test_cases,
.exit = kasan_test_exit,
+ .suite_init = kasan_suite_init,
+ .suite_exit = kasan_suite_exit,
};
kunit_test_suite(kasan_kunit_test_suite);
* Andrey Konovalov <andreyknvl@gmail.com>
*/
+#include <kunit/test.h>
#include <linux/bitops.h>
#include <linux/ftrace.h>
#include <linux/init.h>
#include <asm/sections.h>
-#include <kunit/test.h>
-
#include "kasan.h"
#include "../slab.h"
#endif
#if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST)
-static void update_kunit_status(bool sync)
+
+/*
+ * Whether the KASAN KUnit test suite is currently being executed.
+ * Updated in kasan_test.c.
+ */
+bool kasan_kunit_executing;
+
+void kasan_kunit_test_suite_start(void)
+{
+ WRITE_ONCE(kasan_kunit_executing, true);
+}
+EXPORT_SYMBOL_GPL(kasan_kunit_test_suite_start);
+
+void kasan_kunit_test_suite_end(void)
+{
+ WRITE_ONCE(kasan_kunit_executing, false);
+}
+EXPORT_SYMBOL_GPL(kasan_kunit_test_suite_end);
+
+static bool kasan_kunit_test_suite_executing(void)
+{
+ return READ_ONCE(kasan_kunit_executing);
+}
+
+#else /* CONFIG_KASAN_KUNIT_TEST */
+
+static inline bool kasan_kunit_test_suite_executing(void) { return false; }
+
+#endif /* CONFIG_KASAN_KUNIT_TEST */
+
+#if IS_ENABLED(CONFIG_KUNIT)
+
+static void fail_non_kasan_kunit_test(void)
{
struct kunit *test;
- struct kunit_resource *resource;
- struct kunit_kasan_status *status;
- test = current->kunit_test;
- if (!test)
+ if (kasan_kunit_test_suite_executing())
return;
- resource = kunit_find_named_resource(test, "kasan_status");
- if (!resource) {
+ test = current->kunit_test;
+ if (test)
kunit_set_failure(test);
- return;
- }
+}
- status = (struct kunit_kasan_status *)resource->data;
- WRITE_ONCE(status->report_found, true);
- WRITE_ONCE(status->sync_fault, sync);
+#else /* CONFIG_KUNIT */
- kunit_put_resource(resource);
-}
-#else
-static void update_kunit_status(bool sync) { }
-#endif
+static inline void fail_non_kasan_kunit_test(void) { }
+
+#endif /* CONFIG_KUNIT */
static DEFINE_SPINLOCK(report_lock);
static void start_report(unsigned long *flags, bool sync)
{
+ fail_non_kasan_kunit_test();
/* Respect the /proc/sys/kernel/traceoff_on_warning interface. */
disable_trace_on_warning();
- /* Update status of the currently running KASAN test. */
- update_kunit_status(sync);
/* Do not allow LOCKDEP mangling KASAN reports. */
lockdep_off();
/* Make sure we don't end up in loop. */
(unsigned long)addr);
pr_err("==================================================================\n");
spin_unlock_irqrestore(&report_lock, *flags);
- if (panic_on_warn && !test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags))
- panic("panic_on_warn set ...\n");
+ if (!test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags))
+ check_panic_on_warn("KASAN");
if (kasan_arg_fault == KASAN_ARG_FAULT_PANIC)
panic("kasan.fault=panic set ...\n");
add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
if (str_has_prefix(buf, ARCH_FUNC_PREFIX "kfence_") ||
str_has_prefix(buf, ARCH_FUNC_PREFIX "__kfence_") ||
+ str_has_prefix(buf, ARCH_FUNC_PREFIX "__kmem_cache_free") ||
!strncmp(buf, ARCH_FUNC_PREFIX "__slab_free", len)) {
/*
- * In case of tail calls from any of the below
- * to any of the above.
+ * In case of tail calls from any of the below to any of
+ * the above, optimized by the compiler such that the
+ * stack trace would omit the initial entry point below.
*/
fallback = skipnr + 1;
}
- /* Also the *_bulk() variants by only checking prefixes. */
+ /*
+ * The below list should only include the initial entry points
+ * into the slab allocators. Includes the *_bulk() variants by
+ * checking prefixes.
+ */
if (str_has_prefix(buf, ARCH_FUNC_PREFIX "kfree") ||
str_has_prefix(buf, ARCH_FUNC_PREFIX "kmem_cache_free") ||
- str_has_prefix(buf, ARCH_FUNC_PREFIX "__kmem_cache_free") ||
str_has_prefix(buf, ARCH_FUNC_PREFIX "__kmalloc") ||
str_has_prefix(buf, ARCH_FUNC_PREFIX "kmem_cache_alloc"))
goto found;
lockdep_on();
- if (panic_on_warn)
- panic("panic_on_warn set ...\n");
+ check_panic_on_warn("KFENCE");
/* We encountered a memory safety error, taint the kernel! */
add_taint(TAINT_BAD_PAGE, LOCKDEP_STILL_OK);
if (s->ctor)
return 1;
+#ifdef CONFIG_HARDENED_USERCOPY
if (s->usersize)
return 1;
+#endif
/*
* We may have set a slab to be unmergeable during bootstrap.
s->size = s->object_size = object_size;
s->align = align;
s->ctor = ctor;
+#ifdef CONFIG_HARDENED_USERCOPY
s->useroffset = useroffset;
s->usersize = usersize;
+#endif
err = __kmem_cache_create(s, flags);
if (err)
flags &= CACHE_CREATE_MASK;
/* Fail closed on bad usersize of useroffset values. */
- if (WARN_ON(!usersize && useroffset) ||
+ if (!IS_ENABLED(CONFIG_HARDENED_USERCOPY) ||
+ WARN_ON(!usersize && useroffset) ||
WARN_ON(size < usersize || size - usersize < useroffset))
usersize = useroffset = 0;
ptroffset = ((char *)object - (char *)kp.kp_objp) - kp.kp_data_offset;
pr_cont(" pointer offset %lu", ptroffset);
}
- if (kp.kp_slab_cache && kp.kp_slab_cache->usersize)
- pr_cont(" size %u", kp.kp_slab_cache->usersize);
+ if (kp.kp_slab_cache && kp.kp_slab_cache->object_size)
+ pr_cont(" size %u", kp.kp_slab_cache->object_size);
if (kp.kp_ret)
pr_cont(" allocated at %pS\n", kp.kp_ret);
else
align = max(align, size);
s->align = calculate_alignment(flags, align, size);
+#ifdef CONFIG_HARDENED_USERCOPY
s->useroffset = useroffset;
s->usersize = usersize;
+#endif
err = __kmem_cache_create(s, flags);
#define KMALLOC_CGROUP_NAME(sz)
#endif
+#ifndef CONFIG_SLUB_TINY
+#define KMALLOC_RCL_NAME(sz) .name[KMALLOC_RECLAIM] = "kmalloc-rcl-" #sz,
+#else
+#define KMALLOC_RCL_NAME(sz)
+#endif
+
#define INIT_KMALLOC_INFO(__size, __short_size) \
{ \
.name[KMALLOC_NORMAL] = "kmalloc-" #__short_size, \
- .name[KMALLOC_RECLAIM] = "kmalloc-rcl-" #__short_size, \
+ KMALLOC_RCL_NAME(__short_size) \
KMALLOC_CGROUP_NAME(__short_size) \
KMALLOC_DMA_NAME(__short_size) \
.size = __size, \
static void __init
new_kmalloc_cache(int idx, enum kmalloc_cache_type type, slab_flags_t flags)
{
- if (type == KMALLOC_RECLAIM) {
+ if ((KMALLOC_RECLAIM != KMALLOC_NORMAL) && (type == KMALLOC_RECLAIM)) {
flags |= SLAB_RECLAIM_ACCOUNT;
} else if (IS_ENABLED(CONFIG_MEMCG_KMEM) && (type == KMALLOC_CGROUP)) {
if (mem_cgroup_kmem_disabled()) {
if (unlikely(size > KMALLOC_MAX_CACHE_SIZE)) {
ret = __kmalloc_large_node(size, flags, node);
- trace_kmalloc(_RET_IP_, ret, size,
+ trace_kmalloc(caller, ret, size,
PAGE_SIZE << get_order(size), flags, node);
return ret;
}
ret = __kmem_cache_alloc_node(s, flags, node, size, caller);
ret = kasan_kmalloc(s, ret, size, flags);
- trace_kmalloc(_RET_IP_, ret, size, s->size, flags, node);
+ trace_kmalloc(caller, ret, size, s->size, flags, node);
return ret;
}
/**
* __ksize -- Report full size of underlying allocation
- * @objp: pointer to the object
+ * @object: pointer to the object
*
* This should only be used internally to query the true size of allocations.
* It is not meant to be a way to discover the usable size of an allocation
* the originally requested allocation size may trigger KASAN, UBSAN_BOUNDS,
* and/or FORTIFY_SOURCE.
*
- * Return: size of the actual memory used by @objp in bytes
+ * Return: size of the actual memory used by @object in bytes
*/
size_t __ksize(const void *object)
{
return folio_size(folio);
}
+#ifdef CONFIG_SLUB_DEBUG
+ skip_orig_size_check(folio_slab(folio)->slab_cache, object);
+#endif
+
return slab_ksize(folio_slab(folio)->slab_cache);
}
-#ifdef CONFIG_TRACING
void *kmalloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size)
{
void *ret = __kmem_cache_alloc_node(s, gfpflags, NUMA_NO_NODE,
return ret;
}
EXPORT_SYMBOL(kmalloc_node_trace);
-#endif /* !CONFIG_TRACING */
#endif /* !CONFIG_SLOB */
gfp_t kmalloc_fix_flags(gfp_t flags)
void *ret;
size_t ks;
- /* Don't use instrumented ksize to allow precise KASAN poisoning. */
+ /* Check for double-free before calling ksize. */
if (likely(!ZERO_OR_NULL_PTR(p))) {
if (!kasan_check_byte(p))
return NULL;
- ks = kfence_ksize(p) ?: __ksize(p);
+ ks = ksize(p);
} else
ks = 0;
void *mem = (void *)p;
ks = ksize(mem);
- if (ks)
+ if (ks) {
+ kasan_unpoison_range(mem, ks);
memzero_explicit(mem, ks);
+ }
kfree(mem);
}
EXPORT_SYMBOL(kfree_sensitive);
-/**
- * ksize - get the actual amount of memory allocated for a given object
- * @objp: Pointer to the object
- *
- * kmalloc may internally round up allocations and return more memory
- * than requested. ksize() can be used to determine the actual amount of
- * memory allocated. The caller may use this additional memory, even though
- * a smaller amount of memory was initially specified with the kmalloc call.
- * The caller must guarantee that objp points to a valid object previously
- * allocated with either kmalloc() or kmem_cache_alloc(). The object
- * must not be freed during the duration of the call.
- *
- * Return: size of the actual memory used by @objp in bytes
- */
size_t ksize(const void *objp)
{
- size_t size;
-
/*
- * We need to first check that the pointer to the object is valid, and
- * only then unpoison the memory. The report printed from ksize() is
- * more useful, then when it's printed later when the behaviour could
- * be undefined due to a potential use-after-free or double-free.
+ * We need to first check that the pointer to the object is valid.
+ * The KASAN report printed from ksize() is more useful, then when
+ * it's printed later when the behaviour could be undefined due to
+ * a potential use-after-free or double-free.
*
* We use kasan_check_byte(), which is supported for the hardware
* tag-based KASAN mode, unlike kasan_check_read/write().
if (unlikely(ZERO_OR_NULL_PTR(objp)) || !kasan_check_byte(objp))
return 0;
- size = kfence_ksize(objp) ?: __ksize(objp);
- /*
- * We assume that ksize callers could use whole allocated area,
- * so we need to unpoison this area.
- */
- kasan_unpoison_range(objp, size);
- return size;
+ return kfence_ksize(objp) ?: __ksize(objp);
}
EXPORT_SYMBOL(ksize);
my $doc_inline_end = '^\s*\*/\s*$';
my $doc_inline_oneline = '^\s*/\*\*\s*(@[\w\s]+):\s*(.*)\s*\*/\s*$';
my $export_symbol = '^\s*EXPORT_SYMBOL(_GPL)?\s*\(\s*(\w+)\s*\)\s*;';
+my $export_symbol_ns = '^\s*EXPORT_SYMBOL_NS(_GPL)?\s*\(\s*(\w+)\s*,\s*\w+\)\s*;';
my $function_pointer = qr{([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)};
my $attribute = qr{__attribute__\s*\(\([a-z0-9,_\*\s\(\)]*\)\)}i;
print "\n";
}
- print "**Parameters**\n\n";
+ #
+ # Put our descriptive text into a container (thus an HTML <div>) to help
+ # set the function prototypes apart.
+ #
+ print ".. container:: kernelindent\n\n";
$lineprefix = " ";
+ print $lineprefix . "**Parameters**\n\n";
foreach $parameter (@{$args{'parameterlist'}}) {
my $parameter_name = $parameter;
$parameter_name =~ s/\[.*//;
$type = $args{'parametertypes'}{$parameter};
if ($type ne "") {
- print "``$type``\n";
+ print $lineprefix . "``$type``\n";
} else {
- print "``$parameter``\n";
+ print $lineprefix . "``$parameter``\n";
}
print_lineno($parameterdesc_start_lines{$parameter_name});
+ $lineprefix = " ";
if (defined($args{'parameterdescs'}{$parameter_name}) &&
$args{'parameterdescs'}{$parameter_name} ne $undescribed) {
output_highlight_rst($args{'parameterdescs'}{$parameter_name});
} else {
- print " *undescribed*\n";
+ print $lineprefix . "*undescribed*\n";
}
+ $lineprefix = " ";
print "\n";
}
- $lineprefix = $oldprefix;
output_section_rst(@_);
+ $lineprefix = $oldprefix;
}
sub output_section_rst(%) {
my %args = %{$_[0]};
my $section;
my $oldprefix = $lineprefix;
- $lineprefix = "";
foreach $section (@{$args{'sectionlist'}}) {
- print "**$section**\n\n";
+ print $lineprefix . "**$section**\n\n";
print_lineno($section_start_lines{$section});
output_highlight_rst($args{'sections'}{$section});
print "\n";
}
print "\n";
- $lineprefix = $oldprefix;
}
sub output_enum_rst(%) {
my ($parameter);
my $oldprefix = $lineprefix;
my $count;
+ my $outer;
if ($sphinx_major < 3) {
my $name = "enum " . $args{'enum'};
print "\n\n.. c:enum:: " . $name . "\n\n";
}
print_lineno($declaration_start_line);
- $lineprefix = " ";
+ $lineprefix = " ";
output_highlight_rst($args{'purpose'});
print "\n";
- print "**Constants**\n\n";
- $lineprefix = " ";
+ print ".. container:: kernelindent\n\n";
+ $outer = $lineprefix . " ";
+ $lineprefix = $outer . " ";
+ print $outer . "**Constants**\n\n";
foreach $parameter (@{$args{'parameterlist'}}) {
- print "``$parameter``\n";
+ print $outer . "``$parameter``\n";
+
if ($args{'parameterdescs'}{$parameter} ne $undescribed) {
output_highlight_rst($args{'parameterdescs'}{$parameter});
} else {
- print " *undescribed*\n";
+ print $lineprefix . "*undescribed*\n";
}
print "\n";
}
-
+ print "\n";
$lineprefix = $oldprefix;
output_section_rst(@_);
}
}
}
print_lineno($declaration_start_line);
- $lineprefix = " ";
+ $lineprefix = " ";
output_highlight_rst($args{'purpose'});
print "\n";
- print "**Definition**\n\n";
- print "::\n\n";
+ print ".. container:: kernelindent\n\n";
+ print $lineprefix . "**Definition**::\n\n";
my $declaration = $args{'definition'};
- $declaration =~ s/\t/ /g;
- print " " . $args{'type'} . " " . $args{'struct'} . " {\n$declaration };\n\n";
+ $lineprefix = $lineprefix . " ";
+ $declaration =~ s/\t/$lineprefix/g;
+ print $lineprefix . $args{'type'} . " " . $args{'struct'} . " {\n$declaration" . $lineprefix . "};\n\n";
- print "**Members**\n\n";
$lineprefix = " ";
+ print $lineprefix . "**Members**\n\n";
foreach $parameter (@{$args{'parameterlist'}}) {
($parameter =~ /^#/) && next;
($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
$type = $args{'parametertypes'}{$parameter};
print_lineno($parameterdesc_start_lines{$parameter_name});
- print "``" . $parameter . "``\n";
+ print $lineprefix . "``" . $parameter . "``\n";
+ $lineprefix = " ";
output_highlight_rst($args{'parameterdescs'}{$parameter_name});
+ $lineprefix = " ";
print "\n";
}
print "\n";
foreach my $arg (split($splitter, $args)) {
# strip comments
$arg =~ s/\/\*.*\*\///;
+ # ignore argument attributes
+ $arg =~ s/\sPOS0?\s/ /;
# strip leading/trailing spaces
$arg =~ s/^\s*//;
$arg =~ s/\s*$//;
$prototype =~ s/^__inline +//;
$prototype =~ s/^__always_inline +//;
$prototype =~ s/^noinline +//;
+ $prototype =~ s/^__FORTIFY_INLINE +//;
$prototype =~ s/__init +//;
$prototype =~ s/__init_or_module +//;
$prototype =~ s/__deprecated +//;
$prototype =~ s/__weak +//;
$prototype =~ s/__sched +//;
$prototype =~ s/__printf\s*\(\s*\d*\s*,\s*\d*\s*\) +//;
- $prototype =~ s/__alloc_size\s*\(\s*\d+\s*(?:,\s*\d+\s*)?\) +//;
+ $prototype =~ s/__(?:re)?alloc_size\s*\(\s*\d+\s*(?:,\s*\d+\s*)?\) +//;
+ $prototype =~ s/__diagnose_as\s*\(\s*\S+\s*(?:,\s*\d+\s*)*\) +//;
my $define = $prototype =~ s/^#\s*define\s+//; #ak added
$prototype =~ s/__attribute_const__ +//;
$prototype =~ s/__attribute__\s*\(\(
next if (defined($nosymbol_table{$2}));
$function_table{$2} = 1;
}
+ if (/$export_symbol_ns/) {
+ next if (defined($nosymbol_table{$2}));
+ $function_table{$2} = 1;
+ }
}
close(IN);
=item -export
Only output documentation for the symbols that have been exported using
-EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL() in any input FILE or -export-file FILE.
+EXPORT_SYMBOL() and related macros in any input FILE or -export-file FILE.
=item -internal
Only output documentation for the symbols that have NOT been exported using
-EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL() in any input FILE or -export-file FILE.
+EXPORT_SYMBOL() and related macros in any input FILE or -export-file FILE.
=item -function NAME
=item -export-file FILE
-Specify an additional FILE in which to look for EXPORT_SYMBOL() and
-EXPORT_SYMBOL_GPL().
+Specify an additional FILE in which to look for EXPORT_SYMBOL information.
To be used with -export or -internal.
projects / platform / kernel / linux-rpi.git / commitdiff