platform/kernel/linux-rpi.git
13 months agothermal/drivers/qcom/tsens-v0_1: Add mdm9607 correction offsets
Stephan Gerhold [Wed, 7 Jun 2023 10:47:46 +0000 (12:47 +0200)]
thermal/drivers/qcom/tsens-v0_1: Add mdm9607 correction offsets

According to the msm-3.18 vendor kernel from Qualcomm, mdm9607 needs
"correction factors" to adjust for additional offsets observed after the
factory calibration values in the fuses [1, 2].

The fixed offsets should be applied unless there is a special
calibration mode value that indicates that no offsets are needed [3].

Note that the new calibration mode values are called differently in this
patch compared to the vendor kernel:
  - TSENS_TWO_POINT_CALIB_N_WA        -> ONE_PT_CALIB2_NO_OFFSET
  - TSENS_TWO_POINT_CALIB_N_OFFSET_WA -> TWO_PT_CALIB_NO_OFFSET
This is because close inspection of the calibration function [3] reveals
that TSENS_TWO_POINT_CALIB_N_WA is actually a "one point" calibration
because the if statements skip all "point2" related code for it.

[1]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/commit/d9d2db1b82bf3f72f5de0803d55e6849eb5b671e
[2]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/commit/d75aef53a760e8ff7bac54049d00c8b2ee1b193e
[3]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/blob/LE.UM.4.3.2.r1-04200-9x07/drivers/thermal/msm-tsens.c#L2987-3136

Fixes: a2149ab815fc ("thermal/drivers/qcom/tsens-v0_1: Add support for MDM9607")
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230508-msm8909-tsens-v5-3-5eb632235ba7@kernkonzept.com
13 months agothermal/drivers/qcom/tsens-v0_1: Fix mdm9607 slope values
Stephan Gerhold [Wed, 7 Jun 2023 10:47:45 +0000 (12:47 +0200)]
thermal/drivers/qcom/tsens-v0_1: Fix mdm9607 slope values

According to the msm-3.18 vendor kernel from Qualcomm [1], mdm9607 uses
a non-standard slope value of 3000 (instead of 3200) for all sensors.
Fill it properly similar to the 8939 code added recently.

[1]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/blob/LE.UM.4.3.2.r1-04200-9x07/arch/arm/boot/dts/qcom/mdm9607.dtsi#L875

Fixes: a2149ab815fc ("thermal/drivers/qcom/tsens-v0_1: Add support for MDM9607")
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230508-msm8909-tsens-v5-2-5eb632235ba7@kernkonzept.com
13 months agothermal/drivers/qcom/tsens: Drop unused legacy structs
Stephan Gerhold [Wed, 7 Jun 2023 10:47:44 +0000 (12:47 +0200)]
thermal/drivers/qcom/tsens: Drop unused legacy structs

The old single-cell parsing code was removed for MSM8939, MDM9607 and
MSM8976 but for some reason the structs defining the bit positions etc
were kept around (unused). Drop them now.

Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: 51d78b8b1beb ("thermal/drivers/tsens: Drop single-cell code for mdm9607")
Fixes: dfadb4599ab0 ("thermal/drivers/tsens: Drop single-cell code for msm8939")
Fixes: 3a908971f7cb ("thermal/drivers/tsens: Drop single-cell code for msm8976/msm8956")
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230508-msm8909-tsens-v5-1-5eb632235ba7@kernkonzept.com
13 months agodt-bindings: thermal: tsens: Add ipq9574 compatible
Praveenkumar I [Wed, 7 Jun 2023 08:53:08 +0000 (14:23 +0530)]
dt-bindings: thermal: tsens: Add ipq9574 compatible

Qualcomm IPQ9574 has tsens v2.3.1 block, which is similar to IPQ8074 tsens.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Praveenkumar I <quic_ipkumar@quicinc.com>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/ec9799504fe5a141e107bb78955d8d427f00553f.1686125196.git.quic_varada@quicinc.com
13 months agodt-bindings: thermal: convert bcm2835-thermal bindings to YAML
Stefan Wahren [Sun, 4 Jun 2023 12:12:22 +0000 (14:12 +0200)]
dt-bindings: thermal: convert bcm2835-thermal bindings to YAML

Convert the DT binding document for bcm2835-thermal from .txt to YAML.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230604121223.9625-10-stefan.wahren@i2se.com
13 months agothermal: Allow selecting the bang-bang governor as default
Thierry Reding [Fri, 9 Jun 2023 12:44:08 +0000 (14:44 +0200)]
thermal: Allow selecting the bang-bang governor as default

For many setups the bang-bang governor is exactly what we want. Many
ARM SoC-based devices use fans to cool down the entire SoC and that
works well only with the bang-bang governor because it uses the
hysteresis in order to let the fan run for a while to cool the SoC
down below the trip point before switching it off again.

The step-wise governor will behave strangely in these situations. It
doesn't use the hysteresis, so it can lead to situations where the fan
is turned on for only a very brief period and then is switched back off,
only to get switched back on again very quickly because the SoC hasn't
cooled down very much.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20230609124408.3788680-1-thierry.reding@gmail.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
13 months agothermal/drivers/qcom/tsens-v0_1: Add support for MSM8226
Matti Lehtimäki [Sun, 7 May 2023 20:12:21 +0000 (23:12 +0300)]
thermal/drivers/qcom/tsens-v0_1: Add support for MSM8226

The MSM8226 TSENS IP has 6 thermal sensors in a TSENS v0.1 block.
The thermal sensors use non-standard slope values.

Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Luca Weiss <luca@z3ntu.xyz>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230507201225.89694-4-matti.lehtimaki@gmail.com
13 months agodt-bindings: thermal: tsens: Add compatible for MSM8226
Matti Lehtimäki [Sun, 7 May 2023 20:12:20 +0000 (23:12 +0300)]
dt-bindings: thermal: tsens: Add compatible for MSM8226

Qualcomm MSM8226 has tsens v0.1 block.

Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Luca Weiss <luca@z3ntu.xyz>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230507201225.89694-3-matti.lehtimaki@gmail.com
13 months agodrivers/thermal/rcar_gen3_thermal: add reading fuses for Gen4
Wolfram Sang [Thu, 11 May 2023 19:22:19 +0000 (21:22 +0200)]
drivers/thermal/rcar_gen3_thermal: add reading fuses for Gen4

The registers are differently named and at different offsets, but their
functionality is the same as for Gen3.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230511192220.7523-4-wsa+renesas@sang-engineering.com
13 months agodrivers/thermal/rcar_gen3_thermal: refactor reading fuses into seprarate function
Wolfram Sang [Thu, 11 May 2023 19:22:18 +0000 (21:22 +0200)]
drivers/thermal/rcar_gen3_thermal: refactor reading fuses into seprarate function

Gen4 will be very different, so refactor Gen3 access into separate call
first.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230511192220.7523-3-wsa+renesas@sang-engineering.com
13 months agodrivers/thermal/rcar_gen3_thermal: introduce 'info' structure
Wolfram Sang [Thu, 11 May 2023 19:22:17 +0000 (21:22 +0200)]
drivers/thermal/rcar_gen3_thermal: introduce 'info' structure

More items to describe the TSCs are needed soon, so encapsulate the
current 'ths_tj_1' item into a struct.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230511192220.7523-2-wsa+renesas@sang-engineering.com
13 months agodt-bindings: thermal: tsens: Add compatible for SM6375
Konrad Dybcio [Tue, 16 May 2023 11:53:59 +0000 (13:53 +0200)]
dt-bindings: thermal: tsens: Add compatible for SM6375

The Qualcomm SM6375 platform has two instances of the tsens v2.8.0 block,
add a compatible for these instances.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230516-topic-lost_tsens_bindings-v1-2-99715746ddb1@linaro.org
13 months agodt-bindings: thermal: tsens: Add QCM2290
Konrad Dybcio [Tue, 16 May 2023 11:53:58 +0000 (13:53 +0200)]
dt-bindings: thermal: tsens: Add QCM2290

Add the TSENS v2.x controller found on QCM2290.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230516-topic-lost_tsens_bindings-v1-1-99715746ddb1@linaro.org
13 months agoMerge tag 'irqchip-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm...
Thomas Gleixner [Mon, 26 Jun 2023 09:05:49 +0000 (11:05 +0200)]
Merge tag 'irqchip-6.5' of git://git./linux/kernel/git/maz/arm-platforms into irq/core

Pull irqchip updates from Marc Zyngier:

  - A number of Loogson/Loogarch fixes

  - Allow the core code to retrigger an interrupt that has
    fired while the same interrupt is being handled on another
    CPU, papering over a GICv3 architecture issue

  - Work around an integration problem on ASR8601, where the CPU
    numbering isn't representable in the GIC implementation...

  - Add some missing interrupt to the STM32 irqchip

  - A bunch of warning squashing triggered by W=1 builds

Link: https://lore.kernel.org/r/20230623224345.3577134-1-maz@kernel.org
13 months agoMerge tag 'timers-v6.5-rc1' of https://git.linaro.org/people/daniel.lezcano/linux...
Thomas Gleixner [Mon, 26 Jun 2023 09:04:01 +0000 (11:04 +0200)]
Merge tag 'timers-v6.5-rc1' of https://git.linaro.org/people/daniel.lezcano/linux into timers/core

Pull clockevent/source updates from Daniel Lezcano:

  - Fix memory leak on Cadence TTC at probe time (Feng Mingxi)

  - Use the pm_sleep_ptr macro for the Ingenic driver (Paul Cercueil)

  - Relocate the PMW timer Loongson from the mips arch directory to the
    drivers/clocksource (Keguang Zhang)

  - Use the same function names instead of using aliases and move data
    defined in the header to the driver directly as this one is the only
    user of the header file and remove this one on i.MX GPT (Uwe
    Kleine-König)

  - Convert Broadcom Kona family timer bindings to DT schema (Michael
     Kelley)

  - Add DT bindings for Ralink SoCs timer (Sergio Paracuellos)

13 months agox86: xen: add missing prototypes
Arnd Bergmann [Wed, 14 Jun 2023 07:35:01 +0000 (09:35 +0200)]
x86: xen: add missing prototypes

These function are all called from assembler files, or from inline
assembler, so there is no immediate need for a prototype in a header,
but if -Wmissing-prototypes is enabled, the compiler warns about them:

arch/x86/xen/efi.c:130:13: error: no previous prototype for 'xen_efi_init' [-Werror=missing-prototypes]
arch/x86/platform/pvh/enlighten.c:120:13: error: no previous prototype for 'xen_prepare_pvh' [-Werror=missing-prototypes]
arch/x86/xen/enlighten_pv.c:1233:34: error: no previous prototype for 'xen_start_kernel' [-Werror=missing-prototypes]
arch/x86/xen/irq.c:22:14: error: no previous prototype for 'xen_force_evtchn_callback' [-Werror=missing-prototypes]
arch/x86/entry/common.c:302:24: error: no previous prototype for 'xen_pv_evtchn_do_upcall' [-Werror=missing-prototypes]

Declare all of them in an appropriate header file to avoid the warnings.
For consistency, also move the asm_cpu_bringup_and_idle() declaration
out of smp_pv.c.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20230614073501.10101-3-jgross@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
13 months agox86/xen: add prototypes for paravirt mmu functions
Juergen Gross [Wed, 14 Jun 2023 07:35:00 +0000 (09:35 +0200)]
x86/xen: add prototypes for paravirt mmu functions

The paravirt MMU functions called via the PV_CALLEE_SAVE_REGS_THUNK()
macro can't be defined to be static, as the macro is generating a
function via asm() statement calling the paravirt MMU function.

In order to avoid warnings when specifying "-Wmissing-prototypes" for
the build, add local prototypes (there should never be any external
caller of those functions).

Reported-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20230614073501.10101-2-jgross@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
13 months agoiscsi_ibft: Fix finding the iBFT under Xen Dom 0
Ross Lagerwall [Mon, 5 Jun 2023 10:28:40 +0000 (11:28 +0100)]
iscsi_ibft: Fix finding the iBFT under Xen Dom 0

To facilitate diskless iSCSI boot, the firmware can place a table of
configuration details in memory called the iBFT. The presence of this
table is not specified, nor is the precise location (and it's not in the
E820) so the kernel has to search for a magic marker to find it.

When running under Xen, Dom 0 does not have access to the entire host's
memory, only certain regions which are identity-mapped which means that
the pseudo-physical address in Dom0 == real host physical address.
Add the iBFT search bounds as a reserved region which causes it to be
identity-mapped in xen_set_identity_and_remap_chunk() which allows Dom0
access to the specific physical memory to correctly search for the iBFT
magic marker (and later access the full table).

This necessitates moving the call to reserve_ibft_region() somewhat
later so that it is called after e820__memory_setup() which is when the
Xen identity mapping adjustments are applied. The precise location of
the call is not too important so I've put it alongside dmi_setup() which
does similar scanning of memory for configuration tables.

Finally in the iBFT find code, instead of using isa_bus_to_virt() which
doesn't do the right thing under Xen, use early_memremap() like the
dmi_setup() code does.

The result of these changes is that it is possible to boot a diskless
Xen + Dom0 running off an iSCSI disk whereas previously it would fail to
find the iBFT and consequently, the iSCSI root disk.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Acked-by: Konrad Rzeszutek Wilk <konrad@darnok.org>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com> # for x86
Link: https://lore.kernel.org/r/20230605102840.1521549-1-ross.lagerwall@citrix.com
Signed-off-by: Juergen Gross <jgross@suse.com>
13 months agoxen: xen_debug_interrupt prototype to global header
Arnd Bergmann [Wed, 17 May 2023 12:45:07 +0000 (14:45 +0200)]
xen: xen_debug_interrupt prototype to global header

The xen_debug_interrupt() function is only called on x86, which has a
prototype in an architecture specific header, but the definition also
exists on others, where the lack of a prototype causes a W=1 warning:

drivers/xen/events/events_2l.c:264:13: error: no previous prototype for 'xen_debug_interrupt' [-Werror=missing-prototypes]

Move the prototype into a global header instead to avoid this warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/20230517124525.929201-1-arnd@kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
13 months agoLinux 6.4
Linus Torvalds [Sun, 25 Jun 2023 23:29:58 +0000 (16:29 -0700)]
Linux 6.4

13 months agoMerge tag 'i2c-for-6.4-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Sun, 25 Jun 2023 22:36:01 +0000 (15:36 -0700)]
Merge tag 'i2c-for-6.4-rc8' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "Nothing fancy. Two driver and one DT binding fix"

* tag 'i2c-for-6.4-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: imx-lpi2c: fix type char overflow issue when calculating the clock cycle
  i2c: qup: Add missing unwind goto in qup_i2c_probe()
  dt-bindings: i2c: opencores: Add missing type for "regstep"

13 months agoMerge tag 'perf_urgent_for_v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 25 Jun 2023 17:13:17 +0000 (10:13 -0700)]
Merge tag 'perf_urgent_for_v6.4' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Borislav Petkov:

 - Drop the __weak attribute from a function prototype as it otherwise
   leads to the function getting replaced by a dummy stub

 - Fix the umask value setup of the frontend event as former is
   different on two Intel cores

* tag 'perf_urgent_for_v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel: Fix the FRONTEND encoding on GNR and MTL
  perf/core: Drop __weak attribute from arch_perf_update_userpage() prototype

13 months agoMerge tag 'objtool_urgent_for_v6.4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 25 Jun 2023 17:00:17 +0000 (10:00 -0700)]
Merge tag 'objtool_urgent_for_v6.4' of git://git./linux/kernel/git/tip/tip

Pull objtool fix from Borislav Petkov:

 - Add a ORC format hash to vmlinux and modules in order for other tools
   which use it, to detect changes to it and adapt accordingly

* tag 'objtool_urgent_for_v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/unwind/orc: Add ELF section with ORC version identifier

13 months agoMerge tag 'x86_urgent_for_v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 25 Jun 2023 16:47:04 +0000 (09:47 -0700)]
Merge tag 'x86_urgent_for_v6.4' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:

 - Do not use set_pgd() when updating the KASLR trampoline pgd entry
   because that updates the user PGD too on KPTI builds, resulting in
   memory corruption

 - Prevent a panic in the IO-APIC setup code due to conflicting command
   line parameters

* tag 'x86_urgent_for_v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/apic: Fix kernel panic when booting with intremap=off and x2apic_phys
  x86/mm: Avoid using set_pgd() outside of real PGD pages

13 months agoxtensa: dump userspace code around the exception PC
Max Filippov [Sun, 7 May 2023 23:18:17 +0000 (16:18 -0700)]
xtensa: dump userspace code around the exception PC

In the absence of other debug facilities dumping user code around the
unhandled exception address may help debugging the issue.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
13 months agoMerge tag 'drm-fixes-2023-06-23' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 23 Jun 2023 23:33:26 +0000 (16:33 -0700)]
Merge tag 'drm-fixes-2023-06-23' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Very quiet last week, just two misc fixes, one dp-mst and one qaic:

  qaic:
   - dma-buf import fix

  dp-mst:
   - fix NULL ptr deref"

[ It turns out it was a quiet week because Alex Deucher hadn't sent in
  his pending AMD changes. So they are coming next    - Linus ]

* tag 'drm-fixes-2023-06-23' of git://anongit.freedesktop.org/drm/drm:
  drm: use mgr->dev in drm_dbg_kms in drm_dp_add_payload_part2
  accel/qaic: Call DRM helper function to destroy prime GEM

13 months agoMerge tag 'arm-fixes-6.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Linus Torvalds [Fri, 23 Jun 2023 23:21:59 +0000 (16:21 -0700)]
Merge tag 'arm-fixes-6.4-3' of git://git./linux/kernel/git/soc/soc

Pull ARM SoC fixes from Arnd Bergmann:
 "The final bug fixes for Qualcomm and Rockchips came in, all of them
  for devicetree files:

   - Devices on Qualcomm SC7180/SC7280 that are cache coherent are now
     marked so correctly to fix a regression after a change in kernel
     behavior

   - Rockchips has a few minor changes for correctness of regulator and
     cache properties, as well as fixes for incorrect behavior of the
     RK3568 PCI controller and reset pins on two boards"

* tag 'arm-fixes-6.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  arm64: dts: qcom: sc7280: Mark SCM as dma-coherent for chrome devices
  arm64: dts: qcom: sc7180: Mark SCM as dma-coherent for trogdor
  arm64: dts: qcom: sc7180: Mark SCM as dma-coherent for IDP
  dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent
  arm64: dts: rockchip: Fix rk356x PCIe register and range mappings
  arm64: dts: rockchip: fix button reset pin for nanopi r5c
  arm64: dts: rockchip: fix nEXTRST on SOQuartz
  arm64: dts: rockchip: add missing cache properties
  arm64: dts: rockchip: fix USB regulator on ROCK64

13 months agoMerge tag 'for-6.4-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
Linus Torvalds [Fri, 23 Jun 2023 23:09:53 +0000 (16:09 -0700)]
Merge tag 'for-6.4-rc7-tag' of git://git./linux/kernel/git/kdave/linux

Pull btrfs fix from David Sterba:
 "Unfortunately the recent u32 overflow fix was not complete, there was
  one conversion left, assertion not triggered by my tests but caught by
  Qu's fstests case.

  The "cleanup for later" has been promoted to a proper fix and wraps
  all uses of the stripe left shift so the diffstat has grown but leaves
  no potentially problematic uses.

  We should have done it that way before, sorry"

* tag 'for-6.4-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: fix remaining u32 overflows when left shifting stripe_nr

13 months agoMerge tag 'block-6.4-2023-06-23' of git://git.kernel.dk/linux
Linus Torvalds [Fri, 23 Jun 2023 23:04:35 +0000 (16:04 -0700)]
Merge tag 'block-6.4-2023-06-23' of git://git.kernel.dk/linux

Pull block fix from Jens Axboe:
 "It's apparently the week of 'fixup something from last week', because
  the same is true for this block pull request.

  Fix up a lock grab that needs to be IRQ saving, rather than just IRQ
  disabling, in the block cgroup code"

* tag 'block-6.4-2023-06-23' of git://git.kernel.dk/linux:
  block: make sure local irq is disabled when calling __blkcg_rstat_flush

13 months agoMerge tag 'iommu-fix-v6.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...
Linus Torvalds [Fri, 23 Jun 2023 22:56:44 +0000 (15:56 -0700)]
Merge tag 'iommu-fix-v6.4-rc7' of git://git./linux/kernel/git/joro/iommu

Pull iommu fix from Joerg Roedel:

 - Fix potential memory leak in AMD IOMMU domain allocation path

* tag 'iommu-fix-v6.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Fix possible memory leak of 'domain'

13 months agoMerge tag 'sound-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Linus Torvalds [Fri, 23 Jun 2023 22:43:01 +0000 (15:43 -0700)]
Merge tag 'sound-6.4' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Three oneliner fixes: one for a thinko in SOF SoundWire code and two
  HD-audio quirks for ASUS laptops. All device-specific and should be
  safe to apply"

* tag 'sound-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek: Add quirk for ASUS ROG GV601V
  ALSA: hda/realtek: Add quirk for ASUS ROG G634Z
  ASoC: intel: sof_sdw: Fixup typo in device link checking

13 months agoMerge tag 'gpio-fixes-for-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 23 Jun 2023 22:24:09 +0000 (15:24 -0700)]
Merge tag 'gpio-fixes-for-v6.4' of git://git./linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:

 - fix IRQ initialization in gpiochip_irqchip_add_domain()

 - add a missing return value check for platform_get_irq() in
   gpio-sifive

 - don't free irq_domains which GPIOLIB does not manage

* tag 'gpio-fixes-for-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpiolib: Fix irq_domain resource tracking for gpiochip_irqchip_add_domain()
  gpio: sifive: add missing check for platform_get_irq
  gpiolib: Fix GPIO chip IRQ initialization restriction

13 months agoMerge tag 'qcom-arm64-fixes-for-6.4-2' of https://git.kernel.org/pub/scm/linux/kernel...
Arnd Bergmann [Fri, 23 Jun 2023 20:13:22 +0000 (22:13 +0200)]
Merge tag 'qcom-arm64-fixes-for-6.4-2' of https://git./linux/kernel/git/qcom/linux into arm/fixes

One last Qualcomm ARM64 DeviceTree fix for v6.4

Changes related to cache management for DMA memory caused WiFi to stop
work on SC7180 and SC7280 based products, using TF-A. These changes
marks the relevant device dma-coherent to correct the behavior.

* tag 'qcom-arm64-fixes-for-6.4-2' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux:
  arm64: dts: qcom: sc7280: Mark SCM as dma-coherent for chrome devices
  arm64: dts: qcom: sc7180: Mark SCM as dma-coherent for trogdor
  arm64: dts: qcom: sc7180: Mark SCM as dma-coherent for IDP
  dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent

Link: https://lore.kernel.org/r/20230622203248.106422-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
13 months agoworkqueue: clean up WORK_* constant types, clarify masking
Linus Torvalds [Fri, 23 Jun 2023 19:08:14 +0000 (12:08 -0700)]
workqueue: clean up WORK_* constant types, clarify masking

Dave Airlie reports that gcc-13.1.1 has started complaining about some
of the workqueue code in 32-bit arm builds:

  kernel/workqueue.c: In function ‘get_work_pwq’:
  kernel/workqueue.c:713:24: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
    713 |                 return (void *)(data & WORK_STRUCT_WQ_DATA_MASK);
        |                        ^
  [ ... a couple of other cases ... ]

and while it's not immediately clear exactly why gcc started complaining
about it now, I suspect it's some C23-induced enum type handlign fixup in
gcc-13 is the cause.

Whatever the reason for starting to complain, the code and data types
are indeed disgusting enough that the complaint is warranted.

The wq code ends up creating various "helper constants" (like that
WORK_STRUCT_WQ_DATA_MASK) using an enum type, which is all kinds of
confused.  The mask needs to be 'unsigned long', not some unspecified
enum type.

To make matters worse, the actual "mask and cast to a pointer" is
repeated a couple of times, and the cast isn't even always done to the
right pointer, but - as the error case above - to a 'void *' with then
the compiler finishing the job.

That's now how we roll in the kernel.

So create the masks using the proper types rather than some ambiguous
enumeration, and use a nice helper that actually does the type
conversion in one well-defined place.

Incidentally, this magically makes clang generate better code.  That,
admittedly, is really just a sign of clang having been seriously
confused before, and cleaning up the typing unconfuses the compiler too.

Reported-by: Dave Airlie <airlied@gmail.com>
Link: https://lore.kernel.org/lkml/CAPM=9twNnV4zMCvrPkw3H-ajZOH-01JVh_kDrxdPYQErz8ZTdA@mail.gmail.com/
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Tejun Heo <tj@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 months agoMerge branch 'for-next/feat_s1pie' into for-next/core
Catalin Marinas [Fri, 23 Jun 2023 17:34:16 +0000 (18:34 +0100)]
Merge branch 'for-next/feat_s1pie' into for-next/core

* for-next/feat_s1pie:
  : Support for the Armv8.9 Permission Indirection Extensions (stage 1 only)
  KVM: selftests: get-reg-list: add Permission Indirection registers
  KVM: selftests: get-reg-list: support ID register features
  arm64: Document boot requirements for PIE
  arm64: transfer permission indirection settings to EL2
  arm64: enable Permission Indirection Extension (PIE)
  arm64: add encodings of PIRx_ELx registers
  arm64: disable EL2 traps for PIE
  arm64: reorganise PAGE_/PROT_ macros
  arm64: add PTE_WRITE to PROT_SECT_NORMAL
  arm64: add PTE_UXN/PTE_WRITE to SWAPPER_*_FLAGS
  KVM: arm64: expose ID_AA64MMFR3_EL1 to guests
  KVM: arm64: Save/restore PIE registers
  KVM: arm64: Save/restore TCR2_EL1
  arm64: cpufeature: add Permission Indirection Extension cpucap
  arm64: cpufeature: add TCR2 cpucap
  arm64: cpufeature: add system register ID_AA64MMFR3
  arm64/sysreg: add PIR*_ELx registers
  arm64/sysreg: update HCRX_EL2 register
  arm64/sysreg: add system registers TCR2_ELx
  arm64/sysreg: Add ID register ID_AA64MMFR3

13 months agoMerge branches 'for-next/kpti', 'for-next/missing-proto-warn', 'for-next/iss2-decode...
Catalin Marinas [Fri, 23 Jun 2023 17:32:20 +0000 (18:32 +0100)]
Merge branches 'for-next/kpti', 'for-next/missing-proto-warn', 'for-next/iss2-decode', 'for-next/kselftest', 'for-next/misc', 'for-next/feat_mops', 'for-next/module-alloc', 'for-next/sysreg', 'for-next/cpucap', 'for-next/acpi', 'for-next/kdump', 'for-next/acpi-doc', 'for-next/doc' and 'for-next/tpidr2-fix', remote-tracking branch 'arm64/for-next/perf' into for-next/core

* arm64/for-next/perf:
  docs: perf: Fix warning from 'make htmldocs' in hisi-pmu.rst
  docs: perf: Add new description for HiSilicon UC PMU
  drivers/perf: hisi: Add support for HiSilicon UC PMU driver
  drivers/perf: hisi: Add support for HiSilicon H60PA and PAv3 PMU driver
  perf: arm_cspmu: Add missing MODULE_DEVICE_TABLE
  perf/arm-cmn: Add sysfs identifier
  perf/arm-cmn: Revamp model detection
  perf/arm_dmc620: Add cpumask
  dt-bindings: perf: fsl-imx-ddr: Add i.MX93 compatible
  drivers/perf: imx_ddr: Add support for NXP i.MX9 SoC DDRC PMU driver
  perf/arm_cspmu: Decouple APMT dependency
  perf/arm_cspmu: Clean up ACPI dependency
  ACPI/APMT: Don't register invalid resource
  perf/arm_cspmu: Fix event attribute type
  perf: arm_cspmu: Set irq affinitiy only if overflow interrupt is used
  drivers/perf: hisi: Don't migrate perf to the CPU going to teardown
  drivers/perf: apple_m1: Force 63bit counters for M2 CPUs
  perf/arm-cmn: Fix DTC reset
  perf: qcom_l2_pmu: Make l2_cache_pmu_probe_cluster() more robust
  perf/arm-cci: Slightly optimize cci_pmu_sync_counters()

* for-next/kpti:
  : Simplify KPTI trampoline exit code
  arm64: entry: Simplify tramp_alias macro and tramp_exit routine
  arm64: entry: Preserve/restore X29 even for compat tasks

* for-next/missing-proto-warn:
  : Address -Wmissing-prototype warnings
  arm64: add alt_cb_patch_nops prototype
  arm64: move early_brk64 prototype to header
  arm64: signal: include asm/exception.h
  arm64: kaslr: add kaslr_early_init() declaration
  arm64: flush: include linux/libnvdimm.h
  arm64: module-plts: inline linux/moduleloader.h
  arm64: hide unused is_valid_bugaddr()
  arm64: efi: add efi_handle_corrupted_x18 prototype
  arm64: cpuidle: fix #ifdef for acpi functions
  arm64: kvm: add prototypes for functions called in asm
  arm64: spectre: provide prototypes for internal functions
  arm64: move cpu_suspend_set_dbg_restorer() prototype to header
  arm64: avoid prototype warnings for syscalls
  arm64: add scs_patch_vmlinux prototype
  arm64: xor-neon: mark xor_arm64_neon_*() static

* for-next/iss2-decode:
  : Add decode of ISS2 to data abort reports
  arm64/esr: Add decode of ISS2 to data abort reporting
  arm64/esr: Use GENMASK() for the ISS mask

* for-next/kselftest:
  : Various arm64 kselftest improvements
  kselftest/arm64: Log signal code and address for unexpected signals
  kselftest/arm64: Add a smoke test for ptracing hardware break/watch points

* for-next/misc:
  : Miscellaneous patches
  arm64: alternatives: make clean_dcache_range_nopatch() noinstr-safe
  arm64: hibernate: remove WARN_ON in save_processor_state
  arm64/fpsimd: Exit streaming mode when flushing tasks
  arm64: mm: fix VA-range sanity check
  arm64/mm: remove now-superfluous ISBs from TTBR writes
  arm64: consolidate rox page protection logic
  arm64: set __exception_irq_entry with __irq_entry as a default
  arm64: syscall: unmask DAIF for tracing status
  arm64: lockdep: enable checks for held locks when returning to userspace
  arm64/cpucaps: increase string width to properly format cpucaps.h
  arm64/cpufeature: Use helper for ECV CNTPOFF cpufeature

* for-next/feat_mops:
  : Support for ARMv8.8 memcpy instructions in userspace
  kselftest/arm64: add MOPS to hwcap test
  arm64: mops: allow disabling MOPS from the kernel command line
  arm64: mops: detect and enable FEAT_MOPS
  arm64: mops: handle single stepping after MOPS exception
  arm64: mops: handle MOPS exceptions
  KVM: arm64: hide MOPS from guests
  arm64: mops: don't disable host MOPS instructions from EL2
  arm64: mops: document boot requirements for MOPS
  KVM: arm64: switch HCRX_EL2 between host and guest
  arm64: cpufeature: detect FEAT_HCX
  KVM: arm64: initialize HCRX_EL2

* for-next/module-alloc:
  : Make the arm64 module allocation code more robust (clean-up, VA range expansion)
  arm64: module: rework module VA range selection
  arm64: module: mandate MODULE_PLTS
  arm64: module: move module randomization to module.c
  arm64: kaslr: split kaslr/module initialization
  arm64: kasan: remove !KASAN_VMALLOC remnants
  arm64: module: remove old !KASAN_VMALLOC logic

* for-next/sysreg: (21 commits)
  : More sysreg conversions to automatic generation
  arm64/sysreg: Convert TRBIDR_EL1 register to automatic generation
  arm64/sysreg: Convert TRBTRG_EL1 register to automatic generation
  arm64/sysreg: Convert TRBMAR_EL1 register to automatic generation
  arm64/sysreg: Convert TRBSR_EL1 register to automatic generation
  arm64/sysreg: Convert TRBBASER_EL1 register to automatic generation
  arm64/sysreg: Convert TRBPTR_EL1 register to automatic generation
  arm64/sysreg: Convert TRBLIMITR_EL1 register to automatic generation
  arm64/sysreg: Rename TRBIDR_EL1 fields per auto-gen tools format
  arm64/sysreg: Rename TRBTRG_EL1 fields per auto-gen tools format
  arm64/sysreg: Rename TRBMAR_EL1 fields per auto-gen tools format
  arm64/sysreg: Rename TRBSR_EL1 fields per auto-gen tools format
  arm64/sysreg: Rename TRBBASER_EL1 fields per auto-gen tools format
  arm64/sysreg: Rename TRBPTR_EL1 fields per auto-gen tools format
  arm64/sysreg: Rename TRBLIMITR_EL1 fields per auto-gen tools format
  arm64/sysreg: Convert OSECCR_EL1 to automatic generation
  arm64/sysreg: Convert OSDTRTX_EL1 to automatic generation
  arm64/sysreg: Convert OSDTRRX_EL1 to automatic generation
  arm64/sysreg: Convert OSLAR_EL1 to automatic generation
  arm64/sysreg: Standardise naming of bitfield constants in OSL[AS]R_EL1
  arm64/sysreg: Convert MDSCR_EL1 to automatic register generation
  ...

* for-next/cpucap:
  : arm64 cpucap clean-up
  arm64: cpufeature: fold cpus_set_cap() into update_cpu_capabilities()
  arm64: cpufeature: use cpucap naming
  arm64: alternatives: use cpucap naming
  arm64: standardise cpucap bitmap names

* for-next/acpi:
  : Various arm64-related ACPI patches
  ACPI: bus: Consolidate all arm specific initialisation into acpi_arm_init()

* for-next/kdump:
  : Simplify the crashkernel reservation behaviour of crashkernel=X,high on arm64
  arm64: add kdump.rst into index.rst
  Documentation: add kdump.rst to present crashkernel reservation on arm64
  arm64: kdump: simplify the reservation behaviour of crashkernel=,high

* for-next/acpi-doc:
  : Update ACPI documentation for Arm systems
  Documentation/arm64: Update ACPI tables from BBR
  Documentation/arm64: Update references in arm-acpi
  Documentation/arm64: Update ARM and arch reference

* for-next/doc:
  : arm64 documentation updates
  Documentation/arm64: Add ptdump documentation

* for-next/tpidr2-fix:
  : Fix the TPIDR2_EL0 register restoring on sigreturn
  kselftest/arm64: Add a test case for TPIDR2 restore
  arm64/signal: Restore TPIDR2 register rather than memory state

13 months agokselftest/arm64: Add a test case for TPIDR2 restore
Mark Brown [Thu, 22 Jun 2023 13:39:46 +0000 (14:39 +0100)]
kselftest/arm64: Add a test case for TPIDR2 restore

Due to the fact that TPIDR2 is intended to be managed by libc we don't
currently test modifying it via the signal context since that might
disrupt libc's usage of it and cause instability. We can however test the
opposite case with less risk, modifying TPIDR2 in a signal handler and
making sure that the original value is restored after returning from the
signal handler. Add a test which does this.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230621-arm64-fix-tpidr2-signal-restore-v2-2-c8e8fcc10302@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
13 months agoarm64/signal: Restore TPIDR2 register rather than memory state
Mark Brown [Thu, 22 Jun 2023 13:39:45 +0000 (14:39 +0100)]
arm64/signal: Restore TPIDR2 register rather than memory state

Currently when restoring the TPIDR2 signal context we set the new value
from the signal frame in the thread data structure but not the register,
following the pattern for the rest of the data we are restoring. This does
not work in the case of TPIDR2, the register always has the value for the
current task. This means that either we return to userspace and ignore the
new value or we context switch and save the register value on top of the
newly restored value.

Load the value from the signal context into the register instead.

Fixes: 39e54499280f ("arm64/signal: Include TPIDR2 in the signal context")
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: <stable@vger.kernel.org> # 6.3.x
Link: https://lore.kernel.org/r/20230621-arm64-fix-tpidr2-signal-restore-v2-1-c8e8fcc10302@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
13 months agoscsi/sg: don't grab scsi host module reference
Yu Kuai [Wed, 21 Jun 2023 16:01:11 +0000 (00:01 +0800)]
scsi/sg: don't grab scsi host module reference

In order to prevent request_queue to be freed before cleaning up
blktrace debugfs entries, commit db59133e9279 ("scsi: sg: fix blktrace
debugfs entries leakage") use scsi_device_get(), however,
scsi_device_get() will also grab scsi module reference and scsi module
can't be removed.

It's reported that blktests can't unload scsi_debug after block/001:

blktests (master) # ./check block
block/001 (stress device hotplugging) [failed]
     +++ /root/blktests/results/nodev/block/001.out.bad 2023-06-19
      Running block/001
      Stressing sd
     +modprobe: FATAL: Module scsi_debug is in use.

Fix this problem by grabbing request_queue reference directly, so that
scsi host module can still be unloaded while request_queue will be
pinged by sg device.

Reported-by: Chaitanya Kulkarni <chaitanyak@nvidia.com>
Link: https://lore.kernel.org/all/1760da91-876d-fc9c-ab51-999a6f66ad50@nvidia.com/
Fixes: db59133e9279 ("scsi: sg: fix blktrace debugfs entries leakage")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230621160111.1433521-1-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoio_uring: merge conditional unlock flush helpers
Pavel Begunkov [Fri, 23 Jun 2023 11:23:31 +0000 (12:23 +0100)]
io_uring: merge conditional unlock flush helpers

There is no reason not to use __io_cq_unlock_post_flush for intermediate
aux CQE flushing, all ->task_complete should apply there, i.e. if set it
should be the submitter task. Combine them, get rid of of
__io_cq_unlock_post() and rename the left function.

This place was also taking a couple percents of CPU according to
profiles for max throughput net benchmarks due to multishot recv
flooding it with completions.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/bbed60734cbec2e833d9c7bdcf9741aada5d8aab.1687518903.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoio_uring: make io_cq_unlock_post static
Pavel Begunkov [Fri, 23 Jun 2023 11:23:30 +0000 (12:23 +0100)]
io_uring: make io_cq_unlock_post static

io_cq_unlock_post() is exclusively used in io_uring/io_uring.c, mark it
static and don't expose to other files.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/3dc8127dda4514e1dd24bb32035faac887c5fa37.1687518903.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoio_uring: inline __io_cq_unlock
Pavel Begunkov [Fri, 23 Jun 2023 11:23:29 +0000 (12:23 +0100)]
io_uring: inline __io_cq_unlock

__io_cq_unlock is not very helpful, and users should be calling flush
variants anyway. Open code the function.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d875c4cfb69f38ccecb58a57111446c77a614caa.1687518903.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoio_uring: fix acquire/release annotations
Pavel Begunkov [Fri, 23 Jun 2023 11:23:28 +0000 (12:23 +0100)]
io_uring: fix acquire/release annotations

We do conditional locking, so __io_cq_lock() and friends not always
actually grab/release the lock, so kill misleading annotations.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/2a098f9144c24cab622f8bf90b39f44da5d0401e.1687518903.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoio_uring: kill io_cq_unlock()
Pavel Begunkov [Fri, 23 Jun 2023 11:23:27 +0000 (12:23 +0100)]
io_uring: kill io_cq_unlock()

We're abusing ->completion_lock helpers. io_cq_unlock() neither
locking conditionally nor doing CQE flushing, which means that callers
must have some side reason of taking the lock and should do it directly.

Open code io_cq_unlock() into io_cqring_overflow_kill() and clean it up.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/7dabb36856db2b562e78780480396c52c29b2bf4.1687518903.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoio_uring: remove IOU_F_TWQ_FORCE_NORMAL
Pavel Begunkov [Fri, 23 Jun 2023 11:23:26 +0000 (12:23 +0100)]
io_uring: remove IOU_F_TWQ_FORCE_NORMAL

Extract a function for non-local task_work_add, and use it directly from
io_move_task_work_from_local(). Now we don't use IOU_F_TWQ_FORCE_NORMAL
and it can be killed.

As a small positive side effect we don't grab task->io_uring in
io_req_normal_work_add anymore, which is not needed for
io_req_local_work_add().

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/2e55571e8ff2927ae3cc12da606d204e2485525b.1687518903.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoio_uring: don't batch task put on reqs free
Pavel Begunkov [Fri, 23 Jun 2023 11:23:25 +0000 (12:23 +0100)]
io_uring: don't batch task put on reqs free

We're trying to batch io_put_task() in io_free_batch_list(), but
considering that the hot path is a simple inc, it's most cerainly and
probably faster to just do io_put_task() instead of task tracking.

We don't care about io_put_task_remote() as it's only for IOPOLL
where polling/waiting is done by not the submitter task.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/4a7ef7dce845fe2bd35507bf389d6bd2d5c1edf0.1687518903.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoio_uring: move io_clean_op()
Pavel Begunkov [Fri, 23 Jun 2023 11:23:24 +0000 (12:23 +0100)]
io_uring: move io_clean_op()

Move io_clean_op() up in the source file and remove the forward
declaration, as the function doesn't have tricky dependencies
anymore.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/1b7163b2ba7c3a8322d972c79c1b0a9301b3057e.1687518903.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoio_uring: inline io_dismantle_req()
Pavel Begunkov [Fri, 23 Jun 2023 11:23:23 +0000 (12:23 +0100)]
io_uring: inline io_dismantle_req()

io_dismantle_req() is only used in __io_req_complete_post(), open code
it there.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/ba8f20cb2c914eefa2e7d120a104a198552050db.1687518903.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoio_uring: remove io_free_req_tw
Pavel Begunkov [Fri, 23 Jun 2023 11:23:22 +0000 (12:23 +0100)]
io_uring: remove io_free_req_tw

Request completion is a very hot path in general, but there are 3 places
that can be doing it: io_free_batch_list(), io_req_complete_post() and
io_free_req_tw().

io_free_req_tw() is used rather marginally and we don't care about it.
Killing it can help to clean up and optimise the left two, do that by
replacing it with io_req_task_complete().

There are two things to consider:
1) io_free_req() is called when all refs are put, so we need to reinit
   references. The easiest way to do that is to clear REQ_F_REFCOUNT.
2) We also don't need a cqe from it, so silence it with REQ_F_CQE_SKIP.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/434a2be8f33d474ad888ce1c17fe5ea7bbcb2a55.1687518903.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoio_uring: open code io_put_req_find_next
Pavel Begunkov [Fri, 23 Jun 2023 11:23:21 +0000 (12:23 +0100)]
io_uring: open code io_put_req_find_next

There is only one user of io_put_req_find_next() and it doesn't make
much sense to have it. Open code the function.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/38b5c5e48e4adc8e6a0cd16fdd5c1531d7ff81a9.1687518903.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoext4: Fix warning in blkdev_put()
Jan Kara [Thu, 22 Jun 2023 16:51:07 +0000 (18:51 +0200)]
ext4: Fix warning in blkdev_put()

ext4_blkdev_remove() passes a wrong holder pointer to blkdev_put() which
triggers a warning there. Fix it.

Fixes: 2736e8eeb0cc ("block: use the holder as indication for exclusive opens")
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230622165107.13687-1-jack@suse.cz
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoi2c: imx-lpi2c: fix type char overflow issue when calculating the clock cycle
Clark Wang [Mon, 29 May 2023 08:02:51 +0000 (16:02 +0800)]
i2c: imx-lpi2c: fix type char overflow issue when calculating the clock cycle

Claim clkhi and clklo as integer type to avoid possible calculation
errors caused by data overflow.

Fixes: a55fa9d0e42e ("i2c: imx-lpi2c: add low power i2c bus driver")
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Signed-off-by: Carlos Song <carlos.song@nxp.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
13 months agoi2c: qup: Add missing unwind goto in qup_i2c_probe()
Shuai Jiang [Tue, 18 Apr 2023 13:56:12 +0000 (21:56 +0800)]
i2c: qup: Add missing unwind goto in qup_i2c_probe()

Smatch Warns:
drivers/i2c/busses/i2c-qup.c:1784 qup_i2c_probe()
warn: missing unwind goto?

The goto label "fail_runtime" and "fail" will disable qup->pclk,
but here qup->pclk failed to obtain, in order to be consistent,
change the direct return to goto label "fail_dma".

Fixes: 9cedf3b2f099 ("i2c: qup: Add bam dma capabilities")
Signed-off-by: Shuai Jiang <d202180596@hust.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Cc: <stable@vger.kernel.org> # v4.6+
13 months agodt-bindings: i2c: opencores: Add missing type for "regstep"
Rob Herring [Tue, 13 Jun 2023 20:11:04 +0000 (14:11 -0600)]
dt-bindings: i2c: opencores: Add missing type for "regstep"

"regstep" may be deprecated, but it still needs a type.

Fixes: 8ad69f490516 ("dt-bindings: i2c: convert ocores binding to yaml")
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
13 months agoclocksource/drivers/cadence-ttc: Fix memory leak in ttc_timer_probe
Feng Mingxi [Tue, 25 Apr 2023 06:56:11 +0000 (06:56 +0000)]
clocksource/drivers/cadence-ttc: Fix memory leak in ttc_timer_probe

Smatch reports:
drivers/clocksource/timer-cadence-ttc.c:529 ttc_timer_probe()
warn: 'timer_baseaddr' from of_iomap() not released on lines: 498,508,516.

timer_baseaddr may have the problem of not being released after use,
I replaced it with the devm_of_iomap() function and added the clk_put()
function to cleanup the "clk_ce" and "clk_cs".

Fixes: e932900a3279 ("arm: zynq: Use standard timer binding")
Fixes: 70504f311d4b ("clocksource/drivers/cadence_ttc: Convert init function to return error")
Signed-off-by: Feng Mingxi <m202271825@hust.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Acked-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230425065611.702917-1-m202271825@hust.edu.cn
13 months agodt-bindings: timers: Add Ralink SoCs timer
Sergio Paracuellos [Tue, 20 Jun 2023 10:02:31 +0000 (12:02 +0200)]
dt-bindings: timers: Add Ralink SoCs timer

Add YAML documentation for the timer which is present on Ralink SoCs.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230620100231.1412582-1-sergio.paracuellos@gmail.com
13 months agoclocksource/drivers/hyper-v: Rework clocksource and sched clock setup
Michael Kelley [Mon, 19 Jun 2023 19:02:40 +0000 (12:02 -0700)]
clocksource/drivers/hyper-v: Rework clocksource and sched clock setup

Current code assigns either the Hyper-V TSC page or MSR-based ref counter
as the sched clock. This may be sub-optimal in two cases. First, if there
is hardware support to ensure consistent TSC frequency across live
migrations and Hyper-V is using that support, the raw TSC is a faster
source of time than the Hyper-V TSC page.  Second, the MSR-based ref
counter is relatively slow because reads require a trap to the hypervisor.
As such, it should never be used as the sched clock. The native sched
clock based on the raw TSC or jiffies is much better.

Rework the sched clock setup so it is set to the TSC page only if
Hyper-V indicates that the TSC may have inconsistent frequency across
live migrations. Also, remove the code that sets the sched clock to
the MSR-based ref counter. In the cases where it is not set, the sched
clock will then be the native sched clock.

As part of the rework, always enable both the TSC page clocksource and
the MSR-based ref counter clocksource. Set the ratings so the TSC page
clocksource is preferred. While the MSR-based ref counter clocksource
is unlikely to ever be the default, having it available for manual
selection is convenient for development purposes.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/1687201360-16003-1-git-send-email-mikelley@microsoft.com
13 months agodt-bindings: timer: brcm,kona-timer: convert to YAML
Stanislav Jakubek [Sun, 18 Jun 2023 14:46:35 +0000 (16:46 +0200)]
dt-bindings: timer: brcm,kona-timer: convert to YAML

Convert Broadcom Kona family timer bindings to DT schema.

Changes during conversion:
  - drop deprecated compatible (it's been deprecated for ~10 years)

Signed-off-by: Stanislav Jakubek <stano.jakubek@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230618144635.GA22166@standask-GA-A55M-S2HP
13 months agoclocksource/drivers/imx-gpt: Fold <soc/imx/timer.h> into its only user
Uwe Kleine-König [Tue, 28 Mar 2023 10:05:31 +0000 (12:05 +0200)]
clocksource/drivers/imx-gpt: Fold <soc/imx/timer.h> into its only user

Only the imx-gpt timer driver makes use of enum imx_gpt_type that is
otherwise unused. Move its definition into the timer-imx-gpt driver.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230328100531.879485-3-u.kleine-koenig@pengutronix.de
13 months agoclk: imx: Drop inclusion of unused header <soc/imx/timer.h>
Uwe Kleine-König [Tue, 28 Mar 2023 10:05:30 +0000 (12:05 +0200)]
clk: imx: Drop inclusion of unused header <soc/imx/timer.h>

The clk drivers use none of the symbols defined in <soc/imx/timer.h>.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230328100531.879485-2-u.kleine-koenig@pengutronix.de
13 months agoMerge tag 'drm-misc-fixes-2023-06-21' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Fri, 23 Jun 2023 02:16:47 +0000 (12:16 +1000)]
Merge tag 'drm-misc-fixes-2023-06-21' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

drm-misc-fixes for v6.4:
- Qaic imported dma-buf fix.
- Fix null pointer deref when printing a dp-mst message.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <dev@lankhorst.se>
Link: https://patchwork.freedesktop.org/patch/msgid/e96b1965-ba67-7cc5-2358-826eb5b9b998@lankhorst.se
13 months agoMerge tag 'net-6.4-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Fri, 23 Jun 2023 00:59:51 +0000 (17:59 -0700)]
Merge tag 'net-6.4-rc8' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Paolo Abeni:
 "Including fixes from ipsec, bpf, mptcp and netfilter.

  Current release - regressions:

   - netfilter: add NFT_TRANS_PREPARE_ERROR to deal with bound set/chain

   - eth: mlx5e:
      - fix scheduling of IPsec ASO query while in atomic
      - free IRQ rmap and notifier on kernel shutdown

  Current release - new code bugs:

   - phy: manual remove LEDs to ensure correct ordering

  Previous releases - regressions:

   - mptcp: fix possible divide by zero in recvmsg()

   - dsa: revert "net: phy: dp83867: perform soft reset and retain
     established link"

  Previous releases - always broken:

   - sched: netem: acquire qdisc lock in netem_change()

   - bpf:
      - fix verifier id tracking of scalars on spill
      - fix NULL dereference on exceptions
      - accept function names that contain dots

   - netfilter: disallow element updates of bound anonymous sets

   - mptcp: ensure listener is unhashed before updating the sk status

   - xfrm:
      - add missed call to delete offloaded policies
      - fix inbound ipv4/udp/esp packets to UDPv6 dualstack sockets

   - selftests: fixes for FIPS mode

   - dsa: mt7530: fix multiple CPU ports, BPDU and LLDP handling

   - eth: sfc: use budget for TX completions

  Misc:

   - wifi: iwlwifi: add support for SO-F device with PCI id 0x7AF0"

* tag 'net-6.4-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (74 commits)
  revert "net: align SO_RCVMARK required privileges with SO_MARK"
  net: wwan: iosm: Convert single instance struct member to flexible array
  sch_netem: acquire qdisc lock in netem_change()
  selftests: forwarding: Fix race condition in mirror installation
  wifi: mac80211: report all unusable beacon frames
  mptcp: ensure listener is unhashed before updating the sk status
  mptcp: drop legacy code around RX EOF
  mptcp: consolidate fallback and non fallback state machine
  mptcp: fix possible list corruption on passive MPJ
  mptcp: fix possible divide by zero in recvmsg()
  mptcp: handle correctly disconnect() failures
  bpf: Force kprobe multi expected_attach_type for kprobe_multi link
  bpf/btf: Accept function names that contain dots
  Revert "net: phy: dp83867: perform soft reset and retain established link"
  net: mdio: fix the wrong parameters
  netfilter: nf_tables: Fix for deleting base chains with payload
  netfilter: nfnetlink_osf: fix module autoload
  netfilter: nf_tables: drop module reference after updating chain
  netfilter: nf_tables: disallow timeout for anonymous sets
  netfilter: nf_tables: disallow updates of anonymous sets
  ...

13 months agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Fri, 23 Jun 2023 00:54:10 +0000 (17:54 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "ARM:

   - Correctly save/restore PMUSERNR_EL0 when host userspace is using
     PMU counters directly

   - Fix GICv2 emulation on GICv3 after the locking rework

   - Don't use smp_processor_id() in kvm_pmu_probe_armpmu(), and
     document why

  Generic:

   - Avoid setting page table entries pointing to a deleted memslot if a
     host page table entry is changed concurrently with the deletion"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: Avoid illegal stage2 mapping on invalid memory slot
  KVM: arm64: Use raw_smp_processor_id() in kvm_pmu_probe_armpmu()
  KVM: arm64: Restore GICv2-on-GICv3 functionality
  KVM: arm64: PMU: Don't overwrite PMUSERENR with vcpu loaded
  KVM: arm64: PMU: Restore the host's PMUSERENR_EL0

13 months agoMerge tag 'powerpc-6.4-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Fri, 23 Jun 2023 00:49:40 +0000 (17:49 -0700)]
Merge tag 'powerpc-6.4-5' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:

 - Disable IRQs when switching mm in exit_lazy_flush_tlb() called from
   exit_mmap()

Thanks to Nicholas Piggin and Sachin Sant.

* tag 'powerpc-6.4-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64s/radix: Fix exit lazy tlb mm switch with irqs enabled

13 months agoMerge tag 'pci-v6.4-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Linus Torvalds [Fri, 23 Jun 2023 00:47:07 +0000 (17:47 -0700)]
Merge tag 'pci-v6.4-fixes-2' of git://git./linux/kernel/git/pci/pci

Pull pci fix from Bjorn Helgaas:

 - Transfer Intel LGM GW PCIe maintenance from Rahul Tanwar to Chuanhua
   Lei (Zhu YiXin)

* tag 'pci-v6.4-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
  MAINTAINERS: Add Chuanhua Lei as Intel LGM GW PCIe maintainer

13 months agoMerge tag 'mmc-v6.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Linus Torvalds [Fri, 23 Jun 2023 00:42:07 +0000 (17:42 -0700)]
Merge tag 'mmc-v6.4-rc6' of git://git./linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:

 - Fix support for deferred probing for several host drivers

 - litex_mmc: Use async probe as it's common for all mmc hosts

 - meson-gx: Fix bug when scheduling while atomic

 - mmci_stm32: Fix max busy timeout calculation

 - sdhci-msm: Disable broken 64-bit DMA on MSM8916

* tag 'mmc-v6.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: usdhi60rol0: fix deferred probing
  mmc: sunxi: fix deferred probing
  mmc: sh_mmcif: fix deferred probing
  mmc: sdhci-spear: fix deferred probing
  mmc: sdhci-acpi: fix deferred probing
  mmc: owl: fix deferred probing
  mmc: omap_hsmmc: fix deferred probing
  mmc: omap: fix deferred probing
  mmc: mvsdio: fix deferred probing
  mmc: mtk-sd: fix deferred probing
  mmc: meson-gx: fix deferred probing
  mmc: bcm2835: fix deferred probing
  mmc: litex_mmc: set PROBE_PREFER_ASYNCHRONOUS
  mmc: meson-gx: remove redundant mmc_request_done() call from irq context
  mmc: mmci: stm32: fix max busy timeout calculation
  mmc: sdhci-msm: Disable broken 64-bit DMA on MSM8916

13 months agoMerge tag 'platform-drivers-x86-v6.4-5' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 23 Jun 2023 00:38:11 +0000 (17:38 -0700)]
Merge tag 'platform-drivers-x86-v6.4-5' of git://git./linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver fix from Hans de Goede:
 "One small fix for an AMD PMF driver issue which is causing issues for
  users of just released AMD laptop models"

* tag 'platform-drivers-x86-v6.4-5' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86:
  platform/x86/amd/pmf: Register notify handler only if SPS is enabled

13 months agoMerge tag 'io_uring-6.4-2023-06-21' of git://git.kernel.dk/linux
Linus Torvalds [Fri, 23 Jun 2023 00:32:34 +0000 (17:32 -0700)]
Merge tag 'io_uring-6.4-2023-06-21' of git://git.kernel.dk/linux

Pull io_uring fixes from Jens Axboe:
 "A fix for a race condition with poll removal and linked timeouts, and
  then a few followup fixes/tweaks for the msg_control patch from last
  week.

  Not super important, particularly the sparse fixup, as it was broken
  before that recent commit. But let's get it sorted for real for this
  release, rather than just have it broken a bit differently"

* tag 'io_uring-6.4-2023-06-21' of git://git.kernel.dk/linux:
  io_uring/net: use the correct msghdr union member in io_sendmsg_copy_hdr
  io_uring/net: disable partial retries for recvmsg with cmsg
  io_uring/net: clear msg_controllen on partial sendmsg retry
  io_uring/poll: serialize poll linked timer start with poll removal

13 months agoMerge tag 'cgroup-for-6.4-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 23 Jun 2023 00:27:16 +0000 (17:27 -0700)]
Merge tag 'cgroup-for-6.4-rc7-fixes' of git://git./linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:
 "It's late but here are two bug fixes. Both fix problems which can be
  severe but are very confined in scope. The risk to most use cases
  should be minimal.

   - Fix for an old bug which triggers if a cgroup subsystem is
     remounted to a different hierarchy while someone is reading its
     cgroup.procs/tasks file. The risk is pretty low given how seldom
     cgroup subsystems are moved across hierarchies.

   - We moved cpus_read_lock() outside of cgroup internal locks a while
     ago but forgot to update the legacy_freezer leading to lockdep
     triggers. Fixed"

* tag 'cgroup-for-6.4-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: Do not corrupt task iteration when rebinding subsystem
  cgroup,freezer: hold cpu_hotplug_lock before freezer_mutex in freezer_css_{online,offline}()

13 months agoMerge tag 'kvmarm-fixes-6.4-4' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmar...
Paolo Bonzini [Thu, 22 Jun 2023 19:28:26 +0000 (15:28 -0400)]
Merge tag 'kvmarm-fixes-6.4-4' of git://git./linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 6.4, take #4

- Correctly save/restore PMUSERNR_EL0 when host userspace is using
  PMU counters directly

- Fix GICv2 emulation on GICv3 after the locking rework

- Don't use smp_processor_id() in kvm_pmu_probe_armpmu(), and
  document why...

13 months agoarm64: dts: qcom: sc7280: Mark SCM as dma-coherent for chrome devices
Douglas Anderson [Fri, 16 Jun 2023 15:14:41 +0000 (08:14 -0700)]
arm64: dts: qcom: sc7280: Mark SCM as dma-coherent for chrome devices

Just like for sc7180 devices using the Chrome bootflow (AKA trogdor
and IDP), sc7280 devices using the Chrome bootflow also need their
firmware marked dma-coherent. On sc7280 this wasn't causing WiFi to
fail to startup, since WiFi works differently there. However, on
sc7280 devices we were still getting the message at bootup after
commit 7bd6680b47fa ("Revert "Revert "arm64: dma: Drop cache
invalidation from arch_dma_prep_coherent()"""):

 qcom_scm firmware:scm: Assign memory protection call failed -22
 qcom_rmtfs_mem 9c900000.memory: assign memory failed
 qcom_rmtfs_mem: probe of 9c900000.memory failed with error -22

We should mark SCM properly just like we did for trogdor.

Fixes: 7bd6680b47fa ("Revert "Revert "arm64: dma: Drop cache invalidation from arch_dma_prep_coherent()""")
Fixes: 7a1f4e7f740d ("arm64: dts: qcom: sc7280: Add basic dts/dtsi files for sc7280 soc")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230616081440.v2.4.I21dc14a63327bf81c6bb58fe8ed91dbdc9849ee2@changeid
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
13 months agoarm64: dts: qcom: sc7180: Mark SCM as dma-coherent for trogdor
Douglas Anderson [Fri, 16 Jun 2023 15:14:40 +0000 (08:14 -0700)]
arm64: dts: qcom: sc7180: Mark SCM as dma-coherent for trogdor

Trogdor devices use firmware backed by TF-A instead of Qualcomm's
normal TZ. On TF-A we end up mapping memory as cacheable.
Specifically, you can see in Trogdor's TF-A code [1] in
qti_sip_mem_assign() that we call qti_mmap_add_dynamic_region() with
MT_RO_DATA. This translates down to MT_MEMORY instead of
MT_NON_CACHEABLE or MT_DEVICE. Apparently Qualcomm's normal TZ
implementation maps the memory as non-cacheable.

Let's add the "dma-coherent" attribute to the SCM for trogdor.

Adding "dma-coherent" like this fixes WiFi on sc7180-trogdor
devices. WiFi was broken as of commit 7bd6680b47fa ("Revert "Revert
"arm64: dma: Drop cache invalidation from
arch_dma_prep_coherent()"""). Specifically at bootup we'd get:

 qcom_scm firmware:scm: Assign memory protection call failed -22
 qcom_rmtfs_mem 94600000.memory: assign memory failed
 qcom_rmtfs_mem: probe of 94600000.memory failed with error -22

From discussion on the mailing lists [2] and over IRC [3], it was
determined that we should always have been tagging the SCM as
dma-coherent on trogdor but that the old "invalidate" happened to make
things work most of the time. Tagging it properly like this is a much
more robust solution.

[1] https://chromium.googlesource.com/chromiumos/third_party/arm-trusted-firmware/+/refs/heads/firmware-trogdor-13577.B/plat/qti/common/src/qti_syscall.c
[2] https://lore.kernel.org/r/20230614165904.1.I279773c37e2c1ed8fbb622ca6d1397aea0023526@changeid
[3] https://oftc.irclog.whitequark.org/linux-msm/2023-06-15

Fixes: 7bd6680b47fa ("Revert "Revert "arm64: dma: Drop cache invalidation from arch_dma_prep_coherent()""")
Fixes: 7ec3e67307f8 ("arm64: dts: qcom: sc7180-trogdor: add initial trogdor and lazor dt")
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230616081440.v2.3.Ic62daa649b47b656b313551d646c4de9a7da4bd4@changeid
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
13 months agoarm64: dts: qcom: sc7180: Mark SCM as dma-coherent for IDP
Douglas Anderson [Fri, 16 Jun 2023 15:14:39 +0000 (08:14 -0700)]
arm64: dts: qcom: sc7180: Mark SCM as dma-coherent for IDP

sc7180-idp is, for most intents and purposes, a trogdor device.
Specifically, sc7180-idp is designed to run the same style of firmware
as trogdor devices. This can be seen from the fact that IDP has the
same "Reserved memory changes" in its device tree that trogdor has.

Recently it was realized that we need to mark SCM as dma-coherent to
match what trogdor's style of firmware (based on TF-A) does [1]. That
means we need this dma-coherent tag on IDP as well.

Without this, on newer versions of Linux, specifically those with
commit 7bd6680b47fa ("Revert "Revert "arm64: dma: Drop cache
invalidation from arch_dma_prep_coherent()"""), WiFi will fail to
work. At bootup you'll see:

  qcom_scm firmware:scm: Assign memory protection call failed -22
  qcom_rmtfs_mem 94600000.memory: assign memory failed
  qcom_rmtfs_mem: probe of 94600000.memory failed with error -22

[1] https://lore.kernel.org/r/20230615145253.1.Ic62daa649b47b656b313551d646c4de9a7da4bd4@changeid

Fixes: 7bd6680b47fa ("Revert "Revert "arm64: dma: Drop cache invalidation from arch_dma_prep_coherent()""")
Fixes: f5ab220d162c ("arm64: dts: qcom: sc7180: Add remoteproc enablers")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230616081440.v2.2.I3c17d546d553378aa8a0c68c3fe04bccea7cba17@changeid
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
13 months agodt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent
Douglas Anderson [Fri, 16 Jun 2023 15:14:38 +0000 (08:14 -0700)]
dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent

Trogdor devices use firmware backed by TF-A instead of Qualcomm's
normal TZ. On TF-A we end up mapping memory as cacheable. Specifically,
you can see in Trogdor's TF-A code [1] in qti_sip_mem_assign() that we
call qti_mmap_add_dynamic_region() with MT_RO_DATA. This translates
down to MT_MEMORY instead of MT_NON_CACHEABLE or MT_DEVICE.

Let's allow devices like trogdor to be described properly by allowing
"dma-coherent" in the SCM node.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230616081440.v2.1.Ie79b5f0ed45739695c9970df121e11d724909157@changeid
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
13 months agoKVM: Avoid illegal stage2 mapping on invalid memory slot
Gavin Shan [Thu, 15 Jun 2023 05:42:59 +0000 (15:42 +1000)]
KVM: Avoid illegal stage2 mapping on invalid memory slot

We run into guest hang in edk2 firmware when KSM is kept as running on
the host. The edk2 firmware is waiting for status 0x80 from QEMU's pflash
device (TYPE_PFLASH_CFI01) during the operation of sector erasing or
buffered write. The status is returned by reading the memory region of
the pflash device and the read request should have been forwarded to QEMU
and emulated by it. Unfortunately, the read request is covered by an
illegal stage2 mapping when the guest hang issue occurs. The read request
is completed with QEMU bypassed and wrong status is fetched. The edk2
firmware runs into an infinite loop with the wrong status.

The illegal stage2 mapping is populated due to same page sharing by KSM
at (C) even the associated memory slot has been marked as invalid at (B)
when the memory slot is requested to be deleted. It's notable that the
active and inactive memory slots can't be swapped when we're in the middle
of kvm_mmu_notifier_change_pte() because kvm->mn_active_invalidate_count
is elevated, and kvm_swap_active_memslots() will busy loop until it reaches
to zero again. Besides, the swapping from the active to the inactive memory
slots is also avoided by holding &kvm->srcu in __kvm_handle_hva_range(),
corresponding to synchronize_srcu_expedited() in kvm_swap_active_memslots().

  CPU-A                    CPU-B
  -----                    -----
                           ioctl(kvm_fd, KVM_SET_USER_MEMORY_REGION)
                           kvm_vm_ioctl_set_memory_region
                           kvm_set_memory_region
                           __kvm_set_memory_region
                           kvm_set_memslot(kvm, old, NULL, KVM_MR_DELETE)
                             kvm_invalidate_memslot
                               kvm_copy_memslot
                               kvm_replace_memslot
                               kvm_swap_active_memslots        (A)
                               kvm_arch_flush_shadow_memslot   (B)
  same page sharing by KSM
  kvm_mmu_notifier_invalidate_range_start
        :
  kvm_mmu_notifier_change_pte
    kvm_handle_hva_range
    __kvm_handle_hva_range
    kvm_set_spte_gfn            (C)
        :
  kvm_mmu_notifier_invalidate_range_end

Fix the issue by skipping the invalid memory slot at (C) to avoid the
illegal stage2 mapping so that the read request for the pflash's status
is forwarded to QEMU and emulated by it. In this way, the correct pflash's
status can be returned from QEMU to break the infinite loop in the edk2
firmware.

We tried a git-bisect and the first problematic commit is cd4c71835228 ("
KVM: arm64: Convert to the gfn-based MMU notifier callbacks"). With this,
clean_dcache_guest_page() is called after the memory slots are iterated
in kvm_mmu_notifier_change_pte(). clean_dcache_guest_page() is called
before the iteration on the memory slots before this commit. This change
literally enlarges the racy window between kvm_mmu_notifier_change_pte()
and memory slot removal so that we're able to reproduce the issue in a
practical test case. However, the issue exists since commit d5d8184d35c9
("KVM: ARM: Memory virtualization setup").

Cc: stable@vger.kernel.org # v3.9+
Fixes: d5d8184d35c9 ("KVM: ARM: Memory virtualization setup")
Reported-by: Shuai Hu <hshuai@redhat.com>
Reported-by: Zhenyu Zhang <zhenyzha@redhat.com>
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Shaoqin Huang <shahuang@redhat.com>
Message-Id: <20230615054259.14911-1-gshan@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
13 months agoRevert "cgroup: Avoid -Wstringop-overflow warnings"
Tejun Heo [Thu, 22 Jun 2023 18:51:14 +0000 (08:51 -1000)]
Revert "cgroup: Avoid -Wstringop-overflow warnings"

This reverts commit 36de5f303ca1bd6fce74815ef17ef3d8ff8737b5.

The commit caused boot failures on some configurations due to cgroup
hierarchies not being created at all.

Signed-off-by: Tejun Heo <tj@kernel.org>
13 months agoACPI: video: Add backlight=native DMI quirk for Dell Studio 1569
Hans de Goede [Tue, 20 Jun 2023 18:45:04 +0000 (20:45 +0200)]
ACPI: video: Add backlight=native DMI quirk for Dell Studio 1569

The Dell Studio 1569 predates Windows 8, so it defaults to using
acpi_video# for backlight control, but this is non functional on
this model.

Add a DMI quirk to use the native intel_backlight interface which
does work properly.

Reported-by: raycekarneal <raycekarneal@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
13 months agoblock: don't return -EINVAL for not found names in devt_from_devname
Christoph Hellwig [Thu, 22 Jun 2023 15:06:44 +0000 (17:06 +0200)]
block: don't return -EINVAL for not found names in devt_from_devname

When we didn't find a device and didn't guess it might be a partition,
it might still show up later, so don't disable rootwait for it by
returning -EINVAL.

Fixes: 079caa35f786 ("init: clear root_wait on all invalid root= strings")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230622150644.600327-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agobtrfs: fix remaining u32 overflows when left shifting stripe_nr
Qu Wenruo [Thu, 22 Jun 2023 06:42:40 +0000 (14:42 +0800)]
btrfs: fix remaining u32 overflows when left shifting stripe_nr

There was regression caused by a97699d1d610 ("btrfs: replace
map_lookup->stripe_len by BTRFS_STRIPE_LEN") and supposedly fixed by
a7299a18a179 ("btrfs: fix u32 overflows when left shifting stripe_nr").
To avoid code churn the fix was open coding the type casts but
unfortunately missed one which was still possible to hit [1].

The missing place was assignment of bioc->full_stripe_logical inside
btrfs_map_block().

Fix it by adding a helper that does the safe calculation of the offset
and use it everywhere even though it may not be strictly necessary due
to already using u64 types.  This replaces all remaining
"<< BTRFS_STRIPE_LEN_SHIFT" calls.

[1] https://lore.kernel.org/linux-btrfs/20230622065438.86402-1-wqu@suse.com/

Fixes: a7299a18a179 ("btrfs: fix u32 overflows when left shifting stripe_nr")
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
13 months agocdrom: Fix spectre-v1 gadget
Jordy Zomer [Sat, 17 Jun 2023 11:38:28 +0000 (12:38 +0100)]
cdrom: Fix spectre-v1 gadget

This patch fixes a spectre-v1 gadget in cdrom.
The gadget could be triggered by speculatively
bypassing the cdi->capacity check.

Signed-off-by: Jordy Zomer <jordyzomer@google.com>
Link: https://lore.kernel.org/all/20230612110040.849318-2-jordyzomer@google.com
Reviewed-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/all/ZI1+1OG9Ut1MqsUC@equinox
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20230617113828.1230-2-phil@philpotter.co.uk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoblock: make sure local irq is disabled when calling __blkcg_rstat_flush
Ming Lei [Thu, 22 Jun 2023 08:42:49 +0000 (16:42 +0800)]
block: make sure local irq is disabled when calling __blkcg_rstat_flush

When __blkcg_rstat_flush() is called from cgroup_rstat_flush*() code
path, interrupt is always disabled.

When we start to flush blkcg per-cpu stats list in __blkg_release()
for avoiding to leak blkcg_gq's reference in commit 20cb1c2fb756
("blk-cgroup: Flush stats before releasing blkcg_gq"), local irq
isn't disabled yet, then lockdep warning may be triggered because
the dependent cgroup locks may be acquired from irq(soft irq) handler.

Fix the issue by disabling local irq always.

Fixes: 20cb1c2fb756 ("blk-cgroup: Flush stats before releasing blkcg_gq")
Reported-by: Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Closes: https://lore.kernel.org/linux-block/pz2wzwnmn5tk3pwpskmjhli6g3qly7eoknilb26of376c7kwxy@qydzpvt6zpis/T/#u
Cc: stable@vger.kernel.org
Cc: Jay Shin <jaeshin@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Waiman Long <longman@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Waiman Long <longman@redhat.com>
Link: https://lore.kernel.org/r/20230622084249.1208005-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoerofs: clean up zmap.c
Gao Xiang [Thu, 15 Jun 2023 06:44:21 +0000 (14:44 +0800)]
erofs: clean up zmap.c

Several trivial cleanups which aren't quite necessary to split:

 - Rename lcluster load functions as well as justify full indexes
   since they are typically used for global deduplication for
   compressed data;

 - Avoid unnecessary lines, comments for simplicity.

No logic changes.

Reviewed-by: Guo Xuenan <guoxuenan@huaweicloud.com>
Reviewed-by: Yue Hu <huyue2@coolpad.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230615064421.103178-1-hsiangkao@linux.alibaba.com
13 months agoerofs: remove unnecessary goto
Yangtao Li [Thu, 15 Jun 2023 03:45:38 +0000 (11:45 +0800)]
erofs: remove unnecessary goto

It's redundant, let's remove it.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230615034539.14286-1-frank.li@vivo.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
13 months agoerofs: Fix detection of atomic context
Sandeep Dhavale [Wed, 21 Jun 2023 22:08:47 +0000 (15:08 -0700)]
erofs: Fix detection of atomic context

Current check for atomic context is not sufficient as
z_erofs_decompressqueue_endio can be called under rcu lock
from blk_mq_flush_plug_list(). See the stacktrace [1]

In such case we should hand off the decompression work for async
processing rather than trying to do sync decompression in current
context. Patch fixes the detection by checking for
rcu_read_lock_any_held() and while at it use more appropriate
!in_task() check than in_atomic().

Background: Historically erofs would always schedule a kworker for
decompression which would incur the scheduling cost regardless of
the context. But z_erofs_decompressqueue_endio() may not always
be in atomic context and we could actually benefit from doing the
decompression in z_erofs_decompressqueue_endio() if we are in
thread context, for example when running with dm-verity.
This optimization was later added in patch [2] which has shown
improvement in performance benchmarks.

==============================================
[1] Problem stacktrace
[name:core&]BUG: sleeping function called from invalid context at kernel/locking/mutex.c:291
[name:core&]in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 1615, name: CpuMonitorServi
[name:core&]preempt_count: 0, expected: 0
[name:core&]RCU nest depth: 1, expected: 0
CPU: 7 PID: 1615 Comm: CpuMonitorServi Tainted: G S      W  OE      6.1.25-android14-5-maybe-dirty-mainline #1
Hardware name: MT6897 (DT)
Call trace:
 dump_backtrace+0x108/0x15c
 show_stack+0x20/0x30
 dump_stack_lvl+0x6c/0x8c
 dump_stack+0x20/0x48
 __might_resched+0x1fc/0x308
 __might_sleep+0x50/0x88
 mutex_lock+0x2c/0x110
 z_erofs_decompress_queue+0x11c/0xc10
 z_erofs_decompress_kickoff+0x110/0x1a4
 z_erofs_decompressqueue_endio+0x154/0x180
 bio_endio+0x1b0/0x1d8
 __dm_io_complete+0x22c/0x280
 clone_endio+0xe4/0x280
 bio_endio+0x1b0/0x1d8
 blk_update_request+0x138/0x3a4
 blk_mq_plug_issue_direct+0xd4/0x19c
 blk_mq_flush_plug_list+0x2b0/0x354
 __blk_flush_plug+0x110/0x160
 blk_finish_plug+0x30/0x4c
 read_pages+0x2fc/0x370
 page_cache_ra_unbounded+0xa4/0x23c
 page_cache_ra_order+0x290/0x320
 do_sync_mmap_readahead+0x108/0x2c0
 filemap_fault+0x19c/0x52c
 __do_fault+0xc4/0x114
 handle_mm_fault+0x5b4/0x1168
 do_page_fault+0x338/0x4b4
 do_translation_fault+0x40/0x60
 do_mem_abort+0x60/0xc8
 el0_da+0x4c/0xe0
 el0t_64_sync_handler+0xd4/0xfc
 el0t_64_sync+0x1a0/0x1a4

Link: https://lore.kernel.org/all/20210317035448.13921-1-huangjianan@oppo.com/
Reported-by: Will Shiu <Will.Shiu@mediatek.com>
Suggested-by: Gao Xiang <xiang@kernel.org>
Signed-off-by: Sandeep Dhavale <dhavale@google.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
Link: https://lore.kernel.org/r/20230621220848.3379029-1-dhavale@google.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
13 months agos390/defconfigs: set CONFIG_NET_TC_SKB_EXT=y
Niklas Schnelle [Fri, 2 Jun 2023 14:09:27 +0000 (16:09 +0200)]
s390/defconfigs: set CONFIG_NET_TC_SKB_EXT=y

As made explicit by commit 03a283cdc8c8 ("net/mlx5: Kconfig: Make tc
offload depend on tc skb extension") tc skb extension is required for
offloading tc as well as bridges on switchdev capable ConnectX devices.

Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
13 months agoMerge tag 'nf-23-06-21' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
Paolo Abeni [Thu, 22 Jun 2023 12:39:06 +0000 (14:39 +0200)]
Merge tag 'nf-23-06-21' of git://git./linux/kernel/git/netfilter/nf

Pablo Neira Ayuso says:

====================
Netfilter/IPVS fixes for net

This is v3, including a crash fix for patch 01/14.

The following patchset contains Netfilter/IPVS fixes for net:

1) Fix UDP segmentation with IPVS tunneled traffic, from Terin Stock.

2) Fix chain binding transaction logic, add a bound flag to rule
   transactions. Remove incorrect logic in nft_data_hold() and
   nft_data_release().

3) Add a NFT_TRANS_PREPARE_ERROR deactivate state to deal with releasing
   the set/chain as a follow up to 1240eb93f061 ("netfilter: nf_tables:
   incorrect error path handling with NFT_MSG_NEWRULE")

4) Drop map element references from preparation phase instead of
   set destroy path, otherwise bogus EBUSY with transactions such as:

        flush chain ip x y
        delete chain ip x w

   where chain ip x y contains jump/goto from set elements.

5) Pipapo set type does not regard generation mask from the walk
   iteration.

6) Fix reference count underflow in set element reference to
   stateful object.

7) Several patches to tighten the nf_tables API:
   - disallow set element updates of bound anonymous set
   - disallow unbound anonymous set/chain at the end of transaction.
   - disallow updates of anonymous set.
   - disallow timeout configuration for anonymous sets.

8) Fix module reference leak in chain updates.

9) Fix nfnetlink_osf module autoload.

10) Fix deletion of basechain when NFTA_CHAIN_HOOK is specified as
    in iptables-nft.

This Netfilter batch is larger than usual at this stage, I am aware we
are fairly late in the -rc cycle, if you prefer to route them through
net-next, please let me know.

netfilter pull request 23-06-21

* tag 'nf-23-06-21' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
  netfilter: nf_tables: Fix for deleting base chains with payload
  netfilter: nfnetlink_osf: fix module autoload
  netfilter: nf_tables: drop module reference after updating chain
  netfilter: nf_tables: disallow timeout for anonymous sets
  netfilter: nf_tables: disallow updates of anonymous sets
  netfilter: nf_tables: reject unbound chain set before commit phase
  netfilter: nf_tables: reject unbound anonymous set before commit phase
  netfilter: nf_tables: disallow element updates of bound anonymous sets
  netfilter: nf_tables: fix underflow in object reference counter
  netfilter: nft_set_pipapo: .walk does not deal with generations
  netfilter: nf_tables: drop map element references from preparation phase
  netfilter: nf_tables: add NFT_TRANS_PREPARE_ERROR to deal with bound set/chain
  netfilter: nf_tables: fix chain binding transaction logic
  ipvs: align inner_mac_header for encapsulation
====================

Link: https://lore.kernel.org/r/20230621100731.68068-1-pablo@netfilter.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agos390/cpum_cf: rework PER_CPU_DEFINE of struct cpu_cf_events
Thomas Richter [Thu, 15 Jun 2023 11:31:58 +0000 (13:31 +0200)]
s390/cpum_cf: rework PER_CPU_DEFINE of struct cpu_cf_events

Struct cpu_cf_events is a large data structure and is statically defined
for each possible CPU. Rework this and replace it by dynamically
allocated data structures created when a perf_event_open() system call
is invoked or an access via character device /dev/hwctr takes place.

It is replaced by an array of pointers to all possible CPUs and
reference counting. The array of pointers is allocated when the first
event is created. For each online CPU an event is installed on, a struct
cpu_cf_events is allocated and a pointer to struct cpu_cf_events is
stored in the array:

                   CPU   0   1   2   3  ...  N
                       +---+---+---+---+---+---+
 cpu_cf_root::cpucf--> | * |   |   |   |...|   |
                       +-|-+---+---+---+---+---+
                         |
                         |
                        \|/
                     +-------------+
     |cpu_cf_events|
     |             |
                     +-------------+

With this approach the large data structure is only allocated when
an event is actually installed and used.
Also implement proper reference counting for allocation and removal.

During interrupt processing make sure the pointer to cpu_cf_events
is valid. The interrupt handler is shared and might be called when
no event is active.
This requires checking for a valid pointer to struct cpu_cf_events.
When the pointer to the per-cpu cpu_cf_events is NULL, simply return.

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
13 months agorevert "net: align SO_RCVMARK required privileges with SO_MARK"
Maciej Żenczykowski [Sun, 18 Jun 2023 10:31:30 +0000 (03:31 -0700)]
revert "net: align SO_RCVMARK required privileges with SO_MARK"

This reverts commit 1f86123b9749 ("net: align SO_RCVMARK required
privileges with SO_MARK") because the reasoning in the commit message
is not really correct:
  SO_RCVMARK is used for 'reading' incoming skb mark (via cmsg), as such
  it is more equivalent to 'getsockopt(SO_MARK)' which has no priv check
  and retrieves the socket mark, rather than 'setsockopt(SO_MARK) which
  sets the socket mark and does require privs.

  Additionally incoming skb->mark may already be visible if
  sysctl_fwmark_reflect and/or sysctl_tcp_fwmark_accept are enabled.

  Furthermore, it is easier to block the getsockopt via bpf
  (either cgroup setsockopt hook, or via syscall filters)
  then to unblock it if it requires CAP_NET_RAW/ADMIN.

On Android the socket mark is (among other things) used to store
the network identifier a socket is bound to.  Setting it is privileged,
but retrieving it is not.  We'd like unprivileged userspace to be able
to read the network id of incoming packets (where mark is set via
iptables [to be moved to bpf])...

An alternative would be to add another sysctl to control whether
setting SO_RCVMARK is privilged or not.
(or even a MASK of which bits in the mark can be exposed)
But this seems like over-engineering...

Note: This is a non-trivial revert, due to later merged commit e42c7beee71d
("bpf: net: Consider has_current_bpf_ctx() when testing capable() in sk_setsockopt()")
which changed both 'ns_capable' into 'sockopt_ns_capable' calls.

Fixes: 1f86123b9749 ("net: align SO_RCVMARK required privileges with SO_MARK")
Cc: Larysa Zaremba <larysa.zaremba@intel.com>
Cc: Simon Horman <simon.horman@corigine.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Eyal Birger <eyal.birger@gmail.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Patrick Rohr <prohr@google.com>
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20230618103130.51628-1-maze@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agonet: wwan: iosm: Convert single instance struct member to flexible array
Kees Cook [Tue, 20 Jun 2023 19:42:38 +0000 (12:42 -0700)]
net: wwan: iosm: Convert single instance struct member to flexible array

struct mux_adth actually ends with multiple struct mux_adth_dg members.
This is seen both in the comments about the member:

/**
 * struct mux_adth - Structure of the Aggregated Datagram Table Header.
 ...
 * @dg: datagramm table with variable length
 */

and in the preparation for populating it:

                        adth_dg_size = offsetof(struct mux_adth, dg) +
                                        ul_adb->dg_count[i] * sizeof(*dg);
...
                        adth_dg_size -= offsetof(struct mux_adth, dg);
                        memcpy(&adth->dg, ul_adb->dg[i], adth_dg_size);

This was reported as a run-time false positive warning:

memcpy: detected field-spanning write (size 16) of single field "&adth->dg" at drivers/net/wwan/iosm/iosm_ipc_mux_codec.c:852 (size 8)

Adjust the struct mux_adth definition and associated sizeof() math; no binary
output differences are observed in the resulting object file.

Reported-by: Florian Klink <flokli@flokli.de>
Closes: https://lore.kernel.org/lkml/dbfa25f5-64c8-5574-4f5d-0151ba95d232@gmail.com/
Fixes: 1f52d7b62285 ("net: wwan: iosm: Enable M.2 7360 WWAN card support")
Cc: M Chetan Kumar <m.chetan.kumar@intel.com>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Intel Corporation <linuxwwan@intel.com>
Cc: Loic Poulain <loic.poulain@linaro.org>
Cc: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230620194234.never.023-kees@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agosch_netem: acquire qdisc lock in netem_change()
Eric Dumazet [Tue, 20 Jun 2023 18:44:25 +0000 (18:44 +0000)]
sch_netem: acquire qdisc lock in netem_change()

syzbot managed to trigger a divide error [1] in netem.

It could happen if q->rate changes while netem_enqueue()
is running, since q->rate is read twice.

It turns out netem_change() always lacked proper synchronization.

[1]
divide error: 0000 [#1] SMP KASAN
CPU: 1 PID: 7867 Comm: syz-executor.1 Not tainted 6.1.30-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:div64_u64 include/linux/math64.h:69 [inline]
RIP: 0010:packet_time_ns net/sched/sch_netem.c:357 [inline]
RIP: 0010:netem_enqueue+0x2067/0x36d0 net/sched/sch_netem.c:576
Code: 89 e2 48 69 da 00 ca 9a 3b 42 80 3c 28 00 4c 8b a4 24 88 00 00 00 74 0d 4c 89 e7 e8 c3 4f 3b fd 48 8b 4c 24 18 48 89 d8 31 d2 <49> f7 34 24 49 01 c7 4c 8b 64 24 48 4d 01 f7 4c 89 e3 48 c1 eb 03
RSP: 0018:ffffc9000dccea60 EFLAGS: 00010246
RAX: 000001a442624200 RBX: 000001a442624200 RCX: ffff888108a4f000
RDX: 0000000000000000 RSI: 000000000000070d RDI: 000000000000070d
RBP: ffffc9000dcceb90 R08: ffffffff849c5e26 R09: fffffbfff10e1297
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888108a4f358
R13: dffffc0000000000 R14: 0000001a8cd9a7ec R15: 0000000000000000
FS: 00007fa73fe18700(0000) GS:ffff8881f6b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa73fdf7718 CR3: 000000011d36e000 CR4: 0000000000350ee0
Call Trace:
<TASK>
[<ffffffff84714385>] __dev_xmit_skb net/core/dev.c:3931 [inline]
[<ffffffff84714385>] __dev_queue_xmit+0xcf5/0x3370 net/core/dev.c:4290
[<ffffffff84d22df2>] dev_queue_xmit include/linux/netdevice.h:3030 [inline]
[<ffffffff84d22df2>] neigh_hh_output include/net/neighbour.h:531 [inline]
[<ffffffff84d22df2>] neigh_output include/net/neighbour.h:545 [inline]
[<ffffffff84d22df2>] ip_finish_output2+0xb92/0x10d0 net/ipv4/ip_output.c:235
[<ffffffff84d21e63>] __ip_finish_output+0xc3/0x2b0
[<ffffffff84d10a81>] ip_finish_output+0x31/0x2a0 net/ipv4/ip_output.c:323
[<ffffffff84d10f14>] NF_HOOK_COND include/linux/netfilter.h:298 [inline]
[<ffffffff84d10f14>] ip_output+0x224/0x2a0 net/ipv4/ip_output.c:437
[<ffffffff84d123b5>] dst_output include/net/dst.h:444 [inline]
[<ffffffff84d123b5>] ip_local_out net/ipv4/ip_output.c:127 [inline]
[<ffffffff84d123b5>] __ip_queue_xmit+0x1425/0x2000 net/ipv4/ip_output.c:542
[<ffffffff84d12fdc>] ip_queue_xmit+0x4c/0x70 net/ipv4/ip_output.c:556

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230620184425.1179809-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agohrtimer: Add missing sparse annotations to hrtimer locking
Ben Dooks [Wed, 21 Jun 2023 07:59:28 +0000 (08:59 +0100)]
hrtimer: Add missing sparse annotations to hrtimer locking

Sparse warns about lock imbalance vs. the hrtimer_base lock due to missing
sparse annotations:

kernel/time/hrtimer.c:175:33: warning: context imbalance in 'lock_hrtimer_base' - wrong count at exit
kernel/time/hrtimer.c:1301:28: warning: context imbalance in 'hrtimer_start_range_ns' - unexpected unlock
kernel/time/hrtimer.c:1336:28: warning: context imbalance in 'hrtimer_try_to_cancel' - unexpected unlock
kernel/time/hrtimer.c:1457:9: warning: context imbalance in '__hrtimer_get_remaining' - unexpected unlock

Add the annotations to the relevant functions.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230621075928.394481-1-ben.dooks@codethink.co.uk
13 months agoplatform/x86/amd/pmf: Register notify handler only if SPS is enabled
Shyam Sundar S K [Thu, 22 Jun 2023 06:03:09 +0000 (11:33 +0530)]
platform/x86/amd/pmf: Register notify handler only if SPS is enabled

Power source notify handler is getting registered even when none of the
PMF feature in enabled leading to a crash.

...
[   22.592162] Call Trace:
[   22.592164]  <TASK>
[   22.592164]  ? rcu_note_context_switch+0x5e0/0x660
[   22.592166]  ? __warn+0x81/0x130
[   22.592171]  ? rcu_note_context_switch+0x5e0/0x660
[   22.592172]  ? report_bug+0x171/0x1a0
[   22.592175]  ? prb_read_valid+0x1b/0x30
[   22.592177]  ? handle_bug+0x3c/0x80
[   22.592178]  ? exc_invalid_op+0x17/0x70
[   22.592179]  ? asm_exc_invalid_op+0x1a/0x20
[   22.592182]  ? rcu_note_context_switch+0x5e0/0x660
[   22.592183]  ? acpi_ut_delete_object_desc+0x86/0xb0
[   22.592186]  ? acpi_ut_update_ref_count.part.0+0x22d/0x930
[   22.592187]  __schedule+0xc0/0x1410
[   22.592189]  ? ktime_get+0x3c/0xa0
[   22.592191]  ? lapic_next_event+0x1d/0x30
[   22.592193]  ? hrtimer_start_range_ns+0x25b/0x350
[   22.592196]  schedule+0x5e/0xd0
[   22.592197]  schedule_hrtimeout_range_clock+0xbe/0x140
[   22.592199]  ? __pfx_hrtimer_wakeup+0x10/0x10
[   22.592200]  usleep_range_state+0x64/0x90
[   22.592203]  amd_pmf_send_cmd+0x106/0x2a0 [amd_pmf bddfe0fe3712aaa99acce3d5487405c5213c6616]
[   22.592207]  amd_pmf_update_slider+0x56/0x1b0 [amd_pmf bddfe0fe3712aaa99acce3d5487405c5213c6616]
[   22.592210]  amd_pmf_set_sps_power_limits+0x72/0x80 [amd_pmf bddfe0fe3712aaa99acce3d5487405c5213c6616]
[   22.592213]  amd_pmf_pwr_src_notify_call+0x49/0x90 [amd_pmf bddfe0fe3712aaa99acce3d5487405c5213c6616]
[   22.592216]  notifier_call_chain+0x5a/0xd0
[   22.592218]  atomic_notifier_call_chain+0x32/0x50
...

Fix this by moving the registration of source change notify handler only
when SPS(Static Slider) is advertised as supported.

Reported-by: Allen Zhong <allen@atr.me>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217571
Fixes: 4c71ae414474 ("platform/x86/amd/pmf: Add support SPS PMF feature")
Tested-by: Patil Rajesh Reddy <Patil.Reddy@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20230622060309.310001-1-Shyam-sundar.S-k@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
13 months agoselftests: forwarding: Fix race condition in mirror installation
Danielle Ratson [Tue, 20 Jun 2023 12:45:15 +0000 (14:45 +0200)]
selftests: forwarding: Fix race condition in mirror installation

When mirroring to a gretap in hardware the device expects to be
programmed with the egress port and all the encapsulating headers. This
requires the driver to resolve the path the packet will take in the
software data path and program the device accordingly.

If the path cannot be resolved (in this case because of an unresolved
neighbor), then mirror installation fails until the path is resolved.
This results in a race that causes the test to sometimes fail.

Fix this by setting the neighbor's state to permanent in a couple of
tests, so that it is always valid.

Fixes: 35c31d5c323f ("selftests: forwarding: Test mirror-to-gretap w/ UL 802.1d")
Fixes: 239e754af854 ("selftests: forwarding: Test mirror-to-gretap w/ UL 802.1q")
Signed-off-by: Danielle Ratson <danieller@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/268816ac729cb6028c7a34d4dda6f4ec7af55333.1687264607.git.petrm@nvidia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agowifi: mac80211: report all unusable beacon frames
Benjamin Berg [Wed, 21 Jun 2023 12:05:44 +0000 (14:05 +0200)]
wifi: mac80211: report all unusable beacon frames

Properly check for RX_DROP_UNUSABLE now that the new drop reason
infrastructure is used. Without this change, the comparison will always
be false as a more specific reason is given in the lower bits of result.

Fixes: baa951a1c177 ("mac80211: use the new drop reasons infrastructure")
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://lore.kernel.org/r/20230621120543.412920-2-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agoMerge branch 'mptcp-fixes-for-6-4'
Jakub Kicinski [Thu, 22 Jun 2023 05:44:59 +0000 (22:44 -0700)]
Merge branch 'mptcp-fixes-for-6-4'

Matthieu Baerts says:

====================
mptcp: fixes for 6.4

Patch 1 correctly handles disconnect() failures that can happen in some
specific cases: now the socket state is set as unconnected as expected.
That fixes an issue introduced in v6.2.

Patch 2 fixes a divide by zero bug in mptcp_recvmsg() with a fix similar
to a recent one from Eric Dumazet for TCP introducing sk_wait_pending
flag. It should address an issue present in MPTCP from almost the
beginning, from v5.9.

Patch 3 fixes a possible list corruption on passive MPJ even if the race
seems very unlikely, better be safe than sorry. The possible issue is
present from v5.17.

Patch 4 consolidates fallback and non fallback state machines to avoid
leaking some MPTCP sockets. The fix is likely needed for versions from
v5.11.

Patch 5 drops code that is no longer used after the introduction of
patch 4/6. This is not really a fix but this patch can probably land in
the -net tree as well not to leave unused code.

Patch 6 ensures listeners are unhashed before updating their sk status
to avoid possible deadlocks when diag info are going to be retrieved
with a lock. Even if it should not be visible with the way we are
currently getting diag info, the issue is present from v5.17.
====================

Link: https://lore.kernel.org/r/20230620-upstream-net-20230620-misc-fixes-for-v6-4-v1-0-f36aa5eae8b9@tessares.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agomptcp: ensure listener is unhashed before updating the sk status
Paolo Abeni [Tue, 20 Jun 2023 16:24:23 +0000 (18:24 +0200)]
mptcp: ensure listener is unhashed before updating the sk status

The MPTCP protocol access the listener subflow in a lockless
manner in a couple of places (poll, diag). That works only if
the msk itself leaves the listener status only after that the
subflow itself has been closed/disconnected. Otherwise we risk
deadlock in diag, as reported by Christoph.

Address the issue ensuring that the first subflow (the listener
one) is always disconnected before updating the msk socket status.

Reported-by: Christoph Paasch <cpaasch@apple.com>
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/407
Fixes: b29fcfb54cd7 ("mptcp: full disconnect implementation")
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agomptcp: drop legacy code around RX EOF
Paolo Abeni [Tue, 20 Jun 2023 16:24:22 +0000 (18:24 +0200)]
mptcp: drop legacy code around RX EOF

Thanks to the previous patch -- "mptcp: consolidate fallback and non
fallback state machine" -- we can finally drop the "temporary hack"
used to detect rx eof.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agomptcp: consolidate fallback and non fallback state machine
Paolo Abeni [Tue, 20 Jun 2023 16:24:21 +0000 (18:24 +0200)]
mptcp: consolidate fallback and non fallback state machine

An orphaned msk releases the used resources via the worker,
when the latter first see the msk in CLOSED status.

If the msk status transitions to TCP_CLOSE in the release callback
invoked by the worker's final release_sock(), such instance of the
workqueue will not take any action.

Additionally the MPTCP code prevents scheduling the worker once the
socket reaches the CLOSE status: such msk resources will be leaked.

The only code path that can trigger the above scenario is the
__mptcp_check_send_data_fin() in fallback mode.

Address the issue removing the special handling of fallback socket
in __mptcp_check_send_data_fin(), consolidating the state machine
for fallback and non fallback socket.

Since non-fallback sockets do not send and do not receive data_fin,
the mptcp code can update the msk internal status to match the next
step in the SM every time data fin (ack) should be generated or
received.

As a consequence we can remove a bunch of checks for fallback from
the fastpath.

Fixes: 6e628cd3a8f7 ("mptcp: use mptcp release_cb for delayed tasks")
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agomptcp: fix possible list corruption on passive MPJ
Paolo Abeni [Tue, 20 Jun 2023 16:24:20 +0000 (18:24 +0200)]
mptcp: fix possible list corruption on passive MPJ

At passive MPJ time, if the msk socket lock is held by the user,
the new subflow is appended to the msk->join_list under the msk
data lock.

In mptcp_release_cb()/__mptcp_flush_join_list(), the subflows in
that list are moved from the join_list into the conn_list under the
msk socket lock.

Append and removal could race, possibly corrupting such list.
Address the issue splicing the join list into a temporary one while
still under the msk data lock.

Found by code inspection, the race itself should be almost impossible
to trigger in practice.

Fixes: 3e5014909b56 ("mptcp: cleanup MPJ subflow list handling")
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agomptcp: fix possible divide by zero in recvmsg()
Paolo Abeni [Tue, 20 Jun 2023 16:24:19 +0000 (18:24 +0200)]
mptcp: fix possible divide by zero in recvmsg()

Christoph reported a divide by zero bug in mptcp_recvmsg():

divide error: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 19978 Comm: syz-executor.6 Not tainted 6.4.0-rc2-gffcc7899081b #20
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014
RIP: 0010:__tcp_select_window+0x30e/0x420 net/ipv4/tcp_output.c:3018
Code: 11 ff 0f b7 cd c1 e9 0c b8 ff ff ff ff d3 e0 89 c1 f7 d1 01 cb 21 c3 eb 17 e8 2e 83 11 ff 31 db eb 0e e8 25 83 11 ff 89 d8 99 <f7> 7c 24 04 29 d3 65 48 8b 04 25 28 00 00 00 48 3b 44 24 10 75 60
RSP: 0018:ffffc90000a07a18 EFLAGS: 00010246
RAX: 000000000000ffd7 RBX: 000000000000ffd7 RCX: 0000000000040000
RDX: 0000000000000000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 000000000000ffd7 R08: ffffffff820cf297 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff8103d1a0 R12: 0000000000003f00
R13: 0000000000300000 R14: ffff888101cf3540 R15: 0000000000180000
FS:  00007f9af4c09640(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33824000 CR3: 000000012f241001 CR4: 0000000000170ee0
Call Trace:
 <TASK>
 __tcp_cleanup_rbuf+0x138/0x1d0 net/ipv4/tcp.c:1611
 mptcp_recvmsg+0xcb8/0xdd0 net/mptcp/protocol.c:2034
 inet_recvmsg+0x127/0x1f0 net/ipv4/af_inet.c:861
 ____sys_recvmsg+0x269/0x2b0 net/socket.c:1019
 ___sys_recvmsg+0xe6/0x260 net/socket.c:2764
 do_recvmmsg+0x1a5/0x470 net/socket.c:2858
 __do_sys_recvmmsg net/socket.c:2937 [inline]
 __se_sys_recvmmsg net/socket.c:2953 [inline]
 __x64_sys_recvmmsg+0xa6/0x130 net/socket.c:2953
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x47/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f9af58fc6a9
Code: 5c c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 4f 37 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007f9af4c08cd8 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00000000006bc050 RCX: 00007f9af58fc6a9
RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000f00 R11: 0000000000000246 R12: 00000000006bc05c
R13: fffffffffffffea8 R14: 00000000006bc050 R15: 000000000001fe40
 </TASK>

mptcp_recvmsg is allowed to release the msk socket lock when
blocking, and before re-acquiring it another thread could have
switched the sock to TCP_LISTEN status - with a prior
connect(AF_UNSPEC) - also clearing icsk_ack.rcv_mss.

Address the issue preventing the disconnect if some other process is
concurrently performing a blocking syscall on the same socket, alike
commit 4faeee0cf8a5 ("tcp: deny tcp_disconnect() when threads are waiting").

Fixes: a6b118febbab ("mptcp: add receive buffer auto-tuning")
Cc: stable@vger.kernel.org
Reported-by: Christoph Paasch <cpaasch@apple.com>
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/404
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Tested-by: Christoph Paasch <cpaasch@apple.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>