platform/kernel/linux-starfive.git
19 months agonet: stmmac: dwmac4: Allow platforms to specify some DMA/MTL offsets
Andrew Halaney [Tue, 11 Apr 2023 20:04:06 +0000 (15:04 -0500)]
net: stmmac: dwmac4: Allow platforms to specify some DMA/MTL offsets

Some platforms have dwmac4 implementations that have a different
address space layout than the default, resulting in the need to define
their own DMA/MTL offsets.

Extend the functions to allow a platform driver to indicate what its
addresses are, overriding the defaults.

Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agonet: stmmac: Pass stmmac_priv in some callbacks
Andrew Halaney [Tue, 11 Apr 2023 20:04:05 +0000 (15:04 -0500)]
net: stmmac: Pass stmmac_priv in some callbacks

Passing stmmac_priv to some of the callbacks allows hwif implementations
to grab some data that platforms can customize. Adjust the callbacks
accordingly in preparation of such a platform customization.

Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agonet: stmmac: Remove some unnecessary void pointers
Andrew Halaney [Tue, 11 Apr 2023 20:04:04 +0000 (15:04 -0500)]
net: stmmac: Remove some unnecessary void pointers

There's a few spots in the hardware interface where a void pointer is
used, but what's passed in and later cast out is always the same type.

Just use the proper type directly.

Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agonet: stmmac: Fix DMA typo
Andrew Halaney [Tue, 11 Apr 2023 20:04:03 +0000 (15:04 -0500)]
net: stmmac: Fix DMA typo

DAM is supposed to be DMA. Fix it to improve readability.

Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agonet: stmmac: Remove unnecessary if statement brackets
Andrew Halaney [Tue, 11 Apr 2023 20:04:02 +0000 (15:04 -0500)]
net: stmmac: Remove unnecessary if statement brackets

The brackets are unnecessary, remove them to match the coding style
used in the kernel.

Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agodt-bindings: net: qcom,ethqos: Add Qualcomm sc8280xp compatibles
Andrew Halaney [Tue, 11 Apr 2023 20:04:01 +0000 (15:04 -0500)]
dt-bindings: net: qcom,ethqos: Add Qualcomm sc8280xp compatibles

The sc8280xp has a new version of the ETHQOS hardware in it, EMAC v3.
Add a compatible for this.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Tested-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agodt-bindings: net: qcom,ethqos: Convert bindings to yaml
Bhupesh Sharma [Tue, 11 Apr 2023 20:04:00 +0000 (15:04 -0500)]
dt-bindings: net: qcom,ethqos: Convert bindings to yaml

Convert Qualcomm ETHQOS Ethernet devicetree binding to YAML.
In doing so add a new property for iommus since newer platforms support
using one, and without such make dtbs_check fails on them.

While at it, also update the MAINTAINERS file to point to the yaml
version of the bindings.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
[halaney: Remove duplicated properties, add MAINTAINERS and iommus]
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Tested-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agodt-bindings: net: snps,dwmac: Add Qualcomm Ethernet ETHQOS compatibles
Bhupesh Sharma [Tue, 11 Apr 2023 20:03:59 +0000 (15:03 -0500)]
dt-bindings: net: snps,dwmac: Add Qualcomm Ethernet ETHQOS compatibles

Add Qualcomm Ethernet ETHQOS compatible checks
in snps,dwmac YAML binding document.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Tested-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agodt-bindings: net: snps,dwmac: Update interrupt-names
Bhupesh Sharma [Tue, 11 Apr 2023 20:03:58 +0000 (15:03 -0500)]
dt-bindings: net: snps,dwmac: Update interrupt-names

As commit fc191af1bb0d ("net: stmmac: platform: Fix misleading
interrupt error msg") noted, not every stmmac based platform
makes use of the 'eth_wake_irq' or 'eth_lpi' interrupts.

So, update the 'interrupt-names' inside 'snps,dwmac' YAML
bindings to reflect the same.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Tested-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agonet: enetc: workaround for unresponsive pMAC after receiving express traffic
Vladimir Oltean [Tue, 11 Apr 2023 19:26:45 +0000 (22:26 +0300)]
net: enetc: workaround for unresponsive pMAC after receiving express traffic

I have observed an issue where the RX direction of the LS1028A ENETC pMAC
seems unresponsive. The minimal procedure to reproduce the issue is:

1. Connect ENETC port 0 with a loopback RJ45 cable to one of the Felix
   switch ports (0).

2. Bring the ports up (MAC Merge layer is not enabled on either end).

3. Send a large quantity of unidirectional (express) traffic from Felix
   to ENETC. I tried altering frame size and frame count, and it doesn't
   appear to be specific to either of them, but rather, to the quantity
   of octets received. Lowering the frame count, the minimum quantity of
   packets to reproduce relatively consistently seems to be around 37000
   frames at 1514 octets (w/o FCS) each.

4. Using ethtool --set-mm, enable the pMAC in the Felix and in the ENETC
   ports, in both RX and TX directions, and with verification on both
   ends.

5. Wait for verification to complete on both sides.

6. Configure a traffic class as preemptible on both ends.

7. Send some packets again.

The issue is at step 5, where the verification process of ENETC ends
(meaning that Felix responds with an SMD-R and ENETC sees the response),
but the verification process of Felix never ends (it remains VERIFYING).

If step 3 is skipped or if ENETC receives less traffic than
approximately that threshold, the test runs all the way through
(verification succeeds on both ends, preemptible traffic passes fine).

If, between step 4 and 5, the step below is also introduced:

4.1. Disable and re-enable PM0_COMMAND_CONFIG bit RX_EN

then again, the sequence of steps runs all the way through, and
verification succeeds, even if there was the previous RX traffic
injected into ENETC.

Traffic sent *by* the ENETC port prior to enabling the MAC Merge layer
does not seem to influence the verification result, only received
traffic does.

The LS1028A manual does not mention any relationship between
PM0_COMMAND_CONFIG and MMCSR, and the hardware people don't seem to
know for now either.

The bit that is toggled to work around the issue is also toggled
by enetc_mac_enable(), called from phylink's mac_link_down() and
mac_link_up() methods - which is how the workaround was found:
verification would work after a link down/up.

Fixes: c7b9e8086902 ("net: enetc: add support for MAC Merge layer")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20230411192645.1896048-1-vladimir.oltean@nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agobnxt_en: Allow to set switchdev mode without existing VFs
Ivan Vecera [Tue, 11 Apr 2023 12:04:42 +0000 (14:04 +0200)]
bnxt_en: Allow to set switchdev mode without existing VFs

Remove an inability of bnxt_en driver to set eswitch to switchdev
mode without existing VFs by:

1. Allow to set switchdev mode in bnxt_dl_eswitch_mode_set() so
   representors are created only when num_vfs > 0 otherwise just
   set bp->eswitch_mode
2. Do not automatically change bp->eswitch_mode during
   bnxt_vf_reps_create() and bnxt_vf_reps_destroy() calls so
   the eswitch mode is managed only by an user by devlink.
   Just set temporarily bp->eswitch_mode to legacy to avoid
   re-opening of representors during destroy.
3. Create representors in bnxt_sriov_enable() if current eswitch
   mode is switchdev one

Tested by this sequence:
1. Set PF interface up
2. Set PF's eswitch mode to switchdev
3. Created N VFs
4. Checked that N representors were created
5. Set eswitch mode to legacy
6. Checked that representors were deleted
7. Set eswitch mode back to switchdev
8. Checked that representors exist again for VFs
9. Deleted all VFs
10. Checked that all representors were deleted as well
11. Checked that current eswitch mode is still switchdev

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Acked-by: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>
Link: https://lore.kernel.org/r/20230411120443.126055-1-ivecera@redhat.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agosctp: fix a potential overflow in sctp_ifwdtsn_skip
Xin Long [Mon, 10 Apr 2023 19:43:30 +0000 (15:43 -0400)]
sctp: fix a potential overflow in sctp_ifwdtsn_skip

Currently, when traversing ifwdtsn skips with _sctp_walk_ifwdtsn, it only
checks the pos against the end of the chunk. However, the data left for
the last pos may be < sizeof(struct sctp_ifwdtsn_skip), and dereference
it as struct sctp_ifwdtsn_skip may cause coverflow.

This patch fixes it by checking the pos against "the end of the chunk -
sizeof(struct sctp_ifwdtsn_skip)" in sctp_ifwdtsn_skip, similar to
sctp_fwdtsn_skip.

Fixes: 0fc2ea922c8a ("sctp: implement validate_ftsn for sctp_stream_interleave")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/2a71bffcd80b4f2c61fac6d344bb2f11c8fd74f7.1681155810.git.lucien.xin@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agoMerge tag 'amd-drm-fixes-6.3-2023-04-12' of https://gitlab.freedesktop.org/agd5f...
Daniel Vetter [Thu, 13 Apr 2023 07:57:19 +0000 (09:57 +0200)]
Merge tag 'amd-drm-fixes-6.3-2023-04-12' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-6.3-2023-04-12:

amdgpu:
- SMU13 fixes
- DP MST fix

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230412215637.7881-1-alexander.deucher@amd.com
19 months agonet: qrtr: Fix an uninit variable access bug in qrtr_tx_resume()
Ziyang Xuan [Mon, 10 Apr 2023 01:23:52 +0000 (09:23 +0800)]
net: qrtr: Fix an uninit variable access bug in qrtr_tx_resume()

Syzbot reported a bug as following:

=====================================================
BUG: KMSAN: uninit-value in qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230
 qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230
 qrtr_endpoint_post+0xf85/0x11b0 net/qrtr/af_qrtr.c:519
 qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108
 call_write_iter include/linux/fs.h:2189 [inline]
 aio_write+0x63a/0x950 fs/aio.c:1600
 io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019
 __do_sys_io_submit fs/aio.c:2078 [inline]
 __se_sys_io_submit+0x293/0x770 fs/aio.c:2048
 __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:766 [inline]
 slab_alloc_node mm/slub.c:3452 [inline]
 __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491
 __do_kmalloc_node mm/slab_common.c:967 [inline]
 __kmalloc_node_track_caller+0x114/0x3b0 mm/slab_common.c:988
 kmalloc_reserve net/core/skbuff.c:492 [inline]
 __alloc_skb+0x3af/0x8f0 net/core/skbuff.c:565
 __netdev_alloc_skb+0x120/0x7d0 net/core/skbuff.c:630
 qrtr_endpoint_post+0xbd/0x11b0 net/qrtr/af_qrtr.c:446
 qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108
 call_write_iter include/linux/fs.h:2189 [inline]
 aio_write+0x63a/0x950 fs/aio.c:1600
 io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019
 __do_sys_io_submit fs/aio.c:2078 [inline]
 __se_sys_io_submit+0x293/0x770 fs/aio.c:2048
 __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

It is because that skb->len requires at least sizeof(struct qrtr_ctrl_pkt)
in qrtr_tx_resume(). And skb->len equals to size in qrtr_endpoint_post().
But size is less than sizeof(struct qrtr_ctrl_pkt) when qrtr_cb->type
equals to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() under the syzbot
scenario. This triggers the uninit variable access bug.

Add size check when qrtr_cb->type equals to QRTR_TYPE_RESUME_TX in
qrtr_endpoint_post() to fix the bug.

Fixes: 5fdeb0d372ab ("net: qrtr: Implement outgoing flow control")
Reported-by: syzbot+4436c9630a45820fda76@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=c14607f0963d27d5a3d5f4c8639b500909e43540
Suggested-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230410012352.3997823-1-william.xuanziyang@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agoMerge branch 'net-thunderbolt-fix-for-sparse-warnings-and-typos'
Jakub Kicinski [Thu, 13 Apr 2023 04:09:14 +0000 (21:09 -0700)]
Merge branch 'net-thunderbolt-fix-for-sparse-warnings-and-typos'

Mika Westerberg says:

====================
net: thunderbolt: Fix for sparse warnings and typos

This series tries to fix the rest of the sparse warnings generated
against the driver. While there fix the two typos in comments as well.

The previous version of the series can be found here:
  https://lore.kernel.org/netdev/20230404053636.51597-1-mika.westerberg@linux.intel.com/
====================

Link: https://lore.kernel.org/r/20230411091049.12998-1-mika.westerberg@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agonet: thunderbolt: Fix typos in comments
Mika Westerberg [Tue, 11 Apr 2023 09:10:49 +0000 (12:10 +0300)]
net: thunderbolt: Fix typos in comments

Fix two typos in comments:

  blongs -> belongs
  UPD -> UDP

No functional changes.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agonet: thunderbolt: Fix sparse warnings in tbnet_xmit_csum_and_map()
Mika Westerberg [Tue, 11 Apr 2023 09:10:48 +0000 (12:10 +0300)]
net: thunderbolt: Fix sparse warnings in tbnet_xmit_csum_and_map()

Fixes the following warning when the driver is built with sparse checks
enabled:

main.c:993:23: warning: incorrect type in initializer (different base types)
main.c:993:23:    expected restricted __wsum [usertype] wsum
main.c:993:23:    got restricted __be32 [usertype]

No functional changes intended.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agonet: thunderbolt: Fix sparse warnings in tbnet_check_frame() and tbnet_poll()
Mika Westerberg [Tue, 11 Apr 2023 09:10:47 +0000 (12:10 +0300)]
net: thunderbolt: Fix sparse warnings in tbnet_check_frame() and tbnet_poll()

Fixes the following warnings when the driver is built with sparse
checks enabled:

main.c:767:47: warning: restricted __le32 degrades to integer
main.c:775:47: warning: restricted __le16 degrades to integer
main.c:776:44: warning: restricted __le16 degrades to integer
main.c:876:40: warning: incorrect type in assignment (different base types)
main.c:876:40:    expected restricted __le32 [usertype] frame_size
main.c:876:40:    got unsigned int [assigned] [usertype] frame_size
main.c:877:41: warning: incorrect type in assignment (different base types)
main.c:877:41:    expected restricted __le32 [usertype] frame_count
main.c:877:41:    got unsigned int [usertype]
main.c:878:41: warning: incorrect type in assignment (different base types)
main.c:878:41:    expected restricted __le16 [usertype] frame_index
main.c:878:41:    got unsigned short [usertype]
main.c:879:38: warning: incorrect type in assignment (different base types)
main.c:879:38:    expected restricted __le16 [usertype] frame_id
main.c:879:38:    got unsigned short [usertype]
main.c:880:62: warning: restricted __le32 degrades to integer
main.c:880:35: warning: restricted __le16 degrades to integer

No functional changes intended.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agortnetlink: Restore RTM_NEW/DELLINK notification behavior
Martin Willi [Tue, 11 Apr 2023 07:43:19 +0000 (09:43 +0200)]
rtnetlink: Restore RTM_NEW/DELLINK notification behavior

The commits referenced below allows userspace to use the NLM_F_ECHO flag
for RTM_NEW/DELLINK operations to receive unicast notifications for the
affected link. Prior to these changes, applications may have relied on
multicast notifications to learn the same information without specifying
the NLM_F_ECHO flag.

For such applications, the mentioned commits changed the behavior for
requests not using NLM_F_ECHO. Multicast notifications are still received,
but now use the portid of the requester and the sequence number of the
request instead of zero values used previously. For the application, this
message may be unexpected and likely handled as a response to the
NLM_F_ACKed request, especially if it uses the same socket to handle
requests and notifications.

To fix existing applications relying on the old notification behavior,
set the portid and sequence number in the notification only if the
request included the NLM_F_ECHO flag. This restores the old behavior
for applications not using it, but allows unicasted notifications for
others.

Fixes: f3a63cce1b4f ("rtnetlink: Honour NLM_F_ECHO flag in rtnl_delete_link")
Fixes: d88e136cab37 ("rtnetlink: Honour NLM_F_ECHO flag in rtnl_newlink_create")
Signed-off-by: Martin Willi <martin@strongswan.org>
Acked-by: Guillaume Nault <gnault@redhat.com>
Acked-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://lore.kernel.org/r/20230411074319.24133-1-martin@strongswan.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agonet: ethernet: Add missing depends on MDIO_DEVRES
Andrew Lunn [Sun, 9 Apr 2023 15:02:04 +0000 (17:02 +0200)]
net: ethernet: Add missing depends on MDIO_DEVRES

A number of MDIO drivers make use of devm_mdiobus_alloc_size(). This
is only available when CONFIG_MDIO_DEVRES is enabled. Add missing
depends or selects, depending on if there are circular dependencies or
not. This avoids linker errors, especially for randconfig builds.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20230409150204.2346231-1-andrew@lunn.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agomm: Fix copy_from_user_nofault().
Alexei Starovoitov [Mon, 10 Apr 2023 17:43:44 +0000 (19:43 +0200)]
mm: Fix copy_from_user_nofault().

There are several issues with copy_from_user_nofault():

- access_ok() is designed for user context only and for that reason
it has WARN_ON_IN_IRQ() which triggers when bpf, kprobe, eprobe
and perf on ppc are calling it from irq.

- it's missing nmi_uaccess_okay() which is a nop on all architectures
except x86 where it's required.
The comment in arch/x86/mm/tlb.c explains the details why it's necessary.
Calling copy_from_user_nofault() from bpf, [ke]probe without this check is not safe.

- __copy_from_user_inatomic() under CONFIG_HARDENED_USERCOPY is calling
check_object_size()->__check_object_size()->check_heap_object()->find_vmap_area()->spin_lock()
which is not safe to do from bpf, [ke]probe and perf due to potential deadlock.

Fix all three issues. At the end the copy_from_user_nofault() becomes
equivalent to copy_from_user_nmi() from safety point of view with
a difference in the return value.

Reported-by: Hsin-Wei Hung <hsinweih@uci.edu>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Florian Lehner <dev@der-flo.net>
Tested-by: Hsin-Wei Hung <hsinweih@uci.edu>
Tested-by: Florian Lehner <dev@der-flo.net>
Link: https://lore.kernel.org/r/20230410174345.4376-2-dev@der-flo.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
19 months agoMerge tag 'for-linus-2023041201' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 13 Apr 2023 00:26:00 +0000 (17:26 -0700)]
Merge tag 'for-linus-2023041201' of git://git./linux/kernel/git/hid/hid

Pull HID fixes from Jiri Kosina:

 - kernel panic fix for intel-ish-hid driver (Tanu Malhotra)

 - buffer overflow fix in hid-sensor-custom driver (Todd Brandt)

 - two device specific quirks (Alessandro Manca, Philippe Troin)

* tag 'for-linus-2023041201' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
  HID: intel-ish-hid: Fix kernel panic during warm reset
  HID: hid-sensor-custom: Fix buffer overrun in device name
  HID: topre: Add support for 87 keys Realforce R2
  HID: add HP 13t-aw100 & 14t-ea100 digitizer battery quirks

19 months agoMerge tag 'dmaengine-fix-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul...
Linus Torvalds [Thu, 13 Apr 2023 00:20:55 +0000 (17:20 -0700)]
Merge tag 'dmaengine-fix-6.3' of git://git./linux/kernel/git/vkoul/dmaengine

Pull dmaengine fixes from Vinod Koul:
 "A couple of fixes in apple driver, core and kernedoc fix for dmaengine
  subsystem:

   - apple admac driver fixes for current_tx, src_addr_widths and
     global' interrupt flags handling

   - xdma kerneldoc fix

   - core fix for use of devm_add_action_or_reset"

* tag 'dmaengine-fix-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine:
  dmaengine: apple-admac: Fix 'current_tx' not getting freed
  dmaengine: apple-admac: Set src_addr_widths capability
  dmaengine: apple-admac: Handle 'global' interrupt flags
  dmaengine: xilinx: xdma: Fix some kernel-doc comments
  dmaengine: Actually use devm_add_action_or_reset()

19 months agoMerge branch 'Add FOU support for externally controlled ipip devices'
Alexei Starovoitov [Wed, 12 Apr 2023 23:40:39 +0000 (16:40 -0700)]
Merge branch 'Add FOU support for externally controlled ipip devices'

Christian Ehrig says:

====================

This patch set adds support for using FOU or GUE encapsulation with
an ipip device operating in collect-metadata mode and a set of kfuncs
for controlling encap parameters exposed to a BPF tc-hook.

BPF tc-hooks allow us to read tunnel metadata (like remote IP addresses)
in the ingress path of an externally controlled tunnel interface via
the bpf_skb_get_tunnel_{key,opt} bpf-helpers. Packets can then be
redirected to the same or a different externally controlled tunnel
interface by overwriting metadata via the bpf_skb_set_tunnel_{key,opt}
helpers and a call to bpf_redirect. This enables us to redirect packets
between tunnel interfaces - and potentially change the encapsulation
type - using only a single BPF program.

Today this approach works fine for a couple of tunnel combinations.
For example: redirecting packets between Geneve and GRE interfaces or
GRE and plain ipip interfaces. However, redirecting using FOU or GUE is
not supported today. The ip_tunnel module does not allow us to egress
packets using additional UDP encapsulation from an ipip device in
collect-metadata mode.

Patch 1 lifts this restriction by adding a struct ip_tunnel_encap to
the tunnel metadata. It can be filled by a new BPF kfunc introduced
in Patch 2 and evaluated by the ip_tunnel egress path. This will allow
us to use FOU and GUE encap with externally controlled ipip devices.

Patch 2 introduces two new BPF kfuncs: bpf_skb_{set,get}_fou_encap.
These helpers can be used to set and get UDP encap parameters from the
BPF tc-hook doing the packet redirect.

Patch 3 adds BPF tunnel selftests using the two kfuncs.
---
v3:
 - Integrate selftest into test_progs (Alexei)
v2:
 - Fixes for checkpatch.pl
 - Fixes for kernel test robot
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
19 months agoselftests/bpf: Test FOU kfuncs for externally controlled ipip devices
Christian Ehrig [Fri, 7 Apr 2023 13:38:55 +0000 (15:38 +0200)]
selftests/bpf: Test FOU kfuncs for externally controlled ipip devices

Add tests for FOU and GUE encapsulation via the bpf_skb_{set,get}_fou_encap
kfuncs, using ipip devices in collect-metadata mode.

These tests make sure that we can successfully set and obtain FOU and GUE
encap parameters using ingress / egress BPF tc-hooks.

Signed-off-by: Christian Ehrig <cehrig@cloudflare.com>
Link: https://lore.kernel.org/r/040193566ddbdb0b53eb359f7ac7bbd316f338b5.1680874078.git.cehrig@cloudflare.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
19 months agobpf,fou: Add bpf_skb_{set,get}_fou_encap kfuncs
Christian Ehrig [Fri, 7 Apr 2023 13:38:54 +0000 (15:38 +0200)]
bpf,fou: Add bpf_skb_{set,get}_fou_encap kfuncs

Add two new kfuncs that allow a BPF tc-hook, installed on an ipip
device in collect-metadata mode, to control FOU encap parameters on a
per-packet level. The set of kfuncs is registered with the fou module.

The bpf_skb_set_fou_encap kfunc is supposed to be used in tandem and after
a successful call to the bpf_skb_set_tunnel_key bpf-helper. UDP source and
destination ports can be controlled by passing a struct bpf_fou_encap. A
source port of zero will auto-assign a source port. enum bpf_fou_encap_type
is used to specify if the egress path should FOU or GUE encap the packet.

On the ingress path bpf_skb_get_fou_encap can be used to read UDP source
and destination ports from the receiver's point of view and allows for
packet multiplexing across different destination ports within a single
BPF program and ipip device.

Signed-off-by: Christian Ehrig <cehrig@cloudflare.com>
Link: https://lore.kernel.org/r/e17c94a646b63e78ce0dbf3f04b2c33dc948a32d.1680874078.git.cehrig@cloudflare.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
19 months agoipip,ip_tunnel,sit: Add FOU support for externally controlled ipip devices
Christian Ehrig [Fri, 7 Apr 2023 13:38:53 +0000 (15:38 +0200)]
ipip,ip_tunnel,sit: Add FOU support for externally controlled ipip devices

Today ipip devices in collect-metadata mode don't allow for sending FOU
or GUE encapsulated packets. This patch lifts the restriction by adding
a struct ip_tunnel_encap to the tunnel metadata.

On the egress path, the members of this struct can be set by the
bpf_skb_set_fou_encap kfunc via a BPF tc-hook. Instead of dropping packets
wishing to use additional UDP encapsulation, ip_md_tunnel_xmit now
evaluates the contents of this struct and adds the corresponding FOU or
GUE header. Furthermore, it is making sure that additional header bytes
are taken into account for PMTU discovery.

On the ingress path, an ipip device in collect-metadata mode will fill this
struct and a BPF tc-hook can obtain the information via a call to the
bpf_skb_get_fou_encap kfunc.

The minor change to ip_tunnel_encap, which now takes a pointer to
struct ip_tunnel_encap instead of struct ip_tunnel, allows us to control
FOU encap type and parameters on a per packet-level.

Signed-off-by: Christian Ehrig <cehrig@cloudflare.com>
Link: https://lore.kernel.org/r/cfea47de655d0f870248abf725932f851b53960a.1680874078.git.cehrig@cloudflare.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
19 months agobpf, sockmap: fix deadlocks in the sockhash and sockmap
Xin Liu [Thu, 6 Apr 2023 12:26:22 +0000 (20:26 +0800)]
bpf, sockmap: fix deadlocks in the sockhash and sockmap

When huang uses sched_switch tracepoint, the tracepoint
does only one thing in the mounted ebpf program, which
deletes the fixed elements in sockhash ([0])

It seems that elements in sockhash are rarely actively
deleted by users or ebpf program. Therefore, we do not
pay much attention to their deletion. Compared with hash
maps, sockhash only provides spin_lock_bh protection.
This causes it to appear to have self-locking behavior
in the interrupt context.

  [0]:https://lore.kernel.org/all/CABcoxUayum5oOqFMMqAeWuS8+EzojquSOSyDA3J_2omY=2EeAg@mail.gmail.com/

Reported-by: Hsin-Wei Hung <hsinweih@uci.edu>
Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface")
Signed-off-by: Xin Liu <liuxin350@huawei.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/r/20230406122622.109978-1-liuxin350@huawei.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
19 months agodrm/amd/pm: correct the pcie link state check for SMU13
Evan Quan [Fri, 7 Apr 2023 09:12:15 +0000 (17:12 +0800)]
drm/amd/pm: correct the pcie link state check for SMU13

Update the driver implementations to fit those data exposed
by PMFW.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.1.x
19 months agodrm/amd/pm: correct SMU13.0.7 max shader clock reporting
Horatio Zhang [Thu, 6 Apr 2023 05:32:14 +0000 (13:32 +0800)]
drm/amd/pm: correct SMU13.0.7 max shader clock reporting

Correct the max shader clock reporting on SMU
13.0.7.

Signed-off-by: Horatio Zhang <Hongkun.Zhang@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.1.x
19 months agodrm/amd/pm: correct SMU13.0.7 pstate profiling clock settings
Horatio Zhang [Thu, 6 Apr 2023 03:17:38 +0000 (11:17 +0800)]
drm/amd/pm: correct SMU13.0.7 pstate profiling clock settings

Correct the pstate standard/peak profiling mode clock
settings for SMU13.0.7.

Signed-off-by: Horatio Zhang <Hongkun.Zhang@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.1.x
19 months agodrm/amd/display: Pass the right info to drm_dp_remove_payload
Wayne Lin [Fri, 17 Feb 2023 05:26:56 +0000 (13:26 +0800)]
drm/amd/display: Pass the right info to drm_dp_remove_payload

[Why & How]
drm_dp_remove_payload() interface was changed. Correct amdgpu dm code
to pass the right parameter to the drm helper function.

Reviewed-by: Jerry Zuo <Jerry.Zuo@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
19 months agobpf,docs: Remove references to bpf_cgroup_kptr_get()
David Vernet [Tue, 11 Apr 2023 04:16:33 +0000 (23:16 -0500)]
bpf,docs: Remove references to bpf_cgroup_kptr_get()

The bpf_cgroup_kptr_get() kfunc has been removed, and
bpf_cgroup_acquire() / bpf_cgroup_release() now have the same semantics
as bpf_task_acquire() / bpf_task_release(). This patch updates the BPF
documentation to reflect this.

Signed-off-by: David Vernet <void@manifault.com>
Link: https://lore.kernel.org/r/20230411041633.179404-3-void@manifault.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
19 months agobpf: Remove bpf_cgroup_kptr_get() kfunc
David Vernet [Tue, 11 Apr 2023 04:16:32 +0000 (23:16 -0500)]
bpf: Remove bpf_cgroup_kptr_get() kfunc

Now that bpf_cgroup_acquire() is KF_RCU | KF_RET_NULL,
bpf_cgroup_kptr_get() is redundant. Let's remove it, and update
selftests to instead use bpf_cgroup_acquire() where appropriate. The
next patch will update the BPF documentation to not mention
bpf_cgroup_kptr_get().

Signed-off-by: David Vernet <void@manifault.com>
Link: https://lore.kernel.org/r/20230411041633.179404-2-void@manifault.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
19 months agobpf: Make bpf_cgroup_acquire() KF_RCU | KF_RET_NULL
David Vernet [Tue, 11 Apr 2023 04:16:31 +0000 (23:16 -0500)]
bpf: Make bpf_cgroup_acquire() KF_RCU | KF_RET_NULL

struct cgroup is already an RCU-safe type in the verifier. We can
therefore update bpf_cgroup_acquire() to be KF_RCU | KF_RET_NULL, and
subsequently remove bpf_cgroup_kptr_get(). This patch does the first of
these by updating bpf_cgroup_acquire() to be KF_RCU | KF_RET_NULL, and
also updates selftests accordingly.

Signed-off-by: David Vernet <void@manifault.com>
Link: https://lore.kernel.org/r/20230411041633.179404-1-void@manifault.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
19 months agobpf: Handle NULL in bpf_local_storage_free.
Alexei Starovoitov [Wed, 12 Apr 2023 17:12:52 +0000 (10:12 -0700)]
bpf: Handle NULL in bpf_local_storage_free.

During OOM bpf_local_storage_alloc() may fail to allocate 'storage' and
call to bpf_local_storage_free() with NULL pointer will cause a crash like:
[ 271718.917646] BUG: kernel NULL pointer dereference, address: 00000000000000a0
[ 271719.019620] RIP: 0010:call_rcu+0x2d/0x240
[ 271719.216274]  bpf_local_storage_alloc+0x19e/0x1e0
[ 271719.250121]  bpf_local_storage_update+0x33b/0x740

Fixes: 7e30a8477b0b ("bpf: Add bpf_local_storage_free()")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230412171252.15635-1-alexei.starovoitov@gmail.com
19 months agonetfs: Fix netfs_extract_iter_to_sg() for ITER_UBUF/IOVEC
David Howells [Wed, 12 Apr 2023 12:18:57 +0000 (13:18 +0100)]
netfs: Fix netfs_extract_iter_to_sg() for ITER_UBUF/IOVEC

Fix netfs_extract_iter_to_sg() for ITER_UBUF and ITER_IOVEC to set the
size of the page to the part of the page extracted, not the remaining
amount of data in the extracted page array at that point.

This doesn't yet affect anything as cifs, the only current user, only
passes in non-user-backed iterators.

Fixes: 018584697533 ("netfs: Add a function to extract an iterator into a scatterlist")
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Cc: Steve French <sfrench@samba.org>
Cc: Shyam Prasad N <nspmangalore@gmail.com>
Cc: Rohith Surabattula <rohiths.msft@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
19 months agoMerge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes
Maarten Lankhorst [Wed, 12 Apr 2023 10:01:32 +0000 (12:01 +0200)]
Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes

We were stuck on rc2, should at least attempt to track drm-fixes
slightly.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
19 months agonet: ti/cpsw: Add explicit platform_device.h and of_platform.h includes
Rob Herring [Mon, 10 Apr 2023 23:27:19 +0000 (18:27 -0500)]
net: ti/cpsw: Add explicit platform_device.h and of_platform.h includes

TI CPSW uses of_platform_* functions which are declared in of_platform.h.
of_platform.h gets implicitly included by of_device.h, but that is going
to be removed soon. Nothing else depends on of_device.h so it can be
dropped. of_platform.h also implicitly includes platform_device.h, so
add an explicit include for it, too.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
19 months agonet: wwan: iosm: Fix error handling path in ipc_pcie_probe()
Harshit Mogalapalli [Sat, 8 Apr 2023 19:43:21 +0000 (12:43 -0700)]
net: wwan: iosm: Fix error handling path in ipc_pcie_probe()

Smatch reports:
drivers/net/wwan/iosm/iosm_ipc_pcie.c:298 ipc_pcie_probe()
warn: missing unwind goto?

When dma_set_mask fails it directly returns without disabling pci
device and freeing ipc_pcie. Fix this my calling a correct goto label

As dma_set_mask returns either 0 or -EIO, we can use a goto label, as
it finally returns -EIO.

Add a set_mask_fail goto label which stands consistent with other goto
labels in this function..

Fixes: 035e3befc191 ("net: wwan: iosm: fix driver not working with INTEL_IOMMU disabled")
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
19 months agosmc: Fix use-after-free in tcp_write_timer_handler().
Kuniyuki Iwashima [Sat, 8 Apr 2023 18:49:43 +0000 (11:49 -0700)]
smc: Fix use-after-free in tcp_write_timer_handler().

With Eric's ref tracker, syzbot finally found a repro for
use-after-free in tcp_write_timer_handler() by kernel TCP
sockets. [0]

If SMC creates a kernel socket in __smc_create(), the kernel
socket is supposed to be freed in smc_clcsock_release() by
calling sock_release() when we close() the parent SMC socket.

However, at the end of smc_clcsock_release(), the kernel
socket's sk_state might not be TCP_CLOSE.  This means that
we have not called inet_csk_destroy_sock() in __tcp_close()
and have not stopped the TCP timers.

The kernel socket's TCP timers can be fired later, so we
need to hold a refcnt for net as we do for MPTCP subflows
in mptcp_subflow_create_socket().

[0]:
leaked reference.
 sk_alloc (./include/net/net_namespace.h:335 net/core/sock.c:2108)
 inet_create (net/ipv4/af_inet.c:319 net/ipv4/af_inet.c:244)
 __sock_create (net/socket.c:1546)
 smc_create (net/smc/af_smc.c:3269 net/smc/af_smc.c:3284)
 __sock_create (net/socket.c:1546)
 __sys_socket (net/socket.c:1634 net/socket.c:1618 net/socket.c:1661)
 __x64_sys_socket (net/socket.c:1672)
 do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
 entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
==================================================================
BUG: KASAN: slab-use-after-free in tcp_write_timer_handler (net/ipv4/tcp_timer.c:378 net/ipv4/tcp_timer.c:624 net/ipv4/tcp_timer.c:594)
Read of size 1 at addr ffff888052b65e0d by task syzrepro/18091

CPU: 0 PID: 18091 Comm: syzrepro Tainted: G        W          6.3.0-rc4-01174-gb5d54eb5899a #7
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-1.amzn2022.0.1 04/01/2014
Call Trace:
 <IRQ>
 dump_stack_lvl (lib/dump_stack.c:107)
 print_report (mm/kasan/report.c:320 mm/kasan/report.c:430)
 kasan_report (mm/kasan/report.c:538)
 tcp_write_timer_handler (net/ipv4/tcp_timer.c:378 net/ipv4/tcp_timer.c:624 net/ipv4/tcp_timer.c:594)
 tcp_write_timer (./include/linux/spinlock.h:390 net/ipv4/tcp_timer.c:643)
 call_timer_fn (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/timer.h:127 kernel/time/timer.c:1701)
 __run_timers.part.0 (kernel/time/timer.c:1752 kernel/time/timer.c:2022)
 run_timer_softirq (kernel/time/timer.c:2037)
 __do_softirq (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/irq.h:142 kernel/softirq.c:572)
 __irq_exit_rcu (kernel/softirq.c:445 kernel/softirq.c:650)
 irq_exit_rcu (kernel/softirq.c:664)
 sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1107 (discriminator 14))
 </IRQ>

Fixes: ac7138746e14 ("smc: establish new socket family")
Reported-by: syzbot+7e1e1bdb852961150198@syzkaller.appspotmail.com
Link: https://lore.kernel.org/netdev/000000000000a3f51805f8bcc43a@google.com/
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Tony Lu <tonylu@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
19 months agoksz884x: Remove unused functions
Simon Horman [Sat, 8 Apr 2023 07:47:54 +0000 (09:47 +0200)]
ksz884x: Remove unused functions

Remove unused functions.

These functions may have some value in documenting the
hardware. But that information may be accessed via SCM history.

Flagged by clang-16 with W=1.
No functional change intended.
Compile tested only.

Signed-off-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
19 months agoionic: Don't overwrite the cyclecounter bitmask
Brett Creeley [Fri, 7 Apr 2023 18:45:39 +0000 (11:45 -0700)]
ionic: Don't overwrite the cyclecounter bitmask

The driver was incorrectly overwriting the cyclecounter bitmask,
which was truncating it and not aligning to the hardware mask value.
This isn't causing any issues, but it's wrong. Fix this by not
constraining the cyclecounter/hardware mask.

Luckily, this seems to cause no issues, which is why this change
doesn't have a fixes tag and isn't being sent to net. However, if
any transformations from time->cycles are needed in the future,
this change will be needed.

Suggested-by: Allen Hubbe <allen.hubbe@amd.com>
Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
19 months agoMerge branch 'rk3588-error-prints'
David S. Miller [Wed, 12 Apr 2023 08:21:27 +0000 (09:21 +0100)]
Merge branch 'rk3588-error-prints'

Sebastian Reichel says:

====================
stmmac: Fix RK3588 error prints

This fixes a couple of false positive error messages printed
by stmmac on RK3588. I expect them to go via net-next since
the fixes are not critical.

Changes since PATCHv1:
 * https://lore.kernel.org/all/20230317174243.61500-1-sebastian.reichel@collabora.com/
 * Add Fixes tags
 * Use loop to request clocks
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
19 months agonet: ethernet: stmmac: dwmac-rk: fix optional phy regulator handling
Sebastian Reichel [Fri, 7 Apr 2023 16:11:29 +0000 (18:11 +0200)]
net: ethernet: stmmac: dwmac-rk: fix optional phy regulator handling

The usual devm_regulator_get() call already handles "optional"
regulators by returning a valid dummy and printing a warning
that the dummy regulator should be described properly. This
code open coded the same behaviour, but masked any errors that
are not -EPROBE_DEFER and is quite noisy.

This change effectively unmasks and propagates regulators errors
not involving -ENODEV, downgrades the error print to warning level
if no regulator is specified and captures the probe defer message
for /sys/kernel/debug/devices_deferred.

Fixes: 2e12f536635f ("net: stmmac: dwmac-rk: Use standard devicetree property for phy regulator")
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
19 months agonet: ethernet: stmmac: dwmac-rk: rework optional clock handling
Sebastian Reichel [Fri, 7 Apr 2023 16:11:28 +0000 (18:11 +0200)]
net: ethernet: stmmac: dwmac-rk: rework optional clock handling

The clock requesting code is quite repetitive. Fix this by requesting
the clocks via devm_clk_bulk_get_optional. The optional variant has been
used, since this is effectively what the old code did. The exact clocks
required depend on the platform and configuration. As a side effect
this change adds correct -EPROBE_DEFER handling.

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Fixes: 7ad269ea1a2b ("GMAC: add driver for Rockchip RK3288 SoCs integrated GMAC")
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
19 months agoMerge branch 'dsa-trace-events'
David S. Miller [Wed, 12 Apr 2023 07:36:07 +0000 (08:36 +0100)]
Merge branch 'dsa-trace-events'

Vladimir Oltean says:

====================
DSA trace events

This series introduces the "dsa" trace event class, with the following
events:

$ trace-cmd list | grep dsa
dsa
dsa:dsa_fdb_add_hw
dsa:dsa_mdb_add_hw
dsa:dsa_fdb_del_hw
dsa:dsa_mdb_del_hw
dsa:dsa_fdb_add_bump
dsa:dsa_mdb_add_bump
dsa:dsa_fdb_del_drop
dsa:dsa_mdb_del_drop
dsa:dsa_fdb_del_not_found
dsa:dsa_mdb_del_not_found
dsa:dsa_lag_fdb_add_hw
dsa:dsa_lag_fdb_add_bump
dsa:dsa_lag_fdb_del_hw
dsa:dsa_lag_fdb_del_drop
dsa:dsa_lag_fdb_del_not_found
dsa:dsa_vlan_add_hw
dsa:dsa_vlan_del_hw
dsa:dsa_vlan_add_bump
dsa:dsa_vlan_del_drop
dsa:dsa_vlan_del_not_found

These are useful to debug refcounting issues on CPU and DSA ports, where
entries may remain lingering, or may be removed too soon, depending on
bugs in higher layers of the network stack.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
19 months agonet: dsa: add trace points for VLAN operations
Vladimir Oltean [Fri, 7 Apr 2023 14:14:51 +0000 (17:14 +0300)]
net: dsa: add trace points for VLAN operations

These are not as critical as the FDB/MDB trace points (I'm not aware of
outstanding VLAN related bugs), but maybe they are useful to somebody,
either debugging something or simply trying to learn more.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
19 months agonet: dsa: add trace points for FDB/MDB operations
Vladimir Oltean [Fri, 7 Apr 2023 14:14:50 +0000 (17:14 +0300)]
net: dsa: add trace points for FDB/MDB operations

DSA performs non-trivial housekeeping of unicast and multicast addresses
on shared (CPU and DSA) ports, and puts a bit of pressure on higher
layers, requiring them to behave correctly (remove these addresses
exactly as many times as they were added). Otherwise, either addresses
linger around forever, or DSA returns -ENOENT complaining that entries
that were already deleted must be deleted again.

To aid debugging, introduce some trace points specifically for FDB and
MDB - that's where some of the bugs still are right now.

Some bugs I have seen were also due to race conditions, see:
630fd4822af2 ("net: dsa: flush switchdev workqueue on bridge join error path")
a2614140dc0f ("net: dsa: mv88e6xxx: flush switchdev FDB workqueue before removing VLAN")

so it would be good to not disturb the timing too much, hence the choice
to use trace points vs regular dev_dbg().

I've had these for some time on my computer in a less polished form, and
they've proven useful. What I found most useful was to enable
CONFIG_BOOTTIME_TRACING, add "trace_event=dsa" to the kernel cmdline,
and run "cat /sys/kernel/debug/tracing/trace". This is to debug more
complex environments with network managers started by the init system,
things like that.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
19 months agoqlcnic: check pci_reset_function result
Denis Plotnikov [Fri, 7 Apr 2023 07:18:49 +0000 (10:18 +0300)]
qlcnic: check pci_reset_function result

Static code analyzer complains to unchecked return value.
The result of pci_reset_function() is unchecked.
Despite, the issue is on the FLR supported code path and in that
case reset can be done with pcie_flr(), the patch uses less invasive
approach by adding the result check of pci_reset_function().

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 7e2cf4feba05 ("qlcnic: change driver hardware interface mechanism")
Signed-off-by: Denis Plotnikov <den-plotnikov@yandex-team.ru>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
19 months agoMerge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue
Jakub Kicinski [Wed, 12 Apr 2023 04:37:53 +0000 (21:37 -0700)]
Merge branch '40GbE' of git://git./linux/kernel/git/tnguy/net-queue

Tony Nguyen says:

====================
iavf: fix racing in VLANs

Ahmed Zaki says:

This patchset mainly fixes a racing issue in the iavf where the number of
VLANs in the vlan_filter_list might be more than the PF limit. To fix that,
we get rid of the cvlans and svlans bitmaps and keep all the required info
in the list.

The second patch adds two new states that are needed so that we keep the
VLAN info while the interface goes DOWN:
    -- DISABLE    (notify PF, but keep the filter in the list)
    -- INACTIVE   (dev is DOWN, filter is removed from PF)

Finally, the current code keeps each state in a separate bit field, which
is error prone. The first patch refactors that by replacing all bits with
a single enum. The changes are minimal where each bit change is replaced
with the new state value.

* '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue:
  iavf: remove active_cvlans and active_svlans bitmaps
  iavf: refactor VLAN filter states
====================

Link: https://lore.kernel.org/r/20230407210730.3046149-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agoMerge tag 'for-net-2023-04-10' of git://git.kernel.org/pub/scm/linux/kernel/git/bluet...
Jakub Kicinski [Wed, 12 Apr 2023 04:18:23 +0000 (21:18 -0700)]
Merge tag 'for-net-2023-04-10' of git://git./linux/kernel/git/bluetooth/bluetooth

Luiz Augusto von Dentz says:

====================
bluetooth pull request for net:

 - Fix not setting Dath Path for broadcast sink
 - Fix not cleaning up on LE Connection failure
 - SCO: Fix possible circular locking dependency
 - L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}
 - Fix race condition in hidp_session_thread
 - btbcm: Fix logic error in forming the board name
 - btbcm: Fix use after free in btsdio_remove

* tag 'for-net-2023-04-10' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth:
  Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}
  Bluetooth: Set ISO Data Path on broadcast sink
  Bluetooth: hci_conn: Fix possible UAF
  Bluetooth: SCO: Fix possible circular locking dependency sco_sock_getsockopt
  Bluetooth: SCO: Fix possible circular locking dependency on sco_connect_cfm
  bluetooth: btbcm: Fix logic error in forming the board name.
  Bluetooth: btsdio: fix use after free bug in btsdio_remove due to race condition
  Bluetooth: Fix race condition in hidp_session_thread
  Bluetooth: Fix printing errors if LE Connection times out
  Bluetooth: hci_conn: Fix not cleaning up on LE Connection failure
====================

Link: https://lore.kernel.org/r/20230410172718.4067798-1-luiz.dentz@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agonet: dsa: mv88e6xxx: Correct cmode to PHY_INTERFACE_
Andrew Lunn [Tue, 11 Apr 2023 02:35:41 +0000 (04:35 +0200)]
net: dsa: mv88e6xxx: Correct cmode to PHY_INTERFACE_

The switch can either take the MAC or the PHY role in an MII or RMII
link. There are distinct PHY_INTERFACE_ macros for these two roles.
Correct the mapping so that the `REV` version is used for the PHY
role.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20230411023541.2372609-1-andrew@lunn.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agoRevert "pinctrl: amd: Disable and mask interrupts on resume"
Kornel Dulęba [Tue, 11 Apr 2023 13:49:32 +0000 (13:49 +0000)]
Revert "pinctrl: amd: Disable and mask interrupts on resume"

This reverts commit b26cd9325be4c1fcd331b77f10acb627c560d4d7.

This patch introduces a regression on Lenovo Z13, which can't wake
from the lid with it applied; and some unspecified AMD based Dell
platforms are unable to wake from hitting the power button

Signed-off-by: Kornel Dulęba <korneld@chromium.org>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20230411134932.292287-1-korneld@chromium.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
19 months agotreewide: Fix probing of devices in DT overlays
Geert Uytterhoeven [Thu, 30 Mar 2023 13:26:13 +0000 (15:26 +0200)]
treewide: Fix probing of devices in DT overlays

When loading a DT overlay that creates a device, the device is not
probed, unless the DT overlay is unloaded and reloaded again.

After the recent refactoring to improve fw_devlink, it no longer depends
on the "compatible" property to identify which device tree nodes will
become struct devices.   fw_devlink now picks up dangling consumers
(consumers pointing to descendent device tree nodes of a device that
aren't converted to child devices) when a device is successfully bound
to a driver.  See __fw_devlink_pickup_dangling_consumers().

However, during DT overlay, a device's device tree node can have
sub-nodes added/removed without unbinding/rebinding the driver.  This
difference in behavior between the normal device instantiation and
probing flow vs. the DT overlay flow has a bunch of implications that
are pointed out elsewhere[1].  One of them is that the fw_devlink logic
to pick up dangling consumers is never exercised.

This patch solves the fw_devlink issue by marking all DT nodes added by
DT overlays with FWNODE_FLAG_NOT_DEVICE (fwnode that won't become
device), and by clearing the flag when a struct device is actually
created for the DT node.  This way, fw_devlink knows not to have
consumers waiting on these newly added DT nodes, and to propagate the
dependency to an ancestor DT node that has the corresponding struct
device.

Based on a patch by Saravana Kannan, which covered only platform and spi
devices.

[1] https://lore.kernel.org/r/CAGETcx_bkuFaLCiPrAWCPQz+w79ccDp6=9e881qmK=vx3hBMyg@mail.gmail.com

Fixes: 4a032827daa89350 ("of: property: Simplify of_link_to_phandle()")
Link: https://lore.kernel.org/r/CAGETcx_+rhHvaC_HJXGrr5_WAd2+k5f=rWYnkCZ6z5bGX-wj4w@mail.gmail.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Wolfram Sang <wsa@kernel.org> # for I2C
Acked-by: Shawn Guo <shawnguo@kernel.org>
Acked-by: Saravana Kannan <saravanak@google.com>
Tested-by: Ivan Bornyakov <i.bornyakov@metrotek.ru>
Link: https://lore.kernel.org/r/e1fa546682ea4c8474ff997ab6244c5e11b6f8bc.1680182615.git.geert+renesas@glider.be
Signed-off-by: Rob Herring <robh@kernel.org>
19 months agodt-bindings: interrupt-controller: loongarch: Fix mismatched compatible
Liu Peibao [Sat, 1 Apr 2023 09:13:04 +0000 (17:13 +0800)]
dt-bindings: interrupt-controller: loongarch: Fix mismatched compatible

The "compatible" doesn't match what the kernel is using. Fix it as
kernel using.

Fixes: 6b2748ada244 ("dt-bindings: interrupt-controller: add yaml for LoongArch CPU interrupt controller")
Reported-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/all/20221208020954.GA3368836-robh@kernel.org/
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Liu Peibao <liupeibao@loongson.cn>
Link: https://lore.kernel.org/r/20230401091304.12633-1-liupeibao@loongson.cn
[robh: Rename file to match compatible, fix subject typo]
Signed-off-by: Rob Herring <robh@kernel.org>
19 months agoMerge tag 'pci-v6.3-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Linus Torvalds [Tue, 11 Apr 2023 18:59:49 +0000 (11:59 -0700)]
Merge tag 'pci-v6.3-fixes-2' of git://git./linux/kernel/git/pci/pci

Pull pci fixes from Bjorn Helgaas:

 - Provide pci_msix_can_alloc_dyn() stub when CONFIG_PCI_MSI unset to
   avoid build errors (Reinette Chatre)

 - Quirk AMD XHCI controller that loses MSI-X state in D3hot to avoid
   broken USB after hotplug or suspend/resume (Basavaraj Natikar)

 - Fix use-after-free in pci_bus_release_domain_nr() (Rob Herring)

* tag 'pci-v6.3-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
  PCI: Fix use-after-free in pci_bus_release_domain_nr()
  x86/PCI: Add quirk for AMD XHCI controller that loses MSI-X state in D3hot
  PCI/MSI: Provide missing stub for pci_msix_can_alloc_dyn()

19 months agoMerge tag 'for-6.3-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
Linus Torvalds [Tue, 11 Apr 2023 18:43:16 +0000 (11:43 -0700)]
Merge tag 'for-6.3-rc6-tag' of git://git./linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:

 - fix fast checksum detection, this affects filesystems with non-crc32c
   checksum, calculation would not be offloaded to worker threads

 - restore thread_pool mount option behaviour for endio workers, the new
   value for maximum active threads would not be set to the actual work
   queues

* tag 'for-6.3-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: fix fast csum implementation detection
  btrfs: restore the thread_pool= behavior in remount for the end I/O workqueues

19 months agoselftests/bpf: Add test to access u32 ptr argument in tracing program
Feng Zhou [Mon, 10 Apr 2023 08:59:08 +0000 (16:59 +0800)]
selftests/bpf: Add test to access u32 ptr argument in tracing program

Adding verifier test for accessing u32 pointer argument in
tracing programs.

The test program loads 1nd argument of bpf_fentry_test9 function
which is u32 pointer and checks that verifier allows that.

Co-developed-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Feng Zhou <zhoufeng.zf@bytedance.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/bpf/20230410085908.98493-3-zhoufeng.zf@bytedance.com
19 months agodrm/armada: Fix a potential double free in an error handling path
Christophe JAILLET [Sun, 26 Dec 2021 16:34:16 +0000 (17:34 +0100)]
drm/armada: Fix a potential double free in an error handling path

'priv' is a managed resource, so there is no need to free it explicitly or
there will be a double free().

Fixes: 90ad200b4cbc ("drm/armada: Use devm_drm_dev_alloc")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/c4f3c9207a9fce35cb6dd2cc60e755275961588a.1640536364.git.christophe.jaillet@wanadoo.fr
19 months agobpf/btf: Fix is_int_ptr()
Feng Zhou [Mon, 10 Apr 2023 08:59:07 +0000 (16:59 +0800)]
bpf/btf: Fix is_int_ptr()

When tracing a kernel function with arg type is u32*, btf_ctx_access()
would report error: arg2 type INT is not a struct.

The commit bb6728d75611 ("bpf: Allow access to int pointer arguments
in tracing programs") added support for int pointer, but did not skip
modifiers before checking it's type. This patch fixes it.

Fixes: bb6728d75611 ("bpf: Allow access to int pointer arguments in tracing programs")
Co-developed-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Feng Zhou <zhoufeng.zf@bytedance.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/bpf/20230410085908.98493-2-zhoufeng.zf@bytedance.com
19 months agoMerge tag 'mtd/fixes-for-6.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Tue, 11 Apr 2023 17:09:29 +0000 (10:09 -0700)]
Merge tag 'mtd/fixes-for-6.3-rc7' of git://git./linux/kernel/git/mtd/linux

Pull mtd fixes from Miquel Raynal:
 "Core fix:

   - mtdblock: Tolerate corrected bit-flips

  Raw NAND fixes:

   - meson: Fix bitmask for length in command word

   - stm32_fmc2:

       - Remove unsupported EDO mode

       - Use timings.mode instead of checking tRC_min.

         The first patch is the real fix but nowadays we use
         timings.mode instead of bare timings, so in order to ease the
         backports, the fix was split into two steps, the first one easy
         to backport on older kernels, the second one just as a
         follow-up so recent stable kernels would look like the
         mainline"

* tag 'mtd/fixes-for-6.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
  mtd: rawnand: meson: fix bitmask for length in command word
  mtdblock: tolerate corrected bit-flips
  mtd: rawnand: stm32_fmc2: use timings.mode instead of checking tRC_min
  mtd: rawnand: stm32_fmc2: remove unsupported EDO mode

19 months agoMerge tag 'ata-6.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal...
Linus Torvalds [Tue, 11 Apr 2023 16:51:45 +0000 (09:51 -0700)]
Merge tag 'ata-6.3-rc7' of git://git./linux/kernel/git/dlemoal/libata

Pull ata fix from Damien Le Moal:

 - Update my email address in the MAINTAINERS file

* tag 'ata-6.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata:
  MAINTAINERS: Change ata maintainer email addresses

19 months agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Tue, 11 Apr 2023 16:36:42 +0000 (09:36 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "Two ARM fixes:

   - Ensure the guest PMU context is restored before the first KVM_RUN,
     fixing an issue where EL0 event counting is broken after vCPU
     save/restore

   - Actually initialize ID_AA64PFR0_EL1.{CSV2,CSV3} based on the
     sanitized, system-wide values for protected VMs"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: arm64: Advertise ID_AA64PFR0_EL1.CSV2/3 to protected VMs
  KVM: arm64: PMU: Restore the guest's EL0 event counting after migration

19 months agoMerge branch 'bpf-verifier-log-rotation'
Daniel Borkmann [Tue, 11 Apr 2023 16:05:44 +0000 (18:05 +0200)]
Merge branch 'bpf-verifier-log-rotation'

Andrii Nakryiko says:

====================
This patch set changes BPF verifier log behavior to behave as a rotating log,
by default. If user-supplied log buffer is big enough to contain entire
verifier log output, there is no effective difference. But where previously
user supplied too small log buffer and would get -ENOSPC error result and the
beginning part of the verifier log, now there will be no error and user will
get ending part of verifier log filling up user-supplied log buffer.  Which
is, in absolute majority of cases, is exactly what's useful, relevant, and
what users want and need, as the ending of the verifier log is containing
details of verifier failure and relevant state that got us to that failure.
So this rotating mode is made default, but for some niche advanced debugging
scenarios it's possible to request old behavior by specifying additional
BPF_LOG_FIXED (8) flag.

This patch set adjusts libbpf to allow specifying flags beyond 1 | 2 | 4. We
also add --log-size and --log-fixed options to veristat to be able to both
test this functionality manually, but also to be used in various debugging
scenarios. We also add selftests that tries many variants of log buffer size
to stress-test correctness of internal verifier log bookkeeping code.

Further, this patch set is merged with log_size_actual v1 patchset ([0]),
which adds ability to get required log buffer size to fit entire verifier
log output.

This addresses a long-standing limitation, which causes users and BPF loader
library writers to guess and pre-size log buffer, often allocating unnecessary
extra memory for this or doing extra program verifications just to size logs
better, ultimately wasting resources. This was requested most recently by Go
BPF library maintainers ([1]).

See respective patches for details. A bunch of them some drive-by fixes
detecting during working with the code. Some other further refactor and
compratmentalize verifier log handling code into kernel/bpf/log.c, which
should also make it simpler to integrate such verbose log for other
complicated bpf() syscall commands, if necessary. The rest are actual logic
to calculate maximum log buffer size needed and return it to user-space.
Few patches wire this on libbpf side, and the rest add selftests to test
proper log truncation and log_buf==NULL handling.

This turned into a pretty sizable patch set with lots of arithmetics, but
hopefully the set of features added to verifier log in this patch set are
both useful for BPF users and are self-contained and isolated enough to not
cause troubles going forward.

v3->v4:
  - s/log_size_actual/log_true_size/ (Alexei);
  - log_buf==NULL && log_size==0 don't trigger -ENOSPC (Lorenz);
  - added WARN_ON_ONCE if we try bpf_vlog_reset() forward (Lorenz);
  - added selftests for truncation in BPF_LOG_FIXED mode;
  - fixed edge case in BPF_LOG_FIXED when log_size==1, leaving buf not zero
    terminated;
v2->v3:
  - typos and comment improvement (Lorenz);
  - merged with log_size_actual v1 ([0]) patch set (Alexei);
  - added log_buf==NULL condition allowed (Lorenz);
  - added BPF_BTF_LOAD logs tests (Lorenz);
  - more clean up and refactoring of internal verifier log API;
v1->v2:
  - return -ENOSPC even in rotating log mode for preserving backwards
    compatibility (Lorenz);

  [0] https://patchwork.kernel.org/project/netdevbpf/list/?series=735213&state=*
  [1] https://lore.kernel.org/bpf/CAN+4W8iNoEbQzQVbB_o1W0MWBDV4xCJAq7K3f6psVE-kkCfMqg@mail.gmail.com/
====================

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
19 months agoselftests/bpf: Add verifier log tests for BPF_BTF_LOAD command
Andrii Nakryiko [Thu, 6 Apr 2023 23:42:05 +0000 (16:42 -0700)]
selftests/bpf: Add verifier log tests for BPF_BTF_LOAD command

Add verifier log tests for BPF_BTF_LOAD command, which are very similar,
conceptually, to BPF_PROG_LOAD tests. These are two separate commands
dealing with verbose verifier log, so should be both tested separately.

Test that log_buf==NULL condition *does not* return -ENOSPC.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-20-andrii@kernel.org
19 months agoselftests/bpf: Add testing of log_buf==NULL condition for BPF_PROG_LOAD
Andrii Nakryiko [Thu, 6 Apr 2023 23:42:04 +0000 (16:42 -0700)]
selftests/bpf: Add testing of log_buf==NULL condition for BPF_PROG_LOAD

Add few extra test conditions to validate that it's ok to pass
log_buf==NULL and log_size==0 to BPF_PROG_LOAD command with the intent
to get log_true_size without providing a buffer.

Test that log_buf==NULL condition *does not* return -ENOSPC.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-19-andrii@kernel.org
19 months agoselftests/bpf: Add tests to validate log_true_size feature
Andrii Nakryiko [Thu, 6 Apr 2023 23:42:03 +0000 (16:42 -0700)]
selftests/bpf: Add tests to validate log_true_size feature

Add additional test cases validating that log_true_size is consistent
between fixed and rotating log modes, and that log_true_size can be
used *exactly* without causing -ENOSPC, while using just 1 byte shorter
log buffer would cause -ENOSPC.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-18-andrii@kernel.org
19 months agolibbpf: Wire through log_true_size for bpf_btf_load() API
Andrii Nakryiko [Thu, 6 Apr 2023 23:42:02 +0000 (16:42 -0700)]
libbpf: Wire through log_true_size for bpf_btf_load() API

Similar to what we did for bpf_prog_load() in previous patch, wire
returning of log_true_size value from kernel back to the user through
OPTS out field.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230406234205.323208-17-andrii@kernel.org
19 months agolibbpf: Wire through log_true_size returned from kernel for BPF_PROG_LOAD
Andrii Nakryiko [Thu, 6 Apr 2023 23:42:01 +0000 (16:42 -0700)]
libbpf: Wire through log_true_size returned from kernel for BPF_PROG_LOAD

Add output-only log_true_size field to bpf_prog_load_opts to return
bpf_attr->log_true_size value back from bpf() syscall.

Note, that we have to drop const modifier from opts in bpf_prog_load().
This could potentially cause compilation error for some users. But
the usual practice is to define bpf_prog_load_ops
as a local variable next to bpf_prog_load() call and pass pointer to it,
so const vs non-const makes no difference and won't even come up in most
(if not all) cases.

There are no runtime and ABI backwards/forward compatibility issues at all.
If user provides old struct bpf_prog_load_opts, libbpf won't set new
fields. If old libbpf is provided new bpf_prog_load_opts, nothing will
happen either as old libbpf doesn't yet know about this new field.

Adding a new variant of bpf_prog_load() just for this seems like a big
and unnecessary overkill. As a corroborating evidence is the fact that
entire selftests/bpf code base required not adjustment whatsoever.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230406234205.323208-16-andrii@kernel.org
19 months agobpf: Relax log_buf NULL conditions when log_level>0 is requested
Andrii Nakryiko [Thu, 6 Apr 2023 23:42:00 +0000 (16:42 -0700)]
bpf: Relax log_buf NULL conditions when log_level>0 is requested

Drop the log_size>0 and log_buf!=NULL condition when log_level>0. This
allows users to request log_true_size of a full log without providing
actual (even if small) log buffer. Verifier log handling code was mostly
ready to handle NULL log->ubuf, so only few small changes were necessary
to prevent NULL log->ubuf from causing problems.

Note, that if user provided NULL log_buf with log_level>0 we don't
consider this a log truncation, and thus won't return -ENOSPC.

We also enforce that either (log_buf==NULL && log_size==0) or
(log_buf!=NULL && log_size>0).

Suggested-by: Lorenz Bauer <lmb@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-15-andrii@kernel.org
19 months agobpf: Simplify internal verifier log interface
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:59 +0000 (16:41 -0700)]
bpf: Simplify internal verifier log interface

Simplify internal verifier log API down to bpf_vlog_init() and
bpf_vlog_finalize(). The former handles input arguments validation in
one place and makes it easier to change it. The latter subsumes -ENOSPC
(truncation) and -EFAULT handling and simplifies both caller's code
(bpf_check() and btf_parse()).

For btf_parse(), this patch also makes sure that verifier log
finalization happens even if there is some error condition during BTF
verification process prior to normal finalization step.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-14-andrii@kernel.org
19 months agobpf: Add log_true_size output field to return necessary log buffer size
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:58 +0000 (16:41 -0700)]
bpf: Add log_true_size output field to return necessary log buffer size

Add output-only log_true_size and btf_log_true_size field to
BPF_PROG_LOAD and BPF_BTF_LOAD commands, respectively. It will return
the size of log buffer necessary to fit in all the log contents at
specified log_level. This is very useful for BPF loader libraries like
libbpf to be able to size log buffer correctly, but could be used by
users directly, if necessary, as well.

This patch plumbs all this through the code, taking into account actual
bpf_attr size provided by user to determine if these new fields are
expected by users. And if they are, set them from kernel on return.

We refactory btf_parse() function to accommodate this, moving attr and
uattr handling inside it. The rest is very straightforward code, which
is split from the logging accounting changes in the previous patch to
make it simpler to review logic vs UAPI changes.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-13-andrii@kernel.org
19 months agobpf: Keep track of total log content size in both fixed and rolling modes
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:57 +0000 (16:41 -0700)]
bpf: Keep track of total log content size in both fixed and rolling modes

Change how we do accounting in BPF_LOG_FIXED mode and adopt log->end_pos
as *logical* log position. This means that we can go beyond physical log
buffer size now and be able to tell what log buffer size should be to
fit entire log contents without -ENOSPC.

To do this for BPF_LOG_FIXED mode, we need to remove a short-circuiting
logic of not vsnprintf()'ing further log content once we filled up
user-provided buffer, which is done by bpf_verifier_log_needed() checks.
We modify these checks to always keep going if log->level is non-zero
(i.e., log is requested), even if log->ubuf was NULL'ed out due to
copying data to user-space, or if entire log buffer is physically full.
We adopt bpf_verifier_vlog() routine to work correctly with
log->ubuf == NULL condition, performing log formatting into temporary
kernel buffer, doing all the necessary accounting, but just avoiding
copying data out if buffer is full or NULL'ed out.

With these changes, it's now possible to do this sort of determination of
log contents size in both BPF_LOG_FIXED and default rolling log mode.
We need to keep in mind bpf_vlog_reset(), though, which shrinks log
contents after successful verification of a particular code path. This
log reset means that log->end_pos isn't always increasing, so to return
back to users what should be the log buffer size to fit all log content
without causing -ENOSPC even in the presence of log resetting, we need
to keep maximum over "lifetime" of logging. We do this accounting in
bpf_vlog_update_len_max() helper.

A related and subtle aspect is that with this logical log->end_pos even in
BPF_LOG_FIXED mode we could temporary "overflow" buffer, but then reset
it back with bpf_vlog_reset() to a position inside user-supplied
log_buf. In such situation we still want to properly maintain
terminating zero. We will eventually return -ENOSPC even if final log
buffer is small (we detect this through log->len_max check). This
behavior is simpler to reason about and is consistent with current
behavior of verifier log. Handling of this required a small addition to
bpf_vlog_reset() logic to avoid doing put_user() beyond physical log
buffer dimensions.

Another issue to keep in mind is that we limit log buffer size to 32-bit
value and keep such log length as u32, but theoretically verifier could
produce huge log stretching beyond 4GB. Instead of keeping (and later
returning) 64-bit log length, we cap it at UINT_MAX. Current UAPI makes
it impossible to specify log buffer size bigger than 4GB anyways, so we
don't really loose anything here and keep everything consistently 32-bit
in UAPI. This property will be utilized in next patch.

Doing the same determination of maximum log buffer for rolling mode is
trivial, as log->end_pos and log->start_pos are already logical
positions, so there is nothing new there.

These changes do incidentally fix one small issue with previous logging
logic. Previously, if use provided log buffer of size N, and actual log
output was exactly N-1 bytes + terminating \0, kernel logic coun't
distinguish this condition from log truncation scenario which would end
up with truncated log contents of N-1 bytes + terminating \0 as well.

But now with log->end_pos being logical position that could go beyond
actual log buffer size, we can distinguish these two conditions, which
we do in this patch. This plays nicely with returning log_size_actual
(implemented in UAPI in the next patch), as we can now guarantee that if
user takes such log_size_actual and provides log buffer of that exact
size, they will not get -ENOSPC in return.

All in all, all these changes do conceptually unify fixed and rolling
log modes much better, and allow a nice feature requested by users:
knowing what should be the size of the buffer to avoid -ENOSPC.

We'll plumb this through the UAPI and the code in the next patch.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-12-andrii@kernel.org
19 months agobpf: Simplify logging-related error conditions handling
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:56 +0000 (16:41 -0700)]
bpf: Simplify logging-related error conditions handling

Move log->level == 0 check into bpf_vlog_truncated() instead of doing it
explicitly. Also remove unnecessary goto in kernel/bpf/verifier.c.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-11-andrii@kernel.org
19 months agobpf: Avoid incorrect -EFAULT error in BPF_LOG_KERNEL mode
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:55 +0000 (16:41 -0700)]
bpf: Avoid incorrect -EFAULT error in BPF_LOG_KERNEL mode

If verifier log is in BPF_LOG_KERNEL mode, no log->ubuf is expected and
it stays NULL throughout entire verification process. Don't erroneously
return -EFAULT in such case.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-10-andrii@kernel.org
19 months agobpf: Fix missing -EFAULT return on user log buf error in btf_parse()
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:54 +0000 (16:41 -0700)]
bpf: Fix missing -EFAULT return on user log buf error in btf_parse()

btf_parse() is missing -EFAULT error return if log->ubuf was NULL-ed out
due to error while copying data into user-provided buffer. Add it, but
handle a special case of BPF_LOG_KERNEL in which log->ubuf is always NULL.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-9-andrii@kernel.org
19 months agobpf: Ignore verifier log reset in BPF_LOG_KERNEL mode
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:53 +0000 (16:41 -0700)]
bpf: Ignore verifier log reset in BPF_LOG_KERNEL mode

Verifier log position reset is meaningless in BPF_LOG_KERNEL mode, so
just exit early in bpf_vlog_reset() if log->level is BPF_LOG_KERNEL.

This avoid meaningless put_user() into NULL log->ubuf.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-8-andrii@kernel.org
19 months agoselftests/bpf: Add fixed vs rotating verifier log tests
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:52 +0000 (16:41 -0700)]
selftests/bpf: Add fixed vs rotating verifier log tests

Add selftests validating BPF_LOG_FIXED behavior, which used to be the
only behavior, and now default rotating BPF verifier log, which returns
just up to last N bytes of full verifier log, instead of returning
-ENOSPC.

To stress test correctness of in-kernel verifier log logic, we force it
to truncate program's verifier log to all lengths from 1 all the way to
its full size (about 450 bytes today). This was a useful stress test
while developing the feature.

For both fixed and rotating log modes we expect -ENOSPC if log contents
doesn't fit in user-supplied log buffer.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-7-andrii@kernel.org
19 months agoveristat: Add more veristat control over verifier log options
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:51 +0000 (16:41 -0700)]
veristat: Add more veristat control over verifier log options

Add --log-size to be able to customize log buffer sent to bpf() syscall
for BPF program verification logging.

Add --log-fixed to enforce BPF_LOG_FIXED behavior for BPF verifier log.
This is useful in unlikely event that beginning of truncated verifier
log is more important than the end of it (which with rotating verifier
log behavior is the default now).

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230406234205.323208-6-andrii@kernel.org
19 months agolibbpf: Don't enforce unnecessary verifier log restrictions on libbpf side
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:50 +0000 (16:41 -0700)]
libbpf: Don't enforce unnecessary verifier log restrictions on libbpf side

This basically prevents any forward compatibility. And we either way
just return -EINVAL, which would otherwise be returned from bpf()
syscall anyways.

Similarly, drop enforcement of non-NULL log_buf when log_level > 0. This
won't be true anymore soon.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-5-andrii@kernel.org
19 months agobpf: Switch BPF verifier log to be a rotating log by default
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:49 +0000 (16:41 -0700)]
bpf: Switch BPF verifier log to be a rotating log by default

Currently, if user-supplied log buffer to collect BPF verifier log turns
out to be too small to contain full log, bpf() syscall returns -ENOSPC,
fails BPF program verification/load, and preserves first N-1 bytes of
the verifier log (where N is the size of user-supplied buffer).

This is problematic in a bunch of common scenarios, especially when
working with real-world BPF programs that tend to be pretty complex as
far as verification goes and require big log buffers. Typically, it's
when debugging tricky cases at log level 2 (verbose). Also, when BPF program
is successfully validated, log level 2 is the only way to actually see
verifier state progression and all the important details.

Even with log level 1, it's possible to get -ENOSPC even if the final
verifier log fits in log buffer, if there is a code path that's deep
enough to fill up entire log, even if normally it would be reset later
on (there is a logic to chop off successfully validated portions of BPF
verifier log).

In short, it's not always possible to pre-size log buffer. Also, what's
worse, in practice, the end of the log most often is way more important
than the beginning, but verifier stops emitting log as soon as initial
log buffer is filled up.

This patch switches BPF verifier log behavior to effectively behave as
rotating log. That is, if user-supplied log buffer turns out to be too
short, verifier will keep overwriting previously written log,
effectively treating user's log buffer as a ring buffer. -ENOSPC is
still going to be returned at the end, to notify user that log contents
was truncated, but the important last N bytes of the log would be
returned, which might be all that user really needs. This consistent
-ENOSPC behavior, regardless of rotating or fixed log behavior, allows
to prevent backwards compatibility breakage. The only user-visible
change is which portion of verifier log user ends up seeing *if buffer
is too small*. Given contents of verifier log itself is not an ABI,
there is no breakage due to this behavior change. Specialized tools that
rely on specific contents of verifier log in -ENOSPC scenario are
expected to be easily adapted to accommodate old and new behaviors.

Importantly, though, to preserve good user experience and not require
every user-space application to adopt to this new behavior, before
exiting to user-space verifier will rotate log (in place) to make it
start at the very beginning of user buffer as a continuous
zero-terminated string. The contents will be a chopped off N-1 last
bytes of full verifier log, of course.

Given beginning of log is sometimes important as well, we add
BPF_LOG_FIXED (which equals 8) flag to force old behavior, which allows
tools like veristat to request first part of verifier log, if necessary.
BPF_LOG_FIXED flag is also a simple and straightforward way to check if
BPF verifier supports rotating behavior.

On the implementation side, conceptually, it's all simple. We maintain
64-bit logical start and end positions. If we need to truncate the log,
start position will be adjusted accordingly to lag end position by
N bytes. We then use those logical positions to calculate their matching
actual positions in user buffer and handle wrap around the end of the
buffer properly. Finally, right before returning from bpf_check(), we
rotate user log buffer contents in-place as necessary, to make log
contents contiguous. See comments in relevant functions for details.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-4-andrii@kernel.org
19 months agobpf: Remove minimum size restrictions on verifier log buffer
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:48 +0000 (16:41 -0700)]
bpf: Remove minimum size restrictions on verifier log buffer

It's not clear why we have 128 as minimum size, but it makes testing
harder and seems unnecessary, as we carefully handle truncation
scenarios and use proper snprintf variants. So remove this limitation
and just enforce positive length for log buffer.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-3-andrii@kernel.org
19 months agobpf: Split off basic BPF verifier log into separate file
Andrii Nakryiko [Thu, 6 Apr 2023 23:41:47 +0000 (16:41 -0700)]
bpf: Split off basic BPF verifier log into separate file

kernel/bpf/verifier.c file is large and growing larger all the time. So
it's good to start splitting off more or less self-contained parts into
separate files to keep source code size (somewhat) somewhat under
control.

This patch is a one step in this direction, moving some of BPF verifier log
routines into a separate kernel/bpf/log.c. Right now it's most low-level
and isolated routines to append data to log, reset log to previous
position, etc. Eventually we could probably move verifier state
printing logic here as well, but this patch doesn't attempt to do that
yet.

Subsequent patches will add more logic to verifier log management, so
having basics in a separate file will make sure verifier.c doesn't grow
more with new changes.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/bpf/20230406234205.323208-2-andrii@kernel.org
19 months agobpf: Remove extra whitespace in SPDX tag for syscall/helpers man pages
Alejandro Colomar [Tue, 11 Apr 2023 14:47:47 +0000 (15:47 +0100)]
bpf: Remove extra whitespace in SPDX tag for syscall/helpers man pages

There is an extra whitespace in the SPDX tag, before the license name,
in the script for generating man pages for the bpf() syscall and the
helpers. It has caused problems in Debian packaging, in the tool that
autodetects licenses. Let's clean it up.

Fixes: 5cb62b7598f2 ("bpf, docs: Use SPDX license identifier in bpf_doc.py")
Signed-off-by: Alejandro Colomar <alx@kernel.org>
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230411144747.66734-1-quentin@isovalent.com
19 months agofbmem: Reject FB_ACTIVATE_KD_TEXT from userspace
Daniel Vetter [Tue, 4 Apr 2023 19:39:34 +0000 (21:39 +0200)]
fbmem: Reject FB_ACTIVATE_KD_TEXT from userspace

This is an oversight from dc5bdb68b5b3 ("drm/fb-helper: Fix vt
restore") - I failed to realize that nasty userspace could set this.

It's not pretty to mix up kernel-internal and userspace uapi flags
like this, but since the entire fb_var_screeninfo structure is uapi
we'd need to either add a new parameter to the ->fb_set_par callback
and fb_set_par() function, which has a _lot_ of users. Or some other
fairly ugly side-channel int fb_info. Neither is a pretty prospect.

Instead just correct the issue at hand by filtering out this
kernel-internal flag in the ioctl handling code.

Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Fixes: dc5bdb68b5b3 ("drm/fb-helper: Fix vt restore")
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: shlomo@fastmail.com
Cc: Michel Dänzer <michel@daenzer.net>
Cc: Noralf Trønnes <noralf@tronnes.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v5.7+
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Nathan Chancellor <natechancellor@gmail.com>
Cc: Qiujun Huang <hqjagain@gmail.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: linux-fbdev@vger.kernel.org
Cc: Helge Deller <deller@gmx.de>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Shigeru Yoshida <syoshida@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230404193934.472457-1-daniel.vetter@ffwll.ch
19 months agogve: Unify duplicate GQ min pkt desc size constants
Shailend Chand [Fri, 7 Apr 2023 18:48:30 +0000 (11:48 -0700)]
gve: Unify duplicate GQ min pkt desc size constants

The two constants accomplish the same thing.

Signed-off-by: Shailend Chand <shailend@google.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230407184830.309398-1-shailend@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agotools: ynl: throw a more meaningful exception if family not supported
Jakub Kicinski [Fri, 7 Apr 2023 14:56:09 +0000 (07:56 -0700)]
tools: ynl: throw a more meaningful exception if family not supported

cli.py currently throws a pure KeyError if kernel doesn't support
a netlink family. Users who did not write ynl (hah) may waste
their time investigating what's wrong with the Python code.
Improve the error message:

Traceback (most recent call last):
  File "/home/kicinski/devel/linux/tools/net/ynl/lib/ynl.py", line 362, in __init__
    self.family = GenlFamily(self.yaml['name'])
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/kicinski/devel/linux/tools/net/ynl/lib/ynl.py", line 331, in __init__
    self.genl_family = genl_family_name_to_id[family_name]
                       ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
KeyError: 'netdev'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/kicinski/devel/linux/./tools/net/ynl/cli.py", line 52, in <module>
    main()
  File "/home/kicinski/devel/linux/./tools/net/ynl/cli.py", line 31, in main
    ynl = YnlFamily(args.spec, args.schema)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/kicinski/devel/linux/tools/net/ynl/lib/ynl.py", line 364, in __init__
    raise Exception(f"Family '{self.yaml['name']}' not supported by the kernel")
Exception: Family 'netdev' not supported by the kernel

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230407145609.297525-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agonet: phy: nxp-c45-tja11xx: add remove callback
Radu Pirea (OSS) [Thu, 6 Apr 2023 09:59:04 +0000 (12:59 +0300)]
net: phy: nxp-c45-tja11xx: add remove callback

Unregister PTP clock when the driver is removed.
Purge the RX and TX skb queues.

Fixes: 514def5dd339 ("phy: nxp-c45-tja11xx: add timestamping support")
CC: stable@vger.kernel.org # 5.15+
Signed-off-by: Radu Pirea (OSS) <radu-nicolae.pirea@oss.nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230406095904.75456-1-radu-nicolae.pirea@oss.nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agonet: fddi: skfp: rmt: Clean up some inconsistent indenting
Jiapeng Chong [Fri, 7 Apr 2023 03:41:57 +0000 (11:41 +0800)]
net: fddi: skfp: rmt: Clean up some inconsistent indenting

No functional modification involved.

drivers/net/fddi/skfp/rmt.c:236 rmt_fsm() warn: if statement not indented.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4736
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230407034157.61276-1-jiapeng.chong@linux.alibaba.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
19 months agodrm/nouveau/fb: add missing sysmen flush callbacks
Karol Herbst [Wed, 5 Apr 2023 11:04:55 +0000 (13:04 +0200)]
drm/nouveau/fb: add missing sysmen flush callbacks

Closes: https://gitlab.freedesktop.org/drm/nouveau/-/issues/203
Fixes: 5728d064190e1 ("drm/nouveau/fb: handle sysmem flush page from common code")
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230405110455.1368428-1-kherbst@redhat.com
19 months agodrm/i915/dsi: fix DSS CTL register offsets for TGL+
Jani Nikula [Wed, 1 Mar 2023 15:14:09 +0000 (17:14 +0200)]
drm/i915/dsi: fix DSS CTL register offsets for TGL+

On TGL+ the DSS control registers are at different offsets, and there's
one per pipe. Fix the offsets to fix dual link DSI for TGL+.

There would be helpers for this in the DSC code, but just do the quick
fix now for DSI. Long term, we should probably move all the DSS handling
into intel_vdsc.c, so exporting the helpers seems counter-productive.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8232
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230301151409.1581574-1-jani.nikula@intel.com
(cherry picked from commit 1a62dd9895dca78bee28bba3a36f08836fdd143d)

19 months agoMAINTAINERS: Change ata maintainer email addresses
Damien Le Moal [Mon, 10 Apr 2023 02:31:11 +0000 (11:31 +0900)]
MAINTAINERS: Change ata maintainer email addresses

Change my email address referenced in the MAINTAINERS file for the ata
subsystem to dlemoal@kernel.org. And while at it, also change other
references for zonefs and the k210 drivers to the same address.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
19 months agonet: ethernet: mtk_eth_soc: use be32 type to store be32 values
Simon Horman [Fri, 7 Apr 2023 13:26:51 +0000 (15:26 +0200)]
net: ethernet: mtk_eth_soc: use be32 type to store be32 values

n_addr is used to store be32 values,
so a sparse-friendly array of be32 to store these values.

Flagged by sparse:
  .../mtk_ppe_debugfs.c:59:27: warning: incorrect type in assignment (different base types)
  .../mtk_ppe_debugfs.c:59:27:    expected unsigned int
  .../mtk_ppe_debugfs.c:59:27:    got restricted __be32 [usertype]
  .../mtk_ppe_debugfs.c:161:46: warning: cast to restricted __be16

No functional changes intended.
Compile tested only.

Signed-off-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230401-mtk_eth_soc-sparse-v2-1-963becba3cb7@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agoMerge branch 'net-lockless-stop-wake-combo-macros'
Jakub Kicinski [Tue, 11 Apr 2023 00:56:20 +0000 (17:56 -0700)]
Merge branch 'net-lockless-stop-wake-combo-macros'

Jakub Kicinski says:

====================
net: lockless stop/wake combo macros

A lot of drivers follow the same scheme to stop / start queues
without introducing locks between xmit and NAPI tx completions.
I'm guessing they all copy'n'paste each other's code.
The original code dates back all the way to e1000 and Linux 2.6.19.

v3: https://lore.kernel.org/all/20230405223134.94665-1-kuba@kernel.org/
v2: https://lore.kernel.org/all/20230401051221.3160913-2-kuba@kernel.org/
v1: https://lore.kernel.org/all/20230322233028.269410-1-kuba@kernel.org/
rfc: https://lore.kernel.org/all/20230311050130.115138-1-kuba@kernel.org/
====================

Link: https://lore.kernel.org/r/20230407012536.273382-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agonet: piggy back on the memory barrier in bql when waking queues
Jakub Kicinski [Fri, 7 Apr 2023 01:25:36 +0000 (18:25 -0700)]
net: piggy back on the memory barrier in bql when waking queues

Drivers call netdev_tx_completed_queue() right before
netif_txq_maybe_wake(). If BQL is enabled netdev_tx_completed_queue()
should issue a memory barrier, so we can depend on that separating
the stop check from the consumer index update, instead of adding
another barrier in netif_txq_maybe_wake().

This matters more than the barriers on the xmit path, because
the wake condition is almost always true. So we issue the
consumer side barrier often.

Wrap netdev_tx_completed_queue() in a local helper to issue
the barrier even if BQL is disabled. Keep the same semantics
as netdev_tx_completed_queue() (barrier only if bytes != 0)
to make it clear that the barrier is conditional.

Plus since macro gets pkt/byte counts as arguments now -
we can skip waking if there were no packets completed.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agobnxt: use new queue try_stop/try_wake macros
Jakub Kicinski [Fri, 7 Apr 2023 01:25:35 +0000 (18:25 -0700)]
bnxt: use new queue try_stop/try_wake macros

Convert bnxt to use new macros rather than open code the logic.
Two differences:
(1) bnxt_tx_int() will now only issue a memory barrier if it sees
    enough space on the ring to wake the queue. This should be fine,
    the mb() is between the writes to the ring pointers and checking
    queue state.
(2) we'll start the queue instead of waking on race, this should
    be safe inside the xmit handler.

Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agoixgbe: use new queue try_stop/try_wake macros
Jakub Kicinski [Fri, 7 Apr 2023 01:25:34 +0000 (18:25 -0700)]
ixgbe: use new queue try_stop/try_wake macros

Convert ixgbe to use the new macros, I think a lot of people
copy the ixgbe code. The only functional change is that the
unlikely() in ixgbe_clean_tx_irq() turns into a likely()
inside the new macro and no longer includes

  total_packets && netif_carrier_ok(tx_ring->netdev)

which is probably for the best, anyway.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agonet: provide macros for commonly copied lockless queue stop/wake code
Jakub Kicinski [Fri, 7 Apr 2023 01:25:33 +0000 (18:25 -0700)]
net: provide macros for commonly copied lockless queue stop/wake code

A lot of drivers follow the same scheme to stop / start queues
without introducing locks between xmit and NAPI tx completions.
I'm guessing they all copy'n'paste each other's code.
The original code dates back all the way to e1000 and Linux 2.6.19.

Smaller drivers shy away from the scheme and introduce a lock
which may cause deadlocks in netpoll.

Provide macros which encapsulate the necessary logic.

The macros do not prevent false wake ups, the extra barrier
required to close that race is not worth it. See discussion in:
https://lore.kernel.org/all/c39312a2-4537-14b4-270c-9fe1fbb91e89@gmail.com/

Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 months agodocs: net: use C syntax highlight in driver.rst
Jakub Kicinski [Fri, 7 Apr 2023 01:25:32 +0000 (18:25 -0700)]
docs: net: use C syntax highlight in driver.rst

Use syntax highlight, comment out the "..." since they are
not valid C.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>