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Two user triggerable problems:
- Syzkaller found a way to trigger a WARN_ON and leak memory by racing
destroy with other actions
- There is still a bug in the "batch carry" stuff that gets invoked for
complex cases with accesses and unmapping of huge pages. The test suite
found this (triggers rarely)
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Merge tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd
Pull iommufd fixes from Jason Gunthorpe:
"Two user triggerable problems:
- Syzkaller found a way to trigger a WARN_ON and leak memory by
racing destroy with other actions
- There is still a bug in the "batch carry" stuff that gets invoked
for complex cases with accesses and unmapping of huge pages. The
test suite found this (triggers rarely)"
* tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd:
iommufd: Set end correctly when doing batch carry
iommufd: IOMMUFD_DESTROY should not increase the refcount
target's integrity_recalc()
- Fix locking in DM raid target's raid_ctr() and around call to
md_stop()
- Fix DM cache target's cleaner policy to always allow work to be
queued for writeback; even if cache isn't idle.
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Merge tag 'for-6.5/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- Fix double free on memory allocation failure in DM integrity target's
integrity_recalc()
- Fix locking in DM raid target's raid_ctr() and around call to
md_stop()
- Fix DM cache target's cleaner policy to always allow work to be
queued for writeback; even if cache isn't idle.
* tag 'for-6.5/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm cache policy smq: ensure IO doesn't prevent cleaner policy progress
dm raid: protect md_stop() with 'reconfig_mutex'
dm raid: clean up four equivalent goto tags in raid_ctr()
dm raid: fix missing reconfig_mutex unlock in raid_ctr() error paths
dm integrity: fix double free on memory allocation failure
A collection of device-specific small fixes such as ASoC Realtek
codec fixes for PM issues, ASoC nau8821 quirk additions, and usual
HD- and USB-audio quirks.
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Merge tag 'sound-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of device-specific small fixes such as ASoC Realtek codec
fixes for PM issues, ASoC nau8821 quirk additions, and usual HD- and
USB-audio quirks"
* tag 'sound-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda/realtek: Support ASUS G713PV laptop
ALSA: usb-audio: Update for native DSD support quirks
ALSA: usb-audio: Add quirk for Microsoft Modern Wireless Headset
ALSA: hda/relatek: Enable Mute LED on HP 250 G8
ASoC: atmel: Fix the 8K sample parameter in I2SC master
ASoC: rt711-sdca: fix for JD event handling in ClockStop Mode0
ASoC: rt711: fix for JD event handling in ClockStop Mode0
ASoC: rt722-sdca: fix for JD event handling in ClockStop Mode0
ASoC: rt712-sdca: fix for JD event handling in ClockStop Mode0
ASoc: codecs: ES8316: Fix DMIC config
ASoC: rt5682-sdw: fix for JD event handling in ClockStop Mode0
ASoC: wm8904: Fill the cache for WM8904_ADC_TEST_0 register
ASoC: nau8821: Add DMI quirk mechanism for active-high jack-detect
ASoC: da7219: Check for failure reading AAD IRQ events
ASoC: da7219: Flush pending AAD IRQ when suspending
ALSA: seq: remove redundant unsigned comparison to zero
ASoC: fsl_spdif: Silence output on stop
fbdev:
- remove unused function
amdgpu:
- gfxhub partition fix
- Fix error handling in psp_sw_init()
- SMU13 fix
- DCN 3.1 fix
- DCN 3.2 fix
- Fix for display PHY programming sequence
- DP MST error handling fix
- GFX 9.4.3 fix
amdkfd:
- GFX11 trap handling fix
i915:
- Use shmem for dpt objects
- Fix an error handling path in igt_write_huge()
msm:
- display:
- Fix to correct the UBWC programming for decoder version 4.3 seen
on SM8550
- Add the missing flush and fetch bits for DMA4 and DMA5 SSPPs.
- Fix to drop the unused dpu_core_perf_data_bus_id enum from the code
- Drop the unused dsi_phy_14nm_17mA_regulators from QCM 2290 DSI cfg.
- gpu:
- Fix warn splat for newer devices without revn
- Remove name/revn for a690.. we shouldn't be populating these for
newer devices, for consistency, but it slipped through review
- Fix a6xx gpu snapshot BINDLESS_DATA size (was listed in bytes
instead of dwords, causing AHB faults on a6xx gen4/a660-family)
- Disallow submit with fence id 0
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Merge tag 'drm-fixes-2023-07-28' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Regular scheduled fixes, msm and amdgpu leading the way, with some
i915 and a single misc fbdev, all seems fine.
fbdev:
- remove unused function
amdgpu:
- gfxhub partition fix
- Fix error handling in psp_sw_init()
- SMU13 fix
- DCN 3.1 fix
- DCN 3.2 fix
- Fix for display PHY programming sequence
- DP MST error handling fix
- GFX 9.4.3 fix
amdkfd:
- GFX11 trap handling fix
i915:
- Use shmem for dpt objects
- Fix an error handling path in igt_write_huge()
msm:
- display:
- Fix to correct the UBWC programming for decoder version 4.3 seen
on SM8550
- Add the missing flush and fetch bits for DMA4 and DMA5 SSPPs.
- Fix to drop the unused dpu_core_perf_data_bus_id enum from the
code
- Drop the unused dsi_phy_14nm_17mA_regulators from QCM 2290 DSI
cfg.
- gpu:
- Fix warn splat for newer devices without revn
- Remove name/revn for a690.. we shouldn't be populating these for
newer devices, for consistency, but it slipped through review
- Fix a6xx gpu snapshot BINDLESS_DATA size (was listed in bytes
instead of dwords, causing AHB faults on a6xx gen4/a660-family)
- Disallow submit with fence id 0"
* tag 'drm-fixes-2023-07-28' of git://anongit.freedesktop.org/drm/drm: (22 commits)
drm/msm: Disallow submit with fence id 0
drm/amdgpu: Restore HQD persistent state register
drm/amd/display: Unlock on error path in dm_handle_mst_sideband_msg_ready_event()
drm/amd/display: Exit idle optimizations before attempt to access PHY
drm/amd/display: Don't apply FIFO resync W/A if rdivider = 0
drm/amd/display: Guard DCN31 PHYD32CLK logic against chip family
drm/amd/smu: use AverageGfxclkFrequency* to replace previous GFX Curr Clock
drm/amd: Fix an error handling mistake in psp_sw_init()
drm/amdgpu: Fix infinite loop in gfxhub_v1_2_xcc_gart_enable (v2)
drm/amdkfd: fix trap handling work around for debugging
drm/fb-helper: Remove unused inline function drm_fb_helper_defio_init()
drm/i915: Fix an error handling path in igt_write_huge()
drm/i915/dpt: Use shmem for dpt objects
drm/msm: Fix hw_fence error path cleanup
drm/msm: Fix IS_ERR_OR_NULL() vs NULL check in a5xx_submit_in_rb()
drm/msm/adreno: Fix snapshot BINDLESS_DATA size
drm/msm/a690: Remove revn and name
drm/msm/adreno: Fix warn splat for devices without revn
drm/msm/dsi: Drop unused regulators from QCM2290 14nm DSI PHY config
drm/msm/dpu: drop enum dpu_core_perf_data_bus_id
...
- Update MAINTAINERS for cxl
- A few static analysis fixes
- Fix a Kconfig dependency for CONFIG_FW_LOADER
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Merge tag 'cxl-fixes-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl
Pull cxl fixes from Vishal Verma:
- Update MAINTAINERS for cxl
- A few static analysis fixes
- Fix a Kconfig dependency for CONFIG_FW_LOADER
* tag 'cxl-fixes-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl:
tools/testing/cxl: Remove unused SZ_512G macro
cxl/acpi: Return 'rc' instead of '0' in cxl_parse_cfmws()
cxl/acpi: Fix a use-after-free in cxl_parse_cfmws()
cxl: Update MAINTAINERS
cxl/mem: Fix a double shift bug
cxl: fix CONFIG_FW_LOADER dependency
This reverts commit 9e46e4dcd9d6cd88342b028dbfa5f4fb7483d39c.
kbuild reports a warning in memblock_remove_region() because of a false
positive caused by partial reset of the memblock state.
Doing the full reset will remove the false positives, but will allow
late use of memblock_free() to go unnoticed, so it is better to revert
the offending commit.
WARNING: CPU: 0 PID: 1 at mm/memblock.c:352 memblock_remove_region (kbuild/src/x86_64/mm/memblock.c:352 (discriminator 1))
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.5.0-rc3-00001-g9e46e4dcd9d6 #2
RIP: 0010:memblock_remove_region (kbuild/src/x86_64/mm/memblock.c:352 (discriminator 1))
Call Trace:
memblock_discard (kbuild/src/x86_64/mm/memblock.c:383)
page_alloc_init_late (kbuild/src/x86_64/include/linux/find.h:208 kbuild/src/x86_64/include/linux/nodemask.h:266 kbuild/src/x86_64/mm/mm_init.c:2405)
kernel_init_freeable (kbuild/src/x86_64/init/main.c:1325 kbuild/src/x86_64/init/main.c:1546)
kernel_init (kbuild/src/x86_64/init/main.c:1439)
ret_from_fork (kbuild/src/x86_64/arch/x86/kernel/process.c:145)
ret_from_fork_asm (kbuild/src/x86_64/arch/x86/entry/entry_64.S:298)
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202307271656.447aa17e-oliver.sang@intel.com
Signed-off-by: "Mike Rapoport (IBM)" <rppt@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mbind() calls down into vma_replace_policy() without taking the per-VMA
locks, replaces the VMA's vma->vm_policy pointer, and frees the old
policy. That's bad; a concurrent page fault might still be using the
old policy (in vma_alloc_folio()), resulting in use-after-free.
Normally this will manifest as a use-after-free read first, but it can
result in memory corruption, including because vma_alloc_folio() can
call mpol_cond_put() on the freed policy, which conditionally changes
the policy's refcount member.
This bug is specific to CONFIG_NUMA, but it does also affect non-NUMA
systems as long as the kernel was built with CONFIG_NUMA.
Signed-off-by: Jann Horn <jannh@google.com>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Fixes: 5e31275cc997 ("mm: add per-VMA lock and helper functions to control it")
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes for v6.5-rc4
Display:
+ Fix to correct the UBWC programming for decoder version 4.3 seen
on SM8550
+ Add the missing flush and fetch bits for DMA4 and DMA5 SSPPs.
+ Fix to drop the unused dpu_core_perf_data_bus_id enum from the code
+ Drop the unused dsi_phy_14nm_17mA_regulators from QCM 2290 DSI cfg.
GPU:
+ Fix warn splat for newer devices without revn
+ Remove name/revn for a690.. we shouldn't be populating these for
newer devices, for consistency, but it slipped through review
+ Fix a6xx gpu snapshot BINDLESS_DATA size (was listed in bytes
instead of dwords, causing AHB faults on a6xx gen4/a660-family)
+ Disallow submit with fence id 0
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rob Clark <robdclark@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/CAF6AEGs9MwCSfiyv8i7yWAsJKYEzCDyzaTx=ujX80Y23rZd9RA@mail.gmail.com
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Merge tag 'drm-misc-fixes-2023-07-27' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
A single patch to remove an unused function.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <mripard@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/dqvxednqyab5t7gvwvcq72x6yu7ug5gusmhpgs3kq6z7pf3co6@ofr6s7547gbe
- Driver fixes for
- Out of bound fix for hisilicon phy
- Qualcomm synopsis femto phy for keeping clock enabled during suspend
and enabling ref clocks
- Mediatek driver fixes for upper limit test and error code
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Merge tag 'phy-fixes-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy
Pull phy fixes from Vinod Koul:
- Out of bound fix for hisilicon phy
- Qualcomm synopsis femto phy for keeping clock enabled during suspend
and enabling ref clocks
- Mediatek driver fixes for upper limit test and error code
* tag 'phy-fixes-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy:
phy: hisilicon: Fix an out of bounds check in hisi_inno_phy_probe()
phy: qcom-snps-femto-v2: use qcom_snps_hsphy_suspend/resume error code
phy: qcom-snps-femto-v2: properly enable ref clock
phy: qcom-snps-femto-v2: keep cfg_ahb_clk enabled during runtime suspend
phy: mediatek: hdmi: mt8195: fix prediv bad upper limit test
phy: phy-mtk-dp: Fix an error code in probe()
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Merge tag 'for-6.5-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
- fix accounting of global block reserve size when block group tree is
enabled
- the async discard has been enabled in 6.2 unconditionally, but for
zoned mode it does not make that much sense to do it asynchronously
as the zones are reset as needed
- error handling and proper error value propagation fixes
* tag 'for-6.5-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: check for commit error at btrfs_attach_transaction_barrier()
btrfs: check if the transaction was aborted at btrfs_wait_for_commit()
btrfs: remove BUG_ON()'s in add_new_free_space()
btrfs: account block group tree when calculating global reserve size
btrfs: zoned: do not enable async discard
A call to memblock_free() or memblock_phys_free() issued after memblock
data is discarded will result in use after free in
memblock_isolate_range().
When CONFIG_KASAN is enabled, this will cause a panic early in boot.
Without CONFIG_KASAN, there is a chance that memblock_isolate_range() might
scribble on memory that is now in use by somebody else.
Avoid those issues by making sure that memblock_discard points
memblock.reserved.regions back at the static buffer.
If memblock_free() or memblock_phys_free() is called after memblock memory
is discarded, that will print a warning in memblock_remove_region().
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Merge tag 'fixes-2023-07-27' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
Pull memblock fix from Mike Rapoport:
"A call to memblock_free() or memblock_phys_free() issued after
memblock data is discarded will result in use after free in
memblock_isolate_range().
Avoid those issues by making sure that memblock_discard points
memblock.reserved.regions back at the static buffer"
* tag 'fixes-2023-07-27' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
mm,memblock: reset memblock.reserved to system init state to prevent UAF
lock_vma_under_rcu() tries to guarantee that __anon_vma_prepare() can't
be called in the VMA-locked page fault path by ensuring that
vma->anon_vma is set.
However, this check happens before the VMA is locked, which means a
concurrent move_vma() can concurrently call unlink_anon_vmas(), which
disassociates the VMA's anon_vma.
This means we can get UAF in the following scenario:
THREAD 1 THREAD 2
======== ========
<page fault>
lock_vma_under_rcu()
rcu_read_lock()
mas_walk()
check vma->anon_vma
mremap() syscall
move_vma()
vma_start_write()
unlink_anon_vmas()
<syscall end>
handle_mm_fault()
__handle_mm_fault()
handle_pte_fault()
do_pte_missing()
do_anonymous_page()
anon_vma_prepare()
__anon_vma_prepare()
find_mergeable_anon_vma()
mas_walk() [looks up VMA X]
munmap() syscall (deletes VMA X)
reusable_anon_vma() [called on freed VMA X]
This is a security bug if you can hit it, although an attacker would
have to win two races at once where the first race window is only a few
instructions wide.
This patch is based on some previous discussion with Linus Torvalds on
the security list.
Cc: stable@vger.kernel.org
Fixes: 5e31275cc997 ("mm: add per-VMA lock and helper functions to control it")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
syzkaller found a race where IOMMUFD_DESTROY increments the refcount:
obj = iommufd_get_object(ucmd->ictx, cmd->id, IOMMUFD_OBJ_ANY);
if (IS_ERR(obj))
return PTR_ERR(obj);
iommufd_ref_to_users(obj);
/* See iommufd_ref_to_users() */
if (!iommufd_object_destroy_user(ucmd->ictx, obj))
As part of the sequence to join the two existing primitives together.
Allowing the refcount the be elevated without holding the destroy_rwsem
violates the assumption that all temporary refcount elevations are
protected by destroy_rwsem. Racing IOMMUFD_DESTROY with
iommufd_object_destroy_user() will cause spurious failures:
WARNING: CPU: 0 PID: 3076 at drivers/iommu/iommufd/device.c:477 iommufd_access_destroy+0x18/0x20 drivers/iommu/iommufd/device.c:478
Modules linked in:
CPU: 0 PID: 3076 Comm: syz-executor.0 Not tainted 6.3.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:iommufd_access_destroy+0x18/0x20 drivers/iommu/iommufd/device.c:477
Code: e8 3d 4e 00 00 84 c0 74 01 c3 0f 0b c3 0f 1f 44 00 00 f3 0f 1e fa 48 89 fe 48 8b bf a8 00 00 00 e8 1d 4e 00 00 84 c0 74 01 c3 <0f> 0b c3 0f 1f 44 00 00 41 57 41 56 41 55 4c 8d ae d0 00 00 00 41
RSP: 0018:ffffc90003067e08 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888109ea0300 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 00000000ffffffff
RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88810bbb3500
R10: ffff88810bbb3e48 R11: 0000000000000000 R12: ffffc90003067e88
R13: ffffc90003067ea8 R14: ffff888101249800 R15: 00000000fffffffe
FS: 00007ff7254fe6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557262da8 CR3: 000000010a6fd000 CR4: 0000000000350ef0
Call Trace:
<TASK>
iommufd_test_create_access drivers/iommu/iommufd/selftest.c:596 [inline]
iommufd_test+0x71c/0xcf0 drivers/iommu/iommufd/selftest.c:813
iommufd_fops_ioctl+0x10f/0x1b0 drivers/iommu/iommufd/main.c:337
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x84/0xc0 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The solution is to not increment the refcount on the IOMMUFD_DESTROY path
at all. Instead use the xa_lock to serialize everything. The refcount
check == 1 and xa_erase can be done under a single critical region. This
avoids the need for any refcount incrementing.
It has the downside that if userspace races destroy with other operations
it will get an EBUSY instead of waiting, but this is kind of racing is
already dangerous.
Fixes: 2ff4bed7fee7 ("iommufd: File descriptor, context, kconfig and makefiles")
Link: https://lore.kernel.org/r/2-v1-85aacb2af554+bc-iommufd_syz3_jgg@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reported-by: syzbot+7574ebfe589049630608@syzkaller.appspotmail.com
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
A collection of device specific fixes, none particularly remarkable.
There's a set of repetitive fixes for the RealTek drivers fixing an
issue with suspend that was replicated in multiple drivers.
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Merge tag 'asoc-fix-v6.5-rc3' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v6.5
A collection of device specific fixes, none particularly remarkable.
There's a set of repetitive fixes for the RealTek drivers fixing an
issue with suspend that was replicated in multiple drivers.
If tipc_link_bc_create() fails inside tipc_node_create() for a newly
allocated tipc node then we should stop its tipc crypto and free the
resources allocated with a call to tipc_crypto_start().
As the node ref is initialized to one to that point, just put the ref on
tipc_link_bc_create() error case that would lead to tipc_node_free() be
eventually executed and properly clean the node and its crypto resources.
Found by Linux Verification Center (linuxtesting.org).
Fixes: cb8092d70a6f ("tipc: move bc link creation back to tipc_node_create")
Suggested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Reviewed-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/20230725214628.25246-1-pchelkin@ispras.ru
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
kernel test robot reported slab-out-of-bounds access in strlen(). [0]
Commit 06d4c8a80836 ("af_unix: Fix fortify_panic() in unix_bind_bsd().")
removed unix_mkname_bsd() call in unix_bind_bsd().
If sunaddr->sun_path is not terminated by user and we don't enable
CONFIG_INIT_STACK_ALL_ZERO=y, strlen() will do the out-of-bounds access
during file creation.
Let's go back to strlen()-with-sockaddr_storage way and pack all 108
trickiness into unix_mkname_bsd() with bold comments.
[0]:
BUG: KASAN: slab-out-of-bounds in strlen (lib/string.c:?)
Read of size 1 at addr ffff000015492777 by task fortify_strlen_/168
CPU: 0 PID: 168 Comm: fortify_strlen_ Not tainted 6.5.0-rc1-00333-g3329b603ebba #16
Hardware name: linux,dummy-virt (DT)
Call trace:
dump_backtrace (arch/arm64/kernel/stacktrace.c:235)
show_stack (arch/arm64/kernel/stacktrace.c:242)
dump_stack_lvl (lib/dump_stack.c:107)
print_report (mm/kasan/report.c:365 mm/kasan/report.c:475)
kasan_report (mm/kasan/report.c:590)
__asan_report_load1_noabort (mm/kasan/report_generic.c:378)
strlen (lib/string.c:?)
getname_kernel (./include/linux/fortify-string.h:? fs/namei.c:226)
kern_path_create (fs/namei.c:3926)
unix_bind (net/unix/af_unix.c:1221 net/unix/af_unix.c:1324)
__sys_bind (net/socket.c:1792)
__arm64_sys_bind (net/socket.c:1801)
invoke_syscall (arch/arm64/kernel/syscall.c:? arch/arm64/kernel/syscall.c:52)
el0_svc_common (./include/linux/thread_info.h:127 arch/arm64/kernel/syscall.c:147)
do_el0_svc (arch/arm64/kernel/syscall.c:189)
el0_svc (./arch/arm64/include/asm/daifflags.h:28 arch/arm64/kernel/entry-common.c:133 arch/arm64/kernel/entry-common.c:144 arch/arm64/kernel/entry-common.c:648)
el0t_64_sync_handler (arch/arm64/kernel/entry-common.c:?)
el0t_64_sync (arch/arm64/kernel/entry.S:591)
Allocated by task 168:
kasan_set_track (mm/kasan/common.c:45 mm/kasan/common.c:52)
kasan_save_alloc_info (mm/kasan/generic.c:512)
__kasan_kmalloc (mm/kasan/common.c:383)
__kmalloc (mm/slab_common.c:? mm/slab_common.c:998)
unix_bind (net/unix/af_unix.c:257 net/unix/af_unix.c:1213 net/unix/af_unix.c:1324)
__sys_bind (net/socket.c:1792)
__arm64_sys_bind (net/socket.c:1801)
invoke_syscall (arch/arm64/kernel/syscall.c:? arch/arm64/kernel/syscall.c:52)
el0_svc_common (./include/linux/thread_info.h:127 arch/arm64/kernel/syscall.c:147)
do_el0_svc (arch/arm64/kernel/syscall.c:189)
el0_svc (./arch/arm64/include/asm/daifflags.h:28 arch/arm64/kernel/entry-common.c:133 arch/arm64/kernel/entry-common.c:144 arch/arm64/kernel/entry-common.c:648)
el0t_64_sync_handler (arch/arm64/kernel/entry-common.c:?)
el0t_64_sync (arch/arm64/kernel/entry.S:591)
The buggy address belongs to the object at ffff000015492700
which belongs to the cache kmalloc-128 of size 128
The buggy address is located 0 bytes to the right of
allocated 119-byte region [ffff000015492700, ffff000015492777)
The buggy address belongs to the physical page:
page:00000000aeab52ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x55492
anon flags: 0x3fffc0000000200(slab|node=0|zone=0|lastcpupid=0xffff)
page_type: 0xffffffff()
raw: 03fffc0000000200 ffff0000084018c0 fffffc00003d0e00 0000000000000005
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff000015492600: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff000015492680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff000015492700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 07 fc
^
ffff000015492780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff000015492800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
Fixes: 06d4c8a80836 ("af_unix: Fix fortify_panic() in unix_bind_bsd().")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/netdev/202307262110.659e5e8-oliver.sang@intel.com/
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230726190828.47874-1-kuniyu@amazon.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
goto free_skb if an unexpected result is returned by pskb_tirm()
in tipc_crypto_rcv_complete().
Fixes: fc1b6d6de220 ("tipc: introduce TIPC encryption & authentication")
Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com>
Reviewed-by: Tung Nguyen <tung.q.nguyen@dektech.com.au>
Link: https://lore.kernel.org/r/20230725064810.5820-1-ruc_gongyuanjun@163.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
in be_lancer_xmit_workarounds(), it should go to label 'tx_drop'
if an unexpected value is returned by pskb_trim().
Fixes: 93040ae5cc8d ("be2net: Fix to trim skb for padded vlan packets to workaround an ASIC Bug")
Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com>
Link: https://lore.kernel.org/r/20230725032726.15002-1-ruc_gongyuanjun@163.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This laptop has CS35L41 amp connected via I2C.
With this patch speakers begin to work if the
missing _DSD properties are added to ACPI tables.
Signed-off-by: Pavel Asyutchenko <svenpavel@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20230726223732.20775-1-svenpavel@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Merge tag 'nf-23-07-26' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
Florian Westphal says:
====================
netfilter fixes for net
1. On-demand overlap detection in 'rbtree' set can cause memory leaks.
This is broken since 6.2.
2. An earlier fix in 6.4 to address an imbalance in refcounts during
transaction error unwinding was incomplete, from Pablo Neira.
3. Disallow adding a rule to a deleted chain, also from Pablo.
Broken since 5.9.
* tag 'nf-23-07-26' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
netfilter: nf_tables: disallow rule addition to bound chain via NFTA_RULE_CHAIN_ID
netfilter: nf_tables: skip immediate deactivate in _PREPARE_ERROR
netfilter: nft_set_rbtree: fix overlap expiration walk
====================
Link: https://lore.kernel.org/r/20230726152524.26268-1-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
A race were found where set_channels could be called after registering
but before virtnet_set_queues() in virtnet_probe(). Fixing this by
moving the virtnet_set_queues() before netdevice registering. While at
it, use _virtnet_set_queues() to avoid holding rtnl as the device is
not even registered at that time.
Cc: stable@vger.kernel.org
Fixes: a220871be66f ("virtio-net: correctly enable multiqueue")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230725072049.617289-1-jasowang@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The nla_for_each_nested parsing in function mqprio_parse_nlattr() does
not check the length of the nested attribute. This can lead to an
out-of-attribute read and allow a malformed nlattr (e.g., length 0) to
be viewed as 8 byte integer and passed to priv->max_rate/min_rate.
This patch adds the check based on nla_len() when check the nla_type(),
which ensures that the length of these two attribute must equals
sizeof(u64).
Fixes: 4e8b86c06269 ("mqprio: Introduce new hardware offload mode and shaper in mqprio")
Reviewed-by: Victor Nogueira <victor@mojatatu.com>
Signed-off-by: Lin Ma <linma@zju.edu.cn>
Link: https://lore.kernel.org/r/20230725024227.426561-1-linma@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
LTP sendfile07 [1], which expects sendfile() to return EAGAIN when
transferring data from regular file to a "full" O_NONBLOCK socket,
started failing after commit 2dc334f1a63a ("splice, net: Use
sendmsg(MSG_SPLICE_PAGES) rather than ->sendpage()").
sendfile() no longer immediately returns, but now blocks.
Removed sock_sendpage() handled this case by setting a MSG_DONTWAIT
flag, fix new splice_to_socket() to do the same for O_NONBLOCK sockets.
[1] https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/syscalls/sendfile/sendfile07.c
Fixes: 2dc334f1a63a ("splice, net: Use sendmsg(MSG_SPLICE_PAGES) rather than ->sendpage()")
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Jan Stancek <jstancek@redhat.com>
Tested-by: Xi Ruoyao <xry111@xry111.site>
Link: https://lore.kernel.org/r/023c0e21e595e00b93903a813bc0bfb9a5d7e368.1690219914.git.jstancek@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
According to the clarification [1] in the latest napi.rst, the tx
processing cannot call any XDP (or page pool) APIs if the "budget"
is 0. Because NAPI is called with the budget of 0 (such as netpoll)
indicates we may be in an IRQ context, however, we cannot use the
page pool from IRQ context.
[1] https://lore.kernel.org/all/20230720161323.2025379-1-kuba@kernel.org/
Fixes: 20f797399035 ("net: fec: recycle pages for transmitted XDP frames")
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230725074148.2936402-1-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Mat Martineau says:
====================
mptcp: More fixes for 6.5
Patch 1: Better detection of ip6tables vs ip6tables-legacy tools for
self tests. Fix for 6.4 and newer.
Patch 2: Only generate "new listener" event if listen operation
succeeds. Fix for 6.2 and newer.
====================
Link: https://lore.kernel.org/r/20230725-send-net-20230725-v1-0-6f60fe7137a9@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Currently the mptcp code generate a "new listener" event even
if the actual listen() syscall fails. Address the issue moving
the event generation call under the successful branch.
Cc: stable@vger.kernel.org
Fixes: f8c9dfbd875b ("mptcp: add pm listener events")
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20230725-send-net-20230725-v1-2-6f60fe7137a9@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
If 'iptables-legacy' is available, 'ip6tables-legacy' command will be
used instead of 'ip6tables'. So no need to look if 'ip6tables' is
available in this case.
Cc: stable@vger.kernel.org
Fixes: 0c4cd3f86a40 ("selftests: mptcp: join: use 'iptables-legacy' if available")
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20230725-send-net-20230725-v1-1-6f60fe7137a9@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When attribute is enum type and marked as multi-attr, the netlink
respond is not parsed, fails with stack trace:
Traceback (most recent call last):
File "/net-next/tools/net/ynl/./test.py", line 520, in <module>
main()
File "/net-next/tools/net/ynl/./test.py", line 488, in main
dplls=dplls_get(282574471561216)
File "/net-next/tools/net/ynl/./test.py", line 48, in dplls_get
reply=act(args)
File "/net-next/tools/net/ynl/./test.py", line 41, in act
reply = ynl.dump(args.dump, attrs)
File "/net-next/tools/net/ynl/lib/ynl.py", line 598, in dump
return self._op(method, vals, dump=True)
File "/net-next/tools/net/ynl/lib/ynl.py", line 584, in _op
rsp_msg = self._decode(gm.raw_attrs, op.attr_set.name)
File "/net-next/tools/net/ynl/lib/ynl.py", line 451, in _decode
self._decode_enum(rsp, attr_spec)
File "/net-next/tools/net/ynl/lib/ynl.py", line 408, in _decode_enum
value = enum.entries_by_val[raw].name
TypeError: unhashable type: 'list'
error: 1
Redesign _decode_enum(..) to take a enum int value and translate
it to either a bitmask or enum name as expected.
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Link: https://lore.kernel.org/r/20230725101642.267248-3-arkadiusz.kubalewski@intel.com
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Remove wrong index adjustment, which is leftover from adding
support for sparse enums.
enum.entries_by_val() function shall not subtract the start-value, as
it is indexed with real enum value.
Fixes: c311aaa74ca1 ("tools: ynl: fix enum-as-flags in the generic CLI")
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Link: https://lore.kernel.org/r/20230725101642.267248-2-arkadiusz.kubalewski@intel.com
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Misc. small fixes and hw-id additions.
The following is an automated git shortlog grouped by driver:
asus-wmi:
- Fix setting RGB mode on some TUF laptops
huawei-wmi:
- Silence ambient light sensor
intel:
- hid: Always call BTNL ACPI method
msi-laptop:
- Fix rfkill out-of-sync on MSI Wind U100
platform/x86/amd:
- pmc: Use release_mem_region() to undo request_mem_region_muxed()
platform/x86/amd/pmf:
- Notify OS power slider update
- reduce verbosity of apmf_get_system_params
platform/x86/intel/hid:
- Add HP Dragonfly G2 to VGBS DMI quirks
serial-multi-instantiate:
- Auto detect IRQ resource for CSC3551
think-lmi:
- Use kfree_sensitive instead of kfree
touchscreen_dmi.c:
- small changes for Archos 101 Cesium Educ tablet
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Merge tag 'platform-drivers-x86-v6.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86
Pull x86 platform driver fixes from Hans de Goede:
"Misc small fixes and hw-id additions"
* tag 'platform-drivers-x86-v6.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86:
platform/x86: huawei-wmi: Silence ambient light sensor
platform/x86: msi-laptop: Fix rfkill out-of-sync on MSI Wind U100
platform/x86: asus-wmi: Fix setting RGB mode on some TUF laptops
platform/x86: think-lmi: Use kfree_sensitive instead of kfree
platform/x86/intel/hid: Add HP Dragonfly G2 to VGBS DMI quirks
platform/x86: intel: hid: Always call BTNL ACPI method
platform/x86/amd/pmf: Notify OS power slider update
platform/x86/amd/pmf: reduce verbosity of apmf_get_system_params
platform/x86: serial-multi-instantiate: Auto detect IRQ resource for CSC3551
platform/x86/amd: pmc: Use release_mem_region() to undo request_mem_region_muxed()
platform/x86: touchscreen_dmi.c: small changes for Archos 101 Cesium Educ tablet
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Merge tag '6.5-rc3-ksmbd-server-fixes' of git://git.samba.org/ksmbd
Pull ksmbd server fixes from Steve French:
- fixes for two possible out of bounds access (in negotiate, and in
decrypt msg)
- fix unsigned compared to zero warning
- fix path lookup crossing a mountpoint
- fix case when first compound request is a tree connect
- fix memory leak if reads are compounded
* tag '6.5-rc3-ksmbd-server-fixes' of git://git.samba.org/ksmbd:
ksmbd: fix out of bounds in init_smb2_rsp_hdr()
ksmbd: no response from compound read
ksmbd: validate session id and tree id in compound request
ksmbd: fix out of bounds in smb3_decrypt_req()
ksmbd: check if a mount point is crossed during path lookup
ksmbd: Fix unsigned expression compared with zero
Maintenance patch for native DSD support.
Remove incorrect T+A device quirks. Move set of device quirks to vendor
quirks. Add set of missing device and vendor quirks.
Signed-off-by: Jussi Laako <jussi@sonarnerd.net>
Link: https://lore.kernel.org/r/20230726165645.404311-1-jussi@sonarnerd.net
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Commit eda0047296a1 ("mm: make the page fault mmap locking killable")
intentionally made it much easier to trigger the "page fault fails
because a fatal signal is pending" situation, by having the mmap locking
fail early in that case.
We have long aborted page faults in other fatal cases when the actual IO
for a page is interrupted by SIGKILL - which is particularly useful for
the traditional case of NFS hanging due to network issues, but local
filesystems could cause it too if you happened to get the SIGKILL while
waiting for a page to be faulted in (eg lock_folio_maybe_drop_mmap()).
So aborting the page fault wasn't a new condition - but it now triggers
earlier, before we even get to 'handle_mm_fault()'. And as a result the
error doesn't go through our 'fault_signal_pending()' logic, and doesn't
get filtered away there.
Normally you'd never even notice, because if a fatal signal is pending,
the new SIGSEGV we send ends up being ignored anyway.
But it turns out that there is one very noticeable exception: if you
enable 'show_unhandled_signals', the aborted page fault will be logged
in the kernel messages, and you'll get a scary line looking something
like this in your logs:
pverados[2183248]: segfault at 55e5a00f9ae0 ip 000055e5a00f9ae0 sp 00007ffc0720bea8 error 14 in perl[55e5a00d4000+195000] likely on CPU 10 (core 4, socket 0)
which is rather misleading. It's not really a segfault at all, it's
just "the thread was killed before the page fault completed, so we
aborted the page fault".
Fix this by just making it clear that a pending fatal signal means that
any new signal coming in after that is implicitly handled. This will
avoid the misleading logging, since now the signal isn't 'unhandled' any
more.
Reported-and-tested-by: Fiona Ebner <f.ebner@proxmox.com>
Tested-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Link: https://lore.kernel.org/lkml/8d063a26-43f5-0bb7-3203-c6a04dc159f8@proxmox.com/
Acked-by: Oleg Nesterov <oleg@redhat.com>
Fixes: eda0047296a1 ("mm: make the page fault mmap locking killable")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
A fence id of zero is expected to be invalid, and is not removed from
the fence_idr table. If userspace is requesting to specify the fence
id with the FENCE_SN_IN flag, we need to reject a zero fence id value.
Fixes: 17154addc5c1 ("drm/msm: Add MSM_SUBMIT_FENCE_SN_IN")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/549180/
Bail out with EOPNOTSUPP when adding rule to bound chain via
NFTA_RULE_CHAIN_ID. The following warning splat is shown when
adding a rule to a deleted bound chain:
WARNING: CPU: 2 PID: 13692 at net/netfilter/nf_tables_api.c:2013 nf_tables_chain_destroy+0x1f7/0x210 [nf_tables]
CPU: 2 PID: 13692 Comm: chain-bound-rul Not tainted 6.1.39 #1
RIP: 0010:nf_tables_chain_destroy+0x1f7/0x210 [nf_tables]
Fixes: d0e2c7de92c7 ("netfilter: nf_tables: add NFT_CHAIN_BINDING")
Reported-by: Kevin Rich <kevinrich1337@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
On error when building the rule, the immediate expression unbinds the
chain, hence objects can be deactivated by the transaction records.
Otherwise, it is possible to trigger the following warning:
WARNING: CPU: 3 PID: 915 at net/netfilter/nf_tables_api.c:2013 nf_tables_chain_destroy+0x1f7/0x210 [nf_tables]
CPU: 3 PID: 915 Comm: chain-bind-err- Not tainted 6.1.39 #1
RIP: 0010:nf_tables_chain_destroy+0x1f7/0x210 [nf_tables]
Fixes: 4bedf9eee016 ("netfilter: nf_tables: fix chain binding transaction logic")
Reported-by: Kevin Rich <kevinrich1337@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
The lazy gc on insert that should remove timed-out entries fails to release
the other half of the interval, if any.
Can be reproduced with tests/shell/testcases/sets/0044interval_overlap_0
in nftables.git and kmemleak enabled kernel.
Second bug is the use of rbe_prev vs. prev pointer.
If rbe_prev() returns NULL after at least one iteration, rbe_prev points
to element that is not an end interval, hence it should not be removed.
Lastly, check the genmask of the end interval if this is active in the
current generation.
Fixes: c9e6978e2725 ("netfilter: nft_set_rbtree: Switch to node list walk for overlap detection")
Signed-off-by: Florian Westphal <fw@strlen.de>
btrfs_attach_transaction_barrier() is used to get a handle pointing to the
current running transaction if the transaction has not started its commit
yet (its state is < TRANS_STATE_COMMIT_START). If the transaction commit
has started, then we wait for the transaction to commit and finish before
returning - however we completely ignore if the transaction was aborted
due to some error during its commit, we simply return ERR_PT(-ENOENT),
which makes the caller assume everything is fine and no errors happened.
This could make an fsync return success (0) to user space when in fact we
had a transaction abort and the target inode changes were therefore not
persisted.
Fix this by checking for the return value from btrfs_wait_for_commit(),
and if it returned an error, return it back to the caller.
Fixes: d4edf39bd5db ("Btrfs: fix uncompleted transaction")
CC: stable@vger.kernel.org # 4.19+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The qca8k switch doesn't support using 0 as VID and require a default
VID to be always set. MDB add/del function doesn't currently handle
this and are currently setting the default VID.
Fix this by correctly handling this corner case and internally use the
default VID for VID 0 case.
Fixes: ba8f870dfa63 ("net: dsa: qca8k: add support for mdb_add/del")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
On deleting an MDB entry for a port, fdb_search_and_del is used.
An FDB entry can't be modified so it needs to be deleted and readded
again with the new portmap (and the port deleted as requested)
We use the SEARCH operator to search the entry to edit by vid and mac
address and then we check the aging if we actually found an entry.
Currently the code suffer from a bug where the searched fdb entry is
never read again with the found values (if found) resulting in the code
always returning -EINVAL as aging was always 0.
Fix this by correctly read the fdb entry after it was searched.
Fixes: ba8f870dfa63 ("net: dsa: qca8k: add support for mdb_add/del")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
On inserting a mdb entry, fdb_search_and_insert is used to add a port to
the qca8k target entry in the FDB db.
A FDB entry can't be modified so it needs to be removed and insert again
with the new values.
To detect if an entry already exist, the SEARCH operation is used and we
check the aging of the entry. If the entry is not 0, the entry exist and
we proceed to delete it.
Current code have 2 main problem:
- The condition to check if the FDB entry exist is wrong and should be
the opposite.
- When a FDB entry doesn't exist, aging was never actually set to the
STATIC value resulting in allocating an invalid entry.
Fix both problem by adding aging support to the function, calling the
function with STATIC as aging by default and finally by correct the
condition to check if the entry actually exist.
Fixes: ba8f870dfa63 ("net: dsa: qca8k: add support for mdb_add/del")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
The qca8xxx switch supports 2 way to write reg values, a slow way using
mdio and a fast way by sending specially crafted mgmt packet to
read/write reg.
The fast way can support up to 32 bytes of data as eth packet are used
to send/receive.
This correctly works for almost the entire regmap of the switch but with
the use of some kernel selftests for dsa drivers it was found a funny
and interesting hw defect/limitation.
For some specific reg, bulk write won't work and will result in writing
only part of the requested regs resulting in half data written. This was
especially hard to track and discover due to the total strangeness of
the problem and also by the specific regs where this occurs.
This occurs in the specific regs of the ATU table, where multiple entry
needs to be written to compose the entire entry.
It was discovered that with a bulk write of 12 bytes on
QCA8K_REG_ATU_DATA0 only QCA8K_REG_ATU_DATA0 and QCA8K_REG_ATU_DATA2
were written, but QCA8K_REG_ATU_DATA1 was always zero.
Tcpdump was used to make sure the specially crafted packet was correct
and this was confirmed.
The problem was hard to track as the lack of QCA8K_REG_ATU_DATA1
resulted in an entry somehow possible as the first bytes of the mac
address are set in QCA8K_REG_ATU_DATA0 and the entry type is set in
QCA8K_REG_ATU_DATA2.
Funlly enough writing QCA8K_REG_ATU_DATA1 results in the same problem
with QCA8K_REG_ATU_DATA2 empty and QCA8K_REG_ATU_DATA1 and
QCA8K_REG_ATU_FUNC correctly written.
A speculation on the problem might be that there are some kind of
indirection internally when accessing these regs and they can't be
accessed all together, due to the fact that it's really a table mapped
somewhere in the switch SRAM.
Even more funny is the fact that every other reg was tested with all
kind of combination and they are not affected by this problem. Read
operation was also tested and always worked so it's not affected by this
problem.
The problem is not present if we limit writing a single reg at times.
To handle this hardware defect, enable use_single_write so that bulk
api can correctly split the write in multiple different operation
effectively reverting to a non-bulk write.
Cc: Mark Brown <broonie@kernel.org>
Fixes: c766e077d927 ("net: dsa: qca8k: convert to regmap read/write API")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds
Mike Rapoport (IBM)
Jann Horn
Dave Airlie
Jason Gunthorpe
Takashi Iwai
Fedor Pchelkin
Kuniyuki Iwashima
Yuanjun Gong
Pavel Asyutchenko
Jakub Kicinski
Jason Wang
Lin Ma
Jan Stancek
Wei Fang
Paolo Abeni
Matthieu Baerts
Arkadiusz Kubalewski
Jussi Laako
Rob Clark
Pablo Neira Ayuso
Florian Westphal
Filipe Manana
Muhammad Husaini Zulkifli
Christian Marangi