Fix several bugs in the RISC-V kgdb implementation:
- The element of dbg_reg_def[] that is supposed to pertain to the S1
register embeds instead the struct pt_regs offset of the A1
register. Fix this to use the S1 register offset in struct pt_regs.
- The sleeping_thread_to_gdb_regs() function copies the value of the
S10 register into the gdb_regs[] array element meant for the S9
register, and copies the value of the S11 register into the array
element meant for the S10 register. It also neglects to copy the
value of the S11 register. Fix all of these issues.
Fixes: fe89bd2be8 ("riscv: Add KGDB support")
Cc: Vincent Chen <vincent.chen@sifive.com>
Link: https://patch.msgid.link/fde376f8-bcfd-bfe4-e467-07d8f7608d05@kernel.org
Signed-off-by: Paul Walmsley <pjw@kernel.org>
- new IDs for BETOP BTP-KP50B/C and Razer Wolverine V3 Pro added to
xpad controller driver
- another quirk for new TUXEDO InfinityBook added to i8042
- a small fixup for Synaptics RMI4 driver to properly unlock mutex when
encountering an error in F54
- an update to bcm5974 touch controller driver to reliably switch into
wellspring mode.
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Merge tag 'input-for-v7.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input fixes from Dmitry Torokhov:
- new IDs for BETOP BTP-KP50B/C and Razer Wolverine V3 Pro added to
xpad controller driver
- another quirk for new TUXEDO InfinityBook added to i8042
- a small fixup for Synaptics RMI4 driver to properly unlock mutex when
encountering an error in F54
- an update to bcm5974 touch controller driver to reliably switch into
wellspring mode
* tag 'input-for-v7.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: xpad - add support for BETOP BTP-KP50B/C controller's wireless mode
Input: xpad - add support for Razer Wolverine V3 Pro
Input: synaptics-rmi4 - fix a locking bug in an error path
Input: i8042 - add TUXEDO InfinityBook Max 16 Gen10 AMD to i8042 quirk table
Input: bcm5974 - recover from failed mode switch
In previous patch "Documentation: clarify the mandatory and desirable
info for security reports" I left two typos that I didn't detect in local
checks. One is "get_maintainers.pl" (no 's' in the script name), and the
other one is a missing closing quote after "Reported-by", which didn't
have effect here but I don't know if it can break rendering elsewhere
(e.g. on the public HTML page). Better fix it before it gets merged.
Signed-off-by: Willy Tarreau <w@1wt.eu>
Link: https://patch.msgid.link/20260404082033.5160-1-w@1wt.eu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add device IDs for the Razer Wolverine V3 Pro controller in both
wired (0x0a57) and wireless 2.4 GHz dongle (0x0a59) modes.
The controller uses the Xbox 360 protocol (vendor-specific class,
subclass 93, protocol 1) on interface 0 with an identical 20-byte
input report layout, so no additional processing is needed.
Signed-off-by: Zoltan Illes <zoliviragh@gmail.com>
Link: https://patch.msgid.link/20260329220031.1325509-1-137647604+ZlordHUN@users.noreply.github.com
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
- Fix a memory leak in the zcrypt driver where the AP message buffer
for clear key RSA requests was allocated twice, once by the caller
and again locally, causing the first allocation to never be freed
- Fix the cpum_sf perf sampling rate overflow adjustment to clamp the
recalculated rate to the hardware maximum, preventing exceptions on
heavily loaded systems running with HZ=1000
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Merge tag 's390-7.0-7' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Vasily Gorbik:
- Fix a memory leak in the zcrypt driver where the AP message buffer
for clear key RSA requests was allocated twice, once by the caller
and again locally, causing the first allocation to never be freed
- Fix the cpum_sf perf sampling rate overflow adjustment to clamp the
recalculated rate to the hardware maximum, preventing exceptions on
heavily loaded systems running with HZ=1000
* tag 's390-7.0-7' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/zcrypt: Fix memory leak with CCA cards used as accelerator
s390/cpum_sf: Cap sampling rate to prevent lsctl exception
- asus-ec-sensors: Fix temperature sensor for PRIME X670E-PRO WIFI
- occ: Add missing newline, and fix potential division by zero
- pmbus/tps53679: Fix device ID comparison and printing in tps53676_identify()
- pmbus/ltc4286: Add missing MODULE_IMPORT_NS("PMBUS")
- pmbus/pxe1610: Check return value of page-select write in probe
- pmbus/tps53679: Fix array access with zero-length block read
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Merge tag 'hwmon-for-v7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
- Fix temperature sensor for PRIME X670E-PRO WIFI
- occ: Add missing newline, and fix potential division by zero
- pmbus:
- Fix device ID comparison and printing in tps53676_identify()
- Add missing MODULE_IMPORT_NS("PMBUS") for ltc4286
- Check return value of page-select write in pxe1610 probe
- Fix array access with zero-length block tps53679 read
* tag 'hwmon-for-v7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (asus-ec-sensors) Fix T_Sensor for PRIME X670E-PRO WIFI
hwmon: (occ) Fix missing newline in occ_show_extended()
hwmon: (occ) Fix division by zero in occ_show_power_1()
hwmon: (tps53679) Fix device ID comparison and printing in tps53676_identify()
hwmon: (ltc4286) Add missing MODULE_IMPORT_NS("PMBUS")
hwmon: (pxe1610) Check return value of page-select write in probe
hwmon: (tps53679) Fix array access with zero-length block read
- Fix stale direct dispatch state in ddsp_dsq_id which can cause
spurious warnings in mark_direct_dispatch() on task wakeup.
- Fix is_bpf_migration_disabled() false negative on non-PREEMPT_RCU
configs which can lead to incorrectly dispatching migration-disabled
tasks to remote CPUs.
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Merge tag 'sched_ext-for-7.0-rc6-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext
Pull sched_ext fixes from Tejun Heo:
"These are late but both fix subtle yet critical problems and the blast
radius is limited strictly to sched_ext.
- Fix stale direct dispatch state in ddsp_dsq_id which can cause
spurious warnings in mark_direct_dispatch() on task wakeup
- Fix is_bpf_migration_disabled() false negative on non-PREEMPT_RCU
configs which can lead to incorrectly dispatching migration-
disabled tasks to remote CPUs"
* tag 'sched_ext-for-7.0-rc6-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext:
sched_ext: Fix stale direct dispatch state in ddsp_dsq_id
sched_ext: Fix is_bpf_migration_disabled() false negative on non-PREEMPT_RCU
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Merge tag 'io_uring-7.0-20260403' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
Pull io_uring fixes from Jens Axboe:
- A previous fix in this release covered the case of the rings being
RCU protected during resize, but it missed a few spots. This covers
the rest
- Fix the cBPF filters when COW'ed, introduced in this merge window
- Fix for an attempt to import a zero sized buffer
- Fix for a missing clamp in importing bundle buffers
* tag 'io_uring-7.0-20260403' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
io_uring/bpf_filters: retain COW'ed settings on parse failures
io_uring: protect remaining lockless ctx->rings accesses with RCU
io_uring/rsrc: reject zero-length fixed buffer import
io_uring/net: fix slab-out-of-bounds read in io_bundle_nbufs()
A small collection of fixes, mostly probe/remove issues that are the
result of Felix Gu going and auditing those areas, plus one error
handling fix for the Cadence QSPI driver.
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Merge tag 'spi-fix-v7.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"A small collection of fixes, mostly probe/remove issues that are the
result of Felix Gu going and auditing those areas, plus one error
handling fix for the Cadence QSPI driver"
* tag 'spi-fix-v7.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: cadence-qspi: Fix exec_mem_op error handling
spi: amlogic: spifc-a4: unregister ECC engine on probe failure and remove() callback
spi: stm32-ospi: Fix DMA channel leak on stm32_ospi_dma_setup() failure
spi: stm32-ospi: Fix reset control leak on probe error
spi: stm32-ospi: Fix resource leak in remove() callback
@p->scx.ddsp_dsq_id can be left set (non-SCX_DSQ_INVALID) triggering a
spurious warning in mark_direct_dispatch() when the next wakeup's
ops.select_cpu() calls scx_bpf_dsq_insert(), such as:
WARNING: kernel/sched/ext.c:1273 at scx_dsq_insert_commit+0xcd/0x140
The root cause is that ddsp_dsq_id was only cleared in dispatch_enqueue(),
which is not reached in all paths that consume or cancel a direct dispatch
verdict.
Fix it by clearing it at the right places:
- direct_dispatch(): cache the direct dispatch state in local variables
and clear it before dispatch_enqueue() on the synchronous path. For
the deferred path, the direct dispatch state must remain set until
process_ddsp_deferred_locals() consumes them.
- process_ddsp_deferred_locals(): cache the dispatch state in local
variables and clear it before calling dispatch_to_local_dsq(), which
may migrate the task to another rq.
- do_enqueue_task(): clear the dispatch state on the enqueue path
(local/global/bypass fallbacks), where the direct dispatch verdict is
ignored.
- dequeue_task_scx(): clear the dispatch state after dispatch_dequeue()
to handle both the deferred dispatch cancellation and the holding_cpu
race, covering all cases where a pending direct dispatch is
cancelled.
- scx_disable_task(): clear the direct dispatch state when
transitioning a task out of the current scheduler. Waking tasks may
have had the direct dispatch state set by the outgoing scheduler's
ops.select_cpu() and then been queued on a wake_list via
ttwu_queue_wakelist(), when SCX_OPS_ALLOW_QUEUED_WAKEUP is set. Such
tasks are not on the runqueue and are not iterated by scx_bypass(),
so their direct dispatch state won't be cleared. Without this clear,
any subsequent SCX scheduler that tries to direct dispatch the task
will trigger the WARN_ON_ONCE() in mark_direct_dispatch().
Fixes: 5b26f7b920 ("sched_ext: Allow SCX_DSQ_LOCAL_ON for direct dispatches")
Cc: stable@vger.kernel.org # v6.12+
Cc: Daniel Hodges <hodgesd@meta.com>
Cc: Patrick Somaru <patsomaru@meta.com>
Signed-off-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
- Fix a NULL pointer dereference in the energy model netlink
interface that may occur if a given perf domain ID is not
recognized (Changwoo Min)
- Avoid double free in the cpufreq_dbs_governor_init() error path
when kobject_init_and_add() fails (Guangshuo Li)
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Merge tag 'pm-7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix a potential NULL pointer dereference in the energy model
netlink interface and a potential double free in an error path in
the common cpufreq governor management code:
- Fix a NULL pointer dereference in the energy model netlink
interface that may occur if a given perf domain ID is not
recognized (Changwoo Min)
- Avoid double free in the cpufreq_dbs_governor_init() error
path when kobject_init_and_add() fails (Guangshuo Li)"
* tag 'pm-7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path
PM: EM: Fix NULL pointer dereference when perf domain ID is not found
Address potential races between thermal zone removal and system
resume that may lead to a use-after-free (in two different ways)
and a potential use-after-free in the thermal zone unregistration
path (Rafael Wysocki).
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Merge tag 'thermal-7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull thermal control fixes from Rafael Wysocki:
"Address potential races between thermal zone removal and system
resume that may lead to a use-after-free (in two different ways)
and a potential use-after-free in the thermal zone unregistration
path (Rafael Wysocki)"
* tag 'thermal-7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
thermal: core: Fix thermal zone device registration error path
thermal: core: Address thermal zone removal races with resume
- fix kerneldocs for gpio-timberdale and gpio-nomadik
- clear the "requested" flag in error path in gpiod_request_commit()
- call of_xlate() if provided when setting up shared GPIOs
- handle pins shared by child firmware nodes of consumer devices
- fix return value check in gpio-qixis-fpga
- fix suspend on gpio-mxc
- fix gpio-microchip DT bindings
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Merge tag 'gpio-fixes-for-v7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio fixes from Bartosz Golaszewski:
- fix kerneldocs for gpio-timberdale and gpio-nomadik
- clear the "requested" flag in error path in gpiod_request_commit()
- call of_xlate() if provided when setting up shared GPIOs
- handle pins shared by child firmware nodes of consumer devices
- fix return value check in gpio-qixis-fpga
- fix suspend on gpio-mxc
- fix gpio-microchip DT bindings
* tag 'gpio-fixes-for-v7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
dt-bindings: gpio: fix microchip #interrupt-cells
gpio: shared: shorten the critical section in gpiochip_setup_shared()
gpio: mxc: map Both Edge pad wakeup to Rising Edge
gpio: qixis-fpga: Fix error handling for devm_regmap_init_mmio()
gpio: shared: handle pins shared by child nodes of devices
gpio: shared: call gpio_chip::of_xlate() if set
gpiolib: clear requested flag if line is invalid
gpio: nomadik: repair some kernel-doc comments
gpio: timberdale: repair kernel-doc comments
gpio: Fix resource leaks on errors in gpiochip_add_data_with_key()
- Implement a basic static call trampoline to fix CFI failures with the
generic implementation.
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fix from Will Deacon:
- Implement a basic static call trampoline to fix CFI failures with the
generic implementation
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Use static call trampolines when kCFI is enabled
core:
- revert unplug/framebuffer fix as it caused problems
- compat ioctl speculation fix
bridge:
- refcounting fix
sysfb:
- error handling fix
amdgpu:
- fix renoir audio regression
- UserQ fixes
- PASID handling fix
- S4 fix for smu11 chips
- Misc small fixes
amdkfd:
- Non-4K page fixes
i915:
- Fix for #12045: Huawei Matebook E (DRR-WXX): Persistent Black Screen on Boot with i915 and Gen11: Modesetting and Backlight Control Malfunction
- Fix for #15826: i915: Raptor Lake-P [UHD Graphics] display flicker/corruption on eDP panel
- Use crtc_state->enhanced_framing properly on ivb/hsw CPU eDP
xe:
- uapi: Accept canonical GPU addresses in xe_vm_madvise_ioctl
- Disallow writes to read-only VMAs
- PXP fixes
- Disable garbage collector work item on SVM close
- void memory allocations in xe_device_declare_wedged
qaic:
- hang fix
ast:
- initialisation fix
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Merge tag 'drm-fixes-2026-04-03' of https://gitlab.freedesktop.org/drm/kernel
Pull drm fixes from Dave Airlie:
"Hopefully no Easter eggs in this bunch of fixes. Usual stuff across
the amd/intel with some misc bits. Thanks to Thorsten and Alex for
making sure a regression fix that was hanging around in process land
finally made it in, that is probably the biggest change in here.
core:
- revert unplug/framebuffer fix as it caused problems
- compat ioctl speculation fix
bridge:
- refcounting fix
sysfb:
- error handling fix
amdgpu:
- fix renoir audio regression
- UserQ fixes
- PASID handling fix
- S4 fix for smu11 chips
- Misc small fixes
amdkfd:
- Non-4K page fixes
i915:
- Fix for #12045: Huawei Matebook E (DRR-WXX): Persistent Black
Screen on Boot with i915 and Gen11: Modesetting and Backlight
Control Malfunction
- Fix for #15826: i915: Raptor Lake-P [UHD Graphics] display
flicker/corruption on eDP panel
- Use crtc_state->enhanced_framing properly on ivb/hsw CPU eDP
xe:
- uapi: Accept canonical GPU addresses in xe_vm_madvise_ioctl
- Disallow writes to read-only VMAs
- PXP fixes
- Disable garbage collector work item on SVM close
- void memory allocations in xe_device_declare_wedged
qaic:
- hang fix
ast:
- initialisation fix"
* tag 'drm-fixes-2026-04-03' of https://gitlab.freedesktop.org/drm/kernel: (28 commits)
drm/amd/display: Wire up dcn10_dio_construct() for all pre-DCN401 generations
drm/ioc32: stop speculation on the drm_compat_ioctl path
drm/sysfb: Fix efidrm error handling and memory type mismatch
drm/i915/dp: Use crtc_state->enhanced_framing properly on ivb/hsw CPU eDP
drm/i915/cdclk: Do the full CDCLK dance for min_voltage_level changes
drm/amdkfd: Fix queue preemption/eviction failures by aligning control stack size to GPU page size
drm/amdgpu: Fix wait after reset sequence in S4
drm/amd/display: Fix NULL pointer dereference in dcn401_init_hw()
drm/amdgpu: Change AMDGPU_VA_RESERVED_TRAP_SIZE to 64KB
drm/amdgpu/userq: fix memory leak in MQD creation error paths
drm/amd: Fix MQD and control stack alignment for non-4K
drm/amdkfd: Align expected_queue_size to PAGE_SIZE
drm/amdgpu: fix the idr allocation flags
drm/amdgpu: validate doorbell_offset in user queue creation
drm/amdgpu/pm: drop SMU driver if version not matched messages
drm/xe: Avoid memory allocations in xe_device_declare_wedged()
drm/xe: Disable garbage collector work item on SVM close
drm/xe/pxp: Don't allow PXP on older PTL GSC FWs
drm/xe/pxp: Clear restart flag in pxp_start after jumping back
drm/xe/pxp: Remove incorrect handling of impossible state during suspend
...
Fix a NULL pointer dereference in the energy model netlink interface
that may occur if a given perf domain ID is not recognized (Changwoo Min).
* pm-em:
PM: EM: Fix NULL pointer dereference when perf domain ID is not found
A significant part of the effort of the security team consists in begging
reporters for patch proposals, or asking them to provide them in regular
format, and most of the time they're willing to provide this, they just
didn't know that it would help. So let's add a section detailing the
required and desirable contents in a security report to help reporters
write more actionable reports which do not require round trips.
Cc: Eric Dumazet <edumazet@google.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Link: https://patch.msgid.link/20260403062018.31080-4-w@1wt.eu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
These days, 80% of the work done by the security team consists in
locating the affected subsystem in a report, running get_maintainers on
it, forwarding the report to these persons and responding to the reporter
with them in Cc. This is a huge and unneeded overhead that we must try to
lower for a better overall efficiency. This patch adds a complete section
explaining how to figure the list of recipients to send the report to.
Cc: Eric Dumazet <edumazet@google.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Link: https://patch.msgid.link/20260403062018.31080-3-w@1wt.eu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This clarifies the fact that the bug reporters must use a valid
e-mail address to send their report, and that the security team
assists developers working on a fix but doesn't always produce
fixes on its own.
Cc: Eric Dumazet <edumazet@google.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Link: https://patch.msgid.link/20260403062018.31080-2-w@1wt.eu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
use-after-free fix that turned out to be causing more problems, a hang
fix for qaic, an initialization fix for ast, a error handling fix for
sysfb, and a speculation fix for drm_compat_ioctl.
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Merge tag 'drm-misc-fixes-2026-04-02' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes
A refcounting fix for bridges, revert a previous framebuffer
use-after-free fix that turned out to be causing more problems, a hang
fix for qaic, an initialization fix for ast, a error handling fix for
sysfb, and a speculation fix for drm_compat_ioctl.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <mripard@redhat.com>
Link: https://patch.msgid.link/20260402-vivid-perfect-caiman-ca055e@houat
Changes for v7.1
CI:
- Uprev mesa
- Restore CI jobs for Qualcomm APQ8016 and APQ8096 devices
Core:
- Switched to of_get_available_child_by_name()
DPU:
- Fixes for DSC panels
- Fixed brownout because of the frequency / OPP mismatch
- Quad pipe preparation (not enabled yet)
- Switched to virtual planes by default
- Dropped VBIF_NRT support
- Added support for Eliza platform
- Reworked alpha handling
- Switched to correct CWB definitions on Eliza
- Dropped dummy INTF_0 on MSM8953
- Corrected INTFs related to DP-MST
DP:
- Removed debug prints looking into PHY internals
DSI:
- Fixes for DSC panels
- RGB101010 support
- Support for SC8280XP
- Moved PHY bindings from display/ to phy/
GPU:
- Preemption support for x2-85 and a840
- IFPC support for a840
- SKU detection support for x2-85 and a840
- Expose AQE support (VK ray-pipeline)
- Avoid locking in VM_BIND fence signaling path
- Fix to avoid reclaim in GPU snapshot path
- Disallow foreign mapping of _NO_SHARE BOs
- Couple a6xx gpu snapshot fixes
- Various other fixes
HDMI:
- Fixed infoframes programming
MDP5:
- Dropped support for MSM8974v1
- Dropped now unused code for MSM8974 v1 and SDM660 / MSM8998
Also misc small fixes
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rob Clark <rob.clark@oss.qualcomm.com>
Link: https://patch.msgid.link/CACSVV012vn73BaUfk=Hw4WkQHZNPHiqfifWEunAqMc2EGOWUEQ@mail.gmail.com
- Fix for #12045: Huawei Matebook E (DRR-WXX): Persistent Black Screen on Boot with i915 and Gen11: Modesetting and Backlight Control Malfunction
- Fix for #15826: i915: Raptor Lake-P [UHD Graphics] display flicker/corruption on eDP panel
- Use crtc_state->enhanced_framing properly on ivb/hsw CPU eDP
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patch.msgid.link/ac5DM1IpBkuaT58e@jlahtine-mobl
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Merge tag 'v7.0-rc6-smb3-client-fix' of git://git.samba.org/sfrench/cifs-2.6
Pull smb client fix from Steve French:
- Fix potential out of bounds read in mount
* tag 'v7.0-rc6-smb3-client-fix' of git://git.samba.org/sfrench/cifs-2.6:
fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath
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Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Pull bpf fixes from Alexei Starovoitov:
- Fix register equivalence for pointers to packet (Alexei Starovoitov)
- Fix incorrect pruning due to atomic fetch precision tracking (Daniel
Borkmann)
- Fix grace period wait for bpf_link-ed tracepoints (Kumar Kartikeya
Dwivedi)
- Fix use-after-free of sockmap's sk->sk_socket (Kuniyuki Iwashima)
- Reject direct access to nullable PTR_TO_BUF pointers (Qi Tang)
- Reject sleepable kprobe_multi programs at attach time (Varun R
Mallya)
* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
selftests/bpf: Add more precision tracking tests for atomics
bpf: Fix incorrect pruning due to atomic fetch precision tracking
bpf: Reject sleepable kprobe_multi programs at attach time
bpf: reject direct access to nullable PTR_TO_BUF pointers
bpf: sockmap: Fix use-after-free of sk->sk_socket in sk_psock_verdict_data_ready().
bpf: Fix grace period wait for tracepoint bpf_link
bpf: Fix regsafe() for pointers to packet
- Add missing async markers to tegra.
- Fix long hmac key DMA handling in caam.
- Fix spurious ENOSPC errors in deflate.
- Fix SG chaining in af_alg.
- Do not use in-place process in algif_aead.
- Fix out-of-place destination overflow in authencesn.
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Merge tag 'v7.0-p4' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
- Add missing async markers to tegra
- Fix long hmac key DMA handling in caam
- Fix spurious ENOSPC errors in deflate
- Fix SG chaining in af_alg
- Do not use in-place process in algif_aead
- Fix out-of-place destination overflow in authencesn
* tag 'v7.0-p4' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption
crypto: algif_aead - Revert to operating out-of-place
crypto: af-alg - fix NULL pointer dereference in scatterwalk
crypto: deflate - fix spurious -ENOSPC
crypto: caam - fix overflow on long hmac keys
crypto: caam - fix DMA corruption on long hmac keys
crypto: tegra - Add missing CRYPTO_ALG_ASYNC
Since commit 8e4f0b1ebc ("bpf: use rcu_read_lock_dont_migrate() for
trampoline.c"), the BPF prolog (__bpf_prog_enter) calls migrate_disable()
only when CONFIG_PREEMPT_RCU is enabled, via rcu_read_lock_dont_migrate().
Without CONFIG_PREEMPT_RCU, the prolog never touches migration_disabled,
so migration_disabled == 1 always means the task is truly
migration-disabled regardless of whether it is the current task.
The old unconditional p == current check was a false negative in this
case, potentially allowing a migration-disabled task to be dispatched to
a remote CPU and triggering scx_error in task_can_run_on_remote_rq().
Only apply the p == current disambiguation when CONFIG_PREEMPT_RCU is
enabled, where the ambiguity with the BPF prolog still exists.
Fixes: 8e4f0b1ebc ("bpf: use rcu_read_lock_dont_migrate() for trampoline.c")
Cc: stable@vger.kernel.org # v6.18+
Link: https://lore.kernel.org/lkml/20250821090609.42508-8-dongml2@chinatelecom.cn/
Signed-off-by: Changwoo Min <changwoo@igalia.com>
Reviewed-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Description:
- Commit b82f075934 ("drm/amd/display: Migrate DIO registers access
from hwseq to dio component") moved DIO_MEM_PWR_CTRL register access
behind the new dio abstraction layer but only created the dio object for
DCN 4.01. On all other generations (DCN 10/20/21/201/30/301/302/303/
31/314/315/316/32/321/35/351/36), the dio pointer is NULL, causing the
register write to be silently skipped.
This results in AFMT HDMI memory not being powered on during init_hw,
which can cause HDMI audio failures and display issues on affected
hardware including Renoir/Cezanne (DCN 2.1) APUs that use dcn10_init_hw.
Call dcn10_dio_construct() in each older DCN generation's resource.c
to create the dio object, following the same pattern as DCN 4.01. This
ensures the dio pointer is non-NULL and the mem_pwr_ctrl callback works
through the dio abstraction for all DCN generations.
Fixes: b82f075934 ("drm/amd/display: Migrate DIO registers access from hwseq to dio component.")
Reviewed-by: Ivan Lipski <ivan.lipski@amd.com>
Signed-off-by: Ionut Nechita <ionut_n2001@yahoo.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Merge tag 'v7.0-rc6-ksmbd-server-fix' of git://git.samba.org/ksmbd
Pull smb server fix from Steve French:
- Fix out of bound write
* tag 'v7.0-rc6-ksmbd-server-fix' of git://git.samba.org/ksmbd:
ksmbd: fix OOB write in QUERY_INFO for compound requests
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Merge tag 'for-7.0-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fix from David Sterba:
"One more fix for a potential extent tree corruption due to an
unexpected error value.
When the search for an extent item failed, it under some circumstances
was reported as a success to the caller"
* tag 'for-7.0-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: fix incorrect return value after changing leaf in lookup_extent_data_ref()
Add verifier precision tracking tests for BPF atomic fetch operations.
Validate that backtrack_insn correctly propagates precision from the
fetch dst_reg to the stack slot for {fetch_add,xchg,cmpxchg} atomics.
For the first two src_reg gets the old memory value, and for the last
one r0. The fetched register is used for pointer arithmetic to trigger
backtracking. Also add coverage for fetch_{or,and,xor} flavors which
exercises the bitwise atomic fetch variants going through the same
insn->imm & BPF_FETCH check but with different imm values.
Add dual-precision regression tests for fetch_add and cmpxchg where
both the fetched value and a reread of the same stack slot are tracked
for precision. After the atomic operation, the stack slot is STACK_MISC,
so the ldx does not set INSN_F_STACK_ACCESS. These tests verify that
stack precision propagates solely through the atomic fetch's load side.
Add map-based tests for fetch_add and cmpxchg which validate that non-
stack atomic fetch completes precision tracking without falling back
to mark_all_scalars_precise. Lastly, add 32-bit variants for {fetch_add,
cmpxchg} on map values to cover the second valid atomic operand size.
# LDLIBS=-static PKG_CONFIG='pkg-config --static' ./vmtest.sh -- ./test_progs -t verifier_precision
[...]
+ /etc/rcS.d/S50-startup
./test_progs -t verifier_precision
[ 1.697105] bpf_testmod: loading out-of-tree module taints kernel.
[ 1.700220] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
[ 1.777043] tsc: Refined TSC clocksource calibration: 3407.986 MHz
[ 1.777619] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fc6d7268, max_idle_ns: 440795260133 ns
[ 1.778658] clocksource: Switched to clocksource tsc
#633/1 verifier_precision/bpf_neg:OK
#633/2 verifier_precision/bpf_end_to_le:OK
#633/3 verifier_precision/bpf_end_to_be:OK
#633/4 verifier_precision/bpf_end_bswap:OK
#633/5 verifier_precision/bpf_load_acquire:OK
#633/6 verifier_precision/bpf_store_release:OK
#633/7 verifier_precision/state_loop_first_last_equal:OK
#633/8 verifier_precision/bpf_cond_op_r10:OK
#633/9 verifier_precision/bpf_cond_op_not_r10:OK
#633/10 verifier_precision/bpf_atomic_fetch_add_precision:OK
#633/11 verifier_precision/bpf_atomic_xchg_precision:OK
#633/12 verifier_precision/bpf_atomic_fetch_or_precision:OK
#633/13 verifier_precision/bpf_atomic_fetch_and_precision:OK
#633/14 verifier_precision/bpf_atomic_fetch_xor_precision:OK
#633/15 verifier_precision/bpf_atomic_cmpxchg_precision:OK
#633/16 verifier_precision/bpf_atomic_fetch_add_dual_precision:OK
#633/17 verifier_precision/bpf_atomic_cmpxchg_dual_precision:OK
#633/18 verifier_precision/bpf_atomic_fetch_add_map_precision:OK
#633/19 verifier_precision/bpf_atomic_cmpxchg_map_precision:OK
#633/20 verifier_precision/bpf_atomic_fetch_add_32bit_precision:OK
#633/21 verifier_precision/bpf_atomic_cmpxchg_32bit_precision:OK
#633/22 verifier_precision/bpf_neg_2:OK
#633/23 verifier_precision/bpf_neg_3:OK
#633/24 verifier_precision/bpf_neg_4:OK
#633/25 verifier_precision/bpf_neg_5:OK
#633 verifier_precision:OK
Summary: 1/25 PASSED, 0 SKIPPED, 0 FAILED
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/r/20260331222020.401848-2-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
When backtrack_insn encounters a BPF_STX instruction with BPF_ATOMIC
and BPF_FETCH, the src register (or r0 for BPF_CMPXCHG) also acts as
a destination, thus receiving the old value from the memory location.
The current backtracking logic does not account for this. It treats
atomic fetch operations the same as regular stores where the src
register is only an input. This leads the backtrack_insn to fail to
propagate precision to the stack location, which is then not marked
as precise!
Later, the verifier's path pruning can incorrectly consider two states
equivalent when they differ in terms of stack state. Meaning, two
branches can be treated as equivalent and thus get pruned when they
should not be seen as such.
Fix it as follows: Extend the BPF_LDX handling in backtrack_insn to
also cover atomic fetch operations via is_atomic_fetch_insn() helper.
When the fetch dst register is being tracked for precision, clear it,
and propagate precision over to the stack slot. For non-stack memory,
the precision walk stops at the atomic instruction, same as regular
BPF_LDX. This covers all fetch variants.
Before:
0: (b7) r1 = 8 ; R1=8
1: (7b) *(u64 *)(r10 -8) = r1 ; R1=8 R10=fp0 fp-8=8
2: (b7) r2 = 0 ; R2=0
3: (db) r2 = atomic64_fetch_add((u64 *)(r10 -8), r2) ; R2=8 R10=fp0 fp-8=mmmmmmmm
4: (bf) r3 = r10 ; R3=fp0 R10=fp0
5: (0f) r3 += r2
mark_precise: frame0: last_idx 5 first_idx 0 subseq_idx -1
mark_precise: frame0: regs=r2 stack= before 4: (bf) r3 = r10
mark_precise: frame0: regs=r2 stack= before 3: (db) r2 = atomic64_fetch_add((u64 *)(r10 -8), r2)
mark_precise: frame0: regs=r2 stack= before 2: (b7) r2 = 0
6: R2=8 R3=fp8
6: (b7) r0 = 0 ; R0=0
7: (95) exit
After:
0: (b7) r1 = 8 ; R1=8
1: (7b) *(u64 *)(r10 -8) = r1 ; R1=8 R10=fp0 fp-8=8
2: (b7) r2 = 0 ; R2=0
3: (db) r2 = atomic64_fetch_add((u64 *)(r10 -8), r2) ; R2=8 R10=fp0 fp-8=mmmmmmmm
4: (bf) r3 = r10 ; R3=fp0 R10=fp0
5: (0f) r3 += r2
mark_precise: frame0: last_idx 5 first_idx 0 subseq_idx -1
mark_precise: frame0: regs=r2 stack= before 4: (bf) r3 = r10
mark_precise: frame0: regs=r2 stack= before 3: (db) r2 = atomic64_fetch_add((u64 *)(r10 -8), r2)
mark_precise: frame0: regs= stack=-8 before 2: (b7) r2 = 0
mark_precise: frame0: regs= stack=-8 before 1: (7b) *(u64 *)(r10 -8) = r1
mark_precise: frame0: regs=r1 stack= before 0: (b7) r1 = 8
6: R2=8 R3=fp8
6: (b7) r0 = 0 ; R0=0
7: (95) exit
Fixes: 5ffa25502b ("bpf: Add instructions for atomic_[cmp]xchg")
Fixes: 5ca419f286 ("bpf: Add BPF_FETCH field / create atomic_fetch_add instruction")
Reported-by: STAR Labs SG <info@starlabs.sg>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/r/20260331222020.401848-1-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
to each PR carrying 30%+ more fixes than in previous era. The good
news is that so far none of the "extra" fixes are themselves
causing real regressions. Not sure how much comfort that is.
Current release - fix to a fix:
- netdevsim: fix build if SKB_EXTENSIONS=n
- eth: stmmac: skip VLAN restore when VLAN hash ops are missing
Previous releases - regressions:
- wifi: iwlwifi: mvm: don't send a 6E related command when
not supported
Previous releases - always broken:
- some info leak fixes
- add missing clearing of skb->cb[] on ICMP paths from tunnels
- ipv6: flowlabel: defer exclusive option free until RCU teardown
- ipv6: avoid overflows in ip6_datagram_send_ctl()
- mpls: add seqcount to protect platform_labels from OOB access
- bridge: improve safety of parsing ND options
- Bluetooth: fix leaks, overflows and races in hci_sync
- netfilter: add more input validation, some to address bugs directly
some to prevent exploits from cooking up broken configurations
- wifi: ath: avoid poor performance due to stopping the wrong
aggregation session
- wifi: virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free
- eth: fec: fix the PTP periodic output sysfs interface
- eth: enetc: safely reinitialize TX BD ring when it has unsent frames
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"With fixes from wireless, bluetooth and netfilter included we're back
to each PR carrying 30%+ more fixes than in previous era.
The good news is that so far none of the "extra" fixes are themselves
causing real regressions. Not sure how much comfort that is.
Current release - fix to a fix:
- netdevsim: fix build if SKB_EXTENSIONS=n
- eth: stmmac: skip VLAN restore when VLAN hash ops are missing
Previous releases - regressions:
- wifi: iwlwifi: mvm: don't send a 6E related command when
not supported
Previous releases - always broken:
- some info leak fixes
- add missing clearing of skb->cb[] on ICMP paths from tunnels
- ipv6:
- flowlabel: defer exclusive option free until RCU teardown
- avoid overflows in ip6_datagram_send_ctl()
- mpls: add seqcount to protect platform_labels from OOB access
- bridge: improve safety of parsing ND options
- bluetooth: fix leaks, overflows and races in hci_sync
- netfilter: add more input validation, some to address bugs directly
some to prevent exploits from cooking up broken configurations
- wifi:
- ath: avoid poor performance due to stopping the wrong
aggregation session
- virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free
- eth:
- fec: fix the PTP periodic output sysfs interface
- enetc: safely reinitialize TX BD ring when it has unsent frames"
* tag 'net-7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (95 commits)
eth: fbnic: Increase FBNIC_QUEUE_SIZE_MIN to 64
ipv6: avoid overflows in ip6_datagram_send_ctl()
net: hsr: fix VLAN add unwind on slave errors
net: hsr: serialize seq_blocks merge across nodes
vsock: initialize child_ns_mode_locked in vsock_net_init()
selftests/tc-testing: add tests for cls_fw and cls_flow on shared blocks
net/sched: cls_flow: fix NULL pointer dereference on shared blocks
net/sched: cls_fw: fix NULL pointer dereference on shared blocks
net/x25: Fix overflow when accumulating packets
net/x25: Fix potential double free of skb
bnxt_en: Restore default stat ctxs for ULP when resource is available
bnxt_en: Don't assume XDP is never enabled in bnxt_init_dflt_ring_mode()
bnxt_en: Refactor some basic ring setup and adjustment logic
net/mlx5: Fix switchdev mode rollback in case of failure
net/mlx5: Avoid "No data available" when FW version queries fail
net/mlx5: lag: Check for LAG device before creating debugfs
net: macb: properly unregister fixed rate clocks
net: macb: fix clk handling on PCI glue driver removal
virtio_net: clamp rss_max_key_size to NETDEV_RSS_KEY_LEN
net/sched: sch_netem: fix out-of-bounds access in packet corruption
...
Including:
- IOMMU-PT related compile breakage in for AMD driver.
- IOTLB flushing behavior when unmapped region is larger than requested
due to page-sizes.
- Fix IOTLB flush behavior with empty gathers.
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Merge tag 'iommu-fixes-v7.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux
Pull iommu fixes from Joerg Roedel:
- IOMMU-PT related compile breakage in for AMD driver
- IOTLB flushing behavior when unmapped region is larger than requested
due to page-sizes
- Fix IOTLB flush behavior with empty gathers
* tag 'iommu-fixes-v7.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux:
iommupt/amdv1: mark amdv1pt_install_leaf_entry as __always_inline
iommupt: Fix short gather if the unmap goes into a large mapping
iommu: Do not call drivers for empty gathers
kprobe.multi programs run in atomic/RCU context and cannot sleep.
However, bpf_kprobe_multi_link_attach() did not validate whether the
program being attached had the sleepable flag set, allowing sleepable
helpers such as bpf_copy_from_user() to be invoked from a non-sleepable
context.
This causes a "sleeping function called from invalid context" splat:
BUG: sleeping function called from invalid context at ./include/linux/uaccess.h:169
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1787, name: sudo
preempt_count: 1, expected: 0
RCU nest depth: 2, expected: 0
Fix this by rejecting sleepable programs early in
bpf_kprobe_multi_link_attach(), before any further processing.
Fixes: 0dcac27254 ("bpf: Add multi kprobe link")
Signed-off-by: Varun R Mallya <varunrmallya@gmail.com>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Leon Hwang <leon.hwang@linux.dev>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20260401191126.440683-1-varunrmallya@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
check_mem_access() matches PTR_TO_BUF via base_type() which strips
PTR_MAYBE_NULL, allowing direct dereference without a null check.
Map iterator ctx->key and ctx->value are PTR_TO_BUF | PTR_MAYBE_NULL.
On stop callbacks these are NULL, causing a kernel NULL dereference.
Add a type_may_be_null() guard to the PTR_TO_BUF branch, matching the
existing PTR_TO_BTF_ID pattern.
Fixes: 20b2aff4bc ("bpf: Introduce MEM_RDONLY flag")
Signed-off-by: Qi Tang <tpluszz77@gmail.com>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260402092923.38357-2-tpluszz77@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
people have been so busy for hunting and we're still getting a
more amount of changes than wished, but it doesn't look too scaring;
almost all changes are device-specific small fixes.
I guess it's rather a casual bump, and no more Easter eggs are left
for 7.0 (hopefully)...
- Fixes for the recent regression on ctxfi driver
- Fix missing INIT_LIST_HEAD() for ASoC card_aux_list
- Usual HD- and USB-audio, and ASoC AMD quirk updates
- ASoC fixes for AMD and Intel
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Merge tag 'sound-7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"People have been so busy for hunting and we're still getting more
changes than wished for, but it doesn't look too scary; almost all
changes are device-specific small fixes.
I guess it's rather a casual bump, and no more Easter eggs are left
for 7.0 (hopefully)...
- Fixes for the recent regression on ctxfi driver
- Fix missing INIT_LIST_HEAD() for ASoC card_aux_list
- Usual HD- and USB-audio, and ASoC AMD quirk updates
- ASoC fixes for AMD and Intel"
* tag 'sound-7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (24 commits)
ASoC: amd: ps: Fix missing leading zeros in subsystem_device SSID log
ALSA: usb-audio: Exclude Scarlett 2i2 1st Gen (8016) from SKIP_IFACE_SETUP
ALSA: hda/realtek: add quirk for Acer Swift SFG14-73
ALSA: hda/realtek: Add quirk for Lenovo Yoga Pro 7 14IMH9
ASoC: Intel: boards: fix unmet dependency on PINCTRL
ASoC: Intel: ehl_rt5660: Use the correct rtd->dev device in hw_params
ALSA: ctxfi: Don't enumerate SPDIF1 at DAIO initialization
ALSA: hda/realtek: Add quirk for Lenovo Yoga Slim 7 14AKP10
ALSA: hda/realtek: add quirk for HP Laptop 15-fc0xxx
ASoC: ep93xx: Fix unchecked clk_prepare_enable() and add rollback on failure
ASoC: soc-core: call missing INIT_LIST_HEAD() for card_aux_list
ALSA: hda/realtek: Add quirk for Samsung Book2 Pro 360 (NP950QED)
ASoC: amd: yc: Add DMI entry for HP Laptop 15-fc0xxx
ASoC: amd: yc: Add DMI quirk for ASUS Vivobook Pro 16X OLED M7601RM
ALSA: hda/realtek: Add quirk for ASUS ROG Strix SCAR 15
ALSA: usb-audio: Exclude Scarlett Solo 1st Gen from SKIP_IFACE_SETUP
ALSA: caiaq: fix stack out-of-bounds read in init_card
ALSA: ctxfi: Check the error for index mapping
ALSA: ctxfi: Fix missing SPDIFI1 index handling
ALSA: hda/realtek: add quirk for HP Victus 15-fb0xxx
...
On systems with 64K pages, RX queues will be wedged if users set the
descriptor count to the current minimum (16). Fbnic fragments large
pages into 4K chunks, and scales down the ring size accordingly. With
64K pages and 16 descriptors, the ring size mask is 0 and will never
be filled.
32 descriptors is another special case that wedges the RX rings.
Internally, the rings track pages for the head/tail pointers, not page
fragments. So with 32 descriptors, there's only 1 usable page as one
ring slot is kept empty to disambiguate between an empty/full ring.
As a result, the head pointer never advances and the HW stalls after
consuming 16 page fragments.
Fixes: 0cb4c0a137 ("eth: fbnic: Implement Rx queue alloc/start/stop/free")
Signed-off-by: Dimitri Daskalakis <daskald@meta.com>
Link: https://patch.msgid.link/20260401162848.2335350-1-dimitri.daskalakis1@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Yiming Qian reported :
<quote>
I believe I found a locally triggerable kernel bug in the IPv6 sendmsg
ancillary-data path that can panic the kernel via `skb_under_panic()`
(local DoS).
The core issue is a mismatch between:
- a 16-bit length accumulator (`struct ipv6_txoptions::opt_flen`, type
`__u16`) and
- a pointer to the *last* provided destination-options header (`opt->dst1opt`)
when multiple `IPV6_DSTOPTS` control messages (cmsgs) are provided.
- `include/net/ipv6.h`:
- `struct ipv6_txoptions::opt_flen` is `__u16` (wrap possible).
(lines 291-307, especially 298)
- `net/ipv6/datagram.c:ip6_datagram_send_ctl()`:
- Accepts repeated `IPV6_DSTOPTS` and accumulates into `opt_flen`
without rejecting duplicates. (lines 909-933)
- `net/ipv6/ip6_output.c:__ip6_append_data()`:
- Uses `opt->opt_flen + opt->opt_nflen` to compute header
sizes/headroom decisions. (lines 1448-1466, especially 1463-1465)
- `net/ipv6/ip6_output.c:__ip6_make_skb()`:
- Calls `ipv6_push_frag_opts()` if `opt->opt_flen` is non-zero.
(lines 1930-1934)
- `net/ipv6/exthdrs.c:ipv6_push_frag_opts()` / `ipv6_push_exthdr()`:
- Push size comes from `ipv6_optlen(opt->dst1opt)` (based on the
pointed-to header). (lines 1179-1185 and 1206-1211)
1. `opt_flen` is a 16-bit accumulator:
- `include/net/ipv6.h:298` defines `__u16 opt_flen; /* after fragment hdr */`.
2. `ip6_datagram_send_ctl()` accepts *repeated* `IPV6_DSTOPTS` cmsgs
and increments `opt_flen` each time:
- In `net/ipv6/datagram.c:909-933`, for `IPV6_DSTOPTS`:
- It computes `len = ((hdr->hdrlen + 1) << 3);`
- It checks `CAP_NET_RAW` using `ns_capable(net->user_ns,
CAP_NET_RAW)`. (line 922)
- Then it does:
- `opt->opt_flen += len;` (line 927)
- `opt->dst1opt = hdr;` (line 928)
There is no duplicate rejection here (unlike the legacy
`IPV6_2292DSTOPTS` path which rejects duplicates at
`net/ipv6/datagram.c:901-904`).
If enough large `IPV6_DSTOPTS` cmsgs are provided, `opt_flen` wraps
while `dst1opt` still points to a large (2048-byte)
destination-options header.
In the attached PoC (`poc.c`):
- 32 cmsgs with `hdrlen=255` => `len = (255+1)*8 = 2048`
- 1 cmsg with `hdrlen=0` => `len = 8`
- Total increment: `32*2048 + 8 = 65544`, so `(__u16)opt_flen == 8`
- The last cmsg is 2048 bytes, so `dst1opt` points to a 2048-byte header.
3. The transmit path sizes headers using the wrapped `opt_flen`:
- In `net/ipv6/ip6_output.c:1463-1465`:
- `headersize = sizeof(struct ipv6hdr) + (opt ? opt->opt_flen +
opt->opt_nflen : 0) + ...;`
With wrapped `opt_flen`, `headersize`/headroom decisions underestimate
what will be pushed later.
4. When building the final skb, the actual push length comes from
`dst1opt` and is not limited by wrapped `opt_flen`:
- In `net/ipv6/ip6_output.c:1930-1934`:
- `if (opt->opt_flen) proto = ipv6_push_frag_opts(skb, opt, proto);`
- In `net/ipv6/exthdrs.c:1206-1211`, `ipv6_push_frag_opts()` pushes
`dst1opt` via `ipv6_push_exthdr()`.
- In `net/ipv6/exthdrs.c:1179-1184`, `ipv6_push_exthdr()` does:
- `skb_push(skb, ipv6_optlen(opt));`
- `memcpy(h, opt, ipv6_optlen(opt));`
With insufficient headroom, `skb_push()` underflows and triggers
`skb_under_panic()` -> `BUG()`:
- `net/core/skbuff.c:2669-2675` (`skb_push()` calls `skb_under_panic()`)
- `net/core/skbuff.c:207-214` (`skb_panic()` ends in `BUG()`)
- The `IPV6_DSTOPTS` cmsg path requires `CAP_NET_RAW` in the target
netns user namespace (`ns_capable(net->user_ns, CAP_NET_RAW)`).
- Root (or any task with `CAP_NET_RAW`) can trigger this without user
namespaces.
- An unprivileged `uid=1000` user can trigger this if unprivileged
user namespaces are enabled and it can create a userns+netns to obtain
namespaced `CAP_NET_RAW` (the attached PoC does this).
- Local denial of service: kernel BUG/panic (system crash).
- Reproducible with a small userspace PoC.
</quote>
This patch does not reject duplicated options, as this might break
some user applications.
Instead, it makes sure to adjust opt_flen and opt_nflen to correctly
reflect the size of the current option headers, preventing the overflows
and the potential for panics.
This applies to IPV6_DSTOPTS, IPV6_HOPOPTS, and IPV6_RTHDR.
Specifically:
When a new IPV6_DSTOPTS is processed, the length of the old opt->dst1opt
is subtracted from opt->opt_flen before adding the new length.
When a new IPV6_HOPOPTS is processed, the length of the old opt->dst0opt
is subtracted from opt->opt_nflen.
When a new Routing Header (IPV6_RTHDR or IPV6_2292RTHDR) is processed,
the length of the old opt->srcrt is subtracted from opt->opt_nflen.
In the special case within IPV6_2292RTHDR handling where dst1opt is moved
to dst0opt, the length of the old opt->dst0opt is subtracted from
opt->opt_nflen before the new one is added.
Fixes: 333fad5364 ("[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).")
Reported-by: Yiming Qian <yimingqian591@gmail.com>
Closes: https://lore.kernel.org/netdev/CAL_bE8JNzawgr5OX5m+3jnQDHry2XxhQT5=jThW1zDPtUikRYA@mail.gmail.com/
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260401154721.3740056-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Luka Gejak says:
====================
net: hsr: fixes for PRP duplication and VLAN unwind
This series addresses two logic bugs in the HSR/PRP implementation
identified during a protocol audit. These are targeted for the 'net'
tree as they fix potential memory corruption and state inconsistency.
The primary change resolves a race condition in the node merging path by
implementing address-based lock ordering. This ensures that concurrent
mutations of sequence blocks do not lead to state corruption or
deadlocks.
An additional fix corrects asymmetric VLAN error unwinding by
implementing a centralized unwind path on slave errors.
====================
Link: https://patch.msgid.link/20260401092243.52121-1-luka.gejak@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When vlan_vid_add() fails for a secondary slave, the error path calls
vlan_vid_del() on the failing port instead of the peer slave that had
already succeeded. This results in asymmetric VLAN state across the HSR
pair.
Fix this by switching to a centralized unwind path that removes the VID
from any slave device that was already programmed.
Fixes: 1a8a63a530 ("net: hsr: Add VLAN CTAG filter support")
Signed-off-by: Luka Gejak <luka.gejak@linux.dev>
Link: https://patch.msgid.link/20260401092243.52121-3-luka.gejak@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
During node merging, hsr_handle_sup_frame() walks node_curr->seq_blocks
to update node_real without holding node_curr->seq_out_lock. This
allows concurrent mutations from duplicate registration paths, risking
inconsistent state or XArray/bitmap corruption.
Fix this by locking both nodes' seq_out_lock during the merge.
To prevent ABBA deadlocks, locks are acquired in order of memory
address.
Reviewed-by: Felix Maurer <fmaurer@redhat.com>
Fixes: 415e636751 ("hsr: Implement more robust duplicate discard for PRP")
Signed-off-by: Luka Gejak <luka.gejak@linux.dev>
Link: https://patch.msgid.link/20260401092243.52121-2-luka.gejak@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The `child_ns_mode_locked` field lives in `struct net`, which persists
across vsock module reloads. When the module is unloaded and reloaded,
`vsock_net_init()` resets `mode` and `child_ns_mode` back to their
default values, but does not reset `child_ns_mode_locked`.
The stale lock from the previous module load causes subsequent writes
to `child_ns_mode` to silently fail: `vsock_net_set_child_mode()` sees
the old lock, skips updating the actual value, and returns success
when the requested mode matches the stale lock. The sysctl handler
reports no error, but `child_ns_mode` remains unchanged.
Steps to reproduce:
$ modprobe vsock
$ echo local > /proc/sys/net/vsock/child_ns_mode
$ cat /proc/sys/net/vsock/child_ns_mode
local
$ modprobe -r vsock
$ modprobe vsock
$ echo local > /proc/sys/net/vsock/child_ns_mode
$ cat /proc/sys/net/vsock/child_ns_mode
global <--- expected "local"
Fix this by initializing `child_ns_mode_locked` to 0 (unlocked) in
`vsock_net_init()`, so the write-once mechanism works correctly after
module reload.
Fixes: 102eab95f0 ("vsock: lock down child_ns_mode as write-once")
Reported-by: Jin Liu <jinl@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Bobby Eshleman <bobbyeshleman@meta.com>
Link: https://patch.msgid.link/20260401092153.28462-1-sgarzare@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Buffer size used in dma allocation and memcpy is wrong.
It can lead to undersized DMA buffer access and possible
memory corruption. use correct buffer size in dma_alloc_coherent
and memcpy.
Fixes: 737c0c8d07 ("nvmem: zynqmp_nvmem: Add support to access efuse")
Cc: stable@vger.kernel.org
Signed-off-by: Ivan Vera <ivanverasantos@gmail.com>
Signed-off-by: Harish Ediga <harish.ediga@amd.com>
Signed-off-by: Harsh Jain <h.jain@amd.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20260327131645.3025781-3-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Avoid getting error messages at startup like the following on i.MX6ULL:
nvmem imx-ocotp0: cell mac-addr raw len 6 unaligned to nvmem word size 4
nvmem imx-ocotp0: cell mac-addr raw len 6 unaligned to nvmem word size 4
This shouldn't cause any functional change as this alignment would
otherwise be done in nvmem_cell_info_to_nvmem_cell_entry_nodup().
Cc: stable@vger.kernel.org
Fixes: 13bcd440f2 ("nvmem: core: verify cell's raw_len")
Signed-off-by: Christian Eggers <ceggers@arri.de>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20260327131645.3025781-2-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
