Pull hardening fixes from Kees Cook:

 - gcc plugins: Avoid Kconfig warnings with randstruct (Nathan
   Chancellor)

 - MAINTAINERS: Add security/Kconfig.hardening to hardening section
   (Nathan Chancellor)

 - MAINTAINERS: Add unsafe_memcpy() to the FORTIFY review list

* tag 'hardening-v6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  MAINTAINERS: Add security/Kconfig.hardening to hardening section
  hardening: Adjust dependencies in selection of MODVERSIONS
  MAINTAINERS: Add unsafe_memcpy() to the FORTIFY review list

Pull lsm revert from Paul Moore:
 "Here is the CONFIG_SECURITY_TOMOYO_LKM revert that we've been
  discussing this week. With near unanimous agreement that the original
  TOMOYO patches were not the right way to solve the distro problem
  Tetsuo is trying the solve, reverting is our best option at this time"

* tag 'lsm-pr-20241004' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm:
  tomoyo: revert CONFIG_SECURITY_TOMOYO_LKM support

Merge tag 'linux_kselftest-fixes-6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest fixes from Shuah Khan:
 "Fixes to build warnings, install scripts, run-time error path, and git
  status cleanups to tests:

   - devices/probe: fix for Python3 regex string syntax warnings

   - clone3: removing unused macro from clone3_cap_checkpoint_restore()

   - vDSO: fix to align getrandom states to cache line

   - core and exec: add missing executables to .gitignore files

   - rtc: change to skip test if /dev/rtc0 can't be accessed

   - timers/posix: fix warn_unused_result result in __fatal_error()

   - breakpoints: fix to detect suspend successful condition correctly

   - hid: fix to install required dependencies to run the test"

* tag 'linux_kselftest-fixes-6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests: breakpoints: use remaining time to check if suspend succeed
  kselftest/devices/probe: Fix SyntaxWarning in regex strings for Python3
  selftest: hid: add missing run-hid-tools-tests.sh
  selftests: vDSO: align getrandom states to cache line
  selftests: exec: update gitignore for load_address
  selftests: core: add unshare_test to gitignore
  clone3: clone3_cap_checkpoint_restore: remove unused MAX_PID_NS_LEVEL macro
  selftests:timers: posix_timers: Fix warn_unused_result in __fatal_error()
  selftest: rtc: Check if could access /dev/rtc0 before testing

Pull arm64 fixes from Catalin Marinas:
 "A couple of build/config issues and expanding the speculative SSBS
  workaround to more CPUs:

   - Expand the speculative SSBS workaround to cover Cortex-A715,
     Neoverse-N3 and Microsoft Azure Cobalt 100

   - Force position-independent veneers - in some kernel configurations,
     the LLD linker generates position-dependent veneers for otherwise
     position-independent code, resulting in early boot-time failures

   - Fix Kconfig selection of HAVE_DYNAMIC_FTRACE_WITH_ARGS so that it
     is not enabled when not supported by the combination of clang and
     GNU ld"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Subscribe Microsoft Azure Cobalt 100 to erratum 3194386
  arm64: fix selection of HAVE_DYNAMIC_FTRACE_WITH_ARGS
  arm64: errata: Expand speculative SSBS workaround once more
  arm64: cputype: Add Neoverse-N3 definitions
  arm64: Force position-independent veneers

Pull RISC-V fixes from Palmer Dabbelt:

 - PERF_TYPE_BREAKPOINT now returns -EOPNOTSUPP instead of -ENOENT,
   which aligns to other ports and is a saner value

 - The KASAN-related stack size increasing logic has been moved to a C
   header, to avoid dependency issues

* tag 'riscv-for-linus-6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Fix kernel stack size when KASAN is enabled
  drivers/perf: riscv: Align errno for unsupported perf event

Pull tracing fixes from Steven Rostedt:

 - Fix tp_printk command line option crashing the kernel

   With the code that can handle a buffer from a previous boot, the
   trace_check_vprintf() needed access to the delta of the address space
   used by the old buffer and the current buffer. To do so, the
   trace_array (tr) parameter was used. But when tp_printk is enabled on
   the kernel command line, no trace buffer is used and the trace event
   is sent directly to printk(). That meant the tr field of the iterator
   descriptor was NULL, and since tp_printk still uses
   trace_check_vprintf() it caused a NULL dereference.

 - Add ptrace.h include to x86 ftrace file for completeness

 - Fix rtla installation when done with out-of-tree build

 - Fix the help messages in rtla that were incorrect

 - Several fixes to fix races with the timerlat and hwlat code

   Several locking issues were discovered with the coordination between
   timerlat kthread creation and hotplug. As timerlat has callbacks from
   hotplug code to start kthreads when CPUs come online. There are also
   locking issues with grabbing the cpu_read_lock() and the locks within
   timerlat.

* tag 'trace-v6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  tracing/hwlat: Fix a race during cpuhp processing
  tracing/timerlat: Fix a race during cpuhp processing
  tracing/timerlat: Drop interface_lock in stop_kthread()
  tracing/timerlat: Fix duplicated kthread creation due to CPU online/offline
  x86/ftrace: Include <asm/ptrace.h>
  rtla: Fix the help text in osnoise and timerlat top tools
  tools/rtla: Fix installation from out-of-tree build
  tracing: Fix trace_check_vprintf() when tp_printk is used

Pull slab fixes from Vlastimil Babka:
 "Fixes for issues introduced in this merge window: kobject memory leak,
  unsupressed warning and possible lockup in new slub_kunit tests,
  misleading code in kvfree_rcu_queue_batch()"

* tag 'slab-for-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
  slub/kunit: skip test_kfree_rcu when the slub kunit test is built-in
  mm, slab: suppress warnings in test_leak_destroy kunit test
  rcu/kvfree: Refactor kvfree_rcu_queue_batch()
  mm, slab: fix use of SLAB_SUPPORTS_SYSFS in kmem_cache_release()

Pull ACPI fixes from Rafael Wysocki:
 "These fix up the ACPI IRQ override quirk list and add two new entries
  to it, add a new quirk to the ACPI backlight (video) driver, and fix
  the ACPI battery driver.

  Specifics:

   - Add a quirk for Dell OptiPlex 5480 AIO to the ACPI backlight
     (video) driver (Hans de Goede)

   - Prevent the ACPI battery driver from crashing when unregistering a
     battery hook and simplify battery hook locking in it (Armin Wolf)

   - Fix up the ACPI IRQ override quirk list and add quirks for Asus
     Vivobook X1704VAP and Asus ExpertBook B2502CVA to it (Hans de
     Goede)"

* tag 'acpi-6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: battery: Fix possible crash when unregistering a battery hook
  ACPI: battery: Simplify battery hook locking
  ACPI: video: Add backlight=native quirk for Dell OptiPlex 5480 AIO
  ACPI: resource: Add Asus ExpertBook B2502CVA to irq1_level_low_skip_override[]
  ACPI: resource: Add Asus Vivobook X1704VAP to irq1_level_low_skip_override[]
  ACPI: resource: Loosen the Asus E1404GAB DMI match to also cover the E1404GA
  ACPI: resource: Remove duplicate Asus E1504GAB IRQ override

Pull power management fixes from Rafael Wysocki:
 "These fix two cpufreq issues, one in the core and one in the
  intel_pstate driver:

   - Fix CPU device node reference counting in the cpufreq core (Miquel
     Sabaté Solà)

   - Turn the spinlock used by the intel_pstate driver in hard IRQ
     context into a raw one to prevent the driver from crashing when
     PREEMPT_RT is enabled (Uwe Kleine-König)"

* tag 'pm-6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: Avoid a bad reference count on CPU node
  cpufreq: intel_pstate: Make hwp_notify_lock a raw spinlock

Pull gpio fixes from Bartosz Golaszewski:

 - fix a potential NULL-pointer dereference in gpiolib core

 - fix a probe() regression from the v6.12 merge window and an older bug
   leading to missed interrupts in gpio-davinci

* tag 'gpio-fixes-for-v6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpiolib: Fix potential NULL pointer dereference in gpiod_get_label()
  gpio: davinci: Fix condition for irqchip registration
  gpio: davinci: fix lazy disable

Pull sound fixes from Takashi Iwai:
 "Slightly high amount of changes in this round, partly because of my
  vacation in the last weeks. But all changes are small and nothing
  looks worrisome.

  The biggest LOCs is MAINTAINERS updates, and there is a core change
  for card-ID string creation for non-ASCII inputs. Others are rather
  device-specific, such as new quirks and device IDs for ASoC, usual
  HD-audio and USB-audio quirks and fixes, as well as regression fixes
  in HD-audio HDMI audio and Conexant codec"

* tag 'sound-6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (39 commits)
  ALSA: hda/conexant: Fix conflicting quirk for System76 Pangolin
  ALSA: line6: add hw monitor volume control to POD HD500X
  ALSA: gus: Fix some error handling paths related to get_bpos() usage
  ALSA: hda: Add missing parameter description for snd_hdac_stream_timecounter_init()
  ALSA: usb-audio: Add native DSD support for Luxman D-08u
  ALSA: core: add isascii() check to card ID generator
  MAINTAINERS: ALSA: use linux-sound@vger.kernel.org list
  Revert "ALSA: hda: Conditionally use snooping for AMD HDMI"
  ASoC: intel: sof_sdw: Add check devm_kasprintf() returned value
  ASoC: imx-card: Set card.owner to avoid a warning calltrace if SND=m
  ASoC: dt-bindings: davinci-mcasp: Fix interrupts property
  ASoC: qcom: sm8250: add qrb4210-rb2-sndcard compatible string
  ASoC: dt-bindings: qcom,sm8250: add qrb4210-rb2-sndcard
  ALSA: hda: fix trigger_tstamp_latched
  ALSA: hda/realtek: Add a quirk for HP Pavilion 15z-ec200
  ALSA: hda/generic: Drop obsoleted obey_preferred_dacs flag
  ALSA: hda/generic: Unconditionally prefer preferred_dacs pairs
  ALSA: silence integer wrapping warning
  ASoC: Intel: soc-acpi: arl: Fix some missing empty terminators
  ASoC: Intel: soc-acpi-intel-rpl-match: add missing empty item
  ...

Pull drm fixes from Dave Airlie:
 "Weekly fixes, xe and amdgpu lead the way, with panthor, and few core
  components getting various fixes. Nothing seems too out of the
  ordinary.

  atomic:
   - Use correct type when reading damage rectangles

  display:
   - Fix kernel docs

  dp-mst:
   - Fix DSC decompression detection

  hdmi:
   - Fix infoframe size

  sched:
   - Update maintainers
   - Fix race condition whne queueing up jobs
   - Fix locking in drm_sched_entity_modify_sched()
   - Fix pointer deref if entity queue changes

  sysfb:
   - Disable sysfb if framebuffer parent device is unknown

  amdgpu:
   - DML2 fix
   - DSC fix
   - Dispclk fix
   - eDP HDR fix
   - IPS fix
   - TBT fix

  i915:
   - One fix for bitwise and logical "and" mixup in PM code

  xe:
   - Restore pci state on resume
   - Fix locking on submission, queue and vm
   - Fix UAF on queue destruction
   - Fix resource release on freq init error path
   - Use rw_semaphore to reduce contention on ASID->VM lookup
   - Fix steering for media on Xe2_HPM
   - Tuning updates to Xe2
   - Resume TDR after GT reset to prevent jobs running forever
   - Move id allocation to avoid userspace using a guessed number to
     trigger UAF
   - Fix OA stream close preventing pbatch buffers to complete
   - Fix NPD when migrating memory on LNL
   - Fix memory leak when aborting binds

  panthor:
   - Fix locking
   - Set FOP_UNSIGNED_OFFSET in fops instance
   - Acquire lock in panthor_vm_prepare_map_op_ctx()
   - Avoid uninitialized variable in tick_ctx_cleanup()
   - Do not block scheduler queue if work is pending
   - Do not add write fences to the shared BOs

  vbox:
   - Fix VLA handling"

* tag 'drm-fixes-2024-10-04' of https://gitlab.freedesktop.org/drm/kernel: (41 commits)
  drm/xe: Fix memory leak when aborting binds
  drm/xe: Prevent null pointer access in xe_migrate_copy
  drm/xe/oa: Don't reset OAC_CONTEXT_ENABLE on OA stream close
  drm/xe/queue: move xa_alloc to prevent UAF
  drm/xe/vm: move xa_alloc to prevent UAF
  drm/xe: Clean up VM / exec queue file lock usage.
  drm/xe: Resume TDR after GT reset
  drm/xe/xe2: Add performance tuning for L3 cache flushing
  drm/xe/xe2: Extend performance tuning to media GT
  drm/xe/mcr: Use Xe2_LPM steering tables for Xe2_HPM
  drm/xe: Use helper for ASID -> VM in GPU faults and access counters
  drm/xe: Convert to USM lock to rwsem
  drm/xe: use devm_add_action_or_reset() helper
  drm/xe: fix UAF around queue destruction
  drm/xe/guc_submit: add missing locking in wedged_fini
  drm/xe: Restore pci state upon resume
  drm/amd/display: Fix system hang while resume with TBT monitor
  drm/amd/display: Enable idle workqueue for more IPS modes
  drm/amd/display: Add HDR workaround for specific eDP
  drm/amd/display: avoid set dispclk to 0
  ...

Pull block fixes from Jens Axboe:

 - Fix another use-after-free in aoe

 - Fixup wrong nested non-saving irq disable/restore in blk-iocost

 - Fixup a kerneldoc complaint introduced by a merge window patch

* tag 'block-6.12-20241004' of git://git.kernel.dk/linux:
  aoe: fix the potential use-after-free problem in more places
  blk_iocost: remove some duplicate irq disable/enables
  block: fix blk_rq_map_integrity_sg kernel-doc

Pull io_uring fixes from Jens Axboe:

 - Fix an error path memory leak, if one part fails to allocate.
   Obviously not something that'll generally hit without error
   injection.

 - Fix an io_req_flags_t cast to make sparse happier.

 - Improve the recv multishot termination. Not a bug now, but could be
   one in the future. This makes it do the same thing that recvmsg does
   in terms of when to terminate a request or not.

* tag 'io_uring-6.12-20241004' of git://git.kernel.dk/linux:
  io_uring/net: harden multishot termination case for recv
  io_uring: fix casts to io_req_flags_t
  io_uring: fix memory leak when cache init fail

Pull fsnotify fixes from Jan Kara:
 "Fixes for an inotify deadlock and a data race in fsnotify"

* tag 'fsnotify_for_v6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  inotify: Fix possible deadlock in fsnotify_destroy_mark
  fsnotify: Avoid data race between fsnotify_recalc_mask() and fsnotify_object_watched()

Pull UDF fixes from Jan Kara:
 "A couple of UDF error handling fixes for issues spotted by syzbot"

* tag 'fs_for_v6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  udf: fix uninit-value use in udf_get_fileshortad
  udf: refactor inode_bmap() to handle error
  udf: refactor udf_next_aext() to handle error
  udf: refactor udf_current_aext() to handle error

Pull ceph fixes from Ilya Dryomov:
 "A fix from Patrick for a variety of CephFS lockup scenarios caused by
  a regression in cap handling which sneaked in through the netfs helper
  library in 5.18 (marked for stable) and an unrelated one-line cleanup"

* tag 'ceph-for-6.12-rc2' of https://github.com/ceph/ceph-client:
  ceph: fix cap ref leak via netfs init_request
  ceph: use struct_size() helper in __ceph_pool_perm_get()

Merge an ACPI backlight (video) quirk and ACPI battery driver fix and
cleanup for 6.12-rc2:

 - Add a quirk for Dell OptiPlex 5480 AIO to the ACPI backlight (video)
   driver (Hans de Goede).

 - Prevent the ACPI battery driver from crashing when unregistering a
   battery hook and simplify battery hook locking in it (Armin Wolf).

* acpi-video:
  ACPI: video: Add backlight=native quirk for Dell OptiPlex 5480 AIO

* acpi-battery:
  ACPI: battery: Fix possible crash when unregistering a battery hook
  ACPI: battery: Simplify battery hook locking

Pull btrfs fixes from David Sterba:

 - in incremental send, fix invalid clone operation for file that got
   its size decreased

 - fix __counted_by() annotation of send path cache entries, we do not
   store the terminating NUL

 - fix a longstanding bug in relocation (and quite hard to hit by
   chance), drop back reference cache that can get out of sync after
   transaction commit

 - wait for fixup worker kthread before finishing umount

 - add missing raid-stripe-tree extent for NOCOW files, zoned mode
   cannot have NOCOW files but RST is meant to be a standalone feature

 - handle transaction start error during relocation, avoid potential
   NULL pointer dereference of relocation control structure (reported by
   syzbot)

 - disable module-wide rate limiting of debug level messages

 - minor fix to tracepoint definition (reported by checkpatch.pl)

* tag 'for-6.12-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: disable rate limiting when debug enabled
  btrfs: wait for fixup workers before stopping cleaner kthread during umount
  btrfs: fix a NULL pointer dereference when failed to start a new trasacntion
  btrfs: send: fix invalid clone operation for file that got its size decreased
  btrfs: tracepoints: end assignment with semicolon at btrfs_qgroup_extent event class
  btrfs: drop the backref cache during relocation if we commit
  btrfs: also add stripe entries for NOCOW writes
  btrfs: send: fix buffer overflow detection when copying path to cache entry

Pull smb client fixes from Steve French:

 - statfs fix (e.g. when limited access to root directory of share)

 - special file handling fixes: fix packet validation to avoid buffer
   overflow for reparse points, fixes for symlink path parsing (one for
   reparse points, and one for SFU use case), and fix for cleanup after
   failed SET_REPARSE operation.

 - fix for SMB2.1 signing bug introduced by recent patch to NFS symlink
   path, and NFS reparse point validation

 - comment cleanup

* tag 'v6.12-rc1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: Do not convert delimiter when parsing NFS-style symlinks
  cifs: Validate content of NFS reparse point buffer
  cifs: Fix buffer overflow when parsing NFS reparse points
  smb: client: Correct typos in multiple comments across various files
  smb: client: use actual path when queryfs
  cifs: Remove intermediate object of failed create reparse call
  Revert "smb: client: make SHA-512 TFM ephemeral"
  smb: Update comments about some reparse point tags
  cifs: Check for UTF-16 null codepoint in SFU symlink target location

Pull close_range() fix from Al Viro:
 "Fix the logic in descriptor table trimming"

* tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  close_range(): fix the logics in descriptor table trimming

This patch reverts two TOMOYO patches that were merged into Linus' tree
during the v6.12 merge window:

8b985bbf ("tomoyo: allow building as a loadable LSM module")
268225a1 ("tomoyo: preparation step for building as a loadable LSM module")

Together these two patches introduced the CONFIG_SECURITY_TOMOYO_LKM
Kconfig build option which enabled a TOMOYO specific dynamic LSM loading
mechanism (see the original commits for more details).  Unfortunately,
this approach was widely rejected by the LSM community as well as some
members of the general kernel community.  Objections included concerns
over setting a bad precedent regarding individual LSMs managing their
LSM callback registrations as well as general kernel symbol exporting
practices.  With little to no support for the CONFIG_SECURITY_TOMOYO_LKM
approach outside of Tetsuo, and multiple objections, we need to revert
these changes.

Link: https://lore.kernel.org/all/0c4b443a-9c72-4800-97e8-a3816b6a9ae2@I-love.SAKURA.ne.jp
Link: https://lore.kernel.org/all/CAHC9VhR=QjdoHG3wJgHFJkKYBg7vkQH2MpffgVzQ0tAByo_wRg@mail.gmail.comAcked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

Add the Microsoft Azure Cobalt 100 CPU to the list of CPUs suffering
from erratum 3194386 added in commit 75b3c43e ("arm64: errata:
Expand speculative SSBS workaround")

CC: Mark Rutland <mark.rutland@arm.com>
CC: James More <james.morse@arm.com>
CC: Will Deacon <will@kernel.org>
CC: stable@vger.kernel.org # 6.6+
Signed-off-by: Easwar Hariharan <eahariha@linux.microsoft.com>
Link: https://lore.kernel.org/r/20241003225239.321774-1-eahariha@linux.microsoft.comSigned-off-by: Catalin Marinas <catalin.marinas@arm.com>

We received a regression report for System76 Pangolin (pang14) due to
the recent fix for Tuxedo Sirius devices to support the top speaker.
The reason was the conflicting PCI SSID, as often seen.

As a workaround, now the codec SSID is checked and the quirk is
applied conditionally only to Sirius devices.

Fixes: 4178d78c ("ALSA: hda/conexant: Add pincfg quirk to enable top speakers on Sirius devices")
Reported-by: Christian Heusel <christian@heusel.eu>
Reported-by: Jerry <jerryluo225@gmail.com>
Closes: https://lore.kernel.org/c930b6a6-64e5-498f-b65a-1cd5e0a1d733@heusel.eu
Link: https://patch.msgid.link/20241004082602.29016-1-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

Add hw monitor volume control for POD HD500X. This is done adding
LINE6_CAP_HWMON_CTL to the capabilities
Signed-off-by: Hans P. Moller <hmoller@uc.cl>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20241003232828.5819-1-hmoller@uc.cl

If get_bpos() fails, it is likely that the corresponding error code should
be returned.

Fixes: a6970bb1 ("ALSA: gus: Convert to the new PCM ops")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://patch.msgid.link/d9ca841edad697154afa97c73a5d7a14919330d9.1727984008.git.christophe.jaillet@wanadoo.frSigned-off-by: Takashi Iwai <tiwai@suse.de>

Driver Changes:
- Restore pci state on resume (Rodrigo Vivi)
- Fix locking on submission, queue and vm (Matthew Auld, Matthew Brost)
- Fix UAF on queue destruction (Matthew Auld)
- Fix resource release on freq init error path (He Lugang)
- Use rw_semaphore to reduce contention on ASID->VM lookup (Matthew Brost)
- Fix steering for media on Xe2_HPM (Gustavo Sousa)
- Tuning updates to Xe2 (Gustavo Sousa)
- Resume TDR after GT reset to prevent jobs running forever (Matthew Brost)
- Move id allocation to avoid userspace using a guessed number
  to trigger UAF (Matthew Auld, Matthew Brost)
- Fix OA stream close preventing pbatch buffers to complete (José)
- Fix NPD when migrating memory on LNL (Zhanjun Dong)
- Fix memory leak when aborting binds (Matthew Brost)
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/2fiv63yanlal5mpw3mxtotte6yvkvtex74c7mkjxca4bazlyja@o4iejcfragxy

Pull Rust fixes from Miguel Ojeda:
 "Toolchain and infrastructure:

   - Fix/improve a couple 'depends on' on the newly added CFI/KASAN
     suppport to avoid build errors/warnings

   - Fix ARCH_SLAB_MINALIGN multiple definition error for RISC-V under
     !CONFIG_MMU

   - Clean upcoming (Rust 1.83.0) Clippy warnings

  'kernel' crate:

   - 'sync' module: fix soundness issue by requiring 'T: Sync' for
     'LockedBy::access'; and fix helpers build error under PREEMPT_RT

   - Fix trivial sorting issue ('rustfmtcheck') on the v6.12 Rust merge"

* tag 'rust-fixes-6.12' of https://github.com/Rust-for-Linux/linux:
  rust: kunit: use C-string literals to clean warning
  cfi: encode cfi normalized integers + kasan/gcov bug in Kconfig
  rust: KASAN+RETHUNK requires rustc 1.83.0
  rust: cfi: fix `patchable-function-entry` starting version
  rust: mutex: fix __mutex_init() usage in case of PREEMPT_RT
  rust: fix `ARCH_SLAB_MINALIGN` multiple definition error
  rust: sync: require `T: Sync` for `LockedBy::access`
  rust: kernel: sort Rust modules

Pull ufs fix from Al Viro:
 "Fix ufs_rename() braino introduced this cycle.

  The 'folio_release_kmap(dir_folio, new_dir)' in ufs_rename() part of
  folio conversion should've been getting a pointer to ufs directory
  entry within the page, rather than a pointer to directory struct
  inode..."

* tag 'pull-fixes.ufs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  ufs_rename(): fix bogus argument of folio_release_kmap()

Brandon reports sporadic, non-sensical spikes in cumulative pressure
time (total=) when reading cpu.pressure at a high rate. This is due to
a race condition between reader aggregation and tasks changing states.

While it affects all states and all resources captured by PSI, in
practice it most likely triggers with CPU pressure, since scheduling
events are so frequent compared to other resource events.

The race context is the live snooping of ongoing stalls during a
pressure read. The read aggregates per-cpu records for stalls that
have concluded, but will also incorporate ad-hoc the duration of any
active state that hasn't been recorded yet. This is important to get
timely measurements of ongoing stalls. Those ad-hoc samples are
calculated on-the-fly up to the current time on that CPU; since the
stall hasn't concluded, it's expected that this is the minimum amount
of stall time that will enter the per-cpu records once it does.

The problem is that the path that concludes the state uses a CPU clock
read that is not synchronized against aggregators; the clock is read
outside of the seqlock protection. This allows aggregators to race and
snoop a stall with a longer duration than will actually be recorded.

With the recorded stall time being less than the last snapshot
remembered by the aggregator, a subsequent sample will underflow and
observe a bogus delta value, resulting in an erratic jump in pressure.

Fix this by moving the clock read of the state change into the seqlock
protection. This ensures no aggregation can snoop live stalls past the
time that's recorded when the state concludes.
Reported-by: Brandon Duffany <brandon@buildbuddy.io>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=219194
Link: https://lore.kernel.org/lkml/20240827121851.GB438928@cmpxchg.org/
Fixes: df774306 ("psi: Reduce calls to sched_clock() in psi")
Cc: stable@vger.kernel.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Chengming Zhou <chengming.zhou@linux.dev>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The cpuhp online/offline processing race also exists in percpu-mode hwlat
tracer in theory, apply the fix too. That is:

    T1                       | T2
    [CPUHP_ONLINE]           | cpu_device_down()
     hwlat_hotplug_workfn()  |
                             |     cpus_write_lock()
                             |     takedown_cpu(1)
                             |     cpus_write_unlock()
    [CPUHP_OFFLINE]          |
        cpus_read_lock()     |
        start_kthread(1)     |
        cpus_read_unlock()   |

Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20240924094515.3561410-5-liwei391@huawei.com
Fixes: ba998f7d ("trace/hwlat: Support hotplug operations")
Signed-off-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

There is another found exception that the "timerlat/1" thread was
scheduled on CPU0, and lead to timer corruption finally:

```
ODEBUG: init active (active state 0) object: ffff888237c2e108 object type: hrtimer hint: timerlat_irq+0x0/0x220
WARNING: CPU: 0 PID: 426 at lib/debugobjects.c:518 debug_print_object+0x7d/0xb0
Modules linked in:
CPU: 0 UID: 0 PID: 426 Comm: timerlat/1 Not tainted 6.11.0-rc7+ #45
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014
RIP: 0010:debug_print_object+0x7d/0xb0
...
Call Trace:
 <TASK>
 ? __warn+0x7c/0x110
 ? debug_print_object+0x7d/0xb0
 ? report_bug+0xf1/0x1d0
 ? prb_read_valid+0x17/0x20
 ? handle_bug+0x3f/0x70
 ? exc_invalid_op+0x13/0x60
 ? asm_exc_invalid_op+0x16/0x20
 ? debug_print_object+0x7d/0xb0
 ? debug_print_object+0x7d/0xb0
 ? __pfx_timerlat_irq+0x10/0x10
 __debug_object_init+0x110/0x150
 hrtimer_init+0x1d/0x60
 timerlat_main+0xab/0x2d0
 ? __pfx_timerlat_main+0x10/0x10
 kthread+0xb7/0xe0
 ? __pfx_kthread+0x10/0x10
 ret_from_fork+0x2d/0x40
 ? __pfx_kthread+0x10/0x10
 ret_from_fork_asm+0x1a/0x30
 </TASK>
```

After tracing the scheduling event, it was discovered that the migration
of the "timerlat/1" thread was performed during thread creation. Further
analysis confirmed that it is because the CPU online processing for
osnoise is implemented through workers, which is asynchronous with the
offline processing. When the worker was scheduled to create a thread, the
CPU may has already been removed from the cpu_online_mask during the offline
process, resulting in the inability to select the right CPU:

T1                       | T2
[CPUHP_ONLINE]           | cpu_device_down()
osnoise_hotplug_workfn() |
                         |     cpus_write_lock()
                         |     takedown_cpu(1)
                         |     cpus_write_unlock()
[CPUHP_OFFLINE]          |
    cpus_read_lock()     |
    start_kthread(1)     |
    cpus_read_unlock()   |

To fix this, skip online processing if the CPU is already offline.

Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20240924094515.3561410-4-liwei391@huawei.com
Fixes: c8895e27 ("trace/osnoise: Support hotplug operations")
Signed-off-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

stop_kthread() is the offline callback for "trace/osnoise:online", since
commit 5bfbcd1e ("tracing/timerlat: Add interface_lock around clearing
of kthread in stop_kthread()"), the following ABBA deadlock scenario is
introduced:

T1                            | T2 [BP]               | T3 [AP]
osnoise_hotplug_workfn()      | work_for_cpu_fn()     | cpuhp_thread_fun()
                              |   _cpu_down()         |   osnoise_cpu_die()
  mutex_lock(&interface_lock) |                       |     stop_kthread()
                              |     cpus_write_lock() |       mutex_lock(&interface_lock)
  cpus_read_lock()            |     cpuhp_kick_ap()   |

As the interface_lock here in just for protecting the "kthread" field of
the osn_var, use xchg() instead to fix this issue. Also use
for_each_online_cpu() back in stop_per_cpu_kthreads() as it can take
cpu_read_lock() again.

Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20240924094515.3561410-3-liwei391@huawei.com
Fixes: 5bfbcd1e ("tracing/timerlat: Add interface_lock around clearing of kthread in stop_kthread()")
Signed-off-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

osnoise_hotplug_workfn() is the asynchronous online callback for
"trace/osnoise:online". It may be congested when a CPU goes online and
offline repeatedly and is invoked for multiple times after a certain
online.

This will lead to kthread leak and timer corruption. Add a check
in start_kthread() to prevent this situation.

Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20240924094515.3561410-2-liwei391@huawei.com
Fixes: c8895e27 ("trace/osnoise: Support hotplug operations")
Signed-off-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

<asm/ftrace.h> uses struct pt_regs in several places. Include
<asm/ptrace.h> to ensure it's visible. This is needed to make sure
object files that only include <asm/asm-prototypes.h> compile.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lore.kernel.org/20240916221557.846853-2-samitolvanen@google.comSuggested-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

The help text in osnoise top and timerlat top had some minor errors
and omissions. The -d option was missing the 's' (second) abbreviation and
the error message for '-d' used '-D'.

Cc: stable@vger.kernel.org
Fixes: 1eceb2fc ("rtla/osnoise: Add osnoise top mode")
Fixes: a828cd18 ("rtla: Add timerlat tool and timelart top mode")
Link: https://lore.kernel.org/20240813155831.384446-1-ezulian@redhat.comSuggested-by: Tomas Glozar <tglozar@redhat.com>
Reviewed-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Eder Zulian <ezulian@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

rtla now supports out-of-tree builds, but installation fails as it
still tries to install the rtla binary from the source tree.  Use the
existing macro $(RTLA) to refer to the binary.

Link: https://lore.kernel.org/ZudubuoU_JHjPZ7w@decadent.org.uk
Fixes: 01474dc7 ("tools/rtla: Use tools/build makefiles to build rtla")
Reviewed-by: Tomas Glozar <tglozar@redhat.com>
Tested-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Ben Hutchings <benh@debian.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

When the tp_printk kernel command line is used, the trace events go
directly to printk(). It is still checked via the trace_check_vprintf()
function to make sure the pointers of the trace event are legit.

The addition of reading buffers from previous boots required adding a
delta between the addresses of the previous boot and the current boot so
that the pointers in the old buffer can still be used. But this required
adding a trace_array pointer to acquire the delta offsets.

The tp_printk code does not provide a trace_array (tr) pointer, so when
the offsets were examined, a NULL pointer dereference happened and the
kernel crashed.

If the trace_array does not exist, just default the delta offsets to zero,
as that also means the trace event is not being read from a previous boot.

Link: https://lore.kernel.org/all/Zv3z5UsG_jsO9_Tb@aschofie-mobl2.lan/

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20241003104925.4e1b1fd9@gandalf.local.home
Fixes: 07714b4b ("tracing: Handle old buffer mappings for event strings and functions")
Reported-by: Alison Schofield <alison.schofield@intel.com>
Tested-by: Alison Schofield <alison.schofield@intel.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

In `gpiod_get_label()`, it is possible that `srcu_dereference_check()` may
return a NULL pointer, leading to a scenario where `label->str` is accessed
without verifying if `label` itself is NULL.

This patch adds a proper NULL check for `label` before accessing
`label->str`. The check for `label->str != NULL` is removed because
`label->str` can never be NULL if `label` is not NULL.

This fixes the issue where the label name was being printed as `(efault)`
when dumping the sysfs GPIO file when `label == NULL`.

Fixes: 5a646e03 ("gpiolib: Return label, if set, for IRQ only line")
Fixes: a86d2769 ("gpiolib: fix the speed of descriptor label setting with SRCU")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20241003131351.472015-1-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

NFS-style symlinks have target location always stored in NFS/UNIX form
where backslash means the real UNIX backslash and not the SMB path
separator.

So do not mangle slash and backslash content of NFS-style symlink during
readlink() syscall as it is already in the correct Linux form.

This fixes interoperability of NFS-style symlinks with backslashes created
by Linux NFS3 client throw Windows NFS server and retrieved by Linux SMB
client throw Windows SMB server, where both Windows servers exports the
same directory.

Fixes: d5ecebc4 ("smb3: Allow query of symlinks stored as reparse points")
Acked-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>