On x86_64 we must disable preemption before we enable interrupts
for stack faults, int3 and debugging, because the current task is using
a per CPU debug stack defined by the IST. If we schedule out, another task
can come in and use the same stack and cause the stack to be corrupted
and crash the kernel on return.

When CONFIG_PREEMPT_RT is enabled, spinlock_t locks become sleeping, and
one of these is the spin lock used in signal handling.

Some of the debug code (int3) causes do_trap() to send a signal.
This function calls a spinlock_t lock that has been converted to a
sleeping lock. If this happens, the above issues with the corrupted
stack is possible.

Instead of calling the signal right away, for PREEMPT_RT and x86,
the signal information is stored on the stacks task_struct and
TIF_NOTIFY_RESUME is set. Then on exit of the trap, the signal resume
code will send the signal when preemption is enabled.

[ rostedt: Switched from #ifdef CONFIG_PREEMPT_RT to
  ARCH_RT_DELAYS_SIGNAL_SEND and added comments to the code. ]
[bigeasy: Add on 32bit as per Yang Shi, minor rewording. ]
[ tglx: Use a config option ]

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/Ygq5aBB/qMQw6aP5@linutronix.de

Not strickly needed but checking CONFIG_VMAP_STACK instead of
task_stack_vm_area()' result allows the compiler the remove the else
path in the CONFIG_VMAP_STACK case where the pointer can't be NULL.

Check for CONFIG_VMAP_STACK in order to use the proper path.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220217102406.3697941-9-bigeasy@linutronix.de

The task stack could be deallocated later, but for fork()/exec() kind of
workloads (say a shell script executing several commands) it is important
that the stack is released in finish_task_switch() so that in VMAP_STACK
case it can be cached and reused in the new task.

For PREEMPT_RT it would be good if the wake-up in vfree_atomic() could
be avoided in the scheduling path. Far worse are the other
free_thread_stack() implementations which invoke __free_pages()/
kmem_cache_free() with disabled preemption.

Cache the stack in free_thread_stack() in the VMAP_STACK case and
RCU-delay the free path otherwise. Free the stack in the RCU callback.
In the VMAP_STACK case this is another opportunity to fill the cache.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220217102406.3697941-8-bigeasy@linutronix.de

There is no need to perform the stack accounting of the outgoing task in
its final schedule() invocation which happens with preemption disabled.
The task is leaving, the resources will be freed and the accounting can
happen in do_exit() before the actual schedule invocation which
frees the stack memory.

Move the accounting of the stack memory from release_task_stack() to
exit_task_stack_account() which then can be invoked from do_exit().

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220217102406.3697941-7-bigeasy@linutronix.de

memcg_charge_kernel_stack() is only used in the CONFIG_VMAP_STACK case.

Move memcg_charge_kernel_stack() into the CONFIG_VMAP_STACK block and
invoke it from within alloc_thread_stack_node().

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220217102406.3697941-6-bigeasy@linutronix.de

All four versions of alloc_thread_stack_node() assign now
task_struct::stack in case the allocation was successful.

Let alloc_thread_stack_node() return an error code instead of the stack
pointer and remove the stack assignment in dup_task_struct().

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220217102406.3697941-5-bigeasy@linutronix.de

Provide a generic alloc_thread_stack_node() for IA64 and
CONFIG_ARCH_THREAD_STACK_ALLOCATOR which returns stack pointer and sets
task_struct::stack so it behaves exactly like the other implementations.

Rename IA64's alloc_thread_stack_node() and add the generic version to the
fork code so it is in one place _and_ to drastically lower the chances of
fat fingering the IA64 code.  Do the same for free_thread_stack().

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220217102406.3697941-4-bigeasy@linutronix.de

alloc_thread_stack_node() already populates the task_struct::stack
member except on IA64. The stack pointer is saved and populated again
because IA64 needs it and arch_dup_task_struct() overwrites it.

Allocate thread's stack after task_struct has been duplicated as a
preparation for further changes.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220217102406.3697941-3-bigeasy@linutronix.de

The use of ifdef CONFIG_VMAP_STACK is confusing in terms what is
actually happenning and what can happen.

For instance from reading free_thread_stack() it appears that in the
CONFIG_VMAP_STACK case it may receive a non-NULL vm pointer but it may also
be NULL in which case __free_pages() is used to free the stack.  This is
however not the case because in the VMAP case a non-NULL pointer is always
returned here.  Since it looks like this might happen, the compiler creates
the correct dead code with the invocation to __free_pages() and everything
around it. Twice.

Add spaces between the ifdef and the identifer to recognize the ifdef
level which is currently in scope.

Add the current identifer as a comment behind #else and #endif.
Move the code within free_thread_stack() and alloc_thread_stack_node()
into the relevant ifdef blocks.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220217102406.3697941-2-bigeasy@linutronix.de

Pull locking fix from Borislav Petkov:
 "Fix a NULL ptr dereference when dumping lockdep chains through
  /proc/lockdep_chains"

* tag 'locking_urgent_for_v5.17_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  lockdep: Correct lock_classes index mapping

Pull x86 fixes from Borislav Petkov:

 - Fix the ptrace regset xfpregs_set() callback to behave according to
   the ABI

 - Handle poisoned pages properly in the SGX reclaimer code

* tag 'x86_urgent_for_v5.17_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/ptrace: Fix xfpregs_set()'s incorrect xmm clearing
  x86/sgx: Fix missing poison handling in reclaimer

Pull scheduler fix from Borislav Petkov:
 "Fix task exposure order when forking tasks"

* tag 'sched_urgent_for_v5.17_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched: Fix yet more sched_fork() races

Pull EDAC fix from Borislav Petkov:
 "Fix a long-standing struct alignment bug in the EDAC struct allocation
  code"

* tag 'edac_urgent_for_v5.17_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
  EDAC: Fix calculation of returned address and next offset in edac_align_ptr()

Pull SCSI fixes from James Bottomley:
 "Three fixes, all in drivers.

  The ufs and qedi fixes are minor; the lpfc one is a bit bigger because
  it involves adding a heuristic to detect and deal with common but not
  standards compliant behaviour"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: ufs: core: Fix divide by zero in ufshcd_map_queues()
  scsi: lpfc: Fix pt2pt NVMe PRLI reject LOGO loop
  scsi: qedi: Fix ABBA deadlock in qedi_process_tmf_resp() and qedi_process_cmd_cleanup_resp()

Pull dmaengine fixes from Vinod Koul:
 "A bunch of driver fixes for:

   - ptdma error handling in init

   - lock fix in at_hdmac

   - error path and error num fix for sh dma

   - pm balance fix for stm32"

* tag 'dmaengine-fix-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine:
  dmaengine: shdma: Fix runtime PM imbalance on error
  dmaengine: sh: rcar-dmac: Check for error num after dma_set_max_seg_size
  dmaengine: stm32-dmamux: Fix PM disable depth imbalance in stm32_dmamux_probe
  dmaengine: sh: rcar-dmac: Check for error num after setting mask
  dmaengine: at_xdmac: Fix missing unlock in at_xdmac_tasklet()
  dmaengine: ptdma: Fix the error handling path in pt_core_init()

Pull i2c fixes from Wolfram Sang:
 "Some driver updates, a MAINTAINERS fix, and additions to COMPILE_TEST
  (so we won't miss build problems again)"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  MAINTAINERS: remove duplicate entry for i2c-qcom-geni
  i2c: brcmstb: fix support for DSL and CM variants
  i2c: qup: allow COMPILE_TEST
  i2c: imx: allow COMPILE_TEST
  i2c: cadence: allow COMPILE_TEST
  i2c: qcom-cci: don't put a device tree node before i2c_add_adapter()
  i2c: qcom-cci: don't delete an unregistered adapter
  i2c: bcm2835: Avoid clock stretching timeouts

Pull input fixes from Dmitry Torokhov:

 - a fix for Synaptics touchpads in RMI4 mode failing to suspend/resume
   properly because I2C client devices are now being suspended and
   resumed asynchronously which changed the ordering

 - a change to make sure we do not set right and middle buttons
   capabilities on touchpads that are "buttonpads" (i.e. do not have
   separate physical buttons)

 - a change to zinitix touchscreen driver adding more compatible
   strings/IDs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: psmouse - set up dependency between PS/2 and SMBus companions
  Input: zinitix - add new compatible strings
  Input: clear BTN_RIGHT/MIDDLE on buttonpads

Pull power supply fixes from Sebastian Reichel:
 "Three regression fixes for the 5.17 cycle:

   - build warning fix for power-supply documentation

   - pointer size fix in cw2015 battery driver

   - OOM handling in bq256xx charger driver"

* tag 'for-v5.17-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply:
  power: supply: bq256xx: Handle OOM correctly
  power: supply: core: fix application of sizeof to pointer
  power: supply: fix table problem in sysfs-class-power

Merge tag 'fs.mount_setattr.v5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux

Pull mount_setattr test/doc fixes from Christian Brauner:
 "This contains a fix for one of the selftests for the mount_setattr
  syscall to create idmapped mounts, an entry for idmapped mounts for
  maintainers, and missing kernel documentation for the helper we split
  out some time ago to get and yield write access to a mount when
  changing mount properties"

* tag 'fs.mount_setattr.v5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  fs: add kernel doc for mnt_{hold,unhold}_writers()
  MAINTAINERS: add entry for idmapped mounts
  tests: fix idmapped mount_setattr test

Pull pidfd fix from Christian Brauner:
 "This fixes a problem reported by lockdep when installing a pidfd via
  fd_install() with siglock and the tasklisk write lock held in
  copy_process() when calling clone()/clone3() with CLONE_PIDFD.

  Originally a pidfd was created prior to holding any of these locks but
  this required a call to ksys_close(). So quite some time ago in
  6fd2fe49 ("copy_process(): don't use ksys_close() on cleanups") we
  switched to a get_unused_fd_flags() + fd_install() model.

  As part of that we moved fd_install() as late as possible. This was
  done for two main reasons. First, because we needed to ensure that we
  call fd_install() past the point of no return as once that's called
  the fd is live in the task's file table. Second, because we tried to
  ensure that the fd is visible in /proc/<pid>/fd/<pidfd> right when the
  task is visible.

  This fix moves the fd_install() to an even later point which means
  that a task will be visible in proc while the pidfd isn't yet under
  /proc/<pid>/fd/<pidfd>.

  While this is a user visible change it's very unlikely that this will
  have any impact. Nobody should be relying on that and if they do we
  need to come up with something better but again, it's doubtful this is
  relevant"

* tag 'pidfd.v5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  copy_process(): Move fd_install() out of sighand->siglock critical section

Merge branch 'ucount-rlimit-fixes-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

Pull ucounts fixes from Eric Biederman:
 "Michal Koutný recently found some bugs in the enforcement of
  RLIMIT_NPROC in the recent ucount rlimit implementation.

  In this set of patches I have developed a very conservative approach
  changing only what is necessary to fix the bugs that I can see
  clearly. Cleanups and anything that is making the code more consistent
  can follow after we have the code working as it has historically.

  The problem is not so much inconsistencies (although those exist) but
  that it is very difficult to figure out what the code should be doing
  in the case of RLIMIT_NPROC.

  All other rlimits are only enforced where the resource is acquired
  (allocated). RLIMIT_NPROC by necessity needs to be enforced in an
  additional location, and our current implementation stumbled it's way
  into that implementation"

* 'ucount-rlimit-fixes-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  ucounts: Handle wrapping in is_ucounts_overlimit
  ucounts: Move RLIMIT_NPROC handling after set_user
  ucounts: Base set_cred_ucounts changes on the real user
  ucounts: Enforce RLIMIT_NPROC not RLIMIT_NPROC+1
  rlimit: Fix RLIMIT_NPROC enforcement failure caused by capability calls in set_user

The driver is already covered in the ARM/QUALCOMM section. Also, Akash
Asthana's email bounces meanwhile and Mukesh Savaliya has never
responded to mails regarding this driver.

Signed-off-by: Wolfram Sang <wsa@kernel.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

Where commit 4ef0c5c6 ("kernel/sched: Fix sched_fork() access an
invalid sched_task_group") fixed a fork race vs cgroup, it opened up a
race vs syscalls by not placing the task on the runqueue before it
gets exposed through the pidhash.

Commit 13765de8 ("sched/fair: Fix fault in reweight_entity") is
trying to fix a single instance of this, instead fix the whole class
of issues, effectively reverting this commit.

Fixes: 4ef0c5c6

 ("kernel/sched: Fix sched_fork() access an invalid sched_task_group")
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Tadeusz Struk <tadeusz.struk@linaro.org>
Tested-by: Zhang Qiao <zhangqiao22@huawei.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://lkml.kernel.org/r/YgoeCbwj5mbCR0qA@hirez.programming.kicks-ass.net

Pull NFS client bugfixes from Anna Schumaker:

 - Fix unnecessary changeattr revalidations

 - Fix resolving symlinks during directory lookups

 - Don't report writeback errors in nfs_getattr()

* tag 'nfs-for-5.17-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  NFS: Do not report writeback errors in nfs_getattr()
  NFS: LOOKUP_DIRECTORY is also ok with symlinks
  NFS: Remove an incorrect revalidation in nfs4_update_changeattr_locked()

Pull ACPI fixes from Rafael Wysocki:
 "These make an excess warning message go away and fix a recently
  introduced boot failure on a vintage machine.

  Specifics:

   - Change the log level of the "table not found" message in
     acpi_table_parse_entries_array() to debug to prevent it from
     showing up in the logs unnecessarily (Dan Williams)

   - Add a C-state limit quirk for 32-bit ThinkPad T40 to prevent it
     from crashing on boot after recent changes in the ACPI processor
     driver (Woody Suwalski)"

* tag 'acpi-5.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: processor: idle: fix lockup regression on 32-bit ThinkPad T40
  ACPI: tables: Quiet ACPI table not found warning

Pull RISC-V fixes from Palmer Dabbelt:
 "A set of three fixes, all aimed at fixing some fallout from the recent
  sparse hart ID support"

* tag 'riscv-for-linus-5.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  RISC-V: Fix IPI/RFENCE hmask on non-monotonic hartid ordering
  RISC-V: Fix handling of empty cpu masks
  RISC-V: Fix hartid mask handling for hartid 31 and up

When we switch from emulated PS/2 to native (RMI4 or Elan) protocols, we
create SMBus companion devices that are attached to I2C/SMBus controllers.
However, when suspending and resuming, we also need to make sure that we
take into account the PS/2 device they are associated with, so that PS/2
device is suspended after the companion and resumed before it, otherwise
companions will not work properly. Before I2C devices were marked for
asynchronous suspend/resume, this ordering happened naturally, but now we
need to enforce it by establishing device links, with PS/2 devices being
suppliers and SMBus companions being consumers.

Fixes: 172d9319

 ("i2c: enable async suspend/resume on i2c client devices")
Reported-and-tested-by: Hugh Dickins <hughd@google.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/r/89456fcd-a113-4c82-4b10-a9bcaefac68f@google.com
Link: https://lore.kernel.org/r/YgwQN8ynO88CPMju@google.com


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Merge fix for a recent boot lockup regression on 32-bit ThinkPad T40.

* acpi-processor:
  ACPI: processor: idle: fix lockup regression on 32-bit ThinkPad T40

Pull MTD fixes from Miquel Raynal:
 "MTD changes:

   - Qcom:
      - Don't print error message on -EPROBE_DEFER
      - Fix kernel panic on skipped partition
      - Fix missing free for pparts in cleanup

   - phram: Prevent divide by zero bug in phram_setup()

  Raw NAND controller changes:

   - ingenic: Fix missing put_device in ingenic_ecc_get

   - qcom: Fix clock sequencing in qcom_nandc_probe()

   - omap2: Prevent invalid configuration and build error

   - gpmi: Don't leak PM reference in error path

   - brcmnand: Fix incorrect sub-page ECC status"

* tag 'mtd/fixes-for-5.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
  mtd: rawnand: brcmnand: Fixed incorrect sub-page ECC status
  mtd: rawnand: gpmi: don't leak PM reference in error path
  mtd: phram: Prevent divide by zero bug in phram_setup()
  mtd: rawnand: omap2: Prevent invalid configuration and build error
  mtd: parsers: qcom: Fix missing free for pparts in cleanup
  mtd: parsers: qcom: Fix kernel panic on skipped partition
  mtd: parsers: qcom: Don't print error message on -EPROBE_DEFER
  mtd: rawnand: qcom: Fix clock sequencing in qcom_nandc_probe()
  mtd: rawnand: ingenic: Fix missing put_device in ingenic_ecc_get

Pull block fixes from Jens Axboe:

 - Surprise removal fix (Christoph)

 - Ensure that pages are zeroed before submitted for userspace IO
   (Haimin)

 - Fix blk-wbt accounting issue with BFQ (Laibin)

 - Use bsize for discard granularity in loop (Ming)

 - Fix missing zone handling in blk_complete_request() (Pankaj)

* tag 'block-5.17-2022-02-17' of git://git.kernel.dk/linux-block:
  block/wbt: fix negative inflight counter when remove scsi device
  block: fix surprise removal for drivers calling blk_set_queue_dying
  block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern
  block: loop:use kstatfs.f_bsize of backing file to set discard granularity
  block: Add handling for zone append command in blk_complete_request

Pull sound fixes from Takashi Iwai:
 "A collection of small patches, mostly for old and new regressions and
  device-specific fixes.

   - Regression fixes regarding ALSA core SG-buffer helpers

   - Regression fix for Realtek HD-audio mutex deadlock

   - Regression fix for USB-audio PM resume error

   - More coverage of ASoC core control API notification fixes

   - Old regression fixes for HD-audio probe mask

   - Fixes for ASoC Realtek codec work handling

   - Other device-specific quirks / fixes"

* tag 'sound-5.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (24 commits)
  ASoC: intel: skylake: Set max DMA segment size
  ASoC: SOF: hda: Set max DMA segment size
  ALSA: hda: Set max DMA segment size
  ALSA: hda/realtek: Fix deadlock by COEF mutex
  ALSA: usb-audio: Don't abort resume upon errors
  ALSA: hda: Fix missing codec probe on Shenker Dock 15
  ALSA: hda: Fix regression on forced probe mask option
  ALSA: hda/realtek: Add quirk for Legion Y9000X 2019
  ALSA: usb-audio: revert to IMPLICIT_FB_FIXED_DEV for M-Audio FastTrack Ultra
  ASoC: wm_adsp: Correct control read size when parsing compressed buffer
  ASoC: qcom: Actually clear DMA interrupt register for HDMI
  ALSA: memalloc: invalidate SG pages before sync
  ALSA: memalloc: Fix dma_need_sync() checks
  MAINTAINERS: update cros_ec_codec maintainers
  ASoC: rt5682: do not block workqueue if card is unbound
  ASoC: rt5668: do not block workqueue if card is unbound
  ASoC: rt5682s: do not block workqueue if card is unbound
  ASoC: tas2770: Insert post reset delay
  ASoC: Revert "ASoC: mediatek: Check for error clk pointer"
  ASoC: amd: acp: Set gpio_spkr_en to None for max speaker amplifer in machine driver
  ...

Pull arm64 fix from Catalin Marinas:
 "Fix wrong branch label in the EL2 GICv3 initialisation code"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Correct wrong label in macro __init_el2_gicv3

Pull powerpc fixes from Michael Ellerman:

 - Fix boot failure on 603 with DEBUG_PAGEALLOC and KFENCE

 - Fix 32-build with newer binutils that rejects 'ptesync' etc

Thanks to Anders Roxell, Christophe Leroy, and Maxime Bizon.

* tag 'powerpc-5.17-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/lib/sstep: fix 'ptesync' build error
  powerpc/603: Fix boot failure with DEBUG_PAGEALLOC and KFENCE

Pull cifs fixes from Steve French:
 "Six small smb3 client fixes, three for stable:

   - fix for snapshot mount option

   - two ACL related fixes

   - use after free race fix

   - fix for confusing warning message logged with older dialects"

* tag '5.17-rc5-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: fix confusing unneeded warning message on smb2.1 and earlier
  cifs: modefromsids must add an ACE for authenticated users
  cifs: fix double free race when mount fails in cifs_get_root()
  cifs: do not use uninitialized data in the owner/group sid
  cifs: fix set of group SID via NTSD xattrs
  smb3: fix snapshot mount option

xfpregs_set() handles 32-bit REGSET_XFP and 64-bit REGSET_FP. The actual
code treats these regsets as modern FX state (i.e. the beginning part of
XSTATE). The declarations of the regsets thought they were the legacy
i387 format. The code thought they were the 32-bit (no xmm8..15) variant
of XSTATE and, for good measure, made the high bits disappear by zeroing
the wrong part of the buffer. The latter broke ptrace, and everything
else confused anyone trying to understand the code. In particular, the
nonsense definitions of the regsets confused me when I wrote this code.

Clean this all up. Change the declarations to match reality (which
shouldn't change the generated code, let alone the ABI) and fix
xfpregs_set() to clear the correct bits and to only do so for 32-bit
callers.

Fixes: 6164331d

 ("x86/fpu: Rewrite xfpregs_set()")
Reported-by: Luís Ferreira <contact@lsferreira.net>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=215524
Link: https://lore.kernel.org/r/YgpFnZpF01WwR8wU@zn.tnic

DSL and CM (Cable Modem) support 8 B max transfer size and have a custom
DT binding for that reason. This driver was checking for a wrong
"compatible" however which resulted in an incorrect setup.

Fixes: e2e5a2c6

 ("i2c: brcmstb: Adding support for CM and DSL SoCs")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

Merge tag 'linux-kselftest-fixes-5.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull Kselftest fixes from Shuah Khan:
 "Fixes to ftrace, exec, and seccomp tests build, run-time and install
  bugs. These bugs are in the way of running the tests"

* tag 'linux-kselftest-fixes-5.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/ftrace: Do not trace do_softirq because of PREEMPT_RT
  selftests/seccomp: Fix seccomp failure by adding missing headers
  selftests/exec: Add non-regular to TEST_GEN_PROGS

Pull drm fixes from Dave Airlie:
 "Regular fixes for rc5, nothing really stands out, mostly some amdgpu
  and i915 fixes with mediatek, radeon and some misc fixes.

  cma-helper:
   - set VM_DONTEXPAND

  atomic:
   - error handling fix

  mediatek:
   - fix probe defer loop with external bridge

  amdgpu:
   - Stable pstate clock fixes for Dimgrey Cavefish and Beige Goby
   - S0ix SDMA fix
   - Yellow Carp GPU reset fix

  radeon:
   - Backlight fix for iMac 12,1

  i915:
   - GVT kerneldoc cleanup.
   - GVT Kconfig should depend on X86
   - Prevent out of range access in SWSCI display code
   - Fix mbus join and dbuf slice config lookup
   - Fix inverted priority selection in the TTM backend
   - Fix FBC plane end Y offset check"

* tag 'drm-fixes-2022-02-18' of git://anongit.freedesktop.org/drm/drm:
  drm/atomic: Don't pollute crtc_state->mode_blob with error pointers
  drm/radeon: Fix backlight control on iMac 12,1
  drm/amd/pm: correct the sequence of sending gpu reset msg
  drm/amdgpu: skipping SDMA hw_init and hw_fini for S0ix.
  drm/amd/pm: correct UMD pstate clocks for Dimgrey Cavefish and Beige Goby
  drm/i915/fbc: Fix the plane end Y offset check
  drm/i915/opregion: check port number bounds for SWSCI display power state
  drm/i915/ttm: tweak priority hint selection
  drm/i915: Fix mbus join config lookup
  drm/i915: Fix dbuf slice config lookup
  drm/cma-helper: Set VM_DONTEXPAND for mmap
  drm/mediatek: mtk_dsi: Avoid EPROBE_DEFER loop with external bridge
  drm/i915/gvt: Make DRM_I915_GVT depend on X86
  drm/i915/gvt: clean up kernel-doc in gtt.c

Merge tag 'drm-intel-fixes-2022-02-17' of git://anongit.freedesktop.org/drm/drm-intel

 into drm-fixes

- GVT kerneldoc cleanup. (Randy Dunlap)
- GVT Kconfig should depend on X86. (Siva Mullati)
- Prevent out of range access in SWSCI display code. (Jani Nikula)
- Fix mbus join and dbuf slice config lookup. (Ville Syrjälä)
- Fix inverted priority selection in the TTM backend. (Matthew Auld)
- Fix FBC plane end Y offset check. (Ville Syrjälä)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Yg4lA6k8+xp8u3aB@tursulin-mobl2