Some file system events (i.e. FS_ERROR) might not be associated with an
inode or directory.  For these, we can retrieve the super block from the
data field.  But, since the super_block is available in the data field
on every event type, simplify the code to always retrieve it from there,
through a new helper.

Link: https://lore.kernel.org/r/20211025192746.66445-11-krisman@collabora.comSuggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>

fsnotify_add_event is growing in number of parameters, which in most
case are just passed a NULL pointer.  So, split out a new
fsnotify_insert_event function to clean things up for users who don't
need an insert hook.

Link: https://lore.kernel.org/r/20211025192746.66445-10-krisman@collabora.comSuggested-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>

Similarly to fanotify_is_perm_event and friends, provide a helper
predicate to say whether a mask is of an overflow event.

Link: https://lore.kernel.org/r/20211025192746.66445-9-krisman@collabora.comSuggested-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>

According to Amir:

"FS_IN_IGNORED is completely internal to inotify and there is no need
to set it in i_fsnotify_mask at all, so if we remove the bit from the
output of inotify_arg_to_mask() no functionality will change and we will
be able to overload the event bit for FS_ERROR."

This is done in preparation to overload FS_ERROR with the notification
mechanism in fanotify.

Link: https://lore.kernel.org/r/20211025192746.66445-8-krisman@collabora.comSuggested-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>

FAN_FS_ERROR will require fsid, but not necessarily require the
filesystem to expose a file handle.  Split those checks into different
functions, so they can be used separately when setting up an event.

While there, update a comment about tmpfs having 0 fsid, which is no
longer true.

Link: https://lore.kernel.org/r/20211025192746.66445-7-krisman@collabora.comReviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>

Every time this function is invoked, it is immediately added to
FAN_EVENT_METADATA_LEN, since there is no need to just calculate the
length of info records. This minor clean up folds the rest of the
calculation into the function, which now operates in terms of events,
returning the size of the entire event, including metadata.

Link: https://lore.kernel.org/r/20211025192746.66445-6-krisman@collabora.comReviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>

Some events, like the overflow event, are not mergeable, so they are not
hashed.  But, when failing inside fsnotify_add_event for lack of space,
fsnotify_add_event() still calls the insert hook, which adds the
overflow event to the merge list.  Add a check to prevent any kind of
unmergeable event to be inserted in the hashtable.

Fixes: 94e00d28 ("fsnotify: use hash table for faster events merge")
Link: https://lore.kernel.org/r/20211025192746.66445-5-krisman@collabora.comReviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>

Clarify argument names and contract for fsnotify_create() and
fsnotify_mkdir() to reflect the anomaly of kernfs, which leaves dentries
negavite after mkdir/create.

Remove the WARN_ON(!inode) in audit code that were added by the Fixes
commit under the wrong assumption that dentries cannot be negative after
mkdir/create.

Fixes: aa93bdc5 ("fsnotify: use helpers to access data by data_type")
Link: https://lore.kernel.org/linux-fsdevel/87mtp5yz0q.fsf@collabora.com/
Link: https://lore.kernel.org/r/20211025192746.66445-4-krisman@collabora.comReviewed-by: Jan Kara <jack@suse.cz>
Reported-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>

Define a new data type to pass for event - FSNOTIFY_EVENT_DENTRY.
Use it to pass the dentry instead of it's ->d_inode where available.

This is needed in preparation to the refactor to retrieve the super
block from the data field.  In some cases (i.e. mkdir in kernfs), the
data inode comes from a negative dentry, such that no super block
information would be available. By receiving the dentry itself, instead
of the inode, fsnotify can derive the super block even on these cases.

Link: https://lore.kernel.org/r/20211025192746.66445-3-krisman@collabora.comReviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
[Expand explanation in commit message]
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>

Align the arguments of fsnotify_name() to those of fsnotify().

Link: https://lore.kernel.org/r/20211025192746.66445-2-krisman@collabora.comReviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>

Pull powerpc fixes from Michael Ellerman:
 "A bit of a big batch, partly because I didn't send any last week, and
  also just because the BPF fixes happened to land this week.

  Summary:

   - Fix a regression hit by the IPR SCSI driver, introduced by the
     recent addition of MSI domains on pseries.

   - A big series including 8 BPF fixes, some with potential security
     impact and the rest various code generation issues.

   - Fix our program check assembler entry path, which was accidentally
     jumping into a gas macro and generating strange stack frames, which
     could confuse find_bug().

   - A couple of fixes, and related changes, to fix corner cases in our
     machine check handling.

   - Fix our DMA IOMMU ops, which were not always returning the optimal
     DMA mask, leading to at least one device falling back to 32-bit DMA
     when it shouldn't.

   - A fix for KUAP handling on 32-bit Book3S.

   - Fix crashes seen when kdumping on some pseries systems.

  Thanks to Naveen N. Rao, Nicholas Piggin, Alexey Kardashevskiy, Cédric
  Le Goater, Christophe Leroy, Mahesh Salgaonkar, Abdul Haleem,
  Christoph Hellwig, Johan Almbladh, Stan Johnson"

* tag 'powerpc-5.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  pseries/eeh: Fix the kdump kernel crash during eeh_pseries_init
  powerpc/32s: Fix kuap_kernel_restore()
  powerpc/pseries/msi: Add an empty irq_write_msi_msg() handler
  powerpc/64s: Fix unrecoverable MCE calling async handler from NMI
  powerpc/64/interrupt: Reconcile soft-mask state in NMI and fix false BUG
  powerpc/64: warn if local irqs are enabled in NMI or hardirq context
  powerpc/traps: do not enable irqs in _exception
  powerpc/64s: fix program check interrupt emergency stack path
  powerpc/bpf ppc32: Fix BPF_SUB when imm == 0x80000000
  powerpc/bpf ppc32: Do not emit zero extend instruction for 64-bit BPF_END
  powerpc/bpf ppc32: Fix JMP32_JSET_K
  powerpc/bpf ppc32: Fix ALU32 BPF_ARSH operation
  powerpc/bpf: Emit stf barrier instruction sequences for BPF_NOSPEC
  powerpc/security: Add a helper to query stf_barrier type
  powerpc/bpf: Fix BPF_SUB when imm == 0x80000000
  powerpc/bpf: Fix BPF_MOD when imm == 1
  powerpc/bpf: Validate branch ranges
  powerpc/lib: Add helper to check if offset is within conditional branch range
  powerpc/iommu: Report the correct most efficient DMA mask for PCI devices

Pull objtool fixes from Borislav Petkov:

 - Remove an extra section.len member in favour of section.sh_size

 - Align .altinstructions section creation with the kernel's by creating
   them with entry size of 0

 - Fix objtool to convert a reloc symbol to a section offset and not to
   not warn about not knowing how

* tag 'objtool_urgent_for_v5.15_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool: Remove redundant 'len' field from struct section
  objtool: Make .altinstructions section entry size consistent
  objtool: Remove reloc symbol type checks in get_alt_entry()

Pull x86 fixes from Borislav Petkov:

 - A FPU fix to properly handle invalid MXCSR values: 32-bit masks them
   out due to historical reasons and 64-bit kernels reject them

 - A fix to clear X86_FEATURE_SMAP when support for is not
   config-enabled

 - Three fixes correcting misspelled Kconfig symbols used in code

 - Two resctrl object cleanup fixes

 - Yet another attempt at fixing the neverending saga of botched x86
   timers, this time because some incredibly smart hardware decides to
   turn off the HPET timer in a low power state - who cares if the OS is
   relying on it...

 - Check the full return value range of an SEV VMGEXIT call to determine
   whether it returned an error

* tag 'x86_urgent_for_v5.15_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fpu: Restore the masking out of reserved MXCSR bits
  x86/Kconfig: Correct reference to MWINCHIP3D
  x86/platform/olpc: Correct ifdef symbol to intended CONFIG_OLPC_XO15_SCI
  x86/entry: Clear X86_FEATURE_SMAP when CONFIG_X86_SMAP=n
  x86/entry: Correct reference to intended CONFIG_64_BIT
  x86/resctrl: Fix kfree() of the wrong type in domain_add_cpu()
  x86/resctrl: Free the ctrlval arrays when domain_setup_mon_state() fails
  x86/hpet: Use another crystalball to evaluate HPET usability
  x86/sev: Return an error on a returned non-zero SW_EXITINFO1[31:0]

Pull i2c fixes from Wolfram Sang:
 "Three driver bugfixes and one leak fix for the core"

* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: mlxcpld: Modify register setting for 400KHz frequency
  i2c: mlxcpld: Fix criteria for frequency setting
  i2c: mediatek: Add OFFSET_EXT_CONF setting back
  i2c: acpi: fix resource leak in reconfiguration device addition

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

  The big change is the UFS task management rework, with lpfc next and
  the rest being fairly minor and obvious fixes"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: iscsi: Fix iscsi_task use after free
  scsi: lpfc: Fix memory overwrite during FC-GS I/O abort handling
  scsi: elx: efct: Delete stray unlock statement
  scsi: ufs: core: Fix task management completion
  scsi: acornscsi: Remove scsi_cmd_to_tag() reference

Pull block fixes from Jens Axboe:
 "Two small fixes for this release:

   - Add missing QUEUE_FLAG_HCTX_ACTIVE in the debugfs handling
     (Johannes)

   - Fix double free / UAF issue in __alloc_disk_node (Tetsuo)"

* tag 'block-5.15-2021-10-09' of git://git.kernel.dk/linux-block:
  block: decode QUEUE_FLAG_HCTX_ACTIVE in debugfs output
  block: genhd: fix double kfree() in __alloc_disk_node()

Pull ksmbd fixes from Steve French:
 "Six fixes for the ksmbd kernel server, including two additional
  overflow checks, a fix for oops, and some cleanup (e.g. remove dead
  code for less secure dialects that has been removed)"

* tag '5.15-rc4-ksmbd-fixes' of git://git.samba.org/ksmbd:
  ksmbd: fix oops from fuse driver
  ksmbd: fix version mismatch with out of tree
  ksmbd: use buf_data_size instead of recalculation in smb3_decrypt_req()
  ksmbd: remove the leftover of smb2.0 dialect support
  ksmbd: check strictly data area in ksmbd_smb2_check_message()
  ksmbd: add the check to vaildate if stream protocol length exceeds maximum value

Pull RISC-V fixes from Palmer Dabbelt:

 - A pair of fixes (along with the necessory cleanup) to our VDSO, to
   avoid a locking during OOM and to prevent the text from overflowing
   into the data page

 - A fix to checksyscalls to teach it about our rv32 UABI

 - A fix to add clone3() to the rv32 UABI, which was pointed out by
   checksyscalls

 - A fix to properly flush the icache on the local CPU in addition to
   the remote CPUs

* tag 'riscv-for-linus-5.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  checksyscalls: Unconditionally ignore fstat{,at}64
  riscv: Flush current cpu icache before other cpus
  RISC-V: Include clone3() on rv32
  riscv/vdso: make arch_setup_additional_pages wait for mmap_sem for write killable
  riscv/vdso: Move vdso data page up front
  riscv/vdso: Refactor asm/vdso.h

Pull s390 fixes from Vasily Gorbik:

 - Fix potential memory leak on a error path in eBPF

 - Fix handling of zpci device on reserve

* tag 's390-5.15-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/pci: fix zpci_zdev_put() on reserve
  bpf, s390: Fix potential memory leak about jit_data

Pull xtensa fixes from Max Filippov:

 - fix build/boot issues caused by CONFIG_OF vs CONFIC_USE_OF usage

 - fix reset handler for xtfpga boards

* tag 'xtensa-20211008' of git://github.com/jcmvbkbc/linux-xtensa:
  xtensa: xtfpga: Try software restart before simulating CPU reset
  xtensa: xtfpga: use CONFIG_USE_OF instead of CONFIG_OF
  xtensa: call irqchip_init only when CONFIG_USE_OF is selected
  xtensa: use CONFIG_USE_OF instead of CONFIG_OF

Pull xen fixes from Juergen Gross:

 - fix two minor issues in the Xen privcmd driver plus a cleanup patch
   for that driver

 - fix multiple issues related to running as PVH guest and some related
   earlyprintk fixes for other Xen guest types

 - fix an issue introduced in 5.15 the Xen balloon driver

* tag 'for-linus-5.15b-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/balloon: fix cancelled balloon action
  xen/x86: adjust data placement
  x86/PVH: adjust function/data placement
  xen/x86: hook up xen_banner() also for PVH
  xen/x86: generalize preferred console model from PV to PVH Dom0
  xen/x86: make "earlyprintk=xen" work for HVM/PVH DomU
  xen/x86: allow "earlyprintk=xen" to work for PV Dom0
  xen/x86: make "earlyprintk=xen" work better for PVH Dom0
  xen/x86: allow PVH Dom0 without XEN_PV=y
  xen/x86: prevent PVH type from getting clobbered
  xen/privcmd: drop "pages" parameter from xen_remap_pfn()
  xen/privcmd: fix error handling in mmap-resource processing
  xen/privcmd: replace kcalloc() by kvcalloc() when allocating empty pages

Merge tag 'asm-generic-fixes-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic fixes from Arnd Bergmann:
 "There is one build fix for Arm platforms that ended up impacting most
  architectures because of the way the drivers/firmware Kconfig file is
  wired up:

  The CONFIG_QCOM_SCM dependency have caused a number of randconfig
  regressions over time, and some still remain in v5.15-rc4. The fix we
  agreed on in the end is to make this symbol selected by any driver
  using it, and then building it even for non-Arm platforms with
  CONFIG_COMPILE_TEST.

  To make this work on all architectures, the drivers/firmware/Kconfig
  file needs to be included for all architectures to make the symbol
  itself visible.

  In a separate discussion, we found that a sound driver patch that is
  pending for v5.16 needs the same change to include this Kconfig file,
  so the easiest solution seems to have my Kconfig rework included in
  v5.15.

  Finally, the branch also includes a small unrelated build fix for
  NOMMU architectures"

Link: https://lore.kernel.org/all/20210928153508.101208f8@canb.auug.org.au/
Link: https://lore.kernel.org/all/20210928075216.4193128-1-arnd@kernel.org/
Link: https://lore.kernel.org/all/20211007151010.333516-1-arnd@kernel.org/

* tag 'asm-generic-fixes-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic/io.h: give stub iounmap() on !MMU same prototype as elsewhere
  qcom_scm: hide Kconfig symbol
  firmware: include drivers/firmware/Kconfig unconditionally

Pull ACPI fix from Rafael Wysocki:
 "Fix a recent ACPI-related regression in the PCI subsystem that
  introduced a NULL pointer dereference possible to trigger from
  user space via sysfs on some systems"

* tag 'acpi-5.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PCI: ACPI: Check parent pointer in acpi_pci_find_companion()

Pull USB fixes from Greg KH:
 "Here are some small USB fixes for 5.15-rc5 that resolve a number of
  reported issues:

   - gadget driver fixes

   - xhci build warning fixes

   - build configuration fix

   - cdc-acm tty handling fixes

   - cdc-wdm fix

   - typec fixes

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'usb-5.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: cdc-acm: fix break reporting
  USB: cdc-acm: fix racy tty buffer accesses
  usb: gadget: f_uac2: fixed EP-IN wMaxPacketSize
  usb: cdc-wdm: Fix check for WWAN
  usb: chipidea: ci_hdrc_imx: Also search for 'phys' phandle
  usb: typec: tcpm: handle SRC_STARTUP state if cc changes
  usb: typec: tcpci: don't handle vSafe0V event if it's not enabled
  usb: typec: tipd: Remove dependency on "connector" child fwnode
  Partially revert "usb: Kconfig: using select for USB_COMMON dependency"
  usb: dwc3: gadget: Revert "set gadgets parent to the right controller"
  usb: xhci: tegra: mark PM functions as __maybe_unused

Pull MMC fixes from Ulf Hansson:
 "A couple of MMC host fixes:

   - meson-gx: Fix read/write access for dram-access-quirk

   - sdhci-of-at91: Fix calibration sequence"

* tag 'mmc-v5.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: meson-gx: do not use memcpy_to/fromio for dram-access-quirk
  mmc: sdhci-of-at91: replace while loop with read_poll_timeout
  mmc: sdhci-of-at91: wait for calibration done before proceed

Pull drm fixes from Dave Airlie:
 "I've returned from my tropical island retreat, even managed to bring
  one of my kids on a dive with some turtles. Thanks to Daniel for doing
  last week's work.

  Otherwise this is the weekly fixes pull, it's a bit bigger because the
  vc4 reverts in your tree caused some problems with fixes in the
  drm-misc tree so it got left out last week, so this week has the misc
  fixes rebased without the vc4 pieces.

  Otherwise it's i915, amdgpu with the usual fixes and a scattering over
  other drivers.

  I expect things should calm down a bit more next week.

  core:
   - Kconfig fix for fb_simple vs simpledrm.

  i915:
   - Fix RKL HDMI audio
   - Fix runtime pm imbalance on i915_gem_shrink() error path
   - Fix Type-C port access before hw/sw state sync
   - Fix VBT backlight struct version/size check
   - Fix VT-d async flip on SKL/BXT with plane stretch workaround

  amdgpu:
   - DCN 3.1 DP alt mode fixes
   - S0ix gfxoff fix
   - Fix DRM_AMD_DC_SI dependencies
   - PCIe DPC handling fix
   - DCN 3.1 scaling fix
   - Documentation fix

  amdkfd:
   - Fix potential memory leak
   - IOMMUv2 init fixes

  vc4 (there were some hdmi fixes but things got reverted, sort it out
       later):
   - compiler fix

  nouveau:
   - Cursor fix
   - Fix ttm buffer moves for ampere gpu's by adding minimal
     acceleration support.
   - memory leak fixes

  rockchip:
   - crtc/clk fixup

  panel:
   - ili9341 Fix DT bindings indent
   - y030xx067a - yellow tint init seq fix

  gbefb:
   - Fix gbefb when built with COMPILE_TEST"

* tag 'drm-fixes-2021-10-08' of git://anongit.freedesktop.org/drm/drm: (33 commits)
  drm/amd/display: Fix detection of 4 lane for DPALT
  drm/amd/display: Limit display scaling to up to 4k for DCN 3.1
  drm/amd/display: Skip override for preferred link settings during link training
  drm/nouveau/debugfs: fix file release memory leak
  drm/nouveau/kms/nv50-: fix file release memory leak
  drm/nouveau: avoid a use-after-free when BO init fails
  DRM: delete DRM IRQ legacy midlayer docs
  video: fbdev: gbefb: Only instantiate device when built for IP32
  fbdev: simplefb: fix Kconfig dependencies
  drm/panel: abt-y030xx067a: yellow tint fix
  dt-bindings: panel: ili9341: correct indentation
  drm/nouveau/fifo/ga102: initialise chid on return from channel creation
  drm/rockchip: Update crtc fixup to account for fractional clk change
  drm/nouveau/ga102-: support ttm buffer moves via copy engine
  drm/nouveau/kms/tu102-: delay enabling cursor until after assign_windows
  drm/sun4i: dw-hdmi: Fix HDMI PHY clock setup
  drm/vc4: hdmi: Remove unused struct
  drm/kmb: Enable alpha blended second plane
  drm/amdgpu: handle the case of pci_channel_io_frozen only in amdgpu_pci_resume
  drm/amdgpu: init iommu after amdkfd device init
  ...

It made -Werror sad.
Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Ser Olmy reported a boot failure:

  init[1] bad frame in sigreturn frame:(ptrval) ip:b7c9fbe6 sp:bf933310 orax:ffffffff \
	  in libc-2.33.so[b7bed000+156000]
  Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
  CPU: 0 PID: 1 Comm: init Tainted: G        W         5.14.9 #1
  Hardware name: Hewlett-Packard HP PC/HP Board, BIOS  JD.00.06 12/06/2001
  Call Trace:
   dump_stack_lvl
   dump_stack
   panic
   do_exit.cold
   do_group_exit
   get_signal
   arch_do_signal_or_restart
   ? force_sig_info_to_task
   ? force_sig
   exit_to_user_mode_prepare
   syscall_exit_to_user_mode
   do_int80_syscall_32
   entry_INT80_32

on an old 32-bit Intel CPU:

  vendor_id       : GenuineIntel
  cpu family      : 6
  model           : 6
  model name      : Celeron (Mendocino)
  stepping        : 5
  microcode       : 0x3

Ser bisected the problem to the commit in Fixes.

tglx suggested reverting the rejection of invalid MXCSR values which
this commit introduced and replacing it with what the old code did -
simply masking them out to zero.

Further debugging confirmed his suggestion:

  fpu->state.fxsave.mxcsr: 0xb7be13b4, mxcsr_feature_mask: 0xffbf
  WARNING: CPU: 0 PID: 1 at arch/x86/kernel/fpu/signal.c:384 __fpu_restore_sig+0x51f/0x540

so restore the original behavior only for 32-bit kernels where you have
ancient machines with buggy hardware. For 32-bit programs on 64-bit
kernels, user space which supplies wrong MXCSR values is considered
malicious so fail the sigframe restoration there.

Fixes: 6f9866a1 ("x86/fpu/signal: Let xrstor handle the features to init")
Reported-by: Ser Olmy <ser.olmy@protonmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Ser Olmy <ser.olmy@protonmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/YVtA67jImg3KlBTw@zn.tnic

Merge tag 'amd-drm-fixes-5.15-2021-10-06' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-5.15-2021-10-06:

amdgpu:
- DCN 3.1 DP alt mode fixes
- S0ix gfxoff fix
- Fix DRM_AMD_DC_SI dependencies
- PCIe DPC handling fix
- DCN 3.1 scaling fix
- Documentation fix

amdkfd:
- Fix potential memory leak
- IOMMUv2 init fixes
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211006203828.4818-1-alexander.deucher@amd.com

Rebased drm-misc-fixes for v5.15-rc5:
- Dropped vc4 patches.
- Compiler fix for vc4.
- Cursor fix for nouveau.
- Fix ttm buffer moves for ampere gpu's by adding minimal acceleration support.
- Small rockchip fixes.
- Fix DT bindings indent for ili9341.
- Fix y030xx067a init sequence to not get a yellow tint.
- Kconfig fix for fb_simple vs simpledrm.
- Assorted nouvaeu memory leaks.
- Fix gbefb when built with COMPILE_TEST.
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/3272bf72-2c37-31eb-404e-cf7edd485c7d@linux.intel.com

Merge tag 'drm-intel-fixes-2021-10-07' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

drm/i915 fixes for v5.15-rc5:
- Fix RKL HDMI audio
- Fix runtime pm imbalance on i915_gem_shrink() error path
- Fix Type-C port access before hw/sw state sync
- Fix VBT backlight struct version/size check
- Fix VT-d async flip on SKL/BXT with plane stretch workaround
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87k0ipywo4.fsf@intel.com

These can be replaced by statx().  Since rv32 has a 64-bit time_t we
just never ended up with them in the first place.  This is now an error
due to -Werror.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

Pull nfsd fixes from Chuck Lever:
 "Bug fixes for NFSD error handling paths"

* tag 'nfsd-5.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  NFSD: Keep existing listeners on portlist error
  SUNRPC: fix sign error causing rpcsec_gss drops
  nfsd: Fix a warning for nfsd_file_close_inode
  nfsd4: Handle the NFSv4 READDIR 'dircount' hint being zero
  nfsd: fix error handling of register_pernet_subsys() in init_nfsd()

Pull ARM SoC fixes from Arnd Bergmann:
 "This is a larger than normal update for Arm SoC specific code, most of
  it in device trees, but also drivers and the omap and at91/sama7
  platforms:

   - There are four new entries to the MAINTAINERS file: Sven Peter and
     Alyssa Rosenzweig for Apple M1, Romain Perier for Mstar/sigmastar,
     and Vignesh Raghavendra for TI K3

   - Build fixes to address randconfig warnings in sharpsl, dove, omap1,
     and qcom platforms as well as the scmi and op-tee subsystems

   - Regression fixes for missing CONFIG_FB and other options for
     several defconfigs

   - Several bug fixes for the newly added Microchip SAMA7 platform,
     mostly regarding power management

   - Missing SMP barriers to protect accesses to SCMI virtio device

   - Regression fixes for TI OMAP, including a boot-time hang on am335x.

   - Lots of bug fixes for NXP i.MX, mostly addressing incorrect
     settings in devicetree files, and one revert for broken suspend.

   - Fixes for ARM Juno/Vexpress devicetree files, addressing a couple
     of schema warnings.

   - Regression fixes for qualcomm SoC specific drivers and devicetree
     files, reverting an mdt_loader change and at least pastially
     reverting some of the 5.15 DTS changes, plus some minor bugfixes"

* tag 'armsoc-fixes-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (64 commits)
  MAINTAINERS: Add Sven Peter as ARM/APPLE MACHINE maintainer
  MAINTAINERS: Add Alyssa Rosenzweig as M1 reviewer
  firmware: arm_scmi: Add proper barriers to scmi virtio device
  firmware: arm_scmi: Simplify spinlocks in virtio transport
  ARM: dts: omap3430-sdp: Fix NAND device node
  bus: ti-sysc: Use CLKDM_NOAUTO for dra7 dcan1 for errata i893
  ARM: sharpsl_param: work around -Wstringop-overread warning
  ARM: defconfig: gemini: Restore framebuffer
  ARM: dove: mark 'putc' as inline
  ARM: omap1: move omap15xx local bus handling to usb.c
  MAINTAINERS: Add Vignesh to TI K3 platform maintainership
  arm64: dts: imx8m*-venice-gw7902: fix M2_RST# gpio
  ARM: imx6: disable the GIC CPU interface before calling stby-poweroff sequence
  arm64: dts: ls1028a: fix eSDHC2 node
  arm64: dts: imx8mm-kontron-n801x-som: do not allow to switch off buck2
  ARM: dts: at91: sama7g5ek: to not touch slew-rate for SDMMC pins
  ARM: dts: at91: sama7g5ek: use proper slew-rate settings for GMACs
  ARM: at91: pm: preload base address of controllers in tlb
  ARM: at91: pm: group constants and addresses loading
  ARM: dts: at91: sama7g5ek: add suspend voltage for ddr3l rail
  ...

Apple SoC fixes for 5.15; just two MAINTAINERS updates.

- MAINTAINERS: Add Sven Peter as ARM/APPLE MACHINE maintainer
- MAINTAINERS: Add Alyssa Rosenzweig as M1 reviewer

* tag 'asahi-soc-fixes-5.15' of https://github.com/AsahiLinux/linux:
  MAINTAINERS: Add Sven Peter as ARM/APPLE MACHINE maintainer
  MAINTAINERS: Add Alyssa Rosenzweig as M1 reviewer

Link: https://lore.kernel.org/r/a50a9015-0e62-c451-4d0d-668233b35b85@marcan.stSigned-off-by: Arnd Bergmann <arnd@arndb.de>

Merge tag 'scmi-fixes-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into arm/fixes

SCMI fixes for v5.15

A few fixes addressing:
- Kconfig dependency between VIRTIO and ARM_SCMI_PROTOCOL
- Link-time error with __exit annotation for virtio_scmi_exit
- Unnecessary nested irqsave/irqrestore spinlocks in virtio transport
- Missing SMP barriers to protect accesses to SCMI virtio device

* tag 'scmi-fixes-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  firmware: arm_scmi: Add proper barriers to scmi virtio device
  firmware: arm_scmi: Simplify spinlocks in virtio transport
  firmware: arm_scmi: Remove __exit annotation
  firmware: arm_scmi: Fix virtio transport Kconfig dependency

Link: https://lore.kernel.org/r/20211007102822.27886-1-sudeep.holla@arm.comSigned-off-by: Arnd Bergmann <arnd@arndb.de>

Merge tag 'omap-for-v5.15/fixes-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/fixes

Fixes for omaps for v5.15

Few regression fixes for omaps for the v5.15-rc cycle. There is a fix
for boot time hangs that can happen on some am335x devices that started
when the pruss devicetree nodes were added. The other fixes are less
critical:

- Fix compiler warning for sysc_init_soc() that got recently introduced

- Fix external abort for am335x pruss as otherwise some am335x will hang

- Use CLKDM_NOAUTO quirk also for dra7 dcan1

- Fix older NAND device node regression for omap3-sdp

* tag 'omap-for-v5.15/fixes-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: dts: omap3430-sdp: Fix NAND device node
  bus: ti-sysc: Use CLKDM_NOAUTO for dra7 dcan1 for errata i893
  soc: ti: omap-prm: Fix external abort for am335x pruss
  bus: ti-sysc: Add break in switch statement in sysc_init_soc()

Link: https://lore.kernel.org/r/pull-1633609552-789682@atomide.comSigned-off-by: Arnd Bergmann <arnd@arndb.de>

Pull netfslib, cachefiles and afs fixes from David Howells:

 - Fix another couple of oopses in cachefiles tracing stemming from the
   possibility of passing in a NULL object pointer

 - Fix netfs_clear_unread() to set READ on the iov_iter so that source
   it is passed to doesn't do the wrong thing (some drivers look at the
   flag on iov_iter rather than other available information to determine
   the direction)

 - Fix afs_launder_page() to write back at the correct file position on
   the server so as not to corrupt data

* tag 'misc-fixes-20211007' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  afs: Fix afs_launder_page() to set correct start file position
  netfs: Fix READ/WRITE confusion when calling iov_iter_xarray()
  cachefiles: Fix oops with cachefiles_cull() due to NULL object

Merge tag 'perf-tools-fixes-for-v5.15-2021-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Fix plugin static linking with libopencsd on ARM and ARM64

 - Add missing -lstdc++ when linking with libopencsd

 - Add missing topdown metrics events to 'perf test attr'

 - Plug leak sys_event_tables list after processing JSON vendor events
   entries

 - Sync sound/asound.h copy with the kernel sources

* tag 'perf-tools-fixes-for-v5.15-2021-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  perf tests attr: Add missing topdown metrics events
  tools include UAPI: Sync sound/asound.h copy with the kernel sources
  perf build: Fix plugin static linking with libopencsd on ARM and ARM64
  perf build: Add missing -lstdc++ when linking with libopencsd
  perf jevents: Free the sys_event_tables list after processing entries