Commit graph

176,496 commits

Author SHA1 Message Date
Linus Torvalds
bd1dde8775 vfs-7.2-rc6.fixes
Please consider pulling these changes from the signed vfs-7.2-rc6.fixes tag.
 
 Thanks!
 Christian
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCam8K1wAKCRCRxhvAZXjc
 oicvAP9SaD+BOfpqRkICUIrZ/Lz+x3bIn1a0/yjgDQlPE1xJmQD+JCqIVnvUDN2U
 m89mFy/4Mq9FYnuHZ6LWMAeYYIx3OQM=
 =+294
 -----END PGP SIGNATURE-----

Merge tag 'vfs-7.2-rc6.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs fixes from Christian Brauner:
 "binfmt_misc:

   - Don't let an 'F' entry pin its own instance.

     An entry registered with 'F' opens its interpreter at registration
     time and holds that file until the entry is freed, so an entry
     nobody removes by hand is only closed once the binfmt_misc
     superblock is shut down.

     If the interpreter lives on a mount that keeps that superblock
     alive the two pin each other and the file is never closed. That's
     reachable by pointing the interpreter at the instance itself or by
     using the instance as an overlayfs lower layer, and once the mount
     namespace is gone there's nothing left to unregister through
     either.

   - Restore write access when removing an entry.

     Registering with the MISC_FMT_OPEN_FILE flag opens the interpreter
     via open_exec() which denies write access for as long as the entry
     exists, but removal only did filp_close() and never restored it.
     The inode's i_writecount stayed permanently negative and opening
     the interpreter for writing kept failing with ETXTBSY long after
     the entry was gone.

   - Use exe_file_deny_write_access() for the interpreter clone so both
     sides base their decision on the same mode.

   - Reject a flag character as the field delimiter. create_entry() pads
     the buffer with the delimiter so the field parsers terminate even
     on a truncated string, but check_special_flags() consumes flag
     characters instead of scanning for the delimiter.

     If the delimiter is itself a flag character the padding stops
     acting as a terminator and the scan keeps reading past the end of
     the allocation. Such a registration was always rejected, just only
     after the out of bounds read has already happened.

   - Don't leak the user namespace when the mount fails.

     bm_get_tree() hands its reference to get_tree_keyed() and sget_fc()
     moves it into sb->s_fs_info, but generic_shutdown_super() only
     calls ->put_super() from inside the if (sb->s_root) branch and
     bm_fill_super() can fail before either s_root or s_op is in place.

     Drop the reference in ->kill_sb() instead, which runs
     unconditionally.

  netfs:

   - Clear PG_private_2 on a copy-to-cache append failure.

   - Handle a rolling buffer allocation failure in single-object
     writeback and drop the extra folio reference
     netfs_write_folio_single() took before the append.

   - Release the previously batched readahead folios when
     rolling_buffer_load_from_ra() fails in
     netfs_prepare_read_iterator()

   - Fix the folio_queue ENOMEM in writeback by adding a mempool and
     passing gfp flags into the rolling buffer helpers.

  iomap:

   - Add a separate bio_set for iomap_split_ioend(). It can split bios
     that already come from iomap_ioend_bioset and deadlock once that
     bioset is exhausted.

  afs:

   - Set call->async for an asynchronous afs_fs_fetch_data() the way
     afs_fs_fetch_data64() already does.

   - Subtract subreq->transferred from subreq->len in
     afs_fs_fetch_data() rather than adding it.

   - Fix a UAF when sending a message"

* tag 'vfs-7.2-rc6.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  iomap: add a separate bio_set for iomap_split_ioend
  binfmt_misc: don't leak the user namespace when the mount fails
  binfmt_misc: reject a flag character as the field delimiter
  binfmt_misc: use exe_file_deny_write_access() for the interpreter clone
  binfmt_misc: restore write access when removing an entry
  binfmt_misc: don't let an 'F' entry pin its own instance
  netfs: Fix folio_queue ENOMEM in writeback by adding a mempool
  netfs: release readahead folios on iterator preparation failure
  netfs: handle single writeback rolling buffer allocation failure
  netfs: clear PG_private_2 on copy-to-cache append failure
  afs: Fix UAF when sending a message
  afs: Fix afs_fs_fetch_data() to subtract transferred from len
  afs: Fix afs_fs_fetch_data() to set call->async
2026-08-02 10:12:21 -07:00
Linus Torvalds
a84c804215 SCSI fixes on 20260802
No core changes.  The largest driver fix is the reversion of threaded
 interrupt handlers in UFS and the next is the resume deadlock fix in
 hisi_sas which extends into libsas.
 
 Signed-off-by: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
 -----BEGIN PGP SIGNATURE-----
 
 iLgEABMIAGAWIQTnYEDbdso9F2cI+arnQslM7pishQUCam86+xsUgAAAAAAEAA5t
 YW51MiwyLjUrMS4xMiwyLDImHGphbWVzLmJvdHRvbWxleUBoYW5zZW5wYXJ0bmVy
 c2hpcC5jb20ACgkQ50LJTO6YrIVcnwD/QWD/DCvLd533SY0vE2fZYVYnUVi3uzAy
 OGkbmxKtCSABAO/djRxNN1CTDtVXnhUhp/VLn0niXfy4jLmCkoWpnD2N
 =ERuj
 -----END PGP SIGNATURE-----

Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley"
 "No core changes. The largest driver fix is the reversion of threaded
  interrupt handlers in UFS and the next is the resume deadlock fix in
  hisi_sas which extends into libsas"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: ufs: core: Initialize hba->rpmbs list in ufshcd
  scsi: mpi3mr: Fix potential deadlock in mpi3mr_fault_uevent_emit
  scsi: target: Clear cmd_cnt when initial counter enrollment fails
  scsi: zfcp: Fix memory leak during adapter release by destroying gid_pn_req
  scsi: ufs: core: Revert "Delegate the interrupt service routine to a threaded IRQ handler"
  scsi: ufs: core: Cancel RTC work in active-active suspend
  scsi: scsi_debug: Fix REPORT ZONES alloc_len underflow OOB write
  scsi: target: iblock: Fix wrong PR ops NULL check for PREEMPT/RELEASE
  scsi: ufs: dt-bindings: Add missing mcq reg for qcom,sa8255p-ufshc
  scsi: libsas: Fix HA resume deadlock and hisi_sas disk-wake race
  scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer
  scsi: libiscsi: Fix stale-data leak into the SCSI sense buffer
2026-08-02 09:32:07 -07:00
Linus Torvalds
49c9f4657b dmaengine fixes for v7.2
Bunch of driver fixes for:
  - switchtec fix for register programming
  - sun6i descriptor reclaim fix
  - Couple of Intel idxd fixes for double free in error and setup failure
  - Qualcomm bam dma command element fix
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEE+vs47OPLdNbVcHzyfBQHDyUjg0cFAmpuzYcACgkQfBQHDyUj
 g0evqg//ZOIvQV12d4eOp7JCzWgfb7uPi+fx6YpMQOxhML5OIwu1nX9tZ1eV6MZB
 4G0lXPW0QhUFFzEpELp+odUJfXhgZkXaaw/yr0Km7fv1bUxKhPVvqVEHpT8EH5QT
 wivwL17ur8IzFEbjtCDNg2qoVCyzRufbDUcbEvZZFgpUaEnTrwFgfchLZZJm7Vkc
 fIaLbYN5Peq8AsRKw6TmAos0sOqEVvlfFDULtlKvkVcsheor3ZquIyLm0Czghp/+
 BNFXVLxPG3sMJjeg2c/u8E/u2GTCGbuDvmIZFcWgds59YCkB/ETIwG9smfFNew38
 mrTJfpGemqGkMx8T5x4e3yr7z2YX+7eBWBV5Js77rkpRw/Aq7iwW3emoTnIanr9c
 U3oJJCjrEpBLCKv2pNkWNo49vZbceUPCnNvsTcG9xjSFjKQEDHufLk9cQZbug125
 iB1tmqJJigfKf818rh184PS5OY6puw4UaeEWfTG3APQif688xjlfxXBmXEDZPpqR
 TGAasuIsUOk6J+glOlkhNh9el3z+kyjFFdM+UZTr0TJQahc/+PVR+Zgk1VjluAwx
 4LbEv1W+3scGELOIdZm5Kld4Mr12o2KfIEgFdlG3atlRRqyNGxnbKZ1xrSrsJ1o0
 BjoqI7ZDe5IbljlJRm+tzpmtE4P/qH1LB3OHy0gFvbfSRYQ9x/4=
 =GT2Z
 -----END PGP SIGNATURE-----

Merge tag 'dmaengine-fix-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine

Pull dmaengine fixes from Vinod Koul:

 - switchtec fix for register programming

 - sun6i descriptor reclaim fix

 - Intel idxd fixes for double free in error and setup failure

 - Qualcomm bam dma command element fix

* tag 'dmaengine-fix-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine:
  dmaengine: qcom: bam_dma: Fix command element mask field for BAM v1.6.0+
  dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev_open()
  dmaengine: idxd: fix double free of wq, engine, and group structs
  dmaengine: sun6i-dma: Fix reclaim descriptors while terminating DMA
  dmaengine: switchtec-dma: fix FIELD_GET misuse when programming SE threshold
2026-08-02 09:19:40 -07:00
Linus Torvalds
f30ca2ce7d ata fixes for 7.2-rc6
- Fix PCI resource initialization in the sata_mv driver to keep legacy
    Marvell boards functional (Rosen).
 
  - Fix ahci_ceva driver initialization error path (Radhey).
 
  - Fix libata header file to remove a kernel doc compilation warning
    (Randy).
 
  - Increase the timeout for the STANDBY IMMEDIATE command to avoid
    suspend failures with drives that are slow to respond to this command
    (Matt).
 
  - Fixes for the handling of timed out commands in the presence of
    deferred non-NCQ commands, to avoid excessive delays in executing the
    error handler (me).
 
  - Disable link power management for a couple of WD drives that have
    been identified as not functioning properly when power management is
    used (Niklas).
 
  - Fix the device iteration loop when checking for link power management
    support to correctly handle port multiplier setups (Niklas).
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQSRPv8tYSvhwAzJdzjdoc3SxdoYdgUCam01HgAKCRDdoc3SxdoY
 dv7zAP9Fc6HE7yW9XtTWmHHDC/pqVBuxIpaWXggcBMPCY4GzkgD+MgA97IsQf6QU
 4kun74jcJuZJzBbMjBNLesIzPaYQ5Qo=
 =qRqX
 -----END PGP SIGNATURE-----

Merge tag 'ata-7.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux

Pull ata fixes from Damien Le Moal:

 - Fix PCI resource initialization in the sata_mv driver to keep legacy
   Marvell boards functional (Rosen)

 - Fix ahci_ceva driver initialization error path (Radhey)

 - Fix libata header file to remove a kernel doc compilation warning
   (Randy)

 - Increase the timeout for the STANDBY IMMEDIATE command to avoid
   suspend failures with drives that are slow to respond to this command
   (Matt)

 - Fixes for the handling of timed out commands in the presence of
   deferred non-NCQ commands, to avoid excessive delays in executing the
   error handler (me)

 - Disable link power management for a couple of WD drives that have
   been identified as not functioning properly when power management is
   used (Niklas)

 - Fix the device iteration loop when checking for link power management
   support to correctly handle port multiplier setups (Niklas)

* tag 'ata-7.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux:
  ata: libata-sata: fix ata_scsi_lpm_supported() iteration
  ata: libata-core: Disable LPM on WD Green 2.5 480GB
  ata: libata-core: Disable LPM on some WD drives
  scsi: libsas: terminate deferred commands on time out
  ata: libata-scsi: schedule deferred atapi command
  ata: libata-scsi: terminate deferred commands on time out
  ata: libata-eh: Increase STANDBY IMMEDIATE timeout
  ata: libata: avoid kernel-doc warnings
  ata: ahci_ceva: fix error paths in ceva_ahci_platform_enable_resources()
  ata: sata_mv: accept 1 or 2 resources in platform probe
2026-07-31 17:05:13 -07:00
Linus Torvalds
de8c3b8e05 Hyper-V fixes for v7.2
-----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCgAxFiEEIbPD0id6easf0xsudhRwX5BBoF4FAmps/3ITHHdlaS5saXVA
 a2VybmVsLm9yZwAKCRB2FHBfkEGgXoWQB/40sKuM2KWl3Ek6CnKgGLzaUrVTxW8x
 MTRyusPZ+AOJTtasC7LBTajCa/gXSHEebPdWFeA7jyPPrv3ZhRywBDHSZoSdzd7r
 sYfBGkXovfcgAV0jKrk65wupS6ymiZkO3xAngsIzxExHIa8JiuJXyQsHIYI/oH4K
 xs+/q9OlYVYP2f7UgC1XusuXlIx2Fixxr70//kyiuBOhPq32iu77CBbFm47Ac5JC
 kKq71AXnUlDrswIo8wOJCWmfRrq0s9837zDYnwrIGTw8GvOE9Z+xmvGx+StWy2jE
 bBTCzhliXUIxxByC5msothkFSVuPIKJkepwhKYaOEUsgeV1RdhQrDgJC
 =84+i
 -----END PGP SIGNATURE-----

Merge tag 'hyperv-fixes-signed-20260731' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

Pull hyper-v fixes from Wei Liu:

 - Multiple fixes for the MSHV driver (Stanislav Kinsburskii, Wei Liu,
   Yi Xie, Yousef Alhouseen)

 - Multiple fixes for the VMBus driver (Hardik Garg, Michael Kelley,
   Sebastian Andrzej Siewior)

* tag 'hyperv-fixes-signed-20260731' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  mshv_vtl: bounds-check cpu index in vtl mmap fault handler
  mshv: Publish VP to pt_vp_array before installing the file descriptor
  Drivers: hv: vmbus: add VTL2 redirect connection ID
  mshv: Order pt_vp_array publish against irqfd assertion path
  mshv: Fix missing error code on VP allocation failure
  mshv: Fix level-triggered check on uninitialized data
  mshv: Fix race in mshv_irqfd_deassign
  mshv: Use kfree_rcu in mshv_portid_free
  mshv: Fix sleeping under spinlock in mshv_portid_alloc
  mshv: Fix duplicate GSI detection for GSI 0
  Drivers: hv: vmbus: Remove vmbus_irq_initialized
  Drivers: hv: vmbus: Replace lockdep_hardirq_threaded() with lockdep annotation
  mshv_vtl: fix fd leak in mshv_ioctl_create_vtl()
  mshv_vtl: clear hypercall output before copyout
  Drivers: hv: vmbus: Set DMA coherent mask for VMBus devices
  mshv: fix hv_input_get_system_property struct
2026-07-31 13:37:41 -07:00
Linus Torvalds
c5d3fe9d25 sound fixes for 7.2-rc6
A collection of sound fixes for the 7.2-rc6 cycle.  Again, it became
 far larger than wished; I'll throttle from now on.
 
 There are no major changes, just a normal flow of small fixes.
 The majority of them are device-specific quirks and ASoC SDCA/codec
 updates, but it includes a few ALSA core fixes as well.
 
 ALSA Core:
 - Fix for ALSA sequencer timer division-by-zero
 - Fix potential race in ALSA timer core
 - Wake up linked drain waiters on PCM stream unlink
 - Fix double-free of converter objects on UMP rawmidi error path
 
 USB-audio:
 - Fix a few potential out-of-bounds access bugs
 - Prevent stack info leak in RME Digiface status
 - Fix UAF during UMP endpoint destruction
 - Fix UAF at error handling during probe in Line6 6fire driver
 - Quirks for C-Media CM6206, Corsair Virtuoso, Razer Barracuda X 2.4,
   JKY Technology, and generic USB headphones
 
 HD-audio:
 - Quirks for HP Victus 16, HP Dragonfly Folio G3, Lenovo Legion 7, HP
   Laptop 14s, Acer Nitro 5, TongFang X6SP45xU, Infinix INBOOK X3, and
   HP Pavilion All-in-One
 
 ASoC:
 - Comprehensive cleanups and bug fixes for SoundWire/SDCA drivers
 - DMI quirks for AMD ACP/YC on Lenovo Legion 7, Acer Aspire, MSI
   Crosshair A16, and ASUS ExpertBook
 - ACPI match table entry for SOF RT5682 on Intel Nova Lake
 - Device-specific mixer / clock, irq fixes for TI TAS2562, TI TAS2781,
   Sophgo cv1800b ADC, Maxim MAX98090/98095, FSL ASRC/EASRC and Realtek
   RT5640
 -----BEGIN PGP SIGNATURE-----
 
 iQJCBAABCAAsFiEEIXTw5fNLNI7mMiVaLtJE4w1nLE8FAmprXj0OHHRpd2FpQHN1
 c2UuZGUACgkQLtJE4w1nLE/G4hAApuJ3FolNsTbzn3POYf/gFFngvfCNLnZPQumi
 XTMDq/G1tgRBHHFpKvkadWmqB/8MnxhfofKycIfQIAwzs6zIAz8ED/p1MXL/pPj7
 A7Mrn6pb583TXMeo9tt+8UTOGGECDNswUoaYfpObFBeqdGKWZdx51bpZz9KzBNee
 KAfbbijvleRJpHHumP0rPL/qMGazhlA8rBCIqWYcp+YBNLXPnEYbF4wq2hjP06Fo
 X9vNaBAuwuPAxjFVg+2LtaEQt4fAD+xOPSRlhlnPUPrmUKIe4kVTY5JYU9CW8Ywo
 8M+U3Z/gqw37Lkko/ctu6CZrgzvmsNQWjGzFmen2I0viCGklZtJrOPTGMdu3L13o
 tVoQ+nK5Pofjgk3ik5qxXu+kdZVDbSbvhQiRW50JAmhD/pLNRQxy1M6WZcS5RvDa
 6AnK0sTB6nlNVd+rfXRf6lbnOyk4JI10WEXb6eWyh1PvaGcOQm3D1Sq9sq7e+1se
 YWZJQsutOYv5wk+bnpfZMm+uhm3t61ibZYubz4nYqPDuC+yt3ZVSdDU3iIFTZwQ1
 oHAdWYbgSNd2OAVghjzomsPL+099HDgAk1uYUrIPtb2Q+pHQ8wIYSXKpGarPA5Kp
 pDnKcjfV80CT8hMGD00zOhgYXMnWNZmOPXQMq7jNaiDQPH+07Yo8tVhgg7HUxlXe
 i4oMZEk=
 =nkW9
 -----END PGP SIGNATURE-----

Merge tag 'sound-7.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A collection of sound fixes for the 7.2-rc6 cycle. Again, it became
  far larger than wished; I'll throttle from now on.

  There are no major changes, just a normal flow of small fixes. The
  majority of them are device-specific quirks and ASoC SDCA/codec
  updates, but it includes a few ALSA core fixes as well.

  ALSA Core:
   - Fix for ALSA sequencer timer division-by-zero
   - Fix potential race in ALSA timer core
   - Wake up linked drain waiters on PCM stream unlink
   - Fix double-free of converter objects on UMP rawmidi error path

  USB-audio:
   - Fix a few potential out-of-bounds access bugs
   - Prevent stack info leak in RME Digiface status
   - Fix UAF during UMP endpoint destruction
   - Fix UAF at error handling during probe in Line6 6fire driver
   - Quirks for C-Media CM6206, Corsair Virtuoso, Razer Barracuda X 2.4,
     JKY Technology, and generic USB headphones

  HD-audio:
   - Quirks for HP Victus 16, HP Dragonfly Folio G3, Lenovo Legion 7, HP
     Laptop 14s, Acer Nitro 5, TongFang X6SP45xU, Infinix INBOOK X3, and
     HP Pavilion All-in-One

  ASoC:
   - Comprehensive cleanups and bug fixes for SoundWire/SDCA drivers
   - DMI quirks for AMD ACP/YC on Lenovo Legion 7, Acer Aspire, MSI
     Crosshair A16, and ASUS ExpertBook
   - ACPI match table entry for SOF RT5682 on Intel Nova Lake
   - Device-specific mixer / clock, irq fixes for TI TAS2562, TI
     TAS2781, Sophgo cv1800b ADC, Maxim MAX98090/98095, FSL ASRC/EASRC
     and Realtek RT5640"

* tag 'sound-7.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (53 commits)
  ASoC: rt722: reset codec to fix abnormal sound
  ASoC: dt-bindings: realtek,rt5640: Make interrupts optional
  ALSA: hda/realtek: Add mute LED quirk for HP Victus 16-e0xxx (MB 88ED)
  ALSA: usb-audio: Add GET_SAMPLE_RATE quirk for C-Media CM6206
  ALSA: usb-audio: Clamp frame size in implicit-feedback mode
  ALSA: usb-audio: Fix DMA buffer out-of-bounds write when fill_max is set
  ALSA: usb-audio: Add quirk for Corsair Virtuoso (later revision)
  ALSA: pcm: wake linked drain waiters on unlink
  ASoC: amd: acp: Add DMI quirk for Lenovo Legion 7 15ASH11
  ASoC: sophgo: return 1 on volume change in cv1800b_adc_volume_set()
  ASoC: tas2781: Use correct calibration data for SINEGAIN2 register
  ASoC: SDCA: Move kcontrol search out of IRQ
  ASoC: SDCA: Switch to fixup_controls callback for IRQ registration
  ASoC: Add a component fixup_controls callback
  ASoC: SDCA: Populate IRQ data earlier
  ASoC: SDCA: Remove devm from primary IRQ cleanup
  ASoC: SDCA: Add sdca_irq_cleanup_late()
  ASoC: SDCA: Rename sdca_irq_allocate() to include devm
  ALSA: hda/realtek: Add quirk for HP Dragonfly Folio G3 2-in-1 (103c:8a05)
  ALSA:hda/realtek:ALC269 fixup for Legion 7 15ASH11 Mic Mute LED
  ...
2026-07-31 09:32:39 -07:00
Linus Torvalds
e05b559f9c iommufd v7.2 first rc pull request
Several bug fixes found by tools and fuzzing:
 
 - Incorrect domain passed during replace to ack faults
 
 - Block the access API from using dmabuf
 
 - Missing unlock on error unwind
 
 - Race seeing a partially setup vdevice in the xarray
 
 - Do not allow vdevices to have multiple stream ids in SMMUv3
 
 - Possible UAF if racing faults with domain changes
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYIAB0WIQRRRCHOFoQz/8F5bUaFwuHvBreFYQUCamu3EAAKCRCFwuHvBreF
 YfibAP9Pv3SmmvPvbJjnUo7Vfu8Ra8uLOkK7CGFJFnqvYFnZ5gD/Xd0leOM0nk7B
 /2Zvv1byPIONmNUjJP5GHRt/FiK9mAw=
 =74z6
 -----END PGP SIGNATURE-----

Merge tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd

Pull iommufd fixes from Jason Gunthorpe:
 "Several bug fixes found by tools and fuzzing:

   - Incorrect domain passed during replace to ack faults

   - Block the access API from using dmabuf

   - Missing unlock on error unwind

   - Race seeing a partially setup vdevice in the xarray

   - Do not allow vdevices to have multiple stream ids in SMMUv3

   - Possible UAF if racing faults with domain changes"

* tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd:
  iommu/iommufd: Fix IOPF group ownership UAF
  iommu/arm-smmu-v3-iommufd: Require exactly one Stream ID for a vDEVICE
  iommufd/viommu: Publish a vDEVICE only after vdevice_init() succeeds
  iommufd/viommu: Release the igroup lock on the vdevice_size error path
  iommufd: Reject DMABUF pages from the access pin path
  iommufd: Fix wrong hwpt passed to iommufd_auto_response_faults on replace
2026-07-30 15:12:31 -07:00
Linus Torvalds
3708dd9488 Power management fixes for 7.2-rc6
- Allow fast frequency switching in the ACPI CPPC library only when
    every supported control used by the driver callback has an address
    space already accepted for fast access (Christian Loehle)
 
  - Skip writes to unsupported performance controls in the ACPI CPPC
    library (Christian Loehle)
 
  - Update cppc_cpufreq_update_perf_limits() to read policy->min and
    policy->max once and, if the lockless snapshot is inconsistent,
    reduce the minimum to the observed maximum, along the lines of
    cpufreq_driver_resolve_freq() (Christian Loehle)
 
  - Fix a possible memory leak in the powernowk8_cpu_init() error
    paths (Abdun Nihaal)
 
  - Loosen the requirement on lowest nonlinear frequency != min freq in
    the amd-pstate driver that is too tight for new systems some of
    which actually have the lowest nonlinear frequency identical to the
    minimum frequency (Mario Limonciello)
 
  - Prevent amd-pstate from loading on unsupported hardware (Rong Zhang)
 
  - Address an initialization race in the schedutil governor when it
    runs on multi-CPU cpufreq policies, by making it initialize all
    per-CPU structures first and only then publish the per-CPU
    utilization update hooks (Zhongqiu Han)
 -----BEGIN PGP SIGNATURE-----
 
 iQFGBAABCAAwFiEEcM8Aw/RY0dgsiRUR7l+9nS/U47UFAmprmRgSHHJqd0Byand5
 c29ja2kubmV0AAoJEO5fvZ0v1OO1Ro0H/3llnBhbu9nq7QcFmlPqcRh2yqWozPoG
 oJTYEc/FEvPTEy65b6YxPFm64heiVTpv2gSZk0NVLnsXmDc3qNfoVFN7BvY8soPV
 X4hEZbVi/ZE84l2gmc3t9HjK+j9mxfyWiWj/QDqZvZzf3v0QN8Klo9SvzlwXlnXX
 1KdBpPPZYv7H0xIIOiL7K17JbvVTAXIwsV2SidOkm+29xArMYnHnzxqaIoh70kx7
 vvRLR0NwubHzPZt66L5TFQCwixa+O71YaQ2l1k6TOzZ5G2BEtriXjAaimAd88iAu
 Ogpie91bcERZdmoBIGtBCg9jSrHIqJE8ItugBsZw21BnIBsAKpgpJgw=
 =U/2b
 -----END PGP SIGNATURE-----

Merge tag 'pm-7.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix issues related to cpufreq, in the ACPI CPPC library and the
  generic CPPC cpufreq driver, in the powernow-k8 and amd-pstate
  drivers, and in the schedutil governor:

   - Allow fast frequency switching in the ACPI CPPC library only when
     every supported control used by the driver callback has an address
     space already accepted for fast access (Christian Loehle)

   - Skip writes to unsupported performance controls in the ACPI CPPC
     library (Christian Loehle)

   - Update cppc_cpufreq_update_perf_limits() to read policy->min and
     policy->max once and, if the lockless snapshot is inconsistent,
     reduce the minimum to the observed maximum, along the lines of
     cpufreq_driver_resolve_freq() (Christian Loehle)

   - Fix a possible memory leak in the powernowk8_cpu_init() error paths
     (Abdun Nihaal)

   - Loosen the requirement on lowest nonlinear frequency != min freq in
     the amd-pstate driver that is too tight for new systems some of
     which actually have the lowest nonlinear frequency identical to the
     minimum frequency (Mario Limonciello)

   - Prevent amd-pstate from loading on unsupported hardware (Rong
     Zhang)

   - Address an initialization race in the schedutil governor when it
     runs on multi-CPU cpufreq policies, by making it initialize all
     per-CPU structures first and only then publish the per-CPU
     utilization update hooks (Zhongqiu Han)"

* tag 'pm-7.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: powernow-k8: Fix possible memory leak in powernowk8_cpu_init()
  ACPI: CPPC: Skip writes to unsupported performance controls
  cpufreq/amd-pstate: Prevent the driver from loading on unsupported hardware
  cpufreq/amd-pstate: Loosen requirement on lowest nonlinear frequency != min freq
  cpufreq: schedutil: Publish util hooks only after all sg_cpu are initialized
  cpufreq: cppc: Sanitize lockless policy limit snapshots
  ACPI: CPPC: Check all controls for fast switching
2026-07-30 12:03:50 -07:00
Linus Torvalds
2812e64e15 This is again larger than usual: the backlog accumulated in the past weeks
is not done yet. I'm not aware of any known pending regression.
 
 Including fixes from netfilter, Bluetooth, WiFi and CAN.
 
 Current release - regressions:
 
   - eth: tun/vhost: revert avoid ptr_ring tail-drop when a qdisc is present
 
   - bluetooth: remove unnecessary hci_conn_get in create_conn_sync
 
   - can: isotp: fix timer drain order, wakeup handling and tx_gen ordering
 
 Previous releases - regressions:
 
   - core: do not send ICMP/NDISC Redirects when peer allocation fails
 
   - ipv6: take nexthop lock for f6i_list walks in replace check and notify
 
   - wifi: fix an ath12k MLO regression impacting WCN7850/QCC2072.
 
   - netfilter: nf_tables: make nft_object rhltable per table
 
   - af_unix: fix listen() succeeding on sockets in the wrong state
 
   - openvswitch: fix potential UAF on meter attach failure
 
   - bluetooth:
     - fix advertising data UAFs
     - avoid deadlocks in iso_sock_timeout
 
   - smc: fix socket use-after-free during link group termination
 
   - dpll: use pin owner's dpll ref for pin-level attribute reporting
 
   - eth: veth: convert frag_list skbs before running XDP
 
   - eth: ice: wait for reset completion in ice_resume()
 
   - eth: igc: remove napi_synchronize() in igc_down()
 
   - eth: vxlan: use pskb_network_may_pull() for transmit path header pulls
 
 Previous releases - always broken:
 
   - xsk: fix AF_XDP multi-buffer Tx descriptor reclaim
 
   - psp: fix NULL genl_sock deref race with concurrent netns teardown
 
   - netfilter: widen NAT rewrite delta to s32 in sip_help_tcp()
 
   - can: peak_usb: fix double free of transfer buffer on URB submit error
 
   - dibs: fix use-after-free of dmb_node in loopback attach/detach/unregister
 
   - sctp: prevent peer transport count overflow
 
   - eth: idpf: bound interrupt-vector register fill to the allocated array
 
   - dsa: mt7530: error out on failed reads in MT7531 PHY polling
 
 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 -----BEGIN PGP SIGNATURE-----
 
 iQJGBAABCgAwFiEEg1AjqC77wbdLX2LbKSR5jcyPE6QFAmprXncSHHBhYmVuaUBy
 ZWRoYXQuY29tAAoJECkkeY3MjxOk1gIP/RUp/tHQX75kgUHHmWJTajPJA9tRjRVn
 7Ke6pr0Os4xmMP3ZsC6xo/se2fe1fOmoNoNpK9TdTThzp+AiBov/Vqdyxnlks06f
 9Y0L3JvffKJEJ8C2NhhKBZdIt0rFtED4PiqOxmht9NpQgNLeJpJSzg9ItPdgjG9S
 De5VNqbq3vFMPEF2AeAA6I8fUPwxneziGUxDHFJ0oarpkxUyQnv1vKAeDHFB1BGs
 IA04yVcqKmL9k/yY/rS0Lj4j568a5qygDnXikRwqFnrvOumqDn0DtAMDXaDgj9b1
 S0tQaFW6vAaA2fbxUlrkiaOpNrts1W0c1XtnMJcs5suU9CsJpyw3/QDYHA0QXSac
 fNVP9aqaPLEMw+84NMavpgdnW6l0jFY070SJ+WK3kXNwWSv+D1tumQgzqYo59Lut
 HDbu24TVJmLi+m6wrUBPLN4wHzpyBf7f3HOu+LARbPgK08J0JfiwPNgb2IUJEfE5
 czMc0Dy21JLR3C1uVrHKY3EeSodz7mcCKKAl+Cpbl83xkQjmCu+OJlJm18I5+oAI
 nTLO65RAKq0XvLEt1xHl0s1pp7fAJNWHVu167GdWS7l1AvbqtLeqz7VsPCN+Qj5+
 07YP+e7XRy3ODVTOl+XrwVK44Qd12ZXq/fTAm0ABULSMvRINOai6gy7I2aLx/sqK
 0xP7ex1tCG2I
 =jLD8
 -----END PGP SIGNATURE-----

Merge tag 'net-7.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Paolo Abeni:
 "This is again larger than usual: the backlog accumulated in the past weeks
  is not done yet. I'm not aware of any known pending regression.

  Including fixes from netfilter, Bluetooth, WiFi and CAN.

  Current release - regressions:

   - bluetooth: remove unnecessary hci_conn_get in create_conn_sync

   - can: isotp: fix timer drain order, wakeup handling and tx_gen
     ordering

   - eth:
       - tun/vhost: revert avoid ptr_ring tail-drop when a qdisc is
         present

  Previous releases - regressions:

   - core: do not send ICMP/NDISC Redirects when peer allocation fails

   - ipv6: take nexthop lock for f6i_list walks in replace check and
     notify

   - wifi: fix an ath12k MLO regression impacting WCN7850/QCC2072.

   - netfilter: nf_tables: make nft_object rhltable per table

   - af_unix: fix listen() succeeding on sockets in the wrong state

   - openvswitch: fix potential UAF on meter attach failure

   - bluetooth:
       - fix advertising data UAFs
       - avoid deadlocks in iso_sock_timeout

   - smc: fix socket use-after-free during link group termination

   - dpll: use pin owner's dpll ref for pin-level attribute reporting

   - eth:
       - veth: convert frag_list skbs before running XDP
       - ice: wait for reset completion in ice_resume()
       - igc: remove napi_synchronize() in igc_down()
       - vxlan: use pskb_network_may_pull() for transmit path header pulls

  Previous releases - always broken:

   - xsk: fix AF_XDP multi-buffer Tx descriptor reclaim

   - psp: fix NULL genl_sock deref race with concurrent netns teardown

   - netfilter: widen NAT rewrite delta to s32 in sip_help_tcp()

   - can: peak_usb: fix double free of transfer buffer on URB submit error

   - dibs: fix use-after-free of dmb_node in loopback attach/detach/unregister

   - sctp: prevent peer transport count overflow

   - dsa: mt7530: error out on failed reads in MT7531 PHY polling

   - eth:
       - idpf: bound interrupt-vector register fill to the allocated array"

* tag 'net-7.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (156 commits)
  qede: sync udp_tunnel ports outside qede_lock in the recovery path
  net: openvswitch: fix potential UAF on meter attach failure
  octeontx2-pf: Set correct sequence for carrier off and tx queue stop
  net: libwx: fix FDIR ATR queue mismatch for software VLAN packets
  net: dsa: realtek: use devm_mutex_init for l2_lock
  net: dsa: realtek: use devm_mutex_init for vlan_lock
  net: dsa: realtek: use devm_mutex_init for regmap lock
  net: dsa: realtek: rtl8365mb: use devm_mutex_init for mib_lock
  ptp: netc: fix potential interrupt storm caused by incorrect unbind order
  net: mana: Return error code from mana_create_rxq()
  net: openvswitch: fix skb leak on flow key update failure during ct
  net: openvswitch: fix skb leak on flow key update failure during recirculation
  net: stmmac: Fix E2E delay mechanism
  net: dsa: mt7530: error out on failed reads in MT7531 PHY polling
  net: dsa: mt7530: error out on failed reads in ATC/VTCR command polling
  net: dsa: mt7530: check bus->read() errors in the MDIO regmap backend
  Revert "tun/tap: add ptr_ring consume helper with netdev queue wakeup"
  Revert "vhost-net: wake queue of tun/tap after ptr_ring consume"
  Revert "ptr_ring: move free-space check into separate helper"
  Revert "tun/tap & vhost-net: avoid ptr_ring tail-drop when a qdisc is present"
  ...
2026-07-30 09:18:49 -07:00
Simon Schippers
8f83be72d9 Revert "vhost-net: wake queue of tun/tap after ptr_ring consume"
This reverts commit baf808fe4f.

There is no netdev queue left to wake after reverting
commit 1d6e569b7d ("tun/tap & vhost-net: avoid ptr_ring tail-drop
when a qdisc is present").

Signed-off-by: Simon Schippers <simon.schippers@tu-dortmund.de>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://patch.msgid.link/20260728092240.250257-4-simon.schippers@tu-dortmund.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-07-29 17:12:27 -07:00
Simon Schippers
6bc85579c3 Revert "ptr_ring: move free-space check into separate helper"
This reverts commit fba362c17d.

__ptr_ring_check_produce() has no users left after reverting
commit 1d6e569b7d ("tun/tap & vhost-net: avoid ptr_ring tail-drop
when a qdisc is present").

Signed-off-by: Simon Schippers <simon.schippers@tu-dortmund.de>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://patch.msgid.link/20260728092240.250257-3-simon.schippers@tu-dortmund.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-07-29 17:12:27 -07:00
Linus Torvalds
fc46aed51f Arm:
- Fix a tiny buglet when propagating the deactivation of an interrupt
   from a nested guest, which happened to trigger a gold plated CPU bug
   on a particular implementation
 
 - Fix a race between LPI unmapping and mapping, resulting in leaked
   LPIs
 
 - Make LPI mapping more robust on memory allocation failure
 
 - Fix the handling of the EL2 tracing clock being disabled
 
 - A couple of Sashiko-driven fixes for corner cases in the EL2 tracing
   code
 
 - Add missing sysreg tracepoint for the EL2 code
 
 - Tidy-up the mutual exclusion of guest-memfd and MTE
 
 - Update Fuad's email address to point to @linux.dev
 
 s390:
 
 - several fixes for PCI passthru in s390 kvm
 
 - fix a 7.2-rc regression in the adapter interrupt mapping code
 
 x86:
 
 - Add memory clobber to asm for VMX instructions; without one, the compiler
   could reorder them in troublesome ways because "asm volatile" and "asm goto"
   only protect against removal of the asm.
 
 - Cancel delayed I/O APIC EOI handling before destroying vCPUs
 
 - Check all address spaces (normal and SMM) for write tracking and large
   pages, not just the current one.
 
 - Always update x2APIC MSR intercepts for L1 when AVIC is deactivated,
   even if not running L1.  If the deactivation is VM-wide rather than being
   caused by something in L2's vCPU state, after a nested vmexit L1 will
   be able to access the host's APIC state.
 -----BEGIN PGP SIGNATURE-----
 
 iQFIBAABCgAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmpqc1YUHHBib256aW5p
 QHJlZGhhdC5jb20ACgkQv/vSX3jHroNmwwgAqmInlLpGii9THsWg6+KAfXynx7Ry
 ZWgseEX5THgDKJOsaNU+wbZQTkMnTt2hKZ7zw3o28+S5Q4mza3J/8j9k1zRI2Ah9
 eZhTpqrl4Z2bTMgYFfzlwpjvVT5jbc7BrO6l0Egf4jDcyatz5aNQ4QK7rITVNHdT
 rCMOX0tLUI14JjVWn0v9NVg55RK90vK+5l455RJFxAFM5yVmmY2OBWoPDgK8Y/MA
 b0UuEwI81kBTwRpMtZ2Lu4pe5d+FPdMrRrqNRRKVtv+fxPmSHi9oXbM+gomto4XJ
 /cDxrVBY3Svl/dObLO5UESl6AoRHgH6/Gz5iIaBHsGDuloU5x/pG9cx8HQ==
 =C9UQ
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "arm64:

   - Fix a tiny buglet when propagating the deactivation of an interrupt
     from a nested guest, which happened to trigger a gold plated CPU
     bug on a particular implementation

   - Fix a race between LPI unmapping and mapping, resulting in leaked
     LPIs

   - Make LPI mapping more robust on memory allocation failure

   - Fix the handling of the EL2 tracing clock being disabled

   - A couple of Sashiko-driven fixes for corner cases in the EL2
     tracing code

   - Add missing sysreg tracepoint for the EL2 code

   - Tidy-up the mutual exclusion of guest-memfd and MTE

   - Update Fuad's email address to point to @linux.dev

  s390:

   - several fixes for PCI passthru in s390 kvm

   - fix a 7.2-rc regression in the adapter interrupt mapping code

  x86:

   - Add memory clobber to asm for VMX instructions; without one, the
     compiler could reorder them in troublesome ways because "asm
     volatile" and "asm goto" only protect against removal of the asm.

   - Cancel delayed I/O APIC EOI handling before destroying vCPUs

   - Check all address spaces (normal and SMM) for write tracking and large
     pages, not just the current one.

   - Always update x2APIC MSR intercepts for L1 when AVIC is deactivated,
     even if not running L1.  If the deactivation is VM-wide rather than being
     caused by something in L2's vCPU state, after a nested vmexit L1 will
     be able to access the host's APIC state"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (21 commits)
  KVM: SVM: Update x2APIC MSR intercepts if AVIC is inhibited while L2 is active
  KVM: x86/mmu: Check all address spaces before skipping unsync
  KVM: x86/mmu: Check write tracking in all address spaces
  KVM: x86: Cancel delayed I/O APIC EOI handling before destroying vCPUs
  KVM: VMX: add memory clobber to asm for VMX instructions
  KVM: s390: Fall back to short-term pinning in MAP ioctl
  KVM: s390: pci: Validate AIBV and AISB before pinning guest pages
  KVM: s390: pci: Fix resource leak on IRQ registration failure
  KVM: s390: pci: Fix NULL dereference on AIBV allocation failure
  KVM: s390: pci: Fix missing error codes and memory unaccounting
  KVM: s390: pci: Fix memory accounting for pinned/unpinned pages
  KVM: s390: pci: Reject adapter interrupt forwarding if already enabled
  KVM: arm64: Reject guest_memfd memslots when the VM has MTE
  KVM: arm64: Add missing hyp_enter when trapping sysreg
  KVM: arm64: Fix hyp_trace_desc allocation size in hyp_trace_load()
  KVM: arm64: Fix potential leak in hyp_trace_buffer_alloc_bpages_backing
  KVM: arm64: Fix hyp_trace clock disabling
  KVM: arm64: vgic: Mitigate potential LPI registration failure
  KVM: arm64: vgic: Fix race between LPI release and re-registration
  KVM: arm64: Update Fuad Tabba's email address
  ...
2026-07-29 14:50:07 -07:00
Damien Le Moal
de202d2251 scsi: libsas: terminate deferred commands on time out
If a command times out while we have deferred non-NCQ commands waiting to
be issued, the SCSI EH task is not immediately woken up as the waiting
deferred commands are never issued nor completed, thus leaving the SCSI
host in a busy state (shost->host_failed != scsi_host_busy(shost)) which
prevents the SCSI EH task from being woken up. Eventually, when the
deferred commands also time out, the SCSI EH task is woken up and the
timeout processing occurs.

Avoid this unnecessary additional SCSI EH wake up time with the same
method as implemented in libata-scsi, using the eh_timed_out SCSI host
template operation. The function sas_eh_timed_out() implements this
operation and executes the function ata_scsi_retry_deferred_qc()
for SATA devices.

Co-developed-by: Igor Pylypiv <ipylypiv@google.com>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Fixes: 0ea84089db ("ata: libata-scsi: avoid Non-NCQ command starvation")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Tested-by: Igor Pylypiv <ipylypiv@google.com>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-07-29 10:52:04 +09:00
Damien Le Moal
2e1d2e65e7 ata: libata-scsi: terminate deferred commands on time out
If a command times out while we have deferred non-NCQ commands waiting to
be issued, the SCSI EH task is not immediately woken up as the waiting
deferred commands are never issued nor completed, thus leaving the SCSI
host in a busy state (shost->host_failed != scsi_host_busy(shost)) which
prevents the SCSI EH task from being woken up. Eventually, when the
deferred commands also time out, the SCSI EH task is woken up and the
timeout processing occurs.

Avoid this unnecessary SCSI EH task wake-up additional time by scheduling
a retry of all waiting deferred QCs, using the eh_timed_out SCSI host
template operation. The function ata_scsi_eh_timed_out() is introduced to
implement this operation.

However, terminating deferred commands with DID_REQUEUE to force a retry
by calling the function ata_scsi_requeue_deferred_qc() may still keep the
SCSI host in a busy state because the block layer may immediately re-issue
these commands. The solution to this is to schedule libata EH for the
port which suffered the command timeout to prevent accepting any new
command. ata_scsi_requeue_deferred_qc() is modified to add a call to
ata_port_schedule_eh() for this purpose.

In addition to this change, ata_scsi_requeue_deferred_qc() is also
modified to take a new timedout_scmd scsi command argument which indicates
the SCSI command that timed out. With this additional argument,
ata_scsi_requeue_deferred_qc() can now also terminate with DID_TIME_OUT
any timed out deferred qc, which simplifies ata_scsi_cmd_error_handler().
In this case, ata_scsi_requeue_deferred_qc() returns SCSI_EH_DONE, with
this return value propagated back to the ata_scsi_eh_timed_out() operation
to indicate to scsi_timeout() that the timed out command was handled and
no further processing is needed.

For non-timed out deferred qc that need to be retried,
ata_scsi_requeue_deferred_qc() returns SCSI_EH_NOT_HANDLED, thus
indicating to scsi_timeout() that the timed out command needs to go
through the SCSI EH (and libata EH) processing by adding it to the EH work
queue with scsi_eh_scmd_add().

One side effect of these changes is that the function atapi_qc_complete()
needs to be modified to ensure that a deferred ATAPI command that needs
to be retried is completed with DID_REQUEUE instead of the default
SAM_STAT_GOOD status, and a command that timed out is completed with
DID_TIME_OUT instead of SAM_STAT_CHECK_CONDITION.

Fixes: 0ea84089db ("ata: libata-scsi: avoid Non-NCQ command starvation")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Igor Pylypiv <ipylypiv@google.com>
Tested-by: Igor Pylypiv <ipylypiv@google.com>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-07-29 10:51:57 +09:00
Pauli Virtanen
af24e338bf Bluetooth: ISO: fix race of kfree vs kref_get_unless_zero
hci_conn::iso_data is accessed and modified without lock or RCU.
This leads to a race

    [Task hdev->workqueue]                 	[Task 2]
    iso_recv                                    iso_conn_put(conn)
      conn = LOAD hcon->iso_data                  iso_conn_free(conn)
      iso_conn_hold_unless_zero(conn)               hcon->iso_data = NULL
                                                    kfree(conn)
        kref_get_unless_zero(&conn->ref) /* UAF */

and also to races in iso_conn_add() vs. iso_conn_free().

Fix by adding spinlock hci_conn::proto_lock and using it to guard
hci_conn::iso_data.

Fixes: dc26097bdb ("Bluetooth: ISO: Use kref to track lifetime of iso_conn")
Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
2026-07-28 16:13:12 -04:00
Paolo Bonzini
a7fe52b5ab KVM/arm64 fixes for 7.2, take #3
- Fix a tiny buglet when propagating the deactivation of an interrupt
   from a nested guest, which happened to trigger a gold plated CPU bug
   on a particular implementation
 
 - Fix a race between LPI unmapping and mapping, resulting in leaked
   LPIs
 
 - Make LPI mapping more robust on memory allocation failure
 
 - Fix the handling of the EL2 tracing clock being disabled
 
 - A couple of Sashiko-driven fixes for corner cases in the EL2 tracing
   code
 
 - Add missing sysreg tracepoint for the EL2 code
 
 - Tidy-up the mutual exclusion of guest-memfd and MTE
 
 - Update Fuad's email address to point to @linux.dev
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEn9UcU+C1Yxj9lZw9I9DQutE9ekMFAmpiPKIACgkQI9DQutE9
 ekNhIA//SQCC53RVQjg5XjW/pfHLanEnQycyyYU7mY8Aw8+TstztgAL7TRTITuUY
 wPldTBIuBS/f49KP4FIqynUNznFrtsBEYNxpK6PaLzCAvszcc1SAHzkWbK7j8SRn
 cWm1Zq+0RIkH4pluLiqZZjsBb6gKz8dGJCD7k+qoYPrsPMccltMZtzn2db4zWfb7
 b5PRUNm2KncuHt/gHfPxCHo9RFe/71ll6V4XKNe3H5UY064OnCwVZ6ju8zKJu+MD
 5MLuyKy1lLbKHZEJibAI/Bn6GNU3q1V50GbpWmnAB66Kh4Vlj6ST+2qaxAmSxSho
 GqAA1Ba5NTSA8C7fh/+o9vFf13UJ5lAQRV9xOwH3lXnlHzGhtsd8+4H/bSte1uP8
 tMSzODn2QzTAO9V1ooIhbpQvlG085hjA1onzCs5F8Z+FVlkDOTV5ZTZb1wq2CP66
 1QKlcBDO5LaBu3zJBC0DugoB7bpeaeVeOf6U/a4+W4WzX3En0va0oMSmTZbpEhdu
 z97ttdadLIqL6a7oKwvZbXdQz4TtfExKFYVWxVrhydBpPR4AT6zNPFEJcEzt2zYb
 Gf9OzgwKbuJxgtz9dvMWVWEwB6awSfIv6spaSBHMrhWPbaeCt1vS8slA2aMnGQ9o
 UkcgIRULU7TKv/iilnEcXRuqnQkM94Rfz7rc3Ycp9sHweTXjRP0=
 =a3wu
 -----END PGP SIGNATURE-----

Merge tag 'kvmarm-fixes-7.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 7.2, take #3

- Fix a tiny buglet when propagating the deactivation of an interrupt
  from a nested guest, which happened to trigger a gold plated CPU bug
  on a particular implementation

- Fix a race between LPI unmapping and mapping, resulting in leaked
  LPIs

- Make LPI mapping more robust on memory allocation failure

- Fix the handling of the EL2 tracing clock being disabled

- A couple of Sashiko-driven fixes for corner cases in the EL2 tracing
  code

- Add missing sysreg tracepoint for the EL2 code

- Tidy-up the mutual exclusion of guest-memfd and MTE

- Update Fuad's email address to point to @linux.dev
2026-07-28 17:43:23 +02:00
David Howells
1d78d56c43
netfs: Fix folio_queue ENOMEM in writeback by adding a mempool
Fix the handling of folio_queue allocation failure in writeback by adding a
mempool and passing in gfp_t flags to the rolling buffer functions that
allocate memory, using the mempool if gfp != GFP_KERNEL.

This is then extended upwards and the gfp to be used for a request is stored
in the netfs_io_request struct and is then used for both requests and
subrequests, eliminating the sleeping loops there.

The failure caused:

    folio != NULL
    WARNING: fs/netfs/write_issue.c:603 at netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603, CPU#3: syz.0.17/5919

Fixes: cd0277ed0c ("netfs: Use new folio_queue data type and iterator instead of xarray iter")
Reported-by: syzbot+0da43efa72f88bd3a8af@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=0da43efa72f88bd3a8af
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://patch.msgid.link/20260727130716.1099906-5-dhowells@redhat.com
Tested-by: syzbot+0da43efa72f88bd3a8af@syzkaller.appspotmail.com
cc: Paulo Alcantara <pc@manguebit.org>
cc: Yun Zhou <yun.zhou@windriver.com>
cc: Matthew Wilcox <willy@infradead.org>
cc: Christoph Hellwig <hch@infradead.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
2026-07-28 15:42:31 +02:00
Matt Vollrath
1e024d2b41 ata: libata-eh: Increase STANDBY IMMEDIATE timeout
Correct a previous change (see Fixes) which reduced the standby timeout
from 30 to 5 seconds. Increase it to 15 seconds.

I was troubleshooting an error spotted during system suspend:

    [ 1217.152867] ata1.00: Entering standby power mode
    [ 1222.322948] ata1.00: qc timeout after 5000 msecs (cmd 0xe0)
    [ 1222.324010] ata1.00: STANDBY IMMEDIATE failed (err_mask=0x4)

This drive is a Samsung 870 EVO SSD in good SMART standing, and I wasn't
aware of any reason it should be taking so long to standby. The issue is
intermittent, but I observed it sometimes taking 7 seconds to manually
standby. I assume this was interruption of background maintenance after
a power outage.

As a desktop user, I would prefer to wait the extra 2 seconds at suspend
to let the drive finish its business rather than drop the rails from
under it.

The change from 30 to 5 seconds was implicit when switching suspend
from START STOP UNIT to an internal command with no timeout table entry.
No reason was stated for the change.

Fixes: aa3998dbeb ("ata: libata-scsi: Disable scsi device manage_system_start_stop")
Cc: stable@vger.kernel.org
Signed-off-by: Matt Vollrath <tactii@gmail.com>
Assisted-by: Claude:claude-5-fable
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
2026-07-28 12:04:17 +09:00
Randy Dunlap
aec49a34d9 ata: libata: avoid kernel-doc warnings
Modify comments to prevent kernel-doc warnings:
- use "/*" for a non-kernel-doc comment
- add a Returns: section for ata_id_major_version()

Warning: include/linux/ata.h:770 Cannot find identifier on line:
 *
Warning: include/linux/ata.h:782 function parameter 'id' not described in 'ata_id_sct_data_tables'
Warning: include/linux/ata.h:782 expecting prototype for Word(). Prototype was for ata_id_sct_data_tables() instead
Warning: include/linux/ata.h:820 No description found for return value of 'ata_id_major_version'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
2026-07-28 12:04:17 +09:00
Eric Joyner
97ac08560d ethtool: Embed FEC hist ranges as buffer in struct
When a driver's .get_fec_stats() handler is called and the driver
supports FEC histogram stats, the driver supplies the histogram bin
ranges via a pointer.  This pointer is assigned while under the netdev
ops lock in fec_prepare_data(), but the actual data is only read after
the lock is released; so this allows the driver to change the ranges
(e.g. from another .get_fec_stats() call) while the current call chain
is reading them in fec_fill_reply().

Fix this by adding an ethtool core-owned buffer, ranges_buf, to struct
ethtool_fec_hist. Drivers whose ranges are built dynamically (currently
just mlx5) fill ranges_buf and then point the existing ranges pointer at
it, giving ethtool a consistent copy that stays valid after the netdev
ops lock is dropped and later in fec_fill_reply(). Drivers whose ranges
are compile-time constants (bnxt, netdevsim) are unaffected by the
potential race and keep setting the existing ranges pointer to their
constant array, without making copies.

Fixes: cc2f081299 ("ethtool: add FEC bins histogram report")
Signed-off-by: Eric Joyner <eric.joyner@amd.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20260723041342.39238-1-eric.joyner@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-07-27 18:23:07 -07:00
Linus Torvalds
62cc902415 13 hotfixes. All are cc:stable. 11 are for MM. All are singletons -
please see the changelogs for details.
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCamfLHAAKCRDdBJ7gKXxA
 jrrMAQDQHf+VGi/lZaxtgfLv0OThODhzzckRI2dcTGG66YX/DQD/V4aTndWFUUpM
 j1aSODTTWeKi3Ija4E3dA7SIaZkqSAI=
 =s/6H
 -----END PGP SIGNATURE-----

Merge tag 'mm-hotfixes-stable-2026-07-27-14-18' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "13 hotfixes. All are cc:stable. 11 are for MM. All are singletons -
  please see the changelogs for details"

* tag 'mm-hotfixes-stable-2026-07-27-14-18' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  fs/proc/task_mmu: fix PAGEMAP_SCAN written state for PMD holes
  mm/hugetlb: fix list corruption in allocate_file_region_entries()
  mm: mglru: fix stale batch updates after memcg reparenting
  selftest: fix headers in fclog.c
  ocfs2: fix boundary check in ocfs2_check_dir_entry() to use buffer offset
  mm/percpu-km: fix bitmap overflow and accounting in pcpu_create_chunk()
  mm/util: don't read __page_2 for order-1 folios in snapshot_page()
  mm/hugetlb: fix swap entry corruption when clearing uffd-wp at fork()
  mm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE
  fs/proc/task_mmu: fix PAGEMAP_SCAN written state for unpopulated ptes
  userfaultfd: wait on source PMD during UFFDIO_MOVE
  lib: test_hmm: use device devt for coherent device range selection
  mm/vmstat: fold stranded per-cpu node stats when a node comes online
2026-07-27 14:36:26 -07:00
Charles Keepax
bf1b7821f8
ASoC: SDCA: Move kcontrol search out of IRQ
Now that the IRQs are always registered after all the ALSA
controls are created it is possible to search for the control
at the point the IRQ is requested. Move the control search out
of the IRQ handler and do it at IRQ request time.

This also fixes a potential issue when the card was torn down
and reprobed without destroying the codec device, the kctl
pointer stored by the IRQ handler would not be updated to the
new control on the second probe.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20260721143636.361814-8-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2026-07-27 18:47:09 +01:00
Charles Keepax
3e81e2fb21
ASoC: Add a component fixup_controls callback
A card level fixup_controls callback was added in:

commit df4d27b19b ("ASoC: Introduce 'fixup_controls' card method")

This allowed the machine driver to take actions after all the
card controls have been added. However, there are times when a
codec driver would also want to do things like obtain references
to controls for later use, which require all the controls to be
present. Add a component level fixup_controls callback, echoing
the card level option.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20260721143636.361814-6-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2026-07-27 18:47:07 +01:00
Charles Keepax
050406cbd6
ASoC: SDCA: Populate IRQ data earlier
Currently, the IRQ data (attached Entity/Control/etc) is populated
as the IRQ is requested. However, this can cause issues as
occasionally the setup process wants to access specifics of
an IRQ before the IRQ is actually enabled. To facilitate this
cache all the IRQ data during sdca_irq_populate_early() and make
sdca_irq_populate() simply request the outstanding IRQs. This
also has the advantage that sdca_irq_populate() can now just
iterate through the IRQ array which is much smaller/faster than
going through every Entity in the Function for Controls.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20260721143636.361814-5-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2026-07-27 18:47:06 +01:00
Charles Keepax
0880082c27
ASoC: SDCA: Remove devm from primary IRQ cleanup
To provide greater flexibility on when the IRQs are requested for
client drivers don't use devm for the primary IRQ request/cleanup
helper functions.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20260721143636.361814-4-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2026-07-27 18:47:05 +01:00
Charles Keepax
f18e97fa7f
ASoC: SDCA: Add sdca_irq_cleanup_late()
The SDCA IRQs are split into two groups, those registered at bus probe
time (basically just FDL) and those registered at component time.
There currently exists only a single cleanup function, if the FDL IRQ
is freed at component time, then nothing would re-register it if the
component is probed again. But the IRQs depending on a component need
to be freed if the card is destroyed so they can't use stale
components.

Split the clean up into two functions one for the component level and
one for the bus level.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20260721143636.361814-3-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2026-07-27 18:47:04 +01:00
Charles Keepax
4ecef577d1
ASoC: SDCA: Rename sdca_irq_allocate() to include devm
Make it more clear sdca_irq_allocate() uses devm allocations by adding
it into the name.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20260721143636.361814-2-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2026-07-27 18:47:03 +01:00
Xingui Yang
3dbbbf656b scsi: libsas: Fix HA resume deadlock and hisi_sas disk-wake race
Commit fbefe22811 ("scsi: libsas: Don't always drain event workqueue
for HA resume") introduced sas_resume_ha_no_sync() to avoid a deadlock:
the PHYE_RESUME_TIMEOUT handler, running on the HA event workqueue,
calls sas_deform_port() -> sas_destruct_devices(), which removes SCSI
devices and waits for the host to become runtime-active. But the host
cannot resume until sas_resume_ha() -> sas_drain_work() returns, and the
drain is blocked on that very handler.

However skipping the drain reintroduces a race: hisi_sas returns from
resume before all PHY UP work and libsas discovery work finish. The
controller may then autosuspend while disks are still waking up. The
disks issue IO to a suspended controller, the IO fails, and the disks
get disabled.

Fix the deadlock at its source by moving the PHYE_RESUME_TIMEOUT
notification to after sas_drain_work(). By then the host resume is about
to complete, so device removal through device_link no longer blocks on
the resume and the cycle is broken.

With the deadlock gone, restore sas_resume_ha() (the draining variant)
in hisi_sas and remove sas_resume_ha_no_sync().

The reorder is safe for the other libsas consumers (isci, pm8001,
aic94xx, mvsas). During suspend, sas_suspend_devices() calls
sas_notify_lldd_dev_gone() for each device, which sets dev->lldd_dev to
NULL. When scsi_unblock_requests re-enables I/O in resume, any I/O to a
timed-out phy's disk is immediately rejected by the LLDD before reaching
hardware: isci returns SAS_DEVICE_UNKNOWN (mapped to DID_BAD_TARGET),
and pm8001 returns SAS_PHY_DOWN (mapped to DID_NO_CONNECT). Both
complete directly via scsi_done() without entering SCSI EH. This is
identical in both the old and new ordering since lldd_dev_gone runs
during suspend, before resume. The reorder only affects when the
PHYE_RESUME_TIMEOUT handler runs (synchronized by sas_drain_work()
vs. asynchronous after resume returns), not whether I/O can reach the
device. aic94xx and mvsas do not register any PM ops and never reach
this code path.

Fixes: fbefe22811 ("scsi: libsas: Don't always drain event workqueue for HA resume")
Signed-off-by: Xingui Yang <yangxingui@huawei.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Link: https://patch.msgid.link/20260716081145.3950172-1-yangxingui@huawei.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-07-26 15:34:03 -04:00
Linus Torvalds
4235cb24ec vfs-7.2-rc5.fixes
Please consider pulling these changes from the signed vfs-7.2-rc5.fixes tag.
 
 Thanks!
 Christian
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCamYljAAKCRCRxhvAZXjc
 ogWyAPwORZDIIsRiAQbnPs+OkYszuWCY29OeUrTf+m3z+tBTLwD+NUFtpH5XIcYJ
 3jHtGXPoHjEaOVsNyIdxwnOxWfo+6ws=
 =VNq0
 -----END PGP SIGNATURE-----

Merge tag 'vfs-7.2-rc5.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs fixes from Christian Brauner:

 - vfs: Preserve the ACL_DONT_CACHE state in forget_cached_acl().

   ACL_DONT_CACHE is meant to be a permanent opt-out from ACL caching
   which FUSE relies on for servers that don't negotiate FUSE_POSIX_ACL.
   The helper replaced it with ACL_NOT_CACHED, silently re-enabling the
   cache, and as fuse doesn't invalidate the cache for such servers a
   properly timed get_acl() returned stale ACLs. Comes with a fuse
   selftest reproducing this.

 - pidfs:

     - Preserve PIDFD_THREAD when a thread pidfd is reopened via
       open_by_handle_at(). PIDFD_THREAD shares the O_EXCL bit which
       do_dentry_open() strips after the flags have been validated, so
       the reopened pidfd silently became a process pidfd. Comes with a
       selftest.

     - Add a pidfs_dentry_open() helper so the regular pidfd allocation
       path and the file handle path share the code that forces O_RDWR
       and reapplies the pidfd flags that do_dentry_open() strips.

     - Handle FS_IOC32_GETVERSION in the compat ioctl path.

     - Make pidfs_ino_lock static.

 - iomap:

     - Fix the block range calculation in ifs_clear_range_dirty() so a
       partial clear doesn't drop the dirty state of blocks the range
       only partially covers.

     - Support invalidating partial folios so a partial truncate or hole
       punch with blocksize < foliosize doesn't leave stale dirty bits
       behind.

     - Only set did_zero when iomap_zero_iter() actually zeroed
       something.

     - Guard ifs_set_range_dirty() and ifs_set_range_uptodate() against
       zero-length ranges where the unsigned last-block calculation
       underflows and bitmap_set() writes far beyond the ifs->state
       allocation.

     - Don't merge ioends with different io_private values as the merge
       could leak or corrupt the private data of the individual ioends.

 - exec:

     - Raise bprm->have_execfd only once the binfmt_misc interpreter has
       actually been opened. The flag was set as soon as a matching 'O'
       or 'C' entry was found. If the interpreter open failed with
       ENOEXEC the exec fell through to the next binary format with
       have_execfd raised but no executable staged and begin_new_exec()
       NULL derefed past the point of no return.

     - Fix an unsigned loop counter wrap in transfer_args_to_stack() on
       nommu. An overlong argument or environment string pushes bprm->p
       below PAGE_SIZE, the stop index becomes zero, and the loop never
       terminates, wrapping its counter and copying garbage from in
       front of the page array into the new process stack.

     - Make binfmt_elf_fdpic only honour the first PT_INTERP like
       binfmt_elf does. Each additional PT_INTERP overwrote the previous
       interpreter, leaking the name allocation and the interpreter file
       reference together with the write denial open_exec() took,
       leaving the file unwritable for as long as the system runs.

 - overlayfs:

     - Compare the full escaped xattr prefix including the trailing dot.
       An xattr like "trusted.overlay.overlayfoo" was misclassified as
       an escaped overlay xattr.

     - Check read access to the copy_file_range() source with the
       source's mounter credentials.

 - super: Thawing a filesystem whose block device was frozen with
   bdev_freeze() deadlocked. Dropping the last block layer freeze
   reference from under s_umount ends up in fs_bdev_thaw() which
   reacquires s_umount on the same task. Pin the superblock with an
   active reference instead and call bdev_thaw() without holding
   s_umount.

 - procfs: Return EACCES instead of success when the ptrace access check
   for namespace links fails.

 - afs: Use afs_dir_get_block() rather than afs_dir_find_block() for
   block 0 in afs_edit_dir_remove(), matching afs_edit_dir_add().

 - Push the memcg gating of ->nr_cached_objects() down into the btrfs
   and shmem callbacks instead of skipping every callback during
   non-root memcg reclaim. The blanket check short-circuited XFS whose
   inode reclaim hook is intentionally driven from per-memcg contexts to
   free memcg-charged slab.

 - eventpoll: Pin files while checking reverse paths.

   Since struct file became SLAB_TYPESAFE_BY_RCU a concurrent close
   could free and recycle the file under the check which then took and
   dropped the f_lock of whatever live file now occupies that slot.

* tag 'vfs-7.2-rc5.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (24 commits)
  super: fix emergency thaw deadlock on frozen block devices
  pidfs: make pidfs_ino_lock static
  eventpoll: pin files while checking reverse paths
  fs: push nr_cached_objects memcg gating into individual filesystems
  afs: Fix afs_edit_dir_remove() to get, not find, block 0
  iomap: prevent ioend merge when io_private differs
  iomap: add comments for ifs_clear/set_range_dirty()
  iomap: fix out-of-bounds bitmap_set() with zero-length range
  iomap: fix incorrect did_zero setting in iomap_zero_iter()
  iomap: support invalidating partial folios
  iomap: correct the range of a partial dirty clear
  fs/super: fix emergency thaw double-unlock of s_umount
  pidfs: handle FS_IOC32_GETVERSION in compat ioctl
  ovl: check access to copy_file_range source with src mounter creds
  proc: Fix broken error paths for namespace links
  pidfs: add pidfs_dentry_open() helper
  selftests/pidfd: check PIDFD_THREAD survives open_by_handle_at()
  pidfs: preserve thread pidfds reopened by file handle
  ovl: fix trusted xattr escape prefix matching
  selftests/fuse: add ACL_DONT_CACHE regression test
  ...
2026-07-26 12:22:57 -07:00
Linus Torvalds
09b2124a47 Char/Misc driver fixes for 7.2-rc5
Here are a number of small char/misc/etc. driver fixes for 7.2-rc5 that
 resolve a bunch of different reported issues.  Included in here are:
   - rust_binder error message reporting fix
   - stratix10-svc firmware driver fixes
   - mei driver fix
   - intel_th hardware tracing driver fix
   - comedi driver fix
   - uio_hv_generic driver fix
   - ntsync selftest fix
   - nsm misc driver fix
   - some MAINTAINER file updates
 
 All of these have been in linux-next for over a week with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 
 iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCamYCHg8cZ3JlZ0Brcm9h
 aC5jb20ACgkQMUfUDdst+ymTpwCgyyS6niRHf2Y0qx/o+i8s87h+ipoAoJeaOzb7
 RWX/ZYiUEoQCtfbxmXZF
 =cRG6
 -----END PGP SIGNATURE-----

Merge tag 'char-misc-7.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are a number of small char/misc/etc driver fixes for 7.2-rc5 that
  resolve a bunch of different reported issues. Included in here are:

   - rust_binder error message reporting fix

   - stratix10-svc firmware driver fixes

   - mei driver fix

   - intel_th hardware tracing driver fix

   - comedi driver fix

   - uio_hv_generic driver fix

   - ntsync selftest fix

   - nsm misc driver fix

   - some MAINTAINER file updates

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

* tag 'char-misc-7.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  MAINTAINERS: Update wine-devel list address
  rust_binder: only print failure if error has source
  intel_th: fix MSC output device reference leak
  misc: nsm: pin the module while the device is open
  mei: bus: access mei_device under device_lock on cleanup
  misc: nsm: only unlock nsm_dev on post-lock error paths
  selftests: ntsync: correct CONFIG_NTSYNC name
  comedi: comedi_parport: deal with premature interrupt
  uio_hv_generic: Bind to FCopy device by default
  MAINTAINERS: Add Greg Kroah-Hartman to GPIB
  firmware: stratix10-svc: fix teardown order in remove to prevent race
  firmware: stratix10-svc: handle NO_RESPONSE in async poll
  firmware: stratix10-svc: fix FCS SMC call kernel-doc
  firmware: stratix10-svc: fix memory leaks and list corruption bugs
2026-07-26 10:47:58 -07:00
Peiyang He
738e6f32e6 iommu/iommufd: Fix IOPF group ownership UAF
iopf_group_alloc() links each last-page IOPF group into the generic IOPF
pending list before invoking the domain fault handler.
iommufd_fault_iopf_handler() also queued an accepted group in the
IOMMUFD deliver list without removing it from the generic pending list.

When detach or HWPT replacement drops the device's IOPF reference count
to zero, an IOMMU driver may call iopf_queue_remove_device(). That
function responds to and frees groups through the generic pending list
without removing the same groups from IOMMUFD's deliver list or response
xarray. A later read, response, or cleanup can then access the freed
group and cause a UAF.

Fix this by dequeuing an accepted group from the generic pending list
before IOMMUFD queues it for userspace response.
Make iopf_group_response() send a response regardless of pending-list
membership, so the dequeued group can still be completed by IOMMUFD.

Link: https://patch.msgid.link/r/3CFD314D0FE4D7EC+20260720085017.3998878-2-peiyang_he@smail.nju.edu.cn
Closes: https://lore.kernel.org/all/B4F28798E2E784CA+d29f723c-b2b5-4b67-8d1c-4f7b9b0b27cb@smail.nju.edu.cn/
Fixes: 34765cbc67 ("iommufd: Associate fault object with iommufd_hw_pgtable")
Cc: stable@vger.kernel.org
Tested-by: Peiyang He <peiyang_he@smail.nju.edu.cn>
Assisted-by: Codex:gpt-5.6-sol
Signed-off-by: Peiyang He <peiyang_he@smail.nju.edu.cn>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2026-07-26 13:16:21 -03:00
Linus Torvalds
73387b89d9 io_uring-7.2-20260724
-----BEGIN PGP SIGNATURE-----
 
 iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAmpkDfYQHGF4Ym9lQGtl
 cm5lbC5kawAKCRD301j7KXHgpgJgEACAoCs3hC/reUovTYQB8+68AyyBmF5xeJMI
 uxYKcVEZGjOo6gTjSm2GYEBa6P85kQtbWEKEfuxXxV2gT1S/3yulV+uy8NfI/lO7
 NsKYRHszaa/AFr2RbeZeYLU9TN/qFbZinfxukpW1zWrfwg83IhGGe6QN53G1XB2v
 +pO0bqSZ/qKkJ4IXGubLxSxUnDWg6bav4XUeEkjSlE6mzp1+BgpesLLOsZNvvLST
 5QTGt5EfWFBgo9LdYHz/ky7MnJjkioFDY+c10sLp2+6ghtyMTZcACB1W4gSSyJG+
 QsLYJ6Z25f7zo7WIci42pCDDDhYWQgDFc7r9+uJ1ISFKXLGnEyONnBaxmk2LTWdX
 g9V03+pI17vTOQNU0XlkpajUykOmMCkhZWA8jwlOAFJXtz+pdV1vSKeSZt9tEB4j
 aEd6IjoBUrPLsv7WIlomf/h9quHfdjMogA6eyaXc4227XzKWo63XlGe4HxBC6yQQ
 4Lq8QH8dta6BOm+5APQXNQ5g/EB0OVLDkgh8EzSTDChgoJd4hVwoHnGbGidZSAcR
 mgSl4SG/XdXMIwhqAH5iiI+7YZ71ALnoRkLujED90c+lGHrrY0T7H99XaHprp6xa
 NOUbz5CAZf+bWPfXbLpJG+QTh/evh9zxfJ30VprHByl99EJFxjK7rW3BJvOAokjs
 1O635JJo7A==
 =pQDU
 -----END PGP SIGNATURE-----

Merge tag 'io_uring-7.2-20260724' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

Pull io_uring fixes from Jens Axboe:

 - Fix a missing ERESTARTSYS conversion in the read paths, which got
   messed up back when some code consolidation was done for read
   multishot support

 - zcrx UAPI rename, dropping the abbreviated "notif" naming in favor of
   "event" for consistency and to be less ambiguous for users. This was
   added for 7.2, so let's rename it while we still can. No functional
   or code changes, just a strict rename

* tag 'io_uring-7.2-20260724' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  io_uring/zcrx: rename notif to event
  io_uring/zcrx: rename ZCRX_NOTIF_NO_BUFFERS
  io_uring/zcrx: drop "notif" from stats struct names
  io_uring/rw: fix missing ERESTARTSYS conversion in read paths
2026-07-24 19:58:03 -07:00
Jakub Kicinski
53658c6f36 netfilter pull request 26-07-23
-----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEjF9xRqF1emXiQiqU1w0aZmrPKyEFAmpiQwsACgkQ1w0aZmrP
 KyEYhhAAqWpGxZnyCNSRSb1HudQOUIIud4yyPdCtTuSMqSol8WW0lPGxs9woJs01
 vT2pbcDg0gnMMPzTCpIY/cj38aFQ5kB1wLn1/rj1XiPxUA2sqpT7vU+6kceGYj7m
 HR0jpvw40b6CgMfQjVjLl1Qdv98LixAgGIskERMuBL64BCt9ZZwpNfbafCRoFYBg
 /R3ehDJivpVbgWifgq2cIsEurEX2q/apEDtn+nO/e9Uv4RcLLOqsEprcR8NaZNns
 Mbv8ZkxeqJ0m2yccz3NcESydLBrapZ0DQjAadxx9i6ApbdbxYo1ApajSl/7HbW7y
 WgW1lO40T+Ngp6GtW7bgJnTkedcNb26RApdhXgH+IwNUqQiKq4Lv8LE+U3FyJFed
 wf442yo6k7jPz0orc9RLsTOJkayR1IwOSV5n05sk7/NMWS3WL8ToCf3L6rk/FonW
 7doZtEj8i8womCgovep5Ct+3q9Mpud2/vzQAquaHT2mPWraKM/ywlClH4N7XO1fx
 jNWohXqsuB/BgkV78yOy4GRqEqQHDIl0B850MoKDiPhH2YgMyuR5lbR97fHsFFp8
 VzEbTa/6AAs8WIFk79DNNnWNgX4z1YuVBXsqQmHD7T/wxOc1CT8xEm1zKJu4lhJf
 DXxz8jOa4gH5SKchXGRhPrKYE0Am+2eX5KjASI+lSrxJsN+dzWM=
 =5ouZ
 -----END PGP SIGNATURE-----

Merge tag 'nf-26-07-23' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf

Pablo Neira Ayuso says:

====================
Netfilter/IPVS fixes for net

The following batch contains Netfilter/IPVS fixes for net. This batch
includes a mix of IPVS follow ups related to Sashiko reports, as well as
crash fixes for connection tracking expectation, helpers, ipset and
nf_tables mostly for old bugs. This also includes a fix for the
flowtable tunnel selftest.

1) Use s32 instead of s16 to calculate the remaining payload containing
   SIP messages, otherwise underflow is possible allowing out-of-bound
   memory access beyond the skb->data area. From Xiang Mei.

2) Fix the counter check in the flowtable selftest for tunnels, from
   Lorenzo Bianconi.

3) Add and use nf_ct_expect_related_pair() to add the RTP and RTCP
   expectations under the expectation lock, this is required by the SIP
   and H.323 NAT helpers. This fixes a possible reinsertion of an
   expectation with the DEAD flag set on while looping to find
   consecutive ports.

4) Fix ipset UaF during table resize by blocking comment updates on
   kernel-side adds. From David Lee.

5) Do not propagate the IP_VS_CONN_F_ONE_PACKET flag when using IPVS
   state synchronization, otherwise reaching stale freed from
   ip_vs_conn struct is possible, Zhiling Zou.

6) Adjust the hn1 hash node when the forwarding method changes between
   MASQ and non-MASQ for an already hashed connection.  This can leave
   stale hash nodes pointing to a freed struct ip_vs_conn and trigger
   UaF while reading /proc/net/ip_vs_conn. From Julian Anastasov.

7) nft_object rhltable needs to be per table, just like chain rhltable,
   otherwise UaF from object lookup path while netns is being released.
   There is also the nlevent path that can reach stale objects. Placing
   this rhltable under the table hierarchy fixes this issue.

8) Reject invalid combined usage of hashlimit tables with and without
   XT_HASHLIMIT_RATE_MATCH flag mode, otherwise access to uninitialized
   .burst field of dsthash_ent is possible.

9) Fix checksum validations in IPVS performed from LOCAL_IN,
   from Julian Anastasov.

10) Fix incorrect packet offset to layer 4 protocol in IPVS, uncovered
    by Sashiko, from Julian Anastasov.

11) Skip the mangling of ICMP replies for non-first fragments, also
    reported by Sashiko. Also from Julian.

12) Clear ip_vs_conn flags under the spinlock to fix a possible data
    race. From Julian Anastasov.

13) Fix incorrect calculation of the payload bitmask in the nf_tables
    hardware offload support, leading to UBSAN splat. From Xiang Mei.

* tag 'nf-26-07-23' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
  netfilter: nft_payload: fix mask build for partial field offload
  ipvs: clear the nfct flag under lock
  ipvs: do not mangle ICMP replies for non-first fragments
  ipvs: fix places with wrong packet offsets
  ipvs: fix the checksum validations
  netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH
  netfilter: nf_tables: make nft_object rhltable per table
  ipvs: adjust double hashing when fwd method changes
  ipvs: do not propagate one-packet flag to synced conns
  netfilter: ipset: do not update comments from kernel-side hash adds
  netfilter: nf_conntrack_expect: add and use nf_ct_expect_related_pair()
  selftests: netfilter: nft_flowtable.sh: fix offload counter verification for tunnel tests
  netfilter: nf_conntrack_sip: widen NAT rewrite delta to s32 in sip_help_tcp()
====================

Link: https://patch.msgid.link/20260723163910.274695-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-07-24 17:10:54 -07:00
Maciej Fijalkowski
72f2b4516f xsk: reclaim invalid Tx descriptors in ZC batch path
The zero-copy Tx batch parser stops when it encounters an invalid
descriptor. If this happens after one or more continuation descriptors,
the Tx consumer can be advanced past fragments that are neither submitted
to the driver nor returned to userspace through the completion ring.

A similar problem occurs when a packet exceeds xdp_zc_max_segs. The
descriptors consumed up to the limit are released without completion, and
the remaining continuation descriptors can subsequently be interpreted
as the beginning of another packet.

Parse Tx batches in packet units and distinguish descriptors belonging to
complete valid packets from descriptors consumed while draining an
invalid or oversized packet. Return the former to the driver and append
the latter to the CQ address area so userspace can reclaim their UMEM
frames.

Treat a standalone invalid descriptor as a one-descriptor reclaim-only
packet. Advancing the Tx-ring consumer releases the ring slot, but does
not by itself return ownership of the referenced UMEM frame to userspace.

Once draining starts, continue until the packet's end-of-packet
descriptor is consumed. Preserve the drain state on the socket when EOP
has not yet been supplied, so draining can continue during a later call.
Leave incomplete but otherwise valid packets on the Tx ring.

Shared-UMEM pools using multi-buffer Tx also need packet-framed parsing.
Walk their Tx sockets one packet at a time, preserving the existing
per-socket fairness scheme, instead of using the legacy one-descriptor
fallback. Keep that fallback for shared pools that do not use
multi-buffer Tx. Since the drain state is maintained per socket and both
the singular and shared paths can resume an interrupted drain, changing
the socket list from singular to shared requires no special bind-time
transition.

CQ entries are positional, and drivers may complete only part of the Tx
work returned by xsk_tx_peek_release_desc_batch(). Therefore, reclaim-only
entries cannot be published immediately when earlier driver-visible
descriptors are still outstanding.

Track the number of driver-visible CQ entries preceding the reclaim
entries. Let xsk_tx_completed() publish partial hardware Tx completions,
and publish the reclaim entries only after every earlier Tx descriptor
has completed. Complete a reclaim-only batch immediately when there is no
driver-visible work in front of it, and prevent another Tx batch from
being appended while reclaim entries remain pending.

Also cap batch processing by the size of the pool's temporary descriptor
array, as Tx rings belonging to sockets sharing a UMEM may have different
sizes.

This ensures that every invalid Tx descriptor consumed by the ZC batch
path is either submitted to the driver as part of a valid packet or
returned to userspace without violating CQ completion ordering.

Reviewed-by: Jason Xing <kernelxing@tencent.com>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Fixes: cf24f5a5fe ("xsk: add support for AF_XDP multi-buffer on Tx path")
Link: https://patch.msgid.link/20260719135609.147823-5-maciej.fijalkowski@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-07-24 15:12:14 -07:00
Maciej Fijalkowski
08c9a8e794 xsk: provide sufficient space in pool->tx_descs
The temporary Tx descriptor array in an XSK buffer pool is currently
sized from the Tx ring of the socket that creates the pool.

This is insufficient for shared-UMEM Tx. A later socket may have a
larger Tx ring and submit a valid multi-buffer packet containing more
descriptors than the first socket's ring, while still remaining within
the device's xdp_zc_max_segs limit.

A packet-framed batch parser bounded by the temporary array cannot reach
the end-of-packet descriptor in that case. It leaves the packet on the
Tx ring and encounters the same packet on every subsequent attempt,
stalling Tx processing for that socket.

Size the temporary descriptor array to the larger of the first Tx ring
and the device's xdp_zc_max_segs capability. This keeps the array large
enough to inspect one maximum-sized valid packet. Larger shared Tx rings
do not require further resizing, as they can be processed over multiple
batches.

Following commit will actually address the data path side.

Fixes: d558196604 ("xsk: support ZC Tx multi-buffer in batch API")
Reviewed-by: Jason Xing <kernelxing@tencent.com>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20260719135609.147823-4-maciej.fijalkowski@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-07-24 15:12:14 -07:00
Jason Xing
bd44a6dcd4 xsk: drain continuation descs after overflow in xsk_build_skb()
Fix generic xmit path multi-buffer logic when packets are either too big
(count of descriptors exceed MAX_SKB_FRAGS) or an invalid descriptor is
included in fragmented packet. Introduce xdp_sock::drain_cont and act
upon this flag - when it is set, keep on consuming descriptors from
AF_XDP Tx ring and put them directly onto Cq. Previously these
descriptors were silently lost and could never be reached again.

Fixes: cf24f5a5fe ("xsk: add support for AF_XDP multi-buffer on Tx path")
Closes: https://lore.kernel.org/all/20260425041726.85FB3C2BCB2@smtp.kernel.org/
Reviewed-by: Jason Xing <kernelxing@tencent.com>
Co-developed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> # wrapped cq addr submission onto routine
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Jason Xing <kernelxing@tencent.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20260719135609.147823-3-maciej.fijalkowski@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-07-24 15:12:14 -07:00
Linus Torvalds
e2a936998a drm fixes for 7.2-rc5
MAINTAINERS:
 - update address
 
 ttm:
 - backup pages using correct order
 
 gpusvm:
 - fix mm leak on eviction
 - properly zero page array in mm scanning
 
 tests:
 - fix dma mask errors in tests
 
 panel:
 - fix dependency issues
 - ilitek-ili9881c - fix probing
 
 i915:
 - Remove DP_EDP_BACKLIGHT_AUX_ENABLE_CAP check for DPCD backlight
 
 xe:
 - Skip invalidation for purgeable state updates
 - Add drm_dev guards when detaching CCS read / write buffers
 - Alloc per domain unique i2c id
 - Fix SVM leak on resv obj alloc failure in xe_vm_create
 
 amdgpu:
 - Fix a backport mistake for dm_gpureset_toggle_interrupts()
 - Fix a failure on flip-done timeouts for mode1 reset
 
 appletbdrm:
 - fix issue in damage handling
 
 amdxdna:
 - fix command timeout race
 
 imagination:
 - fix gpu vm locking
 
 vc4:
 - prevent trusted bo from being mapped again
 - prevent timer rearm on shutdown
 
 v3d:
 - fix NULL deref in unbind
 - idle AXI before clock disable on suspend
 - use proper GMP access for newer hw
 
 vmwgfx:
 - validate shader array size
 
 ethosu:
 - fix length calculations
 - handle internal chaining buffers
 
 gma500:
 - return errors from HDMI i2c reads
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEEKbZHaGwW9KfbeusDHTzWXnEhr4FAmpj0ckACgkQDHTzWXnE
 hr7ExBAAo7QeJH9InKxqEv4Yt+JDcmGM4HhGhMoBkRp3YwgS0JDnUsTZeb2jGSbb
 XgbgfrYa1E8tUYSUUoMRQoHBQffuAXCovsaKxL0WOBaT5S/pIfKYsHyQLEMIFaLs
 /cTH0VZ49VVOrlNyiQp4tUwJTAalRhB4RS+hfDLQMsG2wHdK4jObmamdpNh71vsZ
 K7vPUvhRqyim2r9nVa6pv/LXpjRbtf+tq8cQF0ywW4eybB1zfdk+t8QQlAqkhoph
 FW6Wz8o6d/wFezOyFaItOfJyJS+RPeUIEwWnmqtUM1Qp26DpLmPlH9HPJMl7yjZm
 vrxuCH9B5RBE75PvJX3p9lVgh7ZENtVYboh+YhMSFjqKtirJf4Nm+XoUHwq2bycp
 q5Re9IRlfPacrKe33eetOREmw7nnAtg8mw4VTuZLuYM1MlwZqSRfxVvcBCy1QMOP
 FNcHg63uGogrRj4vdbmDyqmf0hsK1ZeBMH6OKdCe3ABjytFIZ0TxTseytvx7tug1
 ymt0t8W/lFrdZipN8oF36k2VQGLs5k3qAvV90b7RaEL7zpbZHu3H7FNsACk2vOcv
 E5XpvsnVxlgbFUQMDrtV7YxyCrn4+ln9CrAI7St9fIAHNNS7BsmQWe06Co9Kjy+c
 9/aOw4tsZ0GUaPodKQxvvQrTmExzqXMu5iYnm4JTXO2zuSAjFpk=
 =iIeO
 -----END PGP SIGNATURE-----

Merge tag 'drm-fixes-2026-07-25' of https://gitlab.freedesktop.org/drm/kernel

Pull drm fixes from Dave Airlie:
 "Weekly drm pull request, small and scattered seems to be the new
  normal, the ttm change is probably the largest, with xe being the
  most. Alex was out this week so amdgpu is smaller and only has some
  urgent fixes.

  MAINTAINERS:
   - update mailmap address

  ttm:
   - backup pages using correct order

  gpusvm:
   - fix mm leak on eviction
   - properly zero page array in mm scanning

  tests:
   - fix dma mask errors in tests

  panel:
   - fix dependency issues
   - ilitek-ili9881c - fix probing

  i915:
   - Remove DP_EDP_BACKLIGHT_AUX_ENABLE_CAP check for DPCD backlight

  xe:
   - Skip invalidation for purgeable state updates
   - Add drm_dev guards when detaching CCS read / write buffers
   - Alloc per domain unique i2c id
   - Fix SVM leak on resv obj alloc failure in xe_vm_create

  amdgpu:
   - Fix a backport mistake for dm_gpureset_toggle_interrupts()
   - Fix a failure on flip-done timeouts for mode1 reset

  appletbdrm:
   - fix issue in damage handling

  amdxdna:
   - fix command timeout race

  imagination:
   - fix gpu vm locking

  vc4:
   - prevent trusted bo from being mapped again
   - prevent timer rearm on shutdown

  v3d:
   - fix NULL deref in unbind
   - idle AXI before clock disable on suspend
   - use proper GMP access for newer hw

  vmwgfx:
   - validate shader array size

  ethosu:
   - fix length calculations
   - handle internal chaining buffers

  gma500:
   - return errors from HDMI i2c reads"

* tag 'drm-fixes-2026-07-25' of https://gitlab.freedesktop.org/drm/kernel: (31 commits)
  drm/amd/display: Fix missing DCE check in dm_gpureset_toggle_interrupts()
  drm/amd/display: Fix flip-done timeouts on mode1 reset
  Revert "drm/pagemap: Guard HPAGE_PMD_ORDER use with CONFIG_ARCH_ENABLE_THP_MIGRATION"
  drm/vc4: Shut down BO cache timer before teardown
  drm/tests: shmem: Set DMA mask to 64-bit in drm_gem_shmem
  drm/xe/vm: Fix SVM leak on resv obj alloc failure in xe_vm_create()
  drm/xe/i2c: Allow per domain unique id
  drm/gma500: return errors from Oaktrail HDMI I2C reads
  drm/vc4: hvs/v3d: Fix null dereference in unbind
  drm/panel: fix unmet dependency bug for DRM_PANEL_HIMAX_HX83121A
  drm/panel: s6e3ha8: fix unmet dependency on DRM_DISPLAY_HELPER
  drm/panel: ilitek-ili9882t: fix unmet dependency for DRM_PANEL_ILITEK_ILI9882T
  drm/panel: ilitek-ili9881c: do not fail probe if iovcc is absent
  drm/v3d: Idle AXI transactions before disabling the clock on suspend
  drm/v3d: Reach the GMP through the hub registers on V3D 7.x
  mailmap: Update Maíra Canal's email address
  drm/pagemap: Guard HPAGE_PMD_ORDER use with CONFIG_ARCH_ENABLE_THP_MIGRATION
  drm/pagemap: Clear driver-provided PFNs from migration PFN array
  drm/xe/vf: Add drm_dev guards when detaching CCS read/write buffers
  accel: ethosu: Handle U85 internal chaining buffer
  ...
2026-07-24 14:11:53 -07:00
Linus Torvalds
981f4a2baa fscrypt fixes for v7.2-rc5
A couple fixes for AI-detected bugs.
 -----BEGIN PGP SIGNATURE-----
 
 iIkEABYIADIWIQSacvsUNc7UX4ntmEPzXCl4vpKOKwUCamPDWBQcZWJpZ2dlcnNA
 a2VybmVsLm9yZwAKCRDzXCl4vpKOK4C8APjY2sD4jMa1oX05SiLL7iUulkTXivOb
 n14nFabjqF25AP9MZImv0oS5eQWt/QPLHfNlB6olRd9Q0GqVOYYdKQ/6DA==
 =pStx
 -----END PGP SIGNATURE-----

Merge tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/linux

Pull fscrypt fixes from Eric Biggers:
 "A couple fixes for AI-detected bugs"

* tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/linux:
  fscrypt: Avoid dynamic allocation in fscrypt_get_devices()
  fscrypt: Add missing superblock check in find_or_insert_direct_key()
2026-07-24 13:12:43 -07:00
Linus Torvalds
86ba24c41a slab fixes for 7.2-rc4
-----BEGIN PGP SIGNATURE-----
 
 iQFPBAABCAA5FiEEe7vIQRWZI0iWSE3xu+CwddJFiJoFAmpjWAEbFIAAAAAABAAO
 bWFudTIsMi41KzEuMTIsMiwyAAoJELvgsHXSRYia05cH/RmNDT1xgDYobPcl1fDI
 3FkFG4n/cARfh1wWFbV/niNi6q63fq9KyHjNPzkANzDM3CpvdIHzUvF9EzTnj+bW
 6tsdO2qlNMzdB2xAKpGtRqKIuGb1JeG5OtWc/+sHrt8ASdMdQCuufxVe6cKtNCMl
 Xa3JfqNldG4ZSaT+I4OJBkbOVuHtSO/VCX6RTItqXc3NH5CjyMZR+V+3FK/TwvNn
 TAo+MFhTI9tDSge4rDrJSD9Pxddi3UIhvlPxEqlOT0tPUp2PJYCeoOMtPVR/c2LW
 Cz03EwLZWbDg9qTC6cy/ZZu8/7+84VgrQwkNlLkpnPTPaTJ2s04Lg+FIjDCv/LcG
 +Cc=
 =MKn/
 -----END PGP SIGNATURE-----

Merge tag 'slab-for-7.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab

Pull slab fixes from Vlastimil Babka:

 - Prevent unbounded recursion in free path with memory allocation
   profiling, which has caused a stack overflow on a Meta production
   host due to a 125-deep __free_slab<->kfree recursion (Harry Yoo)

 - Fix type-based partitioning confusing sparse which does not know
   __builtin_infer_alloc_token() (Marco Elver)

 - Fix a potential memory leak in bulk freeing path on NUMA machines
   (Shengming Hu)

* tag 'slab-for-7.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
  slab: silence sparse warning with type-based partitioning
  mm/slab: prevent unbounded recursion in free path with new kmalloc type
  lib/alloc_tag: introduce mem_alloc_profiling_permanently_disabled()
  mm/slab: decouple SLAB_NO_SHEAVES from SLAB_NO_OBJ_EXT
  mm/slab: fix a memory leak due to bootstrapping sheaves twice
  mm/slub: fix lost local objects when bulk remote free batch fills
2026-07-24 07:28:35 -07:00
Dave Airlie
e24b02df4e drm-misc-fixes for v7.2-rc5:
- Improve damage handling in appletbdrm.
 - Fix harmful fragmenting of MM by backing up TTM pages at native
   page order.
 - Fix timeout handling in amdxdna.
 - Fix imagination locking for map/unmap operations.
 - Fix mm leak in gpusvm eviction.
 - Properly zero page array in gpusvm mm scanning.
 - Prevent trusted shader bo's from being mapped again in vc4.
 - Validate shader array size in vmwgfx.
 - Fix length calculation bugs in ethosu.
 - Better error handling during pagemap migration.
 - Improve v3d suspend.
 - Kconfig updates for some panels.
 - Handle missing iovcc in ili9881c panel.
 - Fix vc4 unbind.
 - Add i2c error handling in gma500.
 - Fix kunit tests on pp64le and s390x.
 - Prevent rearming vc4 timer on shutdown.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEuXvWqAysSYEJGuVH/lWMcqZwE8MFAmpjDjgACgkQ/lWMcqZw
 E8NoIQ/+PaoFa25I+9e+RgtgjYWLKpYoRdDHi7u7zUPzr5Z7XzAGPUYG0lYc6Gxw
 zQicvLcMCiBW8+mwTBytLESIXn5SfjFP0KPYhCnyXSnDRdHiWj+nlXD1A0mG5YQ+
 cFDYyyXS2Ka1TsdPbXr6f3zyNDSuhmRJbo6qGvEYR+KimyHMU8zqXPD6F4GazHd2
 ocQrGzOP3608oJHRiGA5zs5IfupbO5uvQE9oJJ/mpdYxhd4B5hIK7t+8BfkqGJ16
 4v1A5Bb6Gjw9tWZvzEcyIZ/wECrJ7Wgj5Jf87aTWh23Ufdmno3k884ezkYYyTAof
 CJEQ6Rr1kuhbDDGfekzW+5/Z55OJfWDhwhBh9I1897Y9JWPGAArB6zJj1iRaGRJ2
 ictGAWqpQXq8rXqnYsKPmI610Ck1f1aQrC8KEEPHLqW/EfwzLz68YsS9qAnll1Z8
 1rgstWDAFouBeBoW1YNVrM5CtlKzLTrCUa2PVeqaFbxtPEoMzXPZfuP9bUr0AJG7
 uXbPpxoWtzL4BnsDoi1lpZbr02APcuwXC2n76JDj0wRZj+l6RWWWhDlEDHXMwb5s
 OTdtxSgYjiHCargTaL7i0gOFcHScZ901OcSdeLcUnwNDG6T4yLK1EhnX2SKE2lak
 xi0U5oDsnYdJ+WnHmlb1CIbUKRQWZjNENdRSKd48/OhLDaT4YQU=
 =cog2
 -----END PGP SIGNATURE-----

Merge tag 'drm-misc-fixes-2026-07-24' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes

drm-misc-fixes for v7.2-rc5:
- Improve damage handling in appletbdrm.
- Fix harmful fragmenting of MM by backing up TTM pages at native
  page order.
- Fix timeout handling in amdxdna.
- Fix imagination locking for map/unmap operations.
- Fix mm leak in gpusvm eviction.
- Properly zero page array in gpusvm mm scanning.
- Prevent trusted shader bo's from being mapped again in vc4.
- Validate shader array size in vmwgfx.
- Fix length calculation bugs in ethosu.
- Better error handling during pagemap migration.
- Improve v3d suspend.
- Kconfig updates for some panels.
- Handle missing iovcc in ili9881c panel.
- Fix vc4 unbind.
- Add i2c error handling in gma500.
- Fix kunit tests on pp64le and s390x.
- Prevent rearming vc4 timer on shutdown.

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patch.msgid.link/07284633-6b9b-40f9-8949-b1516a42a34c@linux.intel.com
2026-07-24 18:30:29 +10:00
Linus Torvalds
d326f83e81 Lots of fixes, double the count even for the "new normal".
Largely due to my time off followed by a networking conference
 which distracted most maintainers (less so the AI generators).
 
 Including fixes from Bluetooth and WiFi.
 
 Current release - regressions:
 
  - wifi: mt76: fix MAC address for non OF pcie cards
 
 Current release - new code bugs:
 
  - mptcp: fix BUILD_BUG_ON on legacy ARM config
 
  - wifi: cfg80211: guard optional PMSR nominal time
 
 Previous releases - regressions:
 
  - qrtr: ns: raise node count limit to 512, we arbitrarily picked
    256 as a limit, turns out it was too low for real world deployments
 
  - vhost-net: fix TX stall when vhost owns virtio-net header
 
  - eth: amd-xgbe: fix MAC_AUTO_SW handling in CL37 AN
 
  - wifi: ath12k: fix low MLO RX throughput on WCN7850
 
 Previous releases - always broken:
 
  - number of random AI fixes for SCTP, RDS and TIPC protocols
 
  - more AI-looking fixes for WiFi drivers
 
  - number of fixes for missing pointer reloading after skb pull
 
  - reject BPF redirect use from qdisc qevent block
 
  - tcp: initialize standalone TCP-AO response padding
 
  - vsock/virtio: collapse receive queue under memory pressure to avoid
    client OOMing the host with tiny messages
 
  - ipv4: icmp: fill flow parameters in icmp_route_lookup decoy lookup,
    make sure the ICMP response routing follows the routing policy
 
  - gro: fix double aggregation of flush-marked skbs
 
  - ovpn: fix various refcount bugs
 
  - tls: device: push pending open record on splice EOF
 
  - eth: mlx5:
   - use sender devcom for MPV master-up
   - fix MCIA register buffer overflow on 32 dword reads
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEE6jPA+I1ugmIBA4hXMUZtbf5SIrsFAmpiX68ACgkQMUZtbf5S
 IrvYsRAAkuMhUpz0Ss9aF7rBY8iTp4SofSvFeVe06ywraUfqPuflGlak07t1Lz/i
 G4MuKXN0q8m+B0EZddfMeYw6rCGd0SCtFAkxUI3dd+pu4hssgioaCPL193drSsfC
 /lYeacjVL45jNrQvAWwKsRaAs3xdwzxWf0ddIXWvVWbdDsVfIf/mYahSS3TvniWw
 MQtEbWPnFwPvOrHzb+1ChLELCtig/yvK+3xS9JrwOkjUF4BczOUgqrYlG5MWerXP
 f/JDLsegPcoZaTycW5F5fshY05umeRQza/zCFqMKQNcQux49fjREnYxBuyTacVCo
 0cxhsNbKOhvBpBFNsHA6TjUbDxuiyL8L/g3e7VOlQFxI4hX3IMsnsP+UrSdE2zyG
 lgFAQ6HIcelgFnzFcwp9YEGsiZ5nDoJKe5aBcgftzTFPx3Plh1UeCrNjYtJawcjk
 1POovopI+G6eszwluVOoucUdDD3wf0jPgDqvdOcI9P9FVTsFmvRESsfen7NbdjG0
 v5mk9+sasWL1dns6mre6nt5is4QWSg7PDjufQUhuPKSSEnld+csEgmyxmUm0/FgL
 krUZLHdx0Yj9yIOAIYAvz8QoW9jHIyK05Mr7CoL4a/9RJ4rtxjb+3CT9qebeyd49
 jK5uzYX6tPHvILFK4CgZwcE/z9S+DoxCAuDEp6LhfstKsJW4KIM=
 =DIF8
 -----END PGP SIGNATURE-----

Merge tag 'net-7.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Lots of fixes, double the count even for the 'new normal'. Largely due
  to my time off followed by a networking conference which distracted
  most maintainers (less so the AI generators).

  Including fixes from Bluetooth and WiFi.

  Current release - regressions:

   - wifi: mt76: fix MAC address for non OF pcie cards

  Current release - new code bugs:

   - mptcp: fix BUILD_BUG_ON on legacy ARM config

   - wifi: cfg80211: guard optional PMSR nominal time

  Previous releases - regressions:

   - qrtr: ns: raise node count limit to 512, we arbitrarily picked
     256 as a limit, turns out it was too low for real world deployments

   - vhost-net: fix TX stall when vhost owns virtio-net header

   - eth: amd-xgbe: fix MAC_AUTO_SW handling in CL37 AN

   - wifi: ath12k: fix low MLO RX throughput on WCN7850

  Previous releases - always broken:

   - number of random AI fixes for SCTP, RDS and TIPC protocols

   - more AI-looking fixes for WiFi drivers

   - number of fixes for missing pointer reloading after skb pull

   - reject BPF redirect use from qdisc qevent block

   - tcp: initialize standalone TCP-AO response padding

   - vsock/virtio: collapse receive queue under memory pressure to avoid
     client OOMing the host with tiny messages

   - ipv4: icmp: fill flow parameters in icmp_route_lookup decoy lookup,
     make sure the ICMP response routing follows the routing policy

   - gro: fix double aggregation of flush-marked skbs

   - ovpn: fix various refcount bugs

   - tls: device: push pending open record on splice EOF

   - eth: mlx5:
      - use sender devcom for MPV master-up
      - fix MCIA register buffer overflow on 32 dword reads"

* tag 'net-7.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (234 commits)
  drop_monitor: perform u64_stats updates under IRQ-disabled section
  drop_monitor: fix size calculations for 64-bit attributes
  net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD
  mptcp: fix BUILD_BUG_ON on legacy ARM config
  selftests: mptcp: userspace_pm: fix undefined variable port
  mptcp: fix stale skb->sk reference on subflow close
  mptcp: pm: userspace: fix use-after-free in get_local_id
  mptcp: decrement subflows counter on failed passive join
  mac802154: hold an interface reference across the scan worker
  sctp: don't free the ASCONF's own transport in DEL-IP processing
  phonet: check register_netdevice_notifier() error in phonet_device_init()
  phonet: pep: fix use-after-free in pep_get_sb()
  bnge/bng_re: fix ring ID widths
  tipc: fix integer overflow in tipc_recvmsg() and tipc_recvstream()
  net: airoha: fix ETS channel derivation in airoha_tc_setup_qdisc_ets()
  mctp: check register_netdevice_notifier() error in mctp_device_init()
  ptp: netc: explicitly clear TMR_OFF during initialization
  rds: tcp: unregister sysctl before tearing down listen socket
  ipv6: Change allocation flags to match rcu_read_lock section requirements
  net: slip: serialize receive against buffer reallocation
  ...
2026-07-23 12:58:08 -07:00
Vikas Gupta
b9e558976b bnge/bng_re: fix ring ID widths
Firmware requires more than 16 bits to address TX ring IDs for its
internal QP management. Widen the associated HSI ring ID fields to
32 bits. The values firmware assigns remain within 24 bits, bounded
by the hardware doorbell XID field.

The fw_ring_id field belongs to bnge_ring_struct, a common struct
shared by all ring types, so widening it to u32 applies uniformly
across TX, RX, CP, and NQ rings but firmware assigns values within
16-bit range for all ring types except TX, which requires the wider
field.

Note that, Thor Ultra hardware has not yet been deployed and no
firmware has been released to field, so backward compatibility
is not a concern.

Fixes: 42d1c54d62 ("bnge/bng_re: Add a new HSI")
Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com>
Reviewed-by: Siva Reddy Kallam <siva.kallam@broadcom.com>
Reviewed-by: Dharmender Garg <dharmender.garg@broadcom.com>
Reviewed-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>
Link: https://patch.msgid.link/20260721063731.2622500-1-vikas.gupta@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-07-23 10:24:12 -07:00
Julian Anastasov
342e24a339 ipvs: do not mangle ICMP replies for non-first fragments
Sashiko warns that ip_vs_nat_icmp() unconditionally mangles the
payload for embedded non-first IPv4 fragments. The problem is
in the very old inverted pp->dont_defrag check which should not
continue when embedded is a non-first TCP/UDP/SCTP fragment.

Check for embedded non-first fragment is also missing from
ip_vs_out_icmp_v6(), it is needed before any connection
lookups that expect ports after the network headers.

Drop the blocking code from ip_vs_in_icmp_v6() which prevents
ICMPv6 from local clients to use non-MASQ forwarding.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Link: https://sashiko.dev/#/patchset/20260720201122.79882-1-ja%40ssi.bg
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2026-07-23 18:08:22 +02:00
Julian Anastasov
15cab31a37 ipvs: fix places with wrong packet offsets
The offsets we use to packet headers and payloads should be
based on skb->data. We even already respect non-zero
network offset in ip_vs_fill_iph_skb() but some places
do it wrongly and support only zero offset which is expected
for the IP layer where IPVS has hooks.

Change all places that instead of skb->data use offsets based
on the network header (skb_network_header, ip_hdr, etc) because
this doubles the network offset as noted by Sashiko.

For ip_vs_nat_icmp_v6() we can even rely on the IPv6 header
parsing done by the caller.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Link: https://sashiko.dev/#/patchset/20260710143733.29741-2-fw%40strlen.de
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2026-07-23 18:05:08 +02:00
Julian Anastasov
e876b75b90 ipvs: fix the checksum validations
ip_vs_in_icmp_v6() is missing checksum validation for ICMPv6
packets from clients. In fact, as for TCP/UDP we should
validate the checksum for ICMP packets only when we
mangle the packets on MASQ or on reply for tunnel.

Also, Sashiko points out that handle_response_icmp() being
common for IPv4 and IPv6 is missing the pseudo-header
calculation while validating ICMPv6 messages from real
servers which is a problem if checksum is not validated
by the hardware.

Fix the problems by creating ip_vs_checksum_common_check()
helper and use it for TCP/UDP/ICMP both for IPv4 and IPv6.
Rely on the nf_checksum() for validating the ICMP messages
but use it also for TCP and UDP.

Use correct IP offset for IP_VS_DBG_RL_PKT for TCP/UDP/SCTP.

IPVS packets (TCP/UDP/SCTP/ICMP) do not need checksum
validation on LOCAL_OUT (local clients or local real
servers) and on FORWARD (traffic from servers on LAN).
Do it only on LOCAL_IN, in case nf_checksum() is not
called on PRE_ROUTING.

Also, ip_vs_checksum_complete() can be marked static.

Fixes: 2a3b791e6e ("IPVS: Add/adjust Netfilter hook functions and helpers for v6")
Link: https://sashiko.dev/#/patchset/20260708180315.77413-1-ja%40ssi.bg
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2026-07-23 18:04:40 +02:00
Pablo Neira Ayuso
f4f6997905 netfilter: nf_tables: make nft_object rhltable per table
The nft_object rhltable is global, this allows for accessing objects
that are being dismangled from lookup path by other existing netns.
Given the nft_obj_destroy() releases the object inmediately, this might
lead to use-after-free of these objects that are being released.
Make the existing rhltable per table to address this issue to deal with
with the nft_rcv_nl_event() path too.

Update nft_obj_lookup() to take the table as non-const, otherwise,
compiler complains when passing the objname_ht to rhltable_lookup().

Fixes: 4d44175aa5 ("netfilter: nf_tables: handle nft_object lookups via rhltable")
Suggested-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2026-07-23 17:59:30 +02:00
Yuxiang Yang
a28c4fcbf7 tcp: challenge ACK for non-exact RST in SYN-RECEIVED
The SYN-RECEIVED request-socket path in tcp_check_req() accepts an
in-window RST without requiring SEG.SEQ to exactly match RCV.NXT.  A
non-exact RST therefore removes the request instead of eliciting a
challenge ACK.

RFC 9293 section 3.10.7.4 applies the RFC 5961 reset check in
SYN-RECEIVED: an exact RST resets the connection, while a non-exact
in-window RST must trigger a challenge ACK and be dropped.

Apply that check before the ACK-field validation, following the RFC
sequence-number, RST, then ACK processing order.  Factor the per-netns
challenge ACK quota out of tcp_send_challenge_ack() so request sockets
can share it.  Use the request socket's send_ack() callback and its own
out-of-window ACK timestamp to send and rate-limit the response.

Reported-by: Yuxiang Yang <yangyx22@mails.tsinghua.edu.cn>
Reported-by: Yizhou Zhao <zhaoyz24@mails.tsinghua.edu.cn>
Reported-by: Ao Wang <wangao@seu.edu.cn>
Reported-by: Xuewei Feng <fengxw06@126.com>
Reported-by: Qi Li <qli01@tsinghua.edu.cn>
Reported-by: Ke Xu <xuke@tsinghua.edu.cn>
Fixes: 282f23c6ee ("tcp: implement RFC 5961 3.2")
Cc: stable@vger.kernel.org
Signed-off-by: Yuxiang Yang <yangyx22@mails.tsinghua.edu.cn>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260717081443.809393-2-yangyx22@mails.tsinghua.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-07-23 08:27:22 -07:00
Gal Pressman
11c057d234 net/mlx5: Fix MCIA register buffer overflow on 32 dword reads
The MCIA register can return up to 32 dwords (128 bytes) when the device
advertises the mcia_32dwords capability, but struct
mlx5_ifc_mcia_reg_bits only defines dword_0..11, leaving room for just
12 dwords (48 bytes) of data.

mlx5_query_mcia() clamps the read size to mlx5_mcia_max_bytes() and then
memcpy()s that many bytes out of the register, potentially reading past
the end of the 'out' buffer. On kernels built with FORTIFY_SOURCE this
is caught as a buffer overflow while reading the module EEPROM via
ethtool:

  detected buffer overflow in memcpy
  kernel BUG at lib/string_helpers.c:1048!
  RIP: 0010:fortify_panic+0x13/0x20
  Call Trace:
   mlx5_query_mcia.isra.0+0x200/0x210 [mlx5_core]
   mlx5_query_module_eeprom_by_page+0x4a/0xa0 [mlx5_core]
   mlx5e_get_module_eeprom_by_page+0xbb/0x120 [mlx5_core]
   eeprom_prepare_data+0xf3/0x170
   ethnl_default_doit+0xf1/0x3b0

Extend the mcia_reg layout to 32 dwords.

Fixes: 271907ee2f ("net/mlx5: Query the maximum MCIA register read size from firmware")
Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Alex Lazar <alazar@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260717072338.1240582-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-07-23 08:19:29 -07:00
Usama Arif
0ef8faff49 fs: push nr_cached_objects memcg gating into individual filesystems
Commit 0baad6f9b9 ("fs/super: skip non-memcg-aware nr_cached_objects
in memcg slab shrink") added a check in fs/super.c that skipped every
->nr_cached_objects() hook whenever the shrinker was invoked for a
non-root memcg, on the assumption that none of them honour sc->memcg.

That assumption is wrong for XFS, whose inode-reclaim hook is
intentionally driven from per-memcg contexts to free memcg-charged
slab. Encoding a blanket "never memcg-aware" policy in fs/super.c
short-circuits that path.

Push the check down into the callbacks whose counters really are
irrelevant to per-memcg reclaim - btrfs_nr_cached_objects() and
shmem_unused_huge_count() - and drop the fs/super.c gate. Each
filesystem can now lift the restriction independently if its counter
later grows memcg awareness, without touching fs/super.c.

Introduce mem_cgroup_shrink_is_root() in <linux/memcontrol.h> so the
callbacks don't open-code "sc->memcg is NULL or root".

Fixes: 0baad6f9b9 ("fs/super: skip non-memcg-aware nr_cached_objects in memcg slab shrink")
Acked-by: Qi Zheng <qi.zheng@linux.dev>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Shakeel Butt <shakeel.butt@linux.dev>
Signed-off-by: Usama Arif <usama.arif@linux.dev>
Link: https://patch.msgid.link/20260715103516.2410175-1-usama.arif@linux.dev
Acked-by: David Sterba <dsterba@suse.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
2026-07-23 11:35:02 +02:00
Carlos López
cbfe2b24a1 KVM: arm64: vgic: Fix race between LPI release and re-registration
Fix a potential race between decrementing an LPI's reference count and
evicting that structure from the LPI xarray.

LPI structures are maintained in the VGIC LPI xarray (dist->lpi_xa).
When the reference count of an LPI structure drops to zero,
vgic_release_lpi_locked() removes the structure from the xarray and
frees it under the xarray lock.

However, the release of an LPI can race with a concurrent LPI
re-registration with the same INTID via vgic_add_lpi() on another CPU,
since the reference count drop and the xarray eviction are not performed
in a single atomic step. This can happen e.g. if the guest issues a
DISCARD while the LPI is still referenced from a vCPU's active-pending
list (ap_list), and the same INTID is re-mapped via MAPTI.

Particularly, vgic_release_lpi_locked() is called from two distinct
paths: direct release via vgic_put_irq(), and deferred release via
vgic_release_deleted_lpis(). During direct release, the issue can result
in deleting a newly registered LPI from the xarray:

  CPU0 (Releasing LPI)                    CPU1 (Adding new LPI)
  ====================                    =====================
  vgic_put_irq()
      __vgic_put_irq()
          refcount_dec_and_test()
                                          vgic_add_lpi()
                                              xa_lock_irqsave()
                                              old_irq = xa_load(.., intid)
                                              vgic_try_get_irq_ref(old_irq) == false
                        new IRQ inserted -->  __xa_store(.., intid, ..)
                                              xa_unlock_irqrestore()
  xa_lock_irqsave();
  vgic_release_lpi_locked()
      __xa_erase(.., irq->intid)   <-- BUG: new IRQ is erased
      kfree_rcu(old_irq)

During the deferred release path, the old IRQ can be leaked:

  CPU0 (Releasing LPI)                    CPU1 (Adding new LPI)
  ====================                    =====================
  vgic_put_irq_norelease()
      __vgic_put_irq()
          refcount_dec_and_test()
      irq->pending_release = true
                                          vgic_add_lpi()
                                              xa_lock_irqsave()
                                              old_irq = xa_load(.., intid)
                                              vgic_try_get_irq_ref(oldirq) == false
                 BUG: old IRQ overwritten --> __xa_store(.., intid, ..)
                                              xa_unlock_irqrestore()

  vgic_release_deleted_lpis()
      xa_lock_irqsave()
      xa_for_each() { .. } <-- old IRQ with pending_release = true
                               is gone, so it cannot be released

To fix the direct release path, move the reference count drop inside
the xarray lock, making sure that vgic_add_lpi() never encounters the
to-be-released LPI.

In the deferred release path, the refcount drop must happen under a raw
spinlock, so the xarray lock cannot be grabbed, and the same solution
does not work. Instead, update vgic_add_lpi(), so that if it evicts
an LPI from the xarray, it takes on the responsibility of freeing it.
Consequently, an LPI may now be freed concurrently after a deferred
release drops the refcount, so accessing the pending_release field is no
longer safe from use-after-free. Delete all uses of the flag, and update
vgic_release_deleted_lpis() to identify orphaned LPIs purely based on
their refcount.

Reported-by: Claude:claude-opus-4-6
Fixes: 3a08a6ca7c ("KVM: arm64: vgic-v3: Use bare refcount for VGIC LPIs")
Fixes: d54594accf ("KVM: arm64: vgic-v3: Erase LPIs from xarray outside of raw spinlocks")
Signed-off-by: Carlos López <clopez@suse.de>
Link: https://patch.msgid.link/20260715105137.3973823-4-clopez@suse.de
Signed-off-by: Marc Zyngier <maz@kernel.org>
2026-07-23 09:56:57 +01:00