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2026-03-20Merge tag 'drm-fixes-2026-03-21' of https://gitlab.freedesktop.org/drm/kernelmasterLinus Torvalds
Pull drm fixes from Dave Airlie: "Regular weekly pull request, from sunny San Diego. Usual suspects in xe/i915/amdgpu with small fixes all over, then some minor fixes across a few other drivers. It's probably a bit on the heavy side, but most of the fix seem well contained, core: - drm_dev_unplug UAF fix pagemap: - lock handling fix xe: - A number of teardown fixes - Skip over non-leaf PTE for PRL generation - Fix an uninitialized variable - Fix a missing runtime PM reference i915/display: - Fix #15771: Screen corruption and stuttering on P14s w/ 3K display - Fix for PSR entry setup frames count on rejected commit - Fix OOPS if firmware is not loaded and suspend is attempted - Fix unlikely NULL deref due to DC6 on probe amdgpu: - Fix gamma 2.2 colorop TFs - BO list fix - LTO fix - DC FP fix - DisplayID handling fix - DCN 2.01 fix - MMHUB boundary fixes - ISP fix - TLB fence fix - Hainan pm fix radeon: - Hainan pm fix vmwgfx: - memory leak fix - doc warning fix imagination: - deadlock fix - interrupt handling fixes dw-hdmi-qp: - multi channel audio fix" * tag 'drm-fixes-2026-03-21' of https://gitlab.freedesktop.org/drm/kernel: (40 commits) drm/xe: Fix missing runtime PM reference in ccs_mode_store drm/xe: Open-code GGTT MMIO access protection drm/xe/lrc: Fix uninitialized new_ts when capturing context timestamp drm/xe/oa: Allow reading after disabling OA stream drm/xe: Skip over non leaf pte for PRL generation drm/xe/guc: Ensure CT state transitions via STOP before DISABLED drm/xe: Trigger queue cleanup if not in wedged mode 2 drm/xe: Forcefully tear down exec queues in GuC submit fini drm/xe: Always kill exec queues in xe_guc_submit_pause_abort drm/xe/guc: Fail immediately on GuC load error drm/i915/gt: Check set_default_submission() before deferencing drm/radeon: apply state adjust rules to some additional HAINAN vairants drm/amdgpu: apply state adjust rules to some additional HAINAN vairants drm/amdgpu: rework how we handle TLB fences drm/bridge: dw-hdmi-qp: fix multi-channel audio output drm: Fix use-after-free on framebuffers and property blobs when calling drm_dev_unplug drm/amdgpu: Fix ISP segfault issue in kernel v7.0 drm/amdgpu/gmc9.0: add bounds checking for cid drm/amdgpu/mmhub4.2.0: add bounds checking for cid drm/amdgpu/mmhub4.1.0: add bounds checking for cid ...
2026-03-20Merge tag 'execve-v7.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull execve fixes from Kees Cook: - binfmt_elf_fdpic: fix AUXV size calculation (Andrei Vagin) - fs/tests: exec: Remove bad test vector * tag 'execve-v7.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: fs/tests: exec: Remove bad test vector binfmt_elf_fdpic: fix AUXV size calculation for ELF_HWCAP3 and ELF_HWCAP4
2026-03-20Merge tag 'tty-7.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial fixes from Greg KH: "Here are some small tty/vt and serial driver fixes for 7.0-rc5. Included in here are: - 8250 driver fixes for reported problems - serial core lockup fix - uartlite driver bugfix - vt save/restore bugfix All of these have been in linux-next for over a week with no reported problems" * tag 'tty-7.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: vt: save/restore unicode screen buffer for alternate screen serial: 8250_dw: Ensure BUSY is deasserted serial: 8250: Add late synchronize_irq() to shutdown to handle DW UART BUSY serial: 8250_dw: Rework IIR_NO_INT handling to stop interrupt storm serial: 8250_dw: Rework dw8250_handle_irq() locking and IIR handling serial: 8250: Add serial8250_handle_irq_locked() serial: 8250_dw: Avoid unnecessary LCR writes serial: 8250: Protect LCR write in shutdown serial: 8250_pci: add support for the AX99100 serial: core: fix infinite loop in handle_tx() for PORT_UNKNOWN serial: uartlite: fix PM runtime usage count underflow on probe serial: 8250: always disable IRQ during THRE test serial: 8250: Fix TX deadlock when using DMA
2026-03-20Merge tag 'io_uring-7.0-20260320' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux Pull io_uring fixes from Jens Axboe: - A bit of a work-around for AF_UNIX recv multishot, as the in-kernel implementation doesn't properly signal EOF. We'll likely rework this one going forward, but the fix is sufficient for now - Two fixes for incrementally consumed buffers, for non-pollable files and for 0 byte reads * tag 'io_uring-7.0-20260320' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: io_uring/kbuf: propagate BUF_MORE through early buffer commit path io_uring/kbuf: fix missing BUF_MORE for incremental buffers at EOF io_uring/poll: fix multishot recv missing EOF on wakeup race
2026-03-20Merge tag 'spi-fix-v7.0-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi fixes from Mark Brown: "There's a couple of core fixes here from Johan, fixing a race condition and an error handling path, plus a bunch of driver specific fixups. The Qualcomm issues could be nasty if you ran into them, especially the DMA ordering one" * tag 'spi-fix-v7.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: spi: geni-qcom: Check DMA interrupts early in ISR spi: fix statistics allocation spi: fix use-after-free on controller registration failure spi: geni-qcom: Fix CPHA and CPOL mode change detection spi: axiado: Fix double-free in ax_spi_probe() spi: amlogic-spisg: Fix memory leak in aml_spisg_probe() spi: amlogic: spifc-a4: Remove redundant clock cleanup
2026-03-20Merge tag 'regulator-fix-v7.0-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator Pull regulator fix from Mark Brown: "Just one fix here from Hugo Villeneuve, the documentation for some of the regulator DT properties had been cut'n'pasted so that if anyone actually read it they'd be informed that those properties had completely incorrect meanings" * tag 'regulator-fix-v7.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: regulator: dt-bindings: fix typos in regulator-uv-* descriptions
2026-03-20Merge tag 'pmdomain-v7.0-rc1-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm Pull pmdomain fixes from Ulf Hansson: - bcm: increase ASB control timeout for bcm2835 - mediatek: fix power domain count * tag 'pmdomain-v7.0-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm: pmdomain: bcm: bcm2835-power: Increase ASB control timeout pmdomain: mediatek: Fix power domain count
2026-03-20Merge tag 'mmc-v7.0-rc1-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc Pull MMC fixes from Ulf Hansson: - sdhci: Fix timing selection for 1-bit bus width - sdhci-pci-gli: Fix DMA write corruption for GL9750 * tag 'mmc-v7.0-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: mmc: sdhci: fix timing selection for 1-bit bus width mmc: sdhci-pci-gli: fix GL9750 DMA write corruption
2026-03-20Merge tag 'ata-7.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux Pull ata fixes from Niklas Cassel: - ADATA SU680 SSDs are causing command timeouts when LPM is enabled. Enable the ATA_QUIRK_NOLPM quirk to prevent LPM from being enabled on these devices (Damien) - When receiving a REPORT SUPPORTED OPERATION CODES command with an invalid REPORTING OPTIONS format, sense data should have the field pointer set to byte 2 (the location of the REPORTING OPTIONS field) instead of incorrectly pointing to byte 1 (Damien) * tag 'ata-7.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux: ata: libata-scsi: report correct sense field pointer in ata_scsiop_maint_in() ata: libata-core: disable LPM on ADATA SU680 SSD
2026-03-20Merge tag 'mtd/fixes-for-7.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux Pull MTD fixes from Miquel Raynal: - In SPI NOR, there was an issue with the RDCR capability, leading to several platforms no longer capable of using it for wrong reasons (the follow-up commit renames the helper to avoid future confusion) - NAND controller drivers needed to be improved to fix some timings, a locking schenario and avoid certain operations during panic writes - The Spear600 DT binding conversion was done partially, leading to several warnings which have individually been fixed - Tudor gets replaced by Takahiro for the SPI NOR maintainance - Plus two more misc fixes * tag 'mtd/fixes-for-7.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: mtd: rawnand: pl353: make sure optimal timings are applied mtd: spi-nor: Rename spi_nor_spimem_check_op() mtd: spi-nor: Fix RDCR controller capability core check mtd: rawnand: brcmnand: skip DMA during panic write mtd: rawnand: serialize lock/unlock against other NAND operations dt-bindings: mtd: st,spear600-smi: Fix example dt-bindings: mtd: st,spear600-smi: #address/size-cells is mandatory dt-bindings: mtd: st,spear600-smi: Fix description mtd: rawnand: cadence: Fix error check for dma_alloc_coherent() in cadence_nand_init() mtd: Avoid boot crash in RedBoot partition table parser MAINTAINERS: add Takahiro Kuwano as SPI NOR reviewer MAINTAINERS: remove Tudor Ambarus as SPI NOR maintainer
2026-03-20Merge tag 'iommu-fixes-v7.0-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux Pull iommu fixes from Joerg Roedel: "Intel VT-d: - Abort all pending requests on dev_tlb_inv timeout to avoid hardlockup - Limit IOPF handling to PRI-capable device to avoid SVA attach failure AMD-Vi: - Make sure identity domain is not used when SNP is active Core fixes: - Handle mapping IOVA 0x0 correctly - Fix crash in SVA code - Kernel-doc fix in IO-PGTable code" * tag 'iommu-fixes-v7.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux: iommu/amd: Block identity domain when SNP enabled iommu/sva: Fix crash in iommu_sva_unbind_device() iommu/io-pgtable: fix all kernel-doc warnings in io-pgtable.h iommu: Fix mapping check for 0x0 to avoid re-mapping it iommu/vt-d: Only handle IOPF for SVA when PRI is supported iommu/vt-d: Fix intel iommu iotlb sync hardlockup and retry
2026-03-20Merge tag 'arm64-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Will Deacon: "There's a small crop of fixes for the MPAM resctrl driver, a fix for SCS/PAC patching with the AMDGPU driver and a page-table fix for realms running with 52-bit physical addresses: - Fix DWARF parsing for SCS/PAC patching to work with very large modules (such as the amdgpu driver) - Fixes to the mpam resctrl driver - Fix broken handling of 52-bit physical addresses when sharing memory from within a realm" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: realm: Fix PTE_NS_SHARED for 52bit PA support arm_mpam: Force __iomem casts arm_mpam: Disable preemption when making accesses to fake MSC in kunit test arm_mpam: Fix null pointer dereference when restoring bandwidth counters arm64/scs: Fix handling of advance_loc4
2026-03-20Merge tag 'hyperv-fixes-signed-20260319' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux Pull Hyper-V fixes from Wei Liu: - Fix ARM64 MSHV support (Anirudh Rayabharam) - Fix MSHV driver memory handling issues (Stanislav Kinsburskii) - Update maintainers for Hyper-V DRM driver (Saurabh Sengar) - Misc clean up in MSHV crashdump code (Ard Biesheuvel, Uros Bizjak) - Minor improvements to MSHV code (Mukesh R, Wei Liu) - Revert not yet released MSHV scrub partition hypercall (Wei Liu) * tag 'hyperv-fixes-signed-20260319' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: mshv: Fix error handling in mshv_region_pin MAINTAINERS: Update maintainers for Hyper-V DRM driver mshv: Fix use-after-free in mshv_map_user_memory error path mshv: pass struct mshv_user_mem_region by reference x86/hyperv: Use any general-purpose register when saving %cr2 and %cr8 x86/hyperv: Use current_stack_pointer to avoid asm() in hv_hvcrash_ctxt_save() x86/hyperv: Save segment registers directly to memory in hv_hvcrash_ctxt_save() x86/hyperv: Use __naked attribute to fix stackless C function Revert "mshv: expose the scrub partition hypercall" mshv: add arm64 support for doorbell & intercept SINTs mshv: refactor synic init and cleanup x86/hyperv: print out reserved vectors in hexadecimal
2026-03-21Merge tag 'drm-xe-fixes-2026-03-19' of ↵Dave Airlie
https://gitlab.freedesktop.org/drm/xe/kernel into drm-fixes Driver Changes: - A number of teardown fixes (Daniele, Matt Brost, Zhanjun, Ashutosh) - Skip over non-leaf PTE for PRL generation (Brian) - Fix an unitialized variable (Umesh) - Fix a missing runtime PM reference (Sanjay) Signed-off-by: Dave Airlie <airlied@redhat.com> From: Thomas Hellstrom <thomas.hellstrom@linux.intel.com> Link: https://patch.msgid.link/abxj4_dBHYBiSvDG@fedora
2026-03-20Merge tag 'v7.0-rc4-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds
Pull smb client fixes from Steve French: - Fix reporting of i_blocks - Fix Kerberos mounts with different usernames to same server - Trivial comment cleanup * tag 'v7.0-rc4-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6: smb: client: fix generic/694 due to wrong ->i_blocks cifs: smb1: fix comment typo smb: client: fix krb5 mount with username option
2026-03-20Merge tag 'v7.0-rc4-ksmbd-server-fixes' of git://git.samba.org/ksmbdLinus Torvalds
Pull smb server fixes from Steve French: - Three use after free fixes (in close, in compounded ops, and in tree disconnect) - Multichannel fix - return proper volume identifier (superblock uuid if available) in FS_OBJECT_ID queries * tag 'v7.0-rc4-ksmbd-server-fixes' of git://git.samba.org/ksmbd: ksmbd: fix use-after-free in durable v2 replay of active file handles ksmbd: fix use-after-free of share_conf in compound request ksmbd: use volume UUID in FS_OBJECT_ID_INFORMATION ksmbd: unset conn->binding on failed binding request ksmbd: fix share_conf UAF in tree_conn disconnect
2026-03-21Merge tag 'amd-drm-fixes-7.0-2026-03-19' of ↵Dave Airlie
https://gitlab.freedesktop.org/agd5f/linux into drm-fixes amd-drm-fixes-7.0-2026-03-19: amdgpu: - Fix gamma 2.2 colorop TFs - BO list fix - LTO fix - DC FP fix - DisplayID handling fix - DCN 2.01 fix - MMHUB boundary fixes - ISP fix - TLB fence fix - Hainan pm fix radeon: - Hainan pm fix Signed-off-by: Dave Airlie <airlied@redhat.com> From: Alex Deucher <alexander.deucher@amd.com> Link: https://patch.msgid.link/20260319131013.36639-1-alexander.deucher@amd.com
2026-03-21Merge tag 'drm-misc-fixes-2026-03-19' of ↵Dave Airlie
https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes A doc warning fix and a memory leak fix for vmwgfx, a deadlock fix and interrupt handling fixes for imagination, a locking fix for pagemap_until, a UAF fix for drm_dev_unplug, and a multi-channel audio handling fix for dw-hdmi-qp. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <mripard@redhat.com> Link: https://patch.msgid.link/20260319-lush-righteous-malamute-e7bb98@houat
2026-03-21Merge tag 'drm-intel-fixes-2026-03-19' of ↵Dave Airlie
https://gitlab.freedesktop.org/drm/i915/kernel into drm-fixes - Fix #15771: Screen corruption and stuttering on P14s w/ 3K display - Fix for PSR entry setup frames count on rejected commit - Fix OOPS if firmware is not loaded and suspend is attempted - Fix unlikely NULL deref due to DC6 on probe Signed-off-by: Dave Airlie <airlied@redhat.com> From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: https://patch.msgid.link/abujAnD-lRDCVSKg@jlahtine-mobl
2026-03-20ata: libata-scsi: report correct sense field pointer in ata_scsiop_maint_in()Damien Le Moal
Commit 4ab7bb976343 ("ata: libata-scsi: Refactor ata_scsiop_maint_in()") modified ata_scsiop_maint_in() to directly call ata_scsi_set_invalid_field() to set the field pointer of the sense data of a failed MAINTENANCE IN command. However, in the case of an invalid command format, the sense data field incorrectly indicates byte 1 of the CDB. Fix this to indicate byte 2 of the command. Reported-by: Guenter Roeck <linux@roeck-us.net> Fixes: 4ab7bb976343 ("ata: libata-scsi: Refactor ata_scsiop_maint_in()") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Niklas Cassel <cassel@kernel.org>
2026-03-19Merge tag 'parisc-for-7.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc fix from Helge Deller: "Fix for the cacheflush() syscall which had D/I caches mixed up" * tag 'parisc-for-7.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Flush correct cache in cacheflush() syscall
2026-03-19Merge tag 'pci-v7.0-fixes-4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci Pull pci fixes from Bjorn Helgaas: - Create pwrctrl devices only for DT nodes below a PCI controller that describe PCI devices and are related to a power supply; this prevents waiting indefinitely for pwrctrl drivers that will never probe (Manivannan Sadhasivam) - Restore endpoint BAR mapping on subrange setup failure to make selftest reliable (Koichiro Den) * tag 'pci-v7.0-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: PCI: endpoint: pci-epf-test: Roll back BAR mapping when subrange setup fails PCI/pwrctrl: Create pwrctrl devices only for PCI device nodes PCI/pwrctrl: Ensure that remote endpoint node parent has supply requirement
2026-03-19io_uring/kbuf: propagate BUF_MORE through early buffer commit pathJens Axboe
When io_should_commit() returns true (eg for non-pollable files), buffer commit happens at buffer selection time and sel->buf_list is set to NULL. When __io_put_kbufs() generates CQE flags at completion time, it calls __io_put_kbuf_ring() which finds a NULL buffer_list and hence cannot determine whether the buffer was consumed or not. This means that IORING_CQE_F_BUF_MORE is never set for non-pollable input with incrementally consumed buffers. Likewise for io_buffers_select(), which always commits upfront and discards the return value of io_kbuf_commit(). Add REQ_F_BUF_MORE to store the result of io_kbuf_commit() during early commit. Then __io_put_kbuf_ring() can check this flag and set IORING_F_BUF_MORE accordingy. Reported-by: Martin Michaelis <code@mgjm.de> Cc: stable@vger.kernel.org Fixes: ae98dbf43d75 ("io_uring/kbuf: add support for incremental buffer consumption") Link: https://github.com/axboe/liburing/issues/1553 Signed-off-by: Jens Axboe <axboe@kernel.dk>
2026-03-19io_uring/kbuf: fix missing BUF_MORE for incremental buffers at EOFJens Axboe
For a zero length transfer, io_kbuf_inc_commit() is called with !len. Since we never enter the while loop to consume the buffers, io_kbuf_inc_commit() ends up returning true, consuming the buffer. But if no data was consumed, by definition it cannot have consumed the buffer. Return false for that case. Reported-by: Martin Michaelis <code@mgjm.de> Cc: stable@vger.kernel.org Fixes: ae98dbf43d75 ("io_uring/kbuf: add support for incremental buffer consumption") Link: https://github.com/axboe/liburing/issues/1553 Signed-off-by: Jens Axboe <axboe@kernel.dk>
2026-03-19smb: client: fix generic/694 due to wrong ->i_blocksPaulo Alcantara
When updating ->i_size, make sure to always update ->i_blocks as well until we query new allocation size from the server. generic/694 was failing because smb3_simple_falloc() was missing the update of ->i_blocks after calling cifs_setsize(). So, fix this by updating ->i_blocks directly in cifs_setsize(), so all places that call it doesn't need to worry about updating ->i_blocks later. Reported-by: Shyam Prasad N <sprasad@microsoft.com> Closes: https://lore.kernel.org/r/CANT5p=rqgRwaADB=b_PhJkqXjtfq3SFv41SSTXSVEHnuh871pA@mail.gmail.com Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org> Cc: David Howells <dhowells@redhat.com> Cc: linux-cifs@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
2026-03-19Merge tag 'net-7.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net Pull networking fixes from Jakub Kicinski: "Including fixes from wireless, Bluetooth and netfilter. Nothing too exciting here, mostly fixes for corner cases. Current release - fix to a fix: - bonding: prevent potential infinite loop in bond_header_parse() Current release - new code bugs: - wifi: mac80211: check tdls flag in ieee80211_tdls_oper Previous releases - regressions: - af_unix: give up GC if MSG_PEEK intervened - netfilter: conntrack: add missing netlink policy validations - NFC: nxp-nci: allow GPIOs to sleep" * tag 'net-7.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (78 commits) MPTCP: fix lock class name family in pm_nl_create_listen_socket icmp: fix NULL pointer dereference in icmp_tag_validation() net: dsa: bcm_sf2: fix missing clk_disable_unprepare() in error paths net: shaper: protect from late creation of hierarchy net: shaper: protect late read accesses to the hierarchy net: mvpp2: guard flow control update with global_tx_fc in buffer switching nfnetlink_osf: validate individual option lengths in fingerprints netfilter: nf_tables: release flowtable after rcu grace period on error netfilter: bpf: defer hook memory release until rcu readers are done net: bonding: fix NULL deref in bond_debug_rlb_hash_show udp_tunnel: fix NULL deref caused by udp_sock_create6 when CONFIG_IPV6=n net/mlx5e: Fix race condition during IPSec ESN update net/mlx5e: Prevent concurrent access to IPSec ASO context net/mlx5: qos: Restrict RTNL area to avoid a lock cycle ipv6: add NULL checks for idev in SRv6 paths NFC: nxp-nci: allow GPIOs to sleep net: macb: fix uninitialized rx_fs_lock net: macb: fix use-after-free access to PTP clock netdevsim: drop PSP ext ref on forward failure wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure ...
2026-03-19drm/xe: Fix missing runtime PM reference in ccs_mode_storeSanjay Yadav
ccs_mode_store() calls xe_gt_reset() which internally invokes xe_pm_runtime_get_noresume(). That function requires the caller to already hold an outer runtime PM reference and warns if none is held: [46.891177] xe 0000:03:00.0: [drm] Missing outer runtime PM protection [46.891178] WARNING: drivers/gpu/drm/xe/xe_pm.c:885 at xe_pm_runtime_get_noresume+0x8b/0xc0 Fix this by protecting xe_gt_reset() with the scope-based guard(xe_pm_runtime)(xe), which is the preferred form when the reference lifetime matches a single scope. v2: - Use scope-based guard(xe_pm_runtime)(xe) (Shuicheng) - Update commit message accordingly Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/7593 Fixes: 480b358e7d8e ("drm/xe: Do not wake device during a GT reset") Cc: <stable@vger.kernel.org> # v6.19+ Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com> Cc: Matthew Brost <matthew.brost@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Shuicheng Lin <shuicheng.lin@intel.com> Suggested-by: Matthew Auld <matthew.auld@intel.com> Signed-off-by: Sanjay Yadav <sanjay.kumar.yadav@intel.com> Reviewed-by: Shuicheng Lin <shuicheng.lin@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Signed-off-by: Matthew Auld <matthew.auld@intel.com> Link: https://patch.msgid.link/20260313071608.3459480-2-sanjay.kumar.yadav@intel.com (cherry picked from commit 7937ea733f79b3f25e802a0c8360bf7423856f36) Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
2026-03-19MPTCP: fix lock class name family in pm_nl_create_listen_socketLi Xiasong
In mptcp_pm_nl_create_listen_socket(), use entry->addr.family instead of sk->sk_family for lock class setup. The 'sk' parameter is a netlink socket, not the MPTCP subflow socket being created. Fixes: cee4034a3db1 ("mptcp: fix lockdep false positive in mptcp_pm_nl_create_listen_socket()") Signed-off-by: Li Xiasong <lixiasong1@huawei.com> Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Link: https://patch.msgid.link/20260319112159.3118874-1-lixiasong1@huawei.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-19icmp: fix NULL pointer dereference in icmp_tag_validation()Weiming Shi
icmp_tag_validation() unconditionally dereferences the result of rcu_dereference(inet_protos[proto]) without checking for NULL. The inet_protos[] array is sparse -- only about 15 of 256 protocol numbers have registered handlers. When ip_no_pmtu_disc is set to 3 (hardened PMTU mode) and the kernel receives an ICMP Fragmentation Needed error with a quoted inner IP header containing an unregistered protocol number, the NULL dereference causes a kernel panic in softirq context. Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] RIP: 0010:icmp_unreach (net/ipv4/icmp.c:1085 net/ipv4/icmp.c:1143) Call Trace: <IRQ> icmp_rcv (net/ipv4/icmp.c:1527) ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207) ip_local_deliver_finish (net/ipv4/ip_input.c:242) ip_local_deliver (net/ipv4/ip_input.c:262) ip_rcv (net/ipv4/ip_input.c:573) __netif_receive_skb_one_core (net/core/dev.c:6164) process_backlog (net/core/dev.c:6628) handle_softirqs (kernel/softirq.c:561) </IRQ> Add a NULL check before accessing icmp_strict_tag_validation. If the protocol has no registered handler, return false since it cannot perform strict tag validation. Fixes: 8ed1dc44d3e9 ("ipv4: introduce hardened ip_no_pmtu_disc mode") Reported-by: Xiang Mei <xmei5@asu.edu> Signed-off-by: Weiming Shi <bestswngs@gmail.com> Link: https://patch.msgid.link/20260318130558.1050247-4-bestswngs@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-19net: dsa: bcm_sf2: fix missing clk_disable_unprepare() in error pathsAnas Iqbal
Smatch reports: drivers/net/dsa/bcm_sf2.c:997 bcm_sf2_sw_resume() warn: 'priv->clk' from clk_prepare_enable() not released on lines: 983,990. The clock enabled by clk_prepare_enable() in bcm_sf2_sw_resume() is not released if bcm_sf2_sw_rst() or bcm_sf2_cfp_resume() fails. Add the missing clk_disable_unprepare() calls in the error paths to properly release the clock resource. Fixes: e9ec5c3bd238 ("net: dsa: bcm_sf2: request and handle clocks") Reviewed-by: Jonas Gorski <jonas.gorski@gmail.com> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Signed-off-by: Anas Iqbal <mohd.abd.6602@gmail.com> Link: https://patch.msgid.link/20260318084212.1287-1-mohd.abd.6602@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-19drm/xe: Open-code GGTT MMIO access protectionMatthew Brost
GGTT MMIO access is currently protected by hotplug (drm_dev_enter), which works correctly when the driver loads successfully and is later unbound or unloaded. However, if driver load fails, this protection is insufficient because drm_dev_unplug() is never called. Additionally, devm release functions cannot guarantee that all BOs with GGTT mappings are destroyed before the GGTT MMIO region is removed, as some BOs may be freed asynchronously by worker threads. To address this, introduce an open-coded flag, protected by the GGTT lock, that guards GGTT MMIO access. The flag is cleared during the dev_fini_ggtt devm release function to ensure MMIO access is disabled once teardown begins. Cc: stable@vger.kernel.org Fixes: 919bb54e989c ("drm/xe: Fix missing runtime outer protection for ggtt_remove_node") Reviewed-by: Zhanjun Dong <zhanjun.dong@intel.com> Signed-off-by: Matthew Brost <matthew.brost@intel.com> Link: https://patch.msgid.link/20260310225039.1320161-8-zhanjun.dong@intel.com (cherry picked from commit 4f3a998a173b4325c2efd90bdadc6ccd3ad9a431) Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
2026-03-19Merge tag 'pm-7.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management fixes from Rafael Wysocki: "These fix an idle loop issue exposed by recent changes and a race condition related to device removal in the runtime PM core code: - Consolidate the handling of two special cases in the idle loop that occur when only one CPU idle state is present (Rafael Wysocki) - Fix a race condition related to device removal in the runtime PM core code that may cause a stale device object pointer to be dereferenced (Bart Van Assche)" * tag 'pm-7.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PM: runtime: Fix a race condition related to device removal sched: idle: Consolidate the handling of two special cases
2026-03-19Merge tag 'acpi-7.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI support fixes from Rafael Wysocki: "These fix an MFD child automatic modprobe issue introduced recently, an ACPI processor driver issue introduced by a previous fix and an ACPICA issue causing confusing messages regarding _DSM arguments to be printed: - Update the format of the last argument of _DSM to avoid printing confusing error messages in some cases (Saket Dumbre) - Fix MFD child automatic modprobe issue by removing a stale check from acpi_companion_match() (Pratap Nirujogi) - Prevent possible use-after-free in acpi_processor_errata_piix4() from occurring by rearranging the code to print debug messages while holding references to relevant device objects (Rafael Wysocki)" * tag 'acpi-7.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI: bus: Fix MFD child automatic modprobe issue ACPI: processor: Fix previous acpi_processor_errata_piix4() fix ACPICA: Update the format of Arg3 of _DSM
2026-03-19Merge tag 'nf-26-03-19' of ↵Paolo Abeni
https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf Florian Westphal says: ==================== netfilter: updates for net The following patchset contains Netfilter fixes for *net*: 1) Fix UaF when netfilter bpf link goes away while nfnetlink dumps current hook list, we have to wait until rcu readers are gone. 2) Fix UaF when flowtable fails to register all devices, similar bug as 1). From Pablo Neira Ayuso. 3) nfnetlink_osf fails to properly validate option length fields. From Weiming Shi. netfilter pull request nf-26-03-19 * tag 'nf-26-03-19' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf: nfnetlink_osf: validate individual option lengths in fingerprints netfilter: nf_tables: release flowtable after rcu grace period on error netfilter: bpf: defer hook memory release until rcu readers are done ==================== Link: https://patch.msgid.link/20260319093834.19933-1-fw@strlen.de Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-03-19Merge branches 'acpica' and 'acpi-bus'Rafael J. Wysocki
Merge an ACPICA fix and a core ACPI support code fix for 7.0-rc5: - Update the format of the last argument of _DSM to avoid printing confusing error messages in some cases (Saket Dumbre) - Fix MFD child automatic modprobe issue by removing a stale check from acpi_companion_match() (Pratap Nirujogi) * acpica: ACPICA: Update the format of Arg3 of _DSM * acpi-bus: ACPI: bus: Fix MFD child automatic modprobe issue
2026-03-19Merge branch 'pm-runtime'Rafael J. Wysocki
Merge a fix for a race condition related to device removal (Bart Van Assche) for 7.0-rc5. * pm-runtime: PM: runtime: Fix a race condition related to device removal
2026-03-19drm/xe/lrc: Fix uninitialized new_ts when capturing context timestampUmesh Nerlige Ramappa
Getting engine specific CTX TIMESTAMP register can fail. In that case, if the context is active, new_ts is uninitialized. Fix that case by initializing new_ts to the last value that was sampled in SW - lrc->ctx_timestamp. Flagged by static analysis. v2: Fix new_ts initialization (Ashutosh) Fixes: bb63e7257e63 ("drm/xe: Avoid toggling schedule state to check LRC timestamp in TDR") Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com> Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com> Link: https://patch.msgid.link/20260312125308.3126607-2-umesh.nerlige.ramappa@intel.com (cherry picked from commit 466e75d48038af252187855058a7a9312db9d2f8) Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
2026-03-19drm/xe/oa: Allow reading after disabling OA streamAshutosh Dixit
Some OA data might be present in the OA buffer when OA stream is disabled. Allow UMD's to retrieve this data, so that all data till the point when OA stream is disabled can be retrieved. v2: Update tail pointer after disable (Umesh) Fixes: efb315d0a013 ("drm/xe/oa/uapi: Read file_operation") Cc: stable@vger.kernel.org Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com> Reviewed-by: Umesh Nerlige Ramappa<umesh.nerlige.ramappa@intel.com> Link: https://patch.msgid.link/20260313053630.3176100-1-ashutosh.dixit@intel.com (cherry picked from commit 4ff57c5e8dbba23b5457be12f9709d5c016da16e) Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
2026-03-19drm/xe: Skip over non leaf pte for PRL generationBrian Nguyen
The check using xe_child->base.children was insufficient in determining if a pte was a leaf node. So explicitly skip over every non-leaf pt and conditionally abort if there is a scenario where a non-leaf pt is interleaved between leaf pt, which results in the page walker skipping over some leaf pt. Note that the behavior being targeted for abort is PD[0] = 2M PTE PD[1] = PT -> 512 4K PTEs PD[2] = 2M PTE results in abort, page walker won't descend PD[1]. With new abort, ensuring valid PRL before handling a second abort. v2: - Revert to previous assert. - Revised non-leaf handling for interleaf child pt and leaf pte. - Update comments to specifications. (Stuart) - Remove unnecessary XE_PTE_PS64. (Matthew B) v3: - Modify secondary abort to only check non-leaf PTEs. (Matthew B) Fixes: b912138df299 ("drm/xe: Create page reclaim list on unbind") Signed-off-by: Brian Nguyen <brian3.nguyen@intel.com> Reviewed-by: Matthew Brost <matthew.brost@intel.com> Cc: Stuart Summers <stuart.summers@intel.com> Link: https://patch.msgid.link/20260305171546.67691-6-brian3.nguyen@intel.com Signed-off-by: Matt Roper <matthew.d.roper@intel.com> (cherry picked from commit 1d123587525db86cc8f0d2beb35d9e33ca3ade83) Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
2026-03-19drm/xe/guc: Ensure CT state transitions via STOP before DISABLEDZhanjun Dong
The GuC CT state transition requires moving to the STOP state before entering the DISABLED state. Update the driver teardown sequence to make the proper state machine transitions. Fixes: ee4b32220a6b ("drm/xe/guc: Add devm release action to safely tear down CT") Cc: stable@vger.kernel.org Signed-off-by: Zhanjun Dong <zhanjun.dong@intel.com> Reviewed-by: Matthew Brost <matthew.brost@intel.com> Signed-off-by: Matthew Brost <matthew.brost@intel.com> Link: https://patch.msgid.link/20260310225039.1320161-6-zhanjun.dong@intel.com (cherry picked from commit dace8cb0032f57ea67c87b3b92ad73c89dd2db44) Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
2026-03-19drm/xe: Trigger queue cleanup if not in wedged mode 2Matthew Brost
The intent of wedging a device is to allow queues to continue running only in wedged mode 2. In other modes, queues should initiate cleanup and signal all remaining fences. Fix xe_guc_submit_wedge to correctly clean up queues when wedge mode != 2. Fixes: 7dbe8af13c18 ("drm/xe: Wedge the entire device") Cc: stable@vger.kernel.org Reviewed-by: Zhanjun Dong <zhanjun.dong@intel.com> Signed-off-by: Matthew Brost <matthew.brost@intel.com> Link: https://patch.msgid.link/20260310225039.1320161-4-zhanjun.dong@intel.com (cherry picked from commit e25ba41c8227c5393c16e4aab398076014bd345f) Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
2026-03-19drm/xe: Forcefully tear down exec queues in GuC submit finiMatthew Brost
In GuC submit fini, forcefully tear down any exec queues by disabling CTs, stopping the scheduler (which cleans up lost G2H), killing all remaining queues, and resuming scheduling to allow any remaining cleanup actions to complete and signal any remaining fences. Split guc_submit_fini into device related and software only part. Using device-managed and drm-managed action guarantees the correct ordering of cleanup. Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs") Cc: stable@vger.kernel.org Reviewed-by: Zhanjun Dong <zhanjun.dong@intel.com> Signed-off-by: Matthew Brost <matthew.brost@intel.com> Link: https://patch.msgid.link/20260310225039.1320161-3-zhanjun.dong@intel.com (cherry picked from commit a6ab444a111a59924bd9d0c1e0613a75a0a40b89) Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
2026-03-19drm/xe: Always kill exec queues in xe_guc_submit_pause_abortMatthew Brost
xe_guc_submit_pause_abort is intended to be called after something disastrous occurs (e.g., VF migration fails, device wedging, or driver unload) and should immediately trigger the teardown of remaining submission state. With that, kill any remaining queues in this function. Fixes: 7c4b7e34c83b ("drm/xe/vf: Abort VF post migration recovery on failure") Cc: stable@vger.kernel.org Signed-off-by: Zhanjun Dong <zhanjun.dong@intel.com> Reviewed-by: Stuart Summers <stuart.summers@intel.com> Signed-off-by: Matthew Brost <matthew.brost@intel.com> Link: https://patch.msgid.link/20260310225039.1320161-2-zhanjun.dong@intel.com (cherry picked from commit 78f3bf00be4f15daead02ba32d4737129419c902) Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
2026-03-19drm/xe/guc: Fail immediately on GuC load errorDaniele Ceraolo Spurio
By using the same variable for both the return of poll_timeout_us and the return of the polled function guc_wait_ucode, the return value of the latter is overwritten and lost after exiting the polling loop. Since guc_wait_ucode returns -1 on GuC load failure, we lose that information and always continue as if the GuC had been loaded correctly. This is fixed by simply using 2 separate variables. Fixes: a4916b4da448 ("drm/xe/guc: Refactor GuC load to use poll_timeout_us()") Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Reviewed-by: Matthew Brost <matthew.brost@intel.com> Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com> Link: https://patch.msgid.link/20260303001732.2540493-2-daniele.ceraolospurio@intel.com (cherry picked from commit c85ec5c5753a46b5c2aea1292536487be9470ffe) Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
2026-03-19net: shaper: protect from late creation of hierarchyJakub Kicinski
We look up a netdev during prep of Netlink ops (pre- callbacks) and take a ref to it. Then later in the body of the callback we take its lock or RCU which are the actual protections. The netdev may get unregistered in between the time we take the ref and the time we lock it. We may allocate the hierarchy after flush has already run, which would lead to a leak. Take the instance lock in pre- already, this saves us from the race and removes the need for dedicated lock/unlock callbacks completely. After all, if there's any chance of write happening concurrently with the flush - we're back to leaking the hierarchy. We may take the lock for devices which don't support shapers but we're only dealing with SET operations here, not taking the lock would be optimizing for an error case. Fixes: 93954b40f6a4 ("net-shapers: implement NL set and delete operations") Link: https://lore.kernel.org/20260309173450.538026-1-p@1g4.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> Link: https://patch.msgid.link/20260317161014.779569-2-kuba@kernel.org Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-03-19net: shaper: protect late read accesses to the hierarchyJakub Kicinski
We look up a netdev during prep of Netlink ops (pre- callbacks) and take a ref to it. Then later in the body of the callback we take its lock or RCU which are the actual protections. This is not proper, a conversion from a ref to a locked netdev must include a liveness check (a check if the netdev hasn't been unregistered already). Fix the read cases (those under RCU). Writes needs a separate change to protect from creating the hierarchy after flush has already run. Fixes: 4b623f9f0f59 ("net-shapers: implement NL get operation") Reported-by: Paul Moses <p@1g4.org> Link: https://lore.kernel.org/20260309173450.538026-1-p@1g4.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> Link: https://patch.msgid.link/20260317161014.779569-1-kuba@kernel.org Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-03-19arm64: realm: Fix PTE_NS_SHARED for 52bit PA supportSuzuki K Poulose
With LPA/LPA2, the top bits of the PFN (Bits[51:48]) end up in the lower bits of the PTE. So, simply creating a mask of the "top IPA bit" doesn't work well for these configurations to set the "top" bit at the output of Stage1 translation. Fix this by using the __phys_to_pte_val() to do the right thing for all configurations. Tested using, kvmtool, placing the memory at a higher address (-m <size>@<Addr>). e.g: # lkvm run --realm -c 4 -m 512M@@128T -k Image --console serial sh-5.0# dmesg | grep "LPA2\|RSI" [ 0.000000] RME: Using RSI version 1.0 [ 0.000000] CPU features: detected: 52-bit Virtual Addressing (LPA2) [ 0.777354] CPU features: detected: 52-bit Virtual Addressing for KVM (LPA2) Fixes: 399306954996 ("arm64: realm: Query IPA size from the RMM") Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Steven Price <steven.price@arm.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Reviewed-by: Steven Price <steven.price@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
2026-03-19net: mvpp2: guard flow control update with global_tx_fc in buffer switchingMuhammad Hammad Ijaz
mvpp2_bm_switch_buffers() unconditionally calls mvpp2_bm_pool_update_priv_fc() when switching between per-cpu and shared buffer pool modes. This function programs CM3 flow control registers via mvpp2_cm3_read()/mvpp2_cm3_write(), which dereference priv->cm3_base without any NULL check. When the CM3 SRAM resource is not present in the device tree (the third reg entry added by commit 60523583b07c ("dts: marvell: add CM3 SRAM memory to cp11x ethernet device tree")), priv->cm3_base remains NULL and priv->global_tx_fc is false. Any operation that triggers mvpp2_bm_switch_buffers(), for example an MTU change that crosses the jumbo frame threshold, will crash: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits pc : readl+0x0/0x18 lr : mvpp2_cm3_read.isra.0+0x14/0x20 Call trace: readl+0x0/0x18 mvpp2_bm_pool_update_fc+0x40/0x12c mvpp2_bm_pool_update_priv_fc+0x94/0xd8 mvpp2_bm_switch_buffers.isra.0+0x80/0x1c0 mvpp2_change_mtu+0x140/0x380 __dev_set_mtu+0x1c/0x38 dev_set_mtu_ext+0x78/0x118 dev_set_mtu+0x48/0xa8 dev_ifsioc+0x21c/0x43c dev_ioctl+0x2d8/0x42c sock_ioctl+0x314/0x378 Every other flow control call site in the driver already guards hardware access with either priv->global_tx_fc or port->tx_fc. mvpp2_bm_switch_buffers() is the only place that omits this check. Add the missing priv->global_tx_fc guard to both the disable and re-enable calls in mvpp2_bm_switch_buffers(), consistent with the rest of the driver. Fixes: 3a616b92a9d1 ("net: mvpp2: Add TX flow control support for jumbo frames") Signed-off-by: Muhammad Hammad Ijaz <mhijaz@amazon.com> Reviewed-by: Gunnar Kudrjavets <gunnarku@amazon.com> Link: https://patch.msgid.link/20260316193157.65748-1-mhijaz@amazon.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-03-19nfnetlink_osf: validate individual option lengths in fingerprintsWeiming Shi
nfnl_osf_add_callback() validates opt_num bounds and string NUL-termination but does not check individual option length fields. A zero-length option causes nf_osf_match_one() to enter the option matching loop even when foptsize sums to zero, which matches packets with no TCP options where ctx->optp is NULL: Oops: general protection fault KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:nf_osf_match_one (net/netfilter/nfnetlink_osf.c:98) Call Trace: nf_osf_match (net/netfilter/nfnetlink_osf.c:227) xt_osf_match_packet (net/netfilter/xt_osf.c:32) ipt_do_table (net/ipv4/netfilter/ip_tables.c:293) nf_hook_slow (net/netfilter/core.c:623) ip_local_deliver (net/ipv4/ip_input.c:262) ip_rcv (net/ipv4/ip_input.c:573) Additionally, an MSS option (kind=2) with length < 4 causes out-of-bounds reads when nf_osf_match_one() unconditionally accesses optp[2] and optp[3] for MSS value extraction. While RFC 9293 section 3.2 specifies that the MSS option is always exactly 4 bytes (Kind=2, Length=4), the check uses "< 4" rather than "!= 4" because lengths greater than 4 do not cause memory safety issues -- the buffer is guaranteed to be at least foptsize bytes by the ctx->optsize == foptsize check. Reject fingerprints where any option has zero length, or where an MSS option has length less than 4, at add time rather than trusting these values in the packet matching hot path. Fixes: 11eeef41d5f6 ("netfilter: passive OS fingerprint xtables match") Reported-by: Xiang Mei <xmei5@asu.edu> Signed-off-by: Weiming Shi <bestswngs@gmail.com> Signed-off-by: Florian Westphal <fw@strlen.de>
2026-03-19netfilter: nf_tables: release flowtable after rcu grace period on errorPablo Neira Ayuso
Call synchronize_rcu() after unregistering the hooks from error path, since a hook that already refers to this flowtable can be already registered, exposing this flowtable to packet path and nfnetlink_hook control plane. This error path is rare, it should only happen by reaching the maximum number hooks or by failing to set up to hardware offload, just call synchronize_rcu(). There is a check for already used device hooks by different flowtable that could result in EEXIST at this late stage. The hook parser can be updated to perform this check earlier to this error path really becomes rarely exercised. Uncovered by KASAN reported as use-after-free from nfnetlink_hook path when dumping hooks. Fixes: 3b49e2e94e6e ("netfilter: nf_tables: add flow table netlink frontend") Reported-by: Yiming Qian <yimingqian591@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Florian Westphal <fw@strlen.de>