Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v7.0-rc7 2026-03-27T11:48:10+00:00 2026-03-27T11:48:10+00:00 Fei Lv feilv@asrmicro.com 2024-07-22T10:14:43+00:00 urn:sha1:1f6ee9be92f8df85a8c9a5a78c20fd39c0c21a95 Commit 7d6899fb69d25 ("ovl: fsync after metadata copy-up") was done to fix durability of overlayfs copy up on an upper filesystem which does not enforce ordering on storing of metadata changes (e.g. ubifs). In an earlier revision of the regressing commit by Lei Lv, the metadata fsync behavior was opt-in via a new "fsync=strict" mount option. We were hoping that the opt-in mount option could be avoided, so the change was only made to depend on metacopy=off, in the hope of not hurting performance of metadata heavy workloads, which are more likely to be using metacopy=on. This hope was proven wrong by a performance regression report from Google COS workload after upgrade to kernel 6.12. This is an adaptation of Lei's original "fsync=strict" mount option to the existing upstream code. The new mount option is mutually exclusive with the "volatile" mount option, so the latter is now an alias to the "fsync=volatile" mount option. Reported-by: Chenglong Tang <chenglongtang@google.com> Closes: https://lore.kernel.org/linux-unionfs/CAOdxtTadAFH01Vui1FvWfcmQ8jH1O45owTzUcpYbNvBxnLeM7Q@mail.gmail.com/ Link: https://lore.kernel.org/linux-unionfs/CAOQ4uxgKC1SgjMWre=fUb00v8rxtd6sQi-S+dxR8oDzAuiGu8g@mail.gmail.com/ Fixes: 7d6899fb69d25 ("ovl: fsync after metadata copy-up") Depends: 50e638beb67e0 ("ovl: Use str_on_off() helper in ovl_show_options()") Cc: stable@vger.kernel.org # v6.12+ Signed-off-by: Fei Lv <feilv@asrmicro.com> Signed-off-by: Amir Goldstein <amir73il@gmail.com> 2026-02-17T23:08:24+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-02-17T23:08:24+00:00 urn:sha1:0ba83f0968f34543e57d4a4eddc0a9d0c8c88627 Pull overlayfs update from Amir Goldstein: "Relax the semantics of uuid=off to cater to a use case of overlayfs lower layers on btrfs clones, whose UUID are ephemeral and an upper layer on a different filesystem" * tag 'ovl-update-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs: ovl: relax requirement for uuid=off,index=on 2026-02-16T21:00:36+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-02-16T21:00:36+00:00 urn:sha1:45a43ac5acc90b8f4835eea92692f620e561a06b Pull more misc vfs updates from Christian Brauner: "Features: - Optimize close_range() from O(range size) to O(active FDs) by using find_next_bit() on the open_fds bitmap instead of linearly scanning the entire requested range. This is a significant improvement for large-range close operations on sparse file descriptor tables. - Add FS_XFLAG_VERITY file attribute for fs-verity files, retrievable via FS_IOC_FSGETXATTR and file_getattr(). The flag is read-only. Add tracepoints for fs-verity enable and verify operations, replacing the previously removed debug printk's. - Prevent nfsd from exporting special kernel filesystems like pidfs and nsfs. These filesystems have custom ->open() and ->permission() export methods that are designed for open_by_handle_at(2) only and are incompatible with nfsd. Update the exportfs documentation accordingly. Fixes: - Fix KMSAN uninit-value in ovl_fill_real() where strcmp() was used on a non-null-terminated decrypted directory entry name from fscrypt. This triggered on encrypted lower layers when the decrypted name buffer contained uninitialized tail data. The fix also adds VFS-level name_is_dot(), name_is_dotdot(), and name_is_dot_dotdot() helpers, replacing various open-coded "." and ".." checks across the tree. - Fix read-only fsflags not being reset together with xflags in vfs_fileattr_set(). Currently harmless since no read-only xflags overlap with flags, but this would cause inconsistencies for any future shared read-only flag - Return -EREMOTE instead of -ESRCH from PIDFD_GET_INFO when the target process is in a different pid namespace. This lets userspace distinguish "process exited" from "process in another namespace", matching glibc's pidfd_getpid() behavior Cleanups: - Use C-string literals in the Rust seq_file bindings, replacing the kernel::c_str!() macro (available since Rust 1.77) - Fix typo in d_walk_ret enum comment, add porting notes for the readlink_copy() calling convention change" * tag 'vfs-7.0-rc1.misc.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: fs: add porting notes about readlink_copy() pidfs: return -EREMOTE when PIDFD_GET_INFO is called on another ns nfsd: do not allow exporting of special kernel filesystems exportfs: clarify the documentation of open()/permission() expotrfs ops fsverity: add tracepoints fs: add FS_XFLAG_VERITY for fs-verity files rust: seq_file: replace `kernel::c_str!` with C-Strings fs: dcache: fix typo in enum d_walk_ret comment ovl: use name_is_dot* helpers in readdir code fs: add helpers name_is_dot{,dot,_dotdot} ovl: Fix uninit-value in ovl_fill_real fs: reset read-only fsflags together with xflags fs/file: optimize close_range() complexity from O(N) to O(Sparse) 2026-02-14T17:48:10+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-02-14T17:48:10+00:00 urn:sha1:3e48a11675c50698374d4ac596fb506736eb1c53 Pull f2fs updates from Jaegeuk Kim: "In this development cycle, we focused on several key performance optimizations: - introducing large folio support to enhance read speeds for immutable files - reducing checkpoint=enable latency by flushing only committed dirty pages - implementing tracepoints to diagnose and resolve lock priority inversion. Additionally, we introduced the packed_ssa feature to optimize the SSA footprint when utilizing large block sizes. Detail summary: Enhancements: - support large folio for immutable non-compressed case - support non-4KB block size without packed_ssa feature - optimize f2fs_enable_checkpoint() to avoid long delay - optimize f2fs_overwrite_io() for f2fs_iomap_begin - optimize NAT block loading during checkpoint write - add write latency stats for NAT and SIT blocks in f2fs_write_checkpoint - pin files do not require sbi->writepages lock for ordering - avoid f2fs_map_blocks() for consecutive holes in readpages - flush plug periodically during GC to maximize readahead effect - add tracepoints to catch lock overheads - add several sysfs entries to tune internal lock priorities Fixes: - fix lock priority inversion issue - fix incomplete block usage in compact SSA summaries - fix to show simulate_lock_timeout correctly - fix to avoid mapping wrong physical block for swapfile - fix IS_CHECKPOINTED flag inconsistency issue caused by concurrent atomic commit and checkpoint writes - fix to avoid UAF in f2fs_write_end_io()" * tag 'f2fs-for-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (61 commits) f2fs: sysfs: introduce critical_task_priority f2fs: introduce trace_f2fs_priority_update f2fs: fix lock priority inversion issue f2fs: optimize f2fs_overwrite_io() for f2fs_iomap_begin f2fs: fix incomplete block usage in compact SSA summaries f2fs: decrease maximum flush retry count in f2fs_enable_checkpoint() f2fs: optimize NAT block loading during checkpoint write f2fs: change size parameter of __has_cursum_space() to unsigned int f2fs: add write latency stats for NAT and SIT blocks in f2fs_write_checkpoint f2fs: pin files do not require sbi->writepages lock for ordering f2fs: fix to show simulate_lock_timeout correctly f2fs: introduce FAULT_SKIP_WRITE f2fs: check skipped write in f2fs_enable_checkpoint() Revert "f2fs: add timeout in f2fs_enable_checkpoint()" f2fs: fix to unlock folio in f2fs_read_data_large_folio() f2fs: fix error path handling in f2fs_read_data_large_folio() f2fs: use folio_end_read f2fs: fix to avoid mapping wrong physical block for swapfile f2fs: avoid f2fs_map_blocks() for consecutive holes in readpages f2fs: advance index and offset after zeroing in large folio read ... 2026-02-12T20:13:01+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-02-12T20:13:01+00:00 urn:sha1:136114e0abf03005e182d75761ab694648e6d388 Pull non-MM updates from Andrew Morton: - "ocfs2: give ocfs2 the ability to reclaim suballocator free bg" saves disk space by teaching ocfs2 to reclaim suballocator block group space (Heming Zhao) - "Add ARRAY_END(), and use it to fix off-by-one bugs" adds the ARRAY_END() macro and uses it in various places (Alejandro Colomar) - "vmcoreinfo: support VMCOREINFO_BYTES larger than PAGE_SIZE" makes the vmcore code future-safe, if VMCOREINFO_BYTES ever exceeds the page size (Pnina Feder) - "kallsyms: Prevent invalid access when showing module buildid" cleans up kallsyms code related to module buildid and fixes an invalid access crash when printing backtraces (Petr Mladek) - "Address page fault in ima_restore_measurement_list()" fixes a kexec-related crash that can occur when booting the second-stage kernel on x86 (Harshit Mogalapalli) - "kho: ABI headers and Documentation updates" updates the kexec handover ABI documentation (Mike Rapoport) - "Align atomic storage" adds the __aligned attribute to atomic_t and atomic64_t definitions to get natural alignment of both types on csky, m68k, microblaze, nios2, openrisc and sh (Finn Thain) - "kho: clean up page initialization logic" simplifies the page initialization logic in kho_restore_page() (Pratyush Yadav) - "Unload linux/kernel.h" moves several things out of kernel.h and into more appropriate places (Yury Norov) - "don't abuse task_struct.group_leader" removes the usage of ->group_leader when it is "obviously unnecessary" (Oleg Nesterov) - "list private v2 & luo flb" adds some infrastructure improvements to the live update orchestrator (Pasha Tatashin) * tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (107 commits) watchdog/hardlockup: simplify perf event probe and remove per-cpu dependency procfs: fix missing RCU protection when reading real_parent in do_task_stat() watchdog/softlockup: fix sample ring index wrap in need_counting_irqs() kcsan, compiler_types: avoid duplicate type issues in BPF Type Format kho: fix doc for kho_restore_pages() tests/liveupdate: add in-kernel liveupdate test liveupdate: luo_flb: introduce File-Lifecycle-Bound global state liveupdate: luo_file: Use private list list: add kunit test for private list primitives list: add primitives for private list manipulations delayacct: fix uapi timespec64 definition panic: add panic_force_cpu= parameter to redirect panic to a specific CPU netclassid: use thread_group_leader(p) in update_classid_task() RDMA/umem: don't abuse current->group_leader drm/pan*: don't abuse current->group_leader drm/amd: kill the outdated "Only the pthreads threading model is supported" checks drm/amdgpu: don't abuse current->group_leader android/binder: use same_thread_group(proc->tsk, current) in binder_mmap() android/binder: don't abuse current->group_leader kho: skip memoryless NUMA nodes when reserving scratch areas ... 2026-02-12T18:57:57+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-02-12T18:57:57+00:00 urn:sha1:541c43310e85dbf35368b43b720c6724bc8ad8ec Pull quota and isofs updates from Jan Kara: - a fix for quotactl livelock during filesystem freezing - a small improvement for isofs - a documentation fix for ext2 * tag 'fs_for_v6.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: isofs: support full length file names (255 instead of 253) quota: fix livelock between quotactl and freeze_super doc : fix a broken link in ext2.rst 2026-02-11T02:24:56+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-02-11T02:24:56+00:00 urn:sha1:dcb49710189d104d4edc07709615748dab61341b Pull x86 resource control updates from Borislav Petkov: - Extend the resctrl machinery to support telemetry monitoring on Intel (Tony Luck) The practical usage of this is being able to tell how much energy or how much work can be attributed to a group of tasks tracked under a single idenitifier. Prepend this work with proper refactoring of resctrl domains handling code. * tag 'x86_cache_for_v7.0_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits) x86,fs/resctrl: Update documentation for telemetry events x86/resctrl: Enable RDT_RESOURCE_PERF_PKG fs/resctrl: Move RMID initialization to first mount x86,fs/resctrl: Compute number of RMIDs as minimum across resources fs/resctrl: Move allocation/free of closid_num_dirty_rmid[] x86/resctrl: Handle number of RMIDs supported by RDT_RESOURCE_PERF_PKG x86/resctrl: Add energy/perf choices to rdt boot option x86,fs/resctrl: Handle domain creation/deletion for RDT_RESOURCE_PERF_PKG fs/resctrl: Refactor rmdir_mondata_subdir_allrdtgrp() fs/resctrl: Refactor mkdir_mondata_subdir() x86/resctrl: Read telemetry events x86/resctrl: Find and enable usable telemetry events x86,fs/resctrl: Add architectural event pointer x86,fs/resctrl: Fill in details of events for performance and energy GUIDs x86/resctrl: Discover hardware telemetry events fs/resctrl: Emphasize that L3 monitoring resource is required for summing domains x86,fs/resctrl: Add and initialize a resource for package scope monitoring x86,fs/resctrl: Add an architectural hook called for first mount x86,fs/resctrl: Support binary fixed point event counters x86,fs/resctrl: Handle events that can be read from any CPU ... 2026-02-10T16:31:09+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-02-10T16:31:09+00:00 urn:sha1:13d83ea9d81ddcb08b46377dcc9de6e5df1248d1 Pull crypto library updates from Eric Biggers: - Add support for verifying ML-DSA signatures. ML-DSA (Module-Lattice-Based Digital Signature Algorithm) is a recently-standardized post-quantum (quantum-resistant) signature algorithm. It was known as Dilithium pre-standardization. The first use case in the kernel will be module signing. But there are also other users of RSA and ECDSA signatures in the kernel that might want to upgrade to ML-DSA eventually. - Improve the AES library: - Make the AES key expansion and single block encryption and decryption functions use the architecture-optimized AES code. Enable these optimizations by default. - Support preparing an AES key for encryption-only, using about half as much memory as a bidirectional key. - Replace the existing two generic implementations of AES with a single one. - Simplify how Adiantum message hashing is implemented. Remove the "nhpoly1305" crypto_shash in favor of direct lib/crypto/ support for NH hashing, and enable optimizations by default. * tag 'libcrypto-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux: (53 commits) lib/crypto: mldsa: Clarify the documentation for mldsa_verify() slightly lib/crypto: aes: Drop 'volatile' from aes_sbox and aes_inv_sbox lib/crypto: aes: Remove old AES en/decryption functions lib/crypto: aesgcm: Use new AES library API lib/crypto: aescfb: Use new AES library API crypto: omap - Use new AES library API crypto: inside-secure - Use new AES library API crypto: drbg - Use new AES library API crypto: crypto4xx - Use new AES library API crypto: chelsio - Use new AES library API crypto: ccp - Use new AES library API crypto: x86/aes-gcm - Use new AES library API crypto: arm64/ghash - Use new AES library API crypto: arm/ghash - Use new AES library API staging: rtl8723bs: core: Use new AES library API net: phy: mscc: macsec: Use new AES library API chelsio: Use new AES library API Bluetooth: SMP: Use new AES library API crypto: x86/aes - Remove the superseded AES-NI crypto_cipher lib/crypto: x86/aes: Add AES-NI optimization ... 2026-02-10T04:53:18+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-02-10T04:53:18+00:00 urn:sha1:72c395024dac5e215136cbff793455f065603b06 Pull documentation updates from Jonathan Corbet: "A slightly calmer cycle for docs this time around, though there is still a fair amount going on, including: - Some signs of life on the long-moribund Japanese translation - Documentation on policies around the use of generative tools for patch submissions, and a separate document intended for consumption by generative tools - The completion of the move of the documentation tools to tools/docs. For now we're leaving a /scripts/kernel-doc symlink behind to avoid breaking scripts - Ongoing build-system work includes the incorporation of documentation in Python code, better support for documenting variables, and lots of improvements and fixes - Automatic linking of man-page references -- cat(1), for example -- to the online pages in the HTML build ...and the usual array of typo fixes and such" * tag 'docs-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux: (107 commits) doc: development-process: add notice on testing tools: sphinx-build-wrapper: improve its help message docs: sphinx-build-wrapper: allow -v override -q docs: kdoc: Fix pdfdocs build for tools docs: ja_JP: process: translate 'Obtain a current source tree' docs: fix 're-use' -> 'reuse' in documentation docs: ioctl-number: fix a typo in ioctl-number.rst docs: filesystems: ensure proc pid substitutable is complete docs: automarkup.py: Skip common English words as C identifiers Documentation: use a source-read extension for the index link boilerplate docs: parse_features: make documentation more consistent docs: add parse_features module documentation docs: jobserver: do some documentation improvements docs: add jobserver module documentation docs: kabi: helpers: add documentation for each "enum" value docs: kabi: helpers: add helper for debug bits 7 and 8 docs: kabi: system_symbols: end docstring phrases with a dot docs: python: abi_regex: do some improvements at documentation docs: python: abi_parser: do some improvements at documentation docs: add kabi modules documentation ... 2026-02-10T00:58:28+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-02-10T00:58:28+00:00 urn:sha1:26c9342bb761e463774a64fb6210b4f95f5bc035 Pull vfs 'struct filename' updates from Al Viro: "[Mostly] sanitize struct filename handling" * tag 'pull-filename' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (68 commits) sysfs(2): fs_index() argument is _not_ a pathname alpha: switch osf_mount() to strndup_user() ksmbd: use CLASS(filename_kernel) mqueue: switch to CLASS(filename) user_statfs(): switch to CLASS(filename) statx: switch to CLASS(filename_maybe_null) quotactl_block(): switch to CLASS(filename) chroot(2): switch to CLASS(filename) move_mount(2): switch to CLASS(filename_maybe_null) namei.c: switch user pathname imports to CLASS(filename{,_flags}) namei.c: convert getname_kernel() callers to CLASS(filename_kernel) do_f{chmod,chown,access}at(): use CLASS(filename_uflags) do_readlinkat(): switch to CLASS(filename_flags) do_sys_truncate(): switch to CLASS(filename) do_utimes_path(): switch to CLASS(filename_uflags) chdir(2): unspaghettify a bit... do_fchownat(): unspaghettify a bit... fspick(2): use CLASS(filename_flags) name_to_handle_at(): use CLASS(filename_uflags) vfs_open_tree(): use CLASS(filename_uflags) ...