kernel/git/stable/linux-stable.git/fs/ocfs2/super.c, branch master

ocfs2: don't reset s_dev on dismount

2026-06-29T08:31:52+00:00

ocfs2_dismount_volume() has reset sb->s_dev to zero since the original merge in ccd979bdbce9 ("[PATCH] OCFS2: The Second Oracle Cluster Filesystem") as part of scrubbing the super_block. Nothing reads the field afterwards: all ocfs2-internal uses are mount-time log and trace prints, and dev_t-keyed superblock lookups skip a dying superblock anyway - s_root is gone before ->put_super runs and super_lock() refuses SB_DYING superblocks. The upcoming device-to-superblock table registers every superblock under its s_dev. Drop the reset instead of leaving a superblock around whose s_dev contradicts its registration. Link: https://patch.msgid.link/20260616-work-super-bdev_holder_global-v2-6-7df6b864028e@kernel.org Signed-off-by: Christian Brauner (Amutable)

Merge tag 'mm-nonmm-stable-2026-06-21-10-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-06-21T20:20:19+00:00

Pull non-MM updates from Andrew Morton: - "taskstats: fix TGID dead-thread stat retention" (Yiyang Chen) Fix a taskstats TGID aggregation bug where fields added in the TGID query path were not preserved after thread exit, and adds a kselftest covering the regression. - "lib/tests: string_helpers: Slight improvements" (Andy Shevchenko) Improve lib/tests/string_helpers_kunit.c a little - "lib/base64: decode fixes" (Josh Law) Address minor issues in lib/base64.c - "selftests/filelock: Make output more kselftestish" (Mark Brown) Make the output from the ofdlocks test a bit easier for tooling to work with. Also ignore the generated file - "uaccess: unify inline vs outline copy_{from,to}_user() selection" (Yury Norov) Simplify the usercopy code by removing the selectability of inlining copy_{from,to}_user(). - "ocfs2: validate inline xattr header consumers" (ZhengYuan Huang) Fix a number of possible issues in the ocfs2 xattr code - "lib and lib/cmdline enhancements" (Dmitry Antipov) Provide additional robustness checking in the cmdline handling code and its in-kernel testing and selftests - "cleanup the RAID6 P/Q library" (Christoph Hellwig) Clean up the RAID6 P/Q library to match the recent updates to the RAID 5 XOR library and other CRC/crypto libraries - "ocfs2: harden inode validators against forged metadata" (Michael Bommarito) Add three structural checks to OCFS2 dinode validation so malformed on-disk fields are rejected before ocfs2_populate_inode() copies them into the in-core inode - "lib/raid: replace __get_free_pages() call with kmalloc()" (Mike Rapoport) Clean up the lib/raid code by using kmalloc() in more places * tag 'mm-nonmm-stable-2026-06-21-10-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (108 commits) ocfs2: fix circular locking dependency in ocfs2_dio_end_io_write ocfs2: fix NULL h_transaction deref in ocfs2_assure_trans_credits lib: interval_tree_test: validate benchmark parameters ocfs2: avoid moving extents to occupied clusters treewide: fix transposed "sign" typos and update spelling.txt ocfs2: fix UBSAN array-index-out-of-bounds in ocfs2_sum_rightmost_rec fat: reject BPB volumes whose data area starts beyond total sectors selftests/uevent: increase __UEVENT_BUFFER_SIZE to avoid ENOBUFS on busy systems lib/test_firmware: allocate the configured into_buf size fs: efs: remove unneeded debug prints checkpatch: cuppress warnings when Reported-by: is followed by Link: MAINTAINERS: add Alexander as a kcov reviewer mailmap: update Alexander Sverdlin's Email addresses fs: fat: inode: replace sprintf() with scnprintf() ocfs2: fix out-of-bounds write in ocfs2_remove_refcount_extent ocfs2: fix race between ocfs2_control_install_private() and ocfs2_control_release() ocfs2/dlm: require a ref for locking_state debugfs open ocfs2: reject FITRIM ranges shorter than a cluster ocfs2: validate fast symlink target during inode read ocfs2: add journal NULL check in ocfs2_checkpoint_inode() ...

ocfs2: kill osb->system_file_mutex lock

2026-05-29T04:24:57+00:00

Commit 43b10a20372d ("ocfs2: avoid system inode ref confusion by adding mutex lock") tried to avoid a refcount leak caused by allowing multiple threads to call igrab(inode). But addition of osb->system_file_mutex made locking dependency complicated and is causing lockdep to warn about possibility of AB-BA deadlock. Since _ocfs2_get_system_file_inode() returns the same inode for the same input arguments, we don't need to serialize _ocfs2_get_system_file_inode(). What we need to make sure is that igrab(inode) is called for only once(). Therefore, replace osb->system_file_mutex with cmpxchg()-based locking. Link: https://lore.kernel.org/fea8d1fd-afb0-4302-a560-c202e2ef7afd@I-love.SAKURA.ne.jp Fixes: 43b10a20372d ("ocfs2: avoid system inode ref confusion by adding mutex lock") Signed-off-by: Tetsuo Handa Reviewed-by: Heming Zhao Acked-by: Joseph Qi Cc: Mark Fasheh Cc: Joel Becker Cc: Junxiao Bi Cc: Changwei Ge Cc: Jun Piao Signed-off-by: Andrew Morton

fs: RCU-ify filesystems list

2026-05-11T21:13:01+00:00

The drivers list was protected by an rwlock; every mount, every open of /proc/filesystems and the legacy sysfs(2) syscall walked a hand-rolled singly-linked list under it. /proc/filesystems is especially hot because libselinux causes programs as mundane as mkdir, ls and sed to open and read it on every invocation. Convert the list to an RCU-protected hlist and switch the writer side to a plain spinlock. Writers keep their existing non-sleeping section while readers walk under rcu_read_lock() with no lock traffic: - register_filesystem()/unregister_filesystem() take file_systems_lock, publish via hlist_{add_tail,del_init}_rcu() and invalidate the cached /proc/filesystems string. unregister_filesystem() keeps its synchronize_rcu() after dropping the lock so in-flight readers are drained before the module (and its embedded file_system_type) can go away. - __get_fs_type(), list_bdev_fs_names() and the fs_index()/fs_name()/fs_maxindex() helpers walk the list under rcu_read_lock(). fs_name() continues to drop the read-side lock after try_module_get() and accesses ->name outside the RCU section; the module reference pins the embedded file_system_type across the boundary. struct file_system_type::next becomes struct hlist_node list; no in-tree caller references the old ->next field outside fs/filesystems.c. Link: https://patch.msgid.link/20260425220844.1763933-3-mjguzik@gmail.com Signed-off-by: Christian Brauner

ocfs2: use get_random_u32() where appropriate

2026-04-15T09:15:03+00:00

Use the typed random integer helpers instead of get_random_bytes() when filling a single integer variable. The helpers return the value directly, require no pointer or size argument, and better express intent. Link: https://lkml.kernel.org/r/20260405154720.4732-1-devnexen@gmail.com Signed-off-by: David Carlier Cc: Mark Fasheh Cc: Joel Becker Cc: Junxiao Bi Cc: Changwei Ge Cc: Jun Piao Cc: Heming Zhao Signed-off-by: Andrew Morton

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

Merge tag 'mm-nonmm-stable-2025-12-11-11-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-12-13T08:55:12+00:00

Pull misc updates from Andrew Morton: "There are no significant series in this small merge. Please see the individual changelogs for details" [ Editor's note: it's mainly ocfs2 and a couple of random fixes ] * tag 'mm-nonmm-stable-2025-12-11-11-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: mm: memfd_luo: add CONFIG_SHMEM dependency mm: shmem: avoid build warning for CONFIG_SHMEM=n ocfs2: fix memory leak in ocfs2_merge_rec_left() ocfs2: invalidate inode if i_mode is zero after block read ocfs2: avoid -Wflex-array-member-not-at-end warning ocfs2: convert remaining read-only checks to ocfs2_emergency_state ocfs2: add ocfs2_emergency_state helper and apply to setattr checkpatch: add uninitialized pointer with __free attribute check args: fix documentation to reflect the correct numbers ocfs2: fix kernel BUG in ocfs2_find_victim_chain liveupdate: luo_core: fix redundant bound check in luo_ioctl() ocfs2: validate inline xattr size and entry count in ocfs2_xattr_ibody_list fs/fat: remove unnecessary wrapper fat_max_cache() ocfs2: replace deprecated strcpy with strscpy ocfs2: check tl_used after reading it from trancate log inode liveupdate: luo_file: don't use invalid list iterator

ocfs2: convert remaining read-only checks to ocfs2_emergency_state

2025-12-11T00:07:43+00:00

Now that the centralized `ocfs2_emergency_state()` helper is available, refactor remaining filesystem-wide checks for `ocfs2_is_soft_readonly` and `ocfs2_is_hard_readonly` to use this new function. To ensure strict consistency with the previous behavior and guarantee no functional changes, the call sites continue to explicitly return -EROFS when the emergency state is detected. This standardizes the check logic while preserving the existing error handling flow. Link: https://lkml.kernel.org/r/3421641b54ad6b6e4ffca052351b518eacc1bd08.1764728893.git.eraykrdg1@gmail.com Co-developed-by: Albin Babu Varghese Signed-off-by: Albin Babu Varghese Signed-off-by: Ahmet Eray Karadag Reviewed-by: Heming Zhao Reviewed-by: Joseph Qi Cc: Changwei Ge Cc: David Hunter Cc: Joel Becker Cc: Jun Piao Cc: Junxiao Bi Cc: Mark Fasheh Signed-off-by: Andrew Morton

ocfs2: retire ocfs2_drop_inode() and I_WILL_FREE usage

2025-10-20T18:22:25+00:00

This postpones the writeout to ocfs2_evict_inode(), which I'm told is fine (tm). The intent is to retire the I_WILL_FREE flag. Reviewed-by: Jan Kara Signed-off-by: Mateusz Guzik Reviewed-by: Joel Becker Reviewed-by: Mark Tinguely Signed-off-by: Christian Brauner