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Al ViroandGreg Kroah-Hartman 00f0dd1a01 do_umount(): add missing barrier before refcount checks in sync case 
[ Upstream commit 65781e19dc ]

do_umount() analogue of the race fixed in 119e1ef80e "fix
__legitimize_mnt()/mntput() race".  Here we want to make sure that
if __legitimize_mnt() doesn't notice our lock_mount_hash(), we will
notice their refcount increment.  Harder to hit than mntput_no_expire()
one, fortunately, and consequences are milder (sync umount acting
like umount -l on a rare race with RCU pathwalk hitting at just the
wrong time instead of use-after-free galore mntput_no_expire()
counterpart used to be hit).  Still a bug...

Fixes: 48a066e72d ("RCU'd vfsmounts")
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-05-18 08:24:10 +02:00
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9p
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adfs
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affs
affs: don't write overlarge OFS data block size fields
2025-04-10 14:37:37 +02:00
afs
afs: Fix the server_list to unuse a displaced server rather than putting it
2025-03-07 16:45:38 +01:00
autofs
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befs
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bfs
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btrfs
btrfs: fix COW handling in run_delalloc_nocow()
2025-05-09 09:43:49 +02:00
cachefiles
cachefiles: Fix NULL pointer dereference in object->file
2025-02-17 09:40:42 +01:00
ceph
ceph: Fix incorrect flush end position calculation
2025-05-02 07:50:42 +02:00
coda
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configfs
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cramfs
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crypto
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debugfs
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devpts
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dlm
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ecryptfs
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efivarfs
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efs
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erofs
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exfat
exfat: fix the infinite loop in exfat_find_last_cluster()
2025-04-10 14:37:35 +02:00
exportfs
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ext2
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ext4
ext4: goto right label 'out_mmap_sem' in ext4_setattr()
2025-05-02 07:51:03 +02:00
f2fs
f2fs: fix to avoid atomicity corruption of atomic file
2025-04-25 10:45:27 +02:00
fat
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freevxfs
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fscache
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fuse
virtiofs: add filesystem context source name check
2025-04-25 10:45:50 +02:00
gfs2
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hfs
hfs/hfsplus: fix slab-out-of-bounds in hfs_bnode_read_key
2025-04-25 10:45:47 +02:00
hfsplus
hfs/hfsplus: fix slab-out-of-bounds in hfs_bnode_read_key
2025-04-25 10:45:47 +02:00
hostfs
um: hostfs: avoid issues on inode number reuse by host
2025-04-10 14:37:34 +02:00
hpfs
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hugetlbfs
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iomap
iomap: skip unnecessary ifs_block_is_uptodate check
2025-05-02 07:51:01 +02:00
isofs
isofs: Prevent the use of too small fid
2025-04-25 10:45:48 +02:00
jbd2
jbd2: remove wrong sb->s_sequence check
2025-04-25 10:45:28 +02:00
jffs2
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jfs
jfs: add sanity check for agwidth in dbMount
2025-04-25 10:45:15 +02:00
kernfs
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lockd
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minix
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netfs
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nfs
nfs: add missing selections of CONFIG_CRC32
2025-04-25 10:45:46 +02:00
nfs_common
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nfsd
nfsd: decrease sc_count directly if fail to queue dl_recall
2025-04-25 10:45:46 +02:00
nilfs2
nilfs2: handle errors that nilfs_prepare_chunk() may return
2025-02-27 04:10:54 -08:00
nls
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notify
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ntfs
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ntfs3
fs/ntfs3: Fix WARNING in ntfs_extend_initialized_size
2025-05-02 07:50:54 +02:00
ocfs2
ocfs2: stop quota recovery before disabling quotas
2025-05-18 08:24:08 +02:00
omfs
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openpromfs
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orangefs
orangefs: fix a oob in orangefs_debug_write
2025-02-21 13:57:12 +01:00
overlayfs
ovl: don't allow datadir only
2025-04-25 10:45:48 +02:00
proc
fs/procfs: fix the comment above proc_pid_wchan()
2025-04-10 14:37:35 +02:00
pstore
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qnx4
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qnx6
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quota
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ramfs
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reiserfs
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romfs
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smb
smb: client: Avoid race in open_cached_dir with lease breaks
2025-05-18 08:24:08 +02:00
squashfs
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sysfs
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sysv
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tracefs
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ubifs
ubifs: skip dumping tnc tree when zroot is null
2025-02-08 09:52:28 +01:00
udf
udf: Fix inode_getblk() return value
2025-04-25 10:45:27 +02:00
ufs
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unicode
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vboxsf
vboxsf: fix building with GCC 15
2025-03-22 12:50:41 -07:00
verity
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xfs
xfs: don't over-report free space or inodes in statvfs
2025-02-27 04:10:44 -08:00
zonefs
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aio.c
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anon_inodes.c
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attr.c
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bad_inode.c
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binfmt_elf_fdpic.c
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binfmt_elf_test.c
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binfmt_elf.c
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binfmt_flat.c
binfmt_flat: Fix integer overflow bug on 32 bit systems
2025-02-17 09:40:16 +01:00
binfmt_misc.c
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binfmt_script.c
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buffer.c
buffer: make folio_create_empty_buffers() return a buffer_head
2025-02-08 09:52:26 +01:00
char_dev.c
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compat_binfmt_elf.c
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coredump.c
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d_path.c
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dax.c
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dcache.c
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direct-io.c
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drop_caches.c
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eventfd.c
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eventpoll.c
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exec.c
exec: fix the racy usage of fs_struct->in_exec
2025-04-10 14:37:44 +02:00
fcntl.c
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fhandle.c
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file_table.c
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file.c
fs: consistently deref the files table with rcu_dereference_raw()
2025-04-25 10:45:10 +02:00
filesystems.c
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fs_context.c
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fs_parser.c
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fs_pin.c
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fs_struct.c
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fs_types.c
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fs-writeback.c
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fsopen.c
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init.c
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inode.c
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internal.h
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ioctl.c
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Kconfig
nfs: add missing selections of CONFIG_CRC32
2025-04-25 10:45:46 +02:00
Kconfig.binfmt
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kernel_read_file.c
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libfs.c
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locks.c
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Makefile
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mbcache.c
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mnt_idmapping.c
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mount.h
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mpage.c
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namei.c
fuse: don't truncate cached, mutated symlink
2025-03-22 12:50:44 -07:00
namespace.c
do_umount(): add missing barrier before refcount checks in sync case
2025-05-18 08:24:10 +02:00
nsfs.c
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open.c
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pipe.c
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pnode.c
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pnode.h
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posix_acl.c
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proc_namespace.c
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read_write.c
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readdir.c
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remap_range.c
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select.c
hrtimer: Use and report correct timerslack values for realtime tasks
2025-03-22 12:50:37 -07:00
seq_file.c
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signalfd.c
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splice.c
splice: remove duplicate noinline from pipe_clear_nowait
2025-05-02 07:50:45 +02:00
stack.c
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stat.c
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statfs.c
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super.c
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sync.c
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sysctls.c
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timerfd.c
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userfaultfd.c
mm/userfaultfd: fix release hang over concurrent GUP
2025-04-25 10:45:31 +02:00
utimes.c
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xattr.c
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