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linux/fs
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Sungjong Seo c052f775ee exfat: fix potential deadlock on __exfat_get_dentry_set 
commit 89fc548767 upstream.

When accessing a file with more entries than ES_MAX_ENTRY_NUM, the bh-array
is allocated in __exfat_get_entry_set. The problem is that the bh-array is
allocated with GFP_KERNEL. It does not make sense. In the following cases,
a deadlock for sbi->s_lock between the two processes may occur.

       CPU0                CPU1
       ----                ----
  kswapd
   balance_pgdat
    lock(fs_reclaim)
                      exfat_iterate
                       lock(&sbi->s_lock)
                       exfat_readdir
                        exfat_get_uniname_from_ext_entry
                         exfat_get_dentry_set
                          __exfat_get_dentry_set
                           kmalloc_array
                            ...
                            lock(fs_reclaim)
    ...
    evict
     exfat_evict_inode
      lock(&sbi->s_lock)

To fix this, let's allocate bh-array with GFP_NOFS.

Fixes: a3ff29a95f ("exfat: support dynamic allocate bh for exfat_entry_set_cache")
Cc: stable@vger.kernel.org # v6.2+
Reported-by: syzbot+412a392a2cd4a65e71db@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/lkml/000000000000fef47e0618c0327f@google.com
Signed-off-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
[Sherry: The problematic commit was backported to 5.15.y and 5.10.y, thus backport this fix]
Signed-off-by: Sherry Yang <sherry.yang@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2024-12-19 18:07:18 +01:00
..
9p 9p: add missing locking around taking dentry fid list 2024-10-17 15:11:47 +02:00
adfs mm: require ->set_page_dirty to be explicitly wired up 2021-06-29 10:53:48 -07:00
affs affs: initialize fsdata in affs_truncate() 2023-02-01 08:27:06 +01:00
afs afs: fix __afs_break_callback() / afs_drop_open_mmap() race 2024-09-04 13:23:23 +02:00
autofs autofs: fix memory leak of waitqueues in autofs_catatonic_mode 2023-09-23 11:09:54 +02:00
befs isystem: ship and use stdarg.h 2021-08-19 09:02:55 +09:00
bfs mm: require ->set_page_dirty to be explicitly wired up 2021-06-29 10:53:48 -07:00
btrfs btrfs: fix missing snapshot drew unlock when root is dead during swap activation 2024-12-14 19:51:43 +01:00
cachefiles cachefiles: fix memory leak in cachefiles_add_cache() 2024-03-06 14:38:50 +00:00
ceph ceph: remove the incorrect Fw reference check when dirtying pages 2024-10-17 15:11:19 +02:00
cifs cifs: Fix buffer overflow when parsing NFS reparse points 2024-12-14 19:50:41 +01:00
coda coda: Avoid partial allocation of sig_inputArgs 2023-03-10 09:39:50 +01:00
configfs configfs: fix possible memory leak in configfs_create_dir() 2022-12-31 13:14:15 +01:00
cramfs cramfs: use %pD instead of messing with file_dentry()->d_name 2021-01-05 23:02:47 -05:00
crypto fscrypt: fix keyring memory leak on mount failure 2022-11-10 18:15:37 +01:00
debugfs debugfs: fix automount d_fsdata usage 2024-01-25 14:52:27 -08:00
devpts fsnotify: fix fsnotify hooks in pseudo filesystems 2022-02-01 17:27:01 +01:00
dlm dlm: fix plock lookup when using multiple lockspaces 2023-09-19 12:22:52 +02:00
ecryptfs ecryptfs: Fix buffer size for tag 66 packet 2024-06-16 13:39:16 +02:00
efivarfs efivarfs: force RO when remounting if SetVariable is not supported 2024-01-25 14:52:33 -08:00
efs [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
erofs erofs: apply proper VMA alignment for memory mapped files on THP 2024-03-15 10:48:15 -04:00
exfat exfat: fix potential deadlock on __exfat_get_dentry_set 2024-12-19 18:07:18 +01:00
exportfs exportfs: use pr_debug for unreachable debug statements 2024-04-10 16:19:21 +02:00
ext2 ext2: Verify bitmap and itable block numbers before using them 2024-08-19 05:45:12 +02:00
ext4 ext4: fix FS_IOC_GETFSMAP handling 2024-12-14 19:51:12 +01:00
f2fs f2fs: fix f2fs_bug_on when uninstalling filesystem call f2fs_evict_inode. 2024-12-14 19:51:41 +01:00
fat fat: fix uninitialized variable 2024-10-22 15:40:40 +02:00
freevxfs fs: Fill in max and min timestamps in superblock 2019-08-30 07:27:17 -07:00
fscache fscache: Remove an unused static variable 2021-10-04 22:13:12 +01:00
fuse fuse: use unsigned type for getxattr/listxattr size truncation 2024-09-12 11:07:44 +02:00
gfs2 gfs2: setattr_chown: Add missing initialization 2024-09-04 13:23:22 +02:00
hfs hfs: fix to initialize fields of hfs_inode_info after hfs_alloc_inode() 2024-08-19 05:45:12 +02:00
hfsplus hfsplus: don't query the device logical block size multiple times 2024-12-14 19:50:43 +01:00
hostfs hostfs: support splice_write 2021-08-26 22:28:02 +02:00
hpfs hpfs: use iomap_fiemap to implement ->fiemap 2021-07-27 11:00:36 +02:00
hugetlbfs fs,hugetlb: fix NULL pointer dereference in hugetlbs_fill_super 2024-03-06 14:38:50 +00:00
iomap iomap: update ki_pos a little later in iomap_dio_complete 2023-12-08 08:48:05 +01:00
isofs isofs: handle CDs with bad root inode but good Joliet root directory 2024-04-13 13:01:44 +02:00
jbd2 ext4: fix fast commit inode enqueueing during a full journal commit 2024-10-17 15:11:38 +02:00
jffs2 jffs2: Fix rtime decompressor 2024-12-14 19:51:44 +01:00
jfs jfs: add a check to prevent array-index-out-of-bounds in dbAdjTree 2024-12-14 19:51:39 +01:00
kernfs fs/kernfs/dir: obey S_ISGID 2024-02-23 08:54:51 +01:00
ksmbd ksmbd: fix slab-use-after-free in smb3_preauth_hash_rsp 2024-12-14 19:51:11 +01:00
lockd nfsd: stop setting ->pg_stats for unused stats 2024-09-04 13:23:30 +02:00
minix minix: fix bug when opening a file with O_DIRECT 2022-04-13 20:59:10 +02:00
netfs netfs: fix parameter of cleanup() 2021-12-29 12:28:59 +01:00
nfs nfs: ignore SB_RDONLY when mounting nfs 2024-12-14 19:51:21 +01:00
nfs_common nfs: Fix kerneldoc warning shown up by W=1 2021-10-04 22:02:17 +01:00
nfsd nfsd: fix nfs4_openowner leak when concurrent nfsd4_open occur 2024-12-14 19:51:24 +01:00
nilfs2 nilfs2: fix potential out-of-bounds memory access in nilfs_find_entry() 2024-12-14 19:51:33 +01:00
nls fs/nls: make load_nls() take a const parameter 2023-09-19 12:22:27 +02:00
notify fsnotify: fix sending inotify event with unexpected filename 2024-12-14 19:51:13 +01:00
ntfs ntfs: check overflow when iterating ATTR_RECORDs 2022-11-26 09:24:52 +01:00
ntfs3 fs/ntfs3: Additional check in ni_clear() 2024-11-08 16:25:53 +01:00
ocfs2 ocfs2: Revert "ocfs2: fix the la space leak when unmounting an ocfs2 volume" 2024-12-14 19:51:45 +01:00
omfs mm: require ->set_page_dirty to be explicitly wired up 2021-06-29 10:53:48 -07:00
openpromfs openpromfs: finish conversion to the new mount API 2024-06-16 13:39:16 +02:00
orangefs orangefs: fix out-of-bounds fsid access 2024-07-18 13:07:29 +02:00
overlayfs ovl: properly handle large files in ovl_security_fileattr 2024-12-14 19:51:23 +01:00
proc proc/softirqs: replace seq_printf with seq_put_decimal_ull_width 2024-12-14 19:50:41 +01:00
pstore pstore/zone: Add a null pointer check to the psz_kmsg_read 2024-04-13 13:01:43 +02:00
qnx4 qnx4: work around gcc false positive warning bug 2021-09-21 08:36:48 -07:00
qnx6 [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
quota quota: flush quota_release_work upon quota writeback 2024-12-14 19:51:22 +01:00
ramfs shmem: use ramfs_kill_sb() for kill_sb method of ramfs-based tmpfs 2023-07-23 13:47:33 +02:00
reiserfs reiserfs: Check the return value from __getblk() 2023-09-19 12:22:30 +02:00
romfs Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-24 12:26:05 -07:00
smbfs_common cifs: Fix crash on unload of cifs_arc4.ko 2021-12-14 10:57:12 +01:00
squashfs Squashfs: sanity check symbolic link size 2024-09-12 11:07:50 +02:00
sysfs fs: sysfs: Fix reference leak in sysfs_break_active_protection() 2024-04-27 17:05:28 +02:00
sysv sysv: don't call sb_bread() with pointers_lock held 2024-04-13 13:01:44 +02:00
tracefs tracefs: Add missing lockdown check to tracefs_create_dir() 2023-09-23 11:10:02 +02:00
ubifs ubifs: authentication: Fix use-after-free in ubifs_tnc_end_commit 2024-12-14 19:51:20 +01:00
udf udf: Avoid directory type conversion failure due to ENOMEM 2024-11-17 15:06:26 +01:00
ufs isystem: ship and use stdarg.h 2021-08-19 09:02:55 +09:00
unicode Revert "unicode: Don't special case ignorable code points" 2024-12-14 19:51:44 +01:00
vboxsf vboxsf: Avoid an spurious warning if load_nls_xxx() fails 2024-04-10 16:19:38 +02:00
verity fsverity: skip PKCS#7 parser when keyring is empty 2023-09-19 12:22:52 +02:00
xfs xfs: fix scrub tracepoints when inode-rooted btrees are involved 2024-12-19 18:07:18 +01:00
zonefs zonefs: Improve error handling 2024-03-01 13:21:43 +01:00
aio.c fs/aio: Check IOCB_AIO_RW before the struct aio_kiocb conversion 2024-04-10 16:18:46 +02:00
anon_inodes.c fs: anon_inodes: rephrase to appropriate kernel-doc 2021-01-15 12:17:25 -05:00
attr.c attr: block mode changes of symlinks 2023-09-23 11:10:01 +02:00
bad_inode.c vfs: add rcu argument to ->get_acl() callback 2021-08-18 22:08:24 +02:00
binfmt_aout.c binfmt: a.out: Fix bogus semicolon 2021-09-05 10:15:05 -07:00
binfmt_elf.c fs/binfmt_elf: Fix memory leak in load_elf_binary() 2022-11-03 23:59:12 +09:00
binfmt_elf_fdpic.c fs: binfmt_elf_efpic: don't use missing interpreter's properties 2024-09-04 13:23:24 +02:00
binfmt_flat.c binfmt_flat: Fix corruption when not offsetting data start 2024-08-19 05:45:52 +02:00
binfmt_misc.c binfmt_misc: cleanup on filesystem umount 2024-09-04 13:23:22 +02:00
binfmt_script.c Merge branch 'akpm' (patches from Andrew) 2020-06-04 19:18:29 -07:00
buffer.c mm: fs: initialize fsdata passed to write_begin/write_end interface 2022-11-26 09:24:51 +01:00
char_dev.c chardev: fix error handling in cdev_device_add() 2022-12-31 13:14:30 +01:00
compat_binfmt_elf.c get rid of COMPAT_ELF_EXEC_PAGESIZE 2021-01-06 08:42:51 -05:00
coredump.c coredump: Use the vma snapshot in fill_files_note 2022-04-08 14:24:18 +02:00
d_path.c d_path: make 'prepend()' fill up the buffer exactly on overflow 2021-09-02 10:07:29 -07:00
dax.c fsdax: Fix infinite loop in dax_iomap_rw() 2022-09-28 11:11:56 +02:00
dcache.c fs: better handle deep ancestor chains in is_subdir() 2024-07-27 10:46:13 +02:00
direct-io.c fs: direct-io: fix missing sdio->boundary 2021-04-09 14:54:23 -07:00
drop_caches.c fs: drop_caches: fix skipping over shadow cache inodes 2021-09-03 09:58:10 -07:00
eventfd.c eventfd: prevent underflow for eventfd semaphores 2023-09-19 12:22:30 +02:00
eventpoll.c epoll: annotate racy check 2024-12-14 19:51:34 +01:00
exec.c exec: don't WARN for racy path_noexec check 2024-11-01 01:52:35 +01:00
fcntl.c fs: Fix file_set_fowner LSM hook inconsistencies 2024-10-17 15:11:15 +02:00
fhandle.c do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak 2024-03-26 18:21:14 -04:00
file.c close_range(): fix the logics in descriptor table trimming 2024-10-17 15:11:42 +02:00
file_table.c locks: fix TOCTOU race when granting write lease 2022-10-26 12:34:58 +02:00
filesystems.c fs: simplify get_filesystem_list / get_all_fs_names 2021-08-23 01:25:40 -04:00
fs-writeback.c writeback, cgroup: switch inodes with dirty timestamps to release dying cgwbs 2023-11-20 11:08:13 +01:00
fs_context.c fs: avoid empty option when generating legacy mount string 2023-07-23 13:47:34 +02:00
fs_parser.c namei: Standardize callers of filename_lookup() 2021-09-07 16:07:47 -04:00
fs_pin.c switch the remnants of releasing the mountpoint away from fs_pin 2019-07-16 22:52:37 -04:00
fs_struct.c vfs: Use sequence counter with associated spinlock 2020-07-29 16:14:27 +02:00
fs_types.c fs: common implementation of file type 2019-01-21 17:48:13 +01:00
fsopen.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
init.c init: handle idmapped mounts 2021-01-24 14:27:19 +01:00
inode.c vfs: fix race between evice_inodes() and find_inode()&iput() 2024-10-17 15:11:15 +02:00
internal.h nfs: use vfs setgid helper 2023-08-30 16:18:19 +02:00
ioctl.c lsm: new security_file_ioctl_compat() hook 2024-02-23 08:54:25 +01:00
Kconfig NFSD: Remove CONFIG_NFSD_V3 2024-04-10 16:19:01 +02:00
Kconfig.binfmt binfmt: remove support for em86 (alpha only) 2021-07-25 22:33:03 -07:00
kernel_read_file.c vfs: check fd has read access in kernel_read_file_from_fd() 2021-10-18 20:22:03 -10:00
libfs.c libfs: add DEFINE_SIMPLE_ATTRIBUTE_SIGNED for signed value 2022-12-31 13:14:03 +01:00
locks.c filelock: Fix fcntl/close race recovery compat path 2024-07-27 10:46:17 +02:00
Makefile io_uring: move to separate directory 2022-12-14 11:37:31 +01:00
mbcache.c mbcache: Avoid nesting of cache->c_list_lock under bit locks 2023-01-12 11:59:20 +01:00
mount.h mount: make {lock,unlock}_mount_hash() static 2021-01-24 14:29:34 +01:00
mpage.c block: rename BIO_MAX_PAGES to BIO_MAX_VECS 2021-03-11 07:47:48 -07:00
namei.c rename(): fix the locking of subdirectories 2024-02-23 08:54:26 +01:00
namespace.c mount: handle OOM on mnt_warn_timestamp_expiry 2024-10-17 15:10:44 +02:00
no-block.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
nsfs.c nsproxy: attach to namespaces via pidfds 2020-05-13 11:41:22 +02:00
open.c openat2: explicitly return -E2BIG for (usize > PAGE_SIZE) 2024-11-01 01:52:37 +01:00
pipe.c fs/pipe: Fix lockdep false-positive in watchqueue pipe_write() 2024-04-10 16:19:42 +02:00
pnode.c pnode: terminate at peers of source 2023-01-12 11:58:47 +01:00
pnode.h mount: fix mounting of detached mounts onto targets that reside on shared mounts 2021-03-08 15:18:43 +01:00
posix_acl.c fs: fix acl translation 2022-07-02 16:41:17 +02:00
proc_namespace.c fs: add is_idmapped_mnt() helper 2022-07-02 16:41:14 +02:00
read_write.c vfs: fix copy_file_range() averts filesystem freeze protection 2022-12-19 12:36:39 +01:00
readdir.c readdir: make sure to verify directory entry for legacy interfaces too 2021-04-17 11:39:49 -07:00
remap_range.c fs/remap: constrain dedupe of EOF blocks 2022-07-21 21:24:14 +02:00
select.c fs/select: rework stack allocation hack for clang 2024-03-26 18:21:15 -04:00
seq_file.c rxrpc: Fix locking issue 2022-07-12 16:35:08 +02:00
signalfd.c signalfd: use wake_up_pollfree() 2021-12-14 10:57:15 +01:00
splice.c Revert "fs: check FMODE_LSEEK to control internal pipe splicing" 2022-10-26 12:34:17 +02:00
stack.c sched/rt, fs: Use CONFIG_PREEMPTION 2019-12-08 14:37:36 +01:00
stat.c stat: fix inconsistency between struct stat and struct compat_stat 2022-04-27 14:38:57 +02:00
statfs.c statfs: enforce statfs[64] structure initialization 2023-05-24 17:36:54 +01:00
super.c fs: explicitly unregister per-superblock BDIs 2024-10-17 15:10:43 +02:00
sync.c vfs: make sync_filesystem return errors from ->sync_fs 2022-04-27 14:38:50 +02:00
timerfd.c timerfd: Provide timerfd_resume() 2021-08-10 17:57:22 +02:00
userfaultfd.c Fix userfaultfd_api to return EINVAL as expected 2024-07-18 13:07:42 +02:00
utimes.c utimes: handle idmapped mounts 2021-01-24 14:27:18 +01:00
xattr.c fs: don't audit the capability check in simple_xattr_list() 2022-12-31 13:14:01 +01:00