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linux/fs/ext4
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Jan Kara 0a46ef2347 ext4: do not create EA inode under buffer lock 
ext4_xattr_set_entry() creates new EA inodes while holding buffer lock
on the external xattr block. This is problematic as it nests all the
allocation locking (which acquires locks on other buffers) under the
buffer lock. This can even deadlock when the filesystem is corrupted and
e.g. quota file is setup to contain xattr block as data block. Move the
allocation of EA inode out of ext4_xattr_set_entry() into the callers.

Reported-by: syzbot+a43d4f48b8397d0e41a9@syzkaller.appspotmail.com
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20240321162657.27420-2-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2024-05-03 00:02:24 -04:00
..
.kunitconfig
acl.c ext4: convert to ctime accessor functions 2023-07-24 10:29:54 +02:00
acl.h Revert "ext4: apply umask if ACL support is disabled" 2024-05-02 18:25:39 -04:00
balloc.c ext4: add some kunit stub for mballoc kunit test 2023-10-05 22:32:16 -04:00
bitmap.c
block_validity.c ext4: add correct group descriptors and reserved GDT blocks to system zone 2023-08-27 11:27:12 -04:00
crypto.c fscrypt: support crypto data unit size less than filesystem block size 2023-09-25 22:34:33 -07:00
dir.c
ext4.h \n 2024-03-13 14:30:58 -07:00
ext4_extents.h
ext4_jbd2.c ext4: move ext4_check_bdev_write_error() into nojournal mode 2024-01-04 23:42:21 -05:00
ext4_jbd2.h
extents.c ext4: set the type of max_zeroout to unsigned int to avoid overflow 2024-05-02 23:48:31 -04:00
extents_status.c Many singleton patches against the MM code. The patch series which are 2023-11-02 19:38:47 -10:00
extents_status.h ext4: make ext4_es_insert_extent() return void 2023-06-26 19:35:12 -04:00
fast_commit.c ext4: make state in ext4_mb_mark_bb to be bool 2023-10-05 22:32:15 -04:00
fast_commit.h
file.c ext4: replace deprecated strncpy with alternatives 2024-05-02 23:55:10 -04:00
fsmap.c ext4: port block device access to file 2024-02-25 12:05:26 +01:00
fsmap.h
fsync.c ext4: drop EXT4_MF_FS_ABORTED flag 2023-07-29 18:37:53 -04:00
hash.c ext4: remove redundant checks of s_encoding 2023-08-27 11:27:13 -04:00
ialloc.c ext4: convert to new timestamp accessors 2023-10-18 13:26:21 +02:00
indirect.c ext4: remove unnecessary parameter "needed" in ext4_discard_preallocations 2024-01-18 10:52:45 -05:00
inline.c mm: add folio_zero_tail() and use it in ext4 2023-12-10 16:51:36 -08:00
inode-test.c ext4: convert to ctime accessor functions 2023-07-24 10:29:54 +02:00
inode.c ext4: set FMODE_CAN_ODIRECT instead of a dummy direct_IO method 2024-05-02 10:53:32 -04:00
ioctl.c ext4: replace deprecated strncpy with alternatives 2024-05-02 23:55:10 -04:00
Kconfig fs: add CONFIG_BUFFER_HEAD 2023-08-02 09:13:09 -06:00
Makefile
mballoc-test.c ext4: initialize sbi->s_freeclusters_counter and sbi->s_dirtyclusters_counter before use in kunit test 2024-03-07 13:32:54 -05:00
mballoc.c ext4: clean up s_mb_rb_lock to fix build warnings with C=1 2024-05-02 23:48:31 -04:00
mballoc.h ext4: set type of ac_groups_linear_remaining to __u32 to avoid overflow 2024-05-02 23:48:31 -04:00
migrate.c
mmp.c ext4: replace read-only check for shutdown check in mmp code 2023-07-29 18:37:53 -04:00
move_extent.c ext4: remove unnecessary parameter "needed" in ext4_discard_preallocations 2024-01-18 10:52:45 -05:00
namei.c ext4: avoid excessive credit estimate in ext4_tmpfile() 2024-05-02 14:49:16 -04:00
orphan.c
page-io.c fs: convert block_write_full_page to block_write_full_folio 2023-12-29 11:58:35 -08:00
readpage.c ext4: use folio_end_read() 2023-10-18 14:34:16 -07:00
resize.c ext4: enable meta_bg only when new desc blocks are needed 2024-03-07 13:32:54 -05:00
super.c ext4: replace deprecated strncpy with alternatives 2024-05-02 23:55:10 -04:00
symlink.c ext4_get_link(): fix breakage in RCU mode 2024-02-25 02:10:32 -05:00
sysfs.c ext4: add positive int attr pointer to avoid sysfs variables overflow 2024-05-02 23:48:30 -04:00
truncate.h
verity.c
xattr.c ext4: do not create EA inode under buffer lock 2024-05-03 00:02:24 -04:00
xattr.h ext4: move ext4_xattr_handlers to .rodata 2023-10-09 16:24:16 +02:00
xattr_hurd.c
xattr_security.c
xattr_trusted.c
xattr_user.c