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linux/fs/ext4
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Ojaswin Mujoo faeff8b1ee ext4: check stripe size compatibility on remount as well 
[ Upstream commit ee85e0938a ]

We disable stripe size in __ext4_fill_super if it is not a multiple of
the cluster ratio however this check is missed when trying to remount.
This can leave us with cases where stripe < cluster_ratio after
remount:set making EXT4_B2C(sbi->s_stripe) become 0 that can cause some
unforeseen bugs like divide by 0.

Fix that by adding the check in remount path as well.

Reported-by: syzbot+1ad8bac5af24d01e2cbd@syzkaller.appspotmail.com
Tested-by: syzbot+1ad8bac5af24d01e2cbd@syzkaller.appspotmail.com
Reviewed-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Fixes: c3defd99d5 ("ext4: treat stripe in block unit")
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Link: https://patch.msgid.link/3a493bb503c3598e25dcfbed2936bb2dff3fece7.1725002410.git.ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-10-04 16:29:21 +02:00
..
.kunitconfig ext4: add .kunitconfig fragment to enable ext4-specific tests 2021-02-11 23:16:30 -05:00
acl.c ext4: convert to ctime accessor functions 2023-07-24 10:29:54 +02:00
acl.h ext4: apply umask if ACL support is disabled 2023-11-28 17:20:15 +00:00
balloc.c ext4: add correct group descriptors and reserved GDT blocks to system zone 2023-08-27 11:27:12 -04:00
bitmap.c ext4: remove useless conditional branch code 2023-04-19 23:39:08 -04:00
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 ext4: fix memory leaks in ext4_fname_{setup_filename,prepare_lookup} 2023-08-05 08:17:56 -04:00
dir.c ext4: fix spelling errors in comments 2022-05-11 15:19:06 -04:00
ext4.h quota: Properly annotate i_dquot arrays with __rcu 2024-03-26 18:19:46 -04:00
ext4_extents.h ext4: fix sparse warnings 2021-08-30 23:36:50 -04:00
ext4_jbd2.c Many ext4 and jbd2 cleanups and bug fixes for v6.6-rc1. 2023-08-31 15:18:15 -07:00
ext4_jbd2.h ext4: split ext4_journal_start trace for debug 2022-12-01 10:46:54 -05:00
extents.c ext4: set the type of max_zeroout to unsigned int to avoid overflow 2024-08-29 17:33:40 +02:00
extents_status.c ext4: fix infinite loop when replaying fast_commit 2024-08-03 08:53:53 +02:00
extents_status.h ext4: make ext4_es_insert_extent() return void 2023-06-26 19:35:12 -04:00
fast_commit.c ext4: fix possible tid_t sequence overflows 2024-09-12 11:11:37 +02:00
fast_commit.h ext4: add missing validation of fast-commit record lengths 2022-12-08 21:49:24 -05:00
file.c ext4: fix warning in ext4_dio_write_end_io() 2023-12-20 17:01:42 +01:00
fsmap.c ext4: fix another off-by-one fsmap error on 1k block filesystems 2023-03-07 20:20:48 -05:00
fsmap.h ext4: fsmap: fix the block/inode bitmap comment 2021-06-24 09:48:29 -04:00
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: avoid negative min_clusters in find_group_orlov() 2024-10-04 16:29:20 +02:00
indirect.c ext4: only update i_reserved_data_blocks on successful block allocation 2023-06-26 19:34:56 -04:00
inline.c ext4: avoid OOB when system.data xattr changes underneath the filesystem 2024-10-04 16:29:21 +02:00
inode-test.c ext4: convert to ctime accessor functions 2023-07-24 10:29:54 +02:00
inode.c ext4: sanity check for NULL pointer after ext4_force_shutdown 2024-08-19 06:04:29 +02:00
ioctl.c Many ext4 and jbd2 cleanups and bug fixes for v6.6-rc1. 2023-08-31 15:18:15 -07:00
Kconfig fs: add CONFIG_BUFFER_HEAD 2023-08-02 09:13:09 -06:00
Makefile ext4: move ext4 crypto code to its own file crypto.c 2022-05-21 22:24:24 -04:00
mballoc.c ext4: clear EXT4_GROUP_INFO_WAS_TRIMMED_BIT even mount with discard 2024-10-04 16:29:20 +02:00
mballoc.h ext4: set type of ac_groups_linear_remaining to __u32 to avoid overflow 2024-06-16 13:47:44 +02:00
migrate.c ext4: avoid deadlock in fs reclaim with page writeback 2023-05-13 18:05:04 -04:00
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: fix double-free of blocks due to wrong extents moved_len 2024-02-23 09:25:04 +01:00
namei.c ext4: make sure the first directory block is not a hole 2024-08-03 08:54:17 +02:00
orphan.c ext4: remove trailing newline from ext4_msg() message 2022-12-08 21:49:23 -05:00
page-io.c ext4: make ext4_forced_shutdown() take struct super_block 2023-07-29 18:37:24 -04:00
readpage.c ext4: Call fsverity_verify_folio() 2023-06-15 00:02:10 -04:00
resize.c ext4: fix corruption during on-line resize 2024-04-03 15:28:28 +02:00
super.c ext4: check stripe size compatibility on remount as well 2024-10-04 16:29:21 +02:00
symlink.c fs: port ->getattr() to pass mnt_idmap 2023-01-19 09:24:25 +01:00
sysfs.c ext4: avoid ptr null pointer dereference 2024-07-18 13:21:25 +02:00
truncate.h ext4: Convert to use mapping->invalidate_lock 2021-07-13 14:29:00 +02:00
verity.c - Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of 2023-04-27 19:42:02 -07:00
xattr.c ext4: do not create EA inode under buffer lock 2024-08-19 06:04:28 +02:00
xattr.h ext4: remove EA inode entry from mbcache on inode eviction 2022-08-02 23:56:25 -04:00
xattr_hurd.c fs: port xattr to mnt_idmap 2023-01-19 09:24:28 +01:00
xattr_security.c fs: port xattr to mnt_idmap 2023-01-19 09:24:28 +01:00
xattr_trusted.c fs: port xattr to mnt_idmap 2023-01-19 09:24:28 +01:00
xattr_user.c fs: port xattr to mnt_idmap 2023-01-19 09:24:28 +01:00