mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-28 05:12:49 +00:00
ext4: avoid allocating blocks from corrupted group in ext4_mb_find_by_goal()
[ Upstream commit 832698373a
]
Places the logic for checking if the group's block bitmap is corrupt under
the protection of the group lock to avoid allocating blocks from the group
with a corrupted block bitmap.
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20240104142040.2835097-8-libaokun1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
4c21fa60a6
commit
8de8305a25
1 changed files with 4 additions and 5 deletions
|
@ -2236,12 +2236,10 @@ int ext4_mb_find_by_goal(struct ext4_allocation_context *ac,
|
|||
if (err)
|
||||
return err;
|
||||
|
||||
if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(e4b->bd_info))) {
|
||||
ext4_mb_unload_buddy(e4b);
|
||||
return 0;
|
||||
}
|
||||
|
||||
ext4_lock_group(ac->ac_sb, group);
|
||||
if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(e4b->bd_info)))
|
||||
goto out;
|
||||
|
||||
max = mb_find_extent(e4b, ac->ac_g_ex.fe_start,
|
||||
ac->ac_g_ex.fe_len, &ex);
|
||||
ex.fe_logical = 0xDEADFA11; /* debug value */
|
||||
|
@ -2274,6 +2272,7 @@ int ext4_mb_find_by_goal(struct ext4_allocation_context *ac,
|
|||
ac->ac_b_ex = ex;
|
||||
ext4_mb_use_best_found(ac, e4b);
|
||||
}
|
||||
out:
|
||||
ext4_unlock_group(ac->ac_sb, group);
|
||||
ext4_mb_unload_buddy(e4b);
|
||||
|
||||
|
|
Loading…
Reference in a new issue