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| author | Baokun Li <libaokun1@huawei.com> | 2024-01-04 22:20:39 +0800 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2024-01-18 10:50:24 -0500 |
| commit | 832698373a25950942c04a512daa652c18a9b513 (patch) | |
| tree | 27cc127c2f14d25821fe369ba90fab0f8970f718 | |
| parent | 4530b3660d396a646aad91a787b6ab37cf604b53 (diff) | |
| download | linux-stable-832698373a25950942c04a512daa652c18a9b513.tar.gz linux-stable-832698373a25950942c04a512daa652c18a9b513.tar.bz2 linux-stable-832698373a25950942c04a512daa652c18a9b513.zip | |
ext4: avoid allocating blocks from corrupted group in ext4_mb_find_by_goal()
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>
| -rw-r--r-- | fs/ext4/mballoc.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 82afe275e6c8..2069d768c619 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -2336,12 +2336,10 @@ 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 */ @@ -2374,6 +2372,7 @@ 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); |