4.19-stable review patch. If anyone has any objections, please let me know.
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From: Baokun Li libaokun1@huawei.com
[ Upstream commit 172202152a125955367393956acf5f4ffd092e0d ]
Otherwise operating on an incorrupted block bitmap can lead to all sorts of unknown problems.
Signed-off-by: Baokun Li libaokun1@huawei.com Reviewed-by: Jan Kara jack@suse.cz Link: https://lore.kernel.org/r/20240104142040.2835097-3-libaokun1@huawei.com Signed-off-by: Theodore Ts'o tytso@mit.edu Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ext4/mballoc.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 5dcc3cad5c7d3..75dbe40ed8f72 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -5219,6 +5219,9 @@ static int ext4_try_to_trim_range(struct super_block *sb, bool set_trimmed = false; void *bitmap;
+ if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(e4b->bd_info))) + return 0; + last = ext4_last_grp_cluster(sb, e4b->bd_group); bitmap = e4b->bd_bitmap; if (start == 0 && max >= last)