6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Baokun Li <libaokun1@xxxxxxxxxx> [ Upstream commit 172202152a125955367393956acf5f4ffd092e0d ] Otherwise operating on an incorrupted block bitmap can lead to all sorts of unknown problems. Signed-off-by: Baokun Li <libaokun1@xxxxxxxxxx> Reviewed-by: Jan Kara <jack@xxxxxxx> Link: https://lore.kernel.org/r/20240104142040.2835097-3-libaokun1@xxxxxxxxxx Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- fs/ext4/mballoc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index f55ab800a7539..870397f3de559 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -6953,6 +6953,9 @@ __releases(ext4_group_lock_ptr(sb, e4b->bd_group)) 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) -- 2.43.0
