From 172202152a125955367393956acf5f4ffd092e0d Mon Sep 17 00:00:00 2001 From: Baokun Li Date: Thu, 4 Jan 2024 22:20:34 +0800 Subject: ext4: do not trim the group with corrupted block bitmap Otherwise operating on an incorrupted block bitmap can lead to all sorts of unknown problems. Signed-off-by: Baokun Li Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20240104142040.2835097-3-libaokun1@huawei.com Signed-off-by: Theodore Ts'o --- fs/ext4/mballoc.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'fs/ext4') diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index f44f668e407f..c86c90b494de 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -6761,6 +6761,9 @@ __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) -- cgit v1.2.3