Commit 17220215 authored by Baokun Li's avatar Baokun Li Committed by Theodore Ts'o
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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: default avatarBaokun Li <libaokun1@huawei.com>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20240104142040.2835097-3-libaokun1@huawei.com


Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent 55583e89

fs/ext4/mballoc.c

+3 −0
Original line number Diff line number Diff line
@@ -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)