Unverified Commit ae70d541 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!5778 ext4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found() 

Merge Pull Request from: @ci-robot 
 
PR sync from: ZhaoLong Wang <wangzhaolong1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/2T45BRMSNBETUBB3FK2OWD72KPVZYCIH/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9E2M9 
 
Link:https://gitee.com/openeuler/kernel/pulls/5778

 

Reviewed-by: default avatarLiu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
parents d6b591a9 5e19c94a

fs/ext4/mballoc.c

+4 −0
Original line number Diff line number Diff line
@@ -1803,6 +1803,9 @@ int ext4_mb_try_best_found(struct ext4_allocation_context *ac, 
		return err;



	ext4_lock_group(ac->ac_sb, group);

	if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(e4b->bd_info)))

		goto out;



	max = mb_find_extent(e4b, ex.fe_start, ex.fe_len, &ex);



	if (max > 0) {
@@ -1810,6 +1813,7 @@ int ext4_mb_try_best_found(struct ext4_allocation_context *ac, 
		ext4_mb_use_best_found(ac, e4b);

	}



out:

	ext4_unlock_group(ac->ac_sb, group);

	ext4_mb_unload_buddy(e4b);