Unverified Commit ac772b55 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!14317 exfat: fix out-of-bounds access of directory entries 

Merge Pull Request from: @ci-robot 
 
PR sync from: Long Li <leo.lilong@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/QOHIGSB2ZOIF3Q5Q6WGLVH3QKZZV6PDT/ 
 
https://gitee.com/src-openeuler/kernel/issues/IBDHGB 
 
Link:https://gitee.com/openeuler/kernel/pulls/14317

 

Reviewed-by: default avatarLi Nan <linan122@huawei.com>
Signed-off-by: default avatarLi Nan <linan122@huawei.com>
parents 5ca706f2 bb848358

fs/exfat/namei.c

+8 −2
Original line number Diff line number Diff line
@@ -655,13 +655,19 @@ static int exfat_find(struct inode *dir, struct qstr *qname, 
	info->type = exfat_get_entry_type(ep);

	info->attr = le16_to_cpu(ep->dentry.file.attr);

	info->size = le64_to_cpu(ep2->dentry.stream.valid_size);



	info->start_clu = le32_to_cpu(ep2->dentry.stream.start_clu);

	if (!is_valid_cluster(sbi, info->start_clu) && info->size) {

		exfat_warn(sb, "start_clu is invalid cluster(0x%x)",

				info->start_clu);

		info->size = 0;

	}



	if (info->size == 0) {

		info->flags = ALLOC_NO_FAT_CHAIN;

		info->start_clu = EXFAT_EOF_CLUSTER;

	} else {

		info->flags = ep2->dentry.stream.flags;

		info->start_clu =

			le32_to_cpu(ep2->dentry.stream.start_clu);

	}



	exfat_get_entry_time(sbi, &info->crtime,