Unverified Commit 651dfbec authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!15231 cifs: Prevent NULL pointer dereference caused by cifs_sb->rsize is 0 

Merge Pull Request from: @ci-robot 
 
PR sync from: Wang Zhaolong <wangzhaolong1@huawei.com>
https://mailweb.openeuler.org/archives/list/kernel@openeuler.org/message/VTFEAGO2HUUAVL5XH54PANYTPGU4A6FO/ 
 
https://gitee.com/openeuler/kernel/issues/IBO3FG 
 
Link:https://gitee.com/openeuler/kernel/pulls/15231

 

Reviewed-by: default avatarYuan Can <yuancan@huawei.com>
Signed-off-by: default avatarYuan Can <yuancan@huawei.com>
parents 55990887 799fe5b5

fs/cifs/connect.c

+5 −0
Original line number Diff line number Diff line
@@ -4259,6 +4259,11 @@ cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) 


	cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);

	cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);

	if (cifs_sb->rsize == 0) {

		cifs_dbg(VFS, "Negotiated rsize is 0, mount failed\n");

		rc = -EINVAL;

		goto mount_fail_check;

	}



remote_path_check:

#ifdef CONFIG_CIFS_DFS_UPCALL