cifsd: fix a precedence bug in parse_dacl()

mainline inclusion
from mainline-5.15-rc1
commit 86df49e1
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I60T7G
CVE: NA

Reference: https://git.kernel.org/torvalds/linux/c/86df49e105af

-------------------------------

The shift has higher precedence than mask so this doesn't work as
intended.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NSergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: NNamjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: NSteve French <stfrench@microsoft.com>
Signed-off-by: NJason Yan <yanaijie@huawei.com>
Signed-off-by: NZhong Jinghua <zhongjinghua@huawei.com>

fs/cifsd/smbacl.c

@@ -520,7 +520,7 @@ static void parse_dacl(struct smb_acl *pdacl, char *end_of_acl,
 			fattr->cf_gid;
 		acl_state.groups->aces[acl_state.groups->n++].perms.allow =
 			(mode & 0070) >> 3;
-		default_acl_state.group.allow = mode & 0070 >> 3;
+		default_acl_state.group.allow = (mode & 0070) >> 3;
 		default_acl_state.groups->aces[default_acl_state.groups->n].gid =
 			fattr->cf_gid;
 		default_acl_state.groups->aces[default_acl_state.groups->n++].perms.allow =