--- zzzz-none-000/linux-4.4.60/net/netlabel/netlabel_unlabeled.c	2017-04-08 07:53:53.000000000 +0000
+++ scorpion-7490-727/linux-4.4.60/net/netlabel/netlabel_unlabeled.c	2021-02-04 17:41:59.000000000 +0000
@@ -787,7 +787,8 @@
 {
 	u32 addr_len;
 
-	if (info->attrs[NLBL_UNLABEL_A_IPV4ADDR]) {
+	if (info->attrs[NLBL_UNLABEL_A_IPV4ADDR] &&
+	    info->attrs[NLBL_UNLABEL_A_IPV4MASK]) {
 		addr_len = nla_len(info->attrs[NLBL_UNLABEL_A_IPV4ADDR]);
 		if (addr_len != sizeof(struct in_addr) &&
 		    addr_len != nla_len(info->attrs[NLBL_UNLABEL_A_IPV4MASK]))