--- zzzz-none-000/linux-4.4.60/net/netfilter/xt_socket.c	2017-04-08 07:53:53.000000000 +0000
+++ wasp-540e-714/linux-4.4.60/net/netfilter/xt_socket.c	2019-07-03 09:21:34.000000000 +0000
@@ -229,7 +229,7 @@
 			transparent = xt_socket_sk_is_transparent(sk);
 
 		if (info->flags & XT_SOCKET_RESTORESKMARK && !wildcard &&
-		    transparent)
+		    transparent && sk_fullsock(sk))
 			pskb->mark = sk->sk_mark;
 
 		if (sk != skb->sk)
@@ -404,7 +404,7 @@
 			transparent = xt_socket_sk_is_transparent(sk);
 
 		if (info->flags & XT_SOCKET_RESTORESKMARK && !wildcard &&
-		    transparent)
+		    transparent && sk_fullsock(sk))
 			pskb->mark = sk->sk_mark;
 
 		if (sk != skb->sk)