diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 36c7f616294a..fdc1de1cb4fa 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -1568,6 +1568,8 @@ int l2tp_tunnel_create(struct net *net, int fd, int version, u32 tunnel_id, u32
 			 tunnel_id, fd);
 		goto err;
 	}
+	if (sk->sk_family != PF_INET && sk->sk_family != PF_INET6)
+		goto err;
 	switch (encap) {
 	case L2TP_ENCAPTYPE_UDP:
 		if (sk->sk_protocol != IPPROTO_UDP) {