diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index 156680ddb042..5a6fcf349bdf 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -970,6 +970,12 @@ static int tcp_packet(struct nf_conn *conntrack,
 		    		conntrack->timeout.function((unsigned long)
 		    					    conntrack);
 		    	return -NF_REPEAT;
+		} else {
+			write_unlock_bh(&tcp_lock);
+			if (LOG_INVALID(IPPROTO_TCP))
+				nf_log_packet(pf, 0, skb, NULL, NULL,
+					      NULL, "nf_ct_tcp: invalid SYN");
+			return -NF_ACCEPT;
 		}
 	case TCP_CONNTRACK_CLOSE:
 		if (index == TCP_RST_SET