diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index aff8397e8c7e..91750205a5de 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -28,6 +28,7 @@
 #include <linux/tcp.h>
 #include <linux/udp.h>
 #include <linux/dccp.h>
+#include <linux/icmpv6.h>
 #include <linux/slab.h>
 #include <linux/mutex.h>
 #include <linux/pipe_fs_i.h>
@@ -4009,6 +4010,9 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
 #ifdef SMACK_IPV6_PORT_LABELING
 		rc = smk_ipv6_port_check(sk, &sadd, SMK_RECEIVING);
 #endif /* SMACK_IPV6_PORT_LABELING */
+		if (rc != 0)
+			icmpv6_send(skb, ICMPV6_DEST_UNREACH,
+					ICMPV6_ADM_PROHIBITED, 0);
 		break;
 #endif /* CONFIG_IPV6 */
 	}