static int shutdown(struct socket *sock, int how)
{
	struct sock *sk = sock->sk;
	struct tipc_port *tport = tipc_sk_port(sk);
	struct sk_buff *buf;
	int res;

	if (how != SHUT_RDWR)
		return -EINVAL;

	lock_sock(sk);

	switch (sock->state) {
	case SS_CONNECTING:
	case SS_CONNECTED:

restart:
		/* Disconnect and send a 'FIN+' or 'FIN-' message to peer */
		buf = __skb_dequeue(&sk->sk_receive_queue);
		if (buf) {
			if (TIPC_SKB_CB(buf)->handle != NULL) {
				kfree_skb(buf);
				goto restart;
			}
			tipc_disconnect(tport->ref);
			tipc_reject_msg(buf, TIPC_CONN_SHUTDOWN);
		} else {
			tipc_shutdown(tport->ref);
		}

		sock->state = SS_DISCONNECTING;

		/* fall through */

	case SS_DISCONNECTING:

		/* Discard any unreceived messages */
		__skb_queue_purge(&sk->sk_receive_queue);

		/* Wake up anyone sleeping in poll */
		sk->sk_state_change(sk);
		res = 0;
		break;

	default:
		res = -ENOTCONN;
	}

	release_sock(sk);
	return res;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.