static long unix_stream_data_wait(struct sock *sk, long timeo,
				  struct sk_buff *last)
{
	DEFINE_WAIT(wait);

	unix_state_lock(sk);

	for (;;) {
		prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);

		if (skb_peek_tail(&sk->sk_receive_queue) != last ||
		    sk->sk_err ||
		    (sk->sk_shutdown & RCV_SHUTDOWN) ||
		    signal_pending(current) ||
		    !timeo)
			break;

		set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
		unix_state_unlock(sk);
		timeo = freezable_schedule_timeout(timeo);
		unix_state_lock(sk);
		clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
	}

	finish_wait(sk_sleep(sk), &wait);
	unix_state_unlock(sk);
	return timeo;
}

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.