struct sk_buff *skb_recv_datagram(struct sock *sk, unsigned int flags,
				  int noblock, int *err)
{
	int peeked, off = 0;

	return __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0),
				   &peeked, &off, err);
}

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.