static void nfc_llcp_recv_cc(struct nfc_llcp_local *local, struct sk_buff *skb)
{
	struct nfc_llcp_sock *llcp_sock;
	struct sock *sk;
	u8 dsap, ssap;

	dsap = nfc_llcp_dsap(skb);
	ssap = nfc_llcp_ssap(skb);

	llcp_sock = nfc_llcp_connecting_sock_get(local, dsap);
	if (llcp_sock == NULL) {
		pr_err("Invalid CC\n");
		nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN);

		return;
	}

	sk = &llcp_sock->sk;

	/* Unlink from connecting and link to the client array */
	nfc_llcp_sock_unlink(&local->connecting_sockets, sk);
	nfc_llcp_sock_link(&local->sockets, sk);
	llcp_sock->dsap = ssap;

	nfc_llcp_parse_connection_tlv(llcp_sock, &skb->data[LLCP_HEADER_SIZE],
				      skb->len - LLCP_HEADER_SIZE);

	sk->sk_state = LLCP_CONNECTED;
	sk->sk_state_change(sk);

	nfc_llcp_sock_put(llcp_sock);
}

The product dereferences a pointer that it expects to be valid but is NULL.