static void nfc_llcp_recv_agf(struct nfc_llcp_local *local, struct sk_buff *skb)
{
	u8 ptype;
	u16 pdu_len;
	struct sk_buff *new_skb;

	if (skb->len <= LLCP_HEADER_SIZE) {
		pr_err("Malformed AGF PDU\n");
		return;
	}

	skb_pull(skb, LLCP_HEADER_SIZE);

	while (skb->len > LLCP_AGF_PDU_HEADER_SIZE) {
		pdu_len = skb->data[0] << 8 | skb->data[1];

		skb_pull(skb, LLCP_AGF_PDU_HEADER_SIZE);

		if (pdu_len < LLCP_HEADER_SIZE || pdu_len > skb->len) {
			pr_err("Malformed AGF PDU\n");
			return;
		}

		ptype = nfc_llcp_ptype(skb);

		if (ptype == LLCP_PDU_SYMM || ptype == LLCP_PDU_AGF)
			goto next;

		new_skb = nfc_alloc_recv_skb(pdu_len, GFP_KERNEL);
		if (new_skb == NULL) {
			pr_err("Could not allocate PDU\n");
			return;
		}

		skb_put_data(new_skb, skb->data, pdu_len);

		nfc_llcp_rx_skb(local, new_skb);

		kfree_skb(new_skb);
next:
		skb_pull(skb, pdu_len);
	}
}

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