static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
{
	struct nfc_dev *dev;
	struct nfc_llcp_local *local;
	int rc = 0;
	struct sk_buff *msg = NULL;
	u32 idx;

	if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
		return -EINVAL;

	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);

	dev = nfc_get_device(idx);
	if (!dev)
		return -ENODEV;

	device_lock(&dev->dev);

	local = nfc_llcp_find_local(dev);
	if (!local) {
		rc = -ENODEV;
		goto exit;
	}

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg) {
		rc = -ENOMEM;
		goto exit;
	}

	rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);

exit:
	device_unlock(&dev->dev);

	nfc_put_device(dev);

	if (rc < 0) {
		if (msg)
			nlmsg_free(msg);

		return rc;
	}

	return genlmsg_reply(msg, info);
}

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