static struct device *bnep_get_device(struct bnep_session *session)
{
	struct hci_conn *conn;

	conn = l2cap_pi(session->sock->sk)->chan->conn->hcon;
	if (!conn)
		return NULL;

	return &conn->dev;
}

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.