void xenvif_disconnect(struct xenvif *vif)
{
	if (netif_carrier_ok(vif->dev))
		xenvif_carrier_off(vif);

	atomic_dec(&vif->refcnt);
	wait_event(vif->waiting_to_free, atomic_read(&vif->refcnt) == 0);

	del_timer_sync(&vif->credit_timeout);

	if (vif->irq)
		unbind_from_irqhandler(vif->irq, vif);

	unregister_netdev(vif->dev);

	xen_netbk_unmap_frontend_rings(vif);

	free_netdev(vif->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.