static void virtcons_remove(struct virtio_device *vdev)
{
	struct ports_device *portdev;
	struct port *port, *port2;

	portdev = vdev->priv;

	spin_lock_irq(&pdrvdata_lock);
	list_del(&portdev->list);
	spin_unlock_irq(&pdrvdata_lock);

	/* Disable interrupts for vqs */
	vdev->config->reset(vdev);
	/* Finish up work that's lined up */
	if (use_multiport(portdev))
		cancel_work_sync(&portdev->control_work);
	else
		cancel_work_sync(&portdev->config_work);

	list_for_each_entry_safe(port, port2, &portdev->ports, list)
		unplug_port(port);

	unregister_chrdev(portdev->chr_major, "virtio-portsdev");

	/*
	 * When yanking out a device, we immediately lose the
	 * (device-side) queues.  So there's no point in keeping the
	 * guest side around till we drop our final reference.  This
	 * also means that any ports which are in an open state will
	 * have to just stop using the port, as the vqs are going
	 * away.
	 */
	remove_controlq_data(portdev);
	remove_vqs(portdev);
	kfree(portdev);
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.