static void wdm_disconnect(struct usb_interface *intf)
{
	struct wdm_device *desc;
	unsigned long flags;

	usb_deregister_dev(intf, &wdm_class);
	desc = wdm_find_device(intf);
	mutex_lock(&wdm_mutex);

	/* the spinlock makes sure no new urbs are generated in the callbacks */
	spin_lock_irqsave(&desc->iuspin, flags);
	set_bit(WDM_DISCONNECTING, &desc->flags);
	set_bit(WDM_READ, &desc->flags);
	/* to terminate pending flushes */
	clear_bit(WDM_IN_USE, &desc->flags);
	spin_unlock_irqrestore(&desc->iuspin, flags);
	wake_up_all(&desc->wait);
	mutex_lock(&desc->rlock);
	mutex_lock(&desc->wlock);
	kill_urbs(desc);
	cancel_work_sync(&desc->rxwork);
	mutex_unlock(&desc->wlock);
	mutex_unlock(&desc->rlock);

	/* the desc->intf pointer used as list key is now invalid */
	spin_lock(&wdm_device_list_lock);
	list_del(&desc->device_list);
	spin_unlock(&wdm_device_list_lock);

	if (!desc->count)
		cleanup(desc);
	else
		dev_dbg(&intf->dev, "%s: %d open files - postponing cleanup\n", __func__, desc->count);
	mutex_unlock(&wdm_mutex);
}

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.