static void wdm_int_callback(struct urb *urb)
{
	int rv = 0;
	int status = urb->status;
	struct wdm_device *desc;
	struct usb_cdc_notification *dr;

	desc = urb->context;
	dr = (struct usb_cdc_notification *)desc->sbuf;

	if (status) {
		switch (status) {
		case -ESHUTDOWN:
		case -ENOENT:
		case -ECONNRESET:
			return; /* unplug */
		case -EPIPE:
			set_bit(WDM_INT_STALL, &desc->flags);
			dev_err(&desc->intf->dev, "Stall on int endpoint\n");
			goto sw; /* halt is cleared in work */
		default:
			dev_err(&desc->intf->dev,
				"nonzero urb status received: %d\n", status);
			break;
		}
	}

	if (urb->actual_length < sizeof(struct usb_cdc_notification)) {
		dev_err(&desc->intf->dev, "wdm_int_callback - %d bytes\n",
			urb->actual_length);
		goto exit;
	}

	switch (dr->bNotificationType) {
	case USB_CDC_NOTIFY_RESPONSE_AVAILABLE:
		dev_dbg(&desc->intf->dev,
			"NOTIFY_RESPONSE_AVAILABLE received: index %d len %d",
			dr->wIndex, dr->wLength);
		break;

	case USB_CDC_NOTIFY_NETWORK_CONNECTION:

		dev_dbg(&desc->intf->dev,
			"NOTIFY_NETWORK_CONNECTION %s network",
			dr->wValue ? "connected to" : "disconnected from");
		goto exit;
	default:
		clear_bit(WDM_POLL_RUNNING, &desc->flags);
		dev_err(&desc->intf->dev,
			"unknown notification %d received: index %d len %d\n",
			dr->bNotificationType, dr->wIndex, dr->wLength);
		goto exit;
	}

	spin_lock(&desc->iuspin);
	clear_bit(WDM_READ, &desc->flags);
	set_bit(WDM_RESPONDING, &desc->flags);
	if (!test_bit(WDM_DISCONNECTING, &desc->flags)
		&& !test_bit(WDM_SUSPENDING, &desc->flags)) {
		rv = usb_submit_urb(desc->response, GFP_ATOMIC);
		dev_dbg(&desc->intf->dev, "%s: usb_submit_urb %d",
			__func__, rv);
	}
	spin_unlock(&desc->iuspin);
	if (rv < 0) {
		clear_bit(WDM_RESPONDING, &desc->flags);
		if (rv == -EPERM)
			return;
		if (rv == -ENOMEM) {
sw:
			rv = schedule_work(&desc->rxwork);
			if (rv)
				dev_err(&desc->intf->dev,
					"Cannot schedule work\n");
		}
	}
exit:
	rv = usb_submit_urb(urb, GFP_ATOMIC);
	if (rv)
		dev_err(&desc->intf->dev,
			"%s - usb_submit_urb failed with result %d\n",
			__func__, rv);

}

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.