static void catc_ctrl_run(struct catc *catc)
{
	struct ctrl_queue *q = catc->ctrl_queue + catc->ctrl_tail;
	struct usb_device *usbdev = catc->usbdev;
	struct urb *urb = catc->ctrl_urb;
	struct usb_ctrlrequest *dr = &catc->ctrl_dr;
	int status;

	dr->bRequest = q->request;
	dr->bRequestType = 0x40 | q->dir;
	dr->wValue = cpu_to_le16(q->value);
	dr->wIndex = cpu_to_le16(q->index);
	dr->wLength = cpu_to_le16(q->len);

        urb->pipe = q->dir ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0);
	urb->transfer_buffer_length = q->len;
	urb->transfer_buffer = catc->ctrl_buf;
	urb->setup_packet = (void *) dr;
	urb->dev = usbdev;

	if (!q->dir && q->buf && q->len)
		memcpy(catc->ctrl_buf, q->buf, q->len);

	if ((status = usb_submit_urb(catc->ctrl_urb, GFP_ATOMIC)))
		dev_err(&catc->usbdev->dev, "submit(ctrl_urb) status %d\n",
			status);
}

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.