static int dvb_usbv2_device_power_ctrl(struct dvb_usb_device *d, int onoff)
{
	int ret;

	if (onoff)
		d->powered++;
	else
		d->powered--;

	if (d->powered == 0 || (onoff && d->powered == 1)) {
		/* when switching from 1 to 0 or from 0 to 1 */
		dev_dbg(&d->udev->dev, "%s: power=%d\n", __func__, onoff);
		if (d->props->power_ctrl) {
			ret = d->props->power_ctrl(d, onoff);
			if (ret < 0)
				goto err;
		}
	}

	return 0;
err:
	dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
	return ret;
}

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.