static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
{
	int ret;
	struct dvb_usb_adapter *adap = fe->dvb->priv;
	struct dvb_usb_device *d = adap_to_d(adap);
	dev_dbg(&d->udev->dev, "%s: adap=%d fe=%d\n", __func__, adap->id,
			fe->id);

	if (!adap->suspend_resume_active) {
		set_bit(ADAP_SLEEP, &adap->state_bits);
		wait_on_bit(&adap->state_bits, ADAP_STREAMING,
				TASK_UNINTERRUPTIBLE);
	}

	if (adap->fe_sleep[fe->id]) {
		ret = adap->fe_sleep[fe->id](fe);
		if (ret < 0)
			goto err;
	}

	if (d->props->frontend_ctrl) {
		ret = d->props->frontend_ctrl(fe, 0);
		if (ret < 0)
			goto err;
	}

	ret = dvb_usbv2_device_power_ctrl(d, 0);
	if (ret < 0)
		goto err;
err:
	if (!adap->suspend_resume_active) {
		adap->active_fe = -1;
		clear_bit(ADAP_SLEEP, &adap->state_bits);
		smp_mb__after_atomic();
		wake_up_bit(&adap->state_bits, ADAP_SLEEP);
	}

	dev_dbg(&d->udev->dev, "%s: ret=%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.