static int dvb_usbv2_adapter_frontend_init(struct dvb_usb_adapter *adap)
{
	int ret, i, count_registered = 0;
	struct dvb_usb_device *d = adap_to_d(adap);
	dev_dbg(&d->udev->dev, "%s: adap=%d\n", __func__, adap->id);

	memset(adap->fe, 0, sizeof(adap->fe));
	adap->active_fe = -1;

	if (d->props->frontend_attach) {
		ret = d->props->frontend_attach(adap);
		if (ret < 0) {
			dev_dbg(&d->udev->dev,
					"%s: frontend_attach() failed=%d\n",
					__func__, ret);
			goto err_dvb_frontend_detach;
		}
	} else {
		dev_dbg(&d->udev->dev, "%s: frontend_attach() do not exists\n",
				__func__);
		ret = 0;
		goto err;
	}

	for (i = 0; i < MAX_NO_OF_FE_PER_ADAP && adap->fe[i]; i++) {
		adap->fe[i]->id = i;
		/* re-assign sleep and wakeup functions */
		adap->fe_init[i] = adap->fe[i]->ops.init;
		adap->fe[i]->ops.init = dvb_usb_fe_init;
		adap->fe_sleep[i] = adap->fe[i]->ops.sleep;
		adap->fe[i]->ops.sleep = dvb_usb_fe_sleep;

		ret = dvb_register_frontend(&adap->dvb_adap, adap->fe[i]);
		if (ret < 0) {
			dev_err(&d->udev->dev,
					"%s: frontend%d registration failed\n",
					KBUILD_MODNAME, i);
			goto err_dvb_unregister_frontend;
		}

		count_registered++;
	}

	if (d->props->tuner_attach) {
		ret = d->props->tuner_attach(adap);
		if (ret < 0) {
			dev_dbg(&d->udev->dev, "%s: tuner_attach() failed=%d\n",
					__func__, ret);
			goto err_dvb_unregister_frontend;
		}
	}

	ret = dvb_create_media_graph(&adap->dvb_adap, true);
	if (ret < 0)
		goto err_dvb_unregister_frontend;

	ret = dvb_usbv2_media_device_register(adap);

	return ret;

err_dvb_unregister_frontend:
	for (i = count_registered - 1; i >= 0; i--)
		dvb_unregister_frontend(adap->fe[i]);

err_dvb_frontend_detach:
	for (i = MAX_NO_OF_FE_PER_ADAP - 1; i >= 0; i--) {
		if (adap->fe[i]) {
			dvb_frontend_detach(adap->fe[i]);
			adap->fe[i] = NULL;
		}
	}

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.