int dvb_usbv2_probe(struct usb_interface *intf,
		const struct usb_device_id *id)
{
	int ret;
	struct dvb_usb_device *d;
	struct usb_device *udev = interface_to_usbdev(intf);
	struct dvb_usb_driver_info *driver_info =
			(struct dvb_usb_driver_info *) id->driver_info;

	dev_dbg(&udev->dev, "%s: bInterfaceNumber=%d\n", __func__,
			intf->cur_altsetting->desc.bInterfaceNumber);

	if (!id->driver_info) {
		dev_err(&udev->dev, "%s: driver_info failed\n", KBUILD_MODNAME);
		ret = -ENODEV;
		goto err;
	}

	d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
	if (!d) {
		dev_err(&udev->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
		ret = -ENOMEM;
		goto err;
	}

	d->intf = intf;
	d->name = driver_info->name;
	d->rc_map = driver_info->rc_map;
	d->udev = udev;
	d->props = driver_info->props;

	if (intf->cur_altsetting->desc.bInterfaceNumber !=
			d->props->bInterfaceNumber) {
		ret = -ENODEV;
		goto err_free_all;
	}

	mutex_init(&d->usb_mutex);
	mutex_init(&d->i2c_mutex);

	if (d->props->size_of_priv) {
		d->priv = kzalloc(d->props->size_of_priv, GFP_KERNEL);
		if (!d->priv) {
			dev_err(&d->udev->dev, "%s: kzalloc() failed\n",
					KBUILD_MODNAME);
			ret = -ENOMEM;
			goto err_free_all;
		}
	}

	if (d->props->identify_state) {
		const char *name = NULL;
		ret = d->props->identify_state(d, &name);
		if (ret == 0) {
			;
		} else if (ret == COLD) {
			dev_info(&d->udev->dev,
					"%s: found a '%s' in cold state\n",
					KBUILD_MODNAME, d->name);

			if (!name)
				name = d->props->firmware;

			ret = dvb_usbv2_download_firmware(d, name);
			if (ret == 0) {
				/* device is warm, continue initialization */
				;
			} else if (ret == RECONNECTS_USB) {
				/*
				 * USB core will call disconnect() and then
				 * probe() as device reconnects itself from the
				 * USB bus. disconnect() will release all driver
				 * resources and probe() is called for 'new'
				 * device. As 'new' device is warm we should
				 * never go here again.
				 */
				goto exit;
			} else {
				goto err_free_all;
			}
		} else {
			goto err_free_all;
		}
	}

	dev_info(&d->udev->dev, "%s: found a '%s' in warm state\n",
			KBUILD_MODNAME, d->name);

	ret = dvb_usbv2_init(d);
	if (ret < 0)
		goto err_free_all;

	dev_info(&d->udev->dev,
			"%s: '%s' successfully initialized and connected\n",
			KBUILD_MODNAME, d->name);
exit:
	usb_set_intfdata(intf, d);

	return 0;
err_free_all:
	dvb_usbv2_exit(d);
err:
	dev_dbg(&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.