static int cxusb_mygica_t230_frontend_attach(struct dvb_usb_adapter *adap)
{
	struct dvb_usb_device *d = adap->dev;
	struct cxusb_state *st = d->priv;
	struct i2c_adapter *adapter;
	struct i2c_client *client_demod;
	struct i2c_client *client_tuner;
	struct i2c_board_info info;
	struct si2168_config si2168_config;
	struct si2157_config si2157_config;

	/* Select required USB configuration */
	if (usb_set_interface(d->udev, 0, 0) < 0)
		err("set interface failed");

	/* Unblock all USB pipes */
	usb_clear_halt(d->udev,
		usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
	usb_clear_halt(d->udev,
		usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
	usb_clear_halt(d->udev,
		usb_rcvbulkpipe(d->udev, d->props.adapter[0].fe[0].stream.endpoint));

	/* attach frontend */
	si2168_config.i2c_adapter = &adapter;
	si2168_config.fe = &adap->fe_adap[0].fe;
	si2168_config.ts_mode = SI2168_TS_PARALLEL;
	si2168_config.ts_clock_inv = 1;
	memset(&info, 0, sizeof(struct i2c_board_info));
	strlcpy(info.type, "si2168", I2C_NAME_SIZE);
	info.addr = 0x64;
	info.platform_data = &si2168_config;
	request_module(info.type);
	client_demod = i2c_new_device(&d->i2c_adap, &info);
	if (client_demod == NULL || client_demod->dev.driver == NULL)
		return -ENODEV;

	if (!try_module_get(client_demod->dev.driver->owner)) {
		i2c_unregister_device(client_demod);
		return -ENODEV;
	}

	st->i2c_client_demod = client_demod;

	/* attach tuner */
	memset(&si2157_config, 0, sizeof(si2157_config));
	si2157_config.fe = adap->fe_adap[0].fe;
	si2157_config.if_port = 1;
	memset(&info, 0, sizeof(struct i2c_board_info));
	strlcpy(info.type, "si2157", I2C_NAME_SIZE);
	info.addr = 0x60;
	info.platform_data = &si2157_config;
	request_module(info.type);
	client_tuner = i2c_new_device(adapter, &info);
	if (client_tuner == NULL || client_tuner->dev.driver == NULL) {
		module_put(client_demod->dev.driver->owner);
		i2c_unregister_device(client_demod);
		return -ENODEV;
	}
	if (!try_module_get(client_tuner->dev.driver->owner)) {
		i2c_unregister_device(client_tuner);
		module_put(client_demod->dev.driver->owner);
		i2c_unregister_device(client_demod);
		return -ENODEV;
	}

	st->i2c_client_tuner = client_tuner;

	/* hook fe: need to resync the slave fifo when signal locks. */
	mutex_init(&st->stream_mutex);
	st->last_lock = 0;
	st->fe_read_status = adap->fe_adap[0].fe->ops.read_status;
	adap->fe_adap[0].fe->ops.read_status = cxusb_read_status;

	return 0;
}

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.