static struct gs_can *gs_make_candev(unsigned int channel,
				     struct usb_interface *intf,
				     struct gs_device_config *dconf)
{
	struct gs_can *dev;
	struct net_device *netdev;
	int rc;
	struct gs_device_bt_const *bt_const;

	bt_const = kmalloc(sizeof(*bt_const), GFP_KERNEL);
	if (!bt_const)
		return ERR_PTR(-ENOMEM);

	/* fetch bit timing constants */
	rc = usb_control_msg(interface_to_usbdev(intf),
			     usb_rcvctrlpipe(interface_to_usbdev(intf), 0),
			     GS_USB_BREQ_BT_CONST,
			     USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
			     channel,
			     0,
			     bt_const,
			     sizeof(*bt_const),
			     1000);

	if (rc < 0) {
		dev_err(&intf->dev,
			"Couldn't get bit timing const for channel (err=%d)\n",
			rc);
		kfree(bt_const);
		return ERR_PTR(rc);
	}

	/* create netdev */
	netdev = alloc_candev(sizeof(struct gs_can), GS_MAX_TX_URBS);
	if (!netdev) {
		dev_err(&intf->dev, "Couldn't allocate candev\n");
		kfree(bt_const);
		return ERR_PTR(-ENOMEM);
	}

	dev = netdev_priv(netdev);

	netdev->netdev_ops = &gs_usb_netdev_ops;

	netdev->flags |= IFF_ECHO; /* we support full roundtrip echo */

	/* dev settup */
	strcpy(dev->bt_const.name, "gs_usb");
	dev->bt_const.tseg1_min = bt_const->tseg1_min;
	dev->bt_const.tseg1_max = bt_const->tseg1_max;
	dev->bt_const.tseg2_min = bt_const->tseg2_min;
	dev->bt_const.tseg2_max = bt_const->tseg2_max;
	dev->bt_const.sjw_max = bt_const->sjw_max;
	dev->bt_const.brp_min = bt_const->brp_min;
	dev->bt_const.brp_max = bt_const->brp_max;
	dev->bt_const.brp_inc = bt_const->brp_inc;

	dev->udev = interface_to_usbdev(intf);
	dev->iface = intf;
	dev->netdev = netdev;
	dev->channel = channel;

	init_usb_anchor(&dev->tx_submitted);
	atomic_set(&dev->active_tx_urbs, 0);
	spin_lock_init(&dev->tx_ctx_lock);
	for (rc = 0; rc < GS_MAX_TX_URBS; rc++) {
		dev->tx_context[rc].dev = dev;
		dev->tx_context[rc].echo_id = GS_MAX_TX_URBS;
	}

	/* can settup */
	dev->can.state = CAN_STATE_STOPPED;
	dev->can.clock.freq = bt_const->fclk_can;
	dev->can.bittiming_const = &dev->bt_const;
	dev->can.do_set_bittiming = gs_usb_set_bittiming;

	dev->can.ctrlmode_supported = 0;

	if (bt_const->feature & GS_CAN_FEATURE_LISTEN_ONLY)
		dev->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;

	if (bt_const->feature & GS_CAN_FEATURE_LOOP_BACK)
		dev->can.ctrlmode_supported |= CAN_CTRLMODE_LOOPBACK;

	if (bt_const->feature & GS_CAN_FEATURE_TRIPLE_SAMPLE)
		dev->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;

	if (bt_const->feature & GS_CAN_FEATURE_ONE_SHOT)
		dev->can.ctrlmode_supported |= CAN_CTRLMODE_ONE_SHOT;

	SET_NETDEV_DEV(netdev, &intf->dev);

	if (dconf->sw_version > 1)
		if (bt_const->feature & GS_CAN_FEATURE_IDENTIFY)
			netdev->ethtool_ops = &gs_usb_ethtool_ops;

	kfree(bt_const);

	rc = register_candev(dev->netdev);
	if (rc) {
		free_candev(dev->netdev);
		dev_err(&intf->dev, "Couldn't register candev (err=%d)\n", rc);
		return ERR_PTR(rc);
	}

	return dev;
}

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.