static int wdm_open(struct inode *inode, struct file *file)
{
	int minor = iminor(inode);
	int rv = -ENODEV;
	struct usb_interface *intf;
	struct wdm_device *desc;

	mutex_lock(&wdm_mutex);
	desc = wdm_find_device_by_minor(minor);
	if (!desc)
		goto out;

	intf = desc->intf;
	if (test_bit(WDM_DISCONNECTING, &desc->flags))
		goto out;
	file->private_data = desc;

	rv = usb_autopm_get_interface(desc->intf);
	if (rv < 0) {
		dev_err(&desc->intf->dev, "Error autopm - %d\n", rv);
		goto out;
	}

	/* using write lock to protect desc->count */
	mutex_lock(&desc->wlock);
	if (!desc->count++) {
		desc->werr = 0;
		desc->rerr = 0;
		rv = usb_submit_urb(desc->validity, GFP_KERNEL);
		if (rv < 0) {
			desc->count--;
			dev_err(&desc->intf->dev,
				"Error submitting int urb - %d\n", rv);
			rv = usb_translate_errors(rv);
		}
	} else {
		rv = 0;
	}
	mutex_unlock(&desc->wlock);
	if (desc->count == 1)
		desc->manage_power(intf, 1);
	usb_autopm_put_interface(desc->intf);
out:
	mutex_unlock(&wdm_mutex);
	return rv;
}

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.