static int start_command_port(struct usb_serial *serial)
{
	struct usb_serial_port *command_port;
	struct whiteheat_command_private *command_info;
	int retval = 0;

	command_port = serial->port[COMMAND_PORT];
	command_info = usb_get_serial_port_data(command_port);
	mutex_lock(&command_info->mutex);
	if (!command_info->port_running) {
		/* Work around HCD bugs */
		usb_clear_halt(serial->dev, command_port->read_urb->pipe);

		retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
		if (retval) {
			dev_err(&serial->dev->dev,
				"%s - failed submitting read urb, error %d\n",
				__func__, retval);
			goto exit;
		}
	}
	command_info->port_running++;

exit:
	mutex_unlock(&command_info->mutex);
	return retval;
}

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.