static void config_work_handler(struct work_struct *work)
{
	struct ports_device *portdev;

	portdev = container_of(work, struct ports_device, config_work);
	if (!use_multiport(portdev)) {
		struct virtio_device *vdev;
		struct port *port;
		u16 rows, cols;

		vdev = portdev->vdev;
		virtio_cread(vdev, struct virtio_console_config, cols, &cols);
		virtio_cread(vdev, struct virtio_console_config, rows, &rows);

		port = find_port_by_id(portdev, 0);
		set_console_size(port, rows, cols);

		/*
		 * We'll use this way of resizing only for legacy
		 * support.  For newer userspace
		 * (VIRTIO_CONSOLE_F_MULTPORT+), use control messages
		 * to indicate console size changes so that it can be
		 * done per-port.
		 */
		resize_console(port);
	}
}

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.