static void virtio_net_instance_init(Object *obj)
{
    VirtIONet *n = VIRTIO_NET(obj);

    /*
     * The default config_size is sizeof(struct virtio_net_config).
     * Can be overriden with virtio_net_set_config_size.
     */
    n->config_size = sizeof(struct virtio_net_config);
}

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.