static int get_extra_state(QEMUFile *f, void *pv, size_t size)
{
    VirtIODevice *vdev = pv;
    BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
    VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);

    if (!k->load_extra_state) {
        return -1;
    } else {
        return k->load_extra_state(qbus->parent, f);
    }
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.