void virtio_queue_set_align(VirtIODevice *vdev, int n, int align)
{
    BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
    VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);

    /* virtio-1 compliant devices cannot change the alignment */
    if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) {
        error_report("tried to modify queue alignment for virtio-1 device");
        return;
    }
    /* Check that the transport told us it was going to do this
     * (so a buggy transport will immediately assert rather than
     * silently failing to migrate this state)
     */
    assert(k->has_variable_vring_alignment);

    vdev->vq[n].vring.align = align;
    virtio_queue_update_rings(vdev, n);
}

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.