static void virtio_device_realize(DeviceState *dev, Error **errp)
{
    VirtIODevice *vdev = VIRTIO_DEVICE(dev);
    VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(dev);
    Error *err = NULL;

    if (vdc->realize != NULL) {
        vdc->realize(dev, &err);
        if (err != NULL) {
            error_propagate(errp, err);
            return;
        }
    }

    virtio_bus_device_plugged(vdev, &err);
    if (err != NULL) {
        error_propagate(errp, err);
        return;
    }
}

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.