static void virtio_queue_guest_notifier_read(EventNotifier *n)
{
    VirtQueue *vq = container_of(n, VirtQueue, guest_notifier);
    if (event_notifier_test_and_clear(n)) {
        virtio_irq(vq);
    }
}

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.