static void vhost_net_ubuf_put_and_wait(struct vhost_net_ubuf_ref *ubufs)
{
	vhost_net_ubuf_put(ubufs);
	wait_event(ubufs->wait, !atomic_read(&ubufs->refcount));
}

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.