void *qemu_get_virtqueue_element(QEMUFile *f, size_t sz)
{
    VirtQueueElement *elem;
    VirtQueueElementOld data;
    int i;

    qemu_get_buffer(f, (uint8_t *)&data, sizeof(VirtQueueElementOld));

    elem = virtqueue_alloc_element(sz, data.out_num, data.in_num);
    elem->index = data.index;

    for (i = 0; i < elem->in_num; i++) {
        elem->in_addr[i] = data.in_addr[i];
    }

    for (i = 0; i < elem->out_num; i++) {
        elem->out_addr[i] = data.out_addr[i];
    }

    for (i = 0; i < elem->in_num; i++) {
        /* Base is overwritten by virtqueue_map.  */
        elem->in_sg[i].iov_base = 0;
        elem->in_sg[i].iov_len = data.in_sg[i].iov_len;
    }

    for (i = 0; i < elem->out_num; i++) {
        /* Base is overwritten by virtqueue_map.  */
        elem->out_sg[i].iov_base = 0;
        elem->out_sg[i].iov_len = data.out_sg[i].iov_len;
    }

    virtqueue_map(elem);
    return elem;
}

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.