void qemu_put_virtqueue_element(QEMUFile *f, VirtQueueElement *elem)
{
    VirtQueueElementOld data;
    int i;

    memset(&data, 0, sizeof(data));
    data.index = elem->index;
    data.in_num = elem->in_num;
    data.out_num = elem->out_num;

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

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

    for (i = 0; i < elem->in_num; i++) {
        /* Base is overwritten by virtqueue_map when loading.  Do not
         * save it, as it would leak the QEMU address space layout.  */
        data.in_sg[i].iov_len = elem->in_sg[i].iov_len;
    }

    for (i = 0; i < elem->out_num; i++) {
        /* Do not save iov_base as above.  */
        data.out_sg[i].iov_len = elem->out_sg[i].iov_len;
    }
    qemu_put_buffer(f, (uint8_t *)&data, sizeof(VirtQueueElementOld));
}

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.