static void virtio_gpu_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
{
    VirtIOGPU *g = VIRTIO_GPU(vdev);
    struct virtio_gpu_ctrl_command *cmd;

    if (!virtio_queue_ready(vq)) {
        return;
    }

#ifdef CONFIG_VIRGL
    if (!g->renderer_inited && g->use_virgl_renderer) {
        virtio_gpu_virgl_init(g);
        g->renderer_inited = true;
    }
#endif

    cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
    while (cmd) {
        cmd->vq = vq;
        cmd->error = 0;
        cmd->finished = false;
        cmd->waiting = false;
        QTAILQ_INSERT_TAIL(&g->cmdq, cmd, next);
        cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
    }

    virtio_gpu_process_cmdq(g);

#ifdef CONFIG_VIRGL
    if (g->use_virgl_renderer) {
        virtio_gpu_virgl_fence_poll(g);
    }
#endif
}

The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.