Re: [PATCH] vhost-user-fs: Back up vqs before cleaning up vhost_dev

["Michael S. Tsirkin" <mst@redhat.com>]

On Mon, Jan 30, 2023 at 11:02:25PM +0900, Akihiko Odaki wrote:
> vhost_dev_cleanup() clears vhost_dev so back up its vqs member to free
> the memory pointed by the member.
> 
> Fixes: 98fc1ada4c ("virtio: add vhost-user-fs base device")
> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>

> ---
>  hw/virtio/vhost-user-fs.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/virtio/vhost-user-fs.c b/hw/virtio/vhost-user-fs.c
> index f5049735ac..83fc20e49e 100644
> --- a/hw/virtio/vhost-user-fs.c
> +++ b/hw/virtio/vhost-user-fs.c
> @@ -273,6 +273,7 @@ static void vuf_device_unrealize(DeviceState *dev)
>  {
>      VirtIODevice *vdev = VIRTIO_DEVICE(dev);
>      VHostUserFS *fs = VHOST_USER_FS(dev);
> +    struct vhost_virtqueue *vhost_vqs = fs->vhost_dev.vqs;
>      int i;
>  
>      /* This will stop vhost backend if appropriate. */
> @@ -288,8 +289,7 @@ static void vuf_device_unrealize(DeviceState *dev)
>      }
>      g_free(fs->req_vqs);
>      virtio_cleanup(vdev);
> -    g_free(fs->vhost_dev.vqs);
> -    fs->vhost_dev.vqs = NULL;
> +    g_free(vhost_vqs);
>  }
>  
>  static struct vhost_dev *vuf_get_vhost(VirtIODevice *vdev)
> -- 
> 2.39.1