Re: [PATCH] virtio-9p-device: fix memleak in virtio_9p_device_unrealize

[Christian Schoenebeck <qemu_oss@crudebyte.com>]

On Dienstag, 14. Januar 2020 08:40:20 CET pannengyuan@huawei.com wrote:
> From: Pan Nengyuan <pannengyuan@huawei.com>
> 
> v->vq forgot to cleanup in virtio_9p_device_unrealize, the memory leak
> stack is as follow:
> 
> Direct leak of 14336 byte(s) in 2 object(s) allocated from:
>   #0 0x7f819ae43970 (/lib64/libasan.so.5+0xef970)  ??:?
>   #1 0x7f819872f49d (/lib64/libglib-2.0.so.0+0x5249d)  ??:?
>   #2 0x55a3a58da624 (./x86_64-softmmu/qemu-system-x86_64+0x2c14624) 
> /mnt/sdb/qemu/hw/virtio/virtio.c:2327 #3 0x55a3a571bac7
> (./x86_64-softmmu/qemu-system-x86_64+0x2a55ac7) 
> /mnt/sdb/qemu/hw/9pfs/virtio-9p-device.c:209 #4 0x55a3a58e7bc6
> (./x86_64-softmmu/qemu-system-x86_64+0x2c21bc6) 
> /mnt/sdb/qemu/hw/virtio/virtio.c:3504 #5 0x55a3a5ebfb37
> (./x86_64-softmmu/qemu-system-x86_64+0x31f9b37) 
> /mnt/sdb/qemu/hw/core/qdev.c:876
> 
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Pan Nengyuan <pannengyuan@huawei.com>
> ---
>  hw/9pfs/virtio-9p-device.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
> index b5a7c03f26..b146387ae2 100644
> --- a/hw/9pfs/virtio-9p-device.c
> +++ b/hw/9pfs/virtio-9p-device.c
> @@ -215,6 +215,7 @@ static void virtio_9p_device_unrealize(DeviceState *dev,
> Error **errp) V9fsVirtioState *v = VIRTIO_9P(dev);
>      V9fsState *s = &v->state;
> 
> +    virtio_delete_queue(v->vq);
>      virtio_cleanup(vdev);
>      v9fs_device_unrealize_common(s, errp);
>  }

Looks like you are using an old interface. The new one is

	void virtio_del_queue(VirtIODevice *vdev, int n);

Best regards,
Christian Schoenebeck