Re: [dpdk-dev] [PATCH v1] vhost: set zmbufs to NULL when freed

["Xia, Chenbo" <chenbo.xia@intel.com>]

> -----Original Message-----
> From: Fu, Patrick <patrick.fu@intel.com>
> Sent: Wednesday, July 15, 2020 11:59 PM
> To: dev@dpdk.org; maxime.coquelin@redhat.com; Xia, Chenbo
> <chenbo.xia@intel.com>
> Cc: Wang, Yinan <yinan.wang@intel.com>; Fu, Patrick <patrick.fu@intel.com>
> Subject: [PATCH v1] vhost: set zmbufs to NULL when freed
> 
> From: Patrick Fu <patrick.fu@intel.com>
> 
> zmbufs should be set to NULL when getting freed to avoid double free on the
> same buffer pointer
> 
> Fixes: b0a985d1f340 ("vhost: add dequeue zero copy")
> 
> Signed-off-by: Patrick Fu <patrick.fu@intel.com>
> ---
>  lib/librte_vhost/vhost_user.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c index
> df0db8a07..9ddeae362 100644
> --- a/lib/librte_vhost/vhost_user.c
> +++ b/lib/librte_vhost/vhost_user.c
> @@ -1934,6 +1934,7 @@ free_zmbufs(struct vhost_virtqueue *vq)
>  	drain_zmbuf_list(vq);
> 
>  	rte_free(vq->zmbufs);
> +	vq->zmbufs = NULL;
>  }
> 
>  /*
> --
> 2.17.1

Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>