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

[Maxime Coquelin]

Do you agree with below title?
vhost: fix double-free with zero-copy

Thanks,
Maxime

On 7/15/20 5:58 PM, patrick.fu at intel.com wrote:
> From: Patrick Fu <patrick.fu at 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 at 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;
>  }
>  
>  /*
>