[dpdk-stable] [dpdk-dev] [PATCH] vhost: fix virtqueue initialization

[Ferruh Yigit]

On 11/6/2020 2:47 PM, Maxime Coquelin wrote:
> This patches fixes virtqueue initialization issue causing
> segfault or file descriptor being closed unexpectedly.
> 
> The wrong index was passed to init_vring_queue() by
> alloc_vring_queue() when a hole in the virtqueue array was
> met.
> 
> Fixes: 8acd7c213353 ("vhost: fix virtqueues metadata allocation")
> Cc: stable at dpdk.org
> 

Since the issue is introduced in this release, there is nothing to backport and 
stable tag is not required, removing it in next-net.

> Reported-by: Yu Jiang <yux.jiang at intel.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
> ---
>   lib/librte_vhost/vhost.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
> index 8a151a9c1d..b83cf639eb 100644
> --- a/lib/librte_vhost/vhost.c
> +++ b/lib/librte_vhost/vhost.c
> @@ -605,7 +605,7 @@ alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx)
>   		}
>   
>   		dev->virtqueue[i] = vq;
> -		init_vring_queue(dev, vring_idx);
> +		init_vring_queue(dev, i);
>   		rte_spinlock_init(&vq->access_lock);
>   		vq->avail_wrap_counter = 1;
>   		vq->used_wrap_counter = 1;
>