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

[Ferruh Yigit]

On 11/9/2020 5:09 AM, Jiang, YuX wrote:
> Tested-by: JiangYuX <yux.jiang at intel.com>
> 

Please don't top post.

Also tag should be: "Tested-by: Yu Jiang <yux.jiang at intel.com>"

> 
>> -----Original Message-----
>> From: Maxime Coquelin [mailto:maxime.coquelin at redhat.com]
>> Sent: Friday, November 6, 2020 10:48 PM
>> To: dev at dpdk.org; Xia, Chenbo <chenbo.xia at intel.com>;
>> amorenoz at redhat.com
>> Cc: stable at dpdk.org; Maxime Coquelin <maxime.coquelin at redhat.com>;
>> Jiang, YuX <yux.jiang at intel.com>
>> Subject: [PATCH] vhost: fix virtqueue initialization
>>
>> 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
>>
>> 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;
>> --
>> 2.26.2
>