Re: [dpdk-dev] [PATCH v2] net/virtio-user: fix run close(0) and close callfd

[Maxime Coquelin <maxime.coquelin@redhat.com>]

Cc'ing stable@dpdk.org.

On 12/11/20 6:11 PM, Jiawei Zhu wrote:
> From: Jiawei Zhu <zhujiawei12@huawei.com>
> 
> When i < VIRTIO_MAX_VIRTQUEUES and j == i,
> dev->callfds[i] and dev->kickfds[i] are default 0.
> So it will close(0), close the standard input (stdin).
> And when the code fails in kickfd creation,
> it will leaves one callfd not closed.
> 
> Fixes: e6e7ad8b3024 ("net/virtio-user: move eventfd open/close into init/uninit")
> Cc: stable@dpdk.org:
> 
> Signed-off-by: Jiawei Zhu <zhujiawei12@huawei.com>
> ---
> v2:
> * Add close callfd when fail in kickfd creation before break.
> ---
> ---
>  drivers/net/virtio/virtio_user/virtio_user_dev.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> index 053f026..e1cbad0 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> @@ -276,6 +276,7 @@ int virtio_user_stop_device(struct virtio_user_dev *dev)
>  		}
>  		kickfd = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
>  		if (kickfd < 0) {
> +			close(callfd);
>  			PMD_DRV_LOG(ERR, "kickfd error, %s", strerror(errno));
>  			break;
>  		}
> @@ -284,7 +285,7 @@ int virtio_user_stop_device(struct virtio_user_dev *dev)
>  	}
>  
>  	if (i < VIRTIO_MAX_VIRTQUEUES) {
> -		for (j = 0; j <= i; ++j) {
> +		for (j = 0; j < i; ++j) {
>  			close(dev->callfds[j]);
>  			close(dev->kickfds[j]);
>  		}
> 


Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

Thanks!
Maxime