Re: [PATCH net v3] virtio-net: fix recursived rtnl_lock() during probe()

[Jason Wang]

On Wed, Jul 16, 2025 at 7:57 PM Zigit Zo <zuozhi...@bytedance.com> wrote:
>
> The deadlock appears in a stack trace like:
>
>   virtnet_probe()
>     rtnl_lock()
>     virtio_config_changed_work()
>       netdev_notify_peers()
>         rtnl_lock()
>
> It happens if the VMM sends a VIRTIO_NET_S_ANNOUNCE request while the
> virtio-net driver is still probing.
>
> The config_work in probe() will get scheduled until virtnet_open() enables
> the config change notification via virtio_config_driver_enable().
>
> Fixes: df28de7b0050 ("virtio-net: synchronize operstate with admin state on 
> up/down")
> Signed-off-by: Zigit Zo <zuozhi...@bytedance.com>
> ---

Acked-by: Jason Wang <jasow...@redhat.com>

Thanks