Re: [PATCH] net: tuntap: Fix tun_net_fix_features()

["Michael S. Tsirkin" <mst@redhat.com>]

On Tue, May 17, 2011 at 10:19:54AM +0200, Michał Mirosław wrote:
> tun->set_features are meant to limit not force the features.
> 
> Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>

Not sure when I'll find the time to test this but
just looking at the code, the patch makes sense
to me. So:

Acked-by: Michael S. Tsirkin <mst@redhat.com>

We probably want this in -stable too?

> ---
>  drivers/net/tun.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/net/tun.c b/drivers/net/tun.c
> index 74e9405..f77c6d0 100644
> --- a/drivers/net/tun.c
> +++ b/drivers/net/tun.c
> @@ -458,7 +458,7 @@ static u32 tun_net_fix_features(struct net_device *dev, u32 features)
>  {
>  	struct tun_struct *tun = netdev_priv(dev);
>  
> -	return (features & tun->set_features) | (features & ~TUN_USER_FEATURES);
> +	return features & (tun->set_features | ~TUN_USER_FEATURES);
>  }
>  
>  static const struct net_device_ops tun_netdev_ops = {
> -- 
> 1.7.2.5