linux-kernel - Re: group ownership of tun devices -- nonfunctional?

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Message-ID: <46C86B6C.8090209@home.nl>
Date:	Sun, 19 Aug 2007 18:10:20 +0200
From:	Rene Herman <rene.herman@...e.nl>
To:	7eggert@....de
CC:	Mike Mohr <akihana@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: group ownership of tun devices -- nonfunctional?

On 08/19/2007 06:05 PM, Bodo Eggert wrote:

> IMHO the check is broken:
> 
> +               if (((tun->owner != -1 &&
> +                     current->euid != tun->owner) ||
> +                    (tun->group != -1 &&
> +                     current->egid != tun->group)) &&
> +                    !capable(CAP_NET_ADMIN))
>                         return -EPERM;
> 
> It should be something like:
> 
> +               if (!((tun->owner == tun->owner) ||
> +                     (tun->group == tun->group) ||

???

> +                     capable(CAP_NET_ADMIN)))
>                         return -EPERM;
> 
> Please verify and forward to the maintainers if my guess appears to be correct.

Rene.
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