linux-kernel - Re: [PATCH] tty: n_gsm: require CAP_NET_ADMIN to attach N

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Message-ID: <ZMkCWL4r9Z35j3hC@quatroqueijos.cascardo.eti.br>
Date:   Tue, 1 Aug 2023 10:02:16 -0300
From:   Thadeu Lima de Souza Cascardo <cascardo@...onical.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiri Slaby <jirislaby@...nel.org>
Subject: Re: [PATCH] tty: n_gsm: require CAP_NET_ADMIN to attach N_GSM0710
 ldisc

On Tue, Aug 01, 2023 at 06:53:30AM +0200, Greg Kroah-Hartman wrote:
> On Mon, Jul 31, 2023 at 03:59:42PM -0300, Thadeu Lima de Souza Cascardo wrote:
> > Any unprivileged user can attach N_GSM0710 ldisc, but it requires
> > CAP_NET_ADMIN to create a GSM network anyway.
> > 
> > Require initial namespace CAP_NET_ADMIN to do that.
> > 
> > Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@...onical.com>
> 
> What commit id does this fix?  Or has this always been a problem?
> 
> thanks,
> 
> greg k-h

This has always been like this. It is not really fixing a specific commit, but
introducing further restriction on access.

Cascardo.