linux-kernel - Re: [RFC,PATCH 1/2] seccomp_filters: system call filtering using BPF

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Message-ID: <CABqD9hYAnU+3GuXG_G+ywm=vAFgYtE0qHBgHzrNUqR27NgDk=Q@mail.gmail.com>
Date:	Thu, 12 Jan 2012 11:52:59 -0600
From:	Will Drewry <wad@...omium.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	linux-kernel@...r.kernel.org, keescook@...omium.org,
	john.johansen@...onical.com, serge.hallyn@...onical.com,
	coreyb@...ux.vnet.ibm.com, pmoore@...hat.com, eparis@...hat.com,
	djm@...drot.org, torvalds@...ux-foundation.org,
	segoon@...nwall.com, rostedt@...dmis.org, jmorris@...ei.org,
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	viro@...iv.linux.org.uk, luto@....edu, mingo@...e.hu,
	akpm@...ux-foundation.org, khilman@...com, borislav.petkov@....com,
	amwang@...hat.com, oleg@...hat.com, ak@...ux.intel.com,
	eric.dumazet@...il.com, gregkh@...e.de, dhowells@...hat.com,
	daniel.lezcano@...e.fr, linux-fsdevel@...r.kernel.org,
	linux-security-module@...r.kernel.org, olofj@...omium.org,
	mhalcrow@...gle.com, dlaor@...hat.com
Subject: Re: [RFC,PATCH 1/2] seccomp_filters: system call filtering using BPF

On Thu, Jan 12, 2012 at 11:11 AM, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
>> more about).  Since setuid is privilege escalation, then perhaps it
>> makes sense to allow it as an escape hatch.
>>
>> Would it be sane to just disallow setuid exec exclusively?
>
> I think that is a policy question. I can imagine cases where either
> behaviour is the "right" one so it may need to be a parameter ?

Makes sense. I'll make it flaggable (ignoring the parallel conversation
about having a thread-wide suidable bit).

thanks!
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