linux-kernel - Re: ANN: libseccomp

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Message-ID: <1580647.pAHyaBF6MS@sifl>
Date:	Mon, 09 Apr 2012 17:32:57 -0400
From:	Paul Moore <paul@...l-moore.com>
To:	Kees Cook <keescook@...omium.org>
Cc:	libseccomp-discuss@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	Will Drewry <wad@...omium.org>
Subject: Re: ANN: libseccomp

On Monday, April 09, 2012 12:16:30 PM Kees Cook wrote:
> On Mon, Apr 9, 2012 at 11:58 AM, Paul Moore <paul@...l-moore.com> wrote:
> > With the seccomp patches finally stabilizing a bit, it seems like now is a
> > good time to announce libseccomp: a library designed to make it easier to
> > create complex, architecture independent seccomp filters.
> > 
> >  * http://sourceforge.net/projects/libseccomp/
> >  * git clone git://git.code.sf.net/p/libseccomp/libseccomp
> 
> This looks really great; nice work!

Thanks.

> I see that the arch check happens during _gen_bpf_build_bpf(), which
> is excellent. Do you have any thoughts about including a call to
> prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) by default as well?

That is a good question, and I guess it comes down to another question of if 
anyone would want to use seccomp without NO_NEW_PRIVS.  If the answer is no 
then I'm comfortable adding it into the seccomp_load() function; however, if 
the answer is yes we might want to do something different.

I haven't given much thought to this yet, so if you or anyone else feels 
strongly about the issue - either pro or con - I'd appreciate hearing the 
argument.

-- 
paul moore
www.paul-moore.com

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