linux-kernel - Re: [PATCH] sysctl selinux: Don't look at table->de

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Message-Id: <200701301028.56693.russell@coker.com.au>
Date:	Tue, 30 Jan 2007 10:28:51 +1100
From:	Russell Coker <russell@...er.com.au>
To:	Stephen Smalley <sds@...ho.nsa.gov>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andrew Morton <akpm@...l.org>, Ingo Molnar <mingo@...e.hu>,
	tglx@...utronix.de, linux-kernel@...r.kernel.org,
	selinux@...ho.nsa.gov, jmorris@...ei.org
Subject: Re: [PATCH] sysctl selinux: Don't look at table->de

On Tuesday 30 January 2007 05:43, Stephen Smalley <sds@...ho.nsa.gov> wrote:
> True, but a system that disables proc is likely a system with a custom
> policy anyway,

In practice we have to extensively customise policy long before getting to the 
non-proc stage of optimising for small hardware.  The Familiar distribution 
(used on the iPaQ) has /proc but needs significant policy changes when 
compared to a typical Fedora workstation.  Not only is there the issue that 
embedded distributions have different daemons and path names to workstations, 
but the memory constraints mean that even a modular targeted policy is not as 
small as you desire.

> and dependency on proc is fairly basic to selinux these 
> days (due to reliance on /proc/self/attr for process attribute
> manipulation in place of the old selinux syscalls).  Possibly we should
> just make selinux depend on proc and drop the #ifdef there.

I think that is the correct thing to do.  Someone who is prepared to do all 
the work needed to get a recent SE Linux system operating without /proc will 
have no problem changing the kernel config scripts and everyone else would be 
better off not being confused by being offered sets of options that are not 
viable.

-- 
russell@...er.com.au
http://etbe.blogspot.com/          My Blog

http://www.coker.com.au/sponsorship.html Sponsoring Free Software development

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