linux-kernel - Re: A basic question about the security

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Date:	Thu, 24 Dec 2009 19:57:52 +0100
From:	Samir Bellabes <sam@...ack.fr>
To:	Evgeniy Polyakov <zbr@...emap.net>
Cc:	Michael Stone <michael@...top.org>, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	Andi Kleen <andi@...stfloor.org>, David Lang <david@...g.hm>,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Valdis Kletnieks <Valdis.Kletnieks@...edu>,
	Bryan Donlan <bdonlan@...il.com>,
	"C. Scott Ananian" <cscott@...ott.net>,
	James Morris <jmorris@...ei.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Bernie Innocenti <bernie@...ewiz.org>,
	Mark Seaborn <mrs@...hic-beasts.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Américo Wang <xiyou.wangcong@...il.com>
Subject: Re: A basic question about the security_* hooks

Evgeniy Polyakov <zbr@...emap.net> writes:

> I believe you should convice selinux and friends to add support for your
> extension, otherwise no distribution will be able to turn it on, since
> no two security frameworks can be registered simultaneously.

I agree, as a LSM module, this purpose is a no sense, because it will
avoid using another security module.
On the other hand, adding this capacity directly to the syscalls seems
to be a little bit ugly (it reminds me security post_accept hook
strategy of returning or not a value). 

But the way to go is to add this directly to existing security models,
if it make sens for them.

sam
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