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

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Date:	Sat, 26 Dec 2009 19:33:29 -0500
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	"Serge E. Hallyn" <serue@...ibm.com>
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>, Va@...per.es
Subject: Re: A basic question about the security_* hooks

On Thu, 2009-12-24 at 23:50 -0600, Serge E. Hallyn wrote:

<snip>

> Well, taking a step back - what exactly is the motivation for making this
> an LSM?  Is it just to re-use the callsites?  Or to provide a way to turn
> off the functionality?  I ask bc the API is in the prctl code, so the LSM
> is conceptually always there, which is different from other LSMs.
> 
> So if you (or your audience) really want this to be an LSM, then you should
> probably put your prctl code in a security_task_prctl() hook.  Otherwise,
> perhaps we should just explicitly call your hooks in wrappers - or whatever was
> finally decided should be done with the security/integrity/ima hooks.
> 
> -serge

Any place that a security hook and the IMA call co-existed, the IMA call
was moved to the security_ hook (security/security.c).

Mimi

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