linux-kernel - Re: mmap_min_addr and your local LSM (ok, just SELinux)

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Message-ID: <20090720204848.5f37c92a@infradead.org>
Date:	Mon, 20 Jul 2009 20:48:48 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Eric Paris <eparis@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, selinux@...ho.nsa.gov,
	sds@...ho.nsa.gov, jmorris@...ei.org, spender@...ecurity.net,
	dwalsh@...hat.com, cl@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk
Subject: Re: mmap_min_addr and your local LSM (ok, just SELinux)

On Mon, 20 Jul 2009 19:23:43 -0400
Eric Paris <eparis@...hat.com> wrote:
> 
> Does anyone see a better way to let users continue to be users while
> protecting most people?  Yes SELinux is stronger in some areas than
> without confining the ability to map the 0 page, but as has be rightly
> pointed out it's foolish an broken that SELinux can weaken any
> protections.

one option is to allow the page to be mapped, but only as
non-executable... in DOS that memory isn't where code lives anyway...


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
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