linux-kernel - Re: Security fix for remapping of page 0 (was [PATCH] Change ZERO_SIZE

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Message-ID: <alpine.DEB.1.10.0906031547090.20254@gentwo.org>
Date:	Wed, 3 Jun 2009 15:50:17 -0400 (EDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	"Larry H." <research@...reption.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-mm@...ck.org,
	Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org,
	pageexec@...email.hu
Subject: Re: Security fix for remapping of page 0 (was [PATCH] Change
 ZERO_SIZE_PTR to point at unmapped space)

On Wed, 3 Jun 2009, Linus Torvalds wrote:

> But the better option really is to just copy the cap_file_mmap() rule to
> the !SECURITY rule, and make !SECURITY really mean the same as "always do
> default security", the way it's documented.

Na, I really like the ability to just avoid having to deal with this
"security" stuff (CONFIG_SECURITY). And core security checks sidelined in
some security model config thingy? I'd prefer to see these checks right
there in core code while working on them.


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