linux-kernel - Re: [PATCH] NX protection for kernel data : fix 32 bits S3 suspend

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Message-ID: <4D599C6F.60600@zytor.com>
Date:	Mon, 14 Feb 2011 13:19:43 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	castet.matthieu@...e.fr
CC:	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	linux-security-module@...r.kernel.org,
	Matthias Hopf <mhopf@...e.de>, rjw@...k.pl,
	Andrew Morton <akpm@...ux-foundation.org>,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: Re: [PATCH] NX protection for kernel data : fix 32 bits S3 suspend

On 02/07/2011 11:59 AM, castet.matthieu@...e.fr wrote:
>
> For .39 I hope we could remove most of the RWX rights after init (This means
> make low memory trampoline NX or !RW).

By the way, I think this is the wrong goal.  I think we should have
things enabled at their lowest permission level *as early as possible*.
 The current model of tightening down permissions late in the boot is
really the wrong model.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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