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

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Message-Id: <201102142350.04053.rjw@sisk.pl>
Date:	Mon, 14 Feb 2011 23:50:03 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	castet.matthieu@...e.fr, Ingo Molnar <mingo@...e.hu>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	linux-security-module@...r.kernel.org,
	Matthias Hopf <mhopf@...e.de>,
	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 Monday, February 14, 2011, H. Peter Anvin wrote:
> 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.

FWIW, I agree.

Rafael
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