linux-kernel - Re: [PATCH 3/3 V13] RO/NX protection for loadable kernel

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Date:	Thu, 23 Dec 2010 20:43:50 -0500
From:	Valdis.Kletnieks@...edu
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Ingo Molnar <mingo@...e.hu>, mat <castet.matthieu@...e.fr>,
	Kees Cook <kees.cook@...onical.com>,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, linux-next@...r.kernel.org,
	Arjan van de Ven <arjan@...radead.org>,
	James Morris <jmorris@...ei.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <ak@....de>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Dave Jones <davej@...hat.com>,
	Siarhei Liakh <sliakh.lkml@...il.com>
Subject: Re: [PATCH 3/3 V13] RO/NX protection for loadable kernel

On Thu, 23 Dec 2010 10:01:48 EST, Steven Rostedt said:
> On Wed, 2010-12-22 at 16:35 -0500, Valdis.Kletnieks@...edu wrote:
> 
> > Steve Rostedt's patch that moves the setting of the page permissions seems to
> > make this patch no longer necessary.  I tripped over this same issue, but the
> > version in the latest -mmotm does not need it, as it includes Steve's fix.
> 
> Can I add your "Tested-by: ..." to the commit?

Sure.  I can verify that the patch series (a) doesn't break well-behaved
modules and (b) it *does* trigger for misbehaving modules (I sent the
VirtualBox crew a bug report for a module that tried to write to an area
marked executable).


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