linux-kernel - Re: [PATCH] intel_txt: add s3 userspace memory integrity verification

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Message-ID: <20091004232639.GQ1656@one.firstfloor.org>
Date:	Mon, 5 Oct 2009 01:26:39 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Pavel Machek <pavel@....cz>
Cc:	Shane Wang <shane.wang@...el.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	"Cihula, Joseph" <joseph.cihula@...el.com>,
	"arjan@...ux.intel.com" <arjan@...ux.intel.com>,
	"andi@...stfloor.org" <andi@...stfloor.org>,
	"chrisw@...s-sol.org" <chrisw@...s-sol.org>,
	"jmorris@...ei.org" <jmorris@...ei.org>,
	"jbeulich@...ell.com" <jbeulich@...ell.com>,
	"peterm@...hat.com" <peterm@...hat.com>
Subject: Re: [PATCH] intel_txt: add s3 userspace memory integrity verification

> So I corrupt memory, but also corrupt tboot_enabled() to return 0....
> 
> And... does panic kill the machine quickly enough that no 'bad stuff'
> happens? (Whats bad stuff in this context, anyway?).

panic has notifiers, so indeed someone could put arbitary code into panic.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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