linux-kernel - Re: [RFC] Second attempt at kernel secure boot support

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Message-ID: <alpine.LNX.2.00.1210311821150.22374@pobox.suse.cz>
Date:	Wed, 31 Oct 2012 18:21:39 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	Josh Boyer <jwboyer@...il.com>, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, linux-efi@...r.kernel.org
Subject: Re: [RFC] Second attempt at kernel secure boot support

On Wed, 31 Oct 2012, Alan Cox wrote:

> > > > Prepare (as a root) a hand-crafted image, reboot, let the kernel resume 
> > > > from that artificial image.
> > > 
> > > It's not signed. It won't reboot from that image.
> > 
> > The kernel is signed. The kernel doesn't check the signature on the 
> > suspend image.
> 
> Which doesn't matter. How are you going to create the tampered image in
> the first place ?

Editing the suspend partition/file directly when trusted kernel is booted.

-- 
Jiri Kosina
SUSE Labs
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