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

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Message-ID: <20121031170334.59833fb1@pyramind.ukuu.org.uk>
Date:	Wed, 31 Oct 2012 17:03:34 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Josh Boyer <jwboyer@...il.com>, Matthew Garrett <mjg@...hat.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 16:55:04 +0100 (CET)
Jiri Kosina <jkosina@...e.cz> wrote:

> On Wed, 31 Oct 2012, Alan Cox wrote:
> 
> > All this depends on your threat model. If I have physical access to
> > suspend/resume your machine then you already lost. If I don't have
> > physical access then I can't boot my unsigned OS to patch your S4 image
> > so it doesn't matter.
> 
> 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.

Alan
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