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

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Message-ID: <20121031172121.14cc1215@pyramind.ukuu.org.uk>
Date:	Wed, 31 Oct 2012 17:21:21 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Jiri Kosina <jkosina@...e.cz>, 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 17:10:48 +0000
Matthew Garrett <mjg59@...f.ucam.org> wrote:

> On Wed, Oct 31, 2012 at 05:03:34PM +0000, Alan Cox wrote:
> > On Wed, 31 Oct 2012 16:55:04 +0100 (CET)
> > Jiri Kosina <jkosina@...e.cz> 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 ?
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