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Message-ID: <871uihnecw.fsf@xmission.com>
Date:	Wed, 05 Sep 2012 00:00:31 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, linux-efi@...r.kernel.org
Subject: Re: [PATCH 07/11] kexec: Disable in a secure boot environment

Matthew Garrett <mjg59@...f.ucam.org> writes:

> On Tue, Sep 04, 2012 at 09:33:31PM -0700, Eric W. Biederman wrote:
>> Matthew Garrett <mjg59@...f.ucam.org> writes:
>> > The full implementation should trust keys that are trusted by the 
>> > platform, so it'd boot any kexec image you cared to sign. Or simply 
>> > patch this code out and rebuild and self-sign, or disable the code that 
>> > turns off the capability when in secure boot mode. I've no objection to 
>> > putting that behind an #ifdef.
>> 
>> I will be happy to see a version of kexec that accepts signed images,
>> allowing the functionality to work in your brave new world where
>> everything must be signed.
>> 
>> Until then I don't see a point in merging anything else.
>
> Fine. We'll just carry this one out of tree for now.

It is your tree.

I am disappointed to learn that you aren't enthusiastic about
implementing verification of signatures for all code that goes into
ring 0.

Eric


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