linux-kernel - Re: [PATCH 0/6] kexec: A new system call to allow in kernel loading

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Message-ID: <alpine.LNX.2.00.1311221449120.22082@pobox.suse.cz>
Date:	Fri, 22 Nov 2013 14:50:43 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	kexec@...ts.infradead.org, "H. Peter Anvin" <hpa@...or.com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Greg Kroah-Hartman <greg@...ah.com>
Subject: Re: [PATCH 0/6] kexec: A new system call to allow in kernel
 loading

On Fri, 22 Nov 2013, Vivek Goyal wrote:

> > OTOH, does this feature make any sense whatsover on architectures that 
> > don't support secure boot anyway?
> 
> I guess if signed modules makes sense, then being able to kexec signed
> kernel images should make sense too, in general.

Well, that's really a grey zone, I'd say.

In a non-secureboot environment, if you are root, you are able to issue 
reboot into a completely different, self-made kernel anyway, independent 
on whether signed modules are used or not.

-- 
Jiri Kosina
SUSE Labs
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