linux-kernel - Re: Kdump with signed images

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Message-ID: <20121101145731.GB10662@srcf.ucam.org>
Date:	Thu, 1 Nov 2012 14:57:31 +0000
From:	Matthew Garrett <mjg@...hat.com>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Khalid Aziz <khalid@...ehiking.org>, kexec@...ts.infradead.org,
	horms@...ge.net.au, Dave Young <dyoung@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Dmitry Kasatkin <dmitry.kasatkin@...el.com>,
	Roberto Sassu <roberto.sassu@...ito.it>,
	Kees Cook <keescook@...omium.org>
Subject: Re: Kdump with signed images

On Thu, Nov 01, 2012 at 10:51:49AM -0400, Vivek Goyal wrote:

> And if one wants only /sbin/kexec to call it, then just sign that
> one so no other executable will be able to call kexec_load(). Though
> I don't think that's the requirement here. Requirement is that only
> trusted executables should be able to call kexec_load().

Where "trusted executables" means "signed by a key that's present in the 
system firmware or in the kernel that's signed with a key that's present 
in the system firmware", sure.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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