linux-kernel - Re: Kdump with signed images

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Date:	Fri, 26 Oct 2012 14:25:54 -0400
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	Matthew Garrett <mjg@...hat.com>
Cc:	Vivek Goyal <vgoyal@...hat.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 Fri, 2012-10-26 at 19:19 +0100, Matthew Garrett wrote:
> On Fri, Oct 26, 2012 at 01:59:34PM -0400, Mimi Zohar wrote:
> > On Fri, 2012-10-26 at 03:39 +0100, Matthew Garrett wrote:
> > > and it must be impossible for anything other than 
> > > /sbin/kexec to make the kexec system call.
> > 
> > Permission is a MAC issue. :)
> 
> It's a MAC issue that has to be implemented in the kernel. We can't 
> depend on userspace loading any kind of policy.

Still a MAC issue, that problably could be addressed by capabilities.  I
suggest you post this issue on the LSM mailing list.  Please cc: Serge,
as the capabilities maintainer.

thanks,

Mimi

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