linux-kernel - Re: [PATCH 00/12] One more attempt at useful kernel lockdown

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Date:	Mon, 9 Sep 2013 19:08:16 +0000
From:	Matthew Garrett <matthew.garrett@...ula.com>
To:	"Valdis.Kletnieks@...edu" <Valdis.Kletnieks@...edu>
CC:	David Lang <david@...g.hm>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"keescook@...omium.org" <keescook@...omium.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"hpa@...or.com" <hpa@...or.com>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	"jmorris@...ei.org" <jmorris@...ei.org>,
	"linux-security-module@...r.kernel.org" 
	<linux-security-module@...r.kernel.org>
Subject: Re: [PATCH 00/12] One more attempt at useful kernel lockdown

On Mon, 2013-09-09 at 15:01 -0400, Valdis.Kletnieks@...edu wrote:
> On Mon, 09 Sep 2013 11:25:38 -0700, David Lang said:
> 
> > Given that we know that people want signed binaries without blocking kexec, you
> > should have '1' just enforce module signing and '2' (or higher) implement a full
> > lockdown including kexec.
> 
> > Or, eliminate the -1  permanently insecure option and make this a bitmask, if
> > someone wants to enable every possible lockdown, have them set it to "all 1's",
> > define the bits only as you need them.
> 
> This strikes me as much more workable than one big sledgehammer.

Which combinations are you envisioning as being useful?

-- 
Matthew Garrett <matthew.garrett@...ula.com>