linux-kernel - Re: [PATCH 01/12] Add BSD-style securelevel support

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Date:	Mon, 9 Sep 2013 16:55:18 +0000
From:	Matthew Garrett <matthew.garrett@...ula.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"keescook@...omium.org" <keescook@...omium.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"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 01/12] Add BSD-style securelevel support

On Mon, 2013-09-09 at 09:51 -0700, H. Peter Anvin wrote:
> On 09/09/2013 09:44 AM, Matthew Garrett wrote:
> > On Mon, 2013-09-09 at 09:42 -0700, H. Peter Anvin wrote:
> > 
> >> Neither of this tend to be true long time... which leads one back to
> >> capabilities.
> > 
> > We can't use capabilities. Doing so breaks existing userspace.
> > 
> 
> Capabilities don't have to mean "POSIX capabilities"... although the
> POSIX capability system in Linux really is a massive fail which it would
> be nice to find some kind of fix for.

Designing a worthwhile capabilities interface certainly seems like a
great thing for someone to spend a few years on, but I'm not going to be
happy if it's the only way to solve this problem.

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