linux-kernel - Re: [PATCH] x86: Lock down MSR writing in secure boot

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Message-ID: <1360803872.18083.46.camel@x230.lan>
Date:	Thu, 14 Feb 2013 01:04:33 +0000
From:	Matthew Garrett <matthew.garrett@...ula.com>
To:	Casey Schaufler <casey@...aufler-ca.com>
CC:	"H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...en8.de>,
	Kees Cook <keescook@...omium.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	linux-security-module <linux-security-module@...r.kernel.org>
Subject: Re: [PATCH] x86: Lock down MSR writing in secure boot

On Wed, 2013-02-13 at 16:44 -0800, Casey Schaufler wrote:

> If you want that sort of granularity throw yourself on the SELinux
> bandwagon. Fine grained capabilities are insane and unmanageable
> and will only lead to tears. Security is despised because of the
> notion that making systems impossible to use is a good thing.

SELinux is completely unusable for this specific case.

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