linux-kernel - Re: Trusted kernel patchset for Secure Boot lockdown

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Date:	Thu, 13 Mar 2014 14:28:01 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Matthew Garrett <matthew.garrett@...ula.com>
CC:	"jmorris@...ei.org" <jmorris@...ei.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"keescook@...omium.org" <keescook@...omium.org>,
	"linux-security-module@...r.kernel.org" 
	<linux-security-module@...r.kernel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"jwboyer@...oraproject.org" <jwboyer@...oraproject.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
Subject: Re: Trusted kernel patchset for Secure Boot lockdown

On 03/13/2014 02:24 PM, One Thousand Gnomes wrote:
> 
> If I have CAP_SYS_RAWIO I can make arbitary ring 0 calls from userspace,
> trivially and in a fashion well known and documented.
> 

... and once we eliminate CAP_SYS_RAWIO a bunch of the patches become
redundant.

	-hpa

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