linux-kernel - Re: [PATCH] ptrace: allow restriction of ptrace scope

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Message-ID: <20100617215349.2fac02f5@lxorguk.ukuu.org.uk>
Date:	Thu, 17 Jun 2010 21:53:49 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Kees Cook <kees.cook@...onical.com>
Cc:	James Morris <jmorris@...ei.org>, linux-kernel@...r.kernel.org,
	Randy Dunlap <rdunlap@...otime.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jiri Kosina <jkosina@...e.cz>,
	Dave Young <hidave.darkstar@...il.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Roland McGrath <roland@...hat.com>,
	Oleg Nesterov <oleg@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	David Howells <dhowells@...hat.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-doc@...r.kernel.org, Stephen Smalley <sds@...ho.nsa.gov>,
	Daniel J Walsh <dwalsh@...hat.com>,
	linux-security-module@...r.kernel.org
Subject: Re: [PATCH] ptrace: allow restriction of ptrace scope

> > SELinux users would not need the other LSM, and stacking is thus not 
> > required.
> 
> But if a user wants to disable ptrace using the SELinux LSM and then
> also disable sticky-symlinks via the ItsHideous LSM, they're out of luck.

Thats a nonsensical configuration so we don't care. If you are using
SELinux you just do it via SELinux. If you are doing it via
UbuntuHasToBeDifferent then you do it via that.

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