linux-kernel - Re: [PATCH 1/3] Security: Add prctl(PR_{GET,SET}

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Message-ID: <20091218172054.556de51b@lxorguk.ukuu.org.uk>
Date:	Fri, 18 Dec 2009 17:20:54 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Michael Stone <michael@...top.org>
Cc:	Michael Stone <michael@...top.org>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, linux-security-module@...r.kernel.org,
	Andi Kleen <andi@...stfloor.org>, David Lang <david@...g.hm>,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Valdis Kletnieks <Valdis.Kletnieks@...edu>,
	Bryan Donlan <bdonlan@...il.com>,
	Evgeniy Polyakov <zbr@...emap.net>,
	"C. Scott Ananian" <cscott@...ott.net>,
	James Morris <jmorris@...ei.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Bernie Innocenti <bernie@...ewiz.org>,
	Mark Seaborn <mrs@...hic-beasts.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Américo Wang <xiyou.wangcong@...il.com>
Subject: Re: [PATCH 1/3] Security: Add prctl(PR_{GET,SET}_NETWORK)

> the LSM-based version *does not* resolve the situation to my satisfaction as a
> userland hacker due to the well-known and long-standing adoption and
> compositionality problems facing small LSMs. ;)

For things like Fedora it's probably an "interesting idea, perhaps we
should do it using SELinux" sort of problem, but a config option for a
magic network prctl is also going to be hard to adopt without producing a
good use case - and avoiding that by dumping crap into everyones kernel
fast paths isn't a good idea either.

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