linux-kernel - Re: [PATCH] security: kill security_task_fix

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Message-ID: <alpine.LRH.2.02.1205311841530.26474@tundra.namei.org>
Date:	Thu, 31 May 2012 18:42:20 +1000 (EST)
From:	James Morris <jmorris@...ei.org>
To:	kosaki.motohiro@...il.com
cc:	linux-kernel@...r.kernel.org,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Vasiliy Kulikov <segoon@...nwall.com>,
	Chris Wright <chrisw@...s-sol.org>,
	James Morris <james.l.morris@...cle.com>,
	linux-security-module@...r.kernel.org,
	Serge Hallyn <serge.hallyn@...onical.com>
Subject: Re: [PATCH] security: kill security_task_fix_setuid()

On Thu, 31 May 2012, kosaki.motohiro@...il.com wrote:

> From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> 
> commit 72fa5997 (move RLIMIT_NPROC check from set_user() to do_execve_common())
> pointed out set*uid() failure can cause a security problem.
> Thus, security_task_fix_setuid() potentially has the same issue. Any security
> module shouldn't use it. This patch kills it completely.
> 
> Luckily, any security module don't use it. then, this patch doesn't make any
> userland visible change.

Capabilities uses it.


-- 
James Morris
<jmorris@...ei.org>
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