linux-kernel - Re: [PATCH] sysctl: fix restrict write access to dmesg

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Message-Id: <20120330175525.eaef1ece.akpm@linux-foundation.org>
Date:	Fri, 30 Mar 2012 17:55:25 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Richard Weinberger <richard@....at>
Cc:	Phillip Lougher <plougher@...hat.com>,
	linux-kernel@...r.kernel.org,
	Dan Rosenberg <drosenberg@...curity.com>,
	"Serge E. Hallyn" <serge@...lyn.com>, Eugene Teo <eteo@...hat.com>,
	Eric Paris <eparis@...hat.com>,
	James Morris <jmorris@...ei.org>,
	Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH] sysctl: fix restrict write access to dmesg_restrict

On Sat, 31 Mar 2012 01:50:52 +0200 Richard Weinberger <richard@....at> wrote:

> Am 31.03.2012 01:43, schrieb Phillip Lougher:
> > Commit bfdc0b4 adds code to restrict access to dmesg_restrict,
> > however, it incorrectly alters kptr_restrict rather than
> > dmesg_restrict.
> > 
> > The original patch from Richard Weinberger
> > (https://lkml.org/lkml/2011/3/14/362) alters dmesg_restrict as
> > expected, and so the patch seems to have been misapplied.
> > 
> 
> Hmm, indeed.
> Any idea how this could happen, Andrew?

Presumably someone else fiddled with the file, patch(1) misapplied the
hunk and I didn't notice.

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