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Date: Mon, 12 Sep 2011 19:06:30 +0400
From: Cyrill Gorcunov <gorcunov@...il.com>
To: Vasiliy Kulikov <segoon@...nwall.com>
Cc: kernel-hardening@...ts.openwall.com,
Andrew Morton <akpm@...ux-foundation.org>,
Al Viro <viro@...iv.linux.org.uk>,
Christoph Lameter <cl@...ux-foundation.org>,
Pekka Enberg <penberg@...nel.org>, Matt Mackall <mpm@...enic.com>,
linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [RFC PATCH 2/2] mm: restrict access to /proc/slabinfo
On Sat, Sep 10, 2011 at 08:41:34PM +0400, Vasiliy Kulikov wrote:
> Historically /proc/slabinfo has 0444 permissions and is accessible to
> the world. slabinfo contains rather private information related both to
> the kernel and userspace tasks. Depending on the situation, it might
> reveal either private information per se or information useful to make
> another targeted attack. Some examples of what can be learned by
> reading/watching for /proc/slabinfo entries:
>
...
Since this file is controversy point, probably its permissions might be
configurable via setup option?
Cyrill
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