linux-kernel - Re: [PATCH] proc: avoid leaking eip, esp, or wchan to non-privileged processes (fwd)

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Message-ID: <20090503191124.27b3bf45@chukar>
Date:	Sun, 3 May 2009 19:11:24 -0600
From:	Jake Edge <jake@....net>
To:	James Morris <jmorris@...ei.org>
Cc:	linux-security-module@...r.kernel.org,
	Arjan van de Ven <arjan@...radead.org>,
	Eric Paris <eparis@...hat.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Roland McGrath <roland@...hat.com>, mingo@...hat.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] proc: avoid leaking eip, esp, or wchan to
 non-privileged processes (fwd)

On Mon, 4 May 2009 09:27:29 +1000 (EST) James Morris wrote:
> This patch needs some review.

Indeed.

> Note that stable@...nel.org typically backport already-reviewed and 
> applied patches.  I think security@...nel.org is for reporting
> problems in a non-public way (whereas, this is already public
> knowledge).

I realize (now :) that I didn't get this out to all of the right folks,
thanks for doing that.  I didn't realize security@...nel.org was only
for non-public security problems, though.  Maybe there needs to be a
'security maintainer' separate from that list?  Or maybe there is one
and I just didn't find that person in MAINTAINERS?

It would seem that the 'start_stack' value output by /proc/pid/stat
should also only be available to processes that can ptrace ... that was
not part of my original patch, but I think should be added ...

jake

-- 
Jake Edge - LWN - jake@....net - http://lwn.net
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