linux-kernel - Re: [PATCH] proc: add "personality" to process status file

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Message-ID: <20081004220220.GK10632@outflux.net>
Date:	Sat, 4 Oct 2008 15:02:20 -0700
From:	Kees Cook <kees.cook@...onical.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] proc: add "personality" to process status file

On Sat, Oct 04, 2008 at 02:51:49PM -0700, Arjan van de Ven wrote:
> On Thu, 2 Oct 2008 14:14:24 -0700
> Kees Cook <kees.cook@...onical.com> wrote:
> 
> > There is no sane way to query the personality flags of arbitrary
> > process from userspace.  This adds the flags to the /proc/$pid/status
> > file. For example, to detect READ_IMPLIES_EXEC:
> > 
> 
> .. I'm sure local exploit writers will love this to find out which
> processes to attack.
> Realistically, this probably shouldn't be in a world-readable file.

Nothing else seemed appropriate, but I could make a brand new proc file,
if that's sensible.  "status_private" ?

-Kees

-- 
Kees Cook
Ubuntu Security Team
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