From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Robert Love <rml@tech9.net>
Cc: Nick LeRoy <nleroy@cs.wisc.edu>,
Linux Kernel List <linux-kernel@vger.kernel.org>
Subject: Re: Detecting threads vs processes with ps or /proc
Date: 09 Dec 2002 08:27:33 -0800 [thread overview]
Message-ID: <1039451252.5905.866.camel@ixodes.goop.org> (raw)
In-Reply-To: <1039205353.1943.2191.camel@phantasy>
On Fri, 2002-12-06 at 12:09, Robert Love wrote:
> One thing to note: if you can modify the kernel and procps, you can just
> export the value of task->mm out of /proc. It is a gross hack, and
> perhaps a security issue, but that will work 100%. Same ->mm implies
> thread.
It isn't a terribly gross hack. I have a patch (somewhere...) which
adds an ASID: field to /proc/<pid>/status, which simply contains the mm
pointer (as an opaque identifier token). If you were worried about
exposing (yet another) kernel pointer value, I suppose you could mush it
about a bit, but I think that would give the illusion of obscurity
rather than any actual increase in security.
J
next prev parent reply other threads:[~2002-12-09 16:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-06 15:24 Detecting threads vs processes with ps or /proc Nick LeRoy
2002-12-06 19:48 ` Robert Love
2002-12-06 19:56 ` Nick LeRoy
2002-12-06 20:09 ` Robert Love
2002-12-09 16:27 ` Jeremy Fitzhardinge [this message]
2002-12-08 12:24 ` Gilad Ben-Yossef
-- strict thread matches above, loose matches on Subject: below --
2002-12-09 0:24 Albert D. Cahalan
2002-12-09 3:18 ` Nick LeRoy
2002-12-09 3:47 ` Robert Love
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