From owner-freebsd-hackers@FreeBSD.ORG  Sat May  9 12:13:15 2009
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 007A3106566C
	for <freebsd-hackers@freebsd.org>; Sat,  9 May 2009 12:13:15 +0000 (UTC)
	(envelope-from ed@hoeg.nl)
Received: from palm.hoeg.nl (mx0.hoeg.nl [IPv6:2001:7b8:613:100::211])
	by mx1.freebsd.org (Postfix) with ESMTP id 8FEC38FC0C
	for <freebsd-hackers@freebsd.org>; Sat,  9 May 2009 12:13:14 +0000 (UTC)
	(envelope-from ed@hoeg.nl)
Received: by palm.hoeg.nl (Postfix, from userid 1000)
	id AC2501CDE9; Sat,  9 May 2009 14:13:13 +0200 (CEST)
Date: Sat, 9 May 2009 14:13:13 +0200
From: Ed Schouten <ed@80386.nl>
To: Lars Engels <lars.engels@0x20.net>
Message-ID: <20090509121313.GA58540@hoeg.nl>
References: <a0806f900905050107u4cbf0624oc83aafa54ae651f0@mail.gmail.com>
	<d9f479c10905050239u5d6d8304y1f63e41eabee8624@mail.gmail.com>
	<20090508214117.GY58540@hoeg.nl>
	<20090509113459.GD56667@e.0x20.net>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha1;
	protocol="application/pgp-signature"; boundary="c9D8mOo1KWOdrF7C"
Content-Disposition: inline
In-Reply-To: <20090509113459.GD56667@e.0x20.net>
User-Agent: Mutt/1.5.19 (2009-01-05)
Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org>, jt@0xabadba.be,
	vasanth raonaik <vasanth.raonaik@gmail.com>
Subject: Re: concurrent sysctl implementation
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 09 May 2009 12:13:15 -0000


--c9D8mOo1KWOdrF7C
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

Hi Lars,

* Lars Engels <lars.engels@0x20.net> wrote:
> Why is sysctl used to get a random number? Can't we get a different
> source for it?

We probably could. I think I discussed this with Robert Watson some time
ago and we could use things like ELF hints. But still, that doesn't
prevent us from reaching this limitation later on.

I think other people (Rink Springer) also reported this issue years ago,
even before we had the stack protector enabled.

--=20
 Ed Schouten <ed@80386.nl>
 WWW: http://80386.nl/

--c9D8mOo1KWOdrF7C
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (FreeBSD)

iEYEARECAAYFAkoFc1kACgkQ52SDGA2eCwWG6wCeLTizCGSrJjio+5gmA36IEvhw
LSIAn1KhfYdQDqqNnaiX04vCYA3Sl3pa
=yid8
-----END PGP SIGNATURE-----

--c9D8mOo1KWOdrF7C--