From owner-freebsd-current@FreeBSD.ORG  Fri Jan 13 20:45:57 2006
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
X-Original-To: freebsd-current@freebsd.org
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 778FC16A41F;
	Fri, 13 Jan 2006 20:45:57 +0000 (GMT)
	(envelope-from keramida@ceid.upatras.gr)
Received: from aiolos.otenet.gr (aiolos.otenet.gr [195.170.0.93])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 1DC9643D45;
	Fri, 13 Jan 2006 20:45:55 +0000 (GMT)
	(envelope-from keramida@ceid.upatras.gr)
Received: from flame.pc (aris.bedc.ondsl.gr [62.103.39.226])
	by aiolos.otenet.gr (8.13.4/8.13.4/Debian-8) with SMTP id
	k0DKjq5d011606; Fri, 13 Jan 2006 22:45:53 +0200
Received: by flame.pc (Postfix, from userid 1001)
	id 93A3911781; Fri, 13 Jan 2006 22:44:15 +0200 (EET)
Date: Fri, 13 Jan 2006 22:44:14 +0200
From: Giorgos Keramidas <keramida@ceid.upatras.gr>
To: Kris Kennaway <kris@obsecurity.org>
Message-ID: <20060113204414.GA18348@flame.pc>
References: <1A89617A-5F0E-492E-8C21-10A4F679BCD2@freebsd.org>
	<14547.1137178334@critter.freebsd.dk>
	<20060113195319.GA17963@flame.pc>
	<20060113201829.GA24887@xor.obsecurity.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20060113201829.GA24887@xor.obsecurity.org>
Cc: Poul-Henning Kamp <phk@phk.freebsd.dk>, freebsd-current@freebsd.org,
	Jason Evans <jasone@freebsd.org>
Subject: Re: HEADSUP: malloc changeover
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 13 Jan 2006 20:45:57 -0000

On 2006-01-13 15:18, Kris Kennaway <kris@obsecurity.org> wrote:
>> I have built & run at least four versions since January 11, two with
>> DEBUG_FLAGS='-g' for both userland and kernel and two without.  As
>> Jason said, we should probably keep looking for potential problems
>> both in the new malloc() and the programs that use it[...]
>
> There are several ports that have build failures due to application
> bugs.  I think I emailed some of the maintainers already, but there
> are more that are going to be (re-)exposed by some more recent changes
> than that patchset I was testing.

I know :/

I've spent the relatively limited spare time I had the past 2 days
trying to track down a segfault & core dump in the build of a CVS
snapshot of Emacs.  Strangely enough, building with an older version of
malloc and then running the same binary with the new version works fine,
so this looks like a bug in the multi-stage build of Emacs instead of a
really serious malloc bug.  I've posted a request for help on
emacs-devel and continue trying to nail this down to something more
specific than "it crashes when s->data[nbytes]" is accessed.