From owner-freebsd-current@FreeBSD.ORG Fri Jun 24 16:51:04 2005 Return-Path: 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 BFE3D16A41C for ; Fri, 24 Jun 2005 16:51:04 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from obsecurity.dyndns.org (CPE0050040655c8-CM00111ae02aac.cpe.net.cable.rogers.com [69.194.102.232]) by mx1.FreeBSD.org (Postfix) with ESMTP id 88DD043D1F for ; Fri, 24 Jun 2005 16:51:04 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 53397515CB; Fri, 24 Jun 2005 12:51:03 -0400 (EDT) Date: Fri, 24 Jun 2005 12:51:03 -0400 From: Kris Kennaway To: Thierry Herbelot Message-ID: <20050624165103.GA36147@xor.obsecurity.org> References: <200506241626.57469.thierry@herbelot.com> <20050624150350.GA3256@xor.obsecurity.org> <200506241737.56466.thierry@herbelot.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="h31gzZEtNLTqOjlF" Content-Disposition: inline In-Reply-To: <200506241737.56466.thierry@herbelot.com> User-Agent: Mutt/1.4.2.1i Cc: freebsd-current@freebsd.org Subject: Re: panic: Memory modified after free X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 24 Jun 2005 16:51:04 -0000 --h31gzZEtNLTqOjlF Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Jun 24, 2005 at 05:37:55PM +0200, Thierry Herbelot wrote: > Le Friday 24 June 2005 17:03, Kris Kennaway a ?crit : > > On Fri, Jun 24, 2005 at 04:26:55PM +0200, Thierry Herbelot wrote: > > > This is with an SMP machine (oldish BP6) > > > > Looks like you forgot to include the full panic...wasn't there a "last > > used by FOO" also displayed? If so, you should configure > > DEBUG_MEMGUARD to watch this malloc type (some assembly required, but > > it's pretty straightforward -- see Bosko Milekic's post to this > > mailing list when he committed support describing how to do it) and > > try to replicate the panic. >=20 > sorry if I forgot anything : > this is the only message I had on the serial console : >=20 > [traditional dmesg startup messages] >=20 > Local package initialization:. > Additional TCP options:. > Starting background file system checks in 60 seconds. >=20 > Fri Jun 24 09:10:10 CEST 2005 >=20 > FreeBSD/i386 (multi-cur.herbelot.nom) (ttyd0) >=20 > login: Jun 24 09:11:02 multi-cur su: thierry.herbelot to root on /dev/tty= p0 > panic: Memory modified after free 0xc15c1400(256) val=3D0 @ 0xc15c1400 Sorry, you're right..this is probably related to Mike's recent commit that adds debugging and catches a new class of error. Kris --h31gzZEtNLTqOjlF Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCvDn2Wry0BWjoQKURAgzTAKC0Ph8ZsBytGZ6jahKuaZQ10IsP6QCgnsTx kBl9iq1ifJeSZLpWd9ryHHg= =BkYQ -----END PGP SIGNATURE----- --h31gzZEtNLTqOjlF--