From owner-freebsd-current@FreeBSD.ORG Sun Jun 26 08:50:00 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 9CAE216A41C; Sun, 26 Jun 2005 08:50:00 +0000 (GMT) (envelope-from thierry@herbelot.com) Received: from postfix3-2.free.fr (postfix3-2.free.fr [213.228.0.169]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5B42D43D49; Sun, 26 Jun 2005 08:50:00 +0000 (GMT) (envelope-from thierry@herbelot.com) Received: from herbelot.dyndns.org (bne75-4-82-227-159-103.fbx.proxad.net [82.227.159.103]) by postfix3-2.free.fr (Postfix) with ESMTP id 28F30C0AF; Sun, 26 Jun 2005 10:49:58 +0200 (CEST) Received: from diversion.herbelot.nom (diversion.herbelot.nom [192.168.2.6]) by herbelot.dyndns.org (8.13.3/8.13.3) with ESMTP id j5Q8njbW026795; Sun, 26 Jun 2005 10:49:51 +0200 (CEST) From: Thierry Herbelot To: freebsd-current@freebsd.org Date: Sun, 26 Jun 2005 10:49:39 +0200 User-Agent: KMail/1.8 References: <20050624212729.C537@odysseus.silby.com> <20050626012002.H935@odysseus.silby.com> <20050626064309.GA4700@nagual.pp.ru> In-Reply-To: <20050626064309.GA4700@nagual.pp.ru> X-Warning: Windows can lose your files X-Op-Sys: Le FriBi de la mort qui tue X-Org: TfH&Co X-MailScanner: Found to be clean MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Content-Disposition: inline Message-Id: <200506261049.42303.thierry@herbelot.com> Cc: Mike Silbersack , current@freebsd.org Subject: Re: Mbuf double-free guilty party detection patch X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: thierry@herbelot.com List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Jun 2005 08:50:00 -0000 Le Sunday 26 June 2005 08:43, Andrey Chernov a écrit : > On Sun, Jun 26, 2005 at 01:20:47AM -0500, Mike Silbersack wrote: > > Yes and no. Your results tell me that it's probably not a simple use > > after free, but rather something smashing all over memory for some > > reason. > > It sounds nasty, but I observe no strange behaviour of TCP connections at > all for a long time. I have a lots of them actively running sshd, > sendmail, popper, ftpd, bind, httpd and cvsupd servers. still no good luck : after using the second patch, no panic, but the debug messages seem incomplete : (last freed by: /0/) This memory last freed by: 0 Memory modified after free 0xc15d5800(256) val=800 @ 0xc15d583c This memory last freed by: 0 Memory modified after free 0xc15d5800(256) val=0 @ 0xc15d5840 This memory last freed by: 0 Memory modified after free 0xc15d5800(256) val=3 @ 0xc15d5844 the test case is : building the kernel while tar-ing the src tree over two separate ssh session. TfH PS : what is puzzling is that I've got another machine running a more recent -current, with no ill effects (but it uses an ed(4) I/F)