From owner-freebsd-hackers@FreeBSD.ORG Fri Oct 10 09:20:27 2008 Return-Path: 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 12C061065693 for ; Fri, 10 Oct 2008 09:20:27 +0000 (UTC) (envelope-from delphij@delphij.net) Received: from tarsier.delphij.net (delphij-pt.tunnel.tserv2.fmt.ipv6.he.net [IPv6:2001:470:1f03:2c9::2]) by mx1.freebsd.org (Postfix) with ESMTP id AFFEA8FC1B for ; Fri, 10 Oct 2008 09:20:26 +0000 (UTC) (envelope-from delphij@delphij.net) Received: from tarsier.geekcn.org (tarsier.geekcn.org [211.166.10.233]) (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by tarsier.delphij.net (Postfix) with ESMTPS id B2A3728454 for ; Fri, 10 Oct 2008 17:20:25 +0800 (CST) Received: from localhost (tarsier.geekcn.org [211.166.10.233]) by tarsier.geekcn.org (Postfix) with ESMTP id 3F360101D13B; Fri, 10 Oct 2008 17:20:25 +0800 (CST) X-Virus-Scanned: amavisd-new at geekcn.org Received: from tarsier.geekcn.org ([211.166.10.233]) by localhost (mail.geekcn.org [211.166.10.233]) (amavisd-new, port 10024) with ESMTP id rcR9XPaJKikW; Fri, 10 Oct 2008 17:20:20 +0800 (CST) Received: from delta.delphij.net (c-76-103-40-85.hsd1.ca.comcast.net [76.103.40.85]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by tarsier.geekcn.org (Postfix) with ESMTPSA id 49634101D124; Fri, 10 Oct 2008 17:20:19 +0800 (CST) DomainKey-Signature: a=rsa-sha1; s=default; d=delphij.net; c=nofws; q=dns; h=message-id:date:from:reply-to:organization:user-agent: mime-version:to:subject:x-enigmail-version:openpgp:content-type:content-transfer-encoding; b=gkwbq6Fs5nKrKeAJ5QzSfVd+L5cD3no9yfS5O2hGoEl8+3bgItqtqTn7olIjy2oPu D4g2SvyPWsKSWzqk6RoGQ== Message-ID: <48EF1E51.4050205@delphij.net> Date: Fri, 10 Oct 2008 02:20:17 -0700 From: Xin LI Organization: The Geek China Organization User-Agent: Thunderbird 2.0.0.17 (X11/20080926) MIME-Version: 1.0 To: freebsd-hackers@FreeBSD.org X-Enigmail-Version: 0.95.7 OpenPGP: id=18EDEBA0; url=http://www.delphij.net/delphij.asc Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Subject: Debugging modify-after-free issue X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: d@delphij.net List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Oct 2008 09:20:27 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, Recently I had some crashes and other issues on my laptop and I found that, among some bugs I already caught and fixed on my local tree, there is still something like this: Oct 10 01:35:53 delta kernel: Memory modified after free 0xffffff00a2ef9600(256) val=6438300 @ 0xffffff00a2ef9608 Is there any way to track this down (looks like to be wpi(4) related but still keep trying)? I can not seem to reliably trigger it so it would be helpful if such thing would trigger a panic. Cheers, -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEARECAAYFAkjvHlAACgkQi+vbBBjt66B2YQCeMXQwUWJOOm9PdCiFnsQD7Qba exkAnAz/4VRm+ZrU83XudWeo6lLTlkHO =N2pO -----END PGP SIGNATURE-----