From owner-freebsd-current@FreeBSD.ORG Thu Mar 12 03:46:43 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9AC73106566C for ; Thu, 12 Mar 2009 03:46:43 +0000 (UTC) (envelope-from bms@incunabulum.net) Received: from out1.smtp.messagingengine.com (out1.smtp.messagingengine.com [66.111.4.25]) by mx1.freebsd.org (Postfix) with ESMTP id 7213D8FC0C for ; Thu, 12 Mar 2009 03:46:43 +0000 (UTC) (envelope-from bms@incunabulum.net) Received: from compute2.internal (compute2.internal [10.202.2.42]) by out1.messagingengine.com (Postfix) with ESMTP id 0C6282ECA5C for ; Wed, 11 Mar 2009 23:46:43 -0400 (EDT) Received: from heartbeat2.messagingengine.com ([10.202.2.161]) by compute2.internal (MEProxy); Wed, 11 Mar 2009 23:46:43 -0400 X-Sasl-enc: 6NGE9Sp76mXVA0WGIM1aVm4317EWwloZTYrUJzkinZ+c 1236829602 Received: from anglepoise.lon.incunabulum.net (82-35-112-254.cable.ubr07.dals.blueyonder.co.uk [82.35.112.254]) by mail.messagingengine.com (Postfix) with ESMTPSA id 8CDB150CB2 for ; Wed, 11 Mar 2009 23:46:42 -0400 (EDT) Message-ID: <49B885A1.9000907@incunabulum.net> Date: Thu, 12 Mar 2009 03:46:41 +0000 From: Bruce Simpson User-Agent: Thunderbird 2.0.0.19 (X11/20090125) MIME-Version: 1.0 To: freebsd-current@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: IGMPv3 hot interface detach panics? 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: Thu, 12 Mar 2009 03:46:43 -0000 Can I have some volunteers please... Sam reports a panic when detaching a card on the fly with the IGMPv3 code. Whilst I've taken a few precautions in the netisr against this, most likely there is something getting used-after-free in the domifdetach ping-pong which I've missed in the rush. So to track this down, I really need a backtrace with full debugging symbols. I would encourage anyone who may face a similar issue to try to reproduce it with HEAD and send me a full backtrace. I may not get around to fixing this right away -- already on other stuff -- but will try to as time arises. Many thanks, BMS