From owner-freebsd-i386@FreeBSD.ORG Sun Apr 22 13:30:13 2012 Return-Path: Delivered-To: freebsd-i386@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id A9D7D1065670 for ; Sun, 22 Apr 2012 13:30:13 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 68F048FC15 for ; Sun, 22 Apr 2012 13:30:13 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.5/8.14.5) with ESMTP id q3MDUD39098966 for ; Sun, 22 Apr 2012 13:30:13 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.5/8.14.5/Submit) id q3MDUDhc098963; Sun, 22 Apr 2012 13:30:13 GMT (envelope-from gnats) Resent-Date: Sun, 22 Apr 2012 13:30:13 GMT Resent-Message-Id: <201204221330.q3MDUDhc098963@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-i386@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Andrew McConachie Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 91F24106566C for ; Sun, 22 Apr 2012 13:25:58 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from red.freebsd.org (red.freebsd.org [IPv6:2001:4f8:fff6::22]) by mx1.freebsd.org (Postfix) with ESMTP id 7CE528FC14 for ; Sun, 22 Apr 2012 13:25:58 +0000 (UTC) Received: from red.freebsd.org (localhost [127.0.0.1]) by red.freebsd.org (8.14.4/8.14.4) with ESMTP id q3MDPw09026202 for ; Sun, 22 Apr 2012 13:25:58 GMT (envelope-from nobody@red.freebsd.org) Received: (from nobody@localhost) by red.freebsd.org (8.14.4/8.14.4/Submit) id q3MDPw4I026201; Sun, 22 Apr 2012 13:25:58 GMT (envelope-from nobody) Message-Id: <201204221325.q3MDPw4I026201@red.freebsd.org> Date: Sun, 22 Apr 2012 13:25:58 GMT From: Andrew McConachie To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: i386/167202: Sending multiple IGMP packets crashes kernel X-BeenThere: freebsd-i386@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: I386-specific issues for FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 Apr 2012 13:30:13 -0000 >Number: 167202 >Category: i386 >Synopsis: Sending multiple IGMP packets crashes kernel >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-i386 >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Apr 22 13:30:13 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Andrew McConachie >Release: 9.0-RELEASE >Organization: >Environment: FreeBSD crunch 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Tue Jan 3 07:15:25 UTC 2012 root@obrian.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386 >Description: I'm writing an IGMP test-tool in Scapy/Python and keep hitting this bug. Whenever I send too many IGMPv2 joins out an interface the kernel crashes. I can recreate this easily every time on FreeBSD. I'm running FreeBSD in VirtualBox 4.1.12 r77245. I am also running Debian in VirtualBox with essentially the same setup and it doesn't crash. Script to recreate as well as kernel dumps at http://www.depht.com/temp/igmpCrash.tgz >How-To-Repeat: Install Python/Scapy and run the script igmpCrash.py. You'll need igmp.py from the contrib section of Scapy. I installed both Python and Scapy from ports. smutt@crunch:/home/smutt$ python --version Python 2.7.2 smutt@crunch:/home/smutt$ scapy INFO: Can't import python gnuplot wrapper . Won't be able to plot. INFO: Can't import PyX. Won't be able to use psdump() or pdfdump(). INFO: Can't import python Crypto lib. Won't be able to decrypt WEP. INFO: Can't import python Crypto lib. Disabled certificate manipulation tools Welcome to Scapy (2.2.0) >Fix: >Release-Note: >Audit-Trail: >Unformatted: >>>