Date: Sun, 22 Apr 2012 13:25:58 GMT From: Andrew McConachie <smutt@depht.com> To: freebsd-gnats-submit@FreeBSD.org Subject: i386/167202: Sending multiple IGMP packets crashes kernel Message-ID: <201204221325.q3MDPw4I026201@red.freebsd.org> Resent-Message-ID: <201204221330.q3MDUDhc098963@freefall.freebsd.org>
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>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: >>>
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