full-disclosure - Re: How to lock up a VirtualBox host machine with a guest using tracepath over virtio-net network interface

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Date: Fri, 21 Jun 2013 13:03:35 -0400
From: Valdis.Kletnieks@...edu
To: Thomas Dreibholz <dreibh@...ula.no>
Cc: Full-Disclosure@...ts.grok.org.uk
Subject: Re: How to lock up a VirtualBox host machine with
	a guest using tracepath over virtio-net network interface

On Fri, 21 Jun 2013 16:33:35 +0200, Thomas Dreibholz said:

> - The host system is a 64-bit Linux (tested with Ubuntu 12.04 LTS and Kubuntu

What does 'uname -r' on the host return?

This is almost certainly a bug in either the host network stack or the
VirtualBox modules (probably one of the vboxnet ones).

Also, if you can manage to capture the output of 'sysrq-T' or 'echo t > /proc/sysrq-trigger'
(unfortunately, netconsole will probably *not* be an option here),
so we can see where teh various kernel threads are locked up.

Do you have the stack traceback that should have come out with the BUG message?

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