Chaskiel,

Your logs show the pings going through in every other run. That's to be
expected. My script has poor error handling, and relies on various sleep
statements to set things up in order - it's meant to reliably trigger
the bug, rather than reliably transmit data. Feel free to fix it up :-)

When you say "When I run the perl script on 2.6.38-12.51, the system
does not crash, but the script doesn't behave the same as with
2.6.38-11.51", I would expect you to get oops on 2.6.38-11.51, as that's
without my script. So I'm not sure what the word "but" means here, as
opposed to "and".

I think your last sentence starting "In addition" you are saying that
even with 2.6.8-12.51 you can still trigger a container related oops but
with a different non-conntrack related traceback (so probably a
different oops), and triggered by a different test case. That should
probably be handled separately.

However, when I was looking for this bug, I noticed there were other
places (including one in the same file) where nfnetlink_has_listeners()
was being called without checking net->nfnl for NULL; in many, net->nfnl
can't be NULL no doubt. If it's an oops at the same place (I don't think
you attached the oops) you might try fixing it py putting in the obvious
check.

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https://bugs.launchpad.net/bugs/843892

Title:
  Repeatable kernel oops on container delete

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