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[Salvatore Orlando <1273386@xxxxxxxxxxxxxxxxxx>]

The bug is still hitting stable builds. Backport is possible, but we
should solve first the related guestfs issues (bug 1275267)

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https://bugs.launchpad.net/bugs/1273386

Title:
  Neutron namespace metadata proxy triggers kernel crash on Ubuntu
  12.04/3.2 kernel

Status in OpenStack Neutron (virtual network service):
  Triaged
Status in OpenStack Compute (Nova):
  New
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  In the past 9 days we have been seeing very frequent occurences of
  this kernel crash: http://paste.openstack.org/show/61869/

  Even if the particular crash pasted here is triggered by dnsmasq, in
  almost all cases the crash is actually triggered by the neutron metada
  proxy.

  This also affects nova badly since this issue, which appears namespace
  related, results in a hang while mounting the ndb device for key
  injection.

  logstash query:
  http://logstash.openstack.org/#eyJzZWFyY2giOiJcImtlcm5lbCBCVUcgYXQgL2J1aWxkL2J1aWxkZC9saW51eC0zLjIuMC9mcy9idWZmZXIuYzoyOTE3XCIgYW5kIGZpbGVuYW1lOnN5c2xvZy50eHQiLCJmaWVsZHMiOltdLCJvZmZzZXQiOjAsInRpbWVmcmFtZSI6ImN1c3RvbSIsImdyYXBobW9kZSI6ImNvdW50IiwidGltZSI6eyJmcm9tIjoiMjAxNC0wMS0xNlQxODo1MDo0OCswMDowMCIsInRvIjoiMjAxNC0wMS0yN1QxOToxNjoxMSswMDowMCIsInVzZXJfaW50ZXJ2YWwiOiIwIn0sInN0YW1wIjoxMzkwODUwMzI2ODY0fQ==

  We have seen about 398 hits since the bug started to manifest.
  Decreased hit rate in the past few days is due to less neutron patches being pushed.

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