kernel-packages team mailing list archive

[Andrew Ignatov <1579385@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

After upgrading from Wily to Xenial, my server started being frequently
rebooted by an HP iLO watchdog. I turned it off, and installed kdump
tools, and managed to capture a kernel crashdump. Turned out to be a
network-related OOPS, looks like a bug with xtables modules and kernel
4.4.0 (the issue doesn't seem to occur with 4.2.0).

crash tool outputs for two crashes (occured in series with 5-minute pause for server coldboot):
http://pastebin.com/BSyEmUyJ

corresponding kernel backtraces:
http://pastebin.com/BMmqzrVP
http://pastebin.com/xQRA2kGP

The offending iptables rule, now removed:

iptables -A INPUT -j CHAOS --tarpit

xtables-addons-dkms and xtables-addons-common version:

 Installed: 2.10-1build1
  Candidate: 2.10-1build1
  Version table:
 *** 2.10-1build1 500
        500 http://mirror.yandex.ru/ubuntu xenial/universe amd64 Packages
        100 /var/lib/dpkg/status

Kernel version 4.4.0-22-generic #39-Ubuntu SMP Thu May 5 16:53:32 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux

I still have the dumps and can provide any additional information
necessary. Also please  let me know if this is a wrong place to report
this problem.

** Affects: xtables-addons (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: iptables kernel-bug xenial xtables-addons

** Package changed: kexec-tools (Ubuntu) => xtables-addons (Ubuntu)

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https://bugs.launchpad.net/bugs/1579385

Title:
  Kernel 4.4.0-22 OOPSes when using  xt_CHAOS from xtables-addons

Status in xtables-addons package in Ubuntu:
  New

Bug description:
  After upgrading from Wily to Xenial, my server started being
  frequently rebooted by an HP iLO watchdog. I turned it off, and
  installed kdump tools, and managed to capture a kernel crashdump.
  Turned out to be a network-related OOPS, looks like a bug with xtables
  modules and kernel 4.4.0 (the issue doesn't seem to occur with 4.2.0).

  crash tool outputs for two crashes (occured in series with 5-minute pause for server coldboot):
  http://pastebin.com/BSyEmUyJ

  corresponding kernel backtraces:
  http://pastebin.com/BMmqzrVP
  http://pastebin.com/xQRA2kGP

  The offending iptables rule, now removed:

  iptables -A INPUT -j CHAOS --tarpit

  xtables-addons-dkms and xtables-addons-common version:

   Installed: 2.10-1build1
    Candidate: 2.10-1build1
    Version table:
   *** 2.10-1build1 500
          500 http://mirror.yandex.ru/ubuntu xenial/universe amd64 Packages
          100 /var/lib/dpkg/status

  Kernel version 4.4.0-22-generic #39-Ubuntu SMP Thu May 5 16:53:32 UTC
  2016 x86_64 x86_64 x86_64 GNU/Linux

  I still have the dumps and can provide any additional information
  necessary. Also please  let me know if this is a wrong place to report
  this problem.

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