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[Bug 1824687] Re: 4.4.0-145-generic Kernel Panic ip6_expire_frag_queue

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Stefan Bader <stefan.bader@xxxxxxxxxxxxx>
Date: Mon, 15 Apr 2019 11:02:41 -0000
Reply-to: Bug 1824687 <1824687@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Package changed: linux-signed (Ubuntu) => linux (Ubuntu)

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1824687

Title:
  4.4.0-145-generic Kernel Panic  ip6_expire_frag_queue

Status in linux package in Ubuntu:
  New
Status in linux source package in Xenial:
  New

Bug description:
  Description:	Ubuntu 16.04.6 LTS
  Release:	16.04

  
  After upgrading our server to this Kernel we experience frequent Kernel panics (Attachment).
  Every 3 hours. 
  Our machine has a throuput of about 600 Mbits/s 
  The Panics are around the area of ip6_expire_frag_queue.

    __pskb_pull_tail
    ip6_dst_lookup_tail
    _decode_session6
    __xfrm_decode_session
    icmpv6_route_lookup
    icmp6_send

  
  It seems similar to Bug Report in Debian.
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=922488

  According to the bug finder of above bug it also occurred after using a Kernel with the change of
  rewrite ip6_expire_frag_queue()

  Intermediate solution. We disabled IPv6 on this machine to avoid further Panics.
  Please let me know what information is missing. The ubuntu-bug linux was send. And I hope it is attached to this report.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-145-generic 4.4.0-145.171
  ProcVersionSignature: Ubuntu 4.4.0-145.171-generic 4.4.176
  Uname: Linux 4.4.0-145-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  Date: Sun Apr 14 11:40:11 2019
  InstallationDate: Installed on 2018-03-18 (391 days ago)
  InstallationMedia: Ubuntu-Server 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: linux-signed
  UpgradeStatus: Upgraded to xenial on 2018-10-21 (174 days ago)

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