[Bug 1699942] Missing required logs.

[Ubuntu Kernel Bot]

This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1699942

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1699942

Title:
  network-manager fails to deprecate addresses

Status in linux package in Ubuntu:
  Incomplete
Status in network-manager package in Ubuntu:
  Triaged
Status in systemd package in Ubuntu:
  New

Bug description:
  network manager does not properly deprecate autoconfigured temporary IP addresses when ValidLifetime for a prefix is 0 in router advertisements. This behaviour is non-compliant with RFC 4861 § 6.3.4, which reads:
          If the prefix is already present in the host's Prefix List as
          the result of a previously received advertisement, reset its
          invalidation timer to the Valid Lifetime value in the Prefix
          Information option.  If the new Lifetime value is zero, time-out
          the prefix immediately.

  The hosts instead continued to use temporary addresses configured
  until they reached their timeout, rather than immediately dropping the
  addresses. It further appears that it is generating new temporary
  addresses when the previous ones expire, but I have not been
  monitoring hosts closely enough to tell for sure---I will update on
  this when I have further information.

  This problem was discovered on Ubuntu Studio 16.04.2; it is not
  present on Ubuntu Server (which uses Debian networking scripts).

  Additional Info:

  $ lsb_release -rd
  Description:	Ubuntu 16.04.2 LTS
  Release:	16.04
  $ apt-cache policy network-manager
  network-manager:
    Installed: 1.2.6-0ubuntu0.16.04.1
    Candidate: 1.2.6-0ubuntu0.16.04.1
    Version table:
   *** 1.2.6-0ubuntu0.16.04.1 500
          500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1.2.2-0ubuntu0.16.04.4 500
          500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
       1.1.93-0ubuntu4 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages

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