** Changed in: linux (Ubuntu Bionic)
       Status: In Progress => Confirmed

** Changed in: linux (Ubuntu Bionic)
     Assignee: Joseph Salisbury (jsalisbury) => (unassigned)

** Changed in: linux (Ubuntu)
       Status: In Progress => Fix Released

You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.

  the kernel is blackholing IPv6 packets to linkdown nexthops

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Zesty:
  Won't Fix
Status in linux source package in Artful:
  Fix Released
Status in linux source package in Bionic:

Bug description:
  == SRU Justification ==
  When the 'ignore_routes_with_linkdown' sysctl is set, we should not
  consider linkdown nexthops during route lookup.

  While the code correctly verifies that the initially selected route
  ('match') has a carrier, it does not perform the same check in the
  subsequent multipath selection, resulting in a potential packet loss.

  In case the chosen route does not have a carrier and the sysctl is set,
  choose the initially selected route.

  This is a regression introduced by commit 35103d11173b in 4.3-rc1.  Commit
  bbfcd7763 resolves this regression and is mainline as of 4.15-rc1.

  == Fix ==
  commit bbfcd77631573ac4a9f57eb6169e04256a111bc1
  Author: Ido Schimmel <ido...@mellanox.com>
  Date:   Tue Nov 21 09:50:12 2017 +0200

      ipv6: Do not consider linkdown nexthops during multipath

  == Regression Potential ==
  This fix is specific to ipv6 and fixes a current regression.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug 
  The bug reporter states the test kernel resolved the bug.

To manage notifications about this bug go to:

Mailing list: https://launchpad.net/~kernel-packages
Post to     : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp

Reply via email to