[Bug 1907306] Autopkgtest regression report (systemd/237-3ubuntu10.44)

[Ubuntu SRU Bot]

All autopkgtests for the newly accepted systemd (237-3ubuntu10.44) for bionic have finished running.
The following regressions have been reported in tests triggered by the package:

linux-azure-4.15/4.15.0-1104.116 (amd64)
munin/2.0.37-1ubuntu0.1 (arm64)
gvfs/1.36.1-0ubuntu1.3.3 (amd64)
libvirt/4.0.0-1ubuntu8.17 (i386)
apt/1.6.12ubuntu0.2 (armhf)
netplan.io/0.99-0ubuntu3~18.04.3 (amd64)
linux-hwe-5.0/5.0.0-63.69 (armhf)
openssh/1:7.6p1-4ubuntu0.3 (armhf, s390x, ppc64el, arm64, i386, amd64)
corosync/2.4.3-0ubuntu1.1 (armhf)
nut/2.7.4-5.1ubuntu2 (i386)


Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-
migration/bionic/update_excuses.html#systemd

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

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https://bugs.launchpad.net/bugs/1907306

Title:
  networkd dhcpv4 client never attempts more than 2 renew and 2 rebind

Status in systemd:
  Fix Released
Status in systemd package in Ubuntu:
  In Progress
Status in systemd source package in Bionic:
  Fix Committed
Status in systemd source package in Focal:
  Fix Committed
Status in systemd source package in Groovy:
  Fix Committed
Status in systemd source package in Hirsute:
  In Progress

Bug description:
  [impact]

  networkd dhcpv4 client never attempts more than 2 renew and 2 rebind

  [test case]

  configure an interface to use dhcpv4; acquire a dhcpv4 address, then
  stop the dhcpv4 server, and wait for the networkd client to perform
  its renewals and rebinds before expiring the lease

  using a 20 minute lease time as an example (all times are approximate
  due to RFC-mandated random 'fuzz' time of -1 to +1 sec):

  the current behavior would be to sent renew requests at:

  10:00
  13:45

  and then rebind requests at:

  17:30
  18:45

  then the lease would expire at 20:00

  the correct/new behavior should be renew requests at:

  10:00
  13:45
  15:37
  16:37

  and then rebind requests at:

  17:30
  18:45
  19:45

  and then lease expiration at 20:00.

  longer lease times would increase the number of retransmissions.

  [regression potential]

  any regression would likely result in problems receiving and/or
  maintaining a dhcpv4 address

  [scope]

  this is needed in b/f/g/h.

  this was fixed upstream in:
  https://github.com/systemd/systemd/pull/17908

  that was just added, so this is not fixed in any ubuntu release yet.

  technically, this is needed in x as well, however I don't plan to
  backport to x since 1) it reaches ESM soon and 2) the default network
  management tool in x is ifupdown, not systemd-networkd.

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