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[Ubuntu SRU Bot <1911187@xxxxxxxxxxxxxxxxxx>]

All autopkgtests for the newly accepted systemd (246.6-1ubuntu1.2) for groovy have finished running.
The following regressions have been reported in tests triggered by the package:

snapd/2.48.3+20.10 (amd64)
nut/2.7.4-12ubuntu1 (ppc64el)


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/groovy/update_excuses.html#systemd

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

Thank you!

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https://bugs.launchpad.net/bugs/1911187

Title:
  scheduled reboot reboots immediately if dbus or logind is not
  available

Status in systemd package in Ubuntu:
  Fix Released
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

Bug description:
  [IMPACT]

  When, for whatever reason, logind or dbus is not available scheduled reboot reboots the machine immediately.
  From the sources it seems that this is intended :
  https://github.com/systemd/systemd/blob/master/src/systemctl/systemctl-logind.c#L318
  However, I report this as a bug since this is against the logic of a scheduled reboot; if someone schedules a reboot they want the system to reboot at the specified time not immediately.

  There has been a discussion upstream ( https://github.com/systemd/systemd/issues/17575 ) and
  a PR ( https://github.com/systemd/systemd/pull/18010 ).

  Upstream community is not willing to accept the patch but debian is.
  I open this bug to to pull the patch into Ubuntu once it lands in debian.

  [TEST PLAN]

  The simpler reproducer is to disable dbus to imitate the real world
  case.

  # systemctl stop dbus.service
  # systemctl stop dbus.socket
  # shutdown +1140 -r "REBOOT!"
  Failed to set wall message, ignoring: Failed to activate service 'org.freedesktop.login1': timed out (service_start_timeout=25000ms)
  Failed to call ScheduleShutdown in logind, proceeding with immediate shutdown: Connection timed out
  Connection to groovy closed by remote host.
  Connection to groovy closed.

  [WHERE PROBLEM COULD OCCUR]

  This patch changes the behaviour of scheduled reboot in case logind or dbus has failed.
  Originally, if logind is not available (call to logind bus fails
  https://github.com/systemd/systemd/blob/master/src/systemctl/systemctl-logind.c#L319)
  it proceeds with immediate shutdown.
  This patch changes this behaviour and instead of shutting down it does nothing.
  The actual regression potential is a user asking for a reboot and not getting it, so the largest regression potential is any existing users (human or programmatic) that are requesting a scheduled shutdown but not checking the return value for error.
  Any other regression would likely result in the system incorrectly not rebooted, or incorrectly scheduled for reboot.

  [OTHER]

  This is now fixed in H, currently affects B,G,F.

  Debian bug reports :
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=931235
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=960042

  Upstream issue : https://github.com/systemd/systemd/issues/17575
  PR : https://github.com/systemd/systemd/pull/18010

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