[Bug 1858412] Autopkgtest regression report (systemd/237-3ubuntu10.40)

[Ubuntu SRU Bot]

All autopkgtests for the newly accepted systemd (237-3ubuntu10.40) for bionic have finished running.
The following regressions have been reported in tests triggered by the package:

gvfs/1.36.1-0ubuntu1.3.3 (amd64)
prometheus-postgres-exporter/unknown (armhf)
systemd/237-3ubuntu10.40 (i386, ppc64el)
umockdev/0.11.1-1 (armhf)
linux-hwe-5.0/5.0.0-47.51~18.04.1 (armhf)
kde4libs/4:4.14.38-0ubuntu3.1 (armhf)
util-linux/unknown (armhf)
nftables/unknown (armhf)
linux-raspi2-5.3/5.3.0-1023.25~18.04.1 (armhf)
netplan.io/0.98-0ubuntu1~18.04.1 (i386)
openssh/1:7.6p1-4ubuntu0.3 (arm64, i386, armhf, ppc64el, s390x, amd64)


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/1858412

Title:
  systemd vacuuming does not work for remote journals

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Xenial:
  In Progress
Status in systemd source package in Bionic:
  Fix Committed
Status in systemd source package in Disco:
  Won't Fix
Status in systemd source package in Eoan:
  Fix Committed

Bug description:
  [impact]

  attempting to vacuum journals using -D with the 'root' (in journald
  terms) journal directory fails to perform any vacuuming.  This can
  lead to journal files continually increasing in size and filling up
  the filesystem.

  [test case]

  see original description below.

  [regession potential]

  this removes a check in the code when iterating journal directories
  during vacuuming, so any regression would likely occur during
  vacuuming, possibly causing failure to vacuum.

  [scope]

  this is fixed upstream by commit
  c488660e6edb3c1375ab62514a8df035c3d712bf which is included starting in
  version 244, so this is already included in Focal.  This is needed for
  Eoan, Bionic, and Xenial.

  [original description]

  systemd has an issue in regard to vacuuming remote journals:
  https://github.com/systemd/systemd/issues/2376 - this affects 18.04 as
  this version still has this problem.

  Steps to reproduce on "Description:     Ubuntu 18.04.3 LTS":

  root at 1:~# du -hs /var/log/journal/remote/
  8.6G	/var/log/journal/remote/
  root at 1:~# journalctl -D /var/log/journal/remote --vacuum-size=100M
  root at 1:~# du -hs /var/log/journal/remote/
  8.6G	/var/log/journal/remote/

  Would it be possible to backport this trivial patch
  https://github.com/systemd/systemd/pull/13924 into 18.04?

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