/etc/localtime symlink not correctly handled when using /etc/writable

Bug #1981042 reported by Robert Ancell
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
systemd (Ubuntu)
Status tracked in Kinetic
Jammy
Fix Released
Undecided
Unassigned
Kinetic
Fix Released
Undecided
Unassigned

Bug Description

[Impact]
When using /etc/writable (e.g. Ubuntu Core) /etc/localtime is a symlink to /etc/writable/localtime (which in itself if a symlink). Systemd doesn't handle this correctly when doing firstboot or using inotify to watch for changes to localtime.

[Test Plan]
This is somewhat hard to test, the following situations need to be reproduced:
- On firstboot the timezone link will not be read correctly, it will with this change.
- Starting a timer unit and then changing timezone will cause it not to occur at the correct time.

[Where problems could occur]
This could potentially break other users of localtime, however the change is similar to existing changes which have been in Ubuntu's version of systemd for some time. The change detects the /etc/writable case and if not should have the same existing behaviour.

Related branches

Nick Rosbrook (enr0n)
tags: added: rls-jj-incoming rls-kk-incoming
Lukas Märdian (slyon)
tags: added: fr-2547
tags: removed: rls-jj-incoming rls-kk-incoming
Lukas Märdian (slyon)
Changed in systemd (Ubuntu Kinetic):
status: New → Fix Committed
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package systemd - 251.2-2ubuntu2

---------------
systemd (251.2-2ubuntu2) kinetic; urgency=medium

  [ Lukas Märdian ]
  * Remove restart limit on the modprobe@.service (LP: #1982462)
    File: debian/patches/units-remove-the-restart-limit-on-the-modprobe-.service.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=46c36d4c73df8980f6b6137142fb16ba90465a94

  [ Nick Rosbrook ]
  * core,firstboot: workaround timezone issues on Ubuntu Core (LP: #1981042)
    Thanks to Robert Ancell for preparing the patch.
    File: debian/patches/lp1981042-core-firstboot-workaround-timezone-issues-caused-by-Ubunt.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=9a435d43e753f39531c9a5517a85e8eb259e18f1
  * pstore: do not try to load mtdpstore (LP: #1981622)
    File: debian/patches/lp1978079-pstore-Run-after-modules-are-loaded.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=38d8d12be924477f0eecb64f3737e07b03d73a42

 -- Nick Rosbrook <email address hidden> Fri, 22 Jul 2022 15:23:45 -0400

Changed in systemd (Ubuntu Kinetic):
status: Fix Committed → Fix Released
description: updated
Revision history for this message
Łukasz Zemczak (sil2100) wrote : Please test proposed package

Hello Robert, or anyone else affected,

Accepted systemd into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/systemd/249.11-0ubuntu3.5 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Changed in systemd (Ubuntu Jammy):
status: New → Fix Committed
tags: added: verification-needed verification-needed-jammy
Revision history for this message
Łukasz Zemczak (sil2100) wrote :

This does introduce some code duplication, but I guess that's fine.

Revision history for this message
Ubuntu SRU Bot (ubuntu-sru-bot) wrote : Autopkgtest regression report (systemd/249.11-0ubuntu3.5)

All autopkgtests for the newly accepted systemd (249.11-0ubuntu3.5) for jammy have finished running.
The following regressions have been reported in tests triggered by the package:

gvfs/1.48.2-0ubuntu1 (ppc64el)
systemd/249.11-0ubuntu3.5 (ppc64el)
udisks2/2.9.4-1ubuntu2 (arm64)

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/jammy/update_excuses.html#systemd

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

Thank you!

tags: added: foundations-todo
Revision history for this message
Łukasz Zemczak (sil2100) wrote : Please test proposed package

Hello Robert, or anyone else affected,

Accepted systemd into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/systemd/249.11-0ubuntu3.6 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Revision history for this message
Ubuntu SRU Bot (ubuntu-sru-bot) wrote : Autopkgtest regression report (systemd/249.11-0ubuntu3.6)

All autopkgtests for the newly accepted systemd (249.11-0ubuntu3.6) for jammy have finished running.
The following regressions have been reported in tests triggered by the package:

stunnel4/3:5.63-1build1 (amd64)
munin/2.0.57-1ubuntu2 (amd64)
corosync/unknown (s390x)
conntrack-tools/unknown (s390x)
exim4/4.95-4ubuntu2.1 (ppc64el)
umockdev/0.17.7-1 (armhf)
netplan.io/0.104-0ubuntu2.1 (amd64)
initramfs-tools/0.140ubuntu13 (amd64)
dovecot/unknown (s390x)
network-manager/1.36.6-0ubuntu2 (amd64)
cups/unknown (s390x)

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/jammy/update_excuses.html#systemd

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

Thank you!

Revision history for this message
Robert Ancell (robert-ancell) wrote :

Installed systemd 249.11-0ubuntu3.6 on a jammy VM and confirmed everything working as expected, thanks!

tags: added: verification-done-jammy
removed: verification-needed-jammy
Revision history for this message
Nick Rosbrook (enr0n) wrote :

The autopkgtest regressions for systemd 249.11-0ubuntu3.6 in jammy-proposed were all resolved with retries.

Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (3.9 KiB)

This bug was fixed in the package systemd - 249.11-0ubuntu3.6

---------------
systemd (249.11-0ubuntu3.6) jammy; urgency=medium

  * Deny-list TEST-58-REPART on ppc64el (LP: #1988994)
    File: debian/patches/lp1988994-Deny-list-TEST-58-REPART-on-ppc64el.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=d2ed3cc1d223bf35015b15ff83b50156b58f0f38

systemd (249.11-0ubuntu3.5) jammy; urgency=medium

  [ Nick Rosbrook ]
  * Ensure dns_search_domain_unlink_marked removes all marked domains (LP: #1975667)
    File: debian/patches/lp1975667-Ensure-dns_search_domain_unlink_marked-removes-all-marked.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=919d5ddedd5bb8b45ab9437bf42d66c2821bb074
  * core,firstboot: workaround timezone issues on Ubuntu Core (LP: #1981042)
    Thanks to Robert Ancell for preparing the patch.
    File: debian/patches/lp1981042-core-firstboot-workaround-timezone-issues-caused-by-Ubunt.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=b15546361b549217908fb6ca5d473be23d7fa757
  * network: do not remove localhost address (LP: #1979951)
    File: debian/patches/lp1979951-network-do-not-remove-localhost-address.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=2cd88391cce9fe95a486ae6dd214c12f236f3881
  * units: remove the restart limit on the modprobe@.service (LP: #1982462)
    File: debian/patches/lp1982462-units-remove-the-restart-limit-on-the-modprobe-.service.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=8f0acd1b2fbb8eed1259c34963e5e9b201bef900
  * pstore: do not try to load mtdpstore (LP: #1981622)
    File: debian/patches/lp1978079-efi-pstore-not-cleared-on-boot.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=15225032c3657f5906ee49d48929f9295a8664a0
  * core/mount: downgrade log level about several mkdir failures (LP: #1979952)
    Files:
    - debian/patches/lp1979952-Revert-core-mount-fail-early-if-directory-cannot-be-creat.patch
    - debian/patches/lp1979952-core-mount-downgrade-log-level-about-several-mkdir-failur.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=ee8cfcf500698fab2e990de291ecf4c3ab87a4ae
  * debian/control: add Recommends: systemd-hwe-hwdb to udev.
    The systemd-hwe-hwdb brings in additional hwdb rules for HWE, so we want
    those installed with udev by default.
    File: debian/control
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=4a7a3258c33201cca305956820fcc6bcd6052d76
  * hwdb: implement --root option for systemd-hwdb query (LP: #1988078)
    Files:
    - debian/libsystemd0.symbols
    - debian/patches/lp1988078-hwdb-implement-root-option-for-systemd-hwdb-query.patch
    - debian/patches/lp1988078-sd-hwdb-add-sd_hwdb_new_from_path.patch
    - debian/patches/lp1988078-sd-hwdb-include-sys-stat.h-in-hwdb-internal.h.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=937fef96c858f2f2042bf71032f315647c14add0

  [ Luca Boccassi ]
  * Enable systemd-repart and ship it in a new s...

Read more...

Changed in systemd (Ubuntu Jammy):
status: Fix Committed → Fix Released
Revision history for this message
Łukasz Zemczak (sil2100) wrote : Update Released

The verification of the Stable Release Update for systemd has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

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