[Bug 1981042] Re: /etc/localtime symlink not correctly handled when using /etc/writable

[Launchpad Bug Tracker]

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 at .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 systemd-repart package.
    (LP: #1897932)
    Add fdisk as test dependency, needed by test-repart which calls sfdisk.
    Add libfdisk-dev/libssl-dev as dependencies, needed for systemd-repart.
    Author: Luca Boccassi
    Files:
    - debian/control
    - debian/rules
    - debian/systemd-repart.install
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=debbc5e9362522210096ae5fa9da48378791e381

  [ Lukas Märdian ]
  * Add sd-repart as test depend, to avoid skipping TEST-58-REPART
    File: debian/tests/control
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=669190653f06a6554ddf9725cbeccac65149df23

 -- Nick Rosbrook <nick.rosbrook at canonical.com>  Fri, 09 Sep 2022
14:47:16 -0400

** Changed in: systemd (Ubuntu Jammy)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1981042

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

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Jammy:
  Fix Released
Status in systemd source package in Kinetic:
  Fix Released

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.

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