[Bug 1990659] [NEW] Systemd component broken following update

[Michael R]

Public bug reported:

Following update to the latest package today (245.4-4ubuntu3.18) on
focal, systemd-resolved and systemd-timesyncd (at least) can't start

Ubuntu 20.04
x86_64
kernel 5.4.0-122-generic

logs:

Sep 23 10:48:53 systemd[1]: Starting Network Name Resolution...
Sep 23 10:48:53 systemd[1672342]: systemd-resolved.service: Failed to set up mount namespacing: /run/systemd/unit-root/dev: Invalid argument
Sep 23 10:48:53 systemd[1672342]: systemd-resolved.service: Failed at step NAMESPACE spawning /lib/systemd/systemd-resolved: Invalid argument
Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Main process exited, code=exited, status=226/NAMESPACE
Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Failed with result 'exit-code'.
Sep 23 10:48:53 systemd[1]: Failed to start Network Name Resolution.
Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Scheduled restart job, restart counter is at 5.
Sep 23 10:48:53 systemd[1]: Stopped Network Name Resolution.
Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Start request repeated too quickly.
Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Failed with result 'exit-code'.
Sep 23 10:48:53 systemd[1]: Failed to start Network Name Resolution.

** Affects: systemd (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  Following update to the latest package today (245.4-4ubuntu3.18) on
  focal, systemd-resolved and systemd-timesyncd can't start
  
  Ubuntu 20.04
  x86_64
  kernel 5.4.0-122-generic
  
  logs:
  
  Sep 23 10:48:53 systemd[1]: Starting Network Name Resolution...
  Sep 23 10:48:53 systemd[1672342]: systemd-resolved.service: Failed to set up mount namespacing: /run/systemd/unit-root/dev: Invalid argument
  Sep 23 10:48:53 systemd[1672342]: systemd-resolved.service: Failed at step NAMESPACE spawning /lib/systemd/systemd-resolved: Invalid argument
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Main process exited, code=exited, status=226/NAMESPACE
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Failed with result 'exit-code'.
  Sep 23 10:48:53 systemd[1]: Failed to start Network Name Resolution.
- Sep 23 10:48:53 curie systemd[1]: systemd-resolved.service: Scheduled restart job, restart counter is at 5.
+ Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Scheduled restart job, restart counter is at 5.
  Sep 23 10:48:53 systemd[1]: Stopped Network Name Resolution.
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Start request repeated too quickly.
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Failed with result 'exit-code'.
  Sep 23 10:48:53 systemd[1]: Failed to start Network Name Resolution.

** Description changed:

  Following update to the latest package today (245.4-4ubuntu3.18) on
- focal, systemd-resolved and systemd-timesyncd can't start
+ focal, systemd-resolved and systemd-timesyncd (at least) can't start
  
  Ubuntu 20.04
  x86_64
  kernel 5.4.0-122-generic
  
  logs:
  
  Sep 23 10:48:53 systemd[1]: Starting Network Name Resolution...
  Sep 23 10:48:53 systemd[1672342]: systemd-resolved.service: Failed to set up mount namespacing: /run/systemd/unit-root/dev: Invalid argument
  Sep 23 10:48:53 systemd[1672342]: systemd-resolved.service: Failed at step NAMESPACE spawning /lib/systemd/systemd-resolved: Invalid argument
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Main process exited, code=exited, status=226/NAMESPACE
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Failed with result 'exit-code'.
  Sep 23 10:48:53 systemd[1]: Failed to start Network Name Resolution.
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Scheduled restart job, restart counter is at 5.
  Sep 23 10:48:53 systemd[1]: Stopped Network Name Resolution.
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Start request repeated too quickly.
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Failed with result 'exit-code'.
  Sep 23 10:48:53 systemd[1]: Failed to start Network Name Resolution.

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https://bugs.launchpad.net/bugs/1990659

Title:
  Systemd component broken following update

Status in systemd package in Ubuntu:
  New

Bug description:
  Following update to the latest package today (245.4-4ubuntu3.18) on
  focal, systemd-resolved and systemd-timesyncd (at least) can't start

  Ubuntu 20.04
  x86_64
  kernel 5.4.0-122-generic

  logs:

  Sep 23 10:48:53 systemd[1]: Starting Network Name Resolution...
  Sep 23 10:48:53 systemd[1672342]: systemd-resolved.service: Failed to set up mount namespacing: /run/systemd/unit-root/dev: Invalid argument
  Sep 23 10:48:53 systemd[1672342]: systemd-resolved.service: Failed at step NAMESPACE spawning /lib/systemd/systemd-resolved: Invalid argument
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Main process exited, code=exited, status=226/NAMESPACE
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Failed with result 'exit-code'.
  Sep 23 10:48:53 systemd[1]: Failed to start Network Name Resolution.
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Scheduled restart job, restart counter is at 5.
  Sep 23 10:48:53 systemd[1]: Stopped Network Name Resolution.
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Start request repeated too quickly.
  Sep 23 10:48:53 systemd[1]: systemd-resolved.service: Failed with result 'exit-code'.
  Sep 23 10:48:53 systemd[1]: Failed to start Network Name Resolution.

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