[Bug 1845337] Re: Disco autopkgtest @ armhf fails root-unittests -> test-execute -> exec-dynamicuser-statedir.service

[Adam Conrad]

I bumped the systemd/ppc64el hint and retried the rest, and autopkgtests
look clear now.

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Title:
  Disco autopkgtest @ armhf fails root-unittests -> test-execute ->
  exec-dynamicuser-statedir.service

Status in qemu package in Ubuntu:
  Invalid
Status in systemd package in Ubuntu:
  Fix Released
Status in qemu source package in Disco:
  Invalid
Status in systemd source package in Disco:
  Fix Committed

Bug description:
  [impact]

  due to a recent change to allow armhf tests to run lxd containers,
  autopkgtest for systemd on disco fails consistently.

  [test case]

  see test results, linked in original description below.

  [regression potential]

  very low, autopkgtest fix only.

  [other info]

  original description:
  ---

  Since the recent few weeks systemd autopkgtest @ armhf @ disco fail
  [1].

  The log is very (very) long and partially interwoven due to concurrent execution.
  Somewhere in between we see this subcase is the one failing: root-unittests
  Of this test (which again has many subtests) it is: test-execute
  And of this again it is (always):

  I'll attach bad and good case full and stripped logs.

  The diff of those comes down to just:
  1. execute a find in a shell
  2. shell exits
  3. exec-dynamicuser-statedir.service: Main process exited, code=exited, status=0/SUCCESS
  vs
  3. exec-dynamicuser-statedir.service: Main process exited, code=exited, status=1/FAILURE
  4. in the bad case that triggers an assertion
  The find that fails is:

  find / -path /var/tmp -o -path /tmp -o -path /proc -o -path
  /dev/mqueue -o -path /dev/shm -o -path /sys/fs/bpf

  Good and bad case are the same most recent version
  systemd/240-6ubuntu5.7.

  Maybe something is bad in the containers we have for armhf in regard to these paths?
  Was there any change we'd know of?

  If there is nothing known, could we force-badtest it to get it out of
  the way of ongoing migrations?

  [1]: http://autopkgtest.ubuntu.com/packages/s/systemd/disco/armhf

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