Hi Faustin,

#12 This bug is a little bit about which image to use, because not every
image is triggering this bug. First, systemd must be present in the
image. Second, some images are known to not trigger it, e.g. Debian
older than 12, Fedora, Rocky, the whole RedHat world does not show the
behaviour.

#16 I used the --systemd always switch in #8 because it makes my life
easier not because it is strictly necessary. If I did not use it I had
to specify --tmpfs and volume for /sys/fs/cgroup manually (it does a
bunch foo magic in the background), see podman-run(1). But, of course,
the complexity grows with rootful vs. rootless or cgroups v1 vs. cgroups
v2 and stuff. It's easy to mix issues.

FWIW, here are my references for this bug.

https://noobient.com/2023/11/15/fixing-ubuntu-containers-failing-to-start-with-systemd/
https://github.com/containers/crun/issues/1308
https://github.com/containers/crun/pull/1309


** Bug watch added: github.com/containers/crun/issues #1308
   https://github.com/containers/crun/issues/1308

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https://bugs.launchpad.net/bugs/2056442

Title:
  Podman (crun) regression in Ubuntu 22.04: OCI runtime error: chmod
  `run/shm`: Operation not supported

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