Bug 2169063

Description of problem:
Systemd fails to mount namespace when using RootDirectory=some_ath, DynamicUser=true and StateDirectory, LogsDirectory etc.
This issue was already reported to systemd upstream (https://github.com/systemd/systemd/issues/22264) and they made a patch to fix it (https://github.com/systemd/systemd/pull/22272), however it has not currently been backported to the systemd package used by RHEL 9.1.

Version-Release number of selected component (if applicable): 250-12.el9_1.1





Steps to Reproduce:
1. wget https://dl-cdn.alpinelinux.org/alpine/v3.17/releases/x86_64/alpine-minirootfs-3.17.2-x86_64.tar.gz -O /tmp/rootfs.tar.gz
2. mkdir /tmp/rootfs && tar xf /tmp/rootfs.tar.gz -C /tmp/rootfs
3. chcon -R -t bin_t /tmp/rootfs/bin
4. chcon -R -t lib_t /tmp/rootfs/lib
5. sudo systemctl daemon-reload
6. sudo systemctl start test
7. systemctl status test

Content of unit test.service:
[Service]
DynamicUser=true
StateDirectory=foo
RootDirectory=/tmp/rootfs
ExecStart=/bin/cat /etc/os-release





Actual results:
× test.service
     Loaded: loaded (/etc/systemd/system/test.service; static)
     Active: failed (Result: exit-code) since Sat 2023-02-11 15:10:41 CET; 2s ago
   Duration: 4ms
    Process: 3468 ExecStart=/bin/cat /etc/os-release (code=exited, status=226/NAMESPACE)
   Main PID: 3468 (code=exited, status=226/NAMESPACE)
        CPU: 3ms

feb 11 15:10:41 lpc-machine systemd[1]: Started test.service.
feb 11 15:10:41 lpc-machine systemd[3468]: test.service: Failed to set up mount namespacing: File exists
feb 11 15:10:41 lpc-machine systemd[3468]: test.service: Failed at step NAMESPACE spawning /bin/cat: File exists
feb 11 15:10:41 lpc-machine systemd[1]: test.service: Main process exited, code=exited, status=226/NAMESPACE
feb 11 15:10:41 lpc-machine systemd[1]: test.service: Failed with result 'exit-code'





Expected results:
○ test.service
     Loaded: loaded (/etc/systemd/system/test.service; static)
     Active: inactive (dead)

feb 11 15:05:19 lpc-machine cat[10778]: 
feb 11 15:06:38 lpc-machine systemd[1]: Started test.service.
feb 11 15:06:38 lpc-machine cat[10856]: NAME="Alpine Linux"
feb 11 15:06:38 lpc-machine cat[10856]: ID=alpine
feb 11 15:06:38 lpc-machine cat[10856]: VERSION_ID=3.17.2
feb 11 15:06:38 lpc-machine cat[10856]: PRETTY_NAME="Alpine Linux v3.17"
feb 11 15:06:38 lpc-machine cat[10856]: HOME_URL="https://alpinelinux.org/"
feb 11 15:06:38 lpc-machine cat[10856]: BUG_REPORT_URL="https://gitlab.alpinelinux.org/alpine/aports/-/issues"
feb 11 15:06:38 lpc-machine systemd[1]: test.service: Deactivated successfully.






Additional info:
I was able to patch the systemd RPM package source used by RHEL and compile the systemd RPM package solving the issue, it would be helpful to update the RHEL 9 systemd package with the addition of the patch (https://github.com/systemd/systemd/pull/22272)