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Description of problem:
Plesk recently started using systemd-run for a similar method or running plesk event schedulers and since then we have a lot of systemd (pid 1) crashes. As far as we can tell it is because of this bug https://github.com/systemd/systemd/issues/8056.
Running systemd-run /usr/bin/echo привет can reproduce the crash every time.
We have reported the same problem to cloudlinux and they applied this fix which seems to correct the problem:
https://github.com/Werkov/systemd/commit/c6e6d92525bdec1fff7ce08cdb5d1c41b1eefc27

Version-Release number of selected component (if applicable):
systemd-219-78.el7_9.3.x86_64

How reproducible:
Always

Steps to Reproduce:
1. run "systemd-run /usr/bin/echo привет"


Actual results:
pid 1 crashes with:
Message from syslogd@linuxxxxx at Jun 20 10:35:11 ...
systemd:Caught <ABRT>, dumped core as pid nnnn.

Message from syslogd@linuxxxxx at Jun 20 10:35:11 ...
systemd:Freezing execution.


Expected results:
print the string привет


Additional info:
Centos bug report https://bugs.centos.org/view.php?id=18247

fix merged to github master branch -> https://github.com/redhat-plumbers/systemd-rhel7/pull/134

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (systemd bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:0066