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Description of problem:

When reducing the stack limit for the user executing journalctl to 256KB, journalctl command dumps core:

$ ulimit -s 256
$ journalctl
Segmentation fault

This also affects RHEL8


Version-Release number of selected component (if applicable):

systemd-219, systemd-239 and upstream


How reproducible:

Always


Steps to Reproduce:
1. Create a user

# useradd user

2. Switch to user and set limit

# su - user
$ ulimit -s 256

3. Execute journalctl command

$ journalctl


Actual results:

Segmentation fault


Expected results:

"
Hint: You are currently not seeing messages from other users and the system.
      Users in the 'systemd-journal' group can see all messages. Pass -q to
      turn off this notice.
No journal files were opened due to insufficient permissions.
"

fix merged to github master branch -> https://github.com/systemd-rhel/rhel-7/pull/43 -> post

fix merged to github master branch -> https://github.com/systemd-rhel/rhel-8/pull/23 -> post

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, 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-2020:1117