How can I see the core dumps produced by the policy-kit service?

Zuabi

2/12/24, 6:26 PM

I seem to have an issue with policy-kit. The output of systemctl status --full --lines=100 polkit.service is

Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: Changed failed -> start
Feb 12 18:35:46 flu-T430 systemd[1]: Starting Authorization Manager...
Feb 12 18:35:46 flu-T430 systemd[9219]: polkit.service: Executing: /usr/libexec/polkitd --no-debug
Feb 12 18:35:46 flu-T430 polkitd[9219]: started daemon version 0.105 using authority implementation `local' version `0.105'
Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: D-Bus name org.freedesktop.PolicyKit1 now owned by :1.140
Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: Changed start -> running
Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: Job 3133 polkit.service/start finished, result=done
Feb 12 18:35:46 flu-T430 systemd[1]: Started Authorization Manager.
Feb 12 18:35:46 flu-T430 polkitd(authority=local)[9219]: Registered Authentication Agent for unix-session:2 (system bus name :1.83 [/usr/bin/gnome-shell], object path /o>
Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: Child 9219 belongs to polkit.service.
Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: Main process exited, code=dumped, status=11/SEGV**
Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: Failed with result 'core-dump'.
Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: Service will not restart (restart setting)
Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: Changed running -> failed
Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: Unit entered failed state.
Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: Consumed 119ms CPU time.
Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: Control group is empty.
Feb 12 18:35:46 flu-T430 systemd[1]: polkit.service: D-Bus name org.freedesktop.PolicyKit1 now not owned by anyone.

In particular, there is one line that says Failed with result 'core-dump'. How do I get this core-dump?

I am on Ubuntu 22.04.1 LTS and coredumpctl is currently not installed.

Note: I found a file /var/crash/_usr_libexec_polkitd.0.crash but it's content is not human readable.

Solution: Running sudo apt install systemd-coredump lets me see the coredump by running sudo coredumpctl dump --output=/path/to/file

0 + 3

policykit

systemd-coredump

steeldriver

2/12/24, 6:47 PM

Does `coredumpctl list` mention it?

Zuabi

2/12/24, 6:51 PM

Unfortunately, it doesn't. `coredumpctl` is not installed. This is something I might try.

Zuabi

2/16/24, 7:14 PM

I installed `coredumpctl` the meantime and was able to see the coredump! Thanks @steeldriver. In that sens, my question is answered. Yet, I don't understand why polkitd is producing a segfault. But that would be another question. :/

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: How can I see the core dumps produced by the policy-kit service?

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.