) [sssd] [talloc_log_fn] (0x0010): Bad talloc magic value - unknown value

[Luis Gomez]

Once a month the server OS crashes and when users are trying to log in it will deny access. After reboot the problem resolves itself.

Error
 [sssd] [talloc_log_fn] (0x0010): Bad talloc magic value - unknown value

Kernel
4.4.0-31-generic

Updates available
377 packages can be updated.
227 updates are security updates.
New release '18.04.4 LTS' available.

- Is there a way to know the risks to update to a newer version of sssd?
- Can you please advise us on how to tackle this usse?

Kr,
Luis Gomez

[Christian Ehrhardt  (paelzer)]

Hi Luis,
I can derive from your info in [2] that you are on Xenial, so I'll mark that for now.
Do you happen to know if it also occurs on other releases?

Two things will commonly be needed to get any further on this.
1. your setup details, how did you setup sssd and your authentication exactly. Are there particular actions to trigger this bug or is it just time/logins that have to pass? If possible the best usually is if you are able to outline the steps needed to set up a clean new VM with Ubuntu to reach the bad state
2. Since it reports a crash is there any crash that you could report [1] ?

[1]: https://help.ubuntu.com/community/ReportingBugs#Reporting_a_crash
[2]: https://answers.launchpad.net/ubuntu/+question/689804

The message somehow felt familiar, but I couldn't find a case I touched that seemed like a full match. Looking further I found the old case I had in mind ...
=> https://bugs.launchpad.net/ubuntu/+source/sssd/+bug/1883614

I think I can mark this a dup and if you want you can chime in on the other bug that is already a few steps further in the debug-process but fell dead back then.