/usr/sbin/smbd:6:__strnlen_avx2:volume_label:smbd_do_qfsinfo:smbd_smb2_request_process_getinfo:smbd_smb2_request_dispatch

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding samba. This problem was most recently seen with package version 2:4.11.6+dfsg-0ubuntu1.9, the problem page at https://errors.ubuntu.com/problem/c6fd8a4070d4deef9779b2e27843f329755a631a contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.

[Athos Ribeiro (athos-ribeiro)]

This bug does not seem to be new here.

https://errors.ubuntu.com/problem/c6fd8a4070d4deef9779b2e27843f329755a631a shows it was triggered several times in other package releases for focal

Moreover, this looks quite similar to https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1914420, whose error was triggered several times for different series.

Finally, a closer look into those bug reports reveal a samba apport hook issue:

```
HookError_source_samba

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/apport/report.py", line 228, in _run_hook
symb['add_info'](report, ui)
File "/usr/share/apport/package-hooks/source_samba.py", line 93, in add_info
ui.information("As a part of the bug reporting process, you'll be asked as series of questions to help provide a more descriptive bug report. Please answer the following questions to the best of your abilities. Afterwards, a browser will be opened to finish filing this as a bug in the Launchpad bug tracking system.")
AttributeError: 'NoneType' object has no attribute 'information'
```

The hook relies on the presence of the "ui" variable (apport.ui.HookUI instance), which is not set for the reported bugs I could manually check.

Although the hook could terminate gracefully when ui is not defined, we will still not get access to the files needed for a thorough analysis of the issue since it would require user's consent given those files may contain sensitive data.