[Bug 2017853] Re: LXML dependency needs to be updated to fix segmentation fault

[Dennis Plöger]

I'm sorry, I can't reproduce this for the time being. I don't want to
migrate our cluster again just to test this and I can't reproduce it in
a test VM, even when I load our own configuration.

So, honestly, I don't know what this is. Maybe it was already fixed
somewhere else or something.

Thanks für your support!

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https://bugs.launchpad.net/bugs/2017853

Title:
  LXML dependency needs to be updated to fix segmentation fault

Status in crmsh package in Ubuntu:
  Incomplete
Status in lxml package in Ubuntu:
  Incomplete

Bug description:
  After upgrading our pacemaker/corosync cluster to Ubuntu 22.04 we had
  segmentation faults when running "crm configure". Using faulthandler
  to generate a python stacktrace yielded:

  Fatal Python error: Segmentation fault

  Current thread 0x00007efe7677a1c0 (most recent call first):
    File "/usr/lib/python3/dist-packages/crmsh/cibconfig.py", line 58 in show_unrecognized_elems
    File "/usr/lib/python3/dist-packages/crmsh/cibconfig.py", line 2779 in initialize
    File "/usr/lib/python3/dist-packages/crmsh/ui_configure.py", line 492 in requires
    File "/usr/lib/python3/dist-packages/crmsh/ui_context.py", line 265 in enter_level
    File "/usr/lib/python3/dist-packages/crmsh/ui_context.py", line 84 in run
    File "/usr/lib/python3/dist-packages/crmsh/main.py", line 196 in handle_noninteractive_use
    File "/usr/lib/python3/dist-packages/crmsh/main.py", line 249 in main_input_loop
    File "/usr/lib/python3/dist-packages/crmsh/main.py", line 370 in run
    File "/usr/sbin/crm", line 46 in <module>

  Extension modules: lxml._elementpath, lxml.etree (total: 2)
  Segmentation fault

  At that point, the code was using the findall method of lxml._Element
  to search through our (valid) cib configuration.

  Using pip3 install --upgrade lxml to update lxml to version 4.9.2
  solved this problem.

  I'm not really sure what specific bug was fixed, but I assume that it
  was this one in 4.9.1: https://lxml.de/4.9/changes-4.9.1.html

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