[Bug 1974109] Re: [UBUNTU 22.04] zipl segfaults when "parameters=" is missing

[Frank Heimes]

Is it correct that the following commit fixes this?
"zipl: Add missing check for a nullpointer."
https://github.com/ibm-s390-linux/s390-tools/commit/6ff8202fa9e172199e995298d336d9dd87ca8180

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Title:
  [UBUNTU 22.04] zipl segfaults when "parameters=" is missing

Status in Ubuntu on IBM z Systems:
  Incomplete
Status in s390-tools package in Ubuntu:
  New
Status in s390-tools-signed package in Ubuntu:
  New

Bug description:
  ZIPL segfaults if a section doesn't contain a "parameter=" line.
  Adding that line makes the problem go away.
   
  This is especially a problem when secure execution is set up since the parameter is provided in the secure image and hence a zipl parameter is not needed.

  ---uname output---
  Linux linux6 5.15.0-27-generic #28-Ubuntu SMP Thu Apr 14 04:55:23 UTC 2022 s390x s390x s390x GNU/Linux
   
  Machine Type = z16 
   
  ---Steps to Reproduce---
  Add a section to /etc/zipl.conf that doesn't have a parameter line.
   
  Userspace tool common name: zipl 
   
  The userspace tool has the following bit modes: 64-bit

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