Comment 19 for bug 1592990

Just to keep the bug status up-to-date quoting associated IBM Developer Stefan Haberland from LINUX-390 Mailing list about this:

16th June:
"I do not know where the CCW 0x66 comes from. The bootloader only uses
0x06, 0x41, 0x42, 0x43 and 0x63 for FBA.
Also I was unable to reproduce this issue on my system but one of our
tester reported he was able to do so.
I will try to investigate what happens."

22nd June:
"after some debugging I found a bug in the FBA loader that seems to occur
randomly. But in fact it depends on the size of the the kernel image
and/or some offsets within it. So some kernel images might hit it, most
of them do not.
The image vmlinuz-4.4.0-24-generic I used for a reproduction has an
offset within the file that triggers the bug.
Unfortunately I am not able to recommend a workaround beside using a
different kernel image (vmlinuz-4.4.0-21-generic worked for me).

We already created a reverse mirror of launchpad 1592990. I will attach
a patch to it after I did some further testing."