skey from ubuntu_kvm_unit_tests failed on s390x zVM (Unexpected program interrupt : 0x1 on cpu 0 at 0x4, ilen 2)

[Po-Hsu Lin]

Issue found after kvm-unit-test repo updated to d8a4f9e5 (ci: Update the list of tests that we run in the Fedora Cirrus-CI)

Test interrupted with:
  Unexpected program interrupt : 0x1 on cpu 0 at 0x4, ilen 2

Test log:
Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/skey'
 BUILD_HEAD=1712f2a7
 timeout -k 1s --foreground 90s /usr/bin/qemu-system-s390x -nodefaults -nographic -machine s390-ccw-virtio,accel=kvm -chardev stdio,id=con0 -device sclpconsole,chardev=con0 -kernel /tmp/tmp.nGrdOCLzXo -smp 1 -device virtio-net-ccw # -initrd /tmp/tmp.QSKzJ99Rvq
 qemu-system-s390x: warning: 'apqci' requires 'ap'.
 qemu-system-s390x: warning: 'apft' requires 'ap'.
 qemu-system-s390x: warning: nic virtio-net-ccw.0 has no peer
 PASS: skey: privileged: sske: Program interrupt: expected(2) == received(2)
 PASS: skey: privileged: skey did not change on exception

 Unexpected program interrupt : 0x1 on cpu 0 at 0x4, ilen 2

 GPRS:
 0000000000000002 0001200180000000 0000000000011a14 000000000004fea0
 0000000000000000 000000000004fdc8 0000000000000000 0000000000000000
 0000000000000000 0000000000000000 0000000000000030 000000000002ae90
 0000000000028000 0000000000000000 000000000001b0e2 000000000004feb0

        STACK: 158c2 1109a 1b0e2 1b0d6 10100

 SUMMARY: 2 tests

 EXIT: STATUS=127
 FAIL skey (2 tests)

[Luke Nowakowski-Krijger (lukenow)]

This fails on bionic/linux/4.15.0-194.205/kernel02 in cycle 2022.09.19

[Luke Nowakowski-Krijger (lukenow)]

This specific test case passes on s2lp3 and then it happens to fail elsewhere with failures from other new test cases.

[Po-Hsu Lin (cypressyew)]

This can be found on Focal 5.4 zVM kernel04 as well.