msr from ubuntu_kvm_unit_tests failed with "FAIL: Expected #GP on WRMSR(MSR_FS_BASE, 0xaaaaaaaaaaaaaaaa), got vector 0 on J-realtime openstack"

[Po-Hsu Lin]

This issue was found exclusively on J-realtime openstack AMD64 after updating our kvm-unit-test fork to 02d8befe99 "pretty_print_stacks: modify relative path calculation"

Unlike
  * bug 2047344 "FAIL: Expected #GP on RDSMR(x2APIC MSR 0x82e)"
  * bug 2047357 "FAIL: Expected #GP on WRMSR(x2APIC MSR 0x837, 0xffffffffffffffff), got vector 0"

This msr test is failing with the following error and the test seems to be terminated early:
FAIL: Expected #GP on WRMSR(MSR_FS_BASE, 0xaaaaaaaaaaaaaaaa), got vector 0

Test log:
 Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/msr'
 BUILD_HEAD=e45fc56f
 timeout -k 1s --foreground 90s /usr/bin/qemu-system-x86_64 --no-reboot -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=tcg -kernel /tmp/tmp.SpuMmOsmJs -smp 1 -cpu max,vendor=GenuineIntel # -initrd /tmp/tmp.mv8F3MnjRr
 enabling apic
 smp: waiting for 0 APs
 PASS: MSR_IA32_SYSENTER_CS
 PASS: MSR_IA32_SYSENTER_ESP
 PASS: MSR_IA32_SYSENTER_EIP
 PASS: MSR_IA32_MISC_ENABLE
 PASS: MSR_IA32_CR_PAT
 PASS: MSR_FS_BASE
 FAIL: Expected #GP on WRMSR(MSR_FS_BASE, 0xaaaaaaaaaaaaaaaa), got vector 0
 PASS: MSR_GS_BASE
 FAIL msr

[Po-Hsu Lin (cypressyew)]

Update description based on test case change in https://gitlab.com/kvm-unit-tests/kvm-unit-tests/-/commit/784dd85d25d484e513a05a8142effc8f9ae8228e