svm from ubuntu_kvm_unit_tests fails on B/F (Unhandled exception 6) with node riccioli

[Kelsey Steele]

Failing with "Unhandled exception 6 #UD at ip 0000000000400fa3" on 5.4.0-79.88 host riccioli

Not a regression, also seen to fail on Focal/linux 5.4.0-75.84 host blanka. Appears to maybe be a flaky test case.

1. 07/05 07:14:07 DEBUG| utils:0116| Running 'kvm-ok'
2. 07/05 07:14:07 DEBUG| utils:0153| [stdout] INFO: /dev/kvm exists
3. 07/05 07:14:07 DEBUG| utils:0153| [stdout] KVM acceleration can be used
4. 07/05 07:14:07 DEBUG| utils:0116| Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/svm'
5. 07/05 07:14:07 DEBUG| utils:0153| [stdout] BUILD_HEAD=0fb180cf
6. 07/05 07:14:08 DEBUG| utils:0153| [stdout] 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=kvm -kernel /tmp/tmp.afu142LIi6 -smp 2 -cpu max,+svm -m 4g # -initrd /tmp/tmp.txbozA64Bf
7. 07/05 07:14:08 DEBUG| utils:0153| [stdout] enabling apic
8. 07/05 07:14:08 DEBUG| utils:0153| [stdout] enabling apic
9. 07/05 07:14:08 DEBUG| utils:0153| [stdout] paging enabled
10. 07/05 07:14:08 DEBUG| utils:0153| [stdout] cr0 = 80010011
11. 07/05 07:14:08 DEBUG| utils:0153| [stdout] cr3 = 10bf000
12. 07/05 07:14:08 DEBUG| utils:0153| [stdout] cr4 = 20
13. 07/05 07:14:08 DEBUG| utils:0153| [stdout] NPT detected - running all tests with NPT enabled
14. 07/05 07:14:08 DEBUG| utils:0153| [stdout] PASS: null
15. 07/05 07:14:08 DEBUG| utils:0153| [stdout] PASS: vmrun
16. 07/05 07:14:08 DEBUG| utils:0153| [stdout] PASS: ioio
17. 07/05 07:14:08 DEBUG| utils:0153| [stdout] PASS: vmrun intercept check
18. 07/05 07:14:08 DEBUG| utils:0153| [stdout] Unhandled exception 6 #UD at ip 0000000000400fa3
19. 07/05 07:14:08 DEBUG| utils:0153| [stdout] error_code=0000 rflags=00010002 cs=00000008
20. 07/05 07:14:08 DEBUG| utils:0153| [stdout] rax=0000000000000000 rcx=0000000000000000 rdx=00000000ffffffff rbx=0000000000000000
21. 07/05 07:14:08 DEBUG| utils:0153| [stdout] rbp=00000000004347f8 rsi=0000000000000000 rdi=000000000041a9a0
22. 07/05 07:14:08 DEBUG| utils:0153| [stdout] r8=0000000000000000 r9=0000000000000000 r10=0000000000000000 r11=0000000000000000
23. 07/05 07:14:08 DEBUG| utils:0153| [stdout] r12=0000000000000000 r13=0000000000000000 r14=0000000000000000 r15=0000000000000000
24. 07/05 07:14:08 DEBUG| utils:0153| [stdout] cr0=0000000080010011 cr2=0000000000000000 cr3=00000000010bf000 cr4=0000000000000020
25. 07/05 07:14:08 DEBUG| utils:0153| [stdout] cr8=0000000000000000
26. 07/05 07:14:08 DEBUG| utils:0153| [stdout] STACK: @400fa3
27. 07/05 07:14:08 DEBUG| utils:0153| [stdout] FAIL svm
28. 07/05 07:14:08 ERROR| test:0414| Exception escaping from test:
29. Traceback (most recent call last):
30. File "/home/ubuntu/autotest/client/shared/test.py", line 411, in _exec
31. _call_test_function(self.execute, *p_args, **p_dargs)
32. File "/home/ubuntu/autotest/client/shared/test.py", line 823, in _call_test_function
33. return func(*args, **dargs)
34. File "/home/ubuntu/autotest/client/shared/test.py", line 291, in execute
35. postprocess_profiled_run, args, dargs)
36. File "/home/ubuntu/autotest/client/shared/test.py", line 212, in _call_run_once
37. self.run_once(*args, **dargs)
38. File "/home/ubuntu/autotest/client/tests/ubuntu_kvm_unit_tests/ubuntu_kvm_unit_tests.py", line 88, in run_once
39. raise error.TestError("Test failed for {}".format(test_name))
40. TestError: Test failed for svm

[Francis Ginther (fginther)]

Also fails on bionic:linux 4.15.

[Luke Nowakowski-Krijger (lukenow)]

Fails on b/fips 4.15.0-1070.79

[Po-Hsu Lin (cypressyew)]

With kvm-unit-test repo updated to d8a4f9e5 (ci: Update the list of tests that we run in the Fedora Cirrus-CI), this test is still failing with the same issue on node gonzo with B-4.15

[Po-Hsu Lin (cypressyew)]

On Jammy, the error message is a bit different, test end up with:
 FAIL: MSR_IA32_LASTBRANCHFROMIP, expected=0x4021ca, actual=0x4021ca
 PASS: Test that without LBRV enabled, guest LBR state does 'leak' to the host(1)
 Unhandled exception 6 #UD at ip 000000000040174a
 error_code=0000 rflags=00010097 cs=00000008
 rax=0000000000000000 rcx=00000000000001d9 rdx=0000000000000000 rbx=0000000000414920
 rbp=000000000042fa38 rsi=0000000000000003 rdi=0000000000414d98
  r8=00000000004176f9 r9=00000000000003f8 r10=000000000000000d r11=0000000000000000
 r12=0000000000000000 r13=0000000000000000 r14=0000000000000000 r15=0000000000000000
 cr0=0000000080010011 cr2=0000000000000000 cr3=00000000010bf000 cr4=0000000000040020
 cr8=0000000000000000
  STACK: @40174a 414e48 414e48 414e48 414e48 414e48 414e48 414e48 414e48 414e48 414e48 414e48 414e48 414e48 414e48 414e48 414e48 414e48 414e48 414e48
 FAIL svm

Full test log:
Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/svm'
 BUILD_HEAD=5251136b
 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=kvm -kernel /tmp/tmp.hBww2w4E5j -smp 2 -cpu max,+svm -m 4g -append -pause_filter_test # -initrd /tmp/tmp.oDwPB4oeYV
 enabling apic
 smp: waiting for 1 APs
 enabling apic
 setup: CPU 1 online
 paging enabled
 cr0 = 80010011
 cr3 = 10bf000
 cr4 = 20
 NPT detected - running all tests with NPT enabled
 PASS: null
 PASS: vmrun
 PASS: ioio
 PASS: vmrun intercept check
 PASS: rsm
 PASS: cr3 read intercept
 PASS: cr3 read nointercept
 PASS: cr3 read intercept emulate
 PASS: dr intercept check
 PASS: next_rip
 PASS: msr intercept check
 PASS: mode_switch
 PASS: asid_zero
 PASS: sel_cr0_bug
 PASS: tsc_adjust
     Latency VMRUN : max: 3002660 min: 3340 avg: 5320
     Latency VMEXIT: max: 2998700 min: 2240 avg: 2368
 PASS: latency_run_exit
     Latency VMRUN : max: 2904480 min: 5040 avg: 5306
     Latency VMEXIT: max: 2900400 min: 2240 avg: 2373
 PASS: latency_run_exit_clean
     Latency VMLOAD: max: 1813380 min: 240 avg: 267
     Latency VMSAVE: max: 1773120 min: 240 avg: 253
     Latency STGI: max: 10700 min: 40 avg: 47
     Latency CLGI: max: 1700260 min: 40 avg: 48
 PASS: latency_svm_insn
 PASS: exception with vector 2 not injected
 PASS: divide overflow exception injected
 PASS: eventinj.VALID cleared
 PASS: exc_inject
 PASS: pending_event
 PASS: pending_event_cli
 PASS: direct interrupt while running guest
 PASS: intercepted interrupt while running guest
 PASS: direct interrupt + hlt
 PASS: intercepted interrupt + hlt
 PASS: interrupt
 PASS: direct NMI while running guest
 PASS: NMI intercept while running guest
 PASS: nmi
 PASS: direct NMI + hlt
 PASS: NMI intercept while running guest
 PASS: intercepted NMI + hlt
 PASS: nmi_hlt
 PASS: virq_inject
 PASS: No RIP corruption detected after 10000 timer interrupts
 PASS: reg_corruption
 enabling apic
 setup: CPU 1 online
 PASS: svm_init_startup_test
 PASS: host_rflags
 PASS: CPUID.01H:ECX.XSAVE set before VMRUN
 PASS: svm_cr4_osxsave_test_guest finished with VMMCALL
 PASS:...