Found on node riccioli with 4.15.0-153.160

** Tags added: sru-20210719

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https://bugs.launchpad.net/bugs/1932966

Title:
  kvm_unit_tests: emulator test fails on 4.15 kernel, timeout

Status in ubuntu-kernel-tests:
  Confirmed
Status in linux-kvm package in Ubuntu:
  Confirmed
Status in linux-kvm source package in Bionic:
  Confirmed

Bug description:
  Found this on B/KVM, current cycle (sru-20210531):

  18:27:11 DEBUG| [stdout] PASS: movapd (write)^M
  18:27:11 DEBUG| [stderr] KVM internal error. Suberror: 1
  18:27:11 DEBUG| [stderr] emulation failure
  18:27:11 DEBUG| [stderr] RAX=000000000000000a RBX=ffffffffffffe000 
RCX=00000000000003fd RDX=00000000000003f8
  18:27:11 DEBUG| [stderr] RSI=0000000000419991 RDI=0000000000419991 
RBP=000000000051b440 RSP=000000000051b420
  18:27:11 DEBUG| [stderr] R8 =000000000000000a R9 =00000000000003f8 
R10=000000000000000d R11=0000000000000000
  18:27:11 DEBUG| [stderr] R12=ffffffffffffe000 R13=1111111111111111 
R14=ffffffffffffd000 R15=3333333333333333
  18:27:11 DEBUG| [stderr] RIP=0000000000400a0c RFL=00010006 [-----P-] CPL=0 
II=0 A20=1 SMM=0 HLT=0
  18:27:11 DEBUG| [stderr] ES =0010 0000000000000000 ffffffff 00c09300 DPL=0 DS 
  [-WA]
  18:27:11 DEBUG| [stderr] CS =0008 0000000000000000 ffffffff 00a09b00 DPL=0 
CS64 [-RA]
  18:27:11 DEBUG| [stderr] SS =0010 0000000000000000 ffffffff 00c09300 DPL=0 DS 
  [-WA]
  18:27:11 DEBUG| [stderr] DS =0010 0000000000000000 ffffffff 00c09300 DPL=0 DS 
  [-WA]
  18:27:11 DEBUG| [stderr] FS =0010 0000000000000000 ffffffff 00c09300 DPL=0 DS 
  [-WA]
  18:27:11 DEBUG| [stderr] GS =0010 000000000051a4d0 ffffffff 00c09300 DPL=0 DS 
  [-WA]
  18:27:11 DEBUG| [stderr] LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT
  18:27:11 DEBUG| [stderr] TR =0080 000000000041207a 0000ffff 00008b00 DPL=0 
TSS64-busy
  18:27:11 DEBUG| [stderr] GDT=     000000000041100a 0000106f
  18:27:11 DEBUG| [stderr] IDT=     0000000000410000 00000fff
  18:27:11 DEBUG| [stderr] CR0=80010011 CR2=0000000000000000 
CR3=0000000001007000 CR4=00000220
  18:27:11 DEBUG| [stderr] DR0=0000000000000000 DR1=0000000000000000 
DR2=0000000000000000 DR3=0000000000000000 
  18:27:11 DEBUG| [stderr] DR6=00000000ffff0ff0 DR7=0000000000000400
  18:27:11 DEBUG| [stderr] EFER=0000000000000500
  18:27:11 DEBUG| [stderr] Code=00 c7 45 e8 03 00 00 00 c7 45 ec 04 00 00 00 66 
0f 6f 45 e0 <0f> 11 03 48 89 de 48 8d 7d e0 e8 f8 f9 ff ff 0f b6 f8 be a1 8f 41 
00 b8 00 00 00 00 e8 05
  18:28:40 DEBUG| [stderr] qemu-system-x86_64: terminating on signal 15 from 
pid 13634 (timeout)
  18:28:40 DEBUG| [stdout] FAIL emulator (timeout; duration=90s)
  [...]
  TestError: Test failed for emulator
  18:28:40 ERROR| child process failed
  18:28:40 DEBUG| Traceback (most recent call last):
  18:28:40 DEBUG|   File "/home/ubuntu/autotest/client/parallel.py", line 25, 
in fork_start
  18:28:40 DEBUG|     l()
  18:28:40 DEBUG|   File "/home/ubuntu/autotest/client/job.py", line 505, in 
<lambda>
  18:28:40 DEBUG|     l = lambda: test.runtest(self, url, tag, args, dargs)
  18:28:40 DEBUG|   File "/home/ubuntu/autotest/client/test.py", line 125, in 
runtest
  18:28:40 DEBUG|     job.sysinfo.log_after_each_iteration)
  18:28:40 DEBUG|   File "/home/ubuntu/autotest/client/shared/test.py", line 
913, in runtest
  18:28:40 DEBUG|     mytest._exec(args, dargs)
  18:28:40 DEBUG|   File "/home/ubuntu/autotest/client/shared/test.py", line 
411, in _exec
  18:28:40 DEBUG|     _call_test_function(self.execute, *p_args, **p_dargs)
  18:28:40 DEBUG|   File "/home/ubuntu/autotest/client/shared/test.py", line 
823, in _call_test_function
  18:28:40 DEBUG|     return func(*args, **dargs)
  18:28:40 DEBUG|   File "/home/ubuntu/autotest/client/shared/test.py", line 
291, in execute
  18:28:40 DEBUG|     postprocess_profiled_run, args, dargs)
  18:28:40 DEBUG|   File "/home/ubuntu/autotest/client/shared/test.py", line 
212, in _call_run_once
  18:28:40 DEBUG|     self.run_once(*args, **dargs)
  18:28:40 DEBUG|   File 
"/home/ubuntu/autotest/client/tests/ubuntu_kvm_unit_tests/ubuntu_kvm_unit_tests.py",
 line 82, in run_once
  18:28:40 DEBUG|     raise error.TestError("Test failed for 
{}".format(test_name))
  18:28:40 DEBUG| TestError: Test failed for emulator
  18:28:41 INFO |                 ERROR   ubuntu_kvm_unit_tests.emulator  
ubuntu_kvm_unit_tests.emulator  timestamp=1624040921    localtime=Jun 18 
18:28:41       Test failed for emulator
  18:28:41 INFO |         END ERROR       ubuntu_kvm_unit_tests.emulator  
ubuntu_kvm_unit_tests.emulator  timestamp=1624040921    localtime=Jun 18 
18:28:41

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