igt@gem_exec_schedule@preemptive-hang@vcs0 - fail - Test assertion failure function preemptive_hang, Failed assertion: gem_bo_busy(fd, spin[n]->handle)

http://gfx-ci.igk.intel.com/cibuglog-ng/testresult/1520185946?query_key=0247a31a9efd43752fa6cf3a6f3d1eedc75ab06f

Stdout	
Starting dynamic subtest: vcs0
Stack trace:
  #0 ../../../usr/src/igt-gpu-tools/lib/igt_core.c:1988 __igt_fail_assert()
  #1 ../../../usr/src/igt-gpu-tools/lib/intel_allocator.h:266 __igt_unique____real_main3482()
  #2 ../../../usr/src/igt-gpu-tools/tests/i915/gem_exec_schedule.c:3482 main()
  #3 [__libc_start_main+0xf3]
  #4 [_start+0x2e]
Dynamic subtest vcs0: FAIL (15.871s)

Stderr	
Starting dynamic subtest: vcs0
(gem_exec_schedule:1366) CRITICAL: Test assertion failure function preemptive_hang, file ../../../usr/src/igt-gpu-tools/tests/i915/gem_exec_schedule.c:2390:
(gem_exec_schedule:1366) CRITICAL: Failed assertion: gem_bo_busy(fd, spin[n]->handle)
Dynamic subtest vcs0 failed.
**** DEBUG ****
(gem_exec_schedule:1366) intel_allocator_reloc-DEBUG: Using reloc allocator
(gem_exec_schedule:1366) intel_allocator_reloc-DEBUG: Using reloc allocator
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) igt_gt-DEBUG: Test requirement passed: gem_context_has_engine(fd, ctx, ring)
(gem_exec_schedule:1366) i915/gem_context-DEBUG: Test requirement passed: has_ban_period || has_bannable
(gem_exec_schedule:1366) igt_gt-DEBUG: Test requirement passed: has_gpu_reset(fd)
(gem_exec_schedule:1366) igt_gt-DEBUG: Test requirement passed: ctx == 0 || has_ctx_exec(fd, ring, ctx)
(gem_exec_schedule:1366) igt_dummyload-DEBUG: Test requirement passed: nengine
(gem_exec_schedule:1366) CRITICAL: Test assertion failure function preemptive_hang, file ../../../usr/src/igt-gpu-tools/tests/i915/gem_exec_schedule.c:2390:
(gem_exec_schedule:1366) CRITICAL: Failed assertion: gem_bo_busy(fd, spin[n]->handle)
(gem_exec_schedule:1366) igt_core-INFO: Stack trace:
(gem_exec_schedule:1366) igt_core-INFO:   #0 ../../../usr/src/igt-gpu-tools/lib/igt_core.c:1988 __igt_fail_assert()
(gem_exec_schedule:1366) igt_core-INFO:   #1 ../../../usr/src/igt-gpu-tools/lib/intel_allocator.h:266 __igt_unique____real_main3482()
(gem_exec_schedule:1366) igt_core-INFO:   #2 ../../../usr/src/igt-gpu-tools/tests/i915/gem_exec_schedule.c:3482 main()
(gem_exec_schedule:1366) igt_core-INFO:   #3 [__libc_start_main+0xf3]
(gem_exec_schedule:1366) igt_core-INFO:   #4 [_start+0x2e]
****  END  ****
Dynamic subtest vcs0: FAIL (15.871s)

Dmesg	
<6> [496.435503] [IGT] gem_exec_schedule: starting dynamic subtest vcs0
<7> [496.437677] [drm:eb_lookup_vmas [i915]] EINVAL at eb_validate_vma:508
<7> [496.440097] [drm:eb_lookup_vmas [i915]] EINVAL at eb_validate_vma:508
<7> [496.449529] [drm:eb_lookup_vmas [i915]] EINVAL at eb_validate_vma:508
<7> [496.457232] [drm:eb_lookup_vmas [i915]] EINVAL at eb_validate_vma:508
<7> [496.464948] [drm:eb_lookup_vmas [i915]] EINVAL at eb_validate_vma:508
<7> [496.472208] [drm:eb_lookup_vmas [i915]] EINVAL at eb_validate_vma:508
<7> [496.480058] [drm:eb_lookup_vmas [i915]] EINVAL at eb_validate_vma:508