[Bug 216598] New: Assertion Failure in kvm selftest mmio_warning_test

[Bug 216598] New: Assertion Failure in kvm selftest mmio_warning_test

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216598

            Bug ID: 216598
           Summary: Assertion Failure in kvm selftest mmio_warning_test
           Product: Virtualization
           Version: unspecified
    Kernel Version: 6.0.0-rc7
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: kvm
          Assignee: virtualization_kvm@kernel-bugs.osdl.org
          Reporter: lixiao.yang@intel.com
        Regression: No

Created attachment 303018
  --> https://bugzilla.kernel.org/attachment.cgi?id=303018&action=edit
Host dmesg log

Environment:
CPU Architecture: x86_64
Host OS: Red Hat Enterprise Linux 8.4 (Ootpa)
Host kernel: 6.0.0-rc7
gcc: gcc (GCC) 8.4.1 
Host kernel source:  https://git.kernel.org/pub/scm/virt/kvm/kvm.git
Branch: next
Commit: e18d6152ff0f41b7f01f9817372022df04e0d354


Bug Detailed Description:
Assertion failure and host call trace happened after executing kvm selftest
mmio_warning_test.


Reproducing Steps:
git clone https://git.kernel.org/pub/scm/virt/kvm/kvm.git
cd kvm && make headers_install
cd kvm/tools/testing/selftests/kvm && make
cd x86_64 && ./mmio_warning_test

Actual Result:
[root@icx-2s2 ~]# kvm/tools/testing/selftests/kvm/x86_64/mmio_warning_test
ret1=0 exit_reason=17 suberror=1
ret1=0 exit_reason=8 suberror=65530
ret1=0 exit_reason=17 suberror=1
ret1=0 exit_reason=8 suberror=65530
ret1=0 exit_reason=17 suberror=1
ret1=0 exit_reason=8 suberror=65530
ret1=0 exit_reason=17 suberror=1
ret1=0 exit_reason=8 suberror=65530
ret1=0 exit_reason=17 suberror=1
ret1=0 exit_reason=8 suberror=65530
ret1=0 exit_reason=17 suberror=1
ret1=0 exit_reason=8 suberror=65530
ret1=0 exit_reason=17 suberror=1
ret1=0 exit_reason=8 suberror=65530
ret1=0 exit_reason=17 suberror=1
ret1=0 exit_reason=8 suberror=65530
ret1=0 exit_reason=17 suberror=1
ret1=0 exit_reason=8 suberror=65530
ret1=0 exit_reason=17 suberror=1
ret1=0 exit_reason=8 suberror=65530
==== Test Assertion Failure ====
  x86_64/mmio_warning_test.c:118: warnings_before == warnings_after
  pid=4383 tid=4383 errno=0 - Success
     1  0x0000000000402463: main at mmio_warning_test.c:117
     2  0x00007f5bc5c23492: ?? ??:0
     3  0x00000000004024dd: _start at ??:?
  Warnings found in kernel.  Run 'dmesg' to inspect them.

[root@icx-2s2 ~]#dmesg |grep -i "call trace"
[  208.938961] Call Trace:
[  209.289307] Call Trace:
[  209.683239] Call Trace:
[  210.016660] Call Trace:
[  210.389796] Call Trace:
[  210.727731] Call Trace:
[  211.090710] Call Trace:
[  211.422556] Call Trace:
[  211.785661] Call Trace:
[  212.117551] Call Trace:

Expected Result:
[root@icx-2s2 ~]#kvm/tools/testing/selftests/kvm/x86_64/mmio_warning_test
[root@icx-2s2 ~]
[root@icx-2s2 ~]#dmesg |grep -i "call trace"
[root@icx-2s2 ~]

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[Bug 216598] Assertion Failure in kvm selftest mmio_warning_test

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216598

Yang Lixiao (lixiao.yang@intel.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Regression|No                          |Yes

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Re: [Bug 216598] New: Assertion Failure in kvm selftest mmio_warning_test

[Sean Christopherson]

On Mon, Oct 17, 2022, bugzilla-daemon@kernel.org wrote:
> Created attachment 303018
>   --> https://bugzilla.kernel.org/attachment.cgi?id=303018&action=edit
> ==== Test Assertion Failure ====
>   x86_64/mmio_warning_test.c:118: warnings_before == warnings_after
>   pid=4383 tid=4383 errno=0 - Success
>      1  0x0000000000402463: main at mmio_warning_test.c:117
>      2  0x00007f5bc5c23492: ?? ??:0
>      3  0x00000000004024dd: _start at ??:?
>   Warnings found in kernel.  Run 'dmesg' to inspect them.

Known bug.  Fix is posted[*], will make sure it gets into 6.1 and I suppose
backported to stable.

[*] https://lore.kernel.org/all/20220930230008.1636044-1-seanjc@google.com

[Bug 216598] Assertion Failure in kvm selftest mmio_warning_test

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216598

--- Comment #1 from Sean Christopherson (seanjc@google.com) ---
On Mon, Oct 17, 2022, bugzilla-daemon@kernel.org wrote:
> Created attachment 303018
>   --> https://bugzilla.kernel.org/attachment.cgi?id=303018&action=edit
> ==== Test Assertion Failure ====
>   x86_64/mmio_warning_test.c:118: warnings_before == warnings_after
>   pid=4383 tid=4383 errno=0 - Success
>      1  0x0000000000402463: main at mmio_warning_test.c:117
>      2  0x00007f5bc5c23492: ?? ??:0
>      3  0x00000000004024dd: _start at ??:?
>   Warnings found in kernel.  Run 'dmesg' to inspect them.

Known bug.  Fix is posted[*], will make sure it gets into 6.1 and I suppose
backported to stable.

[*] https://lore.kernel.org/all/20220930230008.1636044-1-seanjc@google.com

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