[Bug 55273] New: ntdll:wow64 - The 64-bit test_cpu_area() gets bad offsets on Windows 10 1607 & 1709

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55273

Bug ID: 55273
           Summary: ntdll:wow64 - The 64-bit test_cpu_area() gets bad
                    offsets on Windows 10 1607 & 1709
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: [e-mail]
          Reporter: [e-mail]

ntdll:wow64 - The 64-bit test_cpu_area() gets bad offsets on Windows 10 1607 &
1709:

wow64.c:783: Test failed: 0:0: wrong offset 4
wow64.c:783: Test failed: 0:1: wrong offset 6
wow64.c:783: Test failed: 0:2: wrong offset 4
wow64.c:783: Test failed: 0:3: wrong offset 6
wow64.c:783: Test failed: 0:4: wrong offset 4
wow64.c:783: Test failed: 0:5: wrong offset 6
wow64.c:783: Test failed: 0:6: wrong offset 4
wow64.c:783: Test failed: 0:7: wrong offset 6
wow64.c:783: Test failed: 1:0: wrong offset 16
wow64.c:783: Test failed: 1:1: wrong offset 14
wow64.c:783: Test failed: 1:2: wrong offset 12
wow64.c:783: Test failed: 1:3: wrong offset 10
wow64.c:783: Test failed: 1:4: wrong offset 8
wow64.c:783: Test failed: 1:5: wrong offset 6
wow64.c:783: Test failed: 1:6: wrong offset 4
wow64.c:783: Test failed: 1:7: wrong offset 18
wow64.c:783: Test failed: 2:0: wrong offset 8
wow64.c:783: Test failed: 2:1: wrong offset 6
wow64.c:783: Test failed: 2:2: wrong offset 4
wow64.c:783: Test failed: 2:3: wrong offset 10
wow64.c:783: Test failed: 2:4: wrong offset 8
wow64.c:783: Test failed: 2:5: wrong offset 6
wow64.c:783: Test failed: 2:6: wrong offset 4
wow64.c:783: Test failed: 2:7: wrong offset 10
wow64.c:783: Test failed: 3:0: wrong offset 16
wow64.c:783: Test failed: 3:1: wrong offset 14
wow64.c:783: Test failed: 3:2: wrong offset 12
wow64.c:783: Test failed: 3:3: wrong offset 10
wow64.c:783: Test failed: 3:4: wrong offset 8
wow64.c:783: Test failed: 3:5: wrong offset 6
wow64.c:783: Test failed: 3:6: wrong offset 4
wow64.c:783: Test failed: 3:7: wrong offset 18

See https://test.winehq.org/data/patterns.html#ntdll:wow64

The failures started with GitLab CI's switch to Debian 12 for the WineTest
builds which are used in the WineTest nightlies. However they also happen with
binaries built on Debian 11 so in this case it is just a coincidence.

See also bug 55272 for ntdll:exception crashes that started at the same time on
the same set of machines.