New subject: [Bug 54272] ntdll-NtDevicePath breaks Wow.exe

6 Jan 2023


      https://bugs.winehq.org/show_bug.cgi?id=54272
Bug ID: 54272
           Summary: ntdll-NtDevicePath breaks Wow.exe
           Product: Wine-staging
           Version: 8.0-rc2
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs@winehq.org
          Reporter: kdt3rd@gmail.com
                CC: leslie_alistair@hotmail.com, z.figura12@gmail.com
      Distribution: ---
In 8.0-rc2, the ntdll-NtDevicePath patch was updated and re-enabled. However,
this seems to cause some sort of stack corruption that causes World of Warcraft
to hard abort with a free() invalid pointer error after about 10-20 minutes.
https://bugs.winehq.org/show_bug.cgi?id=54267 has a bit more information
I added some trace calls, and 99.9% of the time it goes either into the path
where the attributes provides a root directory, or the path does not match
either \SystemRoot\ or ??\ so is processed by the original code path. However,
when it does crash, it is during processing of
\SystemRoot\system32\ntoskrnl.exe
the path is converted to
??\C:\windows\system32\ntoskrnl.exe
and the nt_to_unix_file_name_internal function processes that correctly,
translating it to
<configroot>/c:/windows/system32/ntoskrnl.exe
but then crashes during the free of the 'name' variable at the end of (the new)
nt_to_unix_file_name. This is not the first time it did this transformation, if
I scroll back in the log, I see a few others. So something seems to be
triggering some sort of slow corruption - or debugstr_us is lying and there are
hidden non-printable characters in the above and that explains the corruption.
But I am sort of mystified, the lengths of the strings seem plausible. But if I
just remove that one patch (ntdll-NtDevicePath), all works...
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[Bug 54272] New: ntdll-NtDevicePath breaks Wow.exe