[Bug 31772] New: NtQuerySystemInformation doesn't fill ReturnLength properly with SystemProcessInformation

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=31772

             Bug #: 31772
           Summary: NtQuerySystemInformation doesn't fill ReturnLength
                    properly with SystemProcessInformation
           Product: Wine
           Version: 1.5.13
          Platform: x86
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ntdll
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: nospam.kotarou.dono at gmail.com
    Classification: Unclassified


Created attachment 41804
  --> http://bugs.winehq.org/attachment.cgi?id=41804
Test program for calling NtTerminateProcess with it's handle as 0

While I was writing a test program for calling NtTerminateProcess with 0 as
it's handle, I found out NtQuerySystemInformation doesn't correctly fill
ReturnLength when called with SystemProcessInformation.

Code
---
SIZE_T spiSize;
NtQuerySystemInformation(SystemProcessInformation, NULL, 0, (ULONG*)&spiSize);

Expected result
---
spiSize contains the size of the needed buffer to completely contain all the
SYSTEM_PROCESS_INFORMATION and SYSTEM_THREAD_INFORMATION structures of the
processes and threads of the system.

Actual result
---
spiSize contains 0

On a side note, after hacking my code by pre-setting spiSize to an amount and
commenting out the first NtQuerySystemInformation call, the behaviour of
NtTerminateProcess is not what I expected: It should return STATUS_SUCCESS and
kill all threads except for the calling one, but it returns
STATUS_INVALID_HANDLE instead.

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