Re: [ros-dev] win2k poroblem

[Hartmut Birr]

Hi,

I get this again. I'm using cmd as login shell and starting the
explorer. I get hundreds of lines like this:

(ex/handle.c:721) Looking up invalid handle 0xffffffff
Frames: <ntoskrnl.exe:26efd (ex/handle.c:722 (ExpLookupHandleTableEntry))>
<ntoskrnl.exe:27576 (ex/handle.c:915 (ExMapHandleToPointer))>
<ntoskrnl.exe:748d8 (ps/cid.c:106 (PsLookupCidHandle))>
<ntoskrnl.exe:7c497 (ps/process.c:2709 (PsLookupProcessByProcessId))>
<win32k.sys:464d6 (objects/gdiobj.c:1219 (GDIOBJ_SetOwnership))>
<win32k.sys:6840 (eng/surface.c:466 (EngDeleteSurface))>
 <win32k.sys:52d16 (objects/text.c:1922 (NtGdiExtTextOut))>
<ntoskrnl.exe:3fb2 (D:\DOKUME~1\hb\LOKALE~1\Temp/ccUVaaaa.s:178
(KiSystemService))>
<gdi32.dll:9c22 (objects/text.c:272 (ExtTextOutW))>

The starting point does change but GDIOBJ_SetOwnership and later are
always the same. I attach my changes in ntoskrnl. I think that the
changes in ob/handle.c are not relevant. It is the smp build on my smp
machine.

- Hartmut

Filip Navara schrieb:
> Hartmut Birr wrote:
> > Hi,
> >
> > while looking for the console closing problem, I've seen that win2k
> > calls PsLookupProcessByProcessId very often with a id of 0xffffffff.
> > Hartmut
>
> I've put ASSERT(ProcessId != (HANDLE)-1) in PsLookupProcessByProcessId
> on my local copy and it was never triggered. My test was booting to
> Explorer and running OpenOffice.org 1.1.1 Word Processor...
> > (ex/handle.c:721) Looking up invalid handle 0xffffffff
> > Frames:
> > <ntoskrnl.exe:26f2d (ex/handle.c:722 (ExpLookupHandleTableEntry))>
> > <ntoskrnl.exe:275ce (ex/handle.c:919 (ExMapHandleToPointer))>
> > <ntoskrnl.exe:74af8 (ps/cid.c:106 (PsLookupCidHandle))>
> > <ntoskrnl.exe:7c6d5 (ps/process.c:2709 (PsLookupProcessByProcessId))>
> > <win32k.sys:45c16 (objects/gdiobj.c:1219 (GDIOBJ_SetOwnership))>
>
> ^ Honestly I can't see how can you ever get ProcessId == -1 from this
> line of code (assuming it's the correct line):
>    Status = PsLookupProcessByProcessId((HANDLE)((ULONG_PTR)PrevProcId
> & ~0x1), &OldProcess);
> Since a "binary and" with 0xfffffffe is performed, the result can
> never be 0xfffffffff.
> > <win32k.sys:6840 (eng/surface.c:466 (EngDeleteSurface))>
> > <win32k.sys:52456 (objects/text.c:1922 (NtGdiExtTextOut))>
> > <win32k.sys:539ef (objects/text.c:2770 (NtGdiTextOut))>
> > <ntoskrnl.exe:3fb2 (D:\DOKUME~1\hb\LOKALE~1\Temp/ccgPaaaa.s:178
> > (KiSystemService))>
> > <gdi32.dll:99bc (objects/text.c:45 (TextOutW))>
>
> Regards,
> Filip
> _______________________________________________
> Ros-dev mailing list
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M:\Sandbox\ros_work\reactos>set SVN_EDITOR=notepad

M:\Sandbox\ros_work\reactos>d:\programme\subversion\bin\svn.exe diff ntoskrnl\ob\handle.c ntoskrnl\ex\handle.c       
Index: ntoskrnl/ob/handle.c
===================================================================
--- ntoskrnl/ob/handle.c	(revision 14161)
+++ ntoskrnl/ob/handle.c	(working copy)
@@ -160,6 +160,7 @@
   POBJECT_HEADER ObjectHeader;
   LONG ExTargetHandle;
   LONG ExSourceHandle = HANDLE_TO_EX_HANDLE(SourceHandle);
+  ULONG NewHandleCount;

PAGED_CODE();

@@ -194,8 +195,8 @@
      1 here, we're in big trouble... it would've been safe to increment and
      check the handle count without using interlocked functions because the
      entry is locked, which means the handle count can't change. */
-  InterlockedIncrement(&ObjectHeader->HandleCount);
-  ASSERT(ObjectHeader->HandleCount >= 2);
+  NewHandleCount = InterlockedIncrement(&ObjectHeader->HandleCount);
+  ASSERT(NewHandleCount >= 2);

ExUnlockHandleTableEntry(SourceProcess->ObjectTable,
                            SourceHandleEntry);
@@ -323,7 +324,8 @@
      }

/* Check for magic handle first */
-   if (SourceHandle == NtCurrentThread())
+   if (SourceHandle == NtCurrentThread() ||
+       SourceHandle == NtCurrentProcess())
      {
        PVOID ObjectBody;

@@ -425,10 +427,7 @@
     ObjectHeader = EX_HTE_TO_HDR(HandleTableEntry);
     if(InterlockedIncrement(&ObjectHeader->HandleCount) == 1)
     {
-      ObReferenceObjectByPointer(HEADER_TO_BODY(ObjectHeader),
-			         0,
-			         NULL,
-			         UserMode);
+      ObReferenceObject(HEADER_TO_BODY(ObjectHeader));
     }
   }

@@ -555,10 +554,7 @@
    {
      if(InterlockedIncrement(&ObjectHeader->HandleCount) == 1)
      {
-      ObReferenceObjectByPointer(ObjectBody,
-			         0,
-			         NULL,
-			         UserMode);
+       ObReferenceObject(ObjectBody);
      }

*HandleReturn = EX_HANDLE_TO_HANDLE(ExHandle);
@@ -740,6 +736,7 @@
                                  HandleEntry);

KeLeaveCriticalRegion();
+        ObDereferenceObject(ObjectBody);

return(STATUS_OBJECT_TYPE_MISMATCH);
      }
@@ -756,6 +753,7 @@
    if (!(GrantedAccess & DesiredAccess) &&
        !((~GrantedAccess) & DesiredAccess))
      {
+             ObDereferenceObject(ObjectBody);
         CHECKPOINT;
         return(STATUS_ACCESS_DENIED);
      }
Index: ntoskrnl/ex/handle.c
===================================================================
--- ntoskrnl/ex/handle.c	(revision 14161)
+++ ntoskrnl/ex/handle.c	(working copy)
@@ -718,7 +718,9 @@
   }
   else
   {
-    DPRINT("Looking up invalid handle 0x%x\n", Handle);
+    DPRINT1("Looking up invalid handle 0x%x\n", Handle);
+    KeRosDumpStackFrames(NULL, 15);
+
   }

return Entry;