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Added two missing dereferencing calls in ObReferenceObjectByHandle.

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Checked also for NtCurrentThread in NtDuplicateObject.  
Used the return value from InterlockedIncrement to check for a correct handle count.

svn path=/trunk/; revision=14188
This commit is contained in:
Hartmut Birr 2005-03-19 09:18:58 +00:00
parent c2a04f5107
commit 0692378689
1 changed files with 7 additions and 3 deletions
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10
reactos/ntoskrnl/ob/handle.c
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@ -166,6 +166,7 @@ ObDuplicateObject(PEPROCESS SourceProcess,
POBJECT_HEADER ObjectHeader;
LONG ExTargetHandle;
LONG ExSourceHandle = HANDLE_TO_EX_HANDLE(SourceHandle);
ULONG NewHandleCount;
PAGED_CODE();
@ -200,8 +201,8 @@ ObDuplicateObject(PEPROCESS SourceProcess,
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);
@ -329,7 +330,8 @@ NtDuplicateObject (IN HANDLE SourceProcessHandle,
}
/* Check for magic handle first */
if (SourceHandle == NtCurrentThread())
if (SourceHandle == NtCurrentThread() ||
SourceHandle == NtCurrentProcess())
{
PVOID ObjectBody;
@ -746,6 +748,7 @@ ObReferenceObjectByHandle(HANDLE Handle,
HandleEntry);
KeLeaveCriticalRegion();
ObDereferenceObject(ObjectBody);
return(STATUS_OBJECT_TYPE_MISMATCH);
}
@ -762,6 +765,7 @@ ObReferenceObjectByHandle(HANDLE Handle,
if (!(GrantedAccess & DesiredAccess) &&
!((~GrantedAccess) & DesiredAccess))
{
ObDereferenceObject(ObjectBody);
CHECKPOINT;
return(STATUS_ACCESS_DENIED);
}