[ros-diffs] [sginsberg] 35042: - ExpLookupHandleTableEntry: Apply same changes as was done for ExpFreeHandleTable and ExpAllocateHandleTableEntrySlow in 34467 - ExpAllocateHandleTableEntry: Fail if we don't find a handle table entry
sginsberg at svn.reactos.org
sginsberg at svn.reactos.org
Sat Aug 2 20:25:53 CEST 2008
Author: sginsberg
Date: Sat Aug 2 13:25:53 2008
New Revision: 35042
URL: http://svn.reactos.org/svn/reactos?rev=35042&view=rev
Log:
- ExpLookupHandleTableEntry: Apply same changes as was done for ExpFreeHandleTable and ExpAllocateHandleTableEntrySlow in 34467
- ExpAllocateHandleTableEntry: Fail if we don't find a handle table entry
Modified:
trunk/reactos/ntoskrnl/ex/handle.c
Modified: trunk/reactos/ntoskrnl/ex/handle.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ex/handle.c?rev=35042&r1=35041&r2=35042&view=diff
==============================================================================
--- trunk/reactos/ntoskrnl/ex/handle.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ex/handle.c [iso-8859-1] Sat Aug 2 13:25:53 2008
@@ -35,8 +35,10 @@
ExpLookupHandleTableEntry(IN PHANDLE_TABLE HandleTable,
IN EXHANDLE LookupHandle)
{
- ULONG i, j, k, TableLevel, NextHandle;
- ULONG_PTR TableBase;
+ ULONG i, j, k, NextHandle;
+ ULONG_PTR TableCode = HandleTable->TableCode;
+ ULONG_PTR TableBase = TableCode & ~3;
+ ULONG TableLevel = (ULONG)(TableCode & 3);
PHANDLE_TABLE_ENTRY Entry = NULL;
EXHANDLE Handle = LookupHandle;
PUCHAR Level1, Level2, Level3;
@@ -45,13 +47,6 @@
Handle.TagBits = 0;
NextHandle = *(volatile ULONG*)&HandleTable->NextHandleNeedingPool;
if (Handle.Value >= NextHandle) return NULL;
-
- /* Get the table code */
- TableBase = *(volatile ULONG_PTR*)&HandleTable->TableCode;
-
- /* Extract the table level and actual table base */
- TableLevel = (ULONG)(TableBase & 3);
- TableBase = TableBase - TableLevel;
/* Check what level we're running at */
switch (TableLevel)
@@ -210,8 +205,8 @@
PEPROCESS Process = HandleTable->QuotaProcess;
ULONG i, j;
ULONG_PTR TableCode = HandleTable->TableCode;
- ULONG TableLevel = TableCode & 3;
ULONG_PTR TableBase = TableCode & ~3;
+ ULONG TableLevel = (ULONG)(TableCode & 3);
PHANDLE_TABLE_ENTRY Level1, *Level2, **Level3;
PAGED_CODE();
@@ -733,6 +728,13 @@
/* Lookup the entry for this handle */
Entry = ExpLookupHandleTableEntry(HandleTable, Handle);
+
+ /* Make sure that we found an entry */
+ if (!Entry)
+ {
+ /* We didn't, fail */
+ return NULL;
+ }
/* Get an available lock and acquire it */
i = ((OldValue & FREE_HANDLE_MASK) >> 2) % 4;
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