[ros-diffs] [sginsberg] 36494: - MiQueryVirtualMemory shouldn't be called for kernel memory, so remove the special case code for a kernel address space. Also fixes a case where we would dereference an uninitialized pointer. - Fix for Coverity Error CID: 773

Author: sginsberg
Date: Wed Sep 24 14:13:08 2008
New Revision: 36494

URL: http://svn.reactos.org/svn/reactos?rev=36494&view=rev
Log:
- MiQueryVirtualMemory shouldn't be called for kernel memory, so remove the special
case code for a kernel address space. Also fixes a case where we would dereference an
uninitialized pointer.
- Fix for Coverity Error CID: 773

Modified:
    trunk/reactos/ntoskrnl/mm/virtual.c

Modified: trunk/reactos/ntoskrnl/mm/virtual.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/virtual.c?rev=…
==============================================================================
--- trunk/reactos/ntoskrnl/mm/virtual.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/virtual.c [iso-8859-1] Wed Sep 24 14:13:08 2008
@@ -427,26 +427,21 @@
     MEMORY_AREA* MemoryArea;
     PMM_AVL_TABLE AddressSpace;
 
-    if (Address < MmSystemRangeStart)
-    {
-        Status = ObReferenceObjectByHandle(ProcessHandle,
-                                           PROCESS_QUERY_INFORMATION,
-                                           NULL,
-                                           UserMode,
-                                           (PVOID*)(&Process),
-                                           NULL);
-
-        if (!NT_SUCCESS(Status))
-        {
-            DPRINT("NtQueryVirtualMemory() = %x\n",Status);
-            return(Status);
-        }
-        AddressSpace = &Process->VadRoot;
-    }
-    else
-    {
-        AddressSpace = MmGetKernelAddressSpace();
-    }
+    Status = ObReferenceObjectByHandle(ProcessHandle,
+                                       PROCESS_QUERY_INFORMATION,
+                                       NULL,
+                                       UserMode,
+                                       (PVOID*)(&Process),
+                                       NULL);
+
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT("NtQueryVirtualMemory() = %x\n",Status);
+        return(Status);
+    }
+
+    AddressSpace = &Process->VadRoot;
+
     MmLockAddressSpace(AddressSpace);
     MemoryArea = MmLocateMemoryAreaByAddress(AddressSpace, Address);
     switch(VirtualMemoryInformationClass)
@@ -572,11 +567,7 @@
     }
 
     MmUnlockAddressSpace(AddressSpace);
-    if (Address < MmSystemRangeStart)
-    {
-        ASSERT(Process);
-        ObDereferenceObject(Process);
-    }
+    ObDereferenceObject(Process);
 
     return Status;
 }