[mjmartin] 47049: [ntoskrnl/io] - Check for null pointers before attempting to copy or free memory.

Author: mjmartin
Date: Tue Apr 27 15:41:37 2010
New Revision: 47049

URL: http://svn.reactos.org/svn/reactos?rev=47049&view=rev
Log:
[ntoskrnl/io]
- Check for null pointers before attempting to copy or free memory.

Modified:
    trunk/reactos/ntoskrnl/io/iomgr/deviface.c

Modified: trunk/reactos/ntoskrnl/io/iomgr/deviface.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/io/iomgr/deviface....
==============================================================================
--- trunk/reactos/ntoskrnl/io/iomgr/deviface.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/io/iomgr/deviface.c [iso-8859-1] Tue Apr 27 15:41:37 2010
@@ -884,7 +884,8 @@
 NextReferenceString:
             ExFreePool(ReferenceBi);
             ReferenceBi = NULL;
-            ExFreePool(bip);
+            if (bip)
+                ExFreePool(bip);
             bip = NULL;
             if (ReferenceKey != INVALID_HANDLE_VALUE)
             {
@@ -921,8 +922,11 @@
             Status = STATUS_INSUFFICIENT_RESOURCES;
             goto cleanup;
         }
-        RtlCopyMemory(NewBuffer, ReturnBuffer.Buffer, ReturnBuffer.Length);
-        ExFreePool(ReturnBuffer.Buffer);
+        if (ReturnBuffer.Buffer)
+        {
+            RtlCopyMemory(NewBuffer, ReturnBuffer.Buffer, ReturnBuffer.Length);
+            ExFreePool(ReturnBuffer.Buffer);
+        }
         ReturnBuffer.Buffer = NewBuffer;
     }
     ReturnBuffer.Buffer[ReturnBuffer.Length / sizeof(WCHAR)] = UNICODE_NULL;