[dgorbachev] 61148: [NTOSKRNL] Fix undefined behavior issue.

Author: dgorbachev
Date: Fri Nov 29 22:34:43 2013
New Revision: 61148

URL: http://svn.reactos.org/svn/reactos?rev=61148&view=rev
Log:
[NTOSKRNL]
Fix undefined behavior issue.

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] Fri Nov 29 22:34:43 2013
@@ -747,9 +747,11 @@
                     Status = STATUS_INSUFFICIENT_RESOURCES;
                     goto cleanup;
                 }
-                RtlCopyMemory(NewBuffer, ReturnBuffer.Buffer, ReturnBuffer.Length);
                 if (ReturnBuffer.Buffer)
+                {
+                    RtlCopyMemory(NewBuffer, ReturnBuffer.Buffer, ReturnBuffer.Length);
                     ExFreePool(ReturnBuffer.Buffer);
+                }
                 ReturnBuffer.Buffer = NewBuffer;
             }
             DPRINT("Adding symbolic link %wZ\n", &KeyName);