[rharabien] 51139: [WIN32K] Make sure strings returned by internal function RegQueryValue are NULL terminated

Author: rharabien
Date: Fri Mar 25 22:34:53 2011
New Revision: 51139

URL: http://svn.reactos.org/svn/reactos?rev=51139&view=rev
Log:
[WIN32K]

Make sure strings returned by internal function RegQueryValue are NULL terminated

Modified:
    trunk/reactos/subsystems/win32/win32k/misc/registry.c

Modified: trunk/reactos/subsystems/win32/win32k/misc/registry.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/mi…
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/misc/registry.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/win32/win32k/misc/registry.c [iso-8859-1] Fri Mar 25 22:34:53
2011
@@ -58,7 +58,7 @@
     ULONG cbInfoSize, cbDataSize;
 
     /* Check if the local buffer is sufficient */
-    cbInfoSize = sizeof(KEY_VALUE_PARTIAL_INFORMATION) + *pcbValue;
+    cbInfoSize = FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data) + *pcbValue;
     if (cbInfoSize <= sizeof(ajBuffer))
     {
         pInfo = (PVOID)ajBuffer;
@@ -89,8 +89,11 @@
         /* Did we get the right type */
         if (pInfo->Type == ulType)
         {
-            /* Copy the contents to the caller */
-            RtlCopyMemory(pvData, pInfo->Data, min(*pcbValue, cbDataSize));
+            /* Copy the contents to the caller. Make sure strings are null terminated */
+            if (ulType == REG_SZ || ulType == REG_MULTI_SZ || ulType == REG_EXPAND_SZ)
+                RtlStringCbCopyNW((LPWSTR)pvData, *pcbValue, (LPWSTR)pInfo->Data,
cbDataSize);
+            else
+                RtlCopyMemory(pvData, pInfo->Data, cbDataSize);
         }
         else
             Status = STATUS_OBJECT_TYPE_MISMATCH;