[WIN32K:ENG] In EngLockDriverObj, properly return NULL when locking failed

CORE-15958

diff --git a/win32ss/gdi/eng/driverobj.c b/win32ss/gdi/eng/driverobj.c
index f1987df..1a4d772 100644 (file)
--- a/win32ss/gdi/eng/driverobj.c
+++ b/win32ss/gdi/eng/driverobj.c
@@ -120,7 +120,7 @@ EngLockDriverObj(
     pedo = DRIVEROBJ_TryLockObject(hdo);
 
     /* Return pointer to the DRIVEROBJ structure */
-    return &pedo->drvobj;
+    return pedo ? &pedo->drvobj : NULL;
 }