Index: /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceControlSession.cpp
===================================================================
--- /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceControlSession.cpp	(revision 55578)
+++ /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceControlSession.cpp	(revision 55579)
@@ -2350,7 +2350,7 @@
         {
             case VBOXSERVICESESSIONOPT_LOG_FILE:
-                if (!RTStrPrintf(g_szLogFile, sizeof(g_szLogFile), "%s", ValueUnion.psz))
-                    return RTMsgErrorExit(RTEXITCODE_FAILURE, "Unable to set logfile name to '%s'",
-                                          ValueUnion.psz);
+                rc = RTStrCopy(g_szLogFile, sizeof(g_szLogFile), ValueUnion.psz);
+                if (RT_FAILURE(rc))
+                    return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error copying log file name: %Rrc", rc);
                 break;
 #ifdef DEBUG