Index: /trunk/src/VBox/Devices/Audio/DrvHostCoreAudio.cpp
===================================================================
--- /trunk/src/VBox/Devices/Audio/DrvHostCoreAudio.cpp	(revision 68237)
+++ /trunk/src/VBox/Devices/Audio/DrvHostCoreAudio.cpp	(revision 68238)
@@ -1635,4 +1635,10 @@
     }
 
+    if (pCAStream->pCfg)
+    {
+        DrvAudioHlpStreamCfgFree(pCAStream->pCfg);
+        pCAStream->pCfg = NULL;
+    }
+
     if (pCAStream->pCircBuf)
     {
@@ -1656,4 +1662,10 @@
 
     int rc = coreAudioStreamUninitQueue(pCAStream);
+    if (RT_SUCCESS(rc))
+    {
+        pCAStream->Unit.pDevice = NULL;
+        pCAStream->pDrv         = NULL;
+    }
+
     return rc;
 }