Index: /trunk/src/VBox/HostDrivers/VBoxNetFlt/VBoxNetFltInternal.h
===================================================================
--- /trunk/src/VBox/HostDrivers/VBoxNetFlt/VBoxNetFltInternal.h	(revision 22790)
+++ /trunk/src/VBox/HostDrivers/VBoxNetFlt/VBoxNetFltInternal.h	(revision 22791)
@@ -183,4 +183,6 @@
             /** Pointer to the unbound promiscuous stream. */
             void volatile *pvPromiscStream;
+            /** Whether we are attaching to IPv6 stream dynamically now. */
+            bool volatile fAttaching;
             /** Layered device handle to the interface. */
             ldi_handle_t hIface;
@@ -189,4 +191,6 @@
             /** Mutex protection used for loopback. */
             RTSEMFASTMUTEX hFastMtx;
+            /** Mutex protection used for dynamic IPv6 attaches. */
+            RTSEMFASTMUTEX hPollMtx;
             /** @} */
 # elif defined(RT_OS_WINDOWS)
@@ -223,5 +227,5 @@
         uint8_t abPadding[320];
 #else
-        uint8_t abPadding[64];
+        uint8_t abPadding[128];
 #endif
     } u;