Index: dialin/protocols/CAN.py
===================================================================
diff -u -r9bc00e997e91dab8b404aa877b02ae3d4100d417 -rdef9334c5ce103f50e6cfde8cd37fb22c64c47f7
--- dialin/protocols/CAN.py	(.../CAN.py)	(revision 9bc00e997e91dab8b404aa877b02ae3d4100d417)
+++ dialin/protocols/CAN.py	(.../CAN.py)	(revision def9334c5ce103f50e6cfde8cd37fb22c64c47f7)
@@ -575,6 +575,7 @@
                     if not DenaliMessage.PAYLOAD_LENGTH_INDEX < len(can_data):
                         self.logger.error("Invalid Denali message received: {0}".format(message))
                         self.messages = None  # Can't process this message, get the next one
+                        self.message_queue_mutex.release()
                         continue
                     else:
                         message_length = can_data[DenaliMessage.PAYLOAD_LENGTH_INDEX]