Merge pull request #2833 from jjhursey/topic/ibm/v2.0.x/usock-cleanup

oob/usock: Protect against possible NULL peer

Author: hppritcha

orte/mca/oob/usock/oob_usock_connection.c

@@ -16,6 +16,7 @@
  * Copyright (c) 2013-2015 Intel, Inc.  All rights reserved.
  * Copyright (c) 2014-2016 Research Organization for Information Science
  *                         and Technology (RIST). All rights reserved.
+ *  Copyright (c) 2016      IBM Corporation.  All rights reserved.
  * $COPYRIGHT$
  *
  * Additional copyrights may follow
@@ -759,6 +760,10 @@ void mca_oob_usock_peer_close(mca_oob_usock_peer_t *peer)
 {
     mca_oob_usock_send_t *snd;
 
+    if( NULL == peer ) {
+        return;
+    }
+
     opal_output_verbose(OOB_USOCK_DEBUG_CONNECT, orte_oob_base_framework.framework_output,
                         "%s usock_peer_close for %s sd %d state %s",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),