From 5ad61d25f6b44feddb3557cdb984dcc0c6f521ca Mon Sep 17 00:00:00 2001
From: Xiaoqiang Wang <xiaoqiang.wang@psi.ch>
Date: Thu, 29 Sep 2016 11:23:14 -0500
Subject: [PATCH] Fix race condition in gdd

---
 src/gdd/gddAppTable.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/gdd/gddAppTable.cc b/src/gdd/gddAppTable.cc
index 92b0cacec..7a3890559 100644
--- a/src/gdd/gddAppTable.cc
+++ b/src/gdd/gddAppTable.cc
@@ -433,8 +433,10 @@ gddStatus gddApplicationTypeTable::freeDD(gdd* dd)
 		}
 
 		// fprintf(stderr,"Adding DD to free_list %d\n",app);
+		attr_table[group][app].sem.lock ();
 		dd->setNext(attr_table[group][app].free_list);
 		attr_table[group][app].free_list=dd;
+		attr_table[group][app].sem.unlock ();
 	}
 	else if (attr_table[group][app].type==gddApplicationTypeNormal)
 	{