From a992fcf6079ce6f3391be2f1f0aab9dc389246e7 Mon Sep 17 00:00:00 2001
From: Ismael Gomez <ismagom@gmail.com>
Date: Fri, 10 Nov 2017 07:42:45 +0100
Subject: [PATCH] Fix concurrent access segfault in RLC AM

---
 lib/src/upper/rlc_am.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/src/upper/rlc_am.cc b/lib/src/upper/rlc_am.cc
index 05f35ad76..96405e22a 100644
--- a/lib/src/upper/rlc_am.cc
+++ b/lib/src/upper/rlc_am.cc
@@ -296,8 +296,9 @@ int rlc_am::read_pdu(uint8_t *payload, uint32_t nof_bytes)
   }
   // RETX if required
   if(retx_queue.size() > 0) {
+    int ret = build_retx_pdu(payload, nof_bytes);
     pthread_mutex_unlock(&mutex);
-    return build_retx_pdu(payload, nof_bytes);
+    return ret; 
   }
 
   // Build a PDU from SDUs