From 7a8910443cda4f1801d4a0e72665b6b5ab0772a7 Mon Sep 17 00:00:00 2001
From: Ilya Savinov <ilya@dash.org>
Date: Mon, 25 Sep 2017 17:16:56 +0300
Subject: [PATCH] Fix unlocked access to vNodes.size() (#1654)

---
 src/net.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/net.cpp b/src/net.cpp
index 6eb6c8b8c8e48..a9d02efd6b1e8 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1170,8 +1170,13 @@ void CConnman::ThreadSocketHandler()
                 }
             }
         }
-        if(vNodes.size() != nPrevNodeCount) {
-            nPrevNodeCount = vNodes.size();
+        size_t vNodesSize;
+        {
+            LOCK(cs_vNodes);
+            vNodesSize = vNodes.size();
+        }
+        if(vNodesSize != nPrevNodeCount) {
+            nPrevNodeCount = vNodesSize;
             if(clientInterface)
                 clientInterface->NotifyNumConnectionsChanged(nPrevNodeCount);
         }