From 6cd6722c084df68fa6457dc9242dc6f6d74b9776 Mon Sep 17 00:00:00 2001
From: UdjinM6 <UdjinM6@users.noreply.github.com>
Date: Wed, 30 Nov 2016 04:48:05 +0400
Subject: [PATCH] fix deadlocks for MNVERIFY processing (#1173)

---
 src/masternodeman.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/masternodeman.cpp b/src/masternodeman.cpp
index 90b0e4b79..b5721a970 100644
--- a/src/masternodeman.cpp
+++ b/src/masternodeman.cpp
@@ -813,7 +813,8 @@ void CMasternodeMan::ProcessMessage(CNode* pfrom, std::string& strCommand, CData
 
     } else if (strCommand == NetMsgType::MNVERIFY) { // Masternode Verify
 
-        LOCK(cs);
+        // Need LOCK2 here to ensure consistent locking order because the all functions below call GetBlockHash which locks cs_main
+        LOCK2(cs_main, cs);
 
         CMasternodeVerification mnv;
         vRecv >> mnv;