1 files changed, 4 insertions, 1 deletions
diff --git a/src/validation.cpp b/src/validation.cpp
index 77b6e7c051..84b93180d6 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -81,12 +81,14 @@ ChainstateManager g_chainman;
 
 CChainState& ChainstateActive()
 {
+    LOCK(::cs_main);
     assert(g_chainman.m_active_chainstate);
     return *g_chainman.m_active_chainstate;
 }
 
 CChain& ChainActive()
 {
+    LOCK(::cs_main);
     return ::ChainstateActive().m_chain;
 }
 
@@ -1295,6 +1297,7 @@ static CBlockIndex *pindexBestForkTip = nullptr, *pindexBestForkBase = nullptr;
 
 BlockMap& BlockIndex()
 {
+    LOCK(::cs_main);
     return g_chainman.m_blockman.m_block_index;
 }
 
@@ -4704,7 +4707,7 @@ bool LoadExternalBlockFile(const CChainParams& chainparams, FILE* fileIn, FlatFi
                 // Activate the genesis block so normal node progress can continue
                 if (hash == chainparams.GetConsensus().hashGenesisBlock) {
                     BlockValidationState state;
-                    if (!ActivateBestChain(state, chainparams)) {
+                    if (!ActivateBestChain(state, chainparams, nullptr)) {
                         break;
                     }
                 }