From f9fad186080547a19fb3cc0f663763769b0830e5 Mon Sep 17 00:00:00 2001
From: flozilla <flozilla@users.noreply.github.com>
Date: Wed, 15 Nov 2017 10:02:23 +0000
Subject: [PATCH] blockchain_db: sanity check on tx/hash vector sizes

It could trip on a corrupt/crafted file if the user has disabled
input verification.
---
 src/blockchain_db/blockchain_db.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/blockchain_db/blockchain_db.cpp b/src/blockchain_db/blockchain_db.cpp
index c3f6e3d87..2fb43a4ba 100644
--- a/src/blockchain_db/blockchain_db.cpp
+++ b/src/blockchain_db/blockchain_db.cpp
@@ -194,6 +194,10 @@ uint64_t BlockchainDB::add_block( const block& blk
                                 , const std::vector<transaction>& txs
                                 )
 {
+  // sanity
+  if (blk.tx_hashes.size() != txs.size())
+    throw new std::runtime_error("Inconsistent tx/hashes sizes");
+
   block_txn_start(false);
 
   TIME_MEASURE_START(time1);