From 61977f956c6bacd6e05e3211bf2a90e5b5672a94 Mon Sep 17 00:00:00 2001
From: Gavin Andresen <gavinandresen@gmail.com>
Date: Sun, 25 Dec 2011 10:32:05 -0500
Subject: [PATCH] Check all prevout.n if one transaction provides multiple
 inputs

---
 src/main.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index 0277f5fa7..15f047bf7 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -945,10 +945,18 @@ bool CTransaction::FetchInputs(CTxDB& txdb, const map<uint256, CTxIndex>& mapTes
             if (!txPrev.ReadFromDisk(txindex.pos))
                 return error("FetchInputs() : %s ReadFromDisk prev tx %s failed", GetHash().ToString().substr(0,10).c_str(),  prevout.hash.ToString().substr(0,10).c_str());
         }
+    }
+
+    // Make sure all prevout.n's are valid:
+    for (int i = 0; i < vin.size(); i++)
+    {
+        const COutPoint prevout = vin[i].prevout;
+        const CTxIndex& txindex = inputsRet[prevout.hash].first;
+        const CTransaction& txPrev = inputsRet[prevout.hash].second;
         if (prevout.n >= txPrev.vout.size() || prevout.n >= txindex.vSpent.size())
             return DoS(100, error("FetchInputs() : %s prevout.n out of range %d %d %d prev tx %s\n%s", GetHash().ToString().substr(0,10).c_str(), prevout.n, txPrev.vout.size(), txindex.vSpent.size(), prevout.hash.ToString().substr(0,10).c_str(), txPrev.ToString().c_str()));
-
     }
+
     return true;
 }