assumeutxo: Check deserialized coins for out of range values

Author: fjahr

src/validation.cpp

@@ -5399,6 +5399,11 @@ bool ChainstateManager::PopulateAndValidateSnapshot(
                       coins_count - coins_left);
             return false;
         }
+        if (!MoneyRange(coin.out.nValue)) {
+            LogPrintf("[snapshot] bad snapshot data after deserializing %d coins - bad tx out value\n",
+                      coins_count - coins_left);
+            return false;
+        }
 
         coins_cache.EmplaceCoinInternalDANGER(std::move(outpoint), std::move(coin));