fix the bug of CHECKMULTISIG

neo-project · Dec 18, 2017 · cb1c4c9 · cb1c4c9
1 parent 00412c9
commit cb1c4c9
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/neo-vm/ExecutionEngine.cs b/src/neo-vm/ExecutionEngine.cs
@@ -606,7 +606,7 @@ private void ExecuteOp(OpCode opcode, ExecutionContext context)
                             else
                             {
                                 n = (int)item.GetBigInteger();
-                                if (n < 1)
+                                if (n < 1 || n > EvaluationStack.Count)
                                 {
                                     State |= VMState.FAULT;
                                     return;
@@ -631,7 +631,7 @@ private void ExecuteOp(OpCode opcode, ExecutionContext context)
                             else
                             {
                                 m = (int)item.GetBigInteger();
-                                if (m < 1 || m > n)
+                                if (m < 1 || m > n || m > EvaluationStack.Count)
                                 {
                                     State |= VMState.FAULT;
                                     return;