From 5ca990184f50168722810fb4c7c7d16cd1e9eb81 Mon Sep 17 00:00:00 2001
From: Guillaume Ballet <3272758+gballet@users.noreply.github.com>
Date: Sat, 20 Nov 2021 09:12:57 +0100
Subject: [PATCH] fix boundary check in PUSH

---
 core/vm/instructions.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index 4eec1d3014..27542af176 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -971,7 +971,11 @@ func makePush(size uint64, pushByteSize int) executionFunc {
 			for ; count < 31 && !scope.Contract.IsCode(chunk*31+count); count++ {
 			}
 			value[0] = byte(count)
-			copy(value[1:], scope.Contract.Code[chunk*31:(chunk+1)*31])
+			end := (chunk + 1) * 31
+			if end > uint64(len(scope.Contract.Code)) {
+				end = uint64(len(scope.Contract.Code))
+			}
+			copy(value[1:], scope.Contract.Code[chunk*31:end])
 			index := trieUtils.GetTreeKeyCodeChunk(scope.Contract.Address().Bytes(), uint256.NewInt(chunk))
 			interpreter.evm.TxContext.Accesses.TouchAddressAndChargeGas(index, nil)