From fd3793b8cf04e2ca78b9c0a01844a09aa25b91e9 Mon Sep 17 00:00:00 2001
From: Gustav Simonsson <gustav.simonsson@gmail.com>
Date: Sat, 21 Feb 2015 05:33:51 +0100
Subject: [PATCH] Correct stack size validation for MUL, CALLDATACOPY,
EXTCODESIZE, BLOCKHASH
---
vm/vm.go | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/vm/vm.go b/vm/vm.go
index 5ec507ddc..bb293eb9b 100644
--- a/vm/vm.go
+++ b/vm/vm.go
@@ -779,9 +779,9 @@ func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCo
// Stack Check, memory resize & gas phase
switch op {
// Stack checks only
- case ISZERO, CALLDATALOAD, POP, JUMP, NOT: // 1
+ case ISZERO, CALLDATALOAD, POP, JUMP, NOT, EXTCODESIZE, BLOCKHASH: // 1
stack.require(1)
- case JUMPI, ADD, SUB, DIV, SDIV, MOD, SMOD, LT, GT, SLT, SGT, EQ, AND, OR, XOR, BYTE, SIGNEXTEND: // 2
+ case JUMPI, ADD, SUB, DIV, MUL, SDIV, MOD, SMOD, LT, GT, SLT, SGT, EQ, AND, OR, XOR, BYTE, SIGNEXTEND: // 2
stack.require(2)
case ADDMOD, MULMOD: // 3
stack.require(3)
@@ -859,7 +859,7 @@ func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCo
newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-2])
additionalGas.Set(stack.data[stack.Len()-2])
case CALLDATACOPY:
- stack.require(2)
+ stack.require(3)
newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-3])
additionalGas.Set(stack.data[stack.Len()-3])
--
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