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Merge pull request #360 from Gustav-Simonsson/add_stack_size_checks

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Correct stack size validation for MUL, CALLDATACOPY, EXTCODESIZE, BLOCKH...
This commit is contained in:
Jeffrey Wilcke 2015-02-22 13:28:50 +01:00
commit dd086791ac
1 changed files with 3 additions and 3 deletions
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6
vm/vm.go
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@ -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])