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vm: restrict max size in NEWARRAY/NEWSTRUCT

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This commit is contained in:
Evgenii Stratonikov 2019-10-17 11:03:21 +03:00
parent 85f7732d44
commit 8abcaeee6f
2 changed files with 26 additions and 4 deletions
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14
pkg/vm/vm.go
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@ -753,8 +753,11 @@ func (v *VM) execute(ctx *Context, op Instruction, parameter []byte) {
case *ArrayItem:
v.estack.PushVal(t)
default:
n := item.BigInt()
items := makeArrayOfFalses(int(n.Int64()))
n := item.BigInt().Int64()
if n > MaxArraySize {
panic("too long array")
}
items := makeArrayOfFalses(int(n))
v.estack.PushVal(&ArrayItem{items})
}
@ -766,8 +769,11 @@ func (v *VM) execute(ctx *Context, op Instruction, parameter []byte) {
case *StructItem:
v.estack.PushVal(t)
default:
n := item.BigInt()
items := makeArrayOfFalses(int(n.Int64()))
n := item.BigInt().Int64()
if n > MaxArraySize {
panic("too long struct")
}
items := makeArrayOfFalses(int(n))
v.estack.PushVal(&StructItem{items})
}