01e5e9c2c3
The oss-fuzz engine crashes due to stack overflow decoding a large nested
structure into a interface{}. This PR limits the size of the input data, so
should avoid such crashes.
131 lines
2.5 KiB
Go
131 lines
2.5 KiB
Go
// Copyright 2019 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package rlp
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import (
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"bytes"
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"fmt"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/rlp"
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)
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func decodeEncode(input []byte, val interface{}, i int) {
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if err := rlp.DecodeBytes(input, val); err == nil {
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output, err := rlp.EncodeToBytes(val)
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if err != nil {
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panic(err)
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}
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if !bytes.Equal(input, output) {
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panic(fmt.Sprintf("case %d: encode-decode is not equal, \ninput : %x\noutput: %x", i, input, output))
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}
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}
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}
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func Fuzz(input []byte) int {
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if len(input) == 0 {
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return 0
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}
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if len(input) > 500*1024 {
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return 0
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}
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var i int
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{
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rlp.Split(input)
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}
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{
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if elems, _, err := rlp.SplitList(input); err == nil {
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rlp.CountValues(elems)
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}
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}
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{
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rlp.NewStream(bytes.NewReader(input), 0).Decode(new(interface{}))
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}
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{
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decodeEncode(input, new(interface{}), i)
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i++
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}
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{
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var v struct {
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Int uint
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String string
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Bytes []byte
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}
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decodeEncode(input, &v, i)
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i++
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}
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{
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type Types struct {
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Bool bool
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Raw rlp.RawValue
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Slice []*Types
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Iface []interface{}
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}
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var v Types
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decodeEncode(input, &v, i)
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i++
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}
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{
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type AllTypes struct {
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Int uint
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String string
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Bytes []byte
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Bool bool
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Raw rlp.RawValue
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Slice []*AllTypes
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Array [3]*AllTypes
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Iface []interface{}
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}
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var v AllTypes
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decodeEncode(input, &v, i)
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i++
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}
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{
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decodeEncode(input, [10]byte{}, i)
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i++
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}
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{
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var v struct {
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Byte [10]byte
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Rool [10]bool
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}
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decodeEncode(input, &v, i)
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i++
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}
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{
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var h types.Header
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decodeEncode(input, &h, i)
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i++
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var b types.Block
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decodeEncode(input, &b, i)
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i++
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var t types.Transaction
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decodeEncode(input, &t, i)
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i++
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var txs types.Transactions
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decodeEncode(input, &txs, i)
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i++
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var rs types.Receipts
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decodeEncode(input, &rs, i)
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}
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return 1
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}
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