1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stddef.h>
#include <stdint.h>
#include <fuzzer/FuzzedDataProvider.h>
#include <list>
#include <vector>
#include "net/third_party/quiche/src/quiche/http2/hpack/decoder/hpack_decoder.h"
// Entry point for LibFuzzer.
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
// At least 4 bytes of fuzz data are needed to generate a max string size.
if (size < 4)
return 0;
FuzzedDataProvider fuzzed_data_provider(data, size);
size_t max_string_size =
fuzzed_data_provider.ConsumeIntegralInRange<size_t>(1, 10 * size);
http2::HpackDecoder decoder(http2::HpackDecoderNoOpListener::NoOpListener(),
max_string_size);
decoder.StartDecodingBlock();
// Store all chunks in a function scope list, as the API requires the caller
// to make sure the fragment chunks data is accessible during the whole
// decoding process. |http2::DecodeBuffer| does not copy the data, it is just
// a wrapper for the chunk provided in its constructor.
std::list<std::vector<char>> all_chunks;
while (fuzzed_data_provider.remaining_bytes() > 0) {
size_t chunk_size = fuzzed_data_provider.ConsumeIntegralInRange(1, 32);
all_chunks.emplace_back(
fuzzed_data_provider.ConsumeBytes<char>(chunk_size));
const auto& chunk = all_chunks.back();
// http2::DecodeBuffer constructor does not accept nullptr buffer.
if (chunk.data() == nullptr)
continue;
http2::DecodeBuffer fragment(chunk.data(), chunk.size());
decoder.DecodeFragment(&fragment);
}
decoder.EndDecodingBlock();
return 0;
}
|
