blob: 491732eff56215f910c08b9ca75522f2e5f2a6da [file] [log] [blame]
// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/filter/gzip_source_stream.h"
#include <fuzzer/FuzzedDataProvider.h>
#include <algorithm>
#include <memory>
#include "base/memory/ref_counted.h"
#include "net/base/io_buffer.h"
#include "net/base/test_completion_callback.h"
#include "net/filter/fuzzed_source_stream.h"
// Fuzzer for GzipSourceStream.
// |data| is used to create a FuzzedSourceStream.
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
FuzzedDataProvider data_provider(data, size);
auto fuzzed_source_stream =
// Bound the total number of reads. Gzip has a maximum compression ratio of
// 1032x. While, strictly speaking, linear, this means the fuzzer will often
// get stuck. Bound the number of reads rather than the size of the output
// because lots of 1-byte chunks is also a problem.
const size_t kMaxReads = 10 * 1024;
const net::SourceStream::SourceType kGzipTypes[] = {
net::SourceStream::TYPE_GZIP, net::SourceStream::TYPE_DEFLATE};
net::SourceStream::SourceType type =
std::unique_ptr<net::GzipSourceStream> gzip_stream =
net::GzipSourceStream::Create(std::move(fuzzed_source_stream), type);
size_t num_reads = 0;
while (num_reads < kMaxReads) {
scoped_refptr<net::IOBufferWithSize> io_buffer =
net::TestCompletionCallback callback;
int result = gzip_stream->Read(io_buffer.get(), io_buffer->size(),
// Releasing the pointer to IOBuffer immediately is more likely to lead to a
// use-after-free.
io_buffer = nullptr;
if (callback.GetResult(result) <= 0)
return 0;