| // Copyright 2019 The Chromium OS 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 "arc/obb-mounter/mount_obb_fuse_main.h" |
| |
| #include <cstddef> |
| #include <cstdint> |
| #include <fuse/fuse.h> |
| #include <string> |
| |
| #include <base/files/file.h> |
| #include <base/files/file_path.h> |
| #include <base/files/scoped_temp_dir.h> |
| #include <fuzzer/FuzzedDataProvider.h> |
| |
| #include "arc/obb-mounter/volume.h" |
| |
| namespace { |
| |
| constexpr int kRandomIDMaxLength = 32; |
| constexpr int kRandomFilePathMaxLength = 128; |
| |
| bool IgnoreLogging(int, const char*, int, size_t, const std::string&) { |
| return true; |
| } |
| |
| } // namespace |
| |
| |
| class Environment { |
| public: |
| Environment() { |
| // Need to disable logging |
| logging::SetLogMessageHandler(&IgnoreLogging); |
| } |
| }; |
| |
| extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { |
| static Environment env; |
| FuzzedDataProvider data_provider(data, size); |
| // Create string arguments first |
| const std::string& mount_path = |
| data_provider.ConsumeRandomLengthString(kRandomFilePathMaxLength); |
| const std::string& owner_uid = |
| data_provider.ConsumeRandomLengthString(kRandomIDMaxLength); |
| const std::string& owner_gid = |
| data_provider.ConsumeRandomLengthString(kRandomIDMaxLength); |
| |
| // Create a temporary directory to hold the created file |
| base::ScopedTempDir temp_dir; |
| CHECK(temp_dir.CreateUniqueTempDir()); |
| base::FilePath file_path = temp_dir.GetPath().Append("tmpFile"); |
| |
| // Put all remaining bytes in the file. |
| auto path = base::FilePath(file_path); |
| base::File file(path, |
| base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE); |
| if (!file.created()) { |
| LOG(ERROR) << "Failed to create " << file_path.value(); |
| return 0; |
| } |
| |
| const std::string& file_contents = |
| data_provider.ConsumeRemainingBytesAsString(); |
| file.Write(0, file_contents.c_str(), file_contents.length()); |
| |
| mount_obb_fuse_main(path.value(), |
| file_path.value(), |
| mount_path, |
| owner_uid, |
| owner_gid); |
| |
| return 0; |
| } |