message: tests: Add fuzzing harness for CBufferedFile::{SetPos,GetPos,GetType,GetVersion} (stream.h)
diff: @@ -29,8 +29,9 @@ void test_one_input(const std::vector<uint8_t>& buffer)
  }
  }
  if (opt_buffered_file && fuzzed_file != nullptr) {
  + bool setpos_fail = false;
  while (fuzzed_data_provider.ConsumeBool()) {
  - switch (fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 4)) {
  + switch (fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 5)) {
  case 0: {
  std::array<uint8_t, 4096> arr{};
  try {
  @@ -48,17 +49,30 @@ void test_one_input(const std::vector<uint8_t>& buffer)
  break;
  }
  case 3: {
  + if (!opt_buffered_file->SetPos(fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(0, 4096))) {
  + setpos_fail = true;
  + }
  + break;
  + }
  + case 4: {
  + if (setpos_fail) {
  + // Calling FindByte(...) after a failed SetPos(...) call may result in an infinite loop.
  + break;
  + }
  try {
  opt_buffered_file->FindByte(fuzzed_data_provider.ConsumeIntegral<char>());
  } catch (const std::ios_base::failure&) {
  }
  break;
  }
  - case 4: {
  + case 5: {
  ReadFromStream(fuzzed_data_provider, *opt_buffered_file);
  break;
  }
  }
  }
  + opt_buffered_file->GetPos();
  + opt_buffered_file->GetType();
  + opt_buffered_file->GetVersion();
  }
  }
  