oss-fuzz/projects/pyyaml/fuzz_loader.py

53 lines
1.2 KiB
Python

#!/usr/bin/python3
# Copyright 2021 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import sys
import atheris
with atheris.instrument_imports():
import yaml
@atheris.instrument_func
def TestOneInput(input_bytes):
try:
context = yaml.load(input_bytes, Loader=yaml.FullLoader)
except yaml.YAMLError:
return
except RecursionError:
return
# Anything that is loadable should be emitable.
try:
listed_context = list(context)
except:
return
try:
yaml.emit(listed_context)
except yaml.emitter.EmitterError:
return
except RecursionError:
return
def main():
atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
atheris.Fuzz()
if __name__ == "__main__":
main()