pasta: initial integration (#9114)

Signed-off-by: David Korczynski <david@adalogics.com>

Signed-off-by: David Korczynski <david@adalogics.com>

projects/pasta/Dockerfile

@@ -0,0 +1,19 @@
+#!/usr/bin/python3
+# Copyright 2022 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.
+FROM gcr.io/oss-fuzz-base/base-builder-python
+RUN git clone https://github.com/google/pasta pasta
+RUN python3 -m pip install --upgrade pip && pip install pysecsan
+COPY *.sh *py $SRC/
+WORKDIR $SRC/pasta

projects/pasta/build.sh

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+#!/bin/bash -eu
+# Copyright 2022 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.
+#
+################################################################################
+pip3 install .
+
+# Build fuzzers in $OUT.
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer
+done

projects/pasta/fuzz_parse.py

@@ -0,0 +1,47 @@
+#!/usr/bin/python3
+# Copyright 2022 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
+
+import pasta
+
+# For detecting security-sensitive issues
+import pysecsan
+pysecsan.sanlib.sanitizer_log_level = 30
+pysecsan.add_hooks()
+
+
+@atheris.instrument_func
+def TestOneInput(data):
+  fdp = atheris.FuzzedDataProvider(data)
+  try:
+    pasta.parse(fdp.ConsumeUnicodeNoSurrogates(8096))
+  except (
+    SyntaxError, # thrown by ast fast
+    ValueError,  # thrown by ast fast
+    pasta.base.annotate.AnnotationError, # pasta-thrown error
+    MemoryError # For stack overflows
+  ):
+    pass
+
+
+def main():
+  atheris.instrument_all()
+  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+  atheris.Fuzz()
+
+
+if __name__ == "__main__":
+  main()

projects/pasta/project.yaml

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+fuzzing_engines:
+- libfuzzer
+homepage: https://github.com/google/pasta
+language: python
+main_repo: https://github.com/google/pasta
+sanitizers:
+- address
+- undefined
+vendor_ccs:
+- david@adalogics.com