Pillow/Tests/oss-fuzz/test_fuzzers.py

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from __future__ import annotations
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import subprocess
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import sys
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import fuzzers
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import packaging
import pytest
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from PIL import Image, UnidentifiedImageError, features
from Tests.helper import skip_unless_feature
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if sys.platform.startswith("win32"):
pytest.skip("Fuzzer is linux only", allow_module_level=True)
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libjpeg_turbo_version = features.version("libjpeg_turbo")
if libjpeg_turbo_version is not None:
version = packaging.version.parse(libjpeg_turbo_version)
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if version.major == 2 and version.minor == 0:
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pytestmark = pytest.mark.valgrind_known_error(
reason="Known failing with libjpeg_turbo 2.0"
)
@pytest.mark.parametrize(
"path",
subprocess.check_output("find Tests/images -type f", shell=True).split(b"\n"),
)
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def test_fuzz_images(path: str) -> None:
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fuzzers.enable_decompressionbomb_error()
try:
with open(path, "rb") as f:
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fuzzers.fuzz_image(f.read())
assert True
except (
OSError,
SyntaxError,
MemoryError,
ValueError,
NotImplementedError,
OverflowError,
):
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# Known exceptions that are through from Pillow
assert True
except (
Image.DecompressionBombError,
Image.DecompressionBombWarning,
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UnidentifiedImageError,
):
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# Known Image.* exceptions
assert True
finally:
fuzzers.disable_decompressionbomb_error()
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@skip_unless_feature("freetype2")
@pytest.mark.parametrize(
"path", subprocess.check_output("find Tests/fonts -type f", shell=True).split(b"\n")
)
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def test_fuzz_fonts(path: str) -> None:
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if not path:
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return
with open(path, "rb") as f:
try:
fuzzers.fuzz_font(f.read())
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except (Image.DecompressionBombError, Image.DecompressionBombWarning, OSError):
pass
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assert True