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* In some circumstances with some versions of libtiff (4.1.0+), there could be a 4 byte out of bound write when decoding a YCbCr tiff. * The Pillow code dates to 6.0.0 * Found and reported through Tidelift
42 lines
1.1 KiB
Python
42 lines
1.1 KiB
Python
# Reproductions/tests for crashes/read errors in TiffDecode.c
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# When run in Python, all of these images should fail for
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# one reason or another, either as a buffer overrun,
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# unrecognized datastream, or truncated image file.
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# There shouldn't be any segfaults.
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#
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# if run like
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# `valgrind --tool=memcheck pytest test_tiff_crashes.py 2>&1 | grep TiffDecode.c`
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# the output should be empty. There may be Python issues
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# in the valgrind especially if run in a debug Python
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# version.
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import pytest
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from PIL import Image
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from .helper import on_ci
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@pytest.mark.parametrize(
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"test_file",
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[
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"Tests/images/crash_1.tif",
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"Tests/images/crash_2.tif",
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"Tests/images/crash-2020-10-test.tif",
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],
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)
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@pytest.mark.filterwarnings("ignore:Possibly corrupt EXIF data")
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@pytest.mark.filterwarnings("ignore:Metadata warning")
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def test_tiff_crashes(test_file):
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try:
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with Image.open(test_file) as im:
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im.load()
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except FileNotFoundError:
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if not on_ci():
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pytest.skip("test image not found")
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return
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raise
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except OSError:
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pass
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