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47 lines
1.4 KiB
Python
47 lines
1.4 KiB
Python
from __future__ import annotations
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import sys
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import pytest
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from PIL import Image
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def test_overflow():
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# There is the potential to overflow comparisons in map.c
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# if there are > SIZE_MAX bytes in the image or if
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# the file encodes an offset that makes
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# (offset + size(bytes)) > SIZE_MAX
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# Note that this image triggers the decompression bomb warning:
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max_pixels = Image.MAX_IMAGE_PIXELS
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Image.MAX_IMAGE_PIXELS = None
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# This image hits the offset test.
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with Image.open("Tests/images/l2rgb_read.bmp") as im:
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with pytest.raises((ValueError, MemoryError, OSError)):
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im.load()
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Image.MAX_IMAGE_PIXELS = max_pixels
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def test_tobytes():
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# Note that this image triggers the decompression bomb warning:
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max_pixels = Image.MAX_IMAGE_PIXELS
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Image.MAX_IMAGE_PIXELS = None
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# Previously raised an access violation on Windows
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with Image.open("Tests/images/l2rgb_read.bmp") as im:
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with pytest.raises((ValueError, MemoryError, OSError)):
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im.tobytes()
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Image.MAX_IMAGE_PIXELS = max_pixels
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@pytest.mark.skipif(sys.maxsize <= 2**32, reason="Requires 64-bit system")
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def test_ysize():
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numpy = pytest.importorskip("numpy", reason="NumPy not installed")
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# Should not raise 'Integer overflow in ysize'
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arr = numpy.zeros((46341, 46341), dtype=numpy.uint8)
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Image.fromarray(arr)
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