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Issue #8650: Make zlib.[de]compressobj().[de]compress() 64-bit clean.

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Raise an OverflowError if the input data is too large, instead of silently
truncating the input and returning an incorrect result.
This commit is contained in:
Nadeem Vawda 2011-05-15 00:19:50 +02:00
parent 84aacf8912
commit 0c3d96ae1d
3 changed files with 39 additions and 14 deletions
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11
Lib/test/test_zlib.py
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@ -523,6 +523,17 @@ class CompressObjectTestCase(BaseCompressTestCase, unittest.TestCase):
decompress = lambda s: d.decompress(s) + d.flush()
self.check_big_decompress_buffer(size, decompress)
@precisionbigmemtest(size=_4G + 100, memuse=1)
def test_length_overflow(self, size):
if size < _4G + 100:
self.skipTest("not enough free memory, need at least 4 GB")
data = b'x' * size
try:
self.assertRaises(OverflowError, zlib.compress, data, 1)
self.assertRaises(OverflowError, zlib.decompress, data)
finally:
data = None
def genblock(seed, length, step=1024, generator=random):
"""length-byte stream of random data from a seed (in step-byte blocks)."""