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gh-126980: Fix bytearray.__buffer__ crash on PyBUF_{READ,WRITE} (#126981)

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Co-authored-by: Victor Stinner <vstinner@python.org>
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sobolevn 2024-11-19 17:44:53 +03:00 committed by GitHub
parent 4d771977b1
commit 3932e1db53
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3 changed files with 14 additions and 2 deletions
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8
Lib/test/test_buffer.py
View File

@ -4439,6 +4439,14 @@ class TestBufferProtocol(unittest.TestCase):
x = ndarray([1,2,3], shape=[3], flags=ND_GETBUF_FAIL)
self.assertRaises(BufferError, memoryview, x)
def test_bytearray_release_buffer_read_flag(self):
# See https://github.com/python/cpython/issues/126980
obj = bytearray(b'abc')
with self.assertRaises(SystemError):
obj.__buffer__(inspect.BufferFlags.READ)
with self.assertRaises(SystemError):
obj.__buffer__(inspect.BufferFlags.WRITE)
@support.cpython_only
def test_pybuffer_size_from_format(self):
# basic tests

3
Misc/NEWS.d/next/Core_and_Builtins/2024-11-18-23-18-17.gh-issue-126980.r8QHdi.rst Normal file
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@ -0,0 +1,3 @@
Fix :meth:`~object.__buffer__` of :class:`bytearray` crashing when
:attr:`~inspect.BufferFlags.READ` or :attr:`~inspect.BufferFlags.WRITE` are
passed as flags.

5
Objects/bytearrayobject.c
View File

@ -52,8 +52,9 @@ bytearray_getbuffer(PyObject *self, Py_buffer *view, int flags)
}
void *ptr = (void *) PyByteArray_AS_STRING(obj);
/* cannot fail if view != NULL and readonly == 0 */
(void)PyBuffer_FillInfo(view, (PyObject*)obj, ptr, Py_SIZE(obj), 0, flags);
if (PyBuffer_FillInfo(view, (PyObject*)obj, ptr, Py_SIZE(obj), 0, flags) < 0) {
return -1;
}
obj->ob_exports++;
return 0;
}