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gh-102509: Start initializing ob_digit of _PyLongValue #102510

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merged 3 commits into from
Jul 28, 2023
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gh-102509: Start initializing ob_digit of _PyLongValue #102510

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e13f099
gh-102509: Start initializing `ob_digit` of `_PyLongValue`
illia-v Mar 7, 2023
3d240a8
Merge branch 'main' into gh-102509
illia-v Mar 13, 2023
d1016a6
Merge branch 'main' into gh-102509
illia-v Jul 28, 2023
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Security/2023-03-07-21-46-29.gh-issue-102509.5ouaH_.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Start initializing ``ob_digit`` during creation of :c:type:`PyLongObject`
objects. Patch by Illia Volochii.
3 changes: 3 additions & 0 deletions Objects/longobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -163,6 +163,9 @@ _PyLong_New(Py_ssize_t size)
}
_PyLong_SetSignAndDigitCount(result, size != 0, size);
_PyObject_Init((PyObject*)result, &PyLong_Type);
/* The digit has to be initialized explicitly to avoid
* use-of-uninitialized-value. */
result->long_value.ob_digit[0] = 0;
return result;
}

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