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[3.12] gh-106350: Tkinter: do not ignore return value of mp_init() (GH-106351) (GH-107258)

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(cherry picked from commit b5ae7c4984)

Co-authored-by: Christopher Chavez <chrischavez@gmx.us>
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Miss Islington (bot) 2023-07-26 00:58:33 -07:00 • committed by GitHub
parent ef808517f4
commit d2355426d6
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2 changed files with 5 additions and 2 deletions
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2
Misc/NEWS.d/next/Library/2023-07-03-03-46-20.gh-issue-106350.LLcTEe.rst Normal file
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@ -0,0 +1,2 @@
Detect possible memory allocation failure in the libtommath function :c:func:`mp_init`
used by the ``_tkinter`` module.

5
Modules/_tkinter.c
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@ -876,8 +876,9 @@ asBignumObj(PyObject *value)
return NULL;
}
hexchars += neg + 2; /* skip sign and "0x" */
mp_init(&bigValue);
if (mp_read_radix(&bigValue, hexchars, 16) != MP_OKAY) {
if (mp_init(&bigValue) != MP_OKAY ||
mp_read_radix(&bigValue, hexchars, 16) != MP_OKAY)
{
mp_clear(&bigValue);
Py_DECREF(hexstr);
PyErr_NoMemory();