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gh-106350: Tkinter: do not ignore return value of `mp_init()` (GH-106351)

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Christopher Chavez 2023-07-25 13:52:07 -05:00 committed by GitHub
parent 2b1a81e2cf
commit b5ae7c4984
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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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@ -874,8 +874,9 @@ 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();