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[3.9] bpo-43499: Restrict co_code to be under INT_MAX in codeobject (GH-20628) (GH-24896)

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(cherry picked from commit 3b3b83c965)
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Ammar Askar 2021-03-17 14:26:38 -04:00 • committed by GitHub
parent 1f0cde6784
commit db73376106
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2 changed files with 11 additions and 1 deletions
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4
Objects/frameobject.c
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@ -397,7 +397,9 @@ frame_setlineno(PyFrameObject *f, PyObject* p_new_lineno, void *Py_UNUSED(ignore
return -1;
}
int len = PyBytes_GET_SIZE(f->f_code->co_code)/sizeof(_Py_CODEUNIT);
/* PyCode_NewWithPosOnlyArgs limits co_code to be under INT_MAX so this
* should never overflow. */
int len = (int)(PyBytes_GET_SIZE(f->f_code->co_code) / sizeof(_Py_CODEUNIT));
int *lines = marklines(f->f_code, len);
if (lines == NULL) {
return -1;