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[3.10] GH-96187: Prevent _PyCode_GetExtra to return garbage for negative indexes (GH-96188). (#96210)

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(cherry picked from commit 16ebae4cd4)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
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Pablo Galindo Salgado 2022-08-23 15:58:25 +01:00 • committed by GitHub
parent d23ab79952
commit a6c3f6d347
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2 changed files with 3 additions and 1 deletions
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Objects/codeobject.c
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@ -1304,7 +1304,7 @@ _PyCode_GetExtra(PyObject *code, Py_ssize_t index, void **extra)
PyCodeObject *o = (PyCodeObject*) code;
_PyCodeObjectExtra *co_extra = (_PyCodeObjectExtra*) o->co_extra;
if (co_extra == NULL || co_extra->ce_size <= index) {
if (co_extra == NULL || index < 0 || co_extra->ce_size <= index) {
*extra = NULL;
return 0;
}