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[3.13] gh-127165: Disallow embedded NULL characters in _interpreters (GH-127199) (#127463)

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gh-127165: Disallow embedded NULL characters in `_interpreters` (GH-127199)
(cherry picked from commit 46bfd26fb2)

Co-authored-by: Peter Bierma <zintensitydev@gmail.com>
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Miss Islington (bot) 2024-12-01 07:55:55 +01:00 • committed by GitHub
parent 5017c81824
commit 2813a61675
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2 changed files with 9 additions and 0 deletions
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4
Lib/test/test_interpreters/test_api.py
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@ -1650,6 +1650,10 @@ class LowLevelTests(TestBase):
self.assertIs(after2, None) self.assertIs(after2, None)
self.assertEqual(after3.type.__name__, 'AssertionError') self.assertEqual(after3.type.__name__, 'AssertionError')
with self.assertRaises(ValueError):
# GH-127165: Embedded NULL characters broke the lookup
_interpreters.set___main___attrs(interpid, {"\x00": 1})
with self.subTest('from C-API'): with self.subTest('from C-API'):
with self.interpreter_from_capi() as interpid: with self.interpreter_from_capi() as interpid:
with self.assertRaisesRegex(InterpreterError, 'unrecognized'): with self.assertRaisesRegex(InterpreterError, 'unrecognized'):

5
Python/crossinterp.c
View file

@ -346,6 +346,11 @@ _copy_string_obj_raw(PyObject *strobj, Py_ssize_t *p_size)
return NULL; return NULL;
} }
if (size != (Py_ssize_t)strlen(str)) {
PyErr_SetString(PyExc_ValueError, "found embedded NULL character");
return NULL;
}
char *copied = PyMem_RawMalloc(size+1); char *copied = PyMem_RawMalloc(size+1);
if (copied == NULL) { if (copied == NULL) {
PyErr_NoMemory(); PyErr_NoMemory();