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bpo-30640: Fix undefined behavior in _PyFunction_FastCallDict() and PyEval_EvalCodeEx() (#2919) 

k + 1 was calculated with k = NULL.
This commit is contained in:
Zackery Spytz 2017-07-31 08:24:37 -06:00 committed by Serhiy Storchaka
parent a568e52733
commit c6ea8974e2
2 changed files with 3 additions and 2 deletions
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2
Objects/call.c
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@ -374,7 +374,7 @@ _PyFunction_FastCallDict(PyObject *func, PyObject **args, Py_ssize_t nargs,
result = _PyEval_EvalCodeWithName((PyObject*)co, globals, (PyObject *)NULL,
args, nargs,
k, k + 1, nk, 2,
k, k != NULL ? k + 1 : NULL, nk, 2,
d, nd, kwdefs,
closure, name, qualname);
Py_XDECREF(kwtuple);

3
Python/ceval.c
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@ -4220,7 +4220,8 @@ PyEval_EvalCodeEx(PyObject *_co, PyObject *globals, PyObject *locals,
{
return _PyEval_EvalCodeWithName(_co, globals, locals,
args, argcount,
kws, kws + 1, kwcount, 2,
kws, kws != NULL ? kws + 1 : NULL,
kwcount, 2,
defs, defcount,
kwdefs, closure,
NULL, NULL);