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| author | Mark Shannon <mark@hotpy.org> | 2022-09-10 00:12:06 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-09-10 00:12:06 (GMT) |
| commit | 50a70a083d34305a52fac4f5901bff2ead152d68 (patch) | |
| tree | 0284a73dc74d2d7fc11bed109a9177950d72f38b | |
| parent | 72b29b2611eb7d161958c92993c5050a037d06e4 (diff) | |
| download | cpython-50a70a083d34305a52fac4f5901bff2ead152d68.zip cpython-50a70a083d34305a52fac4f5901bff2ead152d68.tar.gz cpython-50a70a083d34305a52fac4f5901bff2ead152d68.tar.bz2 | |
GH-96678: Fix undefined behavior in ceval.c (#96708)
| -rw-r--r-- | Misc/NEWS.d/next/Core and Builtins/2022-09-09-13-13-27.gh-issue-96678.vMxi9F.rst | 1 | ||||
| -rw-r--r-- | Python/ceval.c | 8 |
2 files changed, 8 insertions, 1 deletions
diff --git a/Misc/NEWS.d/next/Core and Builtins/2022-09-09-13-13-27.gh-issue-96678.vMxi9F.rst b/Misc/NEWS.d/next/Core and Builtins/2022-09-09-13-13-27.gh-issue-96678.vMxi9F.rst new file mode 100644 index 0000000..575b52b --- /dev/null +++ b/Misc/NEWS.d/next/Core and Builtins/2022-09-09-13-13-27.gh-issue-96678.vMxi9F.rst @@ -0,0 +1 @@ +Fix case of undefined behavior in ceval.c diff --git a/Python/ceval.c b/Python/ceval.c index 7d4543e..20d0e1c 100644 --- a/Python/ceval.c +++ b/Python/ceval.c @@ -5532,7 +5532,13 @@ initialize_locals(PyThreadState *tstate, PyFunctionObject *func, /* Pack other positional arguments into the *args argument */ if (co->co_flags & CO_VARARGS) { PyObject *u = NULL; - u = _PyTuple_FromArraySteal(args + n, argcount - n); + if (argcount == n) { + u = Py_NewRef(&_Py_SINGLETON(tuple_empty)); + } + else { + assert(args != NULL); + u = _PyTuple_FromArraySteal(args + n, argcount - n); + } if (u == NULL) { goto fail_post_positional; } |