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author | Jeroen Demeyer <J.Demeyer@UGent.be> | 2019-05-22 14:52:13 +0200 |
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committer | Petr Viktorin <pviktori@redhat.com> | 2019-05-22 14:52:13 +0200 |
commit | d092caf096fa48baadfc0900792206bb5aa0192d (patch) | |
tree | abf22ad34897b4715b6f80d511aff99bf1ea9375 /Objects | |
parent | 791e5fcbab9e444b62d13d08707cbbbeb9406297 (diff) | |
download | cpython-git-d092caf096fa48baadfc0900792206bb5aa0192d.tar.gz |
bpo-36907: fix refcount bug in _PyStack_UnpackDict() (GH-13381) (GH-13493)
Diffstat (limited to 'Objects')
-rw-r--r-- | Objects/call.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/Objects/call.c b/Objects/call.c index e6076e7005..1209ed3977 100644 --- a/Objects/call.c +++ b/Objects/call.c @@ -542,10 +542,14 @@ _PyMethodDef_RawFastCallDict(PyMethodDef *method, PyObject *self, } result = (*fastmeth) (self, stack, nargs, kwnames); - if (stack != args) { + if (kwnames != NULL) { + Py_ssize_t i, n = nargs + PyTuple_GET_SIZE(kwnames); + for (i = 0; i < n; i++) { + Py_DECREF(stack[i]); + } PyMem_Free((PyObject **)stack); + Py_DECREF(kwnames); } - Py_XDECREF(kwnames); break; } @@ -1379,8 +1383,11 @@ _PyStack_UnpackDict(PyObject *const *args, Py_ssize_t nargs, PyObject *kwargs, return -1; } - /* Copy position arguments (borrowed references) */ - memcpy(stack, args, nargs * sizeof(stack[0])); + /* Copy positional arguments */ + for (i = 0; i < nargs; i++) { + Py_INCREF(args[i]); + stack[i] = args[i]; + } kwstack = stack + nargs; pos = i = 0; @@ -1389,8 +1396,8 @@ _PyStack_UnpackDict(PyObject *const *args, Py_ssize_t nargs, PyObject *kwargs, called in the performance critical hot code. */ while (PyDict_Next(kwargs, &pos, &key, &value)) { Py_INCREF(key); + Py_INCREF(value); PyTuple_SET_ITEM(kwnames, i, key); - /* The stack contains borrowed references */ kwstack[i] = value; i++; } |