diff options
| author | Zackery Spytz <zspytz@gmail.com> | 2019-05-17 07:13:03 (GMT) |
|---|---|---|
| committer | Serhiy Storchaka <storchaka@gmail.com> | 2019-05-17 07:13:03 (GMT) |
| commit | 14514d9084a40f599c57da853a305aa264562a43 (patch) | |
| tree | 36cb61b74dbfda9ce1cdf72a864b640d0bda546d /Objects/unicodeobject.c | |
| parent | 870b035bc6da96689b59dd6f79782ec6f1873617 (diff) | |
| download | cpython-14514d9084a40f599c57da853a305aa264562a43.zip cpython-14514d9084a40f599c57da853a305aa264562a43.tar.gz cpython-14514d9084a40f599c57da853a305aa264562a43.tar.bz2 | |
bpo-36946: Fix possible signed integer overflow when handling slices. (GH-13375)
The final addition (cur += step) may overflow, so use size_t for "cur".
"cur" is always positive (even for negative steps), so it is safe to use
size_t here.
Co-Authored-By: Martin Panter <vadmium+py@gmail.com>
Diffstat (limited to 'Objects/unicodeobject.c')
| -rw-r--r-- | Objects/unicodeobject.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c index eaba583..0aa5e4a 100644 --- a/Objects/unicodeobject.c +++ b/Objects/unicodeobject.c @@ -13991,7 +13991,8 @@ unicode_subscript(PyObject* self, PyObject* item) i += PyUnicode_GET_LENGTH(self); return unicode_getitem(self, i); } else if (PySlice_Check(item)) { - Py_ssize_t start, stop, step, slicelength, cur, i; + Py_ssize_t start, stop, step, slicelength, i; + size_t cur; PyObject *result; void *src_data, *dest_data; int src_kind, dest_kind; |