bpo-41995: Handle allocation failure in _tracemalloc and _zoneinfo (GH-22635)
diff --git a/Modules/_zoneinfo.c b/Modules/_zoneinfo.c
index bb32b14..d1e0934 100644
--- a/Modules/_zoneinfo.c
+++ b/Modules/_zoneinfo.c
@@ -904,7 +904,13 @@ load_data(PyZoneInfo_ZoneInfo *self, PyObject *file_obj)
// Load the transition indices and list
self->trans_list_utc =
PyMem_Malloc(self->num_transitions * sizeof(int64_t));
+ if (self->trans_list_utc == NULL) {
+ goto error;
+ }
trans_idx = PyMem_Malloc(self->num_transitions * sizeof(Py_ssize_t));
+ if (trans_idx == NULL) {
+ goto error;
+ }
for (size_t i = 0; i < self->num_transitions; ++i) {
PyObject *num = PyTuple_GetItem(trans_utc, i);
@@ -986,6 +992,9 @@ load_data(PyZoneInfo_ZoneInfo *self, PyObject *file_obj)
// Build _ttinfo objects from utcoff, dstoff and abbr
self->_ttinfos = PyMem_Malloc(self->num_ttinfos * sizeof(_ttinfo));
+ if (self->_ttinfos == NULL) {
+ goto error;
+ }
for (size_t i = 0; i < self->num_ttinfos; ++i) {
PyObject *tzname = PyTuple_GetItem(abbr, i);
if (tzname == NULL) {
@@ -1001,6 +1010,9 @@ load_data(PyZoneInfo_ZoneInfo *self, PyObject *file_obj)
// Build our mapping from transition to the ttinfo that applies
self->trans_ttinfos =
PyMem_Calloc(self->num_transitions, sizeof(_ttinfo *));
+ if (self->trans_ttinfos == NULL) {
+ goto error;
+ }
for (size_t i = 0; i < self->num_transitions; ++i) {
size_t ttinfo_idx = trans_idx[i];
assert(ttinfo_idx < self->num_ttinfos);