1 files changed, 7 insertions, 0 deletions
diff --git a/Objects/abstract.c b/Objects/abstract.c
index 5ac4ac9..ed5e196 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -2710,6 +2710,13 @@ _PySequence_BytesToCharpArray(PyObject* self)
     if (argc == -1)
         return NULL;
 
+    assert(argc >= 0);
+
+    if ((size_t)argc > (PY_SSIZE_T_MAX-sizeof(char *)) / sizeof(char *)) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+
     array = malloc((argc + 1) * sizeof(char *));
     if (array == NULL) {
         PyErr_NoMemory();