#12051: Fix segfault in json.dumps() while encoding highly-nested objects using the C accelerations.

1 files changed, 15 insertions, 2 deletions

diff --git a/Modules/_json.c b/Modules/_json.c
index 4b4ef89..6b321e5 100644
--- a/Modules/_json.c
+++ b/Modules/_json.c
@@ -1999,10 +1999,18 @@ encoder_listencode_obj(PyEncoderObject *s, PyObject *rval, PyObject *obj, Py_ssi
         return _steal_list_append(rval, encoded);
     }
     else if (PyList_Check(obj) || PyTuple_Check(obj)) {
-        return encoder_listencode_list(s, rval, obj, indent_level);
+        if (Py_EnterRecursiveCall(" while encoding a JSON object"))
+            return -1;
+        rv = encoder_listencode_list(s, rval, obj, indent_level);
+        Py_LeaveRecursiveCall();
+        return rv;
     }
     else if (PyDict_Check(obj)) {
-        return encoder_listencode_dict(s, rval, obj, indent_level);
+        if (Py_EnterRecursiveCall(" while encoding a JSON object"))
+            return -1;
+        rv = encoder_listencode_dict(s, rval, obj, indent_level);
+        Py_LeaveRecursiveCall();
+        return rv;
     }
     else {
         PyObject *ident = NULL;
@@ -2028,7 +2036,12 @@ encoder_listencode_obj(PyEncoderObject *s, PyObject *rval, PyObject *obj, Py_ssi
             Py_XDECREF(ident);
             return -1;
         }
+
+        if (Py_EnterRecursiveCall(" while encoding a JSON object"))
+            return -1;
         rv = encoder_listencode_obj(s, rval, newobj, indent_level);
+        Py_LeaveRecursiveCall();
+
         Py_DECREF(newobj);
         if (rv) {
             Py_XDECREF(ident);