[2.7] Issue GH-18560: Fix potential NULL pointer dereference in sum(). (GH-8892)
(cherry picked from commit 704e2d374f88bca83339b95d559b0abce12dc6bd)
Co-authored-by: Christian Heimes <christian@cheimes.de>
diff --git a/Misc/NEWS.d/next/Core and Builtins/2018-08-23-21-32-27.bpo-18560.5q_c1C.rst b/Misc/NEWS.d/next/Core and Builtins/2018-08-23-21-32-27.bpo-18560.5q_c1C.rst
new file mode 100644
index 0000000..4c1f060
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2018-08-23-21-32-27.bpo-18560.5q_c1C.rst
@@ -0,0 +1 @@
+Fix potential NULL pointer dereference in sum().
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 21f6e66..4b819da 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -2363,6 +2363,11 @@
}
/* Either overflowed or is not an int. Restore real objects and process normally */
result = PyInt_FromLong(i_result);
+ if (result == NULL) {
+ Py_DECREF(item);
+ Py_DECREF(iter);
+ return NULL;
+ }
temp = PyNumber_Add(result, item);
Py_DECREF(result);
Py_DECREF(item);