Issue #13013: ctypes: Fix a reference leak in PyCArrayType_from_ctype.

Thanks to Suman Saha for finding the bug and providing a patch.

3 files changed, 5 insertions, 0 deletions

diff --git a/Misc/ACKS b/Misc/ACKS
index e728c511e1..6c02a79c7a 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -720,6 +720,7 @@ Sam Rushing
 Mark Russell
 Nick Russo
 Sébastien Sablé
+Suman Saha
 Hajime Saitou
 George Sakkis
 Rich Salz
diff --git a/Misc/NEWS b/Misc/NEWS
index c4f0cb09fe..132ea5e08b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -207,6 +207,9 @@ Library
 Extension Modules
 -----------------
 
+- Issue #13013: ctypes: Fix a reference leak in PyCArrayType_from_ctype.
+  Thanks to Suman Saha for finding the bug and providing a patch.
+
 - Issue #13022: Fix: _multiprocessing.recvfd() doesn't check that
   file descriptor was actually received.
 
diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
index c4d08901cd..4ae2c4133e 100644
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -4678,6 +4678,7 @@ PyCArrayType_from_ctype(PyObject *itemtype, Py_ssize_t length)
     if (!PyType_Check(itemtype)) {
         PyErr_SetString(PyExc_TypeError,
                         "Expected a type object");
+        Py_DECREF(key);
         return NULL;
     }
 #ifdef MS_WIN64