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 a1edc77b2f..6845faaac6 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -774,6 +774,7 @@ 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 1b0373663e..b5c75b49cd 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -82,6 +82,9 @@ Tests
 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 17a00f5c19..8f378e246d 100644
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -4474,6 +4474,7 @@ 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