From 84ee621d24b07c3b2b6cf1715b4632cf4625b163 Mon Sep 17 00:00:00 2001
From: Mark Shannon <mark@hotpy.org>
Date: Fri, 4 Aug 2023 22:18:54 +0100
Subject: [PATCH 1/3] Add audit hook for sys.monitoring.register_callback

---
 Python/instrumentation.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Python/instrumentation.c b/Python/instrumentation.c
index 123c20dfe1a99b..6461a00d00ee58 100644
--- a/Python/instrumentation.c
+++ b/Python/instrumentation.c
@@ -1861,6 +1861,9 @@ monitoring_register_callback_impl(PyObject *module, int tool_id, int event,
         PyErr_Format(PyExc_ValueError, "invalid event %d", event);
         return NULL;
     }
+    if (PySys_Audit("sys.monitoring.register_callback", "O", func) < 0) {
+        return NULL;
+    }
     if (func == Py_None) {
         func = NULL;
     }

From bddfc1818a0b629faa6c2936982db6eef673f9fe Mon Sep 17 00:00:00 2001
From: Mark Shannon <mark@hotpy.org>
Date: Sat, 5 Aug 2023 03:48:13 +0100
Subject: [PATCH 2/3] Add test

---
 Lib/test/audit-tests.py | 11 +++++++++++
 Lib/test/test_audit.py  | 13 +++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/Lib/test/audit-tests.py b/Lib/test/audit-tests.py
index 0edc9d9c472766..9504829e96f00e 100644
--- a/Lib/test/audit-tests.py
+++ b/Lib/test/audit-tests.py
@@ -514,6 +514,17 @@ def test_not_in_gc():
             assert hook not in o
 
 
+def test_sys_monitoring_register_callback():
+    import sys
+
+    def hook(event, args):
+        if event.startswith("sys.monitoring"):
+            print(event, args)
+
+    sys.addaudithook(hook)
+    sys.monitoring.register_callback(1, 1, None)
+
+
 if __name__ == "__main__":
     from test.support import suppress_msvcrt_asserts
 
diff --git a/Lib/test/test_audit.py b/Lib/test/test_audit.py
index 0b69864751d83d..b12ffa5d872e83 100644
--- a/Lib/test/test_audit.py
+++ b/Lib/test/test_audit.py
@@ -257,5 +257,18 @@ def test_not_in_gc(self):
             self.fail(stderr)
 
 
+    def test_sys_monitoring_register_callback(self):
+        returncode, events, stderr = self.run_python("test_sys_monitoring_register_callback")
+        if returncode:
+            self.fail(stderr)
+
+        if support.verbose:
+            print(*events, sep='\n')
+        actual = [(ev[0], ev[2]) for ev in events]
+        expected = [("sys.monitoring.register_callback", "(None,)")]
+
+        self.assertEqual(actual, expected)
+
+
 if __name__ == "__main__":
     unittest.main()

From 8f3681311bdfdd709629489dc0efcf571fb8d3e1 Mon Sep 17 00:00:00 2001
From: Mark Shannon <mark@hotpy.org>
Date: Sat, 5 Aug 2023 03:51:20 +0100
Subject: [PATCH 3/3] Add news

---
 .../Security/2023-08-05-03-51-05.gh-issue-107774.VPjaTR.rst    | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Security/2023-08-05-03-51-05.gh-issue-107774.VPjaTR.rst

diff --git a/Misc/NEWS.d/next/Security/2023-08-05-03-51-05.gh-issue-107774.VPjaTR.rst b/Misc/NEWS.d/next/Security/2023-08-05-03-51-05.gh-issue-107774.VPjaTR.rst
new file mode 100644
index 00000000000000..b89b50c79f7e2a
--- /dev/null
+++ b/Misc/NEWS.d/next/Security/2023-08-05-03-51-05.gh-issue-107774.VPjaTR.rst
@@ -0,0 +1,3 @@
+PEP 669 specifies that ``sys.monitoring.register_callback`` will generate an
+audit event. Pre-releases of Python 3.12 did not generate the audit event.
+This is now fixed.