[3.12] gh-117021: Fix integer overflow in PyLong_AsPid() on non-Windows 64-bit platforms (GH-117064) (GH-117070)

(cherry picked from commit 519b2ae22b54760475bbf62b9558d453c703f9c6)

1 files changed, 13 insertions, 0 deletions

diff --git a/Modules/_testcapi/long.c b/Modules/_testcapi/long.c
index 213c676..9c5a0e3 100644
--- a/Modules/_testcapi/long.c
+++ b/Modules/_testcapi/long.c
@@ -750,6 +750,18 @@ pylong_asvoidptr(PyObject *module, PyObject *arg)
     return Py_NewRef((PyObject *)value);
 }
 
+static PyObject *
+pylong_aspid(PyObject *module, PyObject *arg)
+{
+    NULLABLE(arg);
+    pid_t value = PyLong_AsPid(arg);
+    if (value == -1 && PyErr_Occurred()) {
+        return NULL;
+    }
+    return PyLong_FromPid(value);
+}
+
+
 static PyMethodDef test_methods[] = {
     {"test_long_and_overflow",  test_long_and_overflow,          METH_NOARGS},
     {"test_long_api",           test_long_api,                   METH_NOARGS},
@@ -778,6 +790,7 @@ static PyMethodDef test_methods[] = {
     {"pylong_as_size_t",            pylong_as_size_t,           METH_O},
     {"pylong_asdouble",             pylong_asdouble,            METH_O},
     {"pylong_asvoidptr",            pylong_asvoidptr,           METH_O},
+    {"pylong_aspid",                pylong_aspid,               METH_O},
     {NULL},
 };