Issue #4873: Fix resource leaks in error cases of pwd and grp.

Misc/NEWS

@@ -1067,6 +1067,8 @@ C-API
 Extension Modules
 -----------------
 
+- Issue #4873: Fix resource leaks in error cases of pwd and grp.
+
 - Issue #4751: For hashlib algorithms provided by OpenSSL, the Python
   GIL is now released during computation on data lengths >= 2048 bytes.
 

Modules/grpmodule.c

@@ -76,7 +76,6 @@ mkgrent(struct group *p)
 
     if (PyErr_Occurred()) {
         Py_DECREF(v);
-        Py_DECREF(w);
         return NULL;
     }
 
@@ -139,6 +138,7 @@ grp_getgrall(PyObject *self, PyObject *ignore)
         if (v == NULL || PyList_Append(d, v) != 0) {
             Py_XDECREF(v);
             Py_DECREF(d);
+            endgrent();
             return NULL;
         }
         Py_DECREF(v);

Modules/pwdmodule.c

@@ -160,6 +160,7 @@ pwd_getpwall(PyObject *self)
 		if (v == NULL || PyList_Append(d, v) != 0) {
 			Py_XDECREF(v);
 			Py_DECREF(d);
+			endpwent();
 			return NULL;
 		}
 		Py_DECREF(v);