From: Serhiy Storchaka <storchaka@gmail.com>
Date: Sat, 2 Jan 2021 10:24:27 +0000 (+0200)
Subject: [3.9] bpo-42425: Fix possible leak in initialization of errmap for OSError (GH-23446... 
X-Git-Tag: v3.9.2rc1~78
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=7695d832565914efcedcc885feb129f5102aec90;p=thirdparty%2FPython%2Fcpython.git

[3.9] bpo-42425: Fix possible leak in initialization of errmap for OSError (GH-23446). (GH-24057)

(cherry picked from commit ed1007c0d74e658d1e6c9b51b12ce7501eb8cbf9)
---

diff --git a/Objects/exceptions.c b/Objects/exceptions.c
index e44ce727aff1..eb72de53e98c 100644
--- a/Objects/exceptions.c
+++ b/Objects/exceptions.c
@@ -2531,8 +2531,10 @@ _PyExc_Init(void)
     do { \
         PyObject *_code = PyLong_FromLong(CODE); \
         assert(_PyObject_RealIsSubclass(PyExc_ ## TYPE, PyExc_OSError)); \
-        if (!_code || PyDict_SetItem(errnomap, _code, PyExc_ ## TYPE)) \
+        if (!_code || PyDict_SetItem(errnomap, _code, PyExc_ ## TYPE)) { \
+            Py_XDECREF(_code); \
             return _PyStatus_ERR("errmap insertion problem."); \
+        } \
         Py_DECREF(_code); \
     } while (0)