From: Serhiy Storchaka <storchaka@gmail.com>
Date: Sat, 21 Nov 2020 17:17:46 +0000 (+0200)
Subject: bpo-42425: Fix possible leak in initialization of errmap for OSError (GH-23446)
X-Git-Tag: v3.10.0a3~120
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ed1007c0d74e658d1e6c9b51b12ce7501eb8cbf9;p=thirdparty%2FPython%2Fcpython.git

bpo-42425: Fix possible leak in initialization of errmap for OSError (GH-23446)
---

diff --git a/Objects/exceptions.c b/Objects/exceptions.c
index b14da20db0c4..d4824938a0f5 100644
--- a/Objects/exceptions.c
+++ b/Objects/exceptions.c
@@ -2547,8 +2547,10 @@ _PyExc_Init(PyThreadState *tstate)
     do { \
         PyObject *_code = PyLong_FromLong(CODE); \
         assert(_PyObject_RealIsSubclass(PyExc_ ## TYPE, PyExc_OSError)); \
-        if (!_code || PyDict_SetItem(state->errnomap, _code, PyExc_ ## TYPE)) \
+        if (!_code || PyDict_SetItem(state->errnomap, _code, PyExc_ ## TYPE)) { \
+            Py_XDECREF(_code); \
             return _PyStatus_ERR("errmap insertion problem."); \
+        } \
         Py_DECREF(_code); \
     } while (0)