[Python-checkins] bpo-40479: Fix undefined behavior in Modules/_hashopenssl.c (GH-31153)

[miss-islington]

https://github.com/python/cpython/commit/3ceff9968be059209f0d7271365f38895207b24d
commit: 3ceff9968be059209f0d7271365f38895207b24d
branch: 3.10
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: miss-islington <31488909+miss-islington at users.noreply.github.com>
date: 2022-02-07T00:05:29-08:00
summary:

bpo-40479: Fix undefined behavior in Modules/_hashopenssl.c (GH-31153)


va_end() must be called before returning.
(cherry picked from commit 59e004af63742361b67d1e1ae70229ff0db1059d)

Co-authored-by: Zackery Spytz <zspytz at gmail.com>

files:
A Misc/NEWS.d/next/Core and Builtins/2022-02-06-23-08-30.bpo-40479.zED3Zu.rst
M Modules/_hashopenssl.c

diff --git a/Misc/NEWS.d/next/Core and Builtins/2022-02-06-23-08-30.bpo-40479.zED3Zu.rst b/Misc/NEWS.d/next/Core and Builtins/2022-02-06-23-08-30.bpo-40479.zED3Zu.rst
new file mode 100644
index 0000000000000..52701d53d8fe2
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2022-02-06-23-08-30.bpo-40479.zED3Zu.rst	
@@ -0,0 +1 @@
+Add a missing call to ``va_end()`` in ``Modules/_hashopenssl.c``.
diff --git a/Modules/_hashopenssl.c b/Modules/_hashopenssl.c
index 2eaa5f7d85d80..65538f63f7bf4 100644
--- a/Modules/_hashopenssl.c
+++ b/Modules/_hashopenssl.c
@@ -266,6 +266,7 @@ _setException(PyObject *exc, const char* altmsg, ...)
         } else {
             PyErr_FormatV(exc, altmsg, vargs);
         }
+        va_end(vargs);
         return NULL;
     }
     va_end(vargs);