From: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Date: Thu, 6 Oct 2022 17:18:19 +0000 (+0530)
Subject: GH-88050: fix race in closing subprocess pipe in asyncio  (#97951)
X-Git-Tag: v3.12.0a1~222
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e2e6b95c0342247ed1a761b6e149ac579a8722dd;p=thirdparty%2FPython%2Fcpython.git

GH-88050: fix race in closing subprocess pipe in asyncio  (#97951)

Check for None when iterating over `self._pipes.values()`.
---

diff --git a/Lib/asyncio/base_subprocess.py b/Lib/asyncio/base_subprocess.py
index c2ca4a2792f6..e15bb4141fc0 100644
--- a/Lib/asyncio/base_subprocess.py
+++ b/Lib/asyncio/base_subprocess.py
@@ -216,7 +216,9 @@ class BaseSubprocessTransport(transports.SubprocessTransport):
             self._proc.returncode = returncode
         self._call(self._protocol.process_exited)
         for p in self._pipes.values():
-            p.pipe.close()
+            if p is not None:
+                p.pipe.close()
+
         self._try_finish()
 
     async def _wait(self):