From: Shamil <ashm.tech@proton.me>
Date: Mon, 20 Oct 2025 09:29:23 +0000 (+0300)
Subject: gh-140301: Fix memory leak in subinterpreter `PyConfig` cleanup (#140303)
X-Git-Tag: v3.15.0a2~385
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a615fb49c948902a982c3256899507abcc9f9bc8;p=thirdparty%2FPython%2Fcpython.git

gh-140301: Fix memory leak in subinterpreter `PyConfig` cleanup (#140303)

Co-authored-by: Kumar Aditya <kumaraditya@python.org>
---

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-10-18-18-08-36.gh-issue-140301.m-2HxC.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-10-18-18-08-36.gh-issue-140301.m-2HxC.rst
new file mode 100644
index 000000000000..8b1c81c04ece
--- /dev/null
+++ b/Misc/NEWS.d/next/Core_and_Builtins/2025-10-18-18-08-36.gh-issue-140301.m-2HxC.rst
@@ -0,0 +1 @@
+Fix memory leak of ``PyConfig`` in subinterpreters.
diff --git a/Python/pystate.c b/Python/pystate.c
index af7828d6a030..955457cdcf5c 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -963,6 +963,8 @@ PyInterpreterState_Delete(PyInterpreterState *interp)
 
     _PyObject_FiniState(interp);
 
+    PyConfig_Clear(&interp->config);
+
     free_interpreter(interp);
 }