[3.14] gh-140301: Fix memory leak in subinterpreter `PyConfig` cleanup (GH-140303...

gh-140301: Fix memory leak in subinterpreter `PyConfig` cleanup (GH-140303)
(cherry picked from commit a615fb49c948902a982c3256899507abcc9f9bc8)

Co-authored-by: Shamil <ashm.tech@proton.me>
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 (file)
index 0000000..8b1c81c
--- /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 7f365ea50cab7d0a3e694291545214d7f3258a46..06f997fb5ad5becef878fa9a3faedd7ddd25b1fe 100644 (file)
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -1049,6 +1049,8 @@ PyInterpreterState_Delete(PyInterpreterState *interp)
 
     _PyObject_FiniState(interp);
 
+    PyConfig_Clear(&interp->config);
+
     free_interpreter(interp);
 }