From: Victor Stinner <vstinner@python.org>
Date: Fri, 5 Jun 2026 13:43:05 +0000 (+0200)
Subject: gh-146527: Fix memory leak in _PyGC_Fini() (#150969)
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=0036565e81b9580d645862bcc6249e2ae4f1fd03;p=thirdparty%2FPython%2Fcpython.git

gh-146527: Fix memory leak in _PyGC_Fini() (#150969)

Free generation_stats allocated by _PyGC_Init().

Fix Python/gc.c: Python/gc_free_threading.c was already fixed.
---

diff --git a/Python/gc.c b/Python/gc.c
index 54ac1b089e50..201c621bcc3c 100644
--- a/Python/gc.c
+++ b/Python/gc.c
@@ -1876,6 +1876,8 @@ _PyGC_Fini(PyInterpreterState *interp)
     GCState *gcstate = &interp->gc;
     Py_CLEAR(gcstate->garbage);
     Py_CLEAR(gcstate->callbacks);
+    PyMem_RawFree(gcstate->generation_stats);
+    gcstate->generation_stats = NULL;
 
     /* Prevent a subtle bug that affects sub-interpreters that use basic
      * single-phase init extensions (m_size == -1).  Those extensions cause objects