From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Fri, 5 Jun 2026 14:11:37 +0000 (+0200)
Subject: [3.15] gh-146527: Fix memory leak in _PyGC_Fini() (GH-150969) (#150970)
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=06ffcde725c6ee30c4717bd2c2375f6019d172c1;p=thirdparty%2FPython%2Fcpython.git

[3.15] gh-146527: Fix memory leak in _PyGC_Fini() (GH-150969) (#150970)

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

Free generation_stats allocated by _PyGC_Init().

Fix Python/gc.c: Python/gc_free_threading.c was already fixed.
(cherry picked from commit 0036565e81b9580d645862bcc6249e2ae4f1fd03)

Co-authored-by: Victor Stinner <vstinner@python.org>
---

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