https://github.com/python/cpython/commit/f835552946e29ec20144c359b8822f9e421d4d64
commit: f835552946e29ec20144c359b8822f9e421d4d64
branch: main
author: Sergey Miryanov <[email protected]>
committer: colesbury <[email protected]>
date: 2025-11-10T11:19:13-05:00
summary:
GH-141212: Fix possible memory leak in gc_mark_span_push (gh-141213)
files:
M Python/gc_free_threading.c
diff --git a/Python/gc_free_threading.c b/Python/gc_free_threading.c
index f39793c3eeb532..b183062eff7952 100644
--- a/Python/gc_free_threading.c
+++ b/Python/gc_free_threading.c
@@ -675,10 +675,11 @@ gc_mark_span_push(gc_span_stack_t *ss, PyObject **start,
PyObject **end)
else {
ss->capacity *= 2;
}
- ss->stack = (gc_span_t *)PyMem_Realloc(ss->stack, ss->capacity *
sizeof(gc_span_t));
- if (ss->stack == NULL) {
+ gc_span_t *new_stack = (gc_span_t *)PyMem_Realloc(ss->stack,
ss->capacity * sizeof(gc_span_t));
+ if (new_stack == NULL) {
return -1;
}
+ ss->stack = new_stack;
}
assert(end > start);
ss->stack[ss->size].start = start;
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