From 646e27faa965ad61f85d06b28df85236eb9bbce1 Mon Sep 17 00:00:00 2001
From: KIMDONGYEON00 <dongyeonkim2000@gmail.com>
Date: Tue, 15 Jul 2025 01:50:17 +0900
Subject: [PATCH] CVE-2024-45492

---
 third_party/python/Modules/expat/xmlparse.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/third_party/python/Modules/expat/xmlparse.c b/third_party/python/Modules/expat/xmlparse.c
index 7c1720b9d..0fb9971bc 100644
--- a/third_party/python/Modules/expat/xmlparse.c
+++ b/third_party/python/Modules/expat/xmlparse.c
@@ -6145,6 +6145,15 @@ static int nextScaffoldPart(XML_Parser parser) {
   int next;
 
   if (!dtd->scaffIndex) {
+    /* Detect and prevent integer overflow.
+     * The preprocessor guard addresses the "always false" warning
+     * from -Wtype-limits on platforms where
+     * sizeof(unsigned int) < sizeof(size_t), e.g. on x86_64. */
+#if UINT_MAX >= SIZE_MAX
+    if (parser->m_groupSize > ((size_t)(-1) / sizeof(int))) {
+      return -1;
+    }
+#endif
     dtd->scaffIndex = (int *)MALLOC(parser, parser->m_groupSize * sizeof(int));
     if (!dtd->scaffIndex) return -1;
     dtd->scaffIndex[0] = 0;