mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-15 02:44:23 -05:00
32 lines
1.1 KiB
Diff
32 lines
1.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Sebastian Pipping <sebastian@pipping.org>
|
|
Date: Mon, 19 Aug 2024 22:34:13 +0200
|
|
Subject: [PATCH] lib: Detect integer overflow in dtdCopy
|
|
|
|
Reported by TaiYou
|
|
---
|
|
lib/xmlparse.c | 10 ++++++++++
|
|
1 file changed, 10 insertions(+)
|
|
|
|
diff --git a/lib/xmlparse.c b/lib/xmlparse.c
|
|
index 02f71c4..18fcad0 100644
|
|
--- a/lib/xmlparse.c
|
|
+++ b/lib/xmlparse.c
|
|
@@ -6358,6 +6358,16 @@ dtdCopy(XML_Parser oldParser, DTD *newDtd, const DTD *oldDtd,
|
|
if (! newE)
|
|
return 0;
|
|
if (oldE->nDefaultAtts) {
|
|
+ /* Detect and prevent integer overflow.
|
|
+ * The preprocessor guard addresses the "always false" warning
|
|
+ * from -Wtype-limits on platforms where
|
|
+ * sizeof(int) < sizeof(size_t), e.g. on x86_64. */
|
|
+#if UINT_MAX >= SIZE_MAX
|
|
+ if ((size_t)oldE->nDefaultAtts
|
|
+ > ((size_t)(-1) / sizeof(DEFAULT_ATTRIBUTE))) {
|
|
+ return 0;
|
|
+ }
|
|
+#endif
|
|
newE->defaultAtts = (DEFAULT_ATTRIBUTE *)ms->malloc_fcn(
|
|
oldE->nDefaultAtts * sizeof(DEFAULT_ATTRIBUTE));
|
|
if (! newE->defaultAtts) {
|