libxml2/backport-malloc-fail-Fix-use-after-free-in-xmlXIncludeAddNode.patch
zhuofeng feb7e8218d backport upstream patches
(cherry picked from commit ec64ed27a9add0f7a9bf6ee351ad67302a60c383)
2023-06-20 11:16:46 +08:00

38 lines
1.0 KiB
Diff

From ae6fa0521c34449b54f9cb3257a4df9b79f3212f Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Wed, 2 Nov 2022 16:13:27 +0100
Subject: [PATCH 11/28] malloc-fail: Fix use-after-free in xmlXIncludeAddNode
Found with libFuzzer, see #344.
Reference: https://github.com/GNOME/libxml2/commit/5a19e21605398cef6a8b1452477a8705cb41562b
Conflict: xinclude.c:<xmlXIncludeAddNode>
---
xinclude.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/xinclude.c b/xinclude.c
index cd1e1b1..e5e3b16 100644
--- a/xinclude.c
+++ b/xinclude.c
@@ -612,14 +612,15 @@ xmlXIncludeAddNode(xmlXIncludeCtxtPtr ctxt, xmlNodePtr cur) {
}
URL = xmlSaveUri(uri);
xmlFreeURI(uri);
- xmlFree(URI);
if (URL == NULL) {
xmlXIncludeErr(ctxt, cur, XML_XINCLUDE_HREF_URI,
"invalid value URI %s\n", URI);
if (fragment != NULL)
xmlFree(fragment);
+ xmlFree(URI);
return(-1);
}
+ xmlFree(URI);
if (xmlStrEqual(URL, ctxt->doc->URL))
local = 1;
--
2.27.0