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