File libxml2-CVE-2022-49043.patch of Package libxml2.37957

From 5a19e21605398cef6a8b1452477a8705cb41562b Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Wed, 2 Nov 2022 16:13:27 +0100
Subject: [PATCH] malloc-fail: Fix use-after-free in xmlXIncludeAddNode

Found with libFuzzer, see #344.
---
 xinclude.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: libxml2-2.9.7/xinclude.c
===================================================================
--- libxml2-2.9.7.orig/xinclude.c
+++ libxml2-2.9.7/xinclude.c
@@ -605,14 +605,15 @@ xmlXIncludeAddNode(xmlXIncludeCtxtPtr ct
     }
     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 local and xml then we need a fragment