1From e15838ab5454514e53981585c71cd20bb1537d01 Mon Sep 17 00:00:00 2001
2From: Nick Wellnhofer <wellnhofer@aevum.de>
3Date: Sun, 5 Mar 2023 14:09:14 +0100
4Subject: [PATCH] malloc-fail: Fix null deref in xmlSchemaParseWildcardNs
5
6Found with libFuzzer, see #344.
7
8Reference:https://github.com/GNOME/libxml2/commit/e15838ab5454514e53981585c71cd20bb1537d01
9Conflict:NA
10---
11 xmlschemas.c | 2 ++
12 1 file changed, 2 insertions(+)
13
14diff --git a/xmlschemas.c b/xmlschemas.c
15index 9ace2b7..dd79d2e 100644
16--- a/xmlschemas.c
17+++ b/xmlschemas.c
18@@ -6867,6 +6867,8 @@ xmlSchemaParseWildcardNs(xmlSchemaParserCtxtPtr ctxt,
19      */
20     attr = xmlSchemaGetPropNode(node, "namespace");
21     ns = xmlSchemaGetNodeContent(ctxt, (xmlNodePtr) attr);
22+    if (ns == NULL)
23+        return (-1);
24     if ((attr == NULL) || (xmlStrEqual(ns, BAD_CAST "##any")))
25 	wildc->any = 1;
26     else if (xmlStrEqual(ns, BAD_CAST "##other")) {
27-- 
282.27.0
29
30