From 2c31b1e194adc746597eb9ab2310e87e01bf86d4 Mon Sep 17 00:00:00 2001
From: Antony Dovgal <tony2001@php.net>
Date: Mon, 12 Feb 2007 21:06:29 +0000
Subject: [PATCH] fix #40451 (addAttribute() may crash when used with
 non-existent child node)

---
 ext/simplexml/simplexml.c         |  2 +-
 ext/simplexml/tests/bug40451.phpt | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 ext/simplexml/tests/bug40451.phpt

diff --git a/ext/simplexml/simplexml.c b/ext/simplexml/simplexml.c
index 6695f47301..603d1c5f8a 100644
--- a/ext/simplexml/simplexml.c
+++ b/ext/simplexml/simplexml.c
@@ -1526,7 +1526,7 @@ SXE_METHOD(addAttribute)
 
 	node = php_sxe_get_first_node(sxe, node TSRMLS_CC);
 
-	if (node->type != XML_ELEMENT_NODE) {
+	if (node && node->type != XML_ELEMENT_NODE) {
 		node = node->parent;
 	}
 
diff --git a/ext/simplexml/tests/bug40451.phpt b/ext/simplexml/tests/bug40451.phpt
new file mode 100644
index 0000000000..1a499a731d
--- /dev/null
+++ b/ext/simplexml/tests/bug40451.phpt
@@ -0,0 +1,22 @@
+--TEST--
+Bug #40451 (addAttribute() may crash when used with non-existent child node)
+--FILE--
+<?php
+
+$string = <<<XML
+<?xml version="1.0"?>
+	<Host enable="true">
+	 <Name>host.server.com</Name>
+	 </Host>
+XML;
+
+$xml = simplexml_load_string($string);
+
+$add = $xml->addChild('Host');
+$add->Host->addAttribute('enable', 'true');
+
+echo "Done\n";
+?>
+--EXPECTF--	
+Warning: SimpleXMLElement::addAttribute(): Unable to locate parent Element in %s on line %d
+Done
-- 
2.50.1