Merge branch 'PHP-8.2' into PHP-8.3

* PHP-8.2:
  Fix GH-16808: Segmentation fault in RecursiveIteratorIterator->current() with a xml element input

NEWS

@@ -40,6 +40,10 @@ PHP                                                                        NEWS
   . Fixed bug GH-16695 (phar:// tar parser and zero-length file header blocks).
     (nielsdos, Hans Krentel)
 
+- SimpleXML:
+  . Fixed bug GH-16808 (Segmentation fault in RecursiveIteratorIterator
+    ->current() with a xml element input). (nielsdos)
+
 - SOAP:
   . Fix make check being invoked in ext/soap. (Ma27)
 

ext/simplexml/simplexml.c

@@ -2532,7 +2532,11 @@ static zval *php_sxe_iterator_current_data(zend_object_iterator *iter) /* {{{ */
 {
 	php_sxe_iterator *iterator = (php_sxe_iterator *)iter;
 
-	return &iterator->sxe->iter.data;
+	zval *data = &iterator->sxe->iter.data;
+	if (Z_ISUNDEF_P(data)) {
+		return NULL;
+	}
+	return data;
 }
 /* }}} */
 

ext/simplexml/tests/gh16808.phpt

@@ -0,0 +1,12 @@
+--TEST--
+GH-16808 (Segmentation fault in RecursiveIteratorIterator->current() with a xml element input)
+--EXTENSIONS--
+simplexml
+--FILE--
+<?php
+$sxe = new SimpleXMLElement("<root />");
+$test = new RecursiveIteratorIterator($sxe);
+var_dump($test->current());
+?>
+--EXPECT--
+NULL