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Fix GH-16039: Segmentation fault (access null pointer) in ext/dom/parentnode/tree.c #16056

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Fix GH-16039: Segmentation fault (access null pointer) in ext/dom/parentnode/tree.c #16056

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5 changes: 5 additions & 0 deletions ext/dom/parentnode.c
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Original file line number Diff line number Diff line change
Expand Up @@ -272,6 +272,11 @@ static zend_result dom_sanity_check_node_list_for_insertion(php_libxml_ref_obj *
if (instanceof_function(ce, dom_node_class_entry)) {
xmlNodePtr node = dom_object_get_node(Z_DOMOBJ_P(nodes + i));

if (!node) {
php_dom_throw_error(INVALID_STATE_ERR, /* strict */ true);
return FAILURE;
}

if (node->doc != documentNode) {
php_dom_throw_error(WRONG_DOCUMENT_ERR, dom_get_strict_error(document));
return FAILURE;
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31 changes: 31 additions & 0 deletions ext/dom/tests/gh16039.phpt
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@@ -0,0 +1,31 @@
--TEST--
GH-16039 (Segmentation fault (access null pointer) in ext/dom/parentnode/tree.c)
--EXTENSIONS--
dom
--FILE--
<?php

$dom = new DOMDocument;
$element = $dom->appendChild($dom->createElement('root'));
try {
$element->prepend('x', new DOMEntity);
} catch (DOMException $e) {
echo $e->getMessage(), "\n";
}
echo $dom->saveXML();
$dom->strictErrorChecking = false; // Should not have influence
try {
$element->prepend('x', new DOMEntity);
} catch (DOMException $e) {
echo $e->getMessage(), "\n";
}
echo $dom->saveXML();

?>
--EXPECT--
Invalid State Error
<?xml version="1.0"?>
<root/>
Invalid State Error
<?xml version="1.0"?>
<root/>
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