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Fix GH-15192: Segmentation fault in dom extension (html5_serializer)

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When cloning a document, doc will not be equal to the actual new
document clone->doc. clone->doc will always point to the correct
document so use that instead when comparing document nodes.

Closes GH-15198.
This commit is contained in:
Niels Dossche 2024-08-01 20:43:32 +02:00
parent 85fa983fe6
commit 76ad89ccff
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3 changed files with 81 additions and 2 deletions
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5
NEWS
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@ -2,11 +2,14 @@ PHP NEWS
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
?? ??? ????, PHP 8.4.0beta1
- DOM:
. Fixed bug GH-15192 (Segmentation fault in dom extension
(html5_serializer)). (nielsdos)
- PHPDBG:
. array out of bounds, stack overflow handled for segfault handler on windows.
(David Carlier)
01 Aug 2024, PHP 8.4.0alpha4
- GMP:

5
ext/dom/php_dom.c
View file

@ -2579,7 +2579,10 @@ xmlNodePtr dom_clone_node(php_dom_libxml_ns_mapper *ns_mapper, xmlNodePtr node,
if (ns_mapper != NULL) {
xmlNodePtr clone = dom_clone_helper(ns_mapper, node, doc, recursive);
if (EXPECTED(clone != NULL) && doc != node->doc) {
/* Defensively set doc to NULL because we should not be using it after this point.
* When cloning a document the new document will be clone->doc, not doc. */
doc = NULL;
if (EXPECTED(clone != NULL) && clone->doc != node->doc) {
/* We only need to reconcile the namespace when the document changes because the namespaces have to be
* put into their respective namespace mapper. */
if (clone->type == XML_DOCUMENT_NODE || clone->type == XML_HTML_DOCUMENT_NODE || clone->type == XML_DOCUMENT_FRAG_NODE) {

73
ext/dom/tests/gh15192.phpt Normal file
View file

@ -0,0 +1,73 @@
--TEST--
GH-15192 (Segmentation fault in dom extension (html5_serializer))
--EXTENSIONS--
dom
--FILE--
<?php
$dom = @Dom\HTMLDocument::createFromString("<p>foo</p>");
$dom2 = clone $dom;
$element = $dom2->firstChild;
$dom = new DomDocument();
var_dump($element);
?>
--EXPECTF--
object(Dom\HTMLElement)#3 (29) {
["namespaceURI"]=>
string(28) "http://www.w3.org/1999/xhtml"
["prefix"]=>
NULL
["localName"]=>
string(4) "html"
["tagName"]=>
string(4) "HTML"
["id"]=>
string(0) ""
["className"]=>
string(0) ""
["classList"]=>
string(22) "(object value omitted)"
["attributes"]=>
string(22) "(object value omitted)"
["firstElementChild"]=>
string(22) "(object value omitted)"
["lastElementChild"]=>
string(22) "(object value omitted)"
["childElementCount"]=>
int(2)
["previousElementSibling"]=>
NULL
["nextElementSibling"]=>
NULL
["innerHTML"]=>
string(36) "<head></head><body><p>foo</p></body>"
["substitutedNodeValue"]=>
string(3) "foo"
["nodeType"]=>
int(1)
["nodeName"]=>
string(4) "HTML"
["baseURI"]=>
string(11) "about:blank"
["isConnected"]=>
bool(true)
["ownerDocument"]=>
string(22) "(object value omitted)"
["parentNode"]=>
string(22) "(object value omitted)"
["parentElement"]=>
NULL
["childNodes"]=>
string(22) "(object value omitted)"
["firstChild"]=>
string(22) "(object value omitted)"
["lastChild"]=>
string(22) "(object value omitted)"
["previousSibling"]=>
NULL
["nextSibling"]=>
NULL
["nodeValue"]=>
NULL
["textContent"]=>
string(3) "foo"
}