Merge branch 'PHP-8.3'

* PHP-8.3:
  Fix GH-15654: Signed integer overflow in ext/dom/nodelist.c

NEWS

@@ -14,6 +14,8 @@ PHP                                                                        NEWS
 - DOM:
   . Fixed bug GH-13988 (Storing DOMElement consume 4 times more memory in
     PHP 8.1 than in PHP 8.0). (nielsdos)
+  . Fixed bug GH-15654 (Signed integer overflow in ext/dom/nodelist.c).
+    (nielsdos)
 
 - GD:
   . Added gdImageClone to bundled libgd. (David Carlier)

ext/dom/dom_iterators.c

@@ -152,7 +152,7 @@ static xmlNodePtr dom_fetch_first_iteration_item(dom_nnodemap_object *objmap)
 			return dom_nodelist_iter_start_first_child(basep);
 		}
 	} else {
-		int curindex = 0;
+		zend_long curindex = 0;
 		xmlNodePtr nodep = php_dom_first_child_of_container_node(basep);
 		return dom_get_elements_by_tag_name_ns_raw(
 			basep, nodep, objmap->ns, objmap->local, objmap->local_lower, &curindex, 0);
@@ -209,7 +209,7 @@ static void php_dom_iterator_move_forward(zend_object_iterator *iter) /* {{{ */
 					/* We have a strong reference to the base node via baseobj_zv, this cannot become NULL */
 					ZEND_ASSERT(basenode != NULL);
 
-					int previndex;
+					zend_long previndex;
 					if (php_dom_is_cache_tag_stale_from_node(&iterator->cache_tag, basenode)) {
 						php_dom_mark_cache_tag_up_to_date_from_node(&iterator->cache_tag, basenode);
 						previndex = 0;

ext/dom/html_collection.c

@@ -46,8 +46,8 @@ static dom_named_item dom_html_collection_named_item(zend_string *key, zend_obje
 	/* 2. Return the first element in the collection for which at least one of the following is true: */
 	xmlNodePtr basep = dom_object_get_node(objmap->baseobj);
 	if (basep != NULL) {
-		int cur = 0;
+		zend_long cur = 0;
-		int next = cur; /* not +1, otherwise we skip the first candidate */
+		zend_long next = cur; /* not +1, otherwise we skip the first candidate */
 		xmlNodePtr candidate = basep->children;
 		while (candidate != NULL) {
 			candidate = dom_get_elements_by_tag_name_ns_raw(basep, candidate, objmap->ns, objmap->local, objmap->local_lower, &cur, next);

ext/dom/nodelist.c

@@ -92,7 +92,7 @@ zend_long php_dom_get_nodelist_length(dom_object *obj)
 		reset_objmap_cache(objmap);
 	}
 
-	int count = 0;
+	zend_long count = 0;
 	if (objmap->nodetype == XML_ATTRIBUTE_NODE || objmap->nodetype == XML_ELEMENT_NODE) {
 		xmlNodePtr curnode = dom_nodelist_iter_start_first_child(nodep);
 		if (curnode) {
@@ -106,7 +106,7 @@ zend_long php_dom_get_nodelist_length(dom_object *obj)
 		xmlNodePtr basep = nodep;
 		nodep = php_dom_first_child_of_container_node(basep);
 		dom_get_elements_by_tag_name_ns_raw(
-			basep, nodep, objmap->ns, objmap->local, objmap->local_lower, &count, INT_MAX - 1 /* because of <= */);
+			basep, nodep, objmap->ns, objmap->local, objmap->local_lower, &count, ZEND_LONG_MAX - 1 /* because of <= */);
 	}
 
 	objmap->cached_length = count;
@@ -159,7 +159,7 @@ void php_dom_nodelist_get_item_into_zval(dom_nnodemap_object *objmap, zend_long
 						 * TODO: in the future we could extend the logic of the node list such that backwards searches
 						 *       are also possible. */
 						bool restart = true;
-						int relative_index = index;
+						zend_long relative_index = index;
 						if (index >= objmap->cached_obj_index && objmap->cached_obj && !php_dom_is_cache_tag_stale_from_node(&objmap->cache_tag, nodep)) {
 							xmlNodePtr cached_obj_xml_node = dom_object_get_node(objmap->cached_obj);
 
@@ -177,7 +177,7 @@ void php_dom_nodelist_get_item_into_zval(dom_nnodemap_object *objmap, zend_long
 								nodep = cached_obj_xml_node;
 							}
 						}
-						int count = 0;
+						zend_long count = 0;
 						if (objmap->nodetype == XML_ATTRIBUTE_NODE || objmap->nodetype == XML_ELEMENT_NODE) {
 							if (restart) {
 								nodep = dom_nodelist_iter_start_first_child(nodep);

ext/dom/php_dom.c

@@ -1855,7 +1855,7 @@ static bool dom_match_qualified_name_for_tag_name_equality(const xmlChar *local,
 	return dom_match_qualified_name_according_to_spec(local_to_use, nodep);
 }
 
-xmlNode *dom_get_elements_by_tag_name_ns_raw(xmlNodePtr basep, xmlNodePtr nodep, xmlChar *ns, xmlChar *local, xmlChar *local_lower, int *cur, int index) /* {{{ */
+xmlNode *dom_get_elements_by_tag_name_ns_raw(xmlNodePtr basep, xmlNodePtr nodep, xmlChar *ns, xmlChar *local, xmlChar *local_lower, zend_long *cur, zend_long index) /* {{{ */
 {
 	/* Can happen with detached document */
 	if (UNEXPECTED(nodep == NULL)) {

ext/dom/php_dom.h

@@ -87,7 +87,7 @@ typedef struct dom_nnodemap_object {
 	xmlChar *ns;
 	php_libxml_cache_tag cache_tag;
 	dom_object *cached_obj;
-	int cached_obj_index;
+	zend_long cached_obj_index;
 	bool free_local : 1;
 	bool free_ns : 1;
 } dom_nnodemap_object;
@@ -143,7 +143,7 @@ void dom_reconcile_ns_list(xmlDocPtr doc, xmlNodePtr nodep, xmlNodePtr last);
 xmlNsPtr dom_get_nsdecl(xmlNode *node, xmlChar *localName);
 void php_dom_normalize_legacy(xmlNodePtr nodep);
 void php_dom_normalize_modern(xmlNodePtr nodep);
-xmlNode *dom_get_elements_by_tag_name_ns_raw(xmlNodePtr basep, xmlNodePtr nodep, xmlChar *ns, xmlChar *local, xmlChar *local_lower, int *cur, int index);
+xmlNode *dom_get_elements_by_tag_name_ns_raw(xmlNodePtr basep, xmlNodePtr nodep, xmlChar *ns, xmlChar *local, xmlChar *local_lower, zend_long *cur, zend_long index);
 void php_dom_create_implementation(zval *retval, bool modern);
 int dom_hierarchy(xmlNodePtr parent, xmlNodePtr child);
 bool dom_has_feature(zend_string *feature, zend_string *version);

ext/dom/tests/gh15654.phpt

@@ -0,0 +1,32 @@
+--TEST--
+GH-15654 (Signed integer overflow in ext/dom/nodelist.c)
+--EXTENSIONS--
+dom
+--SKIPIF--
+<?php
+if (PHP_INT_SIZE != 8) die('skip 64-bit only');
+?>
+--FILE--
+<?php
+define("MAX_64Bit", 9223372036854775807);
+define("MAX_32Bit", 2147483647);
+define("MIN_64Bit", -9223372036854775807 - 1);
+define("MIN_32Bit", -2147483647 - 1);
+$longVals = array(
+    0, MAX_64Bit, MIN_64Bit, MAX_32Bit, MIN_32Bit, MAX_64Bit - MAX_32Bit, MIN_64Bit - MIN_32Bit,
+);
+$dom = new DOMDocument;
+$dom->loadXML('<root><a/><b/><c/></root>');
+$children = $dom->documentElement->childNodes;
+foreach ($longVals as $value) {
+    var_dump($children[$value]?->nodeName);
+}
+?>
+--EXPECT--
+string(1) "a"
+NULL
+NULL
+NULL
+NULL
+NULL
+NULL