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nielsdosnielsdos
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Fix GH-18304: Changing the properties of a DateInterval through dynamic properties triggers a SegFault
For dynamic fetches the cache_slot will be NULL, so we have to check for that when resetting the cache. For zip and xmlreader this couldn't easily be tested because of a lack of writable properties. Closes GH-18307.
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14 files changed

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‎NEWS

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Original file line numberDiff line numberDiff line change
@@ -2,6 +2,10 @@ PHP NEWS
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|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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?? ??? ????, PHP 8.3.21
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5+
- Core:
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. Fixed bug GH-18304 (Changing the properties of a DateInterval through
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dynamic properties triggers a SegFault). (nielsdos)
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- GD:
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. Fixed imagecrop() overflow with rect argument with x/width y/heigh usage
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in gdImageCrop(). (David Carlier)

‎ext/date/php_date.c

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -4399,7 +4399,9 @@ static zval *date_interval_get_property_ptr_ptr(zend_object *object, zend_string
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zend_string_equals_literal(name, "days") ||
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zend_string_equals_literal(name, "invert") ) {
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/* Fallback to read_property. */
4402-
cache_slot[0] = cache_slot[1] = cache_slot[2] = NULL;
4402+
if (cache_slot) {
4403+
cache_slot[0] = cache_slot[1] = cache_slot[2] = NULL;
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}
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ret = NULL;
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} else {
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ret = zend_std_get_property_ptr_ptr(object, name, type, cache_slot);

‎ext/date/tests/gh18304.phpt

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@@ -0,0 +1,35 @@
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--TEST--
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GH-18304 (Changing the properties of a DateInterval through dynamic properties triggers a SegFault)
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--CREDITS--
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orose-assetgo
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--FILE--
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<?php
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$di = new \DateInterval('P0Y');
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$field = 'd';
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$i = 1;
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$di->$field += $i;
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var_dump($di);
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?>
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--EXPECT--
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object(DateInterval)#1 (10) {
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["y"]=>
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int(0)
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["m"]=>
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int(0)
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["d"]=>
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int(1)
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["h"]=>
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int(0)
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["i"]=>
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int(0)
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["s"]=>
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int(0)
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["f"]=>
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float(0)
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["invert"]=>
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int(0)
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["days"]=>
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bool(false)
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["from_string"]=>
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bool(false)
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}

‎ext/dom/php_dom.c

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -303,7 +303,9 @@ static zval *dom_get_property_ptr_ptr(zend_object *object, zend_string *name, in
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return zend_std_get_property_ptr_ptr(object, name, type, cache_slot);
304304
}
305305

306-
cache_slot[0] = cache_slot[1] = cache_slot[2] = NULL;
306+
if (cache_slot) {
307+
cache_slot[0] = cache_slot[1] = cache_slot[2] = NULL;
308+
}
307309
return NULL;
308310
}
309311

‎ext/dom/tests/gh18304.phpt

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@@ -0,0 +1,15 @@
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--TEST--
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GH-18304 (Changing the properties of a DateInterval through dynamic properties triggers a SegFault)
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--CREDITS--
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orose-assetgo
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--EXTENSIONS--
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dom
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--FILE--
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<?php
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$text = new \DOMText();
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$field = 'textContent';
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$text->$field .= 'hello';
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var_dump($text->$field);
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?>
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--EXPECT--
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string(5) "hello"

‎ext/pdo/pdo_stmt.c

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2493,9 +2493,10 @@ static zval *pdo_row_get_property_ptr_ptr(zend_object *object, zend_string *name
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ZEND_IGNORE_VALUE(object);
24942494
ZEND_IGNORE_VALUE(name);
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ZEND_IGNORE_VALUE(type);
2496-
ZEND_IGNORE_VALUE(cache_slot);
24972496

2498-
cache_slot[0] = cache_slot[1] = cache_slot[2] = NULL;
2497+
if (cache_slot) {
2498+
cache_slot[0] = cache_slot[1] = cache_slot[2] = NULL;
2499+
}
24992500
return NULL;
25002501
}
25012502

‎ext/simplexml/simplexml.c

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -635,7 +635,9 @@ static zval *sxe_property_get_adr(zend_object *object, zend_string *zname, int f
635635
SXE_ITER type;
636636
zval member;
637637

638-
cache_slot[0] = cache_slot[1] = cache_slot[2] = NULL;
638+
if (cache_slot) {
639+
cache_slot[0] = cache_slot[1] = cache_slot[2] = NULL;
640+
}
639641

640642
sxe = php_sxe_fetch_object(object);
641643
GET_NODE(sxe, node);

‎ext/simplexml/tests/gh18304.phpt

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@@ -0,0 +1,18 @@
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--TEST--
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GH-18304 (Changing the properties of a DateInterval through dynamic properties triggers a SegFault)
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--CREDITS--
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orose-assetgo
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--EXTENSIONS--
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simplexml
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--FILE--
8+
<?php
9+
$sxe = simplexml_load_string('<root><abc/></root>');
10+
$field = 'abc';
11+
$sxe->$field .= 'hello';
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var_dump($sxe->$field);
13+
?>
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--EXPECT--
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object(SimpleXMLElement)#3 (1) {
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[0]=>
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string(5) "hello"
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}

‎ext/snmp/snmp.c

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1861,7 +1861,9 @@ static zval *php_snmp_get_property_ptr_ptr(zend_object *object, zend_string *nam
18611861
return zend_std_get_property_ptr_ptr(object, name, type, cache_slot);
18621862
}
18631863

1864-
cache_slot[0] = cache_slot[1] = cache_slot[2] = NULL;
1864+
if (cache_slot) {
1865+
cache_slot[0] = cache_slot[1] = cache_slot[2] = NULL;
1866+
}
18651867
return NULL;
18661868
}
18671869

‎ext/snmp/tests/gh18304.phpt

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--TEST--
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GH-18304 (Changing the properties of a DateInterval through dynamic properties triggers a SegFault)
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--CREDITS--
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orose-assetgo
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--EXTENSIONS--
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snmp
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--FILE--
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<?php
9+
$snmp = new SNMP(1, '127.0.0.1', 'community');
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$field = 'max_oids';
11+
$snmp->$field++;
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var_dump($snmp->$field);
13+
?>
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--EXPECT--
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int(1)

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