Bug #78956 [Opn]: ArrayObject becomes SEGV under certain conditions.

From: Date: Thu, 12 Dec 2019 17:25:48 +0000
Subject: Bug #78956 [Opn]: ArrayObject becomes SEGV under certain conditions.
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=78956&edit=1

 ID:                 78956
 Updated by:         cmb@php.net
 Reported by:        zeriyoshi at gmail dot com
 Summary:            ArrayObject becomes SEGV under certain conditions.
 Status:             Open
 Type:               Bug
 Package:            SPL related
 Operating System:   Linux
 PHP Version:        7.4.0
 Block user comment: N
 Private report:     N

 New Comment:

This looks like infinite recursion, which would be considered a
programmer error.


Previous Comments:
------------------------------------------------------------------------
[2019-12-12 16:30:25] zeriyoshi at gmail dot com

Description:
------------
Call property_exists function in offsetExists method, ArrayObject raise Segmentation fault.

Test script:
---------------
<?php

// OK (Handled with memory-size over.)
// property_exists(
//     new class ([], \ArrayObject::ARRAY_AS_PROPS) extends \ArrayObject {
//         public function offsetExists($index)
//         {
//             return $this->offsetExists($index);
//         }
//     }, 
//     'foo'
// );

// NG (SEGV)
property_exists(
    new class ([], \ArrayObject::ARRAY_AS_PROPS) extends \ArrayObject {
        public function offsetExists($index)
        {
            return property_exists($this, $index);
        }
    }, 
    'foo'
);

Expected result:
----------------
Fatal error: Allowed memory size of %d bytes exhausted (tried to allocate %d bytes) in %s on line %d

Actual result:
--------------
Segmentation fault


------------------------------------------------------------------------



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Edit this bug report at https://bugs.php.net/bug.php?id=78956&edit=1

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