php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #79792 HT iterators not removed if empty array is destroyed
Submitted: 2020-07-04 18:41 UTC Modified: 2020-07-07 09:55 UTC
From: changochen1 at gmail dot com Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 8.0Git-2020-07-04 (Git) OS:
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: changochen1 at gmail dot com
New email:
PHP Version: OS:

 

 [2020-07-04 18:41 UTC] changochen1 at gmail dot com 
Description:
------------
LOG:
---
php: /home/yongheng/php_clean/Zend/zend_hash.c:563: void zend_hash_iterator_del(uint32_t): Assertion `(iter->ht)->u.v.nIteratorsCount != 0' failed.
---

Test script:
---------------
<?
define ( "THE_CONST" , 3 ) ;
function b ( $a = array ( THE_CONST ) ) {
    foreach ( $a as & $c ) {
        array_shift ( $a ) ;
        list ( $a  ) = $b ;
        d   ;
    }
}
b () ;

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2020-07-07 09:39 UTC] nikic@php.net
-Status: Open +Status: Verified
 [2020-07-07 09:39 UTC] nikic@php.net 
Reduced:

<?php 
$a = [42];
foreach ($a as &$c) {
    array_shift($a);
    $a = null;
}

Valgrind:

==931749== Invalid read of size 1
==931749==    at 0x9D84AC: zend_hash_iterator_del (zend_hash.c:562)
==931749==    by 0xA16268: ZEND_FE_FREE_SPEC_TMPVAR_HANDLER (zend_vm_execute.h:12928)
==931749==    by 0xA66AEF: execute_ex (zend_vm_execute.h:53339)
==931749==    by 0xA6A0DE: zend_execute (zend_vm_execute.h:56094)
==931749==    by 0x9C442A: zend_execute_scripts (zend.c:1667)
==931749==    by 0x92BF71: php_execute_script (main.c:2537)
==931749==    by 0xAA9077: do_cli (php_cli.c:955)
==931749==    by 0xAAA16F: main (php_cli.c:1353)
==931749==  Address 0x8ebc9aa is 10 bytes inside a block of size 56 free'd
==931749==    at 0x483CA3F: free (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
==931749==    by 0x98A6FA: _efree_custom (zend_alloc.c:2426)
==931749==    by 0x98A851: _efree (zend_alloc.c:2546)
==931749==    by 0x9DBCF8: zend_array_destroy (zend_hash.c:1662)
==931749==    by 0x9BFF72: rc_dtor_func (zend_variables.c:57)
==931749==    by 0x9EE297: zend_assign_to_variable (zend_execute.h:141)
==931749==    by 0xA50B89: ZEND_ASSIGN_SPEC_CV_CONST_RETVAL_UNUSED_HANDLER (zend_vm_execute.h:39272)
==931749==    by 0xA69304: execute_ex (zend_vm_execute.h:55374)
==931749==    by 0xA6A0DE: zend_execute (zend_vm_execute.h:56094)
==931749==    by 0x9C442A: zend_execute_scripts (zend.c:1667)
==931749==    by 0x92BF71: php_execute_script (main.c:2537)
==931749==    by 0xAA9077: do_cli (php_cli.c:955)
==931749==  Block was alloc'd at
==931749==    at 0x483B7F3: malloc (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
==931749==    by 0x98B83F: __zend_malloc (zend_alloc.c:2992)
==931749==    by 0x98A689: _malloc_custom (zend_alloc.c:2417)
==931749==    by 0x98A7D3: _emalloc (zend_alloc.c:2536)
==931749==    by 0x9DD2F0: zend_array_dup (zend_hash.c:2072)
==931749==    by 0xA492FA: ZEND_FE_RESET_RW_SPEC_CV_HANDLER (zend_vm_execute.h:36337)
==931749==    by 0xA68E54: execute_ex (zend_vm_execute.h:55134)
==931749==    by 0xA6A0DE: zend_execute (zend_vm_execute.h:56094)
==931749==    by 0x9C442A: zend_execute_scripts (zend.c:1667)
==931749==    by 0x92BF71: php_execute_script (main.c:2537)
==931749==    by 0xAA9077: do_cli (php_cli.c:955)
==931749==    by 0xAAA16F: main (php_cli.c:1353)
 [2020-07-07 09:55 UTC] nikic@php.net
-Summary: Assertion `(iter->ht)->u.v.nIteratorsCount != 0' failed. +Summary: HT iterators not removed if empty array is destroyed
 [2020-07-07 10:00 UTC] nikic@php.net 
Automatic comment on behalf of nikita.ppv@gmail.com
Revision: http://git.php.net/?p=php-src.git;a=commit;h=64931fd3c4c7c3d217f2f19c997a8f89779727c5
Log: Fixed bug #79792
 [2020-07-07 10:00 UTC] nikic@php.net
-Status: Verified +Status: Closed
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved. 		Last updated: Thu Nov 21 11:01:29 2024 UTC