Edit report at http://bugs.php.net/bug.php?id=44872&edit=1
ID: 44872
Comment by: capitalplus at yandex dot ru
Reported by: mattr at shoplet dot com
Summary: canary mismatch on efree() - heap overflow detected
Status: Closed
Type: Bug
Package: MySQLi related
Operating System: FreeBSD 6.2
PHP Version: 5.2.5
New Comment:
In my situation helped this solution:
Open php.ini and set parameter
mssql.datetimeconvert = Off
restart Apache. Error no longer appears.
Previous Comments:
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[2010-02-09 13:22:22] jimmy at pixelant dot se
Feb 9 13:51:36 xxxxxxxxxxxxxx suhosin[4498]: ALERT - canary mismatch on
efree() - heap overflow detected (attacker 'x.x.x.x', file
'class.t3lib_htmlmail.php', line 718)
Upgrade to php 5.2.12 resolved this issue.
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[2009-09-09 20:51:05] squarious at gmail dot com
I have the same error on 5.2.10 with suhosin patch.
Linux 2.6.31-10-generic #30-Ubuntu SMP Tue Sep 8 12:32:38 UTC 2009
x86_64 GNU/Linux
The tested site was working perfectly on Ubuntu 8.04 LTS with untouched
PHP 5.2.4 (with suhosin patch). The behaviour however is not standard
and it depends if the page is first time visite
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[2009-09-09 12:03:27] neofutur dot php at ww7 dot be
update/workaround . . . but scary . . .
someone on ##php tols me to restart apache, that when you get one of
those canary mismatch on efree() you get many until you restart apache.
I didnt pay attention at the beginning but finally tried it.
Its simply true, when you get those messages , restart apache and you
will see no more of them ( until the next apache overflow ? )
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[2009-09-09 10:21:49] neofutur dot php at ww7 dot be
I also tried the code suggested :
<?php
$demo_user[]=(object)array("first" => 1);
$demo_user[]=(object)array("second" => 2);
$demo_user[]=(object)array("third" => 3);
echo "<pre>"; var_dump($demo_user); echo "</pre>";
?>
This doesnt trigger any error message here
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[2009-09-09 10:07:50] neofutur dot php at ww7 dot be
your bugtool dont accept my comment after 40 attempts, so I just post
the pastebin url containing all my comments and logs :
http://dpaste.com/91360/
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