#44554 [NoF->Opn]: *** glibc detected *** double free or corruption

ID: 44554 User updated by: vlada at mysh dot cz Reported By: vlada at mysh dot cz -Status: No Feedback +Status: Open -Bug Type: Apache2 related +Bug Type: Session related -Operating System: Debian etch +Operating System: Debian etch or lenny -PHP Version: 5.2.5 +PHP Version: 5.2.12 Assigned To: fb-req-jani New Comment: After a year, I came to same problem on newer server.. There were a lot of warnings in apache's error_log *** glibc detected *** /usr/local/apache/bin/httpd: double free or corruption (out): 0x08b11590 *** *** glibc detected *** /usr/local/apache/bin/httpd: double free or corruption (out): 0x08b12a78 *** *** glibc detected *** /usr/local/apache/bin/httpd: double free or corruption (out): 0x08b1aa30 *** *** glibc detected *** /usr/local/apache/bin/httpd: double free or corruption (out): 0x0a399120 *** *** glibc detected *** /usr/local/apache/bin/httpd: double free or corruption (!prev): 0x0a3eab68 *** etc.. Mainly while using DokuWiki or phpMyAdmin After I changed session handler from sqlite to files, problem dissapeared. Now it's a week with files session handler and no new entry in log saying something about glibc error. So I am sure, it's caused by sqlite session handler. Previous Comments: ------------------------------------------------------------------------ [2008-04-11 01:00:01] php-bugs at lists dot php dot net No feedback was provided for this bug for over a week, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to "Open". ------------------------------------------------------------------------ [2008-04-03 21:06:00] jani@php.net If you can reliably prove it's sqlite session handler that causes it, please reclassify this report as "Session related" and update the summary. ------------------------------------------------------------------------ [2008-04-03 18:40:26] vlada at mysh dot cz So.. I have checked configuration of PHP. Default php.ini-dist worked, so I make diff between mine and default. Main difference was in method of saving sessions. We were using sqlite. When I changed it to default, files type, everything is now OK. I leave this, files session configuration run for a longer period, but I think, problem was i sqlite. ------------------------------------------------------------------------ [2008-04-02 10:20:58] jani@php.net If you have 2 servers and on one you don't have such problems and on the other one you have, just check what the differences are in those systems. php.ini, configure lines, compiler versions, etc. ------------------------------------------------------------------------ [2008-04-02 10:13:43] vlada at mysh dot cz So.. I've sucessfully downgraded to same glibc version as on other server is. Than recompiled apache and php again with this older libc, but this errors appears in log again. Sometimes it causes exit signal Segmentation fault(11) and sometimes "only" exit signal Aborted (6). *** glibc detected *** double free or corruption (out): 0x08408b78 *** *** glibc detected *** double free or corruption (!prev): 0x0840d220 *** I am sorry for bothering but I going to be quite desperate about this problem, because I still don't know why it happens. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/44554 -- Edit this bug report at http://bugs.php.net/?id=44554&edit=1