Hi List,

We've been seeing the following error on a CentOS 5.2 x86_64 / 2.6.18-92.1.6.el5 install (from /var/log/httpd/error):

*** glibc detected *** /usr/sbin/httpd: double free or corruption (! prev): 0x00002ad8ebed2d80 *** [Thu Jul 10 19:12:19 2008] [notice] child pid 5261 exit signal Segmentation fault (11) [Thu Jul 10 19:12:48 2008] [notice] child pid 12180 exit signal Segmentation fault (11) ...

The following packages are installed: glibc-2.5-24 httpd-2.2.3-11.el5_1.centos.3 mysql-server-5.0.45-7.el5 mysql-5.0.45-7.el5 php-gd-5.1.6-20.el5 php-mysql-5.1.6-20.el5 php-common-5.1.6-20.el5 php-pdo-5.1.6-20.el5 php-cli-5.1.6-20.el5 php-5.1.6-20.el5 php-imap-5.1.6-20.el5

If we remove the php-pdo / php-mysql packages, then the crashes stop. But, we need those packages, so that's not a solution.

Any ideas as to what might be causing this?

We've tried the obvious things; the only thing that's not "vanilla" here are a few settings in /etc/php.ini (having to do with max execution time and max memory). The php code that's being run does have its share of php warn/notices:

PHP Notice: Undefined index: d in [snip] on line 1699 PHP Notice: Undefined index: verbose in [snip] on line 1819 PHP Warning: Invalid argument supplied for foreach() in [snip] on line 1695

So I would not be surprised if it is tickling something out of the ordinary, but it should still not be causing a segfault!

Any thoughts as to what's going on here, and how to fix it? I'm tempted to install php 5.2.6 from utterramblings repo, to see if that works around this.

Thanks!