#31128 [Opn->Bgs]: apache2 restart causing divide by zero when php is introduce newly

ID: 31128 Updated by: edink@php.net Reported By: kameshj at fastmail dot fm -Status: Open +Status: Bogus Bug Type: Apache2 related Operating System: Any Operating System PHP Version: 5.0.3 New Comment: Adding PHP module like that is not supported. You have to do a full stop/start when adding/removing PHP module. Previous Comments: ------------------------------------------------------------------------ [2004-12-16 17:17:35] kameshj at fastmail dot fm Description: ------------ I found apache2 crashes with Divide by Zero error in the following scenario. This is with the PHP built with ZTS mode. Hope some other defect will occur for Non-ZTS. With regards Kamesh Jayachandran -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php Reproduce code: --------------- 1)Disable php module and start apache2. 2)enable php in the httpd.conf 3)httpd restart(Not stop and start) 4)make a request to any php page apache crashes with divide by zero. I drilled down on this issue. My investigation is, Apache on startup calls php_apache_server_startup twice one to set a user data for a userdata_key "apache2filter_post_config" and another to call tsrm_startup and all. While restart it simply calls this function once which misses out call to tsrm_startup and hence tsrm_tls_table_size is just zero inside TSRM which causes divide by zero error in THREAD_HASH_OF macro. This can be attributed to the loading/unloading/reloading of apache modules to do some syntax check on its configuration(Correct me if I am wrong This info I got from Rasmus in one of the mail thread.) While startup post_config hook is called twice, But once when restart is called. Expected result: ---------------- Apache2 should not crash Actual result: -------------- Apache2 crashes with Divide by Zero error. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=31128&edit=1