#31128 [NEW]: apache2 restart causing divide by zero when php is introduce newly

From: kameshj at fastmail dot fm Operating system: Any Operating System PHP version: 5.0.3 PHP Bug Type: Apache2 related Bug description: apache2 restart causing divide by zero when php is introduce newly 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 bug report at http://bugs.php.net/?id=31128&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=31128&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=31128&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=31128&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=31128&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=31128&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=31128&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=31128&r=needscript Try newer version: http://bugs.php.net/fix.php?id=31128&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=31128&r=support Expected behavior: http://bugs.php.net/fix.php?id=31128&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=31128&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=31128&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=31128&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=31128&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=31128&r=dst IIS Stability: http://bugs.php.net/fix.php?id=31128&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=31128&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=31128&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=31128&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=31128&r=mysqlcfg