#34176 [Fbk->Opn]: apache2handler crashes parent process if child process dies

ID: 34176 User updated by: robert at rw-it dot net Reported By: robert at rw-it dot net -Status: Feedback +Status: Open Bug Type: Apache2 related Operating System: Win32 PHP Version: 4.4.0 New Comment: Seems to be fixed in php5-win32-latest (that is, built August 9th 2005). Will this be fixed in php4, too? Previous Comments: ------------------------------------------------------------------------ [2005-08-18 02:41:46] sniper@php.net Please try using this CVS snapshot: http://snaps.php.net/php5-latest.tar.gz For Windows: http://snaps.php.net/win32/php5-win32-latest.zip ------------------------------------------------------------------------ [2005-08-17 19:31:51] robert at rw-it dot net Description: ------------ Using mpm_winnt, if the child process dies, some of the php_apache_sapi_* functions seem to be called with SG(server_context) == NULL. This (sometimes??) results in crashing the parent process. I added a check for SG(server_context) == NULL to each function and the problem went away, but perhaps you could think of a better solution. Reproduce code: --------------- Write a script that crashes the child process. E.g. disable memory_limit and do for ($b = 'x'; ; $b .= $b); I also once inserted an exit(1) into apache's child.c with the same results, but doing it via PHP seems more realistic. Try to load the page a few times. Expected result: ---------------- Apache restarts the child process. Actual result: -------------- Sometimes it does, sometimes it crashes... ratio is about 2/3. When it crashes, the cause is an access to memory at address 0x0 or 0x4, in php4apache2.dll. Looking at the local variables, it appears that SG(server_context) is NULL. I was not able to reproduce a crash after I added checks for SG(server_context) == NULL to sapi_apache2.c. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=34176&edit=1