Bug #81380 [NEW]: Crash in Apache 2 module with opcache and observers after Apache reload

From: f dot sowade at r9e dot de Operating system: Linux PHP version: 8.0.9 Package: Apache2 related Bug Type: Bug Bug description:Crash in Apache 2 module with opcache and observers after Apache reload Description: ------------ I built PHP 8.0.9 as an Apache 2 module with the opcache and with the zend-test extensions: ./configure --disable-all --enable-zend-test --with-apxs2 --enable-zts --enable-opcache I then used the following php.ini which uses the zend-test extension to register an observer: zend_extension=opcache.so zend_test.observer.enabled=1 And I used a test script which just calls phpinfo(); The script works as expected after starting Apache. But when reloading Apache (systemctl reload apache2.service) I get a segmentation fault when accessing the script. This is the corresponding line from Apache's error.log: [Tue Aug 24 16:31:24.739107 2021] [core:notice] [pid 258215:tid 140253313567808] AH00051: child pid 258527 exit signal Segmentation fault (11), possible coredump in /etc/apache2 When restarting Apache (systemctl restart apache2.service) the script works again as expected. The problem also occurs with a custom PHP extension which uses the observer API. But since I was able to reproduce it with the zend-test extension, I thought that it was the easiest reproduction case. The problem does not occur if I don't load the opcache extension. Test script: --------------- <?php phpinfo(); -- Edit bug report at https://bugs.php.net/bug.php?id=81380&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=81380&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=81380&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=81380&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=81380&r=needscript Try newer version: https://bugs.php.net/fix.php?id=81380&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=81380&r=support Expected behavior: https://bugs.php.net/fix.php?id=81380&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=81380&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=81380&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=81380&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=81380&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=81380&r=dst IIS Stability: https://bugs.php.net/fix.php?id=81380&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=81380&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=81380&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=81380&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=81380&r=mysqlcfg