[php-src] Issue #8159: Apache / PHP segfaults (PHP 8.0 and 8.1, but also 7.4)

Issue: https://github.com/php/php-src/issues/8159 Comment Author: unix-world @devnexen I don't know why this ticket was closed without an answer. More, this looks like a serious security issue to me. In my opinion the bug I reported here is because of the new changes in the opcache, in PHP 7.4 / 8.0 and 8.1. PHP 7.3 is working correctly, without this bug. Somewhere in time it was fixed, but now appears that have come back. https://bugzilla.redhat.com/show_bug.cgi?id=1314888 I am not a C expert, but this clear looks to me like a "use-after-free error" ... And probabily is comming from this changed area: In 7.3.33 the accel_activate method is called in ext/opcache/ZendAccelerator.c, line # 3156 https://github.com/php/php-src/blob/php-7.3.33/ext/opcache/ZendAccelerator.c#L3156 In 8.0.16 the accel_activate method is called in a completely different place: ext/opcache/zend_accelerator_module.c, line # 507 https://github.com/php/php-src/blob/php-8.0.16/ext/opcache/zend_accelerator_module.c#L507 Please not that I included the PHP 7.4 in this discussion just to exclude the possibility this bug have nothing to do with the opcache JIT (introduced only since 8.0) ! Thus, PHP 7.4 have no opcache JIT and still crashing because it uses a similar way of calling accel_activate in ext/opcache/zend_accelerator_module.c just like PHP 8.0 and 8.1.