Bug #78280 [Opn]: _emalloc causes segfaults

Edit report at https://bugs.php.net/bug.php?id=78280&edit=1 ID: 78280 Updated by: nikic@php.net Reported by: grzegorz129 at gmail dot com Summary: _emalloc causes segfaults Status: Open Type: Bug Package: Reproducible crash Operating System: Linux PHP Version: 7.3.7 Block user comment: N Private report: N New Comment: Where did you get this 7.3.7 release? It was retagged due to a critical opcache bug, and I suspect your build does not include https://github.com/php/php-src/commit/21465ec0e1c1401751b35a21f45f1d57255d5be9. Previous Comments: ------------------------------------------------------------------------ [2019-07-12 15:43:31] grzegorz129 at gmail dot com Description: ------------ From the start I have to say I don't have a reproducer which I can share, since problem only demonstrates itself in a large codebase. However, I'm able to consistently reproduce the problem and I was able to gather couple core dumps. - https://pastebin.com/AD7Gtv4k - https://pastebin.com/iG9djuPi - https://pastebin.com/yMNHsgF2 - https://pastebin.com/PEyBwdry - https://pastebin.com/bBjPaAEy The only consistent element I see is the top frames on the chain: _emalloc -> zend_mm_alloc_heap -> zend_mm_alloc_small Test script: --------------- Not available Expected result: ---------------- - Actual result: -------------- Segfault ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=78280&edit=1