Bug #67687 [Fbk->NoF]: Crash or zend_mm_heap_corrupted error in opcache with OwnCloud 7 update

Edit report at https://bugs.php.net/bug.php?id=67687&edit=1 ID: 67687 Updated by: php-bugs@lists.php.net Reported by: adamw at happyassassin dot net Summary: Crash or zend_mm_heap_corrupted error in opcache with OwnCloud 7 update -Status: Feedback +Status: No Feedback Type: Bug Package: opcache Operating System: Fedora 20 PHP Version: 5.5.15 Assigned To: cmb Private report: N New Comment: No feedback was provided. The bug is being suspended because we assume that you are no longer experiencing the problem. If this is not the case and you are able to provide the information that was requested earlier, please do so and change the status of the bug back to "Re-Opened". Thank you. Previous Comments: ------------------------------------------------------------------------ [2020-04-07 10:22:58] cmb@php.net Can you still reproduce this crash with any of the actively supported PHP versions[1]? <https://www.php.net/supported-versions.php> ------------------------------------------------------------------------ [2015-03-16 10:26:02] software-php at interfasys dot ch Still a problem on PHP 5.5.22 ------------------------------------------------------------------------ [2014-07-27 13:25:46] patricknn at gmail dot com I have the same issue, the crash is random and happen in some pages with no reason PHP 5.5.11 ------------------------------------------------------------------------ [2014-07-26 06:44:32] adamw at happyassassin dot net Remi Collet seems to have spotted the code in OwnCloud that triggers the problem: it's the function clearOpcodeCache() in lib/private/util.php , https://github.com/owncloud/core/blob/v7.0.0/lib/private/util.php#L1351 . If I comment out the // Opcache (PHP >= 5.5) lines there, the crash stops happening. Somehow, OC manually resetting the opcache at that particular point is causing it to crash. That function is called only by lib/private/config.php , when it's changing config file values. So I believe this is triggered when lib/base.php 's checkUpgrade() function does this, on line 290: $oldTheme = OC_Config::getValue('theme'); OC_Config::setValue('theme', ''); that calls setValue() in config.php , and setValue() calls writeData(), and writeData() calls clearOpcodeCache() , and boom. ------------------------------------------------------------------------ [2014-07-26 01:11:29] adamw at happyassassin dot net Sorry, I gave the wrong link to the affected OwnCloud code. That's the code that actually *runs* the database update. I have actually seen the crash occur in the middle of a database upgrade (which is obviously bad), but the consistent reproducer I have is when just looking at the page which notifies you an upgrade is needed - it reads "ownCloud will be updated to version 7.0.0. Please make sure that the database, the config folder and the data folder have been backed up before proceeding.", and has a "Start update" button. That code is in https://github.com/owncloud/core/blob/v7.0.0/lib/base.php , particularly see the checkUpgrade() function on line 286. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=67687 -- Edit this bug report at https://bugs.php.net/bug.php?id=67687&edit=1