Bug #67363 [Fbk->Opn]: Unserialize corrupts data

Edit report at https://bugs.php.net/bug.php?id=67363&edit=1 ID: 67363 User updated by: mg at artigo dot pl Reported by: mg at artigo dot pl Summary: Unserialize corrupts data -Status: Feedback +Status: Open Type: Bug Package: Variables related Operating System: Irrelavant PHP Version: Irrelevant Block user comment: N Private report: N New Comment: Dear Nikita, I wish you a Happy New Year with lots of happiness and joy. It has been so long since the issue was reported, that we managed to implement some workarounds in the meantime and we do not encounter it anymore. That said, if I encounter it again, I will open another issue, ok? Thanks, Marcin Previous Comments: ------------------------------------------------------------------------ [2017-01-01 12:44:29] nikic@php.net Is someone still encountering this problem in PHP >= 5.6? If so, could you please specify whether you use opcache? If you do, can you check whether you get a reproducible crash if you set opcache.protect_memory=1? ------------------------------------------------------------------------ [2014-06-27 11:25:35] mg at artigo dot pl 3 more: "ticketshop-kilometer-bank" => "ticketshop-kilomfter-(NUL)ank" "ticketshop-promo-spar-holiday" => "ticketshop-promo.spar(NUL)holiday" "ticketshop-promo-weekend" => "ticketshop-promo.week(NUL)nd" ------------------------------------------------------------------------ [2014-06-27 11:18:51] mg at artigo dot pl We just had the same issue on a different server (FCGI 5.4.27) String currupted by unserialize: "ticketshop-promo-summer-ticket" => "ticketshop-promo.summ(NUL)r-ticket" ------------------------------------------------------------------------ [2014-06-05 15:33:46] mg at artigo dot pl I just experienced the same issue on a totally different setup apache + mod_php 5.5.11 + zend opcache String "Opinion Leader des Tages" became "Opinion Leader dfs Taes" after unserialize. ------------------------------------------------------------------------ [2014-06-02 07:57:12] mg at artigo dot pl Regarding the original problem with unserialize corruption issue: In this single case "Make-up & Styling" became "Make-up ' Sty ing" & = hex 26 became ' = hex 27 l = hex 6c became (nul) = hex 00 The changes in characters are always different and seem random. It is worth mentioning that the issue appears out of nowhere and can be fixed by restarting the server. It seems memory related. For this reason it is not possible to provide a bug testing snippet, because it simply won't create the same issue on another machine, although it may get it's own unique corruption on a random day. The issue presents itself always on Apache server (various versions 2-2.4), mod_php or FCGI. ------------------------------------------------------------------------ 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=67363 -- Edit this bug report at https://bugs.php.net/bug.php?id=67363&edit=1