Bug #74714 [NEW]: serialize() crashes with multiple threads / pthreads

From: benjamin dot roth at jaumo dot com Operating system: Linux PHP version: 7.1.5 Package: Reproducible crash Bug Type: Bug Bug description:serialize() crashes with multiple threads / pthreads Description: ------------ serialize() seems to be not thread safe. Scripts crash with SIGSEGV or SIGABORT on a regular basis if parallel threads do serialization with pthreads. Sometimes this happens at the end of the script on shutdown and sometimes in the middle of script execution. As it is a race condition there is no deterministic way to reproduce it but the attached script fails after some time in almost all cases. Test script: --------------- https://gist.github.com/brstgt/e04d08c237d84003103050dc7c371acd Serialized file required as "entities.txt" in test script: https://cl.ly/2v3Y1o2S351Q Run in loop until it segfaults or aborts. Normally between 1-30s while true; do php scripts/segv.php || break; done Expected result: ---------------- No SIGABORT or SIGSEGV Actual result: -------------- https://gist.github.com/brstgt/76e3e1135872e2ae1770ae4e59b66696 -- Edit bug report at https://bugs.php.net/bug.php?id=74714&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=74714&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=74714&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=74714&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=74714&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=74714&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=74714&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=74714&r=needscript Try newer version: https://bugs.php.net/fix.php?id=74714&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=74714&r=support Expected behavior: https://bugs.php.net/fix.php?id=74714&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=74714&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=74714&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=74714&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=74714&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=74714&r=dst IIS Stability: https://bugs.php.net/fix.php?id=74714&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=74714&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=74714&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=74714&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=74714&r=mysqlcfg