Bug #62886 [NEW]: PHP-FPM may segfault/hang on startup

From: pierre at archlinux dot de Operating system: Arch Linux PHP version: 5.4.6 Package: FPM related Bug Type: Bug Bug description:PHP-FPM may segfault/hang on startup Description: ------------ Since PHP 5.4.5 starting php-fpm will either result in a segmentation fault or it will hang under certain conditions. It is a little hard to reproduce but it seems it is related to using modules. There more modules get loaded via php.ini the more likely this bug will get triggered (> 30%); with no modules loaded I was not able to trigger it. I started from 5.4.6 and reverted patches applied to sapi/fpm. Once I reverted commit c2f33fb1293cbcdc94daefb8583ca13e98b5c826, php would no longer crash or hang. See http://git.php.net/?p=php-src.git;a=commit;h=c2f33fb1293cbcdc94daefb8583ca13e98b5c826 Test script: --------------- Configure php with a bunch of modules and run something like this: for i in {1..100};do sudo php-fpm;sleep 0.5;sudo killall php-fpm;sleep 0.5;done watch dmesg for segfaults like php-fpm[32571]: segfault at 7f4eabe93cf8 ip 00007f4eae9b1ed6 sp 00007fff87d69310 error 4 in ld-2.16.so[7f4eae9a3000+21000] gdb will tell you 0x00007fe0412c1ed6 in _dl_fini () from /lib/ld-linux-x86-64.so.2 Sometimes php-fpm will hang and has to be killed with kill -9. -- Edit bug report at https://bugs.php.net/bug.php?id=62886&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=62886&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=62886&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=62886&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=62886&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=62886&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=62886&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=62886&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=62886&r=needscript Try newer version: https://bugs.php.net/fix.php?id=62886&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=62886&r=support Expected behavior: https://bugs.php.net/fix.php?id=62886&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=62886&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=62886&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=62886&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=62886&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=62886&r=dst IIS Stability: https://bugs.php.net/fix.php?id=62886&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=62886&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=62886&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=62886&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=62886&r=mysqlcfg