From: Operating system: Gentoo VServer, kernel 2.6.35 PHP version: 5.4.1 Package: Reproducible crash Bug Type: Bug Bug description:SEGFAULT in gc_zval_possible_root
Description: ------------ PHP script keeps SEGFAULTing at the end of run. The script's output and HTTP headers sent by application are sent to browser along with Apache's 500 error document after the PHP's output. The same behaviour when run as FastCGI (Apache 2.2.22, mod_fastcgi 2.4.7_pre0910052141, PHP-FPM) or CLI (except for the Apache's error document obviously). The below php info and GDB backtrace is taken from CLI run. I tried to recompile whole server but the problem still persists. I also tried different PHP version's, it is the same for PHP 5.3.10, 5.4.0 and 5.4.1. gc_disable() run in the begining solves the issue partialy - on some sites under some conditions. I unfortunately did not have the chance to identify the conditions, it seems to be connected with loading a lot of records (100+) from database. The below output is without gc_disable(). I am unable to provide test case as the application is big and uses __destructors, __autoload and __toString methods a lot along with OutputBuffering (but the script SEGFAULTs with output buffer turned off too). My PHP info: System => Linux hosting.ignition.cz 2.6.35-vs2.3.0.36.32-gentoo #4 SMP Sat May 28 09:55:08 CEST 2011 x86_64 Build Date => Apr 26 2012 21:35:55 Configure Command => './configure' '--prefix=/usr' '--build=x86_64-pc-linux-gnu' '--host=x86_64-pc-linux-gnu' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--datadir=/usr/share' '--sysconfdir=/etc' '--loc alstatedir=/var/lib' '--prefix=/usr/lib64/php5.4' '--mandir=/usr/lib64/php5.4/man' '--infodir=/usr/lib64/php5.4/info' '--libdir=/usr/lib64/php5.4/lib' '--with-libdir=lib64' '--without-pear' '--disable-maintainer-zts ' '--enable-bcmath' '--with-bz2' '--enable-calendar' '--enable-ctype' '--with-curl' '--without-curlwrappers' '--enable-dom' '--with-enchant=/usr' '--enable-exif' '--enable-fileinfo' '--enable-filter' '--enable-ftp' '--with-gettext' '--with-gmp' '--enable-hash' '--with-mhash' '--with-iconv' '--enable-intl' '--disable-ipv6' '--enable-json' '--without-kerberos' '--enable-libxml' '--enable-mbstring' '--with-mcrypt' '--without-mssq l' '--with-onig=/usr' '--with-openssl' '--with-openssl-dir=/usr' '--enable-pcntl' '--enable-phar' '--enable-pdo' '--with-pgsql' '--enable-posix' '--with-pspell' '--without-recode' '--enable-simplexml' '--disable-shm op' '--with-snmp' '--enable-soap' '--enable-sockets' '--with-sqlite3=/usr' '--without-sybase-ct' '--disable-sysvmsg' '--disable-sysvsem' '--disable-sysvshm' '--with-tidy' '--enable-tokenizer' '--enable-wddx' '--enab le-xml' '--enable-xmlreader' '--enable-xmlwriter' '--with-xmlrpc' '--with-xsl' '--enable-zip' '--with-zlib' '--disable-debug' '--enable-dba' '--without-cdb' '--with-db4' '--disable-flatfile' '--with-gdbm' '--disable -inifile' '--without-qdbm' '--with-freetype-dir=/usr' '--with-t1lib=/usr' '--disable-gd-jis-conv' '--with-jpeg-dir=/usr' '--with-png-dir=/usr' '--with-xpm-dir=/usr' '--with-gd' '--with-imap' '--with-imap-ssl' '--wit h-interbase=/usr' '--with-mysql=mysqlnd' '--with-mysql-sock=/var/run/mysqld/mysqld.sock' '--with-mysqli=mysqlnd' '--without-pdo-dblib' '--with-pdo-mysql=mysqlnd' '--with-pdo-pgsql' '--with-pdo-sqlite=/usr' '--withou t-pdo-odbc' '--with-readline' '--without-libedit' '--without-mm' '--with-pcre-regex=/usr' '--with-pcre-dir=/usr' '--with-config-file-path=/etc/php/cli-php5.4' '--with-config-file-scan-dir=/etc/php/cli-php5.4/ext-act ive' '--disable-embed' '--enable-cli' '--disable-cgi' '--disable-fpm' '--without-apxs2' Server API => Command Line Interface Virtual Directory Support => disabled Configuration File (php.ini) Path => /etc/php/cli-php5.4 Loaded Configuration File => /etc/php/cli-php5.4/php.ini Scan this dir for additional .ini files => /etc/php/cli-php5.4/ext-active Additional .ini files parsed => /etc/php/cli-php5.4/ext-active/cairo.ini, /etc/php/cli-php5.4/ext-active/haru.ini, /etc/php/cli-php5.4/ext-active/imagick.ini, /etc/php/cli-php5.4/ext-active/uploadprogress.ini PHP API => 20100412 PHP Extension => 20100525 Zend Extension => 220100525 Zend Extension Build => API220100525,NTS PHP Extension Build => API20100525,NTS Debug Build => no Thread Safety => disabled Zend Signal Handling => disabled Zend Memory Manager => enabled Zend Multibyte Support => provided by mbstring IPv6 Support => disabled DTrace Support => disabled If needed, please instruct me how to get more information about the SEGFAULT, I will gladly provide more information. Expected result: ---------------- Clean script exit. Actual result: -------------- SEGFAULT with following GDB backtrace: Program terminated with signal 11, Segmentation fault. #0 0x00007f7a5086e8e1 in gc_zval_possible_root () #1 0x00007f7a50870aa2 in zend_object_std_dtor () #2 0x00007f7a50870afd in zend_objects_free_object_storage () #3 0x00007f7a50876f43 in zend_objects_store_free_object_storage () #4 0x00007f7a508398f3 in shutdown_executor () #5 0x00007f7a5084a6b5 in zend_deactivate () #6 0x00007f7a507e1e4a in php_request_shutdown () #7 0x00007f7a5090757c in ?? () #8 0x00007f7a50908b78 in main () -- Edit bug report at https://bugs.php.net/bug.php?id=61866&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=61866&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=61866&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=61866&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=61866&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=61866&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=61866&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=61866&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=61866&r=needscript Try newer version: https://bugs.php.net/fix.php?id=61866&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=61866&r=support Expected behavior: https://bugs.php.net/fix.php?id=61866&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=61866&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=61866&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=61866&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=61866&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=61866&r=dst IIS Stability: https://bugs.php.net/fix.php?id=61866&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=61866&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=61866&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=61866&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=61866&r=mysqlcfg
