Bug #70977 [Fbk]: Segmentation fault (core dumped) with opcache.huge_code_pages=1

Edit report at https://bugs.php.net/bug.php?id=70977&edit=1 ID: 70977 Updated by: laruence@php.net Reported by: reynierpm at gmail dot com Summary: Segmentation fault (core dumped) with opcache.huge_code_pages=1 Status: Feedback Type: Bug Package: Reproducible crash Operating System: CentOS 6.7 PHP Version: 7.0.0RC8 Assigned To: laruence Block user comment: N Private report: N New Comment: could you please try the patch here? : http://pastebin.com/Xg2eVzYq thanks Previous Comments: ------------------------------------------------------------------------ [2015-11-26 16:43:08] remi@php.net With patch proposed on 70973, same segfault. ------------------------------------------------------------------------ [2015-11-26 16:10:43] nikic@php.net @remi: That commit looks suspicious. If I get the code right, this means that we'll skip memcpy'ing the text segment back into the newly mapped memory if the madvise fails. This means that when control flow returns to the PHP text segment we're executing uninitialized memory. Btw, is it possible to map these as PROT_READ | PROT_WRITE only? I know it's only temporary, but it doesn't seem necessary to have this as w+x memory. ------------------------------------------------------------------------ [2015-11-26 16:01:29] remi@php.net @laruence: I'm giving first a try to http://git.php.net/?p=php-src.git;a=commitdiff;h=eb59dd7d8137c6567afcd579bcb3bd0298f5bbc4 which is not part of RC8 ------------------------------------------------------------------------ [2015-11-26 15:21:57] laruence@php.net from the description, it probably a duplictated to #70973 , could you please try the patch I commentted there? thanks ------------------------------------------------------------------------ [2015-11-26 14:42:06] reynierpm at gmail dot com Description: ------------ I tried to run "composer update" in a Symfony2 project and got the following error: "Segmentation fault (core dumped)". By setting opcache.huge_code_pages=0 at /etc/php.d/10-opcache.ini the issue gets fixed Actual result: -------------- (gdb) run /usr/local/bin/composer Starting program: /usr/bin/php /usr/local/bin/composer [Thread debugging using libthread_db enabled] Program received signal SIGSEGV, Segmentation fault. zend_llist_del_element (l=0x9dc8e0, element=0x0, compare=0x7ffff1b40590 <accelerator_remove_cb>) at /usr/src/debug/php-7.0.0RC8/Zend/zend_llist.c:91 91 { (gdb) bt #0 zend_llist_del_element (l=0x9dc8e0, element=0x0, compare=0x7ffff1b40590 <accelerator_remove_cb>) at /usr/src/debug/php-7.0.0RC8/Zend/zend_llist.c:91 #1 0x00007ffff1b425b1 in zps_startup_failure (extension=<value optimized out>) at /usr/src/debug/php-7.0.0RC8/ext/opcache/ZendAccelerator.c:2336 #2 accel_startup (extension=<value optimized out>) at /usr/src/debug/php-7.0.0RC8/ext/opcache/ZendAccelerator.c:2621 #3 0x00000000005edbb1 in zend_extension_startup (extension=0xa26c80) at /usr/src/debug/php-7.0.0RC8/Zend/zend_extensions.c:176 #4 0x00000000005d7123 in zend_llist_apply_with_del (l=0x9dc8e0, func=0x5edba0 <zend_extension_startup>) at /usr/src/debug/php-7.0.0RC8/Zend/zend_llist.c:171 #5 0x00000000005edb97 in zend_startup_extensions () at /usr/src/debug/php-7.0.0RC8/Zend/zend_extensions.c:197 #6 0x0000000000585815 in php_module_startup (sf=<value optimized out>, additional_modules=<value optimized out>, num_additional_modules=<value optimized out>) at /usr/src/debug/php-7.0.0RC8/main/main.c:2197 #7 0x00000000006761bd in php_cli_startup (sapi_module=<value optimized out>) at /usr/src/debug/php-7.0.0RC8/sapi/cli/php_cli.c:423 #8 0x00000000006778e1 in main (argc=2, argv=0x9dfad0) at /usr/src/debug/php-7.0.0RC8/sapi/cli/php_cli.c:1325 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=70977&edit=1