Bug #79998 [Opn->Fbk]: Opcache JIT segfault

Edit report at https://bugs.php.net/bug.php?id=79998&edit=1 ID: 79998 Updated by: dmitry@php.net Reported by: adam at adsar dot co dot uk Summary: Opcache JIT segfault -Status: Open +Status: Feedback Type: Bug Package: JIT Operating System: CentOS 8.2.2004 PHP Version: 8.0.0beta1 Block user comment: N Private report: N New Comment: Please, check this with PHP-8.0.0 or above. I can't reproduce the problem. Previous Comments: ------------------------------------------------------------------------ [2020-09-17 16:54:12] adam at adsar dot co dot uk Just a quick note - tested again on beta 4, and still seems to be breaking. Best, Adam ------------------------------------------------------------------------ [2020-08-19 17:14:42] adam at adsar dot co dot uk Description: ------------ We use the PEAR DB library to access a MySQL server. If we try and get a result from the MySQL server over 126 times, it segfaults when the JIT is enabled. opcache.jit_buffer_size=32M opcache.jit=1235 Test script: --------------- wget http://download.pear.php.net/package/PEAR-1.10.12.tgz tar zxvf PEAR-1.10.12.tgz mv PEAR-1.10.12/* ./ wget http://download.pear.php.net/package/DB-1.10.0.tgz tar zxvf DB-1.10.0.tgz mv DB-1.10.0/* ./ <?php require_once 'DB.php'; $db = DB::connect("mysqli://username:password@databaseIP/databasename"); for($i=0;$i<127;$i++) { $db->getOne("select 1"); } Actual result: -------------- PID: 7535 (php-fpm) UID: 48 (apache) GID: 48 (apache) Signal: 11 (SEGV) Timestamp: Wed 2020-08-19 16:49:30 UTC (42s ago) Command Line: php-fpm: pool www Executable: /opt/remi/php80/root/usr/sbin/php-fpm Control Group: /system.slice/php80-php-fpm.service Unit: php80-php-fpm.service Slice: system.slice Boot ID: 90c2d9a3c0464be19521cd71a01a6959 Machine ID: 55930b9a23b7461d8dee6412d10a4e7b Hostname: handsetdeals Storage: /var/lib/systemd/coredump/core.php-fpm.48.90c2d9a3c0464be19521cd71a01a6959.7535.1597855770000000.lz4 Message: Process 7535 (php-fpm) of user 48 dumped core. Stack trace of thread 7535: #0 0x00007f81030a9687 __strlen_avx2 (libc.so.6) #1 0x000055f6bbf560ea xbuf_format_converter (php-fpm) #2 0x000055f6bbfb672d zend_vstrpprintf (php-fpm) #3 0x000055f6bbdf8c97 zend_error_va_list (php-fpm) #4 0x000055f6bbdf8ec7 zend_error (php-fpm) #5 0x00007f8100aee686 zend_jit_deprecated_helper (opcache.so) #6 0x000000004973971f n/a (n/a) (gdb) bt #0 0x00007f81030a9687 in __strlen_avx2 () from /lib64/libc.so.6 #1 0x000055f6bbf560ea in xbuf_format_converter (xbuf=0x7ffc6ede7a10, is_char=false, fmt=0x55f6bc0b1177 "s() is deprecated", ap=0x7ffc6ede7a80) at /usr/src/debug/php80-php-8.0.0~beta2-29.el8.remi.x86_64/main/spprintf.c:572 #2 0x000055f6bbfb672d in zend_vstrpprintf (max_len=max_len@entry=0, format=<optimized out>, ap=<optimized out>) at /usr/src/debug/php80-php-8.0.0~beta2-29.el8.remi.x86_64/Zend/zend.c:253 #3 0x000055f6bbdf8c97 in zend_error_va_list (orig_type=8192, error_filename=0x42042550 "/var/www/html/break/DB/common.php", error_lineno=1223, format=<optimized out>, args=<optimized out>) at /usr/src/debug/php80-php-8.0.0~beta2-29.el8.remi.x86_64/Zend/zend.c:1434 #4 0x000055f6bbdf8ec7 in zend_error (type=8192, format=0x55f6bc0b116b "Method %s::%s() is deprecated") at /usr/src/debug/php80-php-8.0.0~beta2-29.el8.remi.x86_64/Zend/zend.c:1507 #5 0x00007f8100aee686 in zend_jit_deprecated_helper () from /opt/remi/php80/root/usr/lib64/php/modules/opcache.so #6 0x000000004973971f in ?? () #7 0x000000004200f938 in ?? () #8 0x0000000049733557 in ?? () #9 0x00007ffc6edea1d0 in ?? () #10 0x0000000042053a10 in ?? () #11 0x0000000000000008 in ?? () #12 0x000055f6bbf6f252 in php_stdiop_close (stream=0x7f8100e16230, close_handle=<optimized out>) at /usr/src/debug/php80-php-8.0.0~beta2-29.el8.remi.x86_64/main/streams/plain_wrapper.c:514 #13 0x000055f600000002 in ?? () #14 0x00007f8100e692a0 in ?? () #15 0x0000000000000001 in ?? () #16 0x000055f6bc52be10 in executor_globals () #17 0xb2ebdc8315da0700 in ?? () #18 0x00007ffc6edea1d0 in ?? () #19 0x00007f8100e16020 in ?? () #20 0x000055f6bc52bce0 in ?? () #21 0x00007f8100e02000 in ?? () #22 0x0000000000000000 in ?? () ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79998&edit=1