Bug #81647 [Ver->Nab]: regex times out when pcre.jit is enabled

Edit report at https://bugs.php.net/bug.php?id=81647&edit=1 ID: 81647 Updated by: cmb@php.net Reported by: jack dot johansson at yahoo dot com Summary: regex times out when pcre.jit is enabled -Status: Verified +Status: Not a bug Type: Bug Package: PCRE related Operating System: Windows 11 22000.194 PHP Version: 8.1.0RC6 Assigned To: cmb Block user comment: N Private report: N New Comment: This is a stack overflow due to too deep nesting[1], because of the nature of that regex. It is not related to a recent patch to our bundled libpcre2[2]. Consider to report it upstream[3], but I'm not sure whether that can be fixed (by falling back to non JIT mode). [1] <https://gist.github.com/cmb69/7ce76968c3917c8234811cb52ec845e8> [2] <https://github.com/php/php-src/pull/7573> [3] <https://github.com/PhilipHazel/pcre2/issues> Previous Comments: ------------------------------------------------------------------------ [2021-11-22 10:13:49] cmb@php.net Thanks for the swift reply! I can confirm the crash when running mod_php, but not on CLI. I'll have a look. ------------------------------------------------------------------------ [2021-11-22 09:58:12] jack dot johansson at yahoo dot com I'm using the same version, 10.37 2021-05-26. It's bundled into this release on windows.php.net: https://windows.php.net/downloads/qa/php-8.1.0RC6-Win32-vs16-x64.zip Would you please take a look at the issue on the github link that I posted? There was someone with a similar issue too. ------------------------------------------------------------------------ [2021-11-22 09:34:55] cmb@php.net I can't reproduce this with the bundled libpcre2[1]. Which libpcre2 version do you use? [1] <https://3v4l.org/WBdZJ> ------------------------------------------------------------------------ [2021-11-21 21:15:24] jack dot johansson at yahoo dot com Description: ------------ I've recently installed PHP 8.1.0RC6 and Laravel 9 to test some new features. After requests resulted in a connection reset, I've submitted this bug on the Laravel repository: https://github.com/laravel/framework/issues/39716 Tracing the issue ended up to a regex, which crashed Apache when the pcre.jit was set to 1 in the ini file ( or commented out ). I'm using the latest version of Apache ( 2.4.51 ). Turning off the pcre.jit solves the issue. I'm not sure if this is a PHP issue, but I'm submitting a bug just in case. Test script: --------------- <?php var_dump( preg_match( '(([\\r\\n]{1,1000})|([^\\S\\r\\n]{1,1000})|(\\\\)|(\')|(")|(\\#)|(\\$)|(([^(\\s\\\\\'"\\#\\$)]|\\(|\\)){1,1000}))A', 'Laravel', $matches ) ); ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=81647&edit=1