Edit report at https://bugs.php.net/bug.php?id=62049&edit=1
ID: 62049 Comment by: arvids dot kokins at di dot lv Reported by: arvids dot kokins at di dot lv Summary: A specific regex/input combo crashes PHP Status: Not a bug Type: Bug Package: PCRE related Operating System: Windows PHP Version: 5.4.3 Block user comment: N Private report: N New Comment: Thanks, it did the trick. I'm still slightly curious about the part that caused the stack overflow though -- but I guess I'll have to take it up with the developers of PCRE. Previous Comments: ------------------------------------------------------------------------ [2012-05-16 21:30:15] paj...@php.net Increase the stack of the apache binaries or use the stack configuration option in the apache configuration. That's not something PHP can change. As you can see it works just fine in CLI (php stack size is used there). ------------------------------------------------------------------------ [2012-05-16 21:00:44] arvids dot kokins at di dot lv Another example: http://ideone.com/L29ib If I remove the round brackets, the example works though: http://ideone.com/3ILgY ------------------------------------------------------------------------ [2012-05-16 20:34:07] arvids dot kokins at di dot lv Looks like a warning is thrown with an internal error: http://codepad.org/FmlJi8N9 Some configurations need bigger input strings to trigger a crash, some react differently... Got HTTP error 101 (connection was reset) at home with the word "error" repeated 25 times. ------------------------------------------------------------------------ [2012-05-16 19:58:30] nulle at gmx dot com Apache 2.2.9 PHP 5.3.1 Windows Everything works fine. ------------------------------------------------------------------------ [2012-05-16 15:54:06] arvids dot kokins at di dot lv Description: ------------ Test script crashes on web server (Apache 2.2.21) only with "empty response" (324). Suspected to be a limit/overflow problem since it works if "errorerror" is replaced with "error". Test script: --------------- <?php echo preg_match( '/^<a(.)+class="(.)?actor-link(.)?"(.)+>Super User<\/a>/', '<a class="actor-link" href="/errorerror.lv/lv/jomsocial/42-super-user/profile">Super User</a> added 2 new photos in <a href="/errorerror.lv/lv/jomsocial/42-super-user/photos/album?albumid=1">crap</a> album' ); echo "\nFINISHED!"; ?> Expected result: ---------------- "1\nFINISHED" Actual result: -------------- HTTP error 324: empty response. Probably PHP crash. Apache didn't crash. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=62049&edit=1
