From:
Operating system: Ubuntu 11.04
PHP version: 5.3.9
Package: PCRE related
Bug Type: Bug
Bug description:Recursive functions for preg_replace_callback causes SEGFAULT
Description:
------------
Using recursive functions for preg_replace_callback that never ends PHP
will exit with a SEGFAULT (unexpected signal 11) due to a function stack
overflow.
It's expected that it should never end and therefore PHP should abort the
execution. However PHP should output a helpful error message rather than
just aborting it. Depending on your code this could be a major issue to
debug. (I was using Drupal and it look me hours to find the source.)
Test script:
---------------
<?php
function a() {
b();
}
function b() {
a();
}
preg_replace_callback("/0/s", 'a', "0");
echo "We made it my friend!";
Expected result:
----------------
Some sort of error message that the callback stack limit has been reached.
Actual result:
--------------
A 500 Internal Server error (Apache with mod_fcgid) and a SEGFAULT in the
error log.
--
Edit bug report at https://bugs.php.net/bug.php?id=60927&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=60927&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=60927&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=60927&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=60927&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=60927&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=60927&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=60927&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=60927&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=60927&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=60927&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=60927&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=60927&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=60927&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=60927&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=60927&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=60927&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=60927&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=60927&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=60927&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=60927&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=60927&r=mysqlcfg
