From: imacat at mail dot imacat dot idv dot tw
Operating system: Debian 3.0r1/Linux 2.4.20
PHP version: 4.3.2
PHP Bug Type: PCRE related
Bug description: segmentation fault in preg_match()
The following simple test script caused a segmentation fault:
[EMAIL PROTECTED] ~ % cat test.php
<?php
$a = "";
for ($i = 0; $i < 10000; $i++) {
$a .= "\x5F ";
}
preg_match("/(..)+(\x5Fa|\x5F@)/", $a);
?>
[EMAIL PROTECTED] ~ % php test.php
zsh: segmentation fault php test.php
[EMAIL PROTECTED] ~ %
No core dump. This piece of code was part of a complex regular expression
to match against URLs in a piece of DBCS plain text. This is a
most-simplified scratch that can illustrate the segmentation fault, so
please don't ask me what this non-sense scratch is for. It first crashed
under apache/mod_php4 4.3.1, and I found it crashes under php 4.3.2, too,
both as apache/mod_php4 and php client binary.
I have rewritten my subroutine to avoid this problem. It required
rewriting anyway.
This happens on my Debian 3.0r1x2 and Red Hat 9, all using gcc 3.3 and
glibc 2.3.2. On my other 2 Red Hat 9, it enters an infinite loop and used
up all the CPU time.
Please tell me if you need more infomation on this.
--
Edit bug report at http://bugs.php.net/?id=24008&edit=1
--
Try a CVS snapshot: http://bugs.php.net/fix.php?id=24008&r=trysnapshot
Fixed in CVS: http://bugs.php.net/fix.php?id=24008&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=24008&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=24008&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=24008&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=24008&r=support
Expected behavior: http://bugs.php.net/fix.php?id=24008&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=24008&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=24008&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=24008&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=24008&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=24008&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=24008&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=24008&r=gnused
