Edit report at https://bugs.php.net/bug.php?id=36463&edit=1
ID: 36463
Comment by: nicolas at toniazzi dot net
Reported by: sthapa at site5 dot com
Summary: preg_match crashes
Status: Bogus
Type: Bug
Package: PCRE related
Operating System: Linux
PHP Version: 5.1.2
Block user comment: N
Private report: N
New Comment:
I reduced the test case to this:
$count = 203;
$string = str_repeat("a", $count);
echo preg_match('/^(a)+$/', $s, $m);
Crashes for count > 202 on Windows 7, apache 2.2 and php 5.3.8 (all 64 bits).
But it's working with the CLI, using the same php.ini.
Adding the pcre.* directives in php.ini didn't help.
Previous Comments:
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[2010-01-20 23:22:24] [email protected]
Ah, I thought you meant the count=500 case crashed. The higher numbers is
simply overflowing libpcre's stack and you haven't set a sane limit. This is
not a bug. This is a limitation of the pcre library and a configuration issue
on your part. Add this to your php.ini:
pcre.backtrack_limit = 10000
pcre.recursion_limit = 10000
And I bet your crash will go away.
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[2010-01-20 23:08:12] liviu dot mirea at gmail dot com
On CentOS 5.4, PHP 5.3.1, Apache/2.2.3:
With "$count = 5947;" it works. With "$count = 5948;" or higher it silently
crashes. Apache error log: "[Thu Jan 21 01:02:15 2010] [notice] child pid 18136
exit signal Segmentation fault (11)"
rasmus at php at net, try giving it larger values.
------------------------------------------------------------------------
[2010-01-20 22:47:52] [email protected]
Works fine on Linux
------------------------------------------------------------------------
[2010-01-20 22:44:30] liviu dot mirea at gmail dot com
I tested it again and it crashed on my current configuration: PHP 5.3.1,
Apache/2.2.14 (Win32), Windows 7 (64 bit)
------------------------------------------------------------------------
[2010-01-19 16:06:51] [email protected]
Which web server? Apache?
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