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Bug #38449 Segfault when token_get_all is used
Submitted: 2006-08-14 11:37 UTC Modified: 2006-08-23 17:59 UTC
From: scottmacvicar at ntlworld dot com Assigned:
Status: Not a bug Package: Reproducible crash
PHP Version: 4.4.3 OS: FreeBSD 4.10-RELEASE-p5
Private report: No CVE-ID: None
View Developer Edit
 [2006-08-14 11:37 UTC] scottmacvicar at ntlworld dot com 
Description:
------------
Customer reported this issue and we've tracked it down to a segfault within token_get_all, we can't reproduce it on Linux or Windows but can on FreeBSD.

php -v
PHP 4.4.3 (cli) (built: Aug 14 2006 04:34:25)
Copyright (c) 1997-2006 The PHP Group
Zend Engine v1.3.0, Copyright (c) 1998-2004 Zend Technologies

Reproduce code:
---------------
<?php
$tokens = token_get_all('<?php $var = 2; ?>');
var_dump($tokens);
?>

Expected result:
----------------
Some output

Actual result:
--------------
Program received signal SIGSEGV, Segmentation fault.
0x80d216d in _efree ()
(gdb) bt
#0  0x80d216d in _efree ()
#1  0x80de408 in _zval_dtor ()
#2  0x4861f8e6 in tokenize () from /usr/local/lib/php/20020429/tokenizer.so
#3  0x48620041 in zif_token_get_all () from /usr/local/lib/php/20020429/tokenizer.so
#4  0x80f14bb in execute ()
#5  0x80df699 in zend_execute_scripts ()
#6  0x80ba79f in php_execute_script ()
#7  0x80f8241 in main ()
#8  0x805cf86 in _start ()

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 [2006-08-14 12:05 UTC] tony2001@php.net 
Works just fine on Linux and FreeBSD 5.4-RELEASE.
 [2006-08-14 15:44 UTC] scottmacvicar at ntlworld dot com 
I edited the ports Makefile to add --enable-tokenizer and removed the tokenizer as an extension and there was no crash.

I tried a similar setup on my debian box following the same procedure with tokenizer as an extension and had no problem. I'm going to look a little closer later on and see if I can identify what in particular is causing this on the FreeBSD box.
 [2006-08-14 15:44 UTC] scottmacvicar at ntlworld dot com 
Can someone mark this awaiting feedback again.
 [2006-08-14 17:24 UTC] tony2001@php.net 
Please reopen when/if you can add more info.
Thank you.
 [2006-08-23 17:53 UTC] scottmacvicar at ntlworld dot com 
We've had another customer report regarding this issue on a completely different server, same back trace but this time using PHP 4.4.2 and 4.11-RELEASE-p19

Is there anyway to produce more information that might help track this down?

The configure line is:
'./configure' '--enable-versioning' '--enable-memory-limit' '--with-layout=GNU' '--with-config-file-scan-dir=/usr/local/etc/php' '--disable-all' '--with-regex=php' '--disable-cli' '--with-apxs=/usr/local/sbin/apxs' '--disable-ipv6' '--prefix=/usr/local' 'i386-portbld-freebsd4.11'

tokenizer was built as a seperate module afterwards using the php4-tokenizer port.
 [2006-08-23 17:59 UTC] tony2001@php.net 
>We've had another customer report regarding this issue on
> a completely different server, same back trace but this
> time using PHP 4.4.2 and 4.11-RELEASE-p19

Please report FreeBSD bugs to FreeBSD peoples.
 
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