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Bug #23285

zendlex coredump

Submitted:

2003-04-20 05:42 UTC

Modified:

2003-05-29 04:03 UTC

Votes:	1
Avg. Score:	1.0 ± 0.0
Reproduced:	0 of 1 (0.0%)

From:

[email protected]

Assigned:

wez (profile)

Status:

Closed

Package:

Scripting Engine problem

PHP Version:

4.3.3-dev

OS:

RH9

Private report:

CVE-ID:

None

View Developer Edit

[2003-04-20 05:42 UTC] [email protected]

coz the zendlex() function is recursive for some cases, it's quite easy dumping zend core.

e.g, just repeat the comments enough times on the following script (i did it 500,000 times but may less is nedded):
<? /**/ /**/ /*....... /**/ ?>


is this consider a bug?

Patches

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History

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[2003-05-20 19:19 UTC] [email protected]

Please try using this CVS snapshot:

  http://snaps.php.net/php4-STABLE-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php4-win32-STABLE-latest.zip

It appears recent changes have resolved this bug.

[2003-05-21 10:15 UTC] [email protected]

It still happens for me (using gcc 2.95.3)..

[2003-05-25 06:37 UTC] [email protected]

the bug still exists using gcc version 3.2.2 20030222 
here how u can easly reproduce it:

[root@moshe-lap php4]# cat ../../gen-php-seg.php
<?
$p = fopen("tmp","wb");
$str="";
for($a=0;$a<1024;$a++) $str.="/**/ ";
fwrite($p,"<? ");
for($a=0;$a<512;$a++) fwrite($p,$str);
fwrite($p," ?> ");
fclose($p);
?>

[root@moshe-lap php4]# ./sapi/cli/php ../../tmp
Segmentation fault

[2003-05-28 16:39 UTC] [email protected]

Try this patch:
http://www.php.net/~wez/zendlex.diff

[2003-05-28 20:05 UTC] [email protected]

Yes, that patch makes it not to crash anymore.
If there aren't any side-effects of it..commit? :)

[2003-05-29 04:03 UTC] [email protected]

This bug has been fixed in CVS.

In case this was a PHP problem, snapshots of the sources are packaged
every three hours; this change will be in the next snapshot. You can
grab the snapshot at http://snaps.php.net/.
 
In case this was a documentation problem, the fix will show up soon at
http://www.php.net/manual/.

In case this was a PHP.net website problem, the change will show
up on the PHP.net site and on the mirror sites in short time.
 
Thank you for the report, and for helping us make PHP better.

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