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Bug #61662 header() cause apache to segfault
Submitted: 2012-04-07 22:03 UTC Modified: 2012-04-08 01:19 UTC
From: gmblar+php at gmail dot com Assigned:
Status: Not a bug Package: *General Issues
PHP Version: 5.4.0 OS: Debian 6
Private report: No CVE-ID: None
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 [2012-04-07 22:03 UTC] gmblar+php at gmail dot com 
Description:
------------
Apache segfault, when call header() with wrong parameters.

Test script:
---------------
header('Cache-Control', 'public,max-age=86400');


Expected result:
----------------
Nothing

Actual result:
--------------
httpd[26348]: [core:notice] [pid 26348:tid 47243385569824] AH00052: child pid 
26491 exit signal Segmentation fault (11), referer:

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 [2012-04-07 22:54 UTC] rasmus@php.net 
Are you sure that's all you have in your script? I tried this both on Debian and 
Ubuntu from CLI and under Apache and I also checked it with Valgrind. I see no 
memory issues with this.
 [2012-04-07 22:54 UTC] rasmus@php.net
-Status: Open +Status: Feedback
 [2012-04-08 00:15 UTC] gmblar+php at gmail dot com 
Tested with Apache 2.4 (mod_proxy_fcgi) and PHP-FPM 5.4.

Apache configuration: http://foobox.de/Apache/Konfiguration/
PHP configuration: http://foobox.de/PHP/info.php
 [2012-04-08 00:22 UTC] rasmus@php.net
-Status: Feedback +Status: Not a bug
 [2012-04-08 00:22 UTC] rasmus@php.net 
But if you are running php-fpm then there is no PHP code in your Apache process. 
It is only communicating via FastCGI. And since your segfault is in httpd then 
this isn't a PHP bug. It doesn't matter what we send over FastCGI to Apache, 
nothing we can possibly send should trigger a segfault. Report the bug to the 
Apache folks.
 [2012-04-08 00:24 UTC] gmblar+php at gmail dot com
-Status: Not a bug +Status: Open
 [2012-04-08 00:24 UTC] gmblar+php at gmail dot com 
The problem occurs only with Apache 2.4, not in the CLI version of php.

$ uname -a
Linux foobox 2.6.32-238.19.1.el5.028stab092.2 #1 SMP Thu Sep 22 13:24:07 MSD 2011 
x86_64 GNU/Linux

$ cat /etc/debian_version 
6.0.4
 [2012-04-08 00:29 UTC] rasmus@php.net
-Status: Open +Status: Not a bug
 [2012-04-08 00:29 UTC] rasmus@php.net 
Yes, but we can't fix bugs in Apache 2.4. Show me a stack of a segfault in actual 
PHP code and I can take a look.
 [2012-04-08 01:19 UTC] gmblar+php at gmail dot com 
Reported to Apache Bugtracker https://issues.apache.org/bugzilla/show_bug.cgi?
id=48272
 
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