Bug#511103: apache2-mpm-prefork: MPM Prefork/Itk Segmentation fault under heavy load

[Frederic VANNIERE <f.vanniere@planet-work.com>]

Package: apache2-mpm-prefork
Version: 2.2.9-10+lenny1
Severity: normal


Under some heavy load, with the default configuration and even without any
module, apache2 segfaults : 

[Wed Jan 07 14:42:27 2009] [notice] child pid 11525 exit signal Segmentation fault (11)
[Wed Jan 07 14:42:27 2009] [notice] child pid 11526 exit signal Segmentation fault (11)
[Wed Jan 07 14:42:27 2009] [notice] child pid 11527 exit signal Segmentation fault (11)
[Wed Jan 07 14:42:27 2009] [notice] child pid 11528 exit signal Segmentation fault (11)


Tested on 2 different servers (64bit) and can be reproduced with : 

  ab -n 100000 -c 500   http://localhost/

No issue with apache2-mpm-worked. 


-- System Information:
Debian Release: 5.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.27.8-em64t (SMP w/4 CPU cores)
Locale: LANG=fr_FR@euro, LC_CTYPE=fr_FR@euro (charmap=ISO-8859-15)
Shell: /bin/sh linked to /bin/bash

Versions of packages apache2-mpm-prefork depends on:
ii  apache2.2-common         2.2.9-10+lenny1 Apache HTTP Server common files
ii  libapr1                  1.2.12-5        The Apache Portable Runtime Librar
ii  libaprutil1              1.2.12+dfsg-8   The Apache Portable Runtime Utilit
ii  libc6                    2.7-16          GNU C Library: Shared libraries
ii  libpcre3                 7.6-2.1         Perl 5 Compatible Regular Expressi

apache2-mpm-prefork recommends no packages.

apache2-mpm-prefork suggests no packages.