Bug#443196: apache2-mpm-worker: reload after altering apache2.conf immediately eats all memory

[moog <moog@sysdev.oucs.ox.ac.uk>]

Package: apache2-mpm-worker
Version: 2.2.3-4+etch1
Severity: critical
Justification: breaks the whole system


Start with a simple apache2.conf containing two vhosts:

Listen 192.168.1.1:80
<VirtualHost 192.168.1.1:80>
  ServerName my.server
  DocumentRoot /var/www
</VirtualHost>

Listen 192.168.1.2:80
<VirtualHost 192.168.1.2:80>
  ServerName my.server
  DocumentRoot /var/www
</VirtualHost>

With Apache running, edit apache2.conf to remove the first vhost (i.e.
comment out the first Listen+VirtualHost section) and reload Apache
(SIGUSR1). It then consumes all memory, making the system unusable
until the process is killed.

-- System Information:
Debian Release: 4.0
  APT prefers stable
  APT policy: (500, 'stable'), (1, 'experimental')
Architecture: amd64
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-5-amd64
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)