Bug#867565: Apache2 wsgi segfaults with moinmoin wiki (python2.7)

[Andreas Huewel <A.Huewel@hoertech.de>]

I think it seems like same issue here

After succeeding initial fresh debain 9 stable amd64 install (as
webserver) I was able to run the apache2 driven wiki fro whole day.
Now after the weekend I see: it has segfaulted and I cannot access the
wiki. I CAN restart apache2 via sudo service apache2 restart. But that
would not be a real solution for our small internal wiki workflow :-/

This is in my messages log:

htpcwiki kernel: [340598.118276] apache2[9540]: segfault at 7f081d81c7a0
ip 00007f081d81c7a0 sp 00007ffc29b3db88 error 14 in
libexpat.so.1.6.2[7f081f885000+27000]


#########################################################

= Notes Installing Wiki =
see [[https://master19.moinmo.in/InstallDocs#server| MoinMoin Server
Installation]]

== setup Debian ==
''Debian 9 Stretch netinstall'' to USB Stick, boot it, run
Expert-Installer...

 * Paket-Vorauswahl: web-server, ssh, drucker, grundsystem -> (no desktop)

== Setup Web Server and Wiki ==
see https://moinmo.in/HowTo/UbuntuQuick

 * Webserver and python:
{{{
> sudo apt-get update
> sudo apt-get install -y python-pip python-dev build-essential
> sudo apt-get install apache2 libapache2-mod-wsgi
}}}

 * MoinMoin
See https://moinmo.in/MoinMoinDownload
{{{
> cd ~/Download
> wget http://static.moinmo.in/files/moin-1.9.9.tar.gz
> sha256sum moin-1.9.9.tar.gz
> tar -xzf moin-1.9.9.tar.gz
}}}
apply patch
[[https://bitbucket.org/thomaswaldmann/moin-1.9/commits/561b7a9c2bd91b61d26cd8a5f39aa36bf5c6159e|fix
wrong digestmod of hmac.new calls]]

{{{
sudo python setup.py install --force --record=install.log
--prefix='/usr/local' --install-data=/srv/wiki
}}}

 * Test:
{{{
> cd /srv/wiki/share/moin/server
> sudo python test.wsgi
}}}

 * Configure MoinMoin and Apache2

{{{
> cd /srv/wiki/share/moin/
> sudo cp server/moin.wsgi .
> sudo cp config/wikiconfig.py .
> sudo emacs /etc/apache2/apache2.conf

#


#  MoinMoin WSGI configuration


#


# you will invoke your moin wiki at the root url, like
http://servername/FrontPage:

WSGIScriptAlias /   /srv/wiki/share/moin/moin.wsgi

# create some wsgi daemons - use these parameters for a simple setup


WSGIDaemonProcess moin user=www-data group=www-data processes=5
threads=10 maximum-requests=1000 umask=0007

# use the daemons we defined above to process requests!


WSGIProcessGroup moin

<Directory "/srv/wiki/share/moin">
    Options All
    AllowOverride All
    Require all granted
    Allow from all
</Directory>

}}}

* WSGI stuff

{{{
> sudo emacs /srv/wiki/share/moin/moin.wsgi
}}}
add at the end of a1) paragraph the line
{{{
sys.path.insert(0, '/usr/local/lib/python2.7/site-packages')
}}}
and add at the end of the a2) paragraph the line:
{{{
sys.path.insert(0, '/srv/wiki/share/moin')
}}}

 * change owner+atttributes
{{{
> cd /srv/wiki/share
> sudo chown -R www-data:www-data moin
> sudo chmod -R ug+rwx moin
> sudo chmod -R o-rwx moin
}}}

 * restart apache
{{{
sudo service apache2 restart
}}}

Test: browse to http://<IP>/ ... voila it works!