[Bug 646706] [NEW] NWFilter support broken due to Apparmour restrictions

[Soren Hansen]

Public bug reported:

Somewhere in the code path to instantiate nwfilters, libvirt fetches the
relevant network interface's index. This is done through a ioctl on a a
socket fd. This socket fd is created with socket(PF_SOCKET, SOCK_DGRAM,
0). Apparmour blocks this socket() call. According to netdevice(7):

   Linux  supports some standard ioctls to configure network devices.
   They can be used on any socket's file descriptor regardless of the family or type.

Changing PF_SOCKET to PF_INET works as expected. However, given how
close we are to release, I'm not super comfortable making this change,
so I'm proposing we add "network socket dgram" to
/etc/apparmor.d/usr.sbin.libvirtd instead and revisit this for natty.

Comments?

** Affects: libvirt (Ubuntu)
     Importance: Undecided
         Status: New

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NWFilter support broken due to Apparmour restrictions
https://bugs.launchpad.net/bugs/646706
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