Description: net_ns: oom killer fires because of slow net_ns cleanup
References:
 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629373
 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/720095
Notes:
 jmm> Only exploitable with CAP_NET_ADMIN
Bugs:
upstream: released (2.6.35)
2.6.32-upstream-stable: ignored "triggerable with CAP_NET_ADMIN only, vsftpd attack vector was fixed"
sid: released (2.6.35-1)
2.6.26-lenny-security: ignored "triggerable with CAP_NET_ADMIN only, vsftpd attack vector was fixed"
2.6.32-squeeze-security: ignored "triggerable with CAP_NET_ADMIN only, vsftpd attack vector was fixed"