[ELSA-2014-1959] kernel security and bug fix update

kernel
[2.6.18-400]
- [net] bridge: disable snooping if there is no querier (Frantisek Hrbata) [902454]
- [s390] kernel: sysinfo: convert /proc/sysinfo to seqfile (Alexander Gordeev) [1131283]
- [net] netlink: verify permisions of socket creator (Jiri Benc) [1094266] {CVE-2014-0181}
- [net] netlink: store effective caps at socket() time (Jiri Benc) [1094266] {CVE-2014-0181}
- [net] netlink: Rename netlink_capable netlink_allowed (Jiri Benc) [1094266] {CVE-2014-0181}
- [net] netlink: Fix permission check in netlink_connect() (Jiri Benc) [1094266] {CVE-2014-0181}
- [net] netlink: fix possible spoofing from non-root processes (Jiri Benc) [1094266] {CVE-2014-0181}
- [net] netlink: Make NETLINK_USERSOCK work again (Jiri Benc) [1094266] {CVE-2014-0181}
- [net] netlink: fix for too early rmmod (Jiri Benc) [1094266] {CVE-2014-0181}

[2.6.18-399]
- [kernel] do_setitimer: cancel real_timer if try_to_cancel fails (Oleg Nesterov) [1134654]