Security update for the Linux Kernel (Live Patch 2 for SLE 12 SP2) (important)

This update for the Linux Kernel 4.4.21-84 fixes several issues.

The following security issues were fixed:

• CVE-2017-16939: The XFRM dump policy implementation in
  net/xfrm/xfrm_user.c kernel allowed local users to gain privileges or
  cause a denial of service (use-after-free) via a crafted SO_RCVBUF
  setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink
  messages (bsc#1069708).
• CVE-2017-10661: Race condition in fs/timerfd.c allowed local users to
  gain privileges or cause a denial of service (list corruption or
  use-after-free) via simultaneous file-descriptor operations that
  leverage improper might_cancel queueing (bsc#1053153).

This non-security issue was fixed:

• bsc#1062847: Enable proper shut down if NIC teaming is enabled