kernel security and bug fix update

2.6.32-642.4.2 - net tcp: make challenge acks less predictable Florian Westphal 1355606 1355607 CVE-2016-5696 2.6.32-642.4.1 - ipmi Remove smimsg from waitingrcvmsgs list before handleonerecvmsg David Arcari 1355980 1347189 - fs ext4: Remove useless spinlock in ext4getattr Lukas Czerner 1355981...