Merge remote-tracking branch 'origin/upstream-linux-3.18.y' into XOS-8.1

Linux 3.18.136

ax25: fix possible use-after-free

mISDN: fix a race in dev_expire_timer()

net/x25: do not hold the cpu too long in x25_new_lci()

kvm: fix kvm_ioctl_create_device() reference counting (CVE-2019-6974)

hwmon: (lm80) Fix missing unlock on error in set_fan_div()

net: ipv4: use a dedicated counter for icmp_v4 redirect packets

net: stmmac: Fix a race in EEE enable callback

vsock: cope with memory allocation failure at socket creation time

vxlan: test dev->flags & IFF_UP before calling netif_rx()

tcp: clear icsk_backoff in tcp_write_queue_purge()

tcp: tcp_v4_err() should be more careful

sky2: Increase D3 delay again

net: fix IPv6 prefix route residue