Merge 3.18.82 into android-3.18

Changes in 3.18.82
	Revert "ceph: unlock dangling spinlock in try_flush_caps()"
	mac80211: accept key reinstall without changing anything
	mac80211: use constant time comparison with keys
	mac80211: don't compare TKIP TX MIC key in reinstall prevention
	usb: usbtest: fix NULL pointer dereference
	Input: ims-psu - check if CDC union descriptor is sane
	Revert "ARM: dts: imx53-qsb-common: fix FEC pinmux config"
	tun/tap: sanitize TUNSETSNDBUF input
	tcp: fix tcp_mtu_probe() vs highest_sack
	l2tp: check ps->sock before running pppol2tp_session_ioctl()
	tun: call dev_get_valid_name() before register_netdevice()
	sctp: add the missing sock_owned_by_user check in sctp_icmp_redirect
	net/unix: don't show information about sockets from other namespaces
	tun: allow positive return values on dev_get_valid_name() call
	sctp: reset owner sk for data chunks on out queues when migrating a sock
	ipv6: flowlabel: do not leave opt->tot_len with garbage
	ipip: only increase err_count for some certain type icmp in ipip_err
	ip6_gre: only increase err_count for some certain type icmpv6 in ip6gre_err
	security/keys: add CONFIG_KEYS_COMPAT to Kconfig
	target/iscsi: Fix iSCSI task reassignment handling
	Linux 3.18.82

Change-Id: I860d49ec77ab43d00514c308fcec80a8ea73c993
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>