Merge 3.18.62 into android-3.18

Changes in 3.18.62
	ipv6: avoid unregistering inet6_dev for loopback
	tcp: reset sk_rx_dst in tcp_disconnect()
	net: prevent sign extension in dev_get_stats()
	ipv6: dad: don't remove dynamic addresses if link is down
	brcmfmac: fix possible buffer overflow in brcmf_cfg80211_mgmt_tx()
	cfg80211: Define nla_policy for NL80211_ATTR_LOCAL_MESH_POWER_MODE
	cfg80211: Validate frequencies nested in NL80211_ATTR_SCAN_FREQUENCIES
	cfg80211: Check if PMKID attribute is of expected size
	irqchip/gic-v3: Fix out-of-bound access in gic_set_affinity
	parisc: Report SIGSEGV instead of SIGBUS when running out of stack
	parisc: use compat_sys_keyctl()
	parisc: DMA API: return error instead of BUG_ON for dma ops on non dma devs
	parisc/mm: Ensure IRQs are off in switch_mm()
	tools/lib/lockdep: Reduce MAX_LOCK_DEPTH to avoid overflowing lock_chain/: Depth
	kernel/extable.c: mark core_kernel_text notrace
	fs/dcache.c: fix spin lockup issue on nlru->lock
	checkpatch: silence perl 5.26.0 unescaped left brace warnings
	exec: Limit arg stack to at most 75% of _STK_LIM
	vt: fix unchecked __put_user() in tioclinux ioctls
	mm: fix overflow check in expand_upwards()
	crypto: talitos - Extend max key length for SHA384/512-HMAC and AEAD
	crypto: atmel - only treat EBUSY as transient if backlog
	crypto: sha1-ssse3 - Disable avx2
	crypto: caam - fix signals handling
	sched/topology: Optimize build_group_mask()
	sched/topology: Fix overlapping sched_group_mask
	PM / QoS: return -EINVAL for bogus strings
	tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results
	Linux 3.18.62

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