Merge 4.4.277 into android-4.4-p

Changes in 4.4.277
	ARM: brcmstb: dts: fix NAND nodes names
	ARM: dts: BCM63xx: Fix NAND nodes names
	ARM: dts: imx6: phyFLEX: Fix UART hardware flow control
	ARM: imx: pm-imx5: Fix references to imx5_cpu_suspend_info
	thermal/core: Correct function name thermal_zone_device_unregister()
	kbuild: mkcompile_h: consider timestamp if KBUILD_BUILD_TIMESTAMP is set
	scsi: aic7xxx: Fix unintentional sign extension issue on left shift of u8
	sched/fair: Fix CFS bandwidth hrtimer expiry type
	Revert "memory: fsl_ifc: fix leak of IO mapping on probe failure"
	x86/fpu: Make init_fpstate correct with optimized XSAVE
	net: ipv6: fix return value of ip6_skb_dst_mtu
	net: bcmgenet: Ensure all TX/RX queues DMAs are disabled
	net: moxa: fix UAF in moxart_mac_probe
	net: ti: fix UAF in tlan_remove_one
	net: validate lwtstate->data before returning from skb_tunnel_info()
	tcp: annotate data races around tp->mtu_info
	ipv6: tcp: drop silly ICMPv6 packet too big messages
	iavf: Fix an error handling path in 'iavf_probe()'
	igb: Check if num of q_vectors is smaller than max before array access
	perf test bpf: Free obj_buf
	perf probe-file: Delete namelist in del_events() on the error path
	s390/bpf: Perform r1 range checking before accessing jit->seen_reg[r1]
	net: fix uninit-value in caif_seqpkt_sendmsg
	net: decnet: Fix sleeping inside in af_decnet
	netrom: Decrease sock refcount when sock timers expire
	scsi: iscsi: Fix iface sysfs attr detection
	scsi: target: Fix protect handling in WRITE SAME(32)
	Revert "USB: quirks: ignore remote wake-up on Fibocom L850-GL LTE modem"
	proc: Avoid mixing integer types in mem_rw()
	s390/ftrace: fix ftrace_update_ftrace_func implementation
	ALSA: sb: Fix potential ABBA deadlock in CSP driver
	xhci: Fix lost USB 2 remote wake
	KVM: PPC: Book3S: Fix H_RTAS rets buffer overflow
	usb: hub: Disable USB 3 device initiated lpm if exit latency is too high
	USB: usb-storage: Add LaCie Rugged USB3-FW to IGNORE_UAS
	usb: max-3421: Prevent corruption of freed memory
	usb: renesas_usbhs: Fix superfluous irqs happen after usb_pkt_pop()
	USB: serial: option: add support for u-blox LARA-R6 family
	USB: serial: cp210x: fix comments for GE CS1000
	USB: serial: cp210x: add ID for CEL EM3588 USB ZigBee stick
	tracing: Fix bug in rb_per_cpu_empty() that might cause deadloop.
	media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf()
	net: bcmgenet: ensure EXT_ENERGY_DET_MASK is clear
	iio: accel: bma180: Use explicit member assignment
	iio: accel: bma180: Fix BMA25x bandwidth register values
	btrfs: compression: don't try to compress if we don't have enough pages
	Linux 4.4.277

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I7159a9fb5545e504222fcee566c6661c1070c8f7

2 files changed, 3 insertions, 2 deletions

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index eb191af53924..aa142584f006 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -277,7 +277,7 @@ void tcp_v4_mtu_reduced(struct sock *sk)
 
 	if ((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE))
 		return;
-	mtu = tcp_sk(sk)->mtu_info;
+	mtu = READ_ONCE(tcp_sk(sk)->mtu_info);
 	dst = inet_csk_update_pmtu(sk, mtu);
 	if (!dst)
 		return;
@@ -444,7 +444,7 @@ void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
 			if (sk->sk_state == TCP_LISTEN)
 				goto out;
 
-			tp->mtu_info = info;
+			WRITE_ONCE(tp->mtu_info, info);
 			if (!sock_owned_by_user(sk)) {
 				tcp_v4_mtu_reduced(sk);
 			} else {
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 5a56b2356dde..17388adedc7d 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -1353,6 +1353,7 @@ int tcp_mtu_to_mss(struct sock *sk, int pmtu)
 	return __tcp_mtu_to_mss(sk, pmtu) -
 	       (tcp_sk(sk)->tcp_header_len - sizeof(struct tcphdr));
 }
+EXPORT_SYMBOL(tcp_mtu_to_mss);
 
 /* Inverse of above */
 int tcp_mss_to_mtu(struct sock *sk, int mss)