Merge 4.4.179 into android-4.4

Changes in 4.4.179
	arm64: debug: Don't propagate UNKNOWN FAR into si_code for debug signals
	arm64: debug: Ensure debug handlers check triggering exception level
	ext4: cleanup bh release code in ext4_ind_remove_space()
	lib/int_sqrt: optimize initial value compute
	tty/serial: atmel: Add is_half_duplex helper
	mm: mempolicy: make mbind() return -EIO when MPOL_MF_STRICT is specified
	i2c: core-smbus: prevent stack corruption on read I2C_BLOCK_DATA
	Bluetooth: Fix decrementing reference count twice in releasing socket
	tty/serial: atmel: RS485 HD w/DMA: enable RX after TX is stopped
	CIFS: fix POSIX lock leak and invalid ptr deref
	h8300: use cc-cross-prefix instead of hardcoding h8300-unknown-linux-
	tracing: kdb: Fix ftdump to not sleep
	gpio: gpio-omap: fix level interrupt idling
	sysctl: handle overflow for file-max
	enic: fix build warning without CONFIG_CPUMASK_OFFSTACK
	mm/cma.c: cma_declare_contiguous: correct err handling
	mm/page_ext.c: fix an imbalance with kmemleak
	mm/vmalloc.c: fix kernel BUG at mm/vmalloc.c:512!
	mm/slab.c: kmemleak no scan alien caches
	ocfs2: fix a panic problem caused by o2cb_ctl
	f2fs: do not use mutex lock in atomic context
	fs/file.c: initialize init_files.resize_wait
	cifs: use correct format characters
	dm thin: add sanity checks to thin-pool and external snapshot creation
	cifs: Fix NULL pointer dereference of devname
	fs: fix guard_bio_eod to check for real EOD errors
	tools lib traceevent: Fix buffer overflow in arg_eval
	usb: chipidea: Grab the (legacy) USB PHY by phandle first
	scsi: core: replace GFP_ATOMIC with GFP_KERNEL in scsi_scan.c
	coresight: etm4x: Add support to enable ETMv4.2
	ARM: 8840/1: use a raw_spinlock_t in unwind
	mmc: omap: fix the maximum timeout setting
	e1000e: Fix -Wformat-truncation warnings
	IB/mlx4: Increase the timeout for CM cache
	scsi: megaraid_sas: return error when create DMA pool failed
	perf test: Fix failure of 'evsel-tp-sched' test on s390
	SoC: imx-sgtl5000: add missing put_device()
	media: sh_veu: Correct return type for mem2mem buffer helpers
	media: s5p-jpeg: Correct return type for mem2mem buffer helpers
	media: s5p-g2d: Correct return type for mem2mem buffer helpers
	media: mx2_emmaprp: Correct return type for mem2mem buffer helpers
	leds: lp55xx: fix null deref on firmware load failure
	kprobes: Prohibit probing on bsearch()
	ARM: 8833/1: Ensure that NEON code always compiles with Clang
	ALSA: PCM: check if ops are defined before suspending PCM
	bcache: fix input overflow to cache set sysfs file io_error_halflife
	bcache: fix input overflow to sequential_cutoff
	bcache: improve sysfs_strtoul_clamp()
	fbdev: fbmem: fix memory access if logo is bigger than the screen
	cdrom: Fix race condition in cdrom_sysctl_register
	ASoC: fsl-asoc-card: fix object reference leaks in fsl_asoc_card_probe
	soc: qcom: gsbi: Fix error handling in gsbi_probe()
	mt7601u: bump supported EEPROM version
	ARM: avoid Cortex-A9 livelock on tight dmb loops
	tty: increase the default flip buffer limit to 2*640K
	media: mt9m111: set initial frame size other than 0x0
	hwrng: virtio - Avoid repeated init of completion
	soc/tegra: fuse: Fix illegal free of IO base address
	hpet: Fix missing '=' character in the __setup() code of hpet_mmap_enable
	dmaengine: imx-dma: fix warning comparison of distinct pointer types
	netfilter: physdev: relax br_netfilter dependency
	media: s5p-jpeg: Check for fmt_ver_flag when doing fmt enumeration
	regulator: act8865: Fix act8600_sudcdc_voltage_ranges setting
	wlcore: Fix memory leak in case wl12xx_fetch_firmware failure
	x86/build: Mark per-CPU symbols as absolute explicitly for LLD
	dmaengine: tegra: avoid overflow of byte tracking
	drm/dp/mst: Configure no_stop_bit correctly for remote i2c xfers
	binfmt_elf: switch to new creds when switching to new mm
	kbuild: clang: choose GCC_TOOLCHAIN_DIR not on LD
	x86/build: Specify elf_i386 linker emulation explicitly for i386 objects
	x86: vdso: Use $LD instead of $CC to link
	x86/vdso: Drop implicit common-page-size linker flag
	lib/string.c: implement a basic bcmp
	tty: mark Siemens R3964 line discipline as BROKEN
	tty: ldisc: add sysctl to prevent autoloading of ldiscs
	ipv6: Fix dangling pointer when ipv6 fragment
	ipv6: sit: reset ip header pointer in ipip6_rcv
	net: rds: force to destroy connection if t_sock is NULL in rds_tcp_kill_sock().
	openvswitch: fix flow actions reallocation
	qmi_wwan: add Olicard 600
	sctp: initialize _pad of sockaddr_in before copying to user memory
	tcp: Ensure DCTCP reacts to losses
	netns: provide pure entropy for net_hash_mix()
	net: ethtool: not call vzalloc for zero sized memory request
	ip6_tunnel: Match to ARPHRD_TUNNEL6 for dev type
	ALSA: seq: Fix OOB-reads from strlcpy
	include/linux/bitrev.h: fix constant bitrev
	ASoC: fsl_esai: fix channel swap issue when stream starts
	block: do not leak memory in bio_copy_user_iov()
	genirq: Respect IRQCHIP_SKIP_SET_WAKE in irq_chip_set_wake_parent()
	ARM: dts: at91: Fix typo in ISC_D0 on PC9
	arm64: futex: Fix FUTEX_WAKE_OP atomic ops with non-zero result value
	xen: Prevent buffer overflow in privcmd ioctl
	sched/fair: Do not re-read ->h_load_next during hierarchical load calculation
	xtensa: fix return_address
	PCI: Add function 1 DMA alias quirk for Marvell 9170 SATA controller
	perf/core: Restore mmap record type correctly
	ext4: add missing brelse() in add_new_gdb_meta_bg()
	ext4: report real fs size after failed resize
	ALSA: echoaudio: add a check for ioremap_nocache
	ALSA: sb8: add a check for request_region
	IB/mlx4: Fix race condition between catas error reset and aliasguid flows
	mmc: davinci: remove extraneous __init annotation
	ALSA: opl3: fix mismatch between snd_opl3_drum_switch definition and declaration
	thermal/int340x_thermal: Add additional UUIDs
	thermal/int340x_thermal: fix mode setting
	tools/power turbostat: return the exit status of a command
	perf top: Fix error handling in cmd_top()
	perf evsel: Free evsel->counts in perf_evsel__exit()
	perf tests: Fix a memory leak of cpu_map object in the openat_syscall_event_on_all_cpus test
	perf tests: Fix a memory leak in test__perf_evsel__tp_sched_test()
	x86/hpet: Prevent potential NULL pointer dereference
	x86/cpu/cyrix: Use correct macros for Cyrix calls on Geode processors
	iommu/vt-d: Check capability before disabling protected memory
	x86/hw_breakpoints: Make default case in hw_breakpoint_arch_parse() return an error
	fix incorrect error code mapping for OBJECTID_NOT_FOUND
	ext4: prohibit fstrim in norecovery mode
	rsi: improve kernel thread handling to fix kernel panic
	9p: do not trust pdu content for stat item size
	9p locks: add mount option for lock retry interval
	f2fs: fix to do sanity check with current segment number
	serial: uartps: console_setup() can't be placed to init section
	ARM: samsung: Limit SAMSUNG_PM_CHECK config option to non-Exynos platforms
	ACPI / SBS: Fix GPE storm on recent MacBookPro's
	cifs: fallback to older infolevels on findfirst queryinfo retry
	crypto: sha256/arm - fix crash bug in Thumb2 build
	crypto: sha512/arm - fix crash bug in Thumb2 build
	iommu/dmar: Fix buffer overflow during PCI bus notification
	ARM: 8839/1: kprobe: make patch_lock a raw_spinlock_t
	appletalk: Fix use-after-free in atalk_proc_exit
	lib/div64.c: off by one in shift
	include/linux/swap.h: use offsetof() instead of custom __swapoffset macro
	tpm/tpm_crb: Avoid unaligned reads in crb_recv()
	ovl: fix uid/gid when creating over whiteout
	appletalk: Fix compile regression
	bonding: fix event handling for stacked bonds
	net: atm: Fix potential Spectre v1 vulnerabilities
	net: bridge: multicast: use rcu to access port list from br_multicast_start_querier
	net: fou: do not use guehdr after iptunnel_pull_offloads in gue_udp_recv
	tcp: tcp_grow_window() needs to respect tcp_space()
	ipv4: recompile ip options in ipv4_link_failure
	ipv4: ensure rcu_read_lock() in ipv4_link_failure()
	crypto: crypto4xx - properly set IV after de- and encrypt
	modpost: file2alias: go back to simple devtable lookup
	modpost: file2alias: check prototype of handler
	tpm/tpm_i2c_atmel: Return -E2BIG when the transfer is incomplete
	KVM: x86: Don't clear EFER during SMM transitions for 32-bit vCPU
	iio/gyro/bmg160: Use millidegrees for temperature scale
	iio: ad_sigma_delta: select channel when reading register
	iio: adc: at91: disable adc channel interrupt in timeout case
	io: accel: kxcjk1013: restore the range after resume.
	staging: comedi: vmk80xx: Fix use of uninitialized semaphore
	staging: comedi: vmk80xx: Fix possible double-free of ->usb_rx_buf
	staging: comedi: ni_usb6501: Fix use of uninitialized mutex
	staging: comedi: ni_usb6501: Fix possible double-free of ->usb_rx_buf
	ALSA: core: Fix card races between register and disconnect
	crypto: x86/poly1305 - fix overflow during partial reduction
	arm64: futex: Restore oldval initialization to work around buggy compilers
	x86/kprobes: Verify stack frame on kretprobe
	kprobes: Mark ftrace mcount handler functions nokprobe
	kprobes: Fix error check when reusing optimized probes
	mac80211: do not call driver wake_tx_queue op during reconfig
	Revert "kbuild: use -Oz instead of -Os when using clang"
	sched/fair: Limit sched_cfs_period_timer() loop to avoid hard lockup
	device_cgroup: fix RCU imbalance in error case
	mm/vmstat.c: fix /proc/vmstat format for CONFIG_DEBUG_TLBFLUSH=y CONFIG_SMP=n
	ALSA: info: Fix racy addition/deletion of nodes
	Revert "locking/lockdep: Add debug_locks check in __lock_downgrade()"
	kernel/sysctl.c: fix out-of-bounds access when setting file-max
	Linux 4.4.179

Change-Id: Ib81a248d73ba7504649be93bd6882b290e548882
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

10 files changed, 56 insertions, 17 deletions

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 0f9ada220789..fbdc21cab957 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6003,6 +6003,7 @@ static void perf_event_mmap_output(struct perf_event *event,
 	struct perf_output_handle handle;
 	struct perf_sample_data sample;
 	int size = mmap_event->event_id.header.size;
+	u32 type = mmap_event->event_id.header.type;
 	int ret;
 
 	if (!perf_event_mmap_match(event, data))
@@ -6046,6 +6047,7 @@ static void perf_event_mmap_output(struct perf_event *event,
 	perf_output_end(&handle);
 out:
 	mmap_event->event_id.header.size = size;
+	mmap_event->event_id.header.type = type;
 }
 
 static void perf_event_mmap_event(struct perf_mmap_event *mmap_event)
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 3c74e13a95dc..67aafc2b249c 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -1056,6 +1056,10 @@ int irq_chip_set_vcpu_affinity_parent(struct irq_data *data, void *vcpu_info)
 int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on)
 {
 	data = data->parent_data;
+
+	if (data->chip->flags & IRQCHIP_SKIP_SET_WAKE)
+		return 0;
+
 	if (data->chip->irq_set_wake)
 		return data->chip->irq_set_wake(data, on);
 
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index d8daf6c55d2b..a53998cba804 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -668,7 +668,6 @@ static void unoptimize_kprobe(struct kprobe *p, bool force)
 static int reuse_unused_kprobe(struct kprobe *ap)
 {
 	struct optimized_kprobe *op;
-	int ret;
 
 	BUG_ON(!kprobe_unused(ap));
 	/*
@@ -682,9 +681,8 @@ static int reuse_unused_kprobe(struct kprobe *ap)
 	/* Enable the probe again */
 	ap->flags &= ~KPROBE_FLAG_DISABLED;
 	/* Optimize it again (remove from op->list) */
-	ret = kprobe_optready(ap);
-	if (ret)
-		return ret;
+	if (!kprobe_optready(ap))
+		return -EINVAL;
 
 	optimize_kprobe(ap);
 	return 0;
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index a49c565529a0..774ab79d3ec7 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -3314,9 +3314,6 @@ __lock_set_class(struct lockdep_map *lock, const char *name,
 	unsigned int depth;
 	int i;
 
-	if (unlikely(!debug_locks))
-		return 0;
-
 	depth = curr->lockdep_depth;
 	/*
 	 * This function is about (re)setting the class of a held lock,
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 54cf946d1a4c..9b0352c34a3b 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -4478,12 +4478,15 @@ static enum hrtimer_restart sched_cfs_slack_timer(struct hrtimer *timer)
 	return HRTIMER_NORESTART;
 }
 
+extern const u64 max_cfs_quota_period;
+
 static enum hrtimer_restart sched_cfs_period_timer(struct hrtimer *timer)
 {
 	struct cfs_bandwidth *cfs_b =
 		container_of(timer, struct cfs_bandwidth, period_timer);
 	int overrun;
 	int idle = 0;
+	int count = 0;
 
 	raw_spin_lock(&cfs_b->lock);
 	for (;;) {
@@ -4491,6 +4494,28 @@ static enum hrtimer_restart sched_cfs_period_timer(struct hrtimer *timer)
 		if (!overrun)
 			break;
 
+		if (++count > 3) {
+			u64 new, old = ktime_to_ns(cfs_b->period);
+
+			new = (old * 147) / 128; /* ~115% */
+			new = min(new, max_cfs_quota_period);
+
+			cfs_b->period = ns_to_ktime(new);
+
+			/* since max is 1s, this is limited to 1e9^2, which fits in u64 */
+			cfs_b->quota *= new;
+			cfs_b->quota = div64_u64(cfs_b->quota, old);
+
+			pr_warn_ratelimited(
+        "cfs_period_timer[cpu%d]: period too short, scaling up (new cfs_period_us %lld, cfs_quota_us = %lld)\n",
+	                        smp_processor_id(),
+	                        div_u64(new, NSEC_PER_USEC),
+                                div_u64(cfs_b->quota, NSEC_PER_USEC));
+
+			/* reset count so we don't come right back in here */
+			count = 0;
+		}
+
 		idle = do_sched_cfs_period_timer(cfs_b, overrun);
 	}
 	if (idle)
@@ -7783,10 +7808,10 @@ static void update_cfs_rq_h_load(struct cfs_rq *cfs_rq)
 	if (cfs_rq->last_h_load_update == now)
 		return;
 
-	cfs_rq->h_load_next = NULL;
+	WRITE_ONCE(cfs_rq->h_load_next, NULL);
 	for_each_sched_entity(se) {
 		cfs_rq = cfs_rq_of(se);
-		cfs_rq->h_load_next = se;
+		WRITE_ONCE(cfs_rq->h_load_next, se);
 		if (cfs_rq->last_h_load_update == now)
 			break;
 	}
@@ -7796,7 +7821,7 @@ static void update_cfs_rq_h_load(struct cfs_rq *cfs_rq)
 		cfs_rq->last_h_load_update = now;
 	}
 
-	while ((se = cfs_rq->h_load_next) != NULL) {
+	while ((se = READ_ONCE(cfs_rq->h_load_next)) != NULL) {
 		load = cfs_rq->h_load;
 		load = div64_ul(load * se->avg.load_avg,
 			cfs_rq_load_avg(cfs_rq) + 1);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 9d36f3e586d1..28df0358ba94 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -126,7 +126,9 @@ static int zero;
 static int __maybe_unused one = 1;
 static int __maybe_unused two = 2;
 static int __maybe_unused four = 4;
+static unsigned long zero_ul;
 static unsigned long one_ul = 1;
+static unsigned long long_max = LONG_MAX;
 static int one_hundred = 100;
 #ifdef CONFIG_PRINTK
 static int ten_thousand = 10000;
@@ -1693,6 +1695,8 @@ static struct ctl_table fs_table[] = {
 		.maxlen		= sizeof(files_stat.max_files),
 		.mode		= 0644,
 		.proc_handler	= proc_doulongvec_minmax,
+		.extra1		= &zero_ul,
+		.extra2		= &long_max,
 	},
 	{
 		.procname	= "nr_open",
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index d90b42b39908..6380ec0453e0 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -32,6 +32,7 @@
 #include <linux/list.h>
 #include <linux/hash.h>
 #include <linux/rcupdate.h>
+#include <linux/kprobes.h>
 
 #include <trace/events/sched.h>
 
@@ -5165,7 +5166,7 @@ static struct ftrace_ops control_ops = {
 	INIT_OPS_HASH(control_ops)
 };
 
-static inline void
+static nokprobe_inline void
 __ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
 		       struct ftrace_ops *ignored, struct pt_regs *regs)
 {
@@ -5214,11 +5215,13 @@ static void ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
 {
 	__ftrace_ops_list_func(ip, parent_ip, NULL, regs);
 }
+NOKPROBE_SYMBOL(ftrace_ops_list_func);
 #else
 static void ftrace_ops_no_ops(unsigned long ip, unsigned long parent_ip)
 {
 	__ftrace_ops_list_func(ip, parent_ip, NULL, NULL);
 }
+NOKPROBE_SYMBOL(ftrace_ops_no_ops);
 #endif
 
 /*
@@ -5239,6 +5242,7 @@ static void ftrace_ops_recurs_func(unsigned long ip, unsigned long parent_ip,
 
 	trace_clear_recursion(bit);
 }
+NOKPROBE_SYMBOL(ftrace_ops_recurs_func);
 
 /**
  * ftrace_ops_get_func - get the function a trampoline should call
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 74b20e3ab8c6..5e091614fe39 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -4042,6 +4042,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_consume);
  * ring_buffer_read_prepare - Prepare for a non consuming read of the buffer
  * @buffer: The ring buffer to read from
  * @cpu: The cpu buffer to iterate over
+ * @flags: gfp flags to use for memory allocation
  *
  * This performs the initial preparations necessary to iterate
  * through the buffer.  Memory is allocated, buffer recording
@@ -4059,7 +4060,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_consume);
  * This overall must be paired with ring_buffer_read_finish.
  */
 struct ring_buffer_iter *
-ring_buffer_read_prepare(struct ring_buffer *buffer, int cpu)
+ring_buffer_read_prepare(struct ring_buffer *buffer, int cpu, gfp_t flags)
 {
 	struct ring_buffer_per_cpu *cpu_buffer;
 	struct ring_buffer_iter *iter;
@@ -4067,7 +4068,7 @@ ring_buffer_read_prepare(struct ring_buffer *buffer, int cpu)
 	if (!cpumask_test_cpu(cpu, buffer->cpumask))
 		return NULL;
 
-	iter = kmalloc(sizeof(*iter), GFP_KERNEL);
+	iter = kmalloc(sizeof(*iter), flags);
 	if (!iter)
 		return NULL;
 
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index f2bfdecefd8e..5814e7386109 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3194,7 +3194,8 @@ __tracing_open(struct inode *inode, struct file *file, bool snapshot)
 	if (iter->cpu_file == RING_BUFFER_ALL_CPUS) {
 		for_each_tracing_cpu(cpu) {
 			iter->buffer_iter[cpu] =
-				ring_buffer_read_prepare(iter->trace_buffer->buffer, cpu);
+				ring_buffer_read_prepare(iter->trace_buffer->buffer,
+							 cpu, GFP_KERNEL);
 		}
 		ring_buffer_read_prepare_sync();
 		for_each_tracing_cpu(cpu) {
@@ -3204,7 +3205,8 @@ __tracing_open(struct inode *inode, struct file *file, bool snapshot)
 	} else {
 		cpu = iter->cpu_file;
 		iter->buffer_iter[cpu] =
-			ring_buffer_read_prepare(iter->trace_buffer->buffer, cpu);
+			ring_buffer_read_prepare(iter->trace_buffer->buffer,
+						 cpu, GFP_KERNEL);
 		ring_buffer_read_prepare_sync();
 		ring_buffer_read_start(iter->buffer_iter[cpu]);
 		tracing_iter_reset(iter, cpu);
diff --git a/kernel/trace/trace_kdb.c b/kernel/trace/trace_kdb.c
index 57149bce6aad..896458285fdd 100644
--- a/kernel/trace/trace_kdb.c
+++ b/kernel/trace/trace_kdb.c
@@ -50,14 +50,16 @@ static void ftrace_dump_buf(int skip_lines, long cpu_file)
 	if (cpu_file == RING_BUFFER_ALL_CPUS) {
 		for_each_tracing_cpu(cpu) {
 			iter.buffer_iter[cpu] =
-			ring_buffer_read_prepare(iter.trace_buffer->buffer, cpu);
+			ring_buffer_read_prepare(iter.trace_buffer->buffer,
+						 cpu, GFP_ATOMIC);
 			ring_buffer_read_start(iter.buffer_iter[cpu]);
 			tracing_iter_reset(&iter, cpu);
 		}
 	} else {
 		iter.cpu_file = cpu_file;
 		iter.buffer_iter[cpu_file] =
-			ring_buffer_read_prepare(iter.trace_buffer->buffer, cpu_file);
+			ring_buffer_read_prepare(iter.trace_buffer->buffer,
+						 cpu_file, GFP_ATOMIC);
 		ring_buffer_read_start(iter.buffer_iter[cpu_file]);
 		tracing_iter_reset(&iter, cpu_file);
 	}