Pull GPIO fixes from Linus Walleij:
 "Some GPIO fixes that have been boiling the last two weeks or so.
  Nothing special, I'm trying to sort out some Kconfig business and
  Russell needs a fix in for -his SA1100 rework.

  Summary:

   - Revert a pointless attempt to add an include to solve the UM allyes
     compilation problem.

   - Make the mcp23s08 depend on OF_GPIO as it uses it and doesn't
     compile properly without it.

   - Fix a probing problem for ucb1x00"

* tag 'gpio-v4.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: sa1100: fix irq probing for ucb1x00
  gpio: mcp23s08: make driver depend on OF_GPIO
  Revert "gpio: include <linux/io-mapping.h> in gpiolib-of"

Pull fuse fix from Miklos Szeredi:
 "This fixes a deadlock when fuse, direct I/O and loop device are
  combined"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: direct-io: don't dirty ITER_BVEC pages

Pull overlayfs fix from Miklos Szeredi:
 "This fixes a regression caused by the last pull request"

* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: fix workdir creation

Pull btrfs fixes from Chris Mason:
 "I'm not proud of how long it took me to track down that one liner in
  btrfs_sync_log(), but the good news is the patches I was trying to
  blame for these problems were actually fine (sorry Filipe)"

* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  btrfs: introduce tickets_id to determine whether asynchronous metadata reclaim work makes progress
  btrfs: remove root_log_ctx from ctx list before btrfs_sync_log returns
  btrfs: do not decrease bytes_may_use when replaying extents

Pull sound fixes from Takashi Iwai:
 "We've got quite a few fixes at this time, and all are stable patches.

  syzkaller strikes back again (episode 19 or so), and we had to plug
  some holes in ALSA core part (mostly timer).

  In addition, a couple of FireWire audio fixes for the invalid copy
  user calls in locks, and a few quirks for HD-audio and USB-audio as
  usual are included"

* tag 'sound-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: rawmidi: Fix possible deadlock with virmidi registration
  ALSA: timer: Fix zero-division by continue of uninitialized instance
  ALSA: timer: fix NULL pointer dereference in read()/ioctl() race
  ALSA: fireworks: accessing to user space outside spinlock
  ALSA: firewire-tascam: accessing to user space outside spinlock
  ALSA: hda - Enable subwoofer on Dell Inspiron 7559
  ALSA: hda - Add headset mic quirk for Dell Inspiron 5468
  ALSA: usb-audio: Add sample rate inquiry quirk for B850V3 CP2114
  ALSA: timer: fix NULL pointer dereference on memory allocation failure
  ALSA: timer: fix division by zero after SNDRV_TIMER_IOCTL_CONTINUE

Pull arm64 fixes from Catalin Marinas:

 - smp_mb__before_spinlock() changed to smp_mb() on arm64 since the
   generic definition to smp_wmb() is not sufficient

 - avoid a recursive loop with the graph tracer by using using
   preempt_(enable|disable)_notrace in _percpu_(read|write)

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: use preempt_disable_notrace in _percpu_read/write
  arm64: spinlocks: implement smp_mb__before_spinlock() as smp_mb()

Pull powerpc fixes from Michael Ellerman:
 "Fixes marked for stable:
   - Don't alias user region to other regions below PAGE_OFFSET from
     Paul Mackerras
   - Fix again csum_partial_copy_generic() on 32-bit from Christophe
     Leroy
   - Fix corrupted PE allocation bitmap on releasing PE from Gavin Shan

  Fixes for code merged this cycle:
   - Fix crash on releasing compound PE from Gavin Shan
   - Fix processor numbers in OPAL ICP from Benjamin Herrenschmidt
   - Fix little endian build with CONFIG_KEXEC=n from Thiago Jung
     Bauermann"

* tag 'powerpc-4.8-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/mm: Don't alias user region to other regions below PAGE_OFFSET
  powerpc/32: Fix again csum_partial_copy_generic()
  powerpc/powernv: Fix corrupted PE allocation bitmap on releasing PE
  powerpc/powernv: Fix crash on releasing compound PE
  powerpc/xics/opal: Fix processor numbers in OPAL ICP
  powerpc/pseries: Fix little endian build with CONFIG_KEXEC=n

Pull ARM fixes from Russell King:
 "A few ARM fixes:

   - Robin Murphy noticed that the non-secure privileged entry was
     relying on undefined behaviour, which needed to be fixed.

   - Vladimir Murzin noticed that prov-v7 fails to build for MMUless
     configurations because a required header file wasn't included.

   - A bunch of fixes for StrongARM regressions found while testing
     4.8-rc on such platforms"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: sa1100: clear reset status prior to reboot
  ARM: 8600/1: Enforce some NS-SVC initialisation
  ARM: 8599/1: mm: pull asm/memory.h explicitly
  ARM: sa1100: register clocks early
  ARM: sa1100: fix 3.6864MHz clock

When debug preempt or preempt tracer is enabled, preempt_count_add/sub()
can be traced by function and function graph tracing, and
preempt_disable/enable() would call preempt_count_add/sub(), so in Ftrace
subsystem we should use preempt_disable/enable_notrace instead.

In the commit 345ddcc8 ("ftrace: Have set_ftrace_pid use the bitmap
like events do") the function this_cpu_read() was added to
trace_graph_entry(), and if this_cpu_read() calls preempt_disable(), graph
tracer will go into a recursive loop, even if the tracing_on is
disabled.

So this patch change to use preempt_enable/disable_notrace instead in
this_cpu_read().

Since Yonghui Yang helped a lot to find the root cause of this problem,
so also add his SOB.
Signed-off-by: NYonghui Yang <mark.yang@spreadtrum.com>
Signed-off-by: NChunyan Zhang <zhang.chunyan@linaro.org>
Acked-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

smp_mb__before_spinlock() is intended to upgrade a spin_lock() operation
to a full barrier, such that prior stores are ordered with respect to
loads and stores occuring inside the critical section.

Unfortunately, the core code defines the barrier as smp_wmb(), which
is insufficient to provide the required ordering guarantees when used in
conjunction with our load-acquire-based spinlock implementation.

This patch overrides the arm64 definition of smp_mb__before_spinlock()
to map to a full smp_mb().

Cc: <stable@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Reported-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

Pull ceph fix from Ilya Dryomov:
 "A fix for a 4.7 performance regression, caused by a typo in an if
  condition"

* tag 'ceph-for-4.8-rc6' of git://github.com/ceph/ceph-client:
  ceph: do not modify fi->frag in need_reset_readdir()

Pull dmi fix from Jean Delvare.

* 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  dmi-id: don't free dev structure after calling device_register

Pull ARM SoC fixes from Olof Johansson:
 "This is a slightly larger batch of fixes that we've been sitting on a
  few -rcs.  Most of them are simple oneliners, but there are two sets
  that are slightly larger and worth pointing out:

   - A set of patches to OMAP to deal with hwmod for RTC on am33xx
     (beaglebone SoC, among others).  It's the only clock that ever has
     a valid offset of 0, so a new flag needed introduction once this
     problem was discovered.

   - A collection of CCI fixes for performance counters discovered once
     people started using it on X-Gene CPUs"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (37 commits)
  arm-cci: pmu: Fix typo in event name
  Revert "ARM: tegra: fix erroneous address in dts"
  ARM: dts: imx6qdl: Fix SPDIF regression
  ARM: imx6: add missing BM_CLPCR_BYPASS_PMIC_READY setting for imx6sx
  ARM: dts: imx7d-sdb: fix ti,x-plate-ohms property name
  ARM: dts: kirkwood: Fix PCIe label on OpenRD
  ARM: kirkwood: ib62x0: fix size of u-boot environment partition
  bus: arm-ccn: make event groups reliable
  bus: arm-ccn: fix hrtimer registration
  bus: arm-ccn: fix PMU interrupt flags
  ARM: tegra: Correct polarity for Tegra114 PMIC interrupt
  MAINTAINERS: add tree entry for ARM/UniPhier architecture
  ARM: sun5i: Fix typo in trip point temperature
  MAINTAINERS: Switch to kernel.org account for Krzysztof Kozlowski
  ARM: imx6ul: populates platform device at .init_machine
  bus: arm-ccn: Add missing event attribute exclusions for host/guest
  bus: arm-ccn: Correct required arguments for XP PMU events
  bus: arm-ccn: Fix XP watchpoint settings bitmask
  bus: arm-ccn: Do not attempt to configure XPs for cycle counter
  bus: arm-ccn: Fix PMU handling of MN
  ...

When a seq-virmidi driver is initialized, it registers a rawmidi
instance with its callback to create an associated seq kernel client.
Currently it's done throughly in rawmidi's register_mutex context.
Recently it was found that this may lead to a deadlock another rawmidi
device that is being attached with the sequencer is accessed, as both
open with the same register_mutex.  This was actually triggered by
syzkaller, as Dmitry Vyukov reported:

======================================================
 [ INFO: possible circular locking dependency detected ]
 4.8.0-rc1+ #11 Not tainted
 -------------------------------------------------------
 syz-executor/7154 is trying to acquire lock:
  (register_mutex#5){+.+.+.}, at: [<ffffffff84fd6d4b>] snd_rawmidi_kernel_open+0x4b/0x260 sound/core/rawmidi.c:341

 but task is already holding lock:
  (&grp->list_mutex){++++.+}, at: [<ffffffff850138bb>] check_and_subscribe_port+0x5b/0x5c0 sound/core/seq/seq_ports.c:495

 which lock already depends on the new lock.

 the existing dependency chain (in reverse order) is:

 -> #1 (&grp->list_mutex){++++.+}:
    [<ffffffff8147a3a8>] lock_acquire+0x208/0x430 kernel/locking/lockdep.c:3746
    [<ffffffff863f6199>] down_read+0x49/0xc0 kernel/locking/rwsem.c:22
    [<     inline     >] deliver_to_subscribers sound/core/seq/seq_clientmgr.c:681
    [<ffffffff85005c5e>] snd_seq_deliver_event+0x35e/0x890 sound/core/seq/seq_clientmgr.c:822
    [<ffffffff85006e96>] > snd_seq_kernel_client_dispatch+0x126/0x170 sound/core/seq/seq_clientmgr.c:2418
    [<ffffffff85012c52>] snd_seq_system_broadcast+0xb2/0xf0 sound/core/seq/seq_system.c:101
    [<ffffffff84fff70a>] snd_seq_create_kernel_client+0x24a/0x330 sound/core/seq/seq_clientmgr.c:2297
    [<     inline     >] snd_virmidi_dev_attach_seq sound/core/seq/seq_virmidi.c:383
    [<ffffffff8502d29f>] snd_virmidi_dev_register+0x29f/0x750 sound/core/seq/seq_virmidi.c:450
    [<ffffffff84fd208c>] snd_rawmidi_dev_register+0x30c/0xd40 sound/core/rawmidi.c:1645
    [<ffffffff84f816d3>] __snd_device_register.part.0+0x63/0xc0 sound/core/device.c:164
    [<     inline     >] __snd_device_register sound/core/device.c:162
    [<ffffffff84f8235d>] snd_device_register_all+0xad/0x110 sound/core/device.c:212
    [<ffffffff84f7546f>] snd_card_register+0xef/0x6c0 sound/core/init.c:749
    [<ffffffff85040b7f>] snd_virmidi_probe+0x3ef/0x590 sound/drivers/virmidi.c:123
    [<ffffffff833ebf7b>] platform_drv_probe+0x8b/0x170 drivers/base/platform.c:564
    ......

 -> #0 (register_mutex#5){+.+.+.}:
    [<     inline     >] check_prev_add kernel/locking/lockdep.c:1829
    [<     inline     >] check_prevs_add kernel/locking/lockdep.c:1939
    [<     inline     >] validate_chain kernel/locking/lockdep.c:2266
    [<ffffffff814791f4>] __lock_acquire+0x4d44/0x4d80 kernel/locking/lockdep.c:3335
    [<ffffffff8147a3a8>] lock_acquire+0x208/0x430 kernel/locking/lockdep.c:3746
    [<     inline     >] __mutex_lock_common kernel/locking/mutex.c:521
    [<ffffffff863f0ef1>] mutex_lock_nested+0xb1/0xa20 kernel/locking/mutex.c:621
    [<ffffffff84fd6d4b>] snd_rawmidi_kernel_open+0x4b/0x260 sound/core/rawmidi.c:341
    [<ffffffff8502e7c7>] midisynth_subscribe+0xf7/0x350 sound/core/seq/seq_midi.c:188
    [<     inline     >] subscribe_port sound/core/seq/seq_ports.c:427
    [<ffffffff85013cc7>] check_and_subscribe_port+0x467/0x5c0 sound/core/seq/seq_ports.c:510
    [<ffffffff85015da9>] snd_seq_port_connect+0x2c9/0x500 sound/core/seq/seq_ports.c:579
    [<ffffffff850079b8>] snd_seq_ioctl_subscribe_port+0x1d8/0x2b0 sound/core/seq/seq_clientmgr.c:1480
    [<ffffffff84ffe9e4>] snd_seq_do_ioctl+0x184/0x1e0 sound/core/seq/seq_clientmgr.c:2225
    [<ffffffff84ffeae8>] snd_seq_kernel_client_ctl+0xa8/0x110 sound/core/seq/seq_clientmgr.c:2440
    [<ffffffff85027664>] snd_seq_oss_midi_open+0x3b4/0x610 sound/core/seq/oss/seq_oss_midi.c:375
    [<ffffffff85023d67>] snd_seq_oss_synth_setup_midi+0x107/0x4c0 sound/core/seq/oss/seq_oss_synth.c:281
    [<ffffffff8501b0a8>] snd_seq_oss_open+0x748/0x8d0 sound/core/seq/oss/seq_oss_init.c:274
    [<ffffffff85019d8a>] odev_open+0x6a/0x90 sound/core/seq/oss/seq_oss.c:138
    [<ffffffff84f7040f>] soundcore_open+0x30f/0x640 sound/sound_core.c:639
    ......

 other info that might help us debug this:

 Possible unsafe locking scenario:

        CPU0                    CPU1
        ----                    ----
   lock(&grp->list_mutex);
                                lock(register_mutex#5);
                                lock(&grp->list_mutex);
   lock(register_mutex#5);

 *** DEADLOCK ***
======================================================

The fix is to simply move the registration parts in
snd_rawmidi_dev_register() to the outside of the register_mutex lock.
The lock is needed only to manage the linked list, and it's not
necessarily to cover the whole initialization process.
Reported-by: NDmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

When a user timer instance is continued without the explicit start
beforehand, the system gets eventually zero-division error like:

  divide error: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN
  CPU: 1 PID: 27320 Comm: syz-executor Not tainted 4.8.0-rc3-next-20160825+ #8
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
   task: ffff88003c9b2280 task.stack: ffff880027280000
   RIP: 0010:[<ffffffff858e1a6c>]  [<     inline     >] ktime_divns include/linux/ktime.h:195
   RIP: 0010:[<ffffffff858e1a6c>]  [<ffffffff858e1a6c>] snd_hrtimer_callback+0x1bc/0x3c0 sound/core/hrtimer.c:62
  Call Trace:
   <IRQ>
   [<     inline     >] __run_hrtimer kernel/time/hrtimer.c:1238
   [<ffffffff81504335>] __hrtimer_run_queues+0x325/0xe70 kernel/time/hrtimer.c:1302
   [<ffffffff81506ceb>] hrtimer_interrupt+0x18b/0x420 kernel/time/hrtimer.c:1336
   [<ffffffff8126d8df>] local_apic_timer_interrupt+0x6f/0xe0 arch/x86/kernel/apic/apic.c:933
   [<ffffffff86e13056>] smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:957
   [<ffffffff86e1210c>] apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:487
   <EOI>
   .....

Although a similar issue was spotted and a fix patch was merged in
commit [6b760bb2: ALSA: timer: fix division by zero after
SNDRV_TIMER_IOCTL_CONTINUE], it seems covering only a part of
iceberg.

In this patch, we fix the issue a bit more drastically.  Basically the
continue of an uninitialized timer is supposed to be a fresh start, so
we do it for user timers.  For the direct snd_timer_continue() call,
there is no way to pass the initial tick value, so we kick out for the
uninitialized case.
Reported-by: NDmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

dmi_dev is freed in error exit code but, according to the document
of device_register, it should never directly free device structure
after calling this function, even if it returned an error! Use
put_device() instead.
Signed-off-by: NAllen Hung <allen_hung@dell.com>
Signed-off-by: NJean Delvare <jdelvare@suse.de>

Pull thermal fix from Zhang Rui:
 "Only one patch this time, which fixes a crash in rcar_thermal driver.
  From Dirk Behme"

* 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
  thermal: rcar_thermal: Fix priv->zone error handling

Merge tag 'sunxi-fixes-for-4.8' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into fixes

Allwinner fixes for 4.8

A single patch fixing a typo in the temperature trip points in the A13
DTSI.

* tag 'sunxi-fixes-for-4.8' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
  ARM: sun5i: Fix typo in trip point temperature
Signed-off-by: NOlof Johansson <olof@lixom.net>

For one of the CCI events exposed under sysfs, "snoop" was typo'd as
"snopp". Correct this such that users see the expected event name when
enumerating events via sysfs.

Cc: arm@kernel.org
Acked-by: NMark Rutland <mark.rutland@arm.com>
Signed-off-by: NSuzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Merge tag 'imx-fixes-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into fixes

i.MX fixes for 4.8, 2nd round:
 - Fix misspelled "ti,x-plate-ohms" property name of touchscreen
   controller for imx7d-sdb DTS.
 - Add missing BM_CLPCR_BYPASS_PMIC_READY setting for i.MX6SX to get
   suspend/resume work properly.
 - Fix SPDIF regression on imx6qdl which caused by a clock update on
   spdif device node.

* tag 'imx-fixes-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  ARM: dts: imx6qdl: Fix SPDIF regression
  ARM: imx6: add missing BM_CLPCR_BYPASS_PMIC_READY setting for imx6sx
  ARM: dts: imx7d-sdb: fix ti,x-plate-ohms property name
Signed-off-by: NOlof Johansson <olof@lixom.net>

This reverts commit b5c86b74.

This is no longer needed due to other changes going into 4.8 to rename
the unit addresses on a large number of device nodes. So it was picked up
for v4.8-rc1 in error.
Reported-by: NRalf Ramsauer <ralf@ramses-pyramidenbau.de>
Signed-off-by: NOlof Johansson <olof@lixom.net>

In commit c60ac569 ("powerpc: Update kernel VSID range", 2013-03-13)
we lost a check on the region number (the top four bits of the effective
address) for addresses below PAGE_OFFSET.  That commit replaced a check
that the top 18 bits were all zero with a check that bits 46 - 59 were
zero (performed for all addresses, not just user addresses).

This means that userspace can access an address like 0x1000_0xxx_xxxx_xxxx
and we will insert a valid SLB entry for it.  The VSID used will be the
same as if the top 4 bits were 0, but the page size will be some random
value obtained by indexing beyond the end of the mm_ctx_high_slices_psize
array in the paca.  If that page size is the same as would be used for
region 0, then userspace just has an alias of the region 0 space.  If the
page size is different, then no HPTE will be found for the access, and
the process will get a SIGSEGV (since hash_page_mm() will refuse to create
a HPTE for the bogus address).

The access beyond the end of the mm_ctx_high_slices_psize can be at most
5.5MB past the array, and so will be in RAM somewhere.  Since the access
is a load performed in real mode, it won't fault or crash the kernel.
At most this bug could perhaps leak a little bit of information about
blocks of 32 bytes of memory located at offsets of i * 512kB past the
paca->mm_ctx_high_slices_psize array, for 1 <= i <= 11.

Fixes: c60ac569 ("powerpc: Update kernel VSID range")
Cc: stable@vger.kernel.org # v3.9+
Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
Reviewed-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

Commit 7aef4136 ("powerpc32: rewrite csum_partial_copy_generic()
based on copy_tofrom_user()") introduced a bug when destination address
is odd and len is lower than cacheline size.

In that case the resulting csum value doesn't have to be rotated one
byte because the cache-aligned copy part is skipped so no alignment
is performed.

Fixes: 7aef4136 ("powerpc32: rewrite csum_partial_copy_generic() based on copy_tofrom_user()")
Cc: stable@vger.kernel.org # v4.6+
Reported-by: NAlessio Igor Bogani <alessio.bogani@elettra.eu>
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
Tested-by: NAlessio Igor Bogani <alessio.bogani@elettra.eu>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

In pnv_ioda_free_pe(), the PE object (including the associated PE
number) is cleared before resetting the corresponding bit in the
PE allocation bitmap. It means PE#0 is always released to the bitmap
wrongly.

This fixes above issue by caching the PE number before the PE object
is cleared.

Fixes: 1e916772 ("powerpc/powernv: Use PE instead of number during setup and release"
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: NGavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

ucb1x00 has used IRQ probing since it's dawn to find the GPIO interrupt
that it's connected to.  However, commit 23393d49 ("gpio: kill off
set_irq_flags usage") broke this by disabling IRQ probing on GPIO
interrupts.  Fix this.

Fixes: 23393d49 ("gpio: kill off set_irq_flags usage")
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The MCP23S08 driver certainly accesses fields inside the
struct gpio_chip that are only available under CONFIG_OF_GPIO
not just CONFIG_OF, so update the Kconfig and driver to reflect
this.

Cc: Alexander Stein <alexander.stein@systec-electronic.com>
Cc: Phil Reid <preid@electromag.com.au>
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This reverts commit 7d4defe2.

The commit was pointless, manically trembling in the dark for
a solution. The real fixes are:

commit 048c28c9
("gpio: make any OF dependent driver depend on OF_GPIO")
commit 2527ecc9
("gpio: Fix OF build problem on UM")
Reported-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Pull more hardened usercopyfixes from Kees Cook:

 - force check_object_size() to be inline too

 - move page-spanning check behind a CONFIG since it's triggering false
   positives

[ Changed the page-spanning config option to depend on EXPERT in the
  merge.  That way it still gets build testing, and you can enable it if
  you want to, but is never enabled for "normal" configurations ]

* tag 'usercopy-v4.8-rc6-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  usercopy: remove page-spanning test for now
  usercopy: force check_object_size() inline

Merge branch 'for-chris' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.8

A custom allocator without __GFP_COMP that copies to userspace has been
found in vmw_execbuf_process[1], so this disables the page-span checker
by placing it behind a CONFIG for future work where such things can be
tracked down later.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1373326Reported-by: NVinson Lee <vlee@freedesktop.org>
Fixes: f5509cc1 ("mm: Hardened usercopy")
Signed-off-by: NKees Cook <keescook@chromium.org>

Just for good measure, make sure that check_object_size() is always
inlined too, as already done for copy_*_user() and __copy_*_user().
Suggested-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NKees Cook <keescook@chromium.org>

Pull seccomp fixes from Kees Cook:
 "Fix UM seccomp vs ptrace, after reordering landed"

* tag 'seccomp-v4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  seccomp: Remove 2-phase API documentation
  um/ptrace: Fix the syscall number update after a ptrace
  um/ptrace: Fix the syscall_trace_leave call

Pull hardened usercopy fixes from Kees Cook:

 - inline copy_*_user() for correct use of __builtin_const_p() for
   hardened usercopy and the recent compile-time checks.

 - switch hardened usercopy to only check non-const size arguments to
   avoid meaningless checks on likely-sane const values.

 - update lkdtm usercopy tests to compenstate for the const checking.

* tag 'usercopy-v4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  lkdtm: adjust usercopy tests to bypass const checks
  usercopy: fold builtin_const check into inline function
  x86/uaccess: force copy_*_user() to be inlined

Fixes: 8112c4f1 ("seccomp: remove 2-phase API")
Signed-off-by: NMickaël Salaün <mic@digikod.net>
Acked-by: NKees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: NJames Morris <james.l.morris@oracle.com>
Signed-off-by: NKees Cook <keescook@chromium.org>

Update the syscall number after each PTRACE_SETREGS on ORIG_*AX.

This is needed to get the potentially altered syscall number in the
seccomp filters after RET_TRACE.

This fix four seccomp_bpf tests:
> [ RUN      ] TRACE_syscall.skip_after_RET_TRACE
> seccomp_bpf.c:1560:TRACE_syscall.skip_after_RET_TRACE:Expected -1 (18446744073709551615) == syscall(39) (26)
> seccomp_bpf.c:1561:TRACE_syscall.skip_after_RET_TRACE:Expected 1 (1) == (*__errno_location ()) (22)
> [     FAIL ] TRACE_syscall.skip_after_RET_TRACE
> [ RUN      ] TRACE_syscall.kill_after_RET_TRACE
> TRACE_syscall.kill_after_RET_TRACE: Test exited normally instead of by signal (code: 1)
> [     FAIL ] TRACE_syscall.kill_after_RET_TRACE
> [ RUN      ] TRACE_syscall.skip_after_ptrace
> seccomp_bpf.c:1622:TRACE_syscall.skip_after_ptrace:Expected -1 (18446744073709551615) == syscall(39) (26)
> seccomp_bpf.c:1623:TRACE_syscall.skip_after_ptrace:Expected 1 (1) == (*__errno_location ()) (22)
> [     FAIL ] TRACE_syscall.skip_after_ptrace
> [ RUN      ] TRACE_syscall.kill_after_ptrace
> TRACE_syscall.kill_after_ptrace: Test exited normally instead of by signal (code: 1)
> [     FAIL ] TRACE_syscall.kill_after_ptrace

Fixes: 26703c63 ("um/ptrace: run seccomp after ptrace")
Signed-off-by: NMickaël Salaün <mic@digikod.net>
Acked-by: NKees Cook <keescook@chromium.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: James Morris <jmorris@namei.org>
Cc: user-mode-linux-devel@lists.sourceforge.net
Signed-off-by: NJames Morris <james.l.morris@oracle.com>
Signed-off-by: NKees Cook <keescook@chromium.org>

Keep the same semantic as before the commit 26703c63: deallocate
audit context and fake a proper syscall exit.

This fix a kernel panic triggered by the seccomp_bpf test:
> [ RUN      ] global.ERRNO_valid
> BUG: failure at kernel/auditsc.c:1504/__audit_syscall_entry()!
> Kernel panic - not syncing: BUG!

Fixes: 26703c63 ("um/ptrace: run seccomp after ptrace")
Signed-off-by: NMickaël Salaün <mic@digikod.net>
Acked-by: NKees Cook <keescook@chromium.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: James Morris <jmorris@namei.org>
Cc: user-mode-linux-devel@lists.sourceforge.net
Signed-off-by: NJames Morris <james.l.morris@oracle.com>
Signed-off-by: NKees Cook <keescook@chromium.org>

Pull rdma fixes from Doug Ledford:
 "This is the second pull request for the rdma subsystem.  Most of the
  patches are small and obvious.  I took two patches in that are larger
  than I wanted this late in the cycle.

  The first is the hfi1 patch that implements a work queue to test the
  QSFP read state.  I originally rejected the first patch for this
  (which would have place up to 20 seconds worth of udelays in their
  probe routine).  They then rewrote it the way I wanted (use delayed
  work tasks to wait asynchronously up to 20 seconds for the QSFP to
  come alive), so I can't really complain about the size of getting what
  I asked for :-/.

  The second is large because it switches the rcu locking in the debugfs
  code.  Since a locking change like this is done all at once, the size
  it what it is.  It resolves a litany of debug messages from the
  kernel, so I pulled it in for -rc.

  The rest are all typical -rc worthy patches I think.

  There will still be a third -rc pull request from the rdma subsystem
  this release.  I hope to have that one ready to go by the end of this
  week or early next.

  Summary:

   - a smattering of small fixes across the core, ipoib, i40iw, isert,
     cxgb4, and mlx4

   - a slightly larger group of fixes to each of mlx5 and hfi1"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
  IB/hfi1: Rework debugfs to use SRCU
  IB/hfi1: Make n_krcvqs be an unsigned long integer
  IB/hfi1: Add QSFP sanity pre-check
  IB/hfi1: Fix AHG KDETH Intr shift
  IB/hfi1: Fix SGE length for misaligned PIO copy
  IB/mlx5: Don't return errors from poll_cq
  IB/mlx5: Use TIR number based on selector
  IB/mlx5: Simplify code by removing return variable
  IB/mlx5: Return EINVAL when caller specifies too many SGEs
  IB/mlx4: Don't return errors from poll_cq
  Revert "IB/mlx4: Return EAGAIN for any error in mlx4_ib_poll_one"
  IB/ipoib: Fix memory corruption in ipoib cm mode connect flow
  IB/core: Fix use after free in send_leave function
  IB/cxgb4: Make _free_qp static to silence build warning
  IB/isert: Properly release resources on DEVICE_REMOVAL
  IB/hfi1: Fix the size parameter to find_first_bit
  IB/mlx5: Fix the size parameter to find_first_bit
  IB/hfi1: Clean up type used and casting
  i40iw: Receive notification events correctly
  i40iw: Update hw_iwarp_state

The hardened usercopy is now consistently avoiding checks against const
sizes, since we really only want to perform runtime bounds checking
on lengths that weren't known at build time. To test the hardened usercopy
code, we must force the length arguments to be seen as non-const.
Signed-off-by: NKees Cook <keescook@chromium.org>

Instead of having each caller of check_object_size() need to remember to
check for a const size parameter, move the check into check_object_size()
itself. This actually matches the original implementation in PaX, though
this commit cleans up the now-redundant builtin_const() calls in the
various architectures.
Signed-off-by: NKees Cook <keescook@chromium.org>

As already done with __copy_*_user(), mark copy_*_user() as __always_inline.
Without this, the checks for things like __builtin_const_p() won't work
consistently in either hardened usercopy nor the recent adjustments for
detecting usercopy overflows at compile time.

The change in kernel text size is detectable, but very small:

 text      data     bss     dec      hex     filename
12118735  5768608 14229504 32116847 1ea106f vmlinux.before
12120207  5768608 14229504 32118319 1ea162f vmlinux.after
Signed-off-by: NKees Cook <keescook@chromium.org>