Pull block layer fixes from Jens Axboe:
 "A final set of fixes for 4.3.

  It is (again) bigger than I would have liked, but it's all been
  through the testing mill and has been carefully reviewed by multiple
  parties.  Each fix is either a regression fix for this cycle, or is
  marked stable.  You can scold me at KS.  The pull request contains:

   - Three simple fixes for NVMe, fixing regressions since 4.3.  From
     Arnd, Christoph, and Keith.

   - A single xen-blkfront fix from Cathy, fixing a NULL dereference if
     an error is returned through the staste change callback.

   - Fixup for some bad/sloppy code in nbd that got introduced earlier
     in this cycle.  From Markus Pargmann.

   - A blk-mq tagset use-after-free fix from Junichi.

   - A backing device lifetime fix from Tejun, fixing a crash.

   - And finally, a set of regression/stable fixes for cgroup writeback
     from Tejun"

* 'for-linus' of git://git.kernel.dk/linux-block:
  writeback: remove broken rbtree_postorder_for_each_entry_safe() usage in cgwb_bdi_destroy()
  NVMe: Fix memory leak on retried commands
  block: don't release bdi while request_queue has live references
  nvme: use an integer value to Linux errno values
  blk-mq: fix use-after-free in blk_mq_free_tag_set()
  nvme: fix 32-bit build warning
  writeback: fix incorrect calculation of available memory for memcg domains
  writeback: memcg dirty_throttle_control should be initialized with wb->memcg_completions
  writeback: bdi_writeback iteration must not skip dying ones
  writeback: fix bdi_writeback iteration in wakeup_dirtytime_writeback()
  writeback: laptop_mode_timer_fn() needs rcu_read_lock() around bdi_writeback iteration
  nbd: Add locking for tasks
  xen-blkfront: check for null drvdata in blkback_changed (XenbusStateClosing)

Pull x86 fixes from Ingo Molnar:
 "Misc fixes: two KASAN fixes, two EFI boot fixes, two boot-delay
  optimization fixes, and a fix for a IRQ handling hang observed on
  virtual platforms"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm, kasan: Silence KASAN warnings in get_wchan()
  compiler, atomics, kasan: Provide READ_ONCE_NOCHECK()
  x86, kasan: Fix build failure on KASAN=y && KMEMCHECK=y kernels
  x86/smpboot: Fix CPU #1 boot timeout
  x86/smpboot: Fix cpu_init_udelay=10000 corner case boot parameter misbehavior
  x86/ioapic: Disable interrupts when re-routing legacy IRQs
  x86/setup: Extend low identity map to cover whole kernel range
  x86/efi: Fix multiple GOP device support

Merge fixes from Andrew Morton:
 "9 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  ocfs2/dlm: unlock lockres spinlock before dlm_lockres_put
  fault-inject: fix inverted interval/probability values in printk
  lib/Kconfig.debug: disable -Wframe-larger-than warnings with KASAN=y
  mm: make sendfile(2) killable
  thp: use is_zero_pfn() only after pte_present() check
  mailmap: update Javier Martinez Canillas' email
  MAINTAINERS: add Sergey as zsmalloc reviewer
  mm: cma: fix incorrect type conversion for size during dma allocation
  kmod: don't run async usermode helper as a child of kworker thread

Pull sound fixes from Takashi Iwai:
 "There is nothing to worry you much, only a few small & stable patches
  are found for usual stuff, HD-audio (a Lenovo laptop quirk, a fix for
  minor error handling) and ASoC (trivial fixes for RT298 and WM
  codecs).

  The only remaining major change is the fix for ASoC SX_TLV control
  that was overseen during refactoring, but the fix itself is trivial
  and safe"

* tag 'sound-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ASoC: wm8962: mark cache_dirty flag after software reset in pm_resume
  ASoC: rt298: fix wrong setting of gpio2_en
  ASoC: wm8904: Correct number of EQ registers
  ALSA: hda - Fix deadlock at error in building PCM
  ASoC: Add info callback for SX_TLV controls
  ASoC: rt298: correct index default value
  ALSA: hda - Fix inverted internal mic on Lenovo G50-80
  ALSA: hdac: Explicitly add io.h

This was found during userspace fuzzing test when a large size dma cma
allocation is made by driver(like ion) through userspace.

  show_stack+0x10/0x1c
  dump_stack+0x74/0xc8
  kasan_report_error+0x2b0/0x408
  kasan_report+0x34/0x40
  __asan_storeN+0x15c/0x168
  memset+0x20/0x44
  __dma_alloc_coherent+0x114/0x18c

Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

There are 24 EQ registers not 25, I suspect this bug came about because
the registers start at EQ1 not zero. The bug is relatively harmless as
the extra register written is an unused one.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

Some code may perform racy by design memory reads. This could be
harmless, yet such code may produce KASAN warnings.

To hide such accesses from KASAN this patch introduces
READ_ONCE_NOCHECK() macro. KASAN will not check the memory
accessed by READ_ONCE_NOCHECK(). The KernelThreadSanitizer
(KTSAN) is going to ignore it as well.

This patch creates __read_once_size_nocheck() a clone of
__read_once_size(). The only difference between them is
'no_sanitized_address' attribute appended to '*_nocheck'
function. This attribute tells the compiler that instrumentation
of memory accesses should not be applied to that function. We
declare it as static '__maybe_unsed' because GCC is not capable
to inline such function:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368

With KASAN=n READ_ONCE_NOCHECK() is just a clone of READ_ONCE().

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Kostya Serebryany <kcc@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>
Cc: kasan-dev <kasan-dev@googlegroups.com>
Link: http://lkml.kernel.org/r/1445243838-17763-2-git-send-email-aryabinin@virtuozzo.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

Pull networking fixes from David Miller:

 1) Account for extra headroom in ath9k driver, from Felix Fietkau.

 2) Fix OOPS in pppoe driver due to incorrect socket state transition,
    from Guillaume Nault.

 3) Kill memory leak in amd-xgbe debugfx, from Geliang Tang.

 4) Power management fixes for iwlwifi, from Johannes Berg.

 5) Fix races in reqsk_queue_unlink(), from Eric Dumazet.

 6) Fix dst_entry usage in ARP replies, from Jiri Benc.

 7) Cure OOPSes with SO_GET_FILTER, from Daniel Borkmann.

 8) Missing allocation failure check in amd-xgbe, from Tom Lendacky.

 9) Various resource allocation/freeing cures in DSA< from Neil
    Armstrong.

10) A series of bug fixes in the openvswitch conntrack support, from
    Joe Stringer.

11) Fix two cases (BPF and act_mirred) where we have to clean the sender
    cpu stored in the SKB before transmitting.  From WANG Cong and
    Alexei Starovoitov.

12) Disable VLAN filtering in promiscuous mode in mlx5 driver, from
    Achiad Shochat.

13) Older bnx2x chips cannot do 4-tuple UDP hashing, so prevent this
    configuration via ethtool.  From Yuval Mintz.

14) Don't call rt6_uncached_list_flush_dev() from rt6_ifdown() when
    'dev' is NULL, from Eric Biederman.

15) Prevent stalled link synchronization in tipc, from Jon Paul Maloy.

16) kcalloc() gstrings ethtool buffer before having driver fill it in,
    in order to prevent kernel memory leaking.  From Joe Perches.

17) Fix mixxing rt6_info initialization for blackhole routes, from
    Martin KaFai Lau.

18) Kill VLAN regression in via-rhine, from Andrej Ota.

19) Missing pfmemalloc check in sk_add_backlog(), from Eric Dumazet.

20) Fix spurious MSG_TRUNC signalling in netlink dumps, from Ronen Arad.

21) Scrube SKBs when pushing them between namespaces in openvswitch,
    from Joe Stringer.

22) bcmgenet enables link interrupts too early, fix from Florian
    Fainelli.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (92 commits)
  net: bcmgenet: Fix early link interrupt enabling
  tunnels: Don't require remote endpoint or ID during creation.
  openvswitch: Scrub skb between namespaces
  xen-netback: correctly check failed allocation
  net: asix: add support for the Billionton GUSB2AM-1G-B USB adapter
  netlink: Trim skb to alloc size to avoid MSG_TRUNC
  net: add pfmemalloc check in sk_add_backlog()
  via-rhine: fix VLAN receive handling regression.
  ipv6: Initialize rt6_info properly in ip6_blackhole_route()
  ipv6: Move common init code for rt6_info to a new function rt6_info_init()
  Bluetooth: Fix initializing conn_params in scan phase
  Bluetooth: Fix conn_params list update in hci_connect_le_scan_cleanup
  Bluetooth: Fix remove_device behavior for explicit connects
  Bluetooth: Fix LE reconnection logic
  Bluetooth: Fix reference counting for LE-scan based connections
  Bluetooth: Fix double scan updates
  mlxsw: core: Fix race condition in __mlxsw_emad_transmit
  tipc: move fragment importance field to new header position
  ethtool: Use kcalloc instead of kmalloc for ethtool_get_strings
  tipc: eliminate risk of stalled link synchronization
  ...

Greg reported crashes hitting the following check in __sk_backlog_rcv()

	BUG_ON(!sock_flag(sk, SOCK_MEMALLOC));

The pfmemalloc bit is currently checked in sk_filter().

This works correctly for TCP, because sk_filter() is ran in
tcp_v[46]_rcv() before hitting the prequeue or backlog checks.

For UDP or other protocols, this does not work, because the sk_filter()
is ran from sock_queue_rcv_skb(), which might be called _after_ backlog
queuing if socket is owned by user by the time packet is processed by
softirq handler.

Fixes: b4b9e35585089 ("netvm: set PF_MEMALLOC as appropriate during SKB processing")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Greg Thelen <gthelen@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>