Pull MMC fixes from Ulf Hansson:
 "Here are a couple of mmc fixes intended for v4.11 rc5.

  MMC host:
   - sdhci: Fix bug when using SDIO IRQ
   - sdhci-of-at91: Fix eMMC DDR52 card detection"

* tag 'mmc-v4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: sdhci-of-at91: fix MMC_DDR_52 timing selection
  mmc: sdhci: Disable runtime pm when the sdio_irq is enabled

Pull sound fixes from Takashi Iwai:
 "At this time, most of changes are for ASoC, while we got one fix for
  yet another race of ALSA sequencer core and a usual HD-audio quirk.

  The ASoC changes are mostly small and device-specific fixes. A
  slightly large volume is seen in sun8i-codec, which is a new code in
  4.11, and we'd like to fix user-visible stuff before the official 4.1
  release"

* tag 'sound-4.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (27 commits)
  ALSA: hda - fix a problem for lineout on a Dell AIO machine
  ASoC: simple-card: fix simple_dai clk lookup
  ASoC: STI: Fix reader substream pointer set
  ALSA: seq: Fix race during FIFO resize
  ARM: dts: sun8i: Update audio-routing with renamed widgets
  ASoC: sun8i-codec: Convert to use SND_SOC_DAPM_AIF_IN
  ASoC: sun8i-codec: Fix space on audio-routing widget
  ASoC: sun8i-codec: Update mixer to use SOC_DAPM_DOUBLE
  ASoC: sun8i-codec: Remove analog "HP" widget
  ASoC: rt5665: fix wrong shift rt5665_if2_1_adc_in_enum
  ASoC: rt5665: fix define of RT5665_HP_DRIVER_5X
  ASoC: rcar: dma: remove unnecessary "volatile"
  ASoC: rcar: clear DE bit only in PDMACHCR when it stops
  ASoC: rsnd: fix sound route path when using SRC6/SRC9
  ASoC: don't dereference NULL pcm_{new,free}
  ASoC: rt5665: CLKDET is also a power of ASRC
  ASoC: rt5665: Vref3 is necessary for Mono Amp
  ASoC: rt5665: increase LDO level
  ASoC: rt5665: fix getting wrong work handler container
  ASoC: atmel-classd: fix audio clock rate
  ...

Pull HID fixes from Jiri Kosina:

 - Wacom regression fixes, from Aaron Armstrong Skomra

 - new device ID addition by Peter Stein

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
  HID: wacom: call _query_tablet_data() for BAMBOO_TOUCH
  HID: wacom: Don't add ghost interface as shared data
  HID: xinmo: fix for out of range for THT 2P arcade controller.

Pull drm fixes from Dave Airlie:
 "Seems to be quietening down, which means someone will make a liar of
  me for rc6.

  Just one vc4, one etnvaiv, one radeon, and a few i915 GVT fixes, and
  one i915 normal fixes"

* tag 'drm-fixes-for-v4.11-rc5' of git://people.freedesktop.org/~airlied/linux:
  drm/vc4: Allocate the right amount of space for boot-time CRTC state.
  drm/etnaviv: (re-)protect fence allocation with GPU mutex
  drm/radeon: Override fpfn for all VRAM placements in radeon_evict_flags
  drm/i915: Restore marking context objects as dirty on pinning
  drm/i915/gvt: Use force single submit flag to distinguish gvt request from i915 request
  drm/i915/gvt: set shadow entry to scratch page while p2m failed
  drm/i915/gvt: Fix guest fail to read EDID leading to black guest console issue.
  drm/i915/gvt: fix wrong offset when loading RCS mocs
  drm/i915/gvt: add write handler for mmio mbctl
  drm/i915/kvmgt: Hold struct kvm reference

On this Dell AIO machine, the lineout jack does not work.

We found the pin 0x1a is assigned to lineout on this machine, and in
the past, we applied ALC298_FIXUP_DELL1_MIC_NO_PRESENCE to fix the
heaset-set mic problem for this machine, this fixup will redefine
the pin 0x1a to headphone-mic, as a result the lineout doesn't
work anymore.

After consulting with Dell, they told us this machine doesn't support
microphone via headset jack, so we add a new fixup which only defines
the pin 0x18 as the headset-mic.

[rearranged the fixup insertion position by tiwai in order to make the
 merge with other branches easier -- tiwai]

Fixes: 59ec4b57 ("ALSA: hda - Fix headset mic detection problem for two dell machines")
Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Just one vc4 fix from Eric, cc: stable

* tag 'drm-misc-fixes-2017-03-31' of git://anongit.freedesktop.org/git/drm-misc:
  drm/vc4: Allocate the right amount of space for boot-time CRTC state.

Merge tag 'drm-intel-fixes-2017-03-29' of git://anongit.freedesktop.org/git/drm-intel into drm-fixes

drm/i915 fixes for v4.11-rc5

* tag 'drm-intel-fixes-2017-03-29' of git://anongit.freedesktop.org/git/drm-intel:
  drm/i915: Restore marking context objects as dirty on pinning
  drm/i915/gvt: Use force single submit flag to distinguish gvt request from i915 request
  drm/i915/gvt: set shadow entry to scratch page while p2m failed
  drm/i915/gvt: Fix guest fail to read EDID leading to black guest console issue.
  drm/i915/gvt: fix wrong offset when loading RCS mocs
  drm/i915/gvt: add write handler for mmio mbctl
  drm/i915/kvmgt: Hold struct kvm reference

 One small fix for radeon.

* 'drm-fixes-4.11' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: Override fpfn for all VRAM placements in radeon_evict_flags

a single fix to keep fence seqnos of completed jobs monotonically
increasing, as expected in various locations of the driver code. Also
tagged for stable.

* 'etnaviv/fixes' of https://git.pengutronix.de/git/lst/linux:
  drm/etnaviv: (re-)protect fence allocation with GPU mutex

Pull PCI fixes from Bjorn Helgaas:

 - fix iProc memory corruption

 - fix ThunderX usage of unregistered PNP/ACPI ID

 - fix ThunderX resource reservation on early firmware

* tag 'pci-v4.11-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: thunder-pem: Add legacy firmware support for Cavium ThunderX host controller
  PCI: thunder-pem: Use Cavium assigned hardware ID for ThunderX host controller
  PCI: iproc: Save host bridge window resource in struct iproc_pcie

The controller has different timings for MMC_TIMING_UHS_DDR50 and
MMC_TIMING_MMC_DDR52. Configuring the controller with SDHCI_CTRL_UHS_DDR50,
when MMC_TIMING_MMC_DDR52 timings are requested, is not correct and can
lead to unexpected behavior.
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Fixes: bb5f8ea4 ("mmc: sdhci-of-at91: introduce driver for the Atmel SDMMC")
Cc: <stable@vger.kernel.org> # 4.4+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

SDIO cards may need clock to send the card interrupt to the host.

On a cherrytrail tablet with a RTL8723BS wifi chip, without this patch
pinging the tablet results in:

PING 192.168.1.14 (192.168.1.14) 56(84) bytes of data.
64 bytes from 192.168.1.14: icmp_seq=1 ttl=64 time=78.6 ms
64 bytes from 192.168.1.14: icmp_seq=2 ttl=64 time=1760 ms
64 bytes from 192.168.1.14: icmp_seq=3 ttl=64 time=753 ms
64 bytes from 192.168.1.14: icmp_seq=4 ttl=64 time=3.88 ms
64 bytes from 192.168.1.14: icmp_seq=5 ttl=64 time=795 ms
64 bytes from 192.168.1.14: icmp_seq=6 ttl=64 time=1841 ms
64 bytes from 192.168.1.14: icmp_seq=7 ttl=64 time=810 ms
64 bytes from 192.168.1.14: icmp_seq=8 ttl=64 time=1860 ms
64 bytes from 192.168.1.14: icmp_seq=9 ttl=64 time=812 ms
64 bytes from 192.168.1.14: icmp_seq=10 ttl=64 time=48.6 ms

Where as with this patch I get:

PING 192.168.1.14 (192.168.1.14) 56(84) bytes of data.
64 bytes from 192.168.1.14: icmp_seq=1 ttl=64 time=3.96 ms
64 bytes from 192.168.1.14: icmp_seq=2 ttl=64 time=1.97 ms
64 bytes from 192.168.1.14: icmp_seq=3 ttl=64 time=17.2 ms
64 bytes from 192.168.1.14: icmp_seq=4 ttl=64 time=2.46 ms
64 bytes from 192.168.1.14: icmp_seq=5 ttl=64 time=2.83 ms
64 bytes from 192.168.1.14: icmp_seq=6 ttl=64 time=1.40 ms
64 bytes from 192.168.1.14: icmp_seq=7 ttl=64 time=2.10 ms
64 bytes from 192.168.1.14: icmp_seq=8 ttl=64 time=1.40 ms
64 bytes from 192.168.1.14: icmp_seq=9 ttl=64 time=2.04 ms
64 bytes from 192.168.1.14: icmp_seq=10 ttl=64 time=1.40 ms

Cc: Dong Aisheng <b29396@freescale.com>
Cc: Ian W MORRISON <ianwmorrison@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Dong Aisheng <aisheng.dong@nxp.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Merge tag 'asoc-fix-v4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v4.11

A relatively large pile of fixes for mainline, the first since the merge
window.  The biggest block of changes here by volume is the sun8i-codec
set, the driver was newly added in the merge window but it was realized
that renaming some of the user visible controls was required so these
are being pushed for v4.11 to avoid the original code appearing in a
release.  Otherwise it's all fairly standard bugfix stuff.

Without this, the first modeset would dereference past the allocation
when trying to free the mm node.
Signed-off-by: Eric Anholt <eric@anholt.net>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170328201343.4884-1-eric@anholt.net
Fixes: d8dbf44f ("drm/vc4: Make the CRTCs cooperate on allocating display lists.")
Cc: <stable@vger.kernel.org> # v4.6+
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Commit a544c619 ("HID: wacom: do not attempt to switch mode
while in probe") introduces delayed work for querying (setting the
mode) on all tablets. Bamboo Touch (056a:00d0) has a ghost
interface which claims to be a pen device. Though this device can
be removed, we have to set the mode on the ghost pen interface
before we remove it. After the aforementioned delay was introduced
the device was being removed before the mode setting could be
executed.
Signed-off-by: Aaron Armstrong Skomra <aaron.skomra@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

A previous commit (below) adds a check for already probed interfaces to
Wacom's matching heuristic. Unfortunately this causes the Bamboo Pen
(CTL-460) to match itself to its 'ghost' touch interface. After
subsequent changes to the driver this match to the ghost causes the
kernel to crash. This patch avoids calling wacom_add_shared_data()
for the BAMBOO_PEN's ghost touch interface.

Fixes: 41372d5d ("HID: wacom: Augment 'oVid' and 'oPid' with heuristics for HID_GENERIC")
Cc: stable <stable@vger.kernel.org>     # 4.9
Signed-off-by: Aaron Armstrong Skomra <aaron.skomra@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

Pull thermal management fixes from Zhang Rui:

 - Fix a potential deadlock in cpu_cooling driver, which was introduced
   in 4.11-rc1. (Matthew Wilcox)

 - Fix the cpu_cooling and devfreq_cooling code to handle possible error
   return value from OPP calls, together with three minor fixes in the
   same patch series. (Viresh Kumar)

* 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
  thermal: cpu_cooling: Check OPP for errors
  thermal: cpu_cooling: Replace dev_warn with dev_err
  thermal: devfreq: Check OPP for errors
  thermal: devfreq_cooling: Replace dev_warn with dev_err
  thermal: devfreq: Simplify expression
  thermal: Fix potential deadlock in cpu_cooling

Pull block fixes from Jens Axboe:
 "Five fixes for this series:

   - a fix from me to ensure that blk-mq drivers that terminate IO in
     their ->queue_rq() handler by returning QUEUE_ERROR don't stall
     with a scheduler enabled.

   - four nbd fixes from Josef and Ratna, fixing various problems that
     are critical enough to go in for this cycle. They have been well
     tested"

* 'for-linus' of git://git.kernel.dk/linux-block:
  nbd: replace kill_bdev() with __invalidate_device()
  nbd: set queue timeout properly
  nbd: set rq->errors to actual error code
  nbd: handle ERESTARTSYS properly
  blk-mq: include errors in did_work calculation

Merge xfrm_user validation fixes from Andy Whitcroft:
 "Two patches we are applying to Ubuntu for XFRM_MSG_NEWAE validation
  issue reported by ZDI.

  The first of these is the primary fix, and the second is for a more
  theoretical issue that Kees pointed out when reviewing the first"

* emailed patches from Andy Whitcroft <apw@canonical.com>:
  xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder
  xfrm_user: validate XFRM_MSG_NEWAE XFRMA_REPLAY_ESN_VAL replay_window

Merge PTRACE_SETREGSET leakage fixes from Dave Martin:
 "This series is the collection of fixes I proposed on this topic, that
  have not yet appeared upstream or in the stable branches,

  The issue can leak kernel stack, but doesn't appear to allow userspace
  to attack the kernel directly.  The affected architectures are c6x,
  h8300, metag, mips and sparc.

  [ Mark Salter points out that c6x has no MMU or other mechanism to
    prevent userspace access to kernel code or data on c6x, but it
    doesn't hurt to clean that case up too. ]

  The bugs arise from use of user_regset_copyin(). Users of
  user_regset_copyin() can work in one of two ways:

   1) Copy directly to thread_struct or equivalent. (This seems to be
      the design assumption of the regset API, and is the most common
      approach.)

   2) Copy to a local variable and then transfer to thread_struct. (A
      significant minority of cases.)

  Buggy code typically involves approach 2"

* emailed patches from Dave Martin <Dave.Martin@arm.com>:
  sparc/ptrace: Preserve previous registers for short regset write
  mips/ptrace: Preserve previous registers for short regset write
  metag/ptrace: Reject partial NT_METAG_RPIPE writes
  metag/ptrace: Provide default TXSTATUS for short NT_PRSTATUS
  metag/ptrace: Preserve previous registers for short regset write
  h8300/ptrace: Fix incorrect register transfer count
  c6x/ptrace: Remove useless PTRACE_SETREGSET implementation

Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET
to fill all the registers, the thread's old registers are preserved.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET
to fill all the registers, the thread's old registers are preserved.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

It's not clear what behaviour is sensible when doing partial write of
NT_METAG_RPIPE, so just don't bother.

This patch assumes that userspace will never rely on a partial SETREGSET
in this case, since it's not clear what should happen anyway.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET
to fill TXSTATUS, a well-defined default value is used, based on the
task's current value.
Suggested-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET
to fill all the registers, the thread's old registers are preserved.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

regs_set() and regs_get() are vulnerable to an off-by-1 buffer overrun
if CONFIG_CPU_H8S is set, since this adds an extra entry to
register_offset[] but not to user_regs_struct.

So, iterate over user_regs_struct based on its actual size, not based on
the length of register_offset[].
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

gpr_set won't work correctly and can never have been tested, and the
correct behaviour is not clear due to the endianness-dependent task
layout.

So, just remove it.  The core code will now return -EOPNOTSUPPORT when
trying to set NT_PRSTATUS on this architecture until/unless a correct
implementation is supplied.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Kees Cook has pointed out that xfrm_replay_state_esn_len() is subject to
wrapping issues.  To ensure we are correctly ensuring that the two ESN
structures are the same size compare both the overall size as reported
by xfrm_replay_state_esn_len() and the internal length are the same.

CVE-2017-7184
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

When a new xfrm state is created during an XFRM_MSG_NEWSA call we
validate the user supplied replay_esn to ensure that the size is valid
and to ensure that the replay_window size is within the allocated
buffer.  However later it is possible to update this replay_esn via a
XFRM_MSG_NEWAE call.  There we again validate the size of the supplied
buffer matches the existing state and if so inject the contents.  We do
not at this point check that the replay_window is within the allocated
memory.  This leads to out-of-bounds reads and writes triggered by
netlink packets.  This leads to memory corruption and the potential for
priviledge escalation.

We already attempt to validate the incoming replay information in
xfrm_new_ae() via xfrm_replay_verify_len().  This confirms that the user
is not trying to change the size of the replay state buffer which
includes the replay_esn.  It however does not check the replay_window
remains within that buffer.  Add validation of the contained
replay_window.

CVE-2017-7184
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The fence allocation needs to be protected by the GPU mutex, otherwise
the fence seqnos of concurrent submits might not match the insertion order
of the jobs in the kernel ring. This breaks the assumption that jobs
complete with monotonically increasing fence seqnos.

Fixes: d9853490 (drm/etnaviv: take GPU lock later in the submit process)
CC: stable@vger.kernel.org #4.9+
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

Merge remote-tracking branches 'asoc/fix/rt5665', 'asoc/fix/simple', 'asoc/fix/sti' and 'asoc/fix/sun8i' into asoc-linus

Merge remote-tracking branches 'asoc/fix/adsp', 'asoc/fix/atmel', 'asoc/fix/hdac-hdmi' and 'asoc/fix/mtk' into asoc-linus

Pull virtio fixes from Michael Tsirkin:
 "Fixes to multiple issues in virtio.

  Most notably a regression fix for crashes reported by Fedora users.
  Hibernate is still reportedly broken, working on it"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio_balloon: prevent uninitialized variable use
  virtio-balloon: use actual number of stats for stats queue buffers
  virtio_balloon: init 1st buffer in stats vq
  virtio_pci: fix out of bound access for msix_names

Pull KVM fixes from Paolo Bonzini:
 "All x86-specific, apart from some arch-independent syzkaller fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: cleanup the page tracking SRCU instance
  KVM: nVMX: fix nested EPT detection
  KVM: pci-assign: do not map smm memory slot pages in vt-d page tables
  KVM: kvm_io_bus_unregister_dev() should never fail
  KVM: VMX: Fix enable VPID conditions
  KVM: nVMX: Fix nested VPID vmx exec control
  KVM: x86: correct async page present tracepoint
  kvm: vmx: Flush TLB when the APIC-access address changes
  KVM: x86: use pic/ioapic destructor when destroy vm
  KVM: x86: check existance before destroy
  KVM: x86: clear bus pointer when destroyed
  KVM: Documentation: document MCE ioctls
  KVM: nVMX: don't reset kvm mmu twice
  PTP: fix ptr_ret.cocci warnings
  kvm: fix usage of uninit spinlock in avic_vm_destroy()
  KVM: VMX: downgrade warning on unexpected exit code

The latest gcc-7.0.1 snapshot reports a new warning:

virtio/virtio_balloon.c: In function 'update_balloon_stats':
virtio/virtio_balloon.c:258:26: error: 'events[2]' is used uninitialized in this function [-Werror=uninitialized]
virtio/virtio_balloon.c:260:26: error: 'events[3]' is used uninitialized in this function [-Werror=uninitialized]
virtio/virtio_balloon.c:261:56: error: 'events[18]' is used uninitialized in this function [-Werror=uninitialized]
virtio/virtio_balloon.c:262:56: error: 'events[17]' is used uninitialized in this function [-Werror=uninitialized]

This seems absolutely right, so we should add an extra check to
prevent copying uninitialized stack data into the statistics.
>From all I can tell, this has been broken since the statistics code
was originally added in 2.6.34.

Fixes: 9564e138 ("virtio: Add memory statistics reporting to the balloon driver (V4)")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

The virtio balloon driver contained a not-so-obvious invariant that
update_balloon_stats has to update exactly VIRTIO_BALLOON_S_NR counters
in order to send valid stats to the host. This commit fixes it by having
update_balloon_stats return the actual number of counters, and its
callers use it when pushing buffers to the stats virtqueue.

Note that it is still out of spec to change the number of counters
at run-time. "Driver MUST supply the same subset of statistics in all
buffers submitted to the statsq."
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

When init_vqs runs, virtio_balloon.stats is either uninitialized or
contains stale values. The host updates its state with garbage data
because it has no way of knowing that this is just a marker buffer
used for signaling.

This patch updates the stats before pushing the initial buffer.

Alternative fixes:
* Push an empty buffer in init_vqs. Not easily done with the current
  virtio implementation and violates the spec "Driver MUST supply the
  same subset of statistics in all buffers submitted to the statsq".
* Push a buffer with invalid tags in init_vqs. Violates the same
  spec clause, plus "invalid tag" is not really defined.

Note: the spec says:
	When using the legacy interface, the device SHOULD ignore all values in
	the first buffer in the statsq supplied by the driver after device
	initialization. Note: Historically, drivers supplied an uninitialized
	buffer in the first buffer.

Unfortunately QEMU does not seem to implement the recommendation
even for the legacy interface.

Cc: stable@vger.kernel.org
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Fedora has received multiple reports of crashes when running
4.11 as a guest

https://bugzilla.redhat.com/show_bug.cgi?id=1430297
https://bugzilla.redhat.com/show_bug.cgi?id=1434462
https://bugzilla.kernel.org/show_bug.cgi?id=194911
https://bugzilla.redhat.com/show_bug.cgi?id=1433899

The crashes are not always consistent but they are generally
some flavor of oops or GPF in virtio related code. Multiple people
have done bisections (Thank you Thorsten Leemhuis and
Richard W.M. Jones) and found this commit to be at fault

07ec5148 is the first bad commit
commit 07ec5148
Author: Christoph Hellwig <hch@lst.de>
Date:   Sun Feb 5 18:15:19 2017 +0100

    virtio_pci: use shared interrupts for virtqueues

The issue seems to be an out of bounds access to the msix_names
array corrupting kernel memory.

Fixes: 07ec5148 ("virtio_pci: use shared interrupts for virtqueues")
Reported-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Tested-by: Thorsten Leemhuis <linux@leemhuis.info>