[SRU][Cosmic][PULL] Updates for Spectre v1 (CVE-2017-5753)

[Juerg Haefliger]

This pull request contains fix(es) for the following CVE(s):
  CVE-2017-5753

Pull in the latest Spectre v1 fixes from mainline. All commits are either
clean cherry-picks or simple backports (context adjustments only).

The changes are fairly trivial and non-intrusive (low risk) in that they
sprinkle array_index_nospec() calls over different places where an array
index is user controllable.

Compile-tested all supported architectures.

Signed-off-by: Juerg Haefliger <juergh at canonical.com>
---

The following changes since commit 0a4b03deaca7749c26b776ded32d6ea38db0b3ee:

  openvswitch: fix flow actions reallocation (2019-04-08 17:21:25 +0200)

are available in the Git repository at:

  git://git.launchpad.net/~juergh/+git/cosmic-linux update-spectre-v1

for you to fetch changes up to 2ff3f1444a12589176e2c628465cdd465b8ffa03:

  ALSA: seq: oss: Fix Spectre v1 vulnerability (2019-04-09 09:47:03 +0200)

----------------------------------------------------------------
Breno Leitao (1):
      powerpc/ptrace: Mitigate potential Spectre v1

David S. Miller (1):
      net: Revert recent Spectre-v1 patches.

Gustavo A. R. Silva (19):
      drm/bufs: Fix Spectre v1 vulnerability
      drivers/misc/sgi-gru: fix Spectre v1 vulnerability
      ipv4: Fix potential Spectre v1 vulnerability
      ALSA: emux: Fix potential Spectre v1 vulnerabilities
      ALSA: pcm: Fix potential Spectre v1 vulnerability
      ip6mr: Fix potential Spectre v1 vulnerability
      ALSA: rme9652: Fix potential Spectre v1 vulnerability
      ALSA: emu10k1: Fix potential Spectre v1 vulnerabilities
      KVM: arm/arm64: vgic: Fix off-by-one bug in vgic_get_irq()
      drm/ioctl: Fix Spectre v1 vulnerabilities
      net: core: Fix Spectre v1 vulnerability
      phonet: af_phonet: Fix Spectre v1 vulnerability
      nfc: af_nfc: Fix Spectre v1 vulnerability
      can: af_can: Fix Spectre v1 vulnerability
      char/mwave: fix potential Spectre v1 vulnerability
      applicom: Fix potential Spectre v1 vulnerabilities
      ipmi: msghandler: Fix potential Spectre v1 vulnerabilities
      ALSA: rawmidi: Fix potential Spectre v1 vulnerability
      ALSA: seq: oss: Fix Spectre v1 vulnerability

Jeff Moyer (1):
      aio: fix spectre gadget in lookup_ioctx

Johannes Berg (1):
      cfg80211: prevent speculation on cfg80211_classify8021d() return

Martin Schwidefsky (1):
      s390/keyboard: sanitize array index in do_kdsk_ioctl

 arch/powerpc/kernel/ptrace.c        |  8 +++++++-
 drivers/char/applicom.c             | 35 ++++++++++++++++++++++++-----------
 drivers/char/ipmi/ipmi_msghandler.c | 26 ++++++++++++++++++--------
 drivers/char/mwave/mwavedd.c        |  7 +++++++
 drivers/gpu/drm/drm_bufs.c          |  3 +++
 drivers/gpu/drm/drm_ioctl.c         | 10 ++++++++--
 drivers/misc/sgi-gru/grukdump.c     |  4 ++++
 drivers/s390/char/keyboard.c        | 28 ++++++++++++++++------------
 fs/aio.c                            |  2 ++
 net/ipv4/ipmr.c                     |  4 ++++
 net/ipv6/ip6mr.c                    |  4 ++++
 net/wireless/util.c                 | 34 ++++++++++++++++++++++++----------
 sound/core/pcm.c                    |  2 ++
 sound/core/rawmidi.c                |  2 ++
 sound/core/seq/oss/seq_oss_synth.c  |  7 ++++---
 sound/pci/emu10k1/emufx.c           |  5 +++++
 sound/pci/rme9652/hdsp.c            | 10 ++++++----
 sound/synth/emux/emux_hwdep.c       |  7 +++++--
 virt/kvm/arm/vgic/vgic.c            |  2 +-
 19 files changed, 146 insertions(+), 54 deletions(-)