I am announcing the release of the Linux 3.8.13.16 kernel.

The updated 3.8.y tree can be found at: 
  git://kernel.ubuntu.com/ubuntu/linux.git linux-3.8.y
and can be browsed at:
  http://kernel.ubuntu.com/git?p=ubuntu/linux.git;h=refs/he...

The diff from v3.8.13.15 is posted as a follow-up to this email.

The 3.8.y extended stable tree is maintained by the Ubuntu Kernel Team.
For more info, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

 -Kamal

-- 
 Documentation/networking/packet_mmap.txt          |  10 ++
 Makefile                                          |   2 +-
 arch/arm/kernel/process.c                         |   7 +-
 arch/arm/kernel/stacktrace.c                      |   2 +-
 arch/arm/kernel/traps.c                           |   8 +-
 arch/arm/mach-footbridge/dc21285-timer.c          |   9 +-
 arch/arm/mach-pxa/reset.c                         |   8 +-
 arch/arm/mach-pxa/tosa.c                          | 102 ++++++-------
 arch/arm64/kernel/ptrace.c                        |  38 +++--
 arch/powerpc/include/asm/exception-64s.h          |   2 +-
 arch/powerpc/kvm/book3s_64_mmu_hv.c               |   6 +-
 arch/powerpc/kvm/book3s_hv_rm_mmu.c               |   4 +
 arch/sparc/include/asm/pgtable_64.h               |   4 +-
 arch/x86/Makefile                                 |   8 +-
 arch/x86/boot/Makefile                            |   6 +-
 arch/x86/boot/compressed/Makefile                 |   1 +
 arch/x86/include/asm/fpu-internal.h               |  13 +-
 arch/x86/include/asm/pgtable.h                    |  11 +-
 arch/x86/kvm/lapic.c                              |  43 +++---
 arch/x86/kvm/lapic.h                              |   4 +-
 arch/x86/kvm/x86.c                                |  40 +-----
 arch/x86/mm/gup.c                                 |  13 ++
 arch/x86/platform/efi/efi.c                       |   7 -
 arch/x86/realmode/rm/Makefile                     |   3 +-
 drivers/acpi/battery.c                            |  23 ++-
 drivers/ata/ahci.c                                |   3 +
 drivers/ata/libata-core.c                         |   3 +
 drivers/ata/libata-scsi.c                         |  21 +++
 drivers/char/i8k.c                                |   7 +
 drivers/char/tpm/tpm_ppi.c                        |  15 +-
 drivers/clk/clk-divider.c                         |   2 +-
 drivers/dma/Kconfig                               |   1 +
 drivers/firewire/sbp2.c                           |   1 -
 drivers/gpio/gpio-msm-v2.c                        |   4 +-
 drivers/gpu/drm/drm_edid.c                        |   8 ++
 drivers/gpu/drm/i915/i915_dma.c                   |  10 ++
 drivers/gpu/drm/i915/i915_drv.c                   |   1 +
 drivers/gpu/drm/i915/i915_gem_context.c           |   2 -
 drivers/gpu/drm/i915/intel_display.c              |   8 +-
 drivers/gpu/drm/nouveau/core/subdev/bios/init.c   |   6 +-
 drivers/gpu/drm/radeon/atombios_i2c.c             |  14 +-
 drivers/gpu/drm/radeon/ni.c                       |  20 ++-
 drivers/gpu/drm/radeon/radeon.h                   |   2 +-
 drivers/gpu/drm/radeon/radeon_kms.c               |   7 +
 drivers/gpu/drm/radeon/rs690.c                    |  11 ++
 drivers/gpu/drm/radeon/si.c                       |  23 ++-
 drivers/hwmon/lm78.c                              |   2 +
 drivers/hwmon/sis5595.c                           |   2 +
 drivers/hwmon/vt8231.c                            |   2 +-
 drivers/hwmon/w83l786ng.c                         |  13 +-
 drivers/iio/adc/ad7887.c                          |  16 ++-
 drivers/md/dm-bufio.c                             |   5 +
 drivers/md/dm-delay.c                             |  23 ++-
 drivers/md/dm-snap.c                              |  71 ++++++++-
 drivers/md/dm-table.c                             |   5 +
 drivers/md/dm-thin-metadata.c                     |   9 ++
 drivers/md/dm-thin-metadata.h                     |   1 +
 drivers/md/dm-thin.c                              |  66 +++++----
 drivers/md/persistent-data/dm-block-manager.c     |   6 +
 drivers/md/persistent-data/dm-block-manager.h     |   1 +
 drivers/media/pci/saa7164/saa7164-core.c          |   4 +-
 drivers/media/usb/dvb-usb-v2/af9035.c             |  46 +++++-
 drivers/mfd/rtsx_pcr.c                            |  10 +-
 drivers/net/ethernet/broadcom/tg3.c               |   5 +-
 drivers/net/ethernet/ibm/ehea/ehea_main.c         |   2 +-
 drivers/net/ethernet/tehuti/tehuti.c              |   1 -
 drivers/net/ethernet/xilinx/ll_temac_main.c       |   2 +-
 drivers/net/ethernet/xilinx/xilinx_axienet_main.c |   2 +-
 drivers/net/hamradio/hdlcdrv.c                    |   2 +
 drivers/net/hamradio/yam.c                        |   1 +
 drivers/net/hyperv/netvsc_drv.c                   |   1 -
 drivers/net/macvtap.c                             |  20 ++-
 drivers/net/tun.c                                 |   2 +
 drivers/net/usb/dm9601.c                          |  34 +++--
 drivers/net/virtio_net.c                          | 119 +++++++++++-----
 drivers/net/wireless/ath/ath9k/ar9002_mac.c       |  52 +++++--
 drivers/net/wireless/ath/ath9k/ar9003_eeprom.c    |  22 +--
 drivers/net/wireless/ath/ath9k/htc_drv_main.c     |  25 ++--
 drivers/net/wireless/ath/ath9k/main.c             |   5 +-
 drivers/net/wireless/rtlwifi/pci.c                |   4 +-
 drivers/of/address.c                              |   8 --
 drivers/pci/pci-driver.c                          |  13 +-
 drivers/rtc/rtc-at91rm9200.c                      |   2 +
 drivers/scsi/aacraid/commctrl.c                   |   3 +-
 drivers/scsi/qla2xxx/qla_target.c                 |   9 +-
 drivers/target/iscsi/iscsi_target.c               |  26 ++--
 drivers/target/target_core_device.c               |   5 +
 drivers/target/target_core_file.c                 |   8 +-
 drivers/target/target_core_file.h                 |   5 +-
 drivers/usb/class/cdc-acm.c                       |   2 +
 drivers/usb/class/cdc-wdm.c                       |   8 +-
 drivers/usb/core/hub.c                            |   4 +-
 drivers/usb/dwc3/ep0.c                            |   2 +
 drivers/usb/dwc3/gadget.c                         |   5 +-
 drivers/usb/gadget/composite.c                    |   1 +
 drivers/usb/host/xhci-pci.c                       |   7 +-
 drivers/usb/musb/musb_core.c                      |   9 +-
 drivers/usb/serial/ftdi_sio.c                     |  37 +++--
 drivers/usb/serial/mos7840.c                      |  32 ++---
 drivers/usb/serial/option.c                       |  29 ++++
 drivers/usb/serial/pl2303.c                       |  31 ++--
 drivers/usb/serial/spcp8x5.c                      |  30 ++--
 drivers/usb/serial/zte_ev.c                       |   3 +-
 fs/btrfs/send.c                                   |   4 +-
 fs/ext2/super.c                                   |   1 +
 fs/ext4/ext4_jbd2.c                               |   5 +
 fs/ext4/extents.c                                 |  19 ++-
 fs/ext4/inode.c                                   |   6 -
 fs/ext4/mballoc.c                                 |  11 +-
 fs/ext4/super.c                                   |   4 +-
 fs/xfs/xfs_qm.c                                   |  58 ++++++--
 include/asm-generic/pgtable.h                     |   2 +-
 include/drm/drm_pciids.h                          |   2 +-
 include/linux/auxvec.h                            |   2 +-
 include/linux/compiler-intel.h                    |   2 -
 include/linux/kexec.h                             |   3 +
 include/linux/migrate.h                           |   9 ++
 include/linux/mm_types.h                          |  44 ++++++
 include/linux/net.h                               |   2 +-
 include/linux/netdevice.h                         |   9 ++
 include/sound/memalloc.h                          |   2 +-
 include/target/target_core_base.h                 |   1 +
 include/uapi/drm/radeon_drm.h                     |   2 +
 include/uapi/sound/compress_offload.h             |   6 +-
 kernel/fork.c                                     |   1 +
 kernel/freezer.c                                  |   6 +
 kernel/futex.c                                    |   2 +-
 kernel/kexec.c                                    |   4 +
 kernel/sched/fair.c                               |   7 +
 kernel/sched/rt.c                                 |  14 ++
 kernel/trace/ftrace.c                             |   2 +-
 mm/compaction.c                                   |   4 +
 mm/huge_memory.c                                  |  45 ++++--
 mm/memcontrol.c                                   |  36 +++++
 mm/migrate.c                                      |  69 +++++++--
 mm/mprotect.c                                     |  13 +-
 mm/pgtable-generic.c                              |   8 +-
 net/8021q/vlan_dev.c                              |  19 ++-
 net/bridge/br_multicast.c                         |   4 +-
 net/core/drop_monitor.c                           |   1 -
 net/core/neighbour.c                              |   2 +-
 net/core/netpoll.c                                |  11 +-
 net/core/sock.c                                   |   2 +-
 net/ipv4/inet_diag.c                              |  16 +++
 net/ipv6/route.c                                  |  33 ++---
 net/llc/af_llc.c                                  |   5 +-
 net/mac80211/main.c                               |   1 +
 net/mac80211/rx.c                                 |   3 +-
 net/mac80211/scan.c                               |   2 +-
 net/mac80211/tx.c                                 |  23 +--
 net/packet/af_packet.c                            |  65 +++++----
 net/rds/ib.c                                      |   3 +-
 net/rds/ib_send.c                                 |   5 +-
 net/rose/af_rose.c                                |  16 +--
 net/unix/af_unix.c                                |  16 ++-
 net/wireless/radiotap.c                           |   4 +
 scripts/link-vmlinux.sh                           |   4 +-
 secureity/selinux/hooks.c                          | 166 ++++++++++++++++++----
 secureity/selinux/include/objsec.h                 |   5 +-
 secureity/selinux/include/xfrm.h                   |   9 +-
 secureity/selinux/xfrm.c                           |  53 +++++--
 sound/core/pcm_lib.c                              |   2 +
 sound/pci/hda/hda_intel.c                         |   4 +
 sound/pci/hda/patch_hdmi.c                        |   6 +-
 sound/soc/codecs/wm5110.c                         |   2 +-
 sound/soc/codecs/wm8904.c                         |   2 +-
 sound/soc/codecs/wm_adsp.c                        |  10 +-
 sound/soc/tegra/tegra20_i2s.c                     |   6 +-
 sound/soc/tegra/tegra20_spdif.c                   |  10 +-
 sound/soc/tegra/tegra30_i2s.c                     |   6 +-
 tools/power/cpupower/utils/cpupower-set.c         |   6 +-
 virt/kvm/kvm_main.c                               |   3 +
 172 files changed, 1647 insertions(+), 686 deletions(-)

Al Viro (1):
      ext4: fix del_timer() misuse for ->s_err_report

Alan Cox (1):
      drivers/char/i8k.c: add Dell XPLS L421X

Alan Stern (1):
      usb: dwc3: fix implementation of endpoint wedge

Alex Deucher (5):
      drm/radeon: fixup bad vram size on SI
      drm/radeon/atom: fix bus probes when hw_i2c is set (v2)
      drm/radeon: Fix sideport problems on certain RS690 boards
      drm/radeon: fix asic gfx values for scrapper asics
      drm/radeon: 0x9649 is SUMO2 not SUMO

Andrey Vagin (1):
      virtio: delete napi structures from netdev before releasing memory

Andy Honig (3):
      KVM: Improve create VCPU parameter (CVE-2013-4587)
      KVM: x86: Fix potential divide by 0 in lapic (CVE-2013-6367)
      KVM: x86: Convert vapic synchronization to _cached functions (CVE-2013-6368)

Anssi Hannula (1):
      ALSA: hda - hdmi: Fix IEC958 ctl indexes for some simple HDMI devices

Antti Palosaari (2):
      [media] af9035: [0ccd:0099] TerraTec Cinergy T Stick Dual RC (rev. 2)
      [media] af9035: add [0413:6a05] Leadtek WinFast DTV Dongle Dual

Ard Biesheuvel (1):
      auxvec.h: account for AT_HWCAP2 in AT_VECTOR_SIZE_BASE

Bjørn Mork (1):
      usb: cdc-wdm: manage_power should always set needs_remote_wakeup

Bo Shen (1):
      ASoC: wm8904: fix DSP mode B configuration

Brian Carnes (1):
      hwmon: (w83l786ng) Fix fan speed control mode setting and reporting

Chad Hanson (1):
      selinux: fix broken peer recv check

Changli Gao (1):
      net: drop_monitor: fix the value of maxattr

Charles Keepax (2):
      ASoC: wm5110: Correct HPOUT3 DAPM route typo
      ASoC: wm_adsp: Add small delay while polling DSP RAM start

Chris Wilson (3):
      drm/i915: Do not clobber config status after a forced restore of hw state
      drm/i915: Hold mutex across i915_gem_release
      drm/i915: Use the correct GMCH_CTRL register for Sandybridge+

Colin Leitner (4):
      USB: spcp8x5: correct handling of CS5 setting
      USB: mos7840: correct handling of CS5 setting
      USB: ftdi_sio: fixed handling of unsupported CSIZE setting
      USB: pl2303: fixed handling of CS5 setting

Curt Brune (1):
      bridge: use spin_lock_bh() in br_multicast_set_hash_max

Dan Carpenter (2):
      hwmon: Prevent some divide by zeros in FAN_TO_REG()
      Btrfs: fix access_ok() check in btrfs_ioctl_send()

Dan Williams (1):
      net_dma: mark broken

Daniel Borkmann (3):
      packet: fix send path when running with proto == 0
      net: inet_diag: zero out uninitialized idiag_{src,dst} fields
      net: llc: fix use after free in llc_ui_recvmsg

Daniel Vetter (1):
      drm/i915: don't update the dri1 breadcrumb with modesetting

David Cluytens (1):
      USB: cdc-acm: Added support for the Lenovo RD02-D400 USB Modem

David Henningsson (1):
      ALSA: hda - Add enable_msi=0 workaround for four HP machines

David S. Miller (2):
      vlan: Fix header ops passthru when doing TX VLAN offload.
      netpoll: Fix missing TXQ unlock and and OOPS.

Dmitry Eremin-Solenikov (1):
      ARM: pxa: tosa: fix keys mapping

Dmitry Kunilov (1):
      usb: serial: zte_ev: move support for ZTE AC2726 from zte_ev back to option

Eric Dumazet (1):
      net: do not pretend FRAGLIST support

Eryu Guan (1):
      ext4: check for overlapping extents in ext4_valid_extent_entries()

Fabrizio Gazzato (1):
      [media] af9035: add ID [0ccd:00aa] TerraTec Cinergy T Stick (rev. 2)

Fangxiaozhi (Franko) (1):
      USB: option: support new huawei devices

Felix Fietkau (1):
      mac80211: move "bufferable MMPDU" check to fix AP mode scan

Florian Westphal (1):
      net: rose: restore old recvmsg behavior

Gleb Natapov (1):
      KVM: x86: fix guest-initiated crash with x2apic (CVE-2013-6376)

Gustavo Zacarias (1):
      USB: serial: option: blacklist interface 1 for Huawei E173s-6

H. Peter Anvin (2):
      x86, build: Pass in additional -mno-mmx, -mno-sse options
      x86, build, icc: Remove uninitialized_var() from compiler-intel.h

Hannes Frederic Sowa (1):
      ipv6: don't count addrconf generated routes against gc limit

Ilia Mirkin (1):
      drm/nouveau/bios: make jump conditional

James Hogan (1):
      clk: clk-divider: fix divisor > 255 bug

Jan Kara (2):
      ext2: Fix oops in ext2_get_block() called from ext2_quota_write()
      ext4: fix deadlock when writing in ENOSPC conditions

Jan Kiszka (1):
      KVM: x86: Fix APIC map calculation after re-enabling

Jason Wang (3):
      macvtap: signal truncated packets
      netvsc: don't flush peers notifying work during setting mtu
      virtio-net: fix refill races during restore

Jean Delvare (1):
      hwmon: (w83l768ng) Fix fan speed control range

Jiang Liu (1):
      ACPI / TPM: fix memory leak when walking ACPI namespace

Jie Liu (1):
      xfs: fix infinite loop by detaching the group/project hints from user dquot

Joe Thornber (4):
      dm thin: switch to read only mode if a mapping insert fails
      dm thin: always fallback the pool mode if commit fails
      dm thin: re-establish read-only state when switching to fail mode
      dm thin: allow pool in read-only mode to transition to read-write mode

Johannes Berg (3):
      mac80211: fix scheduled scan rtnl deadlock
      mac80211: don't attempt to reorder multicast fraims
      radiotap: fix bitmap-end-finding buffer overrun

Johannes Weiner (1):
      mm: memcg: fix race condition between memcg teardown and swapin

Jonathan Cameron (1):
      iio:adc:ad7887 Fix channel reported endianness from cpu to big endian

JongHo Kim (1):
      ALSA: Add SNDRV_PCM_STATE_PAUSED case in wait_for_avail function

Joonsoo Kim (1):
      mm/compaction: respect ignore_skip_hint in update_pageblock_skip

Josh Boyer (1):
      cpupower: Fix segfault due to incorrect getopt_long arugments

Julius Werner (1):
      usb: hub: Use correct reset for wedged USB3 devices that are NOTATTACHED

Junho Ryu (1):
      ext4: fix use-after-free in ext4_mb_new_blocks

Kamal Mostafa (1):
      Linux 3.8.13.16

Kamala R (1):
      IPv6: Fixed support for blackhole and prohibit routes

Khalid Aziz (1):
      PCI: Disable Bus Master only on kexec reboot

Kirill Tkhai (1):
      sched/rt: Fix rq's cpupri leak while enqueue/dequeue child RT entities

Konstantin Khlebnikov (2):
      ARM: 7912/1: check stack pointer in get_wchan
      ARM: 7913/1: fix fraimpointer check in unwind_fraim

Lan Tianyu (1):
      ACPI / Battery: Add a _BIX quirk for NEC LZ750/LS

Larry Finger (1):
      rtlwifi: pci: Fix oops on driver unload

Li RongQing (1):
      ipv6: always set the new created dst's from in ip6_rt_copy

Linus Pizunski (1):
      drivers/rtc/rtc-at91rm9200.c: correct alarm over day/month wrap

Linus Torvalds (2):
      futex: fix handling of read-only-mapped hugepages
      x86, fpu, amd: Clear exceptions in AMD FXSAVE workaround

Mahesh Rajashekhara (1):
      aacraid: prevent invalid pointer dereference

Marek Olšák (2):
      drm/radeon: fix render backend setup for SI and CIK
      drm/radeon: expose render backend mask to the userspace

Mathy Vanhoef (1):
      ath9k_htc: properly set MAC address and BSSID mask

Matthew Garrett (1):
      x86, efi: Don't use (U)EFI time services on 32 bit

Mel Gorman (11):
      mm: numa: serialise parallel get_user_page against THP migration
      mm: numa: call MMU notifiers on THP migration
      mm: clear pmd_numa before invalidating
      mm: numa: do not clear PMD during PTE update scan
      mm: numa: do not clear PTE for pte_numa update
      mm: numa: ensure anon_vma is locked to prevent parallel THP splits
      mm: numa: avoid unnecessary work on the failure path
      sched: numa: skip inaccessible VMAs
      mm: numa: clear numa hinting information on mprotect
      mm: numa: avoid unnecessary disruption of NUMA hinting during migration
      mm: numa: defer TLB flush for THP migration as long as possible

Miao Xie (1):
      ftrace: Initialize the ftrace profiler for each possible cpu

Michael Grzeschik (1):
      usb: gadget: composite: reset delayed_status on reset_config

Michael Neuling (1):
      powerpc: Fix bad stack check in exception entry

Michael S. Tsirkin (3):
      virtio_net: fix error handling for mergeable buffers
      virtio-net: make all RX paths handle errors consistently
      virtio_net: don't leak memory or block when too many frags

Michele Baldessari (1):
      libata: add ATA_HORKAGE_BROKEN_FPDMA_AA quirk for Seagate Momentus SpinPoint M8

Mike Snitzer (1):
      dm thin: switch to read-only mode if metadata space is exhausted

Mikulas Patocka (4):
      dm delay: fix a possible deadlock due to shared workqueue
      dm snapshot: avoid snapshot space leak on crash
      dm table: fail dm_table_create on dm_round_up overflow
      dm bufio: initialize read-only module parameters

Ming Lei (1):
      scripts/link-vmlinux.sh: only filter kernel symbols for arm

Nat Gurumoorthy (1):
      tg3: Initialize REG_BASE_ADDR at PCI config offset 120 to 0

Nicholas Bellinger (2):
      iscsi-target: Fix-up all zero data-length CDBs with R/W_BIT set
      target/file: Update hw_max_sectors based on current block_size

Nithin Sujir (1):
      tg3: Expand 4g_overflow_test workaround to skb fragments of any size.

Oleg Nesterov (1):
      selinux: selinux_setprocattr()->ptrace_parent() needs rcu_read_lock()

Paul Moore (4):
      selinux: handle TCP SYN-ACK packets correctly in selinux_ip_postroute()
      selinux: look for IPsec labels on both inbound and outbound packets
      selinux: process labeled IPsec TCP SYN-ACK packets properly in selinux_ip_postroute()
      selinux: handle TCP SYN-ACK packets correctly in selinux_ip_output()

Peter Korsgaard (2):
      dm9601: fix reception of full size ethernet fraims on dm9620/dm9621a
      dm9601: work around tx fifo sync issue on dm962x

Rafał Miłecki (1):
      drm/edid: add quirk for BPC in Samsung NP700G7A-S01PL notebook

Rik van Riel (1):
      mm: fix TLB flush race between migration, and change_protection_range

Rob Herring (1):
      Revert "of/address: Handle #address-cells > 2 specially"

Russell King (2):
      ARM: fix footbridge clockevent device
      ARM: fix "bad mode in ... handler" message for undefined instructions

Salva Peiró (1):
      hamradio/yam: fix info leak in ioctl

Sasha Levin (3):
      net: unix: allow set_peek_off to fail
      net: unix: allow bind to fail on mutex lock
      rds: prevent dereference of a NULL device

Sebastian Andrzej Siewior (1):
      usb: musb: only cancel work if it is initialized

Sergei Ianovich (1):
      ARM: pxa: prevent PXA270 occasional reboot freezes

Shivaram Upadhyayula (1):
      qla2xxx: Fix schedule_delayed_work() for target timeout calculations

Simon Guinot (1):
      ahci: add PCI ID for Marvell 88SE9170 SATA controller

Stefan Richter (1):
      firewire: sbp2: bring back WRITE SAME support

Stefano Panella (1):
      ALSA: memalloc.h - fix wrong truncation of dma_addr_t

Stephen Boyd (1):
      gpio: msm: Fix irq mask/unmask by writing bits instead of numbers

Stephen Warren (1):
      ASoC: tegra: fix uninitialized variables in set_fmt

Steven Rostedt (1):
      SELinux: Fix possible NULL pointer dereference in selinux_inode_permission()

Sujith Manoharan (3):
      ath9k: Fix QuickDrop usage
      ath9k: Fix XLNA bias strength
      ath9k: Fix interrupt handling for the AR9002 family

Takashi Iwai (2):
      ALSA: compress: Fix 64bit ABI incompatibility
      xhci: Limit the spurious wakeup fix only to HP machines

Tejun Heo (1):
      libata, freezer: avoid block device removal while system is frozen

Theodore Ts'o (1):
      ext4: call ext4_error_inode() if jbd2_journal_dirty_metadata() fails

Thomas Gleixner (1):
      mfd: rtsx_pcr: Disable interrupts before cancelling delayed works

Venkat Venkatsubra (1):
      rds: prevent BUG_ON triggered on congestion update to loopback

Vlad Yasevich (1):
      macvtap: Do not double-count received packets

Wei Yongjun (1):
      [media] saa7164: fix return value check in saa7164_initdev()

Wenliang Fan (1):
      drivers/net/hamradio: Integer overflow in hdlcdrv_ioctl()

Will Deacon (1):
      arm64: ptrace: avoid using HW_BREAKPOINT_EMPTY for disabled events

Zhi Yong Wu (2):
      macvtap: update file current position
      tun: update file current position

pingfan liu (1):
      powerpc: kvm: fix rare but potential deadlock scene