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[Serge Hallyn <1268906@xxxxxxxxxxxxxxxxxx>]

On my AMD laptop (x130e thinkpad) with a uptodate trusty amd64 install,
I cannot reproduce this.  After installing a 32-bit trusty image, I can
in fact reproduce it:

Jan 27 13:07:05 serge-ThinkPad-X130e kernel: [  725.593411] kvm: zapping shadow pages for mmio generation wraparound
Jan 27 13:07:19 serge-ThinkPad-X130e kernel: [  740.100465] kvm [3887]: vcpu0 unhandled rdmsr: 0xc0010001
Jan 27 13:07:21 serge-ThinkPad-X130e kernel: [  742.187275] usb 1-1: USB disconnect, device number 3
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524715] BUG: soft lockup - CPU#0 stuck for 22s! [qemu-system-i38:3889]
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524729] Modules linked in: usb_storage parport_pc ppdev joydev rfcomm bnep arc4 uvcvideo rtl8192ce videobuf2_vmalloc videobuf2_memops videobuf2_core videodev rtl_pci kvm_amd rtlwifi kvm rtl8192c_common mac80211 microcode snd_hda_codec_conexant btusb snd_hda_codec_hdmi radeon cfg80211 bluetooth thinkpad_acpi snd_hda_intel snd_hda_codec nvram snd_hwdep snd_seq_midi snd_pcm snd_seq_midi_event snd_rawmidi snd_seq ttm psmouse drm_kms_helper snd_seq_device sp5100_tco snd_page_alloc rtsx_pci_ms serio_raw memstick drm snd_timer i2c_piix4 k10temp wmi i2c_algo_bit snd soundcore video mac_hid lp parport rtsx_pci_sdmmc rtsx_pci atl1c ahci libahci
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524815] CPU: 0 PID: 3889 Comm: qemu-system-i38 Not tainted 3.13.0-5-generic #20-Ubuntu
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524820] Hardware name: LENOVO 062223U/062223U, BIOS 8RET52WW (1.15 ) 11/15/2011
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524825] task: edc78d00 ti: f63e6000 task.ti: f63e6000
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524830] EIP: 0060:[<c10a9cac>] EFLAGS: 00000202 CPU: 0
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524840] EIP is at __srcu_read_lock+0x2c/0x50
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524845] EAX: f14e4024 EBX: 00000000 ECX: f7bdddf0 EDX: 00000000
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524848] ESI: 00000001 EDI: 00000001 EBP: f63e7dec ESP: f63e7de4
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524852]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524856] CR0: 8005003b CR2: ffffffff CR3: 35e58000 CR4: 000007f0
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524860] Stack:
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524863]  f626b550 00000000 f63e7e6c f91da2f6 000000b2 f7bd3400 57c83df4 134d36c2
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524873]  f7bd3140 edc78d00 00000046 00000000 edc78d00 f626b550 003e7e24 c1058fb7
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524882]  f63e7e30 c164c598 f626b570 f63e7e94 c1644fac f626b570 360df2c8 f14e2008
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524892] Call Trace:
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524933]  [<f91da2f6>] vcpu_enter_guest+0x636/0xc90 [kvm]
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524941]  [<c1058fb7>] ? irq_exit+0x47/0xa0
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524950]  [<c164c598>] ? smp_apic_timer_interrupt+0x38/0x50
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524957]  [<c1644fac>] ? apic_timer_interrupt+0x34/0x3c
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.524988]  [<f91de0bf>] kvm_arch_vcpu_ioctl_run+0x1cf/0x3e0 [kvm]
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.525011]  [<f91ca0f3>] kvm_vcpu_ioctl+0x433/0x4d0 [kvm]
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.525019]  [<c1039eeb>] ? lapic_next_event+0x1b/0x20
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.525025]  [<c10b6315>] ? clockevents_program_event+0x95/0x130
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.525031]  [<c10b7989>] ? tick_program_event+0x29/0x30
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.525036]  [<c1076002>] ? hrtimer_interrupt+0x142/0x2b0
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.525042]  [<c1039eeb>] ? lapic_next_event+0x1b/0x20
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.525064]  [<f91c9cc0>] ? vcpu_put+0x30/0x30 [kvm]
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.525071]  [<c1185ee2>] do_vfs_ioctl+0x2e2/0x4d0
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.525078]  [<c10b0258>] ? ktime_get_ts+0x48/0x140
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.525083]  [<c1186130>] SyS_ioctl+0x60/0x80
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.525088]  [<c164bdcd>] sysenter_do_call+0x12/0x28
Jan 27 13:07:48 serge-ThinkPad-X130e kernel: [  768.525091] Code: 89 e5 56 53 3e 8d 74 26 00 8b 10 83 e2 01 8b 48 04 64 03 0d 04 d1 a6 c1 8d 1c 95 00 00 00 00 01 d9 8b 31 83 c6 01 89 31 0f ae f0 <89> f6 8b 40 04 64 03 05 04 d1 a6 c1 01 d8 8b 48 08 83 c1 01 89

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https://bugs.launchpad.net/bugs/1268906

Title:
  cpu soft lockup running kvm

Status in “linux” package in Ubuntu:
  Confirmed
Status in “qemu-kvm” package in Ubuntu:
  Confirmed

Bug description:
  Ran twice - first time running kvm killed my system. The second time,
  I just got lots of kernel oops messages in dmesg.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-2-generic 3.13.0-2.17
  ProcVersionSignature: Ubuntu 3.13.0-2.17-generic 3.13.0-rc7
  Uname: Linux 3.13.0-2-generic i686
  NonfreeKernelModules: nvidia
  ApportVersion: 2.13.1-0ubuntu1
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  james      3250 F.... pulseaudio
   /dev/snd/controlC0:  james      3250 F.... pulseaudio
   /dev/snd/pcmC0D0p:   james      3250 F...m pulseaudio
  CurrentDesktop: Unity
  Date: Tue Jan 14 10:29:20 2014
  HibernationDevice: RESUME=UUID=67e3cd44-242b-4bbf-918b-28fff81e0312
  InstallationDate: Installed on 2010-10-21 (1181 days ago)
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
  MachineType: LENOVO 2516CTO
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-2-generic root=UUID=7ad192e9-7b26-49d1-8e1c-fefc7dc495cb ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-2-generic N/A
   linux-backports-modules-3.13.0-2-generic  N/A
   linux-firmware                            1.121
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2013-11-01 (73 days ago)
  dmi.bios.date: 08/27/2010
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6IET72WW (1.32 )
  dmi.board.name: 2516CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr6IET72WW(1.32):bd08/27/2010:svnLENOVO:pn2516CTO:pvrThinkPadT410:rvnLENOVO:rn2516CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2516CTO
  dmi.product.version: ThinkPad T410
  dmi.sys.vendor: LENOVO

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