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[Serge Hallyn <1388329@xxxxxxxxxxxxxxxxxx>]

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1388329

Title:
  Libvirt causes random kernel panics

Status in “libvirt” package in Ubuntu:
  New
Status in “linux” package in Ubuntu:
  New

Bug description:
  When operating in a VM through virtual machine manager I get some random kernel panics in the host related tot libvirt.
  After the panic whole libvirt hangs. This usually  happens when trying to shutdown the VM, but also during normal use. Attached to this bug report is the dmesg output. 

  [ 1805.098453] virbr0: port 1(vnet0) entered disabled state
  [ 1805.099042] device vnet0 left promiscuous mode
  [ 1805.099054] virbr0: port 1(vnet0) entered disabled state
  [ 1805.827706] audit: type=1400 audit(1414827748.381:39): apparmor="STATUS" operation="profile_remove" profile="unconfined" name="libvirt-147c7c68-d1d6-4dd0-8753-f13473e3396d" pid=8452 comm="apparmor_parser"
  [ 1805.829964] general protection fault: 0000 [#1] SMP 
  [ 1805.829967] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc vhost_net vhost macvtap macvlan rfcomm bnep binfmt_misc joydev hid_generic btusb bluetooth usbhid hid 6lowpan_iphc btrfs xor kvm_amd snd_seq_midi snd_seq_midi_event kvm snd_hda_codec_via crct10dif_pclmul snd_hda_codec_generic snd_rawmidi crc32_pclmul snd_hda_codec_hdmi ghash_clmulni_intel snd_hda_intel snd_seq snd_hda_controller snd_hda_codec aesni_intel uas snd_hwdep aes_x86_64 snd_pcm lrw gf128mul glue_helper ablk_helper snd_seq_device psmouse usb_storage cryptd sp5100_tco nvidia(POE) serio_raw edac_core i2c_piix4 edac_mce_amd snd_timer k10temp fam15h_power r8169 tpm_infineon
  [ 1805.830000]  snd mii drm soundcore mac_hid shpchp vfio_iommu_type1 vfio_pci vfio it87 hwmon_vid raid6_pq nls_iso8859_1 ahci libahci
  [ 1805.830009] CPU: 0 PID: 1602 Comm: libvirtd Tainted: P           OE 3.16.0-24-generic #32-Ubuntu
  [ 1805.830011] Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./970A-UD3P, BIOS F1 08/06/2013
  [ 1805.830013] task: ffff88044690b2f0 ti: ffff880445dec000 task.ti: ffff880445dec000
  [ 1805.830014] RIP: 0010:[<ffffffff814d88cf>]  [<ffffffff814d88cf>] __rpm_callback+0x2f/0xe0
  [ 1805.830019] RSP: 0018:ffff880445defd80  EFLAGS: 00010212
  [ 1805.830020] RAX: 0000000000000008 RBX: ffff880447c2f098 RCX: 0000000000000000
  [ 1805.830021] RDX: ffff8803d8a15368 RSI: ffff880447c2f098 RDI: ffff880447c2f098
  [ 1805.830023] RBP: ffff880445defd98 R08: 0000000023670101 R09: 0000000000000246
  [ 1805.830024] R10: ffffffffc028b148 R11: ffff880423670100 R12: 0016000000600460
  [ 1805.830025] R13: ffff880447c2f148 R14: 0000000000000000 R15: fffffffffffffff2
  [ 1805.830027] FS:  00007f4c8eeb7700(0000) GS:ffff88045ec00000(0000) knlGS:0000000000000000
  [ 1805.830028] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
  [ 1805.830029] CR2: 00007f4c801cc3d0 CR3: 0000000445df3000 CR4: 00000000000407f0
  [ 1805.830030] Stack:
  [ 1805.830031]  0000000000000004 ffff880447c2f098 0000000000000004 ffff880445defdc8
  [ 1805.830034]  ffffffff814d9c6d 0000000000000004 ffff880447c2f098 ffff880447c2f148
  [ 1805.830036]  0000000000000246 ffff880445defdf8 ffffffff814d9dbd ffff880447c2f098
  [ 1805.830038] Call Trace:
  [ 1805.830041]  [<ffffffff814d9c6d>] rpm_idle+0x1bd/0x2b0
  [ 1805.830044]  [<ffffffff814d9dbd>] __pm_runtime_idle+0x5d/0x80
  [ 1805.830048]  [<ffffffff813e36d4>] pci_device_remove+0x74/0xc0
  [ 1805.830052]  [<ffffffff814cf76f>] __device_release_driver+0x7f/0xf0
  [ 1805.830055]  [<ffffffff814cf803>] device_release_driver+0x23/0x30
  [ 1805.830058]  [<ffffffff814ceb5d>] unbind_store+0xed/0x150
  [ 1805.830061]  [<ffffffff814cd915>] drv_attr_store+0x25/0x40
  [ 1805.830064]  [<ffffffff81258eea>] sysfs_kf_write+0x3a/0x50
  [ 1805.830066]  [<ffffffff8125808e>] kernfs_fop_write+0xee/0x180
  [ 1805.830069]  [<ffffffff811e0c17>] vfs_write+0xb7/0x1f0
  [ 1805.830071]  [<ffffffff811dfd89>] ? do_sys_open+0x1b9/0x280
  [ 1805.830074]  [<ffffffff811e17c6>] SyS_write+0x46/0xb0
  [ 1805.830087]  [<ffffffff81787ced>] system_call_fastpath+0x1a/0x1f
  [ 1805.830088] Code: 90 55 48 89 e5 41 55 41 54 53 f6 86 91 01 00 00 02 49 89 fc 48 89 f3 4c 8d ae b0 00 00 00 74 2c 4c 89 ef e8 34 ef 2a 00 48 89 df <41> ff d4 f6 83 91 01 00 00 02 41 89 c4 4c 89 ef 75 77 e8 5a ea 
  [ 1805.830111] RIP  [<ffffffff814d88cf>] __rpm_callback+0x2f/0xe0
  [ 1805.830113]  RSP <ffff880445defd80>
  [ 1805.830115] ---[ end trace 1759db886910146f ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: libvirt-bin 1.2.8-0ubuntu11
  ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
  Uname: Linux 3.16.0-24-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Sat Nov  1 08:45:18 2014
  SourcePackage: libvirt
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.apparmor.d.usr.lib.libvirt.virt.aa.helper: [modified]
  modified.conffile..etc.libvirt.qemu.conf: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/qemu.conf']
  mtime.conffile..etc.apparmor.d.usr.lib.libvirt.virt.aa.helper: 2014-06-05T20:10:02.637036

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