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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

slene, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1477842

** Package changed: linux-lts-trusty (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1477842

Title:
  BUG: unable to handle kernel NULL pointer dereference

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Here is the kernel crashed log:

  [255440.341468] BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
  [255440.341524] IP: [<ffffffff810775e8>] __next_timer_interrupt+0xd8/0x170
  [255440.341556] PGD 466cfc067 PUD 468420067 PMD 0 
  [255440.341581] Oops: 0000 [#1] SMP 
  [255440.341598] Modules linked in: netconsole configfs iptable_filter iptable_nat nf_nat_ipv4 xt_addrtype ip_tables x_tables nf_nat bridge stp llc aufs veth openvswitch vxlan ip_tunnel gre libcrc32c nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ast ttm mei_me drm_kms_helper mei drm sysimgblt sysfillrect gpio_ich syscopyarea shpchp sb_edac joydev edac_core wmi mac_hid lpc_ich ipmi_si bonding lp parport ses enclosure hid_generic usbhid hid igb dca isci i2c_algo_bit mpt2sas libsas ptp ahci libahci scsi_transport_sas raid_class pps_core
  [255440.341880] CPU: 6 PID: 0 Comm: swapper/6 Tainted: G        W     3.13.0-57-generic #95~precise1-Ubuntu
  [255440.341908] Hardware name: Inspur NF5270M3/NF5270M3, BIOS CHEETAH_2.1.6 02/24/2014
  [255440.341932] task: ffff880869a3b000 ti: ffff880469ed8000 task.ti: ffff880469ed8000
  [255440.341956] RIP: 0010:[<ffffffff810775e8>]  [<ffffffff810775e8>] __next_timer_interrupt+0xd8/0x170
  [255440.341987] RSP: 0018:ffff880469ed9d68  EFLAGS: 00010082
  [255440.342005] RAX: 0000000000000000 RBX: 000000000103ccee RCX: 0000000000000000
  [255440.342028] RDX: 0000000000000000 RSI: ffff880869b59308 RDI: 000000000000002e
  [255440.342049] RBP: ffff880469ed9d98 R08: 0000000000000001 R09: 000000000000002e
  [255440.342070] R10: ffff880869b59028 R11: 0000000000000000 R12: 0000000000000040
  [255440.342092] R13: 0000000143ccedfb R14: ffff880869b58000 R15: 0000000007e7081e
  [255440.342114] FS:  0000000000000000(0000) GS:ffff88087fc00000(0000) knlGS:0000000000000000
  [255440.342137] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [255440.342157] CR2: 0000000000000018 CR3: 0000000036946000 CR4: 00000000001407e0
  [255440.342178] Stack:
  [255440.342187]  ffff880869b59028 ffff880869b59428 ffff880869b59828 ffff880869b59c28
  [255440.342221]  0000000103ccedfc 0000000103ccedfc ffff880469ed9de8 ffffffff8107a272
  [255440.342884]  ffff880469ed9e08 ffffffff8101359a ffff880469ed9de8 ffff8802757f4ce8
  [255440.343525] Call Trace:
  [255440.344159]  [<ffffffff8107a272>] get_next_timer_interrupt+0xa2/0x130
  [255440.344796]  [<ffffffff8101359a>] ? __switch_to+0xea/0x4e0
  [255440.345419]  [<ffffffff810dcccd>] tick_nohz_stop_sched_tick+0x1fd/0x360
  [255440.346070]  [<ffffffff810a365e>] ? post_schedule_idle+0xe/0x10
  [255440.346710]  [<ffffffff810dceba>] __tick_nohz_idle_enter+0x8a/0xc0
  [255440.347357]  [<ffffffff810dd13d>] tick_nohz_idle_enter+0x3d/0x70
  [255440.348003]  [<ffffffff810c4056>] cpu_idle_loop+0x36/0x270
  [255440.348654]  [<ffffffff810d9c62>] ? clockevents_register_device+0xe2/0x140
  [255440.349306]  [<ffffffff810c42fb>] cpu_startup_entry+0x6b/0x70
  [255440.349955]  [<ffffffff8104485d>] start_secondary+0xcd/0xd0
  [255440.350598] Code: 7d e8 48 89 55 e0 41 89 d9 41 83 e1 3f 44 89 cf 0f 1f 00 48 63 f7 48 c1 e6 04 4c 01 d6 48 8b 16 48 39 f2 74 25 66 0f 1f 44 00 00 <f6> 42 18 01 75 11 48 8b 4a 10 41 b8 01 00 00 00 48 39 c1 48 0f 
  [255440.352114] RIP  [<ffffffff810775e8>] __next_timer_interrupt+0xd8/0x170
  [255440.352811]  RSP <ffff880469ed9d68>
  [255440.353499] CR2: 0000000000000018

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.13.0-57-generic 3.13.0-57.95~precise1
  ProcVersionSignature: Ubuntu 3.13.0-57.95~precise1-generic 3.13.11-ckt21
  Uname: Linux 3.13.0-57-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  Date: Fri Jul 24 13:49:19 2015
  InstallationMedia: Ubuntu-Server 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120817.3)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: linux-lts-trusty
  UpgradeStatus: No upgrade log present (probably fresh install)

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