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[Bug Watch Updater <1651199@xxxxxxxxxxxxxxxxxx>]

** Changed in: linux
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1651199

Title:
  16.04 - Kernel panic on docker server

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Xenial:
  Confirmed

Bug description:
  [31016.057405] BUG: unable to handle kernel paging request at ffff82c4801e6bda
  [31016.061249] IP: [<ffffffff814d4ac3>] __xen_evtchn_do_upcall+0x43/0x80
  [31016.061380] PGD 0 
  [31016.061380] Oops: 0010 [#1] SMP 
  [31016.061380] Modules linked in: binfmt_misc xt_REDIRECT nf_nat_redirect veth xt_comment xt_mark ipt_MASQUERADE nf_nat_masquerade_ipv4 xfrm_user xfrm_algo xt_addrtype iptable_filter xt_conntrack br_netfilter bridge stp llc overlay xt_nat xt_tcpudp iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables isofs ppdev serio_raw parport_pc parport ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd ixgbevf psmouse floppy
  [31016.061380] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 4.4.0-53-generic #74-Ubuntu
  [31016.061380] Hardware name: Xen HVM domU, BIOS 4.2.amazon 11/11/2016
  [31016.061380] task: ffff880406496040 ti: ffff8804064e0000 task.ti: ffff8804064e0000
  [31016.061380] RIP: 0010:[<ffffffff814d4ac3>]  [<ffffffff814d4ac3>] __xen_evtchn_do_upcall+0x43/0x80
  [31016.061380] RSP: 0018:ffff88040fc43f78  EFLAGS: 00010082
  [31016.061380] RAX: 0000000000000000 RBX: ffff88040fc4b840 RCX: 0000000000000001
  [31016.061380] RDX: fffffffffffffffe RSI: 00000000000123a0 RDI: ffff88040fc43f30
  [31016.061380] RBP: ffff88040fc43f90 R08: 000000000000f24a R09: 0000000000000001
  [31016.061380] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
  [31016.061380] R13: 0000000000000003 R14: 0000000000000000 R15: ffff8804064e0000
  [31016.178419] FS:  0000000000000000(0000) GS:ffff88040fc40000(0000) knlGS:0000000000000000
  [31016.178419] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [31016.178419] CR2: ffff82c4801e6bda CR3: 0000000204f2f000 CR4: 00000000001406e0
  [31016.178419] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  [31016.178419] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  [31016.178419] Stack:
  [31016.178419]  0000000000000000 0000000000000003 0000000000000000 ffff88040fc43fa8
  [31016.178419]  ffffffff814d6bc0 ffffffff81f36a00 ffff8804064e3e90 ffffffff81837f32
  [31016.178419]  ffff8804064e3de8 <EOI>  ffff8804064e0000 0000000000000000 0000000000000000
  [31016.178419] Call Trace:
  [31016.178419]  <IRQ> 
  [31016.178419]  [<ffffffff814d6bc0>] xen_evtchn_do_upcall+0x30/0x40
  [31016.178419]  [<ffffffff81837f32>] xen_hvm_callback_vector+0x82/0x90
  [31016.178419]  <EOI> 
  [31016.178419]  [<ffffffff810645d6>] ? native_safe_halt+0x6/0x10
  [31016.178419]  [<ffffffff81038d7e>] default_idle+0x1e/0xe0
  [31016.239315]  [<ffffffff8103958f>] arch_cpu_idle+0xf/0x20
  [31016.239899]  [<ffffffff810c41ba>] default_idle_call+0x2a/0x40
  [31016.239899]  [<ffffffff810c4521>] cpu_startup_entry+0x2f1/0x350
  [31016.239899]  [<ffffffff81051714>] start_secondary+0x154/0x190
  [31016.239899] Code: 01 00 00 00 65 44 8b 2d dc 56 b3 7e c6 03 00 44 89 e0 65 0f c1 05 2e d8 b3 7e 85 c0 75 35 48 8b 05 63 ce d0 00 44 89 ef ff 50 50 <9c> 58 0f 1f 44 00 00 f6 c4 02 75 23 65 8b 05 0a d8 b3 7e 65 c7 
  [31016.239899] RIP  [<ffffffff814d4ac3>] __xen_evtchn_do_upcall+0x43/0x80
  [31016.239899]  RSP <ffff88040fc43f78>
  [31016.239899] CR2: ffff82c4801e6bda
  [31016.239899] ---[ end trace 5b3e8ea32013e327 ]---
  [31016.239899] Kernel panic - not syncing: Fatal exception in interrupt
  [31016.239899] Kernel Offset: disabled

  
  We believe this appeared in the last 1-2mo of releases, since this started happening after we did a `apt-get upgrade` on our machines after a bit of a pause. These are EC2 m4.xlarge servers running Ubuntu 16.04.1. They are Kubernetes minions, so I assume docker is likely the trigger.

  Unfortunately there aren't really any interesting logs in journalctl
  from the previous boot prior to the panic.

  Let me know what I can do to debug further.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-53-generic 4.4.0-53.74
  ProcVersionSignature: Ubuntu 4.4.0-53.74-generic 4.4.30
  Uname: Linux 4.4.0-53-generic x86_64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Dec 19 15:56 seq
   crw-rw---- 1 root audio 116, 33 Dec 19 15:56 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.20.1-0ubuntu2.4
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: N/A
  Date: Mon Dec 19 18:12:12 2016
  Ec2AMI: ami-f1ca1091
  Ec2AMIManifest: (unknown)
  Ec2AvailabilityZone: us-west-2c
  Ec2InstanceType: m4.xlarge
  Ec2Kernel: unavailable
  Ec2Ramdisk: unavailable
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  JournalErrors:
   Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
         Users in the 'systemd-journal' group can see all messages. Pass -q to
         turn off this notice.
   No journal files were opened due to insufficient permissions.
  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  MachineType: Xen HVM domU
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-53-generic root=UUID=6a0a7342-52da-46ce-af2a-92daf9df2224 ro console=tty1 console=ttyS0
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-53-generic N/A
   linux-backports-modules-4.4.0-53-generic  N/A
   linux-firmware                            N/A
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  WifiSyslog:
   
  dmi.bios.date: 11/11/2016
  dmi.bios.vendor: Xen
  dmi.bios.version: 4.2.amazon
  dmi.chassis.type: 1
  dmi.chassis.vendor: Xen
  dmi.modalias: dmi:bvnXen:bvr4.2.amazon:bd11/11/2016:svnXen:pnHVMdomU:pvr4.2.amazon:cvnXen:ct1:cvr:
  dmi.product.name: HVM domU
  dmi.product.version: 4.2.amazon
  dmi.sys.vendor: Xen

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