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apport information

** Attachment added: "BootDmesg.txt"
   https://bugs.launchpad.net/bugs/1333913/+attachment/4138493/+files/BootDmesg.txt

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Title:
  Kernel panics on br_nf_pre_routing_finish_bridge with atl1c driver

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I'm building custom router based on Ubuntu Server. With
  bridging/routing enabled I've encountered kernel panic (several times
  in row with neither visible reason nor specific timings) in
  br_nf_pre_routing_finish_bridge with atl1c driver loaded.

  The bridge br0 consists of 1 port (eth0), which is the following
  network card:

  05:00.0 Ethernet controller: Qualcomm Atheros AR8151 v2.0 Gigabit
  Ethernet (rev c0)

  It is driven by atl1c module. The network behind this card is NAT'ed.

  Kernel panic photo and lspci output are attached to this report. With
  different network card everything works OK.

  Extra info:

  pf@asgard:~$ uname -a
  Linux asgard 3.13.0-30-generic #54-Ubuntu SMP Mon Jun 9 22:45:01 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

  pf@asgard:~$ cat /etc/lsb-release 
  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=14.04
  DISTRIB_CODENAME=trusty
  DISTRIB_DESCRIPTION="Ubuntu 14.04 LTS"
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.13.0-30-generic.
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D2', '/dev/snd/hwC0D3', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D2c', '/dev/snd/pcmC0D3p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info: Error: [Errno 2] No such file or directory
  Card0.Amixer.values: Error: [Errno 2] No such file or directory
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=/dev/mapper/system-swap
  InstallationDate: Installed on 2014-06-20 (4 days ago)
  InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  Lsusb:
   Bus 002 Device 003: ID 046d:c31c Logitech, Inc. Keyboard K120 for Business
   Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Gigabyte Technology Co., Ltd. H61M-D2H
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-30-generic root=/dev/mapper/system-root ro nomdmonddf nomdmonisw nomdmonddf nomdmonisw
  ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-30-generic N/A
   linux-backports-modules-3.13.0-30-generic  N/A
   linux-firmware                             1.127.3
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  trusty
  Uname: Linux 3.13.0-30-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 09/05/2011
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F1
  dmi.board.name: H61M-D2H
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF1:bd09/05/2011:svnGigabyteTechnologyCo.,Ltd.:pnH61M-D2H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnH61M-D2H:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: H61M-D2H
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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