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[Launchpad Bug Tracker <1614953@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu Xenial) because there has been no activity
for 60 days.]

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

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https://bugs.launchpad.net/bugs/1614953

Title:
  hw csum failure when IPv6 interfaces configured in
  netdev_rx_csum_fault+0x38/0x40

Status in linux package in Ubuntu:
  Expired
Status in linux source package in Xenial:
  Expired
Status in linux source package in Yakkety:
  Expired

Bug description:
  Since I started using IPv6 I noticed the following kernel error:

  Thu Aug 18 15:05:01 2016] <unknown>: hw csum failure
  [Thu Aug 18 15:05:01 2016] CPU: 5 PID: 11086 Comm: Chrome_IOThread Tainted: P           OE   4.4.0-34-generic #53-Ubuntu
  [Thu Aug 18 15:05:01 2016] Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./Z77-D3H, BIOS F22 11/14/2013
  [Thu Aug 18 15:05:01 2016]  0000000000000286 00000000c05989f2 ffff8807573dfcd0 ffffffff813f11b3
  [Thu Aug 18 15:05:01 2016]  0000000000000000 0000000000000008 ffff8807573dfce8 ffffffff8171f6e8
  [Thu Aug 18 15:05:01 2016]  0000000000000074 ffff8807573dfd30 ffffffff8171639b 00000000fe091360
  [Thu Aug 18 15:05:01 2016] Call Trace:
  [Thu Aug 18 15:05:01 2016]  [<ffffffff813f11b3>] dump_stack+0x63/0x90
  [Thu Aug 18 15:05:01 2016]  [<ffffffff8171f6e8>] netdev_rx_csum_fault+0x38/0x40
  [Thu Aug 18 15:05:01 2016]  [<ffffffff8171639b>] skb_copy_and_csum_datagram_msg+0xeb/0x100
  [Thu Aug 18 15:05:01 2016]  [<ffffffff817ec0b3>] udpv6_recvmsg+0x233/0x670
  [Thu Aug 18 15:05:01 2016]  [<ffffffff8179dc4e>] inet_recvmsg+0x7e/0xb0
  [Thu Aug 18 15:05:01 2016]  [<ffffffff817061fb>] sock_recvmsg+0x3b/0x50
  [Thu Aug 18 15:05:01 2016]  [<ffffffff81706451>] SYSC_recvfrom+0xe1/0x160
  [Thu Aug 18 15:05:01 2016]  [<ffffffff810ac0b0>] ? wake_up_q+0x70/0x70
  [Thu Aug 18 15:05:01 2016]  [<ffffffff8170785e>] SyS_recvfrom+0xe/0x10
  [Thu Aug 18 15:05:01 2016]  [<ffffffff8182def2>] entry_SYSCALL_64_fastpath+0x16/0x71

  It repeats periodically:

  $ dmesg -T | grep 'hw csum failure' | wc -l
  201

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-34-generic 4.4.0-34.53
  ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
  Uname: Linux 4.4.0-34-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl nvidia_uvm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Aug 19 13:47:54 2016
  HibernationDevice: RESUME=UUID=066c8903-7f5e-43d5-b48f-76d33c4558f2
  InstallationDate: Installed on 2016-04-24 (116 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-34-generic.efi.signed root=/dev/mapper/rootpool-rootvol ro intel_iommu=on
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-34-generic N/A
   linux-backports-modules-4.4.0-34-generic  N/A
   linux-firmware                            1.157.3
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/14/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F22
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: Z77-D3H
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF22:bd11/14/2013:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ77-D3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To be filled by O.E.M.
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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