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[Bug 1241897] Re: Regression: Losing wired connection after upgrading to 13.10

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Brad Figg <brad.figg@xxxxxxxxxxxxx>
Date: Sat, 19 Oct 2013 22:00:05 -0000
Reply-to: Bug 1241897 <1241897@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Package changed: linux-meta (Ubuntu) => linux (Ubuntu)

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https://bugs.launchpad.net/bugs/1241897

Title:
  Regression: Losing wired connection after upgrading to 13.10

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  After upgrading from 13.04, Kubuntu holds a wired connection for a few
  seconds and then drops it. I can untick "Enable networking" on the
  Network Management tray icon and then tick it again to have the
  connection back for a few seconds. That's what I'm doing right now to
  submit this question.

  
  $ lsb_release -a
  LSB Version:    core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch:core-4.1-amd64:core-4.1-noarch:security-4.0-amd64:security-4.0-noarch:security-4.1-amd64:security-4.1-noarch
  Distributor ID: Ubuntu
  Description:    Ubuntu 13.10
  Release:        13.10
  Codename:       saucy

  
  $ uname -a
  Linux balthasar 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

  
  $ sudo lshw -C network
  *-network               
         description: Ethernet interface
         product: 88E8001 Gigabit Ethernet Controller
         vendor: Marvell Technology Group Ltd.
         physical id: 14
         bus info: pci@0000:02:14.0
         logical name: eth0
         version: 13
         serial: 00:15:f2:af:bd:44
         size: 1Gbit/s
         capacity: 1Gbit/s
         width: 32 bits
         clock: 66MHz
         capabilities: pm vpd bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
         configuration: autonegotiation=on broadcast=yes driver=skge driverversion=1.14 duplex=full ip=192.168.1.101 latency=64 link=yes maxlatency=31 mingnt=23 multicast=yes port=twisted pair speed=1Gbit/s
         resources: irq:21 memory:cede4000-cede7fff ioport:c400(size=256) memory:cedc0000-ceddffff

  
  $ apt-cache policy network-manager
  network-manager:
    Installato: 0.9.8.0-0ubuntu22
    Candidato:  0.9.8.0-0ubuntu22
    Tabella versione:
   *** 0.9.8.0-0ubuntu22 0
          500 http://it.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
          100 /var/lib/dpkg/status

  $ dmesg (only relevant stuff)

  [ 6633.242742] skge 0000:02:14.0 eth0: disabling interface
  [ 6634.485208] skge 0000:02:14.0 eth0: enabling interface
  [ 6636.924409] skge 0000:02:14.0 eth0: Link is up at 1000 Mbps, full duplex, flow control both
  [ 6665.947766] skge 0000:02:14.0 eth0: disabling interface
  [ 6666.400297] skge 0000:02:14.0 eth0: enabling interface
  [ 6669.122046] skge 0000:02:14.0 eth0: Link is up at 1000 Mbps, full duplex, flow control both
  [ 6789.995899] skge 0000:02:14.0 eth0: disabling interface
  [ 6790.690512] skge 0000:02:14.0 eth0: enabling interface
  [ 6793.140683] skge 0000:02:14.0 eth0: Link is up at 1000 Mbps, full duplex, flow control both
  [ 6838.467165] skge 0000:02:14.0 eth0: disabling interface
  [ 6839.413877] skge 0000:02:14.0 eth0: enabling interface
  [ 6841.878607] skge 0000:02:14.0 eth0: Link is up at 1000 Mbps, full duplex, flow control both
  [ 6955.304511] eth0: hw csum failure
  [ 6955.304530] CPU: 0 PID: 3 Comm: ksoftirqd/0 Tainted: PF          O 3.11.0-12-generic #19-Ubuntu
  [ 6955.304535] Hardware name: System manufacturer System Product Name/A8R-MVP, BIOS 0605 12/09/2008
  [ 6955.304540]  ffff880135cff162 ffff880139b139e8 ffffffff816e547a ffff880134d66000
  [ 6955.304550]  ffff880139b13a00 ffffffff815ec43a ffff88007f724900 ffff880139b13a20
  [ 6955.304557]  ffffffff815e5422 0000000000000246 ffff88007f724900 ffff880139b13a30
  [ 6955.304565] Call Trace:
  [ 6955.304582]  [<ffffffff816e547a>] dump_stack+0x45/0x56
  [ 6955.304593]  [<ffffffff815ec43a>] netdev_rx_csum_fault+0x3a/0x40
  [ 6955.304601]  [<ffffffff815e5422>] __skb_checksum_complete_head+0x62/0x70
  [ 6955.304607]  [<ffffffff815e5441>] __skb_checksum_complete+0x11/0x20
  [ 6955.304618]  [<ffffffff8167100c>] nf_ip_checksum+0xcc/0x100
  [ 6955.304642]  [<ffffffffa0d1c8c2>] tcp_error+0x1b2/0x260 [nf_conntrack]
  [ 6955.304650]  [<ffffffff816646e6>] ? fib_table_lookup+0x2e6/0x390
  [ 6955.304665]  [<ffffffffa0d183de>] nf_conntrack_in+0xee/0xad0 [nf_conntrack]
  [ 6955.304676]  [<ffffffff8135ba9e>] ? cpumask_next_and+0x2e/0x40
  [ 6955.304684]  [<ffffffff8135ba9e>] ? cpumask_next_and+0x2e/0x40
  [ 6955.304691]  [<ffffffff8135ba9e>] ? cpumask_next_and+0x2e/0x40
  [ 6955.304701]  [<ffffffffa0d632f1>] ipv4_conntrack_in+0x21/0x30 [nf_conntrack_ipv4]
  [ 6955.304708]  [<ffffffff8161cb5b>] nf_iterate+0x8b/0xa0
  [ 6955.304716]  [<ffffffff81623030>] ? inet_del_offload+0x40/0x40
  [ 6955.304722]  [<ffffffff8161cbe4>] nf_hook_slow+0x74/0x130
  [ 6955.304729]  [<ffffffff81623030>] ? inet_del_offload+0x40/0x40
  [ 6955.304737]  [<ffffffff81623a74>] ip_rcv+0x344/0x380
  [ 6955.304744]  [<ffffffff815eec66>] __netif_receive_skb_core+0x646/0x830
  [ 6955.304750]  [<ffffffff815eee68>] __netif_receive_skb+0x18/0x60
  [ 6955.304756]  [<ffffffff815eeed3>] netif_receive_skb+0x23/0x90
  [ 6955.304762]  [<ffffffff815ef940>] napi_gro_receive+0x80/0xb0
  [ 6955.304787]  [<ffffffffa002e2e6>] skge_poll+0x3a6/0x870 [skge]
  [ 6955.304796]  [<ffffffff8101a395>] ? native_sched_clock+0x15/0x80
  [ 6955.304802]  [<ffffffff815ef20c>] net_rx_action+0x11c/0x240
  [ 6955.304811]  [<ffffffff81067397>] __do_softirq+0xf7/0x240
  [ 6955.304817]  [<ffffffff81067510>] run_ksoftirqd+0x30/0x50
  [ 6955.304827]  [<ffffffff8108cadf>] smpboot_thread_fn+0xff/0x1a0
  [ 6955.304834]  [<ffffffff8108c9e0>] ? lg_global_unlock+0x60/0x60
  [ 6955.304844]  [<ffffffff810847b0>] kthread+0xc0/0xd0
  [ 6955.304851]  [<ffffffff810846f0>] ? kthread_create_on_node+0x120/0x120
  [ 6955.304859]  [<ffffffff816f516c>] ret_from_fork+0x7c/0xb0
  [ 6955.304867]  [<ffffffff810846f0>] ? kthread_create_on_node+0x120/0x120
  [ 6960.694250] eth0: hw csum failure
  [ 6960.694268] CPU: 0 PID: 0 Comm: swapper/0 Tainted: PF          O 3.11.0-12-generic #19-Ubuntu
  [ 6960.694274] Hardware name: System manufacturer System Product Name/A8R-MVP, BIOS 0605 12/09/2008
  [ 6960.694279]  ffff8801357575e2 ffff88013fc03af0 ffffffff816e547a ffff880134d66000
  [ 6960.694288]  ffff88013fc03b08 ffffffff815ec43a ffff880134a09b00 ffff88013fc03b28
  [ 6960.694295]  ffffffff815e5422 000000003fc03b70 ffff880134a09b00 ffff88013fc03b38
  [ 6960.694303] Call Trace:
  [ 6960.694307]  <IRQ>  [<ffffffff816e547a>] dump_stack+0x45/0x56
  [ 6960.694331]  [<ffffffff815ec43a>] netdev_rx_csum_fault+0x3a/0x40
  [ 6960.694339]  [<ffffffff815e5422>] __skb_checksum_complete_head+0x62/0x70
  [ 6960.694346]  [<ffffffff815e5441>] __skb_checksum_complete+0x11/0x20
  [ 6960.694356]  [<ffffffff8167100c>] nf_ip_checksum+0xcc/0x100
  [ 6960.694380]  [<ffffffffa0d1c8c2>] tcp_error+0x1b2/0x260 [nf_conntrack]
  [ 6960.694387]  [<ffffffff815f0a28>] ? dev_hard_start_xmit+0x318/0x570
  [ 6960.694403]  [<ffffffffa0d183de>] nf_conntrack_in+0xee/0xad0 [nf_conntrack]
  [ 6960.694412]  [<ffffffff8109edfe>] ? update_group_power+0x13e/0x220
  [ 6960.694422]  [<ffffffff8135ba9e>] ? cpumask_next_and+0x2e/0x40
  [ 6960.694432]  [<ffffffffa0d632f1>] ipv4_conntrack_in+0x21/0x30 [nf_conntrack_ipv4]
  [ 6960.694439]  [<ffffffff8161cb5b>] nf_iterate+0x8b/0xa0
  [ 6960.694448]  [<ffffffff81623030>] ? inet_del_offload+0x40/0x40
  [ 6960.694454]  [<ffffffff8161cbe4>] nf_hook_slow+0x74/0x130
  [ 6960.694461]  [<ffffffff81623030>] ? inet_del_offload+0x40/0x40
  [ 6960.694468]  [<ffffffff81623a74>] ip_rcv+0x344/0x380
  [ 6960.694475]  [<ffffffff815eec66>] __netif_receive_skb_core+0x646/0x830
  [ 6960.694481]  [<ffffffff815eee68>] __netif_receive_skb+0x18/0x60
  [ 6960.694487]  [<ffffffff815eeed3>] netif_receive_skb+0x23/0x90
  [ 6960.694493]  [<ffffffff815ef940>] napi_gro_receive+0x80/0xb0
  [ 6960.694518]  [<ffffffffa002e2e6>] skge_poll+0x3a6/0x870 [skge]
  [ 6960.694525]  [<ffffffff815ef20c>] net_rx_action+0x11c/0x240
  [ 6960.694533]  [<ffffffff81067397>] __do_softirq+0xf7/0x240
  [ 6960.694539]  [<ffffffff81067675>] irq_exit+0xb5/0xc0
  [ 6960.694548]  [<ffffffff816f7516>] do_IRQ+0x56/0xc0
  [ 6960.694555]  [<ffffffff816ecb2d>] common_interrupt+0x6d/0x6d
  [ 6960.694559]  <EOI>  [<ffffffff8104d386>] ? native_safe_halt+0x6/0x10
  [ 6960.694574]  [<ffffffff8101b22f>] default_idle+0x1f/0xc0
  [ 6960.694581]  [<ffffffff8101baf6>] arch_cpu_idle+0x26/0x30
  [ 6960.694590]  [<ffffffff810b54ee>] cpu_startup_entry+0xce/0x280
  [ 6960.694598]  [<ffffffff816d4727>] rest_init+0x77/0x80
  [ 6960.694607]  [<ffffffff81d26ef7>] start_kernel+0x40a/0x416
  [ 6960.694615]  [<ffffffff81d268f6>] ? repair_env_string+0x5c/0x5c
  [ 6960.694622]  [<ffffffff81d26120>] ? early_idt_handlers+0x120/0x120
  [ 6960.694629]  [<ffffffff81d265de>] x86_64_start_reservations+0x2a/0x2c
  [ 6960.694636]  [<ffffffff81d266e8>] x86_64_start_kernel+0x108/0x117
  [ 6982.043414] skge 0000:02:14.0 eth0: disabling interface
  [ 6982.149933] skge 0000:02:14.0 eth0: enabling interface
  [ 6985.178432] skge 0000:02:14.0 eth0: Link is up at 1000 Mbps, full duplex, flow control both
  [ 7195.764345] skge 0000:02:14.0 eth0: disabling interface
  [ 7195.884590] skge 0000:02:14.0 eth0: enabling interface
  [ 7198.898305] skge 0000:02:14.0 eth0: Link is up at 1000 Mbps, full duplex, flow control both
  [ 7883.869895] eth0: hw csum failure
  [ 7883.869913] CPU: 0 PID: 0 Comm: swapper/0 Tainted: PF          O 3.11.0-12-generic #19-Ubuntu
  [ 7883.869918] Hardware name: System manufacturer System Product Name/A8R-MVP, BIOS 0605 12/09/2008
  [ 7883.869924]  ffff88004cd96a62 ffff88013fc03af0 ffffffff816e547a ffff880134d66000
  [ 7883.869933]  ffff88013fc03b08 ffffffff815ec43a ffff880136885000 ffff88013fc03b28
  [ 7883.869940]  ffffffff815e5422 0000000000000000 ffff880136885000 ffff88013fc03b38
  [ 7883.869948] Call Trace:
  [ 7883.869953]  <IRQ>  [<ffffffff816e547a>] dump_stack+0x45/0x56
  [ 7883.869977]  [<ffffffff815ec43a>] netdev_rx_csum_fault+0x3a/0x40
  [ 7883.869985]  [<ffffffff815e5422>] __skb_checksum_complete_head+0x62/0x70
  [ 7883.869992]  [<ffffffff815e5441>] __skb_checksum_complete+0x11/0x20
  [ 7883.870002]  [<ffffffff8167100c>] nf_ip_checksum+0xcc/0x100
  [ 7883.870027]  [<ffffffffa0d1c8c2>] tcp_error+0x1b2/0x260 [nf_conntrack]
  [ 7883.870036]  [<ffffffffa0d779f4>] ? __nfqnl_enqueue_packet+0x104/0x160 [nfnetlink_queue]
  [ 7883.870051]  [<ffffffffa0d183de>] nf_conntrack_in+0xee/0xad0 [nf_conntrack]
  [ 7883.870062]  [<ffffffff81626640>] ? ip_forward_options+0x1c0/0x1c0
  [ 7883.870068]  [<ffffffff8161cc22>] ? nf_hook_slow+0xb2/0x130
  [ 7883.870075]  [<ffffffff81626640>] ? ip_forward_options+0x1c0/0x1c0
  [ 7883.870084]  [<ffffffffa0d632f1>] ipv4_conntrack_in+0x21/0x30 [nf_conntrack_ipv4]
  [ 7883.870090]  [<ffffffff8161cb5b>] nf_iterate+0x8b/0xa0
  [ 7883.870098]  [<ffffffff81623030>] ? inet_del_offload+0x40/0x40
  [ 7883.870104]  [<ffffffff8161cbe4>] nf_hook_slow+0x74/0x130
  [ 7883.870111]  [<ffffffff81623030>] ? inet_del_offload+0x40/0x40
  [ 7883.870118]  [<ffffffff81623a74>] ip_rcv+0x344/0x380
  [ 7883.870125]  [<ffffffff815eec66>] __netif_receive_skb_core+0x646/0x830
  [ 7883.870131]  [<ffffffff815eee68>] __netif_receive_skb+0x18/0x60
  [ 7883.870137]  [<ffffffff815eeed3>] netif_receive_skb+0x23/0x90
  [ 7883.870144]  [<ffffffff815ef940>] napi_gro_receive+0x80/0xb0
  [ 7883.870168]  [<ffffffffa002e2e6>] skge_poll+0x3a6/0x870 [skge]
  [ 7883.870174]  [<ffffffff815ef20c>] net_rx_action+0x11c/0x240
  [ 7883.870182]  [<ffffffff81067397>] __do_softirq+0xf7/0x240
  [ 7883.870189]  [<ffffffff81067675>] irq_exit+0xb5/0xc0
  [ 7883.870197]  [<ffffffff816f7516>] do_IRQ+0x56/0xc0
  [ 7883.870205]  [<ffffffff816ecb2d>] common_interrupt+0x6d/0x6d
  [ 7883.870208]  <EOI>  [<ffffffff8104d386>] ? native_safe_halt+0x6/0x10
  [ 7883.870223]  [<ffffffff8101b22f>] default_idle+0x1f/0xc0
  [ 7883.870229]  [<ffffffff8101baf6>] arch_cpu_idle+0x26/0x30
  [ 7883.870238]  [<ffffffff810b54ee>] cpu_startup_entry+0xce/0x280
  [ 7883.870246]  [<ffffffff816d4727>] rest_init+0x77/0x80
  [ 7883.870256]  [<ffffffff81d26ef7>] start_kernel+0x40a/0x416
  [ 7883.870264]  [<ffffffff81d268f6>] ? repair_env_string+0x5c/0x5c
  [ 7883.870271]  [<ffffffff81d26120>] ? early_idt_handlers+0x120/0x120
  [ 7883.870278]  [<ffffffff81d265de>] x86_64_start_reservations+0x2a/0x2c
  [ 7883.870286]  [<ffffffff81d266e8>] x86_64_start_kernel+0x108/0x117
  [ 7902.415764] skge 0000:02:14.0 eth0: disabling interface
  [ 7903.255779] skge 0000:02:14.0 eth0: enabling interface
  [ 7905.693566] skge 0000:02:14.0 eth0: Link is up at 1000 Mbps, full duplex, flow control both
  [ 8019.404373] eth0: hw csum failure
  [ 8019.404391] CPU: 0 PID: 0 Comm: swapper/0 Tainted: PF          O 3.11.0-12-generic #19-Ubuntu
  [ 8019.404396] Hardware name: System manufacturer System Product Name/A8R-MVP, BIOS 0605 12/09/2008
  [ 8019.404401]  ffff88013748d9e2 ffff88013fc03af0 ffffffff816e547a ffff880134d66000
  [ 8019.404411]  ffff88013fc03b08 ffffffff815ec43a ffff88013598a600 ffff88013fc03b28
  [ 8019.404417]  ffffffff815e5422 00000000383e2f28 ffff88013598a600 ffff88013fc03b38
  [ 8019.404425] Call Trace:
  [ 8019.404430]  <IRQ>  [<ffffffff816e547a>] dump_stack+0x45/0x56
  [ 8019.404453]  [<ffffffff815ec43a>] netdev_rx_csum_fault+0x3a/0x40
  [ 8019.404462]  [<ffffffff815e5422>] __skb_checksum_complete_head+0x62/0x70
  [ 8019.404468]  [<ffffffff815e5441>] __skb_checksum_complete+0x11/0x20
  [ 8019.404478]  [<ffffffff8167100c>] nf_ip_checksum+0xcc/0x100
  [ 8019.404504]  [<ffffffffa0d1c8c2>] tcp_error+0x1b2/0x260 [nf_conntrack]
  [ 8019.404513]  [<ffffffff8101a395>] ? native_sched_clock+0x15/0x80
  [ 8019.404522]  [<ffffffff81091b28>] ? resched_task+0x28/0x80
  [ 8019.404537]  [<ffffffffa0d183de>] nf_conntrack_in+0xee/0xad0 [nf_conntrack]
  [ 8019.404544]  [<ffffffff810925c5>] ? check_preempt_curr+0x85/0xa0
  [ 8019.404554]  [<ffffffff8104dee9>] ? default_spin_lock_flags+0x9/0x10
  [ 8019.404562]  [<ffffffff8109484a>] ? try_to_wake_up+0x20a/0x2b0
  [ 8019.404572]  [<ffffffffa0d632f1>] ipv4_conntrack_in+0x21/0x30 [nf_conntrack_ipv4]
  [ 8019.404580]  [<ffffffff8161cb5b>] nf_iterate+0x8b/0xa0
  [ 8019.404588]  [<ffffffff81623030>] ? inet_del_offload+0x40/0x40
  [ 8019.404594]  [<ffffffff8161cbe4>] nf_hook_slow+0x74/0x130
  [ 8019.404601]  [<ffffffff81623030>] ? inet_del_offload+0x40/0x40
  [ 8019.404608]  [<ffffffff81623a74>] ip_rcv+0x344/0x380
  [ 8019.404615]  [<ffffffff815eec66>] __netif_receive_skb_core+0x646/0x830
  [ 8019.404621]  [<ffffffff815eee68>] __netif_receive_skb+0x18/0x60
  [ 8019.404627]  [<ffffffff815eeed3>] netif_receive_skb+0x23/0x90
  [ 8019.404633]  [<ffffffff815ef940>] napi_gro_receive+0x80/0xb0
  [ 8019.404659]  [<ffffffffa002e2e6>] skge_poll+0x3a6/0x870 [skge]
  [ 8019.404665]  [<ffffffff815ef20c>] net_rx_action+0x11c/0x240
  [ 8019.404673]  [<ffffffff81067397>] __do_softirq+0xf7/0x240
  [ 8019.404679]  [<ffffffff81067675>] irq_exit+0xb5/0xc0
  [ 8019.404687]  [<ffffffff816f7516>] do_IRQ+0x56/0xc0
  [ 8019.404695]  [<ffffffff816ecb2d>] common_interrupt+0x6d/0x6d
  [ 8019.404698]  <EOI>  [<ffffffff8104d386>] ? native_safe_halt+0x6/0x10
  [ 8019.404711]  [<ffffffff8101b22f>] default_idle+0x1f/0xc0
  [ 8019.404717]  [<ffffffff8101baf6>] arch_cpu_idle+0x26/0x30
  [ 8019.404726]  [<ffffffff810b54ee>] cpu_startup_entry+0xce/0x280
  [ 8019.404734]  [<ffffffff816d4727>] rest_init+0x77/0x80
  [ 8019.404743]  [<ffffffff81d26ef7>] start_kernel+0x40a/0x416
  [ 8019.404751]  [<ffffffff81d268f6>] ? repair_env_string+0x5c/0x5c
  [ 8019.404758]  [<ffffffff81d26120>] ? early_idt_handlers+0x120/0x120
  [ 8019.404765]  [<ffffffff81d265de>] x86_64_start_reservations+0x2a/0x2c
  [ 8019.404772]  [<ffffffff81d266e8>] x86_64_start_kernel+0x108/0x117
  [ 8040.634295] eth0: hw csum failure
  [ 8040.634314] CPU: 0 PID: 5992 Comm: kwin Tainted: PF          O 3.11.0-12-generic #19-Ubuntu
  [ 8040.634319] Hardware name: System manufacturer System Product Name/A8R-MVP, BIOS 0605 12/09/2008
  [ 8040.634324]  ffff88007466ac62 ffff88013fc03af0 ffffffff816e547a ffff880134d66000
  [ 8040.634334]  ffff88013fc03b08 ffffffff815ec43a ffff8800782fa100 ffff88013fc03b28
  [ 8040.634341]  ffffffff815e5422 00000000810925f9 ffff8800782fa100 ffff88013fc03b38
  [ 8040.634348] Call Trace:
  [ 8040.634353]  <IRQ>  [<ffffffff816e547a>] dump_stack+0x45/0x56
  [ 8040.634377]  [<ffffffff815ec43a>] netdev_rx_csum_fault+0x3a/0x40
  [ 8040.634385]  [<ffffffff815e5422>] __skb_checksum_complete_head+0x62/0x70
  [ 8040.634392]  [<ffffffff815e5441>] __skb_checksum_complete+0x11/0x20
  [ 8040.634402]  [<ffffffff8167100c>] nf_ip_checksum+0xcc/0x100
  [ 8040.634428]  [<ffffffffa0d1c8c2>] tcp_error+0x1b2/0x260 [nf_conntrack]
  [ 8040.634438]  [<ffffffff8109484a>] ? try_to_wake_up+0x20a/0x2b0
  [ 8040.634453]  [<ffffffffa0d183de>] nf_conntrack_in+0xee/0xad0 [nf_conntrack]
  [ 8040.634462]  [<ffffffff8109edfe>] ? update_group_power+0x13e/0x220
  [ 8040.634472]  [<ffffffff8135ba9e>] ? cpumask_next_and+0x2e/0x40
  [ 8040.634483]  [<ffffffffa0d632f1>] ipv4_conntrack_in+0x21/0x30 [nf_conntrack_ipv4]
  [ 8040.634490]  [<ffffffff8161cb5b>] nf_iterate+0x8b/0xa0
  [ 8040.634499]  [<ffffffff81623030>] ? inet_del_offload+0x40/0x40
  [ 8040.634505]  [<ffffffff8161cbe4>] nf_hook_slow+0x74/0x130
  [ 8040.634511]  [<ffffffff81623030>] ? inet_del_offload+0x40/0x40
  [ 8040.634518]  [<ffffffff81623a74>] ip_rcv+0x344/0x380
  [ 8040.634525]  [<ffffffff815eec66>] __netif_receive_skb_core+0x646/0x830
  [ 8040.634531]  [<ffffffff815eee68>] __netif_receive_skb+0x18/0x60
  [ 8040.634537]  [<ffffffff815eeed3>] netif_receive_skb+0x23/0x90
  [ 8040.634543]  [<ffffffff815ef940>] napi_gro_receive+0x80/0xb0
  [ 8040.634568]  [<ffffffffa002e2e6>] skge_poll+0x3a6/0x870 [skge]
  [ 8040.634575]  [<ffffffff8109b6a8>] ? update_curr+0x168/0x180
  [ 8040.634581]  [<ffffffff815ef20c>] net_rx_action+0x11c/0x240
  [ 8040.634589]  [<ffffffff81067397>] __do_softirq+0xf7/0x240
  [ 8040.634596]  [<ffffffff81067675>] irq_exit+0xb5/0xc0
  [ 8040.634604]  [<ffffffff816f7516>] do_IRQ+0x56/0xc0
  [ 8040.634611]  [<ffffffff816ecb2d>] common_interrupt+0x6d/0x6d
  [ 8040.634614]  <EOI>  [<ffffffff815b4fd0>] ? acpi_pm_read+0x10/0x20
  [ 8040.634630]  [<ffffffff810b7ae8>] ktime_get_ts+0x48/0xe0
  [ 8040.634639]  [<ffffffff81082cf1>] posix_ktime_get_ts+0x11/0x20
  [ 8040.634647]  [<ffffffff810841c5>] SyS_clock_gettime+0x45/0xa0
  [ 8040.634654]  [<ffffffff816f521d>] system_call_fastpath+0x1a/0x1f
  [ 8043.080363] eth0: hw csum failure
  [ 8043.080382] CPU: 0 PID: 0 Comm: swapper/0 Tainted: PF          O 3.11.0-12-generic #19-Ubuntu
  [ 8043.080387] Hardware name: System manufacturer System Product Name/A8R-MVP, BIOS 0605 12/09/2008
  [ 8043.080392]  ffff880137b6b162 ffff88013fc03af0 ffffffff816e547a ffff880134d66000
  [ 8043.080401]  ffff88013fc03b08 ffffffff815ec43a ffff880071b2d800 ffff88013fc03b28
  [ 8043.080409]  ffffffff815e5422 00000000815e0673 ffff880071b2d800 ffff88013fc03b38
  [ 8043.080416] Call Trace:
  [ 8043.080421]  <IRQ>  [<ffffffff816e547a>] dump_stack+0x45/0x56
  [ 8043.080445]  [<ffffffff815ec43a>] netdev_rx_csum_fault+0x3a/0x40
  [ 8043.080453]  [<ffffffff815e5422>] __skb_checksum_complete_head+0x62/0x70
  [ 8043.080459]  [<ffffffff815e5441>] __skb_checksum_complete+0x11/0x20
  [ 8043.080469]  [<ffffffff8167100c>] nf_ip_checksum+0xcc/0x100
  [ 8043.080495]  [<ffffffffa0d1c8c2>] tcp_error+0x1b2/0x260 [nf_conntrack]
  [ 8043.080504]  [<ffffffff815ddfe7>] ? kfree_skbmem+0x37/0x90
  [ 8043.080511]  [<ffffffff815e07da>] ? __kfree_skb+0x1a/0x20
  [ 8043.080519]  [<ffffffff8163d4c1>] ? tcp_rcv_state_process+0xac1/0xcc0
  [ 8043.080534]  [<ffffffffa0d183de>] nf_conntrack_in+0xee/0xad0 [nf_conntrack]
  [ 8043.080543]  [<ffffffff8109edfe>] ? update_group_power+0x13e/0x220
  [ 8043.080553]  [<ffffffff8135ba9e>] ? cpumask_next_and+0x2e/0x40
  [ 8043.080564]  [<ffffffffa0d632f1>] ipv4_conntrack_in+0x21/0x30 [nf_conntrack_ipv4]
  [ 8043.080571]  [<ffffffff8161cb5b>] nf_iterate+0x8b/0xa0
  [ 8043.080579]  [<ffffffff81623030>] ? inet_del_offload+0x40/0x40
  [ 8043.080585]  [<ffffffff8161cbe4>] nf_hook_slow+0x74/0x130
  [ 8043.080592]  [<ffffffff81623030>] ? inet_del_offload+0x40/0x40
  [ 8043.080599]  [<ffffffff81623a74>] ip_rcv+0x344/0x380
  [ 8043.080606]  [<ffffffff815eec66>] __netif_receive_skb_core+0x646/0x830
  [ 8043.080613]  [<ffffffff815eee68>] __netif_receive_skb+0x18/0x60
  [ 8043.080619]  [<ffffffff815eeed3>] netif_receive_skb+0x23/0x90
  [ 8043.080625]  [<ffffffff815ef940>] napi_gro_receive+0x80/0xb0
  [ 8043.080649]  [<ffffffffa002e2e6>] skge_poll+0x3a6/0x870 [skge]
  [ 8043.080659]  [<ffffffff8106aea8>] ? bin_uuid+0xd8/0x130
  [ 8043.080665]  [<ffffffff815ef20c>] net_rx_action+0x11c/0x240
  [ 8043.080672]  [<ffffffff81067397>] __do_softirq+0xf7/0x240
  [ 8043.080679]  [<ffffffff81067675>] irq_exit+0xb5/0xc0
  [ 8043.080687]  [<ffffffff816f7516>] do_IRQ+0x56/0xc0
  [ 8043.080695]  [<ffffffff816ecb2d>] common_interrupt+0x6d/0x6d
  [ 8043.080698]  <EOI>  [<ffffffff8104d386>] ? native_safe_halt+0x6/0x10
  [ 8043.080713]  [<ffffffff8101b22f>] default_idle+0x1f/0xc0
  [ 8043.080720]  [<ffffffff8101baf6>] arch_cpu_idle+0x26/0x30
  [ 8043.080729]  [<ffffffff810b54ee>] cpu_startup_entry+0xce/0x280
  [ 8043.080737]  [<ffffffff816d4727>] rest_init+0x77/0x80
  [ 8043.080746]  [<ffffffff81d26ef7>] start_kernel+0x40a/0x416
  [ 8043.080754]  [<ffffffff81d268f6>] ? repair_env_string+0x5c/0x5c
  [ 8043.080761]  [<ffffffff81d26120>] ? early_idt_handlers+0x120/0x120
  [ 8043.080768]  [<ffffffff81d265de>] x86_64_start_reservations+0x2a/0x2c
  [ 8043.080775]  [<ffffffff81d266e8>] x86_64_start_kernel+0x108/0x117

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