[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[RaindyLong]

Same output on 4.10.0-42：

Jul 20 16:04:19 ubuntu kernel: [832874.880924]  nf_hook_slow+0x2a/0xb0
Jul 20 16:04:19 ubuntu kernel: [832874.880926]  ? __dev_queue_xmit+0x276/0x690
Jul 20 16:04:19 ubuntu kernel: [832874.880928]  br_forward_finish+0x83/0xb0 
[bridge]
Jul 20 16:04:19 ubuntu kernel: [832874.880931]  ? 
br_fdb_external_learn_del+0x120/0x120 [bridge]
Jul 20 16:04:19 ubuntu kernel: [832874.880932]  br_nf_hook_thresh+0xac/0xc0 
[br_netfilter]
Jul 20 16:04:19 ubuntu kernel: [832874.880934]  ? skb_free_head+0x21/0x30
Jul 20 16:04:19 ubuntu kernel: [832874.880935]  br_nf_forward_finish+0xe0/0x1b0 
[br_netfilter]
Jul 20 16:04:19 ubuntu kernel: [832874.880938]  ? 
br_dev_queue_push_xmit+0x150/0x150 [bridge]
Jul 20 16:04:19 ubuntu kernel: [832874.880939]  br_nf_forward_ip+0x378/0x450 
[br_netfilter]
Jul 20 16:04:19 ubuntu kernel: [832874.880946]  ? tcp_in_window+0x109/0xa00 
[nf_conntrack]
Jul 20 16:04:19 ubuntu kernel: [832874.880947]  nf_hook_slow+0x2a/0xb0
Jul 20 16:04:19 ubuntu kernel: [832874.880950]  __br_forward+0xc6/0x1e0 [bridge]
Jul 20 16:04:19 ubuntu kernel: [832874.880953]  ? 
br_dev_queue_push_xmit+0x150/0x150 [bridge]
Jul 20 16:04:19 ubuntu kernel: [832874.880955]  br_forward+0xa7/0xb0 [bridge]
Jul 20 16:04:19 ubuntu kernel: [832874.880958]  
br_handle_frame_finish+0x263/0x540 [bridge]
Jul 20 16:04:19 ubuntu kernel: [832874.880961]  ? udp_error+0xe2/0x1e0 
[nf_conntrack]
Jul 20 16:04:19 ubuntu kernel: [832874.880964]  ? br_pass_frame_up+0x150/0x150 
[bridge]
Jul 20 16:04:19 ubuntu kernel: [832874.880965]  br_nf_hook_thresh+0xac/0xc0 
[br_netfilter]
Jul 20 16:04:19 ubuntu kernel: [832874.880967]  
br_nf_pre_routing_finish+0x196/0x330 [br_netfilter]
Jul 20 16:04:19 ubuntu kernel: [832874.880970]  ? br_pass_frame_up+0x150/0x150 
[bridge]
Jul 20 16:04:19 ubuntu kernel: [832874.880972]  ? ipv4_conntrack_in+0x1c/0x20 
[nf_conntrack_ipv4]
Jul 20 16:04:19 ubuntu kernel: [832874.880973]  br_nf_pre_routing+0x2d6/0x430 
[br_netfilter]
Jul 20 16:04:19 ubuntu kernel: [832874.880974]  ? br_nf_forward_arp+0x260/0x260 
[br_netfilter]
Jul 20 16:04:19 ubuntu kernel: [832874.880976]  nf_hook_slow+0x2a/0xb0
Jul 20 16:04:19 ubuntu kernel: [832874.880978]  br_handle_frame+0x1bc/0x2d0 
[bridge]
Jul 20 16:04:19 ubuntu kernel: [832874.880981]  ? br_pass_frame_up+0x150/0x150 
[bridge]
Jul 20 16:04:19 ubuntu kernel: [832874.880982]  
__netif_receive_skb_core+0x323/0xa70
Jul 20 16:04:19 ubuntu kernel: [832874.880984]  __netif_receive_skb+0x18/0x60
Jul 20 16:04:19 ubuntu kernel: [832874.880985]  process_backlog+0x9f/0x140
Jul 20 16:04:19 ubuntu kernel: [832874.880987]  net_rx_action+0x23e/0x390
Jul 20 16:04:19 ubuntu kernel: [832874.880989]  __do_softirq+0xed/0x297
Jul 20 16:04:19 ubuntu kernel: [832874.880991]  do_softirq_own_stack+0x1c/0x30
Jul 20 16:04:19 ubuntu kernel: [832874.880991]  
Jul 20 16:04:19 ubuntu kernel: [832874.880993]  do_softirq.part.18+0x41/0x50
Jul 20 16:04:19 ubuntu kernel: [832874.880994]  __local_bh_enable_ip+0x7d/0x80
Jul 20 16:04:19 ubuntu kernel: [832874.880995]  ip_finish_output2+0x193/0x390
Jul 20 16:04:19 ubuntu kernel: [832874.880997]  ip_finish_output+0x176/0x270
Jul 20 16:04:19 ubuntu kernel: [832874.880998]  ip_output+0x76/0xe0
Jul 20 16:04:19 ubuntu kernel: [832874.880999]  ? 
ip_fragment.constprop.50+0x80/0x80
Jul 20 16:04:19 ubuntu kernel: [832874.881000]  ip_local_out+0x35/0x40
Jul 20 16:04:19 ubuntu kernel: [832874.881001]  ip_send_skb+0x19/0x40
Jul 20 16:04:19 ubuntu kernel: [832874.881002]  udp_send_skb+0xae/0x280
Jul 20 16:04:19 ubuntu kernel: [832874.881003]  udp_sendmsg+0x357/0x9c0
Jul 20 16:04:19 ubuntu kernel: [832874.881005]  ? ip_reply_glue_bits+0x50/0x50
Jul 20 16:04:19 ubuntu kernel: [832874.881007]  ? aa_sock_msg_perm+0x61/0x150
Jul 20 16:04:19 ubuntu kernel: [832874.881009]  inet_sendmsg+0x31/0xb0
Jul 20 16:04:19 ubuntu kernel: [832874.881010]  sock_sendmsg+0x38/0x50
Jul 20 16:04:19 ubuntu kernel: [832874.881012]  SYSC_sendto+0x101/0x190
Jul 20 16:04:19 ubuntu kernel: [832874.881014]  ? 
syscall_trace_enter+0x298/0x2f0
Jul 20 16:04:19 ubuntu kernel: [832874.881015]  SyS_sendto+0xe/0x10
Jul 20 16:04:19 ubuntu kernel: [832874.881016]  do_syscall_64+0x5b/0xc0
Jul 20 16:04:19 ubuntu kernel: [832874.881018]  
entry_SYSCALL64_slow_path+0x25/0x25
Jul 20 16:04:19 ubuntu kernel: [832874.881019] RIP: 0033:0x7fba4961cad3
Jul 20 16:04:19 ubuntu kernel: [832874.881020] RSP: 002b:7fb9def7e960 
EFLAGS: 0293 ORIG_RAX: 002c
Jul 20 16:04:19 ubuntu kernel: [832874.881021] RAX: ffda RBX: 
7fba06103a50 RCX: 7fba4961cad3
Jul 20 16:04:19 ubuntu kernel: [832874.881022] RDX: 0cda RSI: 
7fba4a30007f RDI: 000f
Jul 20 16:04:19 ubuntu kernel: [832874.881022] RBP: 0cda R08: 
7fb9def7e9c0 R09: 0010
Jul 20 16:04:19 ubuntu kernel: [832874.881023] R10:  R11: 
0293 R12: fff9
Jul 20 16:04:19 ubuntu kernel: [832874.881024] R13: 7fba4a30007f R14: 
7fba061037d0 

[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

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

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

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  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

I built a test kernel with commit b2504a5dbef3305ef41988ad270b0e8ec289331c 
reverted.  

The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1715609

Note, to test this kernel, you need to install both the linux-image and
linux-image-extra .deb packages.


It might also be worth testing the latest mainline kernel, to see if this bug 
was fixed another way.  That kernel can be downloaded from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.16/


Thanks in advance!

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Junien Fridrick]

Hi,

I got this on 4.4.0-116-generic :

[266447.178906] [ cut here ]
[266447.178919] WARNING: CPU: 0 PID: 3343 at 
/build/linux-fQ94TU/linux-4.4.0/net/core/dev.c:2448 
skb_warn_bad_offload+0xd1/0x120()
[266447.178924] qr-8a4bd2f3-04: caps=(0x0184075b59e9, 0x0184075b59e9) 
len=2058 data_len=582 gso_size=1406 gso_type=1 ip_summed=3
[266447.178926] Modules linked in: 
kpatch_livepatch_Ubuntu_4_4_0_116_140_generic_36(OE) xt_REDIRECT 
nf_nat_redirect ip6table_mangle xt_nat xt_mark xt_connmark ip6table_raw 
iptable_raw ip_gre ip_tunnel gre xt_recent ip6t_REJECT nf_reject_ipv6 
nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 ipt_REJECT nf_reject_ipv4 
nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_addrtype xt_conntrack dccp_diag 
dccp tcp_diag udp_diag inet_diag unix_diag veth netlink_diag nbd 
ip6table_filter ip6_tables xt_CHECKSUM iptable_mangle xt_tcpudp ipt_MASQUERADE 
nf_nat_masquerade_ipv4 xt_comment iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 
nf_nat_ipv4 nf_nat iptable_filter ip_tables x_tables openvswitch nf_defrag_ipv6 
nf_conntrack binfmt_misc ipmi_ssif intel_rapl x86_pkg_temp_thermal 
intel_powerclamp coretemp kvm_intel bridge stp kvm llc
[266447.178988]  irqbypass sb_edac edac_core ipmi_si hpilo ipmi_msghandler 
serio_raw 8250_fintek lpc_ich shpchp acpi_power_meter ioatdma mac_hid dca 
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 psmouse tg3 ptp pps_core 
hpsa scsi_transport_sas wmi fjes
[266447.179045] CPU: 0 PID: 3343 Comm: haproxy Tainted: GW  OE K 
4.4.0-116-generic #140-Ubuntu
[266447.179048] Hardware name: HP ProLiant DL360 Gen9/ProLiant DL360 Gen9, BIOS 
P89 01/22/2018
[266447.179050]  0286 6f5737dc927d16dd 880a3646b818 
813ffc13
[266447.179055]  880a3646b860 81d715e8 880a3646b850 
810830f2
[266447.179059]  880064507ce8 880b4ff12000 0001 
8808723268fc
[266447.179064] Call Trace:
[266447.179072]  [] dump_stack+0x63/0x90
[266447.179079]  [] warn_slowpath_common+0x82/0xc0
[266447.179084]  [] warn_slowpath_fmt+0x5c/0x80
[266447.179090]  [] ? ___ratelimit+0xa2/0xe0
[266447.179094]  [] skb_warn_bad_offload+0xd1/0x120
[266447.179100]  [] skb_checksum_help+0x185/0x1a0
[266447.179106]  [] checksum_tg+0x22/0x29 [xt_CHECKSUM]
[266447.179112]  [] ipt_do_table+0x301/0x720 [ip_tables]
[266447.179117]  [] ? ipt_do_table+0x349/0x720 [ip_tables]
[266447.179122]  [] ? enqueue_entity+0x3a7/0xd20
[266447.179129]  [] iptable_mangle_hook+0x39/0x107 
[iptable_mangle]
[266447.179134]  [] nf_iterate+0x68/0x80
[266447.179137]  [] nf_hook_slow+0x73/0xd0
[266447.179143]  [] ip_output+0xcf/0xe0
[266447.179148]  [] ? 
__ip_flush_pending_frames.isra.42+0x90/0x90
[266447.179153]  [] ip_local_out+0x3b/0x50
[266447.179158]  [] ip_queue_xmit+0x154/0x380
[266447.179164]  [] tcp_transmit_skb+0x51b/0x980
[266447.179169]  [] tcp_write_xmit+0x1d6/0xf40
[266447.179174]  [] __tcp_push_pending_frames+0x31/0xd0
[266447.179178]  [] tcp_push+0xec/0x110
[266447.179181]  [] tcp_sendmsg+0x739/0xb80
[266447.179186]  [] inet_sendmsg+0x6b/0xa0
[266447.179192]  [] sock_sendmsg+0x3e/0x50
[266447.179196]  [] SYSC_sendto+0x101/0x190
[266447.179203]  [] ? syscall_trace_enter_phase1+0xc8/0x140
[266447.179208]  [] SyS_sendto+0xe/0x10
[266447.179215]  [] entry_SYSCALL_64_fastpath+0x1c/0xbb
[266447.179218] ---[ end trace 4c054fa8d617289c ]---


Joseph, can we maybe get a new kernel to test ? The one in your last comment is 
gone.

Note that this isn't appearing a lot (~10 occurrences on a server with 3
days of uptime)

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

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

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  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

** No longer affects: linux (Ubuntu Zesty)

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

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

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  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Luca Lazzeroni]

I can confirm the bug is still present in 4.10.0-42. I can experience it
with LinPhone working on a VLAN defined on an igb managed card.

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  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Giedrius Stalioraitis]

Just a note that I'm seeing far less skb_warn_bad_offload warnings in
Xenial with the last 3 or 4 official 4.10 kernels (4.10.0-42, 4.10.0-40,
4.10.0-38, etc). Sometimes I don't see any warnings for a week or so,
sometimes a few pop out. So it looks much better now, I'm just not sure
it is fixed completely.

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  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

Can those affected by this bug give the following kernel a try:
http://kernel.ubuntu.com/~jsalisbury/lp1715609/

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

Comment #20 is the message sent upstream.

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  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

I requested feedback from upstream regarding this bug.  I will update
the bug as soon as there is anything new.

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  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Kevin Carter]

I'm still seeing this in the latest 4.10, 4.11, 4.13 and 4.15 (from
mainline).


Dec 10 23:09:05 infra1 kernel: [  571.226805] RIP: 
0010:skb_warn_bad_offload+0xb7/0xf0
Dec 10 23:09:05 infra1 kernel: [  571.226810] FS:  () 
GS:97c25eb8() knlGS:
Dec 10 23:09:05 infra1 kernel: [  571.226818]  ipt_do_table+0x2eb/0x5f0 
[ip_tables]
Dec 10 23:09:05 infra1 kernel: [  571.226829]  nf_hook_slow+0x42/0xb0
Dec 10 23:09:05 infra1 kernel: [  571.226849]  ? 
br_dev_queue_push_xmit+0x140/0x140 [bridge]
Dec 10 23:09:05 infra1 kernel: [  571.226866]  
br_handle_frame_finish+0x2a4/0x540 [bridge]
Dec 10 23:09:05 infra1 kernel: [  571.226881]  ? iptable_nat_ipv4_in+0x15/0x20 
[iptable_nat]
Dec 10 23:09:05 infra1 kernel: [  571.226895]  __netif_receive_skb+0x18/0x60
Dec 10 23:09:05 infra1 kernel: [  571.226906]  common_interrupt+0x93/0x93
Dec 10 23:09:05 infra1 kernel: [  571.226912] R10: bc4f00cf3e40 R11: 
012b R12: 97c25eba4e30
Dec 10 23:09:05 infra1 kernel: [  571.226921]  secondary_startup_64+0xa5/0xa5

Dec 10 23:09:15 infra1 kernel: [  582.507590] CPU: 0 PID: 20250 Comm: apache2 
Tainted: GW   4.14.5-041405-generic #201712101332   

   
Dec 10 23:09:15 infra1 kernel: [  582.507595] RBP: 97c25ea036e0 R08: 
0001 R09: 0c10  


Dec 10 23:09:15 infra1 kernel: [  582.507599] Call Trace:   


 
Dec 10 23:09:15 infra1 kernel: [  582.507610]  iptable_mangle_hook+0x37/0x110 
[iptable_mangle]

   
Dec 10 23:09:15 infra1 kernel: [  582.507622]  br_forward_finish+0x9d/0xb0 
[bridge]

  
Dec 10 23:09:15 infra1 kernel: [  582.507631]  br_nf_forward_ip+0x30c/0x430 
[br_netfilter]  

 
Dec 10 23:09:15 infra1 kernel: [  582.507641]  br_forward+0x97/0xa0 [bridge]


 
Dec 10 23:09:15 infra1 kernel: [  582.507650]  ? br_pass_frame_up+0x150/0x150 
[bridge]

   
Dec 10 23:09:15 infra1 kernel: [  582.507659]  br_handle_frame+0x1ec/0x300 
[bridge]

  
Dec 10 23:09:15 infra1 kernel: [  582.507667]  net_rx_action+0x13b/0x380


 
Dec 10 23:09:15 infra1 kernel: [  582.507678]  ip_finish_output2+0x172/0x3a0


 
Dec 10 23:09:15 infra1 kernel: [  582.507684]  ip_local_out+0x35/0x40   


 
Dec 10 23:09:15 infra1 kernel: [  582.507692]  tcp_sendmsg_locked+0xb4c/0xe90   


 
Dec 10 23:09:15 infra1 kernel: [  582.507699]  do_iter_write+0x86/0x190 


 
Dec 10 23:09:15 infra1 kernel: [  582.507708]  do_syscall_64+0x61/0x120 


 
Dec 10 23:09:15 infra1 kernel: [  582.507712] RBP: 7f906c1800b0 R08: 

[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Jeff Billimek]

Seeing this in

Linux andor 4.10.0-37-generic #41-Ubuntu SMP Fri Oct 6 20:20:37 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux

as well

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  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Robert Dinse]

This bug also affects the low-latency kernel Linux iglulik
4.10.0-37-lowlatency #41-Ubuntu SMP PREEMPT Fri Oct 6 21:30:07 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux and you can make that four people that
are affected.

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  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

Can you also give the mainline kernel a test?  A link to it is posted in
comment #13.

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  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Jo Vanvoorden]

Booted the test kernel and so far no more warnings

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

It might also be good to test the latest mainline kernel.  This will
tell us if this commit needs to be reverted, or if there are other
commits in mainline that might be needed in combination with
b2504a5dbef.

The latest mainline kernel can be downloaded from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.14-rc1/

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

@jo Vanvoorden,

A Xenial 4.4 based test kernel has been built with a revert of commit
b2504a5dbe.

The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1715609/xenial

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Changed in: linux (Ubuntu Xenial)
   Status: New => In Progress

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

** Changed in: linux (Ubuntu Xenial)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Jo Vanvoorden]

Can you also build an update for the 4.4.0-93 kernel ?

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Giedrius Stalioraitis]

Joseph, I've been running your test kernel since yesterday. Looking
good, no skb_warn_bad_offload warnings so far. With the original kernel
I was getting hundreds of these warnings every day.

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Pavel Oskov]

Also reproduced on:
Linux node-dock-b 4.4.0-93-generic #116-Ubuntu SMP Fri Aug 11 21:17:51 UTC 2017 
x86_64 x86_64 x86_64 GNU/Linux
Running docker in bridge configuration

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

Can those affected by this bug test the kernel posted in comment #3?

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Sean Whitney]

Can confirm the same issue with the 4.4.0-93-generic with LXC container
running OpenVPN client.

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Giedrius Stalioraitis]

Can confirm the same issue with "4.10.0-33-generic #37~16.04.1-Ubuntu".
I also have LXD containers, strongswan ipsec VPN server running on that
host. Also, there are 6 e1000e/igb network cards installed and being
used, if that matters.

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Jo Vanvoorden]

I'm also experiencing this issue with 4.4.0-93-generic in combination
with docker,kvm and bonding on host. Not sure if docker or kvm is
causing the warnings.

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Christian Thiemann]

Joseph, thanks for your help! Will need a bit of time to set up a
testing environment for this.

If it helps anyone else with testing/debugging, it looks like the
warning only happens on LXD container hosts that run containers which in
turn connect to an IPSec VPN (using StrongSwan). We get them on LXD
hosts with either "4.4.0-93-generic #116~14.04.1-Ubuntu" or
"4.10.0-33-generic #37~16.04.1-Ubuntu".

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

I built a test kernel with the commit to fix bug 1705447 reverted.  The
reverted commit is:

commit b2504a5dbef3305ef41988ad270b0e8ec289331c
Author: Eric Dumazet 
Date:   Tue Jan 31 10:20:32 2017 -0800
net: reduce skb_warn_bad_offload() noise

The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1715609/

Can you test this kernel and see if it resolves the regression?

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

** Changed in: linux (Ubuntu)
   Status: Confirmed => Triaged

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

** Changed in: linux (Ubuntu Zesty)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu Zesty)
   Status: Triaged => In Progress

** Changed in: linux (Ubuntu)
   Status: Triaged => In Progress

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

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

** Also affects: linux (Ubuntu Zesty)
   Importance: Undecided
   Status: New

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Joseph Salisbury]

** Tags added: kernel-da-key

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Title:
  kernel warning: skb_warn_bad_offload

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[Bug 1715609] Re: kernel warning: skb_warn_bad_offload

[Christian Thiemann]

I don't have apport installed on my servers and was hoping the linked
bug (1705447) is providing enough context. If not, please let me know
and I'll try to provide what I can.

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

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Title:
  kernel warning: skb_warn_bad_offload

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