Kernel warning "skb_warn_bad_offload" every second

[Tobi]

Using Kernel 4.4.0-93-generic #116-Ubuntu SMP.

The issue has been marked as fixed with this kernel here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705447

There are several LXD containers running on the machine. Several offloading features have been disabled on eth0 and the LXD bridge, but not on the interfaces of the LXD containers.

Output of "ethtool":

> ethtool -k lxdbr0
Features for lxdbr0:
rx-checksumming: off [fixed]
tx-checksumming: off
        tx-checksum-ipv4: off [fixed]
        tx-checksum-ip-generic: off
        tx-checksum-ipv6: off [fixed]
        tx-checksum-fcoe-crc: off [fixed]
        tx-checksum-sctp: off [fixed]
scatter-gather: off
        tx-scatter-gather: off
        tx-scatter-gather-fraglist: off
tcp-segmentation-offload: off
        tx-tcp-segmentation: off
        tx-tcp-ecn-segmentation: off
        tx-tcp6-segmentation: off
udp-fragmentation-offload: off
generic-segmentation-offload: off
generic-receive-offload: off
large-receive-offload: off [fixed]
rx-vlan-offload: off [fixed]
tx-vlan-offload: on
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: on
rx-vlan-filter: off [fixed]
vlan-challenged: off [fixed]
tx-lockless: on [fixed]
netns-local: on [fixed]
tx-gso-robust: off [requested on]
tx-fcoe-segmentation: off [requested on]
tx-gre-segmentation: on
tx-ipip-segmentation: on
tx-sit-segmentation: on
tx-udp_tnl-segmentation: on
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off [fixed]
tx-vlan-stag-hw-insert: on
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off [fixed]
busy-poll: off [fixed]
hw-tc-offload: off [fixed]

> ethtool -k eth0
Features for eth0:
rx-checksumming: off
tx-checksumming: off
        tx-checksum-ipv4: off
        tx-checksum-ip-generic: off [fixed]
        tx-checksum-ipv6: off
        tx-checksum-fcoe-crc: on [fixed]
        tx-checksum-sctp: off
scatter-gather: off
        tx-scatter-gather: off
        tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: off
        tx-tcp-segmentation: off
        tx-tcp-ecn-segmentation: off [fixed]
        tx-tcp6-segmentation: off
udp-fragmentation-offload: off [fixed]
generic-segmentation-offload: off
generic-receive-offload: off
large-receive-offload: off
rx-vlan-offload: on
tx-vlan-offload: on
ntuple-filters: off
receive-hashing: on
highdma: on [fixed]
rx-vlan-filter: on [fixed]
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: on [fixed]
tx-gre-segmentation: off [fixed]
tx-ipip-segmentation: off [fixed]
tx-sit-segmentation: off [fixed]
tx-udp_tnl-segmentation: off [fixed]
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off
busy-poll: on [fixed]
hw-tc-offload: off

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-93-generic 4.4.0-93.116
ProcVersionSignature: Ubuntu 4.4.0-93.116-generic 4.4.79
Uname: Linux 4.4.0-93-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 Sep 16 22:29 seq
 crw-rw---- 1 root audio 116, 33 Sep 16 22:29 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.1-0ubuntu2.10
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:
Date: Sat Sep 16 23:10:39 2017
HibernationDevice: RESUME=UUID=185e0b64-60b6-4296-a530-0bd8c988ec3f
InstallationDate: Installed on 2016-01-12 (613 days ago)
InstallationMedia:

MachineType: Supermicro X10DRH
PciMultimedia:

ProcEnviron:
 TERM=screen
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
ProcFB: 0 astdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-93-generic root=/dev/md1 ro rootdelay=10 net.ifnames=0
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-93-generic N/A
 linux-backports-modules-4.4.0-93-generic N/A
 linux-firmware 1.157.12
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/17/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2.0
dmi.board.asset.tag: Default string
dmi.board.name: X10DRH-iT
dmi.board.vendor: Supermicro
dmi.board.version: 1.10
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 23
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2.0:bd12/17/2015:svnSupermicro:pnX10DRH:pvr123456789:rvnSupermicro:rnX10DRH-iT:rvr1.10:cvnDefaultstring:ct23:cvrDefaultstring:
dmi.product.name: X10DRH
dmi.product.version: 123456789
dmi.sys.vendor: Supermicro

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.