*** This bug is a duplicate of bug 1705447 ***
https://bugs.launchpad.net/bugs/1705447
** This bug has been marked a duplicate of bug 1705447
misleading kernel warning skb_warn_bad_offload during checksum calculation
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https://bugs.launchpad.net/bugs/1717750
Title:
Kernel warning "skb_warn_bad_offload" every second
Status in linux package in Ubuntu:
Confirmed
Bug description:
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
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