ipv6 forwarding kernel oops

[Rob Emanuele]

After a box is configured as an ipv6 router and net.ipv6.conf.enp1s0.accept_ra=2 is set the kernel panics when it tries to forward packets. The crash occurs after a few packets go through.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-38-generic 4.4.0-38.57
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-38-generic.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D3', '/dev/snd/pcmC0D2c', '/dev/snd/pcmC0D2p', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
Date: Fri Sep 23 17:21:03 2016
HibernationDevice: RESUME=/dev/mapper/wormhole--vg-swap_1
InstallationDate: Installed on 2016-09-21 (2 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: MSI MS-7599
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 XGI
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-38-generic root=/dev/mapper/hostname--vg-root ro console=tty0 console=ttyS0,115200n8
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-38-generic N/A
 linux-backports-modules-4.4.0-38-generic N/A
 linux-firmware 1.157.3
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
StagingDrivers: xgifb
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/30/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V10.9
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 870-G45 (MS-7599)
dmi.board.vendor: MSI
dmi.board.version: 2.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.version: 2.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV10.9:bd08/30/2013:svnMSI:pnMS-7599:pvr2.0:rvnMSI:rn870-G45(MS-7599):rvr2.0:cvnMSI:ct3:cvr2.0:
dmi.product.name: MS-7599
dmi.product.version: 2.0
dmi.sys.vendor: MSI

[Brad Figg (brad-figg)]

This change was made by a bot.

[Rob Emanuele (rjemanuele)]

Panic terminal output

[Rob Emanuele (rjemanuele)]

/etc/wide-dhcpv6/dhcp6c.conf

[Rob Emanuele (rjemanuele)]

/etc/radvd.conf

[Rob Emanuele (rjemanuele)]

/etc/sysctl.conf

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.8 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8

[Rob Emanuele (rjemanuele)]

One crash

[Rob Emanuele (rjemanuele)]

Second Crash (took longer)

[Rob Emanuele (rjemanuele)]

I still get a panic as shown in the last 2 included files on 4.8.0.

[Rob Emanuele (rjemanuele)]

Just ran Memcheck86 that is included with 16.04. Passed.

[Rob Emanuele (rjemanuele)]

Anything new with this?

[Rob Emanuele (rjemanuele)]

Corrected tag

This is still an issue.

[Rob Emanuele (rjemanuele)]

Replacing the TP-LINK TG-3468 ver 2.0, which is a RTL8169e, with an Intel PRO/1000 VT Quad Port Server Adapter LP PCI-E EXPI9404VT solved the crash. That driver for the Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller may be suspect.