kernel crash / BUG: unable to handle kernel paging request at fffffe3ed8000020

[Scott Moser]

Booted under maas in rescue mode system console has the attached failure.
First bit is

[ 440.196466] BUG: unable to handle kernel paging request at fffffe3ed8000020

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-generic (not installed)
ProcVersionSignature: User Name 4.13.0-32.35~16.04.1-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 33 Feb 13 15:32 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/timer'] failed with exit code 1:
CRDA: N/A
Date: Tue Feb 13 15:34:40 2018
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: HP ProLiant DL360 Gen9
PciMultimedia:

ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=username/amd64/generic/xenial/daily/boot-kernel nomodeset root=squash:http://10.247.16.6:5248/images/username/amd64/generic/xenial/daily/squashfs ro ip=::::hostname:BOOTIF ip6=off overlayroot=tmpfs overlayroot_cfgdisk=disabled cc:{datasource_list: [MAAS]}end_cc cloud-config-url=http://10.247.16.6:5240/MAAS/metadata/latest/by-id/sbgyxn/?op=get_preseed apparmor=0 log_host=10.247.16.6 log_port=514 --- console=ttyS1 BOOTIF=01-ec:b1:d7:7f:2a:6c
RelatedPackageVersions:
 linux-restricted-modules-4.13.0-32-generic N/A
 linux-backports-modules-4.13.0-32-generic N/A
 linux-firmware N/A
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/05/2015
dmi.bios.vendor: HP
dmi.bios.version: P89
dmi.chassis.type: 23
dmi.chassis.vendor: HP
dmi.modalias: dmi:bvnHP:bvrP89:bd03/05/2015:svnHP:pnProLiantDL360Gen9:pvr:cvnHP:ct23:cvr:
dmi.product.family: ProLiant
dmi.product.name: ProLiant DL360 Gen9
dmi.sys.vendor: HP

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

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Can you reproduce the bug, or was it a one time event?

[Scott Moser (smoser)]

It happens within 3 minutes of system boot into 4.13 kernel.
2 systems reproduced this. You're lucky to be able to log in before it crashes.

[Tetsuo Handa (9-launchpad-i-love-sakura-ne-jp)]

Since you are using apparmor=0 parameter,
this will be a duplicate of bug 1734327.

Try removing apparmor=0 parameter for now.

[Scott Moser (smoser)]

Tetsuo,
Thanks for the info. Removing 'apparmor=0' isn't an option right now both because MAAS doesn't let you control that and because it is there to work around other bugs (originally bug 1677336).

[Joseph Salisbury (jsalisbury)]

I built a test kernel with the patch from Tetsuo. The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1734327

Can you test this kernel and see if it resolves this bug?

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

Thanks in advance!

[Andy Whitcroft (apw)]

This bug was nominated against a series that is no longer supported, ie artful. The bug task representing the artful nomination is being closed as Won't Fix.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.