BUG: unable to handle kernel NULL pointer dereference at 0000000000000000

[Cas]

Afraid not much to add, this occurred after rebooting the laptop.

ProblemType: KernelOops
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-13-generic 4.15.0-13.14
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
Annotation: Your system might become unstable now and might need to be restarted.
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: gdm 1156 F.... pulseaudio
                      calum 2981 F.... pulseaudio
Date: Wed Apr 11 22:14:58 2018
DuplicateSignature: BUG: unable to handle kernel NULL pointer dereference at location RIP: timecounter_read+0x10/0x60 RSP: ffffb2b88116be08
Failure: oops
InstallationDate: Installed on 2017-10-20 (173 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
MachineType: LENOVO 20JDCTO1WW
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-13-generic.efi.signed root=UUID=4f03289b-2cac-4bfb-bc59-47e041629a44 ro quiet splash resume=UUID=4f03289b-2cac-4bfb-bc59-47e041629a44 resume_offset=757760 vt.handoff=1
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions: kerneloops-daemon N/A
SourcePackage: linux
Title: BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
UpgradeStatus: Upgraded to bionic on 2018-04-11 (0 days ago)
dmi.bios.date: 12/14/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: N1NET34W (1.21 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20JDCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 31
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN1NET34W(1.21):bd12/14/2017:svnLENOVO:pn20JDCTO1WW:pvrThinkPadX1Yoga2nd:rvnLENOVO:rn20JDCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct31:cvrNone:
dmi.product.family: ThinkPad X1 Yoga 2nd
dmi.product.name: 20JDCTO1WW
dmi.product.version: ThinkPad X1 Yoga 2nd
dmi.sys.vendor: LENOVO

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

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.16 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/v4.16

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]