Public bug reported:
I went to boot my computer today and it wouldn't boot.
I get an "Unable to handle kernel NULL pointer dereference" message
during the boot process, and, a bit after that, a message from the
kernel watchdog about CPU #0 being stuck. Then the boot process stops
completely.
I was able to boot the system by telling Grub to load 4.15.0-22, which
works perfectly fine, so there has been a regression.
I am running Ubuntu as a Xen dom0, if that matters. I haven't tried
booting the offending kernel version without Xen.
I'm not sure where, if anywhere, these messages go on disk, for posting.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-23-generic 4.15.0-23.25
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Uname: Linux 4.15.0-22-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.9-0ubuntu7.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Jun 17 10:12:58 2018
InstallationDate: Installed on 2017-08-06 (314 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: linux-signed
UpgradeStatus: Upgraded to bionic on 2018-05-29 (19 days ago)
** Affects: linux-signed (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1777338
Title:
Linux 4.15.0-23 crashes during the boot process with a "Unable to
handle kernel NULL pointer dereference" message
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