Thanks for preparing this kernel; I am downloading it now. What are
the expected hashes of the files, so that I can verify the insecure
On Tue, Aug 7, 2018 at 8:49 AM, Joseph Salisbury
> I built a test kernel with commit 74899d92e66663dc7671a8017b3146dcd4735f3b.
> The test kernel can be downloaded from:
> Can you test this kernel and see if it resolves this bug?
> If this kernel also fixes the bug, I'll submit an SRU request.
> Note about installing test kernels:
> • If the test kernel is prior to 4.15(Bionic) you need to install the
> linux-image and linux-image-extra .deb packages.
> • If the test kernel is 4.15(Bionic) or newer, you need to install the
> linux-modules, linux-modules-extra and linux-image-unsigned .deb packages.
> Thanks in advance!
> You received this bug notification because you are subscribed to the bug
> Linux 4.15.0-23 crashes during the boot process with a "Unable to
> handle kernel NULL pointer dereference" message
> Status in linux package in Ubuntu:
> In Progress
> Status in linux source package in Bionic:
> In Progress
> Bug description:
> 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
> 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
> 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)
> PATH=(custom, no user)
> SourcePackage: linux-signed
> UpgradeStatus: Upgraded to bionic on 2018-05-29 (19 days ago)
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Linux 4.15.0-23 crashes during the boot process with a "Unable to
handle kernel NULL pointer dereference" message
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