Thanks! I have tested this kernel; it doesn't work, so the problem is between fc8704280f2ada9f61f08a2d5adc0dab169cc207 and 8eca6add0defde203282476d7969a7c13bbd7d91.
I've gotten set up with a kernel build environment; I think I can finish the git bisect myself, but looking at the commits in that range, I have no hope of actually fixing the underlying bug myself. I'm building 3f6a3b035f91a22c0d3bd27630bf61eac9c8cf6c now. On Tue, Jul 17, 2018 at 11:24 AM, Joseph Salisbury <joseph.salisb...@canonical.com> wrote: > I built the next test kernel, up to the following commit: > fc8704280f2ada9f61f08a2d5adc0dab169cc207 > > The test kernel can be downloaded from: > http://kernel.ubuntu.com/~jsalisbury/lp1777338 > > Can you test that kernel and report back if it has the bug or not? I > will build the next test kernel based on your test results. > > Thanks in advance > > > MD5SUM of files: > d76993d34e1203375090a47c4de8ebfe > linux-image-unsigned-4.15.0-23-generic_4.15.0-23.26~lp1777338Commitfc8704280f_amd64.deb > > 5b89b2341b858bbe2bcae88e3efaf8c8 linux- > modules-4.15.0-23-generic_4.15.0-23.26~lp1777338Commitfc8704280f_amd64.deb > > 6928b4ad5f2a861ad674ff88a4745471 linux-modules- > extra-4.15.0-23-generic_4.15.0-23.26~lp1777338Commitfc8704280f_amd64.deb > > -- > You received this bug notification because you are subscribed to the bug > report. > 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 > > 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 > 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) > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1777338/+subscriptions -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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 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 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1777338/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
