Bionic 4.15.0-23-generic on ppc64 kernel panic's during PXE boot

[Lee Trager]

In the MAAS CI we test ppc64, and in the most recent runs (~from the last 1.5 weeks) the CI started failing with the ppc64le machine never enlisting in MAAS.

Once we have looked at this, we noticed that there's a kernel panic when loading the ephemeral environment. This is a regression version the previous kernel, provided that this is a recent issue.

Current kernel: 4.15.0-23-generic

See console log for details.

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

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1777744

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

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

[Lee Trager (ltrager)]

Unable to run apport-collect as the error occurs while PXE booting the kernel. A panic happens while loading the initrd and a shell is not available.

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

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1777744

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

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

[Stefan Bader (smb)]

Andres, this looks like an issue that got introduced by some security updates (see bug 1773162). The fix should be pending in the 4.15.0-24.26 kernel currently in -proposed. Is there any way to provide this kernel for testing via MaaS?