hwe-edge kernel 5.3.0-23.25 kernel does not boot on Precision 5720 AIO
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Critical
|
Seth Forshee | ||
Bionic |
Invalid
|
Undecided
|
Unassigned | ||
Eoan |
Fix Released
|
Critical
|
Seth Forshee | ||
linux-hwe-edge (Ubuntu) |
Invalid
|
Critical
|
Seth Forshee | ||
Bionic |
Fix Released
|
Critical
|
Seth Forshee | ||
Eoan |
Invalid
|
Undecided
|
Unassigned |
Bug Description
SRU Justification
Impact: The fix for bug 1850234 does not function as intended in bionic, as a result of modinfo not knowing about module signatures. This results in no modules being signed in hwe kernels based on 5.3, rendering systems with secure boot enabled unbootable.
Fix: Check for the module signature at the end of modules instead of relying on modinfo. This can be done without any external tools needing to be aware of module signatures.
Test Case: Check that all built modules contain signatures, except for those in staging which have not been whitelisted.
Regression Potential: I can think of two possible regression situations. We could regress to the behavior prior to the fix for bug 1850234, or the eoan 5.3 kernel could also end up with all modules unsigned. I've done test builds of both the eoan 5.3 kernel and the bionic 5.3 hwe-edge kernel with this patch and checked that the results are as intended. We should also check this again once new kernels have been built, before copying them out to -proposed.
---
The latest hwe-edge kernel 5.3.0-23.25 fails to boot with the message that it cannot find the UUID associated with the root partition. The user gets dropped to a busybox shell with an initramfs prompt. The standard hwe kernel does not have this issue and the last hwe-edge kernel that does work is 5.3.0-19.20.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-generic-
ProcVersionSign
Uname: Linux 5.3.0-19-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Nov 14 08:19:57 2019
EcryptfsInUse: Yes
InstallationDate: Installed on 2019-09-01 (73 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
ProcEnviron:
TERM=xterm-
PATH=(custom, no user)
XDG_RUNTIME_
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: linux-meta-hwe-edge
UpgradeStatus: No upgrade log present (probably fresh install)
CVE References
summary: |
- hwe-edge kernel 5.3.0-32.25 kernel does not boot on Precision 5720 AIO + hwe-edge kernel 5.3.0-23.25 kernel does not boot on Precision 5720 AIO |
description: | updated |
description: | updated |
Changed in linux (Ubuntu Eoan): | |
status: | In Progress → Fix Committed |
Changed in linux-hwe-edge (Ubuntu Bionic): | |
status: | In Progress → Fix Committed |
tags: |
added: verification-failed-bionic removed: verification-needed-bionic |
tags: |
added: verification-done-bionic removed: verification-needed-bionic |
Same problem for me on a Lenovo ideapad 320-15ABR since 5.3.0-22.24.
All kernel versions up to 5.3.0-19.20 work fine.
I inspected /proc/modules and /dev after being dropped to busybox:
- /proc/modules is empty
- neither hardisks nor partitions are present under /dev