I recompiled the 4.18.0-20-general kernel and made the following
changes, and things start to work.
258c258,261
<
---
> if (limit < 1) {
> pr_err("efi: Invalid name size %ld/%d.\n", name_size, limit);
> return 0;
> }
Logs proving the fix worked:
[ 0.321692] Registered efivars operations
[ 0.330723] efi: efi: Invalid name size 0/0.
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https://bugs.launchpad.net/bugs/1830951
Title:
kernel panic: stack corrupted in efivar_ssdt_iter+0xd3/0xe8
Status in linux package in Ubuntu:
Confirmed
Bug description:
We have a few 2010 mac pro running 1604 LTS that are just upgraded to Ubuntu
1804 LTS. While they all worked fine with the 1604 LTS and 4.4 kernel, they can
no longer boot with the 4.15.0-50 kernel installed with 1804.
We tried various kernel flags without luck, and installed latest 4.18.0-20
from HWE and got the same result.
Unfortunately, no logs are created in /var/logs when the issue happens, and
we could only boot with the old 4.4 kernel. We had to enable earlyprintk=efi to
get a backtrace in a photo.
The issue happens consistently, i.e. the backtrace looks always the same just
happens on different cores.
Attached the boot-info output and the picture taken at the end of the kernel
loading.
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: steventang 2047 F.... pulseaudio
/dev/snd/controlC0: steventang 2047 F.... pulseaudio
/dev/snd/controlC1: steventang 2047 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
HibernationDevice: RESUME=UUID=a7ceb7f0-6040-4236-ad7d-35780a1dc870
InstallationDate: Installed on 2019-05-28 (0 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64
(20160420.1)
MachineType: Apple Inc. MacPro5,1
NonfreeKernelModules: wl
Package: linux (not installed)
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-148-generic
root=UUID=8d18bfd8-303b-4397-9216-a0e48cb6ef54 ro quiet splash
ProcVersionSignature: Ubuntu 4.4.0-148.174-generic 4.4.177
RelatedPackageVersions:
linux-restricted-modules-4.4.0-148-generic N/A
linux-backports-modules-4.4.0-148-generic N/A
linux-firmware 1.173.6
Tags: bionic
Uname: Linux 4.4.0-148-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 08/08/17
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MP51.88Z.0084.B00.1708080528
dmi.board.asset.tag: 0
dmi.board.name: Mac-F221BEC8
dmi.board.vendor: Apple Inc.
dmi.chassis.type: 7
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F221BEC8
dmi.modalias:
dmi:bvnAppleInc.:bvrMP51.88Z.0084.B00.1708080528:bd08/08/17:svnAppleInc.:pnMacPro5,1:pvr0.0:rvnAppleInc.:rnMac-F221BEC8:rvr:cvnAppleInc.:ct7:cvrMac-F221BEC8:
dmi.product.name: MacPro5,1
dmi.product.version: 0.0
dmi.sys.vendor: Apple Inc.
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