Hi Louis,
Thank you very much for reporting the issue and helping us debug and
verify the fix!
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https://bugs.launchpad.net/bugs/1956575
Title:
[Regression] Focal kernel
This bug was fixed in the package linux - 5.4.0-94.106
---
linux (5.4.0-94.106) focal; urgency=medium
* focal/linux: 5.4.0-94.106 -proposed tracker (LP: #1956628)
* [Regression] Focal kernel 5.4.0-92.103 fails to boot when Secure Encrypted
Virtualization(SEV) is enabled
** Tags removed: verification-needed-focal
** Tags added: verification-done-focal
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Title:
[Regression] Focal kernel 5.4.0-92.103
This bug is awaiting verification that the linux/5.4.0-94.106 kernel in
-proposed solves the problem. Please test the kernel and update this bug
with the results. If the problem is solved, change the tag
'verification-needed-focal' to 'verification-done-focal'. If the problem
still exists, change
Here is the result of a similar bisect on the bionic kernel :
https://kernel.ubuntu.com/git/ubuntu/ubuntu-
bionic.git/commit/?id=091554e4a5b2a7647830a1c7beea781148b51509
091554e4a5b2a7647830a1c7beea781148b51509 is the first bad commit
commit 091554e4a5b2a7647830a1c7beea781148b51509
** Changed in: linux (Ubuntu Focal)
Status: In Progress => Fix Committed
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Title:
[Regression] Focal kernel 5.4.0-92.103
** Changed in: linux (Ubuntu Bionic)
Status: New => Confirmed
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => High
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Hello @kmously, yes I am able to reproduce the same panic on 4.15.0-166.
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https://bugs.launchpad.net/bugs/1956575
Title:
[Regression] Focal kernel 5.4.0-92.103 fails to
4.4 doesn't have the offending commit so marking it as invalid.
** Changed in: linux (Ubuntu Xenial)
Status: New => Invalid
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Hello @Louis,
Are you able to confirm whether the 4.15 kernels are affected by this
problem?
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Title:
[Regression] Focal kernel
I also prepared a bionic/linux-gcp-5.4 test kernel with the fix and I
confirmed it also fixed the same boot problem in confidential computing
instances.
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The 5.11 hirsute kernel already contains the fix, so I'm marking it as
invalid:
https://git.launchpad.net/~ubuntu-
kernel/ubuntu/+source/linux/+git/hirsute/commit/?id=929ece70ad54afc1ca090ea1914b79def67137c1
** Description changed:
+ [Impact]
+
The latest Focal kernel
According to the following advisory[1] from HP, this is a known issue
which is fixed upstream :
"Advisory: Red Hat Enterprise Linux 8.3 - Guest Stops Responding at
efi_mokvar_sysfs_init+0xa9/0x19d with AMD Secure Encrypted
Virtualization (SEV) Enabled"
The upstream fix cited in the article is
** Description changed:
The latest Focal kernel (linux-image-5.4.0-92-generic) fails to boot
when SEV is enabled.
The kernel panics with the following backtrace :
[1.531125] ledtrig-cpu: registered to indicate activity on CPUs
[1.531760] EFI Variables Facility v0.08
Details of the bisected commit :
https://kernel.ubuntu.com/git/ubuntu/ubuntu-
focal.git/commit/?id=5f79bc17fd8d078378a9f3c8773ebcb506cb6f40
Revert "UBUNTU: SAUCE: (lockdown) Make get_cert_list() not complain about cert
lists that aren't present."
BugLink: https://bugs.launchpad.net/bugs/1932029
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