** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
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Title:
starting VMs causing retpoline4 to reboot
Status
@Andy Whitcroft (apw), just want to confirm that this doesn't need to be
tracked further. Everything seems to work fine in Bionic. Thanks!
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This bug was fixed in the package linux - 4.13.0-36.40
---
linux (4.13.0-36.40) artful; urgency=medium
* linux: 4.13.0-36.40 -proposed tracker (LP: #1750010)
* Rebuild without "CVE-2017-5754 ARM64 KPTI fixes" patch set
linux (4.13.0-35.39) artful; urgency=medium
* linux:
This is fixed with Linux desktop 4.13.0-35-generic #39-Ubuntu SMP Mon
Feb 12 11:06:39 UTC 2018
** Tags removed: verification-needed-artful
** Tags added: verification-done-artful
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This bug is awaiting verification that the 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-
artful' to 'verification-done-artful'. If the problem still exists,
change the tag
** Changed in: linux (Ubuntu Artful)
Status: New => Fix Committed
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Title:
starting VMs causing retpoline4 to reboot
Status
** Also affects: linux (Ubuntu Artful)
Importance: Undecided
Status: New
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Title:
starting VMs causing retpoline4 to
This bug appears fixed with that kernel, thanks!
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Title:
starting VMs causing retpoline4 to reboot
Status in linux package in
Ok tracked this down to an issue with the RSB stuffer. I have applied a
group of upstream fixes in this area and this has resolved the lockups
in my testing. Could you do a final confirmation with the below kernel
to make sure this also fixes your issues:
Tried disabling some BIOS settings including trusted computing and
hyperthreading which didn't have any effect.
Tried getting more info with linux-crashdump but it doesn't seem to work.
I am currently running with no kvm issues with mainline v4.15.1 and Full AMD
retpoline.
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** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Andy Whitcroft (apw)
** Changed in: linux (Ubuntu)
Importance: Undecided => Critical
** Changed in: linux (Ubuntu)
Status: Confirmed => In Progress
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Booting with spectre_v2=retpoline,generic results in "Full generic
retpoline" and also reboots when trying to start a KVM guest.
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I saw similar issues on an older AMD (Opteron) box. With retpoline4 it
was a hang but when I used a test version of what we currently have on
master-next I got a reboot as well. The fault seems to happen very
quickly, so there is not even output on a serial console.
Checking
That feature bit warning is normal. Occurs benignly in most VM starts.
I have tested this on an Intel system and am not seeing any issues with
VMs so the issue must be AMD specific at least.
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Might be related, might not. This is displayed before the reboot.
host doesn't support requested feature: CPUID.01H:ECX.vmx [bit 5]
I did downgrade from the testing qemu packages, maybe that changed my
VMs, but that still shouldn't cause a host reboot (or kvm with no
options).
** Attachment
** Description changed:
Using 4.13.0-33.36~retpoline4 kernel test kernel from ppa
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/spectre/.
CPU: AMD Ryzen 7 1700 Eight-Core Processor
Ubuntu: 17.10.
Steps to reproduce (has occurred both times I tried it):
- 1. Run
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