Bug 1532058

Summary:	CONFIG_RESET_ATTACK_MITIGATION forces Lenovo X220 to hard power off and power on instead of reboot
Product:	[Fedora] Fedora	Reporter:	ValdikSS <iam>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	low	Docs Contact:
Priority:	unspecified
Version:	27	CC:	airlied, ajax, bskeggs, ewk, hdegoede, ichavero, itamar, jarodwilson, jglisse, john.j5live, jonathan, josef, kernel-maint, labbott, linville, mchehab, mjg59, steved
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	kernel-4.14.13-300.fc27 kernel-4.14.13-200.fc26	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-01-12 14:43:18 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description ValdikSS 2018-01-07 20:03:32 UTC

Description of problem:

Fedora 26/27 kernel has Reset Attack Mitigation enabled (CONFIG_RESET_ATTACK_MITIGATION) which may cause strange reboot sequence on certain hardware (Lenovo Thinkpad X220).
Instead of rebooting normally, the laptop would hard power off (without properly stopping peripherals and internal devices, which may be spotted by HDD losing power with a specific unusual sound) and then powers on again after 1 second.

This option should be configurable if possible. I made the systemd service to workaround the problem, which writes "0" to MemoryOverwriteRequestControl EFI variable:
https://gist.github.com/ValdikSS/86352b03ec3ed3c8713b78c7e20dc222



Version-Release number of selected component (if applicable):
kernel-4.14.11-300.fc27.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Boot Fedora 26/27, either live or installed
2. Reboot the computer (Lenovo X220 laptop in my case)

Actual results:
The computer perform hard power off and power on after 1 second

Expected results:
The computer reboots without losing power

Comment 1 ValdikSS 2018-01-07 21:22:50 UTC

The author of this patch  Matthew Garrett‏:

>It shouldn't be enabled unless there's code in the shutdown path to clear the flag on clean shutdowns

Comment 2 Laura Abbott 2018-01-08 22:43:44 UTC

Yes, I talked to Matthew and confirmed that this shouldn't be on unless there is a userspace component. I don't want to do that right now so I turned off the option. The bug will be updated when it gets picked up into a build.

Comment 3 Fedora Update System 2018-01-11 12:55:15 UTC

kernel-4.14.13-300.fc27 has been submitted as an update to Fedora 27. https://bodhi.fedoraproject.org/updates/FEDORA-2018-21a7ad920c

Comment 4 Fedora Update System 2018-01-11 12:57:52 UTC

kernel-4.14.13-200.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2018-e6fe35524d

Comment 5 ValdikSS 2018-01-11 13:21:41 UTC

This kernel fixed the issue.
And also fixed #1497559.

Comment 6 Fedora Update System 2018-01-11 23:09:23 UTC

kernel-4.14.13-300.fc27 has been pushed to the Fedora 27 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-21a7ad920c

Comment 7 Fedora Update System 2018-01-11 23:43:22 UTC

kernel-4.14.13-200.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-e6fe35524d

Comment 8 Fedora Update System 2018-01-12 14:43:18 UTC

kernel-4.14.13-300.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report.

Comment 9 Fedora Update System 2018-01-13 23:05:34 UTC

kernel-4.14.13-200.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.