Ubuntu
linux package

[Ubuntu 20.04] Unset HIBERNATION and PM kernel config options for focal

Bug #1867753 reported by bugproxy
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Ubuntu on IBM z Systems
Fix Released
Undecided
Unassigned
linux (Ubuntu)
Fix Released
Undecided
Skipper Bug Screeners

Bug Description

Addl change required for kernel config.

from
CONFIG_HIBERNATION=y
CONFIG_PM=y

to
#CONFIG_HIBERNATION is not set
#CONFIG_PM is not set

hope that will be the last ticket for 20.04...

CVE References

bugproxy (bugproxy)
tags: added: architecture-s39064 bugnameltc-184145 severity-critical targetmilestone-inin1804
Changed in ubuntu:
assignee: nobody → Skipper Bug Screeners (skipper-screen-team)
affects: ubuntu → linux (Ubuntu)
Ethan Lin (mainsystemadmin)
Changed in linux (Ubuntu):
status: New → Incomplete
Changed in ubuntu-z-systems:
status: New → Incomplete
Frank Heimes (fheimes)
summary: - [Ubuntu 20.04] Verification for final kernel config options
+ [Ubuntu 20.04] Unset HIBERNATION and PM kernel config options for 20.04
Frank Heimes (fheimes)
summary: - [Ubuntu 20.04] Unset HIBERNATION and PM kernel config options for 20.04
+ [Ubuntu 20.04] Unset HIBERNATION and PM kernel config options for focal
Revision history for this message
bugproxy (bugproxy) wrote : Comment bridged from LTC Bugzilla

------- Comment From <email address hidden> 2020-03-18 11:32 EDT-------
CONFIG_HIBERNATION: Hibernation (aka Suspend-to-Disk) is known to broken on s390 since a long time - the architecure support for this will be removed from the kernel soon. Therefore this config option should be disabled.

CONFIG_PM is rather useless without CONFIG_HIBERNATION, therefore disable this as well.

Revision history for this message
Seth Forshee (sforshee) wrote :

Let me just double check with you about disabling CONFIG_PM, as it also supports runtime power management of devices. If CONFIG_PM is disabled devices will not be put into low power states when idle.

Revision history for this message
bugproxy (bugproxy) wrote :

------- Comment From <email address hidden> 2020-03-20 05:34 EDT-------
(In reply to comment #16)
> Let me just double check with you about disabling CONFIG_PM, as it also
> supports runtime power management of devices. If CONFIG_PM is disabled
> devices will not be put into low power states when idle.

Yes, that's perfectly fine. There is now low power state for devices on s390.

Revision history for this message
bugproxy (bugproxy) wrote :

------- Comment From <email address hidden> 2020-03-20 05:56 EDT-------
(In reply to comment #17)
> (In reply to comment #16)
> > Let me just double check with you about disabling CONFIG_PM, as it also
> > supports runtime power management of devices. If CONFIG_PM is disabled
> > devices will not be put into low power states when idle.
>
> Yes, that's perfectly fine. There is now low power state for devices on s390.

I meant to write: There is _no_ low power state for devices on s390.

Revision history for this message
Seth Forshee (sforshee) wrote :

Config changes applied for focal.

Changed in linux (Ubuntu):
status: Incomplete → Fix Committed
Frank Heimes (fheimes)
Changed in ubuntu-z-systems:
status: Incomplete → Fix Committed
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote :

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-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

tags: added: verification-needed-focal
Revision history for this message
Frank Heimes (fheimes) wrote :

Successfully verified - updating tag.

tags: added: verification-done-focal
removed: verification-needed-focal
bugproxy (bugproxy)
tags: added: verification-needed-focal
removed: verification-done-focal
Revision history for this message
Frank Heimes (fheimes) wrote :

The ticket should be now verification-done-focal (maybe a bugzilla bridge issue) ...

tags: added: verification-done-focal
removed: verification-needed-focal
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package linux - 5.4.0-21.25

---------------
linux (5.4.0-21.25) focal; urgency=medium

  * CVE-2020-8835
    - SAUCE: bpf: undo incorrect __reg_bound_offset32 handling

 -- Thadeu Lima de Souza Cascardo <email address hidden> Thu, 26 Mar 2020 17:51:28 -0300

Changed in linux (Ubuntu):
status: Fix Committed → Fix Released
Frank Heimes (fheimes)
Changed in ubuntu-z-systems:
status: Fix Committed → Fix Released
Revision history for this message
bugproxy (bugproxy) wrote :

------- Comment From <email address hidden> 2020-03-31 07:45 EDT-------
IBM Bugzilla status-> closed, Fix Released with focal

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