Fix RCU warning on AMD laptops
Bug #2036377 reported by
Kai-Heng Feng
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | ||
---|---|---|---|---|---|---|
HWE Next |
New
|
Undecided
|
Unassigned | |||
linux (Ubuntu) | Status tracked in Mantic | |||||
Jammy |
Won't Fix
|
Undecided
|
Unassigned | |||
Lunar |
Fix Committed
|
Low
|
Unassigned | |||
Mantic |
Fix Committed
|
Low
|
Unassigned | |||
linux-oem-6.1 (Ubuntu) | Status tracked in Mantic | |||||
Jammy |
Fix Released
|
Low
|
Unassigned | |||
Lunar |
Invalid
|
Undecided
|
Unassigned | |||
Mantic |
Invalid
|
Undecided
|
Unassigned | |||
linux-oem-6.5 (Ubuntu) | Status tracked in Mantic | |||||
Jammy |
Fix Committed
|
Low
|
Unassigned | |||
Lunar |
Invalid
|
Undecided
|
Unassigned | |||
Mantic |
Invalid
|
Undecided
|
Unassigned |
Bug Description
[Impact]
Scary kernel splat about RCU can be observed everytime laptop resumes
from suspend.
[Fix]
Use non-atomic notifier for power supply change to relax the constraint.
[Test]
Once the fix is applied, no more RCU warning can be found after several
suspend/resume cycle.
[Where problems could occur]
Essentially no regression potential. Atomic notifier should be used by
core kernel, and things like power supply doesn't need to be atomic
anyway.
CVE References
Changed in linux (Ubuntu Jammy): | |
status: | New → Won't Fix |
Changed in linux-oem-6.1 (Ubuntu Jammy): | |
status: | New → Confirmed |
Changed in linux-oem-6.5 (Ubuntu Jammy): | |
status: | New → Confirmed |
importance: | Undecided → Low |
Changed in linux-oem-6.1 (Ubuntu Jammy): | |
importance: | Undecided → Low |
Changed in linux-oem-6.1 (Ubuntu): | |
status: | New → Invalid |
Changed in linux-oem-6.5 (Ubuntu): | |
status: | New → Opinion |
status: | Opinion → Invalid |
Changed in linux (Ubuntu Lunar): | |
status: | New → Confirmed |
importance: | Undecided → Low |
Changed in linux-oem-6.1 (Ubuntu Lunar): | |
status: | New → Invalid |
Changed in linux-oem-6.5 (Ubuntu Lunar): | |
status: | New → Invalid |
Changed in linux (Ubuntu Mantic): | |
importance: | Undecided → Low |
status: | New → Confirmed |
tags: | added: oem-priority originate-from-2026823 stella |
Changed in linux (Ubuntu Lunar): | |
status: | Confirmed → Fix Committed |
Changed in linux-oem-6.5 (Ubuntu Jammy): | |
status: | Confirmed → Fix Committed |
Changed in linux-oem-6.1 (Ubuntu Jammy): | |
status: | Confirmed → Fix Committed |
Changed in linux (Ubuntu Mantic): | |
status: | Confirmed → Fix Committed |
tags: |
added: verification-done-jammy-linux-oem-6.1 verification-done-jammy-linux-oem-6.5 verification-done-lunar-linux removed: verification-needed-jammy-linux-oem-6.1 verification-needed-jammy-linux-oem-6.5 verification-needed-lunar-linux |
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This bug is awaiting verification that the linux-oem- 6.1/6.1. 0-1024. 24 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- jammy-linux- oem-6.1' to 'verification- done-jammy- linux-oem- 6.1'. If the problem still exists, change the tag 'verification- needed- jammy-linux- oem-6.1' to 'verification- failed- jammy-linux- oem-6.1' .
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!