Public bug reported:
== Comment: #0 - Shilpasri G. Bhat <shigb...@in.ibm.com> - 2015-04-10 14:35:43
==
This is a request to backport upstream cpuidle bugfix for a memory corruption
d52356e7f48e powerpc: fix memory corruption by pnv_alloc_idle_core_states
Space allocated for paca is based off nr_cpu_ids, but
pnv_alloc_idle_core_states()
iterates paca with cpu_nr_cores()*threads_per_core, which is using NR_CPUS.
This causes pnv_alloc_idle_core_states() to write over memory, which is outside
of paca array and may later lead to various panics.
Fixes: 7cba160ad789 (powernv/cpuidle: Redesign idle states management)
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: architecture-ppc64le bugnameltc-123807 severity-high
targetmilestone-inin---
** Tags added: architecture-ppc64le bugnameltc-123807 severity-high
targetmilestone-inin---
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https://bugs.launchpad.net/bugs/1442878
Title:
Backport upstream bugfix in cpuidle to fix memory corruption
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