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== Comment: #0 - Shilpasri G. Bhat <[email protected]> - 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: linux (Ubuntu)
Importance: Undecided
Assignee: Taco Screen team (taco-screen-team)
Status: Confirmed
** Tags: architecture-ppc64le bot-comment bugnameltc-123807 severity-high
targetmilestone-inin---
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Backport upstream bugfix in cpuidle to fix memory corruption
https://bugs.launchpad.net/bugs/1442878
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