** Changed in: ubuntu
       Status: New => Confirmed

** Package changed: ubuntu => linux (Ubuntu)

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Taco Screen team (taco-screen-team)

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  Backport upstream bugfix in cpuidle to fix memory corruption

Status in linux package in Ubuntu:

Bug description:
  == 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 
  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 
  of paca array and may later lead to various panics.

  Fixes: 7cba160ad789 (powernv/cpuidle: Redesign idle states management)

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