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Groups > linux.kernel > #1607607

[PATCH v1 0/2] cpuidle: Fixes in cpuidle driver

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When CONFIG_HOTPLUG_CPU=n and cpu_present is less than cpu_possible,
then cpuidle-powernv not passing an explicit drv->cpu_mask allows
generic cpuidle driver to try create sysfs objects for cpus that does
not have cpu_devices created by calling register_cpu().

This caused kernel to access incorrect address and crash. The
following patch series fixes the cpuidle-powernv driver and also adds
additional checks in cpuidle_add_sysfs()

This patch set is against v4.11-rc3.

Changed from v1: Updated commit message and comments.

Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>

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[PATCH v1 0/2] cpuidle: Fixes in cpuidle driver Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> - 2017-03-23 16:30 +0100
  Re: [PATCH v2 1/2] powerpc/powernv/cpuidle: Pass correct drv->cpumask  for registration "Rafael J. Wysocki" <rafael@kernel.org> - 2017-03-23 16:30 +0100
    Re: [PATCH v2 1/2] powerpc/powernv/cpuidle: Pass correct  drv->cpumask for registration Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> - 2017-03-23 16:50 +0100
    Re: [PATCH v2 1/2] powerpc/powernv/cpuidle: Pass correct drv->cpumask for registration Michael Ellerman <mpe@ellerman.id.au> - 2017-03-27 12:50 +0200
  [PATCH v2 2/2] cpuidle: Validate cpu_dev in cpuidle_add_sysfs Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> - 2017-03-23 16:30 +0100
    Re: [PATCH v2 2/2] cpuidle: Validate cpu_dev in cpuidle_add_sysfs "Rafael J. Wysocki" <rafael@kernel.org> - 2017-03-23 16:30 +0100
      Re: [PATCH v2 2/2] cpuidle: Validate cpu_dev in cpuidle_add_sysfs Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> - 2017-03-23 16:50 +0100
  [PATCH v2 1/2] powerpc/powernv/cpuidle: Pass correct drv->cpumask for registration Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> - 2017-03-23 16:30 +0100
    Re: [PATCH v2 1/2] powerpc/powernv/cpuidle: Pass correct drv->cpumask  for registration Gautham R Shenoy <ego.lkml@gmail.com> - 2017-03-24 09:40 +0100

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