On Thu, Aug 10, 2017 at 09:54:01AM +0100, Suzuki K Poulose wrote:
> commit 7e5a672289c9754d07e1c3b33649786d3d70f5e4 upstream.
>
> The mmu_notifier_release() callback of KVM triggers cleaning up
> the stage2 page table on kvm-arm. However there could be other
> notifier callbacks in parallel with the mmu_notifier_release(),
> which could cause the call backs ending up in an empty stage2
> page table. Make sure we check it for all the notifier callbacks.
>
> Fixes: commit 293f29363 ("kvm-arm: Unmap shadow pagetables properly")
> Cc: stable@xxxxxxxxxxxxxxx # v4.9-
> Reported-by: Alex Graf <agraf@xxxxxxx>
> Reviewed-by: Christoffer Dall <cdall@xxxxxxxxxx>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
>
> ---
>
> This is a back port of the patch for stable tree for version v4.9 and
> earlier.
now applied, thanks.
greg k-h