On 2018-12-04 11:50:07 [+0100], Greg Kroah-Hartman wrote:
> From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
>
> commit 68239654acafe6aad5a3c1dc7237e60accfebc03 upstream.
>
> --- a/arch/x86/kernel/fpu/signal.c
> +++ b/arch/x86/kernel/fpu/signal.c
> @@ -344,10 +344,10 @@ static int __fpu__restore_sig(void __use
> sanitize_restored_xstate(tsk, &env, xfeatures, fx_only);
> }
>
> + local_bh_disable();
> fpu->initialized = 1;
> - preempt_disable();
> fpu__restore(fpu);
> - preempt_enable();
> + local_bh_enable();
This hits stable trees now. For -RT we need a preempt_disable() before
that local_bh_disable(). I'm going to add this to next v4.19-RT but if
you happen to "just" update to the next stable be aware of that.
> return err;
> } else {
Sebastian
