Re: perf: fuzzer causes lockup in x86_pmu_event_init()

From: Jiri Olsa
Date: Wed Mar 04 2015 - 05:33:20 EST


On Mon, Mar 02, 2015 at 02:13:25PM -0500, Vince Weaver wrote:
> On Sat, 28 Feb 2015, Jiri Olsa wrote:
>
> > hum, I dont see the locking is a problem.. but looks like once
> > the sibling becomes singleton event, we dont init its sibling_list
> >
> > how about patch below.. compile tested ;-)
>
> so this is instead of PeterZ's patch?

I think it's in addition.. Peter?

>
> I'll start my test-machine fuzzing with this plus the infinite-interrupt
> fix and see what happens. The machines do eventually trigger the issue
> somwhat consistently but it can take up to a week before they hit it
> so it's a tough one to test for.

thanks,
jirka
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