Re: perf/tracepoint: another fuzzer generated lockup

[Vince Weaver]

possibly not an issue with your patch, but found in nearby code:

in perf_trace_init:

        int event_id = p_event->attr.config;

	...

                if (tp_event->event.type == event_id &&


note that "attr.config" is 64-bit but "event_id" is only 32-bit,
so things like 0xffffffff00000018 will map to irq_work_exit.

I'm not sure if your PERM code properly handles this case, I don't have 
time to work through the macro-magic in your patch.

Vince


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