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    SubjectRe: perf/tracepoint: another fuzzer generated lockup
    On Sat, Nov 09, 2013 at 03:52:59PM +0100, Frederic Weisbecker wrote:
    > So, an idea of what may be happening: an event overflows while FASYNC flag is set so it triggers an irq work
    > to send the signal (kill_fasync).
    > After the irq work triggers, it generates an irq_work_exit event, which in turn overflows and,
    > if it has FASYNC, triggers a new irq work. The irq work triggers and generates an irq work exit event which
    > has FASYNC flag, etc...
    >
    > Looks like a nice way to deadlock with an infinite loop of irq work.


    Yep, exactly, see the email I just send.


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