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SubjectRe: perf/tracepoint: another fuzzer generated lockup
On Fri, Nov 15, 2013 at 10:16:18AM +0900, Masami Hiramatsu wrote:
> Kprobes itself can detect nested call by using per-cpu current-running
> kprobe pointer. And if it is nested, it just skips calling handlers.
> Anyway, I don't recommend to probe inside the handlers, but yes,
> you can trace perf-handler by ftrace B). I actually traced a kprobe-bug
> by kprobe-tracer last night, that was amazing :)

Ah, ok, so that would avoid the worst problems. Good. Should we still
mark the entire perf swevent path as __kprobes just to be sure?


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