Re: PATCH? trace_remove_event_call() should fail if call is active

[Oleg Nesterov]

On 07/03, Oleg Nesterov wrote:
>
> IOW. So far _I think_ we just need the additional changes in
> trace_remove_event_call() if it succeeds (with the patch I sent)
> to prevent the races like above, but I didn't even try to think
> about this problem.

And I guess greatly underestimated the problem(s). When I look at
this code now, it seems that, say, event_enable_write() will use
the already freed ftrace_event_file in this case.

Still I think this is another (although closely related) problem.

> Or I missed your point completely?

Yes?

Oleg.

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