On Tue, Apr 24, 2007 at 01:10:23PM +0400, Alexey Dobriyan wrote:
> ยน But I see whole can of other bugs! I think they were already lurking
>   but weren't easily reproducable without hitting double-free first.
>   FWIW, it's
>       BUG_ON(!list_empty(&tsk->ptracees));

mmm, pretty easily reproduced with:

        while true; do
                killall -9 expl_ptratt 2>/dev/null;
                killall -9 exe 2>/dev/null;
                sleep 2;
        done
vs
        while true; do ./expl_ptratt; done

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