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    SubjectRe: Is it possible to give the user the option to cancel forkbombs?
    On Sat, 17 Nov 2007 09:55:01 -0800
    Dane Mutters <dmutters@gmail.com> wrote:

    > I don't know if this is at all feasible, but is it possible to have a
    > mechanism that would detect a fork bomb in progress and either stop the
    > fork, or allow the user to cancel the operation? For example, are there
    > any legitimate processes (i.e. ones that really need to fork like crazy)
    > that would need to generate 200+ processes in less than 1 second?
    >
    > (Note: I'm not a programmer; I'm just throwing out the idea.)
    >

    If the parent PID of the new task is exported through TASKSTATS, you can
    do it already in userspace. If not, that data should be exported.

    Then you could write a root daemon using netlink, set it to RT priority
    and create an inheritable counter in it to thwart binary forking.
    The counter would be cleared every x seconds.
    No need to do it in the kernel.
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