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    SubjectRe: [PATCH][ATM] use rtnl_{lock,unlock} during device operations (take 2)
    Mitchell Blank Jr wrote:
    > so basically if atmsigd goes nuts in can easily stomp all
    > over the kernel's memory.

    Naw, it isn't supposed to do that :-) I wonder if anyone
    actually made functional changes to atmsigd (or qgen ;-) since
    I last touched it ...

    But yes, with a unified VCC table, it certainly makes sense to
    add a hash to validate those pointers. I still think that using
    pointers per se is a good idea, because they're naturally
    unique numbers. Given that a VCC can be in all kinds of states,
    it would be pretty hard to use anything in struct atm_vcc else
    as a unique key. Also, it's not very common to have atmsigd
    talk ISP (Internal Signaling Protocol - the thing used between
    atmsigd and the kernel) to a different box.

    > the ATMSIGD_CTRL ioctl so at least there's no security hole but it's still
    > damn gross (no offense, Werner :-)

    It could probably be used to leverage other security holes in
    atmsigd. (Not that I'm aware of any, but I'd be surprised if
    there were none.)

    - Werner

    / Werner Almesberger, Buenos Aires, Argentina /
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      Last update: 2005-03-22 13:36    [W:0.018 / U:15.964 seconds]
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