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    SubjectRe: disk-destroyer.c
    On Sat, Jul 22, 2000 at 11:10:57AM +0100, Anton Ivanov wrote:

    > And on the topic of root/moot/etc every third if not every second workstation
    > installation out there has some of the hdXX or sdXX with permissions that
    > alllow non-root to mess with them. Reasons are numerous - CR rippers, CD
    > writers, CD players, etc...
    > First: you can blow up you firmware on CD devices as well. Happily. Quite a
    > lot of them support flashing and firmware updates.
    > Second: All the above programs do what? Execute tons of ioctls... and/or mess
    > at low level. So if they blow up and pass bogus data before dying miserably...
    > So if the kernel can check some stuff with no serious performance penalty it
    > should do so.

    Note that the ioctls in quiestion - those that are potentially dangerous
    - do check for CAP_SYS_ADMIN, and thus you really have to *be* root, not
    just have permissions to write to the device.

    Vojtech Pavlik
    SuSE Labs

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