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    SubjectRe: dynamic /dev security hole?
    On Llu, 2004-08-09 at 05:40, Eric Lammerts wrote:
    > Just an idea for a fix for this problem: If udev would change the
    > permissions to 000 and ownership to root.root just before it unlinks
    > the device node, the copy would become useless.

    Unfortunately not the whole story. The permissions are checked at open
    time not on read/write/ioctl so once I have the device opened you
    lose. That means you may have to fix the permissions and ownership
    before trying to unload the device. The unload will fail if it is still
    busy but if not then nobody will be able to open the dev node and
    whatever file it now points to.

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      Last update: 2005-03-22 14:05    [W:0.019 / U:0.712 seconds]
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