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    SubjectRe: [kernel-hardening] Re: [PATCH] proc: restrict access to /proc/interrupts
    On Mon, Nov 07, 2011 at 11:21:32PM +0000, Alan Cox wrote:
    > > It's better than nothing, but it really isn't wonderful - because it's
    > > really not just about audio. And revoke doesn't work universally.
    > BSD invented revoke but never implemented it universally. It turns out
    > that this isn't a big problem. Right now we basically only have revoke
    > for tty devices but we don't need it for that much more. Revoke on disk
    > files and the like has simply never happened because its not a matter of
    > revoke being universal so much as universal revoke being universally
    > pointless.

    I looked into implementing revoke() a while ago, and looked at how BSD
    did it. They really only implemented it for a very narrow range of
    devices (tty only I think), which is not what we really want.

    I thought people wanted it for all char and block devices, if this isn't
    so, then it might be easier to implement than I thought.

    So, what do we really need revoke() for these days?

    But that's getting away from the original topic here, sorry...

    greg k-h

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      Last update: 2011-11-08 00:31    [W:0.021 / U:16.128 seconds]
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