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    SubjectRe: About ACL for IPC Object
    zhou peng wrote:
    > Hi,
    >
    > I have added ACL support to POSIX msg queue on linux kernel 2.6.32.
    > Casey Schaufler, would you or anyone like review the patch for me please?
    >

    I didn't see anything horribly wrong, but I have not tested it.
    Christoph's comments should be heeded.

    > The patch is attached.
    >

    Please include patches inline. It is much easier to make specific
    comments that way and it is The Way We Do Things.

    > Best,
    >
    > 2010/1/21 Casey Schaufler <casey@schaufler-ca.com>:
    >
    >> zhou peng wrote:
    >>
    >>> Hi all,
    >>>
    >>> There are ACL in file system, but why there are no ACL implementation
    >>> in IPC object, eg. shm, message queue, FIFO?
    >>>
    >>>
    >> Most people haven't noticed that IPC objects are even there, much less
    >> that they have mode bits and not ACLs. Even when we were doing security
    >> evaluations on Unix boxes in the 1990's they were considered insufficiently
    >> interesting to justify the additional work to do ACLs.
    >>
    >> If you really want ACLs on IPC objects it would make a dandy little
    >> project for a summer. I would be happy to review patches.
    >>
    >>
    >>> Is there any fine grained granting in ipc object just like in file object?
    >>>
    >>>
    >> As Stephen Smalley points out, you can do it with SELinux, although
    >> that it rather like driving a thumbtack with a bulldozer.
    >>
    >>
    >>> Thanks,
    >>> Best
    >>>
    >>> --
    >>> zhoupeng
    >>> --
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    >>>
    >>>
    >>>
    >>
    >
    >
    >
    >



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