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    SubjectRe: Using ftrace/perf as a basis for generic seccomp
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    On Sat, 2011-02-05 at 12:51 +0100, Stefan Fritsch wrote:

    > A really major use case is socketcall(2). All socket related syscalls
    > (accept, bind, connect, receivemsg, ...) are implemented as socketcall
    > with an appropriate argument. There will be many cases where you want a
    > sandboxed process to be able to do recvmsg(2) to receive new file
    > descriptors over an already open unix-domain socket from a broker process.
    > But you may want to disallow other socket operations, especially listen,
    > accept, and connect.
    >
    > Of course one could also add some special case handling for socketcall
    > in seccomp instead of using the full filtering.

    That looks like a perfect use-case for the LSM bits, attach some state
    to both the fd object and the task object and if they don't match, don't
    allow the action.





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