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    SubjectRe: [RFC,PATCH 1/2] seccomp_filters: system call filtering using BPF
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    On Wed, 2012-01-11 at 11:25 -0600, Will Drewry wrote:

    > Filter programs may _only_ cross the execve(2) barrier if last filter
    > program was attached by a task with CAP_SYS_ADMIN capabilities in its
    > user namespace. Once a task-local filter program is attached from a
    > process without privileges, execve will fail. This ensures that only
    > privileged parent task can affect its privileged children (e.g., setuid
    > binary).

    This means that a non privileged user can not run another program with
    limited features? How would a process exec another program and filter
    it? I would assume that the filter would need to be attached first and
    then the execv() would be performed. But after the filter is attached,
    the execv is prevented?

    Maybe I don't understand this correctly.

    -- Steve




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