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    SubjectRe: [RFC] procfs: add hidepid and hidenet modes
    On Sun, Jun 12, 2011 at 11:51:01AM +0400, Vasiliy Kulikov wrote:
    > hidenet means /proc/PID/net will be accessible to processes with
    > CAP_NET_ADMIN capability or to members of a special group.
    > gid=XXX defines a group that will be able to gather all processes' info
    > and network connections info.
    > Similar features are implemented for old kernels in -ow patches (for
    > Linux 2.2 and 2.4) and for Linux 2.6 in -grsecurity (but both of them
    > are implemented as configure options, not cofigurable in runtime).
    > In current version hidenet works for CONFIG_NET_NS=y via creating a
    > "fake" net namespace and slipping it to nonauthorized users, resulting
    > in users observing blank net files (like nobody use the network). If
    > CONFIG_NET_NS=n I don't see anything better than just fully denying
    > access to /proc/<pid>/net. More elegant ideas are welcome.

    This fake netns concept is ugly.
    If you wan't deny something, why don't you return -E?

    Regardless, these should be separate patch from PID stuff.

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      Last update: 2011-06-12 13:15    [W:0.019 / U:8.920 seconds]
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