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    SubjectRe: [patch 7/8] fdmap v2 - implement sys_socket2
    > Real world example is nss_ldap / pam_ldap -- these needs open socket to 
    > ldap server. That socket is cached. And because they can not trust that
    > application does not have closed file description of them, they check it with
    > getpeername + getsockname (at least it did when I looked code on
    > some years ago.)
    >
    > ( opening socket again includes using starttls and authentication .. so it is
    > quite some overhead )

    And if the fd was closed because of a security transition in the
    application hiding it and caching it from the application might then lead
    to a security hole.

    Alan
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