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    SubjectRe: setresuid()

    From: (Marek Michalkiewicz)
    Date: Wed, 27 Nov 1996 01:12:34 +0100 (MET)

    Theodore Y. Ts'o:
    > What we're missing is the "if any one of the current uids
    > (ruid/euid/suid) is 0" test; that was an oversight on my part.

    Yes. Also, I found one more bug: fsuid wasn't reset to euid -
    so, filesystem access was still possible under the old fsuid
    after setresuid(uid, uid, uid). Or was this intentional?

    Nope, this wasn't intentional; thanks for catching it!

    OK, sorry it took so long, here is the patch for 2.1.13. It adds
    the uid 0 check, clears the dumpable flag, and resets fsuid.
    setresgid() should be similar but it needs a new syscall number
    - I'm not sure what is the proper way to allocate one.

    I haven't tried running with it, but it looks good to me!!

    - Ted

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