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SubjectRe: BEWARE! Linux seteuid is broken!
> This is what the fsuid/fsgid feature of Linux is intended for. It's
> being used by the nsfd since several versions and therefore ordinary
> users can't kill it anymore.

Alas, NFSD is not the only program in the world.
There are a lot of setuid programs,
that should not be killed by users, when they work under user euid.
And file system access is not the only task that should be performed
with user euid.

POSIX (or not POSIX again?) solved this problem in nice and
consistent way, and we do not need invent the wheel.

Alexey Kuznetsov.

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