>> Heh, I was pondering this the other day after the realisation that
>> ptrace() could prevent SIGKILL from killing a process.

> Hmmm....  If ptrace() could prevent SIGKILL from taking effect for
> anyone but the superuser then that would be a very serious security
> bug, not just on un-hardened boxes.

Greg, meet Reality.

I've never seen a system with ptrace that _didn't_ work this way.  (Not
that I've looked very hard.)

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