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Date: Thu, 12 Oct 2017 12:52:05 +0200
From: Hunger <>
Cc:, Graham Christensen <>, 
	Franz Pletz <>, Domen Ko┼żar <>, 
	Rob Vermaas <>
Subject: Re: Privilege escalation with kill(-1, SIGKILL) in XNU
 kernel of macOS High Sierra

On Thu, Oct 12, 2017 at 4:00 AM, Kurt Seifried <> wrote:

> So I normally wouldn't accept this posting (and no doubt Solar will be
> annoyed because this isn't Open Source per se, and he's 100% right) but
> this posting does provide a good teachable moment.

And here's the teachable moment for you...

The XNU kernel is Open Source:

The Apple Public Source License 2.0 approved by the OSI:

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