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Date: Wed, 18 Jan 2012 20:36:02 +0100
From: Andi Kleen <andi@firstfloor.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Indan Zupancic <indan@nul.nu>, Andi Kleen <andi@firstfloor.org>,
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        Roland McGrath <mcgrathr@chromium.org>
Subject: Re: Compat 32-bit syscall entry from 64-bit task!?
Message-ID: <20120118193602.GV11715@one.firstfloor.org>
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The real fix is really to use a LSM for custom jails.  Trying to make 
ptrace secure is trying to make a sieve wather tight by plugging the individual
holes one by one. It's simply not suitable for this.

-Andi
-- 
ak@linux.intel.com -- Speaking for myself only.