linux-kernel - Re: [patch 0/5] Support for sanitization flag in low-level page allocator

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Message-ID: <20090522143914.2019dd47@lxorguk.ukuu.org.uk>
Date:	Fri, 22 May 2009 14:39:14 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"Larry H." <research@...reption.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Rik van Riel <riel@...hat.com>,
	linux-kernel@...r.kernel.org, Linus Torvalds <torvalds@...l.org>,
	linux-mm@...ck.org, Ingo Molnar <mingo@...hat.com>,
	pageexec@...email.hu
Subject: Re: [patch 0/5] Support for sanitization flag in low-level page
 allocator

> > performance point of view: we _dont_ want to clear the full stack 
> > page for every kernel thread exiting.
> 
> Burning the stack there is beyond overkill.

Yet most of our historic leaks have been padding bytes in stack based
structures. Your position seems very inconsistent.
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