linux-kernel - Re: [PATCH 1/3] signal(i386): alternative signal stack wraparound occurs

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Message-ID: <20071204215716.GA16446@elte.hu>
Date:	Tue, 4 Dec 2007 22:57:17 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Roland McGrath <roland@...hat.com>
Cc:	Shi Weihua <shiwh@...fujitsu.com>, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH 1/3] signal(i386): alternative signal stack wraparound
	occurs


* Roland McGrath <roland@...hat.com> wrote:

> > > Thank you for your detailed explanation and patch. I tested your 
> > > patch, unfortunately it can not stop all kinds of overflow.
> > [...]
> > > So, the patch I posted is still needed 
> > 
> > thanks, i've picked up your fix for x86.git, for 2.6.25 merging.
> 
> I just explained that not all overflows would be caught and that doing 
> so would violate the semantics of e.g. longjmp.  I don't see how the 
> patch you've included now doesn't still have all those problems.  I 
> think it's wrong.

ok, i've dropped it and reinstated your original fix - i missed that 
detail.

	Ingo
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