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

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Message-Id: <20071204215251.60C6326F8D9@magilla.localdomain>
Date:	Tue,  4 Dec 2007 13:52:51 -0800 (PST)
From:	Roland McGrath <roland@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
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

> > 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.


Thanks,
Roland
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