linux-kernel - Re: vdso && cr (Was: arch_check_bp_in

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Message-ID: <20121123174529.GB3361@redhat.com>
Date:	Fri, 23 Nov 2012 18:45:29 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Amnon Shiloh <u3557@...o.sublimeip.com>
Cc:	Pavel Emelyanov <xemul@...allels.com>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org
Subject: Re: vdso && cr (Was: arch_check_bp_in_kernelspace: fix the range

Amnon,

I am going to "ignore" this thread because this is not my area and
I can't help anyway. Just one note:

On 11/23, Amnon Shiloh wrote:
>
> The solution can be to hold all catched signals while in the VDSO page.
> ...
>
> 1) + introduce a kernel feature to prevent
>    catching signals within the VDSO page (probably a new prctl,
>    or make it the default)

Sorry, never ;)

Oleg.

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