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Date: Mon, 19 May 2014 12:40:22 +0400
From: Cyrill Gorcunov <gorcunov@gmail.com>
Subject: Re: mm: NULL ptr deref handling mmaping of special mappings
Message-ID: <20140519084022.GC2185@moon>
References: <5373D509.7090207@oracle.com>
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To: Pavel Emelyanov <xemul@parallels.com>
Cc: Andy Lutomirski <luto@amacapital.net>, "linux-mm@kvack.org" <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>, Sasha Levin <sasha.levin@oracle.com>, Andrew Morton <akpm@linux-foundation.org>, Dave Jones <davej@redhat.com>

On Mon, May 19, 2014 at 12:27:29PM +0400, Pavel Emelyanov wrote:
> > 
> > What happens if you try to checkpoint a program that's in the vdso or,
> > worse, in a signal frame with the vdso on the stack?
> 
> Nothing good, unfortunately :( And this is one of the things we're investigating.
> Cyrill can shed more light on it, as he's the one in charge.

vdso on stack should not be a big deal, because we keep original vdso proxy.

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