From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: KVM: MMU: handle invalid root_hpa at __direct_map
Date: Sun, 22 Dec 2013 12:56:49 -0200
Message-ID: <20131222145649.GA6611@amt.cnet>
References: <CADs-y4TpXQ0zvg4p-_fkKkMDbEiho89hzhkSAYMEVAxbp63XzQ@mail.gmail.com>
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Cc: Muli Ben-Yehuda <mulix@mulix.org>, kvm@vger.kernel.org,
	pbonzini@redhat.com, xiaoguangrong@linux.vnet.ibm.com,
	Benoit Hudzia <benoit@stratoscale.com>,
	Abel Gordon <abel@stratoscale.com>,
	Dan Aloni <alonid@stratoscale.com>
To: Rom Freiman <rom@stratoscale.com>
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On Sun, Dec 22, 2013 at 11:17:21AM +0200, Rom Freiman wrote:
> Hello everyone,
> 
> I've been chasing this bug for a while.
> 
> According to my research, this bug fix is works fine for
> 3.11.9-200.fc19.x86_64 kernel version (and I also came to almost similar
> solution and really solved the crash).
> 
> But, the problem is, that it seems that this patch does not work on 3.13.0-rc2+
> - it looks like the code flow is different and it crashes in ept_page_fault
> and does not reach __direct_map:

Yep, similar problem, care to send a patch against

FNAME(page_fault), kvm_mmu_get_spte_hierarchy

Maybe there are more vulnerable sites, should secure them all.