linux-kernel - Re: [PATCH backport hints for <3.10] KVM: x86: Convert vapic synchronization to

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Message-ID: <20131216152446.GA1894@kroah.com>
Date:	Mon, 16 Dec 2013 07:24:46 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	linux-kernel@...r.kernel.org, francis.moro@...il.com,
	kvm@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH backport hints for <3.10] KVM: x86: Convert vapic
 synchronization to _cached functions (CVE-2013-6368)

On Mon, Dec 16, 2013 at 12:38:17PM +0100, Paolo Bonzini wrote:
> The KVM patch "fix vapic memory corruption" applies to most kernels that
> have KVM, but the fix does not apply on many older branches.  The APIs it
> uses are available in 3.1, but until 3.9 kvm_gfn_to_hva_cache_init had
> one fewer parameter.
> 
> The comments in this patch should help fixing kvm_lapic_set_vapic_addr
> in older kernels.  I will review the backports as they are posted to
> LKML (if I am CCed...).
> 
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
> ---
>  arch/x86/kvm/lapic.c | 38 +++++++++++++++++++++++++++++---------
>  arch/x86/kvm/lapic.h |  4 ++--
>  arch/x86/kvm/x86.c   | 33 +--------------------------------
>  3 files changed, 32 insertions(+), 43 deletions(-)

I don't understand, what are people supposed to do with this?

greg k-h
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