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Date: Thu, 14 Dec 2017 22:29:07 +0100
From: Greg KH <gregkh@linuxfoundation.org>
To: Christoffer Dall <christoffer.dall@linaro.org>
Cc: stable@vger.kernel.org, Marc Zyngier <marc.zyngier@arm.com>
Subject: Re: [PATCH v3.18 backport] arm: KVM: Fix VTTBR_BADDR_MASK BUG_ON
 off-by-one
Message-ID: <20171214212907.GC27981@kroah.com>
References: <20171214210424.25740-2-christoffer.dall@linaro.org>
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On Thu, Dec 14, 2017 at 10:04:22PM +0100, Christoffer Dall wrote:
> From: Marc Zyngier <marc.zyngier@arm.com>
> 
> Commit 5553b142be11e794ebc0805950b2e8313f93d718 upstream.
> 
> VTTBR_BADDR_MASK is used to sanity check the size and alignment of the
> VTTBR address. It seems to currently be off by one, thereby only
> allowing up to 39-bit addresses (instead of 40-bit) and also
> insufficiently checking the alignment. This patch fixes it.
> 
> This patch is the 32bit pendent of Kristina's arm64 fix, and
> she deserves the actual kudos for pinpointing that one.
> 
> Fixes: f7ed45be3ba52 ("KVM: ARM: World-switch implementation")
> Cc: <stable@vger.kernel.org> # 3.9
> Reported-by: Kristina Martsenko <kristina.martsenko@arm.com>
> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
> ---
>  arch/arm/include/asm/kvm_arm.h | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)

Now applied, thanks.

greg k-h