Re: [PATCH v4.14 backport] KVM: arm/arm64: vgic-its: Preserve the revious read from the pending table

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On Tue, Dec 12, 2017 at 05:42:31PM +0100, Christoffer Dall wrote:
> From: Marc Zyngier <marc.zyngier@xxxxxxx>
> 
> Commit 64afe6e9eb4841f35317da4393de21a047a883b3 upstream.
> 
> The current pending table parsing code assumes that we keep the
> previous read of the pending bits, but keep that variable in
> the current block, making sure it is discarded on each loop.
> 
> We end-up using whatever is on the stack. Who knows, it might
> just be the right thing...
> 
> Fixes: 33d3bc9556a7d ("KVM: arm64: vgic-its: Read initial LPI pending table")
> Cc: <stable@xxxxxxxxxxxxxxx> # 4.8
> Reported-by: AKASHI Takahiro <takahiro.akashi@xxxxxxxxxx>
> Reviewed-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
> Signed-off-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
> ---
>  virt/kvm/arm/vgic/vgic-its.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

All 4 backports queued up, many thanks for them.

greg k-h



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