Re: [PATCH][stable-4.{4,9,14,19}] KVM: arm64: Fix exclusive limit for IPA size

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, Mar 15, 2021 at 11:08:33AM +0000, Marc Zyngier wrote:
> Commit 262b003d059c6671601a19057e9fe1a5e7f23722 upstream.
> 
> When registering a memslot, we check the size and location of that
> memslot against the IPA size to ensure that we can provide guest
> access to the whole of the memory.
> 
> Unfortunately, this check rejects memslot that end-up at the exact
> limit of the addressing capability for a given IPA size. For example,
> it refuses the creation of a 2GB memslot at 0x8000000 with a 32bit
> IPA space.
> 
> Fix it by relaxing the check to accept a memslot reaching the
> limit of the IPA space.
> 
> Fixes: c3058d5da222 ("arm/arm64: KVM: Ensure memslots are within KVM_PHYS_SIZE")
> Reviewed-by: Eric Auger <eric.auger@redhat.com>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> Cc: stable@vger.kernel.org # 4.4, 4.9, 4.14, 4.19
> Reviewed-by: Andrew Jones <drjones@redhat.com>
> Link: https://lore.kernel.org/r/20210311100016.3830038-3-maz@kernel.org
> ---
>  virt/kvm/arm/mmu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

This file does not exist in 4.4.y or 4.9.y, so I can't apply it there :(

Queued up everywhere else, and also the other backports you sent,
thanks.

gre gk-h