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

[Marc Zyngier <maz@kernel.org>]

On 2021-03-15 11:30, Greg KH wrote:
> 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 
> :(

Ah, git rename handling fixed that up for me, and I didn't pay
attention to the resulting path... Sorry about that.

I'll resend the patch for 4.4 and 4.9

Thanks,

         M.
-- 
Jazz is not dead. It just smells funny...