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