Commit 2ec02f6c authored by Ricardo Koller's avatar Ricardo Koller Committed by Marc Zyngier
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KVM: arm64: vgic-v3: Check ITS region is not above the VM IPA size 



Verify that the ITS region does not extend beyond the VM-specified IPA
range (phys_size).

  base + size > phys_size AND base < phys_size

Add the missing check into vgic_its_set_attr() which is called when
setting the region.

Reviewed-by: default avatarEric Auger <eric.auger@redhat.com>
Signed-off-by: default avatarRicardo Koller <ricarkol@google.com>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211005011921.437353-5-ricarkol@google.com
parent c56a87da

arch/arm64/kvm/vgic/vgic-its.c

+2 −2
Original line number Diff line number Diff line
@@ -2710,8 +2710,8 @@ static int vgic_its_set_attr(struct kvm_device *dev, 
		if (copy_from_user(&addr, uaddr, sizeof(addr)))

			return -EFAULT;



		ret = vgic_check_ioaddr(dev->kvm, &its->vgic_its_base,

					addr, SZ_64K);

		ret = vgic_check_iorange(dev->kvm, its->vgic_its_base,

					 addr, SZ_64K, KVM_VGIC_V3_ITS_SIZE);

		if (ret)

			return ret;