Verify that the GICv2 CPU interface does not extend beyond the
VM-specified IPA range (phys_size).
base + size > phys_size AND base < phys_size
Add the missing check into kvm_vgic_addr() which is called when setting
the region. This patch also enables some superfluous checks for the
distributor (vgic_check_ioaddr was enough as alignment == size for the
distributors).
Signed-off-by: Ricardo Koller <ricarkol@xxxxxxxxxx>
---
arch/arm64/kvm/vgic/vgic-kvm-device.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kvm/vgic/vgic-kvm-device.c b/arch/arm64/kvm/vgic/vgic-kvm-device.c
index f714aded67b2..b379eb81fddb 100644
--- a/arch/arm64/kvm/vgic/vgic-kvm-device.c
+++ b/arch/arm64/kvm/vgic/vgic-kvm-device.c
@@ -79,7 +79,7 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
{
int r = 0;
struct vgic_dist *vgic = &kvm->arch.vgic;
- phys_addr_t *addr_ptr, alignment;
+ phys_addr_t *addr_ptr, alignment, size;
u64 undef_value = VGIC_ADDR_UNDEF;
mutex_lock(&kvm->lock);
@@ -88,16 +88,19 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V2);
addr_ptr = &vgic->vgic_dist_base;
alignment = SZ_4K;
+ size = KVM_VGIC_V2_DIST_SIZE;
break;
case KVM_VGIC_V2_ADDR_TYPE_CPU:
r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V2);
addr_ptr = &vgic->vgic_cpu_base;
alignment = SZ_4K;
+ size = KVM_VGIC_V2_CPU_SIZE;
break;
case KVM_VGIC_V3_ADDR_TYPE_DIST:
r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V3);
addr_ptr = &vgic->vgic_dist_base;
alignment = SZ_64K;
+ size = KVM_VGIC_V3_DIST_SIZE;
break;
case KVM_VGIC_V3_ADDR_TYPE_REDIST: {
struct vgic_redist_region *rdreg;
@@ -162,7 +165,7 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
goto out;
if (write) {
- r = vgic_check_ioaddr(kvm, addr_ptr, *addr, alignment);
+ r = vgic_check_iorange(kvm, addr_ptr, *addr, alignment, size);
if (!r)
*addr_ptr = *addr;
} else {
--
2.33.0.685.g46640cef36-goog
