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-rw-r--r--virt/kvm/arm/vgic/vgic-its.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index 268a0c7ea3a5..4943d6aebdd1 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -693,8 +693,17 @@ static bool vgic_its_check_device_id(struct kvm *kvm, struct vgic_its *its,
gfn_t gfn;
- if (!(r & GITS_BASER_INDIRECT))
- return device_id < (l1_tbl_size / GITS_BASER_ENTRY_SIZE(r));
+ if (!(r & GITS_BASER_INDIRECT)) {
+ phys_addr_t addr;
+
+ if (device_id >= (l1_tbl_size / GITS_BASER_ENTRY_SIZE(r)))
+ return false;
+
+ addr = BASER_ADDRESS(r) + device_id * GITS_BASER_ENTRY_SIZE(r);
+ gfn = addr >> PAGE_SHIFT;
+
+ return kvm_is_visible_gfn(kvm, gfn);
+ }
/* calculate and check the index into the 1st level */
index = device_id / (SZ_64K / GITS_BASER_ENTRY_SIZE(r));