From c0091073dd775d0446a9f88dda8c9a86b64340b2 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Mon, 18 Jul 2016 16:16:26 +0100 Subject: [PATCH] KVM: arm64: vgic-its: Fix handling of indirect tables The current code will fail on valid indirect tables, and happily use the ones that are pointing out of the guest RAM. Funny what a small "!" can do for you... Signed-off-by: Marc Zyngier --- virt/kvm/arm/vgic/vgic-its.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c index f427fa2..d6697c4 100644 --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -702,9 +702,9 @@ static bool vgic_its_check_device_id(struct kvm *kvm, struct vgic_its *its, return false; /* Each 1st level entry is represented by a 64-bit value. */ - if (!kvm_read_guest(kvm, - BASER_ADDRESS(r) + index * sizeof(indirect_ptr), - &indirect_ptr, sizeof(indirect_ptr))) + if (kvm_read_guest(kvm, + BASER_ADDRESS(r) + index * sizeof(indirect_ptr), + &indirect_ptr, sizeof(indirect_ptr))) return false; /* check the valid bit of the first level entry */ -- 2.7.4