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KVM: arm/arm64: vgic-v3: Fix off-by-one LR access 

When iterating over the used LRs, be careful not to try to access
an unused LR, or even an unimplemented one if you're unlucky...

Reviewed-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
This commit is contained in:
Marc Zyngier 2017-04-10 10:19:44 +01:00 committed by Christoffer Dall
parent ff567614d5
commit cffcd9df10
1 changed files with 1 additions and 1 deletions
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2
virt/kvm/arm/hyp/vgic-v3-sr.c
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@ -143,7 +143,7 @@ void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu)
val = read_gicreg(ICH_VTR_EL2);
nr_pri_bits = vtr_to_nr_pri_bits(val);
for (i = 0; i <= used_lrs; i++) {
for (i = 0; i < used_lrs; i++) {
if (cpu_if->vgic_elrsr & (1 << i))
cpu_if->vgic_lr[i] &= ~ICH_LR_STATE;
else