On 17/06/15 14:21, Peter Maydell wrote:
> On 17 June 2015 at 12:53, Eric Auger <[email protected]> wrote:
>> shouldn't we test somewhere that the hwirq is between 16 and 1019.
>
> Not directly related, but that reminds me that I noticed the
> other day that we have VGIC_MAX_IRQS = 1024 (and use that as a
> guard on how many irqs we let userspace configure and ask us
> to deliver), but that doesn't account for the couple of magic
> numbers at the top of the range. I think that lets userspace
> cause us to do UNPREDICTABLE things to the GIC...
Good point. How about the following:
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 78fb820..950064a 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -1561,7 +1561,7 @@ int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid,
unsigned int irq_num,
goto out;
}
- if (irq_num >= kvm->arch.vgic.nr_irqs)
+ if (irq_num >= min(kvm->arch.vgic.nr_irqs, 1020))
return -EINVAL;
vcpu_id = vgic_update_irq_pending(kvm, cpuid, irq_num, level);
@@ -2161,10 +2161,7 @@ int kvm_set_irq(struct kvm *kvm, int irq_source_id,
BUG_ON(!vgic_initialized(kvm));
- if (spi > kvm->arch.vgic.nr_irqs)
- return -EINVAL;
return kvm_vgic_inject_irq(kvm, 0, spi, level);
-
}
/* MSI not implemented yet */
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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