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KVM: Don't accept obviously wrong gsi values via KVM_IRQFD
[sfrench/cifs-2.6.git]
/
virt
/
kvm
/
eventfd.c
diff --git
a/virt/kvm/eventfd.c
b/virt/kvm/eventfd.c
index f2ac53ab82438f0b473ecd8ed91b1e2548af7ca2..c608ab495282ddb63ace657ce0a6deeea18a2240 100644
(file)
--- a/
virt/kvm/eventfd.c
+++ b/
virt/kvm/eventfd.c
@@
-565,6
+565,8
@@
kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
{
if (args->flags & ~(KVM_IRQFD_FLAG_DEASSIGN | KVM_IRQFD_FLAG_RESAMPLE))
return -EINVAL;
+ if (args->gsi >= KVM_MAX_IRQ_ROUTES)
+ return -EINVAL;
if (args->flags & KVM_IRQFD_FLAG_DEASSIGN)
return kvm_irqfd_deassign(kvm, args);