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KVM: Improve create VCPU parameter (CVE-2013-4587)
[pandora-kernel.git]
/
virt
/
kvm
/
kvm_main.c
diff --git
a/virt/kvm/kvm_main.c
b/virt/kvm/kvm_main.c
index
8bf05f0
..
bfa8e1e
100644
(file)
--- a/
virt/kvm/kvm_main.c
+++ b/
virt/kvm/kvm_main.c
@@
-1683,6
+1683,9
@@
static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id)
int r;
struct kvm_vcpu *vcpu, *v;
+ if (id >= KVM_MAX_VCPUS)
+ return -EINVAL;
+
vcpu = kvm_arch_vcpu_create(kvm, id);
if (IS_ERR(vcpu))
return PTR_ERR(vcpu);