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| author | David S. Miller <davem@davemloft.net> | 2016-04-10 00:41:41 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-10 00:41:41 +0300 |
| commit | ae95d7126104591348d37aaf78c8325967e02386 (patch) | |
| tree | 3270712f030549d77d4c55246d056e02b9def29d /arch/x86/kvm/hyperv.c | |
| parent | 03c5b534185f9844c1b5fcfdbae2adc32821ec42 (diff) | |
| parent | 183c948a3cb3efbf45eabed41fa7ee04c19378fc (diff) | |
| download | linux-ae95d7126104591348d37aaf78c8325967e02386.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'arch/x86/kvm/hyperv.c')
| -rw-r--r-- | arch/x86/kvm/hyperv.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 5ff3485acb60..01bd7b7a6866 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -1116,6 +1116,11 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu) break; case HVCALL_POST_MESSAGE: case HVCALL_SIGNAL_EVENT: + /* don't bother userspace if it has no way to handle it */ + if (!vcpu_to_synic(vcpu)->active) { + res = HV_STATUS_INVALID_HYPERCALL_CODE; + break; + } vcpu->run->exit_reason = KVM_EXIT_HYPERV; vcpu->run->hyperv.type = KVM_EXIT_HYPERV_HCALL; vcpu->run->hyperv.u.hcall.input = param; |