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| author | Ingo Molnar <mingo@kernel.org> | 2016-05-05 09:57:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-05-05 09:57:27 +0200 |
| commit | e8c8ce54807b19e90ac84e609b13f7d4e337eab1 (patch) | |
| tree | ae7d65ae17d55aee197b605ce1a193fe594af614 /arch/x86/kvm/hyperv.c | |
| parent | 5db4298133d99b3dfc60d6899ac9df169769c899 (diff) | |
| parent | 04974df8049fc4240d22759a91e035082ccd18b4 (diff) | |
Merge tag 'v4.6-rc6' into locking/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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; |