diff mbox series

[v2,02/12] KVM: x86: Wake up a vCPU when kvm_check_nested_events fails

Message ID 20210604172611.281819-3-jmattson@google.com (mailing list archive)
State New, archived
Headers show
Series KVM: nVMX: Fix vmcs02 PID use-after-free issue | expand

Commit Message

Jim Mattson June 4, 2021, 5:26 p.m. UTC 
At present, there are two reasons why kvm_check_nested_events may
return a non-zero value:

1) we just emulated a shutdown VM-exit from L2 to L1.
2) we need to perform an immediate VM-exit from vmcs02.

In either case, transition the vCPU to "running."

Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Oliver Upton <oupton@google.com>
---
 arch/x86/kvm/x86.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 882457e92679..83bc0a5b1aab 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9471,8 +9471,8 @@  static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu)
 
 static inline bool kvm_vcpu_running(struct kvm_vcpu *vcpu)
 {
-	if (is_guest_mode(vcpu))
-		kvm_check_nested_events(vcpu);
+	if (is_guest_mode(vcpu) && kvm_check_nested_events(vcpu))
+		return true;
 
 	return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
 		!vcpu->arch.apf.halted);