fix(gateway): qualify concurrent fair allocation

gateway/provider.go

@@ -449,11 +449,12 @@ type fakeSession struct {
 }
 
 func (s *fakeSession) Ready(ctx context.Context) error {
+	s.mu.Lock()
 	if s.failure == FakeFailureReadinessTimeout {
+		s.mu.Unlock()
 		<-ctx.Done()
 		return ctx.Err()
 	}
-	s.mu.Lock()
 	defer s.mu.Unlock()
 	if s.state.State == ProviderStateDisconnected {
 		return ErrProviderDisconnected
@@ -585,7 +586,10 @@ func (s *fakeSession) ReleaseAll(_ context.Context) error {
 }
 
 func (s *fakeSession) Terminate(ctx context.Context) error {
-	if s.failure == FakeFailureTerminationTimeout {
+	s.mu.Lock()
+	terminationTimeout := s.failure == FakeFailureTerminationTimeout
+	s.mu.Unlock()
+	if terminationTimeout {
 		<-ctx.Done()
 		s.mu.Lock()
 		s.state.State = ProviderStateCleanup