Index: sys/cam/ctl/ctl_frontend_iscsi.c
===================================================================
--- sys/cam/ctl/ctl_frontend_iscsi.c
+++ sys/cam/ctl/ctl_frontend_iscsi.c
@@ -1582,8 +1582,10 @@
 	mtx_lock(&softc->lock);
 	if (ct->ct_online == 0) {
 		mtx_unlock(&softc->lock);
+		CFISCSI_SESSION_LOCK(cs);
 		cs->cs_handoff_in_progress = false;
 		cfiscsi_session_terminate(cs);
+		CFISCSI_SESSION_UNLOCK(cs);
 		cfiscsi_target_release(ct);
 		ci->status = CTL_ISCSI_ERROR;
 		snprintf(ci->error_str, sizeof(ci->error_str),