# DF-2412 fix (authored post-verification; not applied to sys/)
--- a/sys/dev/disk/advansys/advansys.c
+++ b/sys/dev/disk/advansys/advansys.c
@@ -1182,6 +1182,10 @@ adv_done(struct adv_softc *adv, union ccb *ccb, u_int done_stat,
 			case SCSI_STATUS_CMD_TERMINATED:
 				ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
+				if (q_no == 0 ||
+				    q_no > adv->max_openings) {
+					/* bogus firmware q_no */
+					break;
+				}
 				/* Structure copy */
 				ccb->csio.sense_data =
 				    adv->sense_buffers[q_no - 1];