diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index a4b0dd8672ec..d6282f0bcff8 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -2809,9 +2809,10 @@ static void get_temp_osds(struct ceph_osdmap *osdmap,
 		}
 	}
 
-	/* primary_temp? */
+	/* primary_temp? (shouldn't ever be a nonexistent or down OSD) */
 	pg = lookup_pg_mapping(&osdmap->primary_temp, pgid);
-	if (pg)
+	if (pg && !WARN_ON_ONCE(ceph_osd_is_down(osdmap,
+						 pg->primary_temp.osd)))
 		temp->primary = pg->primary_temp.osd;
 }