ceph: fix leak of osd authorizer

Release the ceph_authorizer when releasing osd state.
Signed-off-by: NSage Weil <sage@newdream.net>

fs/ceph/osd_client.c

@@ -361,8 +361,13 @@ static void put_osd(struct ceph_osd *osd)
 {
 	dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
 	     atomic_read(&osd->o_ref) - 1);
-	if (atomic_dec_and_test(&osd->o_ref))
+	if (atomic_dec_and_test(&osd->o_ref)) {
+		struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
+
+		if (osd->o_authorizer)
+			ac->ops->destroy_authorizer(ac, osd->o_authorizer);
 		kfree(osd);
+	}
 }
 
 /*