osd: don't crash on invalid encoded clone_range

diff --git a/src/messages/MOSDOp.h b/src/messages/MOSDOp.h
index 0c0bad616d117a05ec9d64d6aa777bb0a2d4b154..37a50ed6a0dc293ad61667ae7aa1ca019f8a8a67 100644 (file)
--- a/src/messages/MOSDOp.h
+++ b/src/messages/MOSDOp.h
@@ -329,7 +329,8 @@ struct ceph_osd_request_head {
        bufferlist t;
        ops[i].data.substr_of(t, off, ops[i].op.payload_len);
        off += ops[i].op.payload_len;
-       oid.name = t.c_str();
+        if (t.length())
+         oid.name = t.c_str();
       } else {
        ops[i].data.substr_of(data, off, ops[i].op.payload_len);
        off += ops[i].op.payload_len;