Suricata

We tend to execute

           ptmp = FTPRealloc(line_state->db, line_state->db_len,
                             (line_state->db_len + state->input_len));
            if (ptmp == NULL) {
                FTPFree(line_state->db, line_state->db_len);
                line_state->db = NULL;
                line_state->db_len = 0; 
                return -1;
            }
            line_state->db = ptmp;

            memcpy(line_state->db + line_state->db_len,
                   state->input, state->input_len);
            line_state->db_len += state->input_len;
        }    
        state->input += state->input_len;
        state->input_len = 0; 

indefinitely.