*** 345,359 ****
--- 345,361 ----
          if (error)
                  goto done;
  
  
          /* open file table */
+         mutex_enter(&p->p_lock);
          vroot = PTOU(p)->u_rdir;
          if (vroot == NULL)
                  vroot = rootdir;
  
          VN_HOLD(vroot);
+         mutex_exit(&p->p_lock);
  
          fip = P_FINFO(p);
  
          for (fd = 0; fd < fip->fi_nfiles; fd++) {
                  uf_entry_t *ufp;