check_uninitialized_kobj.c

   1 /*
   2  * Copyright (C) 2023 Oracle.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
  16  */
  17
  18 #include "smatch.h"
  19 #include "smatch_slist.h"
  20 #include "smatch_extra.h"
  21
  22 static int my_id;
  23
  24 static void match_kobject_function(struct expression *expr, const char *name,
  25                                    struct symbol *sym, void *data)
  26 {
  27         struct sm_state *sm, *tmp;
  28
  29         if (db_incomplete())
  30                 return;
  31
  32         sm = get_sm_state(SMATCH_EXTRA, name, sym);
  33         if (!sm)
  34                 return;
  35
  36         FOR_EACH_PTR(sm->possible, tmp) {
  37                 if (rl_max(estate_rl(tmp->state)).value == 0)
  38                         sm_warning("Calling kobject_put|get with state->initialized unset from line: %d",
  39                                    tmp->line);
  40         } END_FOR_EACH_PTR(tmp);
  41 }
  42
  43 void check_uninitialized_kobj(int id)
  44 {
  45         my_id = id;
  46
  47         if (option_project != PROJ_KERNEL)
  48                 return;
  49
  50         add_function_param_key_hook("kobject_put", &match_kobject_function, 0,
  51                                     "$->state_initialized", NULL);
  52         add_function_param_key_hook("kobject_get", &match_kobject_function, 0,
  53                                     "$->state_initialized", NULL);
  54 }