smatch_buf_size.c

   1 /*
   2  * smatch/smatch_buf_size.c
   3  *
   4  * Copyright (C) 2010 Dan Carpenter.
   5  *
   6  * Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 #include <stdlib.h>
  11 #include <errno.h>
  12 #include "parse.h"
  13 #include "smatch.h"
  14 #include "smatch_slist.h"
  15 #include "smatch_extra.h"
  16 #include "smatch_function_hashtable.h"
  17
  18 #define UNKNOWN_SIZE (-1)
  19
  20 static int my_size_id;
  21
  22 struct limiter {
  23         int buf_arg;
  24         int limit_arg;
  25 };
  26 static struct limiter b0_l2 = {0, 2};
  27
  28 static DEFINE_HASHTABLE_INSERT(insert_func, char, int);
  29 static DEFINE_HASHTABLE_SEARCH(search_func, char, int);
  30 static struct hashtable *allocation_funcs;
  31
  32 static char *get_fn_name(struct expression *expr)
  33 {
  34         if (expr->type != EXPR_CALL)
  35                 return NULL;
  36         if (expr->fn->type != EXPR_SYMBOL)
  37                 return NULL;
  38         return expr_to_var(expr->fn);
  39 }
  40
  41 static int is_allocation_function(struct expression *expr)
  42 {
  43         char *func;
  44         int ret = 0;
  45
  46         func = get_fn_name(expr);
  47         if (!func)
  48                 return 0;
  49         if (search_func(allocation_funcs, func))
  50                 ret = 1;
  51         free_string(func);
  52         return ret;
  53 }
  54
  55 static void add_allocation_function(const char *func, void *call_back, int param)
  56 {
  57         insert_func(allocation_funcs, (char *)func, (int *)1);
  58         add_function_assign_hook(func, call_back, INT_PTR(param));
  59 }
  60
  61 static int estate_to_size(struct smatch_state *state)
  62 {
  63         sval_t sval;
  64
  65         if (!state || !estate_rl(state))
  66                 return 0;
  67         sval = estate_max(state);
  68         return sval.value;
  69 }
  70
  71 static struct smatch_state *size_to_estate(int size)
  72 {
  73         sval_t sval;
  74
  75         sval.type = &int_ctype;
  76         sval.value = size;
  77
  78         return alloc_estate_sval(sval);
  79 }
  80
  81 static struct range_list *size_to_rl(int size)
  82 {
  83         sval_t sval;
  84
  85         sval.type = &int_ctype;
  86         sval.value = size;
  87
  88         return alloc_rl(sval, sval);
  89 }
  90
  91 static struct smatch_state *unmatched_size_state(struct sm_state *sm)
  92 {
  93         return size_to_estate(UNKNOWN_SIZE);
  94 }
  95
  96 static void set_size_undefined(struct sm_state *sm, struct expression *mod_expr)
  97 {
  98         set_state(sm->owner, sm->name, sm->sym, size_to_estate(UNKNOWN_SIZE));
  99 }
 100
 101 static struct smatch_state *merge_size_func(struct smatch_state *s1, struct smatch_state *s2)
 102 {
 103         return merge_estates(s1, s2);
 104 }
 105
 106 void set_param_buf_size(const char *name, struct symbol *sym, char *key, char *value)
 107 {
 108         struct range_list *rl = NULL;
 109         struct smatch_state *state;
 110         char fullname[256];
 111
 112         if (strncmp(key, "$$", 2) != 0)
 113                 return;
 114
 115         snprintf(fullname, 256, "%s%s", name, key + 2);
 116
 117         str_to_rl(&int_ctype, value, &rl);
 118         if (!rl || is_whole_rl(rl))
 119                 return;
 120         state = alloc_estate_rl(rl);
 121         set_state(my_size_id, fullname, sym, state);
 122 }
 123
 124 static int bytes_per_element(struct expression *expr)
 125 {
 126         struct symbol *type;
 127         int bpe;
 128
 129         if (expr->type == EXPR_STRING)
 130                 return 1;
 131         type = get_type(expr);
 132         if (!type)
 133                 return 0;
 134
 135         if (type->type != SYM_PTR && type->type != SYM_ARRAY)
 136                 return 0;
 137
 138         type = get_base_type(type);
 139         bpe = bits_to_bytes(type->bit_size);
 140
 141         if (bpe == -1) /* void pointer */
 142                 bpe = 1;
 143
 144         return bpe;
 145 }
 146
 147 static int bytes_to_elements(struct expression *expr, int bytes)
 148 {
 149         int bpe;
 150
 151         bpe = bytes_per_element(expr);
 152         if (bpe == 0)
 153                 return 0;
 154         return bytes / bpe;
 155 }
 156
 157 static int elements_to_bytes(struct expression *expr, int elements)
 158 {
 159         int bpe;
 160
 161         bpe = bytes_per_element(expr);
 162         return elements * bpe;
 163 }
 164
 165 static int get_initializer_size(struct expression *expr)
 166 {
 167         switch (expr->type) {
 168         case EXPR_STRING:
 169                 return expr->string->length;
 170         case EXPR_INITIALIZER: {
 171                 struct expression *tmp;
 172                 int i = 0;
 173
 174                 FOR_EACH_PTR(expr->expr_list, tmp) {
 175                         if (tmp->type == EXPR_INDEX) {
 176                                 if (tmp->idx_to >= i)
 177                                         i = tmp->idx_to;
 178                                 else
 179                                         continue;
 180                         }
 181
 182                         i++;
 183                 } END_FOR_EACH_PTR(tmp);
 184                 return i;
 185         }
 186         case EXPR_SYMBOL:
 187                 return get_array_size(expr);
 188         }
 189         return 0;
 190 }
 191
 192 static struct range_list *db_size_rl;
 193 static int db_size_callback(void *unused, int argc, char **argv, char **azColName)
 194 {
 195         struct range_list *tmp = NULL;
 196
 197         if (!db_size_rl) {
 198                 str_to_rl(&int_ctype, argv[0], &db_size_rl);
 199         } else {
 200                 str_to_rl(&int_ctype, argv[0], &tmp);
 201                 db_size_rl = rl_union(db_size_rl, tmp);
 202         }
 203         return 0;
 204 }
 205
 206 static struct range_list *size_from_db(struct expression *expr)
 207 {
 208         int this_file_only = 0;
 209         char *name;
 210
 211         name = get_member_name(expr);
 212         if (!name && is_static(expr)) {
 213                 name = expr_to_var(expr);
 214                 this_file_only = 1;
 215         }
 216         if (!name)
 217                 return 0;
 218
 219         if (this_file_only) {
 220                 db_size_rl = NULL;
 221                 run_sql(db_size_callback, "select size from function_type_size where type = '%s' and file = '%s'",
 222                                 name, get_filename());
 223                 if (db_size_rl)
 224                         return db_size_rl;
 225                 return 0;
 226         }
 227
 228         db_size_rl = NULL;
 229         run_sql(db_size_callback, "select size from type_size where type = '%s'",
 230                         name);
 231         return db_size_rl;
 232 }
 233
 234 static void db_returns_buf_size(struct expression *expr, int param, char *unused, char *math)
 235 {
 236         struct expression *call;
 237         sval_t sval;
 238
 239         if (expr->type != EXPR_ASSIGNMENT)
 240                 return;
 241         call = strip_expr(expr->right);
 242
 243         if (!parse_call_math(call, math, &sval))
 244                 return;
 245         set_state_expr(my_size_id, expr->left, size_to_estate(sval.value));
 246 }
 247
 248 int get_real_array_size(struct expression *expr)
 249 {
 250         struct symbol *type;
 251         sval_t sval;
 252
 253         if (expr->type == EXPR_BINOP) /* array elements foo[5] */
 254                 return 0;
 255
 256         type = get_type(expr);
 257         if (!type || type->type != SYM_ARRAY)
 258                 return 0;
 259
 260         if (!get_implied_value(type->array_size, &sval))
 261                 return 0;
 262
 263         /* People put one element arrays on the end of structs */
 264         if (sval.value == 1)
 265                 return 0;
 266
 267         return sval.value;
 268 }
 269
 270 static int get_size_from_initializer(struct expression *expr)
 271 {
 272         if (expr->type != EXPR_SYMBOL || !expr->symbol || !expr->symbol->initializer)
 273                 return 0;
 274         if (expr->symbol->initializer == expr) /* int a = a; */
 275                 return 0;
 276         return get_initializer_size(expr->symbol->initializer);
 277 }
 278
 279 static struct range_list *get_stored_size_bytes(struct expression *expr)
 280 {
 281         struct smatch_state *state;
 282
 283         state = get_state_expr(my_size_id, expr);
 284         if (!state)
 285                 return NULL;
 286         return estate_rl(state);
 287 }
 288
 289 static int get_bytes_from_address(struct expression *expr)
 290 {
 291         struct symbol *type;
 292         int ret;
 293
 294         if (!option_spammy)
 295                 return 0;
 296         if (expr->type != EXPR_PREOP || expr->op != '&')
 297                 return 0;
 298         type = get_type(expr);
 299         if (!type)
 300                 return 0;
 301
 302         if (type->type == SYM_PTR)
 303                 type = get_base_type(type);
 304
 305         ret = bits_to_bytes(type->bit_size);
 306         if (ret == -1)
 307                 return 0;
 308         if (ret == 1)
 309                 return 0;  /* ignore char pointers */
 310
 311         return ret;
 312 }
 313
 314 static struct expression *remove_addr_fluff(struct expression *expr)
 315 {
 316         struct expression *tmp;
 317         sval_t sval;
 318
 319         expr = strip_expr(expr);
 320
 321         /* remove '&' and '*' operations that cancel */
 322         while (expr && expr->type == EXPR_PREOP && expr->op == '&') {
 323                 tmp = strip_expr(expr->unop);
 324                 if (tmp->type != EXPR_PREOP)
 325                         break;
 326                 if (tmp->op != '*')
 327                         break;
 328                 expr = strip_expr(tmp->unop);
 329         }
 330
 331         if (!expr)
 332                 return NULL;
 333
 334         /* "foo + 0" is just "foo" */
 335         if (expr->type == EXPR_BINOP && expr->op == '+' &&
 336             get_value(expr->right, &sval) && sval.value == 0)
 337                 return expr->left;
 338
 339         return expr;
 340 }
 341
 342 static int is_last_member_of_struct(struct symbol *sym, struct ident *member)
 343 {
 344         struct symbol *tmp;
 345         int i;
 346
 347         i = 0;
 348         FOR_EACH_PTR_REVERSE(sym->symbol_list, tmp) {
 349                 if (i++ || !tmp->ident)
 350                         return 0;
 351                 if (tmp->ident == member)
 352                         return 1;
 353                 return 0;
 354         } END_FOR_EACH_PTR_REVERSE(tmp);
 355
 356         return 0;
 357 }
 358
 359 static int get_stored_size_end_struct_bytes(struct expression *expr)
 360 {
 361         struct symbol *type;
 362         char *name;
 363         struct symbol *sym;
 364         struct smatch_state *state;
 365         sval_t sval;
 366
 367         if (expr->type == EXPR_BINOP) /* array elements foo[5] */
 368                 return 0;
 369
 370         type = get_type(expr);
 371         if (!type || type->type != SYM_ARRAY)
 372                 return 0;
 373
 374         if (!get_implied_value(type->array_size, &sval))
 375                 return 0;
 376
 377         if (sval.value != 0 && sval.value != 1)
 378                 return 0;
 379
 380         name = expr_to_var_sym(expr, &sym);
 381         free_string(name);
 382         if (!sym || !sym->ident || !sym->ident->name)
 383                 return 0;
 384         if (!sym->bit_size)
 385                 return 0;
 386
 387         if (sym->type != SYM_NODE)
 388                 return 0;
 389
 390         state = get_state(my_size_id, sym->ident->name, sym);
 391         if (!estate_to_size(state))
 392                 return 0;
 393
 394         sym = get_real_base_type(sym);
 395         if (!sym || sym->type != SYM_PTR)
 396                 return 0;
 397         sym = get_real_base_type(sym);
 398         if (!sym || sym->type != SYM_STRUCT)
 399                 return 0;
 400         if (!is_last_member_of_struct(sym, expr->member))
 401                 return 0;
 402
 403         return estate_to_size(state) - bits_to_bytes(sym->bit_size) +
 404                 bits_to_bytes(type->bit_size);
 405 }
 406
 407 static struct range_list *alloc_int_rl(int value)
 408 {
 409         sval_t sval = {
 410                 .type = &int_ctype,
 411                 .value = value,
 412         };
 413
 414         return alloc_rl(sval, sval);
 415 }
 416
 417 struct range_list *get_array_size_bytes_rl(struct expression *expr)
 418 {
 419         int declared_size = 0;
 420         struct range_list *ret = NULL;
 421         int size;
 422
 423         expr = remove_addr_fluff(expr);
 424         if (!expr)
 425                 return NULL;
 426
 427         /* "BAR" */
 428         if (expr->type == EXPR_STRING)
 429                 return alloc_int_rl(expr->string->length);
 430
 431         /* buf[4] */
 432         size = get_real_array_size(expr);
 433         if (size)
 434                 declared_size = elements_to_bytes(expr, size);
 435
 436         /* buf = malloc(1024); */
 437         ret = get_stored_size_bytes(expr);
 438         if (ret) {
 439                 if (declared_size)
 440                         return rl_union(ret, alloc_int_rl(size));
 441                 return ret;
 442         }
 443         if (declared_size)
 444                 return alloc_int_rl(declared_size);
 445
 446         size = get_stored_size_end_struct_bytes(expr);
 447         if (size)
 448                 return alloc_int_rl(size);
 449
 450         /* char *foo = "BAR" */
 451         size = get_size_from_initializer(expr);
 452         if (size)
 453                 return alloc_int_rl(elements_to_bytes(expr, size));
 454
 455         size = get_bytes_from_address(expr);
 456         if (size)
 457                 return alloc_int_rl(size);
 458
 459         /* if (strlen(foo) > 4) */
 460         size = get_size_from_strlen(expr);
 461         if (size)
 462                 return alloc_int_rl(size);
 463
 464         ret = size_from_db(expr);
 465         if (ret)
 466                 return ret;
 467
 468         return NULL;
 469 }
 470
 471 int get_array_size_bytes(struct expression *expr)
 472 {
 473         struct range_list *rl;
 474         sval_t sval;
 475
 476         rl = get_array_size_bytes_rl(expr);
 477         if (!rl_to_sval(rl, &sval))
 478                 return 0;
 479         if (sval.uvalue >= INT_MAX)
 480                 return 0;
 481         return sval.value;
 482 }
 483
 484 int get_array_size_bytes_max(struct expression *expr)
 485 {
 486         struct range_list *rl;
 487         sval_t bytes;
 488
 489         rl = get_array_size_bytes_rl(expr);
 490         if (!rl)
 491                 return 0;
 492         bytes = rl_min(rl);
 493         if (bytes.value < 0)
 494                 return 0;
 495         bytes = rl_max(rl);
 496         if (bytes.uvalue >= INT_MAX)
 497                 return 0;
 498         return bytes.value;
 499 }
 500
 501 int get_array_size_bytes_min(struct expression *expr)
 502 {
 503         struct range_list *rl;
 504         struct data_range *range;
 505
 506         rl = get_array_size_bytes_rl(expr);
 507         if (!rl)
 508                 return 0;
 509
 510         FOR_EACH_PTR(rl, range) {
 511                 if (range->min.value <= 0)
 512                         return 0;
 513                 if (range->max.value <= 0)
 514                         return 0;
 515                 if (range->min.uvalue >= INT_MAX)
 516                         return 0;
 517                 return range->min.value;
 518         } END_FOR_EACH_PTR(range);
 519
 520         return 0;
 521 }
 522
 523 int get_array_size(struct expression *expr)
 524 {
 525         return bytes_to_elements(expr, get_array_size_bytes_max(expr));
 526 }
 527
 528 static void match_strlen_condition(struct expression *expr)
 529 {
 530         struct expression *left;
 531         struct expression *right;
 532         struct expression *str = NULL;
 533         int strlen_left = 0;
 534         int strlen_right = 0;
 535         sval_t sval;
 536         struct smatch_state *true_state = NULL;
 537         struct smatch_state *false_state = NULL;
 538
 539         if (expr->type != EXPR_COMPARE)
 540                 return;
 541         left = strip_expr(expr->left);
 542         right = strip_expr(expr->right);
 543
 544         if (left->type == EXPR_CALL && sym_name_is("strlen", left->fn)) {
 545                 str = get_argument_from_call_expr(left->args, 0);
 546                 strlen_left = 1;
 547         }
 548         if (right->type == EXPR_CALL && sym_name_is("strlen", right->fn)) {
 549                 str = get_argument_from_call_expr(right->args, 0);
 550                 strlen_right = 1;
 551         }
 552
 553         if (!strlen_left && !strlen_right)
 554                 return;
 555         if (strlen_left && strlen_right)
 556                 return;
 557
 558         if (strlen_left) {
 559                 if (!get_value(right, &sval))
 560                         return;
 561         }
 562         if (strlen_right) {
 563                 if (!get_value(left, &sval))
 564                         return;
 565         }
 566
 567         /* FIXME:  why are we using my_size_id here instead of my_strlen_id */
 568
 569         if (expr->op == SPECIAL_EQUAL) {
 570                 set_true_false_states_expr(my_size_id, str, size_to_estate(sval.value + 1), NULL);
 571                 return;
 572         }
 573         if (expr->op == SPECIAL_NOTEQUAL) {
 574                 set_true_false_states_expr(my_size_id, str, NULL, size_to_estate(sval.value + 1));
 575                 return;
 576         }
 577
 578         switch (expr->op) {
 579         case '<':
 580         case SPECIAL_UNSIGNED_LT:
 581                 if (strlen_left)
 582                         true_state = size_to_estate(sval.value);
 583                 else
 584                         false_state = size_to_estate(sval.value + 1);
 585                 break;
 586         case SPECIAL_LTE:
 587         case SPECIAL_UNSIGNED_LTE:
 588                 if (strlen_left)
 589                         true_state = size_to_estate(sval.value + 1);
 590                 else
 591                         false_state = size_to_estate(sval.value);
 592                 break;
 593         case SPECIAL_GTE:
 594         case SPECIAL_UNSIGNED_GTE:
 595                 if (strlen_left)
 596                         false_state = size_to_estate(sval.value);
 597                 else
 598                         true_state = size_to_estate(sval.value + 1);
 599                 break;
 600         case '>':
 601         case SPECIAL_UNSIGNED_GT:
 602                 if (strlen_left)
 603                         false_state = size_to_estate(sval.value + 1);
 604                 else
 605                         true_state = size_to_estate(sval.value);
 606                 break;
 607         }
 608         set_true_false_states_expr(my_size_id, str, true_state, false_state);
 609 }
 610
 611 static struct expression *strip_ampersands(struct expression *expr)
 612 {
 613         struct symbol *type;
 614
 615         if (expr->type != EXPR_PREOP)
 616                 return expr;
 617         if (expr->op != '&')
 618                 return expr;
 619         type = get_type(expr->unop);
 620         if (!type || type->type != SYM_ARRAY)
 621                 return expr;
 622         return expr->unop;
 623 }
 624
 625 static void info_record_alloction(struct expression *buffer, struct range_list *rl)
 626 {
 627         char *name;
 628
 629         if (!option_info)
 630                 return;
 631
 632         name = get_member_name(buffer);
 633         if (!name && is_static(buffer))
 634                 name = expr_to_var(buffer);
 635         if (!name)
 636                 return;
 637         if (rl && !is_whole_rl(rl))
 638                 sql_insert_function_type_size(name, show_rl(rl));
 639         else
 640                 sql_insert_function_type_size(name, "(-1)");
 641
 642         free_string(name);
 643 }
 644
 645 static void store_alloc(struct expression *expr, struct range_list *rl)
 646 {
 647         rl = clone_rl(rl); // FIXME!!!
 648         info_record_alloction(expr, rl);
 649         set_state_expr(my_size_id, expr, alloc_estate_rl(rl));
 650 }
 651
 652 static void match_array_assignment(struct expression *expr)
 653 {
 654         struct expression *left;
 655         struct expression *right;
 656         struct range_list *rl;
 657         sval_t sval;
 658
 659         if (expr->op != '=')
 660                 return;
 661         left = strip_expr(expr->left);
 662         right = strip_expr(expr->right);
 663         right = strip_ampersands(right);
 664
 665         if (is_allocation_function(right))
 666                 return;
 667
 668         if (get_implied_value(right, &sval) && sval.value == 0) {
 669                 rl = alloc_int_rl(0);
 670                 goto store;
 671         }
 672
 673         rl = get_array_size_bytes_rl(right);
 674
 675 store:
 676         store_alloc(left, rl);
 677 }
 678
 679 static void match_alloc(const char *fn, struct expression *expr, void *_size_arg)
 680 {
 681         int size_arg = PTR_INT(_size_arg);
 682         struct expression *right;
 683         struct expression *arg;
 684         struct range_list *rl;
 685
 686         right = strip_expr(expr->right);
 687         arg = get_argument_from_call_expr(right->args, size_arg);
 688         get_absolute_rl(arg, &rl);
 689         rl = cast_rl(&int_ctype, rl);
 690         store_alloc(expr->left, rl);
 691 }
 692
 693 static void match_calloc(const char *fn, struct expression *expr, void *unused)
 694 {
 695         struct expression *right;
 696         struct expression *arg;
 697         sval_t elements;
 698         sval_t size;
 699
 700         right = strip_expr(expr->right);
 701         arg = get_argument_from_call_expr(right->args, 0);
 702         if (!get_implied_value(arg, &elements))
 703                 return; // FIXME!!!
 704         arg = get_argument_from_call_expr(right->args, 1);
 705         if (get_implied_value(arg, &size))
 706                 store_alloc(expr->left, size_to_rl(elements.value * size.value));
 707         else
 708                 store_alloc(expr->left, size_to_rl(-1));
 709 }
 710
 711 static void match_limited(const char *fn, struct expression *expr, void *_limiter)
 712 {
 713         struct limiter *limiter = (struct limiter *)_limiter;
 714         struct expression *dest;
 715         struct expression *size_expr;
 716         sval_t size;
 717
 718         dest = get_argument_from_call_expr(expr->args, limiter->buf_arg);
 719         size_expr = get_argument_from_call_expr(expr->args, limiter->limit_arg);
 720         if (!get_implied_max(size_expr, &size))
 721                 return;
 722         set_state_expr(my_size_id, dest, size_to_estate(size.value));
 723 }
 724
 725 static void match_strcpy(const char *fn, struct expression *expr, void *unused)
 726 {
 727         struct expression fake_assign;
 728
 729         fake_assign.op = '=';
 730         fake_assign.left = get_argument_from_call_expr(expr->args, 0);
 731         fake_assign.right = get_argument_from_call_expr(expr->args, 1);
 732         match_array_assignment(&fake_assign);
 733 }
 734
 735 static void match_strndup(const char *fn, struct expression *expr, void *unused)
 736 {
 737         struct expression *fn_expr;
 738         struct expression *size_expr;
 739         sval_t size;
 740
 741         fn_expr = strip_expr(expr->right);
 742         size_expr = get_argument_from_call_expr(fn_expr->args, 1);
 743         if (get_implied_max(size_expr, &size)) {
 744                 size.value++;
 745                 store_alloc(expr->left, size_to_rl(size.value));
 746         } else {
 747                 store_alloc(expr->left, size_to_rl(-1));
 748         }
 749
 750 }
 751
 752 static void match_call(struct expression *expr)
 753 {
 754         struct expression *arg;
 755         struct range_list *rl;
 756         int i;
 757
 758         i = 0;
 759         FOR_EACH_PTR(expr->args, arg) {
 760                 rl = get_array_size_bytes_rl(arg);
 761                 if (rl && !is_whole_rl(rl))
 762                         sql_insert_caller_info(expr, BUF_SIZE, i, "$$", show_rl(rl));
 763                 i++;
 764         } END_FOR_EACH_PTR(arg);
 765 }
 766
 767 static void struct_member_callback(struct expression *call, int param, char *printed_name, struct smatch_state *state)
 768 {
 769         if (state == &merged)
 770                 return;
 771         sql_insert_caller_info(call, BUF_SIZE, param, printed_name, state->name);
 772 }
 773
 774 void register_buf_size(int id)
 775 {
 776         my_size_id = id;
 777
 778         add_unmatched_state_hook(my_size_id, &unmatched_size_state);
 779
 780         select_caller_info_hook(set_param_buf_size, BUF_SIZE);
 781         select_return_states_hook(BUF_SIZE, &db_returns_buf_size);
 782
 783         allocation_funcs = create_function_hashtable(100);
 784         add_allocation_function("malloc", &match_alloc, 0);
 785         add_allocation_function("calloc", &match_calloc, 0);
 786         add_allocation_function("memdup", &match_alloc, 1);
 787         if (option_project == PROJ_KERNEL) {
 788                 add_allocation_function("kmalloc", &match_alloc, 0);
 789                 add_allocation_function("kzalloc", &match_alloc, 0);
 790                 add_allocation_function("vmalloc", &match_alloc, 0);
 791                 add_allocation_function("__vmalloc", &match_alloc, 0);
 792                 add_allocation_function("kcalloc", &match_calloc, 0);
 793                 add_allocation_function("kmalloc_array", &match_calloc, 0);
 794                 add_allocation_function("drm_malloc_ab", &match_calloc, 0);
 795                 add_allocation_function("drm_calloc_large", &match_calloc, 0);
 796                 add_allocation_function("sock_kmalloc", &match_alloc, 1);
 797                 add_allocation_function("kmemdup", &match_alloc, 1);
 798                 add_allocation_function("kmemdup_user", &match_alloc, 1);
 799                 add_allocation_function("dma_alloc_attrs", &match_alloc, 1);
 800                 add_allocation_function("pci_alloc_consistent", &match_alloc, 1);
 801                 add_allocation_function("pci_alloc_coherent", &match_alloc, 1);
 802                 add_allocation_function("devm_kmalloc", &match_alloc, 1);
 803                 add_allocation_function("devm_kzalloc", &match_alloc, 1);
 804         }
 805         add_hook(&match_strlen_condition, CONDITION_HOOK);
 806
 807         add_allocation_function("strndup", match_strndup, 0);
 808         if (option_project == PROJ_KERNEL)
 809                 add_allocation_function("kstrndup", match_strndup, 0);
 810
 811         add_modification_hook(my_size_id, &set_size_undefined);
 812
 813         add_merge_hook(my_size_id, &merge_size_func);
 814 }
 815
 816 void register_buf_size_late(int id)
 817 {
 818         /* has to happen after match_alloc() */
 819         add_hook(&match_array_assignment, ASSIGNMENT_HOOK);
 820
 821         add_function_hook("strlcpy", &match_limited, &b0_l2);
 822         add_function_hook("strlcat", &match_limited, &b0_l2);
 823         add_function_hook("memscan", &match_limited, &b0_l2);
 824
 825         add_function_hook("strcpy", &match_strcpy, NULL);
 826
 827         add_hook(&match_call, FUNCTION_CALL_HOOK);
 828         add_member_info_callback(my_size_id, struct_member_callback);
 829 }