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33#include <linux/kernel.h>
34#include <linux/sched.h>
35#include <linux/slab.h>
36#include <linux/string.h>
37#include <linux/errno.h>
38#include <linux/audit.h>
39#include <linux/flex_array.h>
40#include "security.h"
41
42#include "policydb.h"
43#include "conditional.h"
44#include "mls.h"
45#include "services.h"
46
47#define _DEBUG_HASHES
48
49#ifdef DEBUG_HASHES
50static const char *symtab_name[SYM_NUM] = {
51 "common prefixes",
52 "classes",
53 "roles",
54 "types",
55 "users",
56 "bools",
57 "levels",
58 "categories",
59};
60#endif
61
62static unsigned int symtab_sizes[SYM_NUM] = {
63 2,
64 32,
65 16,
66 512,
67 128,
68 16,
69 16,
70 16,
71};
72
73struct policydb_compat_info {
74 int version;
75 int sym_num;
76 int ocon_num;
77};
78
79
80static struct policydb_compat_info policydb_compat[] = {
81 {
82 .version = POLICYDB_VERSION_BASE,
83 .sym_num = SYM_NUM - 3,
84 .ocon_num = OCON_NUM - 3,
85 },
86 {
87 .version = POLICYDB_VERSION_BOOL,
88 .sym_num = SYM_NUM - 2,
89 .ocon_num = OCON_NUM - 3,
90 },
91 {
92 .version = POLICYDB_VERSION_IPV6,
93 .sym_num = SYM_NUM - 2,
94 .ocon_num = OCON_NUM - 2,
95 },
96 {
97 .version = POLICYDB_VERSION_NLCLASS,
98 .sym_num = SYM_NUM - 2,
99 .ocon_num = OCON_NUM - 2,
100 },
101 {
102 .version = POLICYDB_VERSION_MLS,
103 .sym_num = SYM_NUM,
104 .ocon_num = OCON_NUM - 2,
105 },
106 {
107 .version = POLICYDB_VERSION_AVTAB,
108 .sym_num = SYM_NUM,
109 .ocon_num = OCON_NUM - 2,
110 },
111 {
112 .version = POLICYDB_VERSION_RANGETRANS,
113 .sym_num = SYM_NUM,
114 .ocon_num = OCON_NUM - 2,
115 },
116 {
117 .version = POLICYDB_VERSION_POLCAP,
118 .sym_num = SYM_NUM,
119 .ocon_num = OCON_NUM - 2,
120 },
121 {
122 .version = POLICYDB_VERSION_PERMISSIVE,
123 .sym_num = SYM_NUM,
124 .ocon_num = OCON_NUM - 2,
125 },
126 {
127 .version = POLICYDB_VERSION_BOUNDARY,
128 .sym_num = SYM_NUM,
129 .ocon_num = OCON_NUM - 2,
130 },
131 {
132 .version = POLICYDB_VERSION_FILENAME_TRANS,
133 .sym_num = SYM_NUM,
134 .ocon_num = OCON_NUM - 2,
135 },
136 {
137 .version = POLICYDB_VERSION_ROLETRANS,
138 .sym_num = SYM_NUM,
139 .ocon_num = OCON_NUM - 2,
140 },
141 {
142 .version = POLICYDB_VERSION_NEW_OBJECT_DEFAULTS,
143 .sym_num = SYM_NUM,
144 .ocon_num = OCON_NUM - 2,
145 },
146 {
147 .version = POLICYDB_VERSION_DEFAULT_TYPE,
148 .sym_num = SYM_NUM,
149 .ocon_num = OCON_NUM - 2,
150 },
151 {
152 .version = POLICYDB_VERSION_CONSTRAINT_NAMES,
153 .sym_num = SYM_NUM,
154 .ocon_num = OCON_NUM - 2,
155 },
156 {
157 .version = POLICYDB_VERSION_XPERMS_IOCTL,
158 .sym_num = SYM_NUM,
159 .ocon_num = OCON_NUM - 2,
160 },
161 {
162 .version = POLICYDB_VERSION_INFINIBAND,
163 .sym_num = SYM_NUM,
164 .ocon_num = OCON_NUM,
165 },
166};
167
168static struct policydb_compat_info *policydb_lookup_compat(int version)
169{
170 int i;
171 struct policydb_compat_info *info = NULL;
172
173 for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
174 if (policydb_compat[i].version == version) {
175 info = &policydb_compat[i];
176 break;
177 }
178 }
179 return info;
180}
181
182
183
184
185static int roles_init(struct policydb *p)
186{
187 char *key = NULL;
188 int rc;
189 struct role_datum *role;
190
191 role = kzalloc(sizeof(*role), GFP_KERNEL);
192 if (!role)
193 return -ENOMEM;
194
195 rc = -EINVAL;
196 role->value = ++p->p_roles.nprim;
197 if (role->value != OBJECT_R_VAL)
198 goto out;
199
200 rc = -ENOMEM;
201 key = kstrdup(OBJECT_R, GFP_KERNEL);
202 if (!key)
203 goto out;
204
205 rc = hashtab_insert(p->p_roles.table, key, role);
206 if (rc)
207 goto out;
208
209 return 0;
210out:
211 kfree(key);
212 kfree(role);
213 return rc;
214}
215
216static u32 filenametr_hash(struct hashtab *h, const void *k)
217{
218 const struct filename_trans *ft = k;
219 unsigned long hash;
220 unsigned int byte_num;
221 unsigned char focus;
222
223 hash = ft->stype ^ ft->ttype ^ ft->tclass;
224
225 byte_num = 0;
226 while ((focus = ft->name[byte_num++]))
227 hash = partial_name_hash(focus, hash);
228 return hash & (h->size - 1);
229}
230
231static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2)
232{
233 const struct filename_trans *ft1 = k1;
234 const struct filename_trans *ft2 = k2;
235 int v;
236
237 v = ft1->stype - ft2->stype;
238 if (v)
239 return v;
240
241 v = ft1->ttype - ft2->ttype;
242 if (v)
243 return v;
244
245 v = ft1->tclass - ft2->tclass;
246 if (v)
247 return v;
248
249 return strcmp(ft1->name, ft2->name);
250
251}
252
253static u32 rangetr_hash(struct hashtab *h, const void *k)
254{
255 const struct range_trans *key = k;
256 return (key->source_type + (key->target_type << 3) +
257 (key->target_class << 5)) & (h->size - 1);
258}
259
260static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2)
261{
262 const struct range_trans *key1 = k1, *key2 = k2;
263 int v;
264
265 v = key1->source_type - key2->source_type;
266 if (v)
267 return v;
268
269 v = key1->target_type - key2->target_type;
270 if (v)
271 return v;
272
273 v = key1->target_class - key2->target_class;
274
275 return v;
276}
277
278
279
280
281static int policydb_init(struct policydb *p)
282{
283 int i, rc;
284
285 memset(p, 0, sizeof(*p));
286
287 for (i = 0; i < SYM_NUM; i++) {
288 rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
289 if (rc)
290 goto out;
291 }
292
293 rc = avtab_init(&p->te_avtab);
294 if (rc)
295 goto out;
296
297 rc = roles_init(p);
298 if (rc)
299 goto out;
300
301 rc = cond_policydb_init(p);
302 if (rc)
303 goto out;
304
305 p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10));
306 if (!p->filename_trans) {
307 rc = -ENOMEM;
308 goto out;
309 }
310
311 p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
312 if (!p->range_tr) {
313 rc = -ENOMEM;
314 goto out;
315 }
316
317 ebitmap_init(&p->filename_trans_ttypes);
318 ebitmap_init(&p->policycaps);
319 ebitmap_init(&p->permissive_map);
320
321 return 0;
322out:
323 hashtab_destroy(p->filename_trans);
324 hashtab_destroy(p->range_tr);
325 for (i = 0; i < SYM_NUM; i++)
326 hashtab_destroy(p->symtab[i].table);
327 return rc;
328}
329
330
331
332
333
334
335
336
337
338
339
340static int common_index(void *key, void *datum, void *datap)
341{
342 struct policydb *p;
343 struct common_datum *comdatum;
344 struct flex_array *fa;
345
346 comdatum = datum;
347 p = datap;
348 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
349 return -EINVAL;
350
351 fa = p->sym_val_to_name[SYM_COMMONS];
352 if (flex_array_put_ptr(fa, comdatum->value - 1, key,
353 GFP_KERNEL | __GFP_ZERO))
354 BUG();
355 return 0;
356}
357
358static int class_index(void *key, void *datum, void *datap)
359{
360 struct policydb *p;
361 struct class_datum *cladatum;
362 struct flex_array *fa;
363
364 cladatum = datum;
365 p = datap;
366 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
367 return -EINVAL;
368 fa = p->sym_val_to_name[SYM_CLASSES];
369 if (flex_array_put_ptr(fa, cladatum->value - 1, key,
370 GFP_KERNEL | __GFP_ZERO))
371 BUG();
372 p->class_val_to_struct[cladatum->value - 1] = cladatum;
373 return 0;
374}
375
376static int role_index(void *key, void *datum, void *datap)
377{
378 struct policydb *p;
379 struct role_datum *role;
380 struct flex_array *fa;
381
382 role = datum;
383 p = datap;
384 if (!role->value
385 || role->value > p->p_roles.nprim
386 || role->bounds > p->p_roles.nprim)
387 return -EINVAL;
388
389 fa = p->sym_val_to_name[SYM_ROLES];
390 if (flex_array_put_ptr(fa, role->value - 1, key,
391 GFP_KERNEL | __GFP_ZERO))
392 BUG();
393 p->role_val_to_struct[role->value - 1] = role;
394 return 0;
395}
396
397static int type_index(void *key, void *datum, void *datap)
398{
399 struct policydb *p;
400 struct type_datum *typdatum;
401 struct flex_array *fa;
402
403 typdatum = datum;
404 p = datap;
405
406 if (typdatum->primary) {
407 if (!typdatum->value
408 || typdatum->value > p->p_types.nprim
409 || typdatum->bounds > p->p_types.nprim)
410 return -EINVAL;
411 fa = p->sym_val_to_name[SYM_TYPES];
412 if (flex_array_put_ptr(fa, typdatum->value - 1, key,
413 GFP_KERNEL | __GFP_ZERO))
414 BUG();
415
416 fa = p->type_val_to_struct_array;
417 if (flex_array_put_ptr(fa, typdatum->value - 1, typdatum,
418 GFP_KERNEL | __GFP_ZERO))
419 BUG();
420 }
421
422 return 0;
423}
424
425static int user_index(void *key, void *datum, void *datap)
426{
427 struct policydb *p;
428 struct user_datum *usrdatum;
429 struct flex_array *fa;
430
431 usrdatum = datum;
432 p = datap;
433 if (!usrdatum->value
434 || usrdatum->value > p->p_users.nprim
435 || usrdatum->bounds > p->p_users.nprim)
436 return -EINVAL;
437
438 fa = p->sym_val_to_name[SYM_USERS];
439 if (flex_array_put_ptr(fa, usrdatum->value - 1, key,
440 GFP_KERNEL | __GFP_ZERO))
441 BUG();
442 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
443 return 0;
444}
445
446static int sens_index(void *key, void *datum, void *datap)
447{
448 struct policydb *p;
449 struct level_datum *levdatum;
450 struct flex_array *fa;
451
452 levdatum = datum;
453 p = datap;
454
455 if (!levdatum->isalias) {
456 if (!levdatum->level->sens ||
457 levdatum->level->sens > p->p_levels.nprim)
458 return -EINVAL;
459 fa = p->sym_val_to_name[SYM_LEVELS];
460 if (flex_array_put_ptr(fa, levdatum->level->sens - 1, key,
461 GFP_KERNEL | __GFP_ZERO))
462 BUG();
463 }
464
465 return 0;
466}
467
468static int cat_index(void *key, void *datum, void *datap)
469{
470 struct policydb *p;
471 struct cat_datum *catdatum;
472 struct flex_array *fa;
473
474 catdatum = datum;
475 p = datap;
476
477 if (!catdatum->isalias) {
478 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
479 return -EINVAL;
480 fa = p->sym_val_to_name[SYM_CATS];
481 if (flex_array_put_ptr(fa, catdatum->value - 1, key,
482 GFP_KERNEL | __GFP_ZERO))
483 BUG();
484 }
485
486 return 0;
487}
488
489static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
490{
491 common_index,
492 class_index,
493 role_index,
494 type_index,
495 user_index,
496 cond_index_bool,
497 sens_index,
498 cat_index,
499};
500
501#ifdef DEBUG_HASHES
502static void hash_eval(struct hashtab *h, const char *hash_name)
503{
504 struct hashtab_info info;
505
506 hashtab_stat(h, &info);
507 pr_debug("SELinux: %s: %d entries and %d/%d buckets used, "
508 "longest chain length %d\n", hash_name, h->nel,
509 info.slots_used, h->size, info.max_chain_len);
510}
511
512static void symtab_hash_eval(struct symtab *s)
513{
514 int i;
515
516 for (i = 0; i < SYM_NUM; i++)
517 hash_eval(s[i].table, symtab_name[i]);
518}
519
520#else
521static inline void hash_eval(struct hashtab *h, char *hash_name)
522{
523}
524#endif
525
526
527
528
529
530
531
532static int policydb_index(struct policydb *p)
533{
534 int i, rc;
535
536 if (p->mls_enabled)
537 pr_debug("SELinux: %d users, %d roles, %d types, %d bools, %d sens, %d cats\n",
538 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
539 p->p_bools.nprim, p->p_levels.nprim, p->p_cats.nprim);
540 else
541 pr_debug("SELinux: %d users, %d roles, %d types, %d bools\n",
542 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
543 p->p_bools.nprim);
544
545 pr_debug("SELinux: %d classes, %d rules\n",
546 p->p_classes.nprim, p->te_avtab.nel);
547
548#ifdef DEBUG_HASHES
549 avtab_hash_eval(&p->te_avtab, "rules");
550 symtab_hash_eval(p->symtab);
551#endif
552
553 p->class_val_to_struct = kcalloc(p->p_classes.nprim,
554 sizeof(*p->class_val_to_struct),
555 GFP_KERNEL);
556 if (!p->class_val_to_struct)
557 return -ENOMEM;
558
559 p->role_val_to_struct = kcalloc(p->p_roles.nprim,
560 sizeof(*p->role_val_to_struct),
561 GFP_KERNEL);
562 if (!p->role_val_to_struct)
563 return -ENOMEM;
564
565 p->user_val_to_struct = kcalloc(p->p_users.nprim,
566 sizeof(*p->user_val_to_struct),
567 GFP_KERNEL);
568 if (!p->user_val_to_struct)
569 return -ENOMEM;
570
571
572 p->type_val_to_struct_array = flex_array_alloc(sizeof(struct type_datum *),
573 p->p_types.nprim,
574 GFP_KERNEL | __GFP_ZERO);
575 if (!p->type_val_to_struct_array)
576 return -ENOMEM;
577
578 rc = flex_array_prealloc(p->type_val_to_struct_array, 0,
579 p->p_types.nprim, GFP_KERNEL | __GFP_ZERO);
580 if (rc)
581 goto out;
582
583 rc = cond_init_bool_indexes(p);
584 if (rc)
585 goto out;
586
587 for (i = 0; i < SYM_NUM; i++) {
588 p->sym_val_to_name[i] = flex_array_alloc(sizeof(char *),
589 p->symtab[i].nprim,
590 GFP_KERNEL | __GFP_ZERO);
591 if (!p->sym_val_to_name[i])
592 return -ENOMEM;
593
594 rc = flex_array_prealloc(p->sym_val_to_name[i],
595 0, p->symtab[i].nprim,
596 GFP_KERNEL | __GFP_ZERO);
597 if (rc)
598 goto out;
599
600 rc = hashtab_map(p->symtab[i].table, index_f[i], p);
601 if (rc)
602 goto out;
603 }
604 rc = 0;
605out:
606 return rc;
607}
608
609
610
611
612
613
614
615static int perm_destroy(void *key, void *datum, void *p)
616{
617 kfree(key);
618 kfree(datum);
619 return 0;
620}
621
622static int common_destroy(void *key, void *datum, void *p)
623{
624 struct common_datum *comdatum;
625
626 kfree(key);
627 if (datum) {
628 comdatum = datum;
629 hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
630 hashtab_destroy(comdatum->permissions.table);
631 }
632 kfree(datum);
633 return 0;
634}
635
636static void constraint_expr_destroy(struct constraint_expr *expr)
637{
638 if (expr) {
639 ebitmap_destroy(&expr->names);
640 if (expr->type_names) {
641 ebitmap_destroy(&expr->type_names->types);
642 ebitmap_destroy(&expr->type_names->negset);
643 kfree(expr->type_names);
644 }
645 kfree(expr);
646 }
647}
648
649static int cls_destroy(void *key, void *datum, void *p)
650{
651 struct class_datum *cladatum;
652 struct constraint_node *constraint, *ctemp;
653 struct constraint_expr *e, *etmp;
654
655 kfree(key);
656 if (datum) {
657 cladatum = datum;
658 hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
659 hashtab_destroy(cladatum->permissions.table);
660 constraint = cladatum->constraints;
661 while (constraint) {
662 e = constraint->expr;
663 while (e) {
664 etmp = e;
665 e = e->next;
666 constraint_expr_destroy(etmp);
667 }
668 ctemp = constraint;
669 constraint = constraint->next;
670 kfree(ctemp);
671 }
672
673 constraint = cladatum->validatetrans;
674 while (constraint) {
675 e = constraint->expr;
676 while (e) {
677 etmp = e;
678 e = e->next;
679 constraint_expr_destroy(etmp);
680 }
681 ctemp = constraint;
682 constraint = constraint->next;
683 kfree(ctemp);
684 }
685 kfree(cladatum->comkey);
686 }
687 kfree(datum);
688 return 0;
689}
690
691static int role_destroy(void *key, void *datum, void *p)
692{
693 struct role_datum *role;
694
695 kfree(key);
696 if (datum) {
697 role = datum;
698 ebitmap_destroy(&role->dominates);
699 ebitmap_destroy(&role->types);
700 }
701 kfree(datum);
702 return 0;
703}
704
705static int type_destroy(void *key, void *datum, void *p)
706{
707 kfree(key);
708 kfree(datum);
709 return 0;
710}
711
712static int user_destroy(void *key, void *datum, void *p)
713{
714 struct user_datum *usrdatum;
715
716 kfree(key);
717 if (datum) {
718 usrdatum = datum;
719 ebitmap_destroy(&usrdatum->roles);
720 ebitmap_destroy(&usrdatum->range.level[0].cat);
721 ebitmap_destroy(&usrdatum->range.level[1].cat);
722 ebitmap_destroy(&usrdatum->dfltlevel.cat);
723 }
724 kfree(datum);
725 return 0;
726}
727
728static int sens_destroy(void *key, void *datum, void *p)
729{
730 struct level_datum *levdatum;
731
732 kfree(key);
733 if (datum) {
734 levdatum = datum;
735 ebitmap_destroy(&levdatum->level->cat);
736 kfree(levdatum->level);
737 }
738 kfree(datum);
739 return 0;
740}
741
742static int cat_destroy(void *key, void *datum, void *p)
743{
744 kfree(key);
745 kfree(datum);
746 return 0;
747}
748
749static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
750{
751 common_destroy,
752 cls_destroy,
753 role_destroy,
754 type_destroy,
755 user_destroy,
756 cond_destroy_bool,
757 sens_destroy,
758 cat_destroy,
759};
760
761static int filenametr_destroy(void *key, void *datum, void *p)
762{
763 struct filename_trans *ft = key;
764 kfree(ft->name);
765 kfree(key);
766 kfree(datum);
767 cond_resched();
768 return 0;
769}
770
771static int range_tr_destroy(void *key, void *datum, void *p)
772{
773 struct mls_range *rt = datum;
774 kfree(key);
775 ebitmap_destroy(&rt->level[0].cat);
776 ebitmap_destroy(&rt->level[1].cat);
777 kfree(datum);
778 cond_resched();
779 return 0;
780}
781
782static void ocontext_destroy(struct ocontext *c, int i)
783{
784 if (!c)
785 return;
786
787 context_destroy(&c->context[0]);
788 context_destroy(&c->context[1]);
789 if (i == OCON_ISID || i == OCON_FS ||
790 i == OCON_NETIF || i == OCON_FSUSE)
791 kfree(c->u.name);
792 kfree(c);
793}
794
795
796
797
798void policydb_destroy(struct policydb *p)
799{
800 struct ocontext *c, *ctmp;
801 struct genfs *g, *gtmp;
802 int i;
803 struct role_allow *ra, *lra = NULL;
804 struct role_trans *tr, *ltr = NULL;
805
806 for (i = 0; i < SYM_NUM; i++) {
807 cond_resched();
808 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
809 hashtab_destroy(p->symtab[i].table);
810 }
811
812 for (i = 0; i < SYM_NUM; i++) {
813 if (p->sym_val_to_name[i])
814 flex_array_free(p->sym_val_to_name[i]);
815 }
816
817 kfree(p->class_val_to_struct);
818 kfree(p->role_val_to_struct);
819 kfree(p->user_val_to_struct);
820 if (p->type_val_to_struct_array)
821 flex_array_free(p->type_val_to_struct_array);
822
823 avtab_destroy(&p->te_avtab);
824
825 for (i = 0; i < OCON_NUM; i++) {
826 cond_resched();
827 c = p->ocontexts[i];
828 while (c) {
829 ctmp = c;
830 c = c->next;
831 ocontext_destroy(ctmp, i);
832 }
833 p->ocontexts[i] = NULL;
834 }
835
836 g = p->genfs;
837 while (g) {
838 cond_resched();
839 kfree(g->fstype);
840 c = g->head;
841 while (c) {
842 ctmp = c;
843 c = c->next;
844 ocontext_destroy(ctmp, OCON_FSUSE);
845 }
846 gtmp = g;
847 g = g->next;
848 kfree(gtmp);
849 }
850 p->genfs = NULL;
851
852 cond_policydb_destroy(p);
853
854 for (tr = p->role_tr; tr; tr = tr->next) {
855 cond_resched();
856 kfree(ltr);
857 ltr = tr;
858 }
859 kfree(ltr);
860
861 for (ra = p->role_allow; ra; ra = ra->next) {
862 cond_resched();
863 kfree(lra);
864 lra = ra;
865 }
866 kfree(lra);
867
868 hashtab_map(p->filename_trans, filenametr_destroy, NULL);
869 hashtab_destroy(p->filename_trans);
870
871 hashtab_map(p->range_tr, range_tr_destroy, NULL);
872 hashtab_destroy(p->range_tr);
873
874 if (p->type_attr_map_array) {
875 for (i = 0; i < p->p_types.nprim; i++) {
876 struct ebitmap *e;
877
878 e = flex_array_get(p->type_attr_map_array, i);
879 if (!e)
880 continue;
881 ebitmap_destroy(e);
882 }
883 flex_array_free(p->type_attr_map_array);
884 }
885
886 ebitmap_destroy(&p->filename_trans_ttypes);
887 ebitmap_destroy(&p->policycaps);
888 ebitmap_destroy(&p->permissive_map);
889}
890
891
892
893
894
895int policydb_load_isids(struct policydb *p, struct sidtab *s)
896{
897 struct ocontext *head, *c;
898 int rc;
899
900 rc = sidtab_init(s);
901 if (rc) {
902 pr_err("SELinux: out of memory on SID table init\n");
903 goto out;
904 }
905
906 head = p->ocontexts[OCON_ISID];
907 for (c = head; c; c = c->next) {
908 rc = -EINVAL;
909 if (!c->context[0].user) {
910 pr_err("SELinux: SID %s was never defined.\n",
911 c->u.name);
912 goto out;
913 }
914
915 rc = sidtab_insert(s, c->sid[0], &c->context[0]);
916 if (rc) {
917 pr_err("SELinux: unable to load initial SID %s.\n",
918 c->u.name);
919 goto out;
920 }
921 }
922 rc = 0;
923out:
924 return rc;
925}
926
927int policydb_class_isvalid(struct policydb *p, unsigned int class)
928{
929 if (!class || class > p->p_classes.nprim)
930 return 0;
931 return 1;
932}
933
934int policydb_role_isvalid(struct policydb *p, unsigned int role)
935{
936 if (!role || role > p->p_roles.nprim)
937 return 0;
938 return 1;
939}
940
941int policydb_type_isvalid(struct policydb *p, unsigned int type)
942{
943 if (!type || type > p->p_types.nprim)
944 return 0;
945 return 1;
946}
947
948
949
950
951
952int policydb_context_isvalid(struct policydb *p, struct context *c)
953{
954 struct role_datum *role;
955 struct user_datum *usrdatum;
956
957 if (!c->role || c->role > p->p_roles.nprim)
958 return 0;
959
960 if (!c->user || c->user > p->p_users.nprim)
961 return 0;
962
963 if (!c->type || c->type > p->p_types.nprim)
964 return 0;
965
966 if (c->role != OBJECT_R_VAL) {
967
968
969
970 role = p->role_val_to_struct[c->role - 1];
971 if (!role || !ebitmap_get_bit(&role->types, c->type - 1))
972
973 return 0;
974
975
976
977
978 usrdatum = p->user_val_to_struct[c->user - 1];
979 if (!usrdatum)
980 return 0;
981
982 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
983
984 return 0;
985 }
986
987 if (!mls_context_isvalid(p, c))
988 return 0;
989
990 return 1;
991}
992
993
994
995
996
997static int mls_read_range_helper(struct mls_range *r, void *fp)
998{
999 __le32 buf[2];
1000 u32 items;
1001 int rc;
1002
1003 rc = next_entry(buf, fp, sizeof(u32));
1004 if (rc)
1005 goto out;
1006
1007 rc = -EINVAL;
1008 items = le32_to_cpu(buf[0]);
1009 if (items > ARRAY_SIZE(buf)) {
1010 pr_err("SELinux: mls: range overflow\n");
1011 goto out;
1012 }
1013
1014 rc = next_entry(buf, fp, sizeof(u32) * items);
1015 if (rc) {
1016 pr_err("SELinux: mls: truncated range\n");
1017 goto out;
1018 }
1019
1020 r->level[0].sens = le32_to_cpu(buf[0]);
1021 if (items > 1)
1022 r->level[1].sens = le32_to_cpu(buf[1]);
1023 else
1024 r->level[1].sens = r->level[0].sens;
1025
1026 rc = ebitmap_read(&r->level[0].cat, fp);
1027 if (rc) {
1028 pr_err("SELinux: mls: error reading low categories\n");
1029 goto out;
1030 }
1031 if (items > 1) {
1032 rc = ebitmap_read(&r->level[1].cat, fp);
1033 if (rc) {
1034 pr_err("SELinux: mls: error reading high categories\n");
1035 goto bad_high;
1036 }
1037 } else {
1038 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1039 if (rc) {
1040 pr_err("SELinux: mls: out of memory\n");
1041 goto bad_high;
1042 }
1043 }
1044
1045 return 0;
1046bad_high:
1047 ebitmap_destroy(&r->level[0].cat);
1048out:
1049 return rc;
1050}
1051
1052
1053
1054
1055
1056static int context_read_and_validate(struct context *c,
1057 struct policydb *p,
1058 void *fp)
1059{
1060 __le32 buf[3];
1061 int rc;
1062
1063 rc = next_entry(buf, fp, sizeof buf);
1064 if (rc) {
1065 pr_err("SELinux: context truncated\n");
1066 goto out;
1067 }
1068 c->user = le32_to_cpu(buf[0]);
1069 c->role = le32_to_cpu(buf[1]);
1070 c->type = le32_to_cpu(buf[2]);
1071 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1072 rc = mls_read_range_helper(&c->range, fp);
1073 if (rc) {
1074 pr_err("SELinux: error reading MLS range of context\n");
1075 goto out;
1076 }
1077 }
1078
1079 rc = -EINVAL;
1080 if (!policydb_context_isvalid(p, c)) {
1081 pr_err("SELinux: invalid security context\n");
1082 context_destroy(c);
1083 goto out;
1084 }
1085 rc = 0;
1086out:
1087 return rc;
1088}
1089
1090
1091
1092
1093
1094
1095
1096static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1097{
1098 int rc;
1099 char *str;
1100
1101 if ((len == 0) || (len == (u32)-1))
1102 return -EINVAL;
1103
1104 str = kmalloc(len + 1, flags);
1105 if (!str)
1106 return -ENOMEM;
1107
1108
1109 *strp = str;
1110
1111 rc = next_entry(str, fp, len);
1112 if (rc)
1113 return rc;
1114
1115 str[len] = '\0';
1116 return 0;
1117}
1118
1119static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
1120{
1121 char *key = NULL;
1122 struct perm_datum *perdatum;
1123 int rc;
1124 __le32 buf[2];
1125 u32 len;
1126
1127 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1128 if (!perdatum)
1129 return -ENOMEM;
1130
1131 rc = next_entry(buf, fp, sizeof buf);
1132 if (rc)
1133 goto bad;
1134
1135 len = le32_to_cpu(buf[0]);
1136 perdatum->value = le32_to_cpu(buf[1]);
1137
1138 rc = str_read(&key, GFP_KERNEL, fp, len);
1139 if (rc)
1140 goto bad;
1141
1142 rc = hashtab_insert(h, key, perdatum);
1143 if (rc)
1144 goto bad;
1145
1146 return 0;
1147bad:
1148 perm_destroy(key, perdatum, NULL);
1149 return rc;
1150}
1151
1152static int common_read(struct policydb *p, struct hashtab *h, void *fp)
1153{
1154 char *key = NULL;
1155 struct common_datum *comdatum;
1156 __le32 buf[4];
1157 u32 len, nel;
1158 int i, rc;
1159
1160 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1161 if (!comdatum)
1162 return -ENOMEM;
1163
1164 rc = next_entry(buf, fp, sizeof buf);
1165 if (rc)
1166 goto bad;
1167
1168 len = le32_to_cpu(buf[0]);
1169 comdatum->value = le32_to_cpu(buf[1]);
1170
1171 rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
1172 if (rc)
1173 goto bad;
1174 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1175 nel = le32_to_cpu(buf[3]);
1176
1177 rc = str_read(&key, GFP_KERNEL, fp, len);
1178 if (rc)
1179 goto bad;
1180
1181 for (i = 0; i < nel; i++) {
1182 rc = perm_read(p, comdatum->permissions.table, fp);
1183 if (rc)
1184 goto bad;
1185 }
1186
1187 rc = hashtab_insert(h, key, comdatum);
1188 if (rc)
1189 goto bad;
1190 return 0;
1191bad:
1192 common_destroy(key, comdatum, NULL);
1193 return rc;
1194}
1195
1196static void type_set_init(struct type_set *t)
1197{
1198 ebitmap_init(&t->types);
1199 ebitmap_init(&t->negset);
1200}
1201
1202static int type_set_read(struct type_set *t, void *fp)
1203{
1204 __le32 buf[1];
1205 int rc;
1206
1207 if (ebitmap_read(&t->types, fp))
1208 return -EINVAL;
1209 if (ebitmap_read(&t->negset, fp))
1210 return -EINVAL;
1211
1212 rc = next_entry(buf, fp, sizeof(u32));
1213 if (rc < 0)
1214 return -EINVAL;
1215 t->flags = le32_to_cpu(buf[0]);
1216
1217 return 0;
1218}
1219
1220
1221static int read_cons_helper(struct policydb *p,
1222 struct constraint_node **nodep,
1223 int ncons, int allowxtarget, void *fp)
1224{
1225 struct constraint_node *c, *lc;
1226 struct constraint_expr *e, *le;
1227 __le32 buf[3];
1228 u32 nexpr;
1229 int rc, i, j, depth;
1230
1231 lc = NULL;
1232 for (i = 0; i < ncons; i++) {
1233 c = kzalloc(sizeof(*c), GFP_KERNEL);
1234 if (!c)
1235 return -ENOMEM;
1236
1237 if (lc)
1238 lc->next = c;
1239 else
1240 *nodep = c;
1241
1242 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1243 if (rc)
1244 return rc;
1245 c->permissions = le32_to_cpu(buf[0]);
1246 nexpr = le32_to_cpu(buf[1]);
1247 le = NULL;
1248 depth = -1;
1249 for (j = 0; j < nexpr; j++) {
1250 e = kzalloc(sizeof(*e), GFP_KERNEL);
1251 if (!e)
1252 return -ENOMEM;
1253
1254 if (le)
1255 le->next = e;
1256 else
1257 c->expr = e;
1258
1259 rc = next_entry(buf, fp, (sizeof(u32) * 3));
1260 if (rc)
1261 return rc;
1262 e->expr_type = le32_to_cpu(buf[0]);
1263 e->attr = le32_to_cpu(buf[1]);
1264 e->op = le32_to_cpu(buf[2]);
1265
1266 switch (e->expr_type) {
1267 case CEXPR_NOT:
1268 if (depth < 0)
1269 return -EINVAL;
1270 break;
1271 case CEXPR_AND:
1272 case CEXPR_OR:
1273 if (depth < 1)
1274 return -EINVAL;
1275 depth--;
1276 break;
1277 case CEXPR_ATTR:
1278 if (depth == (CEXPR_MAXDEPTH - 1))
1279 return -EINVAL;
1280 depth++;
1281 break;
1282 case CEXPR_NAMES:
1283 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1284 return -EINVAL;
1285 if (depth == (CEXPR_MAXDEPTH - 1))
1286 return -EINVAL;
1287 depth++;
1288 rc = ebitmap_read(&e->names, fp);
1289 if (rc)
1290 return rc;
1291 if (p->policyvers >=
1292 POLICYDB_VERSION_CONSTRAINT_NAMES) {
1293 e->type_names = kzalloc(sizeof
1294 (*e->type_names),
1295 GFP_KERNEL);
1296 if (!e->type_names)
1297 return -ENOMEM;
1298 type_set_init(e->type_names);
1299 rc = type_set_read(e->type_names, fp);
1300 if (rc)
1301 return rc;
1302 }
1303 break;
1304 default:
1305 return -EINVAL;
1306 }
1307 le = e;
1308 }
1309 if (depth != 0)
1310 return -EINVAL;
1311 lc = c;
1312 }
1313
1314 return 0;
1315}
1316
1317static int class_read(struct policydb *p, struct hashtab *h, void *fp)
1318{
1319 char *key = NULL;
1320 struct class_datum *cladatum;
1321 __le32 buf[6];
1322 u32 len, len2, ncons, nel;
1323 int i, rc;
1324
1325 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1326 if (!cladatum)
1327 return -ENOMEM;
1328
1329 rc = next_entry(buf, fp, sizeof(u32)*6);
1330 if (rc)
1331 goto bad;
1332
1333 len = le32_to_cpu(buf[0]);
1334 len2 = le32_to_cpu(buf[1]);
1335 cladatum->value = le32_to_cpu(buf[2]);
1336
1337 rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
1338 if (rc)
1339 goto bad;
1340 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1341 nel = le32_to_cpu(buf[4]);
1342
1343 ncons = le32_to_cpu(buf[5]);
1344
1345 rc = str_read(&key, GFP_KERNEL, fp, len);
1346 if (rc)
1347 goto bad;
1348
1349 if (len2) {
1350 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1351 if (rc)
1352 goto bad;
1353
1354 rc = -EINVAL;
1355 cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey);
1356 if (!cladatum->comdatum) {
1357 pr_err("SELinux: unknown common %s\n",
1358 cladatum->comkey);
1359 goto bad;
1360 }
1361 }
1362 for (i = 0; i < nel; i++) {
1363 rc = perm_read(p, cladatum->permissions.table, fp);
1364 if (rc)
1365 goto bad;
1366 }
1367
1368 rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1369 if (rc)
1370 goto bad;
1371
1372 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1373
1374 rc = next_entry(buf, fp, sizeof(u32));
1375 if (rc)
1376 goto bad;
1377 ncons = le32_to_cpu(buf[0]);
1378 rc = read_cons_helper(p, &cladatum->validatetrans,
1379 ncons, 1, fp);
1380 if (rc)
1381 goto bad;
1382 }
1383
1384 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1385 rc = next_entry(buf, fp, sizeof(u32) * 3);
1386 if (rc)
1387 goto bad;
1388
1389 cladatum->default_user = le32_to_cpu(buf[0]);
1390 cladatum->default_role = le32_to_cpu(buf[1]);
1391 cladatum->default_range = le32_to_cpu(buf[2]);
1392 }
1393
1394 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1395 rc = next_entry(buf, fp, sizeof(u32) * 1);
1396 if (rc)
1397 goto bad;
1398 cladatum->default_type = le32_to_cpu(buf[0]);
1399 }
1400
1401 rc = hashtab_insert(h, key, cladatum);
1402 if (rc)
1403 goto bad;
1404
1405 return 0;
1406bad:
1407 cls_destroy(key, cladatum, NULL);
1408 return rc;
1409}
1410
1411static int role_read(struct policydb *p, struct hashtab *h, void *fp)
1412{
1413 char *key = NULL;
1414 struct role_datum *role;
1415 int rc, to_read = 2;
1416 __le32 buf[3];
1417 u32 len;
1418
1419 role = kzalloc(sizeof(*role), GFP_KERNEL);
1420 if (!role)
1421 return -ENOMEM;
1422
1423 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1424 to_read = 3;
1425
1426 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1427 if (rc)
1428 goto bad;
1429
1430 len = le32_to_cpu(buf[0]);
1431 role->value = le32_to_cpu(buf[1]);
1432 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1433 role->bounds = le32_to_cpu(buf[2]);
1434
1435 rc = str_read(&key, GFP_KERNEL, fp, len);
1436 if (rc)
1437 goto bad;
1438
1439 rc = ebitmap_read(&role->dominates, fp);
1440 if (rc)
1441 goto bad;
1442
1443 rc = ebitmap_read(&role->types, fp);
1444 if (rc)
1445 goto bad;
1446
1447 if (strcmp(key, OBJECT_R) == 0) {
1448 rc = -EINVAL;
1449 if (role->value != OBJECT_R_VAL) {
1450 pr_err("SELinux: Role %s has wrong value %d\n",
1451 OBJECT_R, role->value);
1452 goto bad;
1453 }
1454 rc = 0;
1455 goto bad;
1456 }
1457
1458 rc = hashtab_insert(h, key, role);
1459 if (rc)
1460 goto bad;
1461 return 0;
1462bad:
1463 role_destroy(key, role, NULL);
1464 return rc;
1465}
1466
1467static int type_read(struct policydb *p, struct hashtab *h, void *fp)
1468{
1469 char *key = NULL;
1470 struct type_datum *typdatum;
1471 int rc, to_read = 3;
1472 __le32 buf[4];
1473 u32 len;
1474
1475 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1476 if (!typdatum)
1477 return -ENOMEM;
1478
1479 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1480 to_read = 4;
1481
1482 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1483 if (rc)
1484 goto bad;
1485
1486 len = le32_to_cpu(buf[0]);
1487 typdatum->value = le32_to_cpu(buf[1]);
1488 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1489 u32 prop = le32_to_cpu(buf[2]);
1490
1491 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1492 typdatum->primary = 1;
1493 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1494 typdatum->attribute = 1;
1495
1496 typdatum->bounds = le32_to_cpu(buf[3]);
1497 } else {
1498 typdatum->primary = le32_to_cpu(buf[2]);
1499 }
1500
1501 rc = str_read(&key, GFP_KERNEL, fp, len);
1502 if (rc)
1503 goto bad;
1504
1505 rc = hashtab_insert(h, key, typdatum);
1506 if (rc)
1507 goto bad;
1508 return 0;
1509bad:
1510 type_destroy(key, typdatum, NULL);
1511 return rc;
1512}
1513
1514
1515
1516
1517
1518
1519static int mls_read_level(struct mls_level *lp, void *fp)
1520{
1521 __le32 buf[1];
1522 int rc;
1523
1524 memset(lp, 0, sizeof(*lp));
1525
1526 rc = next_entry(buf, fp, sizeof buf);
1527 if (rc) {
1528 pr_err("SELinux: mls: truncated level\n");
1529 return rc;
1530 }
1531 lp->sens = le32_to_cpu(buf[0]);
1532
1533 rc = ebitmap_read(&lp->cat, fp);
1534 if (rc) {
1535 pr_err("SELinux: mls: error reading level categories\n");
1536 return rc;
1537 }
1538 return 0;
1539}
1540
1541static int user_read(struct policydb *p, struct hashtab *h, void *fp)
1542{
1543 char *key = NULL;
1544 struct user_datum *usrdatum;
1545 int rc, to_read = 2;
1546 __le32 buf[3];
1547 u32 len;
1548
1549 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1550 if (!usrdatum)
1551 return -ENOMEM;
1552
1553 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1554 to_read = 3;
1555
1556 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1557 if (rc)
1558 goto bad;
1559
1560 len = le32_to_cpu(buf[0]);
1561 usrdatum->value = le32_to_cpu(buf[1]);
1562 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1563 usrdatum->bounds = le32_to_cpu(buf[2]);
1564
1565 rc = str_read(&key, GFP_KERNEL, fp, len);
1566 if (rc)
1567 goto bad;
1568
1569 rc = ebitmap_read(&usrdatum->roles, fp);
1570 if (rc)
1571 goto bad;
1572
1573 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1574 rc = mls_read_range_helper(&usrdatum->range, fp);
1575 if (rc)
1576 goto bad;
1577 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1578 if (rc)
1579 goto bad;
1580 }
1581
1582 rc = hashtab_insert(h, key, usrdatum);
1583 if (rc)
1584 goto bad;
1585 return 0;
1586bad:
1587 user_destroy(key, usrdatum, NULL);
1588 return rc;
1589}
1590
1591static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
1592{
1593 char *key = NULL;
1594 struct level_datum *levdatum;
1595 int rc;
1596 __le32 buf[2];
1597 u32 len;
1598
1599 levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1600 if (!levdatum)
1601 return -ENOMEM;
1602
1603 rc = next_entry(buf, fp, sizeof buf);
1604 if (rc)
1605 goto bad;
1606
1607 len = le32_to_cpu(buf[0]);
1608 levdatum->isalias = le32_to_cpu(buf[1]);
1609
1610 rc = str_read(&key, GFP_ATOMIC, fp, len);
1611 if (rc)
1612 goto bad;
1613
1614 rc = -ENOMEM;
1615 levdatum->level = kmalloc(sizeof(*levdatum->level), GFP_ATOMIC);
1616 if (!levdatum->level)
1617 goto bad;
1618
1619 rc = mls_read_level(levdatum->level, fp);
1620 if (rc)
1621 goto bad;
1622
1623 rc = hashtab_insert(h, key, levdatum);
1624 if (rc)
1625 goto bad;
1626 return 0;
1627bad:
1628 sens_destroy(key, levdatum, NULL);
1629 return rc;
1630}
1631
1632static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
1633{
1634 char *key = NULL;
1635 struct cat_datum *catdatum;
1636 int rc;
1637 __le32 buf[3];
1638 u32 len;
1639
1640 catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1641 if (!catdatum)
1642 return -ENOMEM;
1643
1644 rc = next_entry(buf, fp, sizeof buf);
1645 if (rc)
1646 goto bad;
1647
1648 len = le32_to_cpu(buf[0]);
1649 catdatum->value = le32_to_cpu(buf[1]);
1650 catdatum->isalias = le32_to_cpu(buf[2]);
1651
1652 rc = str_read(&key, GFP_ATOMIC, fp, len);
1653 if (rc)
1654 goto bad;
1655
1656 rc = hashtab_insert(h, key, catdatum);
1657 if (rc)
1658 goto bad;
1659 return 0;
1660bad:
1661 cat_destroy(key, catdatum, NULL);
1662 return rc;
1663}
1664
1665static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
1666{
1667 common_read,
1668 class_read,
1669 role_read,
1670 type_read,
1671 user_read,
1672 cond_read_bool,
1673 sens_read,
1674 cat_read,
1675};
1676
1677static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1678{
1679 struct user_datum *upper, *user;
1680 struct policydb *p = datap;
1681 int depth = 0;
1682
1683 upper = user = datum;
1684 while (upper->bounds) {
1685 struct ebitmap_node *node;
1686 unsigned long bit;
1687
1688 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1689 pr_err("SELinux: user %s: "
1690 "too deep or looped boundary",
1691 (char *) key);
1692 return -EINVAL;
1693 }
1694
1695 upper = p->user_val_to_struct[upper->bounds - 1];
1696 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1697 if (ebitmap_get_bit(&upper->roles, bit))
1698 continue;
1699
1700 pr_err("SELinux: boundary violated policy: "
1701 "user=%s role=%s bounds=%s\n",
1702 sym_name(p, SYM_USERS, user->value - 1),
1703 sym_name(p, SYM_ROLES, bit),
1704 sym_name(p, SYM_USERS, upper->value - 1));
1705
1706 return -EINVAL;
1707 }
1708 }
1709
1710 return 0;
1711}
1712
1713static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1714{
1715 struct role_datum *upper, *role;
1716 struct policydb *p = datap;
1717 int depth = 0;
1718
1719 upper = role = datum;
1720 while (upper->bounds) {
1721 struct ebitmap_node *node;
1722 unsigned long bit;
1723
1724 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1725 pr_err("SELinux: role %s: "
1726 "too deep or looped bounds\n",
1727 (char *) key);
1728 return -EINVAL;
1729 }
1730
1731 upper = p->role_val_to_struct[upper->bounds - 1];
1732 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1733 if (ebitmap_get_bit(&upper->types, bit))
1734 continue;
1735
1736 pr_err("SELinux: boundary violated policy: "
1737 "role=%s type=%s bounds=%s\n",
1738 sym_name(p, SYM_ROLES, role->value - 1),
1739 sym_name(p, SYM_TYPES, bit),
1740 sym_name(p, SYM_ROLES, upper->value - 1));
1741
1742 return -EINVAL;
1743 }
1744 }
1745
1746 return 0;
1747}
1748
1749static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1750{
1751 struct type_datum *upper;
1752 struct policydb *p = datap;
1753 int depth = 0;
1754
1755 upper = datum;
1756 while (upper->bounds) {
1757 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1758 pr_err("SELinux: type %s: "
1759 "too deep or looped boundary\n",
1760 (char *) key);
1761 return -EINVAL;
1762 }
1763
1764 upper = flex_array_get_ptr(p->type_val_to_struct_array,
1765 upper->bounds - 1);
1766 BUG_ON(!upper);
1767
1768 if (upper->attribute) {
1769 pr_err("SELinux: type %s: "
1770 "bounded by attribute %s",
1771 (char *) key,
1772 sym_name(p, SYM_TYPES, upper->value - 1));
1773 return -EINVAL;
1774 }
1775 }
1776
1777 return 0;
1778}
1779
1780static int policydb_bounds_sanity_check(struct policydb *p)
1781{
1782 int rc;
1783
1784 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1785 return 0;
1786
1787 rc = hashtab_map(p->p_users.table,
1788 user_bounds_sanity_check, p);
1789 if (rc)
1790 return rc;
1791
1792 rc = hashtab_map(p->p_roles.table,
1793 role_bounds_sanity_check, p);
1794 if (rc)
1795 return rc;
1796
1797 rc = hashtab_map(p->p_types.table,
1798 type_bounds_sanity_check, p);
1799 if (rc)
1800 return rc;
1801
1802 return 0;
1803}
1804
1805u16 string_to_security_class(struct policydb *p, const char *name)
1806{
1807 struct class_datum *cladatum;
1808
1809 cladatum = hashtab_search(p->p_classes.table, name);
1810 if (!cladatum)
1811 return 0;
1812
1813 return cladatum->value;
1814}
1815
1816u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1817{
1818 struct class_datum *cladatum;
1819 struct perm_datum *perdatum = NULL;
1820 struct common_datum *comdatum;
1821
1822 if (!tclass || tclass > p->p_classes.nprim)
1823 return 0;
1824
1825 cladatum = p->class_val_to_struct[tclass-1];
1826 comdatum = cladatum->comdatum;
1827 if (comdatum)
1828 perdatum = hashtab_search(comdatum->permissions.table,
1829 name);
1830 if (!perdatum)
1831 perdatum = hashtab_search(cladatum->permissions.table,
1832 name);
1833 if (!perdatum)
1834 return 0;
1835
1836 return 1U << (perdatum->value-1);
1837}
1838
1839static int range_read(struct policydb *p, void *fp)
1840{
1841 struct range_trans *rt = NULL;
1842 struct mls_range *r = NULL;
1843 int i, rc;
1844 __le32 buf[2];
1845 u32 nel;
1846
1847 if (p->policyvers < POLICYDB_VERSION_MLS)
1848 return 0;
1849
1850 rc = next_entry(buf, fp, sizeof(u32));
1851 if (rc)
1852 return rc;
1853
1854 nel = le32_to_cpu(buf[0]);
1855 for (i = 0; i < nel; i++) {
1856 rc = -ENOMEM;
1857 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1858 if (!rt)
1859 goto out;
1860
1861 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1862 if (rc)
1863 goto out;
1864
1865 rt->source_type = le32_to_cpu(buf[0]);
1866 rt->target_type = le32_to_cpu(buf[1]);
1867 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1868 rc = next_entry(buf, fp, sizeof(u32));
1869 if (rc)
1870 goto out;
1871 rt->target_class = le32_to_cpu(buf[0]);
1872 } else
1873 rt->target_class = p->process_class;
1874
1875 rc = -EINVAL;
1876 if (!policydb_type_isvalid(p, rt->source_type) ||
1877 !policydb_type_isvalid(p, rt->target_type) ||
1878 !policydb_class_isvalid(p, rt->target_class))
1879 goto out;
1880
1881 rc = -ENOMEM;
1882 r = kzalloc(sizeof(*r), GFP_KERNEL);
1883 if (!r)
1884 goto out;
1885
1886 rc = mls_read_range_helper(r, fp);
1887 if (rc)
1888 goto out;
1889
1890 rc = -EINVAL;
1891 if (!mls_range_isvalid(p, r)) {
1892 pr_warn("SELinux: rangetrans: invalid range\n");
1893 goto out;
1894 }
1895
1896 rc = hashtab_insert(p->range_tr, rt, r);
1897 if (rc)
1898 goto out;
1899
1900 rt = NULL;
1901 r = NULL;
1902 }
1903 hash_eval(p->range_tr, "rangetr");
1904 rc = 0;
1905out:
1906 kfree(rt);
1907 kfree(r);
1908 return rc;
1909}
1910
1911static int filename_trans_read(struct policydb *p, void *fp)
1912{
1913 struct filename_trans *ft;
1914 struct filename_trans_datum *otype;
1915 char *name;
1916 u32 nel, len;
1917 __le32 buf[4];
1918 int rc, i;
1919
1920 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
1921 return 0;
1922
1923 rc = next_entry(buf, fp, sizeof(u32));
1924 if (rc)
1925 return rc;
1926 nel = le32_to_cpu(buf[0]);
1927
1928 for (i = 0; i < nel; i++) {
1929 otype = NULL;
1930 name = NULL;
1931
1932 rc = -ENOMEM;
1933 ft = kzalloc(sizeof(*ft), GFP_KERNEL);
1934 if (!ft)
1935 goto out;
1936
1937 rc = -ENOMEM;
1938 otype = kmalloc(sizeof(*otype), GFP_KERNEL);
1939 if (!otype)
1940 goto out;
1941
1942
1943 rc = next_entry(buf, fp, sizeof(u32));
1944 if (rc)
1945 goto out;
1946 len = le32_to_cpu(buf[0]);
1947
1948
1949 rc = str_read(&name, GFP_KERNEL, fp, len);
1950 if (rc)
1951 goto out;
1952
1953 ft->name = name;
1954
1955 rc = next_entry(buf, fp, sizeof(u32) * 4);
1956 if (rc)
1957 goto out;
1958
1959 ft->stype = le32_to_cpu(buf[0]);
1960 ft->ttype = le32_to_cpu(buf[1]);
1961 ft->tclass = le32_to_cpu(buf[2]);
1962
1963 otype->otype = le32_to_cpu(buf[3]);
1964
1965 rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1);
1966 if (rc)
1967 goto out;
1968
1969 rc = hashtab_insert(p->filename_trans, ft, otype);
1970 if (rc) {
1971
1972
1973
1974
1975 if (rc != -EEXIST)
1976 goto out;
1977
1978 kfree(ft);
1979 kfree(name);
1980 kfree(otype);
1981 }
1982 }
1983 hash_eval(p->filename_trans, "filenametr");
1984 return 0;
1985out:
1986 kfree(ft);
1987 kfree(name);
1988 kfree(otype);
1989
1990 return rc;
1991}
1992
1993static int genfs_read(struct policydb *p, void *fp)
1994{
1995 int i, j, rc;
1996 u32 nel, nel2, len, len2;
1997 __le32 buf[1];
1998 struct ocontext *l, *c;
1999 struct ocontext *newc = NULL;
2000 struct genfs *genfs_p, *genfs;
2001 struct genfs *newgenfs = NULL;
2002
2003 rc = next_entry(buf, fp, sizeof(u32));
2004 if (rc)
2005 return rc;
2006 nel = le32_to_cpu(buf[0]);
2007
2008 for (i = 0; i < nel; i++) {
2009 rc = next_entry(buf, fp, sizeof(u32));
2010 if (rc)
2011 goto out;
2012 len = le32_to_cpu(buf[0]);
2013
2014 rc = -ENOMEM;
2015 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
2016 if (!newgenfs)
2017 goto out;
2018
2019 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
2020 if (rc)
2021 goto out;
2022
2023 for (genfs_p = NULL, genfs = p->genfs; genfs;
2024 genfs_p = genfs, genfs = genfs->next) {
2025 rc = -EINVAL;
2026 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
2027 pr_err("SELinux: dup genfs fstype %s\n",
2028 newgenfs->fstype);
2029 goto out;
2030 }
2031 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
2032 break;
2033 }
2034 newgenfs->next = genfs;
2035 if (genfs_p)
2036 genfs_p->next = newgenfs;
2037 else
2038 p->genfs = newgenfs;
2039 genfs = newgenfs;
2040 newgenfs = NULL;
2041
2042 rc = next_entry(buf, fp, sizeof(u32));
2043 if (rc)
2044 goto out;
2045
2046 nel2 = le32_to_cpu(buf[0]);
2047 for (j = 0; j < nel2; j++) {
2048 rc = next_entry(buf, fp, sizeof(u32));
2049 if (rc)
2050 goto out;
2051 len = le32_to_cpu(buf[0]);
2052
2053 rc = -ENOMEM;
2054 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2055 if (!newc)
2056 goto out;
2057
2058 rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2059 if (rc)
2060 goto out;
2061
2062 rc = next_entry(buf, fp, sizeof(u32));
2063 if (rc)
2064 goto out;
2065
2066 newc->v.sclass = le32_to_cpu(buf[0]);
2067 rc = context_read_and_validate(&newc->context[0], p, fp);
2068 if (rc)
2069 goto out;
2070
2071 for (l = NULL, c = genfs->head; c;
2072 l = c, c = c->next) {
2073 rc = -EINVAL;
2074 if (!strcmp(newc->u.name, c->u.name) &&
2075 (!c->v.sclass || !newc->v.sclass ||
2076 newc->v.sclass == c->v.sclass)) {
2077 pr_err("SELinux: dup genfs entry (%s,%s)\n",
2078 genfs->fstype, c->u.name);
2079 goto out;
2080 }
2081 len = strlen(newc->u.name);
2082 len2 = strlen(c->u.name);
2083 if (len > len2)
2084 break;
2085 }
2086
2087 newc->next = c;
2088 if (l)
2089 l->next = newc;
2090 else
2091 genfs->head = newc;
2092 newc = NULL;
2093 }
2094 }
2095 rc = 0;
2096out:
2097 if (newgenfs) {
2098 kfree(newgenfs->fstype);
2099 kfree(newgenfs);
2100 }
2101 ocontext_destroy(newc, OCON_FSUSE);
2102
2103 return rc;
2104}
2105
2106static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2107 void *fp)
2108{
2109 int i, j, rc;
2110 u32 nel, len;
2111 __le32 buf[3];
2112 struct ocontext *l, *c;
2113 u32 nodebuf[8];
2114
2115 for (i = 0; i < info->ocon_num; i++) {
2116 rc = next_entry(buf, fp, sizeof(u32));
2117 if (rc)
2118 goto out;
2119 nel = le32_to_cpu(buf[0]);
2120
2121 l = NULL;
2122 for (j = 0; j < nel; j++) {
2123 rc = -ENOMEM;
2124 c = kzalloc(sizeof(*c), GFP_KERNEL);
2125 if (!c)
2126 goto out;
2127 if (l)
2128 l->next = c;
2129 else
2130 p->ocontexts[i] = c;
2131 l = c;
2132
2133 switch (i) {
2134 case OCON_ISID:
2135 rc = next_entry(buf, fp, sizeof(u32));
2136 if (rc)
2137 goto out;
2138
2139 c->sid[0] = le32_to_cpu(buf[0]);
2140 rc = context_read_and_validate(&c->context[0], p, fp);
2141 if (rc)
2142 goto out;
2143 break;
2144 case OCON_FS:
2145 case OCON_NETIF:
2146 rc = next_entry(buf, fp, sizeof(u32));
2147 if (rc)
2148 goto out;
2149 len = le32_to_cpu(buf[0]);
2150
2151 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2152 if (rc)
2153 goto out;
2154
2155 rc = context_read_and_validate(&c->context[0], p, fp);
2156 if (rc)
2157 goto out;
2158 rc = context_read_and_validate(&c->context[1], p, fp);
2159 if (rc)
2160 goto out;
2161 break;
2162 case OCON_PORT:
2163 rc = next_entry(buf, fp, sizeof(u32)*3);
2164 if (rc)
2165 goto out;
2166 c->u.port.protocol = le32_to_cpu(buf[0]);
2167 c->u.port.low_port = le32_to_cpu(buf[1]);
2168 c->u.port.high_port = le32_to_cpu(buf[2]);
2169 rc = context_read_and_validate(&c->context[0], p, fp);
2170 if (rc)
2171 goto out;
2172 break;
2173 case OCON_NODE:
2174 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2175 if (rc)
2176 goto out;
2177 c->u.node.addr = nodebuf[0];
2178 c->u.node.mask = nodebuf[1];
2179 rc = context_read_and_validate(&c->context[0], p, fp);
2180 if (rc)
2181 goto out;
2182 break;
2183 case OCON_FSUSE:
2184 rc = next_entry(buf, fp, sizeof(u32)*2);
2185 if (rc)
2186 goto out;
2187
2188 rc = -EINVAL;
2189 c->v.behavior = le32_to_cpu(buf[0]);
2190
2191 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2192 goto out;
2193 if (c->v.behavior > SECURITY_FS_USE_MAX)
2194 goto out;
2195
2196 len = le32_to_cpu(buf[1]);
2197 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2198 if (rc)
2199 goto out;
2200
2201 rc = context_read_and_validate(&c->context[0], p, fp);
2202 if (rc)
2203 goto out;
2204 break;
2205 case OCON_NODE6: {
2206 int k;
2207
2208 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2209 if (rc)
2210 goto out;
2211 for (k = 0; k < 4; k++)
2212 c->u.node6.addr[k] = nodebuf[k];
2213 for (k = 0; k < 4; k++)
2214 c->u.node6.mask[k] = nodebuf[k+4];
2215 rc = context_read_and_validate(&c->context[0], p, fp);
2216 if (rc)
2217 goto out;
2218 break;
2219 }
2220 case OCON_IBPKEY:
2221 rc = next_entry(nodebuf, fp, sizeof(u32) * 4);
2222 if (rc)
2223 goto out;
2224
2225 c->u.ibpkey.subnet_prefix = be64_to_cpu(*((__be64 *)nodebuf));
2226
2227 if (nodebuf[2] > 0xffff ||
2228 nodebuf[3] > 0xffff) {
2229 rc = -EINVAL;
2230 goto out;
2231 }
2232
2233 c->u.ibpkey.low_pkey = le32_to_cpu(nodebuf[2]);
2234 c->u.ibpkey.high_pkey = le32_to_cpu(nodebuf[3]);
2235
2236 rc = context_read_and_validate(&c->context[0],
2237 p,
2238 fp);
2239 if (rc)
2240 goto out;
2241 break;
2242 case OCON_IBENDPORT:
2243 rc = next_entry(buf, fp, sizeof(u32) * 2);
2244 if (rc)
2245 goto out;
2246 len = le32_to_cpu(buf[0]);
2247
2248 rc = str_read(&c->u.ibendport.dev_name, GFP_KERNEL, fp, len);
2249 if (rc)
2250 goto out;
2251
2252 if (buf[1] > 0xff || buf[1] == 0) {
2253 rc = -EINVAL;
2254 goto out;
2255 }
2256
2257 c->u.ibendport.port = le32_to_cpu(buf[1]);
2258
2259 rc = context_read_and_validate(&c->context[0],
2260 p,
2261 fp);
2262 if (rc)
2263 goto out;
2264 break;
2265 }
2266 }
2267 }
2268 rc = 0;
2269out:
2270 return rc;
2271}
2272
2273
2274
2275
2276
2277int policydb_read(struct policydb *p, void *fp)
2278{
2279 struct role_allow *ra, *lra;
2280 struct role_trans *tr, *ltr;
2281 int i, j, rc;
2282 __le32 buf[4];
2283 u32 len, nprim, nel;
2284
2285 char *policydb_str;
2286 struct policydb_compat_info *info;
2287
2288 rc = policydb_init(p);
2289 if (rc)
2290 return rc;
2291
2292
2293 rc = next_entry(buf, fp, sizeof(u32) * 2);
2294 if (rc)
2295 goto bad;
2296
2297 rc = -EINVAL;
2298 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2299 pr_err("SELinux: policydb magic number 0x%x does "
2300 "not match expected magic number 0x%x\n",
2301 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2302 goto bad;
2303 }
2304
2305 rc = -EINVAL;
2306 len = le32_to_cpu(buf[1]);
2307 if (len != strlen(POLICYDB_STRING)) {
2308 pr_err("SELinux: policydb string length %d does not "
2309 "match expected length %zu\n",
2310 len, strlen(POLICYDB_STRING));
2311 goto bad;
2312 }
2313
2314 rc = -ENOMEM;
2315 policydb_str = kmalloc(len + 1, GFP_KERNEL);
2316 if (!policydb_str) {
2317 pr_err("SELinux: unable to allocate memory for policydb "
2318 "string of length %d\n", len);
2319 goto bad;
2320 }
2321
2322 rc = next_entry(policydb_str, fp, len);
2323 if (rc) {
2324 pr_err("SELinux: truncated policydb string identifier\n");
2325 kfree(policydb_str);
2326 goto bad;
2327 }
2328
2329 rc = -EINVAL;
2330 policydb_str[len] = '\0';
2331 if (strcmp(policydb_str, POLICYDB_STRING)) {
2332 pr_err("SELinux: policydb string %s does not match "
2333 "my string %s\n", policydb_str, POLICYDB_STRING);
2334 kfree(policydb_str);
2335 goto bad;
2336 }
2337
2338 kfree(policydb_str);
2339 policydb_str = NULL;
2340
2341
2342 rc = next_entry(buf, fp, sizeof(u32)*4);
2343 if (rc)
2344 goto bad;
2345
2346 rc = -EINVAL;
2347 p->policyvers = le32_to_cpu(buf[0]);
2348 if (p->policyvers < POLICYDB_VERSION_MIN ||
2349 p->policyvers > POLICYDB_VERSION_MAX) {
2350 pr_err("SELinux: policydb version %d does not match "
2351 "my version range %d-%d\n",
2352 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2353 goto bad;
2354 }
2355
2356 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2357 p->mls_enabled = 1;
2358
2359 rc = -EINVAL;
2360 if (p->policyvers < POLICYDB_VERSION_MLS) {
2361 pr_err("SELinux: security policydb version %d "
2362 "(MLS) not backwards compatible\n",
2363 p->policyvers);
2364 goto bad;
2365 }
2366 }
2367 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2368 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2369
2370 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2371 rc = ebitmap_read(&p->policycaps, fp);
2372 if (rc)
2373 goto bad;
2374 }
2375
2376 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2377 rc = ebitmap_read(&p->permissive_map, fp);
2378 if (rc)
2379 goto bad;
2380 }
2381
2382 rc = -EINVAL;
2383 info = policydb_lookup_compat(p->policyvers);
2384 if (!info) {
2385 pr_err("SELinux: unable to find policy compat info "
2386 "for version %d\n", p->policyvers);
2387 goto bad;
2388 }
2389
2390 rc = -EINVAL;
2391 if (le32_to_cpu(buf[2]) != info->sym_num ||
2392 le32_to_cpu(buf[3]) != info->ocon_num) {
2393 pr_err("SELinux: policydb table sizes (%d,%d) do "
2394 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2395 le32_to_cpu(buf[3]),
2396 info->sym_num, info->ocon_num);
2397 goto bad;
2398 }
2399
2400 for (i = 0; i < info->sym_num; i++) {
2401 rc = next_entry(buf, fp, sizeof(u32)*2);
2402 if (rc)
2403 goto bad;
2404 nprim = le32_to_cpu(buf[0]);
2405 nel = le32_to_cpu(buf[1]);
2406 for (j = 0; j < nel; j++) {
2407 rc = read_f[i](p, p->symtab[i].table, fp);
2408 if (rc)
2409 goto bad;
2410 }
2411
2412 p->symtab[i].nprim = nprim;
2413 }
2414
2415 rc = -EINVAL;
2416 p->process_class = string_to_security_class(p, "process");
2417 if (!p->process_class)
2418 goto bad;
2419
2420 rc = avtab_read(&p->te_avtab, fp, p);
2421 if (rc)
2422 goto bad;
2423
2424 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2425 rc = cond_read_list(p, fp);
2426 if (rc)
2427 goto bad;
2428 }
2429
2430 rc = next_entry(buf, fp, sizeof(u32));
2431 if (rc)
2432 goto bad;
2433 nel = le32_to_cpu(buf[0]);
2434 ltr = NULL;
2435 for (i = 0; i < nel; i++) {
2436 rc = -ENOMEM;
2437 tr = kzalloc(sizeof(*tr), GFP_KERNEL);
2438 if (!tr)
2439 goto bad;
2440 if (ltr)
2441 ltr->next = tr;
2442 else
2443 p->role_tr = tr;
2444 rc = next_entry(buf, fp, sizeof(u32)*3);
2445 if (rc)
2446 goto bad;
2447
2448 rc = -EINVAL;
2449 tr->role = le32_to_cpu(buf[0]);
2450 tr->type = le32_to_cpu(buf[1]);
2451 tr->new_role = le32_to_cpu(buf[2]);
2452 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2453 rc = next_entry(buf, fp, sizeof(u32));
2454 if (rc)
2455 goto bad;
2456 tr->tclass = le32_to_cpu(buf[0]);
2457 } else
2458 tr->tclass = p->process_class;
2459
2460 rc = -EINVAL;
2461 if (!policydb_role_isvalid(p, tr->role) ||
2462 !policydb_type_isvalid(p, tr->type) ||
2463 !policydb_class_isvalid(p, tr->tclass) ||
2464 !policydb_role_isvalid(p, tr->new_role))
2465 goto bad;
2466 ltr = tr;
2467 }
2468
2469 rc = next_entry(buf, fp, sizeof(u32));
2470 if (rc)
2471 goto bad;
2472 nel = le32_to_cpu(buf[0]);
2473 lra = NULL;
2474 for (i = 0; i < nel; i++) {
2475 rc = -ENOMEM;
2476 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2477 if (!ra)
2478 goto bad;
2479 if (lra)
2480 lra->next = ra;
2481 else
2482 p->role_allow = ra;
2483 rc = next_entry(buf, fp, sizeof(u32)*2);
2484 if (rc)
2485 goto bad;
2486
2487 rc = -EINVAL;
2488 ra->role = le32_to_cpu(buf[0]);
2489 ra->new_role = le32_to_cpu(buf[1]);
2490 if (!policydb_role_isvalid(p, ra->role) ||
2491 !policydb_role_isvalid(p, ra->new_role))
2492 goto bad;
2493 lra = ra;
2494 }
2495
2496 rc = filename_trans_read(p, fp);
2497 if (rc)
2498 goto bad;
2499
2500 rc = policydb_index(p);
2501 if (rc)
2502 goto bad;
2503
2504 rc = -EINVAL;
2505 p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
2506 p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
2507 if (!p->process_trans_perms)
2508 goto bad;
2509
2510 rc = ocontext_read(p, info, fp);
2511 if (rc)
2512 goto bad;
2513
2514 rc = genfs_read(p, fp);
2515 if (rc)
2516 goto bad;
2517
2518 rc = range_read(p, fp);
2519 if (rc)
2520 goto bad;
2521
2522 rc = -ENOMEM;
2523 p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap),
2524 p->p_types.nprim,
2525 GFP_KERNEL | __GFP_ZERO);
2526 if (!p->type_attr_map_array)
2527 goto bad;
2528
2529
2530 rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim,
2531 GFP_KERNEL | __GFP_ZERO);
2532 if (rc)
2533 goto bad;
2534
2535 for (i = 0; i < p->p_types.nprim; i++) {
2536 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
2537
2538 BUG_ON(!e);
2539 ebitmap_init(e);
2540 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2541 rc = ebitmap_read(e, fp);
2542 if (rc)
2543 goto bad;
2544 }
2545
2546 rc = ebitmap_set_bit(e, i, 1);
2547 if (rc)
2548 goto bad;
2549 }
2550
2551 rc = policydb_bounds_sanity_check(p);
2552 if (rc)
2553 goto bad;
2554
2555 rc = 0;
2556out:
2557 return rc;
2558bad:
2559 policydb_destroy(p);
2560 goto out;
2561}
2562
2563
2564
2565
2566
2567static int mls_write_level(struct mls_level *l, void *fp)
2568{
2569 __le32 buf[1];
2570 int rc;
2571
2572 buf[0] = cpu_to_le32(l->sens);
2573 rc = put_entry(buf, sizeof(u32), 1, fp);
2574 if (rc)
2575 return rc;
2576
2577 rc = ebitmap_write(&l->cat, fp);
2578 if (rc)
2579 return rc;
2580
2581 return 0;
2582}
2583
2584
2585
2586
2587
2588static int mls_write_range_helper(struct mls_range *r, void *fp)
2589{
2590 __le32 buf[3];
2591 size_t items;
2592 int rc, eq;
2593
2594 eq = mls_level_eq(&r->level[1], &r->level[0]);
2595
2596 if (eq)
2597 items = 2;
2598 else
2599 items = 3;
2600 buf[0] = cpu_to_le32(items-1);
2601 buf[1] = cpu_to_le32(r->level[0].sens);
2602 if (!eq)
2603 buf[2] = cpu_to_le32(r->level[1].sens);
2604
2605 BUG_ON(items > ARRAY_SIZE(buf));
2606
2607 rc = put_entry(buf, sizeof(u32), items, fp);
2608 if (rc)
2609 return rc;
2610
2611 rc = ebitmap_write(&r->level[0].cat, fp);
2612 if (rc)
2613 return rc;
2614 if (!eq) {
2615 rc = ebitmap_write(&r->level[1].cat, fp);
2616 if (rc)
2617 return rc;
2618 }
2619
2620 return 0;
2621}
2622
2623static int sens_write(void *vkey, void *datum, void *ptr)
2624{
2625 char *key = vkey;
2626 struct level_datum *levdatum = datum;
2627 struct policy_data *pd = ptr;
2628 void *fp = pd->fp;
2629 __le32 buf[2];
2630 size_t len;
2631 int rc;
2632
2633 len = strlen(key);
2634 buf[0] = cpu_to_le32(len);
2635 buf[1] = cpu_to_le32(levdatum->isalias);
2636 rc = put_entry(buf, sizeof(u32), 2, fp);
2637 if (rc)
2638 return rc;
2639
2640 rc = put_entry(key, 1, len, fp);
2641 if (rc)
2642 return rc;
2643
2644 rc = mls_write_level(levdatum->level, fp);
2645 if (rc)
2646 return rc;
2647
2648 return 0;
2649}
2650
2651static int cat_write(void *vkey, void *datum, void *ptr)
2652{
2653 char *key = vkey;
2654 struct cat_datum *catdatum = datum;
2655 struct policy_data *pd = ptr;
2656 void *fp = pd->fp;
2657 __le32 buf[3];
2658 size_t len;
2659 int rc;
2660
2661 len = strlen(key);
2662 buf[0] = cpu_to_le32(len);
2663 buf[1] = cpu_to_le32(catdatum->value);
2664 buf[2] = cpu_to_le32(catdatum->isalias);
2665 rc = put_entry(buf, sizeof(u32), 3, fp);
2666 if (rc)
2667 return rc;
2668
2669 rc = put_entry(key, 1, len, fp);
2670 if (rc)
2671 return rc;
2672
2673 return 0;
2674}
2675
2676static int role_trans_write(struct policydb *p, void *fp)
2677{
2678 struct role_trans *r = p->role_tr;
2679 struct role_trans *tr;
2680 u32 buf[3];
2681 size_t nel;
2682 int rc;
2683
2684 nel = 0;
2685 for (tr = r; tr; tr = tr->next)
2686 nel++;
2687 buf[0] = cpu_to_le32(nel);
2688 rc = put_entry(buf, sizeof(u32), 1, fp);
2689 if (rc)
2690 return rc;
2691 for (tr = r; tr; tr = tr->next) {
2692 buf[0] = cpu_to_le32(tr->role);
2693 buf[1] = cpu_to_le32(tr->type);
2694 buf[2] = cpu_to_le32(tr->new_role);
2695 rc = put_entry(buf, sizeof(u32), 3, fp);
2696 if (rc)
2697 return rc;
2698 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2699 buf[0] = cpu_to_le32(tr->tclass);
2700 rc = put_entry(buf, sizeof(u32), 1, fp);
2701 if (rc)
2702 return rc;
2703 }
2704 }
2705
2706 return 0;
2707}
2708
2709static int role_allow_write(struct role_allow *r, void *fp)
2710{
2711 struct role_allow *ra;
2712 u32 buf[2];
2713 size_t nel;
2714 int rc;
2715
2716 nel = 0;
2717 for (ra = r; ra; ra = ra->next)
2718 nel++;
2719 buf[0] = cpu_to_le32(nel);
2720 rc = put_entry(buf, sizeof(u32), 1, fp);
2721 if (rc)
2722 return rc;
2723 for (ra = r; ra; ra = ra->next) {
2724 buf[0] = cpu_to_le32(ra->role);
2725 buf[1] = cpu_to_le32(ra->new_role);
2726 rc = put_entry(buf, sizeof(u32), 2, fp);
2727 if (rc)
2728 return rc;
2729 }
2730 return 0;
2731}
2732
2733
2734
2735
2736
2737static int context_write(struct policydb *p, struct context *c,
2738 void *fp)
2739{
2740 int rc;
2741 __le32 buf[3];
2742
2743 buf[0] = cpu_to_le32(c->user);
2744 buf[1] = cpu_to_le32(c->role);
2745 buf[2] = cpu_to_le32(c->type);
2746
2747 rc = put_entry(buf, sizeof(u32), 3, fp);
2748 if (rc)
2749 return rc;
2750
2751 rc = mls_write_range_helper(&c->range, fp);
2752 if (rc)
2753 return rc;
2754
2755 return 0;
2756}
2757
2758
2759
2760
2761
2762
2763
2764static int perm_write(void *vkey, void *datum, void *fp)
2765{
2766 char *key = vkey;
2767 struct perm_datum *perdatum = datum;
2768 __le32 buf[2];
2769 size_t len;
2770 int rc;
2771
2772 len = strlen(key);
2773 buf[0] = cpu_to_le32(len);
2774 buf[1] = cpu_to_le32(perdatum->value);
2775 rc = put_entry(buf, sizeof(u32), 2, fp);
2776 if (rc)
2777 return rc;
2778
2779 rc = put_entry(key, 1, len, fp);
2780 if (rc)
2781 return rc;
2782
2783 return 0;
2784}
2785
2786static int common_write(void *vkey, void *datum, void *ptr)
2787{
2788 char *key = vkey;
2789 struct common_datum *comdatum = datum;
2790 struct policy_data *pd = ptr;
2791 void *fp = pd->fp;
2792 __le32 buf[4];
2793 size_t len;
2794 int rc;
2795
2796 len = strlen(key);
2797 buf[0] = cpu_to_le32(len);
2798 buf[1] = cpu_to_le32(comdatum->value);
2799 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2800 buf[3] = cpu_to_le32(comdatum->permissions.table->nel);
2801 rc = put_entry(buf, sizeof(u32), 4, fp);
2802 if (rc)
2803 return rc;
2804
2805 rc = put_entry(key, 1, len, fp);
2806 if (rc)
2807 return rc;
2808
2809 rc = hashtab_map(comdatum->permissions.table, perm_write, fp);
2810 if (rc)
2811 return rc;
2812
2813 return 0;
2814}
2815
2816static int type_set_write(struct type_set *t, void *fp)
2817{
2818 int rc;
2819 __le32 buf[1];
2820
2821 if (ebitmap_write(&t->types, fp))
2822 return -EINVAL;
2823 if (ebitmap_write(&t->negset, fp))
2824 return -EINVAL;
2825
2826 buf[0] = cpu_to_le32(t->flags);
2827 rc = put_entry(buf, sizeof(u32), 1, fp);
2828 if (rc)
2829 return -EINVAL;
2830
2831 return 0;
2832}
2833
2834static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2835 void *fp)
2836{
2837 struct constraint_node *c;
2838 struct constraint_expr *e;
2839 __le32 buf[3];
2840 u32 nel;
2841 int rc;
2842
2843 for (c = node; c; c = c->next) {
2844 nel = 0;
2845 for (e = c->expr; e; e = e->next)
2846 nel++;
2847 buf[0] = cpu_to_le32(c->permissions);
2848 buf[1] = cpu_to_le32(nel);
2849 rc = put_entry(buf, sizeof(u32), 2, fp);
2850 if (rc)
2851 return rc;
2852 for (e = c->expr; e; e = e->next) {
2853 buf[0] = cpu_to_le32(e->expr_type);
2854 buf[1] = cpu_to_le32(e->attr);
2855 buf[2] = cpu_to_le32(e->op);
2856 rc = put_entry(buf, sizeof(u32), 3, fp);
2857 if (rc)
2858 return rc;
2859
2860 switch (e->expr_type) {
2861 case CEXPR_NAMES:
2862 rc = ebitmap_write(&e->names, fp);
2863 if (rc)
2864 return rc;
2865 if (p->policyvers >=
2866 POLICYDB_VERSION_CONSTRAINT_NAMES) {
2867 rc = type_set_write(e->type_names, fp);
2868 if (rc)
2869 return rc;
2870 }
2871 break;
2872 default:
2873 break;
2874 }
2875 }
2876 }
2877
2878 return 0;
2879}
2880
2881static int class_write(void *vkey, void *datum, void *ptr)
2882{
2883 char *key = vkey;
2884 struct class_datum *cladatum = datum;
2885 struct policy_data *pd = ptr;
2886 void *fp = pd->fp;
2887 struct policydb *p = pd->p;
2888 struct constraint_node *c;
2889 __le32 buf[6];
2890 u32 ncons;
2891 size_t len, len2;
2892 int rc;
2893
2894 len = strlen(key);
2895 if (cladatum->comkey)
2896 len2 = strlen(cladatum->comkey);
2897 else
2898 len2 = 0;
2899
2900 ncons = 0;
2901 for (c = cladatum->constraints; c; c = c->next)
2902 ncons++;
2903
2904 buf[0] = cpu_to_le32(len);
2905 buf[1] = cpu_to_le32(len2);
2906 buf[2] = cpu_to_le32(cladatum->value);
2907 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
2908 if (cladatum->permissions.table)
2909 buf[4] = cpu_to_le32(cladatum->permissions.table->nel);
2910 else
2911 buf[4] = 0;
2912 buf[5] = cpu_to_le32(ncons);
2913 rc = put_entry(buf, sizeof(u32), 6, fp);
2914 if (rc)
2915 return rc;
2916
2917 rc = put_entry(key, 1, len, fp);
2918 if (rc)
2919 return rc;
2920
2921 if (cladatum->comkey) {
2922 rc = put_entry(cladatum->comkey, 1, len2, fp);
2923 if (rc)
2924 return rc;
2925 }
2926
2927 rc = hashtab_map(cladatum->permissions.table, perm_write, fp);
2928 if (rc)
2929 return rc;
2930
2931 rc = write_cons_helper(p, cladatum->constraints, fp);
2932 if (rc)
2933 return rc;
2934
2935
2936 ncons = 0;
2937 for (c = cladatum->validatetrans; c; c = c->next)
2938 ncons++;
2939
2940 buf[0] = cpu_to_le32(ncons);
2941 rc = put_entry(buf, sizeof(u32), 1, fp);
2942 if (rc)
2943 return rc;
2944
2945 rc = write_cons_helper(p, cladatum->validatetrans, fp);
2946 if (rc)
2947 return rc;
2948
2949 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
2950 buf[0] = cpu_to_le32(cladatum->default_user);
2951 buf[1] = cpu_to_le32(cladatum->default_role);
2952 buf[2] = cpu_to_le32(cladatum->default_range);
2953
2954 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
2955 if (rc)
2956 return rc;
2957 }
2958
2959 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
2960 buf[0] = cpu_to_le32(cladatum->default_type);
2961 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
2962 if (rc)
2963 return rc;
2964 }
2965
2966 return 0;
2967}
2968
2969static int role_write(void *vkey, void *datum, void *ptr)
2970{
2971 char *key = vkey;
2972 struct role_datum *role = datum;
2973 struct policy_data *pd = ptr;
2974 void *fp = pd->fp;
2975 struct policydb *p = pd->p;
2976 __le32 buf[3];
2977 size_t items, len;
2978 int rc;
2979
2980 len = strlen(key);
2981 items = 0;
2982 buf[items++] = cpu_to_le32(len);
2983 buf[items++] = cpu_to_le32(role->value);
2984 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2985 buf[items++] = cpu_to_le32(role->bounds);
2986
2987 BUG_ON(items > ARRAY_SIZE(buf));
2988
2989 rc = put_entry(buf, sizeof(u32), items, fp);
2990 if (rc)
2991 return rc;
2992
2993 rc = put_entry(key, 1, len, fp);
2994 if (rc)
2995 return rc;
2996
2997 rc = ebitmap_write(&role->dominates, fp);
2998 if (rc)
2999 return rc;
3000
3001 rc = ebitmap_write(&role->types, fp);
3002 if (rc)
3003 return rc;
3004
3005 return 0;
3006}
3007
3008static int type_write(void *vkey, void *datum, void *ptr)
3009{
3010 char *key = vkey;
3011 struct type_datum *typdatum = datum;
3012 struct policy_data *pd = ptr;
3013 struct policydb *p = pd->p;
3014 void *fp = pd->fp;
3015 __le32 buf[4];
3016 int rc;
3017 size_t items, len;
3018
3019 len = strlen(key);
3020 items = 0;
3021 buf[items++] = cpu_to_le32(len);
3022 buf[items++] = cpu_to_le32(typdatum->value);
3023 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
3024 u32 properties = 0;
3025
3026 if (typdatum->primary)
3027 properties |= TYPEDATUM_PROPERTY_PRIMARY;
3028
3029 if (typdatum->attribute)
3030 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
3031
3032 buf[items++] = cpu_to_le32(properties);
3033 buf[items++] = cpu_to_le32(typdatum->bounds);
3034 } else {
3035 buf[items++] = cpu_to_le32(typdatum->primary);
3036 }
3037 BUG_ON(items > ARRAY_SIZE(buf));
3038 rc = put_entry(buf, sizeof(u32), items, fp);
3039 if (rc)
3040 return rc;
3041
3042 rc = put_entry(key, 1, len, fp);
3043 if (rc)
3044 return rc;
3045
3046 return 0;
3047}
3048
3049static int user_write(void *vkey, void *datum, void *ptr)
3050{
3051 char *key = vkey;
3052 struct user_datum *usrdatum = datum;
3053 struct policy_data *pd = ptr;
3054 struct policydb *p = pd->p;
3055 void *fp = pd->fp;
3056 __le32 buf[3];
3057 size_t items, len;
3058 int rc;
3059
3060 len = strlen(key);
3061 items = 0;
3062 buf[items++] = cpu_to_le32(len);
3063 buf[items++] = cpu_to_le32(usrdatum->value);
3064 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3065 buf[items++] = cpu_to_le32(usrdatum->bounds);
3066 BUG_ON(items > ARRAY_SIZE(buf));
3067 rc = put_entry(buf, sizeof(u32), items, fp);
3068 if (rc)
3069 return rc;
3070
3071 rc = put_entry(key, 1, len, fp);
3072 if (rc)
3073 return rc;
3074
3075 rc = ebitmap_write(&usrdatum->roles, fp);
3076 if (rc)
3077 return rc;
3078
3079 rc = mls_write_range_helper(&usrdatum->range, fp);
3080 if (rc)
3081 return rc;
3082
3083 rc = mls_write_level(&usrdatum->dfltlevel, fp);
3084 if (rc)
3085 return rc;
3086
3087 return 0;
3088}
3089
3090static int (*write_f[SYM_NUM]) (void *key, void *datum,
3091 void *datap) =
3092{
3093 common_write,
3094 class_write,
3095 role_write,
3096 type_write,
3097 user_write,
3098 cond_write_bool,
3099 sens_write,
3100 cat_write,
3101};
3102
3103static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
3104 void *fp)
3105{
3106 unsigned int i, j, rc;
3107 size_t nel, len;
3108 __le32 buf[3];
3109 u32 nodebuf[8];
3110 struct ocontext *c;
3111 for (i = 0; i < info->ocon_num; i++) {
3112 nel = 0;
3113 for (c = p->ocontexts[i]; c; c = c->next)
3114 nel++;
3115 buf[0] = cpu_to_le32(nel);
3116 rc = put_entry(buf, sizeof(u32), 1, fp);
3117 if (rc)
3118 return rc;
3119 for (c = p->ocontexts[i]; c; c = c->next) {
3120 switch (i) {
3121 case OCON_ISID:
3122 buf[0] = cpu_to_le32(c->sid[0]);
3123 rc = put_entry(buf, sizeof(u32), 1, fp);
3124 if (rc)
3125 return rc;
3126 rc = context_write(p, &c->context[0], fp);
3127 if (rc)
3128 return rc;
3129 break;
3130 case OCON_FS:
3131 case OCON_NETIF:
3132 len = strlen(c->u.name);
3133 buf[0] = cpu_to_le32(len);
3134 rc = put_entry(buf, sizeof(u32), 1, fp);
3135 if (rc)
3136 return rc;
3137 rc = put_entry(c->u.name, 1, len, fp);
3138 if (rc)
3139 return rc;
3140 rc = context_write(p, &c->context[0], fp);
3141 if (rc)
3142 return rc;
3143 rc = context_write(p, &c->context[1], fp);
3144 if (rc)
3145 return rc;
3146 break;
3147 case OCON_PORT:
3148 buf[0] = cpu_to_le32(c->u.port.protocol);
3149 buf[1] = cpu_to_le32(c->u.port.low_port);
3150 buf[2] = cpu_to_le32(c->u.port.high_port);
3151 rc = put_entry(buf, sizeof(u32), 3, fp);
3152 if (rc)
3153 return rc;
3154 rc = context_write(p, &c->context[0], fp);
3155 if (rc)
3156 return rc;
3157 break;
3158 case OCON_NODE:
3159 nodebuf[0] = c->u.node.addr;
3160 nodebuf[1] = c->u.node.mask;
3161 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3162 if (rc)
3163 return rc;
3164 rc = context_write(p, &c->context[0], fp);
3165 if (rc)
3166 return rc;
3167 break;
3168 case OCON_FSUSE:
3169 buf[0] = cpu_to_le32(c->v.behavior);
3170 len = strlen(c->u.name);
3171 buf[1] = cpu_to_le32(len);
3172 rc = put_entry(buf, sizeof(u32), 2, fp);
3173 if (rc)
3174 return rc;
3175 rc = put_entry(c->u.name, 1, len, fp);
3176 if (rc)
3177 return rc;
3178 rc = context_write(p, &c->context[0], fp);
3179 if (rc)
3180 return rc;
3181 break;
3182 case OCON_NODE6:
3183 for (j = 0; j < 4; j++)
3184 nodebuf[j] = c->u.node6.addr[j];
3185 for (j = 0; j < 4; j++)
3186 nodebuf[j + 4] = c->u.node6.mask[j];
3187 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3188 if (rc)
3189 return rc;
3190 rc = context_write(p, &c->context[0], fp);
3191 if (rc)
3192 return rc;
3193 break;
3194 case OCON_IBPKEY:
3195 *((__be64 *)nodebuf) = cpu_to_be64(c->u.ibpkey.subnet_prefix);
3196
3197 nodebuf[2] = cpu_to_le32(c->u.ibpkey.low_pkey);
3198 nodebuf[3] = cpu_to_le32(c->u.ibpkey.high_pkey);
3199
3200 rc = put_entry(nodebuf, sizeof(u32), 4, fp);
3201 if (rc)
3202 return rc;
3203 rc = context_write(p, &c->context[0], fp);
3204 if (rc)
3205 return rc;
3206 break;
3207 case OCON_IBENDPORT:
3208 len = strlen(c->u.ibendport.dev_name);
3209 buf[0] = cpu_to_le32(len);
3210 buf[1] = cpu_to_le32(c->u.ibendport.port);
3211 rc = put_entry(buf, sizeof(u32), 2, fp);
3212 if (rc)
3213 return rc;
3214 rc = put_entry(c->u.ibendport.dev_name, 1, len, fp);
3215 if (rc)
3216 return rc;
3217 rc = context_write(p, &c->context[0], fp);
3218 if (rc)
3219 return rc;
3220 break;
3221 }
3222 }
3223 }
3224 return 0;
3225}
3226
3227static int genfs_write(struct policydb *p, void *fp)
3228{
3229 struct genfs *genfs;
3230 struct ocontext *c;
3231 size_t len;
3232 __le32 buf[1];
3233 int rc;
3234
3235 len = 0;
3236 for (genfs = p->genfs; genfs; genfs = genfs->next)
3237 len++;
3238 buf[0] = cpu_to_le32(len);
3239 rc = put_entry(buf, sizeof(u32), 1, fp);
3240 if (rc)
3241 return rc;
3242 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3243 len = strlen(genfs->fstype);
3244 buf[0] = cpu_to_le32(len);
3245 rc = put_entry(buf, sizeof(u32), 1, fp);
3246 if (rc)
3247 return rc;
3248 rc = put_entry(genfs->fstype, 1, len, fp);
3249 if (rc)
3250 return rc;
3251 len = 0;
3252 for (c = genfs->head; c; c = c->next)
3253 len++;
3254 buf[0] = cpu_to_le32(len);
3255 rc = put_entry(buf, sizeof(u32), 1, fp);
3256 if (rc)
3257 return rc;
3258 for (c = genfs->head; c; c = c->next) {
3259 len = strlen(c->u.name);
3260 buf[0] = cpu_to_le32(len);
3261 rc = put_entry(buf, sizeof(u32), 1, fp);
3262 if (rc)
3263 return rc;
3264 rc = put_entry(c->u.name, 1, len, fp);
3265 if (rc)
3266 return rc;
3267 buf[0] = cpu_to_le32(c->v.sclass);
3268 rc = put_entry(buf, sizeof(u32), 1, fp);
3269 if (rc)
3270 return rc;
3271 rc = context_write(p, &c->context[0], fp);
3272 if (rc)
3273 return rc;
3274 }
3275 }
3276 return 0;
3277}
3278
3279static int hashtab_cnt(void *key, void *data, void *ptr)
3280{
3281 int *cnt = ptr;
3282 *cnt = *cnt + 1;
3283
3284 return 0;
3285}
3286
3287static int range_write_helper(void *key, void *data, void *ptr)
3288{
3289 __le32 buf[2];
3290 struct range_trans *rt = key;
3291 struct mls_range *r = data;
3292 struct policy_data *pd = ptr;
3293 void *fp = pd->fp;
3294 struct policydb *p = pd->p;
3295 int rc;
3296
3297 buf[0] = cpu_to_le32(rt->source_type);
3298 buf[1] = cpu_to_le32(rt->target_type);
3299 rc = put_entry(buf, sizeof(u32), 2, fp);
3300 if (rc)
3301 return rc;
3302 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3303 buf[0] = cpu_to_le32(rt->target_class);
3304 rc = put_entry(buf, sizeof(u32), 1, fp);
3305 if (rc)
3306 return rc;
3307 }
3308 rc = mls_write_range_helper(r, fp);
3309 if (rc)
3310 return rc;
3311
3312 return 0;
3313}
3314
3315static int range_write(struct policydb *p, void *fp)
3316{
3317 __le32 buf[1];
3318 int rc, nel;
3319 struct policy_data pd;
3320
3321 pd.p = p;
3322 pd.fp = fp;
3323
3324
3325 nel = 0;
3326 rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
3327 if (rc)
3328 return rc;
3329
3330 buf[0] = cpu_to_le32(nel);
3331 rc = put_entry(buf, sizeof(u32), 1, fp);
3332 if (rc)
3333 return rc;
3334
3335
3336 rc = hashtab_map(p->range_tr, range_write_helper, &pd);
3337 if (rc)
3338 return rc;
3339
3340 return 0;
3341}
3342
3343static int filename_write_helper(void *key, void *data, void *ptr)
3344{
3345 __le32 buf[4];
3346 struct filename_trans *ft = key;
3347 struct filename_trans_datum *otype = data;
3348 void *fp = ptr;
3349 int rc;
3350 u32 len;
3351
3352 len = strlen(ft->name);
3353 buf[0] = cpu_to_le32(len);
3354 rc = put_entry(buf, sizeof(u32), 1, fp);
3355 if (rc)
3356 return rc;
3357
3358 rc = put_entry(ft->name, sizeof(char), len, fp);
3359 if (rc)
3360 return rc;
3361
3362 buf[0] = cpu_to_le32(ft->stype);
3363 buf[1] = cpu_to_le32(ft->ttype);
3364 buf[2] = cpu_to_le32(ft->tclass);
3365 buf[3] = cpu_to_le32(otype->otype);
3366
3367 rc = put_entry(buf, sizeof(u32), 4, fp);
3368 if (rc)
3369 return rc;
3370
3371 return 0;
3372}
3373
3374static int filename_trans_write(struct policydb *p, void *fp)
3375{
3376 u32 nel;
3377 __le32 buf[1];
3378 int rc;
3379
3380 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3381 return 0;
3382
3383 nel = 0;
3384 rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel);
3385 if (rc)
3386 return rc;
3387
3388 buf[0] = cpu_to_le32(nel);
3389 rc = put_entry(buf, sizeof(u32), 1, fp);
3390 if (rc)
3391 return rc;
3392
3393 rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
3394 if (rc)
3395 return rc;
3396
3397 return 0;
3398}
3399
3400
3401
3402
3403
3404
3405int policydb_write(struct policydb *p, void *fp)
3406{
3407 unsigned int i, num_syms;
3408 int rc;
3409 __le32 buf[4];
3410 u32 config;
3411 size_t len;
3412 struct policydb_compat_info *info;
3413
3414
3415
3416
3417
3418
3419
3420 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3421 pr_err("SELinux: refusing to write policy version %d."
3422 " Because it is less than version %d\n", p->policyvers,
3423 POLICYDB_VERSION_AVTAB);
3424 return -EINVAL;
3425 }
3426
3427 config = 0;
3428 if (p->mls_enabled)
3429 config |= POLICYDB_CONFIG_MLS;
3430
3431 if (p->reject_unknown)
3432 config |= REJECT_UNKNOWN;
3433 if (p->allow_unknown)
3434 config |= ALLOW_UNKNOWN;
3435
3436
3437 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3438 len = strlen(POLICYDB_STRING);
3439 buf[1] = cpu_to_le32(len);
3440 rc = put_entry(buf, sizeof(u32), 2, fp);
3441 if (rc)
3442 return rc;
3443 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3444 if (rc)
3445 return rc;
3446
3447
3448 info = policydb_lookup_compat(p->policyvers);
3449 if (!info) {
3450 pr_err("SELinux: compatibility lookup failed for policy "
3451 "version %d", p->policyvers);
3452 return -EINVAL;
3453 }
3454
3455 buf[0] = cpu_to_le32(p->policyvers);
3456 buf[1] = cpu_to_le32(config);
3457 buf[2] = cpu_to_le32(info->sym_num);
3458 buf[3] = cpu_to_le32(info->ocon_num);
3459
3460 rc = put_entry(buf, sizeof(u32), 4, fp);
3461 if (rc)
3462 return rc;
3463
3464 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3465 rc = ebitmap_write(&p->policycaps, fp);
3466 if (rc)
3467 return rc;
3468 }
3469
3470 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3471 rc = ebitmap_write(&p->permissive_map, fp);
3472 if (rc)
3473 return rc;
3474 }
3475
3476 num_syms = info->sym_num;
3477 for (i = 0; i < num_syms; i++) {
3478 struct policy_data pd;
3479
3480 pd.fp = fp;
3481 pd.p = p;
3482
3483 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3484 buf[1] = cpu_to_le32(p->symtab[i].table->nel);
3485
3486 rc = put_entry(buf, sizeof(u32), 2, fp);
3487 if (rc)
3488 return rc;
3489 rc = hashtab_map(p->symtab[i].table, write_f[i], &pd);
3490 if (rc)
3491 return rc;
3492 }
3493
3494 rc = avtab_write(p, &p->te_avtab, fp);
3495 if (rc)
3496 return rc;
3497
3498 rc = cond_write_list(p, p->cond_list, fp);
3499 if (rc)
3500 return rc;
3501
3502 rc = role_trans_write(p, fp);
3503 if (rc)
3504 return rc;
3505
3506 rc = role_allow_write(p->role_allow, fp);
3507 if (rc)
3508 return rc;
3509
3510 rc = filename_trans_write(p, fp);
3511 if (rc)
3512 return rc;
3513
3514 rc = ocontext_write(p, info, fp);
3515 if (rc)
3516 return rc;
3517
3518 rc = genfs_write(p, fp);
3519 if (rc)
3520 return rc;
3521
3522 rc = range_write(p, fp);
3523 if (rc)
3524 return rc;
3525
3526 for (i = 0; i < p->p_types.nprim; i++) {
3527 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
3528
3529 BUG_ON(!e);
3530 rc = ebitmap_write(e, fp);
3531 if (rc)
3532 return rc;
3533 }
3534
3535 return 0;
3536}
3537
