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