2 * Implementation of the policy database.
4 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
8 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
10 * Support for enhanced MLS infrastructure.
12 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
14 * Added conditional policy language extensions
16 * Updated: Hewlett-Packard <paul.moore@hp.com>
18 * Added support for the policy capability bitmap
20 * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
21 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
22 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
23 * This program is free software; you can redistribute it and/or modify
24 * it under the terms of the GNU General Public License as published by
25 * the Free Software Foundation, version 2.
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>
38 #include "conditional.h"
45 static const char *symtab_name
[SYM_NUM
] = {
57 static unsigned int symtab_sizes
[SYM_NUM
] = {
68 struct policydb_compat_info
{
74 /* These need to be updated if SYM_NUM or OCON_NUM changes */
75 static struct policydb_compat_info policydb_compat
[] = {
77 .version
= POLICYDB_VERSION_BASE
,
78 .sym_num
= SYM_NUM
- 3,
79 .ocon_num
= OCON_NUM
- 1,
82 .version
= POLICYDB_VERSION_BOOL
,
83 .sym_num
= SYM_NUM
- 2,
84 .ocon_num
= OCON_NUM
- 1,
87 .version
= POLICYDB_VERSION_IPV6
,
88 .sym_num
= SYM_NUM
- 2,
92 .version
= POLICYDB_VERSION_NLCLASS
,
93 .sym_num
= SYM_NUM
- 2,
97 .version
= POLICYDB_VERSION_MLS
,
102 .version
= POLICYDB_VERSION_AVTAB
,
104 .ocon_num
= OCON_NUM
,
107 .version
= POLICYDB_VERSION_RANGETRANS
,
109 .ocon_num
= OCON_NUM
,
112 .version
= POLICYDB_VERSION_POLCAP
,
114 .ocon_num
= OCON_NUM
,
117 .version
= POLICYDB_VERSION_PERMISSIVE
,
119 .ocon_num
= OCON_NUM
,
122 .version
= POLICYDB_VERSION_BOUNDARY
,
124 .ocon_num
= OCON_NUM
,
128 static struct policydb_compat_info
*policydb_lookup_compat(int version
)
131 struct policydb_compat_info
*info
= NULL
;
133 for (i
= 0; i
< ARRAY_SIZE(policydb_compat
); i
++) {
134 if (policydb_compat
[i
].version
== version
) {
135 info
= &policydb_compat
[i
];
143 * Initialize the role table.
145 static int roles_init(struct policydb
*p
)
149 struct role_datum
*role
;
151 role
= kzalloc(sizeof(*role
), GFP_KERNEL
);
156 role
->value
= ++p
->p_roles
.nprim
;
157 if (role
->value
!= OBJECT_R_VAL
) {
161 key
= kstrdup(OBJECT_R
, GFP_KERNEL
);
166 rc
= hashtab_insert(p
->p_roles
.table
, key
, role
);
179 static u32
rangetr_hash(struct hashtab
*h
, const void *k
)
181 const struct range_trans
*key
= k
;
182 return (key
->source_type
+ (key
->target_type
<< 3) +
183 (key
->target_class
<< 5)) & (h
->size
- 1);
186 static int rangetr_cmp(struct hashtab
*h
, const void *k1
, const void *k2
)
188 const struct range_trans
*key1
= k1
, *key2
= k2
;
191 v
= key1
->source_type
- key2
->source_type
;
195 v
= key1
->target_type
- key2
->target_type
;
199 v
= key1
->target_class
- key2
->target_class
;
205 * Initialize a policy database structure.
207 static int policydb_init(struct policydb
*p
)
211 memset(p
, 0, sizeof(*p
));
213 for (i
= 0; i
< SYM_NUM
; i
++) {
214 rc
= symtab_init(&p
->symtab
[i
], symtab_sizes
[i
]);
216 goto out_free_symtab
;
219 rc
= avtab_init(&p
->te_avtab
);
221 goto out_free_symtab
;
225 goto out_free_symtab
;
227 rc
= cond_policydb_init(p
);
229 goto out_free_symtab
;
231 p
->range_tr
= hashtab_create(rangetr_hash
, rangetr_cmp
, 256);
233 goto out_free_symtab
;
235 ebitmap_init(&p
->policycaps
);
236 ebitmap_init(&p
->permissive_map
);
242 for (i
= 0; i
< SYM_NUM
; i
++)
243 hashtab_destroy(p
->symtab
[i
].table
);
248 * The following *_index functions are used to
249 * define the val_to_name and val_to_struct arrays
250 * in a policy database structure. The val_to_name
251 * arrays are used when converting security context
252 * structures into string representations. The
253 * val_to_struct arrays are used when the attributes
254 * of a class, role, or user are needed.
257 static int common_index(void *key
, void *datum
, void *datap
)
260 struct common_datum
*comdatum
;
264 if (!comdatum
->value
|| comdatum
->value
> p
->p_commons
.nprim
)
266 p
->p_common_val_to_name
[comdatum
->value
- 1] = key
;
270 static int class_index(void *key
, void *datum
, void *datap
)
273 struct class_datum
*cladatum
;
277 if (!cladatum
->value
|| cladatum
->value
> p
->p_classes
.nprim
)
279 p
->p_class_val_to_name
[cladatum
->value
- 1] = key
;
280 p
->class_val_to_struct
[cladatum
->value
- 1] = cladatum
;
284 static int role_index(void *key
, void *datum
, void *datap
)
287 struct role_datum
*role
;
292 || role
->value
> p
->p_roles
.nprim
293 || role
->bounds
> p
->p_roles
.nprim
)
295 p
->p_role_val_to_name
[role
->value
- 1] = key
;
296 p
->role_val_to_struct
[role
->value
- 1] = role
;
300 static int type_index(void *key
, void *datum
, void *datap
)
303 struct type_datum
*typdatum
;
308 if (typdatum
->primary
) {
310 || typdatum
->value
> p
->p_types
.nprim
311 || typdatum
->bounds
> p
->p_types
.nprim
)
313 p
->p_type_val_to_name
[typdatum
->value
- 1] = key
;
314 p
->type_val_to_struct
[typdatum
->value
- 1] = typdatum
;
320 static int user_index(void *key
, void *datum
, void *datap
)
323 struct user_datum
*usrdatum
;
328 || usrdatum
->value
> p
->p_users
.nprim
329 || usrdatum
->bounds
> p
->p_users
.nprim
)
331 p
->p_user_val_to_name
[usrdatum
->value
- 1] = key
;
332 p
->user_val_to_struct
[usrdatum
->value
- 1] = usrdatum
;
336 static int sens_index(void *key
, void *datum
, void *datap
)
339 struct level_datum
*levdatum
;
344 if (!levdatum
->isalias
) {
345 if (!levdatum
->level
->sens
||
346 levdatum
->level
->sens
> p
->p_levels
.nprim
)
348 p
->p_sens_val_to_name
[levdatum
->level
->sens
- 1] = key
;
354 static int cat_index(void *key
, void *datum
, void *datap
)
357 struct cat_datum
*catdatum
;
362 if (!catdatum
->isalias
) {
363 if (!catdatum
->value
|| catdatum
->value
> p
->p_cats
.nprim
)
365 p
->p_cat_val_to_name
[catdatum
->value
- 1] = key
;
371 static int (*index_f
[SYM_NUM
]) (void *key
, void *datum
, void *datap
) =
384 * Define the common val_to_name array and the class
385 * val_to_name and val_to_struct arrays in a policy
386 * database structure.
388 * Caller must clean up upon failure.
390 static int policydb_index_classes(struct policydb
*p
)
394 p
->p_common_val_to_name
=
395 kmalloc(p
->p_commons
.nprim
* sizeof(char *), GFP_KERNEL
);
396 if (!p
->p_common_val_to_name
) {
401 rc
= hashtab_map(p
->p_commons
.table
, common_index
, p
);
405 p
->class_val_to_struct
=
406 kmalloc(p
->p_classes
.nprim
* sizeof(*(p
->class_val_to_struct
)), GFP_KERNEL
);
407 if (!p
->class_val_to_struct
) {
412 p
->p_class_val_to_name
=
413 kmalloc(p
->p_classes
.nprim
* sizeof(char *), GFP_KERNEL
);
414 if (!p
->p_class_val_to_name
) {
419 rc
= hashtab_map(p
->p_classes
.table
, class_index
, p
);
425 static void symtab_hash_eval(struct symtab
*s
)
429 for (i
= 0; i
< SYM_NUM
; i
++) {
430 struct hashtab
*h
= s
[i
].table
;
431 struct hashtab_info info
;
433 hashtab_stat(h
, &info
);
434 printk(KERN_DEBUG
"SELinux: %s: %d entries and %d/%d buckets used, "
435 "longest chain length %d\n", symtab_name
[i
], h
->nel
,
436 info
.slots_used
, h
->size
, info
.max_chain_len
);
440 static void rangetr_hash_eval(struct hashtab
*h
)
442 struct hashtab_info info
;
444 hashtab_stat(h
, &info
);
445 printk(KERN_DEBUG
"SELinux: rangetr: %d entries and %d/%d buckets used, "
446 "longest chain length %d\n", h
->nel
,
447 info
.slots_used
, h
->size
, info
.max_chain_len
);
450 static inline void rangetr_hash_eval(struct hashtab
*h
)
456 * Define the other val_to_name and val_to_struct arrays
457 * in a policy database structure.
459 * Caller must clean up on failure.
461 static int policydb_index_others(struct policydb
*p
)
465 printk(KERN_DEBUG
"SELinux: %d users, %d roles, %d types, %d bools",
466 p
->p_users
.nprim
, p
->p_roles
.nprim
, p
->p_types
.nprim
, p
->p_bools
.nprim
);
468 printk(", %d sens, %d cats", p
->p_levels
.nprim
,
472 printk(KERN_DEBUG
"SELinux: %d classes, %d rules\n",
473 p
->p_classes
.nprim
, p
->te_avtab
.nel
);
476 avtab_hash_eval(&p
->te_avtab
, "rules");
477 symtab_hash_eval(p
->symtab
);
480 p
->role_val_to_struct
=
481 kmalloc(p
->p_roles
.nprim
* sizeof(*(p
->role_val_to_struct
)),
483 if (!p
->role_val_to_struct
) {
488 p
->user_val_to_struct
=
489 kmalloc(p
->p_users
.nprim
* sizeof(*(p
->user_val_to_struct
)),
491 if (!p
->user_val_to_struct
) {
496 p
->type_val_to_struct
=
497 kmalloc(p
->p_types
.nprim
* sizeof(*(p
->type_val_to_struct
)),
499 if (!p
->type_val_to_struct
) {
504 if (cond_init_bool_indexes(p
)) {
509 for (i
= SYM_ROLES
; i
< SYM_NUM
; i
++) {
510 p
->sym_val_to_name
[i
] =
511 kmalloc(p
->symtab
[i
].nprim
* sizeof(char *), GFP_KERNEL
);
512 if (!p
->sym_val_to_name
[i
]) {
516 rc
= hashtab_map(p
->symtab
[i
].table
, index_f
[i
], p
);
526 * The following *_destroy functions are used to
527 * free any memory allocated for each kind of
528 * symbol data in the policy database.
531 static int perm_destroy(void *key
, void *datum
, void *p
)
538 static int common_destroy(void *key
, void *datum
, void *p
)
540 struct common_datum
*comdatum
;
544 hashtab_map(comdatum
->permissions
.table
, perm_destroy
, NULL
);
545 hashtab_destroy(comdatum
->permissions
.table
);
550 static int cls_destroy(void *key
, void *datum
, void *p
)
552 struct class_datum
*cladatum
;
553 struct constraint_node
*constraint
, *ctemp
;
554 struct constraint_expr
*e
, *etmp
;
558 hashtab_map(cladatum
->permissions
.table
, perm_destroy
, NULL
);
559 hashtab_destroy(cladatum
->permissions
.table
);
560 constraint
= cladatum
->constraints
;
562 e
= constraint
->expr
;
564 ebitmap_destroy(&e
->names
);
570 constraint
= constraint
->next
;
574 constraint
= cladatum
->validatetrans
;
576 e
= constraint
->expr
;
578 ebitmap_destroy(&e
->names
);
584 constraint
= constraint
->next
;
588 kfree(cladatum
->comkey
);
593 static int role_destroy(void *key
, void *datum
, void *p
)
595 struct role_datum
*role
;
599 ebitmap_destroy(&role
->dominates
);
600 ebitmap_destroy(&role
->types
);
605 static int type_destroy(void *key
, void *datum
, void *p
)
612 static int user_destroy(void *key
, void *datum
, void *p
)
614 struct user_datum
*usrdatum
;
618 ebitmap_destroy(&usrdatum
->roles
);
619 ebitmap_destroy(&usrdatum
->range
.level
[0].cat
);
620 ebitmap_destroy(&usrdatum
->range
.level
[1].cat
);
621 ebitmap_destroy(&usrdatum
->dfltlevel
.cat
);
626 static int sens_destroy(void *key
, void *datum
, void *p
)
628 struct level_datum
*levdatum
;
632 ebitmap_destroy(&levdatum
->level
->cat
);
633 kfree(levdatum
->level
);
638 static int cat_destroy(void *key
, void *datum
, void *p
)
645 static int (*destroy_f
[SYM_NUM
]) (void *key
, void *datum
, void *datap
) =
657 static int range_tr_destroy(void *key
, void *datum
, void *p
)
659 struct mls_range
*rt
= datum
;
661 ebitmap_destroy(&rt
->level
[0].cat
);
662 ebitmap_destroy(&rt
->level
[1].cat
);
668 static void ocontext_destroy(struct ocontext
*c
, int i
)
673 context_destroy(&c
->context
[0]);
674 context_destroy(&c
->context
[1]);
675 if (i
== OCON_ISID
|| i
== OCON_FS
||
676 i
== OCON_NETIF
|| i
== OCON_FSUSE
)
682 * Free any memory allocated by a policy database structure.
684 void policydb_destroy(struct policydb
*p
)
686 struct ocontext
*c
, *ctmp
;
687 struct genfs
*g
, *gtmp
;
689 struct role_allow
*ra
, *lra
= NULL
;
690 struct role_trans
*tr
, *ltr
= NULL
;
692 for (i
= 0; i
< SYM_NUM
; i
++) {
694 hashtab_map(p
->symtab
[i
].table
, destroy_f
[i
], NULL
);
695 hashtab_destroy(p
->symtab
[i
].table
);
698 for (i
= 0; i
< SYM_NUM
; i
++)
699 kfree(p
->sym_val_to_name
[i
]);
701 kfree(p
->class_val_to_struct
);
702 kfree(p
->role_val_to_struct
);
703 kfree(p
->user_val_to_struct
);
704 kfree(p
->type_val_to_struct
);
706 avtab_destroy(&p
->te_avtab
);
708 for (i
= 0; i
< OCON_NUM
; i
++) {
714 ocontext_destroy(ctmp
, i
);
716 p
->ocontexts
[i
] = NULL
;
727 ocontext_destroy(ctmp
, OCON_FSUSE
);
735 cond_policydb_destroy(p
);
737 for (tr
= p
->role_tr
; tr
; tr
= tr
->next
) {
744 for (ra
= p
->role_allow
; ra
; ra
= ra
->next
) {
751 hashtab_map(p
->range_tr
, range_tr_destroy
, NULL
);
752 hashtab_destroy(p
->range_tr
);
754 if (p
->type_attr_map_array
) {
755 for (i
= 0; i
< p
->p_types
.nprim
; i
++) {
758 e
= flex_array_get(p
->type_attr_map_array
, i
);
763 flex_array_free(p
->type_attr_map_array
);
765 ebitmap_destroy(&p
->policycaps
);
766 ebitmap_destroy(&p
->permissive_map
);
772 * Load the initial SIDs specified in a policy database
773 * structure into a SID table.
775 int policydb_load_isids(struct policydb
*p
, struct sidtab
*s
)
777 struct ocontext
*head
, *c
;
782 printk(KERN_ERR
"SELinux: out of memory on SID table init\n");
786 head
= p
->ocontexts
[OCON_ISID
];
787 for (c
= head
; c
; c
= c
->next
) {
788 if (!c
->context
[0].user
) {
789 printk(KERN_ERR
"SELinux: SID %s was never "
790 "defined.\n", c
->u
.name
);
794 if (sidtab_insert(s
, c
->sid
[0], &c
->context
[0])) {
795 printk(KERN_ERR
"SELinux: unable to load initial "
796 "SID %s.\n", c
->u
.name
);
805 int policydb_class_isvalid(struct policydb
*p
, unsigned int class)
807 if (!class || class > p
->p_classes
.nprim
)
812 int policydb_role_isvalid(struct policydb
*p
, unsigned int role
)
814 if (!role
|| role
> p
->p_roles
.nprim
)
819 int policydb_type_isvalid(struct policydb
*p
, unsigned int type
)
821 if (!type
|| type
> p
->p_types
.nprim
)
827 * Return 1 if the fields in the security context
828 * structure `c' are valid. Return 0 otherwise.
830 int policydb_context_isvalid(struct policydb
*p
, struct context
*c
)
832 struct role_datum
*role
;
833 struct user_datum
*usrdatum
;
835 if (!c
->role
|| c
->role
> p
->p_roles
.nprim
)
838 if (!c
->user
|| c
->user
> p
->p_users
.nprim
)
841 if (!c
->type
|| c
->type
> p
->p_types
.nprim
)
844 if (c
->role
!= OBJECT_R_VAL
) {
846 * Role must be authorized for the type.
848 role
= p
->role_val_to_struct
[c
->role
- 1];
849 if (!ebitmap_get_bit(&role
->types
,
851 /* role may not be associated with type */
855 * User must be authorized for the role.
857 usrdatum
= p
->user_val_to_struct
[c
->user
- 1];
861 if (!ebitmap_get_bit(&usrdatum
->roles
,
863 /* user may not be associated with role */
867 if (!mls_context_isvalid(p
, c
))
874 * Read a MLS range structure from a policydb binary
875 * representation file.
877 static int mls_read_range_helper(struct mls_range
*r
, void *fp
)
883 rc
= next_entry(buf
, fp
, sizeof(u32
));
887 items
= le32_to_cpu(buf
[0]);
888 if (items
> ARRAY_SIZE(buf
)) {
889 printk(KERN_ERR
"SELinux: mls: range overflow\n");
893 rc
= next_entry(buf
, fp
, sizeof(u32
) * items
);
895 printk(KERN_ERR
"SELinux: mls: truncated range\n");
898 r
->level
[0].sens
= le32_to_cpu(buf
[0]);
900 r
->level
[1].sens
= le32_to_cpu(buf
[1]);
902 r
->level
[1].sens
= r
->level
[0].sens
;
904 rc
= ebitmap_read(&r
->level
[0].cat
, fp
);
906 printk(KERN_ERR
"SELinux: mls: error reading low "
911 rc
= ebitmap_read(&r
->level
[1].cat
, fp
);
913 printk(KERN_ERR
"SELinux: mls: error reading high "
918 rc
= ebitmap_cpy(&r
->level
[1].cat
, &r
->level
[0].cat
);
920 printk(KERN_ERR
"SELinux: mls: out of memory\n");
929 ebitmap_destroy(&r
->level
[0].cat
);
934 * Read and validate a security context structure
935 * from a policydb binary representation file.
937 static int context_read_and_validate(struct context
*c
,
944 rc
= next_entry(buf
, fp
, sizeof buf
);
946 printk(KERN_ERR
"SELinux: context truncated\n");
949 c
->user
= le32_to_cpu(buf
[0]);
950 c
->role
= le32_to_cpu(buf
[1]);
951 c
->type
= le32_to_cpu(buf
[2]);
952 if (p
->policyvers
>= POLICYDB_VERSION_MLS
) {
953 if (mls_read_range_helper(&c
->range
, fp
)) {
954 printk(KERN_ERR
"SELinux: error reading MLS range of "
961 if (!policydb_context_isvalid(p
, c
)) {
962 printk(KERN_ERR
"SELinux: invalid security context\n");
971 * The following *_read functions are used to
972 * read the symbol data from a policy database
973 * binary representation file.
976 static int perm_read(struct policydb
*p
, struct hashtab
*h
, void *fp
)
979 struct perm_datum
*perdatum
;
984 perdatum
= kzalloc(sizeof(*perdatum
), GFP_KERNEL
);
990 rc
= next_entry(buf
, fp
, sizeof buf
);
994 len
= le32_to_cpu(buf
[0]);
995 perdatum
->value
= le32_to_cpu(buf
[1]);
997 key
= kmalloc(len
+ 1, GFP_KERNEL
);
1002 rc
= next_entry(key
, fp
, len
);
1007 rc
= hashtab_insert(h
, key
, perdatum
);
1013 perm_destroy(key
, perdatum
, NULL
);
1017 static int common_read(struct policydb
*p
, struct hashtab
*h
, void *fp
)
1020 struct common_datum
*comdatum
;
1025 comdatum
= kzalloc(sizeof(*comdatum
), GFP_KERNEL
);
1031 rc
= next_entry(buf
, fp
, sizeof buf
);
1035 len
= le32_to_cpu(buf
[0]);
1036 comdatum
->value
= le32_to_cpu(buf
[1]);
1038 rc
= symtab_init(&comdatum
->permissions
, PERM_SYMTAB_SIZE
);
1041 comdatum
->permissions
.nprim
= le32_to_cpu(buf
[2]);
1042 nel
= le32_to_cpu(buf
[3]);
1044 key
= kmalloc(len
+ 1, GFP_KERNEL
);
1049 rc
= next_entry(key
, fp
, len
);
1054 for (i
= 0; i
< nel
; i
++) {
1055 rc
= perm_read(p
, comdatum
->permissions
.table
, fp
);
1060 rc
= hashtab_insert(h
, key
, comdatum
);
1066 common_destroy(key
, comdatum
, NULL
);
1070 static int read_cons_helper(struct constraint_node
**nodep
, int ncons
,
1071 int allowxtarget
, void *fp
)
1073 struct constraint_node
*c
, *lc
;
1074 struct constraint_expr
*e
, *le
;
1077 int rc
, i
, j
, depth
;
1080 for (i
= 0; i
< ncons
; i
++) {
1081 c
= kzalloc(sizeof(*c
), GFP_KERNEL
);
1090 rc
= next_entry(buf
, fp
, (sizeof(u32
) * 2));
1093 c
->permissions
= le32_to_cpu(buf
[0]);
1094 nexpr
= le32_to_cpu(buf
[1]);
1097 for (j
= 0; j
< nexpr
; j
++) {
1098 e
= kzalloc(sizeof(*e
), GFP_KERNEL
);
1107 rc
= next_entry(buf
, fp
, (sizeof(u32
) * 3));
1110 e
->expr_type
= le32_to_cpu(buf
[0]);
1111 e
->attr
= le32_to_cpu(buf
[1]);
1112 e
->op
= le32_to_cpu(buf
[2]);
1114 switch (e
->expr_type
) {
1126 if (depth
== (CEXPR_MAXDEPTH
- 1))
1131 if (!allowxtarget
&& (e
->attr
& CEXPR_XTARGET
))
1133 if (depth
== (CEXPR_MAXDEPTH
- 1))
1136 if (ebitmap_read(&e
->names
, fp
))
1152 static int class_read(struct policydb
*p
, struct hashtab
*h
, void *fp
)
1155 struct class_datum
*cladatum
;
1157 u32 len
, len2
, ncons
, nel
;
1160 cladatum
= kzalloc(sizeof(*cladatum
), GFP_KERNEL
);
1166 rc
= next_entry(buf
, fp
, sizeof(u32
)*6);
1170 len
= le32_to_cpu(buf
[0]);
1171 len2
= le32_to_cpu(buf
[1]);
1172 cladatum
->value
= le32_to_cpu(buf
[2]);
1174 rc
= symtab_init(&cladatum
->permissions
, PERM_SYMTAB_SIZE
);
1177 cladatum
->permissions
.nprim
= le32_to_cpu(buf
[3]);
1178 nel
= le32_to_cpu(buf
[4]);
1180 ncons
= le32_to_cpu(buf
[5]);
1182 key
= kmalloc(len
+ 1, GFP_KERNEL
);
1187 rc
= next_entry(key
, fp
, len
);
1193 cladatum
->comkey
= kmalloc(len2
+ 1, GFP_KERNEL
);
1194 if (!cladatum
->comkey
) {
1198 rc
= next_entry(cladatum
->comkey
, fp
, len2
);
1201 cladatum
->comkey
[len2
] = '\0';
1203 cladatum
->comdatum
= hashtab_search(p
->p_commons
.table
,
1205 if (!cladatum
->comdatum
) {
1206 printk(KERN_ERR
"SELinux: unknown common %s\n",
1212 for (i
= 0; i
< nel
; i
++) {
1213 rc
= perm_read(p
, cladatum
->permissions
.table
, fp
);
1218 rc
= read_cons_helper(&cladatum
->constraints
, ncons
, 0, fp
);
1222 if (p
->policyvers
>= POLICYDB_VERSION_VALIDATETRANS
) {
1223 /* grab the validatetrans rules */
1224 rc
= next_entry(buf
, fp
, sizeof(u32
));
1227 ncons
= le32_to_cpu(buf
[0]);
1228 rc
= read_cons_helper(&cladatum
->validatetrans
, ncons
, 1, fp
);
1233 rc
= hashtab_insert(h
, key
, cladatum
);
1241 cls_destroy(key
, cladatum
, NULL
);
1245 static int role_read(struct policydb
*p
, struct hashtab
*h
, void *fp
)
1248 struct role_datum
*role
;
1249 int rc
, to_read
= 2;
1253 role
= kzalloc(sizeof(*role
), GFP_KERNEL
);
1259 if (p
->policyvers
>= POLICYDB_VERSION_BOUNDARY
)
1262 rc
= next_entry(buf
, fp
, sizeof(buf
[0]) * to_read
);
1266 len
= le32_to_cpu(buf
[0]);
1267 role
->value
= le32_to_cpu(buf
[1]);
1268 if (p
->policyvers
>= POLICYDB_VERSION_BOUNDARY
)
1269 role
->bounds
= le32_to_cpu(buf
[2]);
1271 key
= kmalloc(len
+ 1, GFP_KERNEL
);
1276 rc
= next_entry(key
, fp
, len
);
1281 rc
= ebitmap_read(&role
->dominates
, fp
);
1285 rc
= ebitmap_read(&role
->types
, fp
);
1289 if (strcmp(key
, OBJECT_R
) == 0) {
1290 if (role
->value
!= OBJECT_R_VAL
) {
1291 printk(KERN_ERR
"SELinux: Role %s has wrong value %d\n",
1292 OBJECT_R
, role
->value
);
1300 rc
= hashtab_insert(h
, key
, role
);
1306 role_destroy(key
, role
, NULL
);
1310 static int type_read(struct policydb
*p
, struct hashtab
*h
, void *fp
)
1313 struct type_datum
*typdatum
;
1314 int rc
, to_read
= 3;
1318 typdatum
= kzalloc(sizeof(*typdatum
), GFP_KERNEL
);
1324 if (p
->policyvers
>= POLICYDB_VERSION_BOUNDARY
)
1327 rc
= next_entry(buf
, fp
, sizeof(buf
[0]) * to_read
);
1331 len
= le32_to_cpu(buf
[0]);
1332 typdatum
->value
= le32_to_cpu(buf
[1]);
1333 if (p
->policyvers
>= POLICYDB_VERSION_BOUNDARY
) {
1334 u32 prop
= le32_to_cpu(buf
[2]);
1336 if (prop
& TYPEDATUM_PROPERTY_PRIMARY
)
1337 typdatum
->primary
= 1;
1338 if (prop
& TYPEDATUM_PROPERTY_ATTRIBUTE
)
1339 typdatum
->attribute
= 1;
1341 typdatum
->bounds
= le32_to_cpu(buf
[3]);
1343 typdatum
->primary
= le32_to_cpu(buf
[2]);
1346 key
= kmalloc(len
+ 1, GFP_KERNEL
);
1351 rc
= next_entry(key
, fp
, len
);
1356 rc
= hashtab_insert(h
, key
, typdatum
);
1362 type_destroy(key
, typdatum
, NULL
);
1368 * Read a MLS level structure from a policydb binary
1369 * representation file.
1371 static int mls_read_level(struct mls_level
*lp
, void *fp
)
1376 memset(lp
, 0, sizeof(*lp
));
1378 rc
= next_entry(buf
, fp
, sizeof buf
);
1380 printk(KERN_ERR
"SELinux: mls: truncated level\n");
1383 lp
->sens
= le32_to_cpu(buf
[0]);
1385 if (ebitmap_read(&lp
->cat
, fp
)) {
1386 printk(KERN_ERR
"SELinux: mls: error reading level "
1397 static int user_read(struct policydb
*p
, struct hashtab
*h
, void *fp
)
1400 struct user_datum
*usrdatum
;
1401 int rc
, to_read
= 2;
1405 usrdatum
= kzalloc(sizeof(*usrdatum
), GFP_KERNEL
);
1411 if (p
->policyvers
>= POLICYDB_VERSION_BOUNDARY
)
1414 rc
= next_entry(buf
, fp
, sizeof(buf
[0]) * to_read
);
1418 len
= le32_to_cpu(buf
[0]);
1419 usrdatum
->value
= le32_to_cpu(buf
[1]);
1420 if (p
->policyvers
>= POLICYDB_VERSION_BOUNDARY
)
1421 usrdatum
->bounds
= le32_to_cpu(buf
[2]);
1423 key
= kmalloc(len
+ 1, GFP_KERNEL
);
1428 rc
= next_entry(key
, fp
, len
);
1433 rc
= ebitmap_read(&usrdatum
->roles
, fp
);
1437 if (p
->policyvers
>= POLICYDB_VERSION_MLS
) {
1438 rc
= mls_read_range_helper(&usrdatum
->range
, fp
);
1441 rc
= mls_read_level(&usrdatum
->dfltlevel
, fp
);
1446 rc
= hashtab_insert(h
, key
, usrdatum
);
1452 user_destroy(key
, usrdatum
, NULL
);
1456 static int sens_read(struct policydb
*p
, struct hashtab
*h
, void *fp
)
1459 struct level_datum
*levdatum
;
1464 levdatum
= kzalloc(sizeof(*levdatum
), GFP_ATOMIC
);
1470 rc
= next_entry(buf
, fp
, sizeof buf
);
1474 len
= le32_to_cpu(buf
[0]);
1475 levdatum
->isalias
= le32_to_cpu(buf
[1]);
1477 key
= kmalloc(len
+ 1, GFP_ATOMIC
);
1482 rc
= next_entry(key
, fp
, len
);
1487 levdatum
->level
= kmalloc(sizeof(struct mls_level
), GFP_ATOMIC
);
1488 if (!levdatum
->level
) {
1492 if (mls_read_level(levdatum
->level
, fp
)) {
1497 rc
= hashtab_insert(h
, key
, levdatum
);
1503 sens_destroy(key
, levdatum
, NULL
);
1507 static int cat_read(struct policydb
*p
, struct hashtab
*h
, void *fp
)
1510 struct cat_datum
*catdatum
;
1515 catdatum
= kzalloc(sizeof(*catdatum
), GFP_ATOMIC
);
1521 rc
= next_entry(buf
, fp
, sizeof buf
);
1525 len
= le32_to_cpu(buf
[0]);
1526 catdatum
->value
= le32_to_cpu(buf
[1]);
1527 catdatum
->isalias
= le32_to_cpu(buf
[2]);
1529 key
= kmalloc(len
+ 1, GFP_ATOMIC
);
1534 rc
= next_entry(key
, fp
, len
);
1539 rc
= hashtab_insert(h
, key
, catdatum
);
1546 cat_destroy(key
, catdatum
, NULL
);
1550 static int (*read_f
[SYM_NUM
]) (struct policydb
*p
, struct hashtab
*h
, void *fp
) =
1562 static int user_bounds_sanity_check(void *key
, void *datum
, void *datap
)
1564 struct user_datum
*upper
, *user
;
1565 struct policydb
*p
= datap
;
1568 upper
= user
= datum
;
1569 while (upper
->bounds
) {
1570 struct ebitmap_node
*node
;
1573 if (++depth
== POLICYDB_BOUNDS_MAXDEPTH
) {
1574 printk(KERN_ERR
"SELinux: user %s: "
1575 "too deep or looped boundary",
1580 upper
= p
->user_val_to_struct
[upper
->bounds
- 1];
1581 ebitmap_for_each_positive_bit(&user
->roles
, node
, bit
) {
1582 if (ebitmap_get_bit(&upper
->roles
, bit
))
1586 "SELinux: boundary violated policy: "
1587 "user=%s role=%s bounds=%s\n",
1588 p
->p_user_val_to_name
[user
->value
- 1],
1589 p
->p_role_val_to_name
[bit
],
1590 p
->p_user_val_to_name
[upper
->value
- 1]);
1599 static int role_bounds_sanity_check(void *key
, void *datum
, void *datap
)
1601 struct role_datum
*upper
, *role
;
1602 struct policydb
*p
= datap
;
1605 upper
= role
= datum
;
1606 while (upper
->bounds
) {
1607 struct ebitmap_node
*node
;
1610 if (++depth
== POLICYDB_BOUNDS_MAXDEPTH
) {
1611 printk(KERN_ERR
"SELinux: role %s: "
1612 "too deep or looped bounds\n",
1617 upper
= p
->role_val_to_struct
[upper
->bounds
- 1];
1618 ebitmap_for_each_positive_bit(&role
->types
, node
, bit
) {
1619 if (ebitmap_get_bit(&upper
->types
, bit
))
1623 "SELinux: boundary violated policy: "
1624 "role=%s type=%s bounds=%s\n",
1625 p
->p_role_val_to_name
[role
->value
- 1],
1626 p
->p_type_val_to_name
[bit
],
1627 p
->p_role_val_to_name
[upper
->value
- 1]);
1636 static int type_bounds_sanity_check(void *key
, void *datum
, void *datap
)
1638 struct type_datum
*upper
;
1639 struct policydb
*p
= datap
;
1643 while (upper
->bounds
) {
1644 if (++depth
== POLICYDB_BOUNDS_MAXDEPTH
) {
1645 printk(KERN_ERR
"SELinux: type %s: "
1646 "too deep or looped boundary\n",
1651 upper
= p
->type_val_to_struct
[upper
->bounds
- 1];
1652 if (upper
->attribute
) {
1653 printk(KERN_ERR
"SELinux: type %s: "
1654 "bounded by attribute %s",
1656 p
->p_type_val_to_name
[upper
->value
- 1]);
1664 static int policydb_bounds_sanity_check(struct policydb
*p
)
1668 if (p
->policyvers
< POLICYDB_VERSION_BOUNDARY
)
1671 rc
= hashtab_map(p
->p_users
.table
,
1672 user_bounds_sanity_check
, p
);
1676 rc
= hashtab_map(p
->p_roles
.table
,
1677 role_bounds_sanity_check
, p
);
1681 rc
= hashtab_map(p
->p_types
.table
,
1682 type_bounds_sanity_check
, p
);
1689 extern int ss_initialized
;
1691 u16
string_to_security_class(struct policydb
*p
, const char *name
)
1693 struct class_datum
*cladatum
;
1695 cladatum
= hashtab_search(p
->p_classes
.table
, name
);
1699 return cladatum
->value
;
1702 u32
string_to_av_perm(struct policydb
*p
, u16 tclass
, const char *name
)
1704 struct class_datum
*cladatum
;
1705 struct perm_datum
*perdatum
= NULL
;
1706 struct common_datum
*comdatum
;
1708 if (!tclass
|| tclass
> p
->p_classes
.nprim
)
1711 cladatum
= p
->class_val_to_struct
[tclass
-1];
1712 comdatum
= cladatum
->comdatum
;
1714 perdatum
= hashtab_search(comdatum
->permissions
.table
,
1717 perdatum
= hashtab_search(cladatum
->permissions
.table
,
1722 return 1U << (perdatum
->value
-1);
1725 static int range_read(struct policydb
*p
, void *fp
)
1727 struct range_trans
*rt
= NULL
;
1728 struct mls_range
*r
= NULL
;
1733 if (p
->policyvers
< POLICYDB_VERSION_MLS
)
1736 rc
= next_entry(buf
, fp
, sizeof(u32
));
1740 nel
= le32_to_cpu(buf
[0]);
1741 for (i
= 0; i
< nel
; i
++) {
1743 rt
= kzalloc(sizeof(*rt
), GFP_KERNEL
);
1747 rc
= next_entry(buf
, fp
, (sizeof(u32
) * 2));
1751 rt
->source_type
= le32_to_cpu(buf
[0]);
1752 rt
->target_type
= le32_to_cpu(buf
[1]);
1753 if (p
->policyvers
>= POLICYDB_VERSION_RANGETRANS
) {
1754 rc
= next_entry(buf
, fp
, sizeof(u32
));
1757 rt
->target_class
= le32_to_cpu(buf
[0]);
1759 rt
->target_class
= p
->process_class
;
1762 if (!policydb_type_isvalid(p
, rt
->source_type
) ||
1763 !policydb_type_isvalid(p
, rt
->target_type
) ||
1764 !policydb_class_isvalid(p
, rt
->target_class
))
1768 r
= kzalloc(sizeof(*r
), GFP_KERNEL
);
1772 rc
= mls_read_range_helper(r
, fp
);
1777 if (!mls_range_isvalid(p
, r
)) {
1778 printk(KERN_WARNING
"SELinux: rangetrans: invalid range\n");
1782 rc
= hashtab_insert(p
->range_tr
, rt
, r
);
1789 rangetr_hash_eval(p
->range_tr
);
1797 static int genfs_read(struct policydb
*p
, void *fp
)
1800 u32 nel
, nel2
, len
, len2
;
1802 struct ocontext
*l
, *c
;
1803 struct ocontext
*newc
= NULL
;
1804 struct genfs
*genfs_p
, *genfs
;
1805 struct genfs
*newgenfs
= NULL
;
1807 rc
= next_entry(buf
, fp
, sizeof(u32
));
1810 nel
= le32_to_cpu(buf
[0]);
1812 for (i
= 0; i
< nel
; i
++) {
1813 rc
= next_entry(buf
, fp
, sizeof(u32
));
1816 len
= le32_to_cpu(buf
[0]);
1819 newgenfs
= kzalloc(sizeof(*newgenfs
), GFP_KERNEL
);
1824 newgenfs
->fstype
= kmalloc(len
+ 1, GFP_KERNEL
);
1825 if (!newgenfs
->fstype
)
1828 rc
= next_entry(newgenfs
->fstype
, fp
, len
);
1832 newgenfs
->fstype
[len
] = 0;
1834 for (genfs_p
= NULL
, genfs
= p
->genfs
; genfs
;
1835 genfs_p
= genfs
, genfs
= genfs
->next
) {
1837 if (strcmp(newgenfs
->fstype
, genfs
->fstype
) == 0) {
1838 printk(KERN_ERR
"SELinux: dup genfs fstype %s\n",
1842 if (strcmp(newgenfs
->fstype
, genfs
->fstype
) < 0)
1845 newgenfs
->next
= genfs
;
1847 genfs_p
->next
= newgenfs
;
1849 p
->genfs
= newgenfs
;
1853 rc
= next_entry(buf
, fp
, sizeof(u32
));
1857 nel2
= le32_to_cpu(buf
[0]);
1858 for (j
= 0; j
< nel2
; j
++) {
1859 rc
= next_entry(buf
, fp
, sizeof(u32
));
1862 len
= le32_to_cpu(buf
[0]);
1865 newc
= kzalloc(sizeof(*newc
), GFP_KERNEL
);
1870 newc
->u
.name
= kmalloc(len
+ 1, GFP_KERNEL
);
1874 rc
= next_entry(newc
->u
.name
, fp
, len
);
1877 newc
->u
.name
[len
] = 0;
1879 rc
= next_entry(buf
, fp
, sizeof(u32
));
1883 newc
->v
.sclass
= le32_to_cpu(buf
[0]);
1884 rc
= context_read_and_validate(&newc
->context
[0], p
, fp
);
1888 for (l
= NULL
, c
= genfs
->head
; c
;
1889 l
= c
, c
= c
->next
) {
1891 if (!strcmp(newc
->u
.name
, c
->u
.name
) &&
1892 (!c
->v
.sclass
|| !newc
->v
.sclass
||
1893 newc
->v
.sclass
== c
->v
.sclass
)) {
1894 printk(KERN_ERR
"SELinux: dup genfs entry (%s,%s)\n",
1895 genfs
->fstype
, c
->u
.name
);
1898 len
= strlen(newc
->u
.name
);
1899 len2
= strlen(c
->u
.name
);
1915 kfree(newgenfs
->fstype
);
1917 ocontext_destroy(newc
, OCON_FSUSE
);
1922 static int ocontext_read(struct policydb
*p
, struct policydb_compat_info
*info
,
1928 struct ocontext
*l
, *c
;
1931 for (i
= 0; i
< info
->ocon_num
; i
++) {
1932 rc
= next_entry(buf
, fp
, sizeof(u32
));
1935 nel
= le32_to_cpu(buf
[0]);
1938 for (j
= 0; j
< nel
; j
++) {
1940 c
= kzalloc(sizeof(*c
), GFP_KERNEL
);
1946 p
->ocontexts
[i
] = c
;
1951 rc
= next_entry(buf
, fp
, sizeof(u32
));
1955 c
->sid
[0] = le32_to_cpu(buf
[0]);
1956 rc
= context_read_and_validate(&c
->context
[0], p
, fp
);
1962 rc
= next_entry(buf
, fp
, sizeof(u32
));
1965 len
= le32_to_cpu(buf
[0]);
1968 c
->u
.name
= kmalloc(len
+ 1, GFP_KERNEL
);
1972 rc
= next_entry(c
->u
.name
, fp
, len
);
1977 rc
= context_read_and_validate(&c
->context
[0], p
, fp
);
1980 rc
= context_read_and_validate(&c
->context
[1], p
, fp
);
1985 rc
= next_entry(buf
, fp
, sizeof(u32
)*3);
1988 c
->u
.port
.protocol
= le32_to_cpu(buf
[0]);
1989 c
->u
.port
.low_port
= le32_to_cpu(buf
[1]);
1990 c
->u
.port
.high_port
= le32_to_cpu(buf
[2]);
1991 rc
= context_read_and_validate(&c
->context
[0], p
, fp
);
1996 rc
= next_entry(nodebuf
, fp
, sizeof(u32
) * 2);
1999 c
->u
.node
.addr
= nodebuf
[0]; /* network order */
2000 c
->u
.node
.mask
= nodebuf
[1]; /* network order */
2001 rc
= context_read_and_validate(&c
->context
[0], p
, fp
);
2006 rc
= next_entry(buf
, fp
, sizeof(u32
)*2);
2011 c
->v
.behavior
= le32_to_cpu(buf
[0]);
2012 if (c
->v
.behavior
> SECURITY_FS_USE_NONE
)
2016 len
= le32_to_cpu(buf
[1]);
2017 c
->u
.name
= kmalloc(len
+ 1, GFP_KERNEL
);
2021 rc
= next_entry(c
->u
.name
, fp
, len
);
2025 rc
= context_read_and_validate(&c
->context
[0], p
, fp
);
2032 rc
= next_entry(nodebuf
, fp
, sizeof(u32
) * 8);
2035 for (k
= 0; k
< 4; k
++)
2036 c
->u
.node6
.addr
[k
] = nodebuf
[k
];
2037 for (k
= 0; k
< 4; k
++)
2038 c
->u
.node6
.mask
[k
] = nodebuf
[k
+4];
2039 rc
= context_read_and_validate(&c
->context
[0], p
, fp
);
2053 * Read the configuration data from a policy database binary
2054 * representation file into a policy database structure.
2056 int policydb_read(struct policydb
*p
, void *fp
)
2058 struct role_allow
*ra
, *lra
;
2059 struct role_trans
*tr
, *ltr
;
2062 u32 len
, nprim
, nel
;
2065 struct policydb_compat_info
*info
;
2067 rc
= policydb_init(p
);
2071 /* Read the magic number and string length. */
2072 rc
= next_entry(buf
, fp
, sizeof(u32
) * 2);
2076 if (le32_to_cpu(buf
[0]) != POLICYDB_MAGIC
) {
2077 printk(KERN_ERR
"SELinux: policydb magic number 0x%x does "
2078 "not match expected magic number 0x%x\n",
2079 le32_to_cpu(buf
[0]), POLICYDB_MAGIC
);
2083 len
= le32_to_cpu(buf
[1]);
2084 if (len
!= strlen(POLICYDB_STRING
)) {
2085 printk(KERN_ERR
"SELinux: policydb string length %d does not "
2086 "match expected length %Zu\n",
2087 len
, strlen(POLICYDB_STRING
));
2090 policydb_str
= kmalloc(len
+ 1, GFP_KERNEL
);
2091 if (!policydb_str
) {
2092 printk(KERN_ERR
"SELinux: unable to allocate memory for policydb "
2093 "string of length %d\n", len
);
2097 rc
= next_entry(policydb_str
, fp
, len
);
2099 printk(KERN_ERR
"SELinux: truncated policydb string identifier\n");
2100 kfree(policydb_str
);
2103 policydb_str
[len
] = '\0';
2104 if (strcmp(policydb_str
, POLICYDB_STRING
)) {
2105 printk(KERN_ERR
"SELinux: policydb string %s does not match "
2106 "my string %s\n", policydb_str
, POLICYDB_STRING
);
2107 kfree(policydb_str
);
2110 /* Done with policydb_str. */
2111 kfree(policydb_str
);
2112 policydb_str
= NULL
;
2114 /* Read the version and table sizes. */
2115 rc
= next_entry(buf
, fp
, sizeof(u32
)*4);
2119 p
->policyvers
= le32_to_cpu(buf
[0]);
2120 if (p
->policyvers
< POLICYDB_VERSION_MIN
||
2121 p
->policyvers
> POLICYDB_VERSION_MAX
) {
2122 printk(KERN_ERR
"SELinux: policydb version %d does not match "
2123 "my version range %d-%d\n",
2124 le32_to_cpu(buf
[0]), POLICYDB_VERSION_MIN
, POLICYDB_VERSION_MAX
);
2128 if ((le32_to_cpu(buf
[1]) & POLICYDB_CONFIG_MLS
)) {
2131 if (p
->policyvers
< POLICYDB_VERSION_MLS
) {
2132 printk(KERN_ERR
"SELinux: security policydb version %d "
2133 "(MLS) not backwards compatible\n",
2138 p
->reject_unknown
= !!(le32_to_cpu(buf
[1]) & REJECT_UNKNOWN
);
2139 p
->allow_unknown
= !!(le32_to_cpu(buf
[1]) & ALLOW_UNKNOWN
);
2141 if (p
->policyvers
>= POLICYDB_VERSION_POLCAP
&&
2142 ebitmap_read(&p
->policycaps
, fp
) != 0)
2145 if (p
->policyvers
>= POLICYDB_VERSION_PERMISSIVE
&&
2146 ebitmap_read(&p
->permissive_map
, fp
) != 0)
2149 info
= policydb_lookup_compat(p
->policyvers
);
2151 printk(KERN_ERR
"SELinux: unable to find policy compat info "
2152 "for version %d\n", p
->policyvers
);
2156 if (le32_to_cpu(buf
[2]) != info
->sym_num
||
2157 le32_to_cpu(buf
[3]) != info
->ocon_num
) {
2158 printk(KERN_ERR
"SELinux: policydb table sizes (%d,%d) do "
2159 "not match mine (%d,%d)\n", le32_to_cpu(buf
[2]),
2160 le32_to_cpu(buf
[3]),
2161 info
->sym_num
, info
->ocon_num
);
2165 for (i
= 0; i
< info
->sym_num
; i
++) {
2166 rc
= next_entry(buf
, fp
, sizeof(u32
)*2);
2169 nprim
= le32_to_cpu(buf
[0]);
2170 nel
= le32_to_cpu(buf
[1]);
2171 for (j
= 0; j
< nel
; j
++) {
2172 rc
= read_f
[i
](p
, p
->symtab
[i
].table
, fp
);
2177 p
->symtab
[i
].nprim
= nprim
;
2180 rc
= avtab_read(&p
->te_avtab
, fp
, p
);
2184 if (p
->policyvers
>= POLICYDB_VERSION_BOOL
) {
2185 rc
= cond_read_list(p
, fp
);
2190 rc
= next_entry(buf
, fp
, sizeof(u32
));
2193 nel
= le32_to_cpu(buf
[0]);
2195 for (i
= 0; i
< nel
; i
++) {
2196 tr
= kzalloc(sizeof(*tr
), GFP_KERNEL
);
2205 rc
= next_entry(buf
, fp
, sizeof(u32
)*3);
2208 tr
->role
= le32_to_cpu(buf
[0]);
2209 tr
->type
= le32_to_cpu(buf
[1]);
2210 tr
->new_role
= le32_to_cpu(buf
[2]);
2211 if (!policydb_role_isvalid(p
, tr
->role
) ||
2212 !policydb_type_isvalid(p
, tr
->type
) ||
2213 !policydb_role_isvalid(p
, tr
->new_role
)) {
2220 rc
= next_entry(buf
, fp
, sizeof(u32
));
2223 nel
= le32_to_cpu(buf
[0]);
2225 for (i
= 0; i
< nel
; i
++) {
2226 ra
= kzalloc(sizeof(*ra
), GFP_KERNEL
);
2235 rc
= next_entry(buf
, fp
, sizeof(u32
)*2);
2238 ra
->role
= le32_to_cpu(buf
[0]);
2239 ra
->new_role
= le32_to_cpu(buf
[1]);
2240 if (!policydb_role_isvalid(p
, ra
->role
) ||
2241 !policydb_role_isvalid(p
, ra
->new_role
)) {
2248 rc
= policydb_index_classes(p
);
2252 rc
= policydb_index_others(p
);
2256 p
->process_class
= string_to_security_class(p
, "process");
2257 if (!p
->process_class
)
2259 p
->process_trans_perms
= string_to_av_perm(p
, p
->process_class
,
2261 p
->process_trans_perms
|= string_to_av_perm(p
, p
->process_class
,
2263 if (!p
->process_trans_perms
)
2266 rc
= ocontext_read(p
, info
, fp
);
2270 rc
= genfs_read(p
, fp
);
2274 rc
= range_read(p
, fp
);
2279 p
->type_attr_map_array
= flex_array_alloc(sizeof(struct ebitmap
),
2281 GFP_KERNEL
| __GFP_ZERO
);
2282 if (!p
->type_attr_map_array
)
2285 /* preallocate so we don't have to worry about the put ever failing */
2286 rc
= flex_array_prealloc(p
->type_attr_map_array
, 0, p
->p_types
.nprim
- 1,
2287 GFP_KERNEL
| __GFP_ZERO
);
2291 for (i
= 0; i
< p
->p_types
.nprim
; i
++) {
2292 struct ebitmap
*e
= flex_array_get(p
->type_attr_map_array
, i
);
2296 if (p
->policyvers
>= POLICYDB_VERSION_AVTAB
) {
2297 rc
= ebitmap_read(e
, fp
);
2301 /* add the type itself as the degenerate case */
2302 rc
= ebitmap_set_bit(e
, i
, 1);
2307 rc
= policydb_bounds_sanity_check(p
);
2317 policydb_destroy(p
);
2322 * Write a MLS level structure to a policydb binary
2323 * representation file.
2325 static int mls_write_level(struct mls_level
*l
, void *fp
)
2330 buf
[0] = cpu_to_le32(l
->sens
);
2331 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2335 rc
= ebitmap_write(&l
->cat
, fp
);
2343 * Write a MLS range structure to a policydb binary
2344 * representation file.
2346 static int mls_write_range_helper(struct mls_range
*r
, void *fp
)
2352 eq
= mls_level_eq(&r
->level
[1], &r
->level
[0]);
2358 buf
[0] = cpu_to_le32(items
-1);
2359 buf
[1] = cpu_to_le32(r
->level
[0].sens
);
2361 buf
[2] = cpu_to_le32(r
->level
[1].sens
);
2363 BUG_ON(items
> (sizeof(buf
)/sizeof(buf
[0])));
2365 rc
= put_entry(buf
, sizeof(u32
), items
, fp
);
2369 rc
= ebitmap_write(&r
->level
[0].cat
, fp
);
2373 rc
= ebitmap_write(&r
->level
[1].cat
, fp
);
2381 static int sens_write(void *vkey
, void *datum
, void *ptr
)
2384 struct level_datum
*levdatum
= datum
;
2385 struct policy_data
*pd
= ptr
;
2392 buf
[0] = cpu_to_le32(len
);
2393 buf
[1] = cpu_to_le32(levdatum
->isalias
);
2394 rc
= put_entry(buf
, sizeof(u32
), 2, fp
);
2398 rc
= put_entry(key
, 1, len
, fp
);
2402 rc
= mls_write_level(levdatum
->level
, fp
);
2409 static int cat_write(void *vkey
, void *datum
, void *ptr
)
2412 struct cat_datum
*catdatum
= datum
;
2413 struct policy_data
*pd
= ptr
;
2420 buf
[0] = cpu_to_le32(len
);
2421 buf
[1] = cpu_to_le32(catdatum
->value
);
2422 buf
[2] = cpu_to_le32(catdatum
->isalias
);
2423 rc
= put_entry(buf
, sizeof(u32
), 3, fp
);
2427 rc
= put_entry(key
, 1, len
, fp
);
2434 static int role_trans_write(struct role_trans
*r
, void *fp
)
2436 struct role_trans
*tr
;
2442 for (tr
= r
; tr
; tr
= tr
->next
)
2444 buf
[0] = cpu_to_le32(nel
);
2445 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2448 for (tr
= r
; tr
; tr
= tr
->next
) {
2449 buf
[0] = cpu_to_le32(tr
->role
);
2450 buf
[1] = cpu_to_le32(tr
->type
);
2451 buf
[2] = cpu_to_le32(tr
->new_role
);
2452 rc
= put_entry(buf
, sizeof(u32
), 3, fp
);
2460 static int role_allow_write(struct role_allow
*r
, void *fp
)
2462 struct role_allow
*ra
;
2468 for (ra
= r
; ra
; ra
= ra
->next
)
2470 buf
[0] = cpu_to_le32(nel
);
2471 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2474 for (ra
= r
; ra
; ra
= ra
->next
) {
2475 buf
[0] = cpu_to_le32(ra
->role
);
2476 buf
[1] = cpu_to_le32(ra
->new_role
);
2477 rc
= put_entry(buf
, sizeof(u32
), 2, fp
);
2485 * Write a security context structure
2486 * to a policydb binary representation file.
2488 static int context_write(struct policydb
*p
, struct context
*c
,
2494 buf
[0] = cpu_to_le32(c
->user
);
2495 buf
[1] = cpu_to_le32(c
->role
);
2496 buf
[2] = cpu_to_le32(c
->type
);
2498 rc
= put_entry(buf
, sizeof(u32
), 3, fp
);
2502 rc
= mls_write_range_helper(&c
->range
, fp
);
2510 * The following *_write functions are used to
2511 * write the symbol data to a policy database
2512 * binary representation file.
2515 static int perm_write(void *vkey
, void *datum
, void *fp
)
2518 struct perm_datum
*perdatum
= datum
;
2524 buf
[0] = cpu_to_le32(len
);
2525 buf
[1] = cpu_to_le32(perdatum
->value
);
2526 rc
= put_entry(buf
, sizeof(u32
), 2, fp
);
2530 rc
= put_entry(key
, 1, len
, fp
);
2537 static int common_write(void *vkey
, void *datum
, void *ptr
)
2540 struct common_datum
*comdatum
= datum
;
2541 struct policy_data
*pd
= ptr
;
2548 buf
[0] = cpu_to_le32(len
);
2549 buf
[1] = cpu_to_le32(comdatum
->value
);
2550 buf
[2] = cpu_to_le32(comdatum
->permissions
.nprim
);
2551 buf
[3] = cpu_to_le32(comdatum
->permissions
.table
->nel
);
2552 rc
= put_entry(buf
, sizeof(u32
), 4, fp
);
2556 rc
= put_entry(key
, 1, len
, fp
);
2560 rc
= hashtab_map(comdatum
->permissions
.table
, perm_write
, fp
);
2567 static int write_cons_helper(struct policydb
*p
, struct constraint_node
*node
,
2570 struct constraint_node
*c
;
2571 struct constraint_expr
*e
;
2576 for (c
= node
; c
; c
= c
->next
) {
2578 for (e
= c
->expr
; e
; e
= e
->next
)
2580 buf
[0] = cpu_to_le32(c
->permissions
);
2581 buf
[1] = cpu_to_le32(nel
);
2582 rc
= put_entry(buf
, sizeof(u32
), 2, fp
);
2585 for (e
= c
->expr
; e
; e
= e
->next
) {
2586 buf
[0] = cpu_to_le32(e
->expr_type
);
2587 buf
[1] = cpu_to_le32(e
->attr
);
2588 buf
[2] = cpu_to_le32(e
->op
);
2589 rc
= put_entry(buf
, sizeof(u32
), 3, fp
);
2593 switch (e
->expr_type
) {
2595 rc
= ebitmap_write(&e
->names
, fp
);
2608 static int class_write(void *vkey
, void *datum
, void *ptr
)
2611 struct class_datum
*cladatum
= datum
;
2612 struct policy_data
*pd
= ptr
;
2614 struct policydb
*p
= pd
->p
;
2615 struct constraint_node
*c
;
2622 if (cladatum
->comkey
)
2623 len2
= strlen(cladatum
->comkey
);
2628 for (c
= cladatum
->constraints
; c
; c
= c
->next
)
2631 buf
[0] = cpu_to_le32(len
);
2632 buf
[1] = cpu_to_le32(len2
);
2633 buf
[2] = cpu_to_le32(cladatum
->value
);
2634 buf
[3] = cpu_to_le32(cladatum
->permissions
.nprim
);
2635 if (cladatum
->permissions
.table
)
2636 buf
[4] = cpu_to_le32(cladatum
->permissions
.table
->nel
);
2639 buf
[5] = cpu_to_le32(ncons
);
2640 rc
= put_entry(buf
, sizeof(u32
), 6, fp
);
2644 rc
= put_entry(key
, 1, len
, fp
);
2648 if (cladatum
->comkey
) {
2649 rc
= put_entry(cladatum
->comkey
, 1, len2
, fp
);
2654 rc
= hashtab_map(cladatum
->permissions
.table
, perm_write
, fp
);
2658 rc
= write_cons_helper(p
, cladatum
->constraints
, fp
);
2662 /* write out the validatetrans rule */
2664 for (c
= cladatum
->validatetrans
; c
; c
= c
->next
)
2667 buf
[0] = cpu_to_le32(ncons
);
2668 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2672 rc
= write_cons_helper(p
, cladatum
->validatetrans
, fp
);
2679 static int role_write(void *vkey
, void *datum
, void *ptr
)
2682 struct role_datum
*role
= datum
;
2683 struct policy_data
*pd
= ptr
;
2685 struct policydb
*p
= pd
->p
;
2692 buf
[items
++] = cpu_to_le32(len
);
2693 buf
[items
++] = cpu_to_le32(role
->value
);
2694 if (p
->policyvers
>= POLICYDB_VERSION_BOUNDARY
)
2695 buf
[items
++] = cpu_to_le32(role
->bounds
);
2697 BUG_ON(items
> (sizeof(buf
)/sizeof(buf
[0])));
2699 rc
= put_entry(buf
, sizeof(u32
), items
, fp
);
2703 rc
= put_entry(key
, 1, len
, fp
);
2707 rc
= ebitmap_write(&role
->dominates
, fp
);
2711 rc
= ebitmap_write(&role
->types
, fp
);
2718 static int type_write(void *vkey
, void *datum
, void *ptr
)
2721 struct type_datum
*typdatum
= datum
;
2722 struct policy_data
*pd
= ptr
;
2723 struct policydb
*p
= pd
->p
;
2731 buf
[items
++] = cpu_to_le32(len
);
2732 buf
[items
++] = cpu_to_le32(typdatum
->value
);
2733 if (p
->policyvers
>= POLICYDB_VERSION_BOUNDARY
) {
2736 if (typdatum
->primary
)
2737 properties
|= TYPEDATUM_PROPERTY_PRIMARY
;
2739 if (typdatum
->attribute
)
2740 properties
|= TYPEDATUM_PROPERTY_ATTRIBUTE
;
2742 buf
[items
++] = cpu_to_le32(properties
);
2743 buf
[items
++] = cpu_to_le32(typdatum
->bounds
);
2745 buf
[items
++] = cpu_to_le32(typdatum
->primary
);
2747 BUG_ON(items
> (sizeof(buf
) / sizeof(buf
[0])));
2748 rc
= put_entry(buf
, sizeof(u32
), items
, fp
);
2752 rc
= put_entry(key
, 1, len
, fp
);
2759 static int user_write(void *vkey
, void *datum
, void *ptr
)
2762 struct user_datum
*usrdatum
= datum
;
2763 struct policy_data
*pd
= ptr
;
2764 struct policydb
*p
= pd
->p
;
2772 buf
[items
++] = cpu_to_le32(len
);
2773 buf
[items
++] = cpu_to_le32(usrdatum
->value
);
2774 if (p
->policyvers
>= POLICYDB_VERSION_BOUNDARY
)
2775 buf
[items
++] = cpu_to_le32(usrdatum
->bounds
);
2776 BUG_ON(items
> (sizeof(buf
) / sizeof(buf
[0])));
2777 rc
= put_entry(buf
, sizeof(u32
), items
, fp
);
2781 rc
= put_entry(key
, 1, len
, fp
);
2785 rc
= ebitmap_write(&usrdatum
->roles
, fp
);
2789 rc
= mls_write_range_helper(&usrdatum
->range
, fp
);
2793 rc
= mls_write_level(&usrdatum
->dfltlevel
, fp
);
2800 static int (*write_f
[SYM_NUM
]) (void *key
, void *datum
,
2813 static int ocontext_write(struct policydb
*p
, struct policydb_compat_info
*info
,
2816 unsigned int i
, j
, rc
;
2821 for (i
= 0; i
< info
->ocon_num
; i
++) {
2823 for (c
= p
->ocontexts
[i
]; c
; c
= c
->next
)
2825 buf
[0] = cpu_to_le32(nel
);
2826 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2829 for (c
= p
->ocontexts
[i
]; c
; c
= c
->next
) {
2832 buf
[0] = cpu_to_le32(c
->sid
[0]);
2833 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2836 rc
= context_write(p
, &c
->context
[0], fp
);
2842 len
= strlen(c
->u
.name
);
2843 buf
[0] = cpu_to_le32(len
);
2844 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2847 rc
= put_entry(c
->u
.name
, 1, len
, fp
);
2850 rc
= context_write(p
, &c
->context
[0], fp
);
2853 rc
= context_write(p
, &c
->context
[1], fp
);
2858 buf
[0] = cpu_to_le32(c
->u
.port
.protocol
);
2859 buf
[1] = cpu_to_le32(c
->u
.port
.low_port
);
2860 buf
[2] = cpu_to_le32(c
->u
.port
.high_port
);
2861 rc
= put_entry(buf
, sizeof(u32
), 3, fp
);
2864 rc
= context_write(p
, &c
->context
[0], fp
);
2869 nodebuf
[0] = c
->u
.node
.addr
; /* network order */
2870 nodebuf
[1] = c
->u
.node
.mask
; /* network order */
2871 rc
= put_entry(nodebuf
, sizeof(u32
), 2, fp
);
2874 rc
= context_write(p
, &c
->context
[0], fp
);
2879 buf
[0] = cpu_to_le32(c
->v
.behavior
);
2880 len
= strlen(c
->u
.name
);
2881 buf
[1] = cpu_to_le32(len
);
2882 rc
= put_entry(buf
, sizeof(u32
), 2, fp
);
2885 rc
= put_entry(c
->u
.name
, 1, len
, fp
);
2888 rc
= context_write(p
, &c
->context
[0], fp
);
2893 for (j
= 0; j
< 4; j
++)
2894 nodebuf
[j
] = c
->u
.node6
.addr
[j
]; /* network order */
2895 for (j
= 0; j
< 4; j
++)
2896 nodebuf
[j
+ 4] = c
->u
.node6
.mask
[j
]; /* network order */
2897 rc
= put_entry(nodebuf
, sizeof(u32
), 8, fp
);
2900 rc
= context_write(p
, &c
->context
[0], fp
);
2910 static int genfs_write(struct policydb
*p
, void *fp
)
2912 struct genfs
*genfs
;
2919 for (genfs
= p
->genfs
; genfs
; genfs
= genfs
->next
)
2921 buf
[0] = cpu_to_le32(len
);
2922 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2925 for (genfs
= p
->genfs
; genfs
; genfs
= genfs
->next
) {
2926 len
= strlen(genfs
->fstype
);
2927 buf
[0] = cpu_to_le32(len
);
2928 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2931 rc
= put_entry(genfs
->fstype
, 1, len
, fp
);
2935 for (c
= genfs
->head
; c
; c
= c
->next
)
2937 buf
[0] = cpu_to_le32(len
);
2938 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2941 for (c
= genfs
->head
; c
; c
= c
->next
) {
2942 len
= strlen(c
->u
.name
);
2943 buf
[0] = cpu_to_le32(len
);
2944 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2947 rc
= put_entry(c
->u
.name
, 1, len
, fp
);
2950 buf
[0] = cpu_to_le32(c
->v
.sclass
);
2951 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2954 rc
= context_write(p
, &c
->context
[0], fp
);
2962 static int range_count(void *key
, void *data
, void *ptr
)
2970 static int range_write_helper(void *key
, void *data
, void *ptr
)
2973 struct range_trans
*rt
= key
;
2974 struct mls_range
*r
= data
;
2975 struct policy_data
*pd
= ptr
;
2977 struct policydb
*p
= pd
->p
;
2980 buf
[0] = cpu_to_le32(rt
->source_type
);
2981 buf
[1] = cpu_to_le32(rt
->target_type
);
2982 rc
= put_entry(buf
, sizeof(u32
), 2, fp
);
2985 if (p
->policyvers
>= POLICYDB_VERSION_RANGETRANS
) {
2986 buf
[0] = cpu_to_le32(rt
->target_class
);
2987 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
2991 rc
= mls_write_range_helper(r
, fp
);
2998 static int range_write(struct policydb
*p
, void *fp
)
3003 struct policy_data pd
;
3008 /* count the number of entries in the hashtab */
3010 rc
= hashtab_map(p
->range_tr
, range_count
, &nel
);
3014 buf
[0] = cpu_to_le32(nel
);
3015 rc
= put_entry(buf
, sizeof(u32
), 1, fp
);
3019 /* actually write all of the entries */
3020 rc
= hashtab_map(p
->range_tr
, range_write_helper
, &pd
);
3028 * Write the configuration data in a policy database
3029 * structure to a policy database binary representation
3032 int policydb_write(struct policydb
*p
, void *fp
)
3034 unsigned int i
, num_syms
;
3039 struct policydb_compat_info
*info
;
3042 * refuse to write policy older than compressed avtab
3043 * to simplify the writer. There are other tests dropped
3044 * since we assume this throughout the writer code. Be
3045 * careful if you ever try to remove this restriction
3047 if (p
->policyvers
< POLICYDB_VERSION_AVTAB
) {
3048 printk(KERN_ERR
"SELinux: refusing to write policy version %d."
3049 " Because it is less than version %d\n", p
->policyvers
,
3050 POLICYDB_VERSION_AVTAB
);
3056 config
|= POLICYDB_CONFIG_MLS
;
3058 if (p
->reject_unknown
)
3059 config
|= REJECT_UNKNOWN
;
3060 if (p
->allow_unknown
)
3061 config
|= ALLOW_UNKNOWN
;
3063 /* Write the magic number and string identifiers. */
3064 buf
[0] = cpu_to_le32(POLICYDB_MAGIC
);
3065 len
= strlen(POLICYDB_STRING
);
3066 buf
[1] = cpu_to_le32(len
);
3067 rc
= put_entry(buf
, sizeof(u32
), 2, fp
);
3070 rc
= put_entry(POLICYDB_STRING
, 1, len
, fp
);
3074 /* Write the version, config, and table sizes. */
3075 info
= policydb_lookup_compat(p
->policyvers
);
3077 printk(KERN_ERR
"SELinux: compatibility lookup failed for policy "
3078 "version %d", p
->policyvers
);
3082 buf
[0] = cpu_to_le32(p
->policyvers
);
3083 buf
[1] = cpu_to_le32(config
);
3084 buf
[2] = cpu_to_le32(info
->sym_num
);
3085 buf
[3] = cpu_to_le32(info
->ocon_num
);
3087 rc
= put_entry(buf
, sizeof(u32
), 4, fp
);
3091 if (p
->policyvers
>= POLICYDB_VERSION_POLCAP
) {
3092 rc
= ebitmap_write(&p
->policycaps
, fp
);
3097 if (p
->policyvers
>= POLICYDB_VERSION_PERMISSIVE
) {
3098 rc
= ebitmap_write(&p
->permissive_map
, fp
);
3103 num_syms
= info
->sym_num
;
3104 for (i
= 0; i
< num_syms
; i
++) {
3105 struct policy_data pd
;
3110 buf
[0] = cpu_to_le32(p
->symtab
[i
].nprim
);
3111 buf
[1] = cpu_to_le32(p
->symtab
[i
].table
->nel
);
3113 rc
= put_entry(buf
, sizeof(u32
), 2, fp
);
3116 rc
= hashtab_map(p
->symtab
[i
].table
, write_f
[i
], &pd
);
3121 rc
= avtab_write(p
, &p
->te_avtab
, fp
);
3125 rc
= cond_write_list(p
, p
->cond_list
, fp
);
3129 rc
= role_trans_write(p
->role_tr
, fp
);
3133 rc
= role_allow_write(p
->role_allow
, fp
);
3137 rc
= ocontext_write(p
, info
, fp
);
3141 rc
= genfs_write(p
, fp
);
3145 rc
= range_write(p
, fp
);
3149 for (i
= 0; i
< p
->p_types
.nprim
; i
++) {
3150 struct ebitmap
*e
= flex_array_get(p
->type_attr_map_array
, i
);
3153 rc
= ebitmap_write(e
, fp
);