2 * security/tomoyo/common.c
4 * Common functions for TOMOYO.
6 * Copyright (C) 2005-2010 NTT DATA CORPORATION
9 #include <linux/uaccess.h>
10 #include <linux/slab.h>
11 #include <linux/security.h>
14 /* String table for operation mode. */
15 const char * const tomoyo_mode
[TOMOYO_CONFIG_MAX_MODE
] = {
16 [TOMOYO_CONFIG_DISABLED
] = "disabled",
17 [TOMOYO_CONFIG_LEARNING
] = "learning",
18 [TOMOYO_CONFIG_PERMISSIVE
] = "permissive",
19 [TOMOYO_CONFIG_ENFORCING
] = "enforcing"
22 /* String table for /sys/kernel/security/tomoyo/profile */
23 const char * const tomoyo_mac_keywords
[TOMOYO_MAX_MAC_INDEX
24 + TOMOYO_MAX_MAC_CATEGORY_INDEX
] = {
25 [TOMOYO_MAC_FILE_EXECUTE
] = "execute",
26 [TOMOYO_MAC_FILE_OPEN
] = "open",
27 [TOMOYO_MAC_FILE_CREATE
] = "create",
28 [TOMOYO_MAC_FILE_UNLINK
] = "unlink",
29 [TOMOYO_MAC_FILE_GETATTR
] = "getattr",
30 [TOMOYO_MAC_FILE_MKDIR
] = "mkdir",
31 [TOMOYO_MAC_FILE_RMDIR
] = "rmdir",
32 [TOMOYO_MAC_FILE_MKFIFO
] = "mkfifo",
33 [TOMOYO_MAC_FILE_MKSOCK
] = "mksock",
34 [TOMOYO_MAC_FILE_TRUNCATE
] = "truncate",
35 [TOMOYO_MAC_FILE_SYMLINK
] = "symlink",
36 [TOMOYO_MAC_FILE_MKBLOCK
] = "mkblock",
37 [TOMOYO_MAC_FILE_MKCHAR
] = "mkchar",
38 [TOMOYO_MAC_FILE_LINK
] = "link",
39 [TOMOYO_MAC_FILE_RENAME
] = "rename",
40 [TOMOYO_MAC_FILE_CHMOD
] = "chmod",
41 [TOMOYO_MAC_FILE_CHOWN
] = "chown",
42 [TOMOYO_MAC_FILE_CHGRP
] = "chgrp",
43 [TOMOYO_MAC_FILE_IOCTL
] = "ioctl",
44 [TOMOYO_MAC_FILE_CHROOT
] = "chroot",
45 [TOMOYO_MAC_FILE_MOUNT
] = "mount",
46 [TOMOYO_MAC_FILE_UMOUNT
] = "unmount",
47 [TOMOYO_MAC_FILE_PIVOT_ROOT
] = "pivot_root",
48 [TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAC_CATEGORY_FILE
] = "file",
51 /* String table for conditions. */
52 const char * const tomoyo_condition_keyword
[TOMOYO_MAX_CONDITION_KEYWORD
] = {
53 [TOMOYO_TASK_UID
] = "task.uid",
54 [TOMOYO_TASK_EUID
] = "task.euid",
55 [TOMOYO_TASK_SUID
] = "task.suid",
56 [TOMOYO_TASK_FSUID
] = "task.fsuid",
57 [TOMOYO_TASK_GID
] = "task.gid",
58 [TOMOYO_TASK_EGID
] = "task.egid",
59 [TOMOYO_TASK_SGID
] = "task.sgid",
60 [TOMOYO_TASK_FSGID
] = "task.fsgid",
61 [TOMOYO_TASK_PID
] = "task.pid",
62 [TOMOYO_TASK_PPID
] = "task.ppid",
63 [TOMOYO_TYPE_IS_SOCKET
] = "socket",
64 [TOMOYO_TYPE_IS_SYMLINK
] = "symlink",
65 [TOMOYO_TYPE_IS_FILE
] = "file",
66 [TOMOYO_TYPE_IS_BLOCK_DEV
] = "block",
67 [TOMOYO_TYPE_IS_DIRECTORY
] = "directory",
68 [TOMOYO_TYPE_IS_CHAR_DEV
] = "char",
69 [TOMOYO_TYPE_IS_FIFO
] = "fifo",
70 [TOMOYO_MODE_SETUID
] = "setuid",
71 [TOMOYO_MODE_SETGID
] = "setgid",
72 [TOMOYO_MODE_STICKY
] = "sticky",
73 [TOMOYO_MODE_OWNER_READ
] = "owner_read",
74 [TOMOYO_MODE_OWNER_WRITE
] = "owner_write",
75 [TOMOYO_MODE_OWNER_EXECUTE
] = "owner_execute",
76 [TOMOYO_MODE_GROUP_READ
] = "group_read",
77 [TOMOYO_MODE_GROUP_WRITE
] = "group_write",
78 [TOMOYO_MODE_GROUP_EXECUTE
] = "group_execute",
79 [TOMOYO_MODE_OTHERS_READ
] = "others_read",
80 [TOMOYO_MODE_OTHERS_WRITE
] = "others_write",
81 [TOMOYO_MODE_OTHERS_EXECUTE
] = "others_execute",
82 [TOMOYO_EXEC_REALPATH
] = "exec.realpath",
83 [TOMOYO_SYMLINK_TARGET
] = "symlink.target",
84 [TOMOYO_PATH1_UID
] = "path1.uid",
85 [TOMOYO_PATH1_GID
] = "path1.gid",
86 [TOMOYO_PATH1_INO
] = "path1.ino",
87 [TOMOYO_PATH1_MAJOR
] = "path1.major",
88 [TOMOYO_PATH1_MINOR
] = "path1.minor",
89 [TOMOYO_PATH1_PERM
] = "path1.perm",
90 [TOMOYO_PATH1_TYPE
] = "path1.type",
91 [TOMOYO_PATH1_DEV_MAJOR
] = "path1.dev_major",
92 [TOMOYO_PATH1_DEV_MINOR
] = "path1.dev_minor",
93 [TOMOYO_PATH2_UID
] = "path2.uid",
94 [TOMOYO_PATH2_GID
] = "path2.gid",
95 [TOMOYO_PATH2_INO
] = "path2.ino",
96 [TOMOYO_PATH2_MAJOR
] = "path2.major",
97 [TOMOYO_PATH2_MINOR
] = "path2.minor",
98 [TOMOYO_PATH2_PERM
] = "path2.perm",
99 [TOMOYO_PATH2_TYPE
] = "path2.type",
100 [TOMOYO_PATH2_DEV_MAJOR
] = "path2.dev_major",
101 [TOMOYO_PATH2_DEV_MINOR
] = "path2.dev_minor",
102 [TOMOYO_PATH1_PARENT_UID
] = "path1.parent.uid",
103 [TOMOYO_PATH1_PARENT_GID
] = "path1.parent.gid",
104 [TOMOYO_PATH1_PARENT_INO
] = "path1.parent.ino",
105 [TOMOYO_PATH1_PARENT_PERM
] = "path1.parent.perm",
106 [TOMOYO_PATH2_PARENT_UID
] = "path2.parent.uid",
107 [TOMOYO_PATH2_PARENT_GID
] = "path2.parent.gid",
108 [TOMOYO_PATH2_PARENT_INO
] = "path2.parent.ino",
109 [TOMOYO_PATH2_PARENT_PERM
] = "path2.parent.perm",
112 /* String table for PREFERENCE keyword. */
113 static const char * const tomoyo_pref_keywords
[TOMOYO_MAX_PREF
] = {
114 [TOMOYO_PREF_MAX_AUDIT_LOG
] = "max_audit_log",
115 [TOMOYO_PREF_MAX_LEARNING_ENTRY
] = "max_learning_entry",
118 /* String table for path operation. */
119 const char * const tomoyo_path_keyword
[TOMOYO_MAX_PATH_OPERATION
] = {
120 [TOMOYO_TYPE_EXECUTE
] = "execute",
121 [TOMOYO_TYPE_READ
] = "read",
122 [TOMOYO_TYPE_WRITE
] = "write",
123 [TOMOYO_TYPE_APPEND
] = "append",
124 [TOMOYO_TYPE_UNLINK
] = "unlink",
125 [TOMOYO_TYPE_GETATTR
] = "getattr",
126 [TOMOYO_TYPE_RMDIR
] = "rmdir",
127 [TOMOYO_TYPE_TRUNCATE
] = "truncate",
128 [TOMOYO_TYPE_SYMLINK
] = "symlink",
129 [TOMOYO_TYPE_CHROOT
] = "chroot",
130 [TOMOYO_TYPE_UMOUNT
] = "unmount",
133 /* String table for categories. */
134 static const char * const tomoyo_category_keywords
135 [TOMOYO_MAX_MAC_CATEGORY_INDEX
] = {
136 [TOMOYO_MAC_CATEGORY_FILE
] = "file",
139 /* Permit policy management by non-root user? */
140 static bool tomoyo_manage_by_non_root
;
142 /* Utility functions. */
145 * tomoyo_yesno - Return "yes" or "no".
147 * @value: Bool value.
149 const char *tomoyo_yesno(const unsigned int value
)
151 return value
? "yes" : "no";
155 * tomoyo_addprintf - strncat()-like-snprintf().
157 * @buffer: Buffer to write to. Must be '\0'-terminated.
158 * @len: Size of @buffer.
159 * @fmt: The printf()'s format string, followed by parameters.
163 static void tomoyo_addprintf(char *buffer
, int len
, const char *fmt
, ...)
166 const int pos
= strlen(buffer
);
168 vsnprintf(buffer
+ pos
, len
- pos
- 1, fmt
, args
);
173 * tomoyo_flush - Flush queued string to userspace's buffer.
175 * @head: Pointer to "struct tomoyo_io_buffer".
177 * Returns true if all data was flushed, false otherwise.
179 static bool tomoyo_flush(struct tomoyo_io_buffer
*head
)
181 while (head
->r
.w_pos
) {
182 const char *w
= head
->r
.w
[0];
183 size_t len
= strlen(w
);
185 if (len
> head
->read_user_buf_avail
)
186 len
= head
->read_user_buf_avail
;
189 if (copy_to_user(head
->read_user_buf
, w
, len
))
191 head
->read_user_buf_avail
-= len
;
192 head
->read_user_buf
+= len
;
198 /* Add '\0' for audit logs and query. */
200 if (!head
->read_user_buf_avail
||
201 copy_to_user(head
->read_user_buf
, "", 1))
203 head
->read_user_buf_avail
--;
204 head
->read_user_buf
++;
207 for (len
= 0; len
< head
->r
.w_pos
; len
++)
208 head
->r
.w
[len
] = head
->r
.w
[len
+ 1];
215 * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure.
217 * @head: Pointer to "struct tomoyo_io_buffer".
218 * @string: String to print.
220 * Note that @string has to be kept valid until @head is kfree()d.
221 * This means that char[] allocated on stack memory cannot be passed to
222 * this function. Use tomoyo_io_printf() for char[] allocated on stack memory.
224 static void tomoyo_set_string(struct tomoyo_io_buffer
*head
, const char *string
)
226 if (head
->r
.w_pos
< TOMOYO_MAX_IO_READ_QUEUE
) {
227 head
->r
.w
[head
->r
.w_pos
++] = string
;
234 * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure.
236 * @head: Pointer to "struct tomoyo_io_buffer".
237 * @fmt: The printf()'s format string, followed by parameters.
239 void tomoyo_io_printf(struct tomoyo_io_buffer
*head
, const char *fmt
, ...)
243 size_t pos
= head
->r
.avail
;
244 int size
= head
->readbuf_size
- pos
;
248 len
= vsnprintf(head
->read_buf
+ pos
, size
, fmt
, args
) + 1;
250 if (pos
+ len
>= head
->readbuf_size
) {
254 head
->r
.avail
+= len
;
255 tomoyo_set_string(head
, head
->read_buf
+ pos
);
259 * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure.
261 * @head: Pointer to "struct tomoyo_io_buffer".
265 static void tomoyo_set_space(struct tomoyo_io_buffer
*head
)
267 tomoyo_set_string(head
, " ");
271 * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure.
273 * @head: Pointer to "struct tomoyo_io_buffer".
277 static bool tomoyo_set_lf(struct tomoyo_io_buffer
*head
)
279 tomoyo_set_string(head
, "\n");
280 return !head
->r
.w_pos
;
284 * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure.
286 * @head: Pointer to "struct tomoyo_io_buffer".
290 static void tomoyo_set_slash(struct tomoyo_io_buffer
*head
)
292 tomoyo_set_string(head
, "/");
295 /* List of namespaces. */
296 LIST_HEAD(tomoyo_namespace_list
);
297 /* True if namespace other than tomoyo_kernel_namespace is defined. */
298 static bool tomoyo_namespace_enabled
;
301 * tomoyo_init_policy_namespace - Initialize namespace.
303 * @ns: Pointer to "struct tomoyo_policy_namespace".
307 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace
*ns
)
310 for (idx
= 0; idx
< TOMOYO_MAX_ACL_GROUPS
; idx
++)
311 INIT_LIST_HEAD(&ns
->acl_group
[idx
]);
312 for (idx
= 0; idx
< TOMOYO_MAX_GROUP
; idx
++)
313 INIT_LIST_HEAD(&ns
->group_list
[idx
]);
314 for (idx
= 0; idx
< TOMOYO_MAX_POLICY
; idx
++)
315 INIT_LIST_HEAD(&ns
->policy_list
[idx
]);
316 ns
->profile_version
= 20100903;
317 tomoyo_namespace_enabled
= !list_empty(&tomoyo_namespace_list
);
318 list_add_tail_rcu(&ns
->namespace_list
, &tomoyo_namespace_list
);
322 * tomoyo_print_namespace - Print namespace header.
324 * @head: Pointer to "struct tomoyo_io_buffer".
328 static void tomoyo_print_namespace(struct tomoyo_io_buffer
*head
)
330 if (!tomoyo_namespace_enabled
)
332 tomoyo_set_string(head
,
333 container_of(head
->r
.ns
,
334 struct tomoyo_policy_namespace
,
335 namespace_list
)->name
);
336 tomoyo_set_space(head
);
340 * tomoyo_print_name_union - Print a tomoyo_name_union.
342 * @head: Pointer to "struct tomoyo_io_buffer".
343 * @ptr: Pointer to "struct tomoyo_name_union".
345 static void tomoyo_print_name_union(struct tomoyo_io_buffer
*head
,
346 const struct tomoyo_name_union
*ptr
)
348 tomoyo_set_space(head
);
350 tomoyo_set_string(head
, "@");
351 tomoyo_set_string(head
, ptr
->group
->group_name
->name
);
353 tomoyo_set_string(head
, ptr
->filename
->name
);
358 * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote.
360 * @head: Pointer to "struct tomoyo_io_buffer".
361 * @ptr: Pointer to "struct tomoyo_name_union".
365 static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer
*head
,
366 const struct tomoyo_name_union
*ptr
)
369 tomoyo_set_string(head
, "@");
370 tomoyo_set_string(head
, ptr
->group
->group_name
->name
);
372 tomoyo_set_string(head
, "\"");
373 tomoyo_set_string(head
, ptr
->filename
->name
);
374 tomoyo_set_string(head
, "\"");
379 * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space.
381 * @head: Pointer to "struct tomoyo_io_buffer".
382 * @ptr: Pointer to "struct tomoyo_number_union".
386 static void tomoyo_print_number_union_nospace
387 (struct tomoyo_io_buffer
*head
, const struct tomoyo_number_union
*ptr
)
390 tomoyo_set_string(head
, "@");
391 tomoyo_set_string(head
, ptr
->group
->group_name
->name
);
394 unsigned long min
= ptr
->values
[0];
395 const unsigned long max
= ptr
->values
[1];
396 u8 min_type
= ptr
->value_type
[0];
397 const u8 max_type
= ptr
->value_type
[1];
400 for (i
= 0; i
< 2; i
++) {
402 case TOMOYO_VALUE_TYPE_HEXADECIMAL
:
403 tomoyo_addprintf(buffer
, sizeof(buffer
),
406 case TOMOYO_VALUE_TYPE_OCTAL
:
407 tomoyo_addprintf(buffer
, sizeof(buffer
),
411 tomoyo_addprintf(buffer
, sizeof(buffer
), "%lu",
415 if (min
== max
&& min_type
== max_type
)
417 tomoyo_addprintf(buffer
, sizeof(buffer
), "-");
421 tomoyo_io_printf(head
, "%s", buffer
);
426 * tomoyo_print_number_union - Print a tomoyo_number_union.
428 * @head: Pointer to "struct tomoyo_io_buffer".
429 * @ptr: Pointer to "struct tomoyo_number_union".
433 static void tomoyo_print_number_union(struct tomoyo_io_buffer
*head
,
434 const struct tomoyo_number_union
*ptr
)
436 tomoyo_set_space(head
);
437 tomoyo_print_number_union_nospace(head
, ptr
);
441 * tomoyo_assign_profile - Create a new profile.
443 * @ns: Pointer to "struct tomoyo_policy_namespace".
444 * @profile: Profile number to create.
446 * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
448 static struct tomoyo_profile
*tomoyo_assign_profile
449 (struct tomoyo_policy_namespace
*ns
, const unsigned int profile
)
451 struct tomoyo_profile
*ptr
;
452 struct tomoyo_profile
*entry
;
453 if (profile
>= TOMOYO_MAX_PROFILES
)
455 ptr
= ns
->profile_ptr
[profile
];
458 entry
= kzalloc(sizeof(*entry
), GFP_NOFS
);
459 if (mutex_lock_interruptible(&tomoyo_policy_lock
))
461 ptr
= ns
->profile_ptr
[profile
];
462 if (!ptr
&& tomoyo_memory_ok(entry
)) {
464 ptr
->default_config
= TOMOYO_CONFIG_DISABLED
|
465 TOMOYO_CONFIG_WANT_GRANT_LOG
|
466 TOMOYO_CONFIG_WANT_REJECT_LOG
;
467 memset(ptr
->config
, TOMOYO_CONFIG_USE_DEFAULT
,
468 sizeof(ptr
->config
));
469 ptr
->pref
[TOMOYO_PREF_MAX_AUDIT_LOG
] = 1024;
470 ptr
->pref
[TOMOYO_PREF_MAX_LEARNING_ENTRY
] = 2048;
471 mb(); /* Avoid out-of-order execution. */
472 ns
->profile_ptr
[profile
] = ptr
;
475 mutex_unlock(&tomoyo_policy_lock
);
482 * tomoyo_profile - Find a profile.
484 * @ns: Pointer to "struct tomoyo_policy_namespace".
485 * @profile: Profile number to find.
487 * Returns pointer to "struct tomoyo_profile".
489 struct tomoyo_profile
*tomoyo_profile(const struct tomoyo_policy_namespace
*ns
,
492 static struct tomoyo_profile tomoyo_null_profile
;
493 struct tomoyo_profile
*ptr
= ns
->profile_ptr
[profile
];
495 ptr
= &tomoyo_null_profile
;
500 * tomoyo_find_yesno - Find values for specified keyword.
502 * @string: String to check.
503 * @find: Name of keyword.
505 * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
507 static s8
tomoyo_find_yesno(const char *string
, const char *find
)
509 const char *cp
= strstr(string
, find
);
512 if (!strncmp(cp
, "=yes", 4))
514 else if (!strncmp(cp
, "=no", 3))
521 * tomoyo_set_uint - Set value for specified preference.
523 * @i: Pointer to "unsigned int".
524 * @string: String to check.
525 * @find: Name of keyword.
529 static void tomoyo_set_uint(unsigned int *i
, const char *string
,
532 const char *cp
= strstr(string
, find
);
534 sscanf(cp
+ strlen(find
), "=%u", i
);
538 * tomoyo_set_mode - Set mode for specified profile.
540 * @name: Name of functionality.
541 * @value: Mode for @name.
542 * @profile: Pointer to "struct tomoyo_profile".
544 * Returns 0 on success, negative value otherwise.
546 static int tomoyo_set_mode(char *name
, const char *value
,
547 struct tomoyo_profile
*profile
)
551 if (!strcmp(name
, "CONFIG")) {
552 i
= TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
;
553 config
= profile
->default_config
;
554 } else if (tomoyo_str_starts(&name
, "CONFIG::")) {
556 for (i
= 0; i
< TOMOYO_MAX_MAC_INDEX
557 + TOMOYO_MAX_MAC_CATEGORY_INDEX
; i
++) {
559 if (i
< TOMOYO_MAX_MAC_INDEX
) {
560 const u8 c
= tomoyo_index2category
[i
];
561 const char *category
=
562 tomoyo_category_keywords
[c
];
563 len
= strlen(category
);
564 if (strncmp(name
, category
, len
) ||
565 name
[len
++] != ':' || name
[len
++] != ':')
568 if (strcmp(name
+ len
, tomoyo_mac_keywords
[i
]))
570 config
= profile
->config
[i
];
573 if (i
== TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
)
578 if (strstr(value
, "use_default")) {
579 config
= TOMOYO_CONFIG_USE_DEFAULT
;
582 for (mode
= 0; mode
< 4; mode
++)
583 if (strstr(value
, tomoyo_mode
[mode
]))
585 * Update lower 3 bits in order to distinguish
586 * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
588 config
= (config
& ~7) | mode
;
589 if (config
!= TOMOYO_CONFIG_USE_DEFAULT
) {
590 switch (tomoyo_find_yesno(value
, "grant_log")) {
592 config
|= TOMOYO_CONFIG_WANT_GRANT_LOG
;
595 config
&= ~TOMOYO_CONFIG_WANT_GRANT_LOG
;
598 switch (tomoyo_find_yesno(value
, "reject_log")) {
600 config
|= TOMOYO_CONFIG_WANT_REJECT_LOG
;
603 config
&= ~TOMOYO_CONFIG_WANT_REJECT_LOG
;
608 if (i
< TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
)
609 profile
->config
[i
] = config
;
610 else if (config
!= TOMOYO_CONFIG_USE_DEFAULT
)
611 profile
->default_config
= config
;
616 * tomoyo_write_profile - Write profile table.
618 * @head: Pointer to "struct tomoyo_io_buffer".
620 * Returns 0 on success, negative value otherwise.
622 static int tomoyo_write_profile(struct tomoyo_io_buffer
*head
)
624 char *data
= head
->write_buf
;
627 struct tomoyo_profile
*profile
;
628 if (sscanf(data
, "PROFILE_VERSION=%u", &head
->w
.ns
->profile_version
)
631 i
= simple_strtoul(data
, &cp
, 10);
635 profile
= tomoyo_assign_profile(head
->w
.ns
, i
);
638 cp
= strchr(data
, '=');
642 if (!strcmp(data
, "COMMENT")) {
643 static DEFINE_SPINLOCK(lock
);
644 const struct tomoyo_path_info
*new_comment
645 = tomoyo_get_name(cp
);
646 const struct tomoyo_path_info
*old_comment
;
650 old_comment
= profile
->comment
;
651 profile
->comment
= new_comment
;
653 tomoyo_put_name(old_comment
);
656 if (!strcmp(data
, "PREFERENCE")) {
657 for (i
= 0; i
< TOMOYO_MAX_PREF
; i
++)
658 tomoyo_set_uint(&profile
->pref
[i
], cp
,
659 tomoyo_pref_keywords
[i
]);
662 return tomoyo_set_mode(data
, cp
, profile
);
666 * tomoyo_print_config - Print mode for specified functionality.
668 * @head: Pointer to "struct tomoyo_io_buffer".
669 * @config: Mode for that functionality.
673 * Caller prints functionality's name.
675 static void tomoyo_print_config(struct tomoyo_io_buffer
*head
, const u8 config
)
677 tomoyo_io_printf(head
, "={ mode=%s grant_log=%s reject_log=%s }\n",
678 tomoyo_mode
[config
& 3],
679 tomoyo_yesno(config
& TOMOYO_CONFIG_WANT_GRANT_LOG
),
680 tomoyo_yesno(config
& TOMOYO_CONFIG_WANT_REJECT_LOG
));
684 * tomoyo_read_profile - Read profile table.
686 * @head: Pointer to "struct tomoyo_io_buffer".
690 static void tomoyo_read_profile(struct tomoyo_io_buffer
*head
)
693 struct tomoyo_policy_namespace
*ns
=
694 container_of(head
->r
.ns
, typeof(*ns
), namespace_list
);
695 const struct tomoyo_profile
*profile
;
699 index
= head
->r
.index
;
700 profile
= ns
->profile_ptr
[index
];
701 switch (head
->r
.step
) {
703 tomoyo_print_namespace(head
);
704 tomoyo_io_printf(head
, "PROFILE_VERSION=%u\n",
705 ns
->profile_version
);
709 for ( ; head
->r
.index
< TOMOYO_MAX_PROFILES
;
711 if (ns
->profile_ptr
[head
->r
.index
])
713 if (head
->r
.index
== TOMOYO_MAX_PROFILES
)
720 const struct tomoyo_path_info
*comment
=
722 tomoyo_print_namespace(head
);
723 tomoyo_io_printf(head
, "%u-COMMENT=", index
);
724 tomoyo_set_string(head
, comment
? comment
->name
: "");
726 tomoyo_io_printf(head
, "%u-PREFERENCE={ ", index
);
727 for (i
= 0; i
< TOMOYO_MAX_PREF
; i
++)
728 tomoyo_io_printf(head
, "%s=%u ",
729 tomoyo_pref_keywords
[i
],
731 tomoyo_set_string(head
, "}\n");
737 tomoyo_print_namespace(head
);
738 tomoyo_io_printf(head
, "%u-%s", index
, "CONFIG");
739 tomoyo_print_config(head
, profile
->default_config
);
745 for ( ; head
->r
.bit
< TOMOYO_MAX_MAC_INDEX
746 + TOMOYO_MAX_MAC_CATEGORY_INDEX
; head
->r
.bit
++) {
747 const u8 i
= head
->r
.bit
;
748 const u8 config
= profile
->config
[i
];
749 if (config
== TOMOYO_CONFIG_USE_DEFAULT
)
751 tomoyo_print_namespace(head
);
752 if (i
< TOMOYO_MAX_MAC_INDEX
)
753 tomoyo_io_printf(head
, "%u-CONFIG::%s::%s",
755 tomoyo_category_keywords
756 [tomoyo_index2category
[i
]],
757 tomoyo_mac_keywords
[i
]);
759 tomoyo_io_printf(head
, "%u-CONFIG::%s", index
,
760 tomoyo_mac_keywords
[i
]);
761 tomoyo_print_config(head
, config
);
765 if (head
->r
.bit
== TOMOYO_MAX_MAC_INDEX
766 + TOMOYO_MAX_MAC_CATEGORY_INDEX
) {
772 if (tomoyo_flush(head
))
776 static bool tomoyo_same_manager(const struct tomoyo_acl_head
*a
,
777 const struct tomoyo_acl_head
*b
)
779 return container_of(a
, struct tomoyo_manager
, head
)->manager
==
780 container_of(b
, struct tomoyo_manager
, head
)->manager
;
784 * tomoyo_update_manager_entry - Add a manager entry.
786 * @manager: The path to manager or the domainnamme.
787 * @is_delete: True if it is a delete request.
789 * Returns 0 on success, negative value otherwise.
791 * Caller holds tomoyo_read_lock().
793 static int tomoyo_update_manager_entry(const char *manager
,
794 const bool is_delete
)
796 struct tomoyo_manager e
= { };
797 struct tomoyo_acl_param param
= {
798 /* .ns = &tomoyo_kernel_namespace, */
799 .is_delete
= is_delete
,
800 .list
= &tomoyo_kernel_namespace
.
801 policy_list
[TOMOYO_ID_MANAGER
],
803 int error
= is_delete
? -ENOENT
: -ENOMEM
;
804 if (tomoyo_domain_def(manager
)) {
805 if (!tomoyo_correct_domain(manager
))
809 if (!tomoyo_correct_path(manager
))
812 e
.manager
= tomoyo_get_name(manager
);
814 error
= tomoyo_update_policy(&e
.head
, sizeof(e
), ¶m
,
815 tomoyo_same_manager
);
816 tomoyo_put_name(e
.manager
);
822 * tomoyo_write_manager - Write manager policy.
824 * @head: Pointer to "struct tomoyo_io_buffer".
826 * Returns 0 on success, negative value otherwise.
828 * Caller holds tomoyo_read_lock().
830 static int tomoyo_write_manager(struct tomoyo_io_buffer
*head
)
832 char *data
= head
->write_buf
;
834 if (!strcmp(data
, "manage_by_non_root")) {
835 tomoyo_manage_by_non_root
= !head
->w
.is_delete
;
838 return tomoyo_update_manager_entry(data
, head
->w
.is_delete
);
842 * tomoyo_read_manager - Read manager policy.
844 * @head: Pointer to "struct tomoyo_io_buffer".
846 * Caller holds tomoyo_read_lock().
848 static void tomoyo_read_manager(struct tomoyo_io_buffer
*head
)
852 list_for_each_cookie(head
->r
.acl
, &tomoyo_kernel_namespace
.
853 policy_list
[TOMOYO_ID_MANAGER
]) {
854 struct tomoyo_manager
*ptr
=
855 list_entry(head
->r
.acl
, typeof(*ptr
), head
.list
);
856 if (ptr
->head
.is_deleted
)
858 if (!tomoyo_flush(head
))
860 tomoyo_set_string(head
, ptr
->manager
->name
);
867 * tomoyo_manager - Check whether the current process is a policy manager.
869 * Returns true if the current process is permitted to modify policy
870 * via /sys/kernel/security/tomoyo/ interface.
872 * Caller holds tomoyo_read_lock().
874 static bool tomoyo_manager(void)
876 struct tomoyo_manager
*ptr
;
878 const struct task_struct
*task
= current
;
879 const struct tomoyo_path_info
*domainname
= tomoyo_domain()->domainname
;
882 if (!tomoyo_policy_loaded
)
884 if (!tomoyo_manage_by_non_root
&& (task
->cred
->uid
|| task
->cred
->euid
))
886 list_for_each_entry_rcu(ptr
, &tomoyo_kernel_namespace
.
887 policy_list
[TOMOYO_ID_MANAGER
], head
.list
) {
888 if (!ptr
->head
.is_deleted
&& ptr
->is_domain
889 && !tomoyo_pathcmp(domainname
, ptr
->manager
)) {
896 exe
= tomoyo_get_exe();
899 list_for_each_entry_rcu(ptr
, &tomoyo_kernel_namespace
.
900 policy_list
[TOMOYO_ID_MANAGER
], head
.list
) {
901 if (!ptr
->head
.is_deleted
&& !ptr
->is_domain
902 && !strcmp(exe
, ptr
->manager
->name
)) {
907 if (!found
) { /* Reduce error messages. */
908 static pid_t last_pid
;
909 const pid_t pid
= current
->pid
;
910 if (last_pid
!= pid
) {
911 printk(KERN_WARNING
"%s ( %s ) is not permitted to "
912 "update policies.\n", domainname
->name
, exe
);
921 * tomoyo_select_domain - Parse select command.
923 * @head: Pointer to "struct tomoyo_io_buffer".
924 * @data: String to parse.
926 * Returns true on success, false otherwise.
928 * Caller holds tomoyo_read_lock().
930 static bool tomoyo_select_domain(struct tomoyo_io_buffer
*head
,
934 struct tomoyo_domain_info
*domain
= NULL
;
935 bool global_pid
= false;
936 if (strncmp(data
, "select ", 7))
939 if (sscanf(data
, "pid=%u", &pid
) == 1 ||
940 (global_pid
= true, sscanf(data
, "global-pid=%u", &pid
) == 1)) {
941 struct task_struct
*p
;
943 read_lock(&tasklist_lock
);
945 p
= find_task_by_pid_ns(pid
, &init_pid_ns
);
947 p
= find_task_by_vpid(pid
);
949 domain
= tomoyo_real_domain(p
);
950 read_unlock(&tasklist_lock
);
952 } else if (!strncmp(data
, "domain=", 7)) {
953 if (tomoyo_domain_def(data
+ 7))
954 domain
= tomoyo_find_domain(data
+ 7);
957 head
->w
.domain
= domain
;
958 /* Accessing read_buf is safe because head->io_sem is held. */
960 return true; /* Do nothing if open(O_WRONLY). */
961 memset(&head
->r
, 0, sizeof(head
->r
));
962 head
->r
.print_this_domain_only
= true;
964 head
->r
.domain
= &domain
->list
;
967 tomoyo_io_printf(head
, "# select %s\n", data
);
968 if (domain
&& domain
->is_deleted
)
969 tomoyo_io_printf(head
, "# This is a deleted domain.\n");
974 * tomoyo_delete_domain - Delete a domain.
976 * @domainname: The name of domain.
980 * Caller holds tomoyo_read_lock().
982 static int tomoyo_delete_domain(char *domainname
)
984 struct tomoyo_domain_info
*domain
;
985 struct tomoyo_path_info name
;
987 name
.name
= domainname
;
988 tomoyo_fill_path_info(&name
);
989 if (mutex_lock_interruptible(&tomoyo_policy_lock
))
991 /* Is there an active domain? */
992 list_for_each_entry_rcu(domain
, &tomoyo_domain_list
, list
) {
993 /* Never delete tomoyo_kernel_domain */
994 if (domain
== &tomoyo_kernel_domain
)
996 if (domain
->is_deleted
||
997 tomoyo_pathcmp(domain
->domainname
, &name
))
999 domain
->is_deleted
= true;
1002 mutex_unlock(&tomoyo_policy_lock
);
1007 * tomoyo_write_domain2 - Write domain policy.
1009 * @ns: Pointer to "struct tomoyo_policy_namespace".
1010 * @list: Pointer to "struct list_head".
1011 * @data: Policy to be interpreted.
1012 * @is_delete: True if it is a delete request.
1014 * Returns 0 on success, negative value otherwise.
1016 * Caller holds tomoyo_read_lock().
1018 static int tomoyo_write_domain2(struct tomoyo_policy_namespace
*ns
,
1019 struct list_head
*list
, char *data
,
1020 const bool is_delete
)
1022 struct tomoyo_acl_param param
= {
1026 .is_delete
= is_delete
,
1028 static const struct {
1029 const char *keyword
;
1030 int (*write
) (struct tomoyo_acl_param
*);
1031 } tomoyo_callback
[1] = {
1032 { "file ", tomoyo_write_file
},
1035 for (i
= 0; i
< 1; i
++) {
1036 if (!tomoyo_str_starts(¶m
.data
,
1037 tomoyo_callback
[i
].keyword
))
1039 return tomoyo_callback
[i
].write(¶m
);
1044 /* String table for domain flags. */
1045 const char * const tomoyo_dif
[TOMOYO_MAX_DOMAIN_INFO_FLAGS
] = {
1046 [TOMOYO_DIF_QUOTA_WARNED
] = "quota_exceeded\n",
1047 [TOMOYO_DIF_TRANSITION_FAILED
] = "transition_failed\n",
1051 * tomoyo_write_domain - Write domain policy.
1053 * @head: Pointer to "struct tomoyo_io_buffer".
1055 * Returns 0 on success, negative value otherwise.
1057 * Caller holds tomoyo_read_lock().
1059 static int tomoyo_write_domain(struct tomoyo_io_buffer
*head
)
1061 char *data
= head
->write_buf
;
1062 struct tomoyo_policy_namespace
*ns
;
1063 struct tomoyo_domain_info
*domain
= head
->w
.domain
;
1064 const bool is_delete
= head
->w
.is_delete
;
1065 bool is_select
= !is_delete
&& tomoyo_str_starts(&data
, "select ");
1066 unsigned int profile
;
1070 tomoyo_delete_domain(data
);
1072 domain
= tomoyo_find_domain(data
);
1074 domain
= tomoyo_assign_domain(data
, false);
1075 head
->w
.domain
= domain
;
1081 if (sscanf(data
, "use_profile %u", &profile
) == 1
1082 && profile
< TOMOYO_MAX_PROFILES
) {
1083 if (!tomoyo_policy_loaded
|| ns
->profile_ptr
[profile
])
1084 domain
->profile
= (u8
) profile
;
1087 if (sscanf(data
, "use_group %u\n", &profile
) == 1
1088 && profile
< TOMOYO_MAX_ACL_GROUPS
) {
1090 domain
->group
= (u8
) profile
;
1093 for (profile
= 0; profile
< TOMOYO_MAX_DOMAIN_INFO_FLAGS
; profile
++) {
1094 const char *cp
= tomoyo_dif
[profile
];
1095 if (strncmp(data
, cp
, strlen(cp
) - 1))
1097 domain
->flags
[profile
] = !is_delete
;
1100 return tomoyo_write_domain2(ns
, &domain
->acl_info_list
, data
,
1105 * tomoyo_print_condition - Print condition part.
1107 * @head: Pointer to "struct tomoyo_io_buffer".
1108 * @cond: Pointer to "struct tomoyo_condition".
1110 * Returns true on success, false otherwise.
1112 static bool tomoyo_print_condition(struct tomoyo_io_buffer
*head
,
1113 const struct tomoyo_condition
*cond
)
1115 switch (head
->r
.cond_step
) {
1117 head
->r
.cond_index
= 0;
1118 head
->r
.cond_step
++;
1122 const u16 condc
= cond
->condc
;
1123 const struct tomoyo_condition_element
*condp
=
1124 (typeof(condp
)) (cond
+ 1);
1125 const struct tomoyo_number_union
*numbers_p
=
1126 (typeof(numbers_p
)) (condp
+ condc
);
1127 const struct tomoyo_name_union
*names_p
=
1129 (numbers_p
+ cond
->numbers_count
);
1131 for (skip
= 0; skip
< head
->r
.cond_index
; skip
++) {
1132 const u8 left
= condp
->left
;
1133 const u8 right
= condp
->right
;
1136 case TOMOYO_NUMBER_UNION
:
1141 case TOMOYO_NAME_UNION
:
1144 case TOMOYO_NUMBER_UNION
:
1149 while (head
->r
.cond_index
< condc
) {
1150 const u8 match
= condp
->equals
;
1151 const u8 left
= condp
->left
;
1152 const u8 right
= condp
->right
;
1153 if (!tomoyo_flush(head
))
1156 head
->r
.cond_index
++;
1157 tomoyo_set_space(head
);
1159 case TOMOYO_NUMBER_UNION
:
1160 tomoyo_print_number_union_nospace
1161 (head
, numbers_p
++);
1164 tomoyo_set_string(head
,
1165 tomoyo_condition_keyword
[left
]);
1168 tomoyo_set_string(head
, match
? "=" : "!=");
1170 case TOMOYO_NAME_UNION
:
1171 tomoyo_print_name_union_quoted
1174 case TOMOYO_NUMBER_UNION
:
1175 tomoyo_print_number_union_nospace
1176 (head
, numbers_p
++);
1179 tomoyo_set_string(head
,
1180 tomoyo_condition_keyword
[right
]);
1185 head
->r
.cond_step
++;
1188 if (!tomoyo_flush(head
))
1190 head
->r
.cond_step
++;
1193 tomoyo_set_lf(head
);
1200 * tomoyo_set_group - Print "acl_group " header keyword and category name.
1202 * @head: Pointer to "struct tomoyo_io_buffer".
1203 * @category: Category name.
1207 static void tomoyo_set_group(struct tomoyo_io_buffer
*head
,
1208 const char *category
)
1210 if (head
->type
== TOMOYO_EXCEPTIONPOLICY
) {
1211 tomoyo_print_namespace(head
);
1212 tomoyo_io_printf(head
, "acl_group %u ",
1213 head
->r
.acl_group_index
);
1215 tomoyo_set_string(head
, category
);
1219 * tomoyo_print_entry - Print an ACL entry.
1221 * @head: Pointer to "struct tomoyo_io_buffer".
1222 * @acl: Pointer to an ACL entry.
1224 * Returns true on success, false otherwise.
1226 static bool tomoyo_print_entry(struct tomoyo_io_buffer
*head
,
1227 struct tomoyo_acl_info
*acl
)
1229 const u8 acl_type
= acl
->type
;
1233 if (head
->r
.print_cond_part
)
1234 goto print_cond_part
;
1235 if (acl
->is_deleted
)
1237 if (!tomoyo_flush(head
))
1239 else if (acl_type
== TOMOYO_TYPE_PATH_ACL
) {
1240 struct tomoyo_path_acl
*ptr
=
1241 container_of(acl
, typeof(*ptr
), head
);
1242 const u16 perm
= ptr
->perm
;
1243 for (bit
= 0; bit
< TOMOYO_MAX_PATH_OPERATION
; bit
++) {
1244 if (!(perm
& (1 << bit
)))
1246 if (head
->r
.print_transition_related_only
&&
1247 bit
!= TOMOYO_TYPE_EXECUTE
)
1250 tomoyo_set_group(head
, "file ");
1253 tomoyo_set_slash(head
);
1255 tomoyo_set_string(head
, tomoyo_path_keyword
[bit
]);
1259 tomoyo_print_name_union(head
, &ptr
->name
);
1260 } else if (head
->r
.print_transition_related_only
) {
1262 } else if (acl_type
== TOMOYO_TYPE_PATH2_ACL
) {
1263 struct tomoyo_path2_acl
*ptr
=
1264 container_of(acl
, typeof(*ptr
), head
);
1265 const u8 perm
= ptr
->perm
;
1266 for (bit
= 0; bit
< TOMOYO_MAX_PATH2_OPERATION
; bit
++) {
1267 if (!(perm
& (1 << bit
)))
1270 tomoyo_set_group(head
, "file ");
1273 tomoyo_set_slash(head
);
1275 tomoyo_set_string(head
, tomoyo_mac_keywords
1276 [tomoyo_pp2mac
[bit
]]);
1280 tomoyo_print_name_union(head
, &ptr
->name1
);
1281 tomoyo_print_name_union(head
, &ptr
->name2
);
1282 } else if (acl_type
== TOMOYO_TYPE_PATH_NUMBER_ACL
) {
1283 struct tomoyo_path_number_acl
*ptr
=
1284 container_of(acl
, typeof(*ptr
), head
);
1285 const u8 perm
= ptr
->perm
;
1286 for (bit
= 0; bit
< TOMOYO_MAX_PATH_NUMBER_OPERATION
; bit
++) {
1287 if (!(perm
& (1 << bit
)))
1290 tomoyo_set_group(head
, "file ");
1293 tomoyo_set_slash(head
);
1295 tomoyo_set_string(head
, tomoyo_mac_keywords
1296 [tomoyo_pn2mac
[bit
]]);
1300 tomoyo_print_name_union(head
, &ptr
->name
);
1301 tomoyo_print_number_union(head
, &ptr
->number
);
1302 } else if (acl_type
== TOMOYO_TYPE_MKDEV_ACL
) {
1303 struct tomoyo_mkdev_acl
*ptr
=
1304 container_of(acl
, typeof(*ptr
), head
);
1305 const u8 perm
= ptr
->perm
;
1306 for (bit
= 0; bit
< TOMOYO_MAX_MKDEV_OPERATION
; bit
++) {
1307 if (!(perm
& (1 << bit
)))
1310 tomoyo_set_group(head
, "file ");
1313 tomoyo_set_slash(head
);
1315 tomoyo_set_string(head
, tomoyo_mac_keywords
1316 [tomoyo_pnnn2mac
[bit
]]);
1320 tomoyo_print_name_union(head
, &ptr
->name
);
1321 tomoyo_print_number_union(head
, &ptr
->mode
);
1322 tomoyo_print_number_union(head
, &ptr
->major
);
1323 tomoyo_print_number_union(head
, &ptr
->minor
);
1324 } else if (acl_type
== TOMOYO_TYPE_MOUNT_ACL
) {
1325 struct tomoyo_mount_acl
*ptr
=
1326 container_of(acl
, typeof(*ptr
), head
);
1327 tomoyo_set_group(head
, "file mount");
1328 tomoyo_print_name_union(head
, &ptr
->dev_name
);
1329 tomoyo_print_name_union(head
, &ptr
->dir_name
);
1330 tomoyo_print_name_union(head
, &ptr
->fs_type
);
1331 tomoyo_print_number_union(head
, &ptr
->flags
);
1334 head
->r
.print_cond_part
= true;
1335 head
->r
.cond_step
= 0;
1336 if (!tomoyo_flush(head
))
1339 if (!tomoyo_print_condition(head
, acl
->cond
))
1341 head
->r
.print_cond_part
= false;
1343 tomoyo_set_lf(head
);
1349 * tomoyo_read_domain2 - Read domain policy.
1351 * @head: Pointer to "struct tomoyo_io_buffer".
1352 * @list: Pointer to "struct list_head".
1354 * Caller holds tomoyo_read_lock().
1356 * Returns true on success, false otherwise.
1358 static bool tomoyo_read_domain2(struct tomoyo_io_buffer
*head
,
1359 struct list_head
*list
)
1361 list_for_each_cookie(head
->r
.acl
, list
) {
1362 struct tomoyo_acl_info
*ptr
=
1363 list_entry(head
->r
.acl
, typeof(*ptr
), list
);
1364 if (!tomoyo_print_entry(head
, ptr
))
1372 * tomoyo_read_domain - Read domain policy.
1374 * @head: Pointer to "struct tomoyo_io_buffer".
1376 * Caller holds tomoyo_read_lock().
1378 static void tomoyo_read_domain(struct tomoyo_io_buffer
*head
)
1382 list_for_each_cookie(head
->r
.domain
, &tomoyo_domain_list
) {
1383 struct tomoyo_domain_info
*domain
=
1384 list_entry(head
->r
.domain
, typeof(*domain
), list
);
1385 switch (head
->r
.step
) {
1388 if (domain
->is_deleted
&&
1389 !head
->r
.print_this_domain_only
)
1391 /* Print domainname and flags. */
1392 tomoyo_set_string(head
, domain
->domainname
->name
);
1393 tomoyo_set_lf(head
);
1394 tomoyo_io_printf(head
, "use_profile %u\n",
1396 tomoyo_io_printf(head
, "use_group %u\n",
1398 for (i
= 0; i
< TOMOYO_MAX_DOMAIN_INFO_FLAGS
; i
++)
1399 if (domain
->flags
[i
])
1400 tomoyo_set_string(head
, tomoyo_dif
[i
]);
1402 tomoyo_set_lf(head
);
1405 if (!tomoyo_read_domain2(head
, &domain
->acl_info_list
))
1408 if (!tomoyo_set_lf(head
))
1413 if (head
->r
.print_this_domain_only
)
1422 * tomoyo_write_pid: Specify PID to obtain domainname.
1424 * @head: Pointer to "struct tomoyo_io_buffer".
1428 static int tomoyo_write_pid(struct tomoyo_io_buffer
*head
)
1430 head
->r
.eof
= false;
1435 * tomoyo_read_pid - Get domainname of the specified PID.
1437 * @head: Pointer to "struct tomoyo_io_buffer".
1439 * Returns the domainname which the specified PID is in on success,
1440 * empty string otherwise.
1441 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1442 * using read()/write() interface rather than sysctl() interface.
1444 static void tomoyo_read_pid(struct tomoyo_io_buffer
*head
)
1446 char *buf
= head
->write_buf
;
1447 bool global_pid
= false;
1449 struct task_struct
*p
;
1450 struct tomoyo_domain_info
*domain
= NULL
;
1452 /* Accessing write_buf is safe because head->io_sem is held. */
1455 return; /* Do nothing if open(O_RDONLY). */
1457 if (head
->r
.w_pos
|| head
->r
.eof
)
1460 if (tomoyo_str_starts(&buf
, "global-pid "))
1462 pid
= (unsigned int) simple_strtoul(buf
, NULL
, 10);
1464 read_lock(&tasklist_lock
);
1466 p
= find_task_by_pid_ns(pid
, &init_pid_ns
);
1468 p
= find_task_by_vpid(pid
);
1470 domain
= tomoyo_real_domain(p
);
1471 read_unlock(&tasklist_lock
);
1475 tomoyo_io_printf(head
, "%u %u ", pid
, domain
->profile
);
1476 tomoyo_set_string(head
, domain
->domainname
->name
);
1479 static const char *tomoyo_transition_type
[TOMOYO_MAX_TRANSITION_TYPE
] = {
1480 [TOMOYO_TRANSITION_CONTROL_NO_RESET
] = "no_reset_domain ",
1481 [TOMOYO_TRANSITION_CONTROL_RESET
] = "reset_domain ",
1482 [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE
] = "no_initialize_domain ",
1483 [TOMOYO_TRANSITION_CONTROL_INITIALIZE
] = "initialize_domain ",
1484 [TOMOYO_TRANSITION_CONTROL_NO_KEEP
] = "no_keep_domain ",
1485 [TOMOYO_TRANSITION_CONTROL_KEEP
] = "keep_domain ",
1488 static const char *tomoyo_group_name
[TOMOYO_MAX_GROUP
] = {
1489 [TOMOYO_PATH_GROUP
] = "path_group ",
1490 [TOMOYO_NUMBER_GROUP
] = "number_group ",
1494 * tomoyo_write_exception - Write exception policy.
1496 * @head: Pointer to "struct tomoyo_io_buffer".
1498 * Returns 0 on success, negative value otherwise.
1500 * Caller holds tomoyo_read_lock().
1502 static int tomoyo_write_exception(struct tomoyo_io_buffer
*head
)
1504 const bool is_delete
= head
->w
.is_delete
;
1505 struct tomoyo_acl_param param
= {
1507 .is_delete
= is_delete
,
1508 .data
= head
->write_buf
,
1511 if (tomoyo_str_starts(¶m
.data
, "aggregator "))
1512 return tomoyo_write_aggregator(¶m
);
1513 for (i
= 0; i
< TOMOYO_MAX_TRANSITION_TYPE
; i
++)
1514 if (tomoyo_str_starts(¶m
.data
, tomoyo_transition_type
[i
]))
1515 return tomoyo_write_transition_control(¶m
, i
);
1516 for (i
= 0; i
< TOMOYO_MAX_GROUP
; i
++)
1517 if (tomoyo_str_starts(¶m
.data
, tomoyo_group_name
[i
]))
1518 return tomoyo_write_group(¶m
, i
);
1519 if (tomoyo_str_starts(¶m
.data
, "acl_group ")) {
1522 group
= simple_strtoul(param
.data
, &data
, 10);
1523 if (group
< TOMOYO_MAX_ACL_GROUPS
&& *data
++ == ' ')
1524 return tomoyo_write_domain2
1525 (head
->w
.ns
, &head
->w
.ns
->acl_group
[group
],
1532 * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group" list.
1534 * @head: Pointer to "struct tomoyo_io_buffer".
1535 * @idx: Index number.
1537 * Returns true on success, false otherwise.
1539 * Caller holds tomoyo_read_lock().
1541 static bool tomoyo_read_group(struct tomoyo_io_buffer
*head
, const int idx
)
1543 struct tomoyo_policy_namespace
*ns
=
1544 container_of(head
->r
.ns
, typeof(*ns
), namespace_list
);
1545 struct list_head
*list
= &ns
->group_list
[idx
];
1546 list_for_each_cookie(head
->r
.group
, list
) {
1547 struct tomoyo_group
*group
=
1548 list_entry(head
->r
.group
, typeof(*group
), head
.list
);
1549 list_for_each_cookie(head
->r
.acl
, &group
->member_list
) {
1550 struct tomoyo_acl_head
*ptr
=
1551 list_entry(head
->r
.acl
, typeof(*ptr
), list
);
1552 if (ptr
->is_deleted
)
1554 if (!tomoyo_flush(head
))
1556 tomoyo_print_namespace(head
);
1557 tomoyo_set_string(head
, tomoyo_group_name
[idx
]);
1558 tomoyo_set_string(head
, group
->group_name
->name
);
1559 if (idx
== TOMOYO_PATH_GROUP
) {
1560 tomoyo_set_space(head
);
1561 tomoyo_set_string(head
, container_of
1562 (ptr
, struct tomoyo_path_group
,
1563 head
)->member_name
->name
);
1564 } else if (idx
== TOMOYO_NUMBER_GROUP
) {
1565 tomoyo_print_number_union(head
, &container_of
1567 struct tomoyo_number_group
,
1570 tomoyo_set_lf(head
);
1574 head
->r
.group
= NULL
;
1579 * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
1581 * @head: Pointer to "struct tomoyo_io_buffer".
1582 * @idx: Index number.
1584 * Returns true on success, false otherwise.
1586 * Caller holds tomoyo_read_lock().
1588 static bool tomoyo_read_policy(struct tomoyo_io_buffer
*head
, const int idx
)
1590 struct tomoyo_policy_namespace
*ns
=
1591 container_of(head
->r
.ns
, typeof(*ns
), namespace_list
);
1592 struct list_head
*list
= &ns
->policy_list
[idx
];
1593 list_for_each_cookie(head
->r
.acl
, list
) {
1594 struct tomoyo_acl_head
*acl
=
1595 container_of(head
->r
.acl
, typeof(*acl
), list
);
1596 if (acl
->is_deleted
)
1598 if (!tomoyo_flush(head
))
1601 case TOMOYO_ID_TRANSITION_CONTROL
:
1603 struct tomoyo_transition_control
*ptr
=
1604 container_of(acl
, typeof(*ptr
), head
);
1605 tomoyo_print_namespace(head
);
1606 tomoyo_set_string(head
, tomoyo_transition_type
1608 tomoyo_set_string(head
, ptr
->program
?
1609 ptr
->program
->name
: "any");
1610 tomoyo_set_string(head
, " from ");
1611 tomoyo_set_string(head
, ptr
->domainname
?
1612 ptr
->domainname
->name
:
1616 case TOMOYO_ID_AGGREGATOR
:
1618 struct tomoyo_aggregator
*ptr
=
1619 container_of(acl
, typeof(*ptr
), head
);
1620 tomoyo_print_namespace(head
);
1621 tomoyo_set_string(head
, "aggregator ");
1622 tomoyo_set_string(head
,
1623 ptr
->original_name
->name
);
1624 tomoyo_set_space(head
);
1625 tomoyo_set_string(head
,
1626 ptr
->aggregated_name
->name
);
1632 tomoyo_set_lf(head
);
1639 * tomoyo_read_exception - Read exception policy.
1641 * @head: Pointer to "struct tomoyo_io_buffer".
1643 * Caller holds tomoyo_read_lock().
1645 static void tomoyo_read_exception(struct tomoyo_io_buffer
*head
)
1647 struct tomoyo_policy_namespace
*ns
=
1648 container_of(head
->r
.ns
, typeof(*ns
), namespace_list
);
1651 while (head
->r
.step
< TOMOYO_MAX_POLICY
&&
1652 tomoyo_read_policy(head
, head
->r
.step
))
1654 if (head
->r
.step
< TOMOYO_MAX_POLICY
)
1656 while (head
->r
.step
< TOMOYO_MAX_POLICY
+ TOMOYO_MAX_GROUP
&&
1657 tomoyo_read_group(head
, head
->r
.step
- TOMOYO_MAX_POLICY
))
1659 if (head
->r
.step
< TOMOYO_MAX_POLICY
+ TOMOYO_MAX_GROUP
)
1661 while (head
->r
.step
< TOMOYO_MAX_POLICY
+ TOMOYO_MAX_GROUP
1662 + TOMOYO_MAX_ACL_GROUPS
) {
1663 head
->r
.acl_group_index
= head
->r
.step
- TOMOYO_MAX_POLICY
1665 if (!tomoyo_read_domain2(head
, &ns
->acl_group
1666 [head
->r
.acl_group_index
]))
1673 /* Wait queue for kernel -> userspace notification. */
1674 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait
);
1675 /* Wait queue for userspace -> kernel notification. */
1676 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait
);
1678 /* Structure for query. */
1679 struct tomoyo_query
{
1680 struct list_head list
;
1683 unsigned int serial
;
1689 /* The list for "struct tomoyo_query". */
1690 static LIST_HEAD(tomoyo_query_list
);
1692 /* Lock for manipulating tomoyo_query_list. */
1693 static DEFINE_SPINLOCK(tomoyo_query_list_lock
);
1696 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1699 static atomic_t tomoyo_query_observers
= ATOMIC_INIT(0);
1702 * tomoyo_truncate - Truncate a line.
1704 * @str: String to truncate.
1706 * Returns length of truncated @str.
1708 static int tomoyo_truncate(char *str
)
1711 while (*(unsigned char *) str
> (unsigned char) ' ')
1714 return strlen(start
) + 1;
1718 * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
1720 * @domain: Pointer to "struct tomoyo_domain_info".
1721 * @header: Lines containing ACL.
1725 static void tomoyo_add_entry(struct tomoyo_domain_info
*domain
, char *header
)
1728 char *realpath
= NULL
;
1729 char *symlink
= NULL
;
1730 char *cp
= strchr(header
, '\n');
1734 cp
= strchr(cp
+ 1, '\n');
1738 len
= strlen(cp
) + 1;
1739 /* strstr() will return NULL if ordering is wrong. */
1741 realpath
= strstr(header
, " exec={ realpath=\"");
1744 len
+= tomoyo_truncate(realpath
) + 6;
1746 symlink
= strstr(header
, " symlink.target=\"");
1748 len
+= tomoyo_truncate(symlink
+ 1) + 1;
1750 buffer
= kmalloc(len
, GFP_NOFS
);
1753 snprintf(buffer
, len
- 1, "%s", cp
);
1755 tomoyo_addprintf(buffer
, len
, " exec.%s", realpath
);
1757 tomoyo_addprintf(buffer
, len
, "%s", symlink
);
1758 tomoyo_normalize_line(buffer
);
1759 if (!tomoyo_write_domain2(domain
->ns
, &domain
->acl_info_list
, buffer
,
1761 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES
);
1766 * tomoyo_supervisor - Ask for the supervisor's decision.
1768 * @r: Pointer to "struct tomoyo_request_info".
1769 * @fmt: The printf()'s format string, followed by parameters.
1771 * Returns 0 if the supervisor decided to permit the access request which
1772 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
1773 * supervisor decided to retry the access request which violated the policy in
1774 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
1776 int tomoyo_supervisor(struct tomoyo_request_info
*r
, const char *fmt
, ...)
1781 static unsigned int tomoyo_serial
;
1782 struct tomoyo_query entry
= { };
1783 bool quota_exceeded
= false;
1784 va_start(args
, fmt
);
1785 len
= vsnprintf((char *) &len
, 1, fmt
, args
) + 1;
1787 /* Write /sys/kernel/security/tomoyo/audit. */
1788 va_start(args
, fmt
);
1789 tomoyo_write_log2(r
, len
, fmt
, args
);
1791 /* Nothing more to do if granted. */
1795 tomoyo_update_stat(r
->mode
);
1797 case TOMOYO_CONFIG_ENFORCING
:
1799 if (atomic_read(&tomoyo_query_observers
))
1802 case TOMOYO_CONFIG_LEARNING
:
1804 /* Check max_learning_entry parameter. */
1805 if (tomoyo_domain_quota_is_ok(r
))
1812 va_start(args
, fmt
);
1813 entry
.query
= tomoyo_init_log(r
, len
, fmt
, args
);
1817 entry
.query_len
= strlen(entry
.query
) + 1;
1819 tomoyo_add_entry(r
->domain
, entry
.query
);
1822 len
= tomoyo_round2(entry
.query_len
);
1823 spin_lock(&tomoyo_query_list_lock
);
1824 if (tomoyo_memory_quota
[TOMOYO_MEMORY_QUERY
] &&
1825 tomoyo_memory_used
[TOMOYO_MEMORY_QUERY
] + len
1826 >= tomoyo_memory_quota
[TOMOYO_MEMORY_QUERY
]) {
1827 quota_exceeded
= true;
1829 entry
.serial
= tomoyo_serial
++;
1830 entry
.retry
= r
->retry
;
1831 tomoyo_memory_used
[TOMOYO_MEMORY_QUERY
] += len
;
1832 list_add_tail(&entry
.list
, &tomoyo_query_list
);
1834 spin_unlock(&tomoyo_query_list_lock
);
1837 /* Give 10 seconds for supervisor's opinion. */
1838 while (entry
.timer
< 10) {
1839 wake_up_all(&tomoyo_query_wait
);
1840 if (wait_event_interruptible_timeout
1841 (tomoyo_answer_wait
, entry
.answer
||
1842 !atomic_read(&tomoyo_query_observers
), HZ
))
1847 spin_lock(&tomoyo_query_list_lock
);
1848 list_del(&entry
.list
);
1849 tomoyo_memory_used
[TOMOYO_MEMORY_QUERY
] -= len
;
1850 spin_unlock(&tomoyo_query_list_lock
);
1851 switch (entry
.answer
) {
1852 case 3: /* Asked to retry by administrator. */
1853 error
= TOMOYO_RETRY_REQUEST
;
1857 /* Granted by administrator. */
1861 /* Timed out or rejected by administrator. */
1870 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
1872 * @file: Pointer to "struct file".
1873 * @wait: Pointer to "poll_table".
1875 * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise.
1877 * Waits for access requests which violated policy in enforcing mode.
1879 static int tomoyo_poll_query(struct file
*file
, poll_table
*wait
)
1881 struct list_head
*tmp
;
1884 for (i
= 0; i
< 2; i
++) {
1885 spin_lock(&tomoyo_query_list_lock
);
1886 list_for_each(tmp
, &tomoyo_query_list
) {
1887 struct tomoyo_query
*ptr
=
1888 list_entry(tmp
, typeof(*ptr
), list
);
1894 spin_unlock(&tomoyo_query_list_lock
);
1896 return POLLIN
| POLLRDNORM
;
1899 poll_wait(file
, &tomoyo_query_wait
, wait
);
1905 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
1907 * @head: Pointer to "struct tomoyo_io_buffer".
1909 static void tomoyo_read_query(struct tomoyo_io_buffer
*head
)
1911 struct list_head
*tmp
;
1912 unsigned int pos
= 0;
1917 if (head
->read_buf
) {
1918 kfree(head
->read_buf
);
1919 head
->read_buf
= NULL
;
1921 spin_lock(&tomoyo_query_list_lock
);
1922 list_for_each(tmp
, &tomoyo_query_list
) {
1923 struct tomoyo_query
*ptr
= list_entry(tmp
, typeof(*ptr
), list
);
1926 if (pos
++ != head
->r
.query_index
)
1928 len
= ptr
->query_len
;
1931 spin_unlock(&tomoyo_query_list_lock
);
1933 head
->r
.query_index
= 0;
1936 buf
= kzalloc(len
+ 32, GFP_NOFS
);
1940 spin_lock(&tomoyo_query_list_lock
);
1941 list_for_each(tmp
, &tomoyo_query_list
) {
1942 struct tomoyo_query
*ptr
= list_entry(tmp
, typeof(*ptr
), list
);
1945 if (pos
++ != head
->r
.query_index
)
1948 * Some query can be skipped because tomoyo_query_list
1949 * can change, but I don't care.
1951 if (len
== ptr
->query_len
)
1952 snprintf(buf
, len
+ 31, "Q%u-%hu\n%s", ptr
->serial
,
1953 ptr
->retry
, ptr
->query
);
1956 spin_unlock(&tomoyo_query_list_lock
);
1958 head
->read_buf
= buf
;
1959 head
->r
.w
[head
->r
.w_pos
++] = buf
;
1960 head
->r
.query_index
++;
1967 * tomoyo_write_answer - Write the supervisor's decision.
1969 * @head: Pointer to "struct tomoyo_io_buffer".
1971 * Returns 0 on success, -EINVAL otherwise.
1973 static int tomoyo_write_answer(struct tomoyo_io_buffer
*head
)
1975 char *data
= head
->write_buf
;
1976 struct list_head
*tmp
;
1977 unsigned int serial
;
1978 unsigned int answer
;
1979 spin_lock(&tomoyo_query_list_lock
);
1980 list_for_each(tmp
, &tomoyo_query_list
) {
1981 struct tomoyo_query
*ptr
= list_entry(tmp
, typeof(*ptr
), list
);
1984 spin_unlock(&tomoyo_query_list_lock
);
1985 if (sscanf(data
, "A%u=%u", &serial
, &answer
) != 2)
1987 spin_lock(&tomoyo_query_list_lock
);
1988 list_for_each(tmp
, &tomoyo_query_list
) {
1989 struct tomoyo_query
*ptr
= list_entry(tmp
, typeof(*ptr
), list
);
1990 if (ptr
->serial
!= serial
)
1993 ptr
->answer
= answer
;
1996 spin_unlock(&tomoyo_query_list_lock
);
2001 * tomoyo_read_version: Get version.
2003 * @head: Pointer to "struct tomoyo_io_buffer".
2005 * Returns version information.
2007 static void tomoyo_read_version(struct tomoyo_io_buffer
*head
)
2010 tomoyo_io_printf(head
, "2.4.0");
2016 * tomoyo_read_self_domain - Get the current process's domainname.
2018 * @head: Pointer to "struct tomoyo_io_buffer".
2020 * Returns the current process's domainname.
2022 static void tomoyo_read_self_domain(struct tomoyo_io_buffer
*head
)
2026 * tomoyo_domain()->domainname != NULL
2027 * because every process belongs to a domain and
2028 * the domain's name cannot be NULL.
2030 tomoyo_io_printf(head
, "%s", tomoyo_domain()->domainname
->name
);
2035 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2036 static const char * const tomoyo_policy_headers
[TOMOYO_MAX_POLICY_STAT
] = {
2037 [TOMOYO_STAT_POLICY_UPDATES
] = "update:",
2038 [TOMOYO_STAT_POLICY_LEARNING
] = "violation in learning mode:",
2039 [TOMOYO_STAT_POLICY_PERMISSIVE
] = "violation in permissive mode:",
2040 [TOMOYO_STAT_POLICY_ENFORCING
] = "violation in enforcing mode:",
2043 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2044 static const char * const tomoyo_memory_headers
[TOMOYO_MAX_MEMORY_STAT
] = {
2045 [TOMOYO_MEMORY_POLICY
] = "policy:",
2046 [TOMOYO_MEMORY_AUDIT
] = "audit log:",
2047 [TOMOYO_MEMORY_QUERY
] = "query message:",
2050 /* Timestamp counter for last updated. */
2051 static unsigned int tomoyo_stat_updated
[TOMOYO_MAX_POLICY_STAT
];
2052 /* Counter for number of updates. */
2053 static unsigned int tomoyo_stat_modified
[TOMOYO_MAX_POLICY_STAT
];
2056 * tomoyo_update_stat - Update statistic counters.
2058 * @index: Index for policy type.
2062 void tomoyo_update_stat(const u8 index
)
2065 do_gettimeofday(&tv
);
2067 * I don't use atomic operations because race condition is not fatal.
2069 tomoyo_stat_updated
[index
]++;
2070 tomoyo_stat_modified
[index
] = tv
.tv_sec
;
2074 * tomoyo_read_stat - Read statistic data.
2076 * @head: Pointer to "struct tomoyo_io_buffer".
2080 static void tomoyo_read_stat(struct tomoyo_io_buffer
*head
)
2083 unsigned int total
= 0;
2086 for (i
= 0; i
< TOMOYO_MAX_POLICY_STAT
; i
++) {
2087 tomoyo_io_printf(head
, "Policy %-30s %10u",
2088 tomoyo_policy_headers
[i
],
2089 tomoyo_stat_updated
[i
]);
2090 if (tomoyo_stat_modified
[i
]) {
2091 struct tomoyo_time stamp
;
2092 tomoyo_convert_time(tomoyo_stat_modified
[i
], &stamp
);
2093 tomoyo_io_printf(head
, " (Last: %04u/%02u/%02u "
2095 stamp
.year
, stamp
.month
, stamp
.day
,
2096 stamp
.hour
, stamp
.min
, stamp
.sec
);
2098 tomoyo_set_lf(head
);
2100 for (i
= 0; i
< TOMOYO_MAX_MEMORY_STAT
; i
++) {
2101 unsigned int used
= tomoyo_memory_used
[i
];
2103 tomoyo_io_printf(head
, "Memory used by %-22s %10u",
2104 tomoyo_memory_headers
[i
], used
);
2105 used
= tomoyo_memory_quota
[i
];
2107 tomoyo_io_printf(head
, " (Quota: %10u)", used
);
2108 tomoyo_set_lf(head
);
2110 tomoyo_io_printf(head
, "Total memory used: %10u\n",
2116 * tomoyo_write_stat - Set memory quota.
2118 * @head: Pointer to "struct tomoyo_io_buffer".
2122 static int tomoyo_write_stat(struct tomoyo_io_buffer
*head
)
2124 char *data
= head
->write_buf
;
2126 if (tomoyo_str_starts(&data
, "Memory used by "))
2127 for (i
= 0; i
< TOMOYO_MAX_MEMORY_STAT
; i
++)
2128 if (tomoyo_str_starts(&data
, tomoyo_memory_headers
[i
]))
2129 sscanf(data
, "%u", &tomoyo_memory_quota
[i
]);
2134 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
2136 * @type: Type of interface.
2137 * @file: Pointer to "struct file".
2139 * Returns 0 on success, negative value otherwise.
2141 int tomoyo_open_control(const u8 type
, struct file
*file
)
2143 struct tomoyo_io_buffer
*head
= kzalloc(sizeof(*head
), GFP_NOFS
);
2147 mutex_init(&head
->io_sem
);
2150 case TOMOYO_DOMAINPOLICY
:
2151 /* /sys/kernel/security/tomoyo/domain_policy */
2152 head
->write
= tomoyo_write_domain
;
2153 head
->read
= tomoyo_read_domain
;
2155 case TOMOYO_EXCEPTIONPOLICY
:
2156 /* /sys/kernel/security/tomoyo/exception_policy */
2157 head
->write
= tomoyo_write_exception
;
2158 head
->read
= tomoyo_read_exception
;
2161 /* /sys/kernel/security/tomoyo/audit */
2162 head
->poll
= tomoyo_poll_log
;
2163 head
->read
= tomoyo_read_log
;
2165 case TOMOYO_SELFDOMAIN
:
2166 /* /sys/kernel/security/tomoyo/self_domain */
2167 head
->read
= tomoyo_read_self_domain
;
2169 case TOMOYO_PROCESS_STATUS
:
2170 /* /sys/kernel/security/tomoyo/.process_status */
2171 head
->write
= tomoyo_write_pid
;
2172 head
->read
= tomoyo_read_pid
;
2174 case TOMOYO_VERSION
:
2175 /* /sys/kernel/security/tomoyo/version */
2176 head
->read
= tomoyo_read_version
;
2177 head
->readbuf_size
= 128;
2180 /* /sys/kernel/security/tomoyo/stat */
2181 head
->write
= tomoyo_write_stat
;
2182 head
->read
= tomoyo_read_stat
;
2183 head
->readbuf_size
= 1024;
2185 case TOMOYO_PROFILE
:
2186 /* /sys/kernel/security/tomoyo/profile */
2187 head
->write
= tomoyo_write_profile
;
2188 head
->read
= tomoyo_read_profile
;
2190 case TOMOYO_QUERY
: /* /sys/kernel/security/tomoyo/query */
2191 head
->poll
= tomoyo_poll_query
;
2192 head
->write
= tomoyo_write_answer
;
2193 head
->read
= tomoyo_read_query
;
2195 case TOMOYO_MANAGER
:
2196 /* /sys/kernel/security/tomoyo/manager */
2197 head
->write
= tomoyo_write_manager
;
2198 head
->read
= tomoyo_read_manager
;
2201 if (!(file
->f_mode
& FMODE_READ
)) {
2203 * No need to allocate read_buf since it is not opened
2208 } else if (!head
->poll
) {
2209 /* Don't allocate read_buf for poll() access. */
2210 if (!head
->readbuf_size
)
2211 head
->readbuf_size
= 4096 * 2;
2212 head
->read_buf
= kzalloc(head
->readbuf_size
, GFP_NOFS
);
2213 if (!head
->read_buf
) {
2218 if (!(file
->f_mode
& FMODE_WRITE
)) {
2220 * No need to allocate write_buf since it is not opened
2224 } else if (head
->write
) {
2225 head
->writebuf_size
= 4096 * 2;
2226 head
->write_buf
= kzalloc(head
->writebuf_size
, GFP_NOFS
);
2227 if (!head
->write_buf
) {
2228 kfree(head
->read_buf
);
2234 * If the file is /sys/kernel/security/tomoyo/query , increment the
2236 * The obserber counter is used by tomoyo_supervisor() to see if
2237 * there is some process monitoring /sys/kernel/security/tomoyo/query.
2239 if (type
== TOMOYO_QUERY
)
2240 atomic_inc(&tomoyo_query_observers
);
2241 file
->private_data
= head
;
2242 tomoyo_notify_gc(head
, true);
2247 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
2249 * @file: Pointer to "struct file".
2250 * @wait: Pointer to "poll_table".
2252 * Waits for read readiness.
2253 * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd and
2254 * /sys/kernel/security/tomoyo/audit is handled by /usr/sbin/tomoyo-auditd.
2256 int tomoyo_poll_control(struct file
*file
, poll_table
*wait
)
2258 struct tomoyo_io_buffer
*head
= file
->private_data
;
2261 return head
->poll(file
, wait
);
2265 * tomoyo_set_namespace_cursor - Set namespace to read.
2267 * @head: Pointer to "struct tomoyo_io_buffer".
2271 static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer
*head
)
2273 struct list_head
*ns
;
2274 if (head
->type
!= TOMOYO_EXCEPTIONPOLICY
&&
2275 head
->type
!= TOMOYO_PROFILE
)
2278 * If this is the first read, or reading previous namespace finished
2279 * and has more namespaces to read, update the namespace cursor.
2282 if (!ns
|| (head
->r
.eof
&& ns
->next
!= &tomoyo_namespace_list
)) {
2283 /* Clearing is OK because tomoyo_flush() returned true. */
2284 memset(&head
->r
, 0, sizeof(head
->r
));
2285 head
->r
.ns
= ns
? ns
->next
: tomoyo_namespace_list
.next
;
2290 * tomoyo_has_more_namespace - Check for unread namespaces.
2292 * @head: Pointer to "struct tomoyo_io_buffer".
2294 * Returns true if we have more entries to print, false otherwise.
2296 static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer
*head
)
2298 return (head
->type
== TOMOYO_EXCEPTIONPOLICY
||
2299 head
->type
== TOMOYO_PROFILE
) && head
->r
.eof
&&
2300 head
->r
.ns
->next
!= &tomoyo_namespace_list
;
2304 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
2306 * @head: Pointer to "struct tomoyo_io_buffer".
2307 * @buffer: Poiner to buffer to write to.
2308 * @buffer_len: Size of @buffer.
2310 * Returns bytes read on success, negative value otherwise.
2312 ssize_t
tomoyo_read_control(struct tomoyo_io_buffer
*head
, char __user
*buffer
,
2313 const int buffer_len
)
2320 if (mutex_lock_interruptible(&head
->io_sem
))
2322 head
->read_user_buf
= buffer
;
2323 head
->read_user_buf_avail
= buffer_len
;
2324 idx
= tomoyo_read_lock();
2325 if (tomoyo_flush(head
))
2326 /* Call the policy handler. */
2328 tomoyo_set_namespace_cursor(head
);
2330 } while (tomoyo_flush(head
) &&
2331 tomoyo_has_more_namespace(head
));
2332 tomoyo_read_unlock(idx
);
2333 len
= head
->read_user_buf
- buffer
;
2334 mutex_unlock(&head
->io_sem
);
2339 * tomoyo_parse_policy - Parse a policy line.
2341 * @head: Poiter to "struct tomoyo_io_buffer".
2342 * @line: Line to parse.
2344 * Returns 0 on success, negative value otherwise.
2346 * Caller holds tomoyo_read_lock().
2348 static int tomoyo_parse_policy(struct tomoyo_io_buffer
*head
, char *line
)
2350 /* Delete request? */
2351 head
->w
.is_delete
= !strncmp(line
, "delete ", 7);
2352 if (head
->w
.is_delete
)
2353 memmove(line
, line
+ 7, strlen(line
+ 7) + 1);
2354 /* Selecting namespace to update. */
2355 if (head
->type
== TOMOYO_EXCEPTIONPOLICY
||
2356 head
->type
== TOMOYO_PROFILE
) {
2358 char *cp
= strchr(line
, ' ');
2361 head
->w
.ns
= tomoyo_assign_namespace(line
);
2362 memmove(line
, cp
, strlen(cp
) + 1);
2366 head
->w
.ns
= &tomoyo_kernel_namespace
;
2367 /* Don't allow updating if namespace is invalid. */
2371 /* Do the update. */
2372 return head
->write(head
);
2376 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
2378 * @head: Pointer to "struct tomoyo_io_buffer".
2379 * @buffer: Pointer to buffer to read from.
2380 * @buffer_len: Size of @buffer.
2382 * Returns @buffer_len on success, negative value otherwise.
2384 ssize_t
tomoyo_write_control(struct tomoyo_io_buffer
*head
,
2385 const char __user
*buffer
, const int buffer_len
)
2387 int error
= buffer_len
;
2388 size_t avail_len
= buffer_len
;
2389 char *cp0
= head
->write_buf
;
2393 if (!access_ok(VERIFY_READ
, buffer
, buffer_len
))
2395 if (mutex_lock_interruptible(&head
->io_sem
))
2397 idx
= tomoyo_read_lock();
2398 /* Read a line and dispatch it to the policy handler. */
2399 while (avail_len
> 0) {
2401 if (head
->w
.avail
>= head
->writebuf_size
- 1) {
2402 const int len
= head
->writebuf_size
* 2;
2403 char *cp
= kzalloc(len
, GFP_NOFS
);
2408 memmove(cp
, cp0
, head
->w
.avail
);
2410 head
->write_buf
= cp
;
2412 head
->writebuf_size
= len
;
2414 if (get_user(c
, buffer
)) {
2420 cp0
[head
->w
.avail
++] = c
;
2423 cp0
[head
->w
.avail
- 1] = '\0';
2425 tomoyo_normalize_line(cp0
);
2426 if (!strcmp(cp0
, "reset")) {
2427 head
->w
.ns
= &tomoyo_kernel_namespace
;
2428 head
->w
.domain
= NULL
;
2429 memset(&head
->r
, 0, sizeof(head
->r
));
2432 /* Don't allow updating policies by non manager programs. */
2433 switch (head
->type
) {
2434 case TOMOYO_PROCESS_STATUS
:
2435 /* This does not write anything. */
2437 case TOMOYO_DOMAINPOLICY
:
2438 if (tomoyo_select_domain(head
, cp0
))
2441 case TOMOYO_EXCEPTIONPOLICY
:
2442 if (!strcmp(cp0
, "select transition_only")) {
2443 head
->r
.print_transition_related_only
= true;
2448 if (!tomoyo_manager()) {
2453 switch (tomoyo_parse_policy(head
, cp0
)) {
2458 switch (head
->type
) {
2459 case TOMOYO_DOMAINPOLICY
:
2460 case TOMOYO_EXCEPTIONPOLICY
:
2462 case TOMOYO_PROFILE
:
2463 case TOMOYO_MANAGER
:
2464 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES
);
2473 tomoyo_read_unlock(idx
);
2474 mutex_unlock(&head
->io_sem
);
2479 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
2481 * @head: Pointer to "struct tomoyo_io_buffer".
2485 int tomoyo_close_control(struct tomoyo_io_buffer
*head
)
2488 * If the file is /sys/kernel/security/tomoyo/query , decrement the
2491 if (head
->type
== TOMOYO_QUERY
&&
2492 atomic_dec_and_test(&tomoyo_query_observers
))
2493 wake_up_all(&tomoyo_answer_wait
);
2494 tomoyo_notify_gc(head
, false);
2499 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
2501 void tomoyo_check_profile(void)
2503 struct tomoyo_domain_info
*domain
;
2504 const int idx
= tomoyo_read_lock();
2505 tomoyo_policy_loaded
= true;
2506 printk(KERN_INFO
"TOMOYO: 2.4.0\n");
2507 list_for_each_entry_rcu(domain
, &tomoyo_domain_list
, list
) {
2508 const u8 profile
= domain
->profile
;
2509 const struct tomoyo_policy_namespace
*ns
= domain
->ns
;
2510 if (ns
->profile_version
!= 20100903)
2512 "Profile version %u is not supported.\n",
2513 ns
->profile_version
);
2514 else if (!ns
->profile_ptr
[profile
])
2516 "Profile %u (used by '%s') is not defined.\n",
2517 profile
, domain
->domainname
->name
);
2521 "Userland tools for TOMOYO 2.4 must be installed and "
2522 "policy must be initialized.\n");
2523 printk(KERN_ERR
"Please see http://tomoyo.sourceforge.jp/2.4/ "
2524 "for more information.\n");
2527 tomoyo_read_unlock(idx
);
2528 printk(KERN_INFO
"Mandatory Access Control activated.\n");
2532 * tomoyo_load_builtin_policy - Load built-in policy.
2536 void __init
tomoyo_load_builtin_policy(void)
2539 * This include file is manually created and contains built-in policy
2540 * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy",
2541 * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager",
2542 * "tomoyo_builtin_stat" in the form of "static char [] __initdata".
2544 #include "builtin-policy.h"
2546 const int idx
= tomoyo_read_lock();
2547 for (i
= 0; i
< 5; i
++) {
2548 struct tomoyo_io_buffer head
= { };
2552 start
= tomoyo_builtin_profile
;
2553 head
.type
= TOMOYO_PROFILE
;
2554 head
.write
= tomoyo_write_profile
;
2557 start
= tomoyo_builtin_exception_policy
;
2558 head
.type
= TOMOYO_EXCEPTIONPOLICY
;
2559 head
.write
= tomoyo_write_exception
;
2562 start
= tomoyo_builtin_domain_policy
;
2563 head
.type
= TOMOYO_DOMAINPOLICY
;
2564 head
.write
= tomoyo_write_domain
;
2567 start
= tomoyo_builtin_manager
;
2568 head
.type
= TOMOYO_MANAGER
;
2569 head
.write
= tomoyo_write_manager
;
2572 start
= tomoyo_builtin_stat
;
2573 head
.type
= TOMOYO_STAT
;
2574 head
.write
= tomoyo_write_stat
;
2578 char *end
= strchr(start
, '\n');
2582 tomoyo_normalize_line(start
);
2583 head
.write_buf
= start
;
2584 tomoyo_parse_policy(&head
, start
);
2588 tomoyo_read_unlock(idx
);
2589 #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
2590 tomoyo_check_profile();