2 * security/tomoyo/common.c
4 * Copyright (C) 2005-2011 NTT DATA CORPORATION
7 #include <linux/uaccess.h>
8 #include <linux/slab.h>
9 #include <linux/security.h>
12 /* String table for operation mode. */
13 const char * const tomoyo_mode
[TOMOYO_CONFIG_MAX_MODE
] = {
14 [TOMOYO_CONFIG_DISABLED
] = "disabled",
15 [TOMOYO_CONFIG_LEARNING
] = "learning",
16 [TOMOYO_CONFIG_PERMISSIVE
] = "permissive",
17 [TOMOYO_CONFIG_ENFORCING
] = "enforcing"
20 /* String table for /sys/kernel/security/tomoyo/profile */
21 const char * const tomoyo_mac_keywords
[TOMOYO_MAX_MAC_INDEX
22 + TOMOYO_MAX_MAC_CATEGORY_INDEX
] = {
23 /* CONFIG::file group */
24 [TOMOYO_MAC_FILE_EXECUTE
] = "execute",
25 [TOMOYO_MAC_FILE_OPEN
] = "open",
26 [TOMOYO_MAC_FILE_CREATE
] = "create",
27 [TOMOYO_MAC_FILE_UNLINK
] = "unlink",
28 [TOMOYO_MAC_FILE_GETATTR
] = "getattr",
29 [TOMOYO_MAC_FILE_MKDIR
] = "mkdir",
30 [TOMOYO_MAC_FILE_RMDIR
] = "rmdir",
31 [TOMOYO_MAC_FILE_MKFIFO
] = "mkfifo",
32 [TOMOYO_MAC_FILE_MKSOCK
] = "mksock",
33 [TOMOYO_MAC_FILE_TRUNCATE
] = "truncate",
34 [TOMOYO_MAC_FILE_SYMLINK
] = "symlink",
35 [TOMOYO_MAC_FILE_MKBLOCK
] = "mkblock",
36 [TOMOYO_MAC_FILE_MKCHAR
] = "mkchar",
37 [TOMOYO_MAC_FILE_LINK
] = "link",
38 [TOMOYO_MAC_FILE_RENAME
] = "rename",
39 [TOMOYO_MAC_FILE_CHMOD
] = "chmod",
40 [TOMOYO_MAC_FILE_CHOWN
] = "chown",
41 [TOMOYO_MAC_FILE_CHGRP
] = "chgrp",
42 [TOMOYO_MAC_FILE_IOCTL
] = "ioctl",
43 [TOMOYO_MAC_FILE_CHROOT
] = "chroot",
44 [TOMOYO_MAC_FILE_MOUNT
] = "mount",
45 [TOMOYO_MAC_FILE_UMOUNT
] = "unmount",
46 [TOMOYO_MAC_FILE_PIVOT_ROOT
] = "pivot_root",
47 /* CONFIG::network group */
48 [TOMOYO_MAC_NETWORK_INET_STREAM_BIND
] = "inet_stream_bind",
49 [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN
] = "inet_stream_listen",
50 [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT
] = "inet_stream_connect",
51 [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND
] = "inet_dgram_bind",
52 [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND
] = "inet_dgram_send",
53 [TOMOYO_MAC_NETWORK_INET_RAW_BIND
] = "inet_raw_bind",
54 [TOMOYO_MAC_NETWORK_INET_RAW_SEND
] = "inet_raw_send",
55 [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND
] = "unix_stream_bind",
56 [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN
] = "unix_stream_listen",
57 [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT
] = "unix_stream_connect",
58 [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND
] = "unix_dgram_bind",
59 [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND
] = "unix_dgram_send",
60 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND
] = "unix_seqpacket_bind",
61 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN
] = "unix_seqpacket_listen",
62 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT
] = "unix_seqpacket_connect",
63 /* CONFIG::misc group */
64 [TOMOYO_MAC_ENVIRON
] = "env",
66 [TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAC_CATEGORY_FILE
] = "file",
67 [TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAC_CATEGORY_NETWORK
] = "network",
68 [TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAC_CATEGORY_MISC
] = "misc",
71 /* String table for conditions. */
72 const char * const tomoyo_condition_keyword
[TOMOYO_MAX_CONDITION_KEYWORD
] = {
73 [TOMOYO_TASK_UID
] = "task.uid",
74 [TOMOYO_TASK_EUID
] = "task.euid",
75 [TOMOYO_TASK_SUID
] = "task.suid",
76 [TOMOYO_TASK_FSUID
] = "task.fsuid",
77 [TOMOYO_TASK_GID
] = "task.gid",
78 [TOMOYO_TASK_EGID
] = "task.egid",
79 [TOMOYO_TASK_SGID
] = "task.sgid",
80 [TOMOYO_TASK_FSGID
] = "task.fsgid",
81 [TOMOYO_TASK_PID
] = "task.pid",
82 [TOMOYO_TASK_PPID
] = "task.ppid",
83 [TOMOYO_EXEC_ARGC
] = "exec.argc",
84 [TOMOYO_EXEC_ENVC
] = "exec.envc",
85 [TOMOYO_TYPE_IS_SOCKET
] = "socket",
86 [TOMOYO_TYPE_IS_SYMLINK
] = "symlink",
87 [TOMOYO_TYPE_IS_FILE
] = "file",
88 [TOMOYO_TYPE_IS_BLOCK_DEV
] = "block",
89 [TOMOYO_TYPE_IS_DIRECTORY
] = "directory",
90 [TOMOYO_TYPE_IS_CHAR_DEV
] = "char",
91 [TOMOYO_TYPE_IS_FIFO
] = "fifo",
92 [TOMOYO_MODE_SETUID
] = "setuid",
93 [TOMOYO_MODE_SETGID
] = "setgid",
94 [TOMOYO_MODE_STICKY
] = "sticky",
95 [TOMOYO_MODE_OWNER_READ
] = "owner_read",
96 [TOMOYO_MODE_OWNER_WRITE
] = "owner_write",
97 [TOMOYO_MODE_OWNER_EXECUTE
] = "owner_execute",
98 [TOMOYO_MODE_GROUP_READ
] = "group_read",
99 [TOMOYO_MODE_GROUP_WRITE
] = "group_write",
100 [TOMOYO_MODE_GROUP_EXECUTE
] = "group_execute",
101 [TOMOYO_MODE_OTHERS_READ
] = "others_read",
102 [TOMOYO_MODE_OTHERS_WRITE
] = "others_write",
103 [TOMOYO_MODE_OTHERS_EXECUTE
] = "others_execute",
104 [TOMOYO_EXEC_REALPATH
] = "exec.realpath",
105 [TOMOYO_SYMLINK_TARGET
] = "symlink.target",
106 [TOMOYO_PATH1_UID
] = "path1.uid",
107 [TOMOYO_PATH1_GID
] = "path1.gid",
108 [TOMOYO_PATH1_INO
] = "path1.ino",
109 [TOMOYO_PATH1_MAJOR
] = "path1.major",
110 [TOMOYO_PATH1_MINOR
] = "path1.minor",
111 [TOMOYO_PATH1_PERM
] = "path1.perm",
112 [TOMOYO_PATH1_TYPE
] = "path1.type",
113 [TOMOYO_PATH1_DEV_MAJOR
] = "path1.dev_major",
114 [TOMOYO_PATH1_DEV_MINOR
] = "path1.dev_minor",
115 [TOMOYO_PATH2_UID
] = "path2.uid",
116 [TOMOYO_PATH2_GID
] = "path2.gid",
117 [TOMOYO_PATH2_INO
] = "path2.ino",
118 [TOMOYO_PATH2_MAJOR
] = "path2.major",
119 [TOMOYO_PATH2_MINOR
] = "path2.minor",
120 [TOMOYO_PATH2_PERM
] = "path2.perm",
121 [TOMOYO_PATH2_TYPE
] = "path2.type",
122 [TOMOYO_PATH2_DEV_MAJOR
] = "path2.dev_major",
123 [TOMOYO_PATH2_DEV_MINOR
] = "path2.dev_minor",
124 [TOMOYO_PATH1_PARENT_UID
] = "path1.parent.uid",
125 [TOMOYO_PATH1_PARENT_GID
] = "path1.parent.gid",
126 [TOMOYO_PATH1_PARENT_INO
] = "path1.parent.ino",
127 [TOMOYO_PATH1_PARENT_PERM
] = "path1.parent.perm",
128 [TOMOYO_PATH2_PARENT_UID
] = "path2.parent.uid",
129 [TOMOYO_PATH2_PARENT_GID
] = "path2.parent.gid",
130 [TOMOYO_PATH2_PARENT_INO
] = "path2.parent.ino",
131 [TOMOYO_PATH2_PARENT_PERM
] = "path2.parent.perm",
134 /* String table for PREFERENCE keyword. */
135 static const char * const tomoyo_pref_keywords
[TOMOYO_MAX_PREF
] = {
136 [TOMOYO_PREF_MAX_AUDIT_LOG
] = "max_audit_log",
137 [TOMOYO_PREF_MAX_LEARNING_ENTRY
] = "max_learning_entry",
140 /* String table for path operation. */
141 const char * const tomoyo_path_keyword
[TOMOYO_MAX_PATH_OPERATION
] = {
142 [TOMOYO_TYPE_EXECUTE
] = "execute",
143 [TOMOYO_TYPE_READ
] = "read",
144 [TOMOYO_TYPE_WRITE
] = "write",
145 [TOMOYO_TYPE_APPEND
] = "append",
146 [TOMOYO_TYPE_UNLINK
] = "unlink",
147 [TOMOYO_TYPE_GETATTR
] = "getattr",
148 [TOMOYO_TYPE_RMDIR
] = "rmdir",
149 [TOMOYO_TYPE_TRUNCATE
] = "truncate",
150 [TOMOYO_TYPE_SYMLINK
] = "symlink",
151 [TOMOYO_TYPE_CHROOT
] = "chroot",
152 [TOMOYO_TYPE_UMOUNT
] = "unmount",
155 /* String table for socket's operation. */
156 const char * const tomoyo_socket_keyword
[TOMOYO_MAX_NETWORK_OPERATION
] = {
157 [TOMOYO_NETWORK_BIND
] = "bind",
158 [TOMOYO_NETWORK_LISTEN
] = "listen",
159 [TOMOYO_NETWORK_CONNECT
] = "connect",
160 [TOMOYO_NETWORK_SEND
] = "send",
163 /* String table for categories. */
164 static const char * const tomoyo_category_keywords
165 [TOMOYO_MAX_MAC_CATEGORY_INDEX
] = {
166 [TOMOYO_MAC_CATEGORY_FILE
] = "file",
167 [TOMOYO_MAC_CATEGORY_NETWORK
] = "network",
168 [TOMOYO_MAC_CATEGORY_MISC
] = "misc",
171 /* Permit policy management by non-root user? */
172 static bool tomoyo_manage_by_non_root
;
174 /* Utility functions. */
177 * tomoyo_yesno - Return "yes" or "no".
179 * @value: Bool value.
181 const char *tomoyo_yesno(const unsigned int value
)
183 return value
? "yes" : "no";
187 * tomoyo_addprintf - strncat()-like-snprintf().
189 * @buffer: Buffer to write to. Must be '\0'-terminated.
190 * @len: Size of @buffer.
191 * @fmt: The printf()'s format string, followed by parameters.
195 static void tomoyo_addprintf(char *buffer
, int len
, const char *fmt
, ...)
198 const int pos
= strlen(buffer
);
200 vsnprintf(buffer
+ pos
, len
- pos
- 1, fmt
, args
);
205 * tomoyo_flush - Flush queued string to userspace's buffer.
207 * @head: Pointer to "struct tomoyo_io_buffer".
209 * Returns true if all data was flushed, false otherwise.
211 static bool tomoyo_flush(struct tomoyo_io_buffer
*head
)
213 while (head
->r
.w_pos
) {
214 const char *w
= head
->r
.w
[0];
215 size_t len
= strlen(w
);
217 if (len
> head
->read_user_buf_avail
)
218 len
= head
->read_user_buf_avail
;
221 if (copy_to_user(head
->read_user_buf
, w
, len
))
223 head
->read_user_buf_avail
-= len
;
224 head
->read_user_buf
+= len
;
230 /* Add '\0' for audit logs and query. */
232 if (!head
->read_user_buf_avail
||
233 copy_to_user(head
->read_user_buf
, "", 1))
235 head
->read_user_buf_avail
--;
236 head
->read_user_buf
++;
239 for (len
= 0; len
< head
->r
.w_pos
; len
++)
240 head
->r
.w
[len
] = head
->r
.w
[len
+ 1];
247 * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure.
249 * @head: Pointer to "struct tomoyo_io_buffer".
250 * @string: String to print.
252 * Note that @string has to be kept valid until @head is kfree()d.
253 * This means that char[] allocated on stack memory cannot be passed to
254 * this function. Use tomoyo_io_printf() for char[] allocated on stack memory.
256 static void tomoyo_set_string(struct tomoyo_io_buffer
*head
, const char *string
)
258 if (head
->r
.w_pos
< TOMOYO_MAX_IO_READ_QUEUE
) {
259 head
->r
.w
[head
->r
.w_pos
++] = string
;
265 static void tomoyo_io_printf(struct tomoyo_io_buffer
*head
, const char *fmt
,
269 * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure.
271 * @head: Pointer to "struct tomoyo_io_buffer".
272 * @fmt: The printf()'s format string, followed by parameters.
274 static void tomoyo_io_printf(struct tomoyo_io_buffer
*head
, const char *fmt
,
279 size_t pos
= head
->r
.avail
;
280 int size
= head
->readbuf_size
- pos
;
284 len
= vsnprintf(head
->read_buf
+ pos
, size
, fmt
, args
) + 1;
286 if (pos
+ len
>= head
->readbuf_size
) {
290 head
->r
.avail
+= len
;
291 tomoyo_set_string(head
, head
->read_buf
+ pos
);
295 * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure.
297 * @head: Pointer to "struct tomoyo_io_buffer".
301 static void tomoyo_set_space(struct tomoyo_io_buffer
*head
)
303 tomoyo_set_string(head
, " ");
307 * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure.
309 * @head: Pointer to "struct tomoyo_io_buffer".
313 static bool tomoyo_set_lf(struct tomoyo_io_buffer
*head
)
315 tomoyo_set_string(head
, "\n");
316 return !head
->r
.w_pos
;
320 * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure.
322 * @head: Pointer to "struct tomoyo_io_buffer".
326 static void tomoyo_set_slash(struct tomoyo_io_buffer
*head
)
328 tomoyo_set_string(head
, "/");
331 /* List of namespaces. */
332 LIST_HEAD(tomoyo_namespace_list
);
333 /* True if namespace other than tomoyo_kernel_namespace is defined. */
334 static bool tomoyo_namespace_enabled
;
337 * tomoyo_init_policy_namespace - Initialize namespace.
339 * @ns: Pointer to "struct tomoyo_policy_namespace".
343 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace
*ns
)
346 for (idx
= 0; idx
< TOMOYO_MAX_ACL_GROUPS
; idx
++)
347 INIT_LIST_HEAD(&ns
->acl_group
[idx
]);
348 for (idx
= 0; idx
< TOMOYO_MAX_GROUP
; idx
++)
349 INIT_LIST_HEAD(&ns
->group_list
[idx
]);
350 for (idx
= 0; idx
< TOMOYO_MAX_POLICY
; idx
++)
351 INIT_LIST_HEAD(&ns
->policy_list
[idx
]);
352 ns
->profile_version
= 20110903;
353 tomoyo_namespace_enabled
= !list_empty(&tomoyo_namespace_list
);
354 list_add_tail_rcu(&ns
->namespace_list
, &tomoyo_namespace_list
);
358 * tomoyo_print_namespace - Print namespace header.
360 * @head: Pointer to "struct tomoyo_io_buffer".
364 static void tomoyo_print_namespace(struct tomoyo_io_buffer
*head
)
366 if (!tomoyo_namespace_enabled
)
368 tomoyo_set_string(head
,
369 container_of(head
->r
.ns
,
370 struct tomoyo_policy_namespace
,
371 namespace_list
)->name
);
372 tomoyo_set_space(head
);
376 * tomoyo_print_name_union - Print a tomoyo_name_union.
378 * @head: Pointer to "struct tomoyo_io_buffer".
379 * @ptr: Pointer to "struct tomoyo_name_union".
381 static void tomoyo_print_name_union(struct tomoyo_io_buffer
*head
,
382 const struct tomoyo_name_union
*ptr
)
384 tomoyo_set_space(head
);
386 tomoyo_set_string(head
, "@");
387 tomoyo_set_string(head
, ptr
->group
->group_name
->name
);
389 tomoyo_set_string(head
, ptr
->filename
->name
);
394 * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote.
396 * @head: Pointer to "struct tomoyo_io_buffer".
397 * @ptr: Pointer to "struct tomoyo_name_union".
401 static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer
*head
,
402 const struct tomoyo_name_union
*ptr
)
405 tomoyo_set_string(head
, "@");
406 tomoyo_set_string(head
, ptr
->group
->group_name
->name
);
408 tomoyo_set_string(head
, "\"");
409 tomoyo_set_string(head
, ptr
->filename
->name
);
410 tomoyo_set_string(head
, "\"");
415 * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space.
417 * @head: Pointer to "struct tomoyo_io_buffer".
418 * @ptr: Pointer to "struct tomoyo_number_union".
422 static void tomoyo_print_number_union_nospace
423 (struct tomoyo_io_buffer
*head
, const struct tomoyo_number_union
*ptr
)
426 tomoyo_set_string(head
, "@");
427 tomoyo_set_string(head
, ptr
->group
->group_name
->name
);
430 unsigned long min
= ptr
->values
[0];
431 const unsigned long max
= ptr
->values
[1];
432 u8 min_type
= ptr
->value_type
[0];
433 const u8 max_type
= ptr
->value_type
[1];
436 for (i
= 0; i
< 2; i
++) {
438 case TOMOYO_VALUE_TYPE_HEXADECIMAL
:
439 tomoyo_addprintf(buffer
, sizeof(buffer
),
442 case TOMOYO_VALUE_TYPE_OCTAL
:
443 tomoyo_addprintf(buffer
, sizeof(buffer
),
447 tomoyo_addprintf(buffer
, sizeof(buffer
), "%lu",
451 if (min
== max
&& min_type
== max_type
)
453 tomoyo_addprintf(buffer
, sizeof(buffer
), "-");
457 tomoyo_io_printf(head
, "%s", buffer
);
462 * tomoyo_print_number_union - Print a tomoyo_number_union.
464 * @head: Pointer to "struct tomoyo_io_buffer".
465 * @ptr: Pointer to "struct tomoyo_number_union".
469 static void tomoyo_print_number_union(struct tomoyo_io_buffer
*head
,
470 const struct tomoyo_number_union
*ptr
)
472 tomoyo_set_space(head
);
473 tomoyo_print_number_union_nospace(head
, ptr
);
477 * tomoyo_assign_profile - Create a new profile.
479 * @ns: Pointer to "struct tomoyo_policy_namespace".
480 * @profile: Profile number to create.
482 * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
484 static struct tomoyo_profile
*tomoyo_assign_profile
485 (struct tomoyo_policy_namespace
*ns
, const unsigned int profile
)
487 struct tomoyo_profile
*ptr
;
488 struct tomoyo_profile
*entry
;
489 if (profile
>= TOMOYO_MAX_PROFILES
)
491 ptr
= ns
->profile_ptr
[profile
];
494 entry
= kzalloc(sizeof(*entry
), GFP_NOFS
);
495 if (mutex_lock_interruptible(&tomoyo_policy_lock
))
497 ptr
= ns
->profile_ptr
[profile
];
498 if (!ptr
&& tomoyo_memory_ok(entry
)) {
500 ptr
->default_config
= TOMOYO_CONFIG_DISABLED
|
501 TOMOYO_CONFIG_WANT_GRANT_LOG
|
502 TOMOYO_CONFIG_WANT_REJECT_LOG
;
503 memset(ptr
->config
, TOMOYO_CONFIG_USE_DEFAULT
,
504 sizeof(ptr
->config
));
505 ptr
->pref
[TOMOYO_PREF_MAX_AUDIT_LOG
] =
506 CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG
;
507 ptr
->pref
[TOMOYO_PREF_MAX_LEARNING_ENTRY
] =
508 CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY
;
509 mb(); /* Avoid out-of-order execution. */
510 ns
->profile_ptr
[profile
] = ptr
;
513 mutex_unlock(&tomoyo_policy_lock
);
520 * tomoyo_profile - Find a profile.
522 * @ns: Pointer to "struct tomoyo_policy_namespace".
523 * @profile: Profile number to find.
525 * Returns pointer to "struct tomoyo_profile".
527 struct tomoyo_profile
*tomoyo_profile(const struct tomoyo_policy_namespace
*ns
,
530 static struct tomoyo_profile tomoyo_null_profile
;
531 struct tomoyo_profile
*ptr
= ns
->profile_ptr
[profile
];
533 ptr
= &tomoyo_null_profile
;
538 * tomoyo_find_yesno - Find values for specified keyword.
540 * @string: String to check.
541 * @find: Name of keyword.
543 * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
545 static s8
tomoyo_find_yesno(const char *string
, const char *find
)
547 const char *cp
= strstr(string
, find
);
550 if (!strncmp(cp
, "=yes", 4))
552 else if (!strncmp(cp
, "=no", 3))
559 * tomoyo_set_uint - Set value for specified preference.
561 * @i: Pointer to "unsigned int".
562 * @string: String to check.
563 * @find: Name of keyword.
567 static void tomoyo_set_uint(unsigned int *i
, const char *string
,
570 const char *cp
= strstr(string
, find
);
572 sscanf(cp
+ strlen(find
), "=%u", i
);
576 * tomoyo_set_mode - Set mode for specified profile.
578 * @name: Name of functionality.
579 * @value: Mode for @name.
580 * @profile: Pointer to "struct tomoyo_profile".
582 * Returns 0 on success, negative value otherwise.
584 static int tomoyo_set_mode(char *name
, const char *value
,
585 struct tomoyo_profile
*profile
)
589 if (!strcmp(name
, "CONFIG")) {
590 i
= TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
;
591 config
= profile
->default_config
;
592 } else if (tomoyo_str_starts(&name
, "CONFIG::")) {
594 for (i
= 0; i
< TOMOYO_MAX_MAC_INDEX
595 + TOMOYO_MAX_MAC_CATEGORY_INDEX
; i
++) {
597 if (i
< TOMOYO_MAX_MAC_INDEX
) {
598 const u8 c
= tomoyo_index2category
[i
];
599 const char *category
=
600 tomoyo_category_keywords
[c
];
601 len
= strlen(category
);
602 if (strncmp(name
, category
, len
) ||
603 name
[len
++] != ':' || name
[len
++] != ':')
606 if (strcmp(name
+ len
, tomoyo_mac_keywords
[i
]))
608 config
= profile
->config
[i
];
611 if (i
== TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
)
616 if (strstr(value
, "use_default")) {
617 config
= TOMOYO_CONFIG_USE_DEFAULT
;
620 for (mode
= 0; mode
< 4; mode
++)
621 if (strstr(value
, tomoyo_mode
[mode
]))
623 * Update lower 3 bits in order to distinguish
624 * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
626 config
= (config
& ~7) | mode
;
627 if (config
!= TOMOYO_CONFIG_USE_DEFAULT
) {
628 switch (tomoyo_find_yesno(value
, "grant_log")) {
630 config
|= TOMOYO_CONFIG_WANT_GRANT_LOG
;
633 config
&= ~TOMOYO_CONFIG_WANT_GRANT_LOG
;
636 switch (tomoyo_find_yesno(value
, "reject_log")) {
638 config
|= TOMOYO_CONFIG_WANT_REJECT_LOG
;
641 config
&= ~TOMOYO_CONFIG_WANT_REJECT_LOG
;
646 if (i
< TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
)
647 profile
->config
[i
] = config
;
648 else if (config
!= TOMOYO_CONFIG_USE_DEFAULT
)
649 profile
->default_config
= config
;
654 * tomoyo_write_profile - Write profile table.
656 * @head: Pointer to "struct tomoyo_io_buffer".
658 * Returns 0 on success, negative value otherwise.
660 static int tomoyo_write_profile(struct tomoyo_io_buffer
*head
)
662 char *data
= head
->write_buf
;
665 struct tomoyo_profile
*profile
;
666 if (sscanf(data
, "PROFILE_VERSION=%u", &head
->w
.ns
->profile_version
)
669 i
= simple_strtoul(data
, &cp
, 10);
673 profile
= tomoyo_assign_profile(head
->w
.ns
, i
);
676 cp
= strchr(data
, '=');
680 if (!strcmp(data
, "COMMENT")) {
681 static DEFINE_SPINLOCK(lock
);
682 const struct tomoyo_path_info
*new_comment
683 = tomoyo_get_name(cp
);
684 const struct tomoyo_path_info
*old_comment
;
688 old_comment
= profile
->comment
;
689 profile
->comment
= new_comment
;
691 tomoyo_put_name(old_comment
);
694 if (!strcmp(data
, "PREFERENCE")) {
695 for (i
= 0; i
< TOMOYO_MAX_PREF
; i
++)
696 tomoyo_set_uint(&profile
->pref
[i
], cp
,
697 tomoyo_pref_keywords
[i
]);
700 return tomoyo_set_mode(data
, cp
, profile
);
704 * tomoyo_print_config - Print mode for specified functionality.
706 * @head: Pointer to "struct tomoyo_io_buffer".
707 * @config: Mode for that functionality.
711 * Caller prints functionality's name.
713 static void tomoyo_print_config(struct tomoyo_io_buffer
*head
, const u8 config
)
715 tomoyo_io_printf(head
, "={ mode=%s grant_log=%s reject_log=%s }\n",
716 tomoyo_mode
[config
& 3],
717 tomoyo_yesno(config
& TOMOYO_CONFIG_WANT_GRANT_LOG
),
718 tomoyo_yesno(config
& TOMOYO_CONFIG_WANT_REJECT_LOG
));
722 * tomoyo_read_profile - Read profile table.
724 * @head: Pointer to "struct tomoyo_io_buffer".
728 static void tomoyo_read_profile(struct tomoyo_io_buffer
*head
)
731 struct tomoyo_policy_namespace
*ns
=
732 container_of(head
->r
.ns
, typeof(*ns
), namespace_list
);
733 const struct tomoyo_profile
*profile
;
737 index
= head
->r
.index
;
738 profile
= ns
->profile_ptr
[index
];
739 switch (head
->r
.step
) {
741 tomoyo_print_namespace(head
);
742 tomoyo_io_printf(head
, "PROFILE_VERSION=%u\n",
743 ns
->profile_version
);
747 for ( ; head
->r
.index
< TOMOYO_MAX_PROFILES
;
749 if (ns
->profile_ptr
[head
->r
.index
])
751 if (head
->r
.index
== TOMOYO_MAX_PROFILES
) {
760 const struct tomoyo_path_info
*comment
=
762 tomoyo_print_namespace(head
);
763 tomoyo_io_printf(head
, "%u-COMMENT=", index
);
764 tomoyo_set_string(head
, comment
? comment
->name
: "");
766 tomoyo_print_namespace(head
);
767 tomoyo_io_printf(head
, "%u-PREFERENCE={ ", index
);
768 for (i
= 0; i
< TOMOYO_MAX_PREF
; i
++)
769 tomoyo_io_printf(head
, "%s=%u ",
770 tomoyo_pref_keywords
[i
],
772 tomoyo_set_string(head
, "}\n");
778 tomoyo_print_namespace(head
);
779 tomoyo_io_printf(head
, "%u-%s", index
, "CONFIG");
780 tomoyo_print_config(head
, profile
->default_config
);
786 for ( ; head
->r
.bit
< TOMOYO_MAX_MAC_INDEX
787 + TOMOYO_MAX_MAC_CATEGORY_INDEX
; head
->r
.bit
++) {
788 const u8 i
= head
->r
.bit
;
789 const u8 config
= profile
->config
[i
];
790 if (config
== TOMOYO_CONFIG_USE_DEFAULT
)
792 tomoyo_print_namespace(head
);
793 if (i
< TOMOYO_MAX_MAC_INDEX
)
794 tomoyo_io_printf(head
, "%u-CONFIG::%s::%s",
796 tomoyo_category_keywords
797 [tomoyo_index2category
[i
]],
798 tomoyo_mac_keywords
[i
]);
800 tomoyo_io_printf(head
, "%u-CONFIG::%s", index
,
801 tomoyo_mac_keywords
[i
]);
802 tomoyo_print_config(head
, config
);
806 if (head
->r
.bit
== TOMOYO_MAX_MAC_INDEX
807 + TOMOYO_MAX_MAC_CATEGORY_INDEX
) {
813 if (tomoyo_flush(head
))
818 * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry.
820 * @a: Pointer to "struct tomoyo_acl_head".
821 * @b: Pointer to "struct tomoyo_acl_head".
823 * Returns true if @a == @b, false otherwise.
825 static bool tomoyo_same_manager(const struct tomoyo_acl_head
*a
,
826 const struct tomoyo_acl_head
*b
)
828 return container_of(a
, struct tomoyo_manager
, head
)->manager
==
829 container_of(b
, struct tomoyo_manager
, head
)->manager
;
833 * tomoyo_update_manager_entry - Add a manager entry.
835 * @manager: The path to manager or the domainnamme.
836 * @is_delete: True if it is a delete request.
838 * Returns 0 on success, negative value otherwise.
840 * Caller holds tomoyo_read_lock().
842 static int tomoyo_update_manager_entry(const char *manager
,
843 const bool is_delete
)
845 struct tomoyo_manager e
= { };
846 struct tomoyo_acl_param param
= {
847 /* .ns = &tomoyo_kernel_namespace, */
848 .is_delete
= is_delete
,
849 .list
= &tomoyo_kernel_namespace
.
850 policy_list
[TOMOYO_ID_MANAGER
],
852 int error
= is_delete
? -ENOENT
: -ENOMEM
;
853 if (tomoyo_domain_def(manager
)) {
854 if (!tomoyo_correct_domain(manager
))
858 if (!tomoyo_correct_path(manager
))
861 e
.manager
= tomoyo_get_name(manager
);
863 error
= tomoyo_update_policy(&e
.head
, sizeof(e
), ¶m
,
864 tomoyo_same_manager
);
865 tomoyo_put_name(e
.manager
);
871 * tomoyo_write_manager - Write manager policy.
873 * @head: Pointer to "struct tomoyo_io_buffer".
875 * Returns 0 on success, negative value otherwise.
877 * Caller holds tomoyo_read_lock().
879 static int tomoyo_write_manager(struct tomoyo_io_buffer
*head
)
881 char *data
= head
->write_buf
;
883 if (!strcmp(data
, "manage_by_non_root")) {
884 tomoyo_manage_by_non_root
= !head
->w
.is_delete
;
887 return tomoyo_update_manager_entry(data
, head
->w
.is_delete
);
891 * tomoyo_read_manager - Read manager policy.
893 * @head: Pointer to "struct tomoyo_io_buffer".
895 * Caller holds tomoyo_read_lock().
897 static void tomoyo_read_manager(struct tomoyo_io_buffer
*head
)
901 list_for_each_cookie(head
->r
.acl
, &tomoyo_kernel_namespace
.
902 policy_list
[TOMOYO_ID_MANAGER
]) {
903 struct tomoyo_manager
*ptr
=
904 list_entry(head
->r
.acl
, typeof(*ptr
), head
.list
);
905 if (ptr
->head
.is_deleted
)
907 if (!tomoyo_flush(head
))
909 tomoyo_set_string(head
, ptr
->manager
->name
);
916 * tomoyo_manager - Check whether the current process is a policy manager.
918 * Returns true if the current process is permitted to modify policy
919 * via /sys/kernel/security/tomoyo/ interface.
921 * Caller holds tomoyo_read_lock().
923 static bool tomoyo_manager(void)
925 struct tomoyo_manager
*ptr
;
927 const struct task_struct
*task
= current
;
928 const struct tomoyo_path_info
*domainname
= tomoyo_domain()->domainname
;
931 if (!tomoyo_policy_loaded
)
933 if (!tomoyo_manage_by_non_root
&& (task
->cred
->uid
|| task
->cred
->euid
))
935 list_for_each_entry_rcu(ptr
, &tomoyo_kernel_namespace
.
936 policy_list
[TOMOYO_ID_MANAGER
], head
.list
) {
937 if (!ptr
->head
.is_deleted
&& ptr
->is_domain
938 && !tomoyo_pathcmp(domainname
, ptr
->manager
)) {
945 exe
= tomoyo_get_exe();
948 list_for_each_entry_rcu(ptr
, &tomoyo_kernel_namespace
.
949 policy_list
[TOMOYO_ID_MANAGER
], head
.list
) {
950 if (!ptr
->head
.is_deleted
&& !ptr
->is_domain
951 && !strcmp(exe
, ptr
->manager
->name
)) {
956 if (!found
) { /* Reduce error messages. */
957 static pid_t last_pid
;
958 const pid_t pid
= current
->pid
;
959 if (last_pid
!= pid
) {
960 printk(KERN_WARNING
"%s ( %s ) is not permitted to "
961 "update policies.\n", domainname
->name
, exe
);
969 static struct tomoyo_domain_info
*tomoyo_find_domain_by_qid
970 (unsigned int serial
);
973 * tomoyo_select_domain - Parse select command.
975 * @head: Pointer to "struct tomoyo_io_buffer".
976 * @data: String to parse.
978 * Returns true on success, false otherwise.
980 * Caller holds tomoyo_read_lock().
982 static bool tomoyo_select_domain(struct tomoyo_io_buffer
*head
,
986 struct tomoyo_domain_info
*domain
= NULL
;
987 bool global_pid
= false;
988 if (strncmp(data
, "select ", 7))
991 if (sscanf(data
, "pid=%u", &pid
) == 1 ||
992 (global_pid
= true, sscanf(data
, "global-pid=%u", &pid
) == 1)) {
993 struct task_struct
*p
;
996 p
= find_task_by_pid_ns(pid
, &init_pid_ns
);
998 p
= find_task_by_vpid(pid
);
1000 domain
= tomoyo_real_domain(p
);
1002 } else if (!strncmp(data
, "domain=", 7)) {
1003 if (tomoyo_domain_def(data
+ 7))
1004 domain
= tomoyo_find_domain(data
+ 7);
1005 } else if (sscanf(data
, "Q=%u", &pid
) == 1) {
1006 domain
= tomoyo_find_domain_by_qid(pid
);
1009 head
->w
.domain
= domain
;
1010 /* Accessing read_buf is safe because head->io_sem is held. */
1011 if (!head
->read_buf
)
1012 return true; /* Do nothing if open(O_WRONLY). */
1013 memset(&head
->r
, 0, sizeof(head
->r
));
1014 head
->r
.print_this_domain_only
= true;
1016 head
->r
.domain
= &domain
->list
;
1019 tomoyo_io_printf(head
, "# select %s\n", data
);
1020 if (domain
&& domain
->is_deleted
)
1021 tomoyo_io_printf(head
, "# This is a deleted domain.\n");
1026 * tomoyo_same_task_acl - Check for duplicated "struct tomoyo_task_acl" entry.
1028 * @a: Pointer to "struct tomoyo_acl_info".
1029 * @b: Pointer to "struct tomoyo_acl_info".
1031 * Returns true if @a == @b, false otherwise.
1033 static bool tomoyo_same_task_acl(const struct tomoyo_acl_info
*a
,
1034 const struct tomoyo_acl_info
*b
)
1036 const struct tomoyo_task_acl
*p1
= container_of(a
, typeof(*p1
), head
);
1037 const struct tomoyo_task_acl
*p2
= container_of(b
, typeof(*p2
), head
);
1038 return p1
->domainname
== p2
->domainname
;
1042 * tomoyo_write_task - Update task related list.
1044 * @param: Pointer to "struct tomoyo_acl_param".
1046 * Returns 0 on success, negative value otherwise.
1048 * Caller holds tomoyo_read_lock().
1050 static int tomoyo_write_task(struct tomoyo_acl_param
*param
)
1052 int error
= -EINVAL
;
1053 if (tomoyo_str_starts(¶m
->data
, "manual_domain_transition ")) {
1054 struct tomoyo_task_acl e
= {
1055 .head
.type
= TOMOYO_TYPE_MANUAL_TASK_ACL
,
1056 .domainname
= tomoyo_get_domainname(param
),
1059 error
= tomoyo_update_domain(&e
.head
, sizeof(e
), param
,
1060 tomoyo_same_task_acl
,
1062 tomoyo_put_name(e
.domainname
);
1068 * tomoyo_delete_domain - Delete a domain.
1070 * @domainname: The name of domain.
1072 * Returns 0 on success, negative value otherwise.
1074 * Caller holds tomoyo_read_lock().
1076 static int tomoyo_delete_domain(char *domainname
)
1078 struct tomoyo_domain_info
*domain
;
1079 struct tomoyo_path_info name
;
1081 name
.name
= domainname
;
1082 tomoyo_fill_path_info(&name
);
1083 if (mutex_lock_interruptible(&tomoyo_policy_lock
))
1085 /* Is there an active domain? */
1086 list_for_each_entry_rcu(domain
, &tomoyo_domain_list
, list
) {
1087 /* Never delete tomoyo_kernel_domain */
1088 if (domain
== &tomoyo_kernel_domain
)
1090 if (domain
->is_deleted
||
1091 tomoyo_pathcmp(domain
->domainname
, &name
))
1093 domain
->is_deleted
= true;
1096 mutex_unlock(&tomoyo_policy_lock
);
1101 * tomoyo_write_domain2 - Write domain policy.
1103 * @ns: Pointer to "struct tomoyo_policy_namespace".
1104 * @list: Pointer to "struct list_head".
1105 * @data: Policy to be interpreted.
1106 * @is_delete: True if it is a delete request.
1108 * Returns 0 on success, negative value otherwise.
1110 * Caller holds tomoyo_read_lock().
1112 static int tomoyo_write_domain2(struct tomoyo_policy_namespace
*ns
,
1113 struct list_head
*list
, char *data
,
1114 const bool is_delete
)
1116 struct tomoyo_acl_param param
= {
1120 .is_delete
= is_delete
,
1122 static const struct {
1123 const char *keyword
;
1124 int (*write
) (struct tomoyo_acl_param
*);
1125 } tomoyo_callback
[5] = {
1126 { "file ", tomoyo_write_file
},
1127 { "network inet ", tomoyo_write_inet_network
},
1128 { "network unix ", tomoyo_write_unix_network
},
1129 { "misc ", tomoyo_write_misc
},
1130 { "task ", tomoyo_write_task
},
1134 for (i
= 0; i
< ARRAY_SIZE(tomoyo_callback
); i
++) {
1135 if (!tomoyo_str_starts(¶m
.data
,
1136 tomoyo_callback
[i
].keyword
))
1138 return tomoyo_callback
[i
].write(¶m
);
1143 /* String table for domain flags. */
1144 const char * const tomoyo_dif
[TOMOYO_MAX_DOMAIN_INFO_FLAGS
] = {
1145 [TOMOYO_DIF_QUOTA_WARNED
] = "quota_exceeded\n",
1146 [TOMOYO_DIF_TRANSITION_FAILED
] = "transition_failed\n",
1150 * tomoyo_write_domain - Write domain policy.
1152 * @head: Pointer to "struct tomoyo_io_buffer".
1154 * Returns 0 on success, negative value otherwise.
1156 * Caller holds tomoyo_read_lock().
1158 static int tomoyo_write_domain(struct tomoyo_io_buffer
*head
)
1160 char *data
= head
->write_buf
;
1161 struct tomoyo_policy_namespace
*ns
;
1162 struct tomoyo_domain_info
*domain
= head
->w
.domain
;
1163 const bool is_delete
= head
->w
.is_delete
;
1164 bool is_select
= !is_delete
&& tomoyo_str_starts(&data
, "select ");
1165 unsigned int profile
;
1170 ret
= tomoyo_delete_domain(data
);
1172 domain
= tomoyo_find_domain(data
);
1174 domain
= tomoyo_assign_domain(data
, false);
1175 head
->w
.domain
= domain
;
1181 if (sscanf(data
, "use_profile %u", &profile
) == 1
1182 && profile
< TOMOYO_MAX_PROFILES
) {
1183 if (!tomoyo_policy_loaded
|| ns
->profile_ptr
[profile
])
1184 domain
->profile
= (u8
) profile
;
1187 if (sscanf(data
, "use_group %u\n", &profile
) == 1
1188 && profile
< TOMOYO_MAX_ACL_GROUPS
) {
1190 domain
->group
= (u8
) profile
;
1193 for (profile
= 0; profile
< TOMOYO_MAX_DOMAIN_INFO_FLAGS
; profile
++) {
1194 const char *cp
= tomoyo_dif
[profile
];
1195 if (strncmp(data
, cp
, strlen(cp
) - 1))
1197 domain
->flags
[profile
] = !is_delete
;
1200 return tomoyo_write_domain2(ns
, &domain
->acl_info_list
, data
,
1205 * tomoyo_print_condition - Print condition part.
1207 * @head: Pointer to "struct tomoyo_io_buffer".
1208 * @cond: Pointer to "struct tomoyo_condition".
1210 * Returns true on success, false otherwise.
1212 static bool tomoyo_print_condition(struct tomoyo_io_buffer
*head
,
1213 const struct tomoyo_condition
*cond
)
1215 switch (head
->r
.cond_step
) {
1217 head
->r
.cond_index
= 0;
1218 head
->r
.cond_step
++;
1219 if (cond
->transit
) {
1220 tomoyo_set_space(head
);
1221 tomoyo_set_string(head
, cond
->transit
->name
);
1226 const u16 condc
= cond
->condc
;
1227 const struct tomoyo_condition_element
*condp
=
1228 (typeof(condp
)) (cond
+ 1);
1229 const struct tomoyo_number_union
*numbers_p
=
1230 (typeof(numbers_p
)) (condp
+ condc
);
1231 const struct tomoyo_name_union
*names_p
=
1233 (numbers_p
+ cond
->numbers_count
);
1234 const struct tomoyo_argv
*argv
=
1235 (typeof(argv
)) (names_p
+ cond
->names_count
);
1236 const struct tomoyo_envp
*envp
=
1237 (typeof(envp
)) (argv
+ cond
->argc
);
1239 for (skip
= 0; skip
< head
->r
.cond_index
; skip
++) {
1240 const u8 left
= condp
->left
;
1241 const u8 right
= condp
->right
;
1244 case TOMOYO_ARGV_ENTRY
:
1247 case TOMOYO_ENVP_ENTRY
:
1250 case TOMOYO_NUMBER_UNION
:
1255 case TOMOYO_NAME_UNION
:
1258 case TOMOYO_NUMBER_UNION
:
1263 while (head
->r
.cond_index
< condc
) {
1264 const u8 match
= condp
->equals
;
1265 const u8 left
= condp
->left
;
1266 const u8 right
= condp
->right
;
1267 if (!tomoyo_flush(head
))
1270 head
->r
.cond_index
++;
1271 tomoyo_set_space(head
);
1273 case TOMOYO_ARGV_ENTRY
:
1274 tomoyo_io_printf(head
,
1275 "exec.argv[%lu]%s=\"",
1278 tomoyo_set_string(head
,
1280 tomoyo_set_string(head
, "\"");
1283 case TOMOYO_ENVP_ENTRY
:
1284 tomoyo_set_string(head
,
1286 tomoyo_set_string(head
,
1288 tomoyo_io_printf(head
, "\"]%s=", envp
->
1291 tomoyo_set_string(head
, "\"");
1292 tomoyo_set_string(head
, envp
->
1294 tomoyo_set_string(head
, "\"");
1296 tomoyo_set_string(head
,
1301 case TOMOYO_NUMBER_UNION
:
1302 tomoyo_print_number_union_nospace
1303 (head
, numbers_p
++);
1306 tomoyo_set_string(head
,
1307 tomoyo_condition_keyword
[left
]);
1310 tomoyo_set_string(head
, match
? "=" : "!=");
1312 case TOMOYO_NAME_UNION
:
1313 tomoyo_print_name_union_quoted
1316 case TOMOYO_NUMBER_UNION
:
1317 tomoyo_print_number_union_nospace
1318 (head
, numbers_p
++);
1321 tomoyo_set_string(head
,
1322 tomoyo_condition_keyword
[right
]);
1327 head
->r
.cond_step
++;
1330 if (!tomoyo_flush(head
))
1332 head
->r
.cond_step
++;
1335 if (cond
->grant_log
!= TOMOYO_GRANTLOG_AUTO
)
1336 tomoyo_io_printf(head
, " grant_log=%s",
1337 tomoyo_yesno(cond
->grant_log
==
1338 TOMOYO_GRANTLOG_YES
));
1339 tomoyo_set_lf(head
);
1346 * tomoyo_set_group - Print "acl_group " header keyword and category name.
1348 * @head: Pointer to "struct tomoyo_io_buffer".
1349 * @category: Category name.
1353 static void tomoyo_set_group(struct tomoyo_io_buffer
*head
,
1354 const char *category
)
1356 if (head
->type
== TOMOYO_EXCEPTIONPOLICY
) {
1357 tomoyo_print_namespace(head
);
1358 tomoyo_io_printf(head
, "acl_group %u ",
1359 head
->r
.acl_group_index
);
1361 tomoyo_set_string(head
, category
);
1365 * tomoyo_print_entry - Print an ACL entry.
1367 * @head: Pointer to "struct tomoyo_io_buffer".
1368 * @acl: Pointer to an ACL entry.
1370 * Returns true on success, false otherwise.
1372 static bool tomoyo_print_entry(struct tomoyo_io_buffer
*head
,
1373 struct tomoyo_acl_info
*acl
)
1375 const u8 acl_type
= acl
->type
;
1379 if (head
->r
.print_cond_part
)
1380 goto print_cond_part
;
1381 if (acl
->is_deleted
)
1383 if (!tomoyo_flush(head
))
1385 else if (acl_type
== TOMOYO_TYPE_PATH_ACL
) {
1386 struct tomoyo_path_acl
*ptr
=
1387 container_of(acl
, typeof(*ptr
), head
);
1388 const u16 perm
= ptr
->perm
;
1389 for (bit
= 0; bit
< TOMOYO_MAX_PATH_OPERATION
; bit
++) {
1390 if (!(perm
& (1 << bit
)))
1392 if (head
->r
.print_transition_related_only
&&
1393 bit
!= TOMOYO_TYPE_EXECUTE
)
1396 tomoyo_set_group(head
, "file ");
1399 tomoyo_set_slash(head
);
1401 tomoyo_set_string(head
, tomoyo_path_keyword
[bit
]);
1405 tomoyo_print_name_union(head
, &ptr
->name
);
1406 } else if (acl_type
== TOMOYO_TYPE_MANUAL_TASK_ACL
) {
1407 struct tomoyo_task_acl
*ptr
=
1408 container_of(acl
, typeof(*ptr
), head
);
1409 tomoyo_set_group(head
, "task ");
1410 tomoyo_set_string(head
, "manual_domain_transition ");
1411 tomoyo_set_string(head
, ptr
->domainname
->name
);
1412 } else if (head
->r
.print_transition_related_only
) {
1414 } else if (acl_type
== TOMOYO_TYPE_PATH2_ACL
) {
1415 struct tomoyo_path2_acl
*ptr
=
1416 container_of(acl
, typeof(*ptr
), head
);
1417 const u8 perm
= ptr
->perm
;
1418 for (bit
= 0; bit
< TOMOYO_MAX_PATH2_OPERATION
; bit
++) {
1419 if (!(perm
& (1 << bit
)))
1422 tomoyo_set_group(head
, "file ");
1425 tomoyo_set_slash(head
);
1427 tomoyo_set_string(head
, tomoyo_mac_keywords
1428 [tomoyo_pp2mac
[bit
]]);
1432 tomoyo_print_name_union(head
, &ptr
->name1
);
1433 tomoyo_print_name_union(head
, &ptr
->name2
);
1434 } else if (acl_type
== TOMOYO_TYPE_PATH_NUMBER_ACL
) {
1435 struct tomoyo_path_number_acl
*ptr
=
1436 container_of(acl
, typeof(*ptr
), head
);
1437 const u8 perm
= ptr
->perm
;
1438 for (bit
= 0; bit
< TOMOYO_MAX_PATH_NUMBER_OPERATION
; bit
++) {
1439 if (!(perm
& (1 << bit
)))
1442 tomoyo_set_group(head
, "file ");
1445 tomoyo_set_slash(head
);
1447 tomoyo_set_string(head
, tomoyo_mac_keywords
1448 [tomoyo_pn2mac
[bit
]]);
1452 tomoyo_print_name_union(head
, &ptr
->name
);
1453 tomoyo_print_number_union(head
, &ptr
->number
);
1454 } else if (acl_type
== TOMOYO_TYPE_MKDEV_ACL
) {
1455 struct tomoyo_mkdev_acl
*ptr
=
1456 container_of(acl
, typeof(*ptr
), head
);
1457 const u8 perm
= ptr
->perm
;
1458 for (bit
= 0; bit
< TOMOYO_MAX_MKDEV_OPERATION
; bit
++) {
1459 if (!(perm
& (1 << bit
)))
1462 tomoyo_set_group(head
, "file ");
1465 tomoyo_set_slash(head
);
1467 tomoyo_set_string(head
, tomoyo_mac_keywords
1468 [tomoyo_pnnn2mac
[bit
]]);
1472 tomoyo_print_name_union(head
, &ptr
->name
);
1473 tomoyo_print_number_union(head
, &ptr
->mode
);
1474 tomoyo_print_number_union(head
, &ptr
->major
);
1475 tomoyo_print_number_union(head
, &ptr
->minor
);
1476 } else if (acl_type
== TOMOYO_TYPE_INET_ACL
) {
1477 struct tomoyo_inet_acl
*ptr
=
1478 container_of(acl
, typeof(*ptr
), head
);
1479 const u8 perm
= ptr
->perm
;
1481 for (bit
= 0; bit
< TOMOYO_MAX_NETWORK_OPERATION
; bit
++) {
1482 if (!(perm
& (1 << bit
)))
1485 tomoyo_set_group(head
, "network inet ");
1486 tomoyo_set_string(head
, tomoyo_proto_keyword
1488 tomoyo_set_space(head
);
1491 tomoyo_set_slash(head
);
1493 tomoyo_set_string(head
, tomoyo_socket_keyword
[bit
]);
1497 tomoyo_set_space(head
);
1498 if (ptr
->address
.group
) {
1499 tomoyo_set_string(head
, "@");
1500 tomoyo_set_string(head
, ptr
->address
.group
->group_name
1504 tomoyo_print_ip(buf
, sizeof(buf
), &ptr
->address
);
1505 tomoyo_io_printf(head
, "%s", buf
);
1507 tomoyo_print_number_union(head
, &ptr
->port
);
1508 } else if (acl_type
== TOMOYO_TYPE_UNIX_ACL
) {
1509 struct tomoyo_unix_acl
*ptr
=
1510 container_of(acl
, typeof(*ptr
), head
);
1511 const u8 perm
= ptr
->perm
;
1513 for (bit
= 0; bit
< TOMOYO_MAX_NETWORK_OPERATION
; bit
++) {
1514 if (!(perm
& (1 << bit
)))
1517 tomoyo_set_group(head
, "network unix ");
1518 tomoyo_set_string(head
, tomoyo_proto_keyword
1520 tomoyo_set_space(head
);
1523 tomoyo_set_slash(head
);
1525 tomoyo_set_string(head
, tomoyo_socket_keyword
[bit
]);
1529 tomoyo_print_name_union(head
, &ptr
->name
);
1530 } else if (acl_type
== TOMOYO_TYPE_MOUNT_ACL
) {
1531 struct tomoyo_mount_acl
*ptr
=
1532 container_of(acl
, typeof(*ptr
), head
);
1533 tomoyo_set_group(head
, "file mount");
1534 tomoyo_print_name_union(head
, &ptr
->dev_name
);
1535 tomoyo_print_name_union(head
, &ptr
->dir_name
);
1536 tomoyo_print_name_union(head
, &ptr
->fs_type
);
1537 tomoyo_print_number_union(head
, &ptr
->flags
);
1538 } else if (acl_type
== TOMOYO_TYPE_ENV_ACL
) {
1539 struct tomoyo_env_acl
*ptr
=
1540 container_of(acl
, typeof(*ptr
), head
);
1542 tomoyo_set_group(head
, "misc env ");
1543 tomoyo_set_string(head
, ptr
->env
->name
);
1546 head
->r
.print_cond_part
= true;
1547 head
->r
.cond_step
= 0;
1548 if (!tomoyo_flush(head
))
1551 if (!tomoyo_print_condition(head
, acl
->cond
))
1553 head
->r
.print_cond_part
= false;
1555 tomoyo_set_lf(head
);
1561 * tomoyo_read_domain2 - Read domain policy.
1563 * @head: Pointer to "struct tomoyo_io_buffer".
1564 * @list: Pointer to "struct list_head".
1566 * Caller holds tomoyo_read_lock().
1568 * Returns true on success, false otherwise.
1570 static bool tomoyo_read_domain2(struct tomoyo_io_buffer
*head
,
1571 struct list_head
*list
)
1573 list_for_each_cookie(head
->r
.acl
, list
) {
1574 struct tomoyo_acl_info
*ptr
=
1575 list_entry(head
->r
.acl
, typeof(*ptr
), list
);
1576 if (!tomoyo_print_entry(head
, ptr
))
1584 * tomoyo_read_domain - Read domain policy.
1586 * @head: Pointer to "struct tomoyo_io_buffer".
1588 * Caller holds tomoyo_read_lock().
1590 static void tomoyo_read_domain(struct tomoyo_io_buffer
*head
)
1594 list_for_each_cookie(head
->r
.domain
, &tomoyo_domain_list
) {
1595 struct tomoyo_domain_info
*domain
=
1596 list_entry(head
->r
.domain
, typeof(*domain
), list
);
1597 switch (head
->r
.step
) {
1600 if (domain
->is_deleted
&&
1601 !head
->r
.print_this_domain_only
)
1603 /* Print domainname and flags. */
1604 tomoyo_set_string(head
, domain
->domainname
->name
);
1605 tomoyo_set_lf(head
);
1606 tomoyo_io_printf(head
, "use_profile %u\n",
1608 tomoyo_io_printf(head
, "use_group %u\n",
1610 for (i
= 0; i
< TOMOYO_MAX_DOMAIN_INFO_FLAGS
; i
++)
1611 if (domain
->flags
[i
])
1612 tomoyo_set_string(head
, tomoyo_dif
[i
]);
1614 tomoyo_set_lf(head
);
1617 if (!tomoyo_read_domain2(head
, &domain
->acl_info_list
))
1620 if (!tomoyo_set_lf(head
))
1625 if (head
->r
.print_this_domain_only
)
1634 * tomoyo_write_pid: Specify PID to obtain domainname.
1636 * @head: Pointer to "struct tomoyo_io_buffer".
1640 static int tomoyo_write_pid(struct tomoyo_io_buffer
*head
)
1642 head
->r
.eof
= false;
1647 * tomoyo_read_pid - Get domainname of the specified PID.
1649 * @head: Pointer to "struct tomoyo_io_buffer".
1651 * Returns the domainname which the specified PID is in on success,
1652 * empty string otherwise.
1653 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1654 * using read()/write() interface rather than sysctl() interface.
1656 static void tomoyo_read_pid(struct tomoyo_io_buffer
*head
)
1658 char *buf
= head
->write_buf
;
1659 bool global_pid
= false;
1661 struct task_struct
*p
;
1662 struct tomoyo_domain_info
*domain
= NULL
;
1664 /* Accessing write_buf is safe because head->io_sem is held. */
1667 return; /* Do nothing if open(O_RDONLY). */
1669 if (head
->r
.w_pos
|| head
->r
.eof
)
1672 if (tomoyo_str_starts(&buf
, "global-pid "))
1674 pid
= (unsigned int) simple_strtoul(buf
, NULL
, 10);
1677 p
= find_task_by_pid_ns(pid
, &init_pid_ns
);
1679 p
= find_task_by_vpid(pid
);
1681 domain
= tomoyo_real_domain(p
);
1685 tomoyo_io_printf(head
, "%u %u ", pid
, domain
->profile
);
1686 tomoyo_set_string(head
, domain
->domainname
->name
);
1689 /* String table for domain transition control keywords. */
1690 static const char *tomoyo_transition_type
[TOMOYO_MAX_TRANSITION_TYPE
] = {
1691 [TOMOYO_TRANSITION_CONTROL_NO_RESET
] = "no_reset_domain ",
1692 [TOMOYO_TRANSITION_CONTROL_RESET
] = "reset_domain ",
1693 [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE
] = "no_initialize_domain ",
1694 [TOMOYO_TRANSITION_CONTROL_INITIALIZE
] = "initialize_domain ",
1695 [TOMOYO_TRANSITION_CONTROL_NO_KEEP
] = "no_keep_domain ",
1696 [TOMOYO_TRANSITION_CONTROL_KEEP
] = "keep_domain ",
1699 /* String table for grouping keywords. */
1700 static const char *tomoyo_group_name
[TOMOYO_MAX_GROUP
] = {
1701 [TOMOYO_PATH_GROUP
] = "path_group ",
1702 [TOMOYO_NUMBER_GROUP
] = "number_group ",
1703 [TOMOYO_ADDRESS_GROUP
] = "address_group ",
1707 * tomoyo_write_exception - Write exception policy.
1709 * @head: Pointer to "struct tomoyo_io_buffer".
1711 * Returns 0 on success, negative value otherwise.
1713 * Caller holds tomoyo_read_lock().
1715 static int tomoyo_write_exception(struct tomoyo_io_buffer
*head
)
1717 const bool is_delete
= head
->w
.is_delete
;
1718 struct tomoyo_acl_param param
= {
1720 .is_delete
= is_delete
,
1721 .data
= head
->write_buf
,
1724 if (tomoyo_str_starts(¶m
.data
, "aggregator "))
1725 return tomoyo_write_aggregator(¶m
);
1726 for (i
= 0; i
< TOMOYO_MAX_TRANSITION_TYPE
; i
++)
1727 if (tomoyo_str_starts(¶m
.data
, tomoyo_transition_type
[i
]))
1728 return tomoyo_write_transition_control(¶m
, i
);
1729 for (i
= 0; i
< TOMOYO_MAX_GROUP
; i
++)
1730 if (tomoyo_str_starts(¶m
.data
, tomoyo_group_name
[i
]))
1731 return tomoyo_write_group(¶m
, i
);
1732 if (tomoyo_str_starts(¶m
.data
, "acl_group ")) {
1735 group
= simple_strtoul(param
.data
, &data
, 10);
1736 if (group
< TOMOYO_MAX_ACL_GROUPS
&& *data
++ == ' ')
1737 return tomoyo_write_domain2
1738 (head
->w
.ns
, &head
->w
.ns
->acl_group
[group
],
1745 * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
1747 * @head: Pointer to "struct tomoyo_io_buffer".
1748 * @idx: Index number.
1750 * Returns true on success, false otherwise.
1752 * Caller holds tomoyo_read_lock().
1754 static bool tomoyo_read_group(struct tomoyo_io_buffer
*head
, const int idx
)
1756 struct tomoyo_policy_namespace
*ns
=
1757 container_of(head
->r
.ns
, typeof(*ns
), namespace_list
);
1758 struct list_head
*list
= &ns
->group_list
[idx
];
1759 list_for_each_cookie(head
->r
.group
, list
) {
1760 struct tomoyo_group
*group
=
1761 list_entry(head
->r
.group
, typeof(*group
), head
.list
);
1762 list_for_each_cookie(head
->r
.acl
, &group
->member_list
) {
1763 struct tomoyo_acl_head
*ptr
=
1764 list_entry(head
->r
.acl
, typeof(*ptr
), list
);
1765 if (ptr
->is_deleted
)
1767 if (!tomoyo_flush(head
))
1769 tomoyo_print_namespace(head
);
1770 tomoyo_set_string(head
, tomoyo_group_name
[idx
]);
1771 tomoyo_set_string(head
, group
->group_name
->name
);
1772 if (idx
== TOMOYO_PATH_GROUP
) {
1773 tomoyo_set_space(head
);
1774 tomoyo_set_string(head
, container_of
1775 (ptr
, struct tomoyo_path_group
,
1776 head
)->member_name
->name
);
1777 } else if (idx
== TOMOYO_NUMBER_GROUP
) {
1778 tomoyo_print_number_union(head
, &container_of
1780 struct tomoyo_number_group
,
1782 } else if (idx
== TOMOYO_ADDRESS_GROUP
) {
1785 struct tomoyo_address_group
*member
=
1786 container_of(ptr
, typeof(*member
),
1788 tomoyo_print_ip(buffer
, sizeof(buffer
),
1790 tomoyo_io_printf(head
, " %s", buffer
);
1792 tomoyo_set_lf(head
);
1796 head
->r
.group
= NULL
;
1801 * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
1803 * @head: Pointer to "struct tomoyo_io_buffer".
1804 * @idx: Index number.
1806 * Returns true on success, false otherwise.
1808 * Caller holds tomoyo_read_lock().
1810 static bool tomoyo_read_policy(struct tomoyo_io_buffer
*head
, const int idx
)
1812 struct tomoyo_policy_namespace
*ns
=
1813 container_of(head
->r
.ns
, typeof(*ns
), namespace_list
);
1814 struct list_head
*list
= &ns
->policy_list
[idx
];
1815 list_for_each_cookie(head
->r
.acl
, list
) {
1816 struct tomoyo_acl_head
*acl
=
1817 container_of(head
->r
.acl
, typeof(*acl
), list
);
1818 if (acl
->is_deleted
)
1820 if (!tomoyo_flush(head
))
1823 case TOMOYO_ID_TRANSITION_CONTROL
:
1825 struct tomoyo_transition_control
*ptr
=
1826 container_of(acl
, typeof(*ptr
), head
);
1827 tomoyo_print_namespace(head
);
1828 tomoyo_set_string(head
, tomoyo_transition_type
1830 tomoyo_set_string(head
, ptr
->program
?
1831 ptr
->program
->name
: "any");
1832 tomoyo_set_string(head
, " from ");
1833 tomoyo_set_string(head
, ptr
->domainname
?
1834 ptr
->domainname
->name
:
1838 case TOMOYO_ID_AGGREGATOR
:
1840 struct tomoyo_aggregator
*ptr
=
1841 container_of(acl
, typeof(*ptr
), head
);
1842 tomoyo_print_namespace(head
);
1843 tomoyo_set_string(head
, "aggregator ");
1844 tomoyo_set_string(head
,
1845 ptr
->original_name
->name
);
1846 tomoyo_set_space(head
);
1847 tomoyo_set_string(head
,
1848 ptr
->aggregated_name
->name
);
1854 tomoyo_set_lf(head
);
1861 * tomoyo_read_exception - Read exception policy.
1863 * @head: Pointer to "struct tomoyo_io_buffer".
1865 * Caller holds tomoyo_read_lock().
1867 static void tomoyo_read_exception(struct tomoyo_io_buffer
*head
)
1869 struct tomoyo_policy_namespace
*ns
=
1870 container_of(head
->r
.ns
, typeof(*ns
), namespace_list
);
1873 while (head
->r
.step
< TOMOYO_MAX_POLICY
&&
1874 tomoyo_read_policy(head
, head
->r
.step
))
1876 if (head
->r
.step
< TOMOYO_MAX_POLICY
)
1878 while (head
->r
.step
< TOMOYO_MAX_POLICY
+ TOMOYO_MAX_GROUP
&&
1879 tomoyo_read_group(head
, head
->r
.step
- TOMOYO_MAX_POLICY
))
1881 if (head
->r
.step
< TOMOYO_MAX_POLICY
+ TOMOYO_MAX_GROUP
)
1883 while (head
->r
.step
< TOMOYO_MAX_POLICY
+ TOMOYO_MAX_GROUP
1884 + TOMOYO_MAX_ACL_GROUPS
) {
1885 head
->r
.acl_group_index
= head
->r
.step
- TOMOYO_MAX_POLICY
1887 if (!tomoyo_read_domain2(head
, &ns
->acl_group
1888 [head
->r
.acl_group_index
]))
1895 /* Wait queue for kernel -> userspace notification. */
1896 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait
);
1897 /* Wait queue for userspace -> kernel notification. */
1898 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait
);
1900 /* Structure for query. */
1901 struct tomoyo_query
{
1902 struct list_head list
;
1903 struct tomoyo_domain_info
*domain
;
1906 unsigned int serial
;
1912 /* The list for "struct tomoyo_query". */
1913 static LIST_HEAD(tomoyo_query_list
);
1915 /* Lock for manipulating tomoyo_query_list. */
1916 static DEFINE_SPINLOCK(tomoyo_query_list_lock
);
1919 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1922 static atomic_t tomoyo_query_observers
= ATOMIC_INIT(0);
1925 * tomoyo_truncate - Truncate a line.
1927 * @str: String to truncate.
1929 * Returns length of truncated @str.
1931 static int tomoyo_truncate(char *str
)
1934 while (*(unsigned char *) str
> (unsigned char) ' ')
1937 return strlen(start
) + 1;
1941 * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
1943 * @domain: Pointer to "struct tomoyo_domain_info".
1944 * @header: Lines containing ACL.
1948 static void tomoyo_add_entry(struct tomoyo_domain_info
*domain
, char *header
)
1951 char *realpath
= NULL
;
1953 char *symlink
= NULL
;
1954 char *cp
= strchr(header
, '\n');
1958 cp
= strchr(cp
+ 1, '\n');
1962 len
= strlen(cp
) + 1;
1963 /* strstr() will return NULL if ordering is wrong. */
1965 argv0
= strstr(header
, " argv[]={ \"");
1968 len
+= tomoyo_truncate(argv0
) + 14;
1970 realpath
= strstr(header
, " exec={ realpath=\"");
1973 len
+= tomoyo_truncate(realpath
) + 6;
1975 symlink
= strstr(header
, " symlink.target=\"");
1977 len
+= tomoyo_truncate(symlink
+ 1) + 1;
1979 buffer
= kmalloc(len
, GFP_NOFS
);
1982 snprintf(buffer
, len
- 1, "%s", cp
);
1984 tomoyo_addprintf(buffer
, len
, " exec.%s", realpath
);
1986 tomoyo_addprintf(buffer
, len
, " exec.argv[0]=%s", argv0
);
1988 tomoyo_addprintf(buffer
, len
, "%s", symlink
);
1989 tomoyo_normalize_line(buffer
);
1990 if (!tomoyo_write_domain2(domain
->ns
, &domain
->acl_info_list
, buffer
,
1992 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES
);
1997 * tomoyo_supervisor - Ask for the supervisor's decision.
1999 * @r: Pointer to "struct tomoyo_request_info".
2000 * @fmt: The printf()'s format string, followed by parameters.
2002 * Returns 0 if the supervisor decided to permit the access request which
2003 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
2004 * supervisor decided to retry the access request which violated the policy in
2005 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
2007 int tomoyo_supervisor(struct tomoyo_request_info
*r
, const char *fmt
, ...)
2012 static unsigned int tomoyo_serial
;
2013 struct tomoyo_query entry
= { };
2014 bool quota_exceeded
= false;
2015 va_start(args
, fmt
);
2016 len
= vsnprintf((char *) &len
, 1, fmt
, args
) + 1;
2018 /* Write /sys/kernel/security/tomoyo/audit. */
2019 va_start(args
, fmt
);
2020 tomoyo_write_log2(r
, len
, fmt
, args
);
2022 /* Nothing more to do if granted. */
2026 tomoyo_update_stat(r
->mode
);
2028 case TOMOYO_CONFIG_ENFORCING
:
2030 if (atomic_read(&tomoyo_query_observers
))
2033 case TOMOYO_CONFIG_LEARNING
:
2035 /* Check max_learning_entry parameter. */
2036 if (tomoyo_domain_quota_is_ok(r
))
2043 va_start(args
, fmt
);
2044 entry
.query
= tomoyo_init_log(r
, len
, fmt
, args
);
2048 entry
.query_len
= strlen(entry
.query
) + 1;
2050 tomoyo_add_entry(r
->domain
, entry
.query
);
2053 len
= tomoyo_round2(entry
.query_len
);
2054 entry
.domain
= r
->domain
;
2055 spin_lock(&tomoyo_query_list_lock
);
2056 if (tomoyo_memory_quota
[TOMOYO_MEMORY_QUERY
] &&
2057 tomoyo_memory_used
[TOMOYO_MEMORY_QUERY
] + len
2058 >= tomoyo_memory_quota
[TOMOYO_MEMORY_QUERY
]) {
2059 quota_exceeded
= true;
2061 entry
.serial
= tomoyo_serial
++;
2062 entry
.retry
= r
->retry
;
2063 tomoyo_memory_used
[TOMOYO_MEMORY_QUERY
] += len
;
2064 list_add_tail(&entry
.list
, &tomoyo_query_list
);
2066 spin_unlock(&tomoyo_query_list_lock
);
2069 /* Give 10 seconds for supervisor's opinion. */
2070 while (entry
.timer
< 10) {
2071 wake_up_all(&tomoyo_query_wait
);
2072 if (wait_event_interruptible_timeout
2073 (tomoyo_answer_wait
, entry
.answer
||
2074 !atomic_read(&tomoyo_query_observers
), HZ
))
2079 spin_lock(&tomoyo_query_list_lock
);
2080 list_del(&entry
.list
);
2081 tomoyo_memory_used
[TOMOYO_MEMORY_QUERY
] -= len
;
2082 spin_unlock(&tomoyo_query_list_lock
);
2083 switch (entry
.answer
) {
2084 case 3: /* Asked to retry by administrator. */
2085 error
= TOMOYO_RETRY_REQUEST
;
2089 /* Granted by administrator. */
2093 /* Timed out or rejected by administrator. */
2102 * tomoyo_find_domain_by_qid - Get domain by query id.
2104 * @serial: Query ID assigned by tomoyo_supervisor().
2106 * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
2108 static struct tomoyo_domain_info
*tomoyo_find_domain_by_qid
2109 (unsigned int serial
)
2111 struct tomoyo_query
*ptr
;
2112 struct tomoyo_domain_info
*domain
= NULL
;
2113 spin_lock(&tomoyo_query_list_lock
);
2114 list_for_each_entry(ptr
, &tomoyo_query_list
, list
) {
2115 if (ptr
->serial
!= serial
)
2117 domain
= ptr
->domain
;
2120 spin_unlock(&tomoyo_query_list_lock
);
2125 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
2127 * @file: Pointer to "struct file".
2128 * @wait: Pointer to "poll_table".
2130 * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise.
2132 * Waits for access requests which violated policy in enforcing mode.
2134 static unsigned int tomoyo_poll_query(struct file
*file
, poll_table
*wait
)
2136 if (!list_empty(&tomoyo_query_list
))
2137 return POLLIN
| POLLRDNORM
;
2138 poll_wait(file
, &tomoyo_query_wait
, wait
);
2139 if (!list_empty(&tomoyo_query_list
))
2140 return POLLIN
| POLLRDNORM
;
2145 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
2147 * @head: Pointer to "struct tomoyo_io_buffer".
2149 static void tomoyo_read_query(struct tomoyo_io_buffer
*head
)
2151 struct list_head
*tmp
;
2152 unsigned int pos
= 0;
2157 if (head
->read_buf
) {
2158 kfree(head
->read_buf
);
2159 head
->read_buf
= NULL
;
2161 spin_lock(&tomoyo_query_list_lock
);
2162 list_for_each(tmp
, &tomoyo_query_list
) {
2163 struct tomoyo_query
*ptr
= list_entry(tmp
, typeof(*ptr
), list
);
2164 if (pos
++ != head
->r
.query_index
)
2166 len
= ptr
->query_len
;
2169 spin_unlock(&tomoyo_query_list_lock
);
2171 head
->r
.query_index
= 0;
2174 buf
= kzalloc(len
+ 32, GFP_NOFS
);
2178 spin_lock(&tomoyo_query_list_lock
);
2179 list_for_each(tmp
, &tomoyo_query_list
) {
2180 struct tomoyo_query
*ptr
= list_entry(tmp
, typeof(*ptr
), list
);
2181 if (pos
++ != head
->r
.query_index
)
2184 * Some query can be skipped because tomoyo_query_list
2185 * can change, but I don't care.
2187 if (len
== ptr
->query_len
)
2188 snprintf(buf
, len
+ 31, "Q%u-%hu\n%s", ptr
->serial
,
2189 ptr
->retry
, ptr
->query
);
2192 spin_unlock(&tomoyo_query_list_lock
);
2194 head
->read_buf
= buf
;
2195 head
->r
.w
[head
->r
.w_pos
++] = buf
;
2196 head
->r
.query_index
++;
2203 * tomoyo_write_answer - Write the supervisor's decision.
2205 * @head: Pointer to "struct tomoyo_io_buffer".
2207 * Returns 0 on success, -EINVAL otherwise.
2209 static int tomoyo_write_answer(struct tomoyo_io_buffer
*head
)
2211 char *data
= head
->write_buf
;
2212 struct list_head
*tmp
;
2213 unsigned int serial
;
2214 unsigned int answer
;
2215 spin_lock(&tomoyo_query_list_lock
);
2216 list_for_each(tmp
, &tomoyo_query_list
) {
2217 struct tomoyo_query
*ptr
= list_entry(tmp
, typeof(*ptr
), list
);
2220 spin_unlock(&tomoyo_query_list_lock
);
2221 if (sscanf(data
, "A%u=%u", &serial
, &answer
) != 2)
2223 spin_lock(&tomoyo_query_list_lock
);
2224 list_for_each(tmp
, &tomoyo_query_list
) {
2225 struct tomoyo_query
*ptr
= list_entry(tmp
, typeof(*ptr
), list
);
2226 if (ptr
->serial
!= serial
)
2228 ptr
->answer
= answer
;
2229 /* Remove from tomoyo_query_list. */
2231 list_del_init(&ptr
->list
);
2234 spin_unlock(&tomoyo_query_list_lock
);
2239 * tomoyo_read_version: Get version.
2241 * @head: Pointer to "struct tomoyo_io_buffer".
2243 * Returns version information.
2245 static void tomoyo_read_version(struct tomoyo_io_buffer
*head
)
2248 tomoyo_io_printf(head
, "2.5.0");
2253 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2254 static const char * const tomoyo_policy_headers
[TOMOYO_MAX_POLICY_STAT
] = {
2255 [TOMOYO_STAT_POLICY_UPDATES
] = "update:",
2256 [TOMOYO_STAT_POLICY_LEARNING
] = "violation in learning mode:",
2257 [TOMOYO_STAT_POLICY_PERMISSIVE
] = "violation in permissive mode:",
2258 [TOMOYO_STAT_POLICY_ENFORCING
] = "violation in enforcing mode:",
2261 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2262 static const char * const tomoyo_memory_headers
[TOMOYO_MAX_MEMORY_STAT
] = {
2263 [TOMOYO_MEMORY_POLICY
] = "policy:",
2264 [TOMOYO_MEMORY_AUDIT
] = "audit log:",
2265 [TOMOYO_MEMORY_QUERY
] = "query message:",
2268 /* Timestamp counter for last updated. */
2269 static unsigned int tomoyo_stat_updated
[TOMOYO_MAX_POLICY_STAT
];
2270 /* Counter for number of updates. */
2271 static unsigned int tomoyo_stat_modified
[TOMOYO_MAX_POLICY_STAT
];
2274 * tomoyo_update_stat - Update statistic counters.
2276 * @index: Index for policy type.
2280 void tomoyo_update_stat(const u8 index
)
2283 do_gettimeofday(&tv
);
2285 * I don't use atomic operations because race condition is not fatal.
2287 tomoyo_stat_updated
[index
]++;
2288 tomoyo_stat_modified
[index
] = tv
.tv_sec
;
2292 * tomoyo_read_stat - Read statistic data.
2294 * @head: Pointer to "struct tomoyo_io_buffer".
2298 static void tomoyo_read_stat(struct tomoyo_io_buffer
*head
)
2301 unsigned int total
= 0;
2304 for (i
= 0; i
< TOMOYO_MAX_POLICY_STAT
; i
++) {
2305 tomoyo_io_printf(head
, "Policy %-30s %10u",
2306 tomoyo_policy_headers
[i
],
2307 tomoyo_stat_updated
[i
]);
2308 if (tomoyo_stat_modified
[i
]) {
2309 struct tomoyo_time stamp
;
2310 tomoyo_convert_time(tomoyo_stat_modified
[i
], &stamp
);
2311 tomoyo_io_printf(head
, " (Last: %04u/%02u/%02u "
2313 stamp
.year
, stamp
.month
, stamp
.day
,
2314 stamp
.hour
, stamp
.min
, stamp
.sec
);
2316 tomoyo_set_lf(head
);
2318 for (i
= 0; i
< TOMOYO_MAX_MEMORY_STAT
; i
++) {
2319 unsigned int used
= tomoyo_memory_used
[i
];
2321 tomoyo_io_printf(head
, "Memory used by %-22s %10u",
2322 tomoyo_memory_headers
[i
], used
);
2323 used
= tomoyo_memory_quota
[i
];
2325 tomoyo_io_printf(head
, " (Quota: %10u)", used
);
2326 tomoyo_set_lf(head
);
2328 tomoyo_io_printf(head
, "Total memory used: %10u\n",
2334 * tomoyo_write_stat - Set memory quota.
2336 * @head: Pointer to "struct tomoyo_io_buffer".
2340 static int tomoyo_write_stat(struct tomoyo_io_buffer
*head
)
2342 char *data
= head
->write_buf
;
2344 if (tomoyo_str_starts(&data
, "Memory used by "))
2345 for (i
= 0; i
< TOMOYO_MAX_MEMORY_STAT
; i
++)
2346 if (tomoyo_str_starts(&data
, tomoyo_memory_headers
[i
]))
2347 sscanf(data
, "%u", &tomoyo_memory_quota
[i
]);
2352 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
2354 * @type: Type of interface.
2355 * @file: Pointer to "struct file".
2357 * Returns 0 on success, negative value otherwise.
2359 int tomoyo_open_control(const u8 type
, struct file
*file
)
2361 struct tomoyo_io_buffer
*head
= kzalloc(sizeof(*head
), GFP_NOFS
);
2365 mutex_init(&head
->io_sem
);
2368 case TOMOYO_DOMAINPOLICY
:
2369 /* /sys/kernel/security/tomoyo/domain_policy */
2370 head
->write
= tomoyo_write_domain
;
2371 head
->read
= tomoyo_read_domain
;
2373 case TOMOYO_EXCEPTIONPOLICY
:
2374 /* /sys/kernel/security/tomoyo/exception_policy */
2375 head
->write
= tomoyo_write_exception
;
2376 head
->read
= tomoyo_read_exception
;
2379 /* /sys/kernel/security/tomoyo/audit */
2380 head
->poll
= tomoyo_poll_log
;
2381 head
->read
= tomoyo_read_log
;
2383 case TOMOYO_PROCESS_STATUS
:
2384 /* /sys/kernel/security/tomoyo/.process_status */
2385 head
->write
= tomoyo_write_pid
;
2386 head
->read
= tomoyo_read_pid
;
2388 case TOMOYO_VERSION
:
2389 /* /sys/kernel/security/tomoyo/version */
2390 head
->read
= tomoyo_read_version
;
2391 head
->readbuf_size
= 128;
2394 /* /sys/kernel/security/tomoyo/stat */
2395 head
->write
= tomoyo_write_stat
;
2396 head
->read
= tomoyo_read_stat
;
2397 head
->readbuf_size
= 1024;
2399 case TOMOYO_PROFILE
:
2400 /* /sys/kernel/security/tomoyo/profile */
2401 head
->write
= tomoyo_write_profile
;
2402 head
->read
= tomoyo_read_profile
;
2404 case TOMOYO_QUERY
: /* /sys/kernel/security/tomoyo/query */
2405 head
->poll
= tomoyo_poll_query
;
2406 head
->write
= tomoyo_write_answer
;
2407 head
->read
= tomoyo_read_query
;
2409 case TOMOYO_MANAGER
:
2410 /* /sys/kernel/security/tomoyo/manager */
2411 head
->write
= tomoyo_write_manager
;
2412 head
->read
= tomoyo_read_manager
;
2415 if (!(file
->f_mode
& FMODE_READ
)) {
2417 * No need to allocate read_buf since it is not opened
2422 } else if (!head
->poll
) {
2423 /* Don't allocate read_buf for poll() access. */
2424 if (!head
->readbuf_size
)
2425 head
->readbuf_size
= 4096 * 2;
2426 head
->read_buf
= kzalloc(head
->readbuf_size
, GFP_NOFS
);
2427 if (!head
->read_buf
) {
2432 if (!(file
->f_mode
& FMODE_WRITE
)) {
2434 * No need to allocate write_buf since it is not opened
2438 } else if (head
->write
) {
2439 head
->writebuf_size
= 4096 * 2;
2440 head
->write_buf
= kzalloc(head
->writebuf_size
, GFP_NOFS
);
2441 if (!head
->write_buf
) {
2442 kfree(head
->read_buf
);
2448 * If the file is /sys/kernel/security/tomoyo/query , increment the
2450 * The obserber counter is used by tomoyo_supervisor() to see if
2451 * there is some process monitoring /sys/kernel/security/tomoyo/query.
2453 if (type
== TOMOYO_QUERY
)
2454 atomic_inc(&tomoyo_query_observers
);
2455 file
->private_data
= head
;
2456 tomoyo_notify_gc(head
, true);
2461 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
2463 * @file: Pointer to "struct file".
2464 * @wait: Pointer to "poll_table". Maybe NULL.
2466 * Returns POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM if ready to read/write,
2467 * POLLOUT | POLLWRNORM otherwise.
2469 unsigned int tomoyo_poll_control(struct file
*file
, poll_table
*wait
)
2471 struct tomoyo_io_buffer
*head
= file
->private_data
;
2473 return head
->poll(file
, wait
) | POLLOUT
| POLLWRNORM
;
2474 return POLLIN
| POLLRDNORM
| POLLOUT
| POLLWRNORM
;
2478 * tomoyo_set_namespace_cursor - Set namespace to read.
2480 * @head: Pointer to "struct tomoyo_io_buffer".
2484 static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer
*head
)
2486 struct list_head
*ns
;
2487 if (head
->type
!= TOMOYO_EXCEPTIONPOLICY
&&
2488 head
->type
!= TOMOYO_PROFILE
)
2491 * If this is the first read, or reading previous namespace finished
2492 * and has more namespaces to read, update the namespace cursor.
2495 if (!ns
|| (head
->r
.eof
&& ns
->next
!= &tomoyo_namespace_list
)) {
2496 /* Clearing is OK because tomoyo_flush() returned true. */
2497 memset(&head
->r
, 0, sizeof(head
->r
));
2498 head
->r
.ns
= ns
? ns
->next
: tomoyo_namespace_list
.next
;
2503 * tomoyo_has_more_namespace - Check for unread namespaces.
2505 * @head: Pointer to "struct tomoyo_io_buffer".
2507 * Returns true if we have more entries to print, false otherwise.
2509 static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer
*head
)
2511 return (head
->type
== TOMOYO_EXCEPTIONPOLICY
||
2512 head
->type
== TOMOYO_PROFILE
) && head
->r
.eof
&&
2513 head
->r
.ns
->next
!= &tomoyo_namespace_list
;
2517 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
2519 * @head: Pointer to "struct tomoyo_io_buffer".
2520 * @buffer: Poiner to buffer to write to.
2521 * @buffer_len: Size of @buffer.
2523 * Returns bytes read on success, negative value otherwise.
2525 ssize_t
tomoyo_read_control(struct tomoyo_io_buffer
*head
, char __user
*buffer
,
2526 const int buffer_len
)
2533 if (mutex_lock_interruptible(&head
->io_sem
))
2535 head
->read_user_buf
= buffer
;
2536 head
->read_user_buf_avail
= buffer_len
;
2537 idx
= tomoyo_read_lock();
2538 if (tomoyo_flush(head
))
2539 /* Call the policy handler. */
2541 tomoyo_set_namespace_cursor(head
);
2543 } while (tomoyo_flush(head
) &&
2544 tomoyo_has_more_namespace(head
));
2545 tomoyo_read_unlock(idx
);
2546 len
= head
->read_user_buf
- buffer
;
2547 mutex_unlock(&head
->io_sem
);
2552 * tomoyo_parse_policy - Parse a policy line.
2554 * @head: Poiter to "struct tomoyo_io_buffer".
2555 * @line: Line to parse.
2557 * Returns 0 on success, negative value otherwise.
2559 * Caller holds tomoyo_read_lock().
2561 static int tomoyo_parse_policy(struct tomoyo_io_buffer
*head
, char *line
)
2563 /* Delete request? */
2564 head
->w
.is_delete
= !strncmp(line
, "delete ", 7);
2565 if (head
->w
.is_delete
)
2566 memmove(line
, line
+ 7, strlen(line
+ 7) + 1);
2567 /* Selecting namespace to update. */
2568 if (head
->type
== TOMOYO_EXCEPTIONPOLICY
||
2569 head
->type
== TOMOYO_PROFILE
) {
2571 char *cp
= strchr(line
, ' ');
2574 head
->w
.ns
= tomoyo_assign_namespace(line
);
2575 memmove(line
, cp
, strlen(cp
) + 1);
2579 head
->w
.ns
= &tomoyo_kernel_namespace
;
2580 /* Don't allow updating if namespace is invalid. */
2584 /* Do the update. */
2585 return head
->write(head
);
2589 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
2591 * @head: Pointer to "struct tomoyo_io_buffer".
2592 * @buffer: Pointer to buffer to read from.
2593 * @buffer_len: Size of @buffer.
2595 * Returns @buffer_len on success, negative value otherwise.
2597 ssize_t
tomoyo_write_control(struct tomoyo_io_buffer
*head
,
2598 const char __user
*buffer
, const int buffer_len
)
2600 int error
= buffer_len
;
2601 size_t avail_len
= buffer_len
;
2602 char *cp0
= head
->write_buf
;
2606 if (!access_ok(VERIFY_READ
, buffer
, buffer_len
))
2608 if (mutex_lock_interruptible(&head
->io_sem
))
2610 head
->read_user_buf_avail
= 0;
2611 idx
= tomoyo_read_lock();
2612 /* Read a line and dispatch it to the policy handler. */
2613 while (avail_len
> 0) {
2615 if (head
->w
.avail
>= head
->writebuf_size
- 1) {
2616 const int len
= head
->writebuf_size
* 2;
2617 char *cp
= kzalloc(len
, GFP_NOFS
);
2622 memmove(cp
, cp0
, head
->w
.avail
);
2624 head
->write_buf
= cp
;
2626 head
->writebuf_size
= len
;
2628 if (get_user(c
, buffer
)) {
2634 cp0
[head
->w
.avail
++] = c
;
2637 cp0
[head
->w
.avail
- 1] = '\0';
2639 tomoyo_normalize_line(cp0
);
2640 if (!strcmp(cp0
, "reset")) {
2641 head
->w
.ns
= &tomoyo_kernel_namespace
;
2642 head
->w
.domain
= NULL
;
2643 memset(&head
->r
, 0, sizeof(head
->r
));
2646 /* Don't allow updating policies by non manager programs. */
2647 switch (head
->type
) {
2648 case TOMOYO_PROCESS_STATUS
:
2649 /* This does not write anything. */
2651 case TOMOYO_DOMAINPOLICY
:
2652 if (tomoyo_select_domain(head
, cp0
))
2655 case TOMOYO_EXCEPTIONPOLICY
:
2656 if (!strcmp(cp0
, "select transition_only")) {
2657 head
->r
.print_transition_related_only
= true;
2662 if (!tomoyo_manager()) {
2667 switch (tomoyo_parse_policy(head
, cp0
)) {
2672 switch (head
->type
) {
2673 case TOMOYO_DOMAINPOLICY
:
2674 case TOMOYO_EXCEPTIONPOLICY
:
2676 case TOMOYO_PROFILE
:
2677 case TOMOYO_MANAGER
:
2678 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES
);
2687 tomoyo_read_unlock(idx
);
2688 mutex_unlock(&head
->io_sem
);
2693 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
2695 * @head: Pointer to "struct tomoyo_io_buffer".
2699 int tomoyo_close_control(struct tomoyo_io_buffer
*head
)
2702 * If the file is /sys/kernel/security/tomoyo/query , decrement the
2705 if (head
->type
== TOMOYO_QUERY
&&
2706 atomic_dec_and_test(&tomoyo_query_observers
))
2707 wake_up_all(&tomoyo_answer_wait
);
2708 tomoyo_notify_gc(head
, false);
2713 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
2715 void tomoyo_check_profile(void)
2717 struct tomoyo_domain_info
*domain
;
2718 const int idx
= tomoyo_read_lock();
2719 tomoyo_policy_loaded
= true;
2720 printk(KERN_INFO
"TOMOYO: 2.5.0\n");
2721 list_for_each_entry_rcu(domain
, &tomoyo_domain_list
, list
) {
2722 const u8 profile
= domain
->profile
;
2723 const struct tomoyo_policy_namespace
*ns
= domain
->ns
;
2724 if (ns
->profile_version
!= 20110903)
2726 "Profile version %u is not supported.\n",
2727 ns
->profile_version
);
2728 else if (!ns
->profile_ptr
[profile
])
2730 "Profile %u (used by '%s') is not defined.\n",
2731 profile
, domain
->domainname
->name
);
2735 "Userland tools for TOMOYO 2.5 must be installed and "
2736 "policy must be initialized.\n");
2737 printk(KERN_ERR
"Please see http://tomoyo.sourceforge.jp/2.5/ "
2738 "for more information.\n");
2741 tomoyo_read_unlock(idx
);
2742 printk(KERN_INFO
"Mandatory Access Control activated.\n");
2746 * tomoyo_load_builtin_policy - Load built-in policy.
2750 void __init
tomoyo_load_builtin_policy(void)
2753 * This include file is manually created and contains built-in policy
2754 * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy",
2755 * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager",
2756 * "tomoyo_builtin_stat" in the form of "static char [] __initdata".
2758 #include "builtin-policy.h"
2760 const int idx
= tomoyo_read_lock();
2761 for (i
= 0; i
< 5; i
++) {
2762 struct tomoyo_io_buffer head
= { };
2766 start
= tomoyo_builtin_profile
;
2767 head
.type
= TOMOYO_PROFILE
;
2768 head
.write
= tomoyo_write_profile
;
2771 start
= tomoyo_builtin_exception_policy
;
2772 head
.type
= TOMOYO_EXCEPTIONPOLICY
;
2773 head
.write
= tomoyo_write_exception
;
2776 start
= tomoyo_builtin_domain_policy
;
2777 head
.type
= TOMOYO_DOMAINPOLICY
;
2778 head
.write
= tomoyo_write_domain
;
2781 start
= tomoyo_builtin_manager
;
2782 head
.type
= TOMOYO_MANAGER
;
2783 head
.write
= tomoyo_write_manager
;
2786 start
= tomoyo_builtin_stat
;
2787 head
.type
= TOMOYO_STAT
;
2788 head
.write
= tomoyo_write_stat
;
2792 char *end
= strchr(start
, '\n');
2796 tomoyo_normalize_line(start
);
2797 head
.write_buf
= start
;
2798 tomoyo_parse_policy(&head
, start
);
2802 tomoyo_read_unlock(idx
);
2803 #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
2804 tomoyo_check_profile();