1 // SPDX-License-Identifier: GPL-2.0
3 * security/tomoyo/common.c
5 * Copyright (C) 2005-2011 NTT DATA CORPORATION
8 #include <linux/uaccess.h>
9 #include <linux/slab.h>
10 #include <linux/security.h>
13 /* String table for operation mode. */
14 const char * const tomoyo_mode
[TOMOYO_CONFIG_MAX_MODE
] = {
15 [TOMOYO_CONFIG_DISABLED
] = "disabled",
16 [TOMOYO_CONFIG_LEARNING
] = "learning",
17 [TOMOYO_CONFIG_PERMISSIVE
] = "permissive",
18 [TOMOYO_CONFIG_ENFORCING
] = "enforcing"
21 /* String table for /sys/kernel/security/tomoyo/profile */
22 const char * const tomoyo_mac_keywords
[TOMOYO_MAX_MAC_INDEX
23 + TOMOYO_MAX_MAC_CATEGORY_INDEX
] = {
24 /* CONFIG::file group */
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 /* CONFIG::network group */
49 [TOMOYO_MAC_NETWORK_INET_STREAM_BIND
] = "inet_stream_bind",
50 [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN
] = "inet_stream_listen",
51 [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT
] = "inet_stream_connect",
52 [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND
] = "inet_dgram_bind",
53 [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND
] = "inet_dgram_send",
54 [TOMOYO_MAC_NETWORK_INET_RAW_BIND
] = "inet_raw_bind",
55 [TOMOYO_MAC_NETWORK_INET_RAW_SEND
] = "inet_raw_send",
56 [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND
] = "unix_stream_bind",
57 [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN
] = "unix_stream_listen",
58 [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT
] = "unix_stream_connect",
59 [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND
] = "unix_dgram_bind",
60 [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND
] = "unix_dgram_send",
61 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND
] = "unix_seqpacket_bind",
62 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN
] = "unix_seqpacket_listen",
63 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT
] = "unix_seqpacket_connect",
64 /* CONFIG::misc group */
65 [TOMOYO_MAC_ENVIRON
] = "env",
67 [TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAC_CATEGORY_FILE
] = "file",
68 [TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAC_CATEGORY_NETWORK
] = "network",
69 [TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAC_CATEGORY_MISC
] = "misc",
72 /* String table for conditions. */
73 const char * const tomoyo_condition_keyword
[TOMOYO_MAX_CONDITION_KEYWORD
] = {
74 [TOMOYO_TASK_UID
] = "task.uid",
75 [TOMOYO_TASK_EUID
] = "task.euid",
76 [TOMOYO_TASK_SUID
] = "task.suid",
77 [TOMOYO_TASK_FSUID
] = "task.fsuid",
78 [TOMOYO_TASK_GID
] = "task.gid",
79 [TOMOYO_TASK_EGID
] = "task.egid",
80 [TOMOYO_TASK_SGID
] = "task.sgid",
81 [TOMOYO_TASK_FSGID
] = "task.fsgid",
82 [TOMOYO_TASK_PID
] = "task.pid",
83 [TOMOYO_TASK_PPID
] = "task.ppid",
84 [TOMOYO_EXEC_ARGC
] = "exec.argc",
85 [TOMOYO_EXEC_ENVC
] = "exec.envc",
86 [TOMOYO_TYPE_IS_SOCKET
] = "socket",
87 [TOMOYO_TYPE_IS_SYMLINK
] = "symlink",
88 [TOMOYO_TYPE_IS_FILE
] = "file",
89 [TOMOYO_TYPE_IS_BLOCK_DEV
] = "block",
90 [TOMOYO_TYPE_IS_DIRECTORY
] = "directory",
91 [TOMOYO_TYPE_IS_CHAR_DEV
] = "char",
92 [TOMOYO_TYPE_IS_FIFO
] = "fifo",
93 [TOMOYO_MODE_SETUID
] = "setuid",
94 [TOMOYO_MODE_SETGID
] = "setgid",
95 [TOMOYO_MODE_STICKY
] = "sticky",
96 [TOMOYO_MODE_OWNER_READ
] = "owner_read",
97 [TOMOYO_MODE_OWNER_WRITE
] = "owner_write",
98 [TOMOYO_MODE_OWNER_EXECUTE
] = "owner_execute",
99 [TOMOYO_MODE_GROUP_READ
] = "group_read",
100 [TOMOYO_MODE_GROUP_WRITE
] = "group_write",
101 [TOMOYO_MODE_GROUP_EXECUTE
] = "group_execute",
102 [TOMOYO_MODE_OTHERS_READ
] = "others_read",
103 [TOMOYO_MODE_OTHERS_WRITE
] = "others_write",
104 [TOMOYO_MODE_OTHERS_EXECUTE
] = "others_execute",
105 [TOMOYO_EXEC_REALPATH
] = "exec.realpath",
106 [TOMOYO_SYMLINK_TARGET
] = "symlink.target",
107 [TOMOYO_PATH1_UID
] = "path1.uid",
108 [TOMOYO_PATH1_GID
] = "path1.gid",
109 [TOMOYO_PATH1_INO
] = "path1.ino",
110 [TOMOYO_PATH1_MAJOR
] = "path1.major",
111 [TOMOYO_PATH1_MINOR
] = "path1.minor",
112 [TOMOYO_PATH1_PERM
] = "path1.perm",
113 [TOMOYO_PATH1_TYPE
] = "path1.type",
114 [TOMOYO_PATH1_DEV_MAJOR
] = "path1.dev_major",
115 [TOMOYO_PATH1_DEV_MINOR
] = "path1.dev_minor",
116 [TOMOYO_PATH2_UID
] = "path2.uid",
117 [TOMOYO_PATH2_GID
] = "path2.gid",
118 [TOMOYO_PATH2_INO
] = "path2.ino",
119 [TOMOYO_PATH2_MAJOR
] = "path2.major",
120 [TOMOYO_PATH2_MINOR
] = "path2.minor",
121 [TOMOYO_PATH2_PERM
] = "path2.perm",
122 [TOMOYO_PATH2_TYPE
] = "path2.type",
123 [TOMOYO_PATH2_DEV_MAJOR
] = "path2.dev_major",
124 [TOMOYO_PATH2_DEV_MINOR
] = "path2.dev_minor",
125 [TOMOYO_PATH1_PARENT_UID
] = "path1.parent.uid",
126 [TOMOYO_PATH1_PARENT_GID
] = "path1.parent.gid",
127 [TOMOYO_PATH1_PARENT_INO
] = "path1.parent.ino",
128 [TOMOYO_PATH1_PARENT_PERM
] = "path1.parent.perm",
129 [TOMOYO_PATH2_PARENT_UID
] = "path2.parent.uid",
130 [TOMOYO_PATH2_PARENT_GID
] = "path2.parent.gid",
131 [TOMOYO_PATH2_PARENT_INO
] = "path2.parent.ino",
132 [TOMOYO_PATH2_PARENT_PERM
] = "path2.parent.perm",
135 /* String table for PREFERENCE keyword. */
136 static const char * const tomoyo_pref_keywords
[TOMOYO_MAX_PREF
] = {
137 [TOMOYO_PREF_MAX_AUDIT_LOG
] = "max_audit_log",
138 [TOMOYO_PREF_MAX_LEARNING_ENTRY
] = "max_learning_entry",
141 /* String table for path operation. */
142 const char * const tomoyo_path_keyword
[TOMOYO_MAX_PATH_OPERATION
] = {
143 [TOMOYO_TYPE_EXECUTE
] = "execute",
144 [TOMOYO_TYPE_READ
] = "read",
145 [TOMOYO_TYPE_WRITE
] = "write",
146 [TOMOYO_TYPE_APPEND
] = "append",
147 [TOMOYO_TYPE_UNLINK
] = "unlink",
148 [TOMOYO_TYPE_GETATTR
] = "getattr",
149 [TOMOYO_TYPE_RMDIR
] = "rmdir",
150 [TOMOYO_TYPE_TRUNCATE
] = "truncate",
151 [TOMOYO_TYPE_SYMLINK
] = "symlink",
152 [TOMOYO_TYPE_CHROOT
] = "chroot",
153 [TOMOYO_TYPE_UMOUNT
] = "unmount",
156 /* String table for socket's operation. */
157 const char * const tomoyo_socket_keyword
[TOMOYO_MAX_NETWORK_OPERATION
] = {
158 [TOMOYO_NETWORK_BIND
] = "bind",
159 [TOMOYO_NETWORK_LISTEN
] = "listen",
160 [TOMOYO_NETWORK_CONNECT
] = "connect",
161 [TOMOYO_NETWORK_SEND
] = "send",
164 /* String table for categories. */
165 static const char * const tomoyo_category_keywords
166 [TOMOYO_MAX_MAC_CATEGORY_INDEX
] = {
167 [TOMOYO_MAC_CATEGORY_FILE
] = "file",
168 [TOMOYO_MAC_CATEGORY_NETWORK
] = "network",
169 [TOMOYO_MAC_CATEGORY_MISC
] = "misc",
172 /* Permit policy management by non-root user? */
173 static bool tomoyo_manage_by_non_root
;
175 /* Utility functions. */
178 * tomoyo_yesno - Return "yes" or "no".
180 * @value: Bool value.
182 const char *tomoyo_yesno(const unsigned int value
)
184 return value
? "yes" : "no";
188 * tomoyo_addprintf - strncat()-like-snprintf().
190 * @buffer: Buffer to write to. Must be '\0'-terminated.
191 * @len: Size of @buffer.
192 * @fmt: The printf()'s format string, followed by parameters.
196 static void tomoyo_addprintf(char *buffer
, int len
, const char *fmt
, ...)
199 const int pos
= strlen(buffer
);
201 vsnprintf(buffer
+ pos
, len
- pos
- 1, fmt
, args
);
206 * tomoyo_flush - Flush queued string to userspace's buffer.
208 * @head: Pointer to "struct tomoyo_io_buffer".
210 * Returns true if all data was flushed, false otherwise.
212 static bool tomoyo_flush(struct tomoyo_io_buffer
*head
)
214 while (head
->r
.w_pos
) {
215 const char *w
= head
->r
.w
[0];
216 size_t len
= strlen(w
);
218 if (len
> head
->read_user_buf_avail
)
219 len
= head
->read_user_buf_avail
;
222 if (copy_to_user(head
->read_user_buf
, w
, len
))
224 head
->read_user_buf_avail
-= len
;
225 head
->read_user_buf
+= len
;
231 /* Add '\0' for audit logs and query. */
233 if (!head
->read_user_buf_avail
||
234 copy_to_user(head
->read_user_buf
, "", 1))
236 head
->read_user_buf_avail
--;
237 head
->read_user_buf
++;
240 for (len
= 0; len
< head
->r
.w_pos
; len
++)
241 head
->r
.w
[len
] = head
->r
.w
[len
+ 1];
248 * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure.
250 * @head: Pointer to "struct tomoyo_io_buffer".
251 * @string: String to print.
253 * Note that @string has to be kept valid until @head is kfree()d.
254 * This means that char[] allocated on stack memory cannot be passed to
255 * this function. Use tomoyo_io_printf() for char[] allocated on stack memory.
257 static void tomoyo_set_string(struct tomoyo_io_buffer
*head
, const char *string
)
259 if (head
->r
.w_pos
< TOMOYO_MAX_IO_READ_QUEUE
) {
260 head
->r
.w
[head
->r
.w_pos
++] = string
;
266 static void tomoyo_io_printf(struct tomoyo_io_buffer
*head
, const char *fmt
,
270 * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure.
272 * @head: Pointer to "struct tomoyo_io_buffer".
273 * @fmt: The printf()'s format string, followed by parameters.
275 static void tomoyo_io_printf(struct tomoyo_io_buffer
*head
, const char *fmt
,
280 size_t pos
= head
->r
.avail
;
281 int size
= head
->readbuf_size
- pos
;
285 len
= vsnprintf(head
->read_buf
+ pos
, size
, fmt
, args
) + 1;
287 if (pos
+ len
>= head
->readbuf_size
) {
291 head
->r
.avail
+= len
;
292 tomoyo_set_string(head
, head
->read_buf
+ pos
);
296 * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure.
298 * @head: Pointer to "struct tomoyo_io_buffer".
302 static void tomoyo_set_space(struct tomoyo_io_buffer
*head
)
304 tomoyo_set_string(head
, " ");
308 * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure.
310 * @head: Pointer to "struct tomoyo_io_buffer".
314 static bool tomoyo_set_lf(struct tomoyo_io_buffer
*head
)
316 tomoyo_set_string(head
, "\n");
317 return !head
->r
.w_pos
;
321 * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure.
323 * @head: Pointer to "struct tomoyo_io_buffer".
327 static void tomoyo_set_slash(struct tomoyo_io_buffer
*head
)
329 tomoyo_set_string(head
, "/");
332 /* List of namespaces. */
333 LIST_HEAD(tomoyo_namespace_list
);
334 /* True if namespace other than tomoyo_kernel_namespace is defined. */
335 static bool tomoyo_namespace_enabled
;
338 * tomoyo_init_policy_namespace - Initialize namespace.
340 * @ns: Pointer to "struct tomoyo_policy_namespace".
344 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace
*ns
)
347 for (idx
= 0; idx
< TOMOYO_MAX_ACL_GROUPS
; idx
++)
348 INIT_LIST_HEAD(&ns
->acl_group
[idx
]);
349 for (idx
= 0; idx
< TOMOYO_MAX_GROUP
; idx
++)
350 INIT_LIST_HEAD(&ns
->group_list
[idx
]);
351 for (idx
= 0; idx
< TOMOYO_MAX_POLICY
; idx
++)
352 INIT_LIST_HEAD(&ns
->policy_list
[idx
]);
353 ns
->profile_version
= 20110903;
354 tomoyo_namespace_enabled
= !list_empty(&tomoyo_namespace_list
);
355 list_add_tail_rcu(&ns
->namespace_list
, &tomoyo_namespace_list
);
359 * tomoyo_print_namespace - Print namespace header.
361 * @head: Pointer to "struct tomoyo_io_buffer".
365 static void tomoyo_print_namespace(struct tomoyo_io_buffer
*head
)
367 if (!tomoyo_namespace_enabled
)
369 tomoyo_set_string(head
,
370 container_of(head
->r
.ns
,
371 struct tomoyo_policy_namespace
,
372 namespace_list
)->name
);
373 tomoyo_set_space(head
);
377 * tomoyo_print_name_union - Print a tomoyo_name_union.
379 * @head: Pointer to "struct tomoyo_io_buffer".
380 * @ptr: Pointer to "struct tomoyo_name_union".
382 static void tomoyo_print_name_union(struct tomoyo_io_buffer
*head
,
383 const struct tomoyo_name_union
*ptr
)
385 tomoyo_set_space(head
);
387 tomoyo_set_string(head
, "@");
388 tomoyo_set_string(head
, ptr
->group
->group_name
->name
);
390 tomoyo_set_string(head
, ptr
->filename
->name
);
395 * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote.
397 * @head: Pointer to "struct tomoyo_io_buffer".
398 * @ptr: Pointer to "struct tomoyo_name_union".
402 static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer
*head
,
403 const struct tomoyo_name_union
*ptr
)
406 tomoyo_set_string(head
, "@");
407 tomoyo_set_string(head
, ptr
->group
->group_name
->name
);
409 tomoyo_set_string(head
, "\"");
410 tomoyo_set_string(head
, ptr
->filename
->name
);
411 tomoyo_set_string(head
, "\"");
416 * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space.
418 * @head: Pointer to "struct tomoyo_io_buffer".
419 * @ptr: Pointer to "struct tomoyo_number_union".
423 static void tomoyo_print_number_union_nospace
424 (struct tomoyo_io_buffer
*head
, const struct tomoyo_number_union
*ptr
)
427 tomoyo_set_string(head
, "@");
428 tomoyo_set_string(head
, ptr
->group
->group_name
->name
);
431 unsigned long min
= ptr
->values
[0];
432 const unsigned long max
= ptr
->values
[1];
433 u8 min_type
= ptr
->value_type
[0];
434 const u8 max_type
= ptr
->value_type
[1];
437 for (i
= 0; i
< 2; i
++) {
439 case TOMOYO_VALUE_TYPE_HEXADECIMAL
:
440 tomoyo_addprintf(buffer
, sizeof(buffer
),
443 case TOMOYO_VALUE_TYPE_OCTAL
:
444 tomoyo_addprintf(buffer
, sizeof(buffer
),
448 tomoyo_addprintf(buffer
, sizeof(buffer
), "%lu",
452 if (min
== max
&& min_type
== max_type
)
454 tomoyo_addprintf(buffer
, sizeof(buffer
), "-");
458 tomoyo_io_printf(head
, "%s", buffer
);
463 * tomoyo_print_number_union - Print a tomoyo_number_union.
465 * @head: Pointer to "struct tomoyo_io_buffer".
466 * @ptr: Pointer to "struct tomoyo_number_union".
470 static void tomoyo_print_number_union(struct tomoyo_io_buffer
*head
,
471 const struct tomoyo_number_union
*ptr
)
473 tomoyo_set_space(head
);
474 tomoyo_print_number_union_nospace(head
, ptr
);
478 * tomoyo_assign_profile - Create a new profile.
480 * @ns: Pointer to "struct tomoyo_policy_namespace".
481 * @profile: Profile number to create.
483 * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
485 static struct tomoyo_profile
*tomoyo_assign_profile
486 (struct tomoyo_policy_namespace
*ns
, const unsigned int profile
)
488 struct tomoyo_profile
*ptr
;
489 struct tomoyo_profile
*entry
;
490 if (profile
>= TOMOYO_MAX_PROFILES
)
492 ptr
= ns
->profile_ptr
[profile
];
495 entry
= kzalloc(sizeof(*entry
), GFP_NOFS
);
496 if (mutex_lock_interruptible(&tomoyo_policy_lock
))
498 ptr
= ns
->profile_ptr
[profile
];
499 if (!ptr
&& tomoyo_memory_ok(entry
)) {
501 ptr
->default_config
= TOMOYO_CONFIG_DISABLED
|
502 TOMOYO_CONFIG_WANT_GRANT_LOG
|
503 TOMOYO_CONFIG_WANT_REJECT_LOG
;
504 memset(ptr
->config
, TOMOYO_CONFIG_USE_DEFAULT
,
505 sizeof(ptr
->config
));
506 ptr
->pref
[TOMOYO_PREF_MAX_AUDIT_LOG
] =
507 CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG
;
508 ptr
->pref
[TOMOYO_PREF_MAX_LEARNING_ENTRY
] =
509 CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY
;
510 mb(); /* Avoid out-of-order execution. */
511 ns
->profile_ptr
[profile
] = ptr
;
514 mutex_unlock(&tomoyo_policy_lock
);
521 * tomoyo_profile - Find a profile.
523 * @ns: Pointer to "struct tomoyo_policy_namespace".
524 * @profile: Profile number to find.
526 * Returns pointer to "struct tomoyo_profile".
528 struct tomoyo_profile
*tomoyo_profile(const struct tomoyo_policy_namespace
*ns
,
531 static struct tomoyo_profile tomoyo_null_profile
;
532 struct tomoyo_profile
*ptr
= ns
->profile_ptr
[profile
];
534 ptr
= &tomoyo_null_profile
;
539 * tomoyo_find_yesno - Find values for specified keyword.
541 * @string: String to check.
542 * @find: Name of keyword.
544 * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
546 static s8
tomoyo_find_yesno(const char *string
, const char *find
)
548 const char *cp
= strstr(string
, find
);
551 if (!strncmp(cp
, "=yes", 4))
553 else if (!strncmp(cp
, "=no", 3))
560 * tomoyo_set_uint - Set value for specified preference.
562 * @i: Pointer to "unsigned int".
563 * @string: String to check.
564 * @find: Name of keyword.
568 static void tomoyo_set_uint(unsigned int *i
, const char *string
,
571 const char *cp
= strstr(string
, find
);
573 sscanf(cp
+ strlen(find
), "=%u", i
);
577 * tomoyo_set_mode - Set mode for specified profile.
579 * @name: Name of functionality.
580 * @value: Mode for @name.
581 * @profile: Pointer to "struct tomoyo_profile".
583 * Returns 0 on success, negative value otherwise.
585 static int tomoyo_set_mode(char *name
, const char *value
,
586 struct tomoyo_profile
*profile
)
590 if (!strcmp(name
, "CONFIG")) {
591 i
= TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
;
592 config
= profile
->default_config
;
593 } else if (tomoyo_str_starts(&name
, "CONFIG::")) {
595 for (i
= 0; i
< TOMOYO_MAX_MAC_INDEX
596 + TOMOYO_MAX_MAC_CATEGORY_INDEX
; i
++) {
598 if (i
< TOMOYO_MAX_MAC_INDEX
) {
599 const u8 c
= tomoyo_index2category
[i
];
600 const char *category
=
601 tomoyo_category_keywords
[c
];
602 len
= strlen(category
);
603 if (strncmp(name
, category
, len
) ||
604 name
[len
++] != ':' || name
[len
++] != ':')
607 if (strcmp(name
+ len
, tomoyo_mac_keywords
[i
]))
609 config
= profile
->config
[i
];
612 if (i
== TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
)
617 if (strstr(value
, "use_default")) {
618 config
= TOMOYO_CONFIG_USE_DEFAULT
;
621 for (mode
= 0; mode
< 4; mode
++)
622 if (strstr(value
, tomoyo_mode
[mode
]))
624 * Update lower 3 bits in order to distinguish
625 * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
627 config
= (config
& ~7) | mode
;
628 if (config
!= TOMOYO_CONFIG_USE_DEFAULT
) {
629 switch (tomoyo_find_yesno(value
, "grant_log")) {
631 config
|= TOMOYO_CONFIG_WANT_GRANT_LOG
;
634 config
&= ~TOMOYO_CONFIG_WANT_GRANT_LOG
;
637 switch (tomoyo_find_yesno(value
, "reject_log")) {
639 config
|= TOMOYO_CONFIG_WANT_REJECT_LOG
;
642 config
&= ~TOMOYO_CONFIG_WANT_REJECT_LOG
;
647 if (i
< TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
)
648 profile
->config
[i
] = config
;
649 else if (config
!= TOMOYO_CONFIG_USE_DEFAULT
)
650 profile
->default_config
= config
;
655 * tomoyo_write_profile - Write profile table.
657 * @head: Pointer to "struct tomoyo_io_buffer".
659 * Returns 0 on success, negative value otherwise.
661 static int tomoyo_write_profile(struct tomoyo_io_buffer
*head
)
663 char *data
= head
->write_buf
;
666 struct tomoyo_profile
*profile
;
667 if (sscanf(data
, "PROFILE_VERSION=%u", &head
->w
.ns
->profile_version
)
670 i
= simple_strtoul(data
, &cp
, 10);
674 profile
= tomoyo_assign_profile(head
->w
.ns
, i
);
677 cp
= strchr(data
, '=');
681 if (!strcmp(data
, "COMMENT")) {
682 static DEFINE_SPINLOCK(lock
);
683 const struct tomoyo_path_info
*new_comment
684 = tomoyo_get_name(cp
);
685 const struct tomoyo_path_info
*old_comment
;
689 old_comment
= profile
->comment
;
690 profile
->comment
= new_comment
;
692 tomoyo_put_name(old_comment
);
695 if (!strcmp(data
, "PREFERENCE")) {
696 for (i
= 0; i
< TOMOYO_MAX_PREF
; i
++)
697 tomoyo_set_uint(&profile
->pref
[i
], cp
,
698 tomoyo_pref_keywords
[i
]);
701 return tomoyo_set_mode(data
, cp
, profile
);
705 * tomoyo_print_config - Print mode for specified functionality.
707 * @head: Pointer to "struct tomoyo_io_buffer".
708 * @config: Mode for that functionality.
712 * Caller prints functionality's name.
714 static void tomoyo_print_config(struct tomoyo_io_buffer
*head
, const u8 config
)
716 tomoyo_io_printf(head
, "={ mode=%s grant_log=%s reject_log=%s }\n",
717 tomoyo_mode
[config
& 3],
718 tomoyo_yesno(config
& TOMOYO_CONFIG_WANT_GRANT_LOG
),
719 tomoyo_yesno(config
& TOMOYO_CONFIG_WANT_REJECT_LOG
));
723 * tomoyo_read_profile - Read profile table.
725 * @head: Pointer to "struct tomoyo_io_buffer".
729 static void tomoyo_read_profile(struct tomoyo_io_buffer
*head
)
732 struct tomoyo_policy_namespace
*ns
=
733 container_of(head
->r
.ns
, typeof(*ns
), namespace_list
);
734 const struct tomoyo_profile
*profile
;
738 index
= head
->r
.index
;
739 profile
= ns
->profile_ptr
[index
];
740 switch (head
->r
.step
) {
742 tomoyo_print_namespace(head
);
743 tomoyo_io_printf(head
, "PROFILE_VERSION=%u\n",
744 ns
->profile_version
);
748 for ( ; head
->r
.index
< TOMOYO_MAX_PROFILES
;
750 if (ns
->profile_ptr
[head
->r
.index
])
752 if (head
->r
.index
== TOMOYO_MAX_PROFILES
) {
761 const struct tomoyo_path_info
*comment
=
763 tomoyo_print_namespace(head
);
764 tomoyo_io_printf(head
, "%u-COMMENT=", index
);
765 tomoyo_set_string(head
, comment
? comment
->name
: "");
767 tomoyo_print_namespace(head
);
768 tomoyo_io_printf(head
, "%u-PREFERENCE={ ", index
);
769 for (i
= 0; i
< TOMOYO_MAX_PREF
; i
++)
770 tomoyo_io_printf(head
, "%s=%u ",
771 tomoyo_pref_keywords
[i
],
773 tomoyo_set_string(head
, "}\n");
779 tomoyo_print_namespace(head
);
780 tomoyo_io_printf(head
, "%u-%s", index
, "CONFIG");
781 tomoyo_print_config(head
, profile
->default_config
);
787 for ( ; head
->r
.bit
< TOMOYO_MAX_MAC_INDEX
788 + TOMOYO_MAX_MAC_CATEGORY_INDEX
; head
->r
.bit
++) {
789 const u8 i
= head
->r
.bit
;
790 const u8 config
= profile
->config
[i
];
791 if (config
== TOMOYO_CONFIG_USE_DEFAULT
)
793 tomoyo_print_namespace(head
);
794 if (i
< TOMOYO_MAX_MAC_INDEX
)
795 tomoyo_io_printf(head
, "%u-CONFIG::%s::%s",
797 tomoyo_category_keywords
798 [tomoyo_index2category
[i
]],
799 tomoyo_mac_keywords
[i
]);
801 tomoyo_io_printf(head
, "%u-CONFIG::%s", index
,
802 tomoyo_mac_keywords
[i
]);
803 tomoyo_print_config(head
, config
);
807 if (head
->r
.bit
== TOMOYO_MAX_MAC_INDEX
808 + TOMOYO_MAX_MAC_CATEGORY_INDEX
) {
814 if (tomoyo_flush(head
))
819 * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry.
821 * @a: Pointer to "struct tomoyo_acl_head".
822 * @b: Pointer to "struct tomoyo_acl_head".
824 * Returns true if @a == @b, false otherwise.
826 static bool tomoyo_same_manager(const struct tomoyo_acl_head
*a
,
827 const struct tomoyo_acl_head
*b
)
829 return container_of(a
, struct tomoyo_manager
, head
)->manager
==
830 container_of(b
, struct tomoyo_manager
, head
)->manager
;
834 * tomoyo_update_manager_entry - Add a manager entry.
836 * @manager: The path to manager or the domainnamme.
837 * @is_delete: True if it is a delete request.
839 * Returns 0 on success, negative value otherwise.
841 * Caller holds tomoyo_read_lock().
843 static int tomoyo_update_manager_entry(const char *manager
,
844 const bool is_delete
)
846 struct tomoyo_manager e
= { };
847 struct tomoyo_acl_param param
= {
848 /* .ns = &tomoyo_kernel_namespace, */
849 .is_delete
= is_delete
,
850 .list
= &tomoyo_kernel_namespace
.
851 policy_list
[TOMOYO_ID_MANAGER
],
853 int error
= is_delete
? -ENOENT
: -ENOMEM
;
854 if (!tomoyo_correct_domain(manager
) &&
855 !tomoyo_correct_word(manager
))
857 e
.manager
= tomoyo_get_name(manager
);
859 error
= tomoyo_update_policy(&e
.head
, sizeof(e
), ¶m
,
860 tomoyo_same_manager
);
861 tomoyo_put_name(e
.manager
);
867 * tomoyo_write_manager - Write manager policy.
869 * @head: Pointer to "struct tomoyo_io_buffer".
871 * Returns 0 on success, negative value otherwise.
873 * Caller holds tomoyo_read_lock().
875 static int tomoyo_write_manager(struct tomoyo_io_buffer
*head
)
877 char *data
= head
->write_buf
;
879 if (!strcmp(data
, "manage_by_non_root")) {
880 tomoyo_manage_by_non_root
= !head
->w
.is_delete
;
883 return tomoyo_update_manager_entry(data
, head
->w
.is_delete
);
887 * tomoyo_read_manager - Read manager policy.
889 * @head: Pointer to "struct tomoyo_io_buffer".
891 * Caller holds tomoyo_read_lock().
893 static void tomoyo_read_manager(struct tomoyo_io_buffer
*head
)
897 list_for_each_cookie(head
->r
.acl
, &tomoyo_kernel_namespace
.
898 policy_list
[TOMOYO_ID_MANAGER
]) {
899 struct tomoyo_manager
*ptr
=
900 list_entry(head
->r
.acl
, typeof(*ptr
), head
.list
);
901 if (ptr
->head
.is_deleted
)
903 if (!tomoyo_flush(head
))
905 tomoyo_set_string(head
, ptr
->manager
->name
);
912 * tomoyo_manager - Check whether the current process is a policy manager.
914 * Returns true if the current process is permitted to modify policy
915 * via /sys/kernel/security/tomoyo/ interface.
917 * Caller holds tomoyo_read_lock().
919 static bool tomoyo_manager(void)
921 struct tomoyo_manager
*ptr
;
923 const struct task_struct
*task
= current
;
924 const struct tomoyo_path_info
*domainname
= tomoyo_domain()->domainname
;
927 if (!tomoyo_policy_loaded
)
929 if (!tomoyo_manage_by_non_root
&&
930 (!uid_eq(task
->cred
->uid
, GLOBAL_ROOT_UID
) ||
931 !uid_eq(task
->cred
->euid
, GLOBAL_ROOT_UID
)))
933 exe
= tomoyo_get_exe();
936 list_for_each_entry_rcu(ptr
, &tomoyo_kernel_namespace
.
937 policy_list
[TOMOYO_ID_MANAGER
], head
.list
) {
938 if (!ptr
->head
.is_deleted
&&
939 (!tomoyo_pathcmp(domainname
, ptr
->manager
) ||
940 !strcmp(exe
, ptr
->manager
->name
))) {
945 if (!found
) { /* Reduce error messages. */
946 static pid_t last_pid
;
947 const pid_t pid
= current
->pid
;
948 if (last_pid
!= pid
) {
949 printk(KERN_WARNING
"%s ( %s ) is not permitted to "
950 "update policies.\n", domainname
->name
, exe
);
958 static struct tomoyo_domain_info
*tomoyo_find_domain_by_qid
959 (unsigned int serial
);
962 * tomoyo_select_domain - Parse select command.
964 * @head: Pointer to "struct tomoyo_io_buffer".
965 * @data: String to parse.
967 * Returns true on success, false otherwise.
969 * Caller holds tomoyo_read_lock().
971 static bool tomoyo_select_domain(struct tomoyo_io_buffer
*head
,
975 struct tomoyo_domain_info
*domain
= NULL
;
976 bool global_pid
= false;
977 if (strncmp(data
, "select ", 7))
980 if (sscanf(data
, "pid=%u", &pid
) == 1 ||
981 (global_pid
= true, sscanf(data
, "global-pid=%u", &pid
) == 1)) {
982 struct task_struct
*p
;
985 p
= find_task_by_pid_ns(pid
, &init_pid_ns
);
987 p
= find_task_by_vpid(pid
);
989 domain
= tomoyo_real_domain(p
);
991 } else if (!strncmp(data
, "domain=", 7)) {
992 if (tomoyo_domain_def(data
+ 7))
993 domain
= tomoyo_find_domain(data
+ 7);
994 } else if (sscanf(data
, "Q=%u", &pid
) == 1) {
995 domain
= tomoyo_find_domain_by_qid(pid
);
998 head
->w
.domain
= domain
;
999 /* Accessing read_buf is safe because head->io_sem is held. */
1000 if (!head
->read_buf
)
1001 return true; /* Do nothing if open(O_WRONLY). */
1002 memset(&head
->r
, 0, sizeof(head
->r
));
1003 head
->r
.print_this_domain_only
= true;
1005 head
->r
.domain
= &domain
->list
;
1008 tomoyo_io_printf(head
, "# select %s\n", data
);
1009 if (domain
&& domain
->is_deleted
)
1010 tomoyo_io_printf(head
, "# This is a deleted domain.\n");
1015 * tomoyo_same_task_acl - Check for duplicated "struct tomoyo_task_acl" entry.
1017 * @a: Pointer to "struct tomoyo_acl_info".
1018 * @b: Pointer to "struct tomoyo_acl_info".
1020 * Returns true if @a == @b, false otherwise.
1022 static bool tomoyo_same_task_acl(const struct tomoyo_acl_info
*a
,
1023 const struct tomoyo_acl_info
*b
)
1025 const struct tomoyo_task_acl
*p1
= container_of(a
, typeof(*p1
), head
);
1026 const struct tomoyo_task_acl
*p2
= container_of(b
, typeof(*p2
), head
);
1027 return p1
->domainname
== p2
->domainname
;
1031 * tomoyo_write_task - Update task related list.
1033 * @param: Pointer to "struct tomoyo_acl_param".
1035 * Returns 0 on success, negative value otherwise.
1037 * Caller holds tomoyo_read_lock().
1039 static int tomoyo_write_task(struct tomoyo_acl_param
*param
)
1041 int error
= -EINVAL
;
1042 if (tomoyo_str_starts(¶m
->data
, "manual_domain_transition ")) {
1043 struct tomoyo_task_acl e
= {
1044 .head
.type
= TOMOYO_TYPE_MANUAL_TASK_ACL
,
1045 .domainname
= tomoyo_get_domainname(param
),
1048 error
= tomoyo_update_domain(&e
.head
, sizeof(e
), param
,
1049 tomoyo_same_task_acl
,
1051 tomoyo_put_name(e
.domainname
);
1057 * tomoyo_delete_domain - Delete a domain.
1059 * @domainname: The name of domain.
1061 * Returns 0 on success, negative value otherwise.
1063 * Caller holds tomoyo_read_lock().
1065 static int tomoyo_delete_domain(char *domainname
)
1067 struct tomoyo_domain_info
*domain
;
1068 struct tomoyo_path_info name
;
1070 name
.name
= domainname
;
1071 tomoyo_fill_path_info(&name
);
1072 if (mutex_lock_interruptible(&tomoyo_policy_lock
))
1074 /* Is there an active domain? */
1075 list_for_each_entry_rcu(domain
, &tomoyo_domain_list
, list
) {
1076 /* Never delete tomoyo_kernel_domain */
1077 if (domain
== &tomoyo_kernel_domain
)
1079 if (domain
->is_deleted
||
1080 tomoyo_pathcmp(domain
->domainname
, &name
))
1082 domain
->is_deleted
= true;
1085 mutex_unlock(&tomoyo_policy_lock
);
1090 * tomoyo_write_domain2 - Write domain policy.
1092 * @ns: Pointer to "struct tomoyo_policy_namespace".
1093 * @list: Pointer to "struct list_head".
1094 * @data: Policy to be interpreted.
1095 * @is_delete: True if it is a delete request.
1097 * Returns 0 on success, negative value otherwise.
1099 * Caller holds tomoyo_read_lock().
1101 static int tomoyo_write_domain2(struct tomoyo_policy_namespace
*ns
,
1102 struct list_head
*list
, char *data
,
1103 const bool is_delete
)
1105 struct tomoyo_acl_param param
= {
1109 .is_delete
= is_delete
,
1111 static const struct {
1112 const char *keyword
;
1113 int (*write
) (struct tomoyo_acl_param
*);
1114 } tomoyo_callback
[5] = {
1115 { "file ", tomoyo_write_file
},
1116 { "network inet ", tomoyo_write_inet_network
},
1117 { "network unix ", tomoyo_write_unix_network
},
1118 { "misc ", tomoyo_write_misc
},
1119 { "task ", tomoyo_write_task
},
1123 for (i
= 0; i
< ARRAY_SIZE(tomoyo_callback
); i
++) {
1124 if (!tomoyo_str_starts(¶m
.data
,
1125 tomoyo_callback
[i
].keyword
))
1127 return tomoyo_callback
[i
].write(¶m
);
1132 /* String table for domain flags. */
1133 const char * const tomoyo_dif
[TOMOYO_MAX_DOMAIN_INFO_FLAGS
] = {
1134 [TOMOYO_DIF_QUOTA_WARNED
] = "quota_exceeded\n",
1135 [TOMOYO_DIF_TRANSITION_FAILED
] = "transition_failed\n",
1139 * tomoyo_write_domain - Write domain policy.
1141 * @head: Pointer to "struct tomoyo_io_buffer".
1143 * Returns 0 on success, negative value otherwise.
1145 * Caller holds tomoyo_read_lock().
1147 static int tomoyo_write_domain(struct tomoyo_io_buffer
*head
)
1149 char *data
= head
->write_buf
;
1150 struct tomoyo_policy_namespace
*ns
;
1151 struct tomoyo_domain_info
*domain
= head
->w
.domain
;
1152 const bool is_delete
= head
->w
.is_delete
;
1153 bool is_select
= !is_delete
&& tomoyo_str_starts(&data
, "select ");
1154 unsigned int profile
;
1159 ret
= tomoyo_delete_domain(data
);
1161 domain
= tomoyo_find_domain(data
);
1163 domain
= tomoyo_assign_domain(data
, false);
1164 head
->w
.domain
= domain
;
1170 if (sscanf(data
, "use_profile %u", &profile
) == 1
1171 && profile
< TOMOYO_MAX_PROFILES
) {
1172 if (!tomoyo_policy_loaded
|| ns
->profile_ptr
[profile
])
1173 domain
->profile
= (u8
) profile
;
1176 if (sscanf(data
, "use_group %u\n", &profile
) == 1
1177 && profile
< TOMOYO_MAX_ACL_GROUPS
) {
1179 domain
->group
= (u8
) profile
;
1182 for (profile
= 0; profile
< TOMOYO_MAX_DOMAIN_INFO_FLAGS
; profile
++) {
1183 const char *cp
= tomoyo_dif
[profile
];
1184 if (strncmp(data
, cp
, strlen(cp
) - 1))
1186 domain
->flags
[profile
] = !is_delete
;
1189 return tomoyo_write_domain2(ns
, &domain
->acl_info_list
, data
,
1194 * tomoyo_print_condition - Print condition part.
1196 * @head: Pointer to "struct tomoyo_io_buffer".
1197 * @cond: Pointer to "struct tomoyo_condition".
1199 * Returns true on success, false otherwise.
1201 static bool tomoyo_print_condition(struct tomoyo_io_buffer
*head
,
1202 const struct tomoyo_condition
*cond
)
1204 switch (head
->r
.cond_step
) {
1206 head
->r
.cond_index
= 0;
1207 head
->r
.cond_step
++;
1208 if (cond
->transit
) {
1209 tomoyo_set_space(head
);
1210 tomoyo_set_string(head
, cond
->transit
->name
);
1215 const u16 condc
= cond
->condc
;
1216 const struct tomoyo_condition_element
*condp
=
1217 (typeof(condp
)) (cond
+ 1);
1218 const struct tomoyo_number_union
*numbers_p
=
1219 (typeof(numbers_p
)) (condp
+ condc
);
1220 const struct tomoyo_name_union
*names_p
=
1222 (numbers_p
+ cond
->numbers_count
);
1223 const struct tomoyo_argv
*argv
=
1224 (typeof(argv
)) (names_p
+ cond
->names_count
);
1225 const struct tomoyo_envp
*envp
=
1226 (typeof(envp
)) (argv
+ cond
->argc
);
1228 for (skip
= 0; skip
< head
->r
.cond_index
; skip
++) {
1229 const u8 left
= condp
->left
;
1230 const u8 right
= condp
->right
;
1233 case TOMOYO_ARGV_ENTRY
:
1236 case TOMOYO_ENVP_ENTRY
:
1239 case TOMOYO_NUMBER_UNION
:
1244 case TOMOYO_NAME_UNION
:
1247 case TOMOYO_NUMBER_UNION
:
1252 while (head
->r
.cond_index
< condc
) {
1253 const u8 match
= condp
->equals
;
1254 const u8 left
= condp
->left
;
1255 const u8 right
= condp
->right
;
1256 if (!tomoyo_flush(head
))
1259 head
->r
.cond_index
++;
1260 tomoyo_set_space(head
);
1262 case TOMOYO_ARGV_ENTRY
:
1263 tomoyo_io_printf(head
,
1264 "exec.argv[%lu]%s=\"",
1267 tomoyo_set_string(head
,
1269 tomoyo_set_string(head
, "\"");
1272 case TOMOYO_ENVP_ENTRY
:
1273 tomoyo_set_string(head
,
1275 tomoyo_set_string(head
,
1277 tomoyo_io_printf(head
, "\"]%s=", envp
->
1280 tomoyo_set_string(head
, "\"");
1281 tomoyo_set_string(head
, envp
->
1283 tomoyo_set_string(head
, "\"");
1285 tomoyo_set_string(head
,
1290 case TOMOYO_NUMBER_UNION
:
1291 tomoyo_print_number_union_nospace
1292 (head
, numbers_p
++);
1295 tomoyo_set_string(head
,
1296 tomoyo_condition_keyword
[left
]);
1299 tomoyo_set_string(head
, match
? "=" : "!=");
1301 case TOMOYO_NAME_UNION
:
1302 tomoyo_print_name_union_quoted
1305 case TOMOYO_NUMBER_UNION
:
1306 tomoyo_print_number_union_nospace
1307 (head
, numbers_p
++);
1310 tomoyo_set_string(head
,
1311 tomoyo_condition_keyword
[right
]);
1316 head
->r
.cond_step
++;
1319 if (!tomoyo_flush(head
))
1321 head
->r
.cond_step
++;
1324 if (cond
->grant_log
!= TOMOYO_GRANTLOG_AUTO
)
1325 tomoyo_io_printf(head
, " grant_log=%s",
1326 tomoyo_yesno(cond
->grant_log
==
1327 TOMOYO_GRANTLOG_YES
));
1328 tomoyo_set_lf(head
);
1335 * tomoyo_set_group - Print "acl_group " header keyword and category name.
1337 * @head: Pointer to "struct tomoyo_io_buffer".
1338 * @category: Category name.
1342 static void tomoyo_set_group(struct tomoyo_io_buffer
*head
,
1343 const char *category
)
1345 if (head
->type
== TOMOYO_EXCEPTIONPOLICY
) {
1346 tomoyo_print_namespace(head
);
1347 tomoyo_io_printf(head
, "acl_group %u ",
1348 head
->r
.acl_group_index
);
1350 tomoyo_set_string(head
, category
);
1354 * tomoyo_print_entry - Print an ACL entry.
1356 * @head: Pointer to "struct tomoyo_io_buffer".
1357 * @acl: Pointer to an ACL entry.
1359 * Returns true on success, false otherwise.
1361 static bool tomoyo_print_entry(struct tomoyo_io_buffer
*head
,
1362 struct tomoyo_acl_info
*acl
)
1364 const u8 acl_type
= acl
->type
;
1368 if (head
->r
.print_cond_part
)
1369 goto print_cond_part
;
1370 if (acl
->is_deleted
)
1372 if (!tomoyo_flush(head
))
1374 else if (acl_type
== TOMOYO_TYPE_PATH_ACL
) {
1375 struct tomoyo_path_acl
*ptr
=
1376 container_of(acl
, typeof(*ptr
), head
);
1377 const u16 perm
= ptr
->perm
;
1378 for (bit
= 0; bit
< TOMOYO_MAX_PATH_OPERATION
; bit
++) {
1379 if (!(perm
& (1 << bit
)))
1381 if (head
->r
.print_transition_related_only
&&
1382 bit
!= TOMOYO_TYPE_EXECUTE
)
1385 tomoyo_set_group(head
, "file ");
1388 tomoyo_set_slash(head
);
1390 tomoyo_set_string(head
, tomoyo_path_keyword
[bit
]);
1394 tomoyo_print_name_union(head
, &ptr
->name
);
1395 } else if (acl_type
== TOMOYO_TYPE_MANUAL_TASK_ACL
) {
1396 struct tomoyo_task_acl
*ptr
=
1397 container_of(acl
, typeof(*ptr
), head
);
1398 tomoyo_set_group(head
, "task ");
1399 tomoyo_set_string(head
, "manual_domain_transition ");
1400 tomoyo_set_string(head
, ptr
->domainname
->name
);
1401 } else if (head
->r
.print_transition_related_only
) {
1403 } else if (acl_type
== TOMOYO_TYPE_PATH2_ACL
) {
1404 struct tomoyo_path2_acl
*ptr
=
1405 container_of(acl
, typeof(*ptr
), head
);
1406 const u8 perm
= ptr
->perm
;
1407 for (bit
= 0; bit
< TOMOYO_MAX_PATH2_OPERATION
; bit
++) {
1408 if (!(perm
& (1 << bit
)))
1411 tomoyo_set_group(head
, "file ");
1414 tomoyo_set_slash(head
);
1416 tomoyo_set_string(head
, tomoyo_mac_keywords
1417 [tomoyo_pp2mac
[bit
]]);
1421 tomoyo_print_name_union(head
, &ptr
->name1
);
1422 tomoyo_print_name_union(head
, &ptr
->name2
);
1423 } else if (acl_type
== TOMOYO_TYPE_PATH_NUMBER_ACL
) {
1424 struct tomoyo_path_number_acl
*ptr
=
1425 container_of(acl
, typeof(*ptr
), head
);
1426 const u8 perm
= ptr
->perm
;
1427 for (bit
= 0; bit
< TOMOYO_MAX_PATH_NUMBER_OPERATION
; bit
++) {
1428 if (!(perm
& (1 << bit
)))
1431 tomoyo_set_group(head
, "file ");
1434 tomoyo_set_slash(head
);
1436 tomoyo_set_string(head
, tomoyo_mac_keywords
1437 [tomoyo_pn2mac
[bit
]]);
1441 tomoyo_print_name_union(head
, &ptr
->name
);
1442 tomoyo_print_number_union(head
, &ptr
->number
);
1443 } else if (acl_type
== TOMOYO_TYPE_MKDEV_ACL
) {
1444 struct tomoyo_mkdev_acl
*ptr
=
1445 container_of(acl
, typeof(*ptr
), head
);
1446 const u8 perm
= ptr
->perm
;
1447 for (bit
= 0; bit
< TOMOYO_MAX_MKDEV_OPERATION
; bit
++) {
1448 if (!(perm
& (1 << bit
)))
1451 tomoyo_set_group(head
, "file ");
1454 tomoyo_set_slash(head
);
1456 tomoyo_set_string(head
, tomoyo_mac_keywords
1457 [tomoyo_pnnn2mac
[bit
]]);
1461 tomoyo_print_name_union(head
, &ptr
->name
);
1462 tomoyo_print_number_union(head
, &ptr
->mode
);
1463 tomoyo_print_number_union(head
, &ptr
->major
);
1464 tomoyo_print_number_union(head
, &ptr
->minor
);
1465 } else if (acl_type
== TOMOYO_TYPE_INET_ACL
) {
1466 struct tomoyo_inet_acl
*ptr
=
1467 container_of(acl
, typeof(*ptr
), head
);
1468 const u8 perm
= ptr
->perm
;
1470 for (bit
= 0; bit
< TOMOYO_MAX_NETWORK_OPERATION
; bit
++) {
1471 if (!(perm
& (1 << bit
)))
1474 tomoyo_set_group(head
, "network inet ");
1475 tomoyo_set_string(head
, tomoyo_proto_keyword
1477 tomoyo_set_space(head
);
1480 tomoyo_set_slash(head
);
1482 tomoyo_set_string(head
, tomoyo_socket_keyword
[bit
]);
1486 tomoyo_set_space(head
);
1487 if (ptr
->address
.group
) {
1488 tomoyo_set_string(head
, "@");
1489 tomoyo_set_string(head
, ptr
->address
.group
->group_name
1493 tomoyo_print_ip(buf
, sizeof(buf
), &ptr
->address
);
1494 tomoyo_io_printf(head
, "%s", buf
);
1496 tomoyo_print_number_union(head
, &ptr
->port
);
1497 } else if (acl_type
== TOMOYO_TYPE_UNIX_ACL
) {
1498 struct tomoyo_unix_acl
*ptr
=
1499 container_of(acl
, typeof(*ptr
), head
);
1500 const u8 perm
= ptr
->perm
;
1502 for (bit
= 0; bit
< TOMOYO_MAX_NETWORK_OPERATION
; bit
++) {
1503 if (!(perm
& (1 << bit
)))
1506 tomoyo_set_group(head
, "network unix ");
1507 tomoyo_set_string(head
, tomoyo_proto_keyword
1509 tomoyo_set_space(head
);
1512 tomoyo_set_slash(head
);
1514 tomoyo_set_string(head
, tomoyo_socket_keyword
[bit
]);
1518 tomoyo_print_name_union(head
, &ptr
->name
);
1519 } else if (acl_type
== TOMOYO_TYPE_MOUNT_ACL
) {
1520 struct tomoyo_mount_acl
*ptr
=
1521 container_of(acl
, typeof(*ptr
), head
);
1522 tomoyo_set_group(head
, "file mount");
1523 tomoyo_print_name_union(head
, &ptr
->dev_name
);
1524 tomoyo_print_name_union(head
, &ptr
->dir_name
);
1525 tomoyo_print_name_union(head
, &ptr
->fs_type
);
1526 tomoyo_print_number_union(head
, &ptr
->flags
);
1527 } else if (acl_type
== TOMOYO_TYPE_ENV_ACL
) {
1528 struct tomoyo_env_acl
*ptr
=
1529 container_of(acl
, typeof(*ptr
), head
);
1531 tomoyo_set_group(head
, "misc env ");
1532 tomoyo_set_string(head
, ptr
->env
->name
);
1535 head
->r
.print_cond_part
= true;
1536 head
->r
.cond_step
= 0;
1537 if (!tomoyo_flush(head
))
1540 if (!tomoyo_print_condition(head
, acl
->cond
))
1542 head
->r
.print_cond_part
= false;
1544 tomoyo_set_lf(head
);
1550 * tomoyo_read_domain2 - Read domain policy.
1552 * @head: Pointer to "struct tomoyo_io_buffer".
1553 * @list: Pointer to "struct list_head".
1555 * Caller holds tomoyo_read_lock().
1557 * Returns true on success, false otherwise.
1559 static bool tomoyo_read_domain2(struct tomoyo_io_buffer
*head
,
1560 struct list_head
*list
)
1562 list_for_each_cookie(head
->r
.acl
, list
) {
1563 struct tomoyo_acl_info
*ptr
=
1564 list_entry(head
->r
.acl
, typeof(*ptr
), list
);
1565 if (!tomoyo_print_entry(head
, ptr
))
1573 * tomoyo_read_domain - Read domain policy.
1575 * @head: Pointer to "struct tomoyo_io_buffer".
1577 * Caller holds tomoyo_read_lock().
1579 static void tomoyo_read_domain(struct tomoyo_io_buffer
*head
)
1583 list_for_each_cookie(head
->r
.domain
, &tomoyo_domain_list
) {
1584 struct tomoyo_domain_info
*domain
=
1585 list_entry(head
->r
.domain
, typeof(*domain
), list
);
1586 switch (head
->r
.step
) {
1589 if (domain
->is_deleted
&&
1590 !head
->r
.print_this_domain_only
)
1592 /* Print domainname and flags. */
1593 tomoyo_set_string(head
, domain
->domainname
->name
);
1594 tomoyo_set_lf(head
);
1595 tomoyo_io_printf(head
, "use_profile %u\n",
1597 tomoyo_io_printf(head
, "use_group %u\n",
1599 for (i
= 0; i
< TOMOYO_MAX_DOMAIN_INFO_FLAGS
; i
++)
1600 if (domain
->flags
[i
])
1601 tomoyo_set_string(head
, tomoyo_dif
[i
]);
1603 tomoyo_set_lf(head
);
1606 if (!tomoyo_read_domain2(head
, &domain
->acl_info_list
))
1609 if (!tomoyo_set_lf(head
))
1614 if (head
->r
.print_this_domain_only
)
1623 * tomoyo_write_pid: Specify PID to obtain domainname.
1625 * @head: Pointer to "struct tomoyo_io_buffer".
1629 static int tomoyo_write_pid(struct tomoyo_io_buffer
*head
)
1631 head
->r
.eof
= false;
1636 * tomoyo_read_pid - Get domainname of the specified PID.
1638 * @head: Pointer to "struct tomoyo_io_buffer".
1640 * Returns the domainname which the specified PID is in on success,
1641 * empty string otherwise.
1642 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1643 * using read()/write() interface rather than sysctl() interface.
1645 static void tomoyo_read_pid(struct tomoyo_io_buffer
*head
)
1647 char *buf
= head
->write_buf
;
1648 bool global_pid
= false;
1650 struct task_struct
*p
;
1651 struct tomoyo_domain_info
*domain
= NULL
;
1653 /* Accessing write_buf is safe because head->io_sem is held. */
1656 return; /* Do nothing if open(O_RDONLY). */
1658 if (head
->r
.w_pos
|| head
->r
.eof
)
1661 if (tomoyo_str_starts(&buf
, "global-pid "))
1663 if (kstrtouint(buf
, 10, &pid
))
1667 p
= find_task_by_pid_ns(pid
, &init_pid_ns
);
1669 p
= find_task_by_vpid(pid
);
1671 domain
= tomoyo_real_domain(p
);
1675 tomoyo_io_printf(head
, "%u %u ", pid
, domain
->profile
);
1676 tomoyo_set_string(head
, domain
->domainname
->name
);
1679 /* String table for domain transition control keywords. */
1680 static const char *tomoyo_transition_type
[TOMOYO_MAX_TRANSITION_TYPE
] = {
1681 [TOMOYO_TRANSITION_CONTROL_NO_RESET
] = "no_reset_domain ",
1682 [TOMOYO_TRANSITION_CONTROL_RESET
] = "reset_domain ",
1683 [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE
] = "no_initialize_domain ",
1684 [TOMOYO_TRANSITION_CONTROL_INITIALIZE
] = "initialize_domain ",
1685 [TOMOYO_TRANSITION_CONTROL_NO_KEEP
] = "no_keep_domain ",
1686 [TOMOYO_TRANSITION_CONTROL_KEEP
] = "keep_domain ",
1689 /* String table for grouping keywords. */
1690 static const char *tomoyo_group_name
[TOMOYO_MAX_GROUP
] = {
1691 [TOMOYO_PATH_GROUP
] = "path_group ",
1692 [TOMOYO_NUMBER_GROUP
] = "number_group ",
1693 [TOMOYO_ADDRESS_GROUP
] = "address_group ",
1697 * tomoyo_write_exception - Write exception policy.
1699 * @head: Pointer to "struct tomoyo_io_buffer".
1701 * Returns 0 on success, negative value otherwise.
1703 * Caller holds tomoyo_read_lock().
1705 static int tomoyo_write_exception(struct tomoyo_io_buffer
*head
)
1707 const bool is_delete
= head
->w
.is_delete
;
1708 struct tomoyo_acl_param param
= {
1710 .is_delete
= is_delete
,
1711 .data
= head
->write_buf
,
1714 if (tomoyo_str_starts(¶m
.data
, "aggregator "))
1715 return tomoyo_write_aggregator(¶m
);
1716 for (i
= 0; i
< TOMOYO_MAX_TRANSITION_TYPE
; i
++)
1717 if (tomoyo_str_starts(¶m
.data
, tomoyo_transition_type
[i
]))
1718 return tomoyo_write_transition_control(¶m
, i
);
1719 for (i
= 0; i
< TOMOYO_MAX_GROUP
; i
++)
1720 if (tomoyo_str_starts(¶m
.data
, tomoyo_group_name
[i
]))
1721 return tomoyo_write_group(¶m
, i
);
1722 if (tomoyo_str_starts(¶m
.data
, "acl_group ")) {
1725 group
= simple_strtoul(param
.data
, &data
, 10);
1726 if (group
< TOMOYO_MAX_ACL_GROUPS
&& *data
++ == ' ')
1727 return tomoyo_write_domain2
1728 (head
->w
.ns
, &head
->w
.ns
->acl_group
[group
],
1735 * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
1737 * @head: Pointer to "struct tomoyo_io_buffer".
1738 * @idx: Index number.
1740 * Returns true on success, false otherwise.
1742 * Caller holds tomoyo_read_lock().
1744 static bool tomoyo_read_group(struct tomoyo_io_buffer
*head
, const int idx
)
1746 struct tomoyo_policy_namespace
*ns
=
1747 container_of(head
->r
.ns
, typeof(*ns
), namespace_list
);
1748 struct list_head
*list
= &ns
->group_list
[idx
];
1749 list_for_each_cookie(head
->r
.group
, list
) {
1750 struct tomoyo_group
*group
=
1751 list_entry(head
->r
.group
, typeof(*group
), head
.list
);
1752 list_for_each_cookie(head
->r
.acl
, &group
->member_list
) {
1753 struct tomoyo_acl_head
*ptr
=
1754 list_entry(head
->r
.acl
, typeof(*ptr
), list
);
1755 if (ptr
->is_deleted
)
1757 if (!tomoyo_flush(head
))
1759 tomoyo_print_namespace(head
);
1760 tomoyo_set_string(head
, tomoyo_group_name
[idx
]);
1761 tomoyo_set_string(head
, group
->group_name
->name
);
1762 if (idx
== TOMOYO_PATH_GROUP
) {
1763 tomoyo_set_space(head
);
1764 tomoyo_set_string(head
, container_of
1765 (ptr
, struct tomoyo_path_group
,
1766 head
)->member_name
->name
);
1767 } else if (idx
== TOMOYO_NUMBER_GROUP
) {
1768 tomoyo_print_number_union(head
, &container_of
1770 struct tomoyo_number_group
,
1772 } else if (idx
== TOMOYO_ADDRESS_GROUP
) {
1775 struct tomoyo_address_group
*member
=
1776 container_of(ptr
, typeof(*member
),
1778 tomoyo_print_ip(buffer
, sizeof(buffer
),
1780 tomoyo_io_printf(head
, " %s", buffer
);
1782 tomoyo_set_lf(head
);
1786 head
->r
.group
= NULL
;
1791 * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
1793 * @head: Pointer to "struct tomoyo_io_buffer".
1794 * @idx: Index number.
1796 * Returns true on success, false otherwise.
1798 * Caller holds tomoyo_read_lock().
1800 static bool tomoyo_read_policy(struct tomoyo_io_buffer
*head
, const int idx
)
1802 struct tomoyo_policy_namespace
*ns
=
1803 container_of(head
->r
.ns
, typeof(*ns
), namespace_list
);
1804 struct list_head
*list
= &ns
->policy_list
[idx
];
1805 list_for_each_cookie(head
->r
.acl
, list
) {
1806 struct tomoyo_acl_head
*acl
=
1807 container_of(head
->r
.acl
, typeof(*acl
), list
);
1808 if (acl
->is_deleted
)
1810 if (!tomoyo_flush(head
))
1813 case TOMOYO_ID_TRANSITION_CONTROL
:
1815 struct tomoyo_transition_control
*ptr
=
1816 container_of(acl
, typeof(*ptr
), head
);
1817 tomoyo_print_namespace(head
);
1818 tomoyo_set_string(head
, tomoyo_transition_type
1820 tomoyo_set_string(head
, ptr
->program
?
1821 ptr
->program
->name
: "any");
1822 tomoyo_set_string(head
, " from ");
1823 tomoyo_set_string(head
, ptr
->domainname
?
1824 ptr
->domainname
->name
:
1828 case TOMOYO_ID_AGGREGATOR
:
1830 struct tomoyo_aggregator
*ptr
=
1831 container_of(acl
, typeof(*ptr
), head
);
1832 tomoyo_print_namespace(head
);
1833 tomoyo_set_string(head
, "aggregator ");
1834 tomoyo_set_string(head
,
1835 ptr
->original_name
->name
);
1836 tomoyo_set_space(head
);
1837 tomoyo_set_string(head
,
1838 ptr
->aggregated_name
->name
);
1844 tomoyo_set_lf(head
);
1851 * tomoyo_read_exception - Read exception policy.
1853 * @head: Pointer to "struct tomoyo_io_buffer".
1855 * Caller holds tomoyo_read_lock().
1857 static void tomoyo_read_exception(struct tomoyo_io_buffer
*head
)
1859 struct tomoyo_policy_namespace
*ns
=
1860 container_of(head
->r
.ns
, typeof(*ns
), namespace_list
);
1863 while (head
->r
.step
< TOMOYO_MAX_POLICY
&&
1864 tomoyo_read_policy(head
, head
->r
.step
))
1866 if (head
->r
.step
< TOMOYO_MAX_POLICY
)
1868 while (head
->r
.step
< TOMOYO_MAX_POLICY
+ TOMOYO_MAX_GROUP
&&
1869 tomoyo_read_group(head
, head
->r
.step
- TOMOYO_MAX_POLICY
))
1871 if (head
->r
.step
< TOMOYO_MAX_POLICY
+ TOMOYO_MAX_GROUP
)
1873 while (head
->r
.step
< TOMOYO_MAX_POLICY
+ TOMOYO_MAX_GROUP
1874 + TOMOYO_MAX_ACL_GROUPS
) {
1875 head
->r
.acl_group_index
= head
->r
.step
- TOMOYO_MAX_POLICY
1877 if (!tomoyo_read_domain2(head
, &ns
->acl_group
1878 [head
->r
.acl_group_index
]))
1885 /* Wait queue for kernel -> userspace notification. */
1886 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait
);
1887 /* Wait queue for userspace -> kernel notification. */
1888 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait
);
1890 /* Structure for query. */
1891 struct tomoyo_query
{
1892 struct list_head list
;
1893 struct tomoyo_domain_info
*domain
;
1896 unsigned int serial
;
1902 /* The list for "struct tomoyo_query". */
1903 static LIST_HEAD(tomoyo_query_list
);
1905 /* Lock for manipulating tomoyo_query_list. */
1906 static DEFINE_SPINLOCK(tomoyo_query_list_lock
);
1909 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1912 static atomic_t tomoyo_query_observers
= ATOMIC_INIT(0);
1915 * tomoyo_truncate - Truncate a line.
1917 * @str: String to truncate.
1919 * Returns length of truncated @str.
1921 static int tomoyo_truncate(char *str
)
1924 while (*(unsigned char *) str
> (unsigned char) ' ')
1927 return strlen(start
) + 1;
1931 * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
1933 * @domain: Pointer to "struct tomoyo_domain_info".
1934 * @header: Lines containing ACL.
1938 static void tomoyo_add_entry(struct tomoyo_domain_info
*domain
, char *header
)
1941 char *realpath
= NULL
;
1943 char *symlink
= NULL
;
1944 char *cp
= strchr(header
, '\n');
1948 cp
= strchr(cp
+ 1, '\n');
1952 len
= strlen(cp
) + 1;
1953 /* strstr() will return NULL if ordering is wrong. */
1955 argv0
= strstr(header
, " argv[]={ \"");
1958 len
+= tomoyo_truncate(argv0
) + 14;
1960 realpath
= strstr(header
, " exec={ realpath=\"");
1963 len
+= tomoyo_truncate(realpath
) + 6;
1965 symlink
= strstr(header
, " symlink.target=\"");
1967 len
+= tomoyo_truncate(symlink
+ 1) + 1;
1969 buffer
= kmalloc(len
, GFP_NOFS
);
1972 snprintf(buffer
, len
- 1, "%s", cp
);
1974 tomoyo_addprintf(buffer
, len
, " exec.%s", realpath
);
1976 tomoyo_addprintf(buffer
, len
, " exec.argv[0]=%s", argv0
);
1978 tomoyo_addprintf(buffer
, len
, "%s", symlink
);
1979 tomoyo_normalize_line(buffer
);
1980 if (!tomoyo_write_domain2(domain
->ns
, &domain
->acl_info_list
, buffer
,
1982 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES
);
1987 * tomoyo_supervisor - Ask for the supervisor's decision.
1989 * @r: Pointer to "struct tomoyo_request_info".
1990 * @fmt: The printf()'s format string, followed by parameters.
1992 * Returns 0 if the supervisor decided to permit the access request which
1993 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
1994 * supervisor decided to retry the access request which violated the policy in
1995 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
1997 int tomoyo_supervisor(struct tomoyo_request_info
*r
, const char *fmt
, ...)
2002 static unsigned int tomoyo_serial
;
2003 struct tomoyo_query entry
= { };
2004 bool quota_exceeded
= false;
2005 va_start(args
, fmt
);
2006 len
= vsnprintf((char *) &len
, 1, fmt
, args
) + 1;
2008 /* Write /sys/kernel/security/tomoyo/audit. */
2009 va_start(args
, fmt
);
2010 tomoyo_write_log2(r
, len
, fmt
, args
);
2012 /* Nothing more to do if granted. */
2016 tomoyo_update_stat(r
->mode
);
2018 case TOMOYO_CONFIG_ENFORCING
:
2020 if (atomic_read(&tomoyo_query_observers
))
2023 case TOMOYO_CONFIG_LEARNING
:
2025 /* Check max_learning_entry parameter. */
2026 if (tomoyo_domain_quota_is_ok(r
))
2033 va_start(args
, fmt
);
2034 entry
.query
= tomoyo_init_log(r
, len
, fmt
, args
);
2038 entry
.query_len
= strlen(entry
.query
) + 1;
2040 tomoyo_add_entry(r
->domain
, entry
.query
);
2043 len
= tomoyo_round2(entry
.query_len
);
2044 entry
.domain
= r
->domain
;
2045 spin_lock(&tomoyo_query_list_lock
);
2046 if (tomoyo_memory_quota
[TOMOYO_MEMORY_QUERY
] &&
2047 tomoyo_memory_used
[TOMOYO_MEMORY_QUERY
] + len
2048 >= tomoyo_memory_quota
[TOMOYO_MEMORY_QUERY
]) {
2049 quota_exceeded
= true;
2051 entry
.serial
= tomoyo_serial
++;
2052 entry
.retry
= r
->retry
;
2053 tomoyo_memory_used
[TOMOYO_MEMORY_QUERY
] += len
;
2054 list_add_tail(&entry
.list
, &tomoyo_query_list
);
2056 spin_unlock(&tomoyo_query_list_lock
);
2059 /* Give 10 seconds for supervisor's opinion. */
2060 while (entry
.timer
< 10) {
2061 wake_up_all(&tomoyo_query_wait
);
2062 if (wait_event_interruptible_timeout
2063 (tomoyo_answer_wait
, entry
.answer
||
2064 !atomic_read(&tomoyo_query_observers
), HZ
))
2069 spin_lock(&tomoyo_query_list_lock
);
2070 list_del(&entry
.list
);
2071 tomoyo_memory_used
[TOMOYO_MEMORY_QUERY
] -= len
;
2072 spin_unlock(&tomoyo_query_list_lock
);
2073 switch (entry
.answer
) {
2074 case 3: /* Asked to retry by administrator. */
2075 error
= TOMOYO_RETRY_REQUEST
;
2079 /* Granted by administrator. */
2083 /* Timed out or rejected by administrator. */
2092 * tomoyo_find_domain_by_qid - Get domain by query id.
2094 * @serial: Query ID assigned by tomoyo_supervisor().
2096 * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
2098 static struct tomoyo_domain_info
*tomoyo_find_domain_by_qid
2099 (unsigned int serial
)
2101 struct tomoyo_query
*ptr
;
2102 struct tomoyo_domain_info
*domain
= NULL
;
2103 spin_lock(&tomoyo_query_list_lock
);
2104 list_for_each_entry(ptr
, &tomoyo_query_list
, list
) {
2105 if (ptr
->serial
!= serial
)
2107 domain
= ptr
->domain
;
2110 spin_unlock(&tomoyo_query_list_lock
);
2115 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
2117 * @file: Pointer to "struct file".
2118 * @wait: Pointer to "poll_table".
2120 * Returns EPOLLIN | EPOLLRDNORM when ready to read, 0 otherwise.
2122 * Waits for access requests which violated policy in enforcing mode.
2124 static __poll_t
tomoyo_poll_query(struct file
*file
, poll_table
*wait
)
2126 if (!list_empty(&tomoyo_query_list
))
2127 return EPOLLIN
| EPOLLRDNORM
;
2128 poll_wait(file
, &tomoyo_query_wait
, wait
);
2129 if (!list_empty(&tomoyo_query_list
))
2130 return EPOLLIN
| EPOLLRDNORM
;
2135 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
2137 * @head: Pointer to "struct tomoyo_io_buffer".
2139 static void tomoyo_read_query(struct tomoyo_io_buffer
*head
)
2141 struct list_head
*tmp
;
2142 unsigned int pos
= 0;
2147 if (head
->read_buf
) {
2148 kfree(head
->read_buf
);
2149 head
->read_buf
= NULL
;
2151 spin_lock(&tomoyo_query_list_lock
);
2152 list_for_each(tmp
, &tomoyo_query_list
) {
2153 struct tomoyo_query
*ptr
= list_entry(tmp
, typeof(*ptr
), list
);
2154 if (pos
++ != head
->r
.query_index
)
2156 len
= ptr
->query_len
;
2159 spin_unlock(&tomoyo_query_list_lock
);
2161 head
->r
.query_index
= 0;
2164 buf
= kzalloc(len
+ 32, GFP_NOFS
);
2168 spin_lock(&tomoyo_query_list_lock
);
2169 list_for_each(tmp
, &tomoyo_query_list
) {
2170 struct tomoyo_query
*ptr
= list_entry(tmp
, typeof(*ptr
), list
);
2171 if (pos
++ != head
->r
.query_index
)
2174 * Some query can be skipped because tomoyo_query_list
2175 * can change, but I don't care.
2177 if (len
== ptr
->query_len
)
2178 snprintf(buf
, len
+ 31, "Q%u-%hu\n%s", ptr
->serial
,
2179 ptr
->retry
, ptr
->query
);
2182 spin_unlock(&tomoyo_query_list_lock
);
2184 head
->read_buf
= buf
;
2185 head
->r
.w
[head
->r
.w_pos
++] = buf
;
2186 head
->r
.query_index
++;
2193 * tomoyo_write_answer - Write the supervisor's decision.
2195 * @head: Pointer to "struct tomoyo_io_buffer".
2197 * Returns 0 on success, -EINVAL otherwise.
2199 static int tomoyo_write_answer(struct tomoyo_io_buffer
*head
)
2201 char *data
= head
->write_buf
;
2202 struct list_head
*tmp
;
2203 unsigned int serial
;
2204 unsigned int answer
;
2205 spin_lock(&tomoyo_query_list_lock
);
2206 list_for_each(tmp
, &tomoyo_query_list
) {
2207 struct tomoyo_query
*ptr
= list_entry(tmp
, typeof(*ptr
), list
);
2210 spin_unlock(&tomoyo_query_list_lock
);
2211 if (sscanf(data
, "A%u=%u", &serial
, &answer
) != 2)
2213 spin_lock(&tomoyo_query_list_lock
);
2214 list_for_each(tmp
, &tomoyo_query_list
) {
2215 struct tomoyo_query
*ptr
= list_entry(tmp
, typeof(*ptr
), list
);
2216 if (ptr
->serial
!= serial
)
2218 ptr
->answer
= answer
;
2219 /* Remove from tomoyo_query_list. */
2221 list_del_init(&ptr
->list
);
2224 spin_unlock(&tomoyo_query_list_lock
);
2229 * tomoyo_read_version: Get version.
2231 * @head: Pointer to "struct tomoyo_io_buffer".
2233 * Returns version information.
2235 static void tomoyo_read_version(struct tomoyo_io_buffer
*head
)
2238 tomoyo_io_printf(head
, "2.5.0");
2243 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2244 static const char * const tomoyo_policy_headers
[TOMOYO_MAX_POLICY_STAT
] = {
2245 [TOMOYO_STAT_POLICY_UPDATES
] = "update:",
2246 [TOMOYO_STAT_POLICY_LEARNING
] = "violation in learning mode:",
2247 [TOMOYO_STAT_POLICY_PERMISSIVE
] = "violation in permissive mode:",
2248 [TOMOYO_STAT_POLICY_ENFORCING
] = "violation in enforcing mode:",
2251 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2252 static const char * const tomoyo_memory_headers
[TOMOYO_MAX_MEMORY_STAT
] = {
2253 [TOMOYO_MEMORY_POLICY
] = "policy:",
2254 [TOMOYO_MEMORY_AUDIT
] = "audit log:",
2255 [TOMOYO_MEMORY_QUERY
] = "query message:",
2258 /* Timestamp counter for last updated. */
2259 static unsigned int tomoyo_stat_updated
[TOMOYO_MAX_POLICY_STAT
];
2260 /* Counter for number of updates. */
2261 static time64_t tomoyo_stat_modified
[TOMOYO_MAX_POLICY_STAT
];
2264 * tomoyo_update_stat - Update statistic counters.
2266 * @index: Index for policy type.
2270 void tomoyo_update_stat(const u8 index
)
2273 * I don't use atomic operations because race condition is not fatal.
2275 tomoyo_stat_updated
[index
]++;
2276 tomoyo_stat_modified
[index
] = ktime_get_real_seconds();
2280 * tomoyo_read_stat - Read statistic data.
2282 * @head: Pointer to "struct tomoyo_io_buffer".
2286 static void tomoyo_read_stat(struct tomoyo_io_buffer
*head
)
2289 unsigned int total
= 0;
2292 for (i
= 0; i
< TOMOYO_MAX_POLICY_STAT
; i
++) {
2293 tomoyo_io_printf(head
, "Policy %-30s %10u",
2294 tomoyo_policy_headers
[i
],
2295 tomoyo_stat_updated
[i
]);
2296 if (tomoyo_stat_modified
[i
]) {
2297 struct tomoyo_time stamp
;
2298 tomoyo_convert_time(tomoyo_stat_modified
[i
], &stamp
);
2299 tomoyo_io_printf(head
, " (Last: %04u/%02u/%02u "
2301 stamp
.year
, stamp
.month
, stamp
.day
,
2302 stamp
.hour
, stamp
.min
, stamp
.sec
);
2304 tomoyo_set_lf(head
);
2306 for (i
= 0; i
< TOMOYO_MAX_MEMORY_STAT
; i
++) {
2307 unsigned int used
= tomoyo_memory_used
[i
];
2309 tomoyo_io_printf(head
, "Memory used by %-22s %10u",
2310 tomoyo_memory_headers
[i
], used
);
2311 used
= tomoyo_memory_quota
[i
];
2313 tomoyo_io_printf(head
, " (Quota: %10u)", used
);
2314 tomoyo_set_lf(head
);
2316 tomoyo_io_printf(head
, "Total memory used: %10u\n",
2322 * tomoyo_write_stat - Set memory quota.
2324 * @head: Pointer to "struct tomoyo_io_buffer".
2328 static int tomoyo_write_stat(struct tomoyo_io_buffer
*head
)
2330 char *data
= head
->write_buf
;
2332 if (tomoyo_str_starts(&data
, "Memory used by "))
2333 for (i
= 0; i
< TOMOYO_MAX_MEMORY_STAT
; i
++)
2334 if (tomoyo_str_starts(&data
, tomoyo_memory_headers
[i
]))
2335 sscanf(data
, "%u", &tomoyo_memory_quota
[i
]);
2340 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
2342 * @type: Type of interface.
2343 * @file: Pointer to "struct file".
2345 * Returns 0 on success, negative value otherwise.
2347 int tomoyo_open_control(const u8 type
, struct file
*file
)
2349 struct tomoyo_io_buffer
*head
= kzalloc(sizeof(*head
), GFP_NOFS
);
2353 mutex_init(&head
->io_sem
);
2356 case TOMOYO_DOMAINPOLICY
:
2357 /* /sys/kernel/security/tomoyo/domain_policy */
2358 head
->write
= tomoyo_write_domain
;
2359 head
->read
= tomoyo_read_domain
;
2361 case TOMOYO_EXCEPTIONPOLICY
:
2362 /* /sys/kernel/security/tomoyo/exception_policy */
2363 head
->write
= tomoyo_write_exception
;
2364 head
->read
= tomoyo_read_exception
;
2367 /* /sys/kernel/security/tomoyo/audit */
2368 head
->poll
= tomoyo_poll_log
;
2369 head
->read
= tomoyo_read_log
;
2371 case TOMOYO_PROCESS_STATUS
:
2372 /* /sys/kernel/security/tomoyo/.process_status */
2373 head
->write
= tomoyo_write_pid
;
2374 head
->read
= tomoyo_read_pid
;
2376 case TOMOYO_VERSION
:
2377 /* /sys/kernel/security/tomoyo/version */
2378 head
->read
= tomoyo_read_version
;
2379 head
->readbuf_size
= 128;
2382 /* /sys/kernel/security/tomoyo/stat */
2383 head
->write
= tomoyo_write_stat
;
2384 head
->read
= tomoyo_read_stat
;
2385 head
->readbuf_size
= 1024;
2387 case TOMOYO_PROFILE
:
2388 /* /sys/kernel/security/tomoyo/profile */
2389 head
->write
= tomoyo_write_profile
;
2390 head
->read
= tomoyo_read_profile
;
2392 case TOMOYO_QUERY
: /* /sys/kernel/security/tomoyo/query */
2393 head
->poll
= tomoyo_poll_query
;
2394 head
->write
= tomoyo_write_answer
;
2395 head
->read
= tomoyo_read_query
;
2397 case TOMOYO_MANAGER
:
2398 /* /sys/kernel/security/tomoyo/manager */
2399 head
->write
= tomoyo_write_manager
;
2400 head
->read
= tomoyo_read_manager
;
2403 if (!(file
->f_mode
& FMODE_READ
)) {
2405 * No need to allocate read_buf since it is not opened
2410 } else if (!head
->poll
) {
2411 /* Don't allocate read_buf for poll() access. */
2412 if (!head
->readbuf_size
)
2413 head
->readbuf_size
= 4096 * 2;
2414 head
->read_buf
= kzalloc(head
->readbuf_size
, GFP_NOFS
);
2415 if (!head
->read_buf
) {
2420 if (!(file
->f_mode
& FMODE_WRITE
)) {
2422 * No need to allocate write_buf since it is not opened
2426 } else if (head
->write
) {
2427 head
->writebuf_size
= 4096 * 2;
2428 head
->write_buf
= kzalloc(head
->writebuf_size
, GFP_NOFS
);
2429 if (!head
->write_buf
) {
2430 kfree(head
->read_buf
);
2436 * If the file is /sys/kernel/security/tomoyo/query , increment the
2438 * The obserber counter is used by tomoyo_supervisor() to see if
2439 * there is some process monitoring /sys/kernel/security/tomoyo/query.
2441 if (type
== TOMOYO_QUERY
)
2442 atomic_inc(&tomoyo_query_observers
);
2443 file
->private_data
= head
;
2444 tomoyo_notify_gc(head
, true);
2449 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
2451 * @file: Pointer to "struct file".
2452 * @wait: Pointer to "poll_table". Maybe NULL.
2454 * Returns EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM if ready to read/write,
2455 * EPOLLOUT | EPOLLWRNORM otherwise.
2457 __poll_t
tomoyo_poll_control(struct file
*file
, poll_table
*wait
)
2459 struct tomoyo_io_buffer
*head
= file
->private_data
;
2461 return head
->poll(file
, wait
) | EPOLLOUT
| EPOLLWRNORM
;
2462 return EPOLLIN
| EPOLLRDNORM
| EPOLLOUT
| EPOLLWRNORM
;
2466 * tomoyo_set_namespace_cursor - Set namespace to read.
2468 * @head: Pointer to "struct tomoyo_io_buffer".
2472 static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer
*head
)
2474 struct list_head
*ns
;
2475 if (head
->type
!= TOMOYO_EXCEPTIONPOLICY
&&
2476 head
->type
!= TOMOYO_PROFILE
)
2479 * If this is the first read, or reading previous namespace finished
2480 * and has more namespaces to read, update the namespace cursor.
2483 if (!ns
|| (head
->r
.eof
&& ns
->next
!= &tomoyo_namespace_list
)) {
2484 /* Clearing is OK because tomoyo_flush() returned true. */
2485 memset(&head
->r
, 0, sizeof(head
->r
));
2486 head
->r
.ns
= ns
? ns
->next
: tomoyo_namespace_list
.next
;
2491 * tomoyo_has_more_namespace - Check for unread namespaces.
2493 * @head: Pointer to "struct tomoyo_io_buffer".
2495 * Returns true if we have more entries to print, false otherwise.
2497 static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer
*head
)
2499 return (head
->type
== TOMOYO_EXCEPTIONPOLICY
||
2500 head
->type
== TOMOYO_PROFILE
) && head
->r
.eof
&&
2501 head
->r
.ns
->next
!= &tomoyo_namespace_list
;
2505 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
2507 * @head: Pointer to "struct tomoyo_io_buffer".
2508 * @buffer: Poiner to buffer to write to.
2509 * @buffer_len: Size of @buffer.
2511 * Returns bytes read on success, negative value otherwise.
2513 ssize_t
tomoyo_read_control(struct tomoyo_io_buffer
*head
, char __user
*buffer
,
2514 const int buffer_len
)
2521 if (mutex_lock_interruptible(&head
->io_sem
))
2523 head
->read_user_buf
= buffer
;
2524 head
->read_user_buf_avail
= buffer_len
;
2525 idx
= tomoyo_read_lock();
2526 if (tomoyo_flush(head
))
2527 /* Call the policy handler. */
2529 tomoyo_set_namespace_cursor(head
);
2531 } while (tomoyo_flush(head
) &&
2532 tomoyo_has_more_namespace(head
));
2533 tomoyo_read_unlock(idx
);
2534 len
= head
->read_user_buf
- buffer
;
2535 mutex_unlock(&head
->io_sem
);
2540 * tomoyo_parse_policy - Parse a policy line.
2542 * @head: Poiter to "struct tomoyo_io_buffer".
2543 * @line: Line to parse.
2545 * Returns 0 on success, negative value otherwise.
2547 * Caller holds tomoyo_read_lock().
2549 static int tomoyo_parse_policy(struct tomoyo_io_buffer
*head
, char *line
)
2551 /* Delete request? */
2552 head
->w
.is_delete
= !strncmp(line
, "delete ", 7);
2553 if (head
->w
.is_delete
)
2554 memmove(line
, line
+ 7, strlen(line
+ 7) + 1);
2555 /* Selecting namespace to update. */
2556 if (head
->type
== TOMOYO_EXCEPTIONPOLICY
||
2557 head
->type
== TOMOYO_PROFILE
) {
2559 char *cp
= strchr(line
, ' ');
2562 head
->w
.ns
= tomoyo_assign_namespace(line
);
2563 memmove(line
, cp
, strlen(cp
) + 1);
2567 head
->w
.ns
= &tomoyo_kernel_namespace
;
2568 /* Don't allow updating if namespace is invalid. */
2572 /* Do the update. */
2573 return head
->write(head
);
2577 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
2579 * @head: Pointer to "struct tomoyo_io_buffer".
2580 * @buffer: Pointer to buffer to read from.
2581 * @buffer_len: Size of @buffer.
2583 * Returns @buffer_len on success, negative value otherwise.
2585 ssize_t
tomoyo_write_control(struct tomoyo_io_buffer
*head
,
2586 const char __user
*buffer
, const int buffer_len
)
2588 int error
= buffer_len
;
2589 size_t avail_len
= buffer_len
;
2590 char *cp0
= head
->write_buf
;
2594 if (!access_ok(VERIFY_READ
, buffer
, buffer_len
))
2596 if (mutex_lock_interruptible(&head
->io_sem
))
2598 head
->read_user_buf_avail
= 0;
2599 idx
= tomoyo_read_lock();
2600 /* Read a line and dispatch it to the policy handler. */
2601 while (avail_len
> 0) {
2603 if (head
->w
.avail
>= head
->writebuf_size
- 1) {
2604 const int len
= head
->writebuf_size
* 2;
2605 char *cp
= kzalloc(len
, GFP_NOFS
);
2610 memmove(cp
, cp0
, head
->w
.avail
);
2612 head
->write_buf
= cp
;
2614 head
->writebuf_size
= len
;
2616 if (get_user(c
, buffer
)) {
2622 cp0
[head
->w
.avail
++] = c
;
2625 cp0
[head
->w
.avail
- 1] = '\0';
2627 tomoyo_normalize_line(cp0
);
2628 if (!strcmp(cp0
, "reset")) {
2629 head
->w
.ns
= &tomoyo_kernel_namespace
;
2630 head
->w
.domain
= NULL
;
2631 memset(&head
->r
, 0, sizeof(head
->r
));
2634 /* Don't allow updating policies by non manager programs. */
2635 switch (head
->type
) {
2636 case TOMOYO_PROCESS_STATUS
:
2637 /* This does not write anything. */
2639 case TOMOYO_DOMAINPOLICY
:
2640 if (tomoyo_select_domain(head
, cp0
))
2643 case TOMOYO_EXCEPTIONPOLICY
:
2644 if (!strcmp(cp0
, "select transition_only")) {
2645 head
->r
.print_transition_related_only
= true;
2650 if (!tomoyo_manager()) {
2655 switch (tomoyo_parse_policy(head
, cp0
)) {
2660 switch (head
->type
) {
2661 case TOMOYO_DOMAINPOLICY
:
2662 case TOMOYO_EXCEPTIONPOLICY
:
2664 case TOMOYO_PROFILE
:
2665 case TOMOYO_MANAGER
:
2666 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES
);
2675 tomoyo_read_unlock(idx
);
2676 mutex_unlock(&head
->io_sem
);
2681 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
2683 * @head: Pointer to "struct tomoyo_io_buffer".
2685 void tomoyo_close_control(struct tomoyo_io_buffer
*head
)
2688 * If the file is /sys/kernel/security/tomoyo/query , decrement the
2691 if (head
->type
== TOMOYO_QUERY
&&
2692 atomic_dec_and_test(&tomoyo_query_observers
))
2693 wake_up_all(&tomoyo_answer_wait
);
2694 tomoyo_notify_gc(head
, false);
2698 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
2700 void tomoyo_check_profile(void)
2702 struct tomoyo_domain_info
*domain
;
2703 const int idx
= tomoyo_read_lock();
2704 tomoyo_policy_loaded
= true;
2705 printk(KERN_INFO
"TOMOYO: 2.5.0\n");
2706 list_for_each_entry_rcu(domain
, &tomoyo_domain_list
, list
) {
2707 const u8 profile
= domain
->profile
;
2708 const struct tomoyo_policy_namespace
*ns
= domain
->ns
;
2709 if (ns
->profile_version
!= 20110903)
2711 "Profile version %u is not supported.\n",
2712 ns
->profile_version
);
2713 else if (!ns
->profile_ptr
[profile
])
2715 "Profile %u (used by '%s') is not defined.\n",
2716 profile
, domain
->domainname
->name
);
2720 "Userland tools for TOMOYO 2.5 must be installed and "
2721 "policy must be initialized.\n");
2722 printk(KERN_ERR
"Please see http://tomoyo.sourceforge.jp/2.5/ "
2723 "for more information.\n");
2726 tomoyo_read_unlock(idx
);
2727 printk(KERN_INFO
"Mandatory Access Control activated.\n");
2731 * tomoyo_load_builtin_policy - Load built-in policy.
2735 void __init
tomoyo_load_builtin_policy(void)
2738 * This include file is manually created and contains built-in policy
2739 * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy",
2740 * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager",
2741 * "tomoyo_builtin_stat" in the form of "static char [] __initdata".
2743 #include "builtin-policy.h"
2745 const int idx
= tomoyo_read_lock();
2746 for (i
= 0; i
< 5; i
++) {
2747 struct tomoyo_io_buffer head
= { };
2751 start
= tomoyo_builtin_profile
;
2752 head
.type
= TOMOYO_PROFILE
;
2753 head
.write
= tomoyo_write_profile
;
2756 start
= tomoyo_builtin_exception_policy
;
2757 head
.type
= TOMOYO_EXCEPTIONPOLICY
;
2758 head
.write
= tomoyo_write_exception
;
2761 start
= tomoyo_builtin_domain_policy
;
2762 head
.type
= TOMOYO_DOMAINPOLICY
;
2763 head
.write
= tomoyo_write_domain
;
2766 start
= tomoyo_builtin_manager
;
2767 head
.type
= TOMOYO_MANAGER
;
2768 head
.write
= tomoyo_write_manager
;
2771 start
= tomoyo_builtin_stat
;
2772 head
.type
= TOMOYO_STAT
;
2773 head
.write
= tomoyo_write_stat
;
2777 char *end
= strchr(start
, '\n');
2781 tomoyo_normalize_line(start
);
2782 head
.write_buf
= start
;
2783 tomoyo_parse_policy(&head
, start
);
2787 tomoyo_read_unlock(idx
);
2788 #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
2789 tomoyo_check_profile();