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);
202 vsnprintf(buffer + pos, len - pos - 1, fmt, args);
207 * tomoyo_flush - Flush queued string to userspace's buffer.
209 * @head: Pointer to "struct tomoyo_io_buffer".
211 * Returns true if all data was flushed, false otherwise.
213 static bool tomoyo_flush(struct tomoyo_io_buffer *head)
215 while (head->r.w_pos) {
216 const char *w = head->r.w[0];
217 size_t len = strlen(w);
220 if (len > head->read_user_buf_avail)
221 len = head->read_user_buf_avail;
224 if (copy_to_user(head->read_user_buf, w, len))
226 head->read_user_buf_avail -= len;
227 head->read_user_buf += len;
233 /* Add '\0' for audit logs and query. */
235 if (!head->read_user_buf_avail ||
236 copy_to_user(head->read_user_buf, "", 1))
238 head->read_user_buf_avail--;
239 head->read_user_buf++;
242 for (len = 0; len < head->r.w_pos; len++)
243 head->r.w[len] = head->r.w[len + 1];
250 * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure.
252 * @head: Pointer to "struct tomoyo_io_buffer".
253 * @string: String to print.
255 * Note that @string has to be kept valid until @head is kfree()d.
256 * This means that char[] allocated on stack memory cannot be passed to
257 * this function. Use tomoyo_io_printf() for char[] allocated on stack memory.
259 static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string)
261 if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) {
262 head->r.w[head->r.w_pos++] = string;
268 static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt,
272 * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure.
274 * @head: Pointer to "struct tomoyo_io_buffer".
275 * @fmt: The printf()'s format string, followed by parameters.
277 static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt,
282 size_t pos = head->r.avail;
283 int size = head->readbuf_size - pos;
288 len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1;
290 if (pos + len >= head->readbuf_size) {
294 head->r.avail += len;
295 tomoyo_set_string(head, head->read_buf + pos);
299 * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure.
301 * @head: Pointer to "struct tomoyo_io_buffer".
305 static void tomoyo_set_space(struct tomoyo_io_buffer *head)
307 tomoyo_set_string(head, " ");
311 * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure.
313 * @head: Pointer to "struct tomoyo_io_buffer".
317 static bool tomoyo_set_lf(struct tomoyo_io_buffer *head)
319 tomoyo_set_string(head, "\n");
320 return !head->r.w_pos;
324 * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure.
326 * @head: Pointer to "struct tomoyo_io_buffer".
330 static void tomoyo_set_slash(struct tomoyo_io_buffer *head)
332 tomoyo_set_string(head, "/");
335 /* List of namespaces. */
336 LIST_HEAD(tomoyo_namespace_list);
337 /* True if namespace other than tomoyo_kernel_namespace is defined. */
338 static bool tomoyo_namespace_enabled;
341 * tomoyo_init_policy_namespace - Initialize namespace.
343 * @ns: Pointer to "struct tomoyo_policy_namespace".
347 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns)
351 for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++)
352 INIT_LIST_HEAD(&ns->acl_group[idx]);
353 for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++)
354 INIT_LIST_HEAD(&ns->group_list[idx]);
355 for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++)
356 INIT_LIST_HEAD(&ns->policy_list[idx]);
357 ns->profile_version = 20150505;
358 tomoyo_namespace_enabled = !list_empty(&tomoyo_namespace_list);
359 list_add_tail_rcu(&ns->namespace_list, &tomoyo_namespace_list);
363 * tomoyo_print_namespace - Print namespace header.
365 * @head: Pointer to "struct tomoyo_io_buffer".
369 static void tomoyo_print_namespace(struct tomoyo_io_buffer *head)
371 if (!tomoyo_namespace_enabled)
373 tomoyo_set_string(head,
374 container_of(head->r.ns,
375 struct tomoyo_policy_namespace,
376 namespace_list)->name);
377 tomoyo_set_space(head);
381 * tomoyo_print_name_union - Print a tomoyo_name_union.
383 * @head: Pointer to "struct tomoyo_io_buffer".
384 * @ptr: Pointer to "struct tomoyo_name_union".
386 static void tomoyo_print_name_union(struct tomoyo_io_buffer *head,
387 const struct tomoyo_name_union *ptr)
389 tomoyo_set_space(head);
391 tomoyo_set_string(head, "@");
392 tomoyo_set_string(head, ptr->group->group_name->name);
394 tomoyo_set_string(head, ptr->filename->name);
399 * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote.
401 * @head: Pointer to "struct tomoyo_io_buffer".
402 * @ptr: Pointer to "struct tomoyo_name_union".
406 static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer *head,
407 const struct tomoyo_name_union *ptr)
410 tomoyo_set_string(head, "@");
411 tomoyo_set_string(head, ptr->group->group_name->name);
413 tomoyo_set_string(head, "\"");
414 tomoyo_set_string(head, ptr->filename->name);
415 tomoyo_set_string(head, "\"");
420 * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space.
422 * @head: Pointer to "struct tomoyo_io_buffer".
423 * @ptr: Pointer to "struct tomoyo_number_union".
427 static void tomoyo_print_number_union_nospace
428 (struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr)
431 tomoyo_set_string(head, "@");
432 tomoyo_set_string(head, ptr->group->group_name->name);
435 unsigned long min = ptr->values[0];
436 const unsigned long max = ptr->values[1];
437 u8 min_type = ptr->value_type[0];
438 const u8 max_type = ptr->value_type[1];
442 for (i = 0; i < 2; i++) {
444 case TOMOYO_VALUE_TYPE_HEXADECIMAL:
445 tomoyo_addprintf(buffer, sizeof(buffer),
448 case TOMOYO_VALUE_TYPE_OCTAL:
449 tomoyo_addprintf(buffer, sizeof(buffer),
453 tomoyo_addprintf(buffer, sizeof(buffer), "%lu",
457 if (min == max && min_type == max_type)
459 tomoyo_addprintf(buffer, sizeof(buffer), "-");
463 tomoyo_io_printf(head, "%s", buffer);
468 * tomoyo_print_number_union - Print a tomoyo_number_union.
470 * @head: Pointer to "struct tomoyo_io_buffer".
471 * @ptr: Pointer to "struct tomoyo_number_union".
475 static void tomoyo_print_number_union(struct tomoyo_io_buffer *head,
476 const struct tomoyo_number_union *ptr)
478 tomoyo_set_space(head);
479 tomoyo_print_number_union_nospace(head, ptr);
483 * tomoyo_assign_profile - Create a new profile.
485 * @ns: Pointer to "struct tomoyo_policy_namespace".
486 * @profile: Profile number to create.
488 * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
490 static struct tomoyo_profile *tomoyo_assign_profile
491 (struct tomoyo_policy_namespace *ns, const unsigned int profile)
493 struct tomoyo_profile *ptr;
494 struct tomoyo_profile *entry;
496 if (profile >= TOMOYO_MAX_PROFILES)
498 ptr = ns->profile_ptr[profile];
501 entry = kzalloc(sizeof(*entry), GFP_NOFS | __GFP_NOWARN);
502 if (mutex_lock_interruptible(&tomoyo_policy_lock))
504 ptr = ns->profile_ptr[profile];
505 if (!ptr && tomoyo_memory_ok(entry)) {
507 ptr->default_config = TOMOYO_CONFIG_DISABLED |
508 TOMOYO_CONFIG_WANT_GRANT_LOG |
509 TOMOYO_CONFIG_WANT_REJECT_LOG;
510 memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT,
511 sizeof(ptr->config));
512 ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] =
513 CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG;
514 ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] =
515 CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY;
516 mb(); /* Avoid out-of-order execution. */
517 ns->profile_ptr[profile] = ptr;
520 mutex_unlock(&tomoyo_policy_lock);
527 * tomoyo_profile - Find a profile.
529 * @ns: Pointer to "struct tomoyo_policy_namespace".
530 * @profile: Profile number to find.
532 * Returns pointer to "struct tomoyo_profile".
534 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
537 static struct tomoyo_profile tomoyo_null_profile;
538 struct tomoyo_profile *ptr = ns->profile_ptr[profile];
541 ptr = &tomoyo_null_profile;
546 * tomoyo_find_yesno - Find values for specified keyword.
548 * @string: String to check.
549 * @find: Name of keyword.
551 * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
553 static s8 tomoyo_find_yesno(const char *string, const char *find)
555 const char *cp = strstr(string, find);
559 if (!strncmp(cp, "=yes", 4))
561 else if (!strncmp(cp, "=no", 3))
568 * tomoyo_set_uint - Set value for specified preference.
570 * @i: Pointer to "unsigned int".
571 * @string: String to check.
572 * @find: Name of keyword.
576 static void tomoyo_set_uint(unsigned int *i, const char *string,
579 const char *cp = strstr(string, find);
582 sscanf(cp + strlen(find), "=%u", i);
586 * tomoyo_set_mode - Set mode for specified profile.
588 * @name: Name of functionality.
589 * @value: Mode for @name.
590 * @profile: Pointer to "struct tomoyo_profile".
592 * Returns 0 on success, negative value otherwise.
594 static int tomoyo_set_mode(char *name, const char *value,
595 struct tomoyo_profile *profile)
600 if (!strcmp(name, "CONFIG")) {
601 i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX;
602 config = profile->default_config;
603 } else if (tomoyo_str_starts(&name, "CONFIG::")) {
605 for (i = 0; i < TOMOYO_MAX_MAC_INDEX
606 + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) {
609 if (i < TOMOYO_MAX_MAC_INDEX) {
610 const u8 c = tomoyo_index2category[i];
611 const char *category =
612 tomoyo_category_keywords[c];
614 len = strlen(category);
615 if (strncmp(name, category, len) ||
616 name[len++] != ':' || name[len++] != ':')
619 if (strcmp(name + len, tomoyo_mac_keywords[i]))
621 config = profile->config[i];
624 if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
629 if (strstr(value, "use_default")) {
630 config = TOMOYO_CONFIG_USE_DEFAULT;
634 for (mode = 0; mode < 4; mode++)
635 if (strstr(value, tomoyo_mode[mode]))
637 * Update lower 3 bits in order to distinguish
638 * 'config' from 'TOMOYO_CONFIG_USE_DEFAULT'.
640 config = (config & ~7) | mode;
641 if (config != TOMOYO_CONFIG_USE_DEFAULT) {
642 switch (tomoyo_find_yesno(value, "grant_log")) {
644 config |= TOMOYO_CONFIG_WANT_GRANT_LOG;
647 config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG;
650 switch (tomoyo_find_yesno(value, "reject_log")) {
652 config |= TOMOYO_CONFIG_WANT_REJECT_LOG;
655 config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG;
660 if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
661 profile->config[i] = config;
662 else if (config != TOMOYO_CONFIG_USE_DEFAULT)
663 profile->default_config = config;
668 * tomoyo_write_profile - Write profile table.
670 * @head: Pointer to "struct tomoyo_io_buffer".
672 * Returns 0 on success, negative value otherwise.
674 static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
676 char *data = head->write_buf;
679 struct tomoyo_profile *profile;
681 if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version)
684 i = simple_strtoul(data, &cp, 10);
688 profile = tomoyo_assign_profile(head->w.ns, i);
691 cp = strchr(data, '=');
695 if (!strcmp(data, "COMMENT")) {
696 static DEFINE_SPINLOCK(lock);
697 const struct tomoyo_path_info *new_comment
698 = tomoyo_get_name(cp);
699 const struct tomoyo_path_info *old_comment;
704 old_comment = profile->comment;
705 profile->comment = new_comment;
707 tomoyo_put_name(old_comment);
710 if (!strcmp(data, "PREFERENCE")) {
711 for (i = 0; i < TOMOYO_MAX_PREF; i++)
712 tomoyo_set_uint(&profile->pref[i], cp,
713 tomoyo_pref_keywords[i]);
716 return tomoyo_set_mode(data, cp, profile);
720 * tomoyo_print_config - Print mode for specified functionality.
722 * @head: Pointer to "struct tomoyo_io_buffer".
723 * @config: Mode for that functionality.
727 * Caller prints functionality's name.
729 static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config)
731 tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n",
732 tomoyo_mode[config & 3],
733 tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG),
734 tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG));
738 * tomoyo_read_profile - Read profile table.
740 * @head: Pointer to "struct tomoyo_io_buffer".
744 static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
747 struct tomoyo_policy_namespace *ns =
748 container_of(head->r.ns, typeof(*ns), namespace_list);
749 const struct tomoyo_profile *profile;
754 index = head->r.index;
755 profile = ns->profile_ptr[index];
756 switch (head->r.step) {
758 tomoyo_print_namespace(head);
759 tomoyo_io_printf(head, "PROFILE_VERSION=%u\n",
760 ns->profile_version);
764 for ( ; head->r.index < TOMOYO_MAX_PROFILES;
766 if (ns->profile_ptr[head->r.index])
768 if (head->r.index == TOMOYO_MAX_PROFILES) {
777 const struct tomoyo_path_info *comment =
780 tomoyo_print_namespace(head);
781 tomoyo_io_printf(head, "%u-COMMENT=", index);
782 tomoyo_set_string(head, comment ? comment->name : "");
784 tomoyo_print_namespace(head);
785 tomoyo_io_printf(head, "%u-PREFERENCE={ ", index);
786 for (i = 0; i < TOMOYO_MAX_PREF; i++)
787 tomoyo_io_printf(head, "%s=%u ",
788 tomoyo_pref_keywords[i],
790 tomoyo_set_string(head, "}\n");
796 tomoyo_print_namespace(head);
797 tomoyo_io_printf(head, "%u-%s", index, "CONFIG");
798 tomoyo_print_config(head, profile->default_config);
804 for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX
805 + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) {
806 const u8 i = head->r.bit;
807 const u8 config = profile->config[i];
809 if (config == TOMOYO_CONFIG_USE_DEFAULT)
811 tomoyo_print_namespace(head);
812 if (i < TOMOYO_MAX_MAC_INDEX)
813 tomoyo_io_printf(head, "%u-CONFIG::%s::%s",
815 tomoyo_category_keywords
816 [tomoyo_index2category[i]],
817 tomoyo_mac_keywords[i]);
819 tomoyo_io_printf(head, "%u-CONFIG::%s", index,
820 tomoyo_mac_keywords[i]);
821 tomoyo_print_config(head, config);
825 if (head->r.bit == TOMOYO_MAX_MAC_INDEX
826 + TOMOYO_MAX_MAC_CATEGORY_INDEX) {
832 if (tomoyo_flush(head))
837 * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry.
839 * @a: Pointer to "struct tomoyo_acl_head".
840 * @b: Pointer to "struct tomoyo_acl_head".
842 * Returns true if @a == @b, false otherwise.
844 static bool tomoyo_same_manager(const struct tomoyo_acl_head *a,
845 const struct tomoyo_acl_head *b)
847 return container_of(a, struct tomoyo_manager, head)->manager ==
848 container_of(b, struct tomoyo_manager, head)->manager;
852 * tomoyo_update_manager_entry - Add a manager entry.
854 * @manager: The path to manager or the domainnamme.
855 * @is_delete: True if it is a delete request.
857 * Returns 0 on success, negative value otherwise.
859 * Caller holds tomoyo_read_lock().
861 static int tomoyo_update_manager_entry(const char *manager,
862 const bool is_delete)
864 struct tomoyo_manager e = { };
865 struct tomoyo_acl_param param = {
866 /* .ns = &tomoyo_kernel_namespace, */
867 .is_delete = is_delete,
868 .list = &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER],
870 int error = is_delete ? -ENOENT : -ENOMEM;
872 if (!tomoyo_correct_domain(manager) &&
873 !tomoyo_correct_word(manager))
875 e.manager = tomoyo_get_name(manager);
877 error = tomoyo_update_policy(&e.head, sizeof(e), ¶m,
878 tomoyo_same_manager);
879 tomoyo_put_name(e.manager);
885 * tomoyo_write_manager - Write manager policy.
887 * @head: Pointer to "struct tomoyo_io_buffer".
889 * Returns 0 on success, negative value otherwise.
891 * Caller holds tomoyo_read_lock().
893 static int tomoyo_write_manager(struct tomoyo_io_buffer *head)
895 char *data = head->write_buf;
897 if (!strcmp(data, "manage_by_non_root")) {
898 tomoyo_manage_by_non_root = !head->w.is_delete;
901 return tomoyo_update_manager_entry(data, head->w.is_delete);
905 * tomoyo_read_manager - Read manager policy.
907 * @head: Pointer to "struct tomoyo_io_buffer".
909 * Caller holds tomoyo_read_lock().
911 static void tomoyo_read_manager(struct tomoyo_io_buffer *head)
915 list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER]) {
916 struct tomoyo_manager *ptr =
917 list_entry(head->r.acl, typeof(*ptr), head.list);
919 if (ptr->head.is_deleted)
921 if (!tomoyo_flush(head))
923 tomoyo_set_string(head, ptr->manager->name);
930 * tomoyo_manager - Check whether the current process is a policy manager.
932 * Returns true if the current process is permitted to modify policy
933 * via /sys/kernel/security/tomoyo/ interface.
935 * Caller holds tomoyo_read_lock().
937 static bool tomoyo_manager(void)
939 struct tomoyo_manager *ptr;
941 const struct task_struct *task = current;
942 const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname;
943 bool found = IS_ENABLED(CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING);
945 if (!tomoyo_policy_loaded)
947 if (!tomoyo_manage_by_non_root &&
948 (!uid_eq(task->cred->uid, GLOBAL_ROOT_UID) ||
949 !uid_eq(task->cred->euid, GLOBAL_ROOT_UID)))
951 exe = tomoyo_get_exe();
954 list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER], head.list,
955 srcu_read_lock_held(&tomoyo_ss)) {
956 if (!ptr->head.is_deleted &&
957 (!tomoyo_pathcmp(domainname, ptr->manager) ||
958 !strcmp(exe, ptr->manager->name))) {
963 if (!found) { /* Reduce error messages. */
964 static pid_t last_pid;
965 const pid_t pid = current->pid;
967 if (last_pid != pid) {
968 pr_warn("%s ( %s ) is not permitted to update policies.\n",
969 domainname->name, exe);
977 static struct tomoyo_domain_info *tomoyo_find_domain_by_qid
978 (unsigned int serial);
981 * tomoyo_select_domain - Parse select command.
983 * @head: Pointer to "struct tomoyo_io_buffer".
984 * @data: String to parse.
986 * Returns true on success, false otherwise.
988 * Caller holds tomoyo_read_lock().
990 static bool tomoyo_select_domain(struct tomoyo_io_buffer *head,
994 struct tomoyo_domain_info *domain = NULL;
995 bool global_pid = false;
997 if (strncmp(data, "select ", 7))
1000 if (sscanf(data, "pid=%u", &pid) == 1 ||
1001 (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
1002 struct task_struct *p;
1006 p = find_task_by_pid_ns(pid, &init_pid_ns);
1008 p = find_task_by_vpid(pid);
1010 domain = tomoyo_task(p)->domain_info;
1012 } else if (!strncmp(data, "domain=", 7)) {
1013 if (tomoyo_domain_def(data + 7))
1014 domain = tomoyo_find_domain(data + 7);
1015 } else if (sscanf(data, "Q=%u", &pid) == 1) {
1016 domain = tomoyo_find_domain_by_qid(pid);
1019 head->w.domain = domain;
1020 /* Accessing read_buf is safe because head->io_sem is held. */
1021 if (!head->read_buf)
1022 return true; /* Do nothing if open(O_WRONLY). */
1023 memset(&head->r, 0, sizeof(head->r));
1024 head->r.print_this_domain_only = true;
1026 head->r.domain = &domain->list;
1029 tomoyo_io_printf(head, "# select %s\n", data);
1030 if (domain && domain->is_deleted)
1031 tomoyo_io_printf(head, "# This is a deleted domain.\n");
1036 * tomoyo_same_task_acl - Check for duplicated "struct tomoyo_task_acl" entry.
1038 * @a: Pointer to "struct tomoyo_acl_info".
1039 * @b: Pointer to "struct tomoyo_acl_info".
1041 * Returns true if @a == @b, false otherwise.
1043 static bool tomoyo_same_task_acl(const struct tomoyo_acl_info *a,
1044 const struct tomoyo_acl_info *b)
1046 const struct tomoyo_task_acl *p1 = container_of(a, typeof(*p1), head);
1047 const struct tomoyo_task_acl *p2 = container_of(b, typeof(*p2), head);
1049 return p1->domainname == p2->domainname;
1053 * tomoyo_write_task - Update task related list.
1055 * @param: Pointer to "struct tomoyo_acl_param".
1057 * Returns 0 on success, negative value otherwise.
1059 * Caller holds tomoyo_read_lock().
1061 static int tomoyo_write_task(struct tomoyo_acl_param *param)
1063 int error = -EINVAL;
1065 if (tomoyo_str_starts(¶m->data, "manual_domain_transition ")) {
1066 struct tomoyo_task_acl e = {
1067 .head.type = TOMOYO_TYPE_MANUAL_TASK_ACL,
1068 .domainname = tomoyo_get_domainname(param),
1072 error = tomoyo_update_domain(&e.head, sizeof(e), param,
1073 tomoyo_same_task_acl,
1075 tomoyo_put_name(e.domainname);
1081 * tomoyo_delete_domain - Delete a domain.
1083 * @domainname: The name of domain.
1085 * Returns 0 on success, negative value otherwise.
1087 * Caller holds tomoyo_read_lock().
1089 static int tomoyo_delete_domain(char *domainname)
1091 struct tomoyo_domain_info *domain;
1092 struct tomoyo_path_info name;
1094 name.name = domainname;
1095 tomoyo_fill_path_info(&name);
1096 if (mutex_lock_interruptible(&tomoyo_policy_lock))
1098 /* Is there an active domain? */
1099 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list,
1100 srcu_read_lock_held(&tomoyo_ss)) {
1101 /* Never delete tomoyo_kernel_domain */
1102 if (domain == &tomoyo_kernel_domain)
1104 if (domain->is_deleted ||
1105 tomoyo_pathcmp(domain->domainname, &name))
1107 domain->is_deleted = true;
1110 mutex_unlock(&tomoyo_policy_lock);
1115 * tomoyo_write_domain2 - Write domain policy.
1117 * @ns: Pointer to "struct tomoyo_policy_namespace".
1118 * @list: Pointer to "struct list_head".
1119 * @data: Policy to be interpreted.
1120 * @is_delete: True if it is a delete request.
1122 * Returns 0 on success, negative value otherwise.
1124 * Caller holds tomoyo_read_lock().
1126 static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns,
1127 struct list_head *list, char *data,
1128 const bool is_delete)
1130 struct tomoyo_acl_param param = {
1134 .is_delete = is_delete,
1136 static const struct {
1137 const char *keyword;
1138 int (*write)(struct tomoyo_acl_param *param);
1139 } tomoyo_callback[5] = {
1140 { "file ", tomoyo_write_file },
1141 { "network inet ", tomoyo_write_inet_network },
1142 { "network unix ", tomoyo_write_unix_network },
1143 { "misc ", tomoyo_write_misc },
1144 { "task ", tomoyo_write_task },
1148 for (i = 0; i < ARRAY_SIZE(tomoyo_callback); i++) {
1149 if (!tomoyo_str_starts(¶m.data,
1150 tomoyo_callback[i].keyword))
1152 return tomoyo_callback[i].write(¶m);
1157 /* String table for domain flags. */
1158 const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = {
1159 [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n",
1160 [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n",
1164 * tomoyo_write_domain - Write domain policy.
1166 * @head: Pointer to "struct tomoyo_io_buffer".
1168 * Returns 0 on success, negative value otherwise.
1170 * Caller holds tomoyo_read_lock().
1172 static int tomoyo_write_domain(struct tomoyo_io_buffer *head)
1174 char *data = head->write_buf;
1175 struct tomoyo_policy_namespace *ns;
1176 struct tomoyo_domain_info *domain = head->w.domain;
1177 const bool is_delete = head->w.is_delete;
1178 bool is_select = !is_delete && tomoyo_str_starts(&data, "select ");
1186 ret = tomoyo_delete_domain(data);
1188 domain = tomoyo_find_domain(data);
1190 domain = tomoyo_assign_domain(data, false);
1191 head->w.domain = domain;
1197 if (sscanf(data, "use_profile %u", &idx) == 1
1198 && idx < TOMOYO_MAX_PROFILES) {
1199 if (!tomoyo_policy_loaded || ns->profile_ptr[idx])
1201 domain->profile = (u8) idx;
1204 if (sscanf(data, "use_group %u\n", &idx) == 1
1205 && idx < TOMOYO_MAX_ACL_GROUPS) {
1207 set_bit(idx, domain->group);
1209 clear_bit(idx, domain->group);
1212 for (idx = 0; idx < TOMOYO_MAX_DOMAIN_INFO_FLAGS; idx++) {
1213 const char *cp = tomoyo_dif[idx];
1215 if (strncmp(data, cp, strlen(cp) - 1))
1217 domain->flags[idx] = !is_delete;
1220 return tomoyo_write_domain2(ns, &domain->acl_info_list, data,
1225 * tomoyo_print_condition - Print condition part.
1227 * @head: Pointer to "struct tomoyo_io_buffer".
1228 * @cond: Pointer to "struct tomoyo_condition".
1230 * Returns true on success, false otherwise.
1232 static bool tomoyo_print_condition(struct tomoyo_io_buffer *head,
1233 const struct tomoyo_condition *cond)
1235 switch (head->r.cond_step) {
1237 head->r.cond_index = 0;
1238 head->r.cond_step++;
1239 if (cond->transit) {
1240 tomoyo_set_space(head);
1241 tomoyo_set_string(head, cond->transit->name);
1246 const u16 condc = cond->condc;
1247 const struct tomoyo_condition_element *condp =
1248 (typeof(condp)) (cond + 1);
1249 const struct tomoyo_number_union *numbers_p =
1250 (typeof(numbers_p)) (condp + condc);
1251 const struct tomoyo_name_union *names_p =
1253 (numbers_p + cond->numbers_count);
1254 const struct tomoyo_argv *argv =
1255 (typeof(argv)) (names_p + cond->names_count);
1256 const struct tomoyo_envp *envp =
1257 (typeof(envp)) (argv + cond->argc);
1260 for (skip = 0; skip < head->r.cond_index; skip++) {
1261 const u8 left = condp->left;
1262 const u8 right = condp->right;
1266 case TOMOYO_ARGV_ENTRY:
1269 case TOMOYO_ENVP_ENTRY:
1272 case TOMOYO_NUMBER_UNION:
1277 case TOMOYO_NAME_UNION:
1280 case TOMOYO_NUMBER_UNION:
1285 while (head->r.cond_index < condc) {
1286 const u8 match = condp->equals;
1287 const u8 left = condp->left;
1288 const u8 right = condp->right;
1290 if (!tomoyo_flush(head))
1293 head->r.cond_index++;
1294 tomoyo_set_space(head);
1296 case TOMOYO_ARGV_ENTRY:
1297 tomoyo_io_printf(head,
1298 "exec.argv[%lu]%s=\"",
1299 argv->index, argv->is_not ? "!" : "");
1300 tomoyo_set_string(head,
1302 tomoyo_set_string(head, "\"");
1305 case TOMOYO_ENVP_ENTRY:
1306 tomoyo_set_string(head,
1308 tomoyo_set_string(head,
1310 tomoyo_io_printf(head, "\"]%s=", envp->is_not ? "!" : "");
1312 tomoyo_set_string(head, "\"");
1313 tomoyo_set_string(head, envp->value->name);
1314 tomoyo_set_string(head, "\"");
1316 tomoyo_set_string(head,
1321 case TOMOYO_NUMBER_UNION:
1322 tomoyo_print_number_union_nospace
1323 (head, numbers_p++);
1326 tomoyo_set_string(head,
1327 tomoyo_condition_keyword[left]);
1330 tomoyo_set_string(head, match ? "=" : "!=");
1332 case TOMOYO_NAME_UNION:
1333 tomoyo_print_name_union_quoted
1336 case TOMOYO_NUMBER_UNION:
1337 tomoyo_print_number_union_nospace
1338 (head, numbers_p++);
1341 tomoyo_set_string(head,
1342 tomoyo_condition_keyword[right]);
1347 head->r.cond_step++;
1350 if (!tomoyo_flush(head))
1352 head->r.cond_step++;
1355 if (cond->grant_log != TOMOYO_GRANTLOG_AUTO)
1356 tomoyo_io_printf(head, " grant_log=%s",
1357 tomoyo_yesno(cond->grant_log ==
1358 TOMOYO_GRANTLOG_YES));
1359 tomoyo_set_lf(head);
1366 * tomoyo_set_group - Print "acl_group " header keyword and category name.
1368 * @head: Pointer to "struct tomoyo_io_buffer".
1369 * @category: Category name.
1373 static void tomoyo_set_group(struct tomoyo_io_buffer *head,
1374 const char *category)
1376 if (head->type == TOMOYO_EXCEPTIONPOLICY) {
1377 tomoyo_print_namespace(head);
1378 tomoyo_io_printf(head, "acl_group %u ",
1379 head->r.acl_group_index);
1381 tomoyo_set_string(head, category);
1385 * tomoyo_print_entry - Print an ACL entry.
1387 * @head: Pointer to "struct tomoyo_io_buffer".
1388 * @acl: Pointer to an ACL entry.
1390 * Returns true on success, false otherwise.
1392 static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
1393 struct tomoyo_acl_info *acl)
1395 const u8 acl_type = acl->type;
1399 if (head->r.print_cond_part)
1400 goto print_cond_part;
1401 if (acl->is_deleted)
1403 if (!tomoyo_flush(head))
1405 else if (acl_type == TOMOYO_TYPE_PATH_ACL) {
1406 struct tomoyo_path_acl *ptr =
1407 container_of(acl, typeof(*ptr), head);
1408 const u16 perm = ptr->perm;
1410 for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
1411 if (!(perm & (1 << bit)))
1413 if (head->r.print_transition_related_only &&
1414 bit != TOMOYO_TYPE_EXECUTE)
1417 tomoyo_set_group(head, "file ");
1420 tomoyo_set_slash(head);
1422 tomoyo_set_string(head, tomoyo_path_keyword[bit]);
1426 tomoyo_print_name_union(head, &ptr->name);
1427 } else if (acl_type == TOMOYO_TYPE_MANUAL_TASK_ACL) {
1428 struct tomoyo_task_acl *ptr =
1429 container_of(acl, typeof(*ptr), head);
1431 tomoyo_set_group(head, "task ");
1432 tomoyo_set_string(head, "manual_domain_transition ");
1433 tomoyo_set_string(head, ptr->domainname->name);
1434 } else if (head->r.print_transition_related_only) {
1436 } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
1437 struct tomoyo_path2_acl *ptr =
1438 container_of(acl, typeof(*ptr), head);
1439 const u8 perm = ptr->perm;
1441 for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) {
1442 if (!(perm & (1 << bit)))
1445 tomoyo_set_group(head, "file ");
1448 tomoyo_set_slash(head);
1450 tomoyo_set_string(head, tomoyo_mac_keywords
1451 [tomoyo_pp2mac[bit]]);
1455 tomoyo_print_name_union(head, &ptr->name1);
1456 tomoyo_print_name_union(head, &ptr->name2);
1457 } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) {
1458 struct tomoyo_path_number_acl *ptr =
1459 container_of(acl, typeof(*ptr), head);
1460 const u8 perm = ptr->perm;
1462 for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) {
1463 if (!(perm & (1 << bit)))
1466 tomoyo_set_group(head, "file ");
1469 tomoyo_set_slash(head);
1471 tomoyo_set_string(head, tomoyo_mac_keywords
1472 [tomoyo_pn2mac[bit]]);
1476 tomoyo_print_name_union(head, &ptr->name);
1477 tomoyo_print_number_union(head, &ptr->number);
1478 } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
1479 struct tomoyo_mkdev_acl *ptr =
1480 container_of(acl, typeof(*ptr), head);
1481 const u8 perm = ptr->perm;
1483 for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) {
1484 if (!(perm & (1 << bit)))
1487 tomoyo_set_group(head, "file ");
1490 tomoyo_set_slash(head);
1492 tomoyo_set_string(head, tomoyo_mac_keywords
1493 [tomoyo_pnnn2mac[bit]]);
1497 tomoyo_print_name_union(head, &ptr->name);
1498 tomoyo_print_number_union(head, &ptr->mode);
1499 tomoyo_print_number_union(head, &ptr->major);
1500 tomoyo_print_number_union(head, &ptr->minor);
1501 } else if (acl_type == TOMOYO_TYPE_INET_ACL) {
1502 struct tomoyo_inet_acl *ptr =
1503 container_of(acl, typeof(*ptr), head);
1504 const u8 perm = ptr->perm;
1506 for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
1507 if (!(perm & (1 << bit)))
1510 tomoyo_set_group(head, "network inet ");
1511 tomoyo_set_string(head, tomoyo_proto_keyword
1513 tomoyo_set_space(head);
1516 tomoyo_set_slash(head);
1518 tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
1522 tomoyo_set_space(head);
1523 if (ptr->address.group) {
1524 tomoyo_set_string(head, "@");
1525 tomoyo_set_string(head, ptr->address.group->group_name
1530 tomoyo_print_ip(buf, sizeof(buf), &ptr->address);
1531 tomoyo_io_printf(head, "%s", buf);
1533 tomoyo_print_number_union(head, &ptr->port);
1534 } else if (acl_type == TOMOYO_TYPE_UNIX_ACL) {
1535 struct tomoyo_unix_acl *ptr =
1536 container_of(acl, typeof(*ptr), head);
1537 const u8 perm = ptr->perm;
1539 for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
1540 if (!(perm & (1 << bit)))
1543 tomoyo_set_group(head, "network unix ");
1544 tomoyo_set_string(head, tomoyo_proto_keyword
1546 tomoyo_set_space(head);
1549 tomoyo_set_slash(head);
1551 tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
1555 tomoyo_print_name_union(head, &ptr->name);
1556 } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
1557 struct tomoyo_mount_acl *ptr =
1558 container_of(acl, typeof(*ptr), head);
1560 tomoyo_set_group(head, "file mount");
1561 tomoyo_print_name_union(head, &ptr->dev_name);
1562 tomoyo_print_name_union(head, &ptr->dir_name);
1563 tomoyo_print_name_union(head, &ptr->fs_type);
1564 tomoyo_print_number_union(head, &ptr->flags);
1565 } else if (acl_type == TOMOYO_TYPE_ENV_ACL) {
1566 struct tomoyo_env_acl *ptr =
1567 container_of(acl, typeof(*ptr), head);
1569 tomoyo_set_group(head, "misc env ");
1570 tomoyo_set_string(head, ptr->env->name);
1573 head->r.print_cond_part = true;
1574 head->r.cond_step = 0;
1575 if (!tomoyo_flush(head))
1578 if (!tomoyo_print_condition(head, acl->cond))
1580 head->r.print_cond_part = false;
1582 tomoyo_set_lf(head);
1588 * tomoyo_read_domain2 - Read domain policy.
1590 * @head: Pointer to "struct tomoyo_io_buffer".
1591 * @list: Pointer to "struct list_head".
1593 * Caller holds tomoyo_read_lock().
1595 * Returns true on success, false otherwise.
1597 static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head,
1598 struct list_head *list)
1600 list_for_each_cookie(head->r.acl, list) {
1601 struct tomoyo_acl_info *ptr =
1602 list_entry(head->r.acl, typeof(*ptr), list);
1604 if (!tomoyo_print_entry(head, ptr))
1612 * tomoyo_read_domain - Read domain policy.
1614 * @head: Pointer to "struct tomoyo_io_buffer".
1616 * Caller holds tomoyo_read_lock().
1618 static void tomoyo_read_domain(struct tomoyo_io_buffer *head)
1622 list_for_each_cookie(head->r.domain, &tomoyo_domain_list) {
1623 struct tomoyo_domain_info *domain =
1624 list_entry(head->r.domain, typeof(*domain), list);
1627 switch (head->r.step) {
1629 if (domain->is_deleted &&
1630 !head->r.print_this_domain_only)
1632 /* Print domainname and flags. */
1633 tomoyo_set_string(head, domain->domainname->name);
1634 tomoyo_set_lf(head);
1635 tomoyo_io_printf(head, "use_profile %u\n",
1637 for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++)
1638 if (domain->flags[i])
1639 tomoyo_set_string(head, tomoyo_dif[i]);
1644 while (head->r.index < TOMOYO_MAX_ACL_GROUPS) {
1645 i = head->r.index++;
1646 if (!test_bit(i, domain->group))
1648 tomoyo_io_printf(head, "use_group %u\n", i);
1649 if (!tomoyo_flush(head))
1654 tomoyo_set_lf(head);
1657 if (!tomoyo_read_domain2(head, &domain->acl_info_list))
1660 if (!tomoyo_set_lf(head))
1665 if (head->r.print_this_domain_only)
1674 * tomoyo_write_pid: Specify PID to obtain domainname.
1676 * @head: Pointer to "struct tomoyo_io_buffer".
1680 static int tomoyo_write_pid(struct tomoyo_io_buffer *head)
1682 head->r.eof = false;
1687 * tomoyo_read_pid - Get domainname of the specified PID.
1689 * @head: Pointer to "struct tomoyo_io_buffer".
1691 * Returns the domainname which the specified PID is in on success,
1692 * empty string otherwise.
1693 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1694 * using read()/write() interface rather than sysctl() interface.
1696 static void tomoyo_read_pid(struct tomoyo_io_buffer *head)
1698 char *buf = head->write_buf;
1699 bool global_pid = false;
1701 struct task_struct *p;
1702 struct tomoyo_domain_info *domain = NULL;
1704 /* Accessing write_buf is safe because head->io_sem is held. */
1707 return; /* Do nothing if open(O_RDONLY). */
1709 if (head->r.w_pos || head->r.eof)
1712 if (tomoyo_str_starts(&buf, "global-pid "))
1714 if (kstrtouint(buf, 10, &pid))
1718 p = find_task_by_pid_ns(pid, &init_pid_ns);
1720 p = find_task_by_vpid(pid);
1722 domain = tomoyo_task(p)->domain_info;
1726 tomoyo_io_printf(head, "%u %u ", pid, domain->profile);
1727 tomoyo_set_string(head, domain->domainname->name);
1730 /* String table for domain transition control keywords. */
1731 static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = {
1732 [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ",
1733 [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ",
1734 [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ",
1735 [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ",
1736 [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ",
1737 [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ",
1740 /* String table for grouping keywords. */
1741 static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = {
1742 [TOMOYO_PATH_GROUP] = "path_group ",
1743 [TOMOYO_NUMBER_GROUP] = "number_group ",
1744 [TOMOYO_ADDRESS_GROUP] = "address_group ",
1748 * tomoyo_write_exception - Write exception policy.
1750 * @head: Pointer to "struct tomoyo_io_buffer".
1752 * Returns 0 on success, negative value otherwise.
1754 * Caller holds tomoyo_read_lock().
1756 static int tomoyo_write_exception(struct tomoyo_io_buffer *head)
1758 const bool is_delete = head->w.is_delete;
1759 struct tomoyo_acl_param param = {
1761 .is_delete = is_delete,
1762 .data = head->write_buf,
1766 if (tomoyo_str_starts(¶m.data, "aggregator "))
1767 return tomoyo_write_aggregator(¶m);
1768 for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++)
1769 if (tomoyo_str_starts(¶m.data, tomoyo_transition_type[i]))
1770 return tomoyo_write_transition_control(¶m, i);
1771 for (i = 0; i < TOMOYO_MAX_GROUP; i++)
1772 if (tomoyo_str_starts(¶m.data, tomoyo_group_name[i]))
1773 return tomoyo_write_group(¶m, i);
1774 if (tomoyo_str_starts(¶m.data, "acl_group ")) {
1778 group = simple_strtoul(param.data, &data, 10);
1779 if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ')
1780 return tomoyo_write_domain2
1781 (head->w.ns, &head->w.ns->acl_group[group],
1788 * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
1790 * @head: Pointer to "struct tomoyo_io_buffer".
1791 * @idx: Index number.
1793 * Returns true on success, false otherwise.
1795 * Caller holds tomoyo_read_lock().
1797 static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx)
1799 struct tomoyo_policy_namespace *ns =
1800 container_of(head->r.ns, typeof(*ns), namespace_list);
1801 struct list_head *list = &ns->group_list[idx];
1803 list_for_each_cookie(head->r.group, list) {
1804 struct tomoyo_group *group =
1805 list_entry(head->r.group, typeof(*group), head.list);
1807 list_for_each_cookie(head->r.acl, &group->member_list) {
1808 struct tomoyo_acl_head *ptr =
1809 list_entry(head->r.acl, typeof(*ptr), list);
1811 if (ptr->is_deleted)
1813 if (!tomoyo_flush(head))
1815 tomoyo_print_namespace(head);
1816 tomoyo_set_string(head, tomoyo_group_name[idx]);
1817 tomoyo_set_string(head, group->group_name->name);
1818 if (idx == TOMOYO_PATH_GROUP) {
1819 tomoyo_set_space(head);
1820 tomoyo_set_string(head, container_of
1821 (ptr, struct tomoyo_path_group,
1822 head)->member_name->name);
1823 } else if (idx == TOMOYO_NUMBER_GROUP) {
1824 tomoyo_print_number_union(head, &container_of
1826 struct tomoyo_number_group,
1828 } else if (idx == TOMOYO_ADDRESS_GROUP) {
1830 struct tomoyo_address_group *member =
1831 container_of(ptr, typeof(*member),
1834 tomoyo_print_ip(buffer, sizeof(buffer),
1836 tomoyo_io_printf(head, " %s", buffer);
1838 tomoyo_set_lf(head);
1842 head->r.group = NULL;
1847 * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
1849 * @head: Pointer to "struct tomoyo_io_buffer".
1850 * @idx: Index number.
1852 * Returns true on success, false otherwise.
1854 * Caller holds tomoyo_read_lock().
1856 static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx)
1858 struct tomoyo_policy_namespace *ns =
1859 container_of(head->r.ns, typeof(*ns), namespace_list);
1860 struct list_head *list = &ns->policy_list[idx];
1862 list_for_each_cookie(head->r.acl, list) {
1863 struct tomoyo_acl_head *acl =
1864 container_of(head->r.acl, typeof(*acl), list);
1865 if (acl->is_deleted)
1867 if (!tomoyo_flush(head))
1870 case TOMOYO_ID_TRANSITION_CONTROL:
1872 struct tomoyo_transition_control *ptr =
1873 container_of(acl, typeof(*ptr), head);
1875 tomoyo_print_namespace(head);
1876 tomoyo_set_string(head, tomoyo_transition_type
1878 tomoyo_set_string(head, ptr->program ?
1879 ptr->program->name : "any");
1880 tomoyo_set_string(head, " from ");
1881 tomoyo_set_string(head, ptr->domainname ?
1882 ptr->domainname->name :
1886 case TOMOYO_ID_AGGREGATOR:
1888 struct tomoyo_aggregator *ptr =
1889 container_of(acl, typeof(*ptr), head);
1891 tomoyo_print_namespace(head);
1892 tomoyo_set_string(head, "aggregator ");
1893 tomoyo_set_string(head,
1894 ptr->original_name->name);
1895 tomoyo_set_space(head);
1896 tomoyo_set_string(head,
1897 ptr->aggregated_name->name);
1903 tomoyo_set_lf(head);
1910 * tomoyo_read_exception - Read exception policy.
1912 * @head: Pointer to "struct tomoyo_io_buffer".
1914 * Caller holds tomoyo_read_lock().
1916 static void tomoyo_read_exception(struct tomoyo_io_buffer *head)
1918 struct tomoyo_policy_namespace *ns =
1919 container_of(head->r.ns, typeof(*ns), namespace_list);
1923 while (head->r.step < TOMOYO_MAX_POLICY &&
1924 tomoyo_read_policy(head, head->r.step))
1926 if (head->r.step < TOMOYO_MAX_POLICY)
1928 while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP &&
1929 tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY))
1931 if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP)
1933 while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP
1934 + TOMOYO_MAX_ACL_GROUPS) {
1935 head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY
1937 if (!tomoyo_read_domain2(head, &ns->acl_group
1938 [head->r.acl_group_index]))
1945 /* Wait queue for kernel -> userspace notification. */
1946 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait);
1947 /* Wait queue for userspace -> kernel notification. */
1948 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait);
1950 /* Structure for query. */
1951 struct tomoyo_query {
1952 struct list_head list;
1953 struct tomoyo_domain_info *domain;
1956 unsigned int serial;
1962 /* The list for "struct tomoyo_query". */
1963 static LIST_HEAD(tomoyo_query_list);
1965 /* Lock for manipulating tomoyo_query_list. */
1966 static DEFINE_SPINLOCK(tomoyo_query_list_lock);
1969 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1972 static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
1975 * tomoyo_truncate - Truncate a line.
1977 * @str: String to truncate.
1979 * Returns length of truncated @str.
1981 static int tomoyo_truncate(char *str)
1985 while (*(unsigned char *) str > (unsigned char) ' ')
1988 return strlen(start) + 1;
1992 * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
1994 * @domain: Pointer to "struct tomoyo_domain_info".
1995 * @header: Lines containing ACL.
1999 static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header)
2002 char *realpath = NULL;
2004 char *symlink = NULL;
2005 char *cp = strchr(header, '\n');
2010 cp = strchr(cp + 1, '\n');
2014 len = strlen(cp) + 1;
2015 /* strstr() will return NULL if ordering is wrong. */
2017 argv0 = strstr(header, " argv[]={ \"");
2020 len += tomoyo_truncate(argv0) + 14;
2022 realpath = strstr(header, " exec={ realpath=\"");
2025 len += tomoyo_truncate(realpath) + 6;
2027 symlink = strstr(header, " symlink.target=\"");
2029 len += tomoyo_truncate(symlink + 1) + 1;
2031 buffer = kmalloc(len, GFP_NOFS);
2034 snprintf(buffer, len - 1, "%s", cp);
2036 tomoyo_addprintf(buffer, len, " exec.%s", realpath);
2038 tomoyo_addprintf(buffer, len, " exec.argv[0]=%s", argv0);
2040 tomoyo_addprintf(buffer, len, "%s", symlink);
2041 tomoyo_normalize_line(buffer);
2042 if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer,
2044 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
2049 * tomoyo_supervisor - Ask for the supervisor's decision.
2051 * @r: Pointer to "struct tomoyo_request_info".
2052 * @fmt: The printf()'s format string, followed by parameters.
2054 * Returns 0 if the supervisor decided to permit the access request which
2055 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
2056 * supervisor decided to retry the access request which violated the policy in
2057 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
2059 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
2064 static unsigned int tomoyo_serial;
2065 struct tomoyo_query entry = { };
2066 bool quota_exceeded = false;
2068 va_start(args, fmt);
2069 len = vsnprintf((char *) &len, 1, fmt, args) + 1;
2071 /* Write /sys/kernel/security/tomoyo/audit. */
2072 va_start(args, fmt);
2073 tomoyo_write_log2(r, len, fmt, args);
2075 /* Nothing more to do if granted. */
2079 tomoyo_update_stat(r->mode);
2081 case TOMOYO_CONFIG_ENFORCING:
2083 if (atomic_read(&tomoyo_query_observers))
2086 case TOMOYO_CONFIG_LEARNING:
2088 /* Check max_learning_entry parameter. */
2089 if (tomoyo_domain_quota_is_ok(r))
2096 va_start(args, fmt);
2097 entry.query = tomoyo_init_log(r, len, fmt, args);
2101 entry.query_len = strlen(entry.query) + 1;
2103 tomoyo_add_entry(r->domain, entry.query);
2106 len = tomoyo_round2(entry.query_len);
2107 entry.domain = r->domain;
2108 spin_lock(&tomoyo_query_list_lock);
2109 if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] &&
2110 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len
2111 >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) {
2112 quota_exceeded = true;
2114 entry.serial = tomoyo_serial++;
2115 entry.retry = r->retry;
2116 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len;
2117 list_add_tail(&entry.list, &tomoyo_query_list);
2119 spin_unlock(&tomoyo_query_list_lock);
2122 /* Give 10 seconds for supervisor's opinion. */
2123 while (entry.timer < 10) {
2124 wake_up_all(&tomoyo_query_wait);
2125 if (wait_event_interruptible_timeout
2126 (tomoyo_answer_wait, entry.answer ||
2127 !atomic_read(&tomoyo_query_observers), HZ))
2131 spin_lock(&tomoyo_query_list_lock);
2132 list_del(&entry.list);
2133 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len;
2134 spin_unlock(&tomoyo_query_list_lock);
2135 switch (entry.answer) {
2136 case 3: /* Asked to retry by administrator. */
2137 error = TOMOYO_RETRY_REQUEST;
2141 /* Granted by administrator. */
2145 /* Timed out or rejected by administrator. */
2154 * tomoyo_find_domain_by_qid - Get domain by query id.
2156 * @serial: Query ID assigned by tomoyo_supervisor().
2158 * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
2160 static struct tomoyo_domain_info *tomoyo_find_domain_by_qid
2161 (unsigned int serial)
2163 struct tomoyo_query *ptr;
2164 struct tomoyo_domain_info *domain = NULL;
2166 spin_lock(&tomoyo_query_list_lock);
2167 list_for_each_entry(ptr, &tomoyo_query_list, list) {
2168 if (ptr->serial != serial)
2170 domain = ptr->domain;
2173 spin_unlock(&tomoyo_query_list_lock);
2178 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
2180 * @file: Pointer to "struct file".
2181 * @wait: Pointer to "poll_table".
2183 * Returns EPOLLIN | EPOLLRDNORM when ready to read, 0 otherwise.
2185 * Waits for access requests which violated policy in enforcing mode.
2187 static __poll_t tomoyo_poll_query(struct file *file, poll_table *wait)
2189 if (!list_empty(&tomoyo_query_list))
2190 return EPOLLIN | EPOLLRDNORM;
2191 poll_wait(file, &tomoyo_query_wait, wait);
2192 if (!list_empty(&tomoyo_query_list))
2193 return EPOLLIN | EPOLLRDNORM;
2198 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
2200 * @head: Pointer to "struct tomoyo_io_buffer".
2202 static void tomoyo_read_query(struct tomoyo_io_buffer *head)
2204 struct list_head *tmp;
2205 unsigned int pos = 0;
2211 kfree(head->read_buf);
2212 head->read_buf = NULL;
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);
2217 if (pos++ != head->r.query_index)
2219 len = ptr->query_len;
2222 spin_unlock(&tomoyo_query_list_lock);
2224 head->r.query_index = 0;
2227 buf = kzalloc(len + 32, GFP_NOFS);
2231 spin_lock(&tomoyo_query_list_lock);
2232 list_for_each(tmp, &tomoyo_query_list) {
2233 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2235 if (pos++ != head->r.query_index)
2238 * Some query can be skipped because tomoyo_query_list
2239 * can change, but I don't care.
2241 if (len == ptr->query_len)
2242 snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial,
2243 ptr->retry, ptr->query);
2246 spin_unlock(&tomoyo_query_list_lock);
2248 head->read_buf = buf;
2249 head->r.w[head->r.w_pos++] = buf;
2250 head->r.query_index++;
2257 * tomoyo_write_answer - Write the supervisor's decision.
2259 * @head: Pointer to "struct tomoyo_io_buffer".
2261 * Returns 0 on success, -EINVAL otherwise.
2263 static int tomoyo_write_answer(struct tomoyo_io_buffer *head)
2265 char *data = head->write_buf;
2266 struct list_head *tmp;
2267 unsigned int serial;
2268 unsigned int answer;
2270 spin_lock(&tomoyo_query_list_lock);
2271 list_for_each(tmp, &tomoyo_query_list) {
2272 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2276 spin_unlock(&tomoyo_query_list_lock);
2277 if (sscanf(data, "A%u=%u", &serial, &answer) != 2)
2279 spin_lock(&tomoyo_query_list_lock);
2280 list_for_each(tmp, &tomoyo_query_list) {
2281 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2283 if (ptr->serial != serial)
2285 ptr->answer = answer;
2286 /* Remove from tomoyo_query_list. */
2288 list_del_init(&ptr->list);
2291 spin_unlock(&tomoyo_query_list_lock);
2296 * tomoyo_read_version: Get version.
2298 * @head: Pointer to "struct tomoyo_io_buffer".
2300 * Returns version information.
2302 static void tomoyo_read_version(struct tomoyo_io_buffer *head)
2305 tomoyo_io_printf(head, "2.6.0");
2310 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2311 static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = {
2312 [TOMOYO_STAT_POLICY_UPDATES] = "update:",
2313 [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:",
2314 [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:",
2315 [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:",
2318 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2319 static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = {
2320 [TOMOYO_MEMORY_POLICY] = "policy:",
2321 [TOMOYO_MEMORY_AUDIT] = "audit log:",
2322 [TOMOYO_MEMORY_QUERY] = "query message:",
2325 /* Counter for number of updates. */
2326 static atomic_t tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT];
2327 /* Timestamp counter for last updated. */
2328 static time64_t tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT];
2331 * tomoyo_update_stat - Update statistic counters.
2333 * @index: Index for policy type.
2337 void tomoyo_update_stat(const u8 index)
2339 atomic_inc(&tomoyo_stat_updated[index]);
2340 tomoyo_stat_modified[index] = ktime_get_real_seconds();
2344 * tomoyo_read_stat - Read statistic data.
2346 * @head: Pointer to "struct tomoyo_io_buffer".
2350 static void tomoyo_read_stat(struct tomoyo_io_buffer *head)
2353 unsigned int total = 0;
2357 for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) {
2358 tomoyo_io_printf(head, "Policy %-30s %10u",
2359 tomoyo_policy_headers[i],
2360 atomic_read(&tomoyo_stat_updated[i]));
2361 if (tomoyo_stat_modified[i]) {
2362 struct tomoyo_time stamp;
2364 tomoyo_convert_time(tomoyo_stat_modified[i], &stamp);
2365 tomoyo_io_printf(head, " (Last: %04u/%02u/%02u %02u:%02u:%02u)",
2366 stamp.year, stamp.month, stamp.day,
2367 stamp.hour, stamp.min, stamp.sec);
2369 tomoyo_set_lf(head);
2371 for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) {
2372 unsigned int used = tomoyo_memory_used[i];
2375 tomoyo_io_printf(head, "Memory used by %-22s %10u",
2376 tomoyo_memory_headers[i], used);
2377 used = tomoyo_memory_quota[i];
2379 tomoyo_io_printf(head, " (Quota: %10u)", used);
2380 tomoyo_set_lf(head);
2382 tomoyo_io_printf(head, "Total memory used: %10u\n",
2388 * tomoyo_write_stat - Set memory quota.
2390 * @head: Pointer to "struct tomoyo_io_buffer".
2394 static int tomoyo_write_stat(struct tomoyo_io_buffer *head)
2396 char *data = head->write_buf;
2399 if (tomoyo_str_starts(&data, "Memory used by "))
2400 for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++)
2401 if (tomoyo_str_starts(&data, tomoyo_memory_headers[i]))
2402 sscanf(data, "%u", &tomoyo_memory_quota[i]);
2407 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
2409 * @type: Type of interface.
2410 * @file: Pointer to "struct file".
2412 * Returns 0 on success, negative value otherwise.
2414 int tomoyo_open_control(const u8 type, struct file *file)
2416 struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS);
2420 mutex_init(&head->io_sem);
2423 case TOMOYO_DOMAINPOLICY:
2424 /* /sys/kernel/security/tomoyo/domain_policy */
2425 head->write = tomoyo_write_domain;
2426 head->read = tomoyo_read_domain;
2428 case TOMOYO_EXCEPTIONPOLICY:
2429 /* /sys/kernel/security/tomoyo/exception_policy */
2430 head->write = tomoyo_write_exception;
2431 head->read = tomoyo_read_exception;
2434 /* /sys/kernel/security/tomoyo/audit */
2435 head->poll = tomoyo_poll_log;
2436 head->read = tomoyo_read_log;
2438 case TOMOYO_PROCESS_STATUS:
2439 /* /sys/kernel/security/tomoyo/.process_status */
2440 head->write = tomoyo_write_pid;
2441 head->read = tomoyo_read_pid;
2443 case TOMOYO_VERSION:
2444 /* /sys/kernel/security/tomoyo/version */
2445 head->read = tomoyo_read_version;
2446 head->readbuf_size = 128;
2449 /* /sys/kernel/security/tomoyo/stat */
2450 head->write = tomoyo_write_stat;
2451 head->read = tomoyo_read_stat;
2452 head->readbuf_size = 1024;
2454 case TOMOYO_PROFILE:
2455 /* /sys/kernel/security/tomoyo/profile */
2456 head->write = tomoyo_write_profile;
2457 head->read = tomoyo_read_profile;
2459 case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */
2460 head->poll = tomoyo_poll_query;
2461 head->write = tomoyo_write_answer;
2462 head->read = tomoyo_read_query;
2464 case TOMOYO_MANAGER:
2465 /* /sys/kernel/security/tomoyo/manager */
2466 head->write = tomoyo_write_manager;
2467 head->read = tomoyo_read_manager;
2470 if (!(file->f_mode & FMODE_READ)) {
2472 * No need to allocate read_buf since it is not opened
2477 } else if (!head->poll) {
2478 /* Don't allocate read_buf for poll() access. */
2479 if (!head->readbuf_size)
2480 head->readbuf_size = 4096 * 2;
2481 head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS);
2482 if (!head->read_buf) {
2487 if (!(file->f_mode & FMODE_WRITE)) {
2489 * No need to allocate write_buf since it is not opened
2493 } else if (head->write) {
2494 head->writebuf_size = 4096 * 2;
2495 head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS);
2496 if (!head->write_buf) {
2497 kfree(head->read_buf);
2503 * If the file is /sys/kernel/security/tomoyo/query , increment the
2505 * The obserber counter is used by tomoyo_supervisor() to see if
2506 * there is some process monitoring /sys/kernel/security/tomoyo/query.
2508 if (type == TOMOYO_QUERY)
2509 atomic_inc(&tomoyo_query_observers);
2510 file->private_data = head;
2511 tomoyo_notify_gc(head, true);
2516 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
2518 * @file: Pointer to "struct file".
2519 * @wait: Pointer to "poll_table". Maybe NULL.
2521 * Returns EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM if ready to read/write,
2522 * EPOLLOUT | EPOLLWRNORM otherwise.
2524 __poll_t tomoyo_poll_control(struct file *file, poll_table *wait)
2526 struct tomoyo_io_buffer *head = file->private_data;
2529 return head->poll(file, wait) | EPOLLOUT | EPOLLWRNORM;
2530 return EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM;
2534 * tomoyo_set_namespace_cursor - Set namespace to read.
2536 * @head: Pointer to "struct tomoyo_io_buffer".
2540 static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head)
2542 struct list_head *ns;
2544 if (head->type != TOMOYO_EXCEPTIONPOLICY &&
2545 head->type != TOMOYO_PROFILE)
2548 * If this is the first read, or reading previous namespace finished
2549 * and has more namespaces to read, update the namespace cursor.
2552 if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) {
2553 /* Clearing is OK because tomoyo_flush() returned true. */
2554 memset(&head->r, 0, sizeof(head->r));
2555 head->r.ns = ns ? ns->next : tomoyo_namespace_list.next;
2560 * tomoyo_has_more_namespace - Check for unread namespaces.
2562 * @head: Pointer to "struct tomoyo_io_buffer".
2564 * Returns true if we have more entries to print, false otherwise.
2566 static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head)
2568 return (head->type == TOMOYO_EXCEPTIONPOLICY ||
2569 head->type == TOMOYO_PROFILE) && head->r.eof &&
2570 head->r.ns->next != &tomoyo_namespace_list;
2574 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
2576 * @head: Pointer to "struct tomoyo_io_buffer".
2577 * @buffer: Pointer to buffer to write to.
2578 * @buffer_len: Size of @buffer.
2580 * Returns bytes read on success, negative value otherwise.
2582 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
2583 const int buffer_len)
2590 if (mutex_lock_interruptible(&head->io_sem))
2592 head->read_user_buf = buffer;
2593 head->read_user_buf_avail = buffer_len;
2594 idx = tomoyo_read_lock();
2595 if (tomoyo_flush(head))
2596 /* Call the policy handler. */
2598 tomoyo_set_namespace_cursor(head);
2600 } while (tomoyo_flush(head) &&
2601 tomoyo_has_more_namespace(head));
2602 tomoyo_read_unlock(idx);
2603 len = head->read_user_buf - buffer;
2604 mutex_unlock(&head->io_sem);
2609 * tomoyo_parse_policy - Parse a policy line.
2611 * @head: Pointer to "struct tomoyo_io_buffer".
2612 * @line: Line to parse.
2614 * Returns 0 on success, negative value otherwise.
2616 * Caller holds tomoyo_read_lock().
2618 static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line)
2620 /* Delete request? */
2621 head->w.is_delete = !strncmp(line, "delete ", 7);
2622 if (head->w.is_delete)
2623 memmove(line, line + 7, strlen(line + 7) + 1);
2624 /* Selecting namespace to update. */
2625 if (head->type == TOMOYO_EXCEPTIONPOLICY ||
2626 head->type == TOMOYO_PROFILE) {
2628 char *cp = strchr(line, ' ');
2632 head->w.ns = tomoyo_assign_namespace(line);
2633 memmove(line, cp, strlen(cp) + 1);
2637 head->w.ns = &tomoyo_kernel_namespace;
2638 /* Don't allow updating if namespace is invalid. */
2642 /* Do the update. */
2643 return head->write(head);
2647 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
2649 * @head: Pointer to "struct tomoyo_io_buffer".
2650 * @buffer: Pointer to buffer to read from.
2651 * @buffer_len: Size of @buffer.
2653 * Returns @buffer_len on success, negative value otherwise.
2655 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
2656 const char __user *buffer, const int buffer_len)
2658 int error = buffer_len;
2659 size_t avail_len = buffer_len;
2660 char *cp0 = head->write_buf;
2665 if (mutex_lock_interruptible(&head->io_sem))
2667 head->read_user_buf_avail = 0;
2668 idx = tomoyo_read_lock();
2669 /* Read a line and dispatch it to the policy handler. */
2670 while (avail_len > 0) {
2673 if (head->w.avail >= head->writebuf_size - 1) {
2674 const int len = head->writebuf_size * 2;
2675 char *cp = kzalloc(len, GFP_NOFS);
2681 memmove(cp, cp0, head->w.avail);
2683 head->write_buf = cp;
2685 head->writebuf_size = len;
2687 if (get_user(c, buffer)) {
2693 cp0[head->w.avail++] = c;
2696 cp0[head->w.avail - 1] = '\0';
2698 tomoyo_normalize_line(cp0);
2699 if (!strcmp(cp0, "reset")) {
2700 head->w.ns = &tomoyo_kernel_namespace;
2701 head->w.domain = NULL;
2702 memset(&head->r, 0, sizeof(head->r));
2705 /* Don't allow updating policies by non manager programs. */
2706 switch (head->type) {
2707 case TOMOYO_PROCESS_STATUS:
2708 /* This does not write anything. */
2710 case TOMOYO_DOMAINPOLICY:
2711 if (tomoyo_select_domain(head, cp0))
2714 case TOMOYO_EXCEPTIONPOLICY:
2715 if (!strcmp(cp0, "select transition_only")) {
2716 head->r.print_transition_related_only = true;
2721 if (!tomoyo_manager()) {
2726 switch (tomoyo_parse_policy(head, cp0)) {
2731 switch (head->type) {
2732 case TOMOYO_DOMAINPOLICY:
2733 case TOMOYO_EXCEPTIONPOLICY:
2735 case TOMOYO_PROFILE:
2736 case TOMOYO_MANAGER:
2737 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
2746 tomoyo_read_unlock(idx);
2747 mutex_unlock(&head->io_sem);
2752 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
2754 * @head: Pointer to "struct tomoyo_io_buffer".
2756 void tomoyo_close_control(struct tomoyo_io_buffer *head)
2759 * If the file is /sys/kernel/security/tomoyo/query , decrement the
2762 if (head->type == TOMOYO_QUERY &&
2763 atomic_dec_and_test(&tomoyo_query_observers))
2764 wake_up_all(&tomoyo_answer_wait);
2765 tomoyo_notify_gc(head, false);
2769 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
2771 void tomoyo_check_profile(void)
2773 struct tomoyo_domain_info *domain;
2774 const int idx = tomoyo_read_lock();
2776 tomoyo_policy_loaded = true;
2777 pr_info("TOMOYO: 2.6.0\n");
2778 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list,
2779 srcu_read_lock_held(&tomoyo_ss)) {
2780 const u8 profile = domain->profile;
2781 struct tomoyo_policy_namespace *ns = domain->ns;
2783 if (ns->profile_version == 20110903) {
2784 pr_info_once("Converting profile version from %u to %u.\n",
2785 20110903, 20150505);
2786 ns->profile_version = 20150505;
2788 if (ns->profile_version != 20150505)
2789 pr_err("Profile version %u is not supported.\n",
2790 ns->profile_version);
2791 else if (!ns->profile_ptr[profile])
2792 pr_err("Profile %u (used by '%s') is not defined.\n",
2793 profile, domain->domainname->name);
2796 pr_err("Userland tools for TOMOYO 2.6 must be installed and policy must be initialized.\n");
2797 pr_err("Please see https://tomoyo.osdn.jp/2.6/ for more information.\n");
2800 tomoyo_read_unlock(idx);
2801 pr_info("Mandatory Access Control activated.\n");
2805 * tomoyo_load_builtin_policy - Load built-in policy.
2809 void __init tomoyo_load_builtin_policy(void)
2811 #ifdef CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING
2812 static char tomoyo_builtin_profile[] __initdata =
2813 "PROFILE_VERSION=20150505\n"
2814 "0-CONFIG={ mode=learning grant_log=no reject_log=yes }\n";
2815 static char tomoyo_builtin_exception_policy[] __initdata =
2816 "aggregator proc:/self/exe /proc/self/exe\n";
2817 static char tomoyo_builtin_domain_policy[] __initdata = "";
2818 static char tomoyo_builtin_manager[] __initdata = "";
2819 static char tomoyo_builtin_stat[] __initdata = "";
2822 * This include file is manually created and contains built-in policy
2823 * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy",
2824 * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager",
2825 * "tomoyo_builtin_stat" in the form of "static char [] __initdata".
2827 #include "builtin-policy.h"
2830 const int idx = tomoyo_read_lock();
2832 for (i = 0; i < 5; i++) {
2833 struct tomoyo_io_buffer head = { };
2838 start = tomoyo_builtin_profile;
2839 head.type = TOMOYO_PROFILE;
2840 head.write = tomoyo_write_profile;
2843 start = tomoyo_builtin_exception_policy;
2844 head.type = TOMOYO_EXCEPTIONPOLICY;
2845 head.write = tomoyo_write_exception;
2848 start = tomoyo_builtin_domain_policy;
2849 head.type = TOMOYO_DOMAINPOLICY;
2850 head.write = tomoyo_write_domain;
2853 start = tomoyo_builtin_manager;
2854 head.type = TOMOYO_MANAGER;
2855 head.write = tomoyo_write_manager;
2858 start = tomoyo_builtin_stat;
2859 head.type = TOMOYO_STAT;
2860 head.write = tomoyo_write_stat;
2864 char *end = strchr(start, '\n');
2869 tomoyo_normalize_line(start);
2870 head.write_buf = start;
2871 tomoyo_parse_policy(&head, start);
2875 tomoyo_read_unlock(idx);
2876 #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
2877 tomoyo_check_profile();