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usb: dwc3: core: add defines for XferNotReady event on Control EPs
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / security / tomoyo / common.c
blob2e43aec1c36b04b6335b83d9942ada9d499c5ff8
1 /*
2 * security/tomoyo/common.c
3 *
4 * Copyright (C) 2005-2011 NTT DATA CORPORATION
5 */
6
7 #include <linux/uaccess.h>
8 #include <linux/slab.h>
9 #include <linux/security.h>
10 #include "common.h"
11
12 /* String table for operation mode. */
13 const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = {
14 [TOMOYO_CONFIG_DISABLED] = "disabled",
15 [TOMOYO_CONFIG_LEARNING] = "learning",
16 [TOMOYO_CONFIG_PERMISSIVE] = "permissive",
17 [TOMOYO_CONFIG_ENFORCING] = "enforcing"
18 };
19
20 /* String table for /sys/kernel/security/tomoyo/profile */
21 const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
22 + TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
23 [TOMOYO_MAC_FILE_EXECUTE] = "execute",
24 [TOMOYO_MAC_FILE_OPEN] = "open",
25 [TOMOYO_MAC_FILE_CREATE] = "create",
26 [TOMOYO_MAC_FILE_UNLINK] = "unlink",
27 [TOMOYO_MAC_FILE_GETATTR] = "getattr",
28 [TOMOYO_MAC_FILE_MKDIR] = "mkdir",
29 [TOMOYO_MAC_FILE_RMDIR] = "rmdir",
30 [TOMOYO_MAC_FILE_MKFIFO] = "mkfifo",
31 [TOMOYO_MAC_FILE_MKSOCK] = "mksock",
32 [TOMOYO_MAC_FILE_TRUNCATE] = "truncate",
33 [TOMOYO_MAC_FILE_SYMLINK] = "symlink",
34 [TOMOYO_MAC_FILE_MKBLOCK] = "mkblock",
35 [TOMOYO_MAC_FILE_MKCHAR] = "mkchar",
36 [TOMOYO_MAC_FILE_LINK] = "link",
37 [TOMOYO_MAC_FILE_RENAME] = "rename",
38 [TOMOYO_MAC_FILE_CHMOD] = "chmod",
39 [TOMOYO_MAC_FILE_CHOWN] = "chown",
40 [TOMOYO_MAC_FILE_CHGRP] = "chgrp",
41 [TOMOYO_MAC_FILE_IOCTL] = "ioctl",
42 [TOMOYO_MAC_FILE_CHROOT] = "chroot",
43 [TOMOYO_MAC_FILE_MOUNT] = "mount",
44 [TOMOYO_MAC_FILE_UMOUNT] = "unmount",
45 [TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root",
46 [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file",
47 };
48
49 /* String table for conditions. */
50 const char * const tomoyo_condition_keyword[TOMOYO_MAX_CONDITION_KEYWORD] = {
51 [TOMOYO_TASK_UID] = "task.uid",
52 [TOMOYO_TASK_EUID] = "task.euid",
53 [TOMOYO_TASK_SUID] = "task.suid",
54 [TOMOYO_TASK_FSUID] = "task.fsuid",
55 [TOMOYO_TASK_GID] = "task.gid",
56 [TOMOYO_TASK_EGID] = "task.egid",
57 [TOMOYO_TASK_SGID] = "task.sgid",
58 [TOMOYO_TASK_FSGID] = "task.fsgid",
59 [TOMOYO_TASK_PID] = "task.pid",
60 [TOMOYO_TASK_PPID] = "task.ppid",
61 [TOMOYO_EXEC_ARGC] = "exec.argc",
62 [TOMOYO_EXEC_ENVC] = "exec.envc",
63 [TOMOYO_TYPE_IS_SOCKET] = "socket",
64 [TOMOYO_TYPE_IS_SYMLINK] = "symlink",
65 [TOMOYO_TYPE_IS_FILE] = "file",
66 [TOMOYO_TYPE_IS_BLOCK_DEV] = "block",
67 [TOMOYO_TYPE_IS_DIRECTORY] = "directory",
68 [TOMOYO_TYPE_IS_CHAR_DEV] = "char",
69 [TOMOYO_TYPE_IS_FIFO] = "fifo",
70 [TOMOYO_MODE_SETUID] = "setuid",
71 [TOMOYO_MODE_SETGID] = "setgid",
72 [TOMOYO_MODE_STICKY] = "sticky",
73 [TOMOYO_MODE_OWNER_READ] = "owner_read",
74 [TOMOYO_MODE_OWNER_WRITE] = "owner_write",
75 [TOMOYO_MODE_OWNER_EXECUTE] = "owner_execute",
76 [TOMOYO_MODE_GROUP_READ] = "group_read",
77 [TOMOYO_MODE_GROUP_WRITE] = "group_write",
78 [TOMOYO_MODE_GROUP_EXECUTE] = "group_execute",
79 [TOMOYO_MODE_OTHERS_READ] = "others_read",
80 [TOMOYO_MODE_OTHERS_WRITE] = "others_write",
81 [TOMOYO_MODE_OTHERS_EXECUTE] = "others_execute",
82 [TOMOYO_EXEC_REALPATH] = "exec.realpath",
83 [TOMOYO_SYMLINK_TARGET] = "symlink.target",
84 [TOMOYO_PATH1_UID] = "path1.uid",
85 [TOMOYO_PATH1_GID] = "path1.gid",
86 [TOMOYO_PATH1_INO] = "path1.ino",
87 [TOMOYO_PATH1_MAJOR] = "path1.major",
88 [TOMOYO_PATH1_MINOR] = "path1.minor",
89 [TOMOYO_PATH1_PERM] = "path1.perm",
90 [TOMOYO_PATH1_TYPE] = "path1.type",
91 [TOMOYO_PATH1_DEV_MAJOR] = "path1.dev_major",
92 [TOMOYO_PATH1_DEV_MINOR] = "path1.dev_minor",
93 [TOMOYO_PATH2_UID] = "path2.uid",
94 [TOMOYO_PATH2_GID] = "path2.gid",
95 [TOMOYO_PATH2_INO] = "path2.ino",
96 [TOMOYO_PATH2_MAJOR] = "path2.major",
97 [TOMOYO_PATH2_MINOR] = "path2.minor",
98 [TOMOYO_PATH2_PERM] = "path2.perm",
99 [TOMOYO_PATH2_TYPE] = "path2.type",
100 [TOMOYO_PATH2_DEV_MAJOR] = "path2.dev_major",
101 [TOMOYO_PATH2_DEV_MINOR] = "path2.dev_minor",
102 [TOMOYO_PATH1_PARENT_UID] = "path1.parent.uid",
103 [TOMOYO_PATH1_PARENT_GID] = "path1.parent.gid",
104 [TOMOYO_PATH1_PARENT_INO] = "path1.parent.ino",
105 [TOMOYO_PATH1_PARENT_PERM] = "path1.parent.perm",
106 [TOMOYO_PATH2_PARENT_UID] = "path2.parent.uid",
107 [TOMOYO_PATH2_PARENT_GID] = "path2.parent.gid",
108 [TOMOYO_PATH2_PARENT_INO] = "path2.parent.ino",
109 [TOMOYO_PATH2_PARENT_PERM] = "path2.parent.perm",
110 };
111
112 /* String table for PREFERENCE keyword. */
113 static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = {
114 [TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log",
115 [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry",
116 };
117
118 /* String table for path operation. */
119 const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
120 [TOMOYO_TYPE_EXECUTE] = "execute",
121 [TOMOYO_TYPE_READ] = "read",
122 [TOMOYO_TYPE_WRITE] = "write",
123 [TOMOYO_TYPE_APPEND] = "append",
124 [TOMOYO_TYPE_UNLINK] = "unlink",
125 [TOMOYO_TYPE_GETATTR] = "getattr",
126 [TOMOYO_TYPE_RMDIR] = "rmdir",
127 [TOMOYO_TYPE_TRUNCATE] = "truncate",
128 [TOMOYO_TYPE_SYMLINK] = "symlink",
129 [TOMOYO_TYPE_CHROOT] = "chroot",
130 [TOMOYO_TYPE_UMOUNT] = "unmount",
131 };
132
133 /* String table for categories. */
134 static const char * const tomoyo_category_keywords
135 [TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
136 [TOMOYO_MAC_CATEGORY_FILE] = "file",
137 };
138
139 /* Permit policy management by non-root user? */
140 static bool tomoyo_manage_by_non_root;
141
142 /* Utility functions. */
143
144 /**
145 * tomoyo_yesno - Return "yes" or "no".
146 *
147 * @value: Bool value.
148 */
149 const char *tomoyo_yesno(const unsigned int value)
150 {
151 return value ? "yes" : "no";
152 }
153
154 /**
155 * tomoyo_addprintf - strncat()-like-snprintf().
156 *
157 * @buffer: Buffer to write to. Must be '\0'-terminated.
158 * @len: Size of @buffer.
159 * @fmt: The printf()'s format string, followed by parameters.
160 *
161 * Returns nothing.
162 */
163 static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...)
164 {
165 va_list args;
166 const int pos = strlen(buffer);
167 va_start(args, fmt);
168 vsnprintf(buffer + pos, len - pos - 1, fmt, args);
169 va_end(args);
170 }
171
172 /**
173 * tomoyo_flush - Flush queued string to userspace's buffer.
174 *
175 * @head: Pointer to "struct tomoyo_io_buffer".
176 *
177 * Returns true if all data was flushed, false otherwise.
178 */
179 static bool tomoyo_flush(struct tomoyo_io_buffer *head)
180 {
181 while (head->r.w_pos) {
182 const char *w = head->r.w[0];
183 size_t len = strlen(w);
184 if (len) {
185 if (len > head->read_user_buf_avail)
186 len = head->read_user_buf_avail;
187 if (!len)
188 return false;
189 if (copy_to_user(head->read_user_buf, w, len))
190 return false;
191 head->read_user_buf_avail -= len;
192 head->read_user_buf += len;
193 w += len;
194 }
195 head->r.w[0] = w;
196 if (*w)
197 return false;
198 /* Add '\0' for audit logs and query. */
199 if (head->poll) {
200 if (!head->read_user_buf_avail ||
201 copy_to_user(head->read_user_buf, "", 1))
202 return false;
203 head->read_user_buf_avail--;
204 head->read_user_buf++;
205 }
206 head->r.w_pos--;
207 for (len = 0; len < head->r.w_pos; len++)
208 head->r.w[len] = head->r.w[len + 1];
209 }
210 head->r.avail = 0;
211 return true;
212 }
213
214 /**
215 * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure.
216 *
217 * @head: Pointer to "struct tomoyo_io_buffer".
218 * @string: String to print.
219 *
220 * Note that @string has to be kept valid until @head is kfree()d.
221 * This means that char[] allocated on stack memory cannot be passed to
222 * this function. Use tomoyo_io_printf() for char[] allocated on stack memory.
223 */
224 static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string)
225 {
226 if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) {
227 head->r.w[head->r.w_pos++] = string;
228 tomoyo_flush(head);
229 } else
230 WARN_ON(1);
231 }
232
233 /**
234 * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure.
235 *
236 * @head: Pointer to "struct tomoyo_io_buffer".
237 * @fmt: The printf()'s format string, followed by parameters.
238 */
239 void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
240 {
241 va_list args;
242 size_t len;
243 size_t pos = head->r.avail;
244 int size = head->readbuf_size - pos;
245 if (size <= 0)
246 return;
247 va_start(args, fmt);
248 len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1;
249 va_end(args);
250 if (pos + len >= head->readbuf_size) {
251 WARN_ON(1);
252 return;
253 }
254 head->r.avail += len;
255 tomoyo_set_string(head, head->read_buf + pos);
256 }
257
258 /**
259 * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure.
260 *
261 * @head: Pointer to "struct tomoyo_io_buffer".
262 *
263 * Returns nothing.
264 */
265 static void tomoyo_set_space(struct tomoyo_io_buffer *head)
266 {
267 tomoyo_set_string(head, " ");
268 }
269
270 /**
271 * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure.
272 *
273 * @head: Pointer to "struct tomoyo_io_buffer".
274 *
275 * Returns nothing.
276 */
277 static bool tomoyo_set_lf(struct tomoyo_io_buffer *head)
278 {
279 tomoyo_set_string(head, "\n");
280 return !head->r.w_pos;
281 }
282
283 /**
284 * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure.
285 *
286 * @head: Pointer to "struct tomoyo_io_buffer".
287 *
288 * Returns nothing.
289 */
290 static void tomoyo_set_slash(struct tomoyo_io_buffer *head)
291 {
292 tomoyo_set_string(head, "/");
293 }
294
295 /* List of namespaces. */
296 LIST_HEAD(tomoyo_namespace_list);
297 /* True if namespace other than tomoyo_kernel_namespace is defined. */
298 static bool tomoyo_namespace_enabled;
299
300 /**
301 * tomoyo_init_policy_namespace - Initialize namespace.
302 *
303 * @ns: Pointer to "struct tomoyo_policy_namespace".
304 *
305 * Returns nothing.
306 */
307 void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns)
308 {
309 unsigned int idx;
310 for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++)
311 INIT_LIST_HEAD(&ns->acl_group[idx]);
312 for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++)
313 INIT_LIST_HEAD(&ns->group_list[idx]);
314 for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++)
315 INIT_LIST_HEAD(&ns->policy_list[idx]);
316 ns->profile_version = 20100903;
317 tomoyo_namespace_enabled = !list_empty(&tomoyo_namespace_list);
318 list_add_tail_rcu(&ns->namespace_list, &tomoyo_namespace_list);
319 }
320
321 /**
322 * tomoyo_print_namespace - Print namespace header.
323 *
324 * @head: Pointer to "struct tomoyo_io_buffer".
325 *
326 * Returns nothing.
327 */
328 static void tomoyo_print_namespace(struct tomoyo_io_buffer *head)
329 {
330 if (!tomoyo_namespace_enabled)
331 return;
332 tomoyo_set_string(head,
333 container_of(head->r.ns,
334 struct tomoyo_policy_namespace,
335 namespace_list)->name);
336 tomoyo_set_space(head);
337 }
338
339 /**
340 * tomoyo_print_name_union - Print a tomoyo_name_union.
341 *
342 * @head: Pointer to "struct tomoyo_io_buffer".
343 * @ptr: Pointer to "struct tomoyo_name_union".
344 */
345 static void tomoyo_print_name_union(struct tomoyo_io_buffer *head,
346 const struct tomoyo_name_union *ptr)
347 {
348 tomoyo_set_space(head);
349 if (ptr->group) {
350 tomoyo_set_string(head, "@");
351 tomoyo_set_string(head, ptr->group->group_name->name);
352 } else {
353 tomoyo_set_string(head, ptr->filename->name);
354 }
355 }
356
357 /**
358 * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote.
359 *
360 * @head: Pointer to "struct tomoyo_io_buffer".
361 * @ptr: Pointer to "struct tomoyo_name_union".
362 *
363 * Returns nothing.
364 */
365 static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer *head,
366 const struct tomoyo_name_union *ptr)
367 {
368 if (ptr->group) {
369 tomoyo_set_string(head, "@");
370 tomoyo_set_string(head, ptr->group->group_name->name);
371 } else {
372 tomoyo_set_string(head, "\"");
373 tomoyo_set_string(head, ptr->filename->name);
374 tomoyo_set_string(head, "\"");
375 }
376 }
377
378 /**
379 * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space.
380 *
381 * @head: Pointer to "struct tomoyo_io_buffer".
382 * @ptr: Pointer to "struct tomoyo_number_union".
383 *
384 * Returns nothing.
385 */
386 static void tomoyo_print_number_union_nospace
387 (struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr)
388 {
389 if (ptr->group) {
390 tomoyo_set_string(head, "@");
391 tomoyo_set_string(head, ptr->group->group_name->name);
392 } else {
393 int i;
394 unsigned long min = ptr->values[0];
395 const unsigned long max = ptr->values[1];
396 u8 min_type = ptr->value_type[0];
397 const u8 max_type = ptr->value_type[1];
398 char buffer[128];
399 buffer[0] = '\0';
400 for (i = 0; i < 2; i++) {
401 switch (min_type) {
402 case TOMOYO_VALUE_TYPE_HEXADECIMAL:
403 tomoyo_addprintf(buffer, sizeof(buffer),
404 "0x%lX", min);
405 break;
406 case TOMOYO_VALUE_TYPE_OCTAL:
407 tomoyo_addprintf(buffer, sizeof(buffer),
408 "0%lo", min);
409 break;
410 default:
411 tomoyo_addprintf(buffer, sizeof(buffer), "%lu",
412 min);
413 break;
414 }
415 if (min == max && min_type == max_type)
416 break;
417 tomoyo_addprintf(buffer, sizeof(buffer), "-");
418 min_type = max_type;
419 min = max;
420 }
421 tomoyo_io_printf(head, "%s", buffer);
422 }
423 }
424
425 /**
426 * tomoyo_print_number_union - Print a tomoyo_number_union.
427 *
428 * @head: Pointer to "struct tomoyo_io_buffer".
429 * @ptr: Pointer to "struct tomoyo_number_union".
430 *
431 * Returns nothing.
432 */
433 static void tomoyo_print_number_union(struct tomoyo_io_buffer *head,
434 const struct tomoyo_number_union *ptr)
435 {
436 tomoyo_set_space(head);
437 tomoyo_print_number_union_nospace(head, ptr);
438 }
439
440 /**
441 * tomoyo_assign_profile - Create a new profile.
442 *
443 * @ns: Pointer to "struct tomoyo_policy_namespace".
444 * @profile: Profile number to create.
445 *
446 * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
447 */
448 static struct tomoyo_profile *tomoyo_assign_profile
449 (struct tomoyo_policy_namespace *ns, const unsigned int profile)
450 {
451 struct tomoyo_profile *ptr;
452 struct tomoyo_profile *entry;
453 if (profile >= TOMOYO_MAX_PROFILES)
454 return NULL;
455 ptr = ns->profile_ptr[profile];
456 if (ptr)
457 return ptr;
458 entry = kzalloc(sizeof(*entry), GFP_NOFS);
459 if (mutex_lock_interruptible(&tomoyo_policy_lock))
460 goto out;
461 ptr = ns->profile_ptr[profile];
462 if (!ptr && tomoyo_memory_ok(entry)) {
463 ptr = entry;
464 ptr->default_config = TOMOYO_CONFIG_DISABLED |
465 TOMOYO_CONFIG_WANT_GRANT_LOG |
466 TOMOYO_CONFIG_WANT_REJECT_LOG;
467 memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT,
468 sizeof(ptr->config));
469 ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] = 1024;
470 ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] = 2048;
471 mb(); /* Avoid out-of-order execution. */
472 ns->profile_ptr[profile] = ptr;
473 entry = NULL;
474 }
475 mutex_unlock(&tomoyo_policy_lock);
476 out:
477 kfree(entry);
478 return ptr;
479 }
480
481 /**
482 * tomoyo_profile - Find a profile.
483 *
484 * @ns: Pointer to "struct tomoyo_policy_namespace".
485 * @profile: Profile number to find.
486 *
487 * Returns pointer to "struct tomoyo_profile".
488 */
489 struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
490 const u8 profile)
491 {
492 static struct tomoyo_profile tomoyo_null_profile;
493 struct tomoyo_profile *ptr = ns->profile_ptr[profile];
494 if (!ptr)
495 ptr = &tomoyo_null_profile;
496 return ptr;
497 }
498
499 /**
500 * tomoyo_find_yesno - Find values for specified keyword.
501 *
502 * @string: String to check.
503 * @find: Name of keyword.
504 *
505 * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
506 */
507 static s8 tomoyo_find_yesno(const char *string, const char *find)
508 {
509 const char *cp = strstr(string, find);
510 if (cp) {
511 cp += strlen(find);
512 if (!strncmp(cp, "=yes", 4))
513 return 1;
514 else if (!strncmp(cp, "=no", 3))
515 return 0;
516 }
517 return -1;
518 }
519
520 /**
521 * tomoyo_set_uint - Set value for specified preference.
522 *
523 * @i: Pointer to "unsigned int".
524 * @string: String to check.
525 * @find: Name of keyword.
526 *
527 * Returns nothing.
528 */
529 static void tomoyo_set_uint(unsigned int *i, const char *string,
530 const char *find)
531 {
532 const char *cp = strstr(string, find);
533 if (cp)
534 sscanf(cp + strlen(find), "=%u", i);
535 }
536
537 /**
538 * tomoyo_set_mode - Set mode for specified profile.
539 *
540 * @name: Name of functionality.
541 * @value: Mode for @name.
542 * @profile: Pointer to "struct tomoyo_profile".
543 *
544 * Returns 0 on success, negative value otherwise.
545 */
546 static int tomoyo_set_mode(char *name, const char *value,
547 struct tomoyo_profile *profile)
548 {
549 u8 i;
550 u8 config;
551 if (!strcmp(name, "CONFIG")) {
552 i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX;
553 config = profile->default_config;
554 } else if (tomoyo_str_starts(&name, "CONFIG::")) {
555 config = 0;
556 for (i = 0; i < TOMOYO_MAX_MAC_INDEX
557 + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) {
558 int len = 0;
559 if (i < TOMOYO_MAX_MAC_INDEX) {
560 const u8 c = tomoyo_index2category[i];
561 const char *category =
562 tomoyo_category_keywords[c];
563 len = strlen(category);
564 if (strncmp(name, category, len) ||
565 name[len++] != ':' || name[len++] != ':')
566 continue;
567 }
568 if (strcmp(name + len, tomoyo_mac_keywords[i]))
569 continue;
570 config = profile->config[i];
571 break;
572 }
573 if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
574 return -EINVAL;
575 } else {
576 return -EINVAL;
577 }
578 if (strstr(value, "use_default")) {
579 config = TOMOYO_CONFIG_USE_DEFAULT;
580 } else {
581 u8 mode;
582 for (mode = 0; mode < 4; mode++)
583 if (strstr(value, tomoyo_mode[mode]))
584 /*
585 * Update lower 3 bits in order to distinguish
586 * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
587 */
588 config = (config & ~7) | mode;
589 if (config != TOMOYO_CONFIG_USE_DEFAULT) {
590 switch (tomoyo_find_yesno(value, "grant_log")) {
591 case 1:
592 config |= TOMOYO_CONFIG_WANT_GRANT_LOG;
593 break;
594 case 0:
595 config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG;
596 break;
597 }
598 switch (tomoyo_find_yesno(value, "reject_log")) {
599 case 1:
600 config |= TOMOYO_CONFIG_WANT_REJECT_LOG;
601 break;
602 case 0:
603 config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG;
604 break;
605 }
606 }
607 }
608 if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
609 profile->config[i] = config;
610 else if (config != TOMOYO_CONFIG_USE_DEFAULT)
611 profile->default_config = config;
612 return 0;
613 }
614
615 /**
616 * tomoyo_write_profile - Write profile table.
617 *
618 * @head: Pointer to "struct tomoyo_io_buffer".
619 *
620 * Returns 0 on success, negative value otherwise.
621 */
622 static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
623 {
624 char *data = head->write_buf;
625 unsigned int i;
626 char *cp;
627 struct tomoyo_profile *profile;
628 if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version)
629 == 1)
630 return 0;
631 i = simple_strtoul(data, &cp, 10);
632 if (*cp != '-')
633 return -EINVAL;
634 data = cp + 1;
635 profile = tomoyo_assign_profile(head->w.ns, i);
636 if (!profile)
637 return -EINVAL;
638 cp = strchr(data, '=');
639 if (!cp)
640 return -EINVAL;
641 *cp++ = '\0';
642 if (!strcmp(data, "COMMENT")) {
643 static DEFINE_SPINLOCK(lock);
644 const struct tomoyo_path_info *new_comment
645 = tomoyo_get_name(cp);
646 const struct tomoyo_path_info *old_comment;
647 if (!new_comment)
648 return -ENOMEM;
649 spin_lock(&lock);
650 old_comment = profile->comment;
651 profile->comment = new_comment;
652 spin_unlock(&lock);
653 tomoyo_put_name(old_comment);
654 return 0;
655 }
656 if (!strcmp(data, "PREFERENCE")) {
657 for (i = 0; i < TOMOYO_MAX_PREF; i++)
658 tomoyo_set_uint(&profile->pref[i], cp,
659 tomoyo_pref_keywords[i]);
660 return 0;
661 }
662 return tomoyo_set_mode(data, cp, profile);
663 }
664
665 /**
666 * tomoyo_print_config - Print mode for specified functionality.
667 *
668 * @head: Pointer to "struct tomoyo_io_buffer".
669 * @config: Mode for that functionality.
670 *
671 * Returns nothing.
672 *
673 * Caller prints functionality's name.
674 */
675 static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config)
676 {
677 tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n",
678 tomoyo_mode[config & 3],
679 tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG),
680 tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG));
681 }
682
683 /**
684 * tomoyo_read_profile - Read profile table.
685 *
686 * @head: Pointer to "struct tomoyo_io_buffer".
687 *
688 * Returns nothing.
689 */
690 static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
691 {
692 u8 index;
693 struct tomoyo_policy_namespace *ns =
694 container_of(head->r.ns, typeof(*ns), namespace_list);
695 const struct tomoyo_profile *profile;
696 if (head->r.eof)
697 return;
698 next:
699 index = head->r.index;
700 profile = ns->profile_ptr[index];
701 switch (head->r.step) {
702 case 0:
703 tomoyo_print_namespace(head);
704 tomoyo_io_printf(head, "PROFILE_VERSION=%u\n",
705 ns->profile_version);
706 head->r.step++;
707 break;
708 case 1:
709 for ( ; head->r.index < TOMOYO_MAX_PROFILES;
710 head->r.index++)
711 if (ns->profile_ptr[head->r.index])
712 break;
713 if (head->r.index == TOMOYO_MAX_PROFILES) {
714 head->r.eof = true;
715 return;
716 }
717 head->r.step++;
718 break;
719 case 2:
720 {
721 u8 i;
722 const struct tomoyo_path_info *comment =
723 profile->comment;
724 tomoyo_print_namespace(head);
725 tomoyo_io_printf(head, "%u-COMMENT=", index);
726 tomoyo_set_string(head, comment ? comment->name : "");
727 tomoyo_set_lf(head);
728 tomoyo_print_namespace(head);
729 tomoyo_io_printf(head, "%u-PREFERENCE={ ", index);
730 for (i = 0; i < TOMOYO_MAX_PREF; i++)
731 tomoyo_io_printf(head, "%s=%u ",
732 tomoyo_pref_keywords[i],
733 profile->pref[i]);
734 tomoyo_set_string(head, "}\n");
735 head->r.step++;
736 }
737 break;
738 case 3:
739 {
740 tomoyo_print_namespace(head);
741 tomoyo_io_printf(head, "%u-%s", index, "CONFIG");
742 tomoyo_print_config(head, profile->default_config);
743 head->r.bit = 0;
744 head->r.step++;
745 }
746 break;
747 case 4:
748 for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX
749 + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) {
750 const u8 i = head->r.bit;
751 const u8 config = profile->config[i];
752 if (config == TOMOYO_CONFIG_USE_DEFAULT)
753 continue;
754 tomoyo_print_namespace(head);
755 if (i < TOMOYO_MAX_MAC_INDEX)
756 tomoyo_io_printf(head, "%u-CONFIG::%s::%s",
757 index,
758 tomoyo_category_keywords
759 [tomoyo_index2category[i]],
760 tomoyo_mac_keywords[i]);
761 else
762 tomoyo_io_printf(head, "%u-CONFIG::%s", index,
763 tomoyo_mac_keywords[i]);
764 tomoyo_print_config(head, config);
765 head->r.bit++;
766 break;
767 }
768 if (head->r.bit == TOMOYO_MAX_MAC_INDEX
769 + TOMOYO_MAX_MAC_CATEGORY_INDEX) {
770 head->r.index++;
771 head->r.step = 1;
772 }
773 break;
774 }
775 if (tomoyo_flush(head))
776 goto next;
777 }
778
779 /**
780 * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry.
781 *
782 * @a: Pointer to "struct tomoyo_acl_head".
783 * @b: Pointer to "struct tomoyo_acl_head".
784 *
785 * Returns true if @a == @b, false otherwise.
786 */
787 static bool tomoyo_same_manager(const struct tomoyo_acl_head *a,
788 const struct tomoyo_acl_head *b)
789 {
790 return container_of(a, struct tomoyo_manager, head)->manager ==
791 container_of(b, struct tomoyo_manager, head)->manager;
792 }
793
794 /**
795 * tomoyo_update_manager_entry - Add a manager entry.
796 *
797 * @manager: The path to manager or the domainnamme.
798 * @is_delete: True if it is a delete request.
799 *
800 * Returns 0 on success, negative value otherwise.
801 *
802 * Caller holds tomoyo_read_lock().
803 */
804 static int tomoyo_update_manager_entry(const char *manager,
805 const bool is_delete)
806 {
807 struct tomoyo_manager e = { };
808 struct tomoyo_acl_param param = {
809 /* .ns = &tomoyo_kernel_namespace, */
810 .is_delete = is_delete,
811 .list = &tomoyo_kernel_namespace.
812 policy_list[TOMOYO_ID_MANAGER],
813 };
814 int error = is_delete ? -ENOENT : -ENOMEM;
815 if (tomoyo_domain_def(manager)) {
816 if (!tomoyo_correct_domain(manager))
817 return -EINVAL;
818 e.is_domain = true;
819 } else {
820 if (!tomoyo_correct_path(manager))
821 return -EINVAL;
822 }
823 e.manager = tomoyo_get_name(manager);
824 if (e.manager) {
825 error = tomoyo_update_policy(&e.head, sizeof(e), &param,
826 tomoyo_same_manager);
827 tomoyo_put_name(e.manager);
828 }
829 return error;
830 }
831
832 /**
833 * tomoyo_write_manager - Write manager policy.
834 *
835 * @head: Pointer to "struct tomoyo_io_buffer".
836 *
837 * Returns 0 on success, negative value otherwise.
838 *
839 * Caller holds tomoyo_read_lock().
840 */
841 static int tomoyo_write_manager(struct tomoyo_io_buffer *head)
842 {
843 char *data = head->write_buf;
844
845 if (!strcmp(data, "manage_by_non_root")) {
846 tomoyo_manage_by_non_root = !head->w.is_delete;
847 return 0;
848 }
849 return tomoyo_update_manager_entry(data, head->w.is_delete);
850 }
851
852 /**
853 * tomoyo_read_manager - Read manager policy.
854 *
855 * @head: Pointer to "struct tomoyo_io_buffer".
856 *
857 * Caller holds tomoyo_read_lock().
858 */
859 static void tomoyo_read_manager(struct tomoyo_io_buffer *head)
860 {
861 if (head->r.eof)
862 return;
863 list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace.
864 policy_list[TOMOYO_ID_MANAGER]) {
865 struct tomoyo_manager *ptr =
866 list_entry(head->r.acl, typeof(*ptr), head.list);
867 if (ptr->head.is_deleted)
868 continue;
869 if (!tomoyo_flush(head))
870 return;
871 tomoyo_set_string(head, ptr->manager->name);
872 tomoyo_set_lf(head);
873 }
874 head->r.eof = true;
875 }
876
877 /**
878 * tomoyo_manager - Check whether the current process is a policy manager.
879 *
880 * Returns true if the current process is permitted to modify policy
881 * via /sys/kernel/security/tomoyo/ interface.
882 *
883 * Caller holds tomoyo_read_lock().
884 */
885 static bool tomoyo_manager(void)
886 {
887 struct tomoyo_manager *ptr;
888 const char *exe;
889 const struct task_struct *task = current;
890 const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname;
891 bool found = false;
892
893 if (!tomoyo_policy_loaded)
894 return true;
895 if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid))
896 return false;
897 list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.
898 policy_list[TOMOYO_ID_MANAGER], head.list) {
899 if (!ptr->head.is_deleted && ptr->is_domain
900 && !tomoyo_pathcmp(domainname, ptr->manager)) {
901 found = true;
902 break;
903 }
904 }
905 if (found)
906 return true;
907 exe = tomoyo_get_exe();
908 if (!exe)
909 return false;
910 list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.
911 policy_list[TOMOYO_ID_MANAGER], head.list) {
912 if (!ptr->head.is_deleted && !ptr->is_domain
913 && !strcmp(exe, ptr->manager->name)) {
914 found = true;
915 break;
916 }
917 }
918 if (!found) { /* Reduce error messages. */
919 static pid_t last_pid;
920 const pid_t pid = current->pid;
921 if (last_pid != pid) {
922 printk(KERN_WARNING "%s ( %s ) is not permitted to "
923 "update policies.\n", domainname->name, exe);
924 last_pid = pid;
925 }
926 }
927 kfree(exe);
928 return found;
929 }
930
931 /**
932 * tomoyo_select_domain - Parse select command.
933 *
934 * @head: Pointer to "struct tomoyo_io_buffer".
935 * @data: String to parse.
936 *
937 * Returns true on success, false otherwise.
938 *
939 * Caller holds tomoyo_read_lock().
940 */
941 static bool tomoyo_select_domain(struct tomoyo_io_buffer *head,
942 const char *data)
943 {
944 unsigned int pid;
945 struct tomoyo_domain_info *domain = NULL;
946 bool global_pid = false;
947 if (strncmp(data, "select ", 7))
948 return false;
949 data += 7;
950 if (sscanf(data, "pid=%u", &pid) == 1 ||
951 (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
952 struct task_struct *p;
953 rcu_read_lock();
954 read_lock(&tasklist_lock);
955 if (global_pid)
956 p = find_task_by_pid_ns(pid, &init_pid_ns);
957 else
958 p = find_task_by_vpid(pid);
959 if (p)
960 domain = tomoyo_real_domain(p);
961 read_unlock(&tasklist_lock);
962 rcu_read_unlock();
963 } else if (!strncmp(data, "domain=", 7)) {
964 if (tomoyo_domain_def(data + 7))
965 domain = tomoyo_find_domain(data + 7);
966 } else
967 return false;
968 head->w.domain = domain;
969 /* Accessing read_buf is safe because head->io_sem is held. */
970 if (!head->read_buf)
971 return true; /* Do nothing if open(O_WRONLY). */
972 memset(&head->r, 0, sizeof(head->r));
973 head->r.print_this_domain_only = true;
974 if (domain)
975 head->r.domain = &domain->list;
976 else
977 head->r.eof = 1;
978 tomoyo_io_printf(head, "# select %s\n", data);
979 if (domain && domain->is_deleted)
980 tomoyo_io_printf(head, "# This is a deleted domain.\n");
981 return true;
982 }
983
984 /**
985 * tomoyo_delete_domain - Delete a domain.
986 *
987 * @domainname: The name of domain.
988 *
989 * Returns 0.
990 *
991 * Caller holds tomoyo_read_lock().
992 */
993 static int tomoyo_delete_domain(char *domainname)
994 {
995 struct tomoyo_domain_info *domain;
996 struct tomoyo_path_info name;
997
998 name.name = domainname;
999 tomoyo_fill_path_info(&name);
1000 if (mutex_lock_interruptible(&tomoyo_policy_lock))
1001 return 0;
1002 /* Is there an active domain? */
1003 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
1004 /* Never delete tomoyo_kernel_domain */
1005 if (domain == &tomoyo_kernel_domain)
1006 continue;
1007 if (domain->is_deleted ||
1008 tomoyo_pathcmp(domain->domainname, &name))
1009 continue;
1010 domain->is_deleted = true;
1011 break;
1012 }
1013 mutex_unlock(&tomoyo_policy_lock);
1014 return 0;
1015 }
1016
1017 /**
1018 * tomoyo_write_domain2 - Write domain policy.
1019 *
1020 * @ns: Pointer to "struct tomoyo_policy_namespace".
1021 * @list: Pointer to "struct list_head".
1022 * @data: Policy to be interpreted.
1023 * @is_delete: True if it is a delete request.
1024 *
1025 * Returns 0 on success, negative value otherwise.
1026 *
1027 * Caller holds tomoyo_read_lock().
1028 */
1029 static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns,
1030 struct list_head *list, char *data,
1031 const bool is_delete)
1032 {
1033 struct tomoyo_acl_param param = {
1034 .ns = ns,
1035 .list = list,
1036 .data = data,
1037 .is_delete = is_delete,
1038 };
1039 static const struct {
1040 const char *keyword;
1041 int (*write) (struct tomoyo_acl_param *);
1042 } tomoyo_callback[1] = {
1043 { "file ", tomoyo_write_file },
1044 };
1045 u8 i;
1046 for (i = 0; i < 1; i++) {
1047 if (!tomoyo_str_starts(&param.data,
1048 tomoyo_callback[i].keyword))
1049 continue;
1050 return tomoyo_callback[i].write(&param);
1051 }
1052 return -EINVAL;
1053 }
1054
1055 /* String table for domain flags. */
1056 const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = {
1057 [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n",
1058 [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n",
1059 };
1060
1061 /**
1062 * tomoyo_write_domain - Write domain policy.
1063 *
1064 * @head: Pointer to "struct tomoyo_io_buffer".
1065 *
1066 * Returns 0 on success, negative value otherwise.
1067 *
1068 * Caller holds tomoyo_read_lock().
1069 */
1070 static int tomoyo_write_domain(struct tomoyo_io_buffer *head)
1071 {
1072 char *data = head->write_buf;
1073 struct tomoyo_policy_namespace *ns;
1074 struct tomoyo_domain_info *domain = head->w.domain;
1075 const bool is_delete = head->w.is_delete;
1076 bool is_select = !is_delete && tomoyo_str_starts(&data, "select ");
1077 unsigned int profile;
1078 if (*data == '<') {
1079 domain = NULL;
1080 if (is_delete)
1081 tomoyo_delete_domain(data);
1082 else if (is_select)
1083 domain = tomoyo_find_domain(data);
1084 else
1085 domain = tomoyo_assign_domain(data, false);
1086 head->w.domain = domain;
1087 return 0;
1088 }
1089 if (!domain)
1090 return -EINVAL;
1091 ns = domain->ns;
1092 if (sscanf(data, "use_profile %u", &profile) == 1
1093 && profile < TOMOYO_MAX_PROFILES) {
1094 if (!tomoyo_policy_loaded || ns->profile_ptr[profile])
1095 domain->profile = (u8) profile;
1096 return 0;
1097 }
1098 if (sscanf(data, "use_group %u\n", &profile) == 1
1099 && profile < TOMOYO_MAX_ACL_GROUPS) {
1100 if (!is_delete)
1101 domain->group = (u8) profile;
1102 return 0;
1103 }
1104 for (profile = 0; profile < TOMOYO_MAX_DOMAIN_INFO_FLAGS; profile++) {
1105 const char *cp = tomoyo_dif[profile];
1106 if (strncmp(data, cp, strlen(cp) - 1))
1107 continue;
1108 domain->flags[profile] = !is_delete;
1109 return 0;
1110 }
1111 return tomoyo_write_domain2(ns, &domain->acl_info_list, data,
1112 is_delete);
1113 }
1114
1115 /**
1116 * tomoyo_print_condition - Print condition part.
1117 *
1118 * @head: Pointer to "struct tomoyo_io_buffer".
1119 * @cond: Pointer to "struct tomoyo_condition".
1120 *
1121 * Returns true on success, false otherwise.
1122 */
1123 static bool tomoyo_print_condition(struct tomoyo_io_buffer *head,
1124 const struct tomoyo_condition *cond)
1125 {
1126 switch (head->r.cond_step) {
1127 case 0:
1128 head->r.cond_index = 0;
1129 head->r.cond_step++;
1130 /* fall through */
1131 case 1:
1132 {
1133 const u16 condc = cond->condc;
1134 const struct tomoyo_condition_element *condp =
1135 (typeof(condp)) (cond + 1);
1136 const struct tomoyo_number_union *numbers_p =
1137 (typeof(numbers_p)) (condp + condc);
1138 const struct tomoyo_name_union *names_p =
1139 (typeof(names_p))
1140 (numbers_p + cond->numbers_count);
1141 const struct tomoyo_argv *argv =
1142 (typeof(argv)) (names_p + cond->names_count);
1143 const struct tomoyo_envp *envp =
1144 (typeof(envp)) (argv + cond->argc);
1145 u16 skip;
1146 for (skip = 0; skip < head->r.cond_index; skip++) {
1147 const u8 left = condp->left;
1148 const u8 right = condp->right;
1149 condp++;
1150 switch (left) {
1151 case TOMOYO_ARGV_ENTRY:
1152 argv++;
1153 continue;
1154 case TOMOYO_ENVP_ENTRY:
1155 envp++;
1156 continue;
1157 case TOMOYO_NUMBER_UNION:
1158 numbers_p++;
1159 break;
1160 }
1161 switch (right) {
1162 case TOMOYO_NAME_UNION:
1163 names_p++;
1164 break;
1165 case TOMOYO_NUMBER_UNION:
1166 numbers_p++;
1167 break;
1168 }
1169 }
1170 while (head->r.cond_index < condc) {
1171 const u8 match = condp->equals;
1172 const u8 left = condp->left;
1173 const u8 right = condp->right;
1174 if (!tomoyo_flush(head))
1175 return false;
1176 condp++;
1177 head->r.cond_index++;
1178 tomoyo_set_space(head);
1179 switch (left) {
1180 case TOMOYO_ARGV_ENTRY:
1181 tomoyo_io_printf(head,
1182 "exec.argv[%lu]%s=\"",
1183 argv->index, argv->
1184 is_not ? "!" : "");
1185 tomoyo_set_string(head,
1186 argv->value->name);
1187 tomoyo_set_string(head, "\"");
1188 argv++;
1189 continue;
1190 case TOMOYO_ENVP_ENTRY:
1191 tomoyo_set_string(head,
1192 "exec.envp[\"");
1193 tomoyo_set_string(head,
1194 envp->name->name);
1195 tomoyo_io_printf(head, "\"]%s=", envp->
1196 is_not ? "!" : "");
1197 if (envp->value) {
1198 tomoyo_set_string(head, "\"");
1199 tomoyo_set_string(head, envp->
1200 value->name);
1201 tomoyo_set_string(head, "\"");
1202 } else {
1203 tomoyo_set_string(head,
1204 "NULL");
1205 }
1206 envp++;
1207 continue;
1208 case TOMOYO_NUMBER_UNION:
1209 tomoyo_print_number_union_nospace
1210 (head, numbers_p++);
1211 break;
1212 default:
1213 tomoyo_set_string(head,
1214 tomoyo_condition_keyword[left]);
1215 break;
1216 }
1217 tomoyo_set_string(head, match ? "=" : "!=");
1218 switch (right) {
1219 case TOMOYO_NAME_UNION:
1220 tomoyo_print_name_union_quoted
1221 (head, names_p++);
1222 break;
1223 case TOMOYO_NUMBER_UNION:
1224 tomoyo_print_number_union_nospace
1225 (head, numbers_p++);
1226 break;
1227 default:
1228 tomoyo_set_string(head,
1229 tomoyo_condition_keyword[right]);
1230 break;
1231 }
1232 }
1233 }
1234 head->r.cond_step++;
1235 /* fall through */
1236 case 2:
1237 if (!tomoyo_flush(head))
1238 break;
1239 head->r.cond_step++;
1240 /* fall through */
1241 case 3:
1242 tomoyo_set_lf(head);
1243 return true;
1244 }
1245 return false;
1246 }
1247
1248 /**
1249 * tomoyo_set_group - Print "acl_group " header keyword and category name.
1250 *
1251 * @head: Pointer to "struct tomoyo_io_buffer".
1252 * @category: Category name.
1253 *
1254 * Returns nothing.
1255 */
1256 static void tomoyo_set_group(struct tomoyo_io_buffer *head,
1257 const char *category)
1258 {
1259 if (head->type == TOMOYO_EXCEPTIONPOLICY) {
1260 tomoyo_print_namespace(head);
1261 tomoyo_io_printf(head, "acl_group %u ",
1262 head->r.acl_group_index);
1263 }
1264 tomoyo_set_string(head, category);
1265 }
1266
1267 /**
1268 * tomoyo_print_entry - Print an ACL entry.
1269 *
1270 * @head: Pointer to "struct tomoyo_io_buffer".
1271 * @acl: Pointer to an ACL entry.
1272 *
1273 * Returns true on success, false otherwise.
1274 */
1275 static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
1276 struct tomoyo_acl_info *acl)
1277 {
1278 const u8 acl_type = acl->type;
1279 bool first = true;
1280 u8 bit;
1281
1282 if (head->r.print_cond_part)
1283 goto print_cond_part;
1284 if (acl->is_deleted)
1285 return true;
1286 if (!tomoyo_flush(head))
1287 return false;
1288 else if (acl_type == TOMOYO_TYPE_PATH_ACL) {
1289 struct tomoyo_path_acl *ptr =
1290 container_of(acl, typeof(*ptr), head);
1291 const u16 perm = ptr->perm;
1292 for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
1293 if (!(perm & (1 << bit)))
1294 continue;
1295 if (head->r.print_transition_related_only &&
1296 bit != TOMOYO_TYPE_EXECUTE)
1297 continue;
1298 if (first) {
1299 tomoyo_set_group(head, "file ");
1300 first = false;
1301 } else {
1302 tomoyo_set_slash(head);
1303 }
1304 tomoyo_set_string(head, tomoyo_path_keyword[bit]);
1305 }
1306 if (first)
1307 return true;
1308 tomoyo_print_name_union(head, &ptr->name);
1309 } else if (head->r.print_transition_related_only) {
1310 return true;
1311 } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
1312 struct tomoyo_path2_acl *ptr =
1313 container_of(acl, typeof(*ptr), head);
1314 const u8 perm = ptr->perm;
1315 for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) {
1316 if (!(perm & (1 << bit)))
1317 continue;
1318 if (first) {
1319 tomoyo_set_group(head, "file ");
1320 first = false;
1321 } else {
1322 tomoyo_set_slash(head);
1323 }
1324 tomoyo_set_string(head, tomoyo_mac_keywords
1325 [tomoyo_pp2mac[bit]]);
1326 }
1327 if (first)
1328 return true;
1329 tomoyo_print_name_union(head, &ptr->name1);
1330 tomoyo_print_name_union(head, &ptr->name2);
1331 } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) {
1332 struct tomoyo_path_number_acl *ptr =
1333 container_of(acl, typeof(*ptr), head);
1334 const u8 perm = ptr->perm;
1335 for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) {
1336 if (!(perm & (1 << bit)))
1337 continue;
1338 if (first) {
1339 tomoyo_set_group(head, "file ");
1340 first = false;
1341 } else {
1342 tomoyo_set_slash(head);
1343 }
1344 tomoyo_set_string(head, tomoyo_mac_keywords
1345 [tomoyo_pn2mac[bit]]);
1346 }
1347 if (first)
1348 return true;
1349 tomoyo_print_name_union(head, &ptr->name);
1350 tomoyo_print_number_union(head, &ptr->number);
1351 } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
1352 struct tomoyo_mkdev_acl *ptr =
1353 container_of(acl, typeof(*ptr), head);
1354 const u8 perm = ptr->perm;
1355 for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) {
1356 if (!(perm & (1 << bit)))
1357 continue;
1358 if (first) {
1359 tomoyo_set_group(head, "file ");
1360 first = false;
1361 } else {
1362 tomoyo_set_slash(head);
1363 }
1364 tomoyo_set_string(head, tomoyo_mac_keywords
1365 [tomoyo_pnnn2mac[bit]]);
1366 }
1367 if (first)
1368 return true;
1369 tomoyo_print_name_union(head, &ptr->name);
1370 tomoyo_print_number_union(head, &ptr->mode);
1371 tomoyo_print_number_union(head, &ptr->major);
1372 tomoyo_print_number_union(head, &ptr->minor);
1373 } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
1374 struct tomoyo_mount_acl *ptr =
1375 container_of(acl, typeof(*ptr), head);
1376 tomoyo_set_group(head, "file mount");
1377 tomoyo_print_name_union(head, &ptr->dev_name);
1378 tomoyo_print_name_union(head, &ptr->dir_name);
1379 tomoyo_print_name_union(head, &ptr->fs_type);
1380 tomoyo_print_number_union(head, &ptr->flags);
1381 }
1382 if (acl->cond) {
1383 head->r.print_cond_part = true;
1384 head->r.cond_step = 0;
1385 if (!tomoyo_flush(head))
1386 return false;
1387 print_cond_part:
1388 if (!tomoyo_print_condition(head, acl->cond))
1389 return false;
1390 head->r.print_cond_part = false;
1391 } else {
1392 tomoyo_set_lf(head);
1393 }
1394 return true;
1395 }
1396
1397 /**
1398 * tomoyo_read_domain2 - Read domain policy.
1399 *
1400 * @head: Pointer to "struct tomoyo_io_buffer".
1401 * @list: Pointer to "struct list_head".
1402 *
1403 * Caller holds tomoyo_read_lock().
1404 *
1405 * Returns true on success, false otherwise.
1406 */
1407 static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head,
1408 struct list_head *list)
1409 {
1410 list_for_each_cookie(head->r.acl, list) {
1411 struct tomoyo_acl_info *ptr =
1412 list_entry(head->r.acl, typeof(*ptr), list);
1413 if (!tomoyo_print_entry(head, ptr))
1414 return false;
1415 }
1416 head->r.acl = NULL;
1417 return true;
1418 }
1419
1420 /**
1421 * tomoyo_read_domain - Read domain policy.
1422 *
1423 * @head: Pointer to "struct tomoyo_io_buffer".
1424 *
1425 * Caller holds tomoyo_read_lock().
1426 */
1427 static void tomoyo_read_domain(struct tomoyo_io_buffer *head)
1428 {
1429 if (head->r.eof)
1430 return;
1431 list_for_each_cookie(head->r.domain, &tomoyo_domain_list) {
1432 struct tomoyo_domain_info *domain =
1433 list_entry(head->r.domain, typeof(*domain), list);
1434 switch (head->r.step) {
1435 u8 i;
1436 case 0:
1437 if (domain->is_deleted &&
1438 !head->r.print_this_domain_only)
1439 continue;
1440 /* Print domainname and flags. */
1441 tomoyo_set_string(head, domain->domainname->name);
1442 tomoyo_set_lf(head);
1443 tomoyo_io_printf(head, "use_profile %u\n",
1444 domain->profile);
1445 tomoyo_io_printf(head, "use_group %u\n",
1446 domain->group);
1447 for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++)
1448 if (domain->flags[i])
1449 tomoyo_set_string(head, tomoyo_dif[i]);
1450 head->r.step++;
1451 tomoyo_set_lf(head);
1452 /* fall through */
1453 case 1:
1454 if (!tomoyo_read_domain2(head, &domain->acl_info_list))
1455 return;
1456 head->r.step++;
1457 if (!tomoyo_set_lf(head))
1458 return;
1459 /* fall through */
1460 case 2:
1461 head->r.step = 0;
1462 if (head->r.print_this_domain_only)
1463 goto done;
1464 }
1465 }
1466 done:
1467 head->r.eof = true;
1468 }
1469
1470 /**
1471 * tomoyo_write_pid: Specify PID to obtain domainname.
1472 *
1473 * @head: Pointer to "struct tomoyo_io_buffer".
1474 *
1475 * Returns 0.
1476 */
1477 static int tomoyo_write_pid(struct tomoyo_io_buffer *head)
1478 {
1479 head->r.eof = false;
1480 return 0;
1481 }
1482
1483 /**
1484 * tomoyo_read_pid - Get domainname of the specified PID.
1485 *
1486 * @head: Pointer to "struct tomoyo_io_buffer".
1487 *
1488 * Returns the domainname which the specified PID is in on success,
1489 * empty string otherwise.
1490 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1491 * using read()/write() interface rather than sysctl() interface.
1492 */
1493 static void tomoyo_read_pid(struct tomoyo_io_buffer *head)
1494 {
1495 char *buf = head->write_buf;
1496 bool global_pid = false;
1497 unsigned int pid;
1498 struct task_struct *p;
1499 struct tomoyo_domain_info *domain = NULL;
1500
1501 /* Accessing write_buf is safe because head->io_sem is held. */
1502 if (!buf) {
1503 head->r.eof = true;
1504 return; /* Do nothing if open(O_RDONLY). */
1505 }
1506 if (head->r.w_pos || head->r.eof)
1507 return;
1508 head->r.eof = true;
1509 if (tomoyo_str_starts(&buf, "global-pid "))
1510 global_pid = true;
1511 pid = (unsigned int) simple_strtoul(buf, NULL, 10);
1512 rcu_read_lock();
1513 read_lock(&tasklist_lock);
1514 if (global_pid)
1515 p = find_task_by_pid_ns(pid, &init_pid_ns);
1516 else
1517 p = find_task_by_vpid(pid);
1518 if (p)
1519 domain = tomoyo_real_domain(p);
1520 read_unlock(&tasklist_lock);
1521 rcu_read_unlock();
1522 if (!domain)
1523 return;
1524 tomoyo_io_printf(head, "%u %u ", pid, domain->profile);
1525 tomoyo_set_string(head, domain->domainname->name);
1526 }
1527
1528 /* String table for domain transition control keywords. */
1529 static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = {
1530 [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ",
1531 [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ",
1532 [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ",
1533 [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ",
1534 [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ",
1535 [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ",
1536 };
1537
1538 /* String table for grouping keywords. */
1539 static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = {
1540 [TOMOYO_PATH_GROUP] = "path_group ",
1541 [TOMOYO_NUMBER_GROUP] = "number_group ",
1542 };
1543
1544 /**
1545 * tomoyo_write_exception - Write exception policy.
1546 *
1547 * @head: Pointer to "struct tomoyo_io_buffer".
1548 *
1549 * Returns 0 on success, negative value otherwise.
1550 *
1551 * Caller holds tomoyo_read_lock().
1552 */
1553 static int tomoyo_write_exception(struct tomoyo_io_buffer *head)
1554 {
1555 const bool is_delete = head->w.is_delete;
1556 struct tomoyo_acl_param param = {
1557 .ns = head->w.ns,
1558 .is_delete = is_delete,
1559 .data = head->write_buf,
1560 };
1561 u8 i;
1562 if (tomoyo_str_starts(&param.data, "aggregator "))
1563 return tomoyo_write_aggregator(&param);
1564 for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++)
1565 if (tomoyo_str_starts(&param.data, tomoyo_transition_type[i]))
1566 return tomoyo_write_transition_control(&param, i);
1567 for (i = 0; i < TOMOYO_MAX_GROUP; i++)
1568 if (tomoyo_str_starts(&param.data, tomoyo_group_name[i]))
1569 return tomoyo_write_group(&param, i);
1570 if (tomoyo_str_starts(&param.data, "acl_group ")) {
1571 unsigned int group;
1572 char *data;
1573 group = simple_strtoul(param.data, &data, 10);
1574 if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ')
1575 return tomoyo_write_domain2
1576 (head->w.ns, &head->w.ns->acl_group[group],
1577 data, is_delete);
1578 }
1579 return -EINVAL;
1580 }
1581
1582 /**
1583 * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group" list.
1584 *
1585 * @head: Pointer to "struct tomoyo_io_buffer".
1586 * @idx: Index number.
1587 *
1588 * Returns true on success, false otherwise.
1589 *
1590 * Caller holds tomoyo_read_lock().
1591 */
1592 static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx)
1593 {
1594 struct tomoyo_policy_namespace *ns =
1595 container_of(head->r.ns, typeof(*ns), namespace_list);
1596 struct list_head *list = &ns->group_list[idx];
1597 list_for_each_cookie(head->r.group, list) {
1598 struct tomoyo_group *group =
1599 list_entry(head->r.group, typeof(*group), head.list);
1600 list_for_each_cookie(head->r.acl, &group->member_list) {
1601 struct tomoyo_acl_head *ptr =
1602 list_entry(head->r.acl, typeof(*ptr), list);
1603 if (ptr->is_deleted)
1604 continue;
1605 if (!tomoyo_flush(head))
1606 return false;
1607 tomoyo_print_namespace(head);
1608 tomoyo_set_string(head, tomoyo_group_name[idx]);
1609 tomoyo_set_string(head, group->group_name->name);
1610 if (idx == TOMOYO_PATH_GROUP) {
1611 tomoyo_set_space(head);
1612 tomoyo_set_string(head, container_of
1613 (ptr, struct tomoyo_path_group,
1614 head)->member_name->name);
1615 } else if (idx == TOMOYO_NUMBER_GROUP) {
1616 tomoyo_print_number_union(head, &container_of
1617 (ptr,
1618 struct tomoyo_number_group,
1619 head)->number);
1620 }
1621 tomoyo_set_lf(head);
1622 }
1623 head->r.acl = NULL;
1624 }
1625 head->r.group = NULL;
1626 return true;
1627 }
1628
1629 /**
1630 * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
1631 *
1632 * @head: Pointer to "struct tomoyo_io_buffer".
1633 * @idx: Index number.
1634 *
1635 * Returns true on success, false otherwise.
1636 *
1637 * Caller holds tomoyo_read_lock().
1638 */
1639 static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx)
1640 {
1641 struct tomoyo_policy_namespace *ns =
1642 container_of(head->r.ns, typeof(*ns), namespace_list);
1643 struct list_head *list = &ns->policy_list[idx];
1644 list_for_each_cookie(head->r.acl, list) {
1645 struct tomoyo_acl_head *acl =
1646 container_of(head->r.acl, typeof(*acl), list);
1647 if (acl->is_deleted)
1648 continue;
1649 if (!tomoyo_flush(head))
1650 return false;
1651 switch (idx) {
1652 case TOMOYO_ID_TRANSITION_CONTROL:
1653 {
1654 struct tomoyo_transition_control *ptr =
1655 container_of(acl, typeof(*ptr), head);
1656 tomoyo_print_namespace(head);
1657 tomoyo_set_string(head, tomoyo_transition_type
1658 [ptr->type]);
1659 tomoyo_set_string(head, ptr->program ?
1660 ptr->program->name : "any");
1661 tomoyo_set_string(head, " from ");
1662 tomoyo_set_string(head, ptr->domainname ?
1663 ptr->domainname->name :
1664 "any");
1665 }
1666 break;
1667 case TOMOYO_ID_AGGREGATOR:
1668 {
1669 struct tomoyo_aggregator *ptr =
1670 container_of(acl, typeof(*ptr), head);
1671 tomoyo_print_namespace(head);
1672 tomoyo_set_string(head, "aggregator ");
1673 tomoyo_set_string(head,
1674 ptr->original_name->name);
1675 tomoyo_set_space(head);
1676 tomoyo_set_string(head,
1677 ptr->aggregated_name->name);
1678 }
1679 break;
1680 default:
1681 continue;
1682 }
1683 tomoyo_set_lf(head);
1684 }
1685 head->r.acl = NULL;
1686 return true;
1687 }
1688
1689 /**
1690 * tomoyo_read_exception - Read exception policy.
1691 *
1692 * @head: Pointer to "struct tomoyo_io_buffer".
1693 *
1694 * Caller holds tomoyo_read_lock().
1695 */
1696 static void tomoyo_read_exception(struct tomoyo_io_buffer *head)
1697 {
1698 struct tomoyo_policy_namespace *ns =
1699 container_of(head->r.ns, typeof(*ns), namespace_list);
1700 if (head->r.eof)
1701 return;
1702 while (head->r.step < TOMOYO_MAX_POLICY &&
1703 tomoyo_read_policy(head, head->r.step))
1704 head->r.step++;
1705 if (head->r.step < TOMOYO_MAX_POLICY)
1706 return;
1707 while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP &&
1708 tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY))
1709 head->r.step++;
1710 if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP)
1711 return;
1712 while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP
1713 + TOMOYO_MAX_ACL_GROUPS) {
1714 head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY
1715 - TOMOYO_MAX_GROUP;
1716 if (!tomoyo_read_domain2(head, &ns->acl_group
1717 [head->r.acl_group_index]))
1718 return;
1719 head->r.step++;
1720 }
1721 head->r.eof = true;
1722 }
1723
1724 /* Wait queue for kernel -> userspace notification. */
1725 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait);
1726 /* Wait queue for userspace -> kernel notification. */
1727 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait);
1728
1729 /* Structure for query. */
1730 struct tomoyo_query {
1731 struct list_head list;
1732 char *query;
1733 size_t query_len;
1734 unsigned int serial;
1735 u8 timer;
1736 u8 answer;
1737 u8 retry;
1738 };
1739
1740 /* The list for "struct tomoyo_query". */
1741 static LIST_HEAD(tomoyo_query_list);
1742
1743 /* Lock for manipulating tomoyo_query_list. */
1744 static DEFINE_SPINLOCK(tomoyo_query_list_lock);
1745
1746 /*
1747 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1748 * interface.
1749 */
1750 static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
1751
1752 /**
1753 * tomoyo_truncate - Truncate a line.
1754 *
1755 * @str: String to truncate.
1756 *
1757 * Returns length of truncated @str.
1758 */
1759 static int tomoyo_truncate(char *str)
1760 {
1761 char *start = str;
1762 while (*(unsigned char *) str > (unsigned char) ' ')
1763 str++;
1764 *str = '\0';
1765 return strlen(start) + 1;
1766 }
1767
1768 /**
1769 * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
1770 *
1771 * @domain: Pointer to "struct tomoyo_domain_info".
1772 * @header: Lines containing ACL.
1773 *
1774 * Returns nothing.
1775 */
1776 static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header)
1777 {
1778 char *buffer;
1779 char *realpath = NULL;
1780 char *argv0 = NULL;
1781 char *symlink = NULL;
1782 char *cp = strchr(header, '\n');
1783 int len;
1784 if (!cp)
1785 return;
1786 cp = strchr(cp + 1, '\n');
1787 if (!cp)
1788 return;
1789 *cp++ = '\0';
1790 len = strlen(cp) + 1;
1791 /* strstr() will return NULL if ordering is wrong. */
1792 if (*cp == 'f') {
1793 argv0 = strstr(header, " argv[]={ \"");
1794 if (argv0) {
1795 argv0 += 10;
1796 len += tomoyo_truncate(argv0) + 14;
1797 }
1798 realpath = strstr(header, " exec={ realpath=\"");
1799 if (realpath) {
1800 realpath += 8;
1801 len += tomoyo_truncate(realpath) + 6;
1802 }
1803 symlink = strstr(header, " symlink.target=\"");
1804 if (symlink)
1805 len += tomoyo_truncate(symlink + 1) + 1;
1806 }
1807 buffer = kmalloc(len, GFP_NOFS);
1808 if (!buffer)
1809 return;
1810 snprintf(buffer, len - 1, "%s", cp);
1811 if (realpath)
1812 tomoyo_addprintf(buffer, len, " exec.%s", realpath);
1813 if (argv0)
1814 tomoyo_addprintf(buffer, len, " exec.argv[0]=%s", argv0);
1815 if (symlink)
1816 tomoyo_addprintf(buffer, len, "%s", symlink);
1817 tomoyo_normalize_line(buffer);
1818 if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer,
1819 false))
1820 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
1821 kfree(buffer);
1822 }
1823
1824 /**
1825 * tomoyo_supervisor - Ask for the supervisor's decision.
1826 *
1827 * @r: Pointer to "struct tomoyo_request_info".
1828 * @fmt: The printf()'s format string, followed by parameters.
1829 *
1830 * Returns 0 if the supervisor decided to permit the access request which
1831 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
1832 * supervisor decided to retry the access request which violated the policy in
1833 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
1834 */
1835 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
1836 {
1837 va_list args;
1838 int error;
1839 int len;
1840 static unsigned int tomoyo_serial;
1841 struct tomoyo_query entry = { };
1842 bool quota_exceeded = false;
1843 va_start(args, fmt);
1844 len = vsnprintf((char *) &len, 1, fmt, args) + 1;
1845 va_end(args);
1846 /* Write /sys/kernel/security/tomoyo/audit. */
1847 va_start(args, fmt);
1848 tomoyo_write_log2(r, len, fmt, args);
1849 va_end(args);
1850 /* Nothing more to do if granted. */
1851 if (r->granted)
1852 return 0;
1853 if (r->mode)
1854 tomoyo_update_stat(r->mode);
1855 switch (r->mode) {
1856 case TOMOYO_CONFIG_ENFORCING:
1857 error = -EPERM;
1858 if (atomic_read(&tomoyo_query_observers))
1859 break;
1860 goto out;
1861 case TOMOYO_CONFIG_LEARNING:
1862 error = 0;
1863 /* Check max_learning_entry parameter. */
1864 if (tomoyo_domain_quota_is_ok(r))
1865 break;
1866 /* fall through */
1867 default:
1868 return 0;
1869 }
1870 /* Get message. */
1871 va_start(args, fmt);
1872 entry.query = tomoyo_init_log(r, len, fmt, args);
1873 va_end(args);
1874 if (!entry.query)
1875 goto out;
1876 entry.query_len = strlen(entry.query) + 1;
1877 if (!error) {
1878 tomoyo_add_entry(r->domain, entry.query);
1879 goto out;
1880 }
1881 len = tomoyo_round2(entry.query_len);
1882 spin_lock(&tomoyo_query_list_lock);
1883 if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] &&
1884 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len
1885 >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) {
1886 quota_exceeded = true;
1887 } else {
1888 entry.serial = tomoyo_serial++;
1889 entry.retry = r->retry;
1890 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len;
1891 list_add_tail(&entry.list, &tomoyo_query_list);
1892 }
1893 spin_unlock(&tomoyo_query_list_lock);
1894 if (quota_exceeded)
1895 goto out;
1896 /* Give 10 seconds for supervisor's opinion. */
1897 while (entry.timer < 10) {
1898 wake_up_all(&tomoyo_query_wait);
1899 if (wait_event_interruptible_timeout
1900 (tomoyo_answer_wait, entry.answer ||
1901 !atomic_read(&tomoyo_query_observers), HZ))
1902 break;
1903 else
1904 entry.timer++;
1905 }
1906 spin_lock(&tomoyo_query_list_lock);
1907 list_del(&entry.list);
1908 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len;
1909 spin_unlock(&tomoyo_query_list_lock);
1910 switch (entry.answer) {
1911 case 3: /* Asked to retry by administrator. */
1912 error = TOMOYO_RETRY_REQUEST;
1913 r->retry++;
1914 break;
1915 case 1:
1916 /* Granted by administrator. */
1917 error = 0;
1918 break;
1919 default:
1920 /* Timed out or rejected by administrator. */
1921 break;
1922 }
1923 out:
1924 kfree(entry.query);
1925 return error;
1926 }
1927
1928 /**
1929 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
1930 *
1931 * @file: Pointer to "struct file".
1932 * @wait: Pointer to "poll_table".
1933 *
1934 * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise.
1935 *
1936 * Waits for access requests which violated policy in enforcing mode.
1937 */
1938 static int tomoyo_poll_query(struct file *file, poll_table *wait)
1939 {
1940 struct list_head *tmp;
1941 bool found = false;
1942 u8 i;
1943 for (i = 0; i < 2; i++) {
1944 spin_lock(&tomoyo_query_list_lock);
1945 list_for_each(tmp, &tomoyo_query_list) {
1946 struct tomoyo_query *ptr =
1947 list_entry(tmp, typeof(*ptr), list);
1948 if (ptr->answer)
1949 continue;
1950 found = true;
1951 break;
1952 }
1953 spin_unlock(&tomoyo_query_list_lock);
1954 if (found)
1955 return POLLIN | POLLRDNORM;
1956 if (i)
1957 break;
1958 poll_wait(file, &tomoyo_query_wait, wait);
1959 }
1960 return 0;
1961 }
1962
1963 /**
1964 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
1965 *
1966 * @head: Pointer to "struct tomoyo_io_buffer".
1967 */
1968 static void tomoyo_read_query(struct tomoyo_io_buffer *head)
1969 {
1970 struct list_head *tmp;
1971 unsigned int pos = 0;
1972 size_t len = 0;
1973 char *buf;
1974 if (head->r.w_pos)
1975 return;
1976 if (head->read_buf) {
1977 kfree(head->read_buf);
1978 head->read_buf = NULL;
1979 }
1980 spin_lock(&tomoyo_query_list_lock);
1981 list_for_each(tmp, &tomoyo_query_list) {
1982 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
1983 if (ptr->answer)
1984 continue;
1985 if (pos++ != head->r.query_index)
1986 continue;
1987 len = ptr->query_len;
1988 break;
1989 }
1990 spin_unlock(&tomoyo_query_list_lock);
1991 if (!len) {
1992 head->r.query_index = 0;
1993 return;
1994 }
1995 buf = kzalloc(len + 32, GFP_NOFS);
1996 if (!buf)
1997 return;
1998 pos = 0;
1999 spin_lock(&tomoyo_query_list_lock);
2000 list_for_each(tmp, &tomoyo_query_list) {
2001 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2002 if (ptr->answer)
2003 continue;
2004 if (pos++ != head->r.query_index)
2005 continue;
2006 /*
2007 * Some query can be skipped because tomoyo_query_list
2008 * can change, but I don't care.
2009 */
2010 if (len == ptr->query_len)
2011 snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial,
2012 ptr->retry, ptr->query);
2013 break;
2014 }
2015 spin_unlock(&tomoyo_query_list_lock);
2016 if (buf[0]) {
2017 head->read_buf = buf;
2018 head->r.w[head->r.w_pos++] = buf;
2019 head->r.query_index++;
2020 } else {
2021 kfree(buf);
2022 }
2023 }
2024
2025 /**
2026 * tomoyo_write_answer - Write the supervisor's decision.
2027 *
2028 * @head: Pointer to "struct tomoyo_io_buffer".
2029 *
2030 * Returns 0 on success, -EINVAL otherwise.
2031 */
2032 static int tomoyo_write_answer(struct tomoyo_io_buffer *head)
2033 {
2034 char *data = head->write_buf;
2035 struct list_head *tmp;
2036 unsigned int serial;
2037 unsigned int answer;
2038 spin_lock(&tomoyo_query_list_lock);
2039 list_for_each(tmp, &tomoyo_query_list) {
2040 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2041 ptr->timer = 0;
2042 }
2043 spin_unlock(&tomoyo_query_list_lock);
2044 if (sscanf(data, "A%u=%u", &serial, &answer) != 2)
2045 return -EINVAL;
2046 spin_lock(&tomoyo_query_list_lock);
2047 list_for_each(tmp, &tomoyo_query_list) {
2048 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
2049 if (ptr->serial != serial)
2050 continue;
2051 if (!ptr->answer)
2052 ptr->answer = answer;
2053 break;
2054 }
2055 spin_unlock(&tomoyo_query_list_lock);
2056 return 0;
2057 }
2058
2059 /**
2060 * tomoyo_read_version: Get version.
2061 *
2062 * @head: Pointer to "struct tomoyo_io_buffer".
2063 *
2064 * Returns version information.
2065 */
2066 static void tomoyo_read_version(struct tomoyo_io_buffer *head)
2067 {
2068 if (!head->r.eof) {
2069 tomoyo_io_printf(head, "2.4.0");
2070 head->r.eof = true;
2071 }
2072 }
2073
2074 /**
2075 * tomoyo_read_self_domain - Get the current process's domainname.
2076 *
2077 * @head: Pointer to "struct tomoyo_io_buffer".
2078 *
2079 * Returns the current process's domainname.
2080 */
2081 static void tomoyo_read_self_domain(struct tomoyo_io_buffer *head)
2082 {
2083 if (!head->r.eof) {
2084 /*
2085 * tomoyo_domain()->domainname != NULL
2086 * because every process belongs to a domain and
2087 * the domain's name cannot be NULL.
2088 */
2089 tomoyo_io_printf(head, "%s", tomoyo_domain()->domainname->name);
2090 head->r.eof = true;
2091 }
2092 }
2093
2094 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2095 static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = {
2096 [TOMOYO_STAT_POLICY_UPDATES] = "update:",
2097 [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:",
2098 [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:",
2099 [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:",
2100 };
2101
2102 /* String table for /sys/kernel/security/tomoyo/stat interface. */
2103 static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = {
2104 [TOMOYO_MEMORY_POLICY] = "policy:",
2105 [TOMOYO_MEMORY_AUDIT] = "audit log:",
2106 [TOMOYO_MEMORY_QUERY] = "query message:",
2107 };
2108
2109 /* Timestamp counter for last updated. */
2110 static unsigned int tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT];
2111 /* Counter for number of updates. */
2112 static unsigned int tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT];
2113
2114 /**
2115 * tomoyo_update_stat - Update statistic counters.
2116 *
2117 * @index: Index for policy type.
2118 *
2119 * Returns nothing.
2120 */
2121 void tomoyo_update_stat(const u8 index)
2122 {
2123 struct timeval tv;
2124 do_gettimeofday(&tv);
2125 /*
2126 * I don't use atomic operations because race condition is not fatal.
2127 */
2128 tomoyo_stat_updated[index]++;
2129 tomoyo_stat_modified[index] = tv.tv_sec;
2130 }
2131
2132 /**
2133 * tomoyo_read_stat - Read statistic data.
2134 *
2135 * @head: Pointer to "struct tomoyo_io_buffer".
2136 *
2137 * Returns nothing.
2138 */
2139 static void tomoyo_read_stat(struct tomoyo_io_buffer *head)
2140 {
2141 u8 i;
2142 unsigned int total = 0;
2143 if (head->r.eof)
2144 return;
2145 for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) {
2146 tomoyo_io_printf(head, "Policy %-30s %10u",
2147 tomoyo_policy_headers[i],
2148 tomoyo_stat_updated[i]);
2149 if (tomoyo_stat_modified[i]) {
2150 struct tomoyo_time stamp;
2151 tomoyo_convert_time(tomoyo_stat_modified[i], &stamp);
2152 tomoyo_io_printf(head, " (Last: %04u/%02u/%02u "
2153 "%02u:%02u:%02u)",
2154 stamp.year, stamp.month, stamp.day,
2155 stamp.hour, stamp.min, stamp.sec);
2156 }
2157 tomoyo_set_lf(head);
2158 }
2159 for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) {
2160 unsigned int used = tomoyo_memory_used[i];
2161 total += used;
2162 tomoyo_io_printf(head, "Memory used by %-22s %10u",
2163 tomoyo_memory_headers[i], used);
2164 used = tomoyo_memory_quota[i];
2165 if (used)
2166 tomoyo_io_printf(head, " (Quota: %10u)", used);
2167 tomoyo_set_lf(head);
2168 }
2169 tomoyo_io_printf(head, "Total memory used: %10u\n",
2170 total);
2171 head->r.eof = true;
2172 }
2173
2174 /**
2175 * tomoyo_write_stat - Set memory quota.
2176 *
2177 * @head: Pointer to "struct tomoyo_io_buffer".
2178 *
2179 * Returns 0.
2180 */
2181 static int tomoyo_write_stat(struct tomoyo_io_buffer *head)
2182 {
2183 char *data = head->write_buf;
2184 u8 i;
2185 if (tomoyo_str_starts(&data, "Memory used by "))
2186 for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++)
2187 if (tomoyo_str_starts(&data, tomoyo_memory_headers[i]))
2188 sscanf(data, "%u", &tomoyo_memory_quota[i]);
2189 return 0;
2190 }
2191
2192 /**
2193 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
2194 *
2195 * @type: Type of interface.
2196 * @file: Pointer to "struct file".
2197 *
2198 * Returns 0 on success, negative value otherwise.
2199 */
2200 int tomoyo_open_control(const u8 type, struct file *file)
2201 {
2202 struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS);
2203
2204 if (!head)
2205 return -ENOMEM;
2206 mutex_init(&head->io_sem);
2207 head->type = type;
2208 switch (type) {
2209 case TOMOYO_DOMAINPOLICY:
2210 /* /sys/kernel/security/tomoyo/domain_policy */
2211 head->write = tomoyo_write_domain;
2212 head->read = tomoyo_read_domain;
2213 break;
2214 case TOMOYO_EXCEPTIONPOLICY:
2215 /* /sys/kernel/security/tomoyo/exception_policy */
2216 head->write = tomoyo_write_exception;
2217 head->read = tomoyo_read_exception;
2218 break;
2219 case TOMOYO_AUDIT:
2220 /* /sys/kernel/security/tomoyo/audit */
2221 head->poll = tomoyo_poll_log;
2222 head->read = tomoyo_read_log;
2223 break;
2224 case TOMOYO_SELFDOMAIN:
2225 /* /sys/kernel/security/tomoyo/self_domain */
2226 head->read = tomoyo_read_self_domain;
2227 break;
2228 case TOMOYO_PROCESS_STATUS:
2229 /* /sys/kernel/security/tomoyo/.process_status */
2230 head->write = tomoyo_write_pid;
2231 head->read = tomoyo_read_pid;
2232 break;
2233 case TOMOYO_VERSION:
2234 /* /sys/kernel/security/tomoyo/version */
2235 head->read = tomoyo_read_version;
2236 head->readbuf_size = 128;
2237 break;
2238 case TOMOYO_STAT:
2239 /* /sys/kernel/security/tomoyo/stat */
2240 head->write = tomoyo_write_stat;
2241 head->read = tomoyo_read_stat;
2242 head->readbuf_size = 1024;
2243 break;
2244 case TOMOYO_PROFILE:
2245 /* /sys/kernel/security/tomoyo/profile */
2246 head->write = tomoyo_write_profile;
2247 head->read = tomoyo_read_profile;
2248 break;
2249 case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */
2250 head->poll = tomoyo_poll_query;
2251 head->write = tomoyo_write_answer;
2252 head->read = tomoyo_read_query;
2253 break;
2254 case TOMOYO_MANAGER:
2255 /* /sys/kernel/security/tomoyo/manager */
2256 head->write = tomoyo_write_manager;
2257 head->read = tomoyo_read_manager;
2258 break;
2259 }
2260 if (!(file->f_mode & FMODE_READ)) {
2261 /*
2262 * No need to allocate read_buf since it is not opened
2263 * for reading.
2264 */
2265 head->read = NULL;
2266 head->poll = NULL;
2267 } else if (!head->poll) {
2268 /* Don't allocate read_buf for poll() access. */
2269 if (!head->readbuf_size)
2270 head->readbuf_size = 4096 * 2;
2271 head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS);
2272 if (!head->read_buf) {
2273 kfree(head);
2274 return -ENOMEM;
2275 }
2276 }
2277 if (!(file->f_mode & FMODE_WRITE)) {
2278 /*
2279 * No need to allocate write_buf since it is not opened
2280 * for writing.
2281 */
2282 head->write = NULL;
2283 } else if (head->write) {
2284 head->writebuf_size = 4096 * 2;
2285 head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS);
2286 if (!head->write_buf) {
2287 kfree(head->read_buf);
2288 kfree(head);
2289 return -ENOMEM;
2290 }
2291 }
2292 /*
2293 * If the file is /sys/kernel/security/tomoyo/query , increment the
2294 * observer counter.
2295 * The obserber counter is used by tomoyo_supervisor() to see if
2296 * there is some process monitoring /sys/kernel/security/tomoyo/query.
2297 */
2298 if (type == TOMOYO_QUERY)
2299 atomic_inc(&tomoyo_query_observers);
2300 file->private_data = head;
2301 tomoyo_notify_gc(head, true);
2302 return 0;
2303 }
2304
2305 /**
2306 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
2307 *
2308 * @file: Pointer to "struct file".
2309 * @wait: Pointer to "poll_table".
2310 *
2311 * Waits for read readiness.
2312 * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd and
2313 * /sys/kernel/security/tomoyo/audit is handled by /usr/sbin/tomoyo-auditd.
2314 */
2315 int tomoyo_poll_control(struct file *file, poll_table *wait)
2316 {
2317 struct tomoyo_io_buffer *head = file->private_data;
2318 if (!head->poll)
2319 return -ENOSYS;
2320 return head->poll(file, wait);
2321 }
2322
2323 /**
2324 * tomoyo_set_namespace_cursor - Set namespace to read.
2325 *
2326 * @head: Pointer to "struct tomoyo_io_buffer".
2327 *
2328 * Returns nothing.
2329 */
2330 static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head)
2331 {
2332 struct list_head *ns;
2333 if (head->type != TOMOYO_EXCEPTIONPOLICY &&
2334 head->type != TOMOYO_PROFILE)
2335 return;
2336 /*
2337 * If this is the first read, or reading previous namespace finished
2338 * and has more namespaces to read, update the namespace cursor.
2339 */
2340 ns = head->r.ns;
2341 if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) {
2342 /* Clearing is OK because tomoyo_flush() returned true. */
2343 memset(&head->r, 0, sizeof(head->r));
2344 head->r.ns = ns ? ns->next : tomoyo_namespace_list.next;
2345 }
2346 }
2347
2348 /**
2349 * tomoyo_has_more_namespace - Check for unread namespaces.
2350 *
2351 * @head: Pointer to "struct tomoyo_io_buffer".
2352 *
2353 * Returns true if we have more entries to print, false otherwise.
2354 */
2355 static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head)
2356 {
2357 return (head->type == TOMOYO_EXCEPTIONPOLICY ||
2358 head->type == TOMOYO_PROFILE) && head->r.eof &&
2359 head->r.ns->next != &tomoyo_namespace_list;
2360 }
2361
2362 /**
2363 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
2364 *
2365 * @head: Pointer to "struct tomoyo_io_buffer".
2366 * @buffer: Poiner to buffer to write to.
2367 * @buffer_len: Size of @buffer.
2368 *
2369 * Returns bytes read on success, negative value otherwise.
2370 */
2371 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
2372 const int buffer_len)
2373 {
2374 int len;
2375 int idx;
2376
2377 if (!head->read)
2378 return -ENOSYS;
2379 if (mutex_lock_interruptible(&head->io_sem))
2380 return -EINTR;
2381 head->read_user_buf = buffer;
2382 head->read_user_buf_avail = buffer_len;
2383 idx = tomoyo_read_lock();
2384 if (tomoyo_flush(head))
2385 /* Call the policy handler. */
2386 do {
2387 tomoyo_set_namespace_cursor(head);
2388 head->read(head);
2389 } while (tomoyo_flush(head) &&
2390 tomoyo_has_more_namespace(head));
2391 tomoyo_read_unlock(idx);
2392 len = head->read_user_buf - buffer;
2393 mutex_unlock(&head->io_sem);
2394 return len;
2395 }
2396
2397 /**
2398 * tomoyo_parse_policy - Parse a policy line.
2399 *
2400 * @head: Poiter to "struct tomoyo_io_buffer".
2401 * @line: Line to parse.
2402 *
2403 * Returns 0 on success, negative value otherwise.
2404 *
2405 * Caller holds tomoyo_read_lock().
2406 */
2407 static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line)
2408 {
2409 /* Delete request? */
2410 head->w.is_delete = !strncmp(line, "delete ", 7);
2411 if (head->w.is_delete)
2412 memmove(line, line + 7, strlen(line + 7) + 1);
2413 /* Selecting namespace to update. */
2414 if (head->type == TOMOYO_EXCEPTIONPOLICY ||
2415 head->type == TOMOYO_PROFILE) {
2416 if (*line == '<') {
2417 char *cp = strchr(line, ' ');
2418 if (cp) {
2419 *cp++ = '\0';
2420 head->w.ns = tomoyo_assign_namespace(line);
2421 memmove(line, cp, strlen(cp) + 1);
2422 } else
2423 head->w.ns = NULL;
2424 } else
2425 head->w.ns = &tomoyo_kernel_namespace;
2426 /* Don't allow updating if namespace is invalid. */
2427 if (!head->w.ns)
2428 return -ENOENT;
2429 }
2430 /* Do the update. */
2431 return head->write(head);
2432 }
2433
2434 /**
2435 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
2436 *
2437 * @head: Pointer to "struct tomoyo_io_buffer".
2438 * @buffer: Pointer to buffer to read from.
2439 * @buffer_len: Size of @buffer.
2440 *
2441 * Returns @buffer_len on success, negative value otherwise.
2442 */
2443 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
2444 const char __user *buffer, const int buffer_len)
2445 {
2446 int error = buffer_len;
2447 size_t avail_len = buffer_len;
2448 char *cp0 = head->write_buf;
2449 int idx;
2450 if (!head->write)
2451 return -ENOSYS;
2452 if (!access_ok(VERIFY_READ, buffer, buffer_len))
2453 return -EFAULT;
2454 if (mutex_lock_interruptible(&head->io_sem))
2455 return -EINTR;
2456 idx = tomoyo_read_lock();
2457 /* Read a line and dispatch it to the policy handler. */
2458 while (avail_len > 0) {
2459 char c;
2460 if (head->w.avail >= head->writebuf_size - 1) {
2461 const int len = head->writebuf_size * 2;
2462 char *cp = kzalloc(len, GFP_NOFS);
2463 if (!cp) {
2464 error = -ENOMEM;
2465 break;
2466 }
2467 memmove(cp, cp0, head->w.avail);
2468 kfree(cp0);
2469 head->write_buf = cp;
2470 cp0 = cp;
2471 head->writebuf_size = len;
2472 }
2473 if (get_user(c, buffer)) {
2474 error = -EFAULT;
2475 break;
2476 }
2477 buffer++;
2478 avail_len--;
2479 cp0[head->w.avail++] = c;
2480 if (c != '\n')
2481 continue;
2482 cp0[head->w.avail - 1] = '\0';
2483 head->w.avail = 0;
2484 tomoyo_normalize_line(cp0);
2485 if (!strcmp(cp0, "reset")) {
2486 head->w.ns = &tomoyo_kernel_namespace;
2487 head->w.domain = NULL;
2488 memset(&head->r, 0, sizeof(head->r));
2489 continue;
2490 }
2491 /* Don't allow updating policies by non manager programs. */
2492 switch (head->type) {
2493 case TOMOYO_PROCESS_STATUS:
2494 /* This does not write anything. */
2495 break;
2496 case TOMOYO_DOMAINPOLICY:
2497 if (tomoyo_select_domain(head, cp0))
2498 continue;
2499 /* fall through */
2500 case TOMOYO_EXCEPTIONPOLICY:
2501 if (!strcmp(cp0, "select transition_only")) {
2502 head->r.print_transition_related_only = true;
2503 continue;
2504 }
2505 /* fall through */
2506 default:
2507 if (!tomoyo_manager()) {
2508 error = -EPERM;
2509 goto out;
2510 }
2511 }
2512 switch (tomoyo_parse_policy(head, cp0)) {
2513 case -EPERM:
2514 error = -EPERM;
2515 goto out;
2516 case 0:
2517 switch (head->type) {
2518 case TOMOYO_DOMAINPOLICY:
2519 case TOMOYO_EXCEPTIONPOLICY:
2520 case TOMOYO_STAT:
2521 case TOMOYO_PROFILE:
2522 case TOMOYO_MANAGER:
2523 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
2524 break;
2525 default:
2526 break;
2527 }
2528 break;
2529 }
2530 }
2531 out:
2532 tomoyo_read_unlock(idx);
2533 mutex_unlock(&head->io_sem);
2534 return error;
2535 }
2536
2537 /**
2538 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
2539 *
2540 * @head: Pointer to "struct tomoyo_io_buffer".
2541 *
2542 * Returns 0.
2543 */
2544 int tomoyo_close_control(struct tomoyo_io_buffer *head)
2545 {
2546 /*
2547 * If the file is /sys/kernel/security/tomoyo/query , decrement the
2548 * observer counter.
2549 */
2550 if (head->type == TOMOYO_QUERY &&
2551 atomic_dec_and_test(&tomoyo_query_observers))
2552 wake_up_all(&tomoyo_answer_wait);
2553 tomoyo_notify_gc(head, false);
2554 return 0;
2555 }
2556
2557 /**
2558 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
2559 */
2560 void tomoyo_check_profile(void)
2561 {
2562 struct tomoyo_domain_info *domain;
2563 const int idx = tomoyo_read_lock();
2564 tomoyo_policy_loaded = true;
2565 printk(KERN_INFO "TOMOYO: 2.4.0\n");
2566 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
2567 const u8 profile = domain->profile;
2568 const struct tomoyo_policy_namespace *ns = domain->ns;
2569 if (ns->profile_version != 20100903)
2570 printk(KERN_ERR
2571 "Profile version %u is not supported.\n",
2572 ns->profile_version);
2573 else if (!ns->profile_ptr[profile])
2574 printk(KERN_ERR
2575 "Profile %u (used by '%s') is not defined.\n",
2576 profile, domain->domainname->name);
2577 else
2578 continue;
2579 printk(KERN_ERR
2580 "Userland tools for TOMOYO 2.4 must be installed and "
2581 "policy must be initialized.\n");
2582 printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/2.4/ "
2583 "for more information.\n");
2584 panic("STOP!");
2585 }
2586 tomoyo_read_unlock(idx);
2587 printk(KERN_INFO "Mandatory Access Control activated.\n");
2588 }
2589
2590 /**
2591 * tomoyo_load_builtin_policy - Load built-in policy.
2592 *
2593 * Returns nothing.
2594 */
2595 void __init tomoyo_load_builtin_policy(void)
2596 {
2597 /*
2598 * This include file is manually created and contains built-in policy
2599 * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy",
2600 * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager",
2601 * "tomoyo_builtin_stat" in the form of "static char [] __initdata".
2602 */
2603 #include "builtin-policy.h"
2604 u8 i;
2605 const int idx = tomoyo_read_lock();
2606 for (i = 0; i < 5; i++) {
2607 struct tomoyo_io_buffer head = { };
2608 char *start = "";
2609 switch (i) {
2610 case 0:
2611 start = tomoyo_builtin_profile;
2612 head.type = TOMOYO_PROFILE;
2613 head.write = tomoyo_write_profile;
2614 break;
2615 case 1:
2616 start = tomoyo_builtin_exception_policy;
2617 head.type = TOMOYO_EXCEPTIONPOLICY;
2618 head.write = tomoyo_write_exception;
2619 break;
2620 case 2:
2621 start = tomoyo_builtin_domain_policy;
2622 head.type = TOMOYO_DOMAINPOLICY;
2623 head.write = tomoyo_write_domain;
2624 break;
2625 case 3:
2626 start = tomoyo_builtin_manager;
2627 head.type = TOMOYO_MANAGER;
2628 head.write = tomoyo_write_manager;
2629 break;
2630 case 4:
2631 start = tomoyo_builtin_stat;
2632 head.type = TOMOYO_STAT;
2633 head.write = tomoyo_write_stat;
2634 break;
2635 }
2636 while (1) {
2637 char *end = strchr(start, '\n');
2638 if (!end)
2639 break;
2640 *end = '\0';
2641 tomoyo_normalize_line(start);
2642 head.write_buf = start;
2643 tomoyo_parse_policy(&head, start);
2644 start = end + 1;
2645 }
2646 }
2647 tomoyo_read_unlock(idx);
2648 #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
2649 tomoyo_check_profile();
2650 #endif
2651 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree