Commit | Line | Data |
---|---|---|
9590837b KT |
1 | /* |
2 | * security/tomoyo/common.c | |
3 | * | |
4 | * Common functions for TOMOYO. | |
5 | * | |
c3ef1500 | 6 | * Copyright (C) 2005-2010 NTT DATA CORPORATION |
9590837b KT |
7 | */ |
8 | ||
9 | #include <linux/uaccess.h> | |
5a0e3ad6 | 10 | #include <linux/slab.h> |
9590837b | 11 | #include <linux/security.h> |
9590837b | 12 | #include "common.h" |
9590837b | 13 | |
eadd99cc TH |
14 | /* String table for operation mode. */ |
15 | const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = { | |
16 | [TOMOYO_CONFIG_DISABLED] = "disabled", | |
17 | [TOMOYO_CONFIG_LEARNING] = "learning", | |
18 | [TOMOYO_CONFIG_PERMISSIVE] = "permissive", | |
19 | [TOMOYO_CONFIG_ENFORCING] = "enforcing" | |
9590837b | 20 | }; |
9590837b | 21 | |
57c2590f | 22 | /* String table for /sys/kernel/security/tomoyo/profile */ |
2c47ab93 | 23 | const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX |
57c2590f | 24 | + TOMOYO_MAX_MAC_CATEGORY_INDEX] = { |
2c47ab93 TH |
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", | |
57c2590f | 48 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file", |
9590837b KT |
49 | }; |
50 | ||
2066a361 TH |
51 | /* String table for conditions. */ |
52 | const char * const tomoyo_condition_keyword[TOMOYO_MAX_CONDITION_KEYWORD] = { | |
53 | [TOMOYO_TASK_UID] = "task.uid", | |
54 | [TOMOYO_TASK_EUID] = "task.euid", | |
55 | [TOMOYO_TASK_SUID] = "task.suid", | |
56 | [TOMOYO_TASK_FSUID] = "task.fsuid", | |
57 | [TOMOYO_TASK_GID] = "task.gid", | |
58 | [TOMOYO_TASK_EGID] = "task.egid", | |
59 | [TOMOYO_TASK_SGID] = "task.sgid", | |
60 | [TOMOYO_TASK_FSGID] = "task.fsgid", | |
61 | [TOMOYO_TASK_PID] = "task.pid", | |
62 | [TOMOYO_TASK_PPID] = "task.ppid", | |
63 | }; | |
64 | ||
d5ca1725 TH |
65 | /* String table for PREFERENCE keyword. */ |
66 | static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = { | |
eadd99cc | 67 | [TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log", |
d5ca1725 TH |
68 | [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry", |
69 | }; | |
70 | ||
2c47ab93 TH |
71 | /* String table for path operation. */ |
72 | const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = { | |
73 | [TOMOYO_TYPE_EXECUTE] = "execute", | |
74 | [TOMOYO_TYPE_READ] = "read", | |
75 | [TOMOYO_TYPE_WRITE] = "write", | |
76 | [TOMOYO_TYPE_APPEND] = "append", | |
77 | [TOMOYO_TYPE_UNLINK] = "unlink", | |
78 | [TOMOYO_TYPE_GETATTR] = "getattr", | |
79 | [TOMOYO_TYPE_RMDIR] = "rmdir", | |
80 | [TOMOYO_TYPE_TRUNCATE] = "truncate", | |
81 | [TOMOYO_TYPE_SYMLINK] = "symlink", | |
82 | [TOMOYO_TYPE_CHROOT] = "chroot", | |
83 | [TOMOYO_TYPE_UMOUNT] = "unmount", | |
84 | }; | |
85 | ||
86 | /* String table for categories. */ | |
87 | static const char * const tomoyo_category_keywords | |
88 | [TOMOYO_MAX_MAC_CATEGORY_INDEX] = { | |
89 | [TOMOYO_MAC_CATEGORY_FILE] = "file", | |
90 | }; | |
91 | ||
9590837b KT |
92 | /* Permit policy management by non-root user? */ |
93 | static bool tomoyo_manage_by_non_root; | |
94 | ||
95 | /* Utility functions. */ | |
96 | ||
57c2590f TH |
97 | /** |
98 | * tomoyo_yesno - Return "yes" or "no". | |
99 | * | |
100 | * @value: Bool value. | |
101 | */ | |
eadd99cc | 102 | const char *tomoyo_yesno(const unsigned int value) |
57c2590f TH |
103 | { |
104 | return value ? "yes" : "no"; | |
105 | } | |
106 | ||
d5ca1725 TH |
107 | /** |
108 | * tomoyo_addprintf - strncat()-like-snprintf(). | |
109 | * | |
110 | * @buffer: Buffer to write to. Must be '\0'-terminated. | |
111 | * @len: Size of @buffer. | |
112 | * @fmt: The printf()'s format string, followed by parameters. | |
113 | * | |
114 | * Returns nothing. | |
115 | */ | |
f23571e8 TH |
116 | static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...) |
117 | { | |
118 | va_list args; | |
119 | const int pos = strlen(buffer); | |
120 | va_start(args, fmt); | |
121 | vsnprintf(buffer + pos, len - pos - 1, fmt, args); | |
122 | va_end(args); | |
123 | } | |
124 | ||
7762fbff | 125 | /** |
f23571e8 | 126 | * tomoyo_flush - Flush queued string to userspace's buffer. |
7762fbff | 127 | * |
f23571e8 | 128 | * @head: Pointer to "struct tomoyo_io_buffer". |
7762fbff | 129 | * |
f23571e8 | 130 | * Returns true if all data was flushed, false otherwise. |
7762fbff | 131 | */ |
f23571e8 | 132 | static bool tomoyo_flush(struct tomoyo_io_buffer *head) |
7762fbff | 133 | { |
f23571e8 TH |
134 | while (head->r.w_pos) { |
135 | const char *w = head->r.w[0]; | |
2c47ab93 | 136 | size_t len = strlen(w); |
f23571e8 TH |
137 | if (len) { |
138 | if (len > head->read_user_buf_avail) | |
139 | len = head->read_user_buf_avail; | |
140 | if (!len) | |
141 | return false; | |
142 | if (copy_to_user(head->read_user_buf, w, len)) | |
143 | return false; | |
144 | head->read_user_buf_avail -= len; | |
145 | head->read_user_buf += len; | |
146 | w += len; | |
147 | } | |
c0fa797a TH |
148 | head->r.w[0] = w; |
149 | if (*w) | |
f23571e8 | 150 | return false; |
eadd99cc | 151 | /* Add '\0' for audit logs and query. */ |
f23571e8 TH |
152 | if (head->poll) { |
153 | if (!head->read_user_buf_avail || | |
154 | copy_to_user(head->read_user_buf, "", 1)) | |
155 | return false; | |
156 | head->read_user_buf_avail--; | |
157 | head->read_user_buf++; | |
158 | } | |
159 | head->r.w_pos--; | |
160 | for (len = 0; len < head->r.w_pos; len++) | |
161 | head->r.w[len] = head->r.w[len + 1]; | |
162 | } | |
163 | head->r.avail = 0; | |
164 | return true; | |
7762fbff TH |
165 | } |
166 | ||
4c3e9e2d | 167 | /** |
f23571e8 | 168 | * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure. |
4c3e9e2d | 169 | * |
f23571e8 TH |
170 | * @head: Pointer to "struct tomoyo_io_buffer". |
171 | * @string: String to print. | |
4c3e9e2d | 172 | * |
f23571e8 TH |
173 | * Note that @string has to be kept valid until @head is kfree()d. |
174 | * This means that char[] allocated on stack memory cannot be passed to | |
175 | * this function. Use tomoyo_io_printf() for char[] allocated on stack memory. | |
4c3e9e2d | 176 | */ |
f23571e8 | 177 | static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string) |
4c3e9e2d | 178 | { |
f23571e8 TH |
179 | if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) { |
180 | head->r.w[head->r.w_pos++] = string; | |
181 | tomoyo_flush(head); | |
182 | } else | |
183 | WARN_ON(1); | |
4c3e9e2d TH |
184 | } |
185 | ||
9590837b | 186 | /** |
f23571e8 | 187 | * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure. |
9590837b KT |
188 | * |
189 | * @head: Pointer to "struct tomoyo_io_buffer". | |
190 | * @fmt: The printf()'s format string, followed by parameters. | |
9590837b | 191 | */ |
f23571e8 | 192 | void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...) |
9590837b KT |
193 | { |
194 | va_list args; | |
2c47ab93 TH |
195 | size_t len; |
196 | size_t pos = head->r.avail; | |
9590837b | 197 | int size = head->readbuf_size - pos; |
9590837b | 198 | if (size <= 0) |
f23571e8 | 199 | return; |
9590837b | 200 | va_start(args, fmt); |
f23571e8 | 201 | len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1; |
9590837b | 202 | va_end(args); |
f23571e8 TH |
203 | if (pos + len >= head->readbuf_size) { |
204 | WARN_ON(1); | |
205 | return; | |
206 | } | |
207 | head->r.avail += len; | |
208 | tomoyo_set_string(head, head->read_buf + pos); | |
209 | } | |
210 | ||
0d2171d7 TH |
211 | /** |
212 | * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure. | |
213 | * | |
214 | * @head: Pointer to "struct tomoyo_io_buffer". | |
215 | * | |
216 | * Returns nothing. | |
217 | */ | |
f23571e8 TH |
218 | static void tomoyo_set_space(struct tomoyo_io_buffer *head) |
219 | { | |
220 | tomoyo_set_string(head, " "); | |
221 | } | |
222 | ||
0d2171d7 TH |
223 | /** |
224 | * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure. | |
225 | * | |
226 | * @head: Pointer to "struct tomoyo_io_buffer". | |
227 | * | |
228 | * Returns nothing. | |
229 | */ | |
f23571e8 TH |
230 | static bool tomoyo_set_lf(struct tomoyo_io_buffer *head) |
231 | { | |
232 | tomoyo_set_string(head, "\n"); | |
233 | return !head->r.w_pos; | |
234 | } | |
235 | ||
0d2171d7 TH |
236 | /** |
237 | * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure. | |
238 | * | |
239 | * @head: Pointer to "struct tomoyo_io_buffer". | |
240 | * | |
241 | * Returns nothing. | |
242 | */ | |
243 | static void tomoyo_set_slash(struct tomoyo_io_buffer *head) | |
244 | { | |
245 | tomoyo_set_string(head, "/"); | |
246 | } | |
247 | ||
bd03a3e4 TH |
248 | /* List of namespaces. */ |
249 | LIST_HEAD(tomoyo_namespace_list); | |
250 | /* True if namespace other than tomoyo_kernel_namespace is defined. */ | |
251 | static bool tomoyo_namespace_enabled; | |
252 | ||
253 | /** | |
254 | * tomoyo_init_policy_namespace - Initialize namespace. | |
255 | * | |
256 | * @ns: Pointer to "struct tomoyo_policy_namespace". | |
257 | * | |
258 | * Returns nothing. | |
259 | */ | |
260 | void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns) | |
261 | { | |
262 | unsigned int idx; | |
263 | for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++) | |
264 | INIT_LIST_HEAD(&ns->acl_group[idx]); | |
265 | for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++) | |
266 | INIT_LIST_HEAD(&ns->group_list[idx]); | |
267 | for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++) | |
268 | INIT_LIST_HEAD(&ns->policy_list[idx]); | |
269 | ns->profile_version = 20100903; | |
270 | tomoyo_namespace_enabled = !list_empty(&tomoyo_namespace_list); | |
271 | list_add_tail_rcu(&ns->namespace_list, &tomoyo_namespace_list); | |
272 | } | |
273 | ||
274 | /** | |
275 | * tomoyo_print_namespace - Print namespace header. | |
276 | * | |
277 | * @head: Pointer to "struct tomoyo_io_buffer". | |
278 | * | |
279 | * Returns nothing. | |
280 | */ | |
281 | static void tomoyo_print_namespace(struct tomoyo_io_buffer *head) | |
282 | { | |
283 | if (!tomoyo_namespace_enabled) | |
284 | return; | |
285 | tomoyo_set_string(head, | |
286 | container_of(head->r.ns, | |
287 | struct tomoyo_policy_namespace, | |
288 | namespace_list)->name); | |
289 | tomoyo_set_space(head); | |
290 | } | |
291 | ||
f23571e8 TH |
292 | /** |
293 | * tomoyo_print_name_union - Print a tomoyo_name_union. | |
294 | * | |
295 | * @head: Pointer to "struct tomoyo_io_buffer". | |
296 | * @ptr: Pointer to "struct tomoyo_name_union". | |
297 | */ | |
298 | static void tomoyo_print_name_union(struct tomoyo_io_buffer *head, | |
299 | const struct tomoyo_name_union *ptr) | |
300 | { | |
301 | tomoyo_set_space(head); | |
0df7e8b8 | 302 | if (ptr->group) { |
f23571e8 TH |
303 | tomoyo_set_string(head, "@"); |
304 | tomoyo_set_string(head, ptr->group->group_name->name); | |
305 | } else { | |
306 | tomoyo_set_string(head, ptr->filename->name); | |
307 | } | |
308 | } | |
309 | ||
310 | /** | |
2066a361 | 311 | * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space. |
f23571e8 | 312 | * |
2066a361 TH |
313 | * @head: Pointer to "struct tomoyo_io_buffer". |
314 | * @ptr: Pointer to "struct tomoyo_number_union". | |
315 | * | |
316 | * Returns nothing. | |
f23571e8 | 317 | */ |
2066a361 TH |
318 | static void tomoyo_print_number_union_nospace |
319 | (struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr) | |
f23571e8 | 320 | { |
0df7e8b8 | 321 | if (ptr->group) { |
f23571e8 TH |
322 | tomoyo_set_string(head, "@"); |
323 | tomoyo_set_string(head, ptr->group->group_name->name); | |
324 | } else { | |
325 | int i; | |
326 | unsigned long min = ptr->values[0]; | |
327 | const unsigned long max = ptr->values[1]; | |
0df7e8b8 TH |
328 | u8 min_type = ptr->value_type[0]; |
329 | const u8 max_type = ptr->value_type[1]; | |
f23571e8 TH |
330 | char buffer[128]; |
331 | buffer[0] = '\0'; | |
332 | for (i = 0; i < 2; i++) { | |
333 | switch (min_type) { | |
334 | case TOMOYO_VALUE_TYPE_HEXADECIMAL: | |
335 | tomoyo_addprintf(buffer, sizeof(buffer), | |
336 | "0x%lX", min); | |
337 | break; | |
338 | case TOMOYO_VALUE_TYPE_OCTAL: | |
339 | tomoyo_addprintf(buffer, sizeof(buffer), | |
340 | "0%lo", min); | |
341 | break; | |
342 | default: | |
2066a361 TH |
343 | tomoyo_addprintf(buffer, sizeof(buffer), "%lu", |
344 | min); | |
f23571e8 TH |
345 | break; |
346 | } | |
347 | if (min == max && min_type == max_type) | |
348 | break; | |
349 | tomoyo_addprintf(buffer, sizeof(buffer), "-"); | |
350 | min_type = max_type; | |
351 | min = max; | |
352 | } | |
353 | tomoyo_io_printf(head, "%s", buffer); | |
354 | } | |
9590837b KT |
355 | } |
356 | ||
2066a361 TH |
357 | /** |
358 | * tomoyo_print_number_union - Print a tomoyo_number_union. | |
359 | * | |
360 | * @head: Pointer to "struct tomoyo_io_buffer". | |
361 | * @ptr: Pointer to "struct tomoyo_number_union". | |
362 | * | |
363 | * Returns nothing. | |
364 | */ | |
365 | static void tomoyo_print_number_union(struct tomoyo_io_buffer *head, | |
366 | const struct tomoyo_number_union *ptr) | |
367 | { | |
368 | tomoyo_set_space(head); | |
369 | tomoyo_print_number_union_nospace(head, ptr); | |
370 | } | |
371 | ||
9590837b | 372 | /** |
e2bf6907 | 373 | * tomoyo_assign_profile - Create a new profile. |
9590837b | 374 | * |
bd03a3e4 | 375 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
9590837b KT |
376 | * @profile: Profile number to create. |
377 | * | |
378 | * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise. | |
379 | */ | |
bd03a3e4 TH |
380 | static struct tomoyo_profile *tomoyo_assign_profile |
381 | (struct tomoyo_policy_namespace *ns, const unsigned int profile) | |
9590837b | 382 | { |
57c2590f TH |
383 | struct tomoyo_profile *ptr; |
384 | struct tomoyo_profile *entry; | |
9590837b KT |
385 | if (profile >= TOMOYO_MAX_PROFILES) |
386 | return NULL; | |
bd03a3e4 | 387 | ptr = ns->profile_ptr[profile]; |
9590837b | 388 | if (ptr) |
57c2590f TH |
389 | return ptr; |
390 | entry = kzalloc(sizeof(*entry), GFP_NOFS); | |
391 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) | |
392 | goto out; | |
bd03a3e4 | 393 | ptr = ns->profile_ptr[profile]; |
57c2590f TH |
394 | if (!ptr && tomoyo_memory_ok(entry)) { |
395 | ptr = entry; | |
eadd99cc TH |
396 | ptr->default_config = TOMOYO_CONFIG_DISABLED | |
397 | TOMOYO_CONFIG_WANT_GRANT_LOG | | |
398 | TOMOYO_CONFIG_WANT_REJECT_LOG; | |
57c2590f TH |
399 | memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT, |
400 | sizeof(ptr->config)); | |
eadd99cc | 401 | ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] = 1024; |
d5ca1725 | 402 | ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] = 2048; |
57c2590f | 403 | mb(); /* Avoid out-of-order execution. */ |
bd03a3e4 | 404 | ns->profile_ptr[profile] = ptr; |
57c2590f | 405 | entry = NULL; |
cd7bec6a | 406 | } |
29282381 | 407 | mutex_unlock(&tomoyo_policy_lock); |
57c2590f TH |
408 | out: |
409 | kfree(entry); | |
9590837b KT |
410 | return ptr; |
411 | } | |
412 | ||
413 | /** | |
57c2590f TH |
414 | * tomoyo_profile - Find a profile. |
415 | * | |
bd03a3e4 | 416 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
57c2590f TH |
417 | * @profile: Profile number to find. |
418 | * | |
419 | * Returns pointer to "struct tomoyo_profile". | |
420 | */ | |
bd03a3e4 TH |
421 | struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns, |
422 | const u8 profile) | |
57c2590f | 423 | { |
d5ca1725 | 424 | static struct tomoyo_profile tomoyo_null_profile; |
bd03a3e4 | 425 | struct tomoyo_profile *ptr = ns->profile_ptr[profile]; |
d5ca1725 TH |
426 | if (!ptr) |
427 | ptr = &tomoyo_null_profile; | |
57c2590f TH |
428 | return ptr; |
429 | } | |
430 | ||
d5ca1725 TH |
431 | /** |
432 | * tomoyo_find_yesno - Find values for specified keyword. | |
433 | * | |
434 | * @string: String to check. | |
435 | * @find: Name of keyword. | |
436 | * | |
437 | * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise. | |
438 | */ | |
8e568687 TH |
439 | static s8 tomoyo_find_yesno(const char *string, const char *find) |
440 | { | |
441 | const char *cp = strstr(string, find); | |
442 | if (cp) { | |
443 | cp += strlen(find); | |
444 | if (!strncmp(cp, "=yes", 4)) | |
445 | return 1; | |
446 | else if (!strncmp(cp, "=no", 3)) | |
447 | return 0; | |
448 | } | |
449 | return -1; | |
450 | } | |
451 | ||
d5ca1725 TH |
452 | /** |
453 | * tomoyo_set_uint - Set value for specified preference. | |
454 | * | |
455 | * @i: Pointer to "unsigned int". | |
456 | * @string: String to check. | |
457 | * @find: Name of keyword. | |
458 | * | |
459 | * Returns nothing. | |
460 | */ | |
8e568687 TH |
461 | static void tomoyo_set_uint(unsigned int *i, const char *string, |
462 | const char *find) | |
463 | { | |
464 | const char *cp = strstr(string, find); | |
465 | if (cp) | |
466 | sscanf(cp + strlen(find), "=%u", i); | |
467 | } | |
468 | ||
d5ca1725 TH |
469 | /** |
470 | * tomoyo_set_mode - Set mode for specified profile. | |
471 | * | |
472 | * @name: Name of functionality. | |
473 | * @value: Mode for @name. | |
474 | * @profile: Pointer to "struct tomoyo_profile". | |
475 | * | |
476 | * Returns 0 on success, negative value otherwise. | |
477 | */ | |
8e568687 | 478 | static int tomoyo_set_mode(char *name, const char *value, |
8e568687 TH |
479 | struct tomoyo_profile *profile) |
480 | { | |
481 | u8 i; | |
482 | u8 config; | |
483 | if (!strcmp(name, "CONFIG")) { | |
484 | i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX; | |
485 | config = profile->default_config; | |
486 | } else if (tomoyo_str_starts(&name, "CONFIG::")) { | |
487 | config = 0; | |
488 | for (i = 0; i < TOMOYO_MAX_MAC_INDEX | |
489 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) { | |
2c47ab93 TH |
490 | int len = 0; |
491 | if (i < TOMOYO_MAX_MAC_INDEX) { | |
492 | const u8 c = tomoyo_index2category[i]; | |
493 | const char *category = | |
494 | tomoyo_category_keywords[c]; | |
495 | len = strlen(category); | |
496 | if (strncmp(name, category, len) || | |
497 | name[len++] != ':' || name[len++] != ':') | |
498 | continue; | |
499 | } | |
500 | if (strcmp(name + len, tomoyo_mac_keywords[i])) | |
8e568687 TH |
501 | continue; |
502 | config = profile->config[i]; | |
503 | break; | |
504 | } | |
505 | if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) | |
506 | return -EINVAL; | |
507 | } else { | |
508 | return -EINVAL; | |
509 | } | |
d5ca1725 | 510 | if (strstr(value, "use_default")) { |
8e568687 TH |
511 | config = TOMOYO_CONFIG_USE_DEFAULT; |
512 | } else { | |
513 | u8 mode; | |
514 | for (mode = 0; mode < 4; mode++) | |
515 | if (strstr(value, tomoyo_mode[mode])) | |
516 | /* | |
517 | * Update lower 3 bits in order to distinguish | |
518 | * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'. | |
519 | */ | |
520 | config = (config & ~7) | mode; | |
eadd99cc TH |
521 | if (config != TOMOYO_CONFIG_USE_DEFAULT) { |
522 | switch (tomoyo_find_yesno(value, "grant_log")) { | |
523 | case 1: | |
524 | config |= TOMOYO_CONFIG_WANT_GRANT_LOG; | |
525 | break; | |
526 | case 0: | |
527 | config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG; | |
528 | break; | |
529 | } | |
530 | switch (tomoyo_find_yesno(value, "reject_log")) { | |
531 | case 1: | |
532 | config |= TOMOYO_CONFIG_WANT_REJECT_LOG; | |
533 | break; | |
534 | case 0: | |
535 | config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG; | |
536 | break; | |
537 | } | |
538 | } | |
8e568687 TH |
539 | } |
540 | if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) | |
541 | profile->config[i] = config; | |
542 | else if (config != TOMOYO_CONFIG_USE_DEFAULT) | |
543 | profile->default_config = config; | |
544 | return 0; | |
545 | } | |
546 | ||
57c2590f TH |
547 | /** |
548 | * tomoyo_write_profile - Write profile table. | |
9590837b KT |
549 | * |
550 | * @head: Pointer to "struct tomoyo_io_buffer". | |
551 | * | |
552 | * Returns 0 on success, negative value otherwise. | |
553 | */ | |
554 | static int tomoyo_write_profile(struct tomoyo_io_buffer *head) | |
555 | { | |
556 | char *data = head->write_buf; | |
557 | unsigned int i; | |
9590837b KT |
558 | char *cp; |
559 | struct tomoyo_profile *profile; | |
bd03a3e4 TH |
560 | if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version) |
561 | == 1) | |
57c2590f TH |
562 | return 0; |
563 | i = simple_strtoul(data, &cp, 10); | |
d5ca1725 TH |
564 | if (*cp != '-') |
565 | return -EINVAL; | |
566 | data = cp + 1; | |
bd03a3e4 | 567 | profile = tomoyo_assign_profile(head->w.ns, i); |
d5ca1725 TH |
568 | if (!profile) |
569 | return -EINVAL; | |
9590837b KT |
570 | cp = strchr(data, '='); |
571 | if (!cp) | |
572 | return -EINVAL; | |
57c2590f | 573 | *cp++ = '\0'; |
9590837b | 574 | if (!strcmp(data, "COMMENT")) { |
2a086e5d TH |
575 | static DEFINE_SPINLOCK(lock); |
576 | const struct tomoyo_path_info *new_comment | |
577 | = tomoyo_get_name(cp); | |
578 | const struct tomoyo_path_info *old_comment; | |
579 | if (!new_comment) | |
580 | return -ENOMEM; | |
581 | spin_lock(&lock); | |
582 | old_comment = profile->comment; | |
583 | profile->comment = new_comment; | |
584 | spin_unlock(&lock); | |
bf24fb01 | 585 | tomoyo_put_name(old_comment); |
9590837b KT |
586 | return 0; |
587 | } | |
d5ca1725 TH |
588 | if (!strcmp(data, "PREFERENCE")) { |
589 | for (i = 0; i < TOMOYO_MAX_PREF; i++) | |
590 | tomoyo_set_uint(&profile->pref[i], cp, | |
591 | tomoyo_pref_keywords[i]); | |
592 | return 0; | |
f23571e8 | 593 | } |
d5ca1725 | 594 | return tomoyo_set_mode(data, cp, profile); |
f23571e8 TH |
595 | } |
596 | ||
eadd99cc TH |
597 | /** |
598 | * tomoyo_print_config - Print mode for specified functionality. | |
599 | * | |
600 | * @head: Pointer to "struct tomoyo_io_buffer". | |
601 | * @config: Mode for that functionality. | |
602 | * | |
603 | * Returns nothing. | |
604 | * | |
605 | * Caller prints functionality's name. | |
606 | */ | |
f23571e8 TH |
607 | static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config) |
608 | { | |
eadd99cc TH |
609 | tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n", |
610 | tomoyo_mode[config & 3], | |
611 | tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG), | |
612 | tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG)); | |
f23571e8 TH |
613 | } |
614 | ||
9590837b | 615 | /** |
57c2590f | 616 | * tomoyo_read_profile - Read profile table. |
9590837b KT |
617 | * |
618 | * @head: Pointer to "struct tomoyo_io_buffer". | |
eadd99cc TH |
619 | * |
620 | * Returns nothing. | |
9590837b | 621 | */ |
8fbe71f0 | 622 | static void tomoyo_read_profile(struct tomoyo_io_buffer *head) |
9590837b | 623 | { |
f23571e8 | 624 | u8 index; |
bd03a3e4 TH |
625 | struct tomoyo_policy_namespace *ns = |
626 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
f23571e8 | 627 | const struct tomoyo_profile *profile; |
bd03a3e4 TH |
628 | if (head->r.eof) |
629 | return; | |
f23571e8 TH |
630 | next: |
631 | index = head->r.index; | |
bd03a3e4 | 632 | profile = ns->profile_ptr[index]; |
f23571e8 TH |
633 | switch (head->r.step) { |
634 | case 0: | |
bd03a3e4 TH |
635 | tomoyo_print_namespace(head); |
636 | tomoyo_io_printf(head, "PROFILE_VERSION=%u\n", | |
637 | ns->profile_version); | |
f23571e8 TH |
638 | head->r.step++; |
639 | break; | |
640 | case 1: | |
641 | for ( ; head->r.index < TOMOYO_MAX_PROFILES; | |
642 | head->r.index++) | |
bd03a3e4 | 643 | if (ns->profile_ptr[head->r.index]) |
f23571e8 TH |
644 | break; |
645 | if (head->r.index == TOMOYO_MAX_PROFILES) | |
646 | return; | |
647 | head->r.step++; | |
648 | break; | |
649 | case 2: | |
650 | { | |
d5ca1725 | 651 | u8 i; |
f23571e8 TH |
652 | const struct tomoyo_path_info *comment = |
653 | profile->comment; | |
bd03a3e4 | 654 | tomoyo_print_namespace(head); |
f23571e8 TH |
655 | tomoyo_io_printf(head, "%u-COMMENT=", index); |
656 | tomoyo_set_string(head, comment ? comment->name : ""); | |
657 | tomoyo_set_lf(head); | |
d5ca1725 TH |
658 | tomoyo_io_printf(head, "%u-PREFERENCE={ ", index); |
659 | for (i = 0; i < TOMOYO_MAX_PREF; i++) | |
660 | tomoyo_io_printf(head, "%s=%u ", | |
661 | tomoyo_pref_keywords[i], | |
662 | profile->pref[i]); | |
663 | tomoyo_set_string(head, "}\n"); | |
f23571e8 TH |
664 | head->r.step++; |
665 | } | |
666 | break; | |
667 | case 3: | |
668 | { | |
bd03a3e4 | 669 | tomoyo_print_namespace(head); |
f23571e8 TH |
670 | tomoyo_io_printf(head, "%u-%s", index, "CONFIG"); |
671 | tomoyo_print_config(head, profile->default_config); | |
672 | head->r.bit = 0; | |
673 | head->r.step++; | |
674 | } | |
675 | break; | |
676 | case 4: | |
677 | for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX | |
678 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) { | |
679 | const u8 i = head->r.bit; | |
680 | const u8 config = profile->config[i]; | |
57c2590f TH |
681 | if (config == TOMOYO_CONFIG_USE_DEFAULT) |
682 | continue; | |
bd03a3e4 | 683 | tomoyo_print_namespace(head); |
2c47ab93 TH |
684 | if (i < TOMOYO_MAX_MAC_INDEX) |
685 | tomoyo_io_printf(head, "%u-CONFIG::%s::%s", | |
686 | index, | |
687 | tomoyo_category_keywords | |
688 | [tomoyo_index2category[i]], | |
689 | tomoyo_mac_keywords[i]); | |
690 | else | |
691 | tomoyo_io_printf(head, "%u-CONFIG::%s", index, | |
692 | tomoyo_mac_keywords[i]); | |
f23571e8 TH |
693 | tomoyo_print_config(head, config); |
694 | head->r.bit++; | |
695 | break; | |
696 | } | |
697 | if (head->r.bit == TOMOYO_MAX_MAC_INDEX | |
698 | + TOMOYO_MAX_MAC_CATEGORY_INDEX) { | |
f23571e8 TH |
699 | head->r.index++; |
700 | head->r.step = 1; | |
9590837b | 701 | } |
57c2590f | 702 | break; |
9590837b | 703 | } |
f23571e8 TH |
704 | if (tomoyo_flush(head)) |
705 | goto next; | |
9590837b KT |
706 | } |
707 | ||
e2bf6907 TH |
708 | static bool tomoyo_same_manager(const struct tomoyo_acl_head *a, |
709 | const struct tomoyo_acl_head *b) | |
36f5e1ff | 710 | { |
e2bf6907 TH |
711 | return container_of(a, struct tomoyo_manager, head)->manager == |
712 | container_of(b, struct tomoyo_manager, head)->manager; | |
36f5e1ff TH |
713 | } |
714 | ||
9590837b KT |
715 | /** |
716 | * tomoyo_update_manager_entry - Add a manager entry. | |
717 | * | |
718 | * @manager: The path to manager or the domainnamme. | |
719 | * @is_delete: True if it is a delete request. | |
720 | * | |
721 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
722 | * |
723 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
724 | */ |
725 | static int tomoyo_update_manager_entry(const char *manager, | |
726 | const bool is_delete) | |
727 | { | |
e2bf6907 | 728 | struct tomoyo_manager e = { }; |
a238cf5b | 729 | struct tomoyo_acl_param param = { |
bd03a3e4 | 730 | /* .ns = &tomoyo_kernel_namespace, */ |
a238cf5b | 731 | .is_delete = is_delete, |
bd03a3e4 TH |
732 | .list = &tomoyo_kernel_namespace. |
733 | policy_list[TOMOYO_ID_MANAGER], | |
a238cf5b TH |
734 | }; |
735 | int error = is_delete ? -ENOENT : -ENOMEM; | |
75093152 TH |
736 | if (tomoyo_domain_def(manager)) { |
737 | if (!tomoyo_correct_domain(manager)) | |
9590837b | 738 | return -EINVAL; |
9e4b50e9 | 739 | e.is_domain = true; |
9590837b | 740 | } else { |
75093152 | 741 | if (!tomoyo_correct_path(manager)) |
9590837b KT |
742 | return -EINVAL; |
743 | } | |
9e4b50e9 | 744 | e.manager = tomoyo_get_name(manager); |
a238cf5b TH |
745 | if (e.manager) { |
746 | error = tomoyo_update_policy(&e.head, sizeof(e), ¶m, | |
747 | tomoyo_same_manager); | |
748 | tomoyo_put_name(e.manager); | |
749 | } | |
9590837b KT |
750 | return error; |
751 | } | |
752 | ||
753 | /** | |
e2bf6907 | 754 | * tomoyo_write_manager - Write manager policy. |
9590837b KT |
755 | * |
756 | * @head: Pointer to "struct tomoyo_io_buffer". | |
757 | * | |
758 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
759 | * |
760 | * Caller holds tomoyo_read_lock(). | |
9590837b | 761 | */ |
e2bf6907 | 762 | static int tomoyo_write_manager(struct tomoyo_io_buffer *head) |
9590837b KT |
763 | { |
764 | char *data = head->write_buf; | |
9590837b KT |
765 | |
766 | if (!strcmp(data, "manage_by_non_root")) { | |
bd03a3e4 | 767 | tomoyo_manage_by_non_root = !head->w.is_delete; |
9590837b KT |
768 | return 0; |
769 | } | |
bd03a3e4 | 770 | return tomoyo_update_manager_entry(data, head->w.is_delete); |
9590837b KT |
771 | } |
772 | ||
773 | /** | |
e2bf6907 | 774 | * tomoyo_read_manager - Read manager policy. |
9590837b KT |
775 | * |
776 | * @head: Pointer to "struct tomoyo_io_buffer". | |
777 | * | |
fdb8ebb7 | 778 | * Caller holds tomoyo_read_lock(). |
9590837b | 779 | */ |
e2bf6907 | 780 | static void tomoyo_read_manager(struct tomoyo_io_buffer *head) |
9590837b | 781 | { |
f23571e8 | 782 | if (head->r.eof) |
8fbe71f0 | 783 | return; |
bd03a3e4 TH |
784 | list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace. |
785 | policy_list[TOMOYO_ID_MANAGER]) { | |
e2bf6907 | 786 | struct tomoyo_manager *ptr = |
f23571e8 | 787 | list_entry(head->r.acl, typeof(*ptr), head.list); |
82e0f001 | 788 | if (ptr->head.is_deleted) |
9590837b | 789 | continue; |
f23571e8 TH |
790 | if (!tomoyo_flush(head)) |
791 | return; | |
792 | tomoyo_set_string(head, ptr->manager->name); | |
793 | tomoyo_set_lf(head); | |
9590837b | 794 | } |
f23571e8 | 795 | head->r.eof = true; |
9590837b KT |
796 | } |
797 | ||
798 | /** | |
e2bf6907 | 799 | * tomoyo_manager - Check whether the current process is a policy manager. |
9590837b KT |
800 | * |
801 | * Returns true if the current process is permitted to modify policy | |
802 | * via /sys/kernel/security/tomoyo/ interface. | |
fdb8ebb7 TH |
803 | * |
804 | * Caller holds tomoyo_read_lock(). | |
9590837b | 805 | */ |
e2bf6907 | 806 | static bool tomoyo_manager(void) |
9590837b | 807 | { |
e2bf6907 | 808 | struct tomoyo_manager *ptr; |
9590837b KT |
809 | const char *exe; |
810 | const struct task_struct *task = current; | |
811 | const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname; | |
812 | bool found = false; | |
813 | ||
814 | if (!tomoyo_policy_loaded) | |
815 | return true; | |
816 | if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid)) | |
817 | return false; | |
bd03a3e4 TH |
818 | list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace. |
819 | policy_list[TOMOYO_ID_MANAGER], head.list) { | |
82e0f001 | 820 | if (!ptr->head.is_deleted && ptr->is_domain |
9590837b KT |
821 | && !tomoyo_pathcmp(domainname, ptr->manager)) { |
822 | found = true; | |
823 | break; | |
824 | } | |
825 | } | |
9590837b KT |
826 | if (found) |
827 | return true; | |
828 | exe = tomoyo_get_exe(); | |
829 | if (!exe) | |
830 | return false; | |
bd03a3e4 TH |
831 | list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace. |
832 | policy_list[TOMOYO_ID_MANAGER], head.list) { | |
82e0f001 | 833 | if (!ptr->head.is_deleted && !ptr->is_domain |
9590837b KT |
834 | && !strcmp(exe, ptr->manager->name)) { |
835 | found = true; | |
836 | break; | |
837 | } | |
838 | } | |
9590837b KT |
839 | if (!found) { /* Reduce error messages. */ |
840 | static pid_t last_pid; | |
841 | const pid_t pid = current->pid; | |
842 | if (last_pid != pid) { | |
843 | printk(KERN_WARNING "%s ( %s ) is not permitted to " | |
844 | "update policies.\n", domainname->name, exe); | |
845 | last_pid = pid; | |
846 | } | |
847 | } | |
8e2d39a1 | 848 | kfree(exe); |
9590837b KT |
849 | return found; |
850 | } | |
851 | ||
852 | /** | |
bd03a3e4 | 853 | * tomoyo_select_domain - Parse select command. |
9590837b KT |
854 | * |
855 | * @head: Pointer to "struct tomoyo_io_buffer". | |
856 | * @data: String to parse. | |
857 | * | |
858 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
859 | * |
860 | * Caller holds tomoyo_read_lock(). | |
9590837b | 861 | */ |
bd03a3e4 TH |
862 | static bool tomoyo_select_domain(struct tomoyo_io_buffer *head, |
863 | const char *data) | |
9590837b KT |
864 | { |
865 | unsigned int pid; | |
866 | struct tomoyo_domain_info *domain = NULL; | |
9b244373 | 867 | bool global_pid = false; |
bd03a3e4 TH |
868 | if (strncmp(data, "select ", 7)) |
869 | return false; | |
870 | data += 7; | |
9b244373 TH |
871 | if (sscanf(data, "pid=%u", &pid) == 1 || |
872 | (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) { | |
9590837b | 873 | struct task_struct *p; |
1fcdc7c5 | 874 | rcu_read_lock(); |
9590837b | 875 | read_lock(&tasklist_lock); |
9b244373 TH |
876 | if (global_pid) |
877 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
878 | else | |
879 | p = find_task_by_vpid(pid); | |
9590837b KT |
880 | if (p) |
881 | domain = tomoyo_real_domain(p); | |
882 | read_unlock(&tasklist_lock); | |
1fcdc7c5 | 883 | rcu_read_unlock(); |
9590837b | 884 | } else if (!strncmp(data, "domain=", 7)) { |
75093152 | 885 | if (tomoyo_domain_def(data + 7)) |
9590837b | 886 | domain = tomoyo_find_domain(data + 7); |
9590837b KT |
887 | } else |
888 | return false; | |
0df7e8b8 | 889 | head->w.domain = domain; |
9590837b KT |
890 | /* Accessing read_buf is safe because head->io_sem is held. */ |
891 | if (!head->read_buf) | |
892 | return true; /* Do nothing if open(O_WRONLY). */ | |
f23571e8 TH |
893 | memset(&head->r, 0, sizeof(head->r)); |
894 | head->r.print_this_domain_only = true; | |
68eda8f5 DC |
895 | if (domain) |
896 | head->r.domain = &domain->list; | |
897 | else | |
898 | head->r.eof = 1; | |
9590837b | 899 | tomoyo_io_printf(head, "# select %s\n", data); |
475e6fa3 TH |
900 | if (domain && domain->is_deleted) |
901 | tomoyo_io_printf(head, "# This is a deleted domain.\n"); | |
9590837b KT |
902 | return true; |
903 | } | |
904 | ||
ccf135f5 TH |
905 | /** |
906 | * tomoyo_delete_domain - Delete a domain. | |
907 | * | |
908 | * @domainname: The name of domain. | |
909 | * | |
910 | * Returns 0. | |
fdb8ebb7 TH |
911 | * |
912 | * Caller holds tomoyo_read_lock(). | |
ccf135f5 TH |
913 | */ |
914 | static int tomoyo_delete_domain(char *domainname) | |
915 | { | |
916 | struct tomoyo_domain_info *domain; | |
917 | struct tomoyo_path_info name; | |
918 | ||
919 | name.name = domainname; | |
920 | tomoyo_fill_path_info(&name); | |
29282381 TH |
921 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
922 | return 0; | |
ccf135f5 | 923 | /* Is there an active domain? */ |
fdb8ebb7 | 924 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
ccf135f5 TH |
925 | /* Never delete tomoyo_kernel_domain */ |
926 | if (domain == &tomoyo_kernel_domain) | |
927 | continue; | |
928 | if (domain->is_deleted || | |
929 | tomoyo_pathcmp(domain->domainname, &name)) | |
930 | continue; | |
931 | domain->is_deleted = true; | |
932 | break; | |
933 | } | |
f737d95d | 934 | mutex_unlock(&tomoyo_policy_lock); |
ccf135f5 TH |
935 | return 0; |
936 | } | |
937 | ||
17fcfbd9 | 938 | /** |
e2bf6907 | 939 | * tomoyo_write_domain2 - Write domain policy. |
17fcfbd9 | 940 | * |
bd03a3e4 | 941 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
a238cf5b TH |
942 | * @list: Pointer to "struct list_head". |
943 | * @data: Policy to be interpreted. | |
944 | * @is_delete: True if it is a delete request. | |
17fcfbd9 TH |
945 | * |
946 | * Returns 0 on success, negative value otherwise. | |
947 | * | |
948 | * Caller holds tomoyo_read_lock(). | |
949 | */ | |
bd03a3e4 TH |
950 | static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns, |
951 | struct list_head *list, char *data, | |
e2bf6907 | 952 | const bool is_delete) |
17fcfbd9 | 953 | { |
a238cf5b | 954 | struct tomoyo_acl_param param = { |
bd03a3e4 | 955 | .ns = ns, |
a238cf5b TH |
956 | .list = list, |
957 | .data = data, | |
958 | .is_delete = is_delete, | |
959 | }; | |
960 | static const struct { | |
961 | const char *keyword; | |
962 | int (*write) (struct tomoyo_acl_param *); | |
963 | } tomoyo_callback[1] = { | |
964 | { "file ", tomoyo_write_file }, | |
965 | }; | |
966 | u8 i; | |
967 | for (i = 0; i < 1; i++) { | |
968 | if (!tomoyo_str_starts(¶m.data, | |
969 | tomoyo_callback[i].keyword)) | |
970 | continue; | |
971 | return tomoyo_callback[i].write(¶m); | |
972 | } | |
973 | return -EINVAL; | |
17fcfbd9 TH |
974 | } |
975 | ||
2c47ab93 TH |
976 | /* String table for domain flags. */ |
977 | const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = { | |
978 | [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n", | |
979 | [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n", | |
980 | }; | |
981 | ||
9590837b | 982 | /** |
e2bf6907 | 983 | * tomoyo_write_domain - Write domain policy. |
9590837b KT |
984 | * |
985 | * @head: Pointer to "struct tomoyo_io_buffer". | |
986 | * | |
987 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
988 | * |
989 | * Caller holds tomoyo_read_lock(). | |
9590837b | 990 | */ |
e2bf6907 | 991 | static int tomoyo_write_domain(struct tomoyo_io_buffer *head) |
9590837b KT |
992 | { |
993 | char *data = head->write_buf; | |
bd03a3e4 | 994 | struct tomoyo_policy_namespace *ns; |
0df7e8b8 | 995 | struct tomoyo_domain_info *domain = head->w.domain; |
bd03a3e4 TH |
996 | const bool is_delete = head->w.is_delete; |
997 | bool is_select = !is_delete && tomoyo_str_starts(&data, "select "); | |
9590837b | 998 | unsigned int profile; |
bd03a3e4 | 999 | if (*data == '<') { |
9590837b KT |
1000 | domain = NULL; |
1001 | if (is_delete) | |
1002 | tomoyo_delete_domain(data); | |
fdb8ebb7 | 1003 | else if (is_select) |
9590837b | 1004 | domain = tomoyo_find_domain(data); |
fdb8ebb7 | 1005 | else |
bd03a3e4 | 1006 | domain = tomoyo_assign_domain(data, false); |
0df7e8b8 | 1007 | head->w.domain = domain; |
9590837b KT |
1008 | return 0; |
1009 | } | |
1010 | if (!domain) | |
1011 | return -EINVAL; | |
bd03a3e4 | 1012 | ns = domain->ns; |
b5bc60b4 | 1013 | if (sscanf(data, "use_profile %u", &profile) == 1 |
9590837b | 1014 | && profile < TOMOYO_MAX_PROFILES) { |
bd03a3e4 | 1015 | if (!tomoyo_policy_loaded || ns->profile_ptr[profile]) |
9590837b KT |
1016 | domain->profile = (u8) profile; |
1017 | return 0; | |
1018 | } | |
32997144 TH |
1019 | if (sscanf(data, "use_group %u\n", &profile) == 1 |
1020 | && profile < TOMOYO_MAX_ACL_GROUPS) { | |
1021 | if (!is_delete) | |
1022 | domain->group = (u8) profile; | |
1023 | return 0; | |
1024 | } | |
2c47ab93 TH |
1025 | for (profile = 0; profile < TOMOYO_MAX_DOMAIN_INFO_FLAGS; profile++) { |
1026 | const char *cp = tomoyo_dif[profile]; | |
1027 | if (strncmp(data, cp, strlen(cp) - 1)) | |
1028 | continue; | |
1029 | domain->flags[profile] = !is_delete; | |
9b244373 TH |
1030 | return 0; |
1031 | } | |
bd03a3e4 TH |
1032 | return tomoyo_write_domain2(ns, &domain->acl_info_list, data, |
1033 | is_delete); | |
9590837b KT |
1034 | } |
1035 | ||
2066a361 TH |
1036 | /** |
1037 | * tomoyo_print_condition - Print condition part. | |
1038 | * | |
1039 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1040 | * @cond: Pointer to "struct tomoyo_condition". | |
1041 | * | |
1042 | * Returns true on success, false otherwise. | |
1043 | */ | |
1044 | static bool tomoyo_print_condition(struct tomoyo_io_buffer *head, | |
1045 | const struct tomoyo_condition *cond) | |
1046 | { | |
1047 | switch (head->r.cond_step) { | |
1048 | case 0: | |
1049 | head->r.cond_index = 0; | |
1050 | head->r.cond_step++; | |
1051 | /* fall through */ | |
1052 | case 1: | |
1053 | { | |
1054 | const u16 condc = cond->condc; | |
1055 | const struct tomoyo_condition_element *condp = | |
1056 | (typeof(condp)) (cond + 1); | |
1057 | const struct tomoyo_number_union *numbers_p = | |
1058 | (typeof(numbers_p)) (condp + condc); | |
1059 | u16 skip; | |
1060 | for (skip = 0; skip < head->r.cond_index; skip++) { | |
1061 | const u8 left = condp->left; | |
1062 | const u8 right = condp->right; | |
1063 | condp++; | |
1064 | switch (left) { | |
1065 | case TOMOYO_NUMBER_UNION: | |
1066 | numbers_p++; | |
1067 | break; | |
1068 | } | |
1069 | switch (right) { | |
1070 | case TOMOYO_NUMBER_UNION: | |
1071 | numbers_p++; | |
1072 | break; | |
1073 | } | |
1074 | } | |
1075 | while (head->r.cond_index < condc) { | |
1076 | const u8 match = condp->equals; | |
1077 | const u8 left = condp->left; | |
1078 | const u8 right = condp->right; | |
1079 | if (!tomoyo_flush(head)) | |
1080 | return false; | |
1081 | condp++; | |
1082 | head->r.cond_index++; | |
1083 | tomoyo_set_space(head); | |
1084 | switch (left) { | |
1085 | case TOMOYO_NUMBER_UNION: | |
1086 | tomoyo_print_number_union_nospace | |
1087 | (head, numbers_p++); | |
1088 | break; | |
1089 | default: | |
1090 | tomoyo_set_string(head, | |
1091 | tomoyo_condition_keyword[left]); | |
1092 | break; | |
1093 | } | |
1094 | tomoyo_set_string(head, match ? "=" : "!="); | |
1095 | switch (right) { | |
1096 | case TOMOYO_NUMBER_UNION: | |
1097 | tomoyo_print_number_union_nospace | |
1098 | (head, numbers_p++); | |
1099 | break; | |
1100 | default: | |
1101 | tomoyo_set_string(head, | |
1102 | tomoyo_condition_keyword[right]); | |
1103 | break; | |
1104 | } | |
1105 | } | |
1106 | } | |
1107 | head->r.cond_step++; | |
1108 | /* fall through */ | |
1109 | case 2: | |
1110 | if (!tomoyo_flush(head)) | |
1111 | break; | |
1112 | head->r.cond_step++; | |
1113 | /* fall through */ | |
1114 | case 3: | |
1115 | tomoyo_set_lf(head); | |
1116 | return true; | |
1117 | } | |
1118 | return false; | |
1119 | } | |
1120 | ||
9590837b | 1121 | /** |
32997144 | 1122 | * tomoyo_set_group - Print "acl_group " header keyword and category name. |
9590837b | 1123 | * |
0d2171d7 TH |
1124 | * @head: Pointer to "struct tomoyo_io_buffer". |
1125 | * @category: Category name. | |
9590837b | 1126 | * |
0d2171d7 | 1127 | * Returns nothing. |
9590837b | 1128 | */ |
0d2171d7 TH |
1129 | static void tomoyo_set_group(struct tomoyo_io_buffer *head, |
1130 | const char *category) | |
9590837b | 1131 | { |
bd03a3e4 TH |
1132 | if (head->type == TOMOYO_EXCEPTIONPOLICY) { |
1133 | tomoyo_print_namespace(head); | |
32997144 TH |
1134 | tomoyo_io_printf(head, "acl_group %u ", |
1135 | head->r.acl_group_index); | |
bd03a3e4 | 1136 | } |
0d2171d7 | 1137 | tomoyo_set_string(head, category); |
9590837b KT |
1138 | } |
1139 | ||
1140 | /** | |
5db5a39b | 1141 | * tomoyo_print_entry - Print an ACL entry. |
9590837b KT |
1142 | * |
1143 | * @head: Pointer to "struct tomoyo_io_buffer". | |
5db5a39b | 1144 | * @acl: Pointer to an ACL entry. |
9590837b KT |
1145 | * |
1146 | * Returns true on success, false otherwise. | |
1147 | */ | |
5db5a39b TH |
1148 | static bool tomoyo_print_entry(struct tomoyo_io_buffer *head, |
1149 | struct tomoyo_acl_info *acl) | |
9590837b | 1150 | { |
5db5a39b | 1151 | const u8 acl_type = acl->type; |
0d2171d7 | 1152 | bool first = true; |
f23571e8 | 1153 | u8 bit; |
9590837b | 1154 | |
2066a361 TH |
1155 | if (head->r.print_cond_part) |
1156 | goto print_cond_part; | |
5db5a39b TH |
1157 | if (acl->is_deleted) |
1158 | return true; | |
f23571e8 TH |
1159 | if (!tomoyo_flush(head)) |
1160 | return false; | |
1161 | else if (acl_type == TOMOYO_TYPE_PATH_ACL) { | |
5db5a39b TH |
1162 | struct tomoyo_path_acl *ptr = |
1163 | container_of(acl, typeof(*ptr), head); | |
1164 | const u16 perm = ptr->perm; | |
0d2171d7 | 1165 | for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) { |
5db5a39b TH |
1166 | if (!(perm & (1 << bit))) |
1167 | continue; | |
bd03a3e4 | 1168 | if (head->r.print_transition_related_only && |
5db5a39b TH |
1169 | bit != TOMOYO_TYPE_EXECUTE) |
1170 | continue; | |
0d2171d7 TH |
1171 | if (first) { |
1172 | tomoyo_set_group(head, "file "); | |
1173 | first = false; | |
1174 | } else { | |
1175 | tomoyo_set_slash(head); | |
1176 | } | |
1177 | tomoyo_set_string(head, tomoyo_path_keyword[bit]); | |
5db5a39b | 1178 | } |
0d2171d7 TH |
1179 | if (first) |
1180 | return true; | |
f23571e8 | 1181 | tomoyo_print_name_union(head, &ptr->name); |
bd03a3e4 | 1182 | } else if (head->r.print_transition_related_only) { |
5db5a39b TH |
1183 | return true; |
1184 | } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) { | |
1185 | struct tomoyo_path2_acl *ptr = | |
1186 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 TH |
1187 | const u8 perm = ptr->perm; |
1188 | for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) { | |
1189 | if (!(perm & (1 << bit))) | |
1190 | continue; | |
1191 | if (first) { | |
1192 | tomoyo_set_group(head, "file "); | |
1193 | first = false; | |
1194 | } else { | |
1195 | tomoyo_set_slash(head); | |
1196 | } | |
1197 | tomoyo_set_string(head, tomoyo_mac_keywords | |
1198 | [tomoyo_pp2mac[bit]]); | |
1199 | } | |
1200 | if (first) | |
1201 | return true; | |
f23571e8 TH |
1202 | tomoyo_print_name_union(head, &ptr->name1); |
1203 | tomoyo_print_name_union(head, &ptr->name2); | |
5db5a39b TH |
1204 | } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) { |
1205 | struct tomoyo_path_number_acl *ptr = | |
1206 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 TH |
1207 | const u8 perm = ptr->perm; |
1208 | for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) { | |
1209 | if (!(perm & (1 << bit))) | |
1210 | continue; | |
1211 | if (first) { | |
1212 | tomoyo_set_group(head, "file "); | |
1213 | first = false; | |
1214 | } else { | |
1215 | tomoyo_set_slash(head); | |
1216 | } | |
1217 | tomoyo_set_string(head, tomoyo_mac_keywords | |
1218 | [tomoyo_pn2mac[bit]]); | |
1219 | } | |
1220 | if (first) | |
1221 | return true; | |
f23571e8 TH |
1222 | tomoyo_print_name_union(head, &ptr->name); |
1223 | tomoyo_print_number_union(head, &ptr->number); | |
5db5a39b TH |
1224 | } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) { |
1225 | struct tomoyo_mkdev_acl *ptr = | |
1226 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 TH |
1227 | const u8 perm = ptr->perm; |
1228 | for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) { | |
1229 | if (!(perm & (1 << bit))) | |
1230 | continue; | |
1231 | if (first) { | |
1232 | tomoyo_set_group(head, "file "); | |
1233 | first = false; | |
1234 | } else { | |
1235 | tomoyo_set_slash(head); | |
1236 | } | |
1237 | tomoyo_set_string(head, tomoyo_mac_keywords | |
1238 | [tomoyo_pnnn2mac[bit]]); | |
1239 | } | |
1240 | if (first) | |
1241 | return true; | |
f23571e8 TH |
1242 | tomoyo_print_name_union(head, &ptr->name); |
1243 | tomoyo_print_number_union(head, &ptr->mode); | |
1244 | tomoyo_print_number_union(head, &ptr->major); | |
1245 | tomoyo_print_number_union(head, &ptr->minor); | |
5db5a39b TH |
1246 | } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) { |
1247 | struct tomoyo_mount_acl *ptr = | |
1248 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 | 1249 | tomoyo_set_group(head, "file mount"); |
f23571e8 TH |
1250 | tomoyo_print_name_union(head, &ptr->dev_name); |
1251 | tomoyo_print_name_union(head, &ptr->dir_name); | |
1252 | tomoyo_print_name_union(head, &ptr->fs_type); | |
1253 | tomoyo_print_number_union(head, &ptr->flags); | |
a1f9bb6a | 1254 | } |
2066a361 TH |
1255 | if (acl->cond) { |
1256 | head->r.print_cond_part = true; | |
1257 | head->r.cond_step = 0; | |
1258 | if (!tomoyo_flush(head)) | |
1259 | return false; | |
1260 | print_cond_part: | |
1261 | if (!tomoyo_print_condition(head, acl->cond)) | |
1262 | return false; | |
1263 | head->r.print_cond_part = false; | |
1264 | } else { | |
1265 | tomoyo_set_lf(head); | |
1266 | } | |
f23571e8 TH |
1267 | return true; |
1268 | } | |
1269 | ||
1270 | /** | |
1271 | * tomoyo_read_domain2 - Read domain policy. | |
1272 | * | |
32997144 TH |
1273 | * @head: Pointer to "struct tomoyo_io_buffer". |
1274 | * @list: Pointer to "struct list_head". | |
f23571e8 TH |
1275 | * |
1276 | * Caller holds tomoyo_read_lock(). | |
1277 | * | |
1278 | * Returns true on success, false otherwise. | |
1279 | */ | |
1280 | static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head, | |
32997144 | 1281 | struct list_head *list) |
f23571e8 | 1282 | { |
32997144 | 1283 | list_for_each_cookie(head->r.acl, list) { |
f23571e8 TH |
1284 | struct tomoyo_acl_info *ptr = |
1285 | list_entry(head->r.acl, typeof(*ptr), list); | |
1286 | if (!tomoyo_print_entry(head, ptr)) | |
1287 | return false; | |
1288 | } | |
1289 | head->r.acl = NULL; | |
a1f9bb6a | 1290 | return true; |
a1f9bb6a TH |
1291 | } |
1292 | ||
9590837b | 1293 | /** |
e2bf6907 | 1294 | * tomoyo_read_domain - Read domain policy. |
9590837b KT |
1295 | * |
1296 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1297 | * | |
fdb8ebb7 | 1298 | * Caller holds tomoyo_read_lock(). |
9590837b | 1299 | */ |
e2bf6907 | 1300 | static void tomoyo_read_domain(struct tomoyo_io_buffer *head) |
9590837b | 1301 | { |
f23571e8 | 1302 | if (head->r.eof) |
8fbe71f0 | 1303 | return; |
f23571e8 | 1304 | list_for_each_cookie(head->r.domain, &tomoyo_domain_list) { |
475e6fa3 | 1305 | struct tomoyo_domain_info *domain = |
f23571e8 TH |
1306 | list_entry(head->r.domain, typeof(*domain), list); |
1307 | switch (head->r.step) { | |
2c47ab93 | 1308 | u8 i; |
f23571e8 TH |
1309 | case 0: |
1310 | if (domain->is_deleted && | |
1311 | !head->r.print_this_domain_only) | |
1312 | continue; | |
1313 | /* Print domainname and flags. */ | |
1314 | tomoyo_set_string(head, domain->domainname->name); | |
1315 | tomoyo_set_lf(head); | |
b5bc60b4 | 1316 | tomoyo_io_printf(head, "use_profile %u\n", |
f23571e8 | 1317 | domain->profile); |
32997144 TH |
1318 | tomoyo_io_printf(head, "use_group %u\n", |
1319 | domain->group); | |
2c47ab93 TH |
1320 | for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++) |
1321 | if (domain->flags[i]) | |
1322 | tomoyo_set_string(head, tomoyo_dif[i]); | |
f23571e8 TH |
1323 | head->r.step++; |
1324 | tomoyo_set_lf(head); | |
1325 | /* fall through */ | |
1326 | case 1: | |
32997144 | 1327 | if (!tomoyo_read_domain2(head, &domain->acl_info_list)) |
f23571e8 TH |
1328 | return; |
1329 | head->r.step++; | |
1330 | if (!tomoyo_set_lf(head)) | |
1331 | return; | |
1332 | /* fall through */ | |
1333 | case 2: | |
1334 | head->r.step = 0; | |
1335 | if (head->r.print_this_domain_only) | |
1336 | goto done; | |
9590837b | 1337 | } |
9590837b | 1338 | } |
f23571e8 TH |
1339 | done: |
1340 | head->r.eof = true; | |
9590837b KT |
1341 | } |
1342 | ||
9590837b KT |
1343 | /** |
1344 | * tomoyo_write_pid: Specify PID to obtain domainname. | |
1345 | * | |
1346 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1347 | * | |
1348 | * Returns 0. | |
1349 | */ | |
1350 | static int tomoyo_write_pid(struct tomoyo_io_buffer *head) | |
1351 | { | |
f23571e8 | 1352 | head->r.eof = false; |
9590837b KT |
1353 | return 0; |
1354 | } | |
1355 | ||
1356 | /** | |
1357 | * tomoyo_read_pid - Get domainname of the specified PID. | |
1358 | * | |
1359 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1360 | * | |
1361 | * Returns the domainname which the specified PID is in on success, | |
1362 | * empty string otherwise. | |
1363 | * The PID is specified by tomoyo_write_pid() so that the user can obtain | |
1364 | * using read()/write() interface rather than sysctl() interface. | |
1365 | */ | |
8fbe71f0 | 1366 | static void tomoyo_read_pid(struct tomoyo_io_buffer *head) |
9590837b | 1367 | { |
f23571e8 TH |
1368 | char *buf = head->write_buf; |
1369 | bool global_pid = false; | |
1370 | unsigned int pid; | |
1371 | struct task_struct *p; | |
1372 | struct tomoyo_domain_info *domain = NULL; | |
1373 | ||
1374 | /* Accessing write_buf is safe because head->io_sem is held. */ | |
1375 | if (!buf) { | |
1376 | head->r.eof = true; | |
1377 | return; /* Do nothing if open(O_RDONLY). */ | |
9590837b | 1378 | } |
f23571e8 TH |
1379 | if (head->r.w_pos || head->r.eof) |
1380 | return; | |
1381 | head->r.eof = true; | |
1382 | if (tomoyo_str_starts(&buf, "global-pid ")) | |
1383 | global_pid = true; | |
1384 | pid = (unsigned int) simple_strtoul(buf, NULL, 10); | |
1385 | rcu_read_lock(); | |
1386 | read_lock(&tasklist_lock); | |
1387 | if (global_pid) | |
1388 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
1389 | else | |
1390 | p = find_task_by_vpid(pid); | |
1391 | if (p) | |
1392 | domain = tomoyo_real_domain(p); | |
1393 | read_unlock(&tasklist_lock); | |
1394 | rcu_read_unlock(); | |
1395 | if (!domain) | |
1396 | return; | |
1397 | tomoyo_io_printf(head, "%u %u ", pid, domain->profile); | |
1398 | tomoyo_set_string(head, domain->domainname->name); | |
9590837b KT |
1399 | } |
1400 | ||
5448ec4f | 1401 | static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = { |
bd03a3e4 TH |
1402 | [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ", |
1403 | [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ", | |
1404 | [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ", | |
1405 | [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ", | |
1406 | [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ", | |
1407 | [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ", | |
5448ec4f TH |
1408 | }; |
1409 | ||
e2bf6907 | 1410 | static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = { |
b5bc60b4 TH |
1411 | [TOMOYO_PATH_GROUP] = "path_group ", |
1412 | [TOMOYO_NUMBER_GROUP] = "number_group ", | |
e2bf6907 TH |
1413 | }; |
1414 | ||
9590837b | 1415 | /** |
e2bf6907 | 1416 | * tomoyo_write_exception - Write exception policy. |
9590837b KT |
1417 | * |
1418 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1419 | * | |
1420 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1421 | * |
1422 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1423 | */ |
e2bf6907 | 1424 | static int tomoyo_write_exception(struct tomoyo_io_buffer *head) |
9590837b | 1425 | { |
bd03a3e4 | 1426 | const bool is_delete = head->w.is_delete; |
a238cf5b | 1427 | struct tomoyo_acl_param param = { |
bd03a3e4 TH |
1428 | .ns = head->w.ns, |
1429 | .is_delete = is_delete, | |
a238cf5b | 1430 | .data = head->write_buf, |
e2bf6907 | 1431 | }; |
a238cf5b | 1432 | u8 i; |
a238cf5b TH |
1433 | if (tomoyo_str_starts(¶m.data, "aggregator ")) |
1434 | return tomoyo_write_aggregator(¶m); | |
e2bf6907 | 1435 | for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++) |
a238cf5b TH |
1436 | if (tomoyo_str_starts(¶m.data, tomoyo_transition_type[i])) |
1437 | return tomoyo_write_transition_control(¶m, i); | |
e2bf6907 | 1438 | for (i = 0; i < TOMOYO_MAX_GROUP; i++) |
a238cf5b TH |
1439 | if (tomoyo_str_starts(¶m.data, tomoyo_group_name[i])) |
1440 | return tomoyo_write_group(¶m, i); | |
32997144 TH |
1441 | if (tomoyo_str_starts(¶m.data, "acl_group ")) { |
1442 | unsigned int group; | |
1443 | char *data; | |
1444 | group = simple_strtoul(param.data, &data, 10); | |
1445 | if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ') | |
bd03a3e4 TH |
1446 | return tomoyo_write_domain2 |
1447 | (head->w.ns, &head->w.ns->acl_group[group], | |
1448 | data, is_delete); | |
32997144 | 1449 | } |
9590837b KT |
1450 | return -EINVAL; |
1451 | } | |
1452 | ||
1453 | /** | |
31845e8c | 1454 | * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group" list. |
9590837b KT |
1455 | * |
1456 | * @head: Pointer to "struct tomoyo_io_buffer". | |
31845e8c TH |
1457 | * @idx: Index number. |
1458 | * | |
1459 | * Returns true on success, false otherwise. | |
9590837b | 1460 | * |
fdb8ebb7 | 1461 | * Caller holds tomoyo_read_lock(). |
9590837b | 1462 | */ |
31845e8c | 1463 | static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx) |
9590837b | 1464 | { |
bd03a3e4 TH |
1465 | struct tomoyo_policy_namespace *ns = |
1466 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
1467 | struct list_head *list = &ns->group_list[idx]; | |
1468 | list_for_each_cookie(head->r.group, list) { | |
31845e8c | 1469 | struct tomoyo_group *group = |
0df7e8b8 | 1470 | list_entry(head->r.group, typeof(*group), head.list); |
f23571e8 | 1471 | list_for_each_cookie(head->r.acl, &group->member_list) { |
31845e8c | 1472 | struct tomoyo_acl_head *ptr = |
f23571e8 | 1473 | list_entry(head->r.acl, typeof(*ptr), list); |
31845e8c TH |
1474 | if (ptr->is_deleted) |
1475 | continue; | |
f23571e8 TH |
1476 | if (!tomoyo_flush(head)) |
1477 | return false; | |
bd03a3e4 | 1478 | tomoyo_print_namespace(head); |
f23571e8 TH |
1479 | tomoyo_set_string(head, tomoyo_group_name[idx]); |
1480 | tomoyo_set_string(head, group->group_name->name); | |
31845e8c | 1481 | if (idx == TOMOYO_PATH_GROUP) { |
f23571e8 TH |
1482 | tomoyo_set_space(head); |
1483 | tomoyo_set_string(head, container_of | |
1484 | (ptr, struct tomoyo_path_group, | |
1485 | head)->member_name->name); | |
31845e8c | 1486 | } else if (idx == TOMOYO_NUMBER_GROUP) { |
f23571e8 TH |
1487 | tomoyo_print_number_union(head, &container_of |
1488 | (ptr, | |
1489 | struct tomoyo_number_group, | |
1490 | head)->number); | |
31845e8c | 1491 | } |
f23571e8 | 1492 | tomoyo_set_lf(head); |
31845e8c | 1493 | } |
f23571e8 | 1494 | head->r.acl = NULL; |
31845e8c | 1495 | } |
f23571e8 | 1496 | head->r.group = NULL; |
31845e8c TH |
1497 | return true; |
1498 | } | |
1499 | ||
1500 | /** | |
1501 | * tomoyo_read_policy - Read "struct tomoyo_..._entry" list. | |
1502 | * | |
1503 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1504 | * @idx: Index number. | |
1505 | * | |
1506 | * Returns true on success, false otherwise. | |
1507 | * | |
1508 | * Caller holds tomoyo_read_lock(). | |
1509 | */ | |
1510 | static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx) | |
1511 | { | |
bd03a3e4 TH |
1512 | struct tomoyo_policy_namespace *ns = |
1513 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
1514 | struct list_head *list = &ns->policy_list[idx]; | |
1515 | list_for_each_cookie(head->r.acl, list) { | |
475e6fa3 | 1516 | struct tomoyo_acl_head *acl = |
f23571e8 | 1517 | container_of(head->r.acl, typeof(*acl), list); |
31845e8c TH |
1518 | if (acl->is_deleted) |
1519 | continue; | |
f23571e8 TH |
1520 | if (!tomoyo_flush(head)) |
1521 | return false; | |
31845e8c | 1522 | switch (idx) { |
5448ec4f | 1523 | case TOMOYO_ID_TRANSITION_CONTROL: |
31845e8c | 1524 | { |
5448ec4f | 1525 | struct tomoyo_transition_control *ptr = |
31845e8c | 1526 | container_of(acl, typeof(*ptr), head); |
bd03a3e4 | 1527 | tomoyo_print_namespace(head); |
0d2171d7 | 1528 | tomoyo_set_string(head, tomoyo_transition_type |
f23571e8 | 1529 | [ptr->type]); |
0d2171d7 TH |
1530 | tomoyo_set_string(head, ptr->program ? |
1531 | ptr->program->name : "any"); | |
1532 | tomoyo_set_string(head, " from "); | |
1533 | tomoyo_set_string(head, ptr->domainname ? | |
1534 | ptr->domainname->name : | |
1535 | "any"); | |
31845e8c TH |
1536 | } |
1537 | break; | |
31845e8c TH |
1538 | case TOMOYO_ID_AGGREGATOR: |
1539 | { | |
e2bf6907 | 1540 | struct tomoyo_aggregator *ptr = |
31845e8c | 1541 | container_of(acl, typeof(*ptr), head); |
bd03a3e4 | 1542 | tomoyo_print_namespace(head); |
b5bc60b4 | 1543 | tomoyo_set_string(head, "aggregator "); |
f23571e8 TH |
1544 | tomoyo_set_string(head, |
1545 | ptr->original_name->name); | |
1546 | tomoyo_set_space(head); | |
1547 | tomoyo_set_string(head, | |
1548 | ptr->aggregated_name->name); | |
31845e8c TH |
1549 | } |
1550 | break; | |
31845e8c TH |
1551 | default: |
1552 | continue; | |
9590837b | 1553 | } |
f23571e8 | 1554 | tomoyo_set_lf(head); |
9590837b | 1555 | } |
f23571e8 | 1556 | head->r.acl = NULL; |
31845e8c TH |
1557 | return true; |
1558 | } | |
1559 | ||
1560 | /** | |
e2bf6907 | 1561 | * tomoyo_read_exception - Read exception policy. |
31845e8c TH |
1562 | * |
1563 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1564 | * | |
1565 | * Caller holds tomoyo_read_lock(). | |
1566 | */ | |
e2bf6907 | 1567 | static void tomoyo_read_exception(struct tomoyo_io_buffer *head) |
31845e8c | 1568 | { |
bd03a3e4 TH |
1569 | struct tomoyo_policy_namespace *ns = |
1570 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
f23571e8 | 1571 | if (head->r.eof) |
31845e8c | 1572 | return; |
f23571e8 TH |
1573 | while (head->r.step < TOMOYO_MAX_POLICY && |
1574 | tomoyo_read_policy(head, head->r.step)) | |
1575 | head->r.step++; | |
1576 | if (head->r.step < TOMOYO_MAX_POLICY) | |
31845e8c | 1577 | return; |
f23571e8 TH |
1578 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP && |
1579 | tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY)) | |
1580 | head->r.step++; | |
1581 | if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP) | |
31845e8c | 1582 | return; |
32997144 TH |
1583 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP |
1584 | + TOMOYO_MAX_ACL_GROUPS) { | |
1585 | head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY | |
1586 | - TOMOYO_MAX_GROUP; | |
bd03a3e4 | 1587 | if (!tomoyo_read_domain2(head, &ns->acl_group |
32997144 TH |
1588 | [head->r.acl_group_index])) |
1589 | return; | |
1590 | head->r.step++; | |
1591 | } | |
f23571e8 | 1592 | head->r.eof = true; |
9590837b KT |
1593 | } |
1594 | ||
eadd99cc | 1595 | /* Wait queue for kernel -> userspace notification. */ |
17fcfbd9 | 1596 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait); |
eadd99cc TH |
1597 | /* Wait queue for userspace -> kernel notification. */ |
1598 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait); | |
17fcfbd9 TH |
1599 | |
1600 | /* Structure for query. */ | |
e2bf6907 | 1601 | struct tomoyo_query { |
17fcfbd9 TH |
1602 | struct list_head list; |
1603 | char *query; | |
eadd99cc | 1604 | size_t query_len; |
17fcfbd9 | 1605 | unsigned int serial; |
eadd99cc TH |
1606 | u8 timer; |
1607 | u8 answer; | |
1608 | u8 retry; | |
17fcfbd9 TH |
1609 | }; |
1610 | ||
e2bf6907 | 1611 | /* The list for "struct tomoyo_query". */ |
17fcfbd9 TH |
1612 | static LIST_HEAD(tomoyo_query_list); |
1613 | ||
eadd99cc TH |
1614 | /* Lock for manipulating tomoyo_query_list. */ |
1615 | static DEFINE_SPINLOCK(tomoyo_query_list_lock); | |
1616 | ||
17fcfbd9 TH |
1617 | /* |
1618 | * Number of "struct file" referring /sys/kernel/security/tomoyo/query | |
1619 | * interface. | |
1620 | */ | |
1621 | static atomic_t tomoyo_query_observers = ATOMIC_INIT(0); | |
1622 | ||
eadd99cc TH |
1623 | /** |
1624 | * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode. | |
1625 | * | |
1626 | * @domain: Pointer to "struct tomoyo_domain_info". | |
1627 | * @header: Lines containing ACL. | |
1628 | * | |
1629 | * Returns nothing. | |
1630 | */ | |
1631 | static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header) | |
1632 | { | |
1633 | char *buffer; | |
1634 | char *cp = strchr(header, '\n'); | |
1635 | int len; | |
1636 | if (!cp) | |
1637 | return; | |
1638 | cp = strchr(cp + 1, '\n'); | |
1639 | if (!cp) | |
1640 | return; | |
1641 | *cp++ = '\0'; | |
1642 | len = strlen(cp) + 1; | |
1643 | buffer = kmalloc(len, GFP_NOFS); | |
1644 | if (!buffer) | |
1645 | return; | |
1646 | snprintf(buffer, len - 1, "%s", cp); | |
1647 | tomoyo_normalize_line(buffer); | |
b22b8b9f TH |
1648 | if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer, |
1649 | false)) | |
1650 | tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES); | |
eadd99cc TH |
1651 | kfree(buffer); |
1652 | } | |
1653 | ||
17fcfbd9 TH |
1654 | /** |
1655 | * tomoyo_supervisor - Ask for the supervisor's decision. | |
1656 | * | |
eadd99cc TH |
1657 | * @r: Pointer to "struct tomoyo_request_info". |
1658 | * @fmt: The printf()'s format string, followed by parameters. | |
17fcfbd9 TH |
1659 | * |
1660 | * Returns 0 if the supervisor decided to permit the access request which | |
1661 | * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the | |
1662 | * supervisor decided to retry the access request which violated the policy in | |
1663 | * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise. | |
1664 | */ | |
1665 | int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...) | |
1666 | { | |
1667 | va_list args; | |
eadd99cc | 1668 | int error; |
17fcfbd9 TH |
1669 | int len; |
1670 | static unsigned int tomoyo_serial; | |
eadd99cc | 1671 | struct tomoyo_query entry = { }; |
17fcfbd9 | 1672 | bool quota_exceeded = false; |
eadd99cc TH |
1673 | va_start(args, fmt); |
1674 | len = vsnprintf((char *) &len, 1, fmt, args) + 1; | |
1675 | va_end(args); | |
1676 | /* Write /sys/kernel/security/tomoyo/audit. */ | |
1677 | va_start(args, fmt); | |
1678 | tomoyo_write_log2(r, len, fmt, args); | |
1679 | va_end(args); | |
1680 | /* Nothing more to do if granted. */ | |
1681 | if (r->granted) | |
1682 | return 0; | |
b22b8b9f TH |
1683 | if (r->mode) |
1684 | tomoyo_update_stat(r->mode); | |
17fcfbd9 | 1685 | switch (r->mode) { |
eadd99cc TH |
1686 | case TOMOYO_CONFIG_ENFORCING: |
1687 | error = -EPERM; | |
1688 | if (atomic_read(&tomoyo_query_observers)) | |
1689 | break; | |
1690 | goto out; | |
17fcfbd9 | 1691 | case TOMOYO_CONFIG_LEARNING: |
eadd99cc TH |
1692 | error = 0; |
1693 | /* Check max_learning_entry parameter. */ | |
1694 | if (tomoyo_domain_quota_is_ok(r)) | |
1695 | break; | |
17fcfbd9 | 1696 | /* fall through */ |
eadd99cc | 1697 | default: |
17fcfbd9 TH |
1698 | return 0; |
1699 | } | |
eadd99cc | 1700 | /* Get message. */ |
17fcfbd9 | 1701 | va_start(args, fmt); |
eadd99cc | 1702 | entry.query = tomoyo_init_log(r, len, fmt, args); |
17fcfbd9 | 1703 | va_end(args); |
eadd99cc | 1704 | if (!entry.query) |
17fcfbd9 | 1705 | goto out; |
eadd99cc TH |
1706 | entry.query_len = strlen(entry.query) + 1; |
1707 | if (!error) { | |
1708 | tomoyo_add_entry(r->domain, entry.query); | |
17fcfbd9 | 1709 | goto out; |
eadd99cc TH |
1710 | } |
1711 | len = tomoyo_round2(entry.query_len); | |
17fcfbd9 | 1712 | spin_lock(&tomoyo_query_list_lock); |
eadd99cc TH |
1713 | if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] && |
1714 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len | |
1715 | >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) { | |
17fcfbd9 TH |
1716 | quota_exceeded = true; |
1717 | } else { | |
eadd99cc TH |
1718 | entry.serial = tomoyo_serial++; |
1719 | entry.retry = r->retry; | |
1720 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len; | |
1721 | list_add_tail(&entry.list, &tomoyo_query_list); | |
17fcfbd9 TH |
1722 | } |
1723 | spin_unlock(&tomoyo_query_list_lock); | |
1724 | if (quota_exceeded) | |
1725 | goto out; | |
17fcfbd9 | 1726 | /* Give 10 seconds for supervisor's opinion. */ |
eadd99cc TH |
1727 | while (entry.timer < 10) { |
1728 | wake_up_all(&tomoyo_query_wait); | |
1729 | if (wait_event_interruptible_timeout | |
1730 | (tomoyo_answer_wait, entry.answer || | |
1731 | !atomic_read(&tomoyo_query_observers), HZ)) | |
17fcfbd9 | 1732 | break; |
eadd99cc TH |
1733 | else |
1734 | entry.timer++; | |
17fcfbd9 TH |
1735 | } |
1736 | spin_lock(&tomoyo_query_list_lock); | |
eadd99cc TH |
1737 | list_del(&entry.list); |
1738 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len; | |
17fcfbd9 | 1739 | spin_unlock(&tomoyo_query_list_lock); |
eadd99cc | 1740 | switch (entry.answer) { |
17fcfbd9 TH |
1741 | case 3: /* Asked to retry by administrator. */ |
1742 | error = TOMOYO_RETRY_REQUEST; | |
1743 | r->retry++; | |
1744 | break; | |
1745 | case 1: | |
1746 | /* Granted by administrator. */ | |
1747 | error = 0; | |
1748 | break; | |
17fcfbd9 | 1749 | default: |
eadd99cc | 1750 | /* Timed out or rejected by administrator. */ |
17fcfbd9 TH |
1751 | break; |
1752 | } | |
eadd99cc TH |
1753 | out: |
1754 | kfree(entry.query); | |
17fcfbd9 TH |
1755 | return error; |
1756 | } | |
1757 | ||
1758 | /** | |
1759 | * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query. | |
1760 | * | |
1761 | * @file: Pointer to "struct file". | |
1762 | * @wait: Pointer to "poll_table". | |
1763 | * | |
1764 | * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise. | |
1765 | * | |
1766 | * Waits for access requests which violated policy in enforcing mode. | |
1767 | */ | |
1768 | static int tomoyo_poll_query(struct file *file, poll_table *wait) | |
1769 | { | |
1770 | struct list_head *tmp; | |
1771 | bool found = false; | |
1772 | u8 i; | |
1773 | for (i = 0; i < 2; i++) { | |
1774 | spin_lock(&tomoyo_query_list_lock); | |
1775 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 TH |
1776 | struct tomoyo_query *ptr = |
1777 | list_entry(tmp, typeof(*ptr), list); | |
17fcfbd9 TH |
1778 | if (ptr->answer) |
1779 | continue; | |
1780 | found = true; | |
1781 | break; | |
1782 | } | |
1783 | spin_unlock(&tomoyo_query_list_lock); | |
1784 | if (found) | |
1785 | return POLLIN | POLLRDNORM; | |
1786 | if (i) | |
1787 | break; | |
1788 | poll_wait(file, &tomoyo_query_wait, wait); | |
1789 | } | |
1790 | return 0; | |
1791 | } | |
1792 | ||
1793 | /** | |
1794 | * tomoyo_read_query - Read access requests which violated policy in enforcing mode. | |
1795 | * | |
1796 | * @head: Pointer to "struct tomoyo_io_buffer". | |
17fcfbd9 | 1797 | */ |
8fbe71f0 | 1798 | static void tomoyo_read_query(struct tomoyo_io_buffer *head) |
17fcfbd9 TH |
1799 | { |
1800 | struct list_head *tmp; | |
2c47ab93 TH |
1801 | unsigned int pos = 0; |
1802 | size_t len = 0; | |
17fcfbd9 | 1803 | char *buf; |
f23571e8 | 1804 | if (head->r.w_pos) |
8fbe71f0 | 1805 | return; |
17fcfbd9 TH |
1806 | if (head->read_buf) { |
1807 | kfree(head->read_buf); | |
1808 | head->read_buf = NULL; | |
17fcfbd9 TH |
1809 | } |
1810 | spin_lock(&tomoyo_query_list_lock); | |
1811 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 1812 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
17fcfbd9 TH |
1813 | if (ptr->answer) |
1814 | continue; | |
f23571e8 | 1815 | if (pos++ != head->r.query_index) |
17fcfbd9 TH |
1816 | continue; |
1817 | len = ptr->query_len; | |
1818 | break; | |
1819 | } | |
1820 | spin_unlock(&tomoyo_query_list_lock); | |
1821 | if (!len) { | |
f23571e8 | 1822 | head->r.query_index = 0; |
8fbe71f0 | 1823 | return; |
17fcfbd9 | 1824 | } |
eadd99cc | 1825 | buf = kzalloc(len + 32, GFP_NOFS); |
17fcfbd9 | 1826 | if (!buf) |
8fbe71f0 | 1827 | return; |
17fcfbd9 TH |
1828 | pos = 0; |
1829 | spin_lock(&tomoyo_query_list_lock); | |
1830 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 1831 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
17fcfbd9 TH |
1832 | if (ptr->answer) |
1833 | continue; | |
f23571e8 | 1834 | if (pos++ != head->r.query_index) |
17fcfbd9 TH |
1835 | continue; |
1836 | /* | |
1837 | * Some query can be skipped because tomoyo_query_list | |
1838 | * can change, but I don't care. | |
1839 | */ | |
1840 | if (len == ptr->query_len) | |
eadd99cc TH |
1841 | snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial, |
1842 | ptr->retry, ptr->query); | |
17fcfbd9 TH |
1843 | break; |
1844 | } | |
1845 | spin_unlock(&tomoyo_query_list_lock); | |
1846 | if (buf[0]) { | |
17fcfbd9 | 1847 | head->read_buf = buf; |
f23571e8 TH |
1848 | head->r.w[head->r.w_pos++] = buf; |
1849 | head->r.query_index++; | |
17fcfbd9 TH |
1850 | } else { |
1851 | kfree(buf); | |
1852 | } | |
17fcfbd9 TH |
1853 | } |
1854 | ||
1855 | /** | |
1856 | * tomoyo_write_answer - Write the supervisor's decision. | |
1857 | * | |
1858 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1859 | * | |
1860 | * Returns 0 on success, -EINVAL otherwise. | |
1861 | */ | |
1862 | static int tomoyo_write_answer(struct tomoyo_io_buffer *head) | |
1863 | { | |
1864 | char *data = head->write_buf; | |
1865 | struct list_head *tmp; | |
1866 | unsigned int serial; | |
1867 | unsigned int answer; | |
1868 | spin_lock(&tomoyo_query_list_lock); | |
1869 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 1870 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
17fcfbd9 TH |
1871 | ptr->timer = 0; |
1872 | } | |
1873 | spin_unlock(&tomoyo_query_list_lock); | |
1874 | if (sscanf(data, "A%u=%u", &serial, &answer) != 2) | |
1875 | return -EINVAL; | |
1876 | spin_lock(&tomoyo_query_list_lock); | |
1877 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 1878 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
17fcfbd9 TH |
1879 | if (ptr->serial != serial) |
1880 | continue; | |
1881 | if (!ptr->answer) | |
1882 | ptr->answer = answer; | |
1883 | break; | |
1884 | } | |
1885 | spin_unlock(&tomoyo_query_list_lock); | |
1886 | return 0; | |
1887 | } | |
1888 | ||
9590837b KT |
1889 | /** |
1890 | * tomoyo_read_version: Get version. | |
1891 | * | |
1892 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1893 | * | |
1894 | * Returns version information. | |
1895 | */ | |
8fbe71f0 | 1896 | static void tomoyo_read_version(struct tomoyo_io_buffer *head) |
9590837b | 1897 | { |
f23571e8 | 1898 | if (!head->r.eof) { |
d5ca1725 | 1899 | tomoyo_io_printf(head, "2.4.0"); |
f23571e8 | 1900 | head->r.eof = true; |
9590837b | 1901 | } |
9590837b KT |
1902 | } |
1903 | ||
1904 | /** | |
1905 | * tomoyo_read_self_domain - Get the current process's domainname. | |
1906 | * | |
1907 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1908 | * | |
1909 | * Returns the current process's domainname. | |
1910 | */ | |
8fbe71f0 | 1911 | static void tomoyo_read_self_domain(struct tomoyo_io_buffer *head) |
9590837b | 1912 | { |
f23571e8 | 1913 | if (!head->r.eof) { |
9590837b KT |
1914 | /* |
1915 | * tomoyo_domain()->domainname != NULL | |
1916 | * because every process belongs to a domain and | |
1917 | * the domain's name cannot be NULL. | |
1918 | */ | |
1919 | tomoyo_io_printf(head, "%s", tomoyo_domain()->domainname->name); | |
f23571e8 | 1920 | head->r.eof = true; |
9590837b | 1921 | } |
9590837b KT |
1922 | } |
1923 | ||
b22b8b9f TH |
1924 | /* String table for /sys/kernel/security/tomoyo/stat interface. */ |
1925 | static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = { | |
1926 | [TOMOYO_STAT_POLICY_UPDATES] = "update:", | |
1927 | [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:", | |
1928 | [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:", | |
1929 | [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:", | |
1930 | }; | |
1931 | ||
1932 | /* String table for /sys/kernel/security/tomoyo/stat interface. */ | |
1933 | static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = { | |
1934 | [TOMOYO_MEMORY_POLICY] = "policy:", | |
1935 | [TOMOYO_MEMORY_AUDIT] = "audit log:", | |
1936 | [TOMOYO_MEMORY_QUERY] = "query message:", | |
1937 | }; | |
1938 | ||
1939 | /* Timestamp counter for last updated. */ | |
1940 | static unsigned int tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT]; | |
1941 | /* Counter for number of updates. */ | |
1942 | static unsigned int tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT]; | |
1943 | ||
1944 | /** | |
1945 | * tomoyo_update_stat - Update statistic counters. | |
1946 | * | |
1947 | * @index: Index for policy type. | |
1948 | * | |
1949 | * Returns nothing. | |
1950 | */ | |
1951 | void tomoyo_update_stat(const u8 index) | |
1952 | { | |
1953 | struct timeval tv; | |
1954 | do_gettimeofday(&tv); | |
1955 | /* | |
1956 | * I don't use atomic operations because race condition is not fatal. | |
1957 | */ | |
1958 | tomoyo_stat_updated[index]++; | |
1959 | tomoyo_stat_modified[index] = tv.tv_sec; | |
1960 | } | |
1961 | ||
1962 | /** | |
1963 | * tomoyo_read_stat - Read statistic data. | |
1964 | * | |
1965 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1966 | * | |
1967 | * Returns nothing. | |
1968 | */ | |
1969 | static void tomoyo_read_stat(struct tomoyo_io_buffer *head) | |
1970 | { | |
1971 | u8 i; | |
1972 | unsigned int total = 0; | |
1973 | if (head->r.eof) | |
1974 | return; | |
1975 | for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) { | |
1976 | tomoyo_io_printf(head, "Policy %-30s %10u", | |
1977 | tomoyo_policy_headers[i], | |
1978 | tomoyo_stat_updated[i]); | |
1979 | if (tomoyo_stat_modified[i]) { | |
1980 | struct tomoyo_time stamp; | |
1981 | tomoyo_convert_time(tomoyo_stat_modified[i], &stamp); | |
1982 | tomoyo_io_printf(head, " (Last: %04u/%02u/%02u " | |
1983 | "%02u:%02u:%02u)", | |
1984 | stamp.year, stamp.month, stamp.day, | |
1985 | stamp.hour, stamp.min, stamp.sec); | |
1986 | } | |
1987 | tomoyo_set_lf(head); | |
1988 | } | |
1989 | for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) { | |
1990 | unsigned int used = tomoyo_memory_used[i]; | |
1991 | total += used; | |
1992 | tomoyo_io_printf(head, "Memory used by %-22s %10u", | |
1993 | tomoyo_memory_headers[i], used); | |
1994 | used = tomoyo_memory_quota[i]; | |
1995 | if (used) | |
1996 | tomoyo_io_printf(head, " (Quota: %10u)", used); | |
1997 | tomoyo_set_lf(head); | |
1998 | } | |
1999 | tomoyo_io_printf(head, "Total memory used: %10u\n", | |
2000 | total); | |
2001 | head->r.eof = true; | |
2002 | } | |
2003 | ||
2004 | /** | |
2005 | * tomoyo_write_stat - Set memory quota. | |
2006 | * | |
2007 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2008 | * | |
2009 | * Returns 0. | |
2010 | */ | |
2011 | static int tomoyo_write_stat(struct tomoyo_io_buffer *head) | |
2012 | { | |
2013 | char *data = head->write_buf; | |
2014 | u8 i; | |
2015 | if (tomoyo_str_starts(&data, "Memory used by ")) | |
2016 | for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) | |
2017 | if (tomoyo_str_starts(&data, tomoyo_memory_headers[i])) | |
2018 | sscanf(data, "%u", &tomoyo_memory_quota[i]); | |
2019 | return 0; | |
2020 | } | |
2021 | ||
9590837b KT |
2022 | /** |
2023 | * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface. | |
2024 | * | |
2025 | * @type: Type of interface. | |
2026 | * @file: Pointer to "struct file". | |
2027 | * | |
2e503bbb | 2028 | * Returns 0 on success, negative value otherwise. |
9590837b | 2029 | */ |
c3ef1500 | 2030 | int tomoyo_open_control(const u8 type, struct file *file) |
9590837b | 2031 | { |
4e5d6f7e | 2032 | struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS); |
9590837b KT |
2033 | |
2034 | if (!head) | |
2035 | return -ENOMEM; | |
2036 | mutex_init(&head->io_sem); | |
17fcfbd9 | 2037 | head->type = type; |
9590837b KT |
2038 | switch (type) { |
2039 | case TOMOYO_DOMAINPOLICY: | |
2040 | /* /sys/kernel/security/tomoyo/domain_policy */ | |
e2bf6907 TH |
2041 | head->write = tomoyo_write_domain; |
2042 | head->read = tomoyo_read_domain; | |
9590837b KT |
2043 | break; |
2044 | case TOMOYO_EXCEPTIONPOLICY: | |
2045 | /* /sys/kernel/security/tomoyo/exception_policy */ | |
e2bf6907 TH |
2046 | head->write = tomoyo_write_exception; |
2047 | head->read = tomoyo_read_exception; | |
9590837b | 2048 | break; |
eadd99cc TH |
2049 | case TOMOYO_AUDIT: |
2050 | /* /sys/kernel/security/tomoyo/audit */ | |
2051 | head->poll = tomoyo_poll_log; | |
2052 | head->read = tomoyo_read_log; | |
2053 | break; | |
9590837b KT |
2054 | case TOMOYO_SELFDOMAIN: |
2055 | /* /sys/kernel/security/tomoyo/self_domain */ | |
2056 | head->read = tomoyo_read_self_domain; | |
2057 | break; | |
9590837b KT |
2058 | case TOMOYO_PROCESS_STATUS: |
2059 | /* /sys/kernel/security/tomoyo/.process_status */ | |
2060 | head->write = tomoyo_write_pid; | |
2061 | head->read = tomoyo_read_pid; | |
2062 | break; | |
2063 | case TOMOYO_VERSION: | |
2064 | /* /sys/kernel/security/tomoyo/version */ | |
2065 | head->read = tomoyo_read_version; | |
2066 | head->readbuf_size = 128; | |
2067 | break; | |
b22b8b9f TH |
2068 | case TOMOYO_STAT: |
2069 | /* /sys/kernel/security/tomoyo/stat */ | |
2070 | head->write = tomoyo_write_stat; | |
2071 | head->read = tomoyo_read_stat; | |
2072 | head->readbuf_size = 1024; | |
9590837b KT |
2073 | break; |
2074 | case TOMOYO_PROFILE: | |
2075 | /* /sys/kernel/security/tomoyo/profile */ | |
2076 | head->write = tomoyo_write_profile; | |
2077 | head->read = tomoyo_read_profile; | |
2078 | break; | |
17fcfbd9 TH |
2079 | case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */ |
2080 | head->poll = tomoyo_poll_query; | |
2081 | head->write = tomoyo_write_answer; | |
2082 | head->read = tomoyo_read_query; | |
2083 | break; | |
9590837b KT |
2084 | case TOMOYO_MANAGER: |
2085 | /* /sys/kernel/security/tomoyo/manager */ | |
e2bf6907 TH |
2086 | head->write = tomoyo_write_manager; |
2087 | head->read = tomoyo_read_manager; | |
9590837b KT |
2088 | break; |
2089 | } | |
2090 | if (!(file->f_mode & FMODE_READ)) { | |
2091 | /* | |
2092 | * No need to allocate read_buf since it is not opened | |
2093 | * for reading. | |
2094 | */ | |
2095 | head->read = NULL; | |
17fcfbd9 TH |
2096 | head->poll = NULL; |
2097 | } else if (!head->poll) { | |
2098 | /* Don't allocate read_buf for poll() access. */ | |
9590837b KT |
2099 | if (!head->readbuf_size) |
2100 | head->readbuf_size = 4096 * 2; | |
4e5d6f7e | 2101 | head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS); |
9590837b | 2102 | if (!head->read_buf) { |
8e2d39a1 | 2103 | kfree(head); |
9590837b KT |
2104 | return -ENOMEM; |
2105 | } | |
2106 | } | |
2107 | if (!(file->f_mode & FMODE_WRITE)) { | |
2108 | /* | |
2109 | * No need to allocate write_buf since it is not opened | |
2110 | * for writing. | |
2111 | */ | |
2112 | head->write = NULL; | |
2113 | } else if (head->write) { | |
2114 | head->writebuf_size = 4096 * 2; | |
4e5d6f7e | 2115 | head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS); |
9590837b | 2116 | if (!head->write_buf) { |
8e2d39a1 TH |
2117 | kfree(head->read_buf); |
2118 | kfree(head); | |
9590837b KT |
2119 | return -ENOMEM; |
2120 | } | |
2121 | } | |
17fcfbd9 TH |
2122 | /* |
2123 | * If the file is /sys/kernel/security/tomoyo/query , increment the | |
2124 | * observer counter. | |
2125 | * The obserber counter is used by tomoyo_supervisor() to see if | |
2126 | * there is some process monitoring /sys/kernel/security/tomoyo/query. | |
2127 | */ | |
7c75964f | 2128 | if (type == TOMOYO_QUERY) |
17fcfbd9 | 2129 | atomic_inc(&tomoyo_query_observers); |
2e503bbb TH |
2130 | file->private_data = head; |
2131 | tomoyo_notify_gc(head, true); | |
9590837b KT |
2132 | return 0; |
2133 | } | |
2134 | ||
0849e3ba TH |
2135 | /** |
2136 | * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface. | |
2137 | * | |
2138 | * @file: Pointer to "struct file". | |
2139 | * @wait: Pointer to "poll_table". | |
2140 | * | |
2141 | * Waits for read readiness. | |
eadd99cc TH |
2142 | * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd and |
2143 | * /sys/kernel/security/tomoyo/audit is handled by /usr/sbin/tomoyo-auditd. | |
0849e3ba TH |
2144 | */ |
2145 | int tomoyo_poll_control(struct file *file, poll_table *wait) | |
2146 | { | |
2147 | struct tomoyo_io_buffer *head = file->private_data; | |
2148 | if (!head->poll) | |
2149 | return -ENOSYS; | |
2150 | return head->poll(file, wait); | |
2151 | } | |
2152 | ||
bd03a3e4 TH |
2153 | /** |
2154 | * tomoyo_set_namespace_cursor - Set namespace to read. | |
2155 | * | |
2156 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2157 | * | |
2158 | * Returns nothing. | |
2159 | */ | |
2160 | static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head) | |
2161 | { | |
2162 | struct list_head *ns; | |
2163 | if (head->type != TOMOYO_EXCEPTIONPOLICY && | |
2164 | head->type != TOMOYO_PROFILE) | |
2165 | return; | |
2166 | /* | |
2167 | * If this is the first read, or reading previous namespace finished | |
2168 | * and has more namespaces to read, update the namespace cursor. | |
2169 | */ | |
2170 | ns = head->r.ns; | |
2171 | if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) { | |
2172 | /* Clearing is OK because tomoyo_flush() returned true. */ | |
2173 | memset(&head->r, 0, sizeof(head->r)); | |
2174 | head->r.ns = ns ? ns->next : tomoyo_namespace_list.next; | |
2175 | } | |
2176 | } | |
2177 | ||
2178 | /** | |
2179 | * tomoyo_has_more_namespace - Check for unread namespaces. | |
2180 | * | |
2181 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2182 | * | |
2183 | * Returns true if we have more entries to print, false otherwise. | |
2184 | */ | |
2185 | static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head) | |
2186 | { | |
2187 | return (head->type == TOMOYO_EXCEPTIONPOLICY || | |
2188 | head->type == TOMOYO_PROFILE) && head->r.eof && | |
2189 | head->r.ns->next != &tomoyo_namespace_list; | |
2190 | } | |
2191 | ||
9590837b KT |
2192 | /** |
2193 | * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface. | |
2194 | * | |
0df7e8b8 | 2195 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b KT |
2196 | * @buffer: Poiner to buffer to write to. |
2197 | * @buffer_len: Size of @buffer. | |
2198 | * | |
2199 | * Returns bytes read on success, negative value otherwise. | |
2200 | */ | |
2c47ab93 TH |
2201 | ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer, |
2202 | const int buffer_len) | |
9590837b | 2203 | { |
f23571e8 | 2204 | int len; |
2e503bbb | 2205 | int idx; |
9590837b KT |
2206 | |
2207 | if (!head->read) | |
2208 | return -ENOSYS; | |
2209 | if (mutex_lock_interruptible(&head->io_sem)) | |
2210 | return -EINTR; | |
f23571e8 TH |
2211 | head->read_user_buf = buffer; |
2212 | head->read_user_buf_avail = buffer_len; | |
2e503bbb | 2213 | idx = tomoyo_read_lock(); |
f23571e8 TH |
2214 | if (tomoyo_flush(head)) |
2215 | /* Call the policy handler. */ | |
bd03a3e4 TH |
2216 | do { |
2217 | tomoyo_set_namespace_cursor(head); | |
2218 | head->read(head); | |
2219 | } while (tomoyo_flush(head) && | |
2220 | tomoyo_has_more_namespace(head)); | |
2e503bbb | 2221 | tomoyo_read_unlock(idx); |
f23571e8 | 2222 | len = head->read_user_buf - buffer; |
9590837b KT |
2223 | mutex_unlock(&head->io_sem); |
2224 | return len; | |
2225 | } | |
2226 | ||
bd03a3e4 TH |
2227 | /** |
2228 | * tomoyo_parse_policy - Parse a policy line. | |
2229 | * | |
2230 | * @head: Poiter to "struct tomoyo_io_buffer". | |
2231 | * @line: Line to parse. | |
2232 | * | |
2233 | * Returns 0 on success, negative value otherwise. | |
2234 | * | |
2235 | * Caller holds tomoyo_read_lock(). | |
2236 | */ | |
2237 | static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line) | |
2238 | { | |
2239 | /* Delete request? */ | |
2240 | head->w.is_delete = !strncmp(line, "delete ", 7); | |
2241 | if (head->w.is_delete) | |
2242 | memmove(line, line + 7, strlen(line + 7) + 1); | |
2243 | /* Selecting namespace to update. */ | |
2244 | if (head->type == TOMOYO_EXCEPTIONPOLICY || | |
2245 | head->type == TOMOYO_PROFILE) { | |
2246 | if (*line == '<') { | |
2247 | char *cp = strchr(line, ' '); | |
2248 | if (cp) { | |
2249 | *cp++ = '\0'; | |
2250 | head->w.ns = tomoyo_assign_namespace(line); | |
2251 | memmove(line, cp, strlen(cp) + 1); | |
2252 | } else | |
2253 | head->w.ns = NULL; | |
2254 | } else | |
2255 | head->w.ns = &tomoyo_kernel_namespace; | |
2256 | /* Don't allow updating if namespace is invalid. */ | |
2257 | if (!head->w.ns) | |
2258 | return -ENOENT; | |
2259 | } | |
2260 | /* Do the update. */ | |
2261 | return head->write(head); | |
2262 | } | |
2263 | ||
9590837b KT |
2264 | /** |
2265 | * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface. | |
2266 | * | |
0df7e8b8 | 2267 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b KT |
2268 | * @buffer: Pointer to buffer to read from. |
2269 | * @buffer_len: Size of @buffer. | |
2270 | * | |
2271 | * Returns @buffer_len on success, negative value otherwise. | |
2272 | */ | |
2c47ab93 TH |
2273 | ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head, |
2274 | const char __user *buffer, const int buffer_len) | |
9590837b | 2275 | { |
9590837b | 2276 | int error = buffer_len; |
bd03a3e4 | 2277 | size_t avail_len = buffer_len; |
9590837b | 2278 | char *cp0 = head->write_buf; |
2e503bbb | 2279 | int idx; |
9590837b KT |
2280 | if (!head->write) |
2281 | return -ENOSYS; | |
2282 | if (!access_ok(VERIFY_READ, buffer, buffer_len)) | |
2283 | return -EFAULT; | |
9590837b KT |
2284 | if (mutex_lock_interruptible(&head->io_sem)) |
2285 | return -EINTR; | |
2e503bbb | 2286 | idx = tomoyo_read_lock(); |
9590837b KT |
2287 | /* Read a line and dispatch it to the policy handler. */ |
2288 | while (avail_len > 0) { | |
2289 | char c; | |
0df7e8b8 | 2290 | if (head->w.avail >= head->writebuf_size - 1) { |
bd03a3e4 TH |
2291 | const int len = head->writebuf_size * 2; |
2292 | char *cp = kzalloc(len, GFP_NOFS); | |
2293 | if (!cp) { | |
2294 | error = -ENOMEM; | |
2295 | break; | |
2296 | } | |
2297 | memmove(cp, cp0, head->w.avail); | |
2298 | kfree(cp0); | |
2299 | head->write_buf = cp; | |
2300 | cp0 = cp; | |
2301 | head->writebuf_size = len; | |
2302 | } | |
2303 | if (get_user(c, buffer)) { | |
9590837b KT |
2304 | error = -EFAULT; |
2305 | break; | |
2306 | } | |
2307 | buffer++; | |
2308 | avail_len--; | |
0df7e8b8 | 2309 | cp0[head->w.avail++] = c; |
9590837b KT |
2310 | if (c != '\n') |
2311 | continue; | |
0df7e8b8 TH |
2312 | cp0[head->w.avail - 1] = '\0'; |
2313 | head->w.avail = 0; | |
9590837b | 2314 | tomoyo_normalize_line(cp0); |
bd03a3e4 TH |
2315 | if (!strcmp(cp0, "reset")) { |
2316 | head->w.ns = &tomoyo_kernel_namespace; | |
2317 | head->w.domain = NULL; | |
2318 | memset(&head->r, 0, sizeof(head->r)); | |
2319 | continue; | |
2320 | } | |
2321 | /* Don't allow updating policies by non manager programs. */ | |
2322 | switch (head->type) { | |
2323 | case TOMOYO_PROCESS_STATUS: | |
2324 | /* This does not write anything. */ | |
2325 | break; | |
2326 | case TOMOYO_DOMAINPOLICY: | |
2327 | if (tomoyo_select_domain(head, cp0)) | |
2328 | continue; | |
2329 | /* fall through */ | |
2330 | case TOMOYO_EXCEPTIONPOLICY: | |
2331 | if (!strcmp(cp0, "select transition_only")) { | |
2332 | head->r.print_transition_related_only = true; | |
2333 | continue; | |
2334 | } | |
2335 | /* fall through */ | |
2336 | default: | |
2337 | if (!tomoyo_manager()) { | |
2338 | error = -EPERM; | |
2339 | goto out; | |
2340 | } | |
2341 | } | |
2342 | switch (tomoyo_parse_policy(head, cp0)) { | |
2343 | case -EPERM: | |
2344 | error = -EPERM; | |
2345 | goto out; | |
b22b8b9f TH |
2346 | case 0: |
2347 | switch (head->type) { | |
2348 | case TOMOYO_DOMAINPOLICY: | |
2349 | case TOMOYO_EXCEPTIONPOLICY: | |
b22b8b9f TH |
2350 | case TOMOYO_STAT: |
2351 | case TOMOYO_PROFILE: | |
2352 | case TOMOYO_MANAGER: | |
2353 | tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES); | |
2354 | break; | |
2355 | default: | |
2356 | break; | |
2357 | } | |
2358 | break; | |
bd03a3e4 | 2359 | } |
9590837b | 2360 | } |
bd03a3e4 | 2361 | out: |
2e503bbb | 2362 | tomoyo_read_unlock(idx); |
9590837b KT |
2363 | mutex_unlock(&head->io_sem); |
2364 | return error; | |
2365 | } | |
2366 | ||
2367 | /** | |
2368 | * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface. | |
2369 | * | |
0df7e8b8 | 2370 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b | 2371 | * |
2e503bbb | 2372 | * Returns 0. |
9590837b | 2373 | */ |
0df7e8b8 | 2374 | int tomoyo_close_control(struct tomoyo_io_buffer *head) |
9590837b | 2375 | { |
17fcfbd9 TH |
2376 | /* |
2377 | * If the file is /sys/kernel/security/tomoyo/query , decrement the | |
2378 | * observer counter. | |
2379 | */ | |
2e503bbb TH |
2380 | if (head->type == TOMOYO_QUERY && |
2381 | atomic_dec_and_test(&tomoyo_query_observers)) | |
2382 | wake_up_all(&tomoyo_answer_wait); | |
2383 | tomoyo_notify_gc(head, false); | |
9590837b KT |
2384 | return 0; |
2385 | } | |
2386 | ||
9590837b | 2387 | /** |
c3ef1500 | 2388 | * tomoyo_check_profile - Check all profiles currently assigned to domains are defined. |
9590837b | 2389 | */ |
c3ef1500 | 2390 | void tomoyo_check_profile(void) |
9590837b | 2391 | { |
c3ef1500 TH |
2392 | struct tomoyo_domain_info *domain; |
2393 | const int idx = tomoyo_read_lock(); | |
2394 | tomoyo_policy_loaded = true; | |
bd03a3e4 | 2395 | printk(KERN_INFO "TOMOYO: 2.4.0\n"); |
c3ef1500 TH |
2396 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
2397 | const u8 profile = domain->profile; | |
bd03a3e4 TH |
2398 | const struct tomoyo_policy_namespace *ns = domain->ns; |
2399 | if (ns->profile_version != 20100903) | |
2400 | printk(KERN_ERR | |
2401 | "Profile version %u is not supported.\n", | |
2402 | ns->profile_version); | |
2403 | else if (!ns->profile_ptr[profile]) | |
2404 | printk(KERN_ERR | |
2405 | "Profile %u (used by '%s') is not defined.\n", | |
2406 | profile, domain->domainname->name); | |
2407 | else | |
c3ef1500 | 2408 | continue; |
bd03a3e4 TH |
2409 | printk(KERN_ERR |
2410 | "Userland tools for TOMOYO 2.4 must be installed and " | |
2411 | "policy must be initialized.\n"); | |
2412 | printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/2.4/ " | |
9f1c1d42 | 2413 | "for more information.\n"); |
bd03a3e4 | 2414 | panic("STOP!"); |
c3ef1500 TH |
2415 | } |
2416 | tomoyo_read_unlock(idx); | |
c3ef1500 | 2417 | printk(KERN_INFO "Mandatory Access Control activated.\n"); |
9590837b | 2418 | } |
efe836ab TH |
2419 | |
2420 | /** | |
2421 | * tomoyo_load_builtin_policy - Load built-in policy. | |
2422 | * | |
2423 | * Returns nothing. | |
2424 | */ | |
2425 | void __init tomoyo_load_builtin_policy(void) | |
2426 | { | |
2427 | /* | |
2428 | * This include file is manually created and contains built-in policy | |
2429 | * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy", | |
2430 | * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager", | |
2431 | * "tomoyo_builtin_stat" in the form of "static char [] __initdata". | |
2432 | */ | |
2433 | #include "builtin-policy.h" | |
2434 | u8 i; | |
2435 | const int idx = tomoyo_read_lock(); | |
2436 | for (i = 0; i < 5; i++) { | |
2437 | struct tomoyo_io_buffer head = { }; | |
2438 | char *start = ""; | |
2439 | switch (i) { | |
2440 | case 0: | |
2441 | start = tomoyo_builtin_profile; | |
2442 | head.type = TOMOYO_PROFILE; | |
2443 | head.write = tomoyo_write_profile; | |
2444 | break; | |
2445 | case 1: | |
2446 | start = tomoyo_builtin_exception_policy; | |
2447 | head.type = TOMOYO_EXCEPTIONPOLICY; | |
2448 | head.write = tomoyo_write_exception; | |
2449 | break; | |
2450 | case 2: | |
2451 | start = tomoyo_builtin_domain_policy; | |
2452 | head.type = TOMOYO_DOMAINPOLICY; | |
2453 | head.write = tomoyo_write_domain; | |
2454 | break; | |
2455 | case 3: | |
2456 | start = tomoyo_builtin_manager; | |
2457 | head.type = TOMOYO_MANAGER; | |
2458 | head.write = tomoyo_write_manager; | |
2459 | break; | |
2460 | case 4: | |
2461 | start = tomoyo_builtin_stat; | |
2462 | head.type = TOMOYO_STAT; | |
2463 | head.write = tomoyo_write_stat; | |
2464 | break; | |
2465 | } | |
2466 | while (1) { | |
2467 | char *end = strchr(start, '\n'); | |
2468 | if (!end) | |
2469 | break; | |
2470 | *end = '\0'; | |
2471 | tomoyo_normalize_line(start); | |
2472 | head.write_buf = start; | |
2473 | tomoyo_parse_policy(&head, start); | |
2474 | start = end + 1; | |
2475 | } | |
2476 | } | |
2477 | tomoyo_read_unlock(idx); | |
0e4ae0e0 TH |
2478 | #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER |
2479 | tomoyo_check_profile(); | |
2480 | #endif | |
efe836ab | 2481 | } |