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