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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 | |
57c2590f TH |
14 | /* Profile version. Currently only 20090903 is defined. */ |
15 | static unsigned int tomoyo_profile_version; | |
16 | ||
17 | /* Profile table. Memory is allocated as needed. */ | |
18 | static struct tomoyo_profile *tomoyo_profile_ptr[TOMOYO_MAX_PROFILES]; | |
19 | ||
9590837b | 20 | /* String table for functionality that takes 4 modes. */ |
f23571e8 | 21 | static const char *tomoyo_mode[4] = { |
9590837b KT |
22 | "disabled", "learning", "permissive", "enforcing" |
23 | }; | |
9590837b | 24 | |
57c2590f TH |
25 | /* String table for /sys/kernel/security/tomoyo/profile */ |
26 | static const char *tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX | |
27 | + TOMOYO_MAX_MAC_CATEGORY_INDEX] = { | |
28 | [TOMOYO_MAC_FILE_EXECUTE] = "file::execute", | |
29 | [TOMOYO_MAC_FILE_OPEN] = "file::open", | |
30 | [TOMOYO_MAC_FILE_CREATE] = "file::create", | |
31 | [TOMOYO_MAC_FILE_UNLINK] = "file::unlink", | |
7c75964f | 32 | [TOMOYO_MAC_FILE_GETATTR] = "file::getattr", |
57c2590f TH |
33 | [TOMOYO_MAC_FILE_MKDIR] = "file::mkdir", |
34 | [TOMOYO_MAC_FILE_RMDIR] = "file::rmdir", | |
35 | [TOMOYO_MAC_FILE_MKFIFO] = "file::mkfifo", | |
36 | [TOMOYO_MAC_FILE_MKSOCK] = "file::mksock", | |
37 | [TOMOYO_MAC_FILE_TRUNCATE] = "file::truncate", | |
38 | [TOMOYO_MAC_FILE_SYMLINK] = "file::symlink", | |
57c2590f TH |
39 | [TOMOYO_MAC_FILE_MKBLOCK] = "file::mkblock", |
40 | [TOMOYO_MAC_FILE_MKCHAR] = "file::mkchar", | |
41 | [TOMOYO_MAC_FILE_LINK] = "file::link", | |
42 | [TOMOYO_MAC_FILE_RENAME] = "file::rename", | |
43 | [TOMOYO_MAC_FILE_CHMOD] = "file::chmod", | |
44 | [TOMOYO_MAC_FILE_CHOWN] = "file::chown", | |
45 | [TOMOYO_MAC_FILE_CHGRP] = "file::chgrp", | |
46 | [TOMOYO_MAC_FILE_IOCTL] = "file::ioctl", | |
47 | [TOMOYO_MAC_FILE_CHROOT] = "file::chroot", | |
48 | [TOMOYO_MAC_FILE_MOUNT] = "file::mount", | |
0d2171d7 | 49 | [TOMOYO_MAC_FILE_UMOUNT] = "file::unmount", |
57c2590f TH |
50 | [TOMOYO_MAC_FILE_PIVOT_ROOT] = "file::pivot_root", |
51 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file", | |
9590837b KT |
52 | }; |
53 | ||
d5ca1725 TH |
54 | /* String table for PREFERENCE keyword. */ |
55 | static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = { | |
56 | [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry", | |
57 | }; | |
58 | ||
9590837b KT |
59 | /* Permit policy management by non-root user? */ |
60 | static bool tomoyo_manage_by_non_root; | |
61 | ||
62 | /* Utility functions. */ | |
63 | ||
57c2590f TH |
64 | /** |
65 | * tomoyo_yesno - Return "yes" or "no". | |
66 | * | |
67 | * @value: Bool value. | |
68 | */ | |
d5ca1725 | 69 | /* |
57c2590f TH |
70 | static const char *tomoyo_yesno(const unsigned int value) |
71 | { | |
72 | return value ? "yes" : "no"; | |
73 | } | |
d5ca1725 | 74 | */ |
57c2590f | 75 | |
d5ca1725 TH |
76 | /** |
77 | * tomoyo_addprintf - strncat()-like-snprintf(). | |
78 | * | |
79 | * @buffer: Buffer to write to. Must be '\0'-terminated. | |
80 | * @len: Size of @buffer. | |
81 | * @fmt: The printf()'s format string, followed by parameters. | |
82 | * | |
83 | * Returns nothing. | |
84 | */ | |
f23571e8 TH |
85 | static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...) |
86 | { | |
87 | va_list args; | |
88 | const int pos = strlen(buffer); | |
89 | va_start(args, fmt); | |
90 | vsnprintf(buffer + pos, len - pos - 1, fmt, args); | |
91 | va_end(args); | |
92 | } | |
93 | ||
7762fbff | 94 | /** |
f23571e8 | 95 | * tomoyo_flush - Flush queued string to userspace's buffer. |
7762fbff | 96 | * |
f23571e8 | 97 | * @head: Pointer to "struct tomoyo_io_buffer". |
7762fbff | 98 | * |
f23571e8 | 99 | * Returns true if all data was flushed, false otherwise. |
7762fbff | 100 | */ |
f23571e8 | 101 | static bool tomoyo_flush(struct tomoyo_io_buffer *head) |
7762fbff | 102 | { |
f23571e8 TH |
103 | while (head->r.w_pos) { |
104 | const char *w = head->r.w[0]; | |
105 | int len = strlen(w); | |
106 | if (len) { | |
107 | if (len > head->read_user_buf_avail) | |
108 | len = head->read_user_buf_avail; | |
109 | if (!len) | |
110 | return false; | |
111 | if (copy_to_user(head->read_user_buf, w, len)) | |
112 | return false; | |
113 | head->read_user_buf_avail -= len; | |
114 | head->read_user_buf += len; | |
115 | w += len; | |
116 | } | |
c0fa797a TH |
117 | head->r.w[0] = w; |
118 | if (*w) | |
f23571e8 | 119 | return false; |
f23571e8 TH |
120 | /* Add '\0' for query. */ |
121 | if (head->poll) { | |
122 | if (!head->read_user_buf_avail || | |
123 | copy_to_user(head->read_user_buf, "", 1)) | |
124 | return false; | |
125 | head->read_user_buf_avail--; | |
126 | head->read_user_buf++; | |
127 | } | |
128 | head->r.w_pos--; | |
129 | for (len = 0; len < head->r.w_pos; len++) | |
130 | head->r.w[len] = head->r.w[len + 1]; | |
131 | } | |
132 | head->r.avail = 0; | |
133 | return true; | |
7762fbff TH |
134 | } |
135 | ||
4c3e9e2d | 136 | /** |
f23571e8 | 137 | * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure. |
4c3e9e2d | 138 | * |
f23571e8 TH |
139 | * @head: Pointer to "struct tomoyo_io_buffer". |
140 | * @string: String to print. | |
4c3e9e2d | 141 | * |
f23571e8 TH |
142 | * Note that @string has to be kept valid until @head is kfree()d. |
143 | * This means that char[] allocated on stack memory cannot be passed to | |
144 | * this function. Use tomoyo_io_printf() for char[] allocated on stack memory. | |
4c3e9e2d | 145 | */ |
f23571e8 | 146 | static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string) |
4c3e9e2d | 147 | { |
f23571e8 TH |
148 | if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) { |
149 | head->r.w[head->r.w_pos++] = string; | |
150 | tomoyo_flush(head); | |
151 | } else | |
152 | WARN_ON(1); | |
4c3e9e2d TH |
153 | } |
154 | ||
9590837b | 155 | /** |
f23571e8 | 156 | * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure. |
9590837b KT |
157 | * |
158 | * @head: Pointer to "struct tomoyo_io_buffer". | |
159 | * @fmt: The printf()'s format string, followed by parameters. | |
9590837b | 160 | */ |
f23571e8 | 161 | void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...) |
9590837b KT |
162 | { |
163 | va_list args; | |
164 | int len; | |
f23571e8 | 165 | int pos = head->r.avail; |
9590837b | 166 | int size = head->readbuf_size - pos; |
9590837b | 167 | if (size <= 0) |
f23571e8 | 168 | return; |
9590837b | 169 | va_start(args, fmt); |
f23571e8 | 170 | len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1; |
9590837b | 171 | va_end(args); |
f23571e8 TH |
172 | if (pos + len >= head->readbuf_size) { |
173 | WARN_ON(1); | |
174 | return; | |
175 | } | |
176 | head->r.avail += len; | |
177 | tomoyo_set_string(head, head->read_buf + pos); | |
178 | } | |
179 | ||
0d2171d7 TH |
180 | /** |
181 | * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure. | |
182 | * | |
183 | * @head: Pointer to "struct tomoyo_io_buffer". | |
184 | * | |
185 | * Returns nothing. | |
186 | */ | |
f23571e8 TH |
187 | static void tomoyo_set_space(struct tomoyo_io_buffer *head) |
188 | { | |
189 | tomoyo_set_string(head, " "); | |
190 | } | |
191 | ||
0d2171d7 TH |
192 | /** |
193 | * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure. | |
194 | * | |
195 | * @head: Pointer to "struct tomoyo_io_buffer". | |
196 | * | |
197 | * Returns nothing. | |
198 | */ | |
f23571e8 TH |
199 | static bool tomoyo_set_lf(struct tomoyo_io_buffer *head) |
200 | { | |
201 | tomoyo_set_string(head, "\n"); | |
202 | return !head->r.w_pos; | |
203 | } | |
204 | ||
0d2171d7 TH |
205 | /** |
206 | * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure. | |
207 | * | |
208 | * @head: Pointer to "struct tomoyo_io_buffer". | |
209 | * | |
210 | * Returns nothing. | |
211 | */ | |
212 | static void tomoyo_set_slash(struct tomoyo_io_buffer *head) | |
213 | { | |
214 | tomoyo_set_string(head, "/"); | |
215 | } | |
216 | ||
f23571e8 TH |
217 | /** |
218 | * tomoyo_print_name_union - Print a tomoyo_name_union. | |
219 | * | |
220 | * @head: Pointer to "struct tomoyo_io_buffer". | |
221 | * @ptr: Pointer to "struct tomoyo_name_union". | |
222 | */ | |
223 | static void tomoyo_print_name_union(struct tomoyo_io_buffer *head, | |
224 | const struct tomoyo_name_union *ptr) | |
225 | { | |
226 | tomoyo_set_space(head); | |
0df7e8b8 | 227 | if (ptr->group) { |
f23571e8 TH |
228 | tomoyo_set_string(head, "@"); |
229 | tomoyo_set_string(head, ptr->group->group_name->name); | |
230 | } else { | |
231 | tomoyo_set_string(head, ptr->filename->name); | |
232 | } | |
233 | } | |
234 | ||
235 | /** | |
236 | * tomoyo_print_number_union - Print a tomoyo_number_union. | |
237 | * | |
238 | * @head: Pointer to "struct tomoyo_io_buffer". | |
239 | * @ptr: Pointer to "struct tomoyo_number_union". | |
240 | */ | |
241 | static void tomoyo_print_number_union(struct tomoyo_io_buffer *head, | |
242 | const struct tomoyo_number_union *ptr) | |
243 | { | |
244 | tomoyo_set_space(head); | |
0df7e8b8 | 245 | if (ptr->group) { |
f23571e8 TH |
246 | tomoyo_set_string(head, "@"); |
247 | tomoyo_set_string(head, ptr->group->group_name->name); | |
248 | } else { | |
249 | int i; | |
250 | unsigned long min = ptr->values[0]; | |
251 | const unsigned long max = ptr->values[1]; | |
0df7e8b8 TH |
252 | u8 min_type = ptr->value_type[0]; |
253 | const u8 max_type = ptr->value_type[1]; | |
f23571e8 TH |
254 | char buffer[128]; |
255 | buffer[0] = '\0'; | |
256 | for (i = 0; i < 2; i++) { | |
257 | switch (min_type) { | |
258 | case TOMOYO_VALUE_TYPE_HEXADECIMAL: | |
259 | tomoyo_addprintf(buffer, sizeof(buffer), | |
260 | "0x%lX", min); | |
261 | break; | |
262 | case TOMOYO_VALUE_TYPE_OCTAL: | |
263 | tomoyo_addprintf(buffer, sizeof(buffer), | |
264 | "0%lo", min); | |
265 | break; | |
266 | default: | |
267 | tomoyo_addprintf(buffer, sizeof(buffer), | |
268 | "%lu", min); | |
269 | break; | |
270 | } | |
271 | if (min == max && min_type == max_type) | |
272 | break; | |
273 | tomoyo_addprintf(buffer, sizeof(buffer), "-"); | |
274 | min_type = max_type; | |
275 | min = max; | |
276 | } | |
277 | tomoyo_io_printf(head, "%s", buffer); | |
278 | } | |
9590837b KT |
279 | } |
280 | ||
9590837b | 281 | /** |
e2bf6907 | 282 | * tomoyo_assign_profile - Create a new profile. |
9590837b KT |
283 | * |
284 | * @profile: Profile number to create. | |
285 | * | |
286 | * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise. | |
287 | */ | |
e2bf6907 | 288 | static struct tomoyo_profile *tomoyo_assign_profile(const unsigned int profile) |
9590837b | 289 | { |
57c2590f TH |
290 | struct tomoyo_profile *ptr; |
291 | struct tomoyo_profile *entry; | |
9590837b KT |
292 | if (profile >= TOMOYO_MAX_PROFILES) |
293 | return NULL; | |
9590837b KT |
294 | ptr = tomoyo_profile_ptr[profile]; |
295 | if (ptr) | |
57c2590f TH |
296 | return ptr; |
297 | entry = kzalloc(sizeof(*entry), GFP_NOFS); | |
298 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) | |
299 | goto out; | |
300 | ptr = tomoyo_profile_ptr[profile]; | |
301 | if (!ptr && tomoyo_memory_ok(entry)) { | |
302 | ptr = entry; | |
57c2590f TH |
303 | ptr->default_config = TOMOYO_CONFIG_DISABLED; |
304 | memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT, | |
305 | sizeof(ptr->config)); | |
d5ca1725 | 306 | ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] = 2048; |
57c2590f TH |
307 | mb(); /* Avoid out-of-order execution. */ |
308 | tomoyo_profile_ptr[profile] = ptr; | |
309 | entry = NULL; | |
cd7bec6a | 310 | } |
29282381 | 311 | mutex_unlock(&tomoyo_policy_lock); |
57c2590f TH |
312 | out: |
313 | kfree(entry); | |
9590837b KT |
314 | return ptr; |
315 | } | |
316 | ||
317 | /** | |
57c2590f TH |
318 | * tomoyo_profile - Find a profile. |
319 | * | |
320 | * @profile: Profile number to find. | |
321 | * | |
322 | * Returns pointer to "struct tomoyo_profile". | |
323 | */ | |
324 | struct tomoyo_profile *tomoyo_profile(const u8 profile) | |
325 | { | |
d5ca1725 | 326 | static struct tomoyo_profile tomoyo_null_profile; |
57c2590f | 327 | struct tomoyo_profile *ptr = tomoyo_profile_ptr[profile]; |
d5ca1725 TH |
328 | if (!ptr) |
329 | ptr = &tomoyo_null_profile; | |
57c2590f TH |
330 | return ptr; |
331 | } | |
332 | ||
d5ca1725 TH |
333 | /** |
334 | * tomoyo_find_yesno - Find values for specified keyword. | |
335 | * | |
336 | * @string: String to check. | |
337 | * @find: Name of keyword. | |
338 | * | |
339 | * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise. | |
340 | */ | |
341 | /* | |
8e568687 TH |
342 | static s8 tomoyo_find_yesno(const char *string, const char *find) |
343 | { | |
344 | const char *cp = strstr(string, find); | |
345 | if (cp) { | |
346 | cp += strlen(find); | |
347 | if (!strncmp(cp, "=yes", 4)) | |
348 | return 1; | |
349 | else if (!strncmp(cp, "=no", 3)) | |
350 | return 0; | |
351 | } | |
352 | return -1; | |
353 | } | |
d5ca1725 | 354 | */ |
8e568687 | 355 | |
d5ca1725 TH |
356 | /** |
357 | * tomoyo_set_uint - Set value for specified preference. | |
358 | * | |
359 | * @i: Pointer to "unsigned int". | |
360 | * @string: String to check. | |
361 | * @find: Name of keyword. | |
362 | * | |
363 | * Returns nothing. | |
364 | */ | |
8e568687 TH |
365 | static void tomoyo_set_uint(unsigned int *i, const char *string, |
366 | const char *find) | |
367 | { | |
368 | const char *cp = strstr(string, find); | |
369 | if (cp) | |
370 | sscanf(cp + strlen(find), "=%u", i); | |
371 | } | |
372 | ||
d5ca1725 TH |
373 | /** |
374 | * tomoyo_set_mode - Set mode for specified profile. | |
375 | * | |
376 | * @name: Name of functionality. | |
377 | * @value: Mode for @name. | |
378 | * @profile: Pointer to "struct tomoyo_profile". | |
379 | * | |
380 | * Returns 0 on success, negative value otherwise. | |
381 | */ | |
8e568687 | 382 | static int tomoyo_set_mode(char *name, const char *value, |
8e568687 TH |
383 | struct tomoyo_profile *profile) |
384 | { | |
385 | u8 i; | |
386 | u8 config; | |
387 | if (!strcmp(name, "CONFIG")) { | |
388 | i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX; | |
389 | config = profile->default_config; | |
390 | } else if (tomoyo_str_starts(&name, "CONFIG::")) { | |
391 | config = 0; | |
392 | for (i = 0; i < TOMOYO_MAX_MAC_INDEX | |
393 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) { | |
394 | if (strcmp(name, tomoyo_mac_keywords[i])) | |
395 | continue; | |
396 | config = profile->config[i]; | |
397 | break; | |
398 | } | |
399 | if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) | |
400 | return -EINVAL; | |
401 | } else { | |
402 | return -EINVAL; | |
403 | } | |
d5ca1725 | 404 | if (strstr(value, "use_default")) { |
8e568687 TH |
405 | config = TOMOYO_CONFIG_USE_DEFAULT; |
406 | } else { | |
407 | u8 mode; | |
408 | for (mode = 0; mode < 4; mode++) | |
409 | if (strstr(value, tomoyo_mode[mode])) | |
410 | /* | |
411 | * Update lower 3 bits in order to distinguish | |
412 | * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'. | |
413 | */ | |
414 | config = (config & ~7) | mode; | |
415 | } | |
416 | if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) | |
417 | profile->config[i] = config; | |
418 | else if (config != TOMOYO_CONFIG_USE_DEFAULT) | |
419 | profile->default_config = config; | |
420 | return 0; | |
421 | } | |
422 | ||
57c2590f TH |
423 | /** |
424 | * tomoyo_write_profile - Write profile table. | |
9590837b KT |
425 | * |
426 | * @head: Pointer to "struct tomoyo_io_buffer". | |
427 | * | |
428 | * Returns 0 on success, negative value otherwise. | |
429 | */ | |
430 | static int tomoyo_write_profile(struct tomoyo_io_buffer *head) | |
431 | { | |
432 | char *data = head->write_buf; | |
433 | unsigned int i; | |
9590837b KT |
434 | char *cp; |
435 | struct tomoyo_profile *profile; | |
57c2590f TH |
436 | if (sscanf(data, "PROFILE_VERSION=%u", &tomoyo_profile_version) == 1) |
437 | return 0; | |
438 | i = simple_strtoul(data, &cp, 10); | |
d5ca1725 TH |
439 | if (*cp != '-') |
440 | return -EINVAL; | |
441 | data = cp + 1; | |
442 | profile = tomoyo_assign_profile(i); | |
443 | if (!profile) | |
444 | return -EINVAL; | |
9590837b KT |
445 | cp = strchr(data, '='); |
446 | if (!cp) | |
447 | return -EINVAL; | |
57c2590f | 448 | *cp++ = '\0'; |
9590837b | 449 | if (!strcmp(data, "COMMENT")) { |
2a086e5d TH |
450 | static DEFINE_SPINLOCK(lock); |
451 | const struct tomoyo_path_info *new_comment | |
452 | = tomoyo_get_name(cp); | |
453 | const struct tomoyo_path_info *old_comment; | |
454 | if (!new_comment) | |
455 | return -ENOMEM; | |
456 | spin_lock(&lock); | |
457 | old_comment = profile->comment; | |
458 | profile->comment = new_comment; | |
459 | spin_unlock(&lock); | |
bf24fb01 | 460 | tomoyo_put_name(old_comment); |
9590837b KT |
461 | return 0; |
462 | } | |
d5ca1725 TH |
463 | if (!strcmp(data, "PREFERENCE")) { |
464 | for (i = 0; i < TOMOYO_MAX_PREF; i++) | |
465 | tomoyo_set_uint(&profile->pref[i], cp, | |
466 | tomoyo_pref_keywords[i]); | |
467 | return 0; | |
f23571e8 | 468 | } |
d5ca1725 | 469 | return tomoyo_set_mode(data, cp, profile); |
f23571e8 TH |
470 | } |
471 | ||
472 | static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config) | |
473 | { | |
474 | tomoyo_io_printf(head, "={ mode=%s }\n", tomoyo_mode[config & 3]); | |
475 | } | |
476 | ||
9590837b | 477 | /** |
57c2590f | 478 | * tomoyo_read_profile - Read profile table. |
9590837b KT |
479 | * |
480 | * @head: Pointer to "struct tomoyo_io_buffer". | |
9590837b | 481 | */ |
8fbe71f0 | 482 | static void tomoyo_read_profile(struct tomoyo_io_buffer *head) |
9590837b | 483 | { |
f23571e8 TH |
484 | u8 index; |
485 | const struct tomoyo_profile *profile; | |
486 | next: | |
487 | index = head->r.index; | |
488 | profile = tomoyo_profile_ptr[index]; | |
489 | switch (head->r.step) { | |
490 | case 0: | |
491 | tomoyo_io_printf(head, "PROFILE_VERSION=%s\n", "20090903"); | |
f23571e8 TH |
492 | head->r.step++; |
493 | break; | |
494 | case 1: | |
495 | for ( ; head->r.index < TOMOYO_MAX_PROFILES; | |
496 | head->r.index++) | |
497 | if (tomoyo_profile_ptr[head->r.index]) | |
498 | break; | |
499 | if (head->r.index == TOMOYO_MAX_PROFILES) | |
500 | return; | |
501 | head->r.step++; | |
502 | break; | |
503 | case 2: | |
504 | { | |
d5ca1725 | 505 | u8 i; |
f23571e8 TH |
506 | const struct tomoyo_path_info *comment = |
507 | profile->comment; | |
508 | tomoyo_io_printf(head, "%u-COMMENT=", index); | |
509 | tomoyo_set_string(head, comment ? comment->name : ""); | |
510 | tomoyo_set_lf(head); | |
d5ca1725 TH |
511 | tomoyo_io_printf(head, "%u-PREFERENCE={ ", index); |
512 | for (i = 0; i < TOMOYO_MAX_PREF; i++) | |
513 | tomoyo_io_printf(head, "%s=%u ", | |
514 | tomoyo_pref_keywords[i], | |
515 | profile->pref[i]); | |
516 | tomoyo_set_string(head, "}\n"); | |
f23571e8 TH |
517 | head->r.step++; |
518 | } | |
519 | break; | |
520 | case 3: | |
521 | { | |
522 | tomoyo_io_printf(head, "%u-%s", index, "CONFIG"); | |
523 | tomoyo_print_config(head, profile->default_config); | |
524 | head->r.bit = 0; | |
525 | head->r.step++; | |
526 | } | |
527 | break; | |
528 | case 4: | |
529 | for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX | |
530 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) { | |
531 | const u8 i = head->r.bit; | |
532 | const u8 config = profile->config[i]; | |
57c2590f TH |
533 | if (config == TOMOYO_CONFIG_USE_DEFAULT) |
534 | continue; | |
f23571e8 TH |
535 | tomoyo_io_printf(head, "%u-%s%s", index, "CONFIG::", |
536 | tomoyo_mac_keywords[i]); | |
537 | tomoyo_print_config(head, config); | |
538 | head->r.bit++; | |
539 | break; | |
540 | } | |
541 | if (head->r.bit == TOMOYO_MAX_MAC_INDEX | |
542 | + TOMOYO_MAX_MAC_CATEGORY_INDEX) { | |
f23571e8 TH |
543 | head->r.index++; |
544 | head->r.step = 1; | |
9590837b | 545 | } |
57c2590f | 546 | break; |
9590837b | 547 | } |
f23571e8 TH |
548 | if (tomoyo_flush(head)) |
549 | goto next; | |
9590837b KT |
550 | } |
551 | ||
e2bf6907 TH |
552 | static bool tomoyo_same_manager(const struct tomoyo_acl_head *a, |
553 | const struct tomoyo_acl_head *b) | |
36f5e1ff | 554 | { |
e2bf6907 TH |
555 | return container_of(a, struct tomoyo_manager, head)->manager == |
556 | container_of(b, struct tomoyo_manager, head)->manager; | |
36f5e1ff TH |
557 | } |
558 | ||
9590837b KT |
559 | /** |
560 | * tomoyo_update_manager_entry - Add a manager entry. | |
561 | * | |
562 | * @manager: The path to manager or the domainnamme. | |
563 | * @is_delete: True if it is a delete request. | |
564 | * | |
565 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
566 | * |
567 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
568 | */ |
569 | static int tomoyo_update_manager_entry(const char *manager, | |
570 | const bool is_delete) | |
571 | { | |
e2bf6907 | 572 | struct tomoyo_manager e = { }; |
a238cf5b TH |
573 | struct tomoyo_acl_param param = { |
574 | .is_delete = is_delete, | |
575 | .list = &tomoyo_policy_list[TOMOYO_ID_MANAGER], | |
576 | }; | |
577 | int error = is_delete ? -ENOENT : -ENOMEM; | |
75093152 TH |
578 | if (tomoyo_domain_def(manager)) { |
579 | if (!tomoyo_correct_domain(manager)) | |
9590837b | 580 | return -EINVAL; |
9e4b50e9 | 581 | e.is_domain = true; |
9590837b | 582 | } else { |
75093152 | 583 | if (!tomoyo_correct_path(manager)) |
9590837b KT |
584 | return -EINVAL; |
585 | } | |
9e4b50e9 | 586 | e.manager = tomoyo_get_name(manager); |
a238cf5b TH |
587 | if (e.manager) { |
588 | error = tomoyo_update_policy(&e.head, sizeof(e), ¶m, | |
589 | tomoyo_same_manager); | |
590 | tomoyo_put_name(e.manager); | |
591 | } | |
9590837b KT |
592 | return error; |
593 | } | |
594 | ||
595 | /** | |
e2bf6907 | 596 | * tomoyo_write_manager - Write manager policy. |
9590837b KT |
597 | * |
598 | * @head: Pointer to "struct tomoyo_io_buffer". | |
599 | * | |
600 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
601 | * |
602 | * Caller holds tomoyo_read_lock(). | |
9590837b | 603 | */ |
e2bf6907 | 604 | static int tomoyo_write_manager(struct tomoyo_io_buffer *head) |
9590837b KT |
605 | { |
606 | char *data = head->write_buf; | |
b5bc60b4 | 607 | bool is_delete = tomoyo_str_starts(&data, "delete "); |
9590837b KT |
608 | |
609 | if (!strcmp(data, "manage_by_non_root")) { | |
610 | tomoyo_manage_by_non_root = !is_delete; | |
611 | return 0; | |
612 | } | |
613 | return tomoyo_update_manager_entry(data, is_delete); | |
614 | } | |
615 | ||
616 | /** | |
e2bf6907 | 617 | * tomoyo_read_manager - Read manager policy. |
9590837b KT |
618 | * |
619 | * @head: Pointer to "struct tomoyo_io_buffer". | |
620 | * | |
fdb8ebb7 | 621 | * Caller holds tomoyo_read_lock(). |
9590837b | 622 | */ |
e2bf6907 | 623 | static void tomoyo_read_manager(struct tomoyo_io_buffer *head) |
9590837b | 624 | { |
f23571e8 | 625 | if (head->r.eof) |
8fbe71f0 | 626 | return; |
f23571e8 | 627 | list_for_each_cookie(head->r.acl, |
a230f9e7 | 628 | &tomoyo_policy_list[TOMOYO_ID_MANAGER]) { |
e2bf6907 | 629 | struct tomoyo_manager *ptr = |
f23571e8 | 630 | list_entry(head->r.acl, typeof(*ptr), head.list); |
82e0f001 | 631 | if (ptr->head.is_deleted) |
9590837b | 632 | continue; |
f23571e8 TH |
633 | if (!tomoyo_flush(head)) |
634 | return; | |
635 | tomoyo_set_string(head, ptr->manager->name); | |
636 | tomoyo_set_lf(head); | |
9590837b | 637 | } |
f23571e8 | 638 | head->r.eof = true; |
9590837b KT |
639 | } |
640 | ||
641 | /** | |
e2bf6907 | 642 | * tomoyo_manager - Check whether the current process is a policy manager. |
9590837b KT |
643 | * |
644 | * Returns true if the current process is permitted to modify policy | |
645 | * via /sys/kernel/security/tomoyo/ interface. | |
fdb8ebb7 TH |
646 | * |
647 | * Caller holds tomoyo_read_lock(). | |
9590837b | 648 | */ |
e2bf6907 | 649 | static bool tomoyo_manager(void) |
9590837b | 650 | { |
e2bf6907 | 651 | struct tomoyo_manager *ptr; |
9590837b KT |
652 | const char *exe; |
653 | const struct task_struct *task = current; | |
654 | const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname; | |
655 | bool found = false; | |
656 | ||
657 | if (!tomoyo_policy_loaded) | |
658 | return true; | |
659 | if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid)) | |
660 | return false; | |
a230f9e7 TH |
661 | list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_MANAGER], |
662 | head.list) { | |
82e0f001 | 663 | if (!ptr->head.is_deleted && ptr->is_domain |
9590837b KT |
664 | && !tomoyo_pathcmp(domainname, ptr->manager)) { |
665 | found = true; | |
666 | break; | |
667 | } | |
668 | } | |
9590837b KT |
669 | if (found) |
670 | return true; | |
671 | exe = tomoyo_get_exe(); | |
672 | if (!exe) | |
673 | return false; | |
a230f9e7 TH |
674 | list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_MANAGER], |
675 | head.list) { | |
82e0f001 | 676 | if (!ptr->head.is_deleted && !ptr->is_domain |
9590837b KT |
677 | && !strcmp(exe, ptr->manager->name)) { |
678 | found = true; | |
679 | break; | |
680 | } | |
681 | } | |
9590837b KT |
682 | if (!found) { /* Reduce error messages. */ |
683 | static pid_t last_pid; | |
684 | const pid_t pid = current->pid; | |
685 | if (last_pid != pid) { | |
686 | printk(KERN_WARNING "%s ( %s ) is not permitted to " | |
687 | "update policies.\n", domainname->name, exe); | |
688 | last_pid = pid; | |
689 | } | |
690 | } | |
8e2d39a1 | 691 | kfree(exe); |
9590837b KT |
692 | return found; |
693 | } | |
694 | ||
695 | /** | |
75093152 | 696 | * tomoyo_select_one - Parse select command. |
9590837b KT |
697 | * |
698 | * @head: Pointer to "struct tomoyo_io_buffer". | |
699 | * @data: String to parse. | |
700 | * | |
701 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
702 | * |
703 | * Caller holds tomoyo_read_lock(). | |
9590837b | 704 | */ |
475e6fa3 | 705 | static bool tomoyo_select_one(struct tomoyo_io_buffer *head, const char *data) |
9590837b KT |
706 | { |
707 | unsigned int pid; | |
708 | struct tomoyo_domain_info *domain = NULL; | |
9b244373 | 709 | bool global_pid = false; |
9590837b | 710 | |
063821c8 | 711 | if (!strcmp(data, "allow_execute")) { |
f23571e8 | 712 | head->r.print_execute_only = true; |
063821c8 TH |
713 | return true; |
714 | } | |
9b244373 TH |
715 | if (sscanf(data, "pid=%u", &pid) == 1 || |
716 | (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) { | |
9590837b | 717 | struct task_struct *p; |
1fcdc7c5 | 718 | rcu_read_lock(); |
9590837b | 719 | read_lock(&tasklist_lock); |
9b244373 TH |
720 | if (global_pid) |
721 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
722 | else | |
723 | p = find_task_by_vpid(pid); | |
9590837b KT |
724 | if (p) |
725 | domain = tomoyo_real_domain(p); | |
726 | read_unlock(&tasklist_lock); | |
1fcdc7c5 | 727 | rcu_read_unlock(); |
9590837b | 728 | } else if (!strncmp(data, "domain=", 7)) { |
75093152 | 729 | if (tomoyo_domain_def(data + 7)) |
9590837b | 730 | domain = tomoyo_find_domain(data + 7); |
9590837b KT |
731 | } else |
732 | return false; | |
0df7e8b8 | 733 | head->w.domain = domain; |
9590837b KT |
734 | /* Accessing read_buf is safe because head->io_sem is held. */ |
735 | if (!head->read_buf) | |
736 | return true; /* Do nothing if open(O_WRONLY). */ | |
f23571e8 TH |
737 | memset(&head->r, 0, sizeof(head->r)); |
738 | head->r.print_this_domain_only = true; | |
68eda8f5 DC |
739 | if (domain) |
740 | head->r.domain = &domain->list; | |
741 | else | |
742 | head->r.eof = 1; | |
9590837b | 743 | tomoyo_io_printf(head, "# select %s\n", data); |
475e6fa3 TH |
744 | if (domain && domain->is_deleted) |
745 | tomoyo_io_printf(head, "# This is a deleted domain.\n"); | |
9590837b KT |
746 | return true; |
747 | } | |
748 | ||
ccf135f5 TH |
749 | /** |
750 | * tomoyo_delete_domain - Delete a domain. | |
751 | * | |
752 | * @domainname: The name of domain. | |
753 | * | |
754 | * Returns 0. | |
fdb8ebb7 TH |
755 | * |
756 | * Caller holds tomoyo_read_lock(). | |
ccf135f5 TH |
757 | */ |
758 | static int tomoyo_delete_domain(char *domainname) | |
759 | { | |
760 | struct tomoyo_domain_info *domain; | |
761 | struct tomoyo_path_info name; | |
762 | ||
763 | name.name = domainname; | |
764 | tomoyo_fill_path_info(&name); | |
29282381 TH |
765 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
766 | return 0; | |
ccf135f5 | 767 | /* Is there an active domain? */ |
fdb8ebb7 | 768 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
ccf135f5 TH |
769 | /* Never delete tomoyo_kernel_domain */ |
770 | if (domain == &tomoyo_kernel_domain) | |
771 | continue; | |
772 | if (domain->is_deleted || | |
773 | tomoyo_pathcmp(domain->domainname, &name)) | |
774 | continue; | |
775 | domain->is_deleted = true; | |
776 | break; | |
777 | } | |
f737d95d | 778 | mutex_unlock(&tomoyo_policy_lock); |
ccf135f5 TH |
779 | return 0; |
780 | } | |
781 | ||
17fcfbd9 | 782 | /** |
e2bf6907 | 783 | * tomoyo_write_domain2 - Write domain policy. |
17fcfbd9 | 784 | * |
a238cf5b TH |
785 | * @list: Pointer to "struct list_head". |
786 | * @data: Policy to be interpreted. | |
787 | * @is_delete: True if it is a delete request. | |
17fcfbd9 TH |
788 | * |
789 | * Returns 0 on success, negative value otherwise. | |
790 | * | |
791 | * Caller holds tomoyo_read_lock(). | |
792 | */ | |
a238cf5b | 793 | static int tomoyo_write_domain2(struct list_head *list, char *data, |
e2bf6907 | 794 | const bool is_delete) |
17fcfbd9 | 795 | { |
a238cf5b TH |
796 | struct tomoyo_acl_param param = { |
797 | .list = list, | |
798 | .data = data, | |
799 | .is_delete = is_delete, | |
800 | }; | |
801 | static const struct { | |
802 | const char *keyword; | |
803 | int (*write) (struct tomoyo_acl_param *); | |
804 | } tomoyo_callback[1] = { | |
805 | { "file ", tomoyo_write_file }, | |
806 | }; | |
807 | u8 i; | |
808 | for (i = 0; i < 1; i++) { | |
809 | if (!tomoyo_str_starts(¶m.data, | |
810 | tomoyo_callback[i].keyword)) | |
811 | continue; | |
812 | return tomoyo_callback[i].write(¶m); | |
813 | } | |
814 | return -EINVAL; | |
17fcfbd9 TH |
815 | } |
816 | ||
9590837b | 817 | /** |
e2bf6907 | 818 | * tomoyo_write_domain - Write domain policy. |
9590837b KT |
819 | * |
820 | * @head: Pointer to "struct tomoyo_io_buffer". | |
821 | * | |
822 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
823 | * |
824 | * Caller holds tomoyo_read_lock(). | |
9590837b | 825 | */ |
e2bf6907 | 826 | static int tomoyo_write_domain(struct tomoyo_io_buffer *head) |
9590837b KT |
827 | { |
828 | char *data = head->write_buf; | |
0df7e8b8 | 829 | struct tomoyo_domain_info *domain = head->w.domain; |
9590837b KT |
830 | bool is_delete = false; |
831 | bool is_select = false; | |
9590837b KT |
832 | unsigned int profile; |
833 | ||
b5bc60b4 | 834 | if (tomoyo_str_starts(&data, "delete ")) |
9590837b | 835 | is_delete = true; |
b5bc60b4 | 836 | else if (tomoyo_str_starts(&data, "select ")) |
9590837b | 837 | is_select = true; |
75093152 | 838 | if (is_select && tomoyo_select_one(head, data)) |
9590837b KT |
839 | return 0; |
840 | /* Don't allow updating policies by non manager programs. */ | |
e2bf6907 | 841 | if (!tomoyo_manager()) |
9590837b | 842 | return -EPERM; |
75093152 | 843 | if (tomoyo_domain_def(data)) { |
9590837b KT |
844 | domain = NULL; |
845 | if (is_delete) | |
846 | tomoyo_delete_domain(data); | |
fdb8ebb7 | 847 | else if (is_select) |
9590837b | 848 | domain = tomoyo_find_domain(data); |
fdb8ebb7 | 849 | else |
e2bf6907 | 850 | domain = tomoyo_assign_domain(data, 0); |
0df7e8b8 | 851 | head->w.domain = domain; |
9590837b KT |
852 | return 0; |
853 | } | |
854 | if (!domain) | |
855 | return -EINVAL; | |
856 | ||
b5bc60b4 | 857 | if (sscanf(data, "use_profile %u", &profile) == 1 |
9590837b KT |
858 | && profile < TOMOYO_MAX_PROFILES) { |
859 | if (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded) | |
860 | domain->profile = (u8) profile; | |
861 | return 0; | |
862 | } | |
b5bc60b4 | 863 | if (!strcmp(data, "quota_exceeded")) { |
9b244373 TH |
864 | domain->quota_warned = !is_delete; |
865 | return 0; | |
866 | } | |
b5bc60b4 | 867 | if (!strcmp(data, "transition_failed")) { |
9b244373 TH |
868 | domain->transition_failed = !is_delete; |
869 | return 0; | |
870 | } | |
a238cf5b | 871 | return tomoyo_write_domain2(&domain->acl_info_list, data, is_delete); |
9590837b KT |
872 | } |
873 | ||
874 | /** | |
0d2171d7 | 875 | * tomoyo_set_group - Print category name. |
9590837b | 876 | * |
0d2171d7 TH |
877 | * @head: Pointer to "struct tomoyo_io_buffer". |
878 | * @category: Category name. | |
9590837b | 879 | * |
0d2171d7 | 880 | * Returns nothing. |
9590837b | 881 | */ |
0d2171d7 TH |
882 | static void tomoyo_set_group(struct tomoyo_io_buffer *head, |
883 | const char *category) | |
9590837b | 884 | { |
0d2171d7 | 885 | tomoyo_set_string(head, category); |
9590837b KT |
886 | } |
887 | ||
888 | /** | |
5db5a39b | 889 | * tomoyo_print_entry - Print an ACL entry. |
9590837b KT |
890 | * |
891 | * @head: Pointer to "struct tomoyo_io_buffer". | |
5db5a39b | 892 | * @acl: Pointer to an ACL entry. |
9590837b KT |
893 | * |
894 | * Returns true on success, false otherwise. | |
895 | */ | |
5db5a39b TH |
896 | static bool tomoyo_print_entry(struct tomoyo_io_buffer *head, |
897 | struct tomoyo_acl_info *acl) | |
9590837b | 898 | { |
5db5a39b | 899 | const u8 acl_type = acl->type; |
0d2171d7 | 900 | bool first = true; |
f23571e8 | 901 | u8 bit; |
9590837b | 902 | |
5db5a39b TH |
903 | if (acl->is_deleted) |
904 | return true; | |
f23571e8 TH |
905 | if (!tomoyo_flush(head)) |
906 | return false; | |
907 | else if (acl_type == TOMOYO_TYPE_PATH_ACL) { | |
5db5a39b TH |
908 | struct tomoyo_path_acl *ptr = |
909 | container_of(acl, typeof(*ptr), head); | |
910 | const u16 perm = ptr->perm; | |
0d2171d7 | 911 | for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) { |
5db5a39b TH |
912 | if (!(perm & (1 << bit))) |
913 | continue; | |
f23571e8 | 914 | if (head->r.print_execute_only && |
5db5a39b TH |
915 | bit != TOMOYO_TYPE_EXECUTE) |
916 | continue; | |
0d2171d7 TH |
917 | if (first) { |
918 | tomoyo_set_group(head, "file "); | |
919 | first = false; | |
920 | } else { | |
921 | tomoyo_set_slash(head); | |
922 | } | |
923 | tomoyo_set_string(head, tomoyo_path_keyword[bit]); | |
5db5a39b | 924 | } |
0d2171d7 TH |
925 | if (first) |
926 | return true; | |
f23571e8 TH |
927 | tomoyo_print_name_union(head, &ptr->name); |
928 | } else if (head->r.print_execute_only) { | |
5db5a39b TH |
929 | return true; |
930 | } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) { | |
931 | struct tomoyo_path2_acl *ptr = | |
932 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 TH |
933 | const u8 perm = ptr->perm; |
934 | for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) { | |
935 | if (!(perm & (1 << bit))) | |
936 | continue; | |
937 | if (first) { | |
938 | tomoyo_set_group(head, "file "); | |
939 | first = false; | |
940 | } else { | |
941 | tomoyo_set_slash(head); | |
942 | } | |
943 | tomoyo_set_string(head, tomoyo_mac_keywords | |
944 | [tomoyo_pp2mac[bit]]); | |
945 | } | |
946 | if (first) | |
947 | return true; | |
f23571e8 TH |
948 | tomoyo_print_name_union(head, &ptr->name1); |
949 | tomoyo_print_name_union(head, &ptr->name2); | |
5db5a39b TH |
950 | } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) { |
951 | struct tomoyo_path_number_acl *ptr = | |
952 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 TH |
953 | const u8 perm = ptr->perm; |
954 | for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) { | |
955 | if (!(perm & (1 << bit))) | |
956 | continue; | |
957 | if (first) { | |
958 | tomoyo_set_group(head, "file "); | |
959 | first = false; | |
960 | } else { | |
961 | tomoyo_set_slash(head); | |
962 | } | |
963 | tomoyo_set_string(head, tomoyo_mac_keywords | |
964 | [tomoyo_pn2mac[bit]]); | |
965 | } | |
966 | if (first) | |
967 | return true; | |
f23571e8 TH |
968 | tomoyo_print_name_union(head, &ptr->name); |
969 | tomoyo_print_number_union(head, &ptr->number); | |
5db5a39b TH |
970 | } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) { |
971 | struct tomoyo_mkdev_acl *ptr = | |
972 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 TH |
973 | const u8 perm = ptr->perm; |
974 | for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) { | |
975 | if (!(perm & (1 << bit))) | |
976 | continue; | |
977 | if (first) { | |
978 | tomoyo_set_group(head, "file "); | |
979 | first = false; | |
980 | } else { | |
981 | tomoyo_set_slash(head); | |
982 | } | |
983 | tomoyo_set_string(head, tomoyo_mac_keywords | |
984 | [tomoyo_pnnn2mac[bit]]); | |
985 | } | |
986 | if (first) | |
987 | return true; | |
f23571e8 TH |
988 | tomoyo_print_name_union(head, &ptr->name); |
989 | tomoyo_print_number_union(head, &ptr->mode); | |
990 | tomoyo_print_number_union(head, &ptr->major); | |
991 | tomoyo_print_number_union(head, &ptr->minor); | |
5db5a39b TH |
992 | } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) { |
993 | struct tomoyo_mount_acl *ptr = | |
994 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 | 995 | tomoyo_set_group(head, "file mount"); |
f23571e8 TH |
996 | tomoyo_print_name_union(head, &ptr->dev_name); |
997 | tomoyo_print_name_union(head, &ptr->dir_name); | |
998 | tomoyo_print_name_union(head, &ptr->fs_type); | |
999 | tomoyo_print_number_union(head, &ptr->flags); | |
a1f9bb6a | 1000 | } |
0d2171d7 | 1001 | tomoyo_set_lf(head); |
f23571e8 TH |
1002 | return true; |
1003 | } | |
1004 | ||
1005 | /** | |
1006 | * tomoyo_read_domain2 - Read domain policy. | |
1007 | * | |
1008 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1009 | * @domain: Pointer to "struct tomoyo_domain_info". | |
1010 | * | |
1011 | * Caller holds tomoyo_read_lock(). | |
1012 | * | |
1013 | * Returns true on success, false otherwise. | |
1014 | */ | |
1015 | static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head, | |
1016 | struct tomoyo_domain_info *domain) | |
1017 | { | |
1018 | list_for_each_cookie(head->r.acl, &domain->acl_info_list) { | |
1019 | struct tomoyo_acl_info *ptr = | |
1020 | list_entry(head->r.acl, typeof(*ptr), list); | |
1021 | if (!tomoyo_print_entry(head, ptr)) | |
1022 | return false; | |
1023 | } | |
1024 | head->r.acl = NULL; | |
a1f9bb6a | 1025 | return true; |
a1f9bb6a TH |
1026 | } |
1027 | ||
9590837b | 1028 | /** |
e2bf6907 | 1029 | * tomoyo_read_domain - Read domain policy. |
9590837b KT |
1030 | * |
1031 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1032 | * | |
fdb8ebb7 | 1033 | * Caller holds tomoyo_read_lock(). |
9590837b | 1034 | */ |
e2bf6907 | 1035 | static void tomoyo_read_domain(struct tomoyo_io_buffer *head) |
9590837b | 1036 | { |
f23571e8 | 1037 | if (head->r.eof) |
8fbe71f0 | 1038 | return; |
f23571e8 | 1039 | list_for_each_cookie(head->r.domain, &tomoyo_domain_list) { |
475e6fa3 | 1040 | struct tomoyo_domain_info *domain = |
f23571e8 TH |
1041 | list_entry(head->r.domain, typeof(*domain), list); |
1042 | switch (head->r.step) { | |
1043 | case 0: | |
1044 | if (domain->is_deleted && | |
1045 | !head->r.print_this_domain_only) | |
1046 | continue; | |
1047 | /* Print domainname and flags. */ | |
1048 | tomoyo_set_string(head, domain->domainname->name); | |
1049 | tomoyo_set_lf(head); | |
b5bc60b4 | 1050 | tomoyo_io_printf(head, "use_profile %u\n", |
f23571e8 TH |
1051 | domain->profile); |
1052 | if (domain->quota_warned) | |
1053 | tomoyo_set_string(head, "quota_exceeded\n"); | |
1054 | if (domain->transition_failed) | |
1055 | tomoyo_set_string(head, "transition_failed\n"); | |
f23571e8 TH |
1056 | head->r.step++; |
1057 | tomoyo_set_lf(head); | |
1058 | /* fall through */ | |
1059 | case 1: | |
1060 | if (!tomoyo_read_domain2(head, domain)) | |
1061 | return; | |
1062 | head->r.step++; | |
1063 | if (!tomoyo_set_lf(head)) | |
1064 | return; | |
1065 | /* fall through */ | |
1066 | case 2: | |
1067 | head->r.step = 0; | |
1068 | if (head->r.print_this_domain_only) | |
1069 | goto done; | |
9590837b | 1070 | } |
9590837b | 1071 | } |
f23571e8 TH |
1072 | done: |
1073 | head->r.eof = true; | |
9590837b KT |
1074 | } |
1075 | ||
1076 | /** | |
1077 | * tomoyo_write_domain_profile - Assign profile for specified domain. | |
1078 | * | |
1079 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1080 | * | |
1081 | * Returns 0 on success, -EINVAL otherwise. | |
1082 | * | |
1083 | * This is equivalent to doing | |
1084 | * | |
1085 | * ( echo "select " $domainname; echo "use_profile " $profile ) | | |
9b244373 | 1086 | * /usr/sbin/tomoyo-loadpolicy -d |
fdb8ebb7 TH |
1087 | * |
1088 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1089 | */ |
1090 | static int tomoyo_write_domain_profile(struct tomoyo_io_buffer *head) | |
1091 | { | |
1092 | char *data = head->write_buf; | |
1093 | char *cp = strchr(data, ' '); | |
1094 | struct tomoyo_domain_info *domain; | |
1095 | unsigned long profile; | |
1096 | ||
1097 | if (!cp) | |
1098 | return -EINVAL; | |
1099 | *cp = '\0'; | |
9590837b | 1100 | domain = tomoyo_find_domain(cp + 1); |
9590837b KT |
1101 | if (strict_strtoul(data, 10, &profile)) |
1102 | return -EINVAL; | |
1103 | if (domain && profile < TOMOYO_MAX_PROFILES | |
1104 | && (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded)) | |
1105 | domain->profile = (u8) profile; | |
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | /** | |
1110 | * tomoyo_read_domain_profile - Read only domainname and profile. | |
1111 | * | |
1112 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1113 | * | |
1114 | * Returns list of profile number and domainname pairs. | |
1115 | * | |
1116 | * This is equivalent to doing | |
1117 | * | |
1118 | * grep -A 1 '^<kernel>' /sys/kernel/security/tomoyo/domain_policy | | |
1119 | * awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" ) | |
1120 | * domainname = $0; } else if ( $1 == "use_profile" ) { | |
1121 | * print $2 " " domainname; domainname = ""; } } ; ' | |
fdb8ebb7 TH |
1122 | * |
1123 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1124 | */ |
8fbe71f0 | 1125 | static void tomoyo_read_domain_profile(struct tomoyo_io_buffer *head) |
9590837b | 1126 | { |
f23571e8 | 1127 | if (head->r.eof) |
8fbe71f0 | 1128 | return; |
f23571e8 | 1129 | list_for_each_cookie(head->r.domain, &tomoyo_domain_list) { |
475e6fa3 | 1130 | struct tomoyo_domain_info *domain = |
f23571e8 | 1131 | list_entry(head->r.domain, typeof(*domain), list); |
9590837b KT |
1132 | if (domain->is_deleted) |
1133 | continue; | |
f23571e8 TH |
1134 | if (!tomoyo_flush(head)) |
1135 | return; | |
1136 | tomoyo_io_printf(head, "%u ", domain->profile); | |
1137 | tomoyo_set_string(head, domain->domainname->name); | |
1138 | tomoyo_set_lf(head); | |
9590837b | 1139 | } |
f23571e8 | 1140 | head->r.eof = true; |
9590837b KT |
1141 | } |
1142 | ||
1143 | /** | |
1144 | * tomoyo_write_pid: Specify PID to obtain domainname. | |
1145 | * | |
1146 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1147 | * | |
1148 | * Returns 0. | |
1149 | */ | |
1150 | static int tomoyo_write_pid(struct tomoyo_io_buffer *head) | |
1151 | { | |
f23571e8 | 1152 | head->r.eof = false; |
9590837b KT |
1153 | return 0; |
1154 | } | |
1155 | ||
1156 | /** | |
1157 | * tomoyo_read_pid - Get domainname of the specified PID. | |
1158 | * | |
1159 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1160 | * | |
1161 | * Returns the domainname which the specified PID is in on success, | |
1162 | * empty string otherwise. | |
1163 | * The PID is specified by tomoyo_write_pid() so that the user can obtain | |
1164 | * using read()/write() interface rather than sysctl() interface. | |
1165 | */ | |
8fbe71f0 | 1166 | static void tomoyo_read_pid(struct tomoyo_io_buffer *head) |
9590837b | 1167 | { |
f23571e8 TH |
1168 | char *buf = head->write_buf; |
1169 | bool global_pid = false; | |
1170 | unsigned int pid; | |
1171 | struct task_struct *p; | |
1172 | struct tomoyo_domain_info *domain = NULL; | |
1173 | ||
1174 | /* Accessing write_buf is safe because head->io_sem is held. */ | |
1175 | if (!buf) { | |
1176 | head->r.eof = true; | |
1177 | return; /* Do nothing if open(O_RDONLY). */ | |
9590837b | 1178 | } |
f23571e8 TH |
1179 | if (head->r.w_pos || head->r.eof) |
1180 | return; | |
1181 | head->r.eof = true; | |
1182 | if (tomoyo_str_starts(&buf, "global-pid ")) | |
1183 | global_pid = true; | |
1184 | pid = (unsigned int) simple_strtoul(buf, NULL, 10); | |
1185 | rcu_read_lock(); | |
1186 | read_lock(&tasklist_lock); | |
1187 | if (global_pid) | |
1188 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
1189 | else | |
1190 | p = find_task_by_vpid(pid); | |
1191 | if (p) | |
1192 | domain = tomoyo_real_domain(p); | |
1193 | read_unlock(&tasklist_lock); | |
1194 | rcu_read_unlock(); | |
1195 | if (!domain) | |
1196 | return; | |
1197 | tomoyo_io_printf(head, "%u %u ", pid, domain->profile); | |
1198 | tomoyo_set_string(head, domain->domainname->name); | |
9590837b KT |
1199 | } |
1200 | ||
5448ec4f | 1201 | static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = { |
b5bc60b4 TH |
1202 | [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain", |
1203 | [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain", | |
1204 | [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain", | |
1205 | [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain", | |
5448ec4f TH |
1206 | }; |
1207 | ||
e2bf6907 | 1208 | static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = { |
b5bc60b4 TH |
1209 | [TOMOYO_PATH_GROUP] = "path_group ", |
1210 | [TOMOYO_NUMBER_GROUP] = "number_group ", | |
e2bf6907 TH |
1211 | }; |
1212 | ||
9590837b | 1213 | /** |
e2bf6907 | 1214 | * tomoyo_write_exception - Write exception policy. |
9590837b KT |
1215 | * |
1216 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1217 | * | |
1218 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1219 | * |
1220 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1221 | */ |
e2bf6907 | 1222 | static int tomoyo_write_exception(struct tomoyo_io_buffer *head) |
9590837b | 1223 | { |
a238cf5b TH |
1224 | struct tomoyo_acl_param param = { |
1225 | .data = head->write_buf, | |
e2bf6907 | 1226 | }; |
a238cf5b TH |
1227 | u8 i; |
1228 | param.is_delete = tomoyo_str_starts(¶m.data, "delete "); | |
1229 | if (tomoyo_str_starts(¶m.data, "aggregator ")) | |
1230 | return tomoyo_write_aggregator(¶m); | |
e2bf6907 | 1231 | for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++) |
a238cf5b TH |
1232 | if (tomoyo_str_starts(¶m.data, tomoyo_transition_type[i])) |
1233 | return tomoyo_write_transition_control(¶m, i); | |
e2bf6907 | 1234 | for (i = 0; i < TOMOYO_MAX_GROUP; i++) |
a238cf5b TH |
1235 | if (tomoyo_str_starts(¶m.data, tomoyo_group_name[i])) |
1236 | return tomoyo_write_group(¶m, i); | |
9590837b KT |
1237 | return -EINVAL; |
1238 | } | |
1239 | ||
1240 | /** | |
31845e8c | 1241 | * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group" list. |
9590837b KT |
1242 | * |
1243 | * @head: Pointer to "struct tomoyo_io_buffer". | |
31845e8c TH |
1244 | * @idx: Index number. |
1245 | * | |
1246 | * Returns true on success, false otherwise. | |
9590837b | 1247 | * |
fdb8ebb7 | 1248 | * Caller holds tomoyo_read_lock(). |
9590837b | 1249 | */ |
31845e8c | 1250 | static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx) |
9590837b | 1251 | { |
f23571e8 | 1252 | list_for_each_cookie(head->r.group, &tomoyo_group_list[idx]) { |
31845e8c | 1253 | struct tomoyo_group *group = |
0df7e8b8 | 1254 | list_entry(head->r.group, typeof(*group), head.list); |
f23571e8 | 1255 | list_for_each_cookie(head->r.acl, &group->member_list) { |
31845e8c | 1256 | struct tomoyo_acl_head *ptr = |
f23571e8 | 1257 | list_entry(head->r.acl, typeof(*ptr), list); |
31845e8c TH |
1258 | if (ptr->is_deleted) |
1259 | continue; | |
f23571e8 TH |
1260 | if (!tomoyo_flush(head)) |
1261 | return false; | |
1262 | tomoyo_set_string(head, tomoyo_group_name[idx]); | |
1263 | tomoyo_set_string(head, group->group_name->name); | |
31845e8c | 1264 | if (idx == TOMOYO_PATH_GROUP) { |
f23571e8 TH |
1265 | tomoyo_set_space(head); |
1266 | tomoyo_set_string(head, container_of | |
1267 | (ptr, struct tomoyo_path_group, | |
1268 | head)->member_name->name); | |
31845e8c | 1269 | } else if (idx == TOMOYO_NUMBER_GROUP) { |
f23571e8 TH |
1270 | tomoyo_print_number_union(head, &container_of |
1271 | (ptr, | |
1272 | struct tomoyo_number_group, | |
1273 | head)->number); | |
31845e8c | 1274 | } |
f23571e8 | 1275 | tomoyo_set_lf(head); |
31845e8c | 1276 | } |
f23571e8 | 1277 | head->r.acl = NULL; |
31845e8c | 1278 | } |
f23571e8 | 1279 | head->r.group = NULL; |
31845e8c TH |
1280 | return true; |
1281 | } | |
1282 | ||
1283 | /** | |
1284 | * tomoyo_read_policy - Read "struct tomoyo_..._entry" list. | |
1285 | * | |
1286 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1287 | * @idx: Index number. | |
1288 | * | |
1289 | * Returns true on success, false otherwise. | |
1290 | * | |
1291 | * Caller holds tomoyo_read_lock(). | |
1292 | */ | |
1293 | static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx) | |
1294 | { | |
f23571e8 | 1295 | list_for_each_cookie(head->r.acl, &tomoyo_policy_list[idx]) { |
475e6fa3 | 1296 | struct tomoyo_acl_head *acl = |
f23571e8 | 1297 | container_of(head->r.acl, typeof(*acl), list); |
31845e8c TH |
1298 | if (acl->is_deleted) |
1299 | continue; | |
f23571e8 TH |
1300 | if (!tomoyo_flush(head)) |
1301 | return false; | |
31845e8c | 1302 | switch (idx) { |
5448ec4f | 1303 | case TOMOYO_ID_TRANSITION_CONTROL: |
31845e8c | 1304 | { |
5448ec4f | 1305 | struct tomoyo_transition_control *ptr = |
31845e8c | 1306 | container_of(acl, typeof(*ptr), head); |
0d2171d7 | 1307 | tomoyo_set_string(head, tomoyo_transition_type |
f23571e8 | 1308 | [ptr->type]); |
0d2171d7 TH |
1309 | tomoyo_set_string(head, ptr->program ? |
1310 | ptr->program->name : "any"); | |
1311 | tomoyo_set_string(head, " from "); | |
1312 | tomoyo_set_string(head, ptr->domainname ? | |
1313 | ptr->domainname->name : | |
1314 | "any"); | |
31845e8c TH |
1315 | } |
1316 | break; | |
31845e8c TH |
1317 | case TOMOYO_ID_AGGREGATOR: |
1318 | { | |
e2bf6907 | 1319 | struct tomoyo_aggregator *ptr = |
31845e8c | 1320 | container_of(acl, typeof(*ptr), head); |
b5bc60b4 | 1321 | tomoyo_set_string(head, "aggregator "); |
f23571e8 TH |
1322 | tomoyo_set_string(head, |
1323 | ptr->original_name->name); | |
1324 | tomoyo_set_space(head); | |
1325 | tomoyo_set_string(head, | |
1326 | ptr->aggregated_name->name); | |
31845e8c TH |
1327 | } |
1328 | break; | |
31845e8c TH |
1329 | default: |
1330 | continue; | |
9590837b | 1331 | } |
f23571e8 | 1332 | tomoyo_set_lf(head); |
9590837b | 1333 | } |
f23571e8 | 1334 | head->r.acl = NULL; |
31845e8c TH |
1335 | return true; |
1336 | } | |
1337 | ||
1338 | /** | |
e2bf6907 | 1339 | * tomoyo_read_exception - Read exception policy. |
31845e8c TH |
1340 | * |
1341 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1342 | * | |
1343 | * Caller holds tomoyo_read_lock(). | |
1344 | */ | |
e2bf6907 | 1345 | static void tomoyo_read_exception(struct tomoyo_io_buffer *head) |
31845e8c | 1346 | { |
f23571e8 | 1347 | if (head->r.eof) |
31845e8c | 1348 | return; |
f23571e8 TH |
1349 | while (head->r.step < TOMOYO_MAX_POLICY && |
1350 | tomoyo_read_policy(head, head->r.step)) | |
1351 | head->r.step++; | |
1352 | if (head->r.step < TOMOYO_MAX_POLICY) | |
31845e8c | 1353 | return; |
f23571e8 TH |
1354 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP && |
1355 | tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY)) | |
1356 | head->r.step++; | |
1357 | if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP) | |
31845e8c | 1358 | return; |
f23571e8 | 1359 | head->r.eof = true; |
9590837b KT |
1360 | } |
1361 | ||
17fcfbd9 TH |
1362 | /** |
1363 | * tomoyo_print_header - Get header line of audit log. | |
1364 | * | |
1365 | * @r: Pointer to "struct tomoyo_request_info". | |
1366 | * | |
1367 | * Returns string representation. | |
1368 | * | |
1369 | * This function uses kmalloc(), so caller must kfree() if this function | |
1370 | * didn't return NULL. | |
1371 | */ | |
1372 | static char *tomoyo_print_header(struct tomoyo_request_info *r) | |
1373 | { | |
17fcfbd9 TH |
1374 | struct timeval tv; |
1375 | const pid_t gpid = task_pid_nr(current); | |
1376 | static const int tomoyo_buffer_len = 4096; | |
1377 | char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS); | |
c8da96e8 | 1378 | pid_t ppid; |
17fcfbd9 TH |
1379 | if (!buffer) |
1380 | return NULL; | |
1381 | do_gettimeofday(&tv); | |
c8da96e8 BH |
1382 | rcu_read_lock(); |
1383 | ppid = task_tgid_vnr(current->real_parent); | |
1384 | rcu_read_unlock(); | |
17fcfbd9 TH |
1385 | snprintf(buffer, tomoyo_buffer_len - 1, |
1386 | "#timestamp=%lu profile=%u mode=%s (global-pid=%u)" | |
1387 | " task={ pid=%u ppid=%u uid=%u gid=%u euid=%u" | |
1388 | " egid=%u suid=%u sgid=%u fsuid=%u fsgid=%u }", | |
f23571e8 | 1389 | tv.tv_sec, r->profile, tomoyo_mode[r->mode], gpid, |
c8da96e8 | 1390 | task_tgid_vnr(current), ppid, |
17fcfbd9 TH |
1391 | current_uid(), current_gid(), current_euid(), |
1392 | current_egid(), current_suid(), current_sgid(), | |
1393 | current_fsuid(), current_fsgid()); | |
1394 | return buffer; | |
1395 | } | |
1396 | ||
1397 | /** | |
1398 | * tomoyo_init_audit_log - Allocate buffer for audit logs. | |
1399 | * | |
1400 | * @len: Required size. | |
1401 | * @r: Pointer to "struct tomoyo_request_info". | |
1402 | * | |
1403 | * Returns pointer to allocated memory. | |
1404 | * | |
1405 | * The @len is updated to add the header lines' size on success. | |
1406 | * | |
1407 | * This function uses kzalloc(), so caller must kfree() if this function | |
1408 | * didn't return NULL. | |
1409 | */ | |
1410 | static char *tomoyo_init_audit_log(int *len, struct tomoyo_request_info *r) | |
1411 | { | |
1412 | char *buf = NULL; | |
1413 | const char *header; | |
1414 | const char *domainname; | |
1415 | if (!r->domain) | |
1416 | r->domain = tomoyo_domain(); | |
1417 | domainname = r->domain->domainname->name; | |
1418 | header = tomoyo_print_header(r); | |
1419 | if (!header) | |
1420 | return NULL; | |
1421 | *len += strlen(domainname) + strlen(header) + 10; | |
1422 | buf = kzalloc(*len, GFP_NOFS); | |
1423 | if (buf) | |
1424 | snprintf(buf, (*len) - 1, "%s\n%s\n", header, domainname); | |
1425 | kfree(header); | |
1426 | return buf; | |
1427 | } | |
1428 | ||
1429 | /* Wait queue for tomoyo_query_list. */ | |
1430 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait); | |
1431 | ||
1432 | /* Lock for manipulating tomoyo_query_list. */ | |
1433 | static DEFINE_SPINLOCK(tomoyo_query_list_lock); | |
1434 | ||
1435 | /* Structure for query. */ | |
e2bf6907 | 1436 | struct tomoyo_query { |
17fcfbd9 TH |
1437 | struct list_head list; |
1438 | char *query; | |
1439 | int query_len; | |
1440 | unsigned int serial; | |
1441 | int timer; | |
1442 | int answer; | |
1443 | }; | |
1444 | ||
e2bf6907 | 1445 | /* The list for "struct tomoyo_query". */ |
17fcfbd9 TH |
1446 | static LIST_HEAD(tomoyo_query_list); |
1447 | ||
1448 | /* | |
1449 | * Number of "struct file" referring /sys/kernel/security/tomoyo/query | |
1450 | * interface. | |
1451 | */ | |
1452 | static atomic_t tomoyo_query_observers = ATOMIC_INIT(0); | |
1453 | ||
1454 | /** | |
1455 | * tomoyo_supervisor - Ask for the supervisor's decision. | |
1456 | * | |
1457 | * @r: Pointer to "struct tomoyo_request_info". | |
1458 | * @fmt: The printf()'s format string, followed by parameters. | |
1459 | * | |
1460 | * Returns 0 if the supervisor decided to permit the access request which | |
1461 | * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the | |
1462 | * supervisor decided to retry the access request which violated the policy in | |
1463 | * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise. | |
1464 | */ | |
1465 | int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...) | |
1466 | { | |
1467 | va_list args; | |
1468 | int error = -EPERM; | |
1469 | int pos; | |
1470 | int len; | |
1471 | static unsigned int tomoyo_serial; | |
e2bf6907 | 1472 | struct tomoyo_query *entry = NULL; |
17fcfbd9 TH |
1473 | bool quota_exceeded = false; |
1474 | char *header; | |
1475 | switch (r->mode) { | |
1476 | char *buffer; | |
1477 | case TOMOYO_CONFIG_LEARNING: | |
1478 | if (!tomoyo_domain_quota_is_ok(r)) | |
1479 | return 0; | |
1480 | va_start(args, fmt); | |
1481 | len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 4; | |
1482 | va_end(args); | |
1483 | buffer = kmalloc(len, GFP_NOFS); | |
1484 | if (!buffer) | |
1485 | return 0; | |
1486 | va_start(args, fmt); | |
1487 | vsnprintf(buffer, len - 1, fmt, args); | |
1488 | va_end(args); | |
1489 | tomoyo_normalize_line(buffer); | |
a238cf5b | 1490 | tomoyo_write_domain2(&r->domain->acl_info_list, buffer, false); |
17fcfbd9 TH |
1491 | kfree(buffer); |
1492 | /* fall through */ | |
1493 | case TOMOYO_CONFIG_PERMISSIVE: | |
1494 | return 0; | |
1495 | } | |
1496 | if (!r->domain) | |
1497 | r->domain = tomoyo_domain(); | |
1498 | if (!atomic_read(&tomoyo_query_observers)) | |
1499 | return -EPERM; | |
1500 | va_start(args, fmt); | |
1501 | len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 32; | |
1502 | va_end(args); | |
1503 | header = tomoyo_init_audit_log(&len, r); | |
1504 | if (!header) | |
1505 | goto out; | |
e2bf6907 TH |
1506 | entry = kzalloc(sizeof(*entry), GFP_NOFS); |
1507 | if (!entry) | |
17fcfbd9 | 1508 | goto out; |
e2bf6907 TH |
1509 | entry->query = kzalloc(len, GFP_NOFS); |
1510 | if (!entry->query) | |
17fcfbd9 | 1511 | goto out; |
e2bf6907 | 1512 | len = ksize(entry->query); |
17fcfbd9 TH |
1513 | spin_lock(&tomoyo_query_list_lock); |
1514 | if (tomoyo_quota_for_query && tomoyo_query_memory_size + len + | |
e2bf6907 | 1515 | sizeof(*entry) >= tomoyo_quota_for_query) { |
17fcfbd9 TH |
1516 | quota_exceeded = true; |
1517 | } else { | |
e2bf6907 TH |
1518 | tomoyo_query_memory_size += len + sizeof(*entry); |
1519 | entry->serial = tomoyo_serial++; | |
17fcfbd9 TH |
1520 | } |
1521 | spin_unlock(&tomoyo_query_list_lock); | |
1522 | if (quota_exceeded) | |
1523 | goto out; | |
e2bf6907 TH |
1524 | pos = snprintf(entry->query, len - 1, "Q%u-%hu\n%s", |
1525 | entry->serial, r->retry, header); | |
17fcfbd9 TH |
1526 | kfree(header); |
1527 | header = NULL; | |
1528 | va_start(args, fmt); | |
e2bf6907 TH |
1529 | vsnprintf(entry->query + pos, len - 1 - pos, fmt, args); |
1530 | entry->query_len = strlen(entry->query) + 1; | |
17fcfbd9 TH |
1531 | va_end(args); |
1532 | spin_lock(&tomoyo_query_list_lock); | |
e2bf6907 | 1533 | list_add_tail(&entry->list, &tomoyo_query_list); |
17fcfbd9 TH |
1534 | spin_unlock(&tomoyo_query_list_lock); |
1535 | /* Give 10 seconds for supervisor's opinion. */ | |
e2bf6907 TH |
1536 | for (entry->timer = 0; |
1537 | atomic_read(&tomoyo_query_observers) && entry->timer < 100; | |
1538 | entry->timer++) { | |
17fcfbd9 TH |
1539 | wake_up(&tomoyo_query_wait); |
1540 | set_current_state(TASK_INTERRUPTIBLE); | |
1541 | schedule_timeout(HZ / 10); | |
e2bf6907 | 1542 | if (entry->answer) |
17fcfbd9 TH |
1543 | break; |
1544 | } | |
1545 | spin_lock(&tomoyo_query_list_lock); | |
e2bf6907 TH |
1546 | list_del(&entry->list); |
1547 | tomoyo_query_memory_size -= len + sizeof(*entry); | |
17fcfbd9 | 1548 | spin_unlock(&tomoyo_query_list_lock); |
e2bf6907 | 1549 | switch (entry->answer) { |
17fcfbd9 TH |
1550 | case 3: /* Asked to retry by administrator. */ |
1551 | error = TOMOYO_RETRY_REQUEST; | |
1552 | r->retry++; | |
1553 | break; | |
1554 | case 1: | |
1555 | /* Granted by administrator. */ | |
1556 | error = 0; | |
1557 | break; | |
1558 | case 0: | |
1559 | /* Timed out. */ | |
1560 | break; | |
1561 | default: | |
1562 | /* Rejected by administrator. */ | |
1563 | break; | |
1564 | } | |
1565 | out: | |
e2bf6907 TH |
1566 | if (entry) |
1567 | kfree(entry->query); | |
1568 | kfree(entry); | |
17fcfbd9 TH |
1569 | kfree(header); |
1570 | return error; | |
1571 | } | |
1572 | ||
1573 | /** | |
1574 | * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query. | |
1575 | * | |
1576 | * @file: Pointer to "struct file". | |
1577 | * @wait: Pointer to "poll_table". | |
1578 | * | |
1579 | * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise. | |
1580 | * | |
1581 | * Waits for access requests which violated policy in enforcing mode. | |
1582 | */ | |
1583 | static int tomoyo_poll_query(struct file *file, poll_table *wait) | |
1584 | { | |
1585 | struct list_head *tmp; | |
1586 | bool found = false; | |
1587 | u8 i; | |
1588 | for (i = 0; i < 2; i++) { | |
1589 | spin_lock(&tomoyo_query_list_lock); | |
1590 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 TH |
1591 | struct tomoyo_query *ptr = |
1592 | list_entry(tmp, typeof(*ptr), list); | |
17fcfbd9 TH |
1593 | if (ptr->answer) |
1594 | continue; | |
1595 | found = true; | |
1596 | break; | |
1597 | } | |
1598 | spin_unlock(&tomoyo_query_list_lock); | |
1599 | if (found) | |
1600 | return POLLIN | POLLRDNORM; | |
1601 | if (i) | |
1602 | break; | |
1603 | poll_wait(file, &tomoyo_query_wait, wait); | |
1604 | } | |
1605 | return 0; | |
1606 | } | |
1607 | ||
1608 | /** | |
1609 | * tomoyo_read_query - Read access requests which violated policy in enforcing mode. | |
1610 | * | |
1611 | * @head: Pointer to "struct tomoyo_io_buffer". | |
17fcfbd9 | 1612 | */ |
8fbe71f0 | 1613 | static void tomoyo_read_query(struct tomoyo_io_buffer *head) |
17fcfbd9 TH |
1614 | { |
1615 | struct list_head *tmp; | |
1616 | int pos = 0; | |
1617 | int len = 0; | |
1618 | char *buf; | |
f23571e8 | 1619 | if (head->r.w_pos) |
8fbe71f0 | 1620 | return; |
17fcfbd9 TH |
1621 | if (head->read_buf) { |
1622 | kfree(head->read_buf); | |
1623 | head->read_buf = NULL; | |
17fcfbd9 TH |
1624 | } |
1625 | spin_lock(&tomoyo_query_list_lock); | |
1626 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 1627 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
17fcfbd9 TH |
1628 | if (ptr->answer) |
1629 | continue; | |
f23571e8 | 1630 | if (pos++ != head->r.query_index) |
17fcfbd9 TH |
1631 | continue; |
1632 | len = ptr->query_len; | |
1633 | break; | |
1634 | } | |
1635 | spin_unlock(&tomoyo_query_list_lock); | |
1636 | if (!len) { | |
f23571e8 | 1637 | head->r.query_index = 0; |
8fbe71f0 | 1638 | return; |
17fcfbd9 TH |
1639 | } |
1640 | buf = kzalloc(len, GFP_NOFS); | |
1641 | if (!buf) | |
8fbe71f0 | 1642 | return; |
17fcfbd9 TH |
1643 | pos = 0; |
1644 | spin_lock(&tomoyo_query_list_lock); | |
1645 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 1646 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
17fcfbd9 TH |
1647 | if (ptr->answer) |
1648 | continue; | |
f23571e8 | 1649 | if (pos++ != head->r.query_index) |
17fcfbd9 TH |
1650 | continue; |
1651 | /* | |
1652 | * Some query can be skipped because tomoyo_query_list | |
1653 | * can change, but I don't care. | |
1654 | */ | |
1655 | if (len == ptr->query_len) | |
1656 | memmove(buf, ptr->query, len); | |
1657 | break; | |
1658 | } | |
1659 | spin_unlock(&tomoyo_query_list_lock); | |
1660 | if (buf[0]) { | |
17fcfbd9 | 1661 | head->read_buf = buf; |
f23571e8 TH |
1662 | head->r.w[head->r.w_pos++] = buf; |
1663 | head->r.query_index++; | |
17fcfbd9 TH |
1664 | } else { |
1665 | kfree(buf); | |
1666 | } | |
17fcfbd9 TH |
1667 | } |
1668 | ||
1669 | /** | |
1670 | * tomoyo_write_answer - Write the supervisor's decision. | |
1671 | * | |
1672 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1673 | * | |
1674 | * Returns 0 on success, -EINVAL otherwise. | |
1675 | */ | |
1676 | static int tomoyo_write_answer(struct tomoyo_io_buffer *head) | |
1677 | { | |
1678 | char *data = head->write_buf; | |
1679 | struct list_head *tmp; | |
1680 | unsigned int serial; | |
1681 | unsigned int answer; | |
1682 | spin_lock(&tomoyo_query_list_lock); | |
1683 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 1684 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
17fcfbd9 TH |
1685 | ptr->timer = 0; |
1686 | } | |
1687 | spin_unlock(&tomoyo_query_list_lock); | |
1688 | if (sscanf(data, "A%u=%u", &serial, &answer) != 2) | |
1689 | return -EINVAL; | |
1690 | spin_lock(&tomoyo_query_list_lock); | |
1691 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 1692 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
17fcfbd9 TH |
1693 | if (ptr->serial != serial) |
1694 | continue; | |
1695 | if (!ptr->answer) | |
1696 | ptr->answer = answer; | |
1697 | break; | |
1698 | } | |
1699 | spin_unlock(&tomoyo_query_list_lock); | |
1700 | return 0; | |
1701 | } | |
1702 | ||
9590837b KT |
1703 | /** |
1704 | * tomoyo_read_version: Get version. | |
1705 | * | |
1706 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1707 | * | |
1708 | * Returns version information. | |
1709 | */ | |
8fbe71f0 | 1710 | static void tomoyo_read_version(struct tomoyo_io_buffer *head) |
9590837b | 1711 | { |
f23571e8 | 1712 | if (!head->r.eof) { |
d5ca1725 | 1713 | tomoyo_io_printf(head, "2.4.0"); |
f23571e8 | 1714 | head->r.eof = true; |
9590837b | 1715 | } |
9590837b KT |
1716 | } |
1717 | ||
1718 | /** | |
1719 | * tomoyo_read_self_domain - Get the current process's domainname. | |
1720 | * | |
1721 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1722 | * | |
1723 | * Returns the current process's domainname. | |
1724 | */ | |
8fbe71f0 | 1725 | static void tomoyo_read_self_domain(struct tomoyo_io_buffer *head) |
9590837b | 1726 | { |
f23571e8 | 1727 | if (!head->r.eof) { |
9590837b KT |
1728 | /* |
1729 | * tomoyo_domain()->domainname != NULL | |
1730 | * because every process belongs to a domain and | |
1731 | * the domain's name cannot be NULL. | |
1732 | */ | |
1733 | tomoyo_io_printf(head, "%s", tomoyo_domain()->domainname->name); | |
f23571e8 | 1734 | head->r.eof = true; |
9590837b | 1735 | } |
9590837b KT |
1736 | } |
1737 | ||
1738 | /** | |
1739 | * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface. | |
1740 | * | |
1741 | * @type: Type of interface. | |
1742 | * @file: Pointer to "struct file". | |
1743 | * | |
1744 | * Associates policy handler and returns 0 on success, -ENOMEM otherwise. | |
fdb8ebb7 TH |
1745 | * |
1746 | * Caller acquires tomoyo_read_lock(). | |
9590837b | 1747 | */ |
c3ef1500 | 1748 | int tomoyo_open_control(const u8 type, struct file *file) |
9590837b | 1749 | { |
4e5d6f7e | 1750 | struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS); |
9590837b KT |
1751 | |
1752 | if (!head) | |
1753 | return -ENOMEM; | |
1754 | mutex_init(&head->io_sem); | |
17fcfbd9 | 1755 | head->type = type; |
9590837b KT |
1756 | switch (type) { |
1757 | case TOMOYO_DOMAINPOLICY: | |
1758 | /* /sys/kernel/security/tomoyo/domain_policy */ | |
e2bf6907 TH |
1759 | head->write = tomoyo_write_domain; |
1760 | head->read = tomoyo_read_domain; | |
9590837b KT |
1761 | break; |
1762 | case TOMOYO_EXCEPTIONPOLICY: | |
1763 | /* /sys/kernel/security/tomoyo/exception_policy */ | |
e2bf6907 TH |
1764 | head->write = tomoyo_write_exception; |
1765 | head->read = tomoyo_read_exception; | |
9590837b KT |
1766 | break; |
1767 | case TOMOYO_SELFDOMAIN: | |
1768 | /* /sys/kernel/security/tomoyo/self_domain */ | |
1769 | head->read = tomoyo_read_self_domain; | |
1770 | break; | |
1771 | case TOMOYO_DOMAIN_STATUS: | |
1772 | /* /sys/kernel/security/tomoyo/.domain_status */ | |
1773 | head->write = tomoyo_write_domain_profile; | |
1774 | head->read = tomoyo_read_domain_profile; | |
1775 | break; | |
1776 | case TOMOYO_PROCESS_STATUS: | |
1777 | /* /sys/kernel/security/tomoyo/.process_status */ | |
1778 | head->write = tomoyo_write_pid; | |
1779 | head->read = tomoyo_read_pid; | |
1780 | break; | |
1781 | case TOMOYO_VERSION: | |
1782 | /* /sys/kernel/security/tomoyo/version */ | |
1783 | head->read = tomoyo_read_version; | |
1784 | head->readbuf_size = 128; | |
1785 | break; | |
1786 | case TOMOYO_MEMINFO: | |
1787 | /* /sys/kernel/security/tomoyo/meminfo */ | |
1788 | head->write = tomoyo_write_memory_quota; | |
1789 | head->read = tomoyo_read_memory_counter; | |
1790 | head->readbuf_size = 512; | |
1791 | break; | |
1792 | case TOMOYO_PROFILE: | |
1793 | /* /sys/kernel/security/tomoyo/profile */ | |
1794 | head->write = tomoyo_write_profile; | |
1795 | head->read = tomoyo_read_profile; | |
1796 | break; | |
17fcfbd9 TH |
1797 | case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */ |
1798 | head->poll = tomoyo_poll_query; | |
1799 | head->write = tomoyo_write_answer; | |
1800 | head->read = tomoyo_read_query; | |
1801 | break; | |
9590837b KT |
1802 | case TOMOYO_MANAGER: |
1803 | /* /sys/kernel/security/tomoyo/manager */ | |
e2bf6907 TH |
1804 | head->write = tomoyo_write_manager; |
1805 | head->read = tomoyo_read_manager; | |
9590837b KT |
1806 | break; |
1807 | } | |
1808 | if (!(file->f_mode & FMODE_READ)) { | |
1809 | /* | |
1810 | * No need to allocate read_buf since it is not opened | |
1811 | * for reading. | |
1812 | */ | |
1813 | head->read = NULL; | |
17fcfbd9 TH |
1814 | head->poll = NULL; |
1815 | } else if (!head->poll) { | |
1816 | /* Don't allocate read_buf for poll() access. */ | |
9590837b KT |
1817 | if (!head->readbuf_size) |
1818 | head->readbuf_size = 4096 * 2; | |
4e5d6f7e | 1819 | head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS); |
9590837b | 1820 | if (!head->read_buf) { |
8e2d39a1 | 1821 | kfree(head); |
9590837b KT |
1822 | return -ENOMEM; |
1823 | } | |
1824 | } | |
1825 | if (!(file->f_mode & FMODE_WRITE)) { | |
1826 | /* | |
1827 | * No need to allocate write_buf since it is not opened | |
1828 | * for writing. | |
1829 | */ | |
1830 | head->write = NULL; | |
1831 | } else if (head->write) { | |
1832 | head->writebuf_size = 4096 * 2; | |
4e5d6f7e | 1833 | head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS); |
9590837b | 1834 | if (!head->write_buf) { |
8e2d39a1 TH |
1835 | kfree(head->read_buf); |
1836 | kfree(head); | |
9590837b KT |
1837 | return -ENOMEM; |
1838 | } | |
1839 | } | |
17fcfbd9 TH |
1840 | if (type != TOMOYO_QUERY) |
1841 | head->reader_idx = tomoyo_read_lock(); | |
9590837b | 1842 | file->private_data = head; |
17fcfbd9 TH |
1843 | /* |
1844 | * If the file is /sys/kernel/security/tomoyo/query , increment the | |
1845 | * observer counter. | |
1846 | * The obserber counter is used by tomoyo_supervisor() to see if | |
1847 | * there is some process monitoring /sys/kernel/security/tomoyo/query. | |
1848 | */ | |
7c75964f | 1849 | if (type == TOMOYO_QUERY) |
17fcfbd9 | 1850 | atomic_inc(&tomoyo_query_observers); |
9590837b KT |
1851 | return 0; |
1852 | } | |
1853 | ||
0849e3ba TH |
1854 | /** |
1855 | * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface. | |
1856 | * | |
1857 | * @file: Pointer to "struct file". | |
1858 | * @wait: Pointer to "poll_table". | |
1859 | * | |
1860 | * Waits for read readiness. | |
1861 | * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd . | |
1862 | */ | |
1863 | int tomoyo_poll_control(struct file *file, poll_table *wait) | |
1864 | { | |
1865 | struct tomoyo_io_buffer *head = file->private_data; | |
1866 | if (!head->poll) | |
1867 | return -ENOSYS; | |
1868 | return head->poll(file, wait); | |
1869 | } | |
1870 | ||
9590837b KT |
1871 | /** |
1872 | * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface. | |
1873 | * | |
0df7e8b8 | 1874 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b KT |
1875 | * @buffer: Poiner to buffer to write to. |
1876 | * @buffer_len: Size of @buffer. | |
1877 | * | |
1878 | * Returns bytes read on success, negative value otherwise. | |
fdb8ebb7 TH |
1879 | * |
1880 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1881 | */ |
0df7e8b8 | 1882 | int tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer, |
c3ef1500 | 1883 | const int buffer_len) |
9590837b | 1884 | { |
f23571e8 | 1885 | int len; |
9590837b KT |
1886 | |
1887 | if (!head->read) | |
1888 | return -ENOSYS; | |
1889 | if (mutex_lock_interruptible(&head->io_sem)) | |
1890 | return -EINTR; | |
f23571e8 TH |
1891 | head->read_user_buf = buffer; |
1892 | head->read_user_buf_avail = buffer_len; | |
1893 | if (tomoyo_flush(head)) | |
1894 | /* Call the policy handler. */ | |
1895 | head->read(head); | |
1896 | tomoyo_flush(head); | |
1897 | len = head->read_user_buf - buffer; | |
9590837b KT |
1898 | mutex_unlock(&head->io_sem); |
1899 | return len; | |
1900 | } | |
1901 | ||
1902 | /** | |
1903 | * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface. | |
1904 | * | |
0df7e8b8 | 1905 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b KT |
1906 | * @buffer: Pointer to buffer to read from. |
1907 | * @buffer_len: Size of @buffer. | |
1908 | * | |
1909 | * Returns @buffer_len on success, negative value otherwise. | |
fdb8ebb7 TH |
1910 | * |
1911 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1912 | */ |
0df7e8b8 TH |
1913 | int tomoyo_write_control(struct tomoyo_io_buffer *head, |
1914 | const char __user *buffer, const int buffer_len) | |
9590837b | 1915 | { |
9590837b KT |
1916 | int error = buffer_len; |
1917 | int avail_len = buffer_len; | |
1918 | char *cp0 = head->write_buf; | |
1919 | ||
1920 | if (!head->write) | |
1921 | return -ENOSYS; | |
1922 | if (!access_ok(VERIFY_READ, buffer, buffer_len)) | |
1923 | return -EFAULT; | |
1924 | /* Don't allow updating policies by non manager programs. */ | |
1925 | if (head->write != tomoyo_write_pid && | |
e2bf6907 | 1926 | head->write != tomoyo_write_domain && !tomoyo_manager()) |
9590837b KT |
1927 | return -EPERM; |
1928 | if (mutex_lock_interruptible(&head->io_sem)) | |
1929 | return -EINTR; | |
1930 | /* Read a line and dispatch it to the policy handler. */ | |
1931 | while (avail_len > 0) { | |
1932 | char c; | |
0df7e8b8 | 1933 | if (head->w.avail >= head->writebuf_size - 1) { |
9590837b KT |
1934 | error = -ENOMEM; |
1935 | break; | |
1936 | } else if (get_user(c, buffer)) { | |
1937 | error = -EFAULT; | |
1938 | break; | |
1939 | } | |
1940 | buffer++; | |
1941 | avail_len--; | |
0df7e8b8 | 1942 | cp0[head->w.avail++] = c; |
9590837b KT |
1943 | if (c != '\n') |
1944 | continue; | |
0df7e8b8 TH |
1945 | cp0[head->w.avail - 1] = '\0'; |
1946 | head->w.avail = 0; | |
9590837b KT |
1947 | tomoyo_normalize_line(cp0); |
1948 | head->write(head); | |
1949 | } | |
1950 | mutex_unlock(&head->io_sem); | |
1951 | return error; | |
1952 | } | |
1953 | ||
1954 | /** | |
1955 | * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface. | |
1956 | * | |
0df7e8b8 | 1957 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b KT |
1958 | * |
1959 | * Releases memory and returns 0. | |
fdb8ebb7 TH |
1960 | * |
1961 | * Caller looses tomoyo_read_lock(). | |
9590837b | 1962 | */ |
0df7e8b8 | 1963 | int tomoyo_close_control(struct tomoyo_io_buffer *head) |
9590837b | 1964 | { |
847b173e | 1965 | const bool is_write = !!head->write_buf; |
9590837b | 1966 | |
17fcfbd9 TH |
1967 | /* |
1968 | * If the file is /sys/kernel/security/tomoyo/query , decrement the | |
1969 | * observer counter. | |
1970 | */ | |
1971 | if (head->type == TOMOYO_QUERY) | |
1972 | atomic_dec(&tomoyo_query_observers); | |
1973 | else | |
1974 | tomoyo_read_unlock(head->reader_idx); | |
9590837b | 1975 | /* Release memory used for policy I/O. */ |
8e2d39a1 | 1976 | kfree(head->read_buf); |
9590837b | 1977 | head->read_buf = NULL; |
8e2d39a1 | 1978 | kfree(head->write_buf); |
9590837b | 1979 | head->write_buf = NULL; |
8e2d39a1 | 1980 | kfree(head); |
847b173e TH |
1981 | if (is_write) |
1982 | tomoyo_run_gc(); | |
9590837b KT |
1983 | return 0; |
1984 | } | |
1985 | ||
9590837b | 1986 | /** |
c3ef1500 | 1987 | * tomoyo_check_profile - Check all profiles currently assigned to domains are defined. |
9590837b | 1988 | */ |
c3ef1500 | 1989 | void tomoyo_check_profile(void) |
9590837b | 1990 | { |
c3ef1500 TH |
1991 | struct tomoyo_domain_info *domain; |
1992 | const int idx = tomoyo_read_lock(); | |
1993 | tomoyo_policy_loaded = true; | |
1994 | /* Check all profiles currently assigned to domains are defined. */ | |
1995 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { | |
1996 | const u8 profile = domain->profile; | |
1997 | if (tomoyo_profile_ptr[profile]) | |
1998 | continue; | |
9f1c1d42 TH |
1999 | printk(KERN_ERR "You need to define profile %u before using it.\n", |
2000 | profile); | |
2001 | printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/2.3/ " | |
2002 | "for more information.\n"); | |
c3ef1500 TH |
2003 | panic("Profile %u (used by '%s') not defined.\n", |
2004 | profile, domain->domainname->name); | |
2005 | } | |
2006 | tomoyo_read_unlock(idx); | |
9f1c1d42 TH |
2007 | if (tomoyo_profile_version != 20090903) { |
2008 | printk(KERN_ERR "You need to install userland programs for " | |
2009 | "TOMOYO 2.3 and initialize policy configuration.\n"); | |
2010 | printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/2.3/ " | |
2011 | "for more information.\n"); | |
57c2590f TH |
2012 | panic("Profile version %u is not supported.\n", |
2013 | tomoyo_profile_version); | |
9f1c1d42 | 2014 | } |
e6f6a4cc | 2015 | printk(KERN_INFO "TOMOYO: 2.3.0\n"); |
c3ef1500 | 2016 | printk(KERN_INFO "Mandatory Access Control activated.\n"); |
9590837b | 2017 | } |