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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 | static struct tomoyo_profile tomoyo_default_profile = { |
15 | .learning = &tomoyo_default_profile.preference, | |
16 | .permissive = &tomoyo_default_profile.preference, | |
17 | .enforcing = &tomoyo_default_profile.preference, | |
18 | .preference.enforcing_verbose = true, | |
19 | .preference.learning_max_entry = 2048, | |
20 | .preference.learning_verbose = false, | |
21 | .preference.permissive_verbose = true | |
22 | }; | |
23 | ||
24 | /* Profile version. Currently only 20090903 is defined. */ | |
25 | static unsigned int tomoyo_profile_version; | |
26 | ||
27 | /* Profile table. Memory is allocated as needed. */ | |
28 | static struct tomoyo_profile *tomoyo_profile_ptr[TOMOYO_MAX_PROFILES]; | |
29 | ||
9590837b | 30 | /* String table for functionality that takes 4 modes. */ |
f23571e8 | 31 | static const char *tomoyo_mode[4] = { |
9590837b KT |
32 | "disabled", "learning", "permissive", "enforcing" |
33 | }; | |
9590837b | 34 | |
57c2590f TH |
35 | /* String table for /sys/kernel/security/tomoyo/profile */ |
36 | static const char *tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX | |
37 | + TOMOYO_MAX_MAC_CATEGORY_INDEX] = { | |
38 | [TOMOYO_MAC_FILE_EXECUTE] = "file::execute", | |
39 | [TOMOYO_MAC_FILE_OPEN] = "file::open", | |
40 | [TOMOYO_MAC_FILE_CREATE] = "file::create", | |
41 | [TOMOYO_MAC_FILE_UNLINK] = "file::unlink", | |
42 | [TOMOYO_MAC_FILE_MKDIR] = "file::mkdir", | |
43 | [TOMOYO_MAC_FILE_RMDIR] = "file::rmdir", | |
44 | [TOMOYO_MAC_FILE_MKFIFO] = "file::mkfifo", | |
45 | [TOMOYO_MAC_FILE_MKSOCK] = "file::mksock", | |
46 | [TOMOYO_MAC_FILE_TRUNCATE] = "file::truncate", | |
47 | [TOMOYO_MAC_FILE_SYMLINK] = "file::symlink", | |
48 | [TOMOYO_MAC_FILE_REWRITE] = "file::rewrite", | |
49 | [TOMOYO_MAC_FILE_MKBLOCK] = "file::mkblock", | |
50 | [TOMOYO_MAC_FILE_MKCHAR] = "file::mkchar", | |
51 | [TOMOYO_MAC_FILE_LINK] = "file::link", | |
52 | [TOMOYO_MAC_FILE_RENAME] = "file::rename", | |
53 | [TOMOYO_MAC_FILE_CHMOD] = "file::chmod", | |
54 | [TOMOYO_MAC_FILE_CHOWN] = "file::chown", | |
55 | [TOMOYO_MAC_FILE_CHGRP] = "file::chgrp", | |
56 | [TOMOYO_MAC_FILE_IOCTL] = "file::ioctl", | |
57 | [TOMOYO_MAC_FILE_CHROOT] = "file::chroot", | |
58 | [TOMOYO_MAC_FILE_MOUNT] = "file::mount", | |
59 | [TOMOYO_MAC_FILE_UMOUNT] = "file::umount", | |
60 | [TOMOYO_MAC_FILE_PIVOT_ROOT] = "file::pivot_root", | |
61 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file", | |
9590837b KT |
62 | }; |
63 | ||
9590837b KT |
64 | /* Permit policy management by non-root user? */ |
65 | static bool tomoyo_manage_by_non_root; | |
66 | ||
67 | /* Utility functions. */ | |
68 | ||
57c2590f TH |
69 | /** |
70 | * tomoyo_yesno - Return "yes" or "no". | |
71 | * | |
72 | * @value: Bool value. | |
73 | */ | |
74 | static const char *tomoyo_yesno(const unsigned int value) | |
75 | { | |
76 | return value ? "yes" : "no"; | |
77 | } | |
78 | ||
f23571e8 TH |
79 | static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...) |
80 | { | |
81 | va_list args; | |
82 | const int pos = strlen(buffer); | |
83 | va_start(args, fmt); | |
84 | vsnprintf(buffer + pos, len - pos - 1, fmt, args); | |
85 | va_end(args); | |
86 | } | |
87 | ||
7762fbff | 88 | /** |
f23571e8 | 89 | * tomoyo_flush - Flush queued string to userspace's buffer. |
7762fbff | 90 | * |
f23571e8 | 91 | * @head: Pointer to "struct tomoyo_io_buffer". |
7762fbff | 92 | * |
f23571e8 | 93 | * Returns true if all data was flushed, false otherwise. |
7762fbff | 94 | */ |
f23571e8 | 95 | static bool tomoyo_flush(struct tomoyo_io_buffer *head) |
7762fbff | 96 | { |
f23571e8 TH |
97 | while (head->r.w_pos) { |
98 | const char *w = head->r.w[0]; | |
99 | int len = strlen(w); | |
100 | if (len) { | |
101 | if (len > head->read_user_buf_avail) | |
102 | len = head->read_user_buf_avail; | |
103 | if (!len) | |
104 | return false; | |
105 | if (copy_to_user(head->read_user_buf, w, len)) | |
106 | return false; | |
107 | head->read_user_buf_avail -= len; | |
108 | head->read_user_buf += len; | |
109 | w += len; | |
110 | } | |
111 | if (*w) { | |
112 | head->r.w[0] = w; | |
113 | return false; | |
114 | } | |
115 | /* Add '\0' for query. */ | |
116 | if (head->poll) { | |
117 | if (!head->read_user_buf_avail || | |
118 | copy_to_user(head->read_user_buf, "", 1)) | |
119 | return false; | |
120 | head->read_user_buf_avail--; | |
121 | head->read_user_buf++; | |
122 | } | |
123 | head->r.w_pos--; | |
124 | for (len = 0; len < head->r.w_pos; len++) | |
125 | head->r.w[len] = head->r.w[len + 1]; | |
126 | } | |
127 | head->r.avail = 0; | |
128 | return true; | |
7762fbff TH |
129 | } |
130 | ||
4c3e9e2d | 131 | /** |
f23571e8 | 132 | * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure. |
4c3e9e2d | 133 | * |
f23571e8 TH |
134 | * @head: Pointer to "struct tomoyo_io_buffer". |
135 | * @string: String to print. | |
4c3e9e2d | 136 | * |
f23571e8 TH |
137 | * Note that @string has to be kept valid until @head is kfree()d. |
138 | * This means that char[] allocated on stack memory cannot be passed to | |
139 | * this function. Use tomoyo_io_printf() for char[] allocated on stack memory. | |
4c3e9e2d | 140 | */ |
f23571e8 | 141 | static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string) |
4c3e9e2d | 142 | { |
f23571e8 TH |
143 | if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) { |
144 | head->r.w[head->r.w_pos++] = string; | |
145 | tomoyo_flush(head); | |
146 | } else | |
147 | WARN_ON(1); | |
4c3e9e2d TH |
148 | } |
149 | ||
9590837b | 150 | /** |
f23571e8 | 151 | * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure. |
9590837b KT |
152 | * |
153 | * @head: Pointer to "struct tomoyo_io_buffer". | |
154 | * @fmt: The printf()'s format string, followed by parameters. | |
9590837b | 155 | */ |
f23571e8 | 156 | void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...) |
9590837b KT |
157 | { |
158 | va_list args; | |
159 | int len; | |
f23571e8 | 160 | int pos = head->r.avail; |
9590837b | 161 | int size = head->readbuf_size - pos; |
9590837b | 162 | if (size <= 0) |
f23571e8 | 163 | return; |
9590837b | 164 | va_start(args, fmt); |
f23571e8 | 165 | len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1; |
9590837b | 166 | va_end(args); |
f23571e8 TH |
167 | if (pos + len >= head->readbuf_size) { |
168 | WARN_ON(1); | |
169 | return; | |
170 | } | |
171 | head->r.avail += len; | |
172 | tomoyo_set_string(head, head->read_buf + pos); | |
173 | } | |
174 | ||
175 | static void tomoyo_set_space(struct tomoyo_io_buffer *head) | |
176 | { | |
177 | tomoyo_set_string(head, " "); | |
178 | } | |
179 | ||
180 | static bool tomoyo_set_lf(struct tomoyo_io_buffer *head) | |
181 | { | |
182 | tomoyo_set_string(head, "\n"); | |
183 | return !head->r.w_pos; | |
184 | } | |
185 | ||
186 | /** | |
187 | * tomoyo_print_name_union - Print a tomoyo_name_union. | |
188 | * | |
189 | * @head: Pointer to "struct tomoyo_io_buffer". | |
190 | * @ptr: Pointer to "struct tomoyo_name_union". | |
191 | */ | |
192 | static void tomoyo_print_name_union(struct tomoyo_io_buffer *head, | |
193 | const struct tomoyo_name_union *ptr) | |
194 | { | |
195 | tomoyo_set_space(head); | |
196 | if (ptr->is_group) { | |
197 | tomoyo_set_string(head, "@"); | |
198 | tomoyo_set_string(head, ptr->group->group_name->name); | |
199 | } else { | |
200 | tomoyo_set_string(head, ptr->filename->name); | |
201 | } | |
202 | } | |
203 | ||
204 | /** | |
205 | * tomoyo_print_number_union - Print a tomoyo_number_union. | |
206 | * | |
207 | * @head: Pointer to "struct tomoyo_io_buffer". | |
208 | * @ptr: Pointer to "struct tomoyo_number_union". | |
209 | */ | |
210 | static void tomoyo_print_number_union(struct tomoyo_io_buffer *head, | |
211 | const struct tomoyo_number_union *ptr) | |
212 | { | |
213 | tomoyo_set_space(head); | |
214 | if (ptr->is_group) { | |
215 | tomoyo_set_string(head, "@"); | |
216 | tomoyo_set_string(head, ptr->group->group_name->name); | |
217 | } else { | |
218 | int i; | |
219 | unsigned long min = ptr->values[0]; | |
220 | const unsigned long max = ptr->values[1]; | |
221 | u8 min_type = ptr->min_type; | |
222 | const u8 max_type = ptr->max_type; | |
223 | char buffer[128]; | |
224 | buffer[0] = '\0'; | |
225 | for (i = 0; i < 2; i++) { | |
226 | switch (min_type) { | |
227 | case TOMOYO_VALUE_TYPE_HEXADECIMAL: | |
228 | tomoyo_addprintf(buffer, sizeof(buffer), | |
229 | "0x%lX", min); | |
230 | break; | |
231 | case TOMOYO_VALUE_TYPE_OCTAL: | |
232 | tomoyo_addprintf(buffer, sizeof(buffer), | |
233 | "0%lo", min); | |
234 | break; | |
235 | default: | |
236 | tomoyo_addprintf(buffer, sizeof(buffer), | |
237 | "%lu", min); | |
238 | break; | |
239 | } | |
240 | if (min == max && min_type == max_type) | |
241 | break; | |
242 | tomoyo_addprintf(buffer, sizeof(buffer), "-"); | |
243 | min_type = max_type; | |
244 | min = max; | |
245 | } | |
246 | tomoyo_io_printf(head, "%s", buffer); | |
247 | } | |
9590837b KT |
248 | } |
249 | ||
9590837b KT |
250 | /** |
251 | * tomoyo_find_or_assign_new_profile - Create a new profile. | |
252 | * | |
253 | * @profile: Profile number to create. | |
254 | * | |
255 | * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise. | |
256 | */ | |
57c2590f TH |
257 | static struct tomoyo_profile *tomoyo_find_or_assign_new_profile |
258 | (const unsigned int profile) | |
9590837b | 259 | { |
57c2590f TH |
260 | struct tomoyo_profile *ptr; |
261 | struct tomoyo_profile *entry; | |
9590837b KT |
262 | if (profile >= TOMOYO_MAX_PROFILES) |
263 | return NULL; | |
9590837b KT |
264 | ptr = tomoyo_profile_ptr[profile]; |
265 | if (ptr) | |
57c2590f TH |
266 | return ptr; |
267 | entry = kzalloc(sizeof(*entry), GFP_NOFS); | |
268 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) | |
269 | goto out; | |
270 | ptr = tomoyo_profile_ptr[profile]; | |
271 | if (!ptr && tomoyo_memory_ok(entry)) { | |
272 | ptr = entry; | |
273 | ptr->learning = &tomoyo_default_profile.preference; | |
274 | ptr->permissive = &tomoyo_default_profile.preference; | |
275 | ptr->enforcing = &tomoyo_default_profile.preference; | |
276 | ptr->default_config = TOMOYO_CONFIG_DISABLED; | |
277 | memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT, | |
278 | sizeof(ptr->config)); | |
279 | mb(); /* Avoid out-of-order execution. */ | |
280 | tomoyo_profile_ptr[profile] = ptr; | |
281 | entry = NULL; | |
cd7bec6a | 282 | } |
29282381 | 283 | mutex_unlock(&tomoyo_policy_lock); |
57c2590f TH |
284 | out: |
285 | kfree(entry); | |
9590837b KT |
286 | return ptr; |
287 | } | |
288 | ||
289 | /** | |
57c2590f TH |
290 | * tomoyo_profile - Find a profile. |
291 | * | |
292 | * @profile: Profile number to find. | |
293 | * | |
294 | * Returns pointer to "struct tomoyo_profile". | |
295 | */ | |
296 | struct tomoyo_profile *tomoyo_profile(const u8 profile) | |
297 | { | |
298 | struct tomoyo_profile *ptr = tomoyo_profile_ptr[profile]; | |
299 | if (!tomoyo_policy_loaded) | |
300 | return &tomoyo_default_profile; | |
301 | BUG_ON(!ptr); | |
302 | return ptr; | |
303 | } | |
304 | ||
305 | /** | |
306 | * tomoyo_write_profile - Write profile table. | |
9590837b KT |
307 | * |
308 | * @head: Pointer to "struct tomoyo_io_buffer". | |
309 | * | |
310 | * Returns 0 on success, negative value otherwise. | |
311 | */ | |
312 | static int tomoyo_write_profile(struct tomoyo_io_buffer *head) | |
313 | { | |
314 | char *data = head->write_buf; | |
315 | unsigned int i; | |
57c2590f TH |
316 | int value; |
317 | int mode; | |
318 | u8 config; | |
319 | bool use_default = false; | |
9590837b KT |
320 | char *cp; |
321 | struct tomoyo_profile *profile; | |
57c2590f TH |
322 | if (sscanf(data, "PROFILE_VERSION=%u", &tomoyo_profile_version) == 1) |
323 | return 0; | |
324 | i = simple_strtoul(data, &cp, 10); | |
325 | if (data == cp) { | |
326 | profile = &tomoyo_default_profile; | |
327 | } else { | |
328 | if (*cp != '-') | |
329 | return -EINVAL; | |
9590837b | 330 | data = cp + 1; |
57c2590f TH |
331 | profile = tomoyo_find_or_assign_new_profile(i); |
332 | if (!profile) | |
333 | return -EINVAL; | |
334 | } | |
9590837b KT |
335 | cp = strchr(data, '='); |
336 | if (!cp) | |
337 | return -EINVAL; | |
57c2590f TH |
338 | *cp++ = '\0'; |
339 | if (profile != &tomoyo_default_profile) | |
340 | use_default = strstr(cp, "use_default") != NULL; | |
341 | if (strstr(cp, "verbose=yes")) | |
342 | value = 1; | |
343 | else if (strstr(cp, "verbose=no")) | |
344 | value = 0; | |
345 | else | |
346 | value = -1; | |
347 | if (!strcmp(data, "PREFERENCE::enforcing")) { | |
348 | if (use_default) { | |
349 | profile->enforcing = &tomoyo_default_profile.preference; | |
350 | return 0; | |
351 | } | |
352 | profile->enforcing = &profile->preference; | |
353 | if (value >= 0) | |
354 | profile->preference.enforcing_verbose = value; | |
355 | return 0; | |
356 | } | |
357 | if (!strcmp(data, "PREFERENCE::permissive")) { | |
358 | if (use_default) { | |
359 | profile->permissive = &tomoyo_default_profile.preference; | |
360 | return 0; | |
361 | } | |
362 | profile->permissive = &profile->preference; | |
363 | if (value >= 0) | |
364 | profile->preference.permissive_verbose = value; | |
365 | return 0; | |
366 | } | |
367 | if (!strcmp(data, "PREFERENCE::learning")) { | |
368 | char *cp2; | |
369 | if (use_default) { | |
370 | profile->learning = &tomoyo_default_profile.preference; | |
371 | return 0; | |
372 | } | |
373 | profile->learning = &profile->preference; | |
374 | if (value >= 0) | |
375 | profile->preference.learning_verbose = value; | |
376 | cp2 = strstr(cp, "max_entry="); | |
377 | if (cp2) | |
378 | sscanf(cp2 + 10, "%u", | |
379 | &profile->preference.learning_max_entry); | |
380 | return 0; | |
381 | } | |
382 | if (profile == &tomoyo_default_profile) | |
383 | return -EINVAL; | |
9590837b | 384 | if (!strcmp(data, "COMMENT")) { |
bf24fb01 | 385 | const struct tomoyo_path_info *old_comment = profile->comment; |
57c2590f | 386 | profile->comment = tomoyo_get_name(cp); |
bf24fb01 | 387 | tomoyo_put_name(old_comment); |
9590837b KT |
388 | return 0; |
389 | } | |
57c2590f TH |
390 | if (!strcmp(data, "CONFIG")) { |
391 | i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX; | |
392 | config = profile->default_config; | |
393 | } else if (tomoyo_str_starts(&data, "CONFIG::")) { | |
394 | config = 0; | |
395 | for (i = 0; i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) { | |
396 | if (strcmp(data, tomoyo_mac_keywords[i])) | |
397 | continue; | |
398 | config = profile->config[i]; | |
399 | break; | |
9590837b | 400 | } |
57c2590f TH |
401 | if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) |
402 | return -EINVAL; | |
403 | } else { | |
404 | return -EINVAL; | |
9590837b | 405 | } |
57c2590f TH |
406 | if (use_default) { |
407 | config = TOMOYO_CONFIG_USE_DEFAULT; | |
408 | } else { | |
409 | for (mode = 3; mode >= 0; mode--) | |
f23571e8 | 410 | if (strstr(cp, tomoyo_mode[mode])) |
57c2590f TH |
411 | /* |
412 | * Update lower 3 bits in order to distinguish | |
413 | * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'. | |
414 | */ | |
415 | config = (config & ~7) | mode; | |
416 | } | |
417 | if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) | |
418 | profile->config[i] = config; | |
419 | else if (config != TOMOYO_CONFIG_USE_DEFAULT) | |
420 | profile->default_config = config; | |
421 | return 0; | |
9590837b KT |
422 | } |
423 | ||
f23571e8 TH |
424 | static void tomoyo_print_preference(struct tomoyo_io_buffer *head, |
425 | const int idx) | |
426 | { | |
427 | struct tomoyo_preference *pref = &tomoyo_default_profile.preference; | |
428 | const struct tomoyo_profile *profile = idx >= 0 ? | |
429 | tomoyo_profile_ptr[idx] : NULL; | |
430 | char buffer[16] = ""; | |
431 | if (profile) { | |
432 | buffer[sizeof(buffer) - 1] = '\0'; | |
433 | snprintf(buffer, sizeof(buffer) - 1, "%u-", idx); | |
434 | } | |
435 | if (profile) { | |
436 | pref = profile->learning; | |
437 | if (pref == &tomoyo_default_profile.preference) | |
438 | goto skip1; | |
439 | } | |
440 | tomoyo_io_printf(head, "%sPREFERENCE::%s={ " | |
441 | "verbose=%s max_entry=%u }\n", | |
442 | buffer, "learning", | |
443 | tomoyo_yesno(pref->learning_verbose), | |
444 | pref->learning_max_entry); | |
445 | skip1: | |
446 | if (profile) { | |
447 | pref = profile->permissive; | |
448 | if (pref == &tomoyo_default_profile.preference) | |
449 | goto skip2; | |
450 | } | |
451 | tomoyo_io_printf(head, "%sPREFERENCE::%s={ verbose=%s }\n", | |
452 | buffer, "permissive", | |
453 | tomoyo_yesno(pref->permissive_verbose)); | |
454 | skip2: | |
455 | if (profile) { | |
456 | pref = profile->enforcing; | |
457 | if (pref == &tomoyo_default_profile.preference) | |
458 | return; | |
459 | } | |
460 | tomoyo_io_printf(head, "%sPREFERENCE::%s={ verbose=%s }\n", | |
461 | buffer, "enforcing", | |
462 | tomoyo_yesno(pref->enforcing_verbose)); | |
463 | } | |
464 | ||
465 | static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config) | |
466 | { | |
467 | tomoyo_io_printf(head, "={ mode=%s }\n", tomoyo_mode[config & 3]); | |
468 | } | |
469 | ||
9590837b | 470 | /** |
57c2590f | 471 | * tomoyo_read_profile - Read profile table. |
9590837b KT |
472 | * |
473 | * @head: Pointer to "struct tomoyo_io_buffer". | |
9590837b | 474 | */ |
8fbe71f0 | 475 | static void tomoyo_read_profile(struct tomoyo_io_buffer *head) |
9590837b | 476 | { |
f23571e8 TH |
477 | u8 index; |
478 | const struct tomoyo_profile *profile; | |
479 | next: | |
480 | index = head->r.index; | |
481 | profile = tomoyo_profile_ptr[index]; | |
482 | switch (head->r.step) { | |
483 | case 0: | |
484 | tomoyo_io_printf(head, "PROFILE_VERSION=%s\n", "20090903"); | |
485 | tomoyo_print_preference(head, -1); | |
486 | head->r.step++; | |
487 | break; | |
488 | case 1: | |
489 | for ( ; head->r.index < TOMOYO_MAX_PROFILES; | |
490 | head->r.index++) | |
491 | if (tomoyo_profile_ptr[head->r.index]) | |
492 | break; | |
493 | if (head->r.index == TOMOYO_MAX_PROFILES) | |
494 | return; | |
495 | head->r.step++; | |
496 | break; | |
497 | case 2: | |
498 | { | |
499 | const struct tomoyo_path_info *comment = | |
500 | profile->comment; | |
501 | tomoyo_io_printf(head, "%u-COMMENT=", index); | |
502 | tomoyo_set_string(head, comment ? comment->name : ""); | |
503 | tomoyo_set_lf(head); | |
504 | head->r.step++; | |
505 | } | |
506 | break; | |
507 | case 3: | |
508 | { | |
509 | tomoyo_io_printf(head, "%u-%s", index, "CONFIG"); | |
510 | tomoyo_print_config(head, profile->default_config); | |
511 | head->r.bit = 0; | |
512 | head->r.step++; | |
513 | } | |
514 | break; | |
515 | case 4: | |
516 | for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX | |
517 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) { | |
518 | const u8 i = head->r.bit; | |
519 | const u8 config = profile->config[i]; | |
57c2590f TH |
520 | if (config == TOMOYO_CONFIG_USE_DEFAULT) |
521 | continue; | |
f23571e8 TH |
522 | tomoyo_io_printf(head, "%u-%s%s", index, "CONFIG::", |
523 | tomoyo_mac_keywords[i]); | |
524 | tomoyo_print_config(head, config); | |
525 | head->r.bit++; | |
526 | break; | |
527 | } | |
528 | if (head->r.bit == TOMOYO_MAX_MAC_INDEX | |
529 | + TOMOYO_MAX_MAC_CATEGORY_INDEX) { | |
530 | tomoyo_print_preference(head, index); | |
531 | head->r.index++; | |
532 | head->r.step = 1; | |
9590837b | 533 | } |
57c2590f | 534 | break; |
9590837b | 535 | } |
f23571e8 TH |
536 | if (tomoyo_flush(head)) |
537 | goto next; | |
9590837b KT |
538 | } |
539 | ||
36f5e1ff TH |
540 | static bool tomoyo_same_manager_entry(const struct tomoyo_acl_head *a, |
541 | const struct tomoyo_acl_head *b) | |
542 | { | |
543 | return container_of(a, struct tomoyo_policy_manager_entry, head) | |
544 | ->manager == | |
545 | container_of(b, struct tomoyo_policy_manager_entry, head) | |
546 | ->manager; | |
547 | } | |
548 | ||
9590837b KT |
549 | /** |
550 | * tomoyo_update_manager_entry - Add a manager entry. | |
551 | * | |
552 | * @manager: The path to manager or the domainnamme. | |
553 | * @is_delete: True if it is a delete request. | |
554 | * | |
555 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
556 | * |
557 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
558 | */ |
559 | static int tomoyo_update_manager_entry(const char *manager, | |
560 | const bool is_delete) | |
561 | { | |
9e4b50e9 | 562 | struct tomoyo_policy_manager_entry e = { }; |
36f5e1ff | 563 | int error; |
9590837b | 564 | |
75093152 TH |
565 | if (tomoyo_domain_def(manager)) { |
566 | if (!tomoyo_correct_domain(manager)) | |
9590837b | 567 | return -EINVAL; |
9e4b50e9 | 568 | e.is_domain = true; |
9590837b | 569 | } else { |
75093152 | 570 | if (!tomoyo_correct_path(manager)) |
9590837b KT |
571 | return -EINVAL; |
572 | } | |
9e4b50e9 TH |
573 | e.manager = tomoyo_get_name(manager); |
574 | if (!e.manager) | |
9590837b | 575 | return -ENOMEM; |
36f5e1ff | 576 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
a230f9e7 | 577 | &tomoyo_policy_list[TOMOYO_ID_MANAGER], |
36f5e1ff | 578 | tomoyo_same_manager_entry); |
9e4b50e9 | 579 | tomoyo_put_name(e.manager); |
9590837b KT |
580 | return error; |
581 | } | |
582 | ||
583 | /** | |
584 | * tomoyo_write_manager_policy - Write manager policy. | |
585 | * | |
586 | * @head: Pointer to "struct tomoyo_io_buffer". | |
587 | * | |
588 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
589 | * |
590 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
591 | */ |
592 | static int tomoyo_write_manager_policy(struct tomoyo_io_buffer *head) | |
593 | { | |
594 | char *data = head->write_buf; | |
595 | bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE); | |
596 | ||
597 | if (!strcmp(data, "manage_by_non_root")) { | |
598 | tomoyo_manage_by_non_root = !is_delete; | |
599 | return 0; | |
600 | } | |
601 | return tomoyo_update_manager_entry(data, is_delete); | |
602 | } | |
603 | ||
604 | /** | |
605 | * tomoyo_read_manager_policy - Read manager policy. | |
606 | * | |
607 | * @head: Pointer to "struct tomoyo_io_buffer". | |
608 | * | |
fdb8ebb7 | 609 | * Caller holds tomoyo_read_lock(). |
9590837b | 610 | */ |
8fbe71f0 | 611 | static void tomoyo_read_manager_policy(struct tomoyo_io_buffer *head) |
9590837b | 612 | { |
f23571e8 | 613 | if (head->r.eof) |
8fbe71f0 | 614 | return; |
f23571e8 | 615 | list_for_each_cookie(head->r.acl, |
a230f9e7 | 616 | &tomoyo_policy_list[TOMOYO_ID_MANAGER]) { |
475e6fa3 | 617 | struct tomoyo_policy_manager_entry *ptr = |
f23571e8 | 618 | list_entry(head->r.acl, typeof(*ptr), head.list); |
82e0f001 | 619 | if (ptr->head.is_deleted) |
9590837b | 620 | continue; |
f23571e8 TH |
621 | if (!tomoyo_flush(head)) |
622 | return; | |
623 | tomoyo_set_string(head, ptr->manager->name); | |
624 | tomoyo_set_lf(head); | |
9590837b | 625 | } |
f23571e8 | 626 | head->r.eof = true; |
9590837b KT |
627 | } |
628 | ||
629 | /** | |
75093152 | 630 | * tomoyo_policy_manager - Check whether the current process is a policy manager. |
9590837b KT |
631 | * |
632 | * Returns true if the current process is permitted to modify policy | |
633 | * via /sys/kernel/security/tomoyo/ interface. | |
fdb8ebb7 TH |
634 | * |
635 | * Caller holds tomoyo_read_lock(). | |
9590837b | 636 | */ |
75093152 | 637 | static bool tomoyo_policy_manager(void) |
9590837b KT |
638 | { |
639 | struct tomoyo_policy_manager_entry *ptr; | |
640 | const char *exe; | |
641 | const struct task_struct *task = current; | |
642 | const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname; | |
643 | bool found = false; | |
644 | ||
645 | if (!tomoyo_policy_loaded) | |
646 | return true; | |
647 | if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid)) | |
648 | return false; | |
a230f9e7 TH |
649 | list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_MANAGER], |
650 | head.list) { | |
82e0f001 | 651 | if (!ptr->head.is_deleted && ptr->is_domain |
9590837b KT |
652 | && !tomoyo_pathcmp(domainname, ptr->manager)) { |
653 | found = true; | |
654 | break; | |
655 | } | |
656 | } | |
9590837b KT |
657 | if (found) |
658 | return true; | |
659 | exe = tomoyo_get_exe(); | |
660 | if (!exe) | |
661 | return false; | |
a230f9e7 TH |
662 | list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_MANAGER], |
663 | head.list) { | |
82e0f001 | 664 | if (!ptr->head.is_deleted && !ptr->is_domain |
9590837b KT |
665 | && !strcmp(exe, ptr->manager->name)) { |
666 | found = true; | |
667 | break; | |
668 | } | |
669 | } | |
9590837b KT |
670 | if (!found) { /* Reduce error messages. */ |
671 | static pid_t last_pid; | |
672 | const pid_t pid = current->pid; | |
673 | if (last_pid != pid) { | |
674 | printk(KERN_WARNING "%s ( %s ) is not permitted to " | |
675 | "update policies.\n", domainname->name, exe); | |
676 | last_pid = pid; | |
677 | } | |
678 | } | |
8e2d39a1 | 679 | kfree(exe); |
9590837b KT |
680 | return found; |
681 | } | |
682 | ||
683 | /** | |
75093152 | 684 | * tomoyo_select_one - Parse select command. |
9590837b KT |
685 | * |
686 | * @head: Pointer to "struct tomoyo_io_buffer". | |
687 | * @data: String to parse. | |
688 | * | |
689 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
690 | * |
691 | * Caller holds tomoyo_read_lock(). | |
9590837b | 692 | */ |
475e6fa3 | 693 | static bool tomoyo_select_one(struct tomoyo_io_buffer *head, const char *data) |
9590837b KT |
694 | { |
695 | unsigned int pid; | |
696 | struct tomoyo_domain_info *domain = NULL; | |
9b244373 | 697 | bool global_pid = false; |
9590837b | 698 | |
063821c8 | 699 | if (!strcmp(data, "allow_execute")) { |
f23571e8 | 700 | head->r.print_execute_only = true; |
063821c8 TH |
701 | return true; |
702 | } | |
9b244373 TH |
703 | if (sscanf(data, "pid=%u", &pid) == 1 || |
704 | (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) { | |
9590837b | 705 | struct task_struct *p; |
1fcdc7c5 | 706 | rcu_read_lock(); |
9590837b | 707 | read_lock(&tasklist_lock); |
9b244373 TH |
708 | if (global_pid) |
709 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
710 | else | |
711 | p = find_task_by_vpid(pid); | |
9590837b KT |
712 | if (p) |
713 | domain = tomoyo_real_domain(p); | |
714 | read_unlock(&tasklist_lock); | |
1fcdc7c5 | 715 | rcu_read_unlock(); |
9590837b | 716 | } else if (!strncmp(data, "domain=", 7)) { |
75093152 | 717 | if (tomoyo_domain_def(data + 7)) |
9590837b | 718 | domain = tomoyo_find_domain(data + 7); |
9590837b KT |
719 | } else |
720 | return false; | |
721 | head->write_var1 = domain; | |
722 | /* Accessing read_buf is safe because head->io_sem is held. */ | |
723 | if (!head->read_buf) | |
724 | return true; /* Do nothing if open(O_WRONLY). */ | |
f23571e8 TH |
725 | memset(&head->r, 0, sizeof(head->r)); |
726 | head->r.print_this_domain_only = true; | |
727 | head->r.eof = !domain; | |
728 | head->r.domain = &domain->list; | |
9590837b | 729 | tomoyo_io_printf(head, "# select %s\n", data); |
475e6fa3 TH |
730 | if (domain && domain->is_deleted) |
731 | tomoyo_io_printf(head, "# This is a deleted domain.\n"); | |
9590837b KT |
732 | return true; |
733 | } | |
734 | ||
ccf135f5 TH |
735 | /** |
736 | * tomoyo_delete_domain - Delete a domain. | |
737 | * | |
738 | * @domainname: The name of domain. | |
739 | * | |
740 | * Returns 0. | |
fdb8ebb7 TH |
741 | * |
742 | * Caller holds tomoyo_read_lock(). | |
ccf135f5 TH |
743 | */ |
744 | static int tomoyo_delete_domain(char *domainname) | |
745 | { | |
746 | struct tomoyo_domain_info *domain; | |
747 | struct tomoyo_path_info name; | |
748 | ||
749 | name.name = domainname; | |
750 | tomoyo_fill_path_info(&name); | |
29282381 TH |
751 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
752 | return 0; | |
ccf135f5 | 753 | /* Is there an active domain? */ |
fdb8ebb7 | 754 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
ccf135f5 TH |
755 | /* Never delete tomoyo_kernel_domain */ |
756 | if (domain == &tomoyo_kernel_domain) | |
757 | continue; | |
758 | if (domain->is_deleted || | |
759 | tomoyo_pathcmp(domain->domainname, &name)) | |
760 | continue; | |
761 | domain->is_deleted = true; | |
762 | break; | |
763 | } | |
f737d95d | 764 | mutex_unlock(&tomoyo_policy_lock); |
ccf135f5 TH |
765 | return 0; |
766 | } | |
767 | ||
17fcfbd9 TH |
768 | /** |
769 | * tomoyo_write_domain_policy2 - Write domain policy. | |
770 | * | |
771 | * @head: Pointer to "struct tomoyo_io_buffer". | |
772 | * | |
773 | * Returns 0 on success, negative value otherwise. | |
774 | * | |
775 | * Caller holds tomoyo_read_lock(). | |
776 | */ | |
777 | static int tomoyo_write_domain_policy2(char *data, | |
778 | struct tomoyo_domain_info *domain, | |
779 | const bool is_delete) | |
780 | { | |
781 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALLOW_MOUNT)) | |
782 | return tomoyo_write_mount_policy(data, domain, is_delete); | |
783 | return tomoyo_write_file_policy(data, domain, is_delete); | |
784 | } | |
785 | ||
9590837b KT |
786 | /** |
787 | * tomoyo_write_domain_policy - Write domain policy. | |
788 | * | |
789 | * @head: Pointer to "struct tomoyo_io_buffer". | |
790 | * | |
791 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
792 | * |
793 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
794 | */ |
795 | static int tomoyo_write_domain_policy(struct tomoyo_io_buffer *head) | |
796 | { | |
797 | char *data = head->write_buf; | |
798 | struct tomoyo_domain_info *domain = head->write_var1; | |
799 | bool is_delete = false; | |
800 | bool is_select = false; | |
9590837b KT |
801 | unsigned int profile; |
802 | ||
803 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE)) | |
804 | is_delete = true; | |
805 | else if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_SELECT)) | |
806 | is_select = true; | |
75093152 | 807 | if (is_select && tomoyo_select_one(head, data)) |
9590837b KT |
808 | return 0; |
809 | /* Don't allow updating policies by non manager programs. */ | |
75093152 | 810 | if (!tomoyo_policy_manager()) |
9590837b | 811 | return -EPERM; |
75093152 | 812 | if (tomoyo_domain_def(data)) { |
9590837b KT |
813 | domain = NULL; |
814 | if (is_delete) | |
815 | tomoyo_delete_domain(data); | |
fdb8ebb7 | 816 | else if (is_select) |
9590837b | 817 | domain = tomoyo_find_domain(data); |
fdb8ebb7 | 818 | else |
9590837b KT |
819 | domain = tomoyo_find_or_assign_new_domain(data, 0); |
820 | head->write_var1 = domain; | |
821 | return 0; | |
822 | } | |
823 | if (!domain) | |
824 | return -EINVAL; | |
825 | ||
826 | if (sscanf(data, TOMOYO_KEYWORD_USE_PROFILE "%u", &profile) == 1 | |
827 | && profile < TOMOYO_MAX_PROFILES) { | |
828 | if (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded) | |
829 | domain->profile = (u8) profile; | |
830 | return 0; | |
831 | } | |
832 | if (!strcmp(data, TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ)) { | |
ea13ddba | 833 | domain->ignore_global_allow_read = !is_delete; |
9590837b KT |
834 | return 0; |
835 | } | |
9b244373 TH |
836 | if (!strcmp(data, TOMOYO_KEYWORD_QUOTA_EXCEEDED)) { |
837 | domain->quota_warned = !is_delete; | |
838 | return 0; | |
839 | } | |
840 | if (!strcmp(data, TOMOYO_KEYWORD_TRANSITION_FAILED)) { | |
841 | domain->transition_failed = !is_delete; | |
842 | return 0; | |
843 | } | |
17fcfbd9 | 844 | return tomoyo_write_domain_policy2(data, domain, is_delete); |
9590837b KT |
845 | } |
846 | ||
847 | /** | |
5db5a39b | 848 | * tomoyo_fns - Find next set bit. |
9590837b | 849 | * |
5db5a39b TH |
850 | * @perm: 8 bits value. |
851 | * @bit: First bit to find. | |
9590837b | 852 | * |
5db5a39b | 853 | * Returns next on-bit on success, 8 otherwise. |
9590837b | 854 | */ |
5db5a39b | 855 | static u8 tomoyo_fns(const u8 perm, u8 bit) |
9590837b | 856 | { |
5db5a39b TH |
857 | for ( ; bit < 8; bit++) |
858 | if (perm & (1 << bit)) | |
859 | break; | |
860 | return bit; | |
9590837b KT |
861 | } |
862 | ||
863 | /** | |
5db5a39b | 864 | * tomoyo_print_entry - Print an ACL entry. |
9590837b KT |
865 | * |
866 | * @head: Pointer to "struct tomoyo_io_buffer". | |
5db5a39b | 867 | * @acl: Pointer to an ACL entry. |
9590837b KT |
868 | * |
869 | * Returns true on success, false otherwise. | |
870 | */ | |
5db5a39b TH |
871 | static bool tomoyo_print_entry(struct tomoyo_io_buffer *head, |
872 | struct tomoyo_acl_info *acl) | |
9590837b | 873 | { |
5db5a39b | 874 | const u8 acl_type = acl->type; |
f23571e8 | 875 | u8 bit; |
9590837b | 876 | |
5db5a39b TH |
877 | if (acl->is_deleted) |
878 | return true; | |
879 | next: | |
f23571e8 TH |
880 | bit = head->r.bit; |
881 | if (!tomoyo_flush(head)) | |
882 | return false; | |
883 | else if (acl_type == TOMOYO_TYPE_PATH_ACL) { | |
5db5a39b TH |
884 | struct tomoyo_path_acl *ptr = |
885 | container_of(acl, typeof(*ptr), head); | |
886 | const u16 perm = ptr->perm; | |
887 | for ( ; bit < TOMOYO_MAX_PATH_OPERATION; bit++) { | |
888 | if (!(perm & (1 << bit))) | |
889 | continue; | |
f23571e8 | 890 | if (head->r.print_execute_only && |
5db5a39b TH |
891 | bit != TOMOYO_TYPE_EXECUTE) |
892 | continue; | |
893 | /* Print "read/write" instead of "read" and "write". */ | |
894 | if ((bit == TOMOYO_TYPE_READ || | |
895 | bit == TOMOYO_TYPE_WRITE) | |
896 | && (perm & (1 << TOMOYO_TYPE_READ_WRITE))) | |
897 | continue; | |
898 | break; | |
899 | } | |
900 | if (bit >= TOMOYO_MAX_PATH_OPERATION) | |
901 | goto done; | |
f23571e8 TH |
902 | tomoyo_io_printf(head, "allow_%s", tomoyo_path_keyword[bit]); |
903 | tomoyo_print_name_union(head, &ptr->name); | |
904 | } else if (head->r.print_execute_only) { | |
5db5a39b TH |
905 | return true; |
906 | } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) { | |
907 | struct tomoyo_path2_acl *ptr = | |
908 | container_of(acl, typeof(*ptr), head); | |
909 | bit = tomoyo_fns(ptr->perm, bit); | |
910 | if (bit >= TOMOYO_MAX_PATH2_OPERATION) | |
911 | goto done; | |
f23571e8 TH |
912 | tomoyo_io_printf(head, "allow_%s", tomoyo_path2_keyword[bit]); |
913 | tomoyo_print_name_union(head, &ptr->name1); | |
914 | tomoyo_print_name_union(head, &ptr->name2); | |
5db5a39b TH |
915 | } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) { |
916 | struct tomoyo_path_number_acl *ptr = | |
917 | container_of(acl, typeof(*ptr), head); | |
918 | bit = tomoyo_fns(ptr->perm, bit); | |
919 | if (bit >= TOMOYO_MAX_PATH_NUMBER_OPERATION) | |
920 | goto done; | |
f23571e8 TH |
921 | tomoyo_io_printf(head, "allow_%s", |
922 | tomoyo_path_number_keyword[bit]); | |
923 | tomoyo_print_name_union(head, &ptr->name); | |
924 | tomoyo_print_number_union(head, &ptr->number); | |
5db5a39b TH |
925 | } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) { |
926 | struct tomoyo_mkdev_acl *ptr = | |
927 | container_of(acl, typeof(*ptr), head); | |
928 | bit = tomoyo_fns(ptr->perm, bit); | |
929 | if (bit >= TOMOYO_MAX_MKDEV_OPERATION) | |
930 | goto done; | |
f23571e8 TH |
931 | tomoyo_io_printf(head, "allow_%s", tomoyo_mkdev_keyword[bit]); |
932 | tomoyo_print_name_union(head, &ptr->name); | |
933 | tomoyo_print_number_union(head, &ptr->mode); | |
934 | tomoyo_print_number_union(head, &ptr->major); | |
935 | tomoyo_print_number_union(head, &ptr->minor); | |
5db5a39b TH |
936 | } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) { |
937 | struct tomoyo_mount_acl *ptr = | |
938 | container_of(acl, typeof(*ptr), head); | |
f23571e8 TH |
939 | tomoyo_io_printf(head, "allow_mount"); |
940 | tomoyo_print_name_union(head, &ptr->dev_name); | |
941 | tomoyo_print_name_union(head, &ptr->dir_name); | |
942 | tomoyo_print_name_union(head, &ptr->fs_type); | |
943 | tomoyo_print_number_union(head, &ptr->flags); | |
a1f9bb6a | 944 | } |
f23571e8 TH |
945 | head->r.bit = bit + 1; |
946 | tomoyo_io_printf(head, "\n"); | |
947 | if (acl_type != TOMOYO_TYPE_MOUNT_ACL) | |
5db5a39b | 948 | goto next; |
5db5a39b | 949 | done: |
f23571e8 TH |
950 | head->r.bit = 0; |
951 | return true; | |
952 | } | |
953 | ||
954 | /** | |
955 | * tomoyo_read_domain2 - Read domain policy. | |
956 | * | |
957 | * @head: Pointer to "struct tomoyo_io_buffer". | |
958 | * @domain: Pointer to "struct tomoyo_domain_info". | |
959 | * | |
960 | * Caller holds tomoyo_read_lock(). | |
961 | * | |
962 | * Returns true on success, false otherwise. | |
963 | */ | |
964 | static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head, | |
965 | struct tomoyo_domain_info *domain) | |
966 | { | |
967 | list_for_each_cookie(head->r.acl, &domain->acl_info_list) { | |
968 | struct tomoyo_acl_info *ptr = | |
969 | list_entry(head->r.acl, typeof(*ptr), list); | |
970 | if (!tomoyo_print_entry(head, ptr)) | |
971 | return false; | |
972 | } | |
973 | head->r.acl = NULL; | |
a1f9bb6a | 974 | return true; |
a1f9bb6a TH |
975 | } |
976 | ||
9590837b KT |
977 | /** |
978 | * tomoyo_read_domain_policy - Read domain policy. | |
979 | * | |
980 | * @head: Pointer to "struct tomoyo_io_buffer". | |
981 | * | |
fdb8ebb7 | 982 | * Caller holds tomoyo_read_lock(). |
9590837b | 983 | */ |
8fbe71f0 | 984 | static void tomoyo_read_domain_policy(struct tomoyo_io_buffer *head) |
9590837b | 985 | { |
f23571e8 | 986 | if (head->r.eof) |
8fbe71f0 | 987 | return; |
f23571e8 | 988 | list_for_each_cookie(head->r.domain, &tomoyo_domain_list) { |
475e6fa3 | 989 | struct tomoyo_domain_info *domain = |
f23571e8 TH |
990 | list_entry(head->r.domain, typeof(*domain), list); |
991 | switch (head->r.step) { | |
992 | case 0: | |
993 | if (domain->is_deleted && | |
994 | !head->r.print_this_domain_only) | |
995 | continue; | |
996 | /* Print domainname and flags. */ | |
997 | tomoyo_set_string(head, domain->domainname->name); | |
998 | tomoyo_set_lf(head); | |
999 | tomoyo_io_printf(head, | |
1000 | TOMOYO_KEYWORD_USE_PROFILE "%u\n", | |
1001 | domain->profile); | |
1002 | if (domain->quota_warned) | |
1003 | tomoyo_set_string(head, "quota_exceeded\n"); | |
1004 | if (domain->transition_failed) | |
1005 | tomoyo_set_string(head, "transition_failed\n"); | |
1006 | if (domain->ignore_global_allow_read) | |
1007 | tomoyo_set_string(head, | |
1008 | TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ | |
1009 | "\n"); | |
1010 | head->r.step++; | |
1011 | tomoyo_set_lf(head); | |
1012 | /* fall through */ | |
1013 | case 1: | |
1014 | if (!tomoyo_read_domain2(head, domain)) | |
1015 | return; | |
1016 | head->r.step++; | |
1017 | if (!tomoyo_set_lf(head)) | |
1018 | return; | |
1019 | /* fall through */ | |
1020 | case 2: | |
1021 | head->r.step = 0; | |
1022 | if (head->r.print_this_domain_only) | |
1023 | goto done; | |
9590837b | 1024 | } |
9590837b | 1025 | } |
f23571e8 TH |
1026 | done: |
1027 | head->r.eof = true; | |
9590837b KT |
1028 | } |
1029 | ||
1030 | /** | |
1031 | * tomoyo_write_domain_profile - Assign profile for specified domain. | |
1032 | * | |
1033 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1034 | * | |
1035 | * Returns 0 on success, -EINVAL otherwise. | |
1036 | * | |
1037 | * This is equivalent to doing | |
1038 | * | |
1039 | * ( echo "select " $domainname; echo "use_profile " $profile ) | | |
9b244373 | 1040 | * /usr/sbin/tomoyo-loadpolicy -d |
fdb8ebb7 TH |
1041 | * |
1042 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1043 | */ |
1044 | static int tomoyo_write_domain_profile(struct tomoyo_io_buffer *head) | |
1045 | { | |
1046 | char *data = head->write_buf; | |
1047 | char *cp = strchr(data, ' '); | |
1048 | struct tomoyo_domain_info *domain; | |
1049 | unsigned long profile; | |
1050 | ||
1051 | if (!cp) | |
1052 | return -EINVAL; | |
1053 | *cp = '\0'; | |
9590837b | 1054 | domain = tomoyo_find_domain(cp + 1); |
9590837b KT |
1055 | if (strict_strtoul(data, 10, &profile)) |
1056 | return -EINVAL; | |
1057 | if (domain && profile < TOMOYO_MAX_PROFILES | |
1058 | && (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded)) | |
1059 | domain->profile = (u8) profile; | |
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | /** | |
1064 | * tomoyo_read_domain_profile - Read only domainname and profile. | |
1065 | * | |
1066 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1067 | * | |
1068 | * Returns list of profile number and domainname pairs. | |
1069 | * | |
1070 | * This is equivalent to doing | |
1071 | * | |
1072 | * grep -A 1 '^<kernel>' /sys/kernel/security/tomoyo/domain_policy | | |
1073 | * awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" ) | |
1074 | * domainname = $0; } else if ( $1 == "use_profile" ) { | |
1075 | * print $2 " " domainname; domainname = ""; } } ; ' | |
fdb8ebb7 TH |
1076 | * |
1077 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1078 | */ |
8fbe71f0 | 1079 | static void tomoyo_read_domain_profile(struct tomoyo_io_buffer *head) |
9590837b | 1080 | { |
f23571e8 | 1081 | if (head->r.eof) |
8fbe71f0 | 1082 | return; |
f23571e8 | 1083 | list_for_each_cookie(head->r.domain, &tomoyo_domain_list) { |
475e6fa3 | 1084 | struct tomoyo_domain_info *domain = |
f23571e8 | 1085 | list_entry(head->r.domain, typeof(*domain), list); |
9590837b KT |
1086 | if (domain->is_deleted) |
1087 | continue; | |
f23571e8 TH |
1088 | if (!tomoyo_flush(head)) |
1089 | return; | |
1090 | tomoyo_io_printf(head, "%u ", domain->profile); | |
1091 | tomoyo_set_string(head, domain->domainname->name); | |
1092 | tomoyo_set_lf(head); | |
9590837b | 1093 | } |
f23571e8 | 1094 | head->r.eof = true; |
9590837b KT |
1095 | } |
1096 | ||
1097 | /** | |
1098 | * tomoyo_write_pid: Specify PID to obtain domainname. | |
1099 | * | |
1100 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1101 | * | |
1102 | * Returns 0. | |
1103 | */ | |
1104 | static int tomoyo_write_pid(struct tomoyo_io_buffer *head) | |
1105 | { | |
f23571e8 | 1106 | head->r.eof = false; |
9590837b KT |
1107 | return 0; |
1108 | } | |
1109 | ||
1110 | /** | |
1111 | * tomoyo_read_pid - Get domainname of the specified PID. | |
1112 | * | |
1113 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1114 | * | |
1115 | * Returns the domainname which the specified PID is in on success, | |
1116 | * empty string otherwise. | |
1117 | * The PID is specified by tomoyo_write_pid() so that the user can obtain | |
1118 | * using read()/write() interface rather than sysctl() interface. | |
1119 | */ | |
8fbe71f0 | 1120 | static void tomoyo_read_pid(struct tomoyo_io_buffer *head) |
9590837b | 1121 | { |
f23571e8 TH |
1122 | char *buf = head->write_buf; |
1123 | bool global_pid = false; | |
1124 | unsigned int pid; | |
1125 | struct task_struct *p; | |
1126 | struct tomoyo_domain_info *domain = NULL; | |
1127 | ||
1128 | /* Accessing write_buf is safe because head->io_sem is held. */ | |
1129 | if (!buf) { | |
1130 | head->r.eof = true; | |
1131 | return; /* Do nothing if open(O_RDONLY). */ | |
9590837b | 1132 | } |
f23571e8 TH |
1133 | if (head->r.w_pos || head->r.eof) |
1134 | return; | |
1135 | head->r.eof = true; | |
1136 | if (tomoyo_str_starts(&buf, "global-pid ")) | |
1137 | global_pid = true; | |
1138 | pid = (unsigned int) simple_strtoul(buf, NULL, 10); | |
1139 | rcu_read_lock(); | |
1140 | read_lock(&tasklist_lock); | |
1141 | if (global_pid) | |
1142 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
1143 | else | |
1144 | p = find_task_by_vpid(pid); | |
1145 | if (p) | |
1146 | domain = tomoyo_real_domain(p); | |
1147 | read_unlock(&tasklist_lock); | |
1148 | rcu_read_unlock(); | |
1149 | if (!domain) | |
1150 | return; | |
1151 | tomoyo_io_printf(head, "%u %u ", pid, domain->profile); | |
1152 | tomoyo_set_string(head, domain->domainname->name); | |
9590837b KT |
1153 | } |
1154 | ||
5448ec4f TH |
1155 | static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = { |
1156 | [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] | |
1157 | = TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN, | |
1158 | [TOMOYO_TRANSITION_CONTROL_INITIALIZE] | |
1159 | = TOMOYO_KEYWORD_INITIALIZE_DOMAIN, | |
1160 | [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = TOMOYO_KEYWORD_NO_KEEP_DOMAIN, | |
1161 | [TOMOYO_TRANSITION_CONTROL_KEEP] = TOMOYO_KEYWORD_KEEP_DOMAIN | |
1162 | }; | |
1163 | ||
9590837b KT |
1164 | /** |
1165 | * tomoyo_write_exception_policy - Write exception policy. | |
1166 | * | |
1167 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1168 | * | |
1169 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1170 | * |
1171 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1172 | */ |
1173 | static int tomoyo_write_exception_policy(struct tomoyo_io_buffer *head) | |
1174 | { | |
1175 | char *data = head->write_buf; | |
1176 | bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE); | |
5448ec4f | 1177 | u8 i; |
9590837b | 1178 | |
5448ec4f TH |
1179 | for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++) { |
1180 | if (tomoyo_str_starts(&data, tomoyo_transition_type[i])) | |
1181 | return tomoyo_write_transition_control(data, is_delete, | |
1182 | i); | |
1183 | } | |
1084307c TH |
1184 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_AGGREGATOR)) |
1185 | return tomoyo_write_aggregator_policy(data, is_delete); | |
9590837b KT |
1186 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALLOW_READ)) |
1187 | return tomoyo_write_globally_readable_policy(data, is_delete); | |
1188 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_FILE_PATTERN)) | |
1189 | return tomoyo_write_pattern_policy(data, is_delete); | |
1190 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DENY_REWRITE)) | |
1191 | return tomoyo_write_no_rewrite_policy(data, is_delete); | |
7762fbff | 1192 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_PATH_GROUP)) |
7c2ea22e | 1193 | return tomoyo_write_group(data, is_delete, TOMOYO_PATH_GROUP); |
4c3e9e2d | 1194 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NUMBER_GROUP)) |
7c2ea22e | 1195 | return tomoyo_write_group(data, is_delete, TOMOYO_NUMBER_GROUP); |
9590837b KT |
1196 | return -EINVAL; |
1197 | } | |
1198 | ||
31845e8c TH |
1199 | static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = { |
1200 | [TOMOYO_PATH_GROUP] = TOMOYO_KEYWORD_PATH_GROUP, | |
1201 | [TOMOYO_NUMBER_GROUP] = TOMOYO_KEYWORD_NUMBER_GROUP | |
1202 | }; | |
1203 | ||
9590837b | 1204 | /** |
31845e8c | 1205 | * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group" list. |
9590837b KT |
1206 | * |
1207 | * @head: Pointer to "struct tomoyo_io_buffer". | |
31845e8c TH |
1208 | * @idx: Index number. |
1209 | * | |
1210 | * Returns true on success, false otherwise. | |
9590837b | 1211 | * |
fdb8ebb7 | 1212 | * Caller holds tomoyo_read_lock(). |
9590837b | 1213 | */ |
31845e8c | 1214 | static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx) |
9590837b | 1215 | { |
f23571e8 | 1216 | list_for_each_cookie(head->r.group, &tomoyo_group_list[idx]) { |
31845e8c | 1217 | struct tomoyo_group *group = |
f23571e8 TH |
1218 | list_entry(head->r.group, typeof(*group), list); |
1219 | list_for_each_cookie(head->r.acl, &group->member_list) { | |
31845e8c | 1220 | struct tomoyo_acl_head *ptr = |
f23571e8 | 1221 | list_entry(head->r.acl, typeof(*ptr), list); |
31845e8c TH |
1222 | if (ptr->is_deleted) |
1223 | continue; | |
f23571e8 TH |
1224 | if (!tomoyo_flush(head)) |
1225 | return false; | |
1226 | tomoyo_set_string(head, tomoyo_group_name[idx]); | |
1227 | tomoyo_set_string(head, group->group_name->name); | |
31845e8c | 1228 | if (idx == TOMOYO_PATH_GROUP) { |
f23571e8 TH |
1229 | tomoyo_set_space(head); |
1230 | tomoyo_set_string(head, container_of | |
1231 | (ptr, struct tomoyo_path_group, | |
1232 | head)->member_name->name); | |
31845e8c | 1233 | } else if (idx == TOMOYO_NUMBER_GROUP) { |
f23571e8 TH |
1234 | tomoyo_print_number_union(head, &container_of |
1235 | (ptr, | |
1236 | struct tomoyo_number_group, | |
1237 | head)->number); | |
31845e8c | 1238 | } |
f23571e8 | 1239 | tomoyo_set_lf(head); |
31845e8c | 1240 | } |
f23571e8 | 1241 | head->r.acl = NULL; |
31845e8c | 1242 | } |
f23571e8 | 1243 | head->r.group = NULL; |
31845e8c TH |
1244 | return true; |
1245 | } | |
1246 | ||
1247 | /** | |
1248 | * tomoyo_read_policy - Read "struct tomoyo_..._entry" list. | |
1249 | * | |
1250 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1251 | * @idx: Index number. | |
1252 | * | |
1253 | * Returns true on success, false otherwise. | |
1254 | * | |
1255 | * Caller holds tomoyo_read_lock(). | |
1256 | */ | |
1257 | static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx) | |
1258 | { | |
f23571e8 | 1259 | list_for_each_cookie(head->r.acl, &tomoyo_policy_list[idx]) { |
475e6fa3 | 1260 | struct tomoyo_acl_head *acl = |
f23571e8 | 1261 | container_of(head->r.acl, typeof(*acl), list); |
31845e8c TH |
1262 | if (acl->is_deleted) |
1263 | continue; | |
f23571e8 TH |
1264 | if (!tomoyo_flush(head)) |
1265 | return false; | |
31845e8c | 1266 | switch (idx) { |
5448ec4f | 1267 | case TOMOYO_ID_TRANSITION_CONTROL: |
31845e8c | 1268 | { |
5448ec4f | 1269 | struct tomoyo_transition_control *ptr = |
31845e8c | 1270 | container_of(acl, typeof(*ptr), head); |
f23571e8 TH |
1271 | tomoyo_set_string(head, |
1272 | tomoyo_transition_type | |
1273 | [ptr->type]); | |
5448ec4f | 1274 | if (ptr->program) |
f23571e8 TH |
1275 | tomoyo_set_string(head, |
1276 | ptr->program->name); | |
1277 | if (ptr->program && ptr->domainname) | |
1278 | tomoyo_set_string(head, " from "); | |
5448ec4f | 1279 | if (ptr->domainname) |
f23571e8 TH |
1280 | tomoyo_set_string(head, |
1281 | ptr->domainname-> | |
1282 | name); | |
31845e8c TH |
1283 | } |
1284 | break; | |
1285 | case TOMOYO_ID_GLOBALLY_READABLE: | |
1286 | { | |
1287 | struct tomoyo_globally_readable_file_entry *ptr | |
1288 | = container_of(acl, typeof(*ptr), head); | |
f23571e8 TH |
1289 | tomoyo_set_string(head, |
1290 | TOMOYO_KEYWORD_ALLOW_READ); | |
1291 | tomoyo_set_string(head, ptr->filename->name); | |
31845e8c TH |
1292 | } |
1293 | break; | |
31845e8c TH |
1294 | case TOMOYO_ID_AGGREGATOR: |
1295 | { | |
1296 | struct tomoyo_aggregator_entry *ptr = | |
1297 | container_of(acl, typeof(*ptr), head); | |
f23571e8 TH |
1298 | tomoyo_set_string(head, |
1299 | TOMOYO_KEYWORD_AGGREGATOR); | |
1300 | tomoyo_set_string(head, | |
1301 | ptr->original_name->name); | |
1302 | tomoyo_set_space(head); | |
1303 | tomoyo_set_string(head, | |
1304 | ptr->aggregated_name->name); | |
31845e8c TH |
1305 | } |
1306 | break; | |
1307 | case TOMOYO_ID_PATTERN: | |
1308 | { | |
1309 | struct tomoyo_pattern_entry *ptr = | |
1310 | container_of(acl, typeof(*ptr), head); | |
f23571e8 TH |
1311 | tomoyo_set_string(head, |
1312 | TOMOYO_KEYWORD_FILE_PATTERN); | |
1313 | tomoyo_set_string(head, ptr->pattern->name); | |
31845e8c TH |
1314 | } |
1315 | break; | |
1316 | case TOMOYO_ID_NO_REWRITE: | |
1317 | { | |
1318 | struct tomoyo_no_rewrite_entry *ptr = | |
1319 | container_of(acl, typeof(*ptr), head); | |
f23571e8 TH |
1320 | tomoyo_set_string(head, |
1321 | TOMOYO_KEYWORD_DENY_REWRITE); | |
1322 | tomoyo_set_string(head, ptr->pattern->name); | |
31845e8c TH |
1323 | } |
1324 | break; | |
1325 | default: | |
1326 | continue; | |
9590837b | 1327 | } |
f23571e8 | 1328 | tomoyo_set_lf(head); |
9590837b | 1329 | } |
f23571e8 | 1330 | head->r.acl = NULL; |
31845e8c TH |
1331 | return true; |
1332 | } | |
1333 | ||
1334 | /** | |
1335 | * tomoyo_read_exception_policy - Read exception policy. | |
1336 | * | |
1337 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1338 | * | |
1339 | * Caller holds tomoyo_read_lock(). | |
1340 | */ | |
1341 | static void tomoyo_read_exception_policy(struct tomoyo_io_buffer *head) | |
1342 | { | |
f23571e8 | 1343 | if (head->r.eof) |
31845e8c | 1344 | return; |
f23571e8 TH |
1345 | while (head->r.step < TOMOYO_MAX_POLICY && |
1346 | tomoyo_read_policy(head, head->r.step)) | |
1347 | head->r.step++; | |
1348 | if (head->r.step < TOMOYO_MAX_POLICY) | |
31845e8c | 1349 | return; |
f23571e8 TH |
1350 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP && |
1351 | tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY)) | |
1352 | head->r.step++; | |
1353 | if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP) | |
31845e8c | 1354 | return; |
f23571e8 | 1355 | head->r.eof = true; |
9590837b KT |
1356 | } |
1357 | ||
17fcfbd9 TH |
1358 | /** |
1359 | * tomoyo_print_header - Get header line of audit log. | |
1360 | * | |
1361 | * @r: Pointer to "struct tomoyo_request_info". | |
1362 | * | |
1363 | * Returns string representation. | |
1364 | * | |
1365 | * This function uses kmalloc(), so caller must kfree() if this function | |
1366 | * didn't return NULL. | |
1367 | */ | |
1368 | static char *tomoyo_print_header(struct tomoyo_request_info *r) | |
1369 | { | |
17fcfbd9 TH |
1370 | struct timeval tv; |
1371 | const pid_t gpid = task_pid_nr(current); | |
1372 | static const int tomoyo_buffer_len = 4096; | |
1373 | char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS); | |
1374 | if (!buffer) | |
1375 | return NULL; | |
1376 | do_gettimeofday(&tv); | |
1377 | snprintf(buffer, tomoyo_buffer_len - 1, | |
1378 | "#timestamp=%lu profile=%u mode=%s (global-pid=%u)" | |
1379 | " task={ pid=%u ppid=%u uid=%u gid=%u euid=%u" | |
1380 | " egid=%u suid=%u sgid=%u fsuid=%u fsgid=%u }", | |
f23571e8 | 1381 | tv.tv_sec, r->profile, tomoyo_mode[r->mode], gpid, |
17fcfbd9 TH |
1382 | (pid_t) sys_getpid(), (pid_t) sys_getppid(), |
1383 | current_uid(), current_gid(), current_euid(), | |
1384 | current_egid(), current_suid(), current_sgid(), | |
1385 | current_fsuid(), current_fsgid()); | |
1386 | return buffer; | |
1387 | } | |
1388 | ||
1389 | /** | |
1390 | * tomoyo_init_audit_log - Allocate buffer for audit logs. | |
1391 | * | |
1392 | * @len: Required size. | |
1393 | * @r: Pointer to "struct tomoyo_request_info". | |
1394 | * | |
1395 | * Returns pointer to allocated memory. | |
1396 | * | |
1397 | * The @len is updated to add the header lines' size on success. | |
1398 | * | |
1399 | * This function uses kzalloc(), so caller must kfree() if this function | |
1400 | * didn't return NULL. | |
1401 | */ | |
1402 | static char *tomoyo_init_audit_log(int *len, struct tomoyo_request_info *r) | |
1403 | { | |
1404 | char *buf = NULL; | |
1405 | const char *header; | |
1406 | const char *domainname; | |
1407 | if (!r->domain) | |
1408 | r->domain = tomoyo_domain(); | |
1409 | domainname = r->domain->domainname->name; | |
1410 | header = tomoyo_print_header(r); | |
1411 | if (!header) | |
1412 | return NULL; | |
1413 | *len += strlen(domainname) + strlen(header) + 10; | |
1414 | buf = kzalloc(*len, GFP_NOFS); | |
1415 | if (buf) | |
1416 | snprintf(buf, (*len) - 1, "%s\n%s\n", header, domainname); | |
1417 | kfree(header); | |
1418 | return buf; | |
1419 | } | |
1420 | ||
1421 | /* Wait queue for tomoyo_query_list. */ | |
1422 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait); | |
1423 | ||
1424 | /* Lock for manipulating tomoyo_query_list. */ | |
1425 | static DEFINE_SPINLOCK(tomoyo_query_list_lock); | |
1426 | ||
1427 | /* Structure for query. */ | |
1428 | struct tomoyo_query_entry { | |
1429 | struct list_head list; | |
1430 | char *query; | |
1431 | int query_len; | |
1432 | unsigned int serial; | |
1433 | int timer; | |
1434 | int answer; | |
1435 | }; | |
1436 | ||
1437 | /* The list for "struct tomoyo_query_entry". */ | |
1438 | static LIST_HEAD(tomoyo_query_list); | |
1439 | ||
1440 | /* | |
1441 | * Number of "struct file" referring /sys/kernel/security/tomoyo/query | |
1442 | * interface. | |
1443 | */ | |
1444 | static atomic_t tomoyo_query_observers = ATOMIC_INIT(0); | |
1445 | ||
1446 | /** | |
1447 | * tomoyo_supervisor - Ask for the supervisor's decision. | |
1448 | * | |
1449 | * @r: Pointer to "struct tomoyo_request_info". | |
1450 | * @fmt: The printf()'s format string, followed by parameters. | |
1451 | * | |
1452 | * Returns 0 if the supervisor decided to permit the access request which | |
1453 | * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the | |
1454 | * supervisor decided to retry the access request which violated the policy in | |
1455 | * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise. | |
1456 | */ | |
1457 | int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...) | |
1458 | { | |
1459 | va_list args; | |
1460 | int error = -EPERM; | |
1461 | int pos; | |
1462 | int len; | |
1463 | static unsigned int tomoyo_serial; | |
1464 | struct tomoyo_query_entry *tomoyo_query_entry = NULL; | |
1465 | bool quota_exceeded = false; | |
1466 | char *header; | |
1467 | switch (r->mode) { | |
1468 | char *buffer; | |
1469 | case TOMOYO_CONFIG_LEARNING: | |
1470 | if (!tomoyo_domain_quota_is_ok(r)) | |
1471 | return 0; | |
1472 | va_start(args, fmt); | |
1473 | len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 4; | |
1474 | va_end(args); | |
1475 | buffer = kmalloc(len, GFP_NOFS); | |
1476 | if (!buffer) | |
1477 | return 0; | |
1478 | va_start(args, fmt); | |
1479 | vsnprintf(buffer, len - 1, fmt, args); | |
1480 | va_end(args); | |
1481 | tomoyo_normalize_line(buffer); | |
1482 | tomoyo_write_domain_policy2(buffer, r->domain, false); | |
1483 | kfree(buffer); | |
1484 | /* fall through */ | |
1485 | case TOMOYO_CONFIG_PERMISSIVE: | |
1486 | return 0; | |
1487 | } | |
1488 | if (!r->domain) | |
1489 | r->domain = tomoyo_domain(); | |
1490 | if (!atomic_read(&tomoyo_query_observers)) | |
1491 | return -EPERM; | |
1492 | va_start(args, fmt); | |
1493 | len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 32; | |
1494 | va_end(args); | |
1495 | header = tomoyo_init_audit_log(&len, r); | |
1496 | if (!header) | |
1497 | goto out; | |
1498 | tomoyo_query_entry = kzalloc(sizeof(*tomoyo_query_entry), GFP_NOFS); | |
1499 | if (!tomoyo_query_entry) | |
1500 | goto out; | |
1501 | tomoyo_query_entry->query = kzalloc(len, GFP_NOFS); | |
1502 | if (!tomoyo_query_entry->query) | |
1503 | goto out; | |
1504 | len = ksize(tomoyo_query_entry->query); | |
1505 | INIT_LIST_HEAD(&tomoyo_query_entry->list); | |
1506 | spin_lock(&tomoyo_query_list_lock); | |
1507 | if (tomoyo_quota_for_query && tomoyo_query_memory_size + len + | |
1508 | sizeof(*tomoyo_query_entry) >= tomoyo_quota_for_query) { | |
1509 | quota_exceeded = true; | |
1510 | } else { | |
1511 | tomoyo_query_memory_size += len + sizeof(*tomoyo_query_entry); | |
1512 | tomoyo_query_entry->serial = tomoyo_serial++; | |
1513 | } | |
1514 | spin_unlock(&tomoyo_query_list_lock); | |
1515 | if (quota_exceeded) | |
1516 | goto out; | |
1517 | pos = snprintf(tomoyo_query_entry->query, len - 1, "Q%u-%hu\n%s", | |
1518 | tomoyo_query_entry->serial, r->retry, header); | |
1519 | kfree(header); | |
1520 | header = NULL; | |
1521 | va_start(args, fmt); | |
1522 | vsnprintf(tomoyo_query_entry->query + pos, len - 1 - pos, fmt, args); | |
1523 | tomoyo_query_entry->query_len = strlen(tomoyo_query_entry->query) + 1; | |
1524 | va_end(args); | |
1525 | spin_lock(&tomoyo_query_list_lock); | |
1526 | list_add_tail(&tomoyo_query_entry->list, &tomoyo_query_list); | |
1527 | spin_unlock(&tomoyo_query_list_lock); | |
1528 | /* Give 10 seconds for supervisor's opinion. */ | |
1529 | for (tomoyo_query_entry->timer = 0; | |
1530 | atomic_read(&tomoyo_query_observers) && tomoyo_query_entry->timer < 100; | |
1531 | tomoyo_query_entry->timer++) { | |
1532 | wake_up(&tomoyo_query_wait); | |
1533 | set_current_state(TASK_INTERRUPTIBLE); | |
1534 | schedule_timeout(HZ / 10); | |
1535 | if (tomoyo_query_entry->answer) | |
1536 | break; | |
1537 | } | |
1538 | spin_lock(&tomoyo_query_list_lock); | |
1539 | list_del(&tomoyo_query_entry->list); | |
1540 | tomoyo_query_memory_size -= len + sizeof(*tomoyo_query_entry); | |
1541 | spin_unlock(&tomoyo_query_list_lock); | |
1542 | switch (tomoyo_query_entry->answer) { | |
1543 | case 3: /* Asked to retry by administrator. */ | |
1544 | error = TOMOYO_RETRY_REQUEST; | |
1545 | r->retry++; | |
1546 | break; | |
1547 | case 1: | |
1548 | /* Granted by administrator. */ | |
1549 | error = 0; | |
1550 | break; | |
1551 | case 0: | |
1552 | /* Timed out. */ | |
1553 | break; | |
1554 | default: | |
1555 | /* Rejected by administrator. */ | |
1556 | break; | |
1557 | } | |
1558 | out: | |
1559 | if (tomoyo_query_entry) | |
1560 | kfree(tomoyo_query_entry->query); | |
1561 | kfree(tomoyo_query_entry); | |
1562 | kfree(header); | |
1563 | return error; | |
1564 | } | |
1565 | ||
1566 | /** | |
1567 | * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query. | |
1568 | * | |
1569 | * @file: Pointer to "struct file". | |
1570 | * @wait: Pointer to "poll_table". | |
1571 | * | |
1572 | * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise. | |
1573 | * | |
1574 | * Waits for access requests which violated policy in enforcing mode. | |
1575 | */ | |
1576 | static int tomoyo_poll_query(struct file *file, poll_table *wait) | |
1577 | { | |
1578 | struct list_head *tmp; | |
1579 | bool found = false; | |
1580 | u8 i; | |
1581 | for (i = 0; i < 2; i++) { | |
1582 | spin_lock(&tomoyo_query_list_lock); | |
1583 | list_for_each(tmp, &tomoyo_query_list) { | |
1584 | struct tomoyo_query_entry *ptr | |
1585 | = list_entry(tmp, struct tomoyo_query_entry, | |
1586 | list); | |
1587 | if (ptr->answer) | |
1588 | continue; | |
1589 | found = true; | |
1590 | break; | |
1591 | } | |
1592 | spin_unlock(&tomoyo_query_list_lock); | |
1593 | if (found) | |
1594 | return POLLIN | POLLRDNORM; | |
1595 | if (i) | |
1596 | break; | |
1597 | poll_wait(file, &tomoyo_query_wait, wait); | |
1598 | } | |
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | /** | |
1603 | * tomoyo_read_query - Read access requests which violated policy in enforcing mode. | |
1604 | * | |
1605 | * @head: Pointer to "struct tomoyo_io_buffer". | |
17fcfbd9 | 1606 | */ |
8fbe71f0 | 1607 | static void tomoyo_read_query(struct tomoyo_io_buffer *head) |
17fcfbd9 TH |
1608 | { |
1609 | struct list_head *tmp; | |
1610 | int pos = 0; | |
1611 | int len = 0; | |
1612 | char *buf; | |
f23571e8 | 1613 | if (head->r.w_pos) |
8fbe71f0 | 1614 | return; |
17fcfbd9 TH |
1615 | if (head->read_buf) { |
1616 | kfree(head->read_buf); | |
1617 | head->read_buf = NULL; | |
17fcfbd9 TH |
1618 | } |
1619 | spin_lock(&tomoyo_query_list_lock); | |
1620 | list_for_each(tmp, &tomoyo_query_list) { | |
f23571e8 TH |
1621 | struct tomoyo_query_entry *ptr = |
1622 | list_entry(tmp, typeof(*ptr), list); | |
17fcfbd9 TH |
1623 | if (ptr->answer) |
1624 | continue; | |
f23571e8 | 1625 | if (pos++ != head->r.query_index) |
17fcfbd9 TH |
1626 | continue; |
1627 | len = ptr->query_len; | |
1628 | break; | |
1629 | } | |
1630 | spin_unlock(&tomoyo_query_list_lock); | |
1631 | if (!len) { | |
f23571e8 | 1632 | head->r.query_index = 0; |
8fbe71f0 | 1633 | return; |
17fcfbd9 TH |
1634 | } |
1635 | buf = kzalloc(len, GFP_NOFS); | |
1636 | if (!buf) | |
8fbe71f0 | 1637 | return; |
17fcfbd9 TH |
1638 | pos = 0; |
1639 | spin_lock(&tomoyo_query_list_lock); | |
1640 | list_for_each(tmp, &tomoyo_query_list) { | |
f23571e8 TH |
1641 | struct tomoyo_query_entry *ptr = |
1642 | list_entry(tmp, typeof(*ptr), list); | |
17fcfbd9 TH |
1643 | if (ptr->answer) |
1644 | continue; | |
f23571e8 | 1645 | if (pos++ != head->r.query_index) |
17fcfbd9 TH |
1646 | continue; |
1647 | /* | |
1648 | * Some query can be skipped because tomoyo_query_list | |
1649 | * can change, but I don't care. | |
1650 | */ | |
1651 | if (len == ptr->query_len) | |
1652 | memmove(buf, ptr->query, len); | |
1653 | break; | |
1654 | } | |
1655 | spin_unlock(&tomoyo_query_list_lock); | |
1656 | if (buf[0]) { | |
17fcfbd9 | 1657 | head->read_buf = buf; |
f23571e8 TH |
1658 | head->r.w[head->r.w_pos++] = buf; |
1659 | head->r.query_index++; | |
17fcfbd9 TH |
1660 | } else { |
1661 | kfree(buf); | |
1662 | } | |
17fcfbd9 TH |
1663 | } |
1664 | ||
1665 | /** | |
1666 | * tomoyo_write_answer - Write the supervisor's decision. | |
1667 | * | |
1668 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1669 | * | |
1670 | * Returns 0 on success, -EINVAL otherwise. | |
1671 | */ | |
1672 | static int tomoyo_write_answer(struct tomoyo_io_buffer *head) | |
1673 | { | |
1674 | char *data = head->write_buf; | |
1675 | struct list_head *tmp; | |
1676 | unsigned int serial; | |
1677 | unsigned int answer; | |
1678 | spin_lock(&tomoyo_query_list_lock); | |
1679 | list_for_each(tmp, &tomoyo_query_list) { | |
1680 | struct tomoyo_query_entry *ptr | |
1681 | = list_entry(tmp, struct tomoyo_query_entry, list); | |
1682 | ptr->timer = 0; | |
1683 | } | |
1684 | spin_unlock(&tomoyo_query_list_lock); | |
1685 | if (sscanf(data, "A%u=%u", &serial, &answer) != 2) | |
1686 | return -EINVAL; | |
1687 | spin_lock(&tomoyo_query_list_lock); | |
1688 | list_for_each(tmp, &tomoyo_query_list) { | |
1689 | struct tomoyo_query_entry *ptr | |
1690 | = list_entry(tmp, struct tomoyo_query_entry, list); | |
1691 | if (ptr->serial != serial) | |
1692 | continue; | |
1693 | if (!ptr->answer) | |
1694 | ptr->answer = answer; | |
1695 | break; | |
1696 | } | |
1697 | spin_unlock(&tomoyo_query_list_lock); | |
1698 | return 0; | |
1699 | } | |
1700 | ||
9590837b KT |
1701 | /** |
1702 | * tomoyo_read_version: Get version. | |
1703 | * | |
1704 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1705 | * | |
1706 | * Returns version information. | |
1707 | */ | |
8fbe71f0 | 1708 | static void tomoyo_read_version(struct tomoyo_io_buffer *head) |
9590837b | 1709 | { |
f23571e8 | 1710 | if (!head->r.eof) { |
57c2590f | 1711 | tomoyo_io_printf(head, "2.3.0-pre"); |
f23571e8 | 1712 | head->r.eof = true; |
9590837b | 1713 | } |
9590837b KT |
1714 | } |
1715 | ||
1716 | /** | |
1717 | * tomoyo_read_self_domain - Get the current process's domainname. | |
1718 | * | |
1719 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1720 | * | |
1721 | * Returns the current process's domainname. | |
1722 | */ | |
8fbe71f0 | 1723 | static void tomoyo_read_self_domain(struct tomoyo_io_buffer *head) |
9590837b | 1724 | { |
f23571e8 | 1725 | if (!head->r.eof) { |
9590837b KT |
1726 | /* |
1727 | * tomoyo_domain()->domainname != NULL | |
1728 | * because every process belongs to a domain and | |
1729 | * the domain's name cannot be NULL. | |
1730 | */ | |
1731 | tomoyo_io_printf(head, "%s", tomoyo_domain()->domainname->name); | |
f23571e8 | 1732 | head->r.eof = true; |
9590837b | 1733 | } |
9590837b KT |
1734 | } |
1735 | ||
1736 | /** | |
1737 | * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface. | |
1738 | * | |
1739 | * @type: Type of interface. | |
1740 | * @file: Pointer to "struct file". | |
1741 | * | |
1742 | * Associates policy handler and returns 0 on success, -ENOMEM otherwise. | |
fdb8ebb7 TH |
1743 | * |
1744 | * Caller acquires tomoyo_read_lock(). | |
9590837b | 1745 | */ |
c3ef1500 | 1746 | int tomoyo_open_control(const u8 type, struct file *file) |
9590837b | 1747 | { |
4e5d6f7e | 1748 | struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS); |
9590837b KT |
1749 | |
1750 | if (!head) | |
1751 | return -ENOMEM; | |
1752 | mutex_init(&head->io_sem); | |
17fcfbd9 | 1753 | head->type = type; |
9590837b KT |
1754 | switch (type) { |
1755 | case TOMOYO_DOMAINPOLICY: | |
1756 | /* /sys/kernel/security/tomoyo/domain_policy */ | |
1757 | head->write = tomoyo_write_domain_policy; | |
1758 | head->read = tomoyo_read_domain_policy; | |
1759 | break; | |
1760 | case TOMOYO_EXCEPTIONPOLICY: | |
1761 | /* /sys/kernel/security/tomoyo/exception_policy */ | |
1762 | head->write = tomoyo_write_exception_policy; | |
1763 | head->read = tomoyo_read_exception_policy; | |
1764 | break; | |
1765 | case TOMOYO_SELFDOMAIN: | |
1766 | /* /sys/kernel/security/tomoyo/self_domain */ | |
1767 | head->read = tomoyo_read_self_domain; | |
1768 | break; | |
1769 | case TOMOYO_DOMAIN_STATUS: | |
1770 | /* /sys/kernel/security/tomoyo/.domain_status */ | |
1771 | head->write = tomoyo_write_domain_profile; | |
1772 | head->read = tomoyo_read_domain_profile; | |
1773 | break; | |
1774 | case TOMOYO_PROCESS_STATUS: | |
1775 | /* /sys/kernel/security/tomoyo/.process_status */ | |
1776 | head->write = tomoyo_write_pid; | |
1777 | head->read = tomoyo_read_pid; | |
1778 | break; | |
1779 | case TOMOYO_VERSION: | |
1780 | /* /sys/kernel/security/tomoyo/version */ | |
1781 | head->read = tomoyo_read_version; | |
1782 | head->readbuf_size = 128; | |
1783 | break; | |
1784 | case TOMOYO_MEMINFO: | |
1785 | /* /sys/kernel/security/tomoyo/meminfo */ | |
1786 | head->write = tomoyo_write_memory_quota; | |
1787 | head->read = tomoyo_read_memory_counter; | |
1788 | head->readbuf_size = 512; | |
1789 | break; | |
1790 | case TOMOYO_PROFILE: | |
1791 | /* /sys/kernel/security/tomoyo/profile */ | |
1792 | head->write = tomoyo_write_profile; | |
1793 | head->read = tomoyo_read_profile; | |
1794 | break; | |
17fcfbd9 TH |
1795 | case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */ |
1796 | head->poll = tomoyo_poll_query; | |
1797 | head->write = tomoyo_write_answer; | |
1798 | head->read = tomoyo_read_query; | |
1799 | break; | |
9590837b KT |
1800 | case TOMOYO_MANAGER: |
1801 | /* /sys/kernel/security/tomoyo/manager */ | |
1802 | head->write = tomoyo_write_manager_policy; | |
1803 | head->read = tomoyo_read_manager_policy; | |
1804 | break; | |
1805 | } | |
1806 | if (!(file->f_mode & FMODE_READ)) { | |
1807 | /* | |
1808 | * No need to allocate read_buf since it is not opened | |
1809 | * for reading. | |
1810 | */ | |
1811 | head->read = NULL; | |
17fcfbd9 TH |
1812 | head->poll = NULL; |
1813 | } else if (!head->poll) { | |
1814 | /* Don't allocate read_buf for poll() access. */ | |
9590837b KT |
1815 | if (!head->readbuf_size) |
1816 | head->readbuf_size = 4096 * 2; | |
4e5d6f7e | 1817 | head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS); |
9590837b | 1818 | if (!head->read_buf) { |
8e2d39a1 | 1819 | kfree(head); |
9590837b KT |
1820 | return -ENOMEM; |
1821 | } | |
1822 | } | |
1823 | if (!(file->f_mode & FMODE_WRITE)) { | |
1824 | /* | |
1825 | * No need to allocate write_buf since it is not opened | |
1826 | * for writing. | |
1827 | */ | |
1828 | head->write = NULL; | |
1829 | } else if (head->write) { | |
1830 | head->writebuf_size = 4096 * 2; | |
4e5d6f7e | 1831 | head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS); |
9590837b | 1832 | if (!head->write_buf) { |
8e2d39a1 TH |
1833 | kfree(head->read_buf); |
1834 | kfree(head); | |
9590837b KT |
1835 | return -ENOMEM; |
1836 | } | |
1837 | } | |
17fcfbd9 TH |
1838 | if (type != TOMOYO_QUERY) |
1839 | head->reader_idx = tomoyo_read_lock(); | |
9590837b KT |
1840 | file->private_data = head; |
1841 | /* | |
1842 | * Call the handler now if the file is | |
1843 | * /sys/kernel/security/tomoyo/self_domain | |
1844 | * so that the user can use | |
1845 | * cat < /sys/kernel/security/tomoyo/self_domain" | |
1846 | * to know the current process's domainname. | |
1847 | */ | |
1848 | if (type == TOMOYO_SELFDOMAIN) | |
1849 | tomoyo_read_control(file, NULL, 0); | |
17fcfbd9 TH |
1850 | /* |
1851 | * If the file is /sys/kernel/security/tomoyo/query , increment the | |
1852 | * observer counter. | |
1853 | * The obserber counter is used by tomoyo_supervisor() to see if | |
1854 | * there is some process monitoring /sys/kernel/security/tomoyo/query. | |
1855 | */ | |
1856 | else if (type == TOMOYO_QUERY) | |
1857 | atomic_inc(&tomoyo_query_observers); | |
9590837b KT |
1858 | return 0; |
1859 | } | |
1860 | ||
17fcfbd9 TH |
1861 | /** |
1862 | * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface. | |
1863 | * | |
1864 | * @file: Pointer to "struct file". | |
1865 | * @wait: Pointer to "poll_table". | |
1866 | * | |
1867 | * Waits for read readiness. | |
1868 | * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd . | |
1869 | */ | |
1870 | int tomoyo_poll_control(struct file *file, poll_table *wait) | |
1871 | { | |
1872 | struct tomoyo_io_buffer *head = file->private_data; | |
1873 | if (!head->poll) | |
1874 | return -ENOSYS; | |
1875 | return head->poll(file, wait); | |
1876 | } | |
1877 | ||
9590837b KT |
1878 | /** |
1879 | * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface. | |
1880 | * | |
1881 | * @file: Pointer to "struct file". | |
1882 | * @buffer: Poiner to buffer to write to. | |
1883 | * @buffer_len: Size of @buffer. | |
1884 | * | |
1885 | * Returns bytes read on success, negative value otherwise. | |
fdb8ebb7 TH |
1886 | * |
1887 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1888 | */ |
c3ef1500 TH |
1889 | int tomoyo_read_control(struct file *file, char __user *buffer, |
1890 | const int buffer_len) | |
9590837b | 1891 | { |
f23571e8 | 1892 | int len; |
9590837b | 1893 | struct tomoyo_io_buffer *head = file->private_data; |
9590837b KT |
1894 | |
1895 | if (!head->read) | |
1896 | return -ENOSYS; | |
1897 | if (mutex_lock_interruptible(&head->io_sem)) | |
1898 | return -EINTR; | |
f23571e8 TH |
1899 | head->read_user_buf = buffer; |
1900 | head->read_user_buf_avail = buffer_len; | |
1901 | if (tomoyo_flush(head)) | |
1902 | /* Call the policy handler. */ | |
1903 | head->read(head); | |
1904 | tomoyo_flush(head); | |
1905 | len = head->read_user_buf - buffer; | |
9590837b KT |
1906 | mutex_unlock(&head->io_sem); |
1907 | return len; | |
1908 | } | |
1909 | ||
1910 | /** | |
1911 | * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface. | |
1912 | * | |
1913 | * @file: Pointer to "struct file". | |
1914 | * @buffer: Pointer to buffer to read from. | |
1915 | * @buffer_len: Size of @buffer. | |
1916 | * | |
1917 | * Returns @buffer_len on success, negative value otherwise. | |
fdb8ebb7 TH |
1918 | * |
1919 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1920 | */ |
c3ef1500 TH |
1921 | int tomoyo_write_control(struct file *file, const char __user *buffer, |
1922 | const int buffer_len) | |
9590837b KT |
1923 | { |
1924 | struct tomoyo_io_buffer *head = file->private_data; | |
1925 | int error = buffer_len; | |
1926 | int avail_len = buffer_len; | |
1927 | char *cp0 = head->write_buf; | |
1928 | ||
1929 | if (!head->write) | |
1930 | return -ENOSYS; | |
1931 | if (!access_ok(VERIFY_READ, buffer, buffer_len)) | |
1932 | return -EFAULT; | |
1933 | /* Don't allow updating policies by non manager programs. */ | |
1934 | if (head->write != tomoyo_write_pid && | |
1935 | head->write != tomoyo_write_domain_policy && | |
75093152 | 1936 | !tomoyo_policy_manager()) |
9590837b KT |
1937 | return -EPERM; |
1938 | if (mutex_lock_interruptible(&head->io_sem)) | |
1939 | return -EINTR; | |
1940 | /* Read a line and dispatch it to the policy handler. */ | |
1941 | while (avail_len > 0) { | |
1942 | char c; | |
1943 | if (head->write_avail >= head->writebuf_size - 1) { | |
1944 | error = -ENOMEM; | |
1945 | break; | |
1946 | } else if (get_user(c, buffer)) { | |
1947 | error = -EFAULT; | |
1948 | break; | |
1949 | } | |
1950 | buffer++; | |
1951 | avail_len--; | |
1952 | cp0[head->write_avail++] = c; | |
1953 | if (c != '\n') | |
1954 | continue; | |
1955 | cp0[head->write_avail - 1] = '\0'; | |
1956 | head->write_avail = 0; | |
1957 | tomoyo_normalize_line(cp0); | |
1958 | head->write(head); | |
1959 | } | |
1960 | mutex_unlock(&head->io_sem); | |
1961 | return error; | |
1962 | } | |
1963 | ||
1964 | /** | |
1965 | * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface. | |
1966 | * | |
1967 | * @file: Pointer to "struct file". | |
1968 | * | |
1969 | * Releases memory and returns 0. | |
fdb8ebb7 TH |
1970 | * |
1971 | * Caller looses tomoyo_read_lock(). | |
9590837b | 1972 | */ |
c3ef1500 | 1973 | int tomoyo_close_control(struct file *file) |
9590837b KT |
1974 | { |
1975 | struct tomoyo_io_buffer *head = file->private_data; | |
847b173e | 1976 | const bool is_write = !!head->write_buf; |
9590837b | 1977 | |
17fcfbd9 TH |
1978 | /* |
1979 | * If the file is /sys/kernel/security/tomoyo/query , decrement the | |
1980 | * observer counter. | |
1981 | */ | |
1982 | if (head->type == TOMOYO_QUERY) | |
1983 | atomic_dec(&tomoyo_query_observers); | |
1984 | else | |
1985 | tomoyo_read_unlock(head->reader_idx); | |
9590837b | 1986 | /* Release memory used for policy I/O. */ |
8e2d39a1 | 1987 | kfree(head->read_buf); |
9590837b | 1988 | head->read_buf = NULL; |
8e2d39a1 | 1989 | kfree(head->write_buf); |
9590837b | 1990 | head->write_buf = NULL; |
8e2d39a1 | 1991 | kfree(head); |
9590837b KT |
1992 | head = NULL; |
1993 | file->private_data = NULL; | |
847b173e TH |
1994 | if (is_write) |
1995 | tomoyo_run_gc(); | |
9590837b KT |
1996 | return 0; |
1997 | } | |
1998 | ||
9590837b | 1999 | /** |
c3ef1500 | 2000 | * tomoyo_check_profile - Check all profiles currently assigned to domains are defined. |
9590837b | 2001 | */ |
c3ef1500 | 2002 | void tomoyo_check_profile(void) |
9590837b | 2003 | { |
c3ef1500 TH |
2004 | struct tomoyo_domain_info *domain; |
2005 | const int idx = tomoyo_read_lock(); | |
2006 | tomoyo_policy_loaded = true; | |
2007 | /* Check all profiles currently assigned to domains are defined. */ | |
2008 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { | |
2009 | const u8 profile = domain->profile; | |
2010 | if (tomoyo_profile_ptr[profile]) | |
2011 | continue; | |
2012 | panic("Profile %u (used by '%s') not defined.\n", | |
2013 | profile, domain->domainname->name); | |
2014 | } | |
2015 | tomoyo_read_unlock(idx); | |
57c2590f TH |
2016 | if (tomoyo_profile_version != 20090903) |
2017 | panic("Profile version %u is not supported.\n", | |
2018 | tomoyo_profile_version); | |
2019 | printk(KERN_INFO "TOMOYO: 2.3.0-pre 2010/06/03\n"); | |
c3ef1500 | 2020 | printk(KERN_INFO "Mandatory Access Control activated.\n"); |
9590837b | 2021 | } |