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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 | * | |
6 | * Copyright (C) 2005-2009 NTT DATA CORPORATION | |
7 | * | |
39826a1e | 8 | * Version: 2.2.0 2009/04/01 |
9590837b KT |
9 | * |
10 | */ | |
11 | ||
12 | #include <linux/uaccess.h> | |
13 | #include <linux/security.h> | |
14 | #include <linux/hardirq.h> | |
9590837b | 15 | #include "common.h" |
9590837b | 16 | |
f737d95d TH |
17 | /* Lock for protecting policy. */ |
18 | DEFINE_MUTEX(tomoyo_policy_lock); | |
19 | ||
9590837b KT |
20 | /* Has loading policy done? */ |
21 | bool tomoyo_policy_loaded; | |
22 | ||
23 | /* String table for functionality that takes 4 modes. */ | |
24 | static const char *tomoyo_mode_4[4] = { | |
25 | "disabled", "learning", "permissive", "enforcing" | |
26 | }; | |
27 | /* String table for functionality that takes 2 modes. */ | |
28 | static const char *tomoyo_mode_2[4] = { | |
29 | "disabled", "enabled", "enabled", "enabled" | |
30 | }; | |
31 | ||
c3fa109a TH |
32 | /* |
33 | * tomoyo_control_array is a static data which contains | |
34 | * | |
35 | * (1) functionality name used by /sys/kernel/security/tomoyo/profile . | |
36 | * (2) initial values for "struct tomoyo_profile". | |
37 | * (3) max values for "struct tomoyo_profile". | |
38 | */ | |
9590837b KT |
39 | static struct { |
40 | const char *keyword; | |
41 | unsigned int current_value; | |
42 | const unsigned int max_value; | |
43 | } tomoyo_control_array[TOMOYO_MAX_CONTROL_INDEX] = { | |
44 | [TOMOYO_MAC_FOR_FILE] = { "MAC_FOR_FILE", 0, 3 }, | |
45 | [TOMOYO_MAX_ACCEPT_ENTRY] = { "MAX_ACCEPT_ENTRY", 2048, INT_MAX }, | |
46 | [TOMOYO_VERBOSE] = { "TOMOYO_VERBOSE", 1, 1 }, | |
47 | }; | |
48 | ||
c3fa109a TH |
49 | /* |
50 | * tomoyo_profile is a structure which is used for holding the mode of access | |
51 | * controls. TOMOYO has 4 modes: disabled, learning, permissive, enforcing. | |
52 | * An administrator can define up to 256 profiles. | |
53 | * The ->profile of "struct tomoyo_domain_info" is used for remembering | |
54 | * the profile's number (0 - 255) assigned to that domain. | |
55 | */ | |
9590837b KT |
56 | static struct tomoyo_profile { |
57 | unsigned int value[TOMOYO_MAX_CONTROL_INDEX]; | |
58 | const struct tomoyo_path_info *comment; | |
59 | } *tomoyo_profile_ptr[TOMOYO_MAX_PROFILES]; | |
60 | ||
61 | /* Permit policy management by non-root user? */ | |
62 | static bool tomoyo_manage_by_non_root; | |
63 | ||
64 | /* Utility functions. */ | |
65 | ||
66 | /* Open operation for /sys/kernel/security/tomoyo/ interface. */ | |
67 | static int tomoyo_open_control(const u8 type, struct file *file); | |
68 | /* Close /sys/kernel/security/tomoyo/ interface. */ | |
69 | static int tomoyo_close_control(struct file *file); | |
70 | /* Read operation for /sys/kernel/security/tomoyo/ interface. */ | |
71 | static int tomoyo_read_control(struct file *file, char __user *buffer, | |
72 | const int buffer_len); | |
73 | /* Write operation for /sys/kernel/security/tomoyo/ interface. */ | |
74 | static int tomoyo_write_control(struct file *file, const char __user *buffer, | |
75 | const int buffer_len); | |
76 | ||
77 | /** | |
78 | * tomoyo_is_byte_range - Check whether the string isa \ooo style octal value. | |
79 | * | |
80 | * @str: Pointer to the string. | |
81 | * | |
82 | * Returns true if @str is a \ooo style octal value, false otherwise. | |
83 | * | |
84 | * TOMOYO uses \ooo style representation for 0x01 - 0x20 and 0x7F - 0xFF. | |
85 | * This function verifies that \ooo is in valid range. | |
86 | */ | |
87 | static inline bool tomoyo_is_byte_range(const char *str) | |
88 | { | |
89 | return *str >= '0' && *str++ <= '3' && | |
90 | *str >= '0' && *str++ <= '7' && | |
91 | *str >= '0' && *str <= '7'; | |
92 | } | |
93 | ||
94 | /** | |
95 | * tomoyo_is_alphabet_char - Check whether the character is an alphabet. | |
96 | * | |
97 | * @c: The character to check. | |
98 | * | |
99 | * Returns true if @c is an alphabet character, false otherwise. | |
100 | */ | |
101 | static inline bool tomoyo_is_alphabet_char(const char c) | |
102 | { | |
103 | return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'); | |
104 | } | |
105 | ||
106 | /** | |
107 | * tomoyo_make_byte - Make byte value from three octal characters. | |
108 | * | |
109 | * @c1: The first character. | |
110 | * @c2: The second character. | |
111 | * @c3: The third character. | |
112 | * | |
113 | * Returns byte value. | |
114 | */ | |
115 | static inline u8 tomoyo_make_byte(const u8 c1, const u8 c2, const u8 c3) | |
116 | { | |
117 | return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0'); | |
118 | } | |
119 | ||
120 | /** | |
121 | * tomoyo_str_starts - Check whether the given string starts with the given keyword. | |
122 | * | |
123 | * @src: Pointer to pointer to the string. | |
124 | * @find: Pointer to the keyword. | |
125 | * | |
126 | * Returns true if @src starts with @find, false otherwise. | |
127 | * | |
128 | * The @src is updated to point the first character after the @find | |
129 | * if @src starts with @find. | |
130 | */ | |
131 | static bool tomoyo_str_starts(char **src, const char *find) | |
132 | { | |
133 | const int len = strlen(find); | |
134 | char *tmp = *src; | |
135 | ||
136 | if (strncmp(tmp, find, len)) | |
137 | return false; | |
138 | tmp += len; | |
139 | *src = tmp; | |
140 | return true; | |
141 | } | |
142 | ||
143 | /** | |
144 | * tomoyo_normalize_line - Format string. | |
145 | * | |
146 | * @buffer: The line to normalize. | |
147 | * | |
148 | * Leading and trailing whitespaces are removed. | |
149 | * Multiple whitespaces are packed into single space. | |
150 | * | |
151 | * Returns nothing. | |
152 | */ | |
153 | static void tomoyo_normalize_line(unsigned char *buffer) | |
154 | { | |
155 | unsigned char *sp = buffer; | |
156 | unsigned char *dp = buffer; | |
157 | bool first = true; | |
158 | ||
159 | while (tomoyo_is_invalid(*sp)) | |
160 | sp++; | |
161 | while (*sp) { | |
162 | if (!first) | |
163 | *dp++ = ' '; | |
164 | first = false; | |
165 | while (tomoyo_is_valid(*sp)) | |
166 | *dp++ = *sp++; | |
167 | while (tomoyo_is_invalid(*sp)) | |
168 | sp++; | |
169 | } | |
170 | *dp = '\0'; | |
171 | } | |
172 | ||
173 | /** | |
174 | * tomoyo_is_correct_path - Validate a pathname. | |
175 | * @filename: The pathname to check. | |
176 | * @start_type: Should the pathname start with '/'? | |
177 | * 1 = must / -1 = must not / 0 = don't care | |
178 | * @pattern_type: Can the pathname contain a wildcard? | |
179 | * 1 = must / -1 = must not / 0 = don't care | |
180 | * @end_type: Should the pathname end with '/'? | |
181 | * 1 = must / -1 = must not / 0 = don't care | |
9590837b KT |
182 | * |
183 | * Check whether the given filename follows the naming rules. | |
184 | * Returns true if @filename follows the naming rules, false otherwise. | |
185 | */ | |
186 | bool tomoyo_is_correct_path(const char *filename, const s8 start_type, | |
17080008 | 187 | const s8 pattern_type, const s8 end_type) |
9590837b | 188 | { |
7539cf4b TH |
189 | const char *const start = filename; |
190 | bool in_repetition = false; | |
9590837b KT |
191 | bool contains_pattern = false; |
192 | unsigned char c; | |
193 | unsigned char d; | |
194 | unsigned char e; | |
9590837b KT |
195 | |
196 | if (!filename) | |
197 | goto out; | |
198 | c = *filename; | |
199 | if (start_type == 1) { /* Must start with '/' */ | |
200 | if (c != '/') | |
201 | goto out; | |
202 | } else if (start_type == -1) { /* Must not start with '/' */ | |
203 | if (c == '/') | |
204 | goto out; | |
205 | } | |
206 | if (c) | |
207 | c = *(filename + strlen(filename) - 1); | |
208 | if (end_type == 1) { /* Must end with '/' */ | |
209 | if (c != '/') | |
210 | goto out; | |
211 | } else if (end_type == -1) { /* Must not end with '/' */ | |
212 | if (c == '/') | |
213 | goto out; | |
214 | } | |
7539cf4b TH |
215 | while (1) { |
216 | c = *filename++; | |
217 | if (!c) | |
218 | break; | |
9590837b | 219 | if (c == '\\') { |
7539cf4b TH |
220 | c = *filename++; |
221 | switch (c) { | |
9590837b KT |
222 | case '\\': /* "\\" */ |
223 | continue; | |
224 | case '$': /* "\$" */ | |
225 | case '+': /* "\+" */ | |
226 | case '?': /* "\?" */ | |
227 | case '*': /* "\*" */ | |
228 | case '@': /* "\@" */ | |
229 | case 'x': /* "\x" */ | |
230 | case 'X': /* "\X" */ | |
231 | case 'a': /* "\a" */ | |
232 | case 'A': /* "\A" */ | |
233 | case '-': /* "\-" */ | |
234 | if (pattern_type == -1) | |
235 | break; /* Must not contain pattern */ | |
236 | contains_pattern = true; | |
237 | continue; | |
7539cf4b TH |
238 | case '{': /* "/\{" */ |
239 | if (filename - 3 < start || | |
240 | *(filename - 3) != '/') | |
241 | break; | |
242 | if (pattern_type == -1) | |
243 | break; /* Must not contain pattern */ | |
244 | contains_pattern = true; | |
245 | in_repetition = true; | |
246 | continue; | |
247 | case '}': /* "\}/" */ | |
248 | if (*filename != '/') | |
249 | break; | |
250 | if (!in_repetition) | |
251 | break; | |
252 | in_repetition = false; | |
253 | continue; | |
9590837b KT |
254 | case '0': /* "\ooo" */ |
255 | case '1': | |
256 | case '2': | |
257 | case '3': | |
258 | d = *filename++; | |
259 | if (d < '0' || d > '7') | |
260 | break; | |
261 | e = *filename++; | |
262 | if (e < '0' || e > '7') | |
263 | break; | |
264 | c = tomoyo_make_byte(c, d, e); | |
265 | if (tomoyo_is_invalid(c)) | |
266 | continue; /* pattern is not \000 */ | |
267 | } | |
268 | goto out; | |
7539cf4b TH |
269 | } else if (in_repetition && c == '/') { |
270 | goto out; | |
9590837b KT |
271 | } else if (tomoyo_is_invalid(c)) { |
272 | goto out; | |
273 | } | |
274 | } | |
275 | if (pattern_type == 1) { /* Must contain pattern */ | |
276 | if (!contains_pattern) | |
277 | goto out; | |
278 | } | |
7539cf4b TH |
279 | if (in_repetition) |
280 | goto out; | |
9590837b KT |
281 | return true; |
282 | out: | |
9590837b KT |
283 | return false; |
284 | } | |
285 | ||
286 | /** | |
287 | * tomoyo_is_correct_domain - Check whether the given domainname follows the naming rules. | |
288 | * @domainname: The domainname to check. | |
9590837b KT |
289 | * |
290 | * Returns true if @domainname follows the naming rules, false otherwise. | |
291 | */ | |
17080008 | 292 | bool tomoyo_is_correct_domain(const unsigned char *domainname) |
9590837b KT |
293 | { |
294 | unsigned char c; | |
295 | unsigned char d; | |
296 | unsigned char e; | |
9590837b KT |
297 | |
298 | if (!domainname || strncmp(domainname, TOMOYO_ROOT_NAME, | |
299 | TOMOYO_ROOT_NAME_LEN)) | |
300 | goto out; | |
301 | domainname += TOMOYO_ROOT_NAME_LEN; | |
302 | if (!*domainname) | |
303 | return true; | |
304 | do { | |
305 | if (*domainname++ != ' ') | |
306 | goto out; | |
307 | if (*domainname++ != '/') | |
308 | goto out; | |
309 | while ((c = *domainname) != '\0' && c != ' ') { | |
310 | domainname++; | |
311 | if (c == '\\') { | |
312 | c = *domainname++; | |
313 | switch ((c)) { | |
314 | case '\\': /* "\\" */ | |
315 | continue; | |
316 | case '0': /* "\ooo" */ | |
317 | case '1': | |
318 | case '2': | |
319 | case '3': | |
320 | d = *domainname++; | |
321 | if (d < '0' || d > '7') | |
322 | break; | |
323 | e = *domainname++; | |
324 | if (e < '0' || e > '7') | |
325 | break; | |
326 | c = tomoyo_make_byte(c, d, e); | |
327 | if (tomoyo_is_invalid(c)) | |
328 | /* pattern is not \000 */ | |
329 | continue; | |
330 | } | |
331 | goto out; | |
332 | } else if (tomoyo_is_invalid(c)) { | |
333 | goto out; | |
334 | } | |
335 | } | |
336 | } while (*domainname); | |
337 | return true; | |
338 | out: | |
9590837b KT |
339 | return false; |
340 | } | |
341 | ||
342 | /** | |
343 | * tomoyo_is_domain_def - Check whether the given token can be a domainname. | |
344 | * | |
345 | * @buffer: The token to check. | |
346 | * | |
347 | * Returns true if @buffer possibly be a domainname, false otherwise. | |
348 | */ | |
349 | bool tomoyo_is_domain_def(const unsigned char *buffer) | |
350 | { | |
351 | return !strncmp(buffer, TOMOYO_ROOT_NAME, TOMOYO_ROOT_NAME_LEN); | |
352 | } | |
353 | ||
354 | /** | |
355 | * tomoyo_find_domain - Find a domain by the given name. | |
356 | * | |
357 | * @domainname: The domainname to find. | |
358 | * | |
9590837b | 359 | * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise. |
fdb8ebb7 TH |
360 | * |
361 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
362 | */ |
363 | struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname) | |
364 | { | |
365 | struct tomoyo_domain_info *domain; | |
366 | struct tomoyo_path_info name; | |
367 | ||
368 | name.name = domainname; | |
369 | tomoyo_fill_path_info(&name); | |
fdb8ebb7 | 370 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
9590837b KT |
371 | if (!domain->is_deleted && |
372 | !tomoyo_pathcmp(&name, domain->domainname)) | |
373 | return domain; | |
374 | } | |
375 | return NULL; | |
376 | } | |
377 | ||
9590837b KT |
378 | /** |
379 | * tomoyo_const_part_length - Evaluate the initial length without a pattern in a token. | |
380 | * | |
381 | * @filename: The string to evaluate. | |
382 | * | |
383 | * Returns the initial length without a pattern in @filename. | |
384 | */ | |
385 | static int tomoyo_const_part_length(const char *filename) | |
386 | { | |
387 | char c; | |
388 | int len = 0; | |
389 | ||
390 | if (!filename) | |
391 | return 0; | |
392 | while ((c = *filename++) != '\0') { | |
393 | if (c != '\\') { | |
394 | len++; | |
395 | continue; | |
396 | } | |
397 | c = *filename++; | |
398 | switch (c) { | |
399 | case '\\': /* "\\" */ | |
400 | len += 2; | |
401 | continue; | |
402 | case '0': /* "\ooo" */ | |
403 | case '1': | |
404 | case '2': | |
405 | case '3': | |
406 | c = *filename++; | |
407 | if (c < '0' || c > '7') | |
408 | break; | |
409 | c = *filename++; | |
410 | if (c < '0' || c > '7') | |
411 | break; | |
412 | len += 4; | |
413 | continue; | |
414 | } | |
415 | break; | |
416 | } | |
417 | return len; | |
418 | } | |
419 | ||
420 | /** | |
421 | * tomoyo_fill_path_info - Fill in "struct tomoyo_path_info" members. | |
422 | * | |
423 | * @ptr: Pointer to "struct tomoyo_path_info" to fill in. | |
424 | * | |
425 | * The caller sets "struct tomoyo_path_info"->name. | |
426 | */ | |
427 | void tomoyo_fill_path_info(struct tomoyo_path_info *ptr) | |
428 | { | |
429 | const char *name = ptr->name; | |
430 | const int len = strlen(name); | |
431 | ||
9590837b KT |
432 | ptr->const_len = tomoyo_const_part_length(name); |
433 | ptr->is_dir = len && (name[len - 1] == '/'); | |
434 | ptr->is_patterned = (ptr->const_len < len); | |
435 | ptr->hash = full_name_hash(name, len); | |
9590837b KT |
436 | } |
437 | ||
438 | /** | |
7539cf4b | 439 | * tomoyo_file_matches_pattern2 - Pattern matching without '/' character |
9590837b KT |
440 | * and "\-" pattern. |
441 | * | |
442 | * @filename: The start of string to check. | |
443 | * @filename_end: The end of string to check. | |
444 | * @pattern: The start of pattern to compare. | |
445 | * @pattern_end: The end of pattern to compare. | |
446 | * | |
447 | * Returns true if @filename matches @pattern, false otherwise. | |
448 | */ | |
7539cf4b TH |
449 | static bool tomoyo_file_matches_pattern2(const char *filename, |
450 | const char *filename_end, | |
451 | const char *pattern, | |
452 | const char *pattern_end) | |
9590837b KT |
453 | { |
454 | while (filename < filename_end && pattern < pattern_end) { | |
455 | char c; | |
456 | if (*pattern != '\\') { | |
457 | if (*filename++ != *pattern++) | |
458 | return false; | |
459 | continue; | |
460 | } | |
461 | c = *filename; | |
462 | pattern++; | |
463 | switch (*pattern) { | |
464 | int i; | |
465 | int j; | |
466 | case '?': | |
467 | if (c == '/') { | |
468 | return false; | |
469 | } else if (c == '\\') { | |
470 | if (filename[1] == '\\') | |
471 | filename++; | |
472 | else if (tomoyo_is_byte_range(filename + 1)) | |
473 | filename += 3; | |
474 | else | |
475 | return false; | |
476 | } | |
477 | break; | |
478 | case '\\': | |
479 | if (c != '\\') | |
480 | return false; | |
481 | if (*++filename != '\\') | |
482 | return false; | |
483 | break; | |
484 | case '+': | |
485 | if (!isdigit(c)) | |
486 | return false; | |
487 | break; | |
488 | case 'x': | |
489 | if (!isxdigit(c)) | |
490 | return false; | |
491 | break; | |
492 | case 'a': | |
493 | if (!tomoyo_is_alphabet_char(c)) | |
494 | return false; | |
495 | break; | |
496 | case '0': | |
497 | case '1': | |
498 | case '2': | |
499 | case '3': | |
500 | if (c == '\\' && tomoyo_is_byte_range(filename + 1) | |
501 | && strncmp(filename + 1, pattern, 3) == 0) { | |
502 | filename += 3; | |
503 | pattern += 2; | |
504 | break; | |
505 | } | |
506 | return false; /* Not matched. */ | |
507 | case '*': | |
508 | case '@': | |
509 | for (i = 0; i <= filename_end - filename; i++) { | |
7539cf4b | 510 | if (tomoyo_file_matches_pattern2( |
9590837b KT |
511 | filename + i, filename_end, |
512 | pattern + 1, pattern_end)) | |
513 | return true; | |
514 | c = filename[i]; | |
515 | if (c == '.' && *pattern == '@') | |
516 | break; | |
517 | if (c != '\\') | |
518 | continue; | |
519 | if (filename[i + 1] == '\\') | |
520 | i++; | |
521 | else if (tomoyo_is_byte_range(filename + i + 1)) | |
522 | i += 3; | |
523 | else | |
524 | break; /* Bad pattern. */ | |
525 | } | |
526 | return false; /* Not matched. */ | |
527 | default: | |
528 | j = 0; | |
529 | c = *pattern; | |
530 | if (c == '$') { | |
531 | while (isdigit(filename[j])) | |
532 | j++; | |
533 | } else if (c == 'X') { | |
534 | while (isxdigit(filename[j])) | |
535 | j++; | |
536 | } else if (c == 'A') { | |
537 | while (tomoyo_is_alphabet_char(filename[j])) | |
538 | j++; | |
539 | } | |
540 | for (i = 1; i <= j; i++) { | |
7539cf4b | 541 | if (tomoyo_file_matches_pattern2( |
9590837b KT |
542 | filename + i, filename_end, |
543 | pattern + 1, pattern_end)) | |
544 | return true; | |
545 | } | |
546 | return false; /* Not matched or bad pattern. */ | |
547 | } | |
548 | filename++; | |
549 | pattern++; | |
550 | } | |
551 | while (*pattern == '\\' && | |
552 | (*(pattern + 1) == '*' || *(pattern + 1) == '@')) | |
553 | pattern += 2; | |
554 | return filename == filename_end && pattern == pattern_end; | |
555 | } | |
556 | ||
557 | /** | |
7539cf4b | 558 | * tomoyo_file_matches_pattern - Pattern matching without without '/' character. |
9590837b KT |
559 | * |
560 | * @filename: The start of string to check. | |
561 | * @filename_end: The end of string to check. | |
562 | * @pattern: The start of pattern to compare. | |
563 | * @pattern_end: The end of pattern to compare. | |
564 | * | |
565 | * Returns true if @filename matches @pattern, false otherwise. | |
566 | */ | |
7539cf4b | 567 | static bool tomoyo_file_matches_pattern(const char *filename, |
9590837b KT |
568 | const char *filename_end, |
569 | const char *pattern, | |
570 | const char *pattern_end) | |
571 | { | |
572 | const char *pattern_start = pattern; | |
573 | bool first = true; | |
574 | bool result; | |
575 | ||
576 | while (pattern < pattern_end - 1) { | |
577 | /* Split at "\-" pattern. */ | |
578 | if (*pattern++ != '\\' || *pattern++ != '-') | |
579 | continue; | |
7539cf4b TH |
580 | result = tomoyo_file_matches_pattern2(filename, |
581 | filename_end, | |
582 | pattern_start, | |
583 | pattern - 2); | |
9590837b KT |
584 | if (first) |
585 | result = !result; | |
586 | if (result) | |
587 | return false; | |
588 | first = false; | |
589 | pattern_start = pattern; | |
590 | } | |
7539cf4b TH |
591 | result = tomoyo_file_matches_pattern2(filename, filename_end, |
592 | pattern_start, pattern_end); | |
9590837b KT |
593 | return first ? result : !result; |
594 | } | |
595 | ||
7539cf4b TH |
596 | /** |
597 | * tomoyo_path_matches_pattern2 - Do pathname pattern matching. | |
598 | * | |
599 | * @f: The start of string to check. | |
600 | * @p: The start of pattern to compare. | |
601 | * | |
602 | * Returns true if @f matches @p, false otherwise. | |
603 | */ | |
604 | static bool tomoyo_path_matches_pattern2(const char *f, const char *p) | |
605 | { | |
606 | const char *f_delimiter; | |
607 | const char *p_delimiter; | |
608 | ||
609 | while (*f && *p) { | |
610 | f_delimiter = strchr(f, '/'); | |
611 | if (!f_delimiter) | |
612 | f_delimiter = f + strlen(f); | |
613 | p_delimiter = strchr(p, '/'); | |
614 | if (!p_delimiter) | |
615 | p_delimiter = p + strlen(p); | |
616 | if (*p == '\\' && *(p + 1) == '{') | |
617 | goto recursive; | |
618 | if (!tomoyo_file_matches_pattern(f, f_delimiter, p, | |
619 | p_delimiter)) | |
620 | return false; | |
621 | f = f_delimiter; | |
622 | if (*f) | |
623 | f++; | |
624 | p = p_delimiter; | |
625 | if (*p) | |
626 | p++; | |
627 | } | |
628 | /* Ignore trailing "\*" and "\@" in @pattern. */ | |
629 | while (*p == '\\' && | |
630 | (*(p + 1) == '*' || *(p + 1) == '@')) | |
631 | p += 2; | |
632 | return !*f && !*p; | |
633 | recursive: | |
634 | /* | |
635 | * The "\{" pattern is permitted only after '/' character. | |
636 | * This guarantees that below "*(p - 1)" is safe. | |
637 | * Also, the "\}" pattern is permitted only before '/' character | |
638 | * so that "\{" + "\}" pair will not break the "\-" operator. | |
639 | */ | |
640 | if (*(p - 1) != '/' || p_delimiter <= p + 3 || *p_delimiter != '/' || | |
641 | *(p_delimiter - 1) != '}' || *(p_delimiter - 2) != '\\') | |
642 | return false; /* Bad pattern. */ | |
643 | do { | |
644 | /* Compare current component with pattern. */ | |
645 | if (!tomoyo_file_matches_pattern(f, f_delimiter, p + 2, | |
646 | p_delimiter - 2)) | |
647 | break; | |
648 | /* Proceed to next component. */ | |
649 | f = f_delimiter; | |
650 | if (!*f) | |
651 | break; | |
652 | f++; | |
653 | /* Continue comparison. */ | |
654 | if (tomoyo_path_matches_pattern2(f, p_delimiter + 1)) | |
655 | return true; | |
656 | f_delimiter = strchr(f, '/'); | |
657 | } while (f_delimiter); | |
658 | return false; /* Not matched. */ | |
659 | } | |
660 | ||
9590837b KT |
661 | /** |
662 | * tomoyo_path_matches_pattern - Check whether the given filename matches the given pattern. | |
7539cf4b | 663 | * |
9590837b KT |
664 | * @filename: The filename to check. |
665 | * @pattern: The pattern to compare. | |
666 | * | |
667 | * Returns true if matches, false otherwise. | |
668 | * | |
669 | * The following patterns are available. | |
670 | * \\ \ itself. | |
671 | * \ooo Octal representation of a byte. | |
7539cf4b TH |
672 | * \* Zero or more repetitions of characters other than '/'. |
673 | * \@ Zero or more repetitions of characters other than '/' or '.'. | |
9590837b | 674 | * \? 1 byte character other than '/'. |
7539cf4b | 675 | * \$ One or more repetitions of decimal digits. |
9590837b | 676 | * \+ 1 decimal digit. |
7539cf4b | 677 | * \X One or more repetitions of hexadecimal digits. |
9590837b | 678 | * \x 1 hexadecimal digit. |
7539cf4b | 679 | * \A One or more repetitions of alphabet characters. |
9590837b | 680 | * \a 1 alphabet character. |
7539cf4b | 681 | * |
9590837b | 682 | * \- Subtraction operator. |
7539cf4b TH |
683 | * |
684 | * /\{dir\}/ '/' + 'One or more repetitions of dir/' (e.g. /dir/ /dir/dir/ | |
685 | * /dir/dir/dir/ ). | |
9590837b KT |
686 | */ |
687 | bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename, | |
688 | const struct tomoyo_path_info *pattern) | |
689 | { | |
9590837b KT |
690 | const char *f = filename->name; |
691 | const char *p = pattern->name; | |
692 | const int len = pattern->const_len; | |
693 | ||
694 | /* If @pattern doesn't contain pattern, I can use strcmp(). */ | |
695 | if (!pattern->is_patterned) | |
696 | return !tomoyo_pathcmp(filename, pattern); | |
7539cf4b TH |
697 | /* Don't compare directory and non-directory. */ |
698 | if (filename->is_dir != pattern->is_dir) | |
9590837b KT |
699 | return false; |
700 | /* Compare the initial length without patterns. */ | |
701 | if (strncmp(f, p, len)) | |
702 | return false; | |
703 | f += len; | |
704 | p += len; | |
7539cf4b | 705 | return tomoyo_path_matches_pattern2(f, p); |
9590837b KT |
706 | } |
707 | ||
708 | /** | |
709 | * tomoyo_io_printf - Transactional printf() to "struct tomoyo_io_buffer" structure. | |
710 | * | |
711 | * @head: Pointer to "struct tomoyo_io_buffer". | |
712 | * @fmt: The printf()'s format string, followed by parameters. | |
713 | * | |
714 | * Returns true if output was written, false otherwise. | |
715 | * | |
716 | * The snprintf() will truncate, but tomoyo_io_printf() won't. | |
717 | */ | |
718 | bool tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...) | |
719 | { | |
720 | va_list args; | |
721 | int len; | |
722 | int pos = head->read_avail; | |
723 | int size = head->readbuf_size - pos; | |
724 | ||
725 | if (size <= 0) | |
726 | return false; | |
727 | va_start(args, fmt); | |
728 | len = vsnprintf(head->read_buf + pos, size, fmt, args); | |
729 | va_end(args); | |
730 | if (pos + len >= head->readbuf_size) | |
731 | return false; | |
732 | head->read_avail += len; | |
733 | return true; | |
734 | } | |
735 | ||
736 | /** | |
737 | * tomoyo_get_exe - Get tomoyo_realpath() of current process. | |
738 | * | |
739 | * Returns the tomoyo_realpath() of current process on success, NULL otherwise. | |
740 | * | |
8e2d39a1 | 741 | * This function uses kzalloc(), so the caller must call kfree() |
9590837b KT |
742 | * if this function didn't return NULL. |
743 | */ | |
744 | static const char *tomoyo_get_exe(void) | |
745 | { | |
746 | struct mm_struct *mm = current->mm; | |
747 | struct vm_area_struct *vma; | |
748 | const char *cp = NULL; | |
749 | ||
750 | if (!mm) | |
751 | return NULL; | |
752 | down_read(&mm->mmap_sem); | |
753 | for (vma = mm->mmap; vma; vma = vma->vm_next) { | |
754 | if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) { | |
755 | cp = tomoyo_realpath_from_path(&vma->vm_file->f_path); | |
756 | break; | |
757 | } | |
758 | } | |
759 | up_read(&mm->mmap_sem); | |
760 | return cp; | |
761 | } | |
762 | ||
763 | /** | |
764 | * tomoyo_get_msg - Get warning message. | |
765 | * | |
766 | * @is_enforce: Is it enforcing mode? | |
767 | * | |
768 | * Returns "ERROR" or "WARNING". | |
769 | */ | |
770 | const char *tomoyo_get_msg(const bool is_enforce) | |
771 | { | |
772 | if (is_enforce) | |
773 | return "ERROR"; | |
774 | else | |
775 | return "WARNING"; | |
776 | } | |
777 | ||
778 | /** | |
779 | * tomoyo_check_flags - Check mode for specified functionality. | |
780 | * | |
781 | * @domain: Pointer to "struct tomoyo_domain_info". | |
782 | * @index: The functionality to check mode. | |
783 | * | |
784 | * TOMOYO checks only process context. | |
785 | * This code disables TOMOYO's enforcement in case the function is called from | |
786 | * interrupt context. | |
787 | */ | |
788 | unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain, | |
789 | const u8 index) | |
790 | { | |
791 | const u8 profile = domain->profile; | |
792 | ||
793 | if (WARN_ON(in_interrupt())) | |
794 | return 0; | |
795 | return tomoyo_policy_loaded && index < TOMOYO_MAX_CONTROL_INDEX | |
796 | #if TOMOYO_MAX_PROFILES != 256 | |
797 | && profile < TOMOYO_MAX_PROFILES | |
798 | #endif | |
799 | && tomoyo_profile_ptr[profile] ? | |
800 | tomoyo_profile_ptr[profile]->value[index] : 0; | |
801 | } | |
802 | ||
803 | /** | |
804 | * tomoyo_verbose_mode - Check whether TOMOYO is verbose mode. | |
805 | * | |
806 | * @domain: Pointer to "struct tomoyo_domain_info". | |
807 | * | |
808 | * Returns true if domain policy violation warning should be printed to | |
809 | * console. | |
810 | */ | |
811 | bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain) | |
812 | { | |
813 | return tomoyo_check_flags(domain, TOMOYO_VERBOSE) != 0; | |
814 | } | |
815 | ||
816 | /** | |
817 | * tomoyo_domain_quota_is_ok - Check for domain's quota. | |
818 | * | |
819 | * @domain: Pointer to "struct tomoyo_domain_info". | |
820 | * | |
821 | * Returns true if the domain is not exceeded quota, false otherwise. | |
fdb8ebb7 TH |
822 | * |
823 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
824 | */ |
825 | bool tomoyo_domain_quota_is_ok(struct tomoyo_domain_info * const domain) | |
826 | { | |
827 | unsigned int count = 0; | |
828 | struct tomoyo_acl_info *ptr; | |
829 | ||
830 | if (!domain) | |
831 | return true; | |
fdb8ebb7 | 832 | list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
ea13ddba | 833 | switch (ptr->type) { |
7ef61233 | 834 | struct tomoyo_path_acl *acl; |
937bf613 TH |
835 | u32 perm; |
836 | u8 i; | |
7ef61233 TH |
837 | case TOMOYO_TYPE_PATH_ACL: |
838 | acl = container_of(ptr, struct tomoyo_path_acl, head); | |
937bf613 | 839 | perm = acl->perm | (((u32) acl->perm_high) << 16); |
7ef61233 | 840 | for (i = 0; i < TOMOYO_MAX_PATH_OPERATION; i++) |
937bf613 TH |
841 | if (perm & (1 << i)) |
842 | count++; | |
7ef61233 | 843 | if (perm & (1 << TOMOYO_TYPE_READ_WRITE)) |
937bf613 | 844 | count -= 2; |
9590837b | 845 | break; |
7ef61233 TH |
846 | case TOMOYO_TYPE_PATH2_ACL: |
847 | perm = container_of(ptr, struct tomoyo_path2_acl, head) | |
848 | ->perm; | |
849 | for (i = 0; i < TOMOYO_MAX_PATH2_OPERATION; i++) | |
937bf613 TH |
850 | if (perm & (1 << i)) |
851 | count++; | |
9590837b KT |
852 | break; |
853 | } | |
854 | } | |
9590837b KT |
855 | if (count < tomoyo_check_flags(domain, TOMOYO_MAX_ACCEPT_ENTRY)) |
856 | return true; | |
857 | if (!domain->quota_warned) { | |
858 | domain->quota_warned = true; | |
859 | printk(KERN_WARNING "TOMOYO-WARNING: " | |
860 | "Domain '%s' has so many ACLs to hold. " | |
861 | "Stopped learning mode.\n", domain->domainname->name); | |
862 | } | |
863 | return false; | |
864 | } | |
865 | ||
866 | /** | |
867 | * tomoyo_find_or_assign_new_profile - Create a new profile. | |
868 | * | |
869 | * @profile: Profile number to create. | |
870 | * | |
871 | * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise. | |
872 | */ | |
873 | static struct tomoyo_profile *tomoyo_find_or_assign_new_profile(const unsigned | |
874 | int profile) | |
875 | { | |
876 | static DEFINE_MUTEX(lock); | |
877 | struct tomoyo_profile *ptr = NULL; | |
878 | int i; | |
879 | ||
880 | if (profile >= TOMOYO_MAX_PROFILES) | |
881 | return NULL; | |
9590837b KT |
882 | mutex_lock(&lock); |
883 | ptr = tomoyo_profile_ptr[profile]; | |
884 | if (ptr) | |
885 | goto ok; | |
cd7bec6a TH |
886 | ptr = kmalloc(sizeof(*ptr), GFP_KERNEL); |
887 | if (!tomoyo_memory_ok(ptr)) { | |
888 | kfree(ptr); | |
9590837b | 889 | goto ok; |
cd7bec6a | 890 | } |
9590837b KT |
891 | for (i = 0; i < TOMOYO_MAX_CONTROL_INDEX; i++) |
892 | ptr->value[i] = tomoyo_control_array[i].current_value; | |
893 | mb(); /* Avoid out-of-order execution. */ | |
894 | tomoyo_profile_ptr[profile] = ptr; | |
895 | ok: | |
896 | mutex_unlock(&lock); | |
9590837b KT |
897 | return ptr; |
898 | } | |
899 | ||
900 | /** | |
901 | * tomoyo_write_profile - Write to profile table. | |
902 | * | |
903 | * @head: Pointer to "struct tomoyo_io_buffer". | |
904 | * | |
905 | * Returns 0 on success, negative value otherwise. | |
906 | */ | |
907 | static int tomoyo_write_profile(struct tomoyo_io_buffer *head) | |
908 | { | |
909 | char *data = head->write_buf; | |
910 | unsigned int i; | |
911 | unsigned int value; | |
912 | char *cp; | |
913 | struct tomoyo_profile *profile; | |
914 | unsigned long num; | |
915 | ||
916 | cp = strchr(data, '-'); | |
917 | if (cp) | |
918 | *cp = '\0'; | |
919 | if (strict_strtoul(data, 10, &num)) | |
920 | return -EINVAL; | |
921 | if (cp) | |
922 | data = cp + 1; | |
923 | profile = tomoyo_find_or_assign_new_profile(num); | |
924 | if (!profile) | |
925 | return -EINVAL; | |
926 | cp = strchr(data, '='); | |
927 | if (!cp) | |
928 | return -EINVAL; | |
929 | *cp = '\0'; | |
930 | if (!strcmp(data, "COMMENT")) { | |
bf24fb01 TH |
931 | const struct tomoyo_path_info *old_comment = profile->comment; |
932 | profile->comment = tomoyo_get_name(cp + 1); | |
933 | tomoyo_put_name(old_comment); | |
9590837b KT |
934 | return 0; |
935 | } | |
936 | for (i = 0; i < TOMOYO_MAX_CONTROL_INDEX; i++) { | |
937 | if (strcmp(data, tomoyo_control_array[i].keyword)) | |
938 | continue; | |
939 | if (sscanf(cp + 1, "%u", &value) != 1) { | |
940 | int j; | |
941 | const char **modes; | |
942 | switch (i) { | |
943 | case TOMOYO_VERBOSE: | |
944 | modes = tomoyo_mode_2; | |
945 | break; | |
946 | default: | |
947 | modes = tomoyo_mode_4; | |
948 | break; | |
949 | } | |
950 | for (j = 0; j < 4; j++) { | |
951 | if (strcmp(cp + 1, modes[j])) | |
952 | continue; | |
953 | value = j; | |
954 | break; | |
955 | } | |
956 | if (j == 4) | |
957 | return -EINVAL; | |
958 | } else if (value > tomoyo_control_array[i].max_value) { | |
959 | value = tomoyo_control_array[i].max_value; | |
960 | } | |
961 | profile->value[i] = value; | |
962 | return 0; | |
963 | } | |
964 | return -EINVAL; | |
965 | } | |
966 | ||
967 | /** | |
968 | * tomoyo_read_profile - Read from profile table. | |
969 | * | |
970 | * @head: Pointer to "struct tomoyo_io_buffer". | |
971 | * | |
972 | * Returns 0. | |
973 | */ | |
974 | static int tomoyo_read_profile(struct tomoyo_io_buffer *head) | |
975 | { | |
976 | static const int total = TOMOYO_MAX_CONTROL_INDEX + 1; | |
977 | int step; | |
978 | ||
979 | if (head->read_eof) | |
980 | return 0; | |
981 | for (step = head->read_step; step < TOMOYO_MAX_PROFILES * total; | |
982 | step++) { | |
983 | const u8 index = step / total; | |
984 | u8 type = step % total; | |
985 | const struct tomoyo_profile *profile | |
986 | = tomoyo_profile_ptr[index]; | |
987 | head->read_step = step; | |
988 | if (!profile) | |
989 | continue; | |
990 | if (!type) { /* Print profile' comment tag. */ | |
991 | if (!tomoyo_io_printf(head, "%u-COMMENT=%s\n", | |
992 | index, profile->comment ? | |
993 | profile->comment->name : "")) | |
994 | break; | |
995 | continue; | |
996 | } | |
997 | type--; | |
998 | if (type < TOMOYO_MAX_CONTROL_INDEX) { | |
999 | const unsigned int value = profile->value[type]; | |
1000 | const char **modes = NULL; | |
1001 | const char *keyword | |
1002 | = tomoyo_control_array[type].keyword; | |
1003 | switch (tomoyo_control_array[type].max_value) { | |
1004 | case 3: | |
1005 | modes = tomoyo_mode_4; | |
1006 | break; | |
1007 | case 1: | |
1008 | modes = tomoyo_mode_2; | |
1009 | break; | |
1010 | } | |
1011 | if (modes) { | |
1012 | if (!tomoyo_io_printf(head, "%u-%s=%s\n", index, | |
1013 | keyword, modes[value])) | |
1014 | break; | |
1015 | } else { | |
1016 | if (!tomoyo_io_printf(head, "%u-%s=%u\n", index, | |
1017 | keyword, value)) | |
1018 | break; | |
1019 | } | |
1020 | } | |
1021 | } | |
1022 | if (step == TOMOYO_MAX_PROFILES * total) | |
1023 | head->read_eof = true; | |
1024 | return 0; | |
1025 | } | |
1026 | ||
c3fa109a TH |
1027 | /* |
1028 | * tomoyo_policy_manager_list is used for holding list of domainnames or | |
1029 | * programs which are permitted to modify configuration via | |
1030 | * /sys/kernel/security/tomoyo/ interface. | |
1031 | * | |
1032 | * An entry is added by | |
1033 | * | |
1034 | * # echo '<kernel> /sbin/mingetty /bin/login /bin/bash' > \ | |
1035 | * /sys/kernel/security/tomoyo/manager | |
1036 | * (if you want to specify by a domainname) | |
1037 | * | |
1038 | * or | |
1039 | * | |
1040 | * # echo '/usr/lib/ccs/editpolicy' > /sys/kernel/security/tomoyo/manager | |
1041 | * (if you want to specify by a program's location) | |
1042 | * | |
1043 | * and is deleted by | |
1044 | * | |
1045 | * # echo 'delete <kernel> /sbin/mingetty /bin/login /bin/bash' > \ | |
1046 | * /sys/kernel/security/tomoyo/manager | |
1047 | * | |
1048 | * or | |
1049 | * | |
1050 | * # echo 'delete /usr/lib/ccs/editpolicy' > \ | |
1051 | * /sys/kernel/security/tomoyo/manager | |
1052 | * | |
1053 | * and all entries are retrieved by | |
1054 | * | |
1055 | * # cat /sys/kernel/security/tomoyo/manager | |
1056 | */ | |
847b173e | 1057 | LIST_HEAD(tomoyo_policy_manager_list); |
9590837b KT |
1058 | |
1059 | /** | |
1060 | * tomoyo_update_manager_entry - Add a manager entry. | |
1061 | * | |
1062 | * @manager: The path to manager or the domainnamme. | |
1063 | * @is_delete: True if it is a delete request. | |
1064 | * | |
1065 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1066 | * |
1067 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1068 | */ |
1069 | static int tomoyo_update_manager_entry(const char *manager, | |
1070 | const bool is_delete) | |
1071 | { | |
ca0b7df3 | 1072 | struct tomoyo_policy_manager_entry *entry = NULL; |
9590837b KT |
1073 | struct tomoyo_policy_manager_entry *ptr; |
1074 | const struct tomoyo_path_info *saved_manager; | |
ca0b7df3 | 1075 | int error = is_delete ? -ENOENT : -ENOMEM; |
9590837b KT |
1076 | bool is_domain = false; |
1077 | ||
1078 | if (tomoyo_is_domain_def(manager)) { | |
17080008 | 1079 | if (!tomoyo_is_correct_domain(manager)) |
9590837b KT |
1080 | return -EINVAL; |
1081 | is_domain = true; | |
1082 | } else { | |
17080008 | 1083 | if (!tomoyo_is_correct_path(manager, 1, -1, -1)) |
9590837b KT |
1084 | return -EINVAL; |
1085 | } | |
bf24fb01 | 1086 | saved_manager = tomoyo_get_name(manager); |
9590837b KT |
1087 | if (!saved_manager) |
1088 | return -ENOMEM; | |
ca0b7df3 TH |
1089 | if (!is_delete) |
1090 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
f737d95d | 1091 | mutex_lock(&tomoyo_policy_lock); |
fdb8ebb7 | 1092 | list_for_each_entry_rcu(ptr, &tomoyo_policy_manager_list, list) { |
9590837b KT |
1093 | if (ptr->manager != saved_manager) |
1094 | continue; | |
1095 | ptr->is_deleted = is_delete; | |
1096 | error = 0; | |
ca0b7df3 | 1097 | break; |
9590837b | 1098 | } |
ca0b7df3 TH |
1099 | if (!is_delete && error && tomoyo_memory_ok(entry)) { |
1100 | entry->manager = saved_manager; | |
bf24fb01 | 1101 | saved_manager = NULL; |
ca0b7df3 TH |
1102 | entry->is_domain = is_domain; |
1103 | list_add_tail_rcu(&entry->list, &tomoyo_policy_manager_list); | |
1104 | entry = NULL; | |
1105 | error = 0; | |
9590837b | 1106 | } |
f737d95d | 1107 | mutex_unlock(&tomoyo_policy_lock); |
bf24fb01 | 1108 | tomoyo_put_name(saved_manager); |
ca0b7df3 | 1109 | kfree(entry); |
9590837b KT |
1110 | return error; |
1111 | } | |
1112 | ||
1113 | /** | |
1114 | * tomoyo_write_manager_policy - Write manager policy. | |
1115 | * | |
1116 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1117 | * | |
1118 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1119 | * |
1120 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1121 | */ |
1122 | static int tomoyo_write_manager_policy(struct tomoyo_io_buffer *head) | |
1123 | { | |
1124 | char *data = head->write_buf; | |
1125 | bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE); | |
1126 | ||
1127 | if (!strcmp(data, "manage_by_non_root")) { | |
1128 | tomoyo_manage_by_non_root = !is_delete; | |
1129 | return 0; | |
1130 | } | |
1131 | return tomoyo_update_manager_entry(data, is_delete); | |
1132 | } | |
1133 | ||
1134 | /** | |
1135 | * tomoyo_read_manager_policy - Read manager policy. | |
1136 | * | |
1137 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1138 | * | |
1139 | * Returns 0. | |
fdb8ebb7 TH |
1140 | * |
1141 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1142 | */ |
1143 | static int tomoyo_read_manager_policy(struct tomoyo_io_buffer *head) | |
1144 | { | |
1145 | struct list_head *pos; | |
1146 | bool done = true; | |
1147 | ||
1148 | if (head->read_eof) | |
1149 | return 0; | |
9590837b KT |
1150 | list_for_each_cookie(pos, head->read_var2, |
1151 | &tomoyo_policy_manager_list) { | |
1152 | struct tomoyo_policy_manager_entry *ptr; | |
1153 | ptr = list_entry(pos, struct tomoyo_policy_manager_entry, | |
1154 | list); | |
1155 | if (ptr->is_deleted) | |
1156 | continue; | |
7d2948b1 TH |
1157 | done = tomoyo_io_printf(head, "%s\n", ptr->manager->name); |
1158 | if (!done) | |
9590837b | 1159 | break; |
9590837b | 1160 | } |
9590837b KT |
1161 | head->read_eof = done; |
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | /** | |
1166 | * tomoyo_is_policy_manager - Check whether the current process is a policy manager. | |
1167 | * | |
1168 | * Returns true if the current process is permitted to modify policy | |
1169 | * via /sys/kernel/security/tomoyo/ interface. | |
fdb8ebb7 TH |
1170 | * |
1171 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1172 | */ |
1173 | static bool tomoyo_is_policy_manager(void) | |
1174 | { | |
1175 | struct tomoyo_policy_manager_entry *ptr; | |
1176 | const char *exe; | |
1177 | const struct task_struct *task = current; | |
1178 | const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname; | |
1179 | bool found = false; | |
1180 | ||
1181 | if (!tomoyo_policy_loaded) | |
1182 | return true; | |
1183 | if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid)) | |
1184 | return false; | |
fdb8ebb7 | 1185 | list_for_each_entry_rcu(ptr, &tomoyo_policy_manager_list, list) { |
9590837b KT |
1186 | if (!ptr->is_deleted && ptr->is_domain |
1187 | && !tomoyo_pathcmp(domainname, ptr->manager)) { | |
1188 | found = true; | |
1189 | break; | |
1190 | } | |
1191 | } | |
9590837b KT |
1192 | if (found) |
1193 | return true; | |
1194 | exe = tomoyo_get_exe(); | |
1195 | if (!exe) | |
1196 | return false; | |
fdb8ebb7 | 1197 | list_for_each_entry_rcu(ptr, &tomoyo_policy_manager_list, list) { |
9590837b KT |
1198 | if (!ptr->is_deleted && !ptr->is_domain |
1199 | && !strcmp(exe, ptr->manager->name)) { | |
1200 | found = true; | |
1201 | break; | |
1202 | } | |
1203 | } | |
9590837b KT |
1204 | if (!found) { /* Reduce error messages. */ |
1205 | static pid_t last_pid; | |
1206 | const pid_t pid = current->pid; | |
1207 | if (last_pid != pid) { | |
1208 | printk(KERN_WARNING "%s ( %s ) is not permitted to " | |
1209 | "update policies.\n", domainname->name, exe); | |
1210 | last_pid = pid; | |
1211 | } | |
1212 | } | |
8e2d39a1 | 1213 | kfree(exe); |
9590837b KT |
1214 | return found; |
1215 | } | |
1216 | ||
1217 | /** | |
1218 | * tomoyo_is_select_one - Parse select command. | |
1219 | * | |
1220 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1221 | * @data: String to parse. | |
1222 | * | |
1223 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
1224 | * |
1225 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1226 | */ |
1227 | static bool tomoyo_is_select_one(struct tomoyo_io_buffer *head, | |
1228 | const char *data) | |
1229 | { | |
1230 | unsigned int pid; | |
1231 | struct tomoyo_domain_info *domain = NULL; | |
1232 | ||
1233 | if (sscanf(data, "pid=%u", &pid) == 1) { | |
1234 | struct task_struct *p; | |
1fcdc7c5 | 1235 | rcu_read_lock(); |
9590837b KT |
1236 | read_lock(&tasklist_lock); |
1237 | p = find_task_by_vpid(pid); | |
1238 | if (p) | |
1239 | domain = tomoyo_real_domain(p); | |
1240 | read_unlock(&tasklist_lock); | |
1fcdc7c5 | 1241 | rcu_read_unlock(); |
9590837b | 1242 | } else if (!strncmp(data, "domain=", 7)) { |
fdb8ebb7 | 1243 | if (tomoyo_is_domain_def(data + 7)) |
9590837b | 1244 | domain = tomoyo_find_domain(data + 7); |
9590837b KT |
1245 | } else |
1246 | return false; | |
1247 | head->write_var1 = domain; | |
1248 | /* Accessing read_buf is safe because head->io_sem is held. */ | |
1249 | if (!head->read_buf) | |
1250 | return true; /* Do nothing if open(O_WRONLY). */ | |
1251 | head->read_avail = 0; | |
1252 | tomoyo_io_printf(head, "# select %s\n", data); | |
1253 | head->read_single_domain = true; | |
1254 | head->read_eof = !domain; | |
1255 | if (domain) { | |
1256 | struct tomoyo_domain_info *d; | |
1257 | head->read_var1 = NULL; | |
fdb8ebb7 | 1258 | list_for_each_entry_rcu(d, &tomoyo_domain_list, list) { |
9590837b KT |
1259 | if (d == domain) |
1260 | break; | |
1261 | head->read_var1 = &d->list; | |
1262 | } | |
9590837b KT |
1263 | head->read_var2 = NULL; |
1264 | head->read_bit = 0; | |
1265 | head->read_step = 0; | |
1266 | if (domain->is_deleted) | |
1267 | tomoyo_io_printf(head, "# This is a deleted domain.\n"); | |
1268 | } | |
1269 | return true; | |
1270 | } | |
1271 | ||
ccf135f5 TH |
1272 | /** |
1273 | * tomoyo_delete_domain - Delete a domain. | |
1274 | * | |
1275 | * @domainname: The name of domain. | |
1276 | * | |
1277 | * Returns 0. | |
fdb8ebb7 TH |
1278 | * |
1279 | * Caller holds tomoyo_read_lock(). | |
ccf135f5 TH |
1280 | */ |
1281 | static int tomoyo_delete_domain(char *domainname) | |
1282 | { | |
1283 | struct tomoyo_domain_info *domain; | |
1284 | struct tomoyo_path_info name; | |
1285 | ||
1286 | name.name = domainname; | |
1287 | tomoyo_fill_path_info(&name); | |
f737d95d | 1288 | mutex_lock(&tomoyo_policy_lock); |
ccf135f5 | 1289 | /* Is there an active domain? */ |
fdb8ebb7 | 1290 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
ccf135f5 TH |
1291 | /* Never delete tomoyo_kernel_domain */ |
1292 | if (domain == &tomoyo_kernel_domain) | |
1293 | continue; | |
1294 | if (domain->is_deleted || | |
1295 | tomoyo_pathcmp(domain->domainname, &name)) | |
1296 | continue; | |
1297 | domain->is_deleted = true; | |
1298 | break; | |
1299 | } | |
f737d95d | 1300 | mutex_unlock(&tomoyo_policy_lock); |
ccf135f5 TH |
1301 | return 0; |
1302 | } | |
1303 | ||
9590837b KT |
1304 | /** |
1305 | * tomoyo_write_domain_policy - Write domain policy. | |
1306 | * | |
1307 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1308 | * | |
1309 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1310 | * |
1311 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1312 | */ |
1313 | static int tomoyo_write_domain_policy(struct tomoyo_io_buffer *head) | |
1314 | { | |
1315 | char *data = head->write_buf; | |
1316 | struct tomoyo_domain_info *domain = head->write_var1; | |
1317 | bool is_delete = false; | |
1318 | bool is_select = false; | |
9590837b KT |
1319 | unsigned int profile; |
1320 | ||
1321 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE)) | |
1322 | is_delete = true; | |
1323 | else if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_SELECT)) | |
1324 | is_select = true; | |
9590837b KT |
1325 | if (is_select && tomoyo_is_select_one(head, data)) |
1326 | return 0; | |
1327 | /* Don't allow updating policies by non manager programs. */ | |
1328 | if (!tomoyo_is_policy_manager()) | |
1329 | return -EPERM; | |
1330 | if (tomoyo_is_domain_def(data)) { | |
1331 | domain = NULL; | |
1332 | if (is_delete) | |
1333 | tomoyo_delete_domain(data); | |
fdb8ebb7 | 1334 | else if (is_select) |
9590837b | 1335 | domain = tomoyo_find_domain(data); |
fdb8ebb7 | 1336 | else |
9590837b KT |
1337 | domain = tomoyo_find_or_assign_new_domain(data, 0); |
1338 | head->write_var1 = domain; | |
1339 | return 0; | |
1340 | } | |
1341 | if (!domain) | |
1342 | return -EINVAL; | |
1343 | ||
1344 | if (sscanf(data, TOMOYO_KEYWORD_USE_PROFILE "%u", &profile) == 1 | |
1345 | && profile < TOMOYO_MAX_PROFILES) { | |
1346 | if (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded) | |
1347 | domain->profile = (u8) profile; | |
1348 | return 0; | |
1349 | } | |
1350 | if (!strcmp(data, TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ)) { | |
ea13ddba | 1351 | domain->ignore_global_allow_read = !is_delete; |
9590837b KT |
1352 | return 0; |
1353 | } | |
1354 | return tomoyo_write_file_policy(data, domain, is_delete); | |
1355 | } | |
1356 | ||
1357 | /** | |
7ef61233 | 1358 | * tomoyo_print_path_acl - Print a single path ACL entry. |
9590837b KT |
1359 | * |
1360 | * @head: Pointer to "struct tomoyo_io_buffer". | |
7ef61233 | 1361 | * @ptr: Pointer to "struct tomoyo_path_acl". |
9590837b KT |
1362 | * |
1363 | * Returns true on success, false otherwise. | |
1364 | */ | |
7ef61233 TH |
1365 | static bool tomoyo_print_path_acl(struct tomoyo_io_buffer *head, |
1366 | struct tomoyo_path_acl *ptr) | |
9590837b KT |
1367 | { |
1368 | int pos; | |
1369 | u8 bit; | |
1370 | const char *atmark = ""; | |
1371 | const char *filename; | |
937bf613 | 1372 | const u32 perm = ptr->perm | (((u32) ptr->perm_high) << 16); |
9590837b KT |
1373 | |
1374 | filename = ptr->filename->name; | |
7ef61233 | 1375 | for (bit = head->read_bit; bit < TOMOYO_MAX_PATH_OPERATION; bit++) { |
9590837b KT |
1376 | const char *msg; |
1377 | if (!(perm & (1 << bit))) | |
1378 | continue; | |
1379 | /* Print "read/write" instead of "read" and "write". */ | |
7ef61233 TH |
1380 | if ((bit == TOMOYO_TYPE_READ || bit == TOMOYO_TYPE_WRITE) |
1381 | && (perm & (1 << TOMOYO_TYPE_READ_WRITE))) | |
9590837b | 1382 | continue; |
7ef61233 | 1383 | msg = tomoyo_path2keyword(bit); |
9590837b KT |
1384 | pos = head->read_avail; |
1385 | if (!tomoyo_io_printf(head, "allow_%s %s%s\n", msg, | |
1386 | atmark, filename)) | |
1387 | goto out; | |
1388 | } | |
1389 | head->read_bit = 0; | |
1390 | return true; | |
1391 | out: | |
1392 | head->read_bit = bit; | |
1393 | head->read_avail = pos; | |
1394 | return false; | |
1395 | } | |
1396 | ||
1397 | /** | |
7ef61233 | 1398 | * tomoyo_print_path2_acl - Print a double path ACL entry. |
9590837b KT |
1399 | * |
1400 | * @head: Pointer to "struct tomoyo_io_buffer". | |
7ef61233 | 1401 | * @ptr: Pointer to "struct tomoyo_path2_acl". |
9590837b KT |
1402 | * |
1403 | * Returns true on success, false otherwise. | |
1404 | */ | |
7ef61233 TH |
1405 | static bool tomoyo_print_path2_acl(struct tomoyo_io_buffer *head, |
1406 | struct tomoyo_path2_acl *ptr) | |
9590837b KT |
1407 | { |
1408 | int pos; | |
1409 | const char *atmark1 = ""; | |
1410 | const char *atmark2 = ""; | |
1411 | const char *filename1; | |
1412 | const char *filename2; | |
1413 | const u8 perm = ptr->perm; | |
1414 | u8 bit; | |
1415 | ||
1416 | filename1 = ptr->filename1->name; | |
1417 | filename2 = ptr->filename2->name; | |
7ef61233 | 1418 | for (bit = head->read_bit; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) { |
9590837b KT |
1419 | const char *msg; |
1420 | if (!(perm & (1 << bit))) | |
1421 | continue; | |
7ef61233 | 1422 | msg = tomoyo_path22keyword(bit); |
9590837b KT |
1423 | pos = head->read_avail; |
1424 | if (!tomoyo_io_printf(head, "allow_%s %s%s %s%s\n", msg, | |
1425 | atmark1, filename1, atmark2, filename2)) | |
1426 | goto out; | |
1427 | } | |
1428 | head->read_bit = 0; | |
1429 | return true; | |
1430 | out: | |
1431 | head->read_bit = bit; | |
1432 | head->read_avail = pos; | |
1433 | return false; | |
1434 | } | |
1435 | ||
1436 | /** | |
1437 | * tomoyo_print_entry - Print an ACL entry. | |
1438 | * | |
1439 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1440 | * @ptr: Pointer to an ACL entry. | |
1441 | * | |
1442 | * Returns true on success, false otherwise. | |
1443 | */ | |
1444 | static bool tomoyo_print_entry(struct tomoyo_io_buffer *head, | |
1445 | struct tomoyo_acl_info *ptr) | |
1446 | { | |
ea13ddba | 1447 | const u8 acl_type = ptr->type; |
9590837b | 1448 | |
7ef61233 TH |
1449 | if (acl_type == TOMOYO_TYPE_PATH_ACL) { |
1450 | struct tomoyo_path_acl *acl | |
1451 | = container_of(ptr, struct tomoyo_path_acl, head); | |
1452 | return tomoyo_print_path_acl(head, acl); | |
9590837b | 1453 | } |
7ef61233 TH |
1454 | if (acl_type == TOMOYO_TYPE_PATH2_ACL) { |
1455 | struct tomoyo_path2_acl *acl | |
1456 | = container_of(ptr, struct tomoyo_path2_acl, head); | |
1457 | return tomoyo_print_path2_acl(head, acl); | |
9590837b KT |
1458 | } |
1459 | BUG(); /* This must not happen. */ | |
1460 | return false; | |
1461 | } | |
1462 | ||
1463 | /** | |
1464 | * tomoyo_read_domain_policy - Read domain policy. | |
1465 | * | |
1466 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1467 | * | |
1468 | * Returns 0. | |
fdb8ebb7 TH |
1469 | * |
1470 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1471 | */ |
1472 | static int tomoyo_read_domain_policy(struct tomoyo_io_buffer *head) | |
1473 | { | |
1474 | struct list_head *dpos; | |
1475 | struct list_head *apos; | |
1476 | bool done = true; | |
1477 | ||
1478 | if (head->read_eof) | |
1479 | return 0; | |
1480 | if (head->read_step == 0) | |
1481 | head->read_step = 1; | |
9590837b KT |
1482 | list_for_each_cookie(dpos, head->read_var1, &tomoyo_domain_list) { |
1483 | struct tomoyo_domain_info *domain; | |
1484 | const char *quota_exceeded = ""; | |
1485 | const char *transition_failed = ""; | |
1486 | const char *ignore_global_allow_read = ""; | |
1487 | domain = list_entry(dpos, struct tomoyo_domain_info, list); | |
1488 | if (head->read_step != 1) | |
1489 | goto acl_loop; | |
1490 | if (domain->is_deleted && !head->read_single_domain) | |
1491 | continue; | |
1492 | /* Print domainname and flags. */ | |
1493 | if (domain->quota_warned) | |
1494 | quota_exceeded = "quota_exceeded\n"; | |
ea13ddba | 1495 | if (domain->transition_failed) |
9590837b | 1496 | transition_failed = "transition_failed\n"; |
ea13ddba | 1497 | if (domain->ignore_global_allow_read) |
9590837b KT |
1498 | ignore_global_allow_read |
1499 | = TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "\n"; | |
7d2948b1 TH |
1500 | done = tomoyo_io_printf(head, "%s\n" TOMOYO_KEYWORD_USE_PROFILE |
1501 | "%u\n%s%s%s\n", | |
1502 | domain->domainname->name, | |
1503 | domain->profile, quota_exceeded, | |
1504 | transition_failed, | |
1505 | ignore_global_allow_read); | |
1506 | if (!done) | |
9590837b | 1507 | break; |
9590837b KT |
1508 | head->read_step = 2; |
1509 | acl_loop: | |
1510 | if (head->read_step == 3) | |
1511 | goto tail_mark; | |
1512 | /* Print ACL entries in the domain. */ | |
9590837b | 1513 | list_for_each_cookie(apos, head->read_var2, |
7d2948b1 | 1514 | &domain->acl_info_list) { |
9590837b KT |
1515 | struct tomoyo_acl_info *ptr |
1516 | = list_entry(apos, struct tomoyo_acl_info, | |
7d2948b1 TH |
1517 | list); |
1518 | done = tomoyo_print_entry(head, ptr); | |
1519 | if (!done) | |
9590837b | 1520 | break; |
9590837b | 1521 | } |
9590837b KT |
1522 | if (!done) |
1523 | break; | |
1524 | head->read_step = 3; | |
1525 | tail_mark: | |
7d2948b1 TH |
1526 | done = tomoyo_io_printf(head, "\n"); |
1527 | if (!done) | |
9590837b | 1528 | break; |
9590837b KT |
1529 | head->read_step = 1; |
1530 | if (head->read_single_domain) | |
1531 | break; | |
1532 | } | |
9590837b KT |
1533 | head->read_eof = done; |
1534 | return 0; | |
1535 | } | |
1536 | ||
1537 | /** | |
1538 | * tomoyo_write_domain_profile - Assign profile for specified domain. | |
1539 | * | |
1540 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1541 | * | |
1542 | * Returns 0 on success, -EINVAL otherwise. | |
1543 | * | |
1544 | * This is equivalent to doing | |
1545 | * | |
1546 | * ( echo "select " $domainname; echo "use_profile " $profile ) | | |
1547 | * /usr/lib/ccs/loadpolicy -d | |
fdb8ebb7 TH |
1548 | * |
1549 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1550 | */ |
1551 | static int tomoyo_write_domain_profile(struct tomoyo_io_buffer *head) | |
1552 | { | |
1553 | char *data = head->write_buf; | |
1554 | char *cp = strchr(data, ' '); | |
1555 | struct tomoyo_domain_info *domain; | |
1556 | unsigned long profile; | |
1557 | ||
1558 | if (!cp) | |
1559 | return -EINVAL; | |
1560 | *cp = '\0'; | |
9590837b | 1561 | domain = tomoyo_find_domain(cp + 1); |
9590837b KT |
1562 | if (strict_strtoul(data, 10, &profile)) |
1563 | return -EINVAL; | |
1564 | if (domain && profile < TOMOYO_MAX_PROFILES | |
1565 | && (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded)) | |
1566 | domain->profile = (u8) profile; | |
1567 | return 0; | |
1568 | } | |
1569 | ||
1570 | /** | |
1571 | * tomoyo_read_domain_profile - Read only domainname and profile. | |
1572 | * | |
1573 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1574 | * | |
1575 | * Returns list of profile number and domainname pairs. | |
1576 | * | |
1577 | * This is equivalent to doing | |
1578 | * | |
1579 | * grep -A 1 '^<kernel>' /sys/kernel/security/tomoyo/domain_policy | | |
1580 | * awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" ) | |
1581 | * domainname = $0; } else if ( $1 == "use_profile" ) { | |
1582 | * print $2 " " domainname; domainname = ""; } } ; ' | |
fdb8ebb7 TH |
1583 | * |
1584 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1585 | */ |
1586 | static int tomoyo_read_domain_profile(struct tomoyo_io_buffer *head) | |
1587 | { | |
1588 | struct list_head *pos; | |
1589 | bool done = true; | |
1590 | ||
1591 | if (head->read_eof) | |
1592 | return 0; | |
9590837b KT |
1593 | list_for_each_cookie(pos, head->read_var1, &tomoyo_domain_list) { |
1594 | struct tomoyo_domain_info *domain; | |
1595 | domain = list_entry(pos, struct tomoyo_domain_info, list); | |
1596 | if (domain->is_deleted) | |
1597 | continue; | |
7d2948b1 TH |
1598 | done = tomoyo_io_printf(head, "%u %s\n", domain->profile, |
1599 | domain->domainname->name); | |
1600 | if (!done) | |
9590837b | 1601 | break; |
9590837b | 1602 | } |
9590837b KT |
1603 | head->read_eof = done; |
1604 | return 0; | |
1605 | } | |
1606 | ||
1607 | /** | |
1608 | * tomoyo_write_pid: Specify PID to obtain domainname. | |
1609 | * | |
1610 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1611 | * | |
1612 | * Returns 0. | |
1613 | */ | |
1614 | static int tomoyo_write_pid(struct tomoyo_io_buffer *head) | |
1615 | { | |
1616 | unsigned long pid; | |
1617 | /* No error check. */ | |
1618 | strict_strtoul(head->write_buf, 10, &pid); | |
1619 | head->read_step = (int) pid; | |
1620 | head->read_eof = false; | |
1621 | return 0; | |
1622 | } | |
1623 | ||
1624 | /** | |
1625 | * tomoyo_read_pid - Get domainname of the specified PID. | |
1626 | * | |
1627 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1628 | * | |
1629 | * Returns the domainname which the specified PID is in on success, | |
1630 | * empty string otherwise. | |
1631 | * The PID is specified by tomoyo_write_pid() so that the user can obtain | |
1632 | * using read()/write() interface rather than sysctl() interface. | |
1633 | */ | |
1634 | static int tomoyo_read_pid(struct tomoyo_io_buffer *head) | |
1635 | { | |
1636 | if (head->read_avail == 0 && !head->read_eof) { | |
1637 | const int pid = head->read_step; | |
1638 | struct task_struct *p; | |
1639 | struct tomoyo_domain_info *domain = NULL; | |
1fcdc7c5 | 1640 | rcu_read_lock(); |
9590837b KT |
1641 | read_lock(&tasklist_lock); |
1642 | p = find_task_by_vpid(pid); | |
1643 | if (p) | |
1644 | domain = tomoyo_real_domain(p); | |
1645 | read_unlock(&tasklist_lock); | |
1fcdc7c5 | 1646 | rcu_read_unlock(); |
9590837b KT |
1647 | if (domain) |
1648 | tomoyo_io_printf(head, "%d %u %s", pid, domain->profile, | |
1649 | domain->domainname->name); | |
1650 | head->read_eof = true; | |
1651 | } | |
1652 | return 0; | |
1653 | } | |
1654 | ||
1655 | /** | |
1656 | * tomoyo_write_exception_policy - Write exception policy. | |
1657 | * | |
1658 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1659 | * | |
1660 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1661 | * |
1662 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1663 | */ |
1664 | static int tomoyo_write_exception_policy(struct tomoyo_io_buffer *head) | |
1665 | { | |
1666 | char *data = head->write_buf; | |
1667 | bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE); | |
1668 | ||
1669 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_KEEP_DOMAIN)) | |
1670 | return tomoyo_write_domain_keeper_policy(data, false, | |
1671 | is_delete); | |
1672 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NO_KEEP_DOMAIN)) | |
1673 | return tomoyo_write_domain_keeper_policy(data, true, is_delete); | |
1674 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_INITIALIZE_DOMAIN)) | |
1675 | return tomoyo_write_domain_initializer_policy(data, false, | |
1676 | is_delete); | |
1677 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN)) | |
1678 | return tomoyo_write_domain_initializer_policy(data, true, | |
1679 | is_delete); | |
1680 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALIAS)) | |
1681 | return tomoyo_write_alias_policy(data, is_delete); | |
1682 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALLOW_READ)) | |
1683 | return tomoyo_write_globally_readable_policy(data, is_delete); | |
1684 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_FILE_PATTERN)) | |
1685 | return tomoyo_write_pattern_policy(data, is_delete); | |
1686 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DENY_REWRITE)) | |
1687 | return tomoyo_write_no_rewrite_policy(data, is_delete); | |
1688 | return -EINVAL; | |
1689 | } | |
1690 | ||
1691 | /** | |
1692 | * tomoyo_read_exception_policy - Read exception policy. | |
1693 | * | |
1694 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1695 | * | |
1696 | * Returns 0 on success, -EINVAL otherwise. | |
fdb8ebb7 TH |
1697 | * |
1698 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1699 | */ |
1700 | static int tomoyo_read_exception_policy(struct tomoyo_io_buffer *head) | |
1701 | { | |
1702 | if (!head->read_eof) { | |
1703 | switch (head->read_step) { | |
1704 | case 0: | |
1705 | head->read_var2 = NULL; | |
1706 | head->read_step = 1; | |
1707 | case 1: | |
1708 | if (!tomoyo_read_domain_keeper_policy(head)) | |
1709 | break; | |
1710 | head->read_var2 = NULL; | |
1711 | head->read_step = 2; | |
1712 | case 2: | |
1713 | if (!tomoyo_read_globally_readable_policy(head)) | |
1714 | break; | |
1715 | head->read_var2 = NULL; | |
1716 | head->read_step = 3; | |
1717 | case 3: | |
1718 | head->read_var2 = NULL; | |
1719 | head->read_step = 4; | |
1720 | case 4: | |
1721 | if (!tomoyo_read_domain_initializer_policy(head)) | |
1722 | break; | |
1723 | head->read_var2 = NULL; | |
1724 | head->read_step = 5; | |
1725 | case 5: | |
1726 | if (!tomoyo_read_alias_policy(head)) | |
1727 | break; | |
1728 | head->read_var2 = NULL; | |
1729 | head->read_step = 6; | |
1730 | case 6: | |
1731 | head->read_var2 = NULL; | |
1732 | head->read_step = 7; | |
1733 | case 7: | |
1734 | if (!tomoyo_read_file_pattern(head)) | |
1735 | break; | |
1736 | head->read_var2 = NULL; | |
1737 | head->read_step = 8; | |
1738 | case 8: | |
1739 | if (!tomoyo_read_no_rewrite_policy(head)) | |
1740 | break; | |
1741 | head->read_var2 = NULL; | |
1742 | head->read_step = 9; | |
1743 | case 9: | |
1744 | head->read_eof = true; | |
1745 | break; | |
1746 | default: | |
1747 | return -EINVAL; | |
1748 | } | |
1749 | } | |
1750 | return 0; | |
1751 | } | |
1752 | ||
1753 | /* path to policy loader */ | |
1754 | static const char *tomoyo_loader = "/sbin/tomoyo-init"; | |
1755 | ||
1756 | /** | |
1757 | * tomoyo_policy_loader_exists - Check whether /sbin/tomoyo-init exists. | |
1758 | * | |
1759 | * Returns true if /sbin/tomoyo-init exists, false otherwise. | |
1760 | */ | |
1761 | static bool tomoyo_policy_loader_exists(void) | |
1762 | { | |
1763 | /* | |
1764 | * Don't activate MAC if the policy loader doesn't exist. | |
1765 | * If the initrd includes /sbin/init but real-root-dev has not | |
1766 | * mounted on / yet, activating MAC will block the system since | |
1767 | * policies are not loaded yet. | |
1768 | * Thus, let do_execve() call this function everytime. | |
1769 | */ | |
e24977d4 | 1770 | struct path path; |
9590837b | 1771 | |
e24977d4 | 1772 | if (kern_path(tomoyo_loader, LOOKUP_FOLLOW, &path)) { |
9590837b KT |
1773 | printk(KERN_INFO "Not activating Mandatory Access Control now " |
1774 | "since %s doesn't exist.\n", tomoyo_loader); | |
1775 | return false; | |
1776 | } | |
e24977d4 | 1777 | path_put(&path); |
9590837b KT |
1778 | return true; |
1779 | } | |
1780 | ||
1781 | /** | |
1782 | * tomoyo_load_policy - Run external policy loader to load policy. | |
1783 | * | |
1784 | * @filename: The program about to start. | |
1785 | * | |
1786 | * This function checks whether @filename is /sbin/init , and if so | |
1787 | * invoke /sbin/tomoyo-init and wait for the termination of /sbin/tomoyo-init | |
1788 | * and then continues invocation of /sbin/init. | |
1789 | * /sbin/tomoyo-init reads policy files in /etc/tomoyo/ directory and | |
1790 | * writes to /sys/kernel/security/tomoyo/ interfaces. | |
1791 | * | |
1792 | * Returns nothing. | |
1793 | */ | |
1794 | void tomoyo_load_policy(const char *filename) | |
1795 | { | |
1796 | char *argv[2]; | |
1797 | char *envp[3]; | |
1798 | ||
1799 | if (tomoyo_policy_loaded) | |
1800 | return; | |
1801 | /* | |
1802 | * Check filename is /sbin/init or /sbin/tomoyo-start. | |
1803 | * /sbin/tomoyo-start is a dummy filename in case where /sbin/init can't | |
1804 | * be passed. | |
1805 | * You can create /sbin/tomoyo-start by | |
1806 | * "ln -s /bin/true /sbin/tomoyo-start". | |
1807 | */ | |
1808 | if (strcmp(filename, "/sbin/init") && | |
1809 | strcmp(filename, "/sbin/tomoyo-start")) | |
1810 | return; | |
1811 | if (!tomoyo_policy_loader_exists()) | |
1812 | return; | |
1813 | ||
1814 | printk(KERN_INFO "Calling %s to load policy. Please wait.\n", | |
1815 | tomoyo_loader); | |
1816 | argv[0] = (char *) tomoyo_loader; | |
1817 | argv[1] = NULL; | |
1818 | envp[0] = "HOME=/"; | |
1819 | envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
1820 | envp[2] = NULL; | |
1821 | call_usermodehelper(argv[0], argv, envp, 1); | |
1822 | ||
39826a1e | 1823 | printk(KERN_INFO "TOMOYO: 2.2.0 2009/04/01\n"); |
9590837b KT |
1824 | printk(KERN_INFO "Mandatory Access Control activated.\n"); |
1825 | tomoyo_policy_loaded = true; | |
1826 | { /* Check all profiles currently assigned to domains are defined. */ | |
1827 | struct tomoyo_domain_info *domain; | |
fdb8ebb7 | 1828 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
9590837b KT |
1829 | const u8 profile = domain->profile; |
1830 | if (tomoyo_profile_ptr[profile]) | |
1831 | continue; | |
1832 | panic("Profile %u (used by '%s') not defined.\n", | |
1833 | profile, domain->domainname->name); | |
1834 | } | |
9590837b KT |
1835 | } |
1836 | } | |
1837 | ||
1838 | /** | |
1839 | * tomoyo_read_version: Get version. | |
1840 | * | |
1841 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1842 | * | |
1843 | * Returns version information. | |
1844 | */ | |
1845 | static int tomoyo_read_version(struct tomoyo_io_buffer *head) | |
1846 | { | |
1847 | if (!head->read_eof) { | |
39826a1e | 1848 | tomoyo_io_printf(head, "2.2.0"); |
9590837b KT |
1849 | head->read_eof = true; |
1850 | } | |
1851 | return 0; | |
1852 | } | |
1853 | ||
1854 | /** | |
1855 | * tomoyo_read_self_domain - Get the current process's domainname. | |
1856 | * | |
1857 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1858 | * | |
1859 | * Returns the current process's domainname. | |
1860 | */ | |
1861 | static int tomoyo_read_self_domain(struct tomoyo_io_buffer *head) | |
1862 | { | |
1863 | if (!head->read_eof) { | |
1864 | /* | |
1865 | * tomoyo_domain()->domainname != NULL | |
1866 | * because every process belongs to a domain and | |
1867 | * the domain's name cannot be NULL. | |
1868 | */ | |
1869 | tomoyo_io_printf(head, "%s", tomoyo_domain()->domainname->name); | |
1870 | head->read_eof = true; | |
1871 | } | |
1872 | return 0; | |
1873 | } | |
1874 | ||
1875 | /** | |
1876 | * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface. | |
1877 | * | |
1878 | * @type: Type of interface. | |
1879 | * @file: Pointer to "struct file". | |
1880 | * | |
1881 | * Associates policy handler and returns 0 on success, -ENOMEM otherwise. | |
fdb8ebb7 TH |
1882 | * |
1883 | * Caller acquires tomoyo_read_lock(). | |
9590837b KT |
1884 | */ |
1885 | static int tomoyo_open_control(const u8 type, struct file *file) | |
1886 | { | |
8e2d39a1 | 1887 | struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_KERNEL); |
9590837b KT |
1888 | |
1889 | if (!head) | |
1890 | return -ENOMEM; | |
1891 | mutex_init(&head->io_sem); | |
1892 | switch (type) { | |
1893 | case TOMOYO_DOMAINPOLICY: | |
1894 | /* /sys/kernel/security/tomoyo/domain_policy */ | |
1895 | head->write = tomoyo_write_domain_policy; | |
1896 | head->read = tomoyo_read_domain_policy; | |
1897 | break; | |
1898 | case TOMOYO_EXCEPTIONPOLICY: | |
1899 | /* /sys/kernel/security/tomoyo/exception_policy */ | |
1900 | head->write = tomoyo_write_exception_policy; | |
1901 | head->read = tomoyo_read_exception_policy; | |
1902 | break; | |
1903 | case TOMOYO_SELFDOMAIN: | |
1904 | /* /sys/kernel/security/tomoyo/self_domain */ | |
1905 | head->read = tomoyo_read_self_domain; | |
1906 | break; | |
1907 | case TOMOYO_DOMAIN_STATUS: | |
1908 | /* /sys/kernel/security/tomoyo/.domain_status */ | |
1909 | head->write = tomoyo_write_domain_profile; | |
1910 | head->read = tomoyo_read_domain_profile; | |
1911 | break; | |
1912 | case TOMOYO_PROCESS_STATUS: | |
1913 | /* /sys/kernel/security/tomoyo/.process_status */ | |
1914 | head->write = tomoyo_write_pid; | |
1915 | head->read = tomoyo_read_pid; | |
1916 | break; | |
1917 | case TOMOYO_VERSION: | |
1918 | /* /sys/kernel/security/tomoyo/version */ | |
1919 | head->read = tomoyo_read_version; | |
1920 | head->readbuf_size = 128; | |
1921 | break; | |
1922 | case TOMOYO_MEMINFO: | |
1923 | /* /sys/kernel/security/tomoyo/meminfo */ | |
1924 | head->write = tomoyo_write_memory_quota; | |
1925 | head->read = tomoyo_read_memory_counter; | |
1926 | head->readbuf_size = 512; | |
1927 | break; | |
1928 | case TOMOYO_PROFILE: | |
1929 | /* /sys/kernel/security/tomoyo/profile */ | |
1930 | head->write = tomoyo_write_profile; | |
1931 | head->read = tomoyo_read_profile; | |
1932 | break; | |
1933 | case TOMOYO_MANAGER: | |
1934 | /* /sys/kernel/security/tomoyo/manager */ | |
1935 | head->write = tomoyo_write_manager_policy; | |
1936 | head->read = tomoyo_read_manager_policy; | |
1937 | break; | |
1938 | } | |
1939 | if (!(file->f_mode & FMODE_READ)) { | |
1940 | /* | |
1941 | * No need to allocate read_buf since it is not opened | |
1942 | * for reading. | |
1943 | */ | |
1944 | head->read = NULL; | |
1945 | } else { | |
1946 | if (!head->readbuf_size) | |
1947 | head->readbuf_size = 4096 * 2; | |
8e2d39a1 | 1948 | head->read_buf = kzalloc(head->readbuf_size, GFP_KERNEL); |
9590837b | 1949 | if (!head->read_buf) { |
8e2d39a1 | 1950 | kfree(head); |
9590837b KT |
1951 | return -ENOMEM; |
1952 | } | |
1953 | } | |
1954 | if (!(file->f_mode & FMODE_WRITE)) { | |
1955 | /* | |
1956 | * No need to allocate write_buf since it is not opened | |
1957 | * for writing. | |
1958 | */ | |
1959 | head->write = NULL; | |
1960 | } else if (head->write) { | |
1961 | head->writebuf_size = 4096 * 2; | |
8e2d39a1 | 1962 | head->write_buf = kzalloc(head->writebuf_size, GFP_KERNEL); |
9590837b | 1963 | if (!head->write_buf) { |
8e2d39a1 TH |
1964 | kfree(head->read_buf); |
1965 | kfree(head); | |
9590837b KT |
1966 | return -ENOMEM; |
1967 | } | |
1968 | } | |
fdb8ebb7 | 1969 | head->reader_idx = tomoyo_read_lock(); |
9590837b KT |
1970 | file->private_data = head; |
1971 | /* | |
1972 | * Call the handler now if the file is | |
1973 | * /sys/kernel/security/tomoyo/self_domain | |
1974 | * so that the user can use | |
1975 | * cat < /sys/kernel/security/tomoyo/self_domain" | |
1976 | * to know the current process's domainname. | |
1977 | */ | |
1978 | if (type == TOMOYO_SELFDOMAIN) | |
1979 | tomoyo_read_control(file, NULL, 0); | |
1980 | return 0; | |
1981 | } | |
1982 | ||
1983 | /** | |
1984 | * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface. | |
1985 | * | |
1986 | * @file: Pointer to "struct file". | |
1987 | * @buffer: Poiner to buffer to write to. | |
1988 | * @buffer_len: Size of @buffer. | |
1989 | * | |
1990 | * Returns bytes read on success, negative value otherwise. | |
fdb8ebb7 TH |
1991 | * |
1992 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1993 | */ |
1994 | static int tomoyo_read_control(struct file *file, char __user *buffer, | |
1995 | const int buffer_len) | |
1996 | { | |
1997 | int len = 0; | |
1998 | struct tomoyo_io_buffer *head = file->private_data; | |
1999 | char *cp; | |
2000 | ||
2001 | if (!head->read) | |
2002 | return -ENOSYS; | |
2003 | if (mutex_lock_interruptible(&head->io_sem)) | |
2004 | return -EINTR; | |
2005 | /* Call the policy handler. */ | |
2006 | len = head->read(head); | |
2007 | if (len < 0) | |
2008 | goto out; | |
2009 | /* Write to buffer. */ | |
2010 | len = head->read_avail; | |
2011 | if (len > buffer_len) | |
2012 | len = buffer_len; | |
2013 | if (!len) | |
2014 | goto out; | |
2015 | /* head->read_buf changes by some functions. */ | |
2016 | cp = head->read_buf; | |
2017 | if (copy_to_user(buffer, cp, len)) { | |
2018 | len = -EFAULT; | |
2019 | goto out; | |
2020 | } | |
2021 | head->read_avail -= len; | |
2022 | memmove(cp, cp + len, head->read_avail); | |
2023 | out: | |
2024 | mutex_unlock(&head->io_sem); | |
2025 | return len; | |
2026 | } | |
2027 | ||
2028 | /** | |
2029 | * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface. | |
2030 | * | |
2031 | * @file: Pointer to "struct file". | |
2032 | * @buffer: Pointer to buffer to read from. | |
2033 | * @buffer_len: Size of @buffer. | |
2034 | * | |
2035 | * Returns @buffer_len on success, negative value otherwise. | |
fdb8ebb7 TH |
2036 | * |
2037 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
2038 | */ |
2039 | static int tomoyo_write_control(struct file *file, const char __user *buffer, | |
2040 | const int buffer_len) | |
2041 | { | |
2042 | struct tomoyo_io_buffer *head = file->private_data; | |
2043 | int error = buffer_len; | |
2044 | int avail_len = buffer_len; | |
2045 | char *cp0 = head->write_buf; | |
2046 | ||
2047 | if (!head->write) | |
2048 | return -ENOSYS; | |
2049 | if (!access_ok(VERIFY_READ, buffer, buffer_len)) | |
2050 | return -EFAULT; | |
2051 | /* Don't allow updating policies by non manager programs. */ | |
2052 | if (head->write != tomoyo_write_pid && | |
2053 | head->write != tomoyo_write_domain_policy && | |
2054 | !tomoyo_is_policy_manager()) | |
2055 | return -EPERM; | |
2056 | if (mutex_lock_interruptible(&head->io_sem)) | |
2057 | return -EINTR; | |
2058 | /* Read a line and dispatch it to the policy handler. */ | |
2059 | while (avail_len > 0) { | |
2060 | char c; | |
2061 | if (head->write_avail >= head->writebuf_size - 1) { | |
2062 | error = -ENOMEM; | |
2063 | break; | |
2064 | } else if (get_user(c, buffer)) { | |
2065 | error = -EFAULT; | |
2066 | break; | |
2067 | } | |
2068 | buffer++; | |
2069 | avail_len--; | |
2070 | cp0[head->write_avail++] = c; | |
2071 | if (c != '\n') | |
2072 | continue; | |
2073 | cp0[head->write_avail - 1] = '\0'; | |
2074 | head->write_avail = 0; | |
2075 | tomoyo_normalize_line(cp0); | |
2076 | head->write(head); | |
2077 | } | |
2078 | mutex_unlock(&head->io_sem); | |
2079 | return error; | |
2080 | } | |
2081 | ||
2082 | /** | |
2083 | * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface. | |
2084 | * | |
2085 | * @file: Pointer to "struct file". | |
2086 | * | |
2087 | * Releases memory and returns 0. | |
fdb8ebb7 TH |
2088 | * |
2089 | * Caller looses tomoyo_read_lock(). | |
9590837b KT |
2090 | */ |
2091 | static int tomoyo_close_control(struct file *file) | |
2092 | { | |
2093 | struct tomoyo_io_buffer *head = file->private_data; | |
847b173e | 2094 | const bool is_write = !!head->write_buf; |
9590837b | 2095 | |
fdb8ebb7 | 2096 | tomoyo_read_unlock(head->reader_idx); |
9590837b | 2097 | /* Release memory used for policy I/O. */ |
8e2d39a1 | 2098 | kfree(head->read_buf); |
9590837b | 2099 | head->read_buf = NULL; |
8e2d39a1 | 2100 | kfree(head->write_buf); |
9590837b | 2101 | head->write_buf = NULL; |
8e2d39a1 | 2102 | kfree(head); |
9590837b KT |
2103 | head = NULL; |
2104 | file->private_data = NULL; | |
847b173e TH |
2105 | if (is_write) |
2106 | tomoyo_run_gc(); | |
9590837b KT |
2107 | return 0; |
2108 | } | |
2109 | ||
9590837b KT |
2110 | /** |
2111 | * tomoyo_open - open() for /sys/kernel/security/tomoyo/ interface. | |
2112 | * | |
2113 | * @inode: Pointer to "struct inode". | |
2114 | * @file: Pointer to "struct file". | |
2115 | * | |
2116 | * Returns 0 on success, negative value otherwise. | |
2117 | */ | |
2118 | static int tomoyo_open(struct inode *inode, struct file *file) | |
2119 | { | |
2120 | const int key = ((u8 *) file->f_path.dentry->d_inode->i_private) | |
2121 | - ((u8 *) NULL); | |
2122 | return tomoyo_open_control(key, file); | |
2123 | } | |
2124 | ||
2125 | /** | |
2126 | * tomoyo_release - close() for /sys/kernel/security/tomoyo/ interface. | |
2127 | * | |
2128 | * @inode: Pointer to "struct inode". | |
2129 | * @file: Pointer to "struct file". | |
2130 | * | |
2131 | * Returns 0 on success, negative value otherwise. | |
2132 | */ | |
2133 | static int tomoyo_release(struct inode *inode, struct file *file) | |
2134 | { | |
2135 | return tomoyo_close_control(file); | |
2136 | } | |
2137 | ||
2138 | /** | |
2139 | * tomoyo_read - read() for /sys/kernel/security/tomoyo/ interface. | |
2140 | * | |
2141 | * @file: Pointer to "struct file". | |
2142 | * @buf: Pointer to buffer. | |
2143 | * @count: Size of @buf. | |
2144 | * @ppos: Unused. | |
2145 | * | |
2146 | * Returns bytes read on success, negative value otherwise. | |
2147 | */ | |
2148 | static ssize_t tomoyo_read(struct file *file, char __user *buf, size_t count, | |
2149 | loff_t *ppos) | |
2150 | { | |
2151 | return tomoyo_read_control(file, buf, count); | |
2152 | } | |
2153 | ||
2154 | /** | |
2155 | * tomoyo_write - write() for /sys/kernel/security/tomoyo/ interface. | |
2156 | * | |
2157 | * @file: Pointer to "struct file". | |
2158 | * @buf: Pointer to buffer. | |
2159 | * @count: Size of @buf. | |
2160 | * @ppos: Unused. | |
2161 | * | |
2162 | * Returns @count on success, negative value otherwise. | |
2163 | */ | |
2164 | static ssize_t tomoyo_write(struct file *file, const char __user *buf, | |
2165 | size_t count, loff_t *ppos) | |
2166 | { | |
2167 | return tomoyo_write_control(file, buf, count); | |
2168 | } | |
2169 | ||
c3fa109a TH |
2170 | /* |
2171 | * tomoyo_operations is a "struct file_operations" which is used for handling | |
2172 | * /sys/kernel/security/tomoyo/ interface. | |
2173 | * | |
2174 | * Some files under /sys/kernel/security/tomoyo/ directory accept open(O_RDWR). | |
2175 | * See tomoyo_io_buffer for internals. | |
2176 | */ | |
9590837b KT |
2177 | static const struct file_operations tomoyo_operations = { |
2178 | .open = tomoyo_open, | |
2179 | .release = tomoyo_release, | |
2180 | .read = tomoyo_read, | |
2181 | .write = tomoyo_write, | |
2182 | }; | |
2183 | ||
2184 | /** | |
2185 | * tomoyo_create_entry - Create interface files under /sys/kernel/security/tomoyo/ directory. | |
2186 | * | |
2187 | * @name: The name of the interface file. | |
2188 | * @mode: The permission of the interface file. | |
2189 | * @parent: The parent directory. | |
2190 | * @key: Type of interface. | |
2191 | * | |
2192 | * Returns nothing. | |
2193 | */ | |
2194 | static void __init tomoyo_create_entry(const char *name, const mode_t mode, | |
2195 | struct dentry *parent, const u8 key) | |
2196 | { | |
2197 | securityfs_create_file(name, mode, parent, ((u8 *) NULL) + key, | |
2198 | &tomoyo_operations); | |
2199 | } | |
2200 | ||
2201 | /** | |
2202 | * tomoyo_initerface_init - Initialize /sys/kernel/security/tomoyo/ interface. | |
2203 | * | |
2204 | * Returns 0. | |
2205 | */ | |
2206 | static int __init tomoyo_initerface_init(void) | |
2207 | { | |
2208 | struct dentry *tomoyo_dir; | |
2209 | ||
e5a3b95f TH |
2210 | /* Don't create securityfs entries unless registered. */ |
2211 | if (current_cred()->security != &tomoyo_kernel_domain) | |
2212 | return 0; | |
2213 | ||
9590837b KT |
2214 | tomoyo_dir = securityfs_create_dir("tomoyo", NULL); |
2215 | tomoyo_create_entry("domain_policy", 0600, tomoyo_dir, | |
2216 | TOMOYO_DOMAINPOLICY); | |
2217 | tomoyo_create_entry("exception_policy", 0600, tomoyo_dir, | |
2218 | TOMOYO_EXCEPTIONPOLICY); | |
2219 | tomoyo_create_entry("self_domain", 0400, tomoyo_dir, | |
2220 | TOMOYO_SELFDOMAIN); | |
2221 | tomoyo_create_entry(".domain_status", 0600, tomoyo_dir, | |
2222 | TOMOYO_DOMAIN_STATUS); | |
2223 | tomoyo_create_entry(".process_status", 0600, tomoyo_dir, | |
2224 | TOMOYO_PROCESS_STATUS); | |
2225 | tomoyo_create_entry("meminfo", 0600, tomoyo_dir, | |
2226 | TOMOYO_MEMINFO); | |
2227 | tomoyo_create_entry("profile", 0600, tomoyo_dir, | |
2228 | TOMOYO_PROFILE); | |
2229 | tomoyo_create_entry("manager", 0600, tomoyo_dir, | |
2230 | TOMOYO_MANAGER); | |
2231 | tomoyo_create_entry("version", 0400, tomoyo_dir, | |
2232 | TOMOYO_VERSION); | |
2233 | return 0; | |
2234 | } | |
2235 | ||
2236 | fs_initcall(tomoyo_initerface_init); |