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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> | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
9590837b KT |
14 | #include <linux/security.h> |
15 | #include <linux/hardirq.h> | |
9590837b | 16 | #include "common.h" |
9590837b | 17 | |
f737d95d TH |
18 | /* Lock for protecting policy. */ |
19 | DEFINE_MUTEX(tomoyo_policy_lock); | |
20 | ||
9590837b KT |
21 | /* Has loading policy done? */ |
22 | bool tomoyo_policy_loaded; | |
23 | ||
24 | /* String table for functionality that takes 4 modes. */ | |
25 | static const char *tomoyo_mode_4[4] = { | |
26 | "disabled", "learning", "permissive", "enforcing" | |
27 | }; | |
28 | /* String table for functionality that takes 2 modes. */ | |
29 | static const char *tomoyo_mode_2[4] = { | |
30 | "disabled", "enabled", "enabled", "enabled" | |
31 | }; | |
32 | ||
c3fa109a TH |
33 | /* |
34 | * tomoyo_control_array is a static data which contains | |
35 | * | |
36 | * (1) functionality name used by /sys/kernel/security/tomoyo/profile . | |
37 | * (2) initial values for "struct tomoyo_profile". | |
38 | * (3) max values for "struct tomoyo_profile". | |
39 | */ | |
9590837b KT |
40 | static struct { |
41 | const char *keyword; | |
42 | unsigned int current_value; | |
43 | const unsigned int max_value; | |
44 | } tomoyo_control_array[TOMOYO_MAX_CONTROL_INDEX] = { | |
45 | [TOMOYO_MAC_FOR_FILE] = { "MAC_FOR_FILE", 0, 3 }, | |
46 | [TOMOYO_MAX_ACCEPT_ENTRY] = { "MAX_ACCEPT_ENTRY", 2048, INT_MAX }, | |
47 | [TOMOYO_VERBOSE] = { "TOMOYO_VERBOSE", 1, 1 }, | |
48 | }; | |
49 | ||
c3fa109a TH |
50 | /* |
51 | * tomoyo_profile is a structure which is used for holding the mode of access | |
52 | * controls. TOMOYO has 4 modes: disabled, learning, permissive, enforcing. | |
53 | * An administrator can define up to 256 profiles. | |
54 | * The ->profile of "struct tomoyo_domain_info" is used for remembering | |
55 | * the profile's number (0 - 255) assigned to that domain. | |
56 | */ | |
9590837b KT |
57 | static struct tomoyo_profile { |
58 | unsigned int value[TOMOYO_MAX_CONTROL_INDEX]; | |
59 | const struct tomoyo_path_info *comment; | |
60 | } *tomoyo_profile_ptr[TOMOYO_MAX_PROFILES]; | |
61 | ||
62 | /* Permit policy management by non-root user? */ | |
63 | static bool tomoyo_manage_by_non_root; | |
64 | ||
65 | /* Utility functions. */ | |
66 | ||
67 | /* Open operation for /sys/kernel/security/tomoyo/ interface. */ | |
68 | static int tomoyo_open_control(const u8 type, struct file *file); | |
69 | /* Close /sys/kernel/security/tomoyo/ interface. */ | |
70 | static int tomoyo_close_control(struct file *file); | |
71 | /* Read operation for /sys/kernel/security/tomoyo/ interface. */ | |
72 | static int tomoyo_read_control(struct file *file, char __user *buffer, | |
73 | const int buffer_len); | |
74 | /* Write operation for /sys/kernel/security/tomoyo/ interface. */ | |
75 | static int tomoyo_write_control(struct file *file, const char __user *buffer, | |
76 | const int buffer_len); | |
77 | ||
78 | /** | |
79 | * tomoyo_is_byte_range - Check whether the string isa \ooo style octal value. | |
80 | * | |
81 | * @str: Pointer to the string. | |
82 | * | |
83 | * Returns true if @str is a \ooo style octal value, false otherwise. | |
84 | * | |
85 | * TOMOYO uses \ooo style representation for 0x01 - 0x20 and 0x7F - 0xFF. | |
86 | * This function verifies that \ooo is in valid range. | |
87 | */ | |
88 | static inline bool tomoyo_is_byte_range(const char *str) | |
89 | { | |
90 | return *str >= '0' && *str++ <= '3' && | |
91 | *str >= '0' && *str++ <= '7' && | |
92 | *str >= '0' && *str <= '7'; | |
93 | } | |
94 | ||
95 | /** | |
96 | * tomoyo_is_alphabet_char - Check whether the character is an alphabet. | |
97 | * | |
98 | * @c: The character to check. | |
99 | * | |
100 | * Returns true if @c is an alphabet character, false otherwise. | |
101 | */ | |
102 | static inline bool tomoyo_is_alphabet_char(const char c) | |
103 | { | |
104 | return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'); | |
105 | } | |
106 | ||
107 | /** | |
108 | * tomoyo_make_byte - Make byte value from three octal characters. | |
109 | * | |
110 | * @c1: The first character. | |
111 | * @c2: The second character. | |
112 | * @c3: The third character. | |
113 | * | |
114 | * Returns byte value. | |
115 | */ | |
116 | static inline u8 tomoyo_make_byte(const u8 c1, const u8 c2, const u8 c3) | |
117 | { | |
118 | return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0'); | |
119 | } | |
120 | ||
121 | /** | |
122 | * tomoyo_str_starts - Check whether the given string starts with the given keyword. | |
123 | * | |
124 | * @src: Pointer to pointer to the string. | |
125 | * @find: Pointer to the keyword. | |
126 | * | |
127 | * Returns true if @src starts with @find, false otherwise. | |
128 | * | |
129 | * The @src is updated to point the first character after the @find | |
130 | * if @src starts with @find. | |
131 | */ | |
132 | static bool tomoyo_str_starts(char **src, const char *find) | |
133 | { | |
134 | const int len = strlen(find); | |
135 | char *tmp = *src; | |
136 | ||
137 | if (strncmp(tmp, find, len)) | |
138 | return false; | |
139 | tmp += len; | |
140 | *src = tmp; | |
141 | return true; | |
142 | } | |
143 | ||
144 | /** | |
145 | * tomoyo_normalize_line - Format string. | |
146 | * | |
147 | * @buffer: The line to normalize. | |
148 | * | |
149 | * Leading and trailing whitespaces are removed. | |
150 | * Multiple whitespaces are packed into single space. | |
151 | * | |
152 | * Returns nothing. | |
153 | */ | |
154 | static void tomoyo_normalize_line(unsigned char *buffer) | |
155 | { | |
156 | unsigned char *sp = buffer; | |
157 | unsigned char *dp = buffer; | |
158 | bool first = true; | |
159 | ||
160 | while (tomoyo_is_invalid(*sp)) | |
161 | sp++; | |
162 | while (*sp) { | |
163 | if (!first) | |
164 | *dp++ = ' '; | |
165 | first = false; | |
166 | while (tomoyo_is_valid(*sp)) | |
167 | *dp++ = *sp++; | |
168 | while (tomoyo_is_invalid(*sp)) | |
169 | sp++; | |
170 | } | |
171 | *dp = '\0'; | |
172 | } | |
173 | ||
174 | /** | |
175 | * tomoyo_is_correct_path - Validate a pathname. | |
176 | * @filename: The pathname to check. | |
177 | * @start_type: Should the pathname start with '/'? | |
178 | * 1 = must / -1 = must not / 0 = don't care | |
179 | * @pattern_type: Can the pathname contain a wildcard? | |
180 | * 1 = must / -1 = must not / 0 = don't care | |
181 | * @end_type: Should the pathname end with '/'? | |
182 | * 1 = must / -1 = must not / 0 = don't care | |
9590837b KT |
183 | * |
184 | * Check whether the given filename follows the naming rules. | |
185 | * Returns true if @filename follows the naming rules, false otherwise. | |
186 | */ | |
187 | bool tomoyo_is_correct_path(const char *filename, const s8 start_type, | |
17080008 | 188 | const s8 pattern_type, const s8 end_type) |
9590837b | 189 | { |
7539cf4b TH |
190 | const char *const start = filename; |
191 | bool in_repetition = false; | |
9590837b KT |
192 | bool contains_pattern = false; |
193 | unsigned char c; | |
194 | unsigned char d; | |
195 | unsigned char e; | |
9590837b KT |
196 | |
197 | if (!filename) | |
198 | goto out; | |
199 | c = *filename; | |
200 | if (start_type == 1) { /* Must start with '/' */ | |
201 | if (c != '/') | |
202 | goto out; | |
203 | } else if (start_type == -1) { /* Must not start with '/' */ | |
204 | if (c == '/') | |
205 | goto out; | |
206 | } | |
207 | if (c) | |
208 | c = *(filename + strlen(filename) - 1); | |
209 | if (end_type == 1) { /* Must end with '/' */ | |
210 | if (c != '/') | |
211 | goto out; | |
212 | } else if (end_type == -1) { /* Must not end with '/' */ | |
213 | if (c == '/') | |
214 | goto out; | |
215 | } | |
7539cf4b TH |
216 | while (1) { |
217 | c = *filename++; | |
218 | if (!c) | |
219 | break; | |
9590837b | 220 | if (c == '\\') { |
7539cf4b TH |
221 | c = *filename++; |
222 | switch (c) { | |
9590837b KT |
223 | case '\\': /* "\\" */ |
224 | continue; | |
225 | case '$': /* "\$" */ | |
226 | case '+': /* "\+" */ | |
227 | case '?': /* "\?" */ | |
228 | case '*': /* "\*" */ | |
229 | case '@': /* "\@" */ | |
230 | case 'x': /* "\x" */ | |
231 | case 'X': /* "\X" */ | |
232 | case 'a': /* "\a" */ | |
233 | case 'A': /* "\A" */ | |
234 | case '-': /* "\-" */ | |
235 | if (pattern_type == -1) | |
236 | break; /* Must not contain pattern */ | |
237 | contains_pattern = true; | |
238 | continue; | |
7539cf4b TH |
239 | case '{': /* "/\{" */ |
240 | if (filename - 3 < start || | |
241 | *(filename - 3) != '/') | |
242 | break; | |
243 | if (pattern_type == -1) | |
244 | break; /* Must not contain pattern */ | |
245 | contains_pattern = true; | |
246 | in_repetition = true; | |
247 | continue; | |
248 | case '}': /* "\}/" */ | |
249 | if (*filename != '/') | |
250 | break; | |
251 | if (!in_repetition) | |
252 | break; | |
253 | in_repetition = false; | |
254 | continue; | |
9590837b KT |
255 | case '0': /* "\ooo" */ |
256 | case '1': | |
257 | case '2': | |
258 | case '3': | |
259 | d = *filename++; | |
260 | if (d < '0' || d > '7') | |
261 | break; | |
262 | e = *filename++; | |
263 | if (e < '0' || e > '7') | |
264 | break; | |
265 | c = tomoyo_make_byte(c, d, e); | |
266 | if (tomoyo_is_invalid(c)) | |
267 | continue; /* pattern is not \000 */ | |
268 | } | |
269 | goto out; | |
7539cf4b TH |
270 | } else if (in_repetition && c == '/') { |
271 | goto out; | |
9590837b KT |
272 | } else if (tomoyo_is_invalid(c)) { |
273 | goto out; | |
274 | } | |
275 | } | |
276 | if (pattern_type == 1) { /* Must contain pattern */ | |
277 | if (!contains_pattern) | |
278 | goto out; | |
279 | } | |
7539cf4b TH |
280 | if (in_repetition) |
281 | goto out; | |
9590837b KT |
282 | return true; |
283 | out: | |
9590837b KT |
284 | return false; |
285 | } | |
286 | ||
287 | /** | |
288 | * tomoyo_is_correct_domain - Check whether the given domainname follows the naming rules. | |
289 | * @domainname: The domainname to check. | |
9590837b KT |
290 | * |
291 | * Returns true if @domainname follows the naming rules, false otherwise. | |
292 | */ | |
17080008 | 293 | bool tomoyo_is_correct_domain(const unsigned char *domainname) |
9590837b KT |
294 | { |
295 | unsigned char c; | |
296 | unsigned char d; | |
297 | unsigned char e; | |
9590837b KT |
298 | |
299 | if (!domainname || strncmp(domainname, TOMOYO_ROOT_NAME, | |
300 | TOMOYO_ROOT_NAME_LEN)) | |
301 | goto out; | |
302 | domainname += TOMOYO_ROOT_NAME_LEN; | |
303 | if (!*domainname) | |
304 | return true; | |
305 | do { | |
306 | if (*domainname++ != ' ') | |
307 | goto out; | |
308 | if (*domainname++ != '/') | |
309 | goto out; | |
310 | while ((c = *domainname) != '\0' && c != ' ') { | |
311 | domainname++; | |
312 | if (c == '\\') { | |
313 | c = *domainname++; | |
314 | switch ((c)) { | |
315 | case '\\': /* "\\" */ | |
316 | continue; | |
317 | case '0': /* "\ooo" */ | |
318 | case '1': | |
319 | case '2': | |
320 | case '3': | |
321 | d = *domainname++; | |
322 | if (d < '0' || d > '7') | |
323 | break; | |
324 | e = *domainname++; | |
325 | if (e < '0' || e > '7') | |
326 | break; | |
327 | c = tomoyo_make_byte(c, d, e); | |
328 | if (tomoyo_is_invalid(c)) | |
329 | /* pattern is not \000 */ | |
330 | continue; | |
331 | } | |
332 | goto out; | |
333 | } else if (tomoyo_is_invalid(c)) { | |
334 | goto out; | |
335 | } | |
336 | } | |
337 | } while (*domainname); | |
338 | return true; | |
339 | out: | |
9590837b KT |
340 | return false; |
341 | } | |
342 | ||
343 | /** | |
344 | * tomoyo_is_domain_def - Check whether the given token can be a domainname. | |
345 | * | |
346 | * @buffer: The token to check. | |
347 | * | |
348 | * Returns true if @buffer possibly be a domainname, false otherwise. | |
349 | */ | |
350 | bool tomoyo_is_domain_def(const unsigned char *buffer) | |
351 | { | |
352 | return !strncmp(buffer, TOMOYO_ROOT_NAME, TOMOYO_ROOT_NAME_LEN); | |
353 | } | |
354 | ||
355 | /** | |
356 | * tomoyo_find_domain - Find a domain by the given name. | |
357 | * | |
358 | * @domainname: The domainname to find. | |
359 | * | |
9590837b | 360 | * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise. |
fdb8ebb7 TH |
361 | * |
362 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
363 | */ |
364 | struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname) | |
365 | { | |
366 | struct tomoyo_domain_info *domain; | |
367 | struct tomoyo_path_info name; | |
368 | ||
369 | name.name = domainname; | |
370 | tomoyo_fill_path_info(&name); | |
fdb8ebb7 | 371 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
9590837b KT |
372 | if (!domain->is_deleted && |
373 | !tomoyo_pathcmp(&name, domain->domainname)) | |
374 | return domain; | |
375 | } | |
376 | return NULL; | |
377 | } | |
378 | ||
9590837b KT |
379 | /** |
380 | * tomoyo_const_part_length - Evaluate the initial length without a pattern in a token. | |
381 | * | |
382 | * @filename: The string to evaluate. | |
383 | * | |
384 | * Returns the initial length without a pattern in @filename. | |
385 | */ | |
386 | static int tomoyo_const_part_length(const char *filename) | |
387 | { | |
388 | char c; | |
389 | int len = 0; | |
390 | ||
391 | if (!filename) | |
392 | return 0; | |
393 | while ((c = *filename++) != '\0') { | |
394 | if (c != '\\') { | |
395 | len++; | |
396 | continue; | |
397 | } | |
398 | c = *filename++; | |
399 | switch (c) { | |
400 | case '\\': /* "\\" */ | |
401 | len += 2; | |
402 | continue; | |
403 | case '0': /* "\ooo" */ | |
404 | case '1': | |
405 | case '2': | |
406 | case '3': | |
407 | c = *filename++; | |
408 | if (c < '0' || c > '7') | |
409 | break; | |
410 | c = *filename++; | |
411 | if (c < '0' || c > '7') | |
412 | break; | |
413 | len += 4; | |
414 | continue; | |
415 | } | |
416 | break; | |
417 | } | |
418 | return len; | |
419 | } | |
420 | ||
421 | /** | |
422 | * tomoyo_fill_path_info - Fill in "struct tomoyo_path_info" members. | |
423 | * | |
424 | * @ptr: Pointer to "struct tomoyo_path_info" to fill in. | |
425 | * | |
426 | * The caller sets "struct tomoyo_path_info"->name. | |
427 | */ | |
428 | void tomoyo_fill_path_info(struct tomoyo_path_info *ptr) | |
429 | { | |
430 | const char *name = ptr->name; | |
431 | const int len = strlen(name); | |
432 | ||
9590837b KT |
433 | ptr->const_len = tomoyo_const_part_length(name); |
434 | ptr->is_dir = len && (name[len - 1] == '/'); | |
435 | ptr->is_patterned = (ptr->const_len < len); | |
436 | ptr->hash = full_name_hash(name, len); | |
9590837b KT |
437 | } |
438 | ||
439 | /** | |
7539cf4b | 440 | * tomoyo_file_matches_pattern2 - Pattern matching without '/' character |
9590837b KT |
441 | * and "\-" pattern. |
442 | * | |
443 | * @filename: The start of string to check. | |
444 | * @filename_end: The end of string to check. | |
445 | * @pattern: The start of pattern to compare. | |
446 | * @pattern_end: The end of pattern to compare. | |
447 | * | |
448 | * Returns true if @filename matches @pattern, false otherwise. | |
449 | */ | |
7539cf4b TH |
450 | static bool tomoyo_file_matches_pattern2(const char *filename, |
451 | const char *filename_end, | |
452 | const char *pattern, | |
453 | const char *pattern_end) | |
9590837b KT |
454 | { |
455 | while (filename < filename_end && pattern < pattern_end) { | |
456 | char c; | |
457 | if (*pattern != '\\') { | |
458 | if (*filename++ != *pattern++) | |
459 | return false; | |
460 | continue; | |
461 | } | |
462 | c = *filename; | |
463 | pattern++; | |
464 | switch (*pattern) { | |
465 | int i; | |
466 | int j; | |
467 | case '?': | |
468 | if (c == '/') { | |
469 | return false; | |
470 | } else if (c == '\\') { | |
471 | if (filename[1] == '\\') | |
472 | filename++; | |
473 | else if (tomoyo_is_byte_range(filename + 1)) | |
474 | filename += 3; | |
475 | else | |
476 | return false; | |
477 | } | |
478 | break; | |
479 | case '\\': | |
480 | if (c != '\\') | |
481 | return false; | |
482 | if (*++filename != '\\') | |
483 | return false; | |
484 | break; | |
485 | case '+': | |
486 | if (!isdigit(c)) | |
487 | return false; | |
488 | break; | |
489 | case 'x': | |
490 | if (!isxdigit(c)) | |
491 | return false; | |
492 | break; | |
493 | case 'a': | |
494 | if (!tomoyo_is_alphabet_char(c)) | |
495 | return false; | |
496 | break; | |
497 | case '0': | |
498 | case '1': | |
499 | case '2': | |
500 | case '3': | |
501 | if (c == '\\' && tomoyo_is_byte_range(filename + 1) | |
502 | && strncmp(filename + 1, pattern, 3) == 0) { | |
503 | filename += 3; | |
504 | pattern += 2; | |
505 | break; | |
506 | } | |
507 | return false; /* Not matched. */ | |
508 | case '*': | |
509 | case '@': | |
510 | for (i = 0; i <= filename_end - filename; i++) { | |
7539cf4b | 511 | if (tomoyo_file_matches_pattern2( |
9590837b KT |
512 | filename + i, filename_end, |
513 | pattern + 1, pattern_end)) | |
514 | return true; | |
515 | c = filename[i]; | |
516 | if (c == '.' && *pattern == '@') | |
517 | break; | |
518 | if (c != '\\') | |
519 | continue; | |
520 | if (filename[i + 1] == '\\') | |
521 | i++; | |
522 | else if (tomoyo_is_byte_range(filename + i + 1)) | |
523 | i += 3; | |
524 | else | |
525 | break; /* Bad pattern. */ | |
526 | } | |
527 | return false; /* Not matched. */ | |
528 | default: | |
529 | j = 0; | |
530 | c = *pattern; | |
531 | if (c == '$') { | |
532 | while (isdigit(filename[j])) | |
533 | j++; | |
534 | } else if (c == 'X') { | |
535 | while (isxdigit(filename[j])) | |
536 | j++; | |
537 | } else if (c == 'A') { | |
538 | while (tomoyo_is_alphabet_char(filename[j])) | |
539 | j++; | |
540 | } | |
541 | for (i = 1; i <= j; i++) { | |
7539cf4b | 542 | if (tomoyo_file_matches_pattern2( |
9590837b KT |
543 | filename + i, filename_end, |
544 | pattern + 1, pattern_end)) | |
545 | return true; | |
546 | } | |
547 | return false; /* Not matched or bad pattern. */ | |
548 | } | |
549 | filename++; | |
550 | pattern++; | |
551 | } | |
552 | while (*pattern == '\\' && | |
553 | (*(pattern + 1) == '*' || *(pattern + 1) == '@')) | |
554 | pattern += 2; | |
555 | return filename == filename_end && pattern == pattern_end; | |
556 | } | |
557 | ||
558 | /** | |
7539cf4b | 559 | * tomoyo_file_matches_pattern - Pattern matching without without '/' character. |
9590837b KT |
560 | * |
561 | * @filename: The start of string to check. | |
562 | * @filename_end: The end of string to check. | |
563 | * @pattern: The start of pattern to compare. | |
564 | * @pattern_end: The end of pattern to compare. | |
565 | * | |
566 | * Returns true if @filename matches @pattern, false otherwise. | |
567 | */ | |
7539cf4b | 568 | static bool tomoyo_file_matches_pattern(const char *filename, |
9590837b KT |
569 | const char *filename_end, |
570 | const char *pattern, | |
571 | const char *pattern_end) | |
572 | { | |
573 | const char *pattern_start = pattern; | |
574 | bool first = true; | |
575 | bool result; | |
576 | ||
577 | while (pattern < pattern_end - 1) { | |
578 | /* Split at "\-" pattern. */ | |
579 | if (*pattern++ != '\\' || *pattern++ != '-') | |
580 | continue; | |
7539cf4b TH |
581 | result = tomoyo_file_matches_pattern2(filename, |
582 | filename_end, | |
583 | pattern_start, | |
584 | pattern - 2); | |
9590837b KT |
585 | if (first) |
586 | result = !result; | |
587 | if (result) | |
588 | return false; | |
589 | first = false; | |
590 | pattern_start = pattern; | |
591 | } | |
7539cf4b TH |
592 | result = tomoyo_file_matches_pattern2(filename, filename_end, |
593 | pattern_start, pattern_end); | |
9590837b KT |
594 | return first ? result : !result; |
595 | } | |
596 | ||
7539cf4b TH |
597 | /** |
598 | * tomoyo_path_matches_pattern2 - Do pathname pattern matching. | |
599 | * | |
600 | * @f: The start of string to check. | |
601 | * @p: The start of pattern to compare. | |
602 | * | |
603 | * Returns true if @f matches @p, false otherwise. | |
604 | */ | |
605 | static bool tomoyo_path_matches_pattern2(const char *f, const char *p) | |
606 | { | |
607 | const char *f_delimiter; | |
608 | const char *p_delimiter; | |
609 | ||
610 | while (*f && *p) { | |
611 | f_delimiter = strchr(f, '/'); | |
612 | if (!f_delimiter) | |
613 | f_delimiter = f + strlen(f); | |
614 | p_delimiter = strchr(p, '/'); | |
615 | if (!p_delimiter) | |
616 | p_delimiter = p + strlen(p); | |
617 | if (*p == '\\' && *(p + 1) == '{') | |
618 | goto recursive; | |
619 | if (!tomoyo_file_matches_pattern(f, f_delimiter, p, | |
620 | p_delimiter)) | |
621 | return false; | |
622 | f = f_delimiter; | |
623 | if (*f) | |
624 | f++; | |
625 | p = p_delimiter; | |
626 | if (*p) | |
627 | p++; | |
628 | } | |
629 | /* Ignore trailing "\*" and "\@" in @pattern. */ | |
630 | while (*p == '\\' && | |
631 | (*(p + 1) == '*' || *(p + 1) == '@')) | |
632 | p += 2; | |
633 | return !*f && !*p; | |
634 | recursive: | |
635 | /* | |
636 | * The "\{" pattern is permitted only after '/' character. | |
637 | * This guarantees that below "*(p - 1)" is safe. | |
638 | * Also, the "\}" pattern is permitted only before '/' character | |
639 | * so that "\{" + "\}" pair will not break the "\-" operator. | |
640 | */ | |
641 | if (*(p - 1) != '/' || p_delimiter <= p + 3 || *p_delimiter != '/' || | |
642 | *(p_delimiter - 1) != '}' || *(p_delimiter - 2) != '\\') | |
643 | return false; /* Bad pattern. */ | |
644 | do { | |
645 | /* Compare current component with pattern. */ | |
646 | if (!tomoyo_file_matches_pattern(f, f_delimiter, p + 2, | |
647 | p_delimiter - 2)) | |
648 | break; | |
649 | /* Proceed to next component. */ | |
650 | f = f_delimiter; | |
651 | if (!*f) | |
652 | break; | |
653 | f++; | |
654 | /* Continue comparison. */ | |
655 | if (tomoyo_path_matches_pattern2(f, p_delimiter + 1)) | |
656 | return true; | |
657 | f_delimiter = strchr(f, '/'); | |
658 | } while (f_delimiter); | |
659 | return false; /* Not matched. */ | |
660 | } | |
661 | ||
9590837b KT |
662 | /** |
663 | * tomoyo_path_matches_pattern - Check whether the given filename matches the given pattern. | |
7539cf4b | 664 | * |
9590837b KT |
665 | * @filename: The filename to check. |
666 | * @pattern: The pattern to compare. | |
667 | * | |
668 | * Returns true if matches, false otherwise. | |
669 | * | |
670 | * The following patterns are available. | |
671 | * \\ \ itself. | |
672 | * \ooo Octal representation of a byte. | |
7539cf4b TH |
673 | * \* Zero or more repetitions of characters other than '/'. |
674 | * \@ Zero or more repetitions of characters other than '/' or '.'. | |
9590837b | 675 | * \? 1 byte character other than '/'. |
7539cf4b | 676 | * \$ One or more repetitions of decimal digits. |
9590837b | 677 | * \+ 1 decimal digit. |
7539cf4b | 678 | * \X One or more repetitions of hexadecimal digits. |
9590837b | 679 | * \x 1 hexadecimal digit. |
7539cf4b | 680 | * \A One or more repetitions of alphabet characters. |
9590837b | 681 | * \a 1 alphabet character. |
7539cf4b | 682 | * |
9590837b | 683 | * \- Subtraction operator. |
7539cf4b TH |
684 | * |
685 | * /\{dir\}/ '/' + 'One or more repetitions of dir/' (e.g. /dir/ /dir/dir/ | |
686 | * /dir/dir/dir/ ). | |
9590837b KT |
687 | */ |
688 | bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename, | |
689 | const struct tomoyo_path_info *pattern) | |
690 | { | |
9590837b KT |
691 | const char *f = filename->name; |
692 | const char *p = pattern->name; | |
693 | const int len = pattern->const_len; | |
694 | ||
695 | /* If @pattern doesn't contain pattern, I can use strcmp(). */ | |
696 | if (!pattern->is_patterned) | |
697 | return !tomoyo_pathcmp(filename, pattern); | |
7539cf4b TH |
698 | /* Don't compare directory and non-directory. */ |
699 | if (filename->is_dir != pattern->is_dir) | |
9590837b KT |
700 | return false; |
701 | /* Compare the initial length without patterns. */ | |
702 | if (strncmp(f, p, len)) | |
703 | return false; | |
704 | f += len; | |
705 | p += len; | |
7539cf4b | 706 | return tomoyo_path_matches_pattern2(f, p); |
9590837b KT |
707 | } |
708 | ||
709 | /** | |
710 | * tomoyo_io_printf - Transactional printf() to "struct tomoyo_io_buffer" structure. | |
711 | * | |
712 | * @head: Pointer to "struct tomoyo_io_buffer". | |
713 | * @fmt: The printf()'s format string, followed by parameters. | |
714 | * | |
715 | * Returns true if output was written, false otherwise. | |
716 | * | |
717 | * The snprintf() will truncate, but tomoyo_io_printf() won't. | |
718 | */ | |
719 | bool tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...) | |
720 | { | |
721 | va_list args; | |
722 | int len; | |
723 | int pos = head->read_avail; | |
724 | int size = head->readbuf_size - pos; | |
725 | ||
726 | if (size <= 0) | |
727 | return false; | |
728 | va_start(args, fmt); | |
729 | len = vsnprintf(head->read_buf + pos, size, fmt, args); | |
730 | va_end(args); | |
731 | if (pos + len >= head->readbuf_size) | |
732 | return false; | |
733 | head->read_avail += len; | |
734 | return true; | |
735 | } | |
736 | ||
737 | /** | |
738 | * tomoyo_get_exe - Get tomoyo_realpath() of current process. | |
739 | * | |
740 | * Returns the tomoyo_realpath() of current process on success, NULL otherwise. | |
741 | * | |
8e2d39a1 | 742 | * This function uses kzalloc(), so the caller must call kfree() |
9590837b KT |
743 | * if this function didn't return NULL. |
744 | */ | |
745 | static const char *tomoyo_get_exe(void) | |
746 | { | |
747 | struct mm_struct *mm = current->mm; | |
748 | struct vm_area_struct *vma; | |
749 | const char *cp = NULL; | |
750 | ||
751 | if (!mm) | |
752 | return NULL; | |
753 | down_read(&mm->mmap_sem); | |
754 | for (vma = mm->mmap; vma; vma = vma->vm_next) { | |
755 | if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) { | |
756 | cp = tomoyo_realpath_from_path(&vma->vm_file->f_path); | |
757 | break; | |
758 | } | |
759 | } | |
760 | up_read(&mm->mmap_sem); | |
761 | return cp; | |
762 | } | |
763 | ||
764 | /** | |
765 | * tomoyo_get_msg - Get warning message. | |
766 | * | |
767 | * @is_enforce: Is it enforcing mode? | |
768 | * | |
769 | * Returns "ERROR" or "WARNING". | |
770 | */ | |
771 | const char *tomoyo_get_msg(const bool is_enforce) | |
772 | { | |
773 | if (is_enforce) | |
774 | return "ERROR"; | |
775 | else | |
776 | return "WARNING"; | |
777 | } | |
778 | ||
779 | /** | |
780 | * tomoyo_check_flags - Check mode for specified functionality. | |
781 | * | |
782 | * @domain: Pointer to "struct tomoyo_domain_info". | |
783 | * @index: The functionality to check mode. | |
784 | * | |
785 | * TOMOYO checks only process context. | |
786 | * This code disables TOMOYO's enforcement in case the function is called from | |
787 | * interrupt context. | |
788 | */ | |
789 | unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain, | |
790 | const u8 index) | |
791 | { | |
792 | const u8 profile = domain->profile; | |
793 | ||
794 | if (WARN_ON(in_interrupt())) | |
795 | return 0; | |
796 | return tomoyo_policy_loaded && index < TOMOYO_MAX_CONTROL_INDEX | |
797 | #if TOMOYO_MAX_PROFILES != 256 | |
798 | && profile < TOMOYO_MAX_PROFILES | |
799 | #endif | |
800 | && tomoyo_profile_ptr[profile] ? | |
801 | tomoyo_profile_ptr[profile]->value[index] : 0; | |
802 | } | |
803 | ||
804 | /** | |
805 | * tomoyo_verbose_mode - Check whether TOMOYO is verbose mode. | |
806 | * | |
807 | * @domain: Pointer to "struct tomoyo_domain_info". | |
808 | * | |
809 | * Returns true if domain policy violation warning should be printed to | |
810 | * console. | |
811 | */ | |
812 | bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain) | |
813 | { | |
814 | return tomoyo_check_flags(domain, TOMOYO_VERBOSE) != 0; | |
815 | } | |
816 | ||
817 | /** | |
818 | * tomoyo_domain_quota_is_ok - Check for domain's quota. | |
819 | * | |
820 | * @domain: Pointer to "struct tomoyo_domain_info". | |
821 | * | |
822 | * Returns true if the domain is not exceeded quota, false otherwise. | |
fdb8ebb7 TH |
823 | * |
824 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
825 | */ |
826 | bool tomoyo_domain_quota_is_ok(struct tomoyo_domain_info * const domain) | |
827 | { | |
828 | unsigned int count = 0; | |
829 | struct tomoyo_acl_info *ptr; | |
830 | ||
831 | if (!domain) | |
832 | return true; | |
fdb8ebb7 | 833 | list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
ea13ddba | 834 | switch (ptr->type) { |
7ef61233 | 835 | struct tomoyo_path_acl *acl; |
937bf613 TH |
836 | u32 perm; |
837 | u8 i; | |
7ef61233 TH |
838 | case TOMOYO_TYPE_PATH_ACL: |
839 | acl = container_of(ptr, struct tomoyo_path_acl, head); | |
937bf613 | 840 | perm = acl->perm | (((u32) acl->perm_high) << 16); |
7ef61233 | 841 | for (i = 0; i < TOMOYO_MAX_PATH_OPERATION; i++) |
937bf613 TH |
842 | if (perm & (1 << i)) |
843 | count++; | |
7ef61233 | 844 | if (perm & (1 << TOMOYO_TYPE_READ_WRITE)) |
937bf613 | 845 | count -= 2; |
9590837b | 846 | break; |
7ef61233 TH |
847 | case TOMOYO_TYPE_PATH2_ACL: |
848 | perm = container_of(ptr, struct tomoyo_path2_acl, head) | |
849 | ->perm; | |
850 | for (i = 0; i < TOMOYO_MAX_PATH2_OPERATION; i++) | |
937bf613 TH |
851 | if (perm & (1 << i)) |
852 | count++; | |
9590837b KT |
853 | break; |
854 | } | |
855 | } | |
9590837b KT |
856 | if (count < tomoyo_check_flags(domain, TOMOYO_MAX_ACCEPT_ENTRY)) |
857 | return true; | |
858 | if (!domain->quota_warned) { | |
859 | domain->quota_warned = true; | |
860 | printk(KERN_WARNING "TOMOYO-WARNING: " | |
861 | "Domain '%s' has so many ACLs to hold. " | |
862 | "Stopped learning mode.\n", domain->domainname->name); | |
863 | } | |
864 | return false; | |
865 | } | |
866 | ||
867 | /** | |
868 | * tomoyo_find_or_assign_new_profile - Create a new profile. | |
869 | * | |
870 | * @profile: Profile number to create. | |
871 | * | |
872 | * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise. | |
873 | */ | |
874 | static struct tomoyo_profile *tomoyo_find_or_assign_new_profile(const unsigned | |
875 | int profile) | |
876 | { | |
9590837b KT |
877 | struct tomoyo_profile *ptr = NULL; |
878 | int i; | |
879 | ||
880 | if (profile >= TOMOYO_MAX_PROFILES) | |
881 | return NULL; | |
29282381 TH |
882 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
883 | return NULL; | |
9590837b KT |
884 | ptr = tomoyo_profile_ptr[profile]; |
885 | if (ptr) | |
886 | goto ok; | |
4e5d6f7e | 887 | ptr = kmalloc(sizeof(*ptr), GFP_NOFS); |
cd7bec6a TH |
888 | if (!tomoyo_memory_ok(ptr)) { |
889 | kfree(ptr); | |
181427a7 | 890 | ptr = NULL; |
9590837b | 891 | goto ok; |
cd7bec6a | 892 | } |
9590837b KT |
893 | for (i = 0; i < TOMOYO_MAX_CONTROL_INDEX; i++) |
894 | ptr->value[i] = tomoyo_control_array[i].current_value; | |
895 | mb(); /* Avoid out-of-order execution. */ | |
896 | tomoyo_profile_ptr[profile] = ptr; | |
897 | ok: | |
29282381 | 898 | mutex_unlock(&tomoyo_policy_lock); |
9590837b KT |
899 | return ptr; |
900 | } | |
901 | ||
902 | /** | |
903 | * tomoyo_write_profile - Write to profile table. | |
904 | * | |
905 | * @head: Pointer to "struct tomoyo_io_buffer". | |
906 | * | |
907 | * Returns 0 on success, negative value otherwise. | |
908 | */ | |
909 | static int tomoyo_write_profile(struct tomoyo_io_buffer *head) | |
910 | { | |
911 | char *data = head->write_buf; | |
912 | unsigned int i; | |
913 | unsigned int value; | |
914 | char *cp; | |
915 | struct tomoyo_profile *profile; | |
916 | unsigned long num; | |
917 | ||
918 | cp = strchr(data, '-'); | |
919 | if (cp) | |
920 | *cp = '\0'; | |
921 | if (strict_strtoul(data, 10, &num)) | |
922 | return -EINVAL; | |
923 | if (cp) | |
924 | data = cp + 1; | |
925 | profile = tomoyo_find_or_assign_new_profile(num); | |
926 | if (!profile) | |
927 | return -EINVAL; | |
928 | cp = strchr(data, '='); | |
929 | if (!cp) | |
930 | return -EINVAL; | |
931 | *cp = '\0'; | |
932 | if (!strcmp(data, "COMMENT")) { | |
bf24fb01 TH |
933 | const struct tomoyo_path_info *old_comment = profile->comment; |
934 | profile->comment = tomoyo_get_name(cp + 1); | |
935 | tomoyo_put_name(old_comment); | |
9590837b KT |
936 | return 0; |
937 | } | |
938 | for (i = 0; i < TOMOYO_MAX_CONTROL_INDEX; i++) { | |
939 | if (strcmp(data, tomoyo_control_array[i].keyword)) | |
940 | continue; | |
941 | if (sscanf(cp + 1, "%u", &value) != 1) { | |
942 | int j; | |
943 | const char **modes; | |
944 | switch (i) { | |
945 | case TOMOYO_VERBOSE: | |
946 | modes = tomoyo_mode_2; | |
947 | break; | |
948 | default: | |
949 | modes = tomoyo_mode_4; | |
950 | break; | |
951 | } | |
952 | for (j = 0; j < 4; j++) { | |
953 | if (strcmp(cp + 1, modes[j])) | |
954 | continue; | |
955 | value = j; | |
956 | break; | |
957 | } | |
958 | if (j == 4) | |
959 | return -EINVAL; | |
960 | } else if (value > tomoyo_control_array[i].max_value) { | |
961 | value = tomoyo_control_array[i].max_value; | |
962 | } | |
963 | profile->value[i] = value; | |
964 | return 0; | |
965 | } | |
966 | return -EINVAL; | |
967 | } | |
968 | ||
969 | /** | |
970 | * tomoyo_read_profile - Read from profile table. | |
971 | * | |
972 | * @head: Pointer to "struct tomoyo_io_buffer". | |
973 | * | |
974 | * Returns 0. | |
975 | */ | |
976 | static int tomoyo_read_profile(struct tomoyo_io_buffer *head) | |
977 | { | |
978 | static const int total = TOMOYO_MAX_CONTROL_INDEX + 1; | |
979 | int step; | |
980 | ||
981 | if (head->read_eof) | |
982 | return 0; | |
983 | for (step = head->read_step; step < TOMOYO_MAX_PROFILES * total; | |
984 | step++) { | |
985 | const u8 index = step / total; | |
986 | u8 type = step % total; | |
987 | const struct tomoyo_profile *profile | |
988 | = tomoyo_profile_ptr[index]; | |
989 | head->read_step = step; | |
990 | if (!profile) | |
991 | continue; | |
992 | if (!type) { /* Print profile' comment tag. */ | |
993 | if (!tomoyo_io_printf(head, "%u-COMMENT=%s\n", | |
994 | index, profile->comment ? | |
995 | profile->comment->name : "")) | |
996 | break; | |
997 | continue; | |
998 | } | |
999 | type--; | |
1000 | if (type < TOMOYO_MAX_CONTROL_INDEX) { | |
1001 | const unsigned int value = profile->value[type]; | |
1002 | const char **modes = NULL; | |
1003 | const char *keyword | |
1004 | = tomoyo_control_array[type].keyword; | |
1005 | switch (tomoyo_control_array[type].max_value) { | |
1006 | case 3: | |
1007 | modes = tomoyo_mode_4; | |
1008 | break; | |
1009 | case 1: | |
1010 | modes = tomoyo_mode_2; | |
1011 | break; | |
1012 | } | |
1013 | if (modes) { | |
1014 | if (!tomoyo_io_printf(head, "%u-%s=%s\n", index, | |
1015 | keyword, modes[value])) | |
1016 | break; | |
1017 | } else { | |
1018 | if (!tomoyo_io_printf(head, "%u-%s=%u\n", index, | |
1019 | keyword, value)) | |
1020 | break; | |
1021 | } | |
1022 | } | |
1023 | } | |
1024 | if (step == TOMOYO_MAX_PROFILES * total) | |
1025 | head->read_eof = true; | |
1026 | return 0; | |
1027 | } | |
1028 | ||
c3fa109a TH |
1029 | /* |
1030 | * tomoyo_policy_manager_list is used for holding list of domainnames or | |
1031 | * programs which are permitted to modify configuration via | |
1032 | * /sys/kernel/security/tomoyo/ interface. | |
1033 | * | |
1034 | * An entry is added by | |
1035 | * | |
1036 | * # echo '<kernel> /sbin/mingetty /bin/login /bin/bash' > \ | |
1037 | * /sys/kernel/security/tomoyo/manager | |
1038 | * (if you want to specify by a domainname) | |
1039 | * | |
1040 | * or | |
1041 | * | |
1042 | * # echo '/usr/lib/ccs/editpolicy' > /sys/kernel/security/tomoyo/manager | |
1043 | * (if you want to specify by a program's location) | |
1044 | * | |
1045 | * and is deleted by | |
1046 | * | |
1047 | * # echo 'delete <kernel> /sbin/mingetty /bin/login /bin/bash' > \ | |
1048 | * /sys/kernel/security/tomoyo/manager | |
1049 | * | |
1050 | * or | |
1051 | * | |
1052 | * # echo 'delete /usr/lib/ccs/editpolicy' > \ | |
1053 | * /sys/kernel/security/tomoyo/manager | |
1054 | * | |
1055 | * and all entries are retrieved by | |
1056 | * | |
1057 | * # cat /sys/kernel/security/tomoyo/manager | |
1058 | */ | |
847b173e | 1059 | LIST_HEAD(tomoyo_policy_manager_list); |
9590837b KT |
1060 | |
1061 | /** | |
1062 | * tomoyo_update_manager_entry - Add a manager entry. | |
1063 | * | |
1064 | * @manager: The path to manager or the domainnamme. | |
1065 | * @is_delete: True if it is a delete request. | |
1066 | * | |
1067 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1068 | * |
1069 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1070 | */ |
1071 | static int tomoyo_update_manager_entry(const char *manager, | |
1072 | const bool is_delete) | |
1073 | { | |
ca0b7df3 | 1074 | struct tomoyo_policy_manager_entry *entry = NULL; |
9590837b KT |
1075 | struct tomoyo_policy_manager_entry *ptr; |
1076 | const struct tomoyo_path_info *saved_manager; | |
ca0b7df3 | 1077 | int error = is_delete ? -ENOENT : -ENOMEM; |
9590837b KT |
1078 | bool is_domain = false; |
1079 | ||
1080 | if (tomoyo_is_domain_def(manager)) { | |
17080008 | 1081 | if (!tomoyo_is_correct_domain(manager)) |
9590837b KT |
1082 | return -EINVAL; |
1083 | is_domain = true; | |
1084 | } else { | |
17080008 | 1085 | if (!tomoyo_is_correct_path(manager, 1, -1, -1)) |
9590837b KT |
1086 | return -EINVAL; |
1087 | } | |
bf24fb01 | 1088 | saved_manager = tomoyo_get_name(manager); |
9590837b KT |
1089 | if (!saved_manager) |
1090 | return -ENOMEM; | |
ca0b7df3 | 1091 | if (!is_delete) |
4e5d6f7e | 1092 | entry = kmalloc(sizeof(*entry), GFP_NOFS); |
29282381 TH |
1093 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
1094 | goto out; | |
fdb8ebb7 | 1095 | list_for_each_entry_rcu(ptr, &tomoyo_policy_manager_list, list) { |
9590837b KT |
1096 | if (ptr->manager != saved_manager) |
1097 | continue; | |
1098 | ptr->is_deleted = is_delete; | |
1099 | error = 0; | |
ca0b7df3 | 1100 | break; |
9590837b | 1101 | } |
ca0b7df3 TH |
1102 | if (!is_delete && error && tomoyo_memory_ok(entry)) { |
1103 | entry->manager = saved_manager; | |
bf24fb01 | 1104 | saved_manager = NULL; |
ca0b7df3 TH |
1105 | entry->is_domain = is_domain; |
1106 | list_add_tail_rcu(&entry->list, &tomoyo_policy_manager_list); | |
1107 | entry = NULL; | |
1108 | error = 0; | |
9590837b | 1109 | } |
f737d95d | 1110 | mutex_unlock(&tomoyo_policy_lock); |
29282381 | 1111 | out: |
bf24fb01 | 1112 | tomoyo_put_name(saved_manager); |
ca0b7df3 | 1113 | kfree(entry); |
9590837b KT |
1114 | return error; |
1115 | } | |
1116 | ||
1117 | /** | |
1118 | * tomoyo_write_manager_policy - Write manager policy. | |
1119 | * | |
1120 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1121 | * | |
1122 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1123 | * |
1124 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1125 | */ |
1126 | static int tomoyo_write_manager_policy(struct tomoyo_io_buffer *head) | |
1127 | { | |
1128 | char *data = head->write_buf; | |
1129 | bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE); | |
1130 | ||
1131 | if (!strcmp(data, "manage_by_non_root")) { | |
1132 | tomoyo_manage_by_non_root = !is_delete; | |
1133 | return 0; | |
1134 | } | |
1135 | return tomoyo_update_manager_entry(data, is_delete); | |
1136 | } | |
1137 | ||
1138 | /** | |
1139 | * tomoyo_read_manager_policy - Read manager policy. | |
1140 | * | |
1141 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1142 | * | |
1143 | * Returns 0. | |
fdb8ebb7 TH |
1144 | * |
1145 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1146 | */ |
1147 | static int tomoyo_read_manager_policy(struct tomoyo_io_buffer *head) | |
1148 | { | |
1149 | struct list_head *pos; | |
1150 | bool done = true; | |
1151 | ||
1152 | if (head->read_eof) | |
1153 | return 0; | |
9590837b KT |
1154 | list_for_each_cookie(pos, head->read_var2, |
1155 | &tomoyo_policy_manager_list) { | |
1156 | struct tomoyo_policy_manager_entry *ptr; | |
1157 | ptr = list_entry(pos, struct tomoyo_policy_manager_entry, | |
1158 | list); | |
1159 | if (ptr->is_deleted) | |
1160 | continue; | |
7d2948b1 TH |
1161 | done = tomoyo_io_printf(head, "%s\n", ptr->manager->name); |
1162 | if (!done) | |
9590837b | 1163 | break; |
9590837b | 1164 | } |
9590837b KT |
1165 | head->read_eof = done; |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | /** | |
1170 | * tomoyo_is_policy_manager - Check whether the current process is a policy manager. | |
1171 | * | |
1172 | * Returns true if the current process is permitted to modify policy | |
1173 | * via /sys/kernel/security/tomoyo/ interface. | |
fdb8ebb7 TH |
1174 | * |
1175 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1176 | */ |
1177 | static bool tomoyo_is_policy_manager(void) | |
1178 | { | |
1179 | struct tomoyo_policy_manager_entry *ptr; | |
1180 | const char *exe; | |
1181 | const struct task_struct *task = current; | |
1182 | const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname; | |
1183 | bool found = false; | |
1184 | ||
1185 | if (!tomoyo_policy_loaded) | |
1186 | return true; | |
1187 | if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid)) | |
1188 | return false; | |
fdb8ebb7 | 1189 | list_for_each_entry_rcu(ptr, &tomoyo_policy_manager_list, list) { |
9590837b KT |
1190 | if (!ptr->is_deleted && ptr->is_domain |
1191 | && !tomoyo_pathcmp(domainname, ptr->manager)) { | |
1192 | found = true; | |
1193 | break; | |
1194 | } | |
1195 | } | |
9590837b KT |
1196 | if (found) |
1197 | return true; | |
1198 | exe = tomoyo_get_exe(); | |
1199 | if (!exe) | |
1200 | return false; | |
fdb8ebb7 | 1201 | list_for_each_entry_rcu(ptr, &tomoyo_policy_manager_list, list) { |
9590837b KT |
1202 | if (!ptr->is_deleted && !ptr->is_domain |
1203 | && !strcmp(exe, ptr->manager->name)) { | |
1204 | found = true; | |
1205 | break; | |
1206 | } | |
1207 | } | |
9590837b KT |
1208 | if (!found) { /* Reduce error messages. */ |
1209 | static pid_t last_pid; | |
1210 | const pid_t pid = current->pid; | |
1211 | if (last_pid != pid) { | |
1212 | printk(KERN_WARNING "%s ( %s ) is not permitted to " | |
1213 | "update policies.\n", domainname->name, exe); | |
1214 | last_pid = pid; | |
1215 | } | |
1216 | } | |
8e2d39a1 | 1217 | kfree(exe); |
9590837b KT |
1218 | return found; |
1219 | } | |
1220 | ||
1221 | /** | |
1222 | * tomoyo_is_select_one - Parse select command. | |
1223 | * | |
1224 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1225 | * @data: String to parse. | |
1226 | * | |
1227 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
1228 | * |
1229 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1230 | */ |
1231 | static bool tomoyo_is_select_one(struct tomoyo_io_buffer *head, | |
1232 | const char *data) | |
1233 | { | |
1234 | unsigned int pid; | |
1235 | struct tomoyo_domain_info *domain = NULL; | |
1236 | ||
1237 | if (sscanf(data, "pid=%u", &pid) == 1) { | |
1238 | struct task_struct *p; | |
1fcdc7c5 | 1239 | rcu_read_lock(); |
9590837b KT |
1240 | read_lock(&tasklist_lock); |
1241 | p = find_task_by_vpid(pid); | |
1242 | if (p) | |
1243 | domain = tomoyo_real_domain(p); | |
1244 | read_unlock(&tasklist_lock); | |
1fcdc7c5 | 1245 | rcu_read_unlock(); |
9590837b | 1246 | } else if (!strncmp(data, "domain=", 7)) { |
fdb8ebb7 | 1247 | if (tomoyo_is_domain_def(data + 7)) |
9590837b | 1248 | domain = tomoyo_find_domain(data + 7); |
9590837b KT |
1249 | } else |
1250 | return false; | |
1251 | head->write_var1 = domain; | |
1252 | /* Accessing read_buf is safe because head->io_sem is held. */ | |
1253 | if (!head->read_buf) | |
1254 | return true; /* Do nothing if open(O_WRONLY). */ | |
1255 | head->read_avail = 0; | |
1256 | tomoyo_io_printf(head, "# select %s\n", data); | |
1257 | head->read_single_domain = true; | |
1258 | head->read_eof = !domain; | |
1259 | if (domain) { | |
1260 | struct tomoyo_domain_info *d; | |
1261 | head->read_var1 = NULL; | |
fdb8ebb7 | 1262 | list_for_each_entry_rcu(d, &tomoyo_domain_list, list) { |
9590837b KT |
1263 | if (d == domain) |
1264 | break; | |
1265 | head->read_var1 = &d->list; | |
1266 | } | |
9590837b KT |
1267 | head->read_var2 = NULL; |
1268 | head->read_bit = 0; | |
1269 | head->read_step = 0; | |
1270 | if (domain->is_deleted) | |
1271 | tomoyo_io_printf(head, "# This is a deleted domain.\n"); | |
1272 | } | |
1273 | return true; | |
1274 | } | |
1275 | ||
ccf135f5 TH |
1276 | /** |
1277 | * tomoyo_delete_domain - Delete a domain. | |
1278 | * | |
1279 | * @domainname: The name of domain. | |
1280 | * | |
1281 | * Returns 0. | |
fdb8ebb7 TH |
1282 | * |
1283 | * Caller holds tomoyo_read_lock(). | |
ccf135f5 TH |
1284 | */ |
1285 | static int tomoyo_delete_domain(char *domainname) | |
1286 | { | |
1287 | struct tomoyo_domain_info *domain; | |
1288 | struct tomoyo_path_info name; | |
1289 | ||
1290 | name.name = domainname; | |
1291 | tomoyo_fill_path_info(&name); | |
29282381 TH |
1292 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
1293 | return 0; | |
ccf135f5 | 1294 | /* Is there an active domain? */ |
fdb8ebb7 | 1295 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
ccf135f5 TH |
1296 | /* Never delete tomoyo_kernel_domain */ |
1297 | if (domain == &tomoyo_kernel_domain) | |
1298 | continue; | |
1299 | if (domain->is_deleted || | |
1300 | tomoyo_pathcmp(domain->domainname, &name)) | |
1301 | continue; | |
1302 | domain->is_deleted = true; | |
1303 | break; | |
1304 | } | |
f737d95d | 1305 | mutex_unlock(&tomoyo_policy_lock); |
ccf135f5 TH |
1306 | return 0; |
1307 | } | |
1308 | ||
9590837b KT |
1309 | /** |
1310 | * tomoyo_write_domain_policy - Write domain policy. | |
1311 | * | |
1312 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1313 | * | |
1314 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1315 | * |
1316 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1317 | */ |
1318 | static int tomoyo_write_domain_policy(struct tomoyo_io_buffer *head) | |
1319 | { | |
1320 | char *data = head->write_buf; | |
1321 | struct tomoyo_domain_info *domain = head->write_var1; | |
1322 | bool is_delete = false; | |
1323 | bool is_select = false; | |
9590837b KT |
1324 | unsigned int profile; |
1325 | ||
1326 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE)) | |
1327 | is_delete = true; | |
1328 | else if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_SELECT)) | |
1329 | is_select = true; | |
9590837b KT |
1330 | if (is_select && tomoyo_is_select_one(head, data)) |
1331 | return 0; | |
1332 | /* Don't allow updating policies by non manager programs. */ | |
1333 | if (!tomoyo_is_policy_manager()) | |
1334 | return -EPERM; | |
1335 | if (tomoyo_is_domain_def(data)) { | |
1336 | domain = NULL; | |
1337 | if (is_delete) | |
1338 | tomoyo_delete_domain(data); | |
fdb8ebb7 | 1339 | else if (is_select) |
9590837b | 1340 | domain = tomoyo_find_domain(data); |
fdb8ebb7 | 1341 | else |
9590837b KT |
1342 | domain = tomoyo_find_or_assign_new_domain(data, 0); |
1343 | head->write_var1 = domain; | |
1344 | return 0; | |
1345 | } | |
1346 | if (!domain) | |
1347 | return -EINVAL; | |
1348 | ||
1349 | if (sscanf(data, TOMOYO_KEYWORD_USE_PROFILE "%u", &profile) == 1 | |
1350 | && profile < TOMOYO_MAX_PROFILES) { | |
1351 | if (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded) | |
1352 | domain->profile = (u8) profile; | |
1353 | return 0; | |
1354 | } | |
1355 | if (!strcmp(data, TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ)) { | |
ea13ddba | 1356 | domain->ignore_global_allow_read = !is_delete; |
9590837b KT |
1357 | return 0; |
1358 | } | |
1359 | return tomoyo_write_file_policy(data, domain, is_delete); | |
1360 | } | |
1361 | ||
1362 | /** | |
7ef61233 | 1363 | * tomoyo_print_path_acl - Print a single path ACL entry. |
9590837b KT |
1364 | * |
1365 | * @head: Pointer to "struct tomoyo_io_buffer". | |
7ef61233 | 1366 | * @ptr: Pointer to "struct tomoyo_path_acl". |
9590837b KT |
1367 | * |
1368 | * Returns true on success, false otherwise. | |
1369 | */ | |
7ef61233 TH |
1370 | static bool tomoyo_print_path_acl(struct tomoyo_io_buffer *head, |
1371 | struct tomoyo_path_acl *ptr) | |
9590837b KT |
1372 | { |
1373 | int pos; | |
1374 | u8 bit; | |
9590837b | 1375 | const char *filename; |
937bf613 | 1376 | const u32 perm = ptr->perm | (((u32) ptr->perm_high) << 16); |
9590837b KT |
1377 | |
1378 | filename = ptr->filename->name; | |
7ef61233 | 1379 | for (bit = head->read_bit; bit < TOMOYO_MAX_PATH_OPERATION; bit++) { |
9590837b KT |
1380 | const char *msg; |
1381 | if (!(perm & (1 << bit))) | |
1382 | continue; | |
1383 | /* Print "read/write" instead of "read" and "write". */ | |
7ef61233 TH |
1384 | if ((bit == TOMOYO_TYPE_READ || bit == TOMOYO_TYPE_WRITE) |
1385 | && (perm & (1 << TOMOYO_TYPE_READ_WRITE))) | |
9590837b | 1386 | continue; |
7ef61233 | 1387 | msg = tomoyo_path2keyword(bit); |
9590837b | 1388 | pos = head->read_avail; |
b380de9e | 1389 | if (!tomoyo_io_printf(head, "allow_%s %s\n", msg, filename)) |
9590837b KT |
1390 | goto out; |
1391 | } | |
1392 | head->read_bit = 0; | |
1393 | return true; | |
1394 | out: | |
1395 | head->read_bit = bit; | |
1396 | head->read_avail = pos; | |
1397 | return false; | |
1398 | } | |
1399 | ||
1400 | /** | |
7ef61233 | 1401 | * tomoyo_print_path2_acl - Print a double path ACL entry. |
9590837b KT |
1402 | * |
1403 | * @head: Pointer to "struct tomoyo_io_buffer". | |
7ef61233 | 1404 | * @ptr: Pointer to "struct tomoyo_path2_acl". |
9590837b KT |
1405 | * |
1406 | * Returns true on success, false otherwise. | |
1407 | */ | |
7ef61233 TH |
1408 | static bool tomoyo_print_path2_acl(struct tomoyo_io_buffer *head, |
1409 | struct tomoyo_path2_acl *ptr) | |
9590837b KT |
1410 | { |
1411 | int pos; | |
9590837b KT |
1412 | const char *filename1; |
1413 | const char *filename2; | |
1414 | const u8 perm = ptr->perm; | |
1415 | u8 bit; | |
1416 | ||
1417 | filename1 = ptr->filename1->name; | |
1418 | filename2 = ptr->filename2->name; | |
7ef61233 | 1419 | for (bit = head->read_bit; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) { |
9590837b KT |
1420 | const char *msg; |
1421 | if (!(perm & (1 << bit))) | |
1422 | continue; | |
7ef61233 | 1423 | msg = tomoyo_path22keyword(bit); |
9590837b | 1424 | pos = head->read_avail; |
b380de9e TH |
1425 | if (!tomoyo_io_printf(head, "allow_%s %s %s\n", msg, |
1426 | filename1, filename2)) | |
9590837b KT |
1427 | goto out; |
1428 | } | |
1429 | head->read_bit = 0; | |
1430 | return true; | |
1431 | out: | |
1432 | head->read_bit = bit; | |
1433 | head->read_avail = pos; | |
1434 | return false; | |
1435 | } | |
1436 | ||
1437 | /** | |
1438 | * tomoyo_print_entry - Print an ACL entry. | |
1439 | * | |
1440 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1441 | * @ptr: Pointer to an ACL entry. | |
1442 | * | |
1443 | * Returns true on success, false otherwise. | |
1444 | */ | |
1445 | static bool tomoyo_print_entry(struct tomoyo_io_buffer *head, | |
1446 | struct tomoyo_acl_info *ptr) | |
1447 | { | |
ea13ddba | 1448 | const u8 acl_type = ptr->type; |
9590837b | 1449 | |
7ef61233 TH |
1450 | if (acl_type == TOMOYO_TYPE_PATH_ACL) { |
1451 | struct tomoyo_path_acl *acl | |
1452 | = container_of(ptr, struct tomoyo_path_acl, head); | |
1453 | return tomoyo_print_path_acl(head, acl); | |
9590837b | 1454 | } |
7ef61233 TH |
1455 | if (acl_type == TOMOYO_TYPE_PATH2_ACL) { |
1456 | struct tomoyo_path2_acl *acl | |
1457 | = container_of(ptr, struct tomoyo_path2_acl, head); | |
1458 | return tomoyo_print_path2_acl(head, acl); | |
9590837b KT |
1459 | } |
1460 | BUG(); /* This must not happen. */ | |
1461 | return false; | |
1462 | } | |
1463 | ||
1464 | /** | |
1465 | * tomoyo_read_domain_policy - Read domain policy. | |
1466 | * | |
1467 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1468 | * | |
1469 | * Returns 0. | |
fdb8ebb7 TH |
1470 | * |
1471 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1472 | */ |
1473 | static int tomoyo_read_domain_policy(struct tomoyo_io_buffer *head) | |
1474 | { | |
1475 | struct list_head *dpos; | |
1476 | struct list_head *apos; | |
1477 | bool done = true; | |
1478 | ||
1479 | if (head->read_eof) | |
1480 | return 0; | |
1481 | if (head->read_step == 0) | |
1482 | head->read_step = 1; | |
9590837b KT |
1483 | list_for_each_cookie(dpos, head->read_var1, &tomoyo_domain_list) { |
1484 | struct tomoyo_domain_info *domain; | |
1485 | const char *quota_exceeded = ""; | |
1486 | const char *transition_failed = ""; | |
1487 | const char *ignore_global_allow_read = ""; | |
1488 | domain = list_entry(dpos, struct tomoyo_domain_info, list); | |
1489 | if (head->read_step != 1) | |
1490 | goto acl_loop; | |
1491 | if (domain->is_deleted && !head->read_single_domain) | |
1492 | continue; | |
1493 | /* Print domainname and flags. */ | |
1494 | if (domain->quota_warned) | |
1495 | quota_exceeded = "quota_exceeded\n"; | |
ea13ddba | 1496 | if (domain->transition_failed) |
9590837b | 1497 | transition_failed = "transition_failed\n"; |
ea13ddba | 1498 | if (domain->ignore_global_allow_read) |
9590837b KT |
1499 | ignore_global_allow_read |
1500 | = TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "\n"; | |
7d2948b1 TH |
1501 | done = tomoyo_io_printf(head, "%s\n" TOMOYO_KEYWORD_USE_PROFILE |
1502 | "%u\n%s%s%s\n", | |
1503 | domain->domainname->name, | |
1504 | domain->profile, quota_exceeded, | |
1505 | transition_failed, | |
1506 | ignore_global_allow_read); | |
1507 | if (!done) | |
9590837b | 1508 | break; |
9590837b KT |
1509 | head->read_step = 2; |
1510 | acl_loop: | |
1511 | if (head->read_step == 3) | |
1512 | goto tail_mark; | |
1513 | /* Print ACL entries in the domain. */ | |
9590837b | 1514 | list_for_each_cookie(apos, head->read_var2, |
7d2948b1 | 1515 | &domain->acl_info_list) { |
9590837b KT |
1516 | struct tomoyo_acl_info *ptr |
1517 | = list_entry(apos, struct tomoyo_acl_info, | |
7d2948b1 TH |
1518 | list); |
1519 | done = tomoyo_print_entry(head, ptr); | |
1520 | if (!done) | |
9590837b | 1521 | break; |
9590837b | 1522 | } |
9590837b KT |
1523 | if (!done) |
1524 | break; | |
1525 | head->read_step = 3; | |
1526 | tail_mark: | |
7d2948b1 TH |
1527 | done = tomoyo_io_printf(head, "\n"); |
1528 | if (!done) | |
9590837b | 1529 | break; |
9590837b KT |
1530 | head->read_step = 1; |
1531 | if (head->read_single_domain) | |
1532 | break; | |
1533 | } | |
9590837b KT |
1534 | head->read_eof = done; |
1535 | return 0; | |
1536 | } | |
1537 | ||
1538 | /** | |
1539 | * tomoyo_write_domain_profile - Assign profile for specified domain. | |
1540 | * | |
1541 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1542 | * | |
1543 | * Returns 0 on success, -EINVAL otherwise. | |
1544 | * | |
1545 | * This is equivalent to doing | |
1546 | * | |
1547 | * ( echo "select " $domainname; echo "use_profile " $profile ) | | |
1548 | * /usr/lib/ccs/loadpolicy -d | |
fdb8ebb7 TH |
1549 | * |
1550 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1551 | */ |
1552 | static int tomoyo_write_domain_profile(struct tomoyo_io_buffer *head) | |
1553 | { | |
1554 | char *data = head->write_buf; | |
1555 | char *cp = strchr(data, ' '); | |
1556 | struct tomoyo_domain_info *domain; | |
1557 | unsigned long profile; | |
1558 | ||
1559 | if (!cp) | |
1560 | return -EINVAL; | |
1561 | *cp = '\0'; | |
9590837b | 1562 | domain = tomoyo_find_domain(cp + 1); |
9590837b KT |
1563 | if (strict_strtoul(data, 10, &profile)) |
1564 | return -EINVAL; | |
1565 | if (domain && profile < TOMOYO_MAX_PROFILES | |
1566 | && (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded)) | |
1567 | domain->profile = (u8) profile; | |
1568 | return 0; | |
1569 | } | |
1570 | ||
1571 | /** | |
1572 | * tomoyo_read_domain_profile - Read only domainname and profile. | |
1573 | * | |
1574 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1575 | * | |
1576 | * Returns list of profile number and domainname pairs. | |
1577 | * | |
1578 | * This is equivalent to doing | |
1579 | * | |
1580 | * grep -A 1 '^<kernel>' /sys/kernel/security/tomoyo/domain_policy | | |
1581 | * awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" ) | |
1582 | * domainname = $0; } else if ( $1 == "use_profile" ) { | |
1583 | * print $2 " " domainname; domainname = ""; } } ; ' | |
fdb8ebb7 TH |
1584 | * |
1585 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1586 | */ |
1587 | static int tomoyo_read_domain_profile(struct tomoyo_io_buffer *head) | |
1588 | { | |
1589 | struct list_head *pos; | |
1590 | bool done = true; | |
1591 | ||
1592 | if (head->read_eof) | |
1593 | return 0; | |
9590837b KT |
1594 | list_for_each_cookie(pos, head->read_var1, &tomoyo_domain_list) { |
1595 | struct tomoyo_domain_info *domain; | |
1596 | domain = list_entry(pos, struct tomoyo_domain_info, list); | |
1597 | if (domain->is_deleted) | |
1598 | continue; | |
7d2948b1 TH |
1599 | done = tomoyo_io_printf(head, "%u %s\n", domain->profile, |
1600 | domain->domainname->name); | |
1601 | if (!done) | |
9590837b | 1602 | break; |
9590837b | 1603 | } |
9590837b KT |
1604 | head->read_eof = done; |
1605 | return 0; | |
1606 | } | |
1607 | ||
1608 | /** | |
1609 | * tomoyo_write_pid: Specify PID to obtain domainname. | |
1610 | * | |
1611 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1612 | * | |
1613 | * Returns 0. | |
1614 | */ | |
1615 | static int tomoyo_write_pid(struct tomoyo_io_buffer *head) | |
1616 | { | |
1617 | unsigned long pid; | |
1618 | /* No error check. */ | |
1619 | strict_strtoul(head->write_buf, 10, &pid); | |
1620 | head->read_step = (int) pid; | |
1621 | head->read_eof = false; | |
1622 | return 0; | |
1623 | } | |
1624 | ||
1625 | /** | |
1626 | * tomoyo_read_pid - Get domainname of the specified PID. | |
1627 | * | |
1628 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1629 | * | |
1630 | * Returns the domainname which the specified PID is in on success, | |
1631 | * empty string otherwise. | |
1632 | * The PID is specified by tomoyo_write_pid() so that the user can obtain | |
1633 | * using read()/write() interface rather than sysctl() interface. | |
1634 | */ | |
1635 | static int tomoyo_read_pid(struct tomoyo_io_buffer *head) | |
1636 | { | |
1637 | if (head->read_avail == 0 && !head->read_eof) { | |
1638 | const int pid = head->read_step; | |
1639 | struct task_struct *p; | |
1640 | struct tomoyo_domain_info *domain = NULL; | |
1fcdc7c5 | 1641 | rcu_read_lock(); |
9590837b KT |
1642 | read_lock(&tasklist_lock); |
1643 | p = find_task_by_vpid(pid); | |
1644 | if (p) | |
1645 | domain = tomoyo_real_domain(p); | |
1646 | read_unlock(&tasklist_lock); | |
1fcdc7c5 | 1647 | rcu_read_unlock(); |
9590837b KT |
1648 | if (domain) |
1649 | tomoyo_io_printf(head, "%d %u %s", pid, domain->profile, | |
1650 | domain->domainname->name); | |
1651 | head->read_eof = true; | |
1652 | } | |
1653 | return 0; | |
1654 | } | |
1655 | ||
1656 | /** | |
1657 | * tomoyo_write_exception_policy - Write exception policy. | |
1658 | * | |
1659 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1660 | * | |
1661 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1662 | * |
1663 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1664 | */ |
1665 | static int tomoyo_write_exception_policy(struct tomoyo_io_buffer *head) | |
1666 | { | |
1667 | char *data = head->write_buf; | |
1668 | bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE); | |
1669 | ||
1670 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_KEEP_DOMAIN)) | |
1671 | return tomoyo_write_domain_keeper_policy(data, false, | |
1672 | is_delete); | |
1673 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NO_KEEP_DOMAIN)) | |
1674 | return tomoyo_write_domain_keeper_policy(data, true, is_delete); | |
1675 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_INITIALIZE_DOMAIN)) | |
1676 | return tomoyo_write_domain_initializer_policy(data, false, | |
1677 | is_delete); | |
1678 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN)) | |
1679 | return tomoyo_write_domain_initializer_policy(data, true, | |
1680 | is_delete); | |
1681 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALIAS)) | |
1682 | return tomoyo_write_alias_policy(data, is_delete); | |
1683 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALLOW_READ)) | |
1684 | return tomoyo_write_globally_readable_policy(data, is_delete); | |
1685 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_FILE_PATTERN)) | |
1686 | return tomoyo_write_pattern_policy(data, is_delete); | |
1687 | if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DENY_REWRITE)) | |
1688 | return tomoyo_write_no_rewrite_policy(data, is_delete); | |
1689 | return -EINVAL; | |
1690 | } | |
1691 | ||
1692 | /** | |
1693 | * tomoyo_read_exception_policy - Read exception policy. | |
1694 | * | |
1695 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1696 | * | |
1697 | * Returns 0 on success, -EINVAL otherwise. | |
fdb8ebb7 TH |
1698 | * |
1699 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1700 | */ |
1701 | static int tomoyo_read_exception_policy(struct tomoyo_io_buffer *head) | |
1702 | { | |
1703 | if (!head->read_eof) { | |
1704 | switch (head->read_step) { | |
1705 | case 0: | |
1706 | head->read_var2 = NULL; | |
1707 | head->read_step = 1; | |
1708 | case 1: | |
1709 | if (!tomoyo_read_domain_keeper_policy(head)) | |
1710 | break; | |
1711 | head->read_var2 = NULL; | |
1712 | head->read_step = 2; | |
1713 | case 2: | |
1714 | if (!tomoyo_read_globally_readable_policy(head)) | |
1715 | break; | |
1716 | head->read_var2 = NULL; | |
1717 | head->read_step = 3; | |
1718 | case 3: | |
1719 | head->read_var2 = NULL; | |
1720 | head->read_step = 4; | |
1721 | case 4: | |
1722 | if (!tomoyo_read_domain_initializer_policy(head)) | |
1723 | break; | |
1724 | head->read_var2 = NULL; | |
1725 | head->read_step = 5; | |
1726 | case 5: | |
1727 | if (!tomoyo_read_alias_policy(head)) | |
1728 | break; | |
1729 | head->read_var2 = NULL; | |
1730 | head->read_step = 6; | |
1731 | case 6: | |
1732 | head->read_var2 = NULL; | |
1733 | head->read_step = 7; | |
1734 | case 7: | |
1735 | if (!tomoyo_read_file_pattern(head)) | |
1736 | break; | |
1737 | head->read_var2 = NULL; | |
1738 | head->read_step = 8; | |
1739 | case 8: | |
1740 | if (!tomoyo_read_no_rewrite_policy(head)) | |
1741 | break; | |
1742 | head->read_var2 = NULL; | |
1743 | head->read_step = 9; | |
1744 | case 9: | |
1745 | head->read_eof = true; | |
1746 | break; | |
1747 | default: | |
1748 | return -EINVAL; | |
1749 | } | |
1750 | } | |
1751 | return 0; | |
1752 | } | |
1753 | ||
1754 | /* path to policy loader */ | |
1755 | static const char *tomoyo_loader = "/sbin/tomoyo-init"; | |
1756 | ||
1757 | /** | |
1758 | * tomoyo_policy_loader_exists - Check whether /sbin/tomoyo-init exists. | |
1759 | * | |
1760 | * Returns true if /sbin/tomoyo-init exists, false otherwise. | |
1761 | */ | |
1762 | static bool tomoyo_policy_loader_exists(void) | |
1763 | { | |
1764 | /* | |
1765 | * Don't activate MAC if the policy loader doesn't exist. | |
1766 | * If the initrd includes /sbin/init but real-root-dev has not | |
1767 | * mounted on / yet, activating MAC will block the system since | |
1768 | * policies are not loaded yet. | |
1769 | * Thus, let do_execve() call this function everytime. | |
1770 | */ | |
e24977d4 | 1771 | struct path path; |
9590837b | 1772 | |
e24977d4 | 1773 | if (kern_path(tomoyo_loader, LOOKUP_FOLLOW, &path)) { |
9590837b KT |
1774 | printk(KERN_INFO "Not activating Mandatory Access Control now " |
1775 | "since %s doesn't exist.\n", tomoyo_loader); | |
1776 | return false; | |
1777 | } | |
e24977d4 | 1778 | path_put(&path); |
9590837b KT |
1779 | return true; |
1780 | } | |
1781 | ||
1782 | /** | |
1783 | * tomoyo_load_policy - Run external policy loader to load policy. | |
1784 | * | |
1785 | * @filename: The program about to start. | |
1786 | * | |
1787 | * This function checks whether @filename is /sbin/init , and if so | |
1788 | * invoke /sbin/tomoyo-init and wait for the termination of /sbin/tomoyo-init | |
1789 | * and then continues invocation of /sbin/init. | |
1790 | * /sbin/tomoyo-init reads policy files in /etc/tomoyo/ directory and | |
1791 | * writes to /sys/kernel/security/tomoyo/ interfaces. | |
1792 | * | |
1793 | * Returns nothing. | |
1794 | */ | |
1795 | void tomoyo_load_policy(const char *filename) | |
1796 | { | |
1797 | char *argv[2]; | |
1798 | char *envp[3]; | |
1799 | ||
1800 | if (tomoyo_policy_loaded) | |
1801 | return; | |
1802 | /* | |
1803 | * Check filename is /sbin/init or /sbin/tomoyo-start. | |
1804 | * /sbin/tomoyo-start is a dummy filename in case where /sbin/init can't | |
1805 | * be passed. | |
1806 | * You can create /sbin/tomoyo-start by | |
1807 | * "ln -s /bin/true /sbin/tomoyo-start". | |
1808 | */ | |
1809 | if (strcmp(filename, "/sbin/init") && | |
1810 | strcmp(filename, "/sbin/tomoyo-start")) | |
1811 | return; | |
1812 | if (!tomoyo_policy_loader_exists()) | |
1813 | return; | |
1814 | ||
1815 | printk(KERN_INFO "Calling %s to load policy. Please wait.\n", | |
1816 | tomoyo_loader); | |
1817 | argv[0] = (char *) tomoyo_loader; | |
1818 | argv[1] = NULL; | |
1819 | envp[0] = "HOME=/"; | |
1820 | envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
1821 | envp[2] = NULL; | |
1822 | call_usermodehelper(argv[0], argv, envp, 1); | |
1823 | ||
39826a1e | 1824 | printk(KERN_INFO "TOMOYO: 2.2.0 2009/04/01\n"); |
9590837b KT |
1825 | printk(KERN_INFO "Mandatory Access Control activated.\n"); |
1826 | tomoyo_policy_loaded = true; | |
1827 | { /* Check all profiles currently assigned to domains are defined. */ | |
1828 | struct tomoyo_domain_info *domain; | |
fdb8ebb7 | 1829 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
9590837b KT |
1830 | const u8 profile = domain->profile; |
1831 | if (tomoyo_profile_ptr[profile]) | |
1832 | continue; | |
1833 | panic("Profile %u (used by '%s') not defined.\n", | |
1834 | profile, domain->domainname->name); | |
1835 | } | |
9590837b KT |
1836 | } |
1837 | } | |
1838 | ||
1839 | /** | |
1840 | * tomoyo_read_version: Get version. | |
1841 | * | |
1842 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1843 | * | |
1844 | * Returns version information. | |
1845 | */ | |
1846 | static int tomoyo_read_version(struct tomoyo_io_buffer *head) | |
1847 | { | |
1848 | if (!head->read_eof) { | |
39826a1e | 1849 | tomoyo_io_printf(head, "2.2.0"); |
9590837b KT |
1850 | head->read_eof = true; |
1851 | } | |
1852 | return 0; | |
1853 | } | |
1854 | ||
1855 | /** | |
1856 | * tomoyo_read_self_domain - Get the current process's domainname. | |
1857 | * | |
1858 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1859 | * | |
1860 | * Returns the current process's domainname. | |
1861 | */ | |
1862 | static int tomoyo_read_self_domain(struct tomoyo_io_buffer *head) | |
1863 | { | |
1864 | if (!head->read_eof) { | |
1865 | /* | |
1866 | * tomoyo_domain()->domainname != NULL | |
1867 | * because every process belongs to a domain and | |
1868 | * the domain's name cannot be NULL. | |
1869 | */ | |
1870 | tomoyo_io_printf(head, "%s", tomoyo_domain()->domainname->name); | |
1871 | head->read_eof = true; | |
1872 | } | |
1873 | return 0; | |
1874 | } | |
1875 | ||
1876 | /** | |
1877 | * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface. | |
1878 | * | |
1879 | * @type: Type of interface. | |
1880 | * @file: Pointer to "struct file". | |
1881 | * | |
1882 | * Associates policy handler and returns 0 on success, -ENOMEM otherwise. | |
fdb8ebb7 TH |
1883 | * |
1884 | * Caller acquires tomoyo_read_lock(). | |
9590837b KT |
1885 | */ |
1886 | static int tomoyo_open_control(const u8 type, struct file *file) | |
1887 | { | |
4e5d6f7e | 1888 | struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS); |
9590837b KT |
1889 | |
1890 | if (!head) | |
1891 | return -ENOMEM; | |
1892 | mutex_init(&head->io_sem); | |
1893 | switch (type) { | |
1894 | case TOMOYO_DOMAINPOLICY: | |
1895 | /* /sys/kernel/security/tomoyo/domain_policy */ | |
1896 | head->write = tomoyo_write_domain_policy; | |
1897 | head->read = tomoyo_read_domain_policy; | |
1898 | break; | |
1899 | case TOMOYO_EXCEPTIONPOLICY: | |
1900 | /* /sys/kernel/security/tomoyo/exception_policy */ | |
1901 | head->write = tomoyo_write_exception_policy; | |
1902 | head->read = tomoyo_read_exception_policy; | |
1903 | break; | |
1904 | case TOMOYO_SELFDOMAIN: | |
1905 | /* /sys/kernel/security/tomoyo/self_domain */ | |
1906 | head->read = tomoyo_read_self_domain; | |
1907 | break; | |
1908 | case TOMOYO_DOMAIN_STATUS: | |
1909 | /* /sys/kernel/security/tomoyo/.domain_status */ | |
1910 | head->write = tomoyo_write_domain_profile; | |
1911 | head->read = tomoyo_read_domain_profile; | |
1912 | break; | |
1913 | case TOMOYO_PROCESS_STATUS: | |
1914 | /* /sys/kernel/security/tomoyo/.process_status */ | |
1915 | head->write = tomoyo_write_pid; | |
1916 | head->read = tomoyo_read_pid; | |
1917 | break; | |
1918 | case TOMOYO_VERSION: | |
1919 | /* /sys/kernel/security/tomoyo/version */ | |
1920 | head->read = tomoyo_read_version; | |
1921 | head->readbuf_size = 128; | |
1922 | break; | |
1923 | case TOMOYO_MEMINFO: | |
1924 | /* /sys/kernel/security/tomoyo/meminfo */ | |
1925 | head->write = tomoyo_write_memory_quota; | |
1926 | head->read = tomoyo_read_memory_counter; | |
1927 | head->readbuf_size = 512; | |
1928 | break; | |
1929 | case TOMOYO_PROFILE: | |
1930 | /* /sys/kernel/security/tomoyo/profile */ | |
1931 | head->write = tomoyo_write_profile; | |
1932 | head->read = tomoyo_read_profile; | |
1933 | break; | |
1934 | case TOMOYO_MANAGER: | |
1935 | /* /sys/kernel/security/tomoyo/manager */ | |
1936 | head->write = tomoyo_write_manager_policy; | |
1937 | head->read = tomoyo_read_manager_policy; | |
1938 | break; | |
1939 | } | |
1940 | if (!(file->f_mode & FMODE_READ)) { | |
1941 | /* | |
1942 | * No need to allocate read_buf since it is not opened | |
1943 | * for reading. | |
1944 | */ | |
1945 | head->read = NULL; | |
1946 | } else { | |
1947 | if (!head->readbuf_size) | |
1948 | head->readbuf_size = 4096 * 2; | |
4e5d6f7e | 1949 | head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS); |
9590837b | 1950 | if (!head->read_buf) { |
8e2d39a1 | 1951 | kfree(head); |
9590837b KT |
1952 | return -ENOMEM; |
1953 | } | |
1954 | } | |
1955 | if (!(file->f_mode & FMODE_WRITE)) { | |
1956 | /* | |
1957 | * No need to allocate write_buf since it is not opened | |
1958 | * for writing. | |
1959 | */ | |
1960 | head->write = NULL; | |
1961 | } else if (head->write) { | |
1962 | head->writebuf_size = 4096 * 2; | |
4e5d6f7e | 1963 | head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS); |
9590837b | 1964 | if (!head->write_buf) { |
8e2d39a1 TH |
1965 | kfree(head->read_buf); |
1966 | kfree(head); | |
9590837b KT |
1967 | return -ENOMEM; |
1968 | } | |
1969 | } | |
fdb8ebb7 | 1970 | head->reader_idx = tomoyo_read_lock(); |
9590837b KT |
1971 | file->private_data = head; |
1972 | /* | |
1973 | * Call the handler now if the file is | |
1974 | * /sys/kernel/security/tomoyo/self_domain | |
1975 | * so that the user can use | |
1976 | * cat < /sys/kernel/security/tomoyo/self_domain" | |
1977 | * to know the current process's domainname. | |
1978 | */ | |
1979 | if (type == TOMOYO_SELFDOMAIN) | |
1980 | tomoyo_read_control(file, NULL, 0); | |
1981 | return 0; | |
1982 | } | |
1983 | ||
1984 | /** | |
1985 | * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface. | |
1986 | * | |
1987 | * @file: Pointer to "struct file". | |
1988 | * @buffer: Poiner to buffer to write to. | |
1989 | * @buffer_len: Size of @buffer. | |
1990 | * | |
1991 | * Returns bytes read on success, negative value otherwise. | |
fdb8ebb7 TH |
1992 | * |
1993 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
1994 | */ |
1995 | static int tomoyo_read_control(struct file *file, char __user *buffer, | |
1996 | const int buffer_len) | |
1997 | { | |
1998 | int len = 0; | |
1999 | struct tomoyo_io_buffer *head = file->private_data; | |
2000 | char *cp; | |
2001 | ||
2002 | if (!head->read) | |
2003 | return -ENOSYS; | |
2004 | if (mutex_lock_interruptible(&head->io_sem)) | |
2005 | return -EINTR; | |
2006 | /* Call the policy handler. */ | |
2007 | len = head->read(head); | |
2008 | if (len < 0) | |
2009 | goto out; | |
2010 | /* Write to buffer. */ | |
2011 | len = head->read_avail; | |
2012 | if (len > buffer_len) | |
2013 | len = buffer_len; | |
2014 | if (!len) | |
2015 | goto out; | |
2016 | /* head->read_buf changes by some functions. */ | |
2017 | cp = head->read_buf; | |
2018 | if (copy_to_user(buffer, cp, len)) { | |
2019 | len = -EFAULT; | |
2020 | goto out; | |
2021 | } | |
2022 | head->read_avail -= len; | |
2023 | memmove(cp, cp + len, head->read_avail); | |
2024 | out: | |
2025 | mutex_unlock(&head->io_sem); | |
2026 | return len; | |
2027 | } | |
2028 | ||
2029 | /** | |
2030 | * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface. | |
2031 | * | |
2032 | * @file: Pointer to "struct file". | |
2033 | * @buffer: Pointer to buffer to read from. | |
2034 | * @buffer_len: Size of @buffer. | |
2035 | * | |
2036 | * Returns @buffer_len on success, negative value otherwise. | |
fdb8ebb7 TH |
2037 | * |
2038 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
2039 | */ |
2040 | static int tomoyo_write_control(struct file *file, const char __user *buffer, | |
2041 | const int buffer_len) | |
2042 | { | |
2043 | struct tomoyo_io_buffer *head = file->private_data; | |
2044 | int error = buffer_len; | |
2045 | int avail_len = buffer_len; | |
2046 | char *cp0 = head->write_buf; | |
2047 | ||
2048 | if (!head->write) | |
2049 | return -ENOSYS; | |
2050 | if (!access_ok(VERIFY_READ, buffer, buffer_len)) | |
2051 | return -EFAULT; | |
2052 | /* Don't allow updating policies by non manager programs. */ | |
2053 | if (head->write != tomoyo_write_pid && | |
2054 | head->write != tomoyo_write_domain_policy && | |
2055 | !tomoyo_is_policy_manager()) | |
2056 | return -EPERM; | |
2057 | if (mutex_lock_interruptible(&head->io_sem)) | |
2058 | return -EINTR; | |
2059 | /* Read a line and dispatch it to the policy handler. */ | |
2060 | while (avail_len > 0) { | |
2061 | char c; | |
2062 | if (head->write_avail >= head->writebuf_size - 1) { | |
2063 | error = -ENOMEM; | |
2064 | break; | |
2065 | } else if (get_user(c, buffer)) { | |
2066 | error = -EFAULT; | |
2067 | break; | |
2068 | } | |
2069 | buffer++; | |
2070 | avail_len--; | |
2071 | cp0[head->write_avail++] = c; | |
2072 | if (c != '\n') | |
2073 | continue; | |
2074 | cp0[head->write_avail - 1] = '\0'; | |
2075 | head->write_avail = 0; | |
2076 | tomoyo_normalize_line(cp0); | |
2077 | head->write(head); | |
2078 | } | |
2079 | mutex_unlock(&head->io_sem); | |
2080 | return error; | |
2081 | } | |
2082 | ||
2083 | /** | |
2084 | * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface. | |
2085 | * | |
2086 | * @file: Pointer to "struct file". | |
2087 | * | |
2088 | * Releases memory and returns 0. | |
fdb8ebb7 TH |
2089 | * |
2090 | * Caller looses tomoyo_read_lock(). | |
9590837b KT |
2091 | */ |
2092 | static int tomoyo_close_control(struct file *file) | |
2093 | { | |
2094 | struct tomoyo_io_buffer *head = file->private_data; | |
847b173e | 2095 | const bool is_write = !!head->write_buf; |
9590837b | 2096 | |
fdb8ebb7 | 2097 | tomoyo_read_unlock(head->reader_idx); |
9590837b | 2098 | /* Release memory used for policy I/O. */ |
8e2d39a1 | 2099 | kfree(head->read_buf); |
9590837b | 2100 | head->read_buf = NULL; |
8e2d39a1 | 2101 | kfree(head->write_buf); |
9590837b | 2102 | head->write_buf = NULL; |
8e2d39a1 | 2103 | kfree(head); |
9590837b KT |
2104 | head = NULL; |
2105 | file->private_data = NULL; | |
847b173e TH |
2106 | if (is_write) |
2107 | tomoyo_run_gc(); | |
9590837b KT |
2108 | return 0; |
2109 | } | |
2110 | ||
9590837b KT |
2111 | /** |
2112 | * tomoyo_open - open() for /sys/kernel/security/tomoyo/ interface. | |
2113 | * | |
2114 | * @inode: Pointer to "struct inode". | |
2115 | * @file: Pointer to "struct file". | |
2116 | * | |
2117 | * Returns 0 on success, negative value otherwise. | |
2118 | */ | |
2119 | static int tomoyo_open(struct inode *inode, struct file *file) | |
2120 | { | |
2121 | const int key = ((u8 *) file->f_path.dentry->d_inode->i_private) | |
2122 | - ((u8 *) NULL); | |
2123 | return tomoyo_open_control(key, file); | |
2124 | } | |
2125 | ||
2126 | /** | |
2127 | * tomoyo_release - close() for /sys/kernel/security/tomoyo/ interface. | |
2128 | * | |
2129 | * @inode: Pointer to "struct inode". | |
2130 | * @file: Pointer to "struct file". | |
2131 | * | |
2132 | * Returns 0 on success, negative value otherwise. | |
2133 | */ | |
2134 | static int tomoyo_release(struct inode *inode, struct file *file) | |
2135 | { | |
2136 | return tomoyo_close_control(file); | |
2137 | } | |
2138 | ||
2139 | /** | |
2140 | * tomoyo_read - read() for /sys/kernel/security/tomoyo/ interface. | |
2141 | * | |
2142 | * @file: Pointer to "struct file". | |
2143 | * @buf: Pointer to buffer. | |
2144 | * @count: Size of @buf. | |
2145 | * @ppos: Unused. | |
2146 | * | |
2147 | * Returns bytes read on success, negative value otherwise. | |
2148 | */ | |
2149 | static ssize_t tomoyo_read(struct file *file, char __user *buf, size_t count, | |
2150 | loff_t *ppos) | |
2151 | { | |
2152 | return tomoyo_read_control(file, buf, count); | |
2153 | } | |
2154 | ||
2155 | /** | |
2156 | * tomoyo_write - write() for /sys/kernel/security/tomoyo/ interface. | |
2157 | * | |
2158 | * @file: Pointer to "struct file". | |
2159 | * @buf: Pointer to buffer. | |
2160 | * @count: Size of @buf. | |
2161 | * @ppos: Unused. | |
2162 | * | |
2163 | * Returns @count on success, negative value otherwise. | |
2164 | */ | |
2165 | static ssize_t tomoyo_write(struct file *file, const char __user *buf, | |
2166 | size_t count, loff_t *ppos) | |
2167 | { | |
2168 | return tomoyo_write_control(file, buf, count); | |
2169 | } | |
2170 | ||
c3fa109a TH |
2171 | /* |
2172 | * tomoyo_operations is a "struct file_operations" which is used for handling | |
2173 | * /sys/kernel/security/tomoyo/ interface. | |
2174 | * | |
2175 | * Some files under /sys/kernel/security/tomoyo/ directory accept open(O_RDWR). | |
2176 | * See tomoyo_io_buffer for internals. | |
2177 | */ | |
9590837b KT |
2178 | static const struct file_operations tomoyo_operations = { |
2179 | .open = tomoyo_open, | |
2180 | .release = tomoyo_release, | |
2181 | .read = tomoyo_read, | |
2182 | .write = tomoyo_write, | |
2183 | }; | |
2184 | ||
2185 | /** | |
2186 | * tomoyo_create_entry - Create interface files under /sys/kernel/security/tomoyo/ directory. | |
2187 | * | |
2188 | * @name: The name of the interface file. | |
2189 | * @mode: The permission of the interface file. | |
2190 | * @parent: The parent directory. | |
2191 | * @key: Type of interface. | |
2192 | * | |
2193 | * Returns nothing. | |
2194 | */ | |
2195 | static void __init tomoyo_create_entry(const char *name, const mode_t mode, | |
2196 | struct dentry *parent, const u8 key) | |
2197 | { | |
2198 | securityfs_create_file(name, mode, parent, ((u8 *) NULL) + key, | |
2199 | &tomoyo_operations); | |
2200 | } | |
2201 | ||
2202 | /** | |
2203 | * tomoyo_initerface_init - Initialize /sys/kernel/security/tomoyo/ interface. | |
2204 | * | |
2205 | * Returns 0. | |
2206 | */ | |
2207 | static int __init tomoyo_initerface_init(void) | |
2208 | { | |
2209 | struct dentry *tomoyo_dir; | |
2210 | ||
e5a3b95f TH |
2211 | /* Don't create securityfs entries unless registered. */ |
2212 | if (current_cred()->security != &tomoyo_kernel_domain) | |
2213 | return 0; | |
2214 | ||
9590837b KT |
2215 | tomoyo_dir = securityfs_create_dir("tomoyo", NULL); |
2216 | tomoyo_create_entry("domain_policy", 0600, tomoyo_dir, | |
2217 | TOMOYO_DOMAINPOLICY); | |
2218 | tomoyo_create_entry("exception_policy", 0600, tomoyo_dir, | |
2219 | TOMOYO_EXCEPTIONPOLICY); | |
2220 | tomoyo_create_entry("self_domain", 0400, tomoyo_dir, | |
2221 | TOMOYO_SELFDOMAIN); | |
2222 | tomoyo_create_entry(".domain_status", 0600, tomoyo_dir, | |
2223 | TOMOYO_DOMAIN_STATUS); | |
2224 | tomoyo_create_entry(".process_status", 0600, tomoyo_dir, | |
2225 | TOMOYO_PROCESS_STATUS); | |
2226 | tomoyo_create_entry("meminfo", 0600, tomoyo_dir, | |
2227 | TOMOYO_MEMINFO); | |
2228 | tomoyo_create_entry("profile", 0600, tomoyo_dir, | |
2229 | TOMOYO_PROFILE); | |
2230 | tomoyo_create_entry("manager", 0600, tomoyo_dir, | |
2231 | TOMOYO_MANAGER); | |
2232 | tomoyo_create_entry("version", 0400, tomoyo_dir, | |
2233 | TOMOYO_VERSION); | |
2234 | return 0; | |
2235 | } | |
2236 | ||
2237 | fs_initcall(tomoyo_initerface_init); |