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1 | /* |
2 | * security/tomoyo/common.c |
3 | * |
4 | * Copyright (C) 2005-2011 NTT DATA CORPORATION |
5 | */ |
6 | |
7 | #include <linux/uaccess.h> |
8 | #include <linux/slab.h> |
9 | #include <linux/security.h> |
10 | #include "common.h" |
11 | |
12 | /* String table for operation mode. */ |
13 | const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = { |
14 | [TOMOYO_CONFIG_DISABLED] = "disabled", |
15 | [TOMOYO_CONFIG_LEARNING] = "learning", |
16 | [TOMOYO_CONFIG_PERMISSIVE] = "permissive", |
17 | [TOMOYO_CONFIG_ENFORCING] = "enforcing" |
18 | }; |
19 | |
20 | /* String table for /sys/kernel/security/tomoyo/profile */ |
21 | const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX |
22 | + TOMOYO_MAX_MAC_CATEGORY_INDEX] = { |
23 | /* CONFIG::file group */ |
24 | [TOMOYO_MAC_FILE_EXECUTE] = "execute", |
25 | [TOMOYO_MAC_FILE_OPEN] = "open", |
26 | [TOMOYO_MAC_FILE_CREATE] = "create", |
27 | [TOMOYO_MAC_FILE_UNLINK] = "unlink", |
28 | [TOMOYO_MAC_FILE_GETATTR] = "getattr", |
29 | [TOMOYO_MAC_FILE_MKDIR] = "mkdir", |
30 | [TOMOYO_MAC_FILE_RMDIR] = "rmdir", |
31 | [TOMOYO_MAC_FILE_MKFIFO] = "mkfifo", |
32 | [TOMOYO_MAC_FILE_MKSOCK] = "mksock", |
33 | [TOMOYO_MAC_FILE_TRUNCATE] = "truncate", |
34 | [TOMOYO_MAC_FILE_SYMLINK] = "symlink", |
35 | [TOMOYO_MAC_FILE_MKBLOCK] = "mkblock", |
36 | [TOMOYO_MAC_FILE_MKCHAR] = "mkchar", |
37 | [TOMOYO_MAC_FILE_LINK] = "link", |
38 | [TOMOYO_MAC_FILE_RENAME] = "rename", |
39 | [TOMOYO_MAC_FILE_CHMOD] = "chmod", |
40 | [TOMOYO_MAC_FILE_CHOWN] = "chown", |
41 | [TOMOYO_MAC_FILE_CHGRP] = "chgrp", |
42 | [TOMOYO_MAC_FILE_IOCTL] = "ioctl", |
43 | [TOMOYO_MAC_FILE_CHROOT] = "chroot", |
44 | [TOMOYO_MAC_FILE_MOUNT] = "mount", |
45 | [TOMOYO_MAC_FILE_UMOUNT] = "unmount", |
46 | [TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root", |
47 | /* CONFIG::network group */ |
48 | [TOMOYO_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind", |
49 | [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen", |
50 | [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect", |
51 | [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind", |
52 | [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send", |
53 | [TOMOYO_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind", |
54 | [TOMOYO_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send", |
55 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind", |
56 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen", |
57 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect", |
58 | [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind", |
59 | [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send", |
60 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind", |
61 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen", |
62 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect", |
63 | /* CONFIG::misc group */ |
64 | [TOMOYO_MAC_ENVIRON] = "env", |
65 | /* CONFIG group */ |
66 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file", |
67 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_NETWORK] = "network", |
68 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_MISC] = "misc", |
69 | }; |
70 | |
71 | /* String table for conditions. */ |
72 | const char * const tomoyo_condition_keyword[TOMOYO_MAX_CONDITION_KEYWORD] = { |
73 | [TOMOYO_TASK_UID] = "task.uid", |
74 | [TOMOYO_TASK_EUID] = "task.euid", |
75 | [TOMOYO_TASK_SUID] = "task.suid", |
76 | [TOMOYO_TASK_FSUID] = "task.fsuid", |
77 | [TOMOYO_TASK_GID] = "task.gid", |
78 | [TOMOYO_TASK_EGID] = "task.egid", |
79 | [TOMOYO_TASK_SGID] = "task.sgid", |
80 | [TOMOYO_TASK_FSGID] = "task.fsgid", |
81 | [TOMOYO_TASK_PID] = "task.pid", |
82 | [TOMOYO_TASK_PPID] = "task.ppid", |
83 | [TOMOYO_EXEC_ARGC] = "exec.argc", |
84 | [TOMOYO_EXEC_ENVC] = "exec.envc", |
85 | [TOMOYO_TYPE_IS_SOCKET] = "socket", |
86 | [TOMOYO_TYPE_IS_SYMLINK] = "symlink", |
87 | [TOMOYO_TYPE_IS_FILE] = "file", |
88 | [TOMOYO_TYPE_IS_BLOCK_DEV] = "block", |
89 | [TOMOYO_TYPE_IS_DIRECTORY] = "directory", |
90 | [TOMOYO_TYPE_IS_CHAR_DEV] = "char", |
91 | [TOMOYO_TYPE_IS_FIFO] = "fifo", |
92 | [TOMOYO_MODE_SETUID] = "setuid", |
93 | [TOMOYO_MODE_SETGID] = "setgid", |
94 | [TOMOYO_MODE_STICKY] = "sticky", |
95 | [TOMOYO_MODE_OWNER_READ] = "owner_read", |
96 | [TOMOYO_MODE_OWNER_WRITE] = "owner_write", |
97 | [TOMOYO_MODE_OWNER_EXECUTE] = "owner_execute", |
98 | [TOMOYO_MODE_GROUP_READ] = "group_read", |
99 | [TOMOYO_MODE_GROUP_WRITE] = "group_write", |
100 | [TOMOYO_MODE_GROUP_EXECUTE] = "group_execute", |
101 | [TOMOYO_MODE_OTHERS_READ] = "others_read", |
102 | [TOMOYO_MODE_OTHERS_WRITE] = "others_write", |
103 | [TOMOYO_MODE_OTHERS_EXECUTE] = "others_execute", |
104 | [TOMOYO_EXEC_REALPATH] = "exec.realpath", |
105 | [TOMOYO_SYMLINK_TARGET] = "symlink.target", |
106 | [TOMOYO_PATH1_UID] = "path1.uid", |
107 | [TOMOYO_PATH1_GID] = "path1.gid", |
108 | [TOMOYO_PATH1_INO] = "path1.ino", |
109 | [TOMOYO_PATH1_MAJOR] = "path1.major", |
110 | [TOMOYO_PATH1_MINOR] = "path1.minor", |
111 | [TOMOYO_PATH1_PERM] = "path1.perm", |
112 | [TOMOYO_PATH1_TYPE] = "path1.type", |
113 | [TOMOYO_PATH1_DEV_MAJOR] = "path1.dev_major", |
114 | [TOMOYO_PATH1_DEV_MINOR] = "path1.dev_minor", |
115 | [TOMOYO_PATH2_UID] = "path2.uid", |
116 | [TOMOYO_PATH2_GID] = "path2.gid", |
117 | [TOMOYO_PATH2_INO] = "path2.ino", |
118 | [TOMOYO_PATH2_MAJOR] = "path2.major", |
119 | [TOMOYO_PATH2_MINOR] = "path2.minor", |
120 | [TOMOYO_PATH2_PERM] = "path2.perm", |
121 | [TOMOYO_PATH2_TYPE] = "path2.type", |
122 | [TOMOYO_PATH2_DEV_MAJOR] = "path2.dev_major", |
123 | [TOMOYO_PATH2_DEV_MINOR] = "path2.dev_minor", |
124 | [TOMOYO_PATH1_PARENT_UID] = "path1.parent.uid", |
125 | [TOMOYO_PATH1_PARENT_GID] = "path1.parent.gid", |
126 | [TOMOYO_PATH1_PARENT_INO] = "path1.parent.ino", |
127 | [TOMOYO_PATH1_PARENT_PERM] = "path1.parent.perm", |
128 | [TOMOYO_PATH2_PARENT_UID] = "path2.parent.uid", |
129 | [TOMOYO_PATH2_PARENT_GID] = "path2.parent.gid", |
130 | [TOMOYO_PATH2_PARENT_INO] = "path2.parent.ino", |
131 | [TOMOYO_PATH2_PARENT_PERM] = "path2.parent.perm", |
132 | }; |
133 | |
134 | /* String table for PREFERENCE keyword. */ |
135 | static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = { |
136 | [TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log", |
137 | [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry", |
138 | }; |
139 | |
140 | /* String table for path operation. */ |
141 | const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = { |
142 | [TOMOYO_TYPE_EXECUTE] = "execute", |
143 | [TOMOYO_TYPE_READ] = "read", |
144 | [TOMOYO_TYPE_WRITE] = "write", |
145 | [TOMOYO_TYPE_APPEND] = "append", |
146 | [TOMOYO_TYPE_UNLINK] = "unlink", |
147 | [TOMOYO_TYPE_GETATTR] = "getattr", |
148 | [TOMOYO_TYPE_RMDIR] = "rmdir", |
149 | [TOMOYO_TYPE_TRUNCATE] = "truncate", |
150 | [TOMOYO_TYPE_SYMLINK] = "symlink", |
151 | [TOMOYO_TYPE_CHROOT] = "chroot", |
152 | [TOMOYO_TYPE_UMOUNT] = "unmount", |
153 | }; |
154 | |
155 | /* String table for socket's operation. */ |
156 | const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION] = { |
157 | [TOMOYO_NETWORK_BIND] = "bind", |
158 | [TOMOYO_NETWORK_LISTEN] = "listen", |
159 | [TOMOYO_NETWORK_CONNECT] = "connect", |
160 | [TOMOYO_NETWORK_SEND] = "send", |
161 | }; |
162 | |
163 | /* String table for categories. */ |
164 | static const char * const tomoyo_category_keywords |
165 | [TOMOYO_MAX_MAC_CATEGORY_INDEX] = { |
166 | [TOMOYO_MAC_CATEGORY_FILE] = "file", |
167 | [TOMOYO_MAC_CATEGORY_NETWORK] = "network", |
168 | [TOMOYO_MAC_CATEGORY_MISC] = "misc", |
169 | }; |
170 | |
171 | /* Permit policy management by non-root user? */ |
172 | static bool tomoyo_manage_by_non_root; |
173 | |
174 | /* Utility functions. */ |
175 | |
176 | /** |
177 | * tomoyo_yesno - Return "yes" or "no". |
178 | * |
179 | * @value: Bool value. |
180 | */ |
181 | const char *tomoyo_yesno(const unsigned int value) |
182 | { |
183 | return value ? "yes" : "no"; |
184 | } |
185 | |
186 | /** |
187 | * tomoyo_addprintf - strncat()-like-snprintf(). |
188 | * |
189 | * @buffer: Buffer to write to. Must be '\0'-terminated. |
190 | * @len: Size of @buffer. |
191 | * @fmt: The printf()'s format string, followed by parameters. |
192 | * |
193 | * Returns nothing. |
194 | */ |
195 | static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...) |
196 | { |
197 | va_list args; |
198 | const int pos = strlen(buffer); |
199 | va_start(args, fmt); |
200 | vsnprintf(buffer + pos, len - pos - 1, fmt, args); |
201 | va_end(args); |
202 | } |
203 | |
204 | /** |
205 | * tomoyo_flush - Flush queued string to userspace's buffer. |
206 | * |
207 | * @head: Pointer to "struct tomoyo_io_buffer". |
208 | * |
209 | * Returns true if all data was flushed, false otherwise. |
210 | */ |
211 | static bool tomoyo_flush(struct tomoyo_io_buffer *head) |
212 | { |
213 | while (head->r.w_pos) { |
214 | const char *w = head->r.w[0]; |
215 | size_t len = strlen(w); |
216 | if (len) { |
217 | if (len > head->read_user_buf_avail) |
218 | len = head->read_user_buf_avail; |
219 | if (!len) |
220 | return false; |
221 | if (copy_to_user(head->read_user_buf, w, len)) |
222 | return false; |
223 | head->read_user_buf_avail -= len; |
224 | head->read_user_buf += len; |
225 | w += len; |
226 | } |
227 | head->r.w[0] = w; |
228 | if (*w) |
229 | return false; |
230 | /* Add '\0' for audit logs and query. */ |
231 | if (head->poll) { |
232 | if (!head->read_user_buf_avail || |
233 | copy_to_user(head->read_user_buf, "", 1)) |
234 | return false; |
235 | head->read_user_buf_avail--; |
236 | head->read_user_buf++; |
237 | } |
238 | head->r.w_pos--; |
239 | for (len = 0; len < head->r.w_pos; len++) |
240 | head->r.w[len] = head->r.w[len + 1]; |
241 | } |
242 | head->r.avail = 0; |
243 | return true; |
244 | } |
245 | |
246 | /** |
247 | * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure. |
248 | * |
249 | * @head: Pointer to "struct tomoyo_io_buffer". |
250 | * @string: String to print. |
251 | * |
252 | * Note that @string has to be kept valid until @head is kfree()d. |
253 | * This means that char[] allocated on stack memory cannot be passed to |
254 | * this function. Use tomoyo_io_printf() for char[] allocated on stack memory. |
255 | */ |
256 | static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string) |
257 | { |
258 | if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) { |
259 | head->r.w[head->r.w_pos++] = string; |
260 | tomoyo_flush(head); |
261 | } else |
262 | WARN_ON(1); |
263 | } |
264 | |
265 | static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, |
266 | ...) __printf(2, 3); |
267 | |
268 | /** |
269 | * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure. |
270 | * |
271 | * @head: Pointer to "struct tomoyo_io_buffer". |
272 | * @fmt: The printf()'s format string, followed by parameters. |
273 | */ |
274 | static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, |
275 | ...) |
276 | { |
277 | va_list args; |
278 | size_t len; |
279 | size_t pos = head->r.avail; |
280 | int size = head->readbuf_size - pos; |
281 | if (size <= 0) |
282 | return; |
283 | va_start(args, fmt); |
284 | len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1; |
285 | va_end(args); |
286 | if (pos + len >= head->readbuf_size) { |
287 | WARN_ON(1); |
288 | return; |
289 | } |
290 | head->r.avail += len; |
291 | tomoyo_set_string(head, head->read_buf + pos); |
292 | } |
293 | |
294 | /** |
295 | * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure. |
296 | * |
297 | * @head: Pointer to "struct tomoyo_io_buffer". |
298 | * |
299 | * Returns nothing. |
300 | */ |
301 | static void tomoyo_set_space(struct tomoyo_io_buffer *head) |
302 | { |
303 | tomoyo_set_string(head, " "); |
304 | } |
305 | |
306 | /** |
307 | * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure. |
308 | * |
309 | * @head: Pointer to "struct tomoyo_io_buffer". |
310 | * |
311 | * Returns nothing. |
312 | */ |
313 | static bool tomoyo_set_lf(struct tomoyo_io_buffer *head) |
314 | { |
315 | tomoyo_set_string(head, "\n"); |
316 | return !head->r.w_pos; |
317 | } |
318 | |
319 | /** |
320 | * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure. |
321 | * |
322 | * @head: Pointer to "struct tomoyo_io_buffer". |
323 | * |
324 | * Returns nothing. |
325 | */ |
326 | static void tomoyo_set_slash(struct tomoyo_io_buffer *head) |
327 | { |
328 | tomoyo_set_string(head, "/"); |
329 | } |
330 | |
331 | /* List of namespaces. */ |
332 | LIST_HEAD(tomoyo_namespace_list); |
333 | /* True if namespace other than tomoyo_kernel_namespace is defined. */ |
334 | static bool tomoyo_namespace_enabled; |
335 | |
336 | /** |
337 | * tomoyo_init_policy_namespace - Initialize namespace. |
338 | * |
339 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
340 | * |
341 | * Returns nothing. |
342 | */ |
343 | void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns) |
344 | { |
345 | unsigned int idx; |
346 | for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++) |
347 | INIT_LIST_HEAD(&ns->acl_group[idx]); |
348 | for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++) |
349 | INIT_LIST_HEAD(&ns->group_list[idx]); |
350 | for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++) |
351 | INIT_LIST_HEAD(&ns->policy_list[idx]); |
352 | ns->profile_version = 20110903; |
353 | tomoyo_namespace_enabled = !list_empty(&tomoyo_namespace_list); |
354 | list_add_tail_rcu(&ns->namespace_list, &tomoyo_namespace_list); |
355 | } |
356 | |
357 | /** |
358 | * tomoyo_print_namespace - Print namespace header. |
359 | * |
360 | * @head: Pointer to "struct tomoyo_io_buffer". |
361 | * |
362 | * Returns nothing. |
363 | */ |
364 | static void tomoyo_print_namespace(struct tomoyo_io_buffer *head) |
365 | { |
366 | if (!tomoyo_namespace_enabled) |
367 | return; |
368 | tomoyo_set_string(head, |
369 | container_of(head->r.ns, |
370 | struct tomoyo_policy_namespace, |
371 | namespace_list)->name); |
372 | tomoyo_set_space(head); |
373 | } |
374 | |
375 | /** |
376 | * tomoyo_print_name_union - Print a tomoyo_name_union. |
377 | * |
378 | * @head: Pointer to "struct tomoyo_io_buffer". |
379 | * @ptr: Pointer to "struct tomoyo_name_union". |
380 | */ |
381 | static void tomoyo_print_name_union(struct tomoyo_io_buffer *head, |
382 | const struct tomoyo_name_union *ptr) |
383 | { |
384 | tomoyo_set_space(head); |
385 | if (ptr->group) { |
386 | tomoyo_set_string(head, "@"); |
387 | tomoyo_set_string(head, ptr->group->group_name->name); |
388 | } else { |
389 | tomoyo_set_string(head, ptr->filename->name); |
390 | } |
391 | } |
392 | |
393 | /** |
394 | * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote. |
395 | * |
396 | * @head: Pointer to "struct tomoyo_io_buffer". |
397 | * @ptr: Pointer to "struct tomoyo_name_union". |
398 | * |
399 | * Returns nothing. |
400 | */ |
401 | static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer *head, |
402 | const struct tomoyo_name_union *ptr) |
403 | { |
404 | if (ptr->group) { |
405 | tomoyo_set_string(head, "@"); |
406 | tomoyo_set_string(head, ptr->group->group_name->name); |
407 | } else { |
408 | tomoyo_set_string(head, "\""); |
409 | tomoyo_set_string(head, ptr->filename->name); |
410 | tomoyo_set_string(head, "\""); |
411 | } |
412 | } |
413 | |
414 | /** |
415 | * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space. |
416 | * |
417 | * @head: Pointer to "struct tomoyo_io_buffer". |
418 | * @ptr: Pointer to "struct tomoyo_number_union". |
419 | * |
420 | * Returns nothing. |
421 | */ |
422 | static void tomoyo_print_number_union_nospace |
423 | (struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr) |
424 | { |
425 | if (ptr->group) { |
426 | tomoyo_set_string(head, "@"); |
427 | tomoyo_set_string(head, ptr->group->group_name->name); |
428 | } else { |
429 | int i; |
430 | unsigned long min = ptr->values[0]; |
431 | const unsigned long max = ptr->values[1]; |
432 | u8 min_type = ptr->value_type[0]; |
433 | const u8 max_type = ptr->value_type[1]; |
434 | char buffer[128]; |
435 | buffer[0] = '\0'; |
436 | for (i = 0; i < 2; i++) { |
437 | switch (min_type) { |
438 | case TOMOYO_VALUE_TYPE_HEXADECIMAL: |
439 | tomoyo_addprintf(buffer, sizeof(buffer), |
440 | "0x%lX", min); |
441 | break; |
442 | case TOMOYO_VALUE_TYPE_OCTAL: |
443 | tomoyo_addprintf(buffer, sizeof(buffer), |
444 | "0%lo", min); |
445 | break; |
446 | default: |
447 | tomoyo_addprintf(buffer, sizeof(buffer), "%lu", |
448 | min); |
449 | break; |
450 | } |
451 | if (min == max && min_type == max_type) |
452 | break; |
453 | tomoyo_addprintf(buffer, sizeof(buffer), "-"); |
454 | min_type = max_type; |
455 | min = max; |
456 | } |
457 | tomoyo_io_printf(head, "%s", buffer); |
458 | } |
459 | } |
460 | |
461 | /** |
462 | * tomoyo_print_number_union - Print a tomoyo_number_union. |
463 | * |
464 | * @head: Pointer to "struct tomoyo_io_buffer". |
465 | * @ptr: Pointer to "struct tomoyo_number_union". |
466 | * |
467 | * Returns nothing. |
468 | */ |
469 | static void tomoyo_print_number_union(struct tomoyo_io_buffer *head, |
470 | const struct tomoyo_number_union *ptr) |
471 | { |
472 | tomoyo_set_space(head); |
473 | tomoyo_print_number_union_nospace(head, ptr); |
474 | } |
475 | |
476 | /** |
477 | * tomoyo_assign_profile - Create a new profile. |
478 | * |
479 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
480 | * @profile: Profile number to create. |
481 | * |
482 | * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise. |
483 | */ |
484 | static struct tomoyo_profile *tomoyo_assign_profile |
485 | (struct tomoyo_policy_namespace *ns, const unsigned int profile) |
486 | { |
487 | struct tomoyo_profile *ptr; |
488 | struct tomoyo_profile *entry; |
489 | if (profile >= TOMOYO_MAX_PROFILES) |
490 | return NULL; |
491 | ptr = ns->profile_ptr[profile]; |
492 | if (ptr) |
493 | return ptr; |
494 | entry = kzalloc(sizeof(*entry), GFP_NOFS); |
495 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
496 | goto out; |
497 | ptr = ns->profile_ptr[profile]; |
498 | if (!ptr && tomoyo_memory_ok(entry)) { |
499 | ptr = entry; |
500 | ptr->default_config = TOMOYO_CONFIG_DISABLED | |
501 | TOMOYO_CONFIG_WANT_GRANT_LOG | |
502 | TOMOYO_CONFIG_WANT_REJECT_LOG; |
503 | memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT, |
504 | sizeof(ptr->config)); |
505 | ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] = |
506 | CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG; |
507 | ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] = |
508 | CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY; |
509 | mb(); /* Avoid out-of-order execution. */ |
510 | ns->profile_ptr[profile] = ptr; |
511 | entry = NULL; |
512 | } |
513 | mutex_unlock(&tomoyo_policy_lock); |
514 | out: |
515 | kfree(entry); |
516 | return ptr; |
517 | } |
518 | |
519 | /** |
520 | * tomoyo_profile - Find a profile. |
521 | * |
522 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
523 | * @profile: Profile number to find. |
524 | * |
525 | * Returns pointer to "struct tomoyo_profile". |
526 | */ |
527 | struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns, |
528 | const u8 profile) |
529 | { |
530 | static struct tomoyo_profile tomoyo_null_profile; |
531 | struct tomoyo_profile *ptr = ns->profile_ptr[profile]; |
532 | if (!ptr) |
533 | ptr = &tomoyo_null_profile; |
534 | return ptr; |
535 | } |
536 | |
537 | /** |
538 | * tomoyo_find_yesno - Find values for specified keyword. |
539 | * |
540 | * @string: String to check. |
541 | * @find: Name of keyword. |
542 | * |
543 | * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise. |
544 | */ |
545 | static s8 tomoyo_find_yesno(const char *string, const char *find) |
546 | { |
547 | const char *cp = strstr(string, find); |
548 | if (cp) { |
549 | cp += strlen(find); |
550 | if (!strncmp(cp, "=yes", 4)) |
551 | return 1; |
552 | else if (!strncmp(cp, "=no", 3)) |
553 | return 0; |
554 | } |
555 | return -1; |
556 | } |
557 | |
558 | /** |
559 | * tomoyo_set_uint - Set value for specified preference. |
560 | * |
561 | * @i: Pointer to "unsigned int". |
562 | * @string: String to check. |
563 | * @find: Name of keyword. |
564 | * |
565 | * Returns nothing. |
566 | */ |
567 | static void tomoyo_set_uint(unsigned int *i, const char *string, |
568 | const char *find) |
569 | { |
570 | const char *cp = strstr(string, find); |
571 | if (cp) |
572 | sscanf(cp + strlen(find), "=%u", i); |
573 | } |
574 | |
575 | /** |
576 | * tomoyo_set_mode - Set mode for specified profile. |
577 | * |
578 | * @name: Name of functionality. |
579 | * @value: Mode for @name. |
580 | * @profile: Pointer to "struct tomoyo_profile". |
581 | * |
582 | * Returns 0 on success, negative value otherwise. |
583 | */ |
584 | static int tomoyo_set_mode(char *name, const char *value, |
585 | struct tomoyo_profile *profile) |
586 | { |
587 | u8 i; |
588 | u8 config; |
589 | if (!strcmp(name, "CONFIG")) { |
590 | i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX; |
591 | config = profile->default_config; |
592 | } else if (tomoyo_str_starts(&name, "CONFIG::")) { |
593 | config = 0; |
594 | for (i = 0; i < TOMOYO_MAX_MAC_INDEX |
595 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) { |
596 | int len = 0; |
597 | if (i < TOMOYO_MAX_MAC_INDEX) { |
598 | const u8 c = tomoyo_index2category[i]; |
599 | const char *category = |
600 | tomoyo_category_keywords[c]; |
601 | len = strlen(category); |
602 | if (strncmp(name, category, len) || |
603 | name[len++] != ':' || name[len++] != ':') |
604 | continue; |
605 | } |
606 | if (strcmp(name + len, tomoyo_mac_keywords[i])) |
607 | continue; |
608 | config = profile->config[i]; |
609 | break; |
610 | } |
611 | if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) |
612 | return -EINVAL; |
613 | } else { |
614 | return -EINVAL; |
615 | } |
616 | if (strstr(value, "use_default")) { |
617 | config = TOMOYO_CONFIG_USE_DEFAULT; |
618 | } else { |
619 | u8 mode; |
620 | for (mode = 0; mode < 4; mode++) |
621 | if (strstr(value, tomoyo_mode[mode])) |
622 | /* |
623 | * Update lower 3 bits in order to distinguish |
624 | * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'. |
625 | */ |
626 | config = (config & ~7) | mode; |
627 | if (config != TOMOYO_CONFIG_USE_DEFAULT) { |
628 | switch (tomoyo_find_yesno(value, "grant_log")) { |
629 | case 1: |
630 | config |= TOMOYO_CONFIG_WANT_GRANT_LOG; |
631 | break; |
632 | case 0: |
633 | config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG; |
634 | break; |
635 | } |
636 | switch (tomoyo_find_yesno(value, "reject_log")) { |
637 | case 1: |
638 | config |= TOMOYO_CONFIG_WANT_REJECT_LOG; |
639 | break; |
640 | case 0: |
641 | config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG; |
642 | break; |
643 | } |
644 | } |
645 | } |
646 | if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) |
647 | profile->config[i] = config; |
648 | else if (config != TOMOYO_CONFIG_USE_DEFAULT) |
649 | profile->default_config = config; |
650 | return 0; |
651 | } |
652 | |
653 | /** |
654 | * tomoyo_write_profile - Write profile table. |
655 | * |
656 | * @head: Pointer to "struct tomoyo_io_buffer". |
657 | * |
658 | * Returns 0 on success, negative value otherwise. |
659 | */ |
660 | static int tomoyo_write_profile(struct tomoyo_io_buffer *head) |
661 | { |
662 | char *data = head->write_buf; |
663 | unsigned int i; |
664 | char *cp; |
665 | struct tomoyo_profile *profile; |
666 | if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version) |
667 | == 1) |
668 | return 0; |
669 | i = simple_strtoul(data, &cp, 10); |
670 | if (*cp != '-') |
671 | return -EINVAL; |
672 | data = cp + 1; |
673 | profile = tomoyo_assign_profile(head->w.ns, i); |
674 | if (!profile) |
675 | return -EINVAL; |
676 | cp = strchr(data, '='); |
677 | if (!cp) |
678 | return -EINVAL; |
679 | *cp++ = '\0'; |
680 | if (!strcmp(data, "COMMENT")) { |
681 | static DEFINE_SPINLOCK(lock); |
682 | const struct tomoyo_path_info *new_comment |
683 | = tomoyo_get_name(cp); |
684 | const struct tomoyo_path_info *old_comment; |
685 | if (!new_comment) |
686 | return -ENOMEM; |
687 | spin_lock(&lock); |
688 | old_comment = profile->comment; |
689 | profile->comment = new_comment; |
690 | spin_unlock(&lock); |
691 | tomoyo_put_name(old_comment); |
692 | return 0; |
693 | } |
694 | if (!strcmp(data, "PREFERENCE")) { |
695 | for (i = 0; i < TOMOYO_MAX_PREF; i++) |
696 | tomoyo_set_uint(&profile->pref[i], cp, |
697 | tomoyo_pref_keywords[i]); |
698 | return 0; |
699 | } |
700 | return tomoyo_set_mode(data, cp, profile); |
701 | } |
702 | |
703 | /** |
704 | * tomoyo_print_config - Print mode for specified functionality. |
705 | * |
706 | * @head: Pointer to "struct tomoyo_io_buffer". |
707 | * @config: Mode for that functionality. |
708 | * |
709 | * Returns nothing. |
710 | * |
711 | * Caller prints functionality's name. |
712 | */ |
713 | static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config) |
714 | { |
715 | tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n", |
716 | tomoyo_mode[config & 3], |
717 | tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG), |
718 | tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG)); |
719 | } |
720 | |
721 | /** |
722 | * tomoyo_read_profile - Read profile table. |
723 | * |
724 | * @head: Pointer to "struct tomoyo_io_buffer". |
725 | * |
726 | * Returns nothing. |
727 | */ |
728 | static void tomoyo_read_profile(struct tomoyo_io_buffer *head) |
729 | { |
730 | u8 index; |
731 | struct tomoyo_policy_namespace *ns = |
732 | container_of(head->r.ns, typeof(*ns), namespace_list); |
733 | const struct tomoyo_profile *profile; |
734 | if (head->r.eof) |
735 | return; |
736 | next: |
737 | index = head->r.index; |
738 | profile = ns->profile_ptr[index]; |
739 | switch (head->r.step) { |
740 | case 0: |
741 | tomoyo_print_namespace(head); |
742 | tomoyo_io_printf(head, "PROFILE_VERSION=%u\n", |
743 | ns->profile_version); |
744 | head->r.step++; |
745 | break; |
746 | case 1: |
747 | for ( ; head->r.index < TOMOYO_MAX_PROFILES; |
748 | head->r.index++) |
749 | if (ns->profile_ptr[head->r.index]) |
750 | break; |
751 | if (head->r.index == TOMOYO_MAX_PROFILES) { |
752 | head->r.eof = true; |
753 | return; |
754 | } |
755 | head->r.step++; |
756 | break; |
757 | case 2: |
758 | { |
759 | u8 i; |
760 | const struct tomoyo_path_info *comment = |
761 | profile->comment; |
762 | tomoyo_print_namespace(head); |
763 | tomoyo_io_printf(head, "%u-COMMENT=", index); |
764 | tomoyo_set_string(head, comment ? comment->name : ""); |
765 | tomoyo_set_lf(head); |
766 | tomoyo_print_namespace(head); |
767 | tomoyo_io_printf(head, "%u-PREFERENCE={ ", index); |
768 | for (i = 0; i < TOMOYO_MAX_PREF; i++) |
769 | tomoyo_io_printf(head, "%s=%u ", |
770 | tomoyo_pref_keywords[i], |
771 | profile->pref[i]); |
772 | tomoyo_set_string(head, "}\n"); |
773 | head->r.step++; |
774 | } |
775 | break; |
776 | case 3: |
777 | { |
778 | tomoyo_print_namespace(head); |
779 | tomoyo_io_printf(head, "%u-%s", index, "CONFIG"); |
780 | tomoyo_print_config(head, profile->default_config); |
781 | head->r.bit = 0; |
782 | head->r.step++; |
783 | } |
784 | break; |
785 | case 4: |
786 | for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX |
787 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) { |
788 | const u8 i = head->r.bit; |
789 | const u8 config = profile->config[i]; |
790 | if (config == TOMOYO_CONFIG_USE_DEFAULT) |
791 | continue; |
792 | tomoyo_print_namespace(head); |
793 | if (i < TOMOYO_MAX_MAC_INDEX) |
794 | tomoyo_io_printf(head, "%u-CONFIG::%s::%s", |
795 | index, |
796 | tomoyo_category_keywords |
797 | [tomoyo_index2category[i]], |
798 | tomoyo_mac_keywords[i]); |
799 | else |
800 | tomoyo_io_printf(head, "%u-CONFIG::%s", index, |
801 | tomoyo_mac_keywords[i]); |
802 | tomoyo_print_config(head, config); |
803 | head->r.bit++; |
804 | break; |
805 | } |
806 | if (head->r.bit == TOMOYO_MAX_MAC_INDEX |
807 | + TOMOYO_MAX_MAC_CATEGORY_INDEX) { |
808 | head->r.index++; |
809 | head->r.step = 1; |
810 | } |
811 | break; |
812 | } |
813 | if (tomoyo_flush(head)) |
814 | goto next; |
815 | } |
816 | |
817 | /** |
818 | * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry. |
819 | * |
820 | * @a: Pointer to "struct tomoyo_acl_head". |
821 | * @b: Pointer to "struct tomoyo_acl_head". |
822 | * |
823 | * Returns true if @a == @b, false otherwise. |
824 | */ |
825 | static bool tomoyo_same_manager(const struct tomoyo_acl_head *a, |
826 | const struct tomoyo_acl_head *b) |
827 | { |
828 | return container_of(a, struct tomoyo_manager, head)->manager == |
829 | container_of(b, struct tomoyo_manager, head)->manager; |
830 | } |
831 | |
832 | /** |
833 | * tomoyo_update_manager_entry - Add a manager entry. |
834 | * |
835 | * @manager: The path to manager or the domainnamme. |
836 | * @is_delete: True if it is a delete request. |
837 | * |
838 | * Returns 0 on success, negative value otherwise. |
839 | * |
840 | * Caller holds tomoyo_read_lock(). |
841 | */ |
842 | static int tomoyo_update_manager_entry(const char *manager, |
843 | const bool is_delete) |
844 | { |
845 | struct tomoyo_manager e = { }; |
846 | struct tomoyo_acl_param param = { |
847 | /* .ns = &tomoyo_kernel_namespace, */ |
848 | .is_delete = is_delete, |
849 | .list = &tomoyo_kernel_namespace. |
850 | policy_list[TOMOYO_ID_MANAGER], |
851 | }; |
852 | int error = is_delete ? -ENOENT : -ENOMEM; |
853 | if (!tomoyo_correct_domain(manager) && |
854 | !tomoyo_correct_word(manager)) |
855 | return -EINVAL; |
856 | e.manager = tomoyo_get_name(manager); |
857 | if (e.manager) { |
858 | error = tomoyo_update_policy(&e.head, sizeof(e), ¶m, |
859 | tomoyo_same_manager); |
860 | tomoyo_put_name(e.manager); |
861 | } |
862 | return error; |
863 | } |
864 | |
865 | /** |
866 | * tomoyo_write_manager - Write manager policy. |
867 | * |
868 | * @head: Pointer to "struct tomoyo_io_buffer". |
869 | * |
870 | * Returns 0 on success, negative value otherwise. |
871 | * |
872 | * Caller holds tomoyo_read_lock(). |
873 | */ |
874 | static int tomoyo_write_manager(struct tomoyo_io_buffer *head) |
875 | { |
876 | char *data = head->write_buf; |
877 | |
878 | if (!strcmp(data, "manage_by_non_root")) { |
879 | tomoyo_manage_by_non_root = !head->w.is_delete; |
880 | return 0; |
881 | } |
882 | return tomoyo_update_manager_entry(data, head->w.is_delete); |
883 | } |
884 | |
885 | /** |
886 | * tomoyo_read_manager - Read manager policy. |
887 | * |
888 | * @head: Pointer to "struct tomoyo_io_buffer". |
889 | * |
890 | * Caller holds tomoyo_read_lock(). |
891 | */ |
892 | static void tomoyo_read_manager(struct tomoyo_io_buffer *head) |
893 | { |
894 | if (head->r.eof) |
895 | return; |
896 | list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace. |
897 | policy_list[TOMOYO_ID_MANAGER]) { |
898 | struct tomoyo_manager *ptr = |
899 | list_entry(head->r.acl, typeof(*ptr), head.list); |
900 | if (ptr->head.is_deleted) |
901 | continue; |
902 | if (!tomoyo_flush(head)) |
903 | return; |
904 | tomoyo_set_string(head, ptr->manager->name); |
905 | tomoyo_set_lf(head); |
906 | } |
907 | head->r.eof = true; |
908 | } |
909 | |
910 | /** |
911 | * tomoyo_manager - Check whether the current process is a policy manager. |
912 | * |
913 | * Returns true if the current process is permitted to modify policy |
914 | * via /sys/kernel/security/tomoyo/ interface. |
915 | * |
916 | * Caller holds tomoyo_read_lock(). |
917 | */ |
918 | static bool tomoyo_manager(void) |
919 | { |
920 | struct tomoyo_manager *ptr; |
921 | const char *exe; |
922 | const struct task_struct *task = current; |
923 | const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname; |
924 | bool found = false; |
925 | |
926 | if (!tomoyo_policy_loaded) |
927 | return true; |
928 | if (!tomoyo_manage_by_non_root && |
929 | (!uid_eq(task->cred->uid, GLOBAL_ROOT_UID) || |
930 | !uid_eq(task->cred->euid, GLOBAL_ROOT_UID))) |
931 | return false; |
932 | exe = tomoyo_get_exe(); |
933 | if (!exe) |
934 | return false; |
935 | list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace. |
936 | policy_list[TOMOYO_ID_MANAGER], head.list) { |
937 | if (!ptr->head.is_deleted && |
938 | (!tomoyo_pathcmp(domainname, ptr->manager) || |
939 | !strcmp(exe, ptr->manager->name))) { |
940 | found = true; |
941 | break; |
942 | } |
943 | } |
944 | if (!found) { /* Reduce error messages. */ |
945 | static pid_t last_pid; |
946 | const pid_t pid = current->pid; |
947 | if (last_pid != pid) { |
948 | printk(KERN_WARNING "%s ( %s ) is not permitted to " |
949 | "update policies.\n", domainname->name, exe); |
950 | last_pid = pid; |
951 | } |
952 | } |
953 | kfree(exe); |
954 | return found; |
955 | } |
956 | |
957 | static struct tomoyo_domain_info *tomoyo_find_domain_by_qid |
958 | (unsigned int serial); |
959 | |
960 | /** |
961 | * tomoyo_select_domain - Parse select command. |
962 | * |
963 | * @head: Pointer to "struct tomoyo_io_buffer". |
964 | * @data: String to parse. |
965 | * |
966 | * Returns true on success, false otherwise. |
967 | * |
968 | * Caller holds tomoyo_read_lock(). |
969 | */ |
970 | static bool tomoyo_select_domain(struct tomoyo_io_buffer *head, |
971 | const char *data) |
972 | { |
973 | unsigned int pid; |
974 | struct tomoyo_domain_info *domain = NULL; |
975 | bool global_pid = false; |
976 | if (strncmp(data, "select ", 7)) |
977 | return false; |
978 | data += 7; |
979 | if (sscanf(data, "pid=%u", &pid) == 1 || |
980 | (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) { |
981 | struct task_struct *p; |
982 | rcu_read_lock(); |
983 | if (global_pid) |
984 | p = find_task_by_pid_ns(pid, &init_pid_ns); |
985 | else |
986 | p = find_task_by_vpid(pid); |
987 | if (p) |
988 | domain = tomoyo_real_domain(p); |
989 | rcu_read_unlock(); |
990 | } else if (!strncmp(data, "domain=", 7)) { |
991 | if (tomoyo_domain_def(data + 7)) |
992 | domain = tomoyo_find_domain(data + 7); |
993 | } else if (sscanf(data, "Q=%u", &pid) == 1) { |
994 | domain = tomoyo_find_domain_by_qid(pid); |
995 | } else |
996 | return false; |
997 | head->w.domain = domain; |
998 | /* Accessing read_buf is safe because head->io_sem is held. */ |
999 | if (!head->read_buf) |
1000 | return true; /* Do nothing if open(O_WRONLY). */ |
1001 | memset(&head->r, 0, sizeof(head->r)); |
1002 | head->r.print_this_domain_only = true; |
1003 | if (domain) |
1004 | head->r.domain = &domain->list; |
1005 | else |
1006 | head->r.eof = 1; |
1007 | tomoyo_io_printf(head, "# select %s\n", data); |
1008 | if (domain && domain->is_deleted) |
1009 | tomoyo_io_printf(head, "# This is a deleted domain.\n"); |
1010 | return true; |
1011 | } |
1012 | |
1013 | /** |
1014 | * tomoyo_same_task_acl - Check for duplicated "struct tomoyo_task_acl" entry. |
1015 | * |
1016 | * @a: Pointer to "struct tomoyo_acl_info". |
1017 | * @b: Pointer to "struct tomoyo_acl_info". |
1018 | * |
1019 | * Returns true if @a == @b, false otherwise. |
1020 | */ |
1021 | static bool tomoyo_same_task_acl(const struct tomoyo_acl_info *a, |
1022 | const struct tomoyo_acl_info *b) |
1023 | { |
1024 | const struct tomoyo_task_acl *p1 = container_of(a, typeof(*p1), head); |
1025 | const struct tomoyo_task_acl *p2 = container_of(b, typeof(*p2), head); |
1026 | return p1->domainname == p2->domainname; |
1027 | } |
1028 | |
1029 | /** |
1030 | * tomoyo_write_task - Update task related list. |
1031 | * |
1032 | * @param: Pointer to "struct tomoyo_acl_param". |
1033 | * |
1034 | * Returns 0 on success, negative value otherwise. |
1035 | * |
1036 | * Caller holds tomoyo_read_lock(). |
1037 | */ |
1038 | static int tomoyo_write_task(struct tomoyo_acl_param *param) |
1039 | { |
1040 | int error = -EINVAL; |
1041 | if (tomoyo_str_starts(¶m->data, "manual_domain_transition ")) { |
1042 | struct tomoyo_task_acl e = { |
1043 | .head.type = TOMOYO_TYPE_MANUAL_TASK_ACL, |
1044 | .domainname = tomoyo_get_domainname(param), |
1045 | }; |
1046 | if (e.domainname) |
1047 | error = tomoyo_update_domain(&e.head, sizeof(e), param, |
1048 | tomoyo_same_task_acl, |
1049 | NULL); |
1050 | tomoyo_put_name(e.domainname); |
1051 | } |
1052 | return error; |
1053 | } |
1054 | |
1055 | /** |
1056 | * tomoyo_delete_domain - Delete a domain. |
1057 | * |
1058 | * @domainname: The name of domain. |
1059 | * |
1060 | * Returns 0 on success, negative value otherwise. |
1061 | * |
1062 | * Caller holds tomoyo_read_lock(). |
1063 | */ |
1064 | static int tomoyo_delete_domain(char *domainname) |
1065 | { |
1066 | struct tomoyo_domain_info *domain; |
1067 | struct tomoyo_path_info name; |
1068 | |
1069 | name.name = domainname; |
1070 | tomoyo_fill_path_info(&name); |
1071 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
1072 | return -EINTR; |
1073 | /* Is there an active domain? */ |
1074 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
1075 | /* Never delete tomoyo_kernel_domain */ |
1076 | if (domain == &tomoyo_kernel_domain) |
1077 | continue; |
1078 | if (domain->is_deleted || |
1079 | tomoyo_pathcmp(domain->domainname, &name)) |
1080 | continue; |
1081 | domain->is_deleted = true; |
1082 | break; |
1083 | } |
1084 | mutex_unlock(&tomoyo_policy_lock); |
1085 | return 0; |
1086 | } |
1087 | |
1088 | /** |
1089 | * tomoyo_write_domain2 - Write domain policy. |
1090 | * |
1091 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
1092 | * @list: Pointer to "struct list_head". |
1093 | * @data: Policy to be interpreted. |
1094 | * @is_delete: True if it is a delete request. |
1095 | * |
1096 | * Returns 0 on success, negative value otherwise. |
1097 | * |
1098 | * Caller holds tomoyo_read_lock(). |
1099 | */ |
1100 | static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns, |
1101 | struct list_head *list, char *data, |
1102 | const bool is_delete) |
1103 | { |
1104 | struct tomoyo_acl_param param = { |
1105 | .ns = ns, |
1106 | .list = list, |
1107 | .data = data, |
1108 | .is_delete = is_delete, |
1109 | }; |
1110 | static const struct { |
1111 | const char *keyword; |
1112 | int (*write) (struct tomoyo_acl_param *); |
1113 | } tomoyo_callback[5] = { |
1114 | { "file ", tomoyo_write_file }, |
1115 | { "network inet ", tomoyo_write_inet_network }, |
1116 | { "network unix ", tomoyo_write_unix_network }, |
1117 | { "misc ", tomoyo_write_misc }, |
1118 | { "task ", tomoyo_write_task }, |
1119 | }; |
1120 | u8 i; |
1121 | |
1122 | for (i = 0; i < ARRAY_SIZE(tomoyo_callback); i++) { |
1123 | if (!tomoyo_str_starts(¶m.data, |
1124 | tomoyo_callback[i].keyword)) |
1125 | continue; |
1126 | return tomoyo_callback[i].write(¶m); |
1127 | } |
1128 | return -EINVAL; |
1129 | } |
1130 | |
1131 | /* String table for domain flags. */ |
1132 | const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = { |
1133 | [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n", |
1134 | [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n", |
1135 | }; |
1136 | |
1137 | /** |
1138 | * tomoyo_write_domain - Write domain policy. |
1139 | * |
1140 | * @head: Pointer to "struct tomoyo_io_buffer". |
1141 | * |
1142 | * Returns 0 on success, negative value otherwise. |
1143 | * |
1144 | * Caller holds tomoyo_read_lock(). |
1145 | */ |
1146 | static int tomoyo_write_domain(struct tomoyo_io_buffer *head) |
1147 | { |
1148 | char *data = head->write_buf; |
1149 | struct tomoyo_policy_namespace *ns; |
1150 | struct tomoyo_domain_info *domain = head->w.domain; |
1151 | const bool is_delete = head->w.is_delete; |
1152 | bool is_select = !is_delete && tomoyo_str_starts(&data, "select "); |
1153 | unsigned int profile; |
1154 | if (*data == '<') { |
1155 | int ret = 0; |
1156 | domain = NULL; |
1157 | if (is_delete) |
1158 | ret = tomoyo_delete_domain(data); |
1159 | else if (is_select) |
1160 | domain = tomoyo_find_domain(data); |
1161 | else |
1162 | domain = tomoyo_assign_domain(data, false); |
1163 | head->w.domain = domain; |
1164 | return ret; |
1165 | } |
1166 | if (!domain) |
1167 | return -EINVAL; |
1168 | ns = domain->ns; |
1169 | if (sscanf(data, "use_profile %u", &profile) == 1 |
1170 | && profile < TOMOYO_MAX_PROFILES) { |
1171 | if (!tomoyo_policy_loaded || ns->profile_ptr[profile]) |
1172 | domain->profile = (u8) profile; |
1173 | return 0; |
1174 | } |
1175 | if (sscanf(data, "use_group %u\n", &profile) == 1 |
1176 | && profile < TOMOYO_MAX_ACL_GROUPS) { |
1177 | if (!is_delete) |
1178 | domain->group = (u8) profile; |
1179 | return 0; |
1180 | } |
1181 | for (profile = 0; profile < TOMOYO_MAX_DOMAIN_INFO_FLAGS; profile++) { |
1182 | const char *cp = tomoyo_dif[profile]; |
1183 | if (strncmp(data, cp, strlen(cp) - 1)) |
1184 | continue; |
1185 | domain->flags[profile] = !is_delete; |
1186 | return 0; |
1187 | } |
1188 | return tomoyo_write_domain2(ns, &domain->acl_info_list, data, |
1189 | is_delete); |
1190 | } |
1191 | |
1192 | /** |
1193 | * tomoyo_print_condition - Print condition part. |
1194 | * |
1195 | * @head: Pointer to "struct tomoyo_io_buffer". |
1196 | * @cond: Pointer to "struct tomoyo_condition". |
1197 | * |
1198 | * Returns true on success, false otherwise. |
1199 | */ |
1200 | static bool tomoyo_print_condition(struct tomoyo_io_buffer *head, |
1201 | const struct tomoyo_condition *cond) |
1202 | { |
1203 | switch (head->r.cond_step) { |
1204 | case 0: |
1205 | head->r.cond_index = 0; |
1206 | head->r.cond_step++; |
1207 | if (cond->transit) { |
1208 | tomoyo_set_space(head); |
1209 | tomoyo_set_string(head, cond->transit->name); |
1210 | } |
1211 | /* fall through */ |
1212 | case 1: |
1213 | { |
1214 | const u16 condc = cond->condc; |
1215 | const struct tomoyo_condition_element *condp = |
1216 | (typeof(condp)) (cond + 1); |
1217 | const struct tomoyo_number_union *numbers_p = |
1218 | (typeof(numbers_p)) (condp + condc); |
1219 | const struct tomoyo_name_union *names_p = |
1220 | (typeof(names_p)) |
1221 | (numbers_p + cond->numbers_count); |
1222 | const struct tomoyo_argv *argv = |
1223 | (typeof(argv)) (names_p + cond->names_count); |
1224 | const struct tomoyo_envp *envp = |
1225 | (typeof(envp)) (argv + cond->argc); |
1226 | u16 skip; |
1227 | for (skip = 0; skip < head->r.cond_index; skip++) { |
1228 | const u8 left = condp->left; |
1229 | const u8 right = condp->right; |
1230 | condp++; |
1231 | switch (left) { |
1232 | case TOMOYO_ARGV_ENTRY: |
1233 | argv++; |
1234 | continue; |
1235 | case TOMOYO_ENVP_ENTRY: |
1236 | envp++; |
1237 | continue; |
1238 | case TOMOYO_NUMBER_UNION: |
1239 | numbers_p++; |
1240 | break; |
1241 | } |
1242 | switch (right) { |
1243 | case TOMOYO_NAME_UNION: |
1244 | names_p++; |
1245 | break; |
1246 | case TOMOYO_NUMBER_UNION: |
1247 | numbers_p++; |
1248 | break; |
1249 | } |
1250 | } |
1251 | while (head->r.cond_index < condc) { |
1252 | const u8 match = condp->equals; |
1253 | const u8 left = condp->left; |
1254 | const u8 right = condp->right; |
1255 | if (!tomoyo_flush(head)) |
1256 | return false; |
1257 | condp++; |
1258 | head->r.cond_index++; |
1259 | tomoyo_set_space(head); |
1260 | switch (left) { |
1261 | case TOMOYO_ARGV_ENTRY: |
1262 | tomoyo_io_printf(head, |
1263 | "exec.argv[%lu]%s=\"", |
1264 | argv->index, argv-> |
1265 | is_not ? "!" : ""); |
1266 | tomoyo_set_string(head, |
1267 | argv->value->name); |
1268 | tomoyo_set_string(head, "\""); |
1269 | argv++; |
1270 | continue; |
1271 | case TOMOYO_ENVP_ENTRY: |
1272 | tomoyo_set_string(head, |
1273 | "exec.envp[\""); |
1274 | tomoyo_set_string(head, |
1275 | envp->name->name); |
1276 | tomoyo_io_printf(head, "\"]%s=", envp-> |
1277 | is_not ? "!" : ""); |
1278 | if (envp->value) { |
1279 | tomoyo_set_string(head, "\""); |
1280 | tomoyo_set_string(head, envp-> |
1281 | value->name); |
1282 | tomoyo_set_string(head, "\""); |
1283 | } else { |
1284 | tomoyo_set_string(head, |
1285 | "NULL"); |
1286 | } |
1287 | envp++; |
1288 | continue; |
1289 | case TOMOYO_NUMBER_UNION: |
1290 | tomoyo_print_number_union_nospace |
1291 | (head, numbers_p++); |
1292 | break; |
1293 | default: |
1294 | tomoyo_set_string(head, |
1295 | tomoyo_condition_keyword[left]); |
1296 | break; |
1297 | } |
1298 | tomoyo_set_string(head, match ? "=" : "!="); |
1299 | switch (right) { |
1300 | case TOMOYO_NAME_UNION: |
1301 | tomoyo_print_name_union_quoted |
1302 | (head, names_p++); |
1303 | break; |
1304 | case TOMOYO_NUMBER_UNION: |
1305 | tomoyo_print_number_union_nospace |
1306 | (head, numbers_p++); |
1307 | break; |
1308 | default: |
1309 | tomoyo_set_string(head, |
1310 | tomoyo_condition_keyword[right]); |
1311 | break; |
1312 | } |
1313 | } |
1314 | } |
1315 | head->r.cond_step++; |
1316 | /* fall through */ |
1317 | case 2: |
1318 | if (!tomoyo_flush(head)) |
1319 | break; |
1320 | head->r.cond_step++; |
1321 | /* fall through */ |
1322 | case 3: |
1323 | if (cond->grant_log != TOMOYO_GRANTLOG_AUTO) |
1324 | tomoyo_io_printf(head, " grant_log=%s", |
1325 | tomoyo_yesno(cond->grant_log == |
1326 | TOMOYO_GRANTLOG_YES)); |
1327 | tomoyo_set_lf(head); |
1328 | return true; |
1329 | } |
1330 | return false; |
1331 | } |
1332 | |
1333 | /** |
1334 | * tomoyo_set_group - Print "acl_group " header keyword and category name. |
1335 | * |
1336 | * @head: Pointer to "struct tomoyo_io_buffer". |
1337 | * @category: Category name. |
1338 | * |
1339 | * Returns nothing. |
1340 | */ |
1341 | static void tomoyo_set_group(struct tomoyo_io_buffer *head, |
1342 | const char *category) |
1343 | { |
1344 | if (head->type == TOMOYO_EXCEPTIONPOLICY) { |
1345 | tomoyo_print_namespace(head); |
1346 | tomoyo_io_printf(head, "acl_group %u ", |
1347 | head->r.acl_group_index); |
1348 | } |
1349 | tomoyo_set_string(head, category); |
1350 | } |
1351 | |
1352 | /** |
1353 | * tomoyo_print_entry - Print an ACL entry. |
1354 | * |
1355 | * @head: Pointer to "struct tomoyo_io_buffer". |
1356 | * @acl: Pointer to an ACL entry. |
1357 | * |
1358 | * Returns true on success, false otherwise. |
1359 | */ |
1360 | static bool tomoyo_print_entry(struct tomoyo_io_buffer *head, |
1361 | struct tomoyo_acl_info *acl) |
1362 | { |
1363 | const u8 acl_type = acl->type; |
1364 | bool first = true; |
1365 | u8 bit; |
1366 | |
1367 | if (head->r.print_cond_part) |
1368 | goto print_cond_part; |
1369 | if (acl->is_deleted) |
1370 | return true; |
1371 | if (!tomoyo_flush(head)) |
1372 | return false; |
1373 | else if (acl_type == TOMOYO_TYPE_PATH_ACL) { |
1374 | struct tomoyo_path_acl *ptr = |
1375 | container_of(acl, typeof(*ptr), head); |
1376 | const u16 perm = ptr->perm; |
1377 | for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) { |
1378 | if (!(perm & (1 << bit))) |
1379 | continue; |
1380 | if (head->r.print_transition_related_only && |
1381 | bit != TOMOYO_TYPE_EXECUTE) |
1382 | continue; |
1383 | if (first) { |
1384 | tomoyo_set_group(head, "file "); |
1385 | first = false; |
1386 | } else { |
1387 | tomoyo_set_slash(head); |
1388 | } |
1389 | tomoyo_set_string(head, tomoyo_path_keyword[bit]); |
1390 | } |
1391 | if (first) |
1392 | return true; |
1393 | tomoyo_print_name_union(head, &ptr->name); |
1394 | } else if (acl_type == TOMOYO_TYPE_MANUAL_TASK_ACL) { |
1395 | struct tomoyo_task_acl *ptr = |
1396 | container_of(acl, typeof(*ptr), head); |
1397 | tomoyo_set_group(head, "task "); |
1398 | tomoyo_set_string(head, "manual_domain_transition "); |
1399 | tomoyo_set_string(head, ptr->domainname->name); |
1400 | } else if (head->r.print_transition_related_only) { |
1401 | return true; |
1402 | } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) { |
1403 | struct tomoyo_path2_acl *ptr = |
1404 | container_of(acl, typeof(*ptr), head); |
1405 | const u8 perm = ptr->perm; |
1406 | for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) { |
1407 | if (!(perm & (1 << bit))) |
1408 | continue; |
1409 | if (first) { |
1410 | tomoyo_set_group(head, "file "); |
1411 | first = false; |
1412 | } else { |
1413 | tomoyo_set_slash(head); |
1414 | } |
1415 | tomoyo_set_string(head, tomoyo_mac_keywords |
1416 | [tomoyo_pp2mac[bit]]); |
1417 | } |
1418 | if (first) |
1419 | return true; |
1420 | tomoyo_print_name_union(head, &ptr->name1); |
1421 | tomoyo_print_name_union(head, &ptr->name2); |
1422 | } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) { |
1423 | struct tomoyo_path_number_acl *ptr = |
1424 | container_of(acl, typeof(*ptr), head); |
1425 | const u8 perm = ptr->perm; |
1426 | for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) { |
1427 | if (!(perm & (1 << bit))) |
1428 | continue; |
1429 | if (first) { |
1430 | tomoyo_set_group(head, "file "); |
1431 | first = false; |
1432 | } else { |
1433 | tomoyo_set_slash(head); |
1434 | } |
1435 | tomoyo_set_string(head, tomoyo_mac_keywords |
1436 | [tomoyo_pn2mac[bit]]); |
1437 | } |
1438 | if (first) |
1439 | return true; |
1440 | tomoyo_print_name_union(head, &ptr->name); |
1441 | tomoyo_print_number_union(head, &ptr->number); |
1442 | } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) { |
1443 | struct tomoyo_mkdev_acl *ptr = |
1444 | container_of(acl, typeof(*ptr), head); |
1445 | const u8 perm = ptr->perm; |
1446 | for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) { |
1447 | if (!(perm & (1 << bit))) |
1448 | continue; |
1449 | if (first) { |
1450 | tomoyo_set_group(head, "file "); |
1451 | first = false; |
1452 | } else { |
1453 | tomoyo_set_slash(head); |
1454 | } |
1455 | tomoyo_set_string(head, tomoyo_mac_keywords |
1456 | [tomoyo_pnnn2mac[bit]]); |
1457 | } |
1458 | if (first) |
1459 | return true; |
1460 | tomoyo_print_name_union(head, &ptr->name); |
1461 | tomoyo_print_number_union(head, &ptr->mode); |
1462 | tomoyo_print_number_union(head, &ptr->major); |
1463 | tomoyo_print_number_union(head, &ptr->minor); |
1464 | } else if (acl_type == TOMOYO_TYPE_INET_ACL) { |
1465 | struct tomoyo_inet_acl *ptr = |
1466 | container_of(acl, typeof(*ptr), head); |
1467 | const u8 perm = ptr->perm; |
1468 | |
1469 | for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) { |
1470 | if (!(perm & (1 << bit))) |
1471 | continue; |
1472 | if (first) { |
1473 | tomoyo_set_group(head, "network inet "); |
1474 | tomoyo_set_string(head, tomoyo_proto_keyword |
1475 | [ptr->protocol]); |
1476 | tomoyo_set_space(head); |
1477 | first = false; |
1478 | } else { |
1479 | tomoyo_set_slash(head); |
1480 | } |
1481 | tomoyo_set_string(head, tomoyo_socket_keyword[bit]); |
1482 | } |
1483 | if (first) |
1484 | return true; |
1485 | tomoyo_set_space(head); |
1486 | if (ptr->address.group) { |
1487 | tomoyo_set_string(head, "@"); |
1488 | tomoyo_set_string(head, ptr->address.group->group_name |
1489 | ->name); |
1490 | } else { |
1491 | char buf[128]; |
1492 | tomoyo_print_ip(buf, sizeof(buf), &ptr->address); |
1493 | tomoyo_io_printf(head, "%s", buf); |
1494 | } |
1495 | tomoyo_print_number_union(head, &ptr->port); |
1496 | } else if (acl_type == TOMOYO_TYPE_UNIX_ACL) { |
1497 | struct tomoyo_unix_acl *ptr = |
1498 | container_of(acl, typeof(*ptr), head); |
1499 | const u8 perm = ptr->perm; |
1500 | |
1501 | for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) { |
1502 | if (!(perm & (1 << bit))) |
1503 | continue; |
1504 | if (first) { |
1505 | tomoyo_set_group(head, "network unix "); |
1506 | tomoyo_set_string(head, tomoyo_proto_keyword |
1507 | [ptr->protocol]); |
1508 | tomoyo_set_space(head); |
1509 | first = false; |
1510 | } else { |
1511 | tomoyo_set_slash(head); |
1512 | } |
1513 | tomoyo_set_string(head, tomoyo_socket_keyword[bit]); |
1514 | } |
1515 | if (first) |
1516 | return true; |
1517 | tomoyo_print_name_union(head, &ptr->name); |
1518 | } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) { |
1519 | struct tomoyo_mount_acl *ptr = |
1520 | container_of(acl, typeof(*ptr), head); |
1521 | tomoyo_set_group(head, "file mount"); |
1522 | tomoyo_print_name_union(head, &ptr->dev_name); |
1523 | tomoyo_print_name_union(head, &ptr->dir_name); |
1524 | tomoyo_print_name_union(head, &ptr->fs_type); |
1525 | tomoyo_print_number_union(head, &ptr->flags); |
1526 | } else if (acl_type == TOMOYO_TYPE_ENV_ACL) { |
1527 | struct tomoyo_env_acl *ptr = |
1528 | container_of(acl, typeof(*ptr), head); |
1529 | |
1530 | tomoyo_set_group(head, "misc env "); |
1531 | tomoyo_set_string(head, ptr->env->name); |
1532 | } |
1533 | if (acl->cond) { |
1534 | head->r.print_cond_part = true; |
1535 | head->r.cond_step = 0; |
1536 | if (!tomoyo_flush(head)) |
1537 | return false; |
1538 | print_cond_part: |
1539 | if (!tomoyo_print_condition(head, acl->cond)) |
1540 | return false; |
1541 | head->r.print_cond_part = false; |
1542 | } else { |
1543 | tomoyo_set_lf(head); |
1544 | } |
1545 | return true; |
1546 | } |
1547 | |
1548 | /** |
1549 | * tomoyo_read_domain2 - Read domain policy. |
1550 | * |
1551 | * @head: Pointer to "struct tomoyo_io_buffer". |
1552 | * @list: Pointer to "struct list_head". |
1553 | * |
1554 | * Caller holds tomoyo_read_lock(). |
1555 | * |
1556 | * Returns true on success, false otherwise. |
1557 | */ |
1558 | static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head, |
1559 | struct list_head *list) |
1560 | { |
1561 | list_for_each_cookie(head->r.acl, list) { |
1562 | struct tomoyo_acl_info *ptr = |
1563 | list_entry(head->r.acl, typeof(*ptr), list); |
1564 | if (!tomoyo_print_entry(head, ptr)) |
1565 | return false; |
1566 | } |
1567 | head->r.acl = NULL; |
1568 | return true; |
1569 | } |
1570 | |
1571 | /** |
1572 | * tomoyo_read_domain - Read domain policy. |
1573 | * |
1574 | * @head: Pointer to "struct tomoyo_io_buffer". |
1575 | * |
1576 | * Caller holds tomoyo_read_lock(). |
1577 | */ |
1578 | static void tomoyo_read_domain(struct tomoyo_io_buffer *head) |
1579 | { |
1580 | if (head->r.eof) |
1581 | return; |
1582 | list_for_each_cookie(head->r.domain, &tomoyo_domain_list) { |
1583 | struct tomoyo_domain_info *domain = |
1584 | list_entry(head->r.domain, typeof(*domain), list); |
1585 | switch (head->r.step) { |
1586 | u8 i; |
1587 | case 0: |
1588 | if (domain->is_deleted && |
1589 | !head->r.print_this_domain_only) |
1590 | continue; |
1591 | /* Print domainname and flags. */ |
1592 | tomoyo_set_string(head, domain->domainname->name); |
1593 | tomoyo_set_lf(head); |
1594 | tomoyo_io_printf(head, "use_profile %u\n", |
1595 | domain->profile); |
1596 | tomoyo_io_printf(head, "use_group %u\n", |
1597 | domain->group); |
1598 | for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++) |
1599 | if (domain->flags[i]) |
1600 | tomoyo_set_string(head, tomoyo_dif[i]); |
1601 | head->r.step++; |
1602 | tomoyo_set_lf(head); |
1603 | /* fall through */ |
1604 | case 1: |
1605 | if (!tomoyo_read_domain2(head, &domain->acl_info_list)) |
1606 | return; |
1607 | head->r.step++; |
1608 | if (!tomoyo_set_lf(head)) |
1609 | return; |
1610 | /* fall through */ |
1611 | case 2: |
1612 | head->r.step = 0; |
1613 | if (head->r.print_this_domain_only) |
1614 | goto done; |
1615 | } |
1616 | } |
1617 | done: |
1618 | head->r.eof = true; |
1619 | } |
1620 | |
1621 | /** |
1622 | * tomoyo_write_pid: Specify PID to obtain domainname. |
1623 | * |
1624 | * @head: Pointer to "struct tomoyo_io_buffer". |
1625 | * |
1626 | * Returns 0. |
1627 | */ |
1628 | static int tomoyo_write_pid(struct tomoyo_io_buffer *head) |
1629 | { |
1630 | head->r.eof = false; |
1631 | return 0; |
1632 | } |
1633 | |
1634 | /** |
1635 | * tomoyo_read_pid - Get domainname of the specified PID. |
1636 | * |
1637 | * @head: Pointer to "struct tomoyo_io_buffer". |
1638 | * |
1639 | * Returns the domainname which the specified PID is in on success, |
1640 | * empty string otherwise. |
1641 | * The PID is specified by tomoyo_write_pid() so that the user can obtain |
1642 | * using read()/write() interface rather than sysctl() interface. |
1643 | */ |
1644 | static void tomoyo_read_pid(struct tomoyo_io_buffer *head) |
1645 | { |
1646 | char *buf = head->write_buf; |
1647 | bool global_pid = false; |
1648 | unsigned int pid; |
1649 | struct task_struct *p; |
1650 | struct tomoyo_domain_info *domain = NULL; |
1651 | |
1652 | /* Accessing write_buf is safe because head->io_sem is held. */ |
1653 | if (!buf) { |
1654 | head->r.eof = true; |
1655 | return; /* Do nothing if open(O_RDONLY). */ |
1656 | } |
1657 | if (head->r.w_pos || head->r.eof) |
1658 | return; |
1659 | head->r.eof = true; |
1660 | if (tomoyo_str_starts(&buf, "global-pid ")) |
1661 | global_pid = true; |
1662 | pid = (unsigned int) simple_strtoul(buf, NULL, 10); |
1663 | rcu_read_lock(); |
1664 | if (global_pid) |
1665 | p = find_task_by_pid_ns(pid, &init_pid_ns); |
1666 | else |
1667 | p = find_task_by_vpid(pid); |
1668 | if (p) |
1669 | domain = tomoyo_real_domain(p); |
1670 | rcu_read_unlock(); |
1671 | if (!domain) |
1672 | return; |
1673 | tomoyo_io_printf(head, "%u %u ", pid, domain->profile); |
1674 | tomoyo_set_string(head, domain->domainname->name); |
1675 | } |
1676 | |
1677 | /* String table for domain transition control keywords. */ |
1678 | static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = { |
1679 | [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ", |
1680 | [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ", |
1681 | [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ", |
1682 | [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ", |
1683 | [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ", |
1684 | [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ", |
1685 | }; |
1686 | |
1687 | /* String table for grouping keywords. */ |
1688 | static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = { |
1689 | [TOMOYO_PATH_GROUP] = "path_group ", |
1690 | [TOMOYO_NUMBER_GROUP] = "number_group ", |
1691 | [TOMOYO_ADDRESS_GROUP] = "address_group ", |
1692 | }; |
1693 | |
1694 | /** |
1695 | * tomoyo_write_exception - Write exception policy. |
1696 | * |
1697 | * @head: Pointer to "struct tomoyo_io_buffer". |
1698 | * |
1699 | * Returns 0 on success, negative value otherwise. |
1700 | * |
1701 | * Caller holds tomoyo_read_lock(). |
1702 | */ |
1703 | static int tomoyo_write_exception(struct tomoyo_io_buffer *head) |
1704 | { |
1705 | const bool is_delete = head->w.is_delete; |
1706 | struct tomoyo_acl_param param = { |
1707 | .ns = head->w.ns, |
1708 | .is_delete = is_delete, |
1709 | .data = head->write_buf, |
1710 | }; |
1711 | u8 i; |
1712 | if (tomoyo_str_starts(¶m.data, "aggregator ")) |
1713 | return tomoyo_write_aggregator(¶m); |
1714 | for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++) |
1715 | if (tomoyo_str_starts(¶m.data, tomoyo_transition_type[i])) |
1716 | return tomoyo_write_transition_control(¶m, i); |
1717 | for (i = 0; i < TOMOYO_MAX_GROUP; i++) |
1718 | if (tomoyo_str_starts(¶m.data, tomoyo_group_name[i])) |
1719 | return tomoyo_write_group(¶m, i); |
1720 | if (tomoyo_str_starts(¶m.data, "acl_group ")) { |
1721 | unsigned int group; |
1722 | char *data; |
1723 | group = simple_strtoul(param.data, &data, 10); |
1724 | if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ') |
1725 | return tomoyo_write_domain2 |
1726 | (head->w.ns, &head->w.ns->acl_group[group], |
1727 | data, is_delete); |
1728 | } |
1729 | return -EINVAL; |
1730 | } |
1731 | |
1732 | /** |
1733 | * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list. |
1734 | * |
1735 | * @head: Pointer to "struct tomoyo_io_buffer". |
1736 | * @idx: Index number. |
1737 | * |
1738 | * Returns true on success, false otherwise. |
1739 | * |
1740 | * Caller holds tomoyo_read_lock(). |
1741 | */ |
1742 | static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx) |
1743 | { |
1744 | struct tomoyo_policy_namespace *ns = |
1745 | container_of(head->r.ns, typeof(*ns), namespace_list); |
1746 | struct list_head *list = &ns->group_list[idx]; |
1747 | list_for_each_cookie(head->r.group, list) { |
1748 | struct tomoyo_group *group = |
1749 | list_entry(head->r.group, typeof(*group), head.list); |
1750 | list_for_each_cookie(head->r.acl, &group->member_list) { |
1751 | struct tomoyo_acl_head *ptr = |
1752 | list_entry(head->r.acl, typeof(*ptr), list); |
1753 | if (ptr->is_deleted) |
1754 | continue; |
1755 | if (!tomoyo_flush(head)) |
1756 | return false; |
1757 | tomoyo_print_namespace(head); |
1758 | tomoyo_set_string(head, tomoyo_group_name[idx]); |
1759 | tomoyo_set_string(head, group->group_name->name); |
1760 | if (idx == TOMOYO_PATH_GROUP) { |
1761 | tomoyo_set_space(head); |
1762 | tomoyo_set_string(head, container_of |
1763 | (ptr, struct tomoyo_path_group, |
1764 | head)->member_name->name); |
1765 | } else if (idx == TOMOYO_NUMBER_GROUP) { |
1766 | tomoyo_print_number_union(head, &container_of |
1767 | (ptr, |
1768 | struct tomoyo_number_group, |
1769 | head)->number); |
1770 | } else if (idx == TOMOYO_ADDRESS_GROUP) { |
1771 | char buffer[128]; |
1772 | |
1773 | struct tomoyo_address_group *member = |
1774 | container_of(ptr, typeof(*member), |
1775 | head); |
1776 | tomoyo_print_ip(buffer, sizeof(buffer), |
1777 | &member->address); |
1778 | tomoyo_io_printf(head, " %s", buffer); |
1779 | } |
1780 | tomoyo_set_lf(head); |
1781 | } |
1782 | head->r.acl = NULL; |
1783 | } |
1784 | head->r.group = NULL; |
1785 | return true; |
1786 | } |
1787 | |
1788 | /** |
1789 | * tomoyo_read_policy - Read "struct tomoyo_..._entry" list. |
1790 | * |
1791 | * @head: Pointer to "struct tomoyo_io_buffer". |
1792 | * @idx: Index number. |
1793 | * |
1794 | * Returns true on success, false otherwise. |
1795 | * |
1796 | * Caller holds tomoyo_read_lock(). |
1797 | */ |
1798 | static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx) |
1799 | { |
1800 | struct tomoyo_policy_namespace *ns = |
1801 | container_of(head->r.ns, typeof(*ns), namespace_list); |
1802 | struct list_head *list = &ns->policy_list[idx]; |
1803 | list_for_each_cookie(head->r.acl, list) { |
1804 | struct tomoyo_acl_head *acl = |
1805 | container_of(head->r.acl, typeof(*acl), list); |
1806 | if (acl->is_deleted) |
1807 | continue; |
1808 | if (!tomoyo_flush(head)) |
1809 | return false; |
1810 | switch (idx) { |
1811 | case TOMOYO_ID_TRANSITION_CONTROL: |
1812 | { |
1813 | struct tomoyo_transition_control *ptr = |
1814 | container_of(acl, typeof(*ptr), head); |
1815 | tomoyo_print_namespace(head); |
1816 | tomoyo_set_string(head, tomoyo_transition_type |
1817 | [ptr->type]); |
1818 | tomoyo_set_string(head, ptr->program ? |
1819 | ptr->program->name : "any"); |
1820 | tomoyo_set_string(head, " from "); |
1821 | tomoyo_set_string(head, ptr->domainname ? |
1822 | ptr->domainname->name : |
1823 | "any"); |
1824 | } |
1825 | break; |
1826 | case TOMOYO_ID_AGGREGATOR: |
1827 | { |
1828 | struct tomoyo_aggregator *ptr = |
1829 | container_of(acl, typeof(*ptr), head); |
1830 | tomoyo_print_namespace(head); |
1831 | tomoyo_set_string(head, "aggregator "); |
1832 | tomoyo_set_string(head, |
1833 | ptr->original_name->name); |
1834 | tomoyo_set_space(head); |
1835 | tomoyo_set_string(head, |
1836 | ptr->aggregated_name->name); |
1837 | } |
1838 | break; |
1839 | default: |
1840 | continue; |
1841 | } |
1842 | tomoyo_set_lf(head); |
1843 | } |
1844 | head->r.acl = NULL; |
1845 | return true; |
1846 | } |
1847 | |
1848 | /** |
1849 | * tomoyo_read_exception - Read exception policy. |
1850 | * |
1851 | * @head: Pointer to "struct tomoyo_io_buffer". |
1852 | * |
1853 | * Caller holds tomoyo_read_lock(). |
1854 | */ |
1855 | static void tomoyo_read_exception(struct tomoyo_io_buffer *head) |
1856 | { |
1857 | struct tomoyo_policy_namespace *ns = |
1858 | container_of(head->r.ns, typeof(*ns), namespace_list); |
1859 | if (head->r.eof) |
1860 | return; |
1861 | while (head->r.step < TOMOYO_MAX_POLICY && |
1862 | tomoyo_read_policy(head, head->r.step)) |
1863 | head->r.step++; |
1864 | if (head->r.step < TOMOYO_MAX_POLICY) |
1865 | return; |
1866 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP && |
1867 | tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY)) |
1868 | head->r.step++; |
1869 | if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP) |
1870 | return; |
1871 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP |
1872 | + TOMOYO_MAX_ACL_GROUPS) { |
1873 | head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY |
1874 | - TOMOYO_MAX_GROUP; |
1875 | if (!tomoyo_read_domain2(head, &ns->acl_group |
1876 | [head->r.acl_group_index])) |
1877 | return; |
1878 | head->r.step++; |
1879 | } |
1880 | head->r.eof = true; |
1881 | } |
1882 | |
1883 | /* Wait queue for kernel -> userspace notification. */ |
1884 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait); |
1885 | /* Wait queue for userspace -> kernel notification. */ |
1886 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait); |
1887 | |
1888 | /* Structure for query. */ |
1889 | struct tomoyo_query { |
1890 | struct list_head list; |
1891 | struct tomoyo_domain_info *domain; |
1892 | char *query; |
1893 | size_t query_len; |
1894 | unsigned int serial; |
1895 | u8 timer; |
1896 | u8 answer; |
1897 | u8 retry; |
1898 | }; |
1899 | |
1900 | /* The list for "struct tomoyo_query". */ |
1901 | static LIST_HEAD(tomoyo_query_list); |
1902 | |
1903 | /* Lock for manipulating tomoyo_query_list. */ |
1904 | static DEFINE_SPINLOCK(tomoyo_query_list_lock); |
1905 | |
1906 | /* |
1907 | * Number of "struct file" referring /sys/kernel/security/tomoyo/query |
1908 | * interface. |
1909 | */ |
1910 | static atomic_t tomoyo_query_observers = ATOMIC_INIT(0); |
1911 | |
1912 | /** |
1913 | * tomoyo_truncate - Truncate a line. |
1914 | * |
1915 | * @str: String to truncate. |
1916 | * |
1917 | * Returns length of truncated @str. |
1918 | */ |
1919 | static int tomoyo_truncate(char *str) |
1920 | { |
1921 | char *start = str; |
1922 | while (*(unsigned char *) str > (unsigned char) ' ') |
1923 | str++; |
1924 | *str = '\0'; |
1925 | return strlen(start) + 1; |
1926 | } |
1927 | |
1928 | /** |
1929 | * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode. |
1930 | * |
1931 | * @domain: Pointer to "struct tomoyo_domain_info". |
1932 | * @header: Lines containing ACL. |
1933 | * |
1934 | * Returns nothing. |
1935 | */ |
1936 | static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header) |
1937 | { |
1938 | char *buffer; |
1939 | char *realpath = NULL; |
1940 | char *argv0 = NULL; |
1941 | char *symlink = NULL; |
1942 | char *cp = strchr(header, '\n'); |
1943 | int len; |
1944 | if (!cp) |
1945 | return; |
1946 | cp = strchr(cp + 1, '\n'); |
1947 | if (!cp) |
1948 | return; |
1949 | *cp++ = '\0'; |
1950 | len = strlen(cp) + 1; |
1951 | /* strstr() will return NULL if ordering is wrong. */ |
1952 | if (*cp == 'f') { |
1953 | argv0 = strstr(header, " argv[]={ \""); |
1954 | if (argv0) { |
1955 | argv0 += 10; |
1956 | len += tomoyo_truncate(argv0) + 14; |
1957 | } |
1958 | realpath = strstr(header, " exec={ realpath=\""); |
1959 | if (realpath) { |
1960 | realpath += 8; |
1961 | len += tomoyo_truncate(realpath) + 6; |
1962 | } |
1963 | symlink = strstr(header, " symlink.target=\""); |
1964 | if (symlink) |
1965 | len += tomoyo_truncate(symlink + 1) + 1; |
1966 | } |
1967 | buffer = kmalloc(len, GFP_NOFS); |
1968 | if (!buffer) |
1969 | return; |
1970 | snprintf(buffer, len - 1, "%s", cp); |
1971 | if (realpath) |
1972 | tomoyo_addprintf(buffer, len, " exec.%s", realpath); |
1973 | if (argv0) |
1974 | tomoyo_addprintf(buffer, len, " exec.argv[0]=%s", argv0); |
1975 | if (symlink) |
1976 | tomoyo_addprintf(buffer, len, "%s", symlink); |
1977 | tomoyo_normalize_line(buffer); |
1978 | if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer, |
1979 | false)) |
1980 | tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES); |
1981 | kfree(buffer); |
1982 | } |
1983 | |
1984 | /** |
1985 | * tomoyo_supervisor - Ask for the supervisor's decision. |
1986 | * |
1987 | * @r: Pointer to "struct tomoyo_request_info". |
1988 | * @fmt: The printf()'s format string, followed by parameters. |
1989 | * |
1990 | * Returns 0 if the supervisor decided to permit the access request which |
1991 | * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the |
1992 | * supervisor decided to retry the access request which violated the policy in |
1993 | * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise. |
1994 | */ |
1995 | int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...) |
1996 | { |
1997 | va_list args; |
1998 | int error; |
1999 | int len; |
2000 | static unsigned int tomoyo_serial; |
2001 | struct tomoyo_query entry = { }; |
2002 | bool quota_exceeded = false; |
2003 | va_start(args, fmt); |
2004 | len = vsnprintf((char *) &len, 1, fmt, args) + 1; |
2005 | va_end(args); |
2006 | /* Write /sys/kernel/security/tomoyo/audit. */ |
2007 | va_start(args, fmt); |
2008 | tomoyo_write_log2(r, len, fmt, args); |
2009 | va_end(args); |
2010 | /* Nothing more to do if granted. */ |
2011 | if (r->granted) |
2012 | return 0; |
2013 | if (r->mode) |
2014 | tomoyo_update_stat(r->mode); |
2015 | switch (r->mode) { |
2016 | case TOMOYO_CONFIG_ENFORCING: |
2017 | error = -EPERM; |
2018 | if (atomic_read(&tomoyo_query_observers)) |
2019 | break; |
2020 | goto out; |
2021 | case TOMOYO_CONFIG_LEARNING: |
2022 | error = 0; |
2023 | /* Check max_learning_entry parameter. */ |
2024 | if (tomoyo_domain_quota_is_ok(r)) |
2025 | break; |
2026 | /* fall through */ |
2027 | default: |
2028 | return 0; |
2029 | } |
2030 | /* Get message. */ |
2031 | va_start(args, fmt); |
2032 | entry.query = tomoyo_init_log(r, len, fmt, args); |
2033 | va_end(args); |
2034 | if (!entry.query) |
2035 | goto out; |
2036 | entry.query_len = strlen(entry.query) + 1; |
2037 | if (!error) { |
2038 | tomoyo_add_entry(r->domain, entry.query); |
2039 | goto out; |
2040 | } |
2041 | len = tomoyo_round2(entry.query_len); |
2042 | entry.domain = r->domain; |
2043 | spin_lock(&tomoyo_query_list_lock); |
2044 | if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] && |
2045 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len |
2046 | >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) { |
2047 | quota_exceeded = true; |
2048 | } else { |
2049 | entry.serial = tomoyo_serial++; |
2050 | entry.retry = r->retry; |
2051 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len; |
2052 | list_add_tail(&entry.list, &tomoyo_query_list); |
2053 | } |
2054 | spin_unlock(&tomoyo_query_list_lock); |
2055 | if (quota_exceeded) |
2056 | goto out; |
2057 | /* Give 10 seconds for supervisor's opinion. */ |
2058 | while (entry.timer < 10) { |
2059 | wake_up_all(&tomoyo_query_wait); |
2060 | if (wait_event_interruptible_timeout |
2061 | (tomoyo_answer_wait, entry.answer || |
2062 | !atomic_read(&tomoyo_query_observers), HZ)) |
2063 | break; |
2064 | else |
2065 | entry.timer++; |
2066 | } |
2067 | spin_lock(&tomoyo_query_list_lock); |
2068 | list_del(&entry.list); |
2069 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len; |
2070 | spin_unlock(&tomoyo_query_list_lock); |
2071 | switch (entry.answer) { |
2072 | case 3: /* Asked to retry by administrator. */ |
2073 | error = TOMOYO_RETRY_REQUEST; |
2074 | r->retry++; |
2075 | break; |
2076 | case 1: |
2077 | /* Granted by administrator. */ |
2078 | error = 0; |
2079 | break; |
2080 | default: |
2081 | /* Timed out or rejected by administrator. */ |
2082 | break; |
2083 | } |
2084 | out: |
2085 | kfree(entry.query); |
2086 | return error; |
2087 | } |
2088 | |
2089 | /** |
2090 | * tomoyo_find_domain_by_qid - Get domain by query id. |
2091 | * |
2092 | * @serial: Query ID assigned by tomoyo_supervisor(). |
2093 | * |
2094 | * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise. |
2095 | */ |
2096 | static struct tomoyo_domain_info *tomoyo_find_domain_by_qid |
2097 | (unsigned int serial) |
2098 | { |
2099 | struct tomoyo_query *ptr; |
2100 | struct tomoyo_domain_info *domain = NULL; |
2101 | spin_lock(&tomoyo_query_list_lock); |
2102 | list_for_each_entry(ptr, &tomoyo_query_list, list) { |
2103 | if (ptr->serial != serial) |
2104 | continue; |
2105 | domain = ptr->domain; |
2106 | break; |
2107 | } |
2108 | spin_unlock(&tomoyo_query_list_lock); |
2109 | return domain; |
2110 | } |
2111 | |
2112 | /** |
2113 | * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query. |
2114 | * |
2115 | * @file: Pointer to "struct file". |
2116 | * @wait: Pointer to "poll_table". |
2117 | * |
2118 | * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise. |
2119 | * |
2120 | * Waits for access requests which violated policy in enforcing mode. |
2121 | */ |
2122 | static unsigned int tomoyo_poll_query(struct file *file, poll_table *wait) |
2123 | { |
2124 | if (!list_empty(&tomoyo_query_list)) |
2125 | return POLLIN | POLLRDNORM; |
2126 | poll_wait(file, &tomoyo_query_wait, wait); |
2127 | if (!list_empty(&tomoyo_query_list)) |
2128 | return POLLIN | POLLRDNORM; |
2129 | return 0; |
2130 | } |
2131 | |
2132 | /** |
2133 | * tomoyo_read_query - Read access requests which violated policy in enforcing mode. |
2134 | * |
2135 | * @head: Pointer to "struct tomoyo_io_buffer". |
2136 | */ |
2137 | static void tomoyo_read_query(struct tomoyo_io_buffer *head) |
2138 | { |
2139 | struct list_head *tmp; |
2140 | unsigned int pos = 0; |
2141 | size_t len = 0; |
2142 | char *buf; |
2143 | if (head->r.w_pos) |
2144 | return; |
2145 | if (head->read_buf) { |
2146 | kfree(head->read_buf); |
2147 | head->read_buf = NULL; |
2148 | } |
2149 | spin_lock(&tomoyo_query_list_lock); |
2150 | list_for_each(tmp, &tomoyo_query_list) { |
2151 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
2152 | if (pos++ != head->r.query_index) |
2153 | continue; |
2154 | len = ptr->query_len; |
2155 | break; |
2156 | } |
2157 | spin_unlock(&tomoyo_query_list_lock); |
2158 | if (!len) { |
2159 | head->r.query_index = 0; |
2160 | return; |
2161 | } |
2162 | buf = kzalloc(len + 32, GFP_NOFS); |
2163 | if (!buf) |
2164 | return; |
2165 | pos = 0; |
2166 | spin_lock(&tomoyo_query_list_lock); |
2167 | list_for_each(tmp, &tomoyo_query_list) { |
2168 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
2169 | if (pos++ != head->r.query_index) |
2170 | continue; |
2171 | /* |
2172 | * Some query can be skipped because tomoyo_query_list |
2173 | * can change, but I don't care. |
2174 | */ |
2175 | if (len == ptr->query_len) |
2176 | snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial, |
2177 | ptr->retry, ptr->query); |
2178 | break; |
2179 | } |
2180 | spin_unlock(&tomoyo_query_list_lock); |
2181 | if (buf[0]) { |
2182 | head->read_buf = buf; |
2183 | head->r.w[head->r.w_pos++] = buf; |
2184 | head->r.query_index++; |
2185 | } else { |
2186 | kfree(buf); |
2187 | } |
2188 | } |
2189 | |
2190 | /** |
2191 | * tomoyo_write_answer - Write the supervisor's decision. |
2192 | * |
2193 | * @head: Pointer to "struct tomoyo_io_buffer". |
2194 | * |
2195 | * Returns 0 on success, -EINVAL otherwise. |
2196 | */ |
2197 | static int tomoyo_write_answer(struct tomoyo_io_buffer *head) |
2198 | { |
2199 | char *data = head->write_buf; |
2200 | struct list_head *tmp; |
2201 | unsigned int serial; |
2202 | unsigned int answer; |
2203 | spin_lock(&tomoyo_query_list_lock); |
2204 | list_for_each(tmp, &tomoyo_query_list) { |
2205 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
2206 | ptr->timer = 0; |
2207 | } |
2208 | spin_unlock(&tomoyo_query_list_lock); |
2209 | if (sscanf(data, "A%u=%u", &serial, &answer) != 2) |
2210 | return -EINVAL; |
2211 | spin_lock(&tomoyo_query_list_lock); |
2212 | list_for_each(tmp, &tomoyo_query_list) { |
2213 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
2214 | if (ptr->serial != serial) |
2215 | continue; |
2216 | ptr->answer = answer; |
2217 | /* Remove from tomoyo_query_list. */ |
2218 | if (ptr->answer) |
2219 | list_del_init(&ptr->list); |
2220 | break; |
2221 | } |
2222 | spin_unlock(&tomoyo_query_list_lock); |
2223 | return 0; |
2224 | } |
2225 | |
2226 | /** |
2227 | * tomoyo_read_version: Get version. |
2228 | * |
2229 | * @head: Pointer to "struct tomoyo_io_buffer". |
2230 | * |
2231 | * Returns version information. |
2232 | */ |
2233 | static void tomoyo_read_version(struct tomoyo_io_buffer *head) |
2234 | { |
2235 | if (!head->r.eof) { |
2236 | tomoyo_io_printf(head, "2.5.0"); |
2237 | head->r.eof = true; |
2238 | } |
2239 | } |
2240 | |
2241 | /* String table for /sys/kernel/security/tomoyo/stat interface. */ |
2242 | static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = { |
2243 | [TOMOYO_STAT_POLICY_UPDATES] = "update:", |
2244 | [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:", |
2245 | [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:", |
2246 | [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:", |
2247 | }; |
2248 | |
2249 | /* String table for /sys/kernel/security/tomoyo/stat interface. */ |
2250 | static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = { |
2251 | [TOMOYO_MEMORY_POLICY] = "policy:", |
2252 | [TOMOYO_MEMORY_AUDIT] = "audit log:", |
2253 | [TOMOYO_MEMORY_QUERY] = "query message:", |
2254 | }; |
2255 | |
2256 | /* Timestamp counter for last updated. */ |
2257 | static unsigned int tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT]; |
2258 | /* Counter for number of updates. */ |
2259 | static unsigned int tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT]; |
2260 | |
2261 | /** |
2262 | * tomoyo_update_stat - Update statistic counters. |
2263 | * |
2264 | * @index: Index for policy type. |
2265 | * |
2266 | * Returns nothing. |
2267 | */ |
2268 | void tomoyo_update_stat(const u8 index) |
2269 | { |
2270 | struct timeval tv; |
2271 | do_gettimeofday(&tv); |
2272 | /* |
2273 | * I don't use atomic operations because race condition is not fatal. |
2274 | */ |
2275 | tomoyo_stat_updated[index]++; |
2276 | tomoyo_stat_modified[index] = tv.tv_sec; |
2277 | } |
2278 | |
2279 | /** |
2280 | * tomoyo_read_stat - Read statistic data. |
2281 | * |
2282 | * @head: Pointer to "struct tomoyo_io_buffer". |
2283 | * |
2284 | * Returns nothing. |
2285 | */ |
2286 | static void tomoyo_read_stat(struct tomoyo_io_buffer *head) |
2287 | { |
2288 | u8 i; |
2289 | unsigned int total = 0; |
2290 | if (head->r.eof) |
2291 | return; |
2292 | for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) { |
2293 | tomoyo_io_printf(head, "Policy %-30s %10u", |
2294 | tomoyo_policy_headers[i], |
2295 | tomoyo_stat_updated[i]); |
2296 | if (tomoyo_stat_modified[i]) { |
2297 | struct tomoyo_time stamp; |
2298 | tomoyo_convert_time(tomoyo_stat_modified[i], &stamp); |
2299 | tomoyo_io_printf(head, " (Last: %04u/%02u/%02u " |
2300 | "%02u:%02u:%02u)", |
2301 | stamp.year, stamp.month, stamp.day, |
2302 | stamp.hour, stamp.min, stamp.sec); |
2303 | } |
2304 | tomoyo_set_lf(head); |
2305 | } |
2306 | for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) { |
2307 | unsigned int used = tomoyo_memory_used[i]; |
2308 | total += used; |
2309 | tomoyo_io_printf(head, "Memory used by %-22s %10u", |
2310 | tomoyo_memory_headers[i], used); |
2311 | used = tomoyo_memory_quota[i]; |
2312 | if (used) |
2313 | tomoyo_io_printf(head, " (Quota: %10u)", used); |
2314 | tomoyo_set_lf(head); |
2315 | } |
2316 | tomoyo_io_printf(head, "Total memory used: %10u\n", |
2317 | total); |
2318 | head->r.eof = true; |
2319 | } |
2320 | |
2321 | /** |
2322 | * tomoyo_write_stat - Set memory quota. |
2323 | * |
2324 | * @head: Pointer to "struct tomoyo_io_buffer". |
2325 | * |
2326 | * Returns 0. |
2327 | */ |
2328 | static int tomoyo_write_stat(struct tomoyo_io_buffer *head) |
2329 | { |
2330 | char *data = head->write_buf; |
2331 | u8 i; |
2332 | if (tomoyo_str_starts(&data, "Memory used by ")) |
2333 | for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) |
2334 | if (tomoyo_str_starts(&data, tomoyo_memory_headers[i])) |
2335 | sscanf(data, "%u", &tomoyo_memory_quota[i]); |
2336 | return 0; |
2337 | } |
2338 | |
2339 | /** |
2340 | * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface. |
2341 | * |
2342 | * @type: Type of interface. |
2343 | * @file: Pointer to "struct file". |
2344 | * |
2345 | * Returns 0 on success, negative value otherwise. |
2346 | */ |
2347 | int tomoyo_open_control(const u8 type, struct file *file) |
2348 | { |
2349 | struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS); |
2350 | |
2351 | if (!head) |
2352 | return -ENOMEM; |
2353 | mutex_init(&head->io_sem); |
2354 | head->type = type; |
2355 | switch (type) { |
2356 | case TOMOYO_DOMAINPOLICY: |
2357 | /* /sys/kernel/security/tomoyo/domain_policy */ |
2358 | head->write = tomoyo_write_domain; |
2359 | head->read = tomoyo_read_domain; |
2360 | break; |
2361 | case TOMOYO_EXCEPTIONPOLICY: |
2362 | /* /sys/kernel/security/tomoyo/exception_policy */ |
2363 | head->write = tomoyo_write_exception; |
2364 | head->read = tomoyo_read_exception; |
2365 | break; |
2366 | case TOMOYO_AUDIT: |
2367 | /* /sys/kernel/security/tomoyo/audit */ |
2368 | head->poll = tomoyo_poll_log; |
2369 | head->read = tomoyo_read_log; |
2370 | break; |
2371 | case TOMOYO_PROCESS_STATUS: |
2372 | /* /sys/kernel/security/tomoyo/.process_status */ |
2373 | head->write = tomoyo_write_pid; |
2374 | head->read = tomoyo_read_pid; |
2375 | break; |
2376 | case TOMOYO_VERSION: |
2377 | /* /sys/kernel/security/tomoyo/version */ |
2378 | head->read = tomoyo_read_version; |
2379 | head->readbuf_size = 128; |
2380 | break; |
2381 | case TOMOYO_STAT: |
2382 | /* /sys/kernel/security/tomoyo/stat */ |
2383 | head->write = tomoyo_write_stat; |
2384 | head->read = tomoyo_read_stat; |
2385 | head->readbuf_size = 1024; |
2386 | break; |
2387 | case TOMOYO_PROFILE: |
2388 | /* /sys/kernel/security/tomoyo/profile */ |
2389 | head->write = tomoyo_write_profile; |
2390 | head->read = tomoyo_read_profile; |
2391 | break; |
2392 | case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */ |
2393 | head->poll = tomoyo_poll_query; |
2394 | head->write = tomoyo_write_answer; |
2395 | head->read = tomoyo_read_query; |
2396 | break; |
2397 | case TOMOYO_MANAGER: |
2398 | /* /sys/kernel/security/tomoyo/manager */ |
2399 | head->write = tomoyo_write_manager; |
2400 | head->read = tomoyo_read_manager; |
2401 | break; |
2402 | } |
2403 | if (!(file->f_mode & FMODE_READ)) { |
2404 | /* |
2405 | * No need to allocate read_buf since it is not opened |
2406 | * for reading. |
2407 | */ |
2408 | head->read = NULL; |
2409 | head->poll = NULL; |
2410 | } else if (!head->poll) { |
2411 | /* Don't allocate read_buf for poll() access. */ |
2412 | if (!head->readbuf_size) |
2413 | head->readbuf_size = 4096 * 2; |
2414 | head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS); |
2415 | if (!head->read_buf) { |
2416 | kfree(head); |
2417 | return -ENOMEM; |
2418 | } |
2419 | } |
2420 | if (!(file->f_mode & FMODE_WRITE)) { |
2421 | /* |
2422 | * No need to allocate write_buf since it is not opened |
2423 | * for writing. |
2424 | */ |
2425 | head->write = NULL; |
2426 | } else if (head->write) { |
2427 | head->writebuf_size = 4096 * 2; |
2428 | head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS); |
2429 | if (!head->write_buf) { |
2430 | kfree(head->read_buf); |
2431 | kfree(head); |
2432 | return -ENOMEM; |
2433 | } |
2434 | } |
2435 | /* |
2436 | * If the file is /sys/kernel/security/tomoyo/query , increment the |
2437 | * observer counter. |
2438 | * The obserber counter is used by tomoyo_supervisor() to see if |
2439 | * there is some process monitoring /sys/kernel/security/tomoyo/query. |
2440 | */ |
2441 | if (type == TOMOYO_QUERY) |
2442 | atomic_inc(&tomoyo_query_observers); |
2443 | file->private_data = head; |
2444 | tomoyo_notify_gc(head, true); |
2445 | return 0; |
2446 | } |
2447 | |
2448 | /** |
2449 | * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface. |
2450 | * |
2451 | * @file: Pointer to "struct file". |
2452 | * @wait: Pointer to "poll_table". Maybe NULL. |
2453 | * |
2454 | * Returns POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM if ready to read/write, |
2455 | * POLLOUT | POLLWRNORM otherwise. |
2456 | */ |
2457 | unsigned int tomoyo_poll_control(struct file *file, poll_table *wait) |
2458 | { |
2459 | struct tomoyo_io_buffer *head = file->private_data; |
2460 | if (head->poll) |
2461 | return head->poll(file, wait) | POLLOUT | POLLWRNORM; |
2462 | return POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM; |
2463 | } |
2464 | |
2465 | /** |
2466 | * tomoyo_set_namespace_cursor - Set namespace to read. |
2467 | * |
2468 | * @head: Pointer to "struct tomoyo_io_buffer". |
2469 | * |
2470 | * Returns nothing. |
2471 | */ |
2472 | static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head) |
2473 | { |
2474 | struct list_head *ns; |
2475 | if (head->type != TOMOYO_EXCEPTIONPOLICY && |
2476 | head->type != TOMOYO_PROFILE) |
2477 | return; |
2478 | /* |
2479 | * If this is the first read, or reading previous namespace finished |
2480 | * and has more namespaces to read, update the namespace cursor. |
2481 | */ |
2482 | ns = head->r.ns; |
2483 | if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) { |
2484 | /* Clearing is OK because tomoyo_flush() returned true. */ |
2485 | memset(&head->r, 0, sizeof(head->r)); |
2486 | head->r.ns = ns ? ns->next : tomoyo_namespace_list.next; |
2487 | } |
2488 | } |
2489 | |
2490 | /** |
2491 | * tomoyo_has_more_namespace - Check for unread namespaces. |
2492 | * |
2493 | * @head: Pointer to "struct tomoyo_io_buffer". |
2494 | * |
2495 | * Returns true if we have more entries to print, false otherwise. |
2496 | */ |
2497 | static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head) |
2498 | { |
2499 | return (head->type == TOMOYO_EXCEPTIONPOLICY || |
2500 | head->type == TOMOYO_PROFILE) && head->r.eof && |
2501 | head->r.ns->next != &tomoyo_namespace_list; |
2502 | } |
2503 | |
2504 | /** |
2505 | * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface. |
2506 | * |
2507 | * @head: Pointer to "struct tomoyo_io_buffer". |
2508 | * @buffer: Poiner to buffer to write to. |
2509 | * @buffer_len: Size of @buffer. |
2510 | * |
2511 | * Returns bytes read on success, negative value otherwise. |
2512 | */ |
2513 | ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer, |
2514 | const int buffer_len) |
2515 | { |
2516 | int len; |
2517 | int idx; |
2518 | |
2519 | if (!head->read) |
2520 | return -ENOSYS; |
2521 | if (mutex_lock_interruptible(&head->io_sem)) |
2522 | return -EINTR; |
2523 | head->read_user_buf = buffer; |
2524 | head->read_user_buf_avail = buffer_len; |
2525 | idx = tomoyo_read_lock(); |
2526 | if (tomoyo_flush(head)) |
2527 | /* Call the policy handler. */ |
2528 | do { |
2529 | tomoyo_set_namespace_cursor(head); |
2530 | head->read(head); |
2531 | } while (tomoyo_flush(head) && |
2532 | tomoyo_has_more_namespace(head)); |
2533 | tomoyo_read_unlock(idx); |
2534 | len = head->read_user_buf - buffer; |
2535 | mutex_unlock(&head->io_sem); |
2536 | return len; |
2537 | } |
2538 | |
2539 | /** |
2540 | * tomoyo_parse_policy - Parse a policy line. |
2541 | * |
2542 | * @head: Poiter to "struct tomoyo_io_buffer". |
2543 | * @line: Line to parse. |
2544 | * |
2545 | * Returns 0 on success, negative value otherwise. |
2546 | * |
2547 | * Caller holds tomoyo_read_lock(). |
2548 | */ |
2549 | static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line) |
2550 | { |
2551 | /* Delete request? */ |
2552 | head->w.is_delete = !strncmp(line, "delete ", 7); |
2553 | if (head->w.is_delete) |
2554 | memmove(line, line + 7, strlen(line + 7) + 1); |
2555 | /* Selecting namespace to update. */ |
2556 | if (head->type == TOMOYO_EXCEPTIONPOLICY || |
2557 | head->type == TOMOYO_PROFILE) { |
2558 | if (*line == '<') { |
2559 | char *cp = strchr(line, ' '); |
2560 | if (cp) { |
2561 | *cp++ = '\0'; |
2562 | head->w.ns = tomoyo_assign_namespace(line); |
2563 | memmove(line, cp, strlen(cp) + 1); |
2564 | } else |
2565 | head->w.ns = NULL; |
2566 | } else |
2567 | head->w.ns = &tomoyo_kernel_namespace; |
2568 | /* Don't allow updating if namespace is invalid. */ |
2569 | if (!head->w.ns) |
2570 | return -ENOENT; |
2571 | } |
2572 | /* Do the update. */ |
2573 | return head->write(head); |
2574 | } |
2575 | |
2576 | /** |
2577 | * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface. |
2578 | * |
2579 | * @head: Pointer to "struct tomoyo_io_buffer". |
2580 | * @buffer: Pointer to buffer to read from. |
2581 | * @buffer_len: Size of @buffer. |
2582 | * |
2583 | * Returns @buffer_len on success, negative value otherwise. |
2584 | */ |
2585 | ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head, |
2586 | const char __user *buffer, const int buffer_len) |
2587 | { |
2588 | int error = buffer_len; |
2589 | size_t avail_len = buffer_len; |
2590 | char *cp0 = head->write_buf; |
2591 | int idx; |
2592 | if (!head->write) |
2593 | return -ENOSYS; |
2594 | if (!access_ok(VERIFY_READ, buffer, buffer_len)) |
2595 | return -EFAULT; |
2596 | if (mutex_lock_interruptible(&head->io_sem)) |
2597 | return -EINTR; |
2598 | head->read_user_buf_avail = 0; |
2599 | idx = tomoyo_read_lock(); |
2600 | /* Read a line and dispatch it to the policy handler. */ |
2601 | while (avail_len > 0) { |
2602 | char c; |
2603 | if (head->w.avail >= head->writebuf_size - 1) { |
2604 | const int len = head->writebuf_size * 2; |
2605 | char *cp = kzalloc(len, GFP_NOFS); |
2606 | if (!cp) { |
2607 | error = -ENOMEM; |
2608 | break; |
2609 | } |
2610 | memmove(cp, cp0, head->w.avail); |
2611 | kfree(cp0); |
2612 | head->write_buf = cp; |
2613 | cp0 = cp; |
2614 | head->writebuf_size = len; |
2615 | } |
2616 | if (get_user(c, buffer)) { |
2617 | error = -EFAULT; |
2618 | break; |
2619 | } |
2620 | buffer++; |
2621 | avail_len--; |
2622 | cp0[head->w.avail++] = c; |
2623 | if (c != '\n') |
2624 | continue; |
2625 | cp0[head->w.avail - 1] = '\0'; |
2626 | head->w.avail = 0; |
2627 | tomoyo_normalize_line(cp0); |
2628 | if (!strcmp(cp0, "reset")) { |
2629 | head->w.ns = &tomoyo_kernel_namespace; |
2630 | head->w.domain = NULL; |
2631 | memset(&head->r, 0, sizeof(head->r)); |
2632 | continue; |
2633 | } |
2634 | /* Don't allow updating policies by non manager programs. */ |
2635 | switch (head->type) { |
2636 | case TOMOYO_PROCESS_STATUS: |
2637 | /* This does not write anything. */ |
2638 | break; |
2639 | case TOMOYO_DOMAINPOLICY: |
2640 | if (tomoyo_select_domain(head, cp0)) |
2641 | continue; |
2642 | /* fall through */ |
2643 | case TOMOYO_EXCEPTIONPOLICY: |
2644 | if (!strcmp(cp0, "select transition_only")) { |
2645 | head->r.print_transition_related_only = true; |
2646 | continue; |
2647 | } |
2648 | /* fall through */ |
2649 | default: |
2650 | if (!tomoyo_manager()) { |
2651 | error = -EPERM; |
2652 | goto out; |
2653 | } |
2654 | } |
2655 | switch (tomoyo_parse_policy(head, cp0)) { |
2656 | case -EPERM: |
2657 | error = -EPERM; |
2658 | goto out; |
2659 | case 0: |
2660 | switch (head->type) { |
2661 | case TOMOYO_DOMAINPOLICY: |
2662 | case TOMOYO_EXCEPTIONPOLICY: |
2663 | case TOMOYO_STAT: |
2664 | case TOMOYO_PROFILE: |
2665 | case TOMOYO_MANAGER: |
2666 | tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES); |
2667 | break; |
2668 | default: |
2669 | break; |
2670 | } |
2671 | break; |
2672 | } |
2673 | } |
2674 | out: |
2675 | tomoyo_read_unlock(idx); |
2676 | mutex_unlock(&head->io_sem); |
2677 | return error; |
2678 | } |
2679 | |
2680 | /** |
2681 | * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface. |
2682 | * |
2683 | * @head: Pointer to "struct tomoyo_io_buffer". |
2684 | */ |
2685 | void tomoyo_close_control(struct tomoyo_io_buffer *head) |
2686 | { |
2687 | /* |
2688 | * If the file is /sys/kernel/security/tomoyo/query , decrement the |
2689 | * observer counter. |
2690 | */ |
2691 | if (head->type == TOMOYO_QUERY && |
2692 | atomic_dec_and_test(&tomoyo_query_observers)) |
2693 | wake_up_all(&tomoyo_answer_wait); |
2694 | tomoyo_notify_gc(head, false); |
2695 | } |
2696 | |
2697 | /** |
2698 | * tomoyo_check_profile - Check all profiles currently assigned to domains are defined. |
2699 | */ |
2700 | void tomoyo_check_profile(void) |
2701 | { |
2702 | struct tomoyo_domain_info *domain; |
2703 | const int idx = tomoyo_read_lock(); |
2704 | tomoyo_policy_loaded = true; |
2705 | printk(KERN_INFO "TOMOYO: 2.5.0\n"); |
2706 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
2707 | const u8 profile = domain->profile; |
2708 | const struct tomoyo_policy_namespace *ns = domain->ns; |
2709 | if (ns->profile_version != 20110903) |
2710 | printk(KERN_ERR |
2711 | "Profile version %u is not supported.\n", |
2712 | ns->profile_version); |
2713 | else if (!ns->profile_ptr[profile]) |
2714 | printk(KERN_ERR |
2715 | "Profile %u (used by '%s') is not defined.\n", |
2716 | profile, domain->domainname->name); |
2717 | else |
2718 | continue; |
2719 | printk(KERN_ERR |
2720 | "Userland tools for TOMOYO 2.5 must be installed and " |
2721 | "policy must be initialized.\n"); |
2722 | printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/2.5/ " |
2723 | "for more information.\n"); |
2724 | panic("STOP!"); |
2725 | } |
2726 | tomoyo_read_unlock(idx); |
2727 | printk(KERN_INFO "Mandatory Access Control activated.\n"); |
2728 | } |
2729 | |
2730 | /** |
2731 | * tomoyo_load_builtin_policy - Load built-in policy. |
2732 | * |
2733 | * Returns nothing. |
2734 | */ |
2735 | void __init tomoyo_load_builtin_policy(void) |
2736 | { |
2737 | /* |
2738 | * This include file is manually created and contains built-in policy |
2739 | * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy", |
2740 | * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager", |
2741 | * "tomoyo_builtin_stat" in the form of "static char [] __initdata". |
2742 | */ |
2743 | #include "builtin-policy.h" |
2744 | u8 i; |
2745 | const int idx = tomoyo_read_lock(); |
2746 | for (i = 0; i < 5; i++) { |
2747 | struct tomoyo_io_buffer head = { }; |
2748 | char *start = ""; |
2749 | switch (i) { |
2750 | case 0: |
2751 | start = tomoyo_builtin_profile; |
2752 | head.type = TOMOYO_PROFILE; |
2753 | head.write = tomoyo_write_profile; |
2754 | break; |
2755 | case 1: |
2756 | start = tomoyo_builtin_exception_policy; |
2757 | head.type = TOMOYO_EXCEPTIONPOLICY; |
2758 | head.write = tomoyo_write_exception; |
2759 | break; |
2760 | case 2: |
2761 | start = tomoyo_builtin_domain_policy; |
2762 | head.type = TOMOYO_DOMAINPOLICY; |
2763 | head.write = tomoyo_write_domain; |
2764 | break; |
2765 | case 3: |
2766 | start = tomoyo_builtin_manager; |
2767 | head.type = TOMOYO_MANAGER; |
2768 | head.write = tomoyo_write_manager; |
2769 | break; |
2770 | case 4: |
2771 | start = tomoyo_builtin_stat; |
2772 | head.type = TOMOYO_STAT; |
2773 | head.write = tomoyo_write_stat; |
2774 | break; |
2775 | } |
2776 | while (1) { |
2777 | char *end = strchr(start, '\n'); |
2778 | if (!end) |
2779 | break; |
2780 | *end = '\0'; |
2781 | tomoyo_normalize_line(start); |
2782 | head.write_buf = start; |
2783 | tomoyo_parse_policy(&head, start); |
2784 | start = end + 1; |
2785 | } |
2786 | } |
2787 | tomoyo_read_unlock(idx); |
2788 | #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER |
2789 | tomoyo_check_profile(); |
2790 | #endif |
2791 | } |
2792 |
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jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9