1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * security/tomoyo/common.c |
4 | * |
5 | * Copyright (C) 2005-2011 NTT DATA CORPORATION |
6 | */ |
7 | |
8 | #include <linux/uaccess.h> |
9 | #include <linux/slab.h> |
10 | #include <linux/security.h> |
11 | #include <linux/string_helpers.h> |
12 | #include "common.h" |
13 | |
14 | /* String table for operation mode. */ |
15 | const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = { |
16 | [TOMOYO_CONFIG_DISABLED] = "disabled" , |
17 | [TOMOYO_CONFIG_LEARNING] = "learning" , |
18 | [TOMOYO_CONFIG_PERMISSIVE] = "permissive" , |
19 | [TOMOYO_CONFIG_ENFORCING] = "enforcing" |
20 | }; |
21 | |
22 | /* String table for /sys/kernel/security/tomoyo/profile */ |
23 | const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX |
24 | + TOMOYO_MAX_MAC_CATEGORY_INDEX] = { |
25 | /* CONFIG::file group */ |
26 | [TOMOYO_MAC_FILE_EXECUTE] = "execute" , |
27 | [TOMOYO_MAC_FILE_OPEN] = "open" , |
28 | [TOMOYO_MAC_FILE_CREATE] = "create" , |
29 | [TOMOYO_MAC_FILE_UNLINK] = "unlink" , |
30 | [TOMOYO_MAC_FILE_GETATTR] = "getattr" , |
31 | [TOMOYO_MAC_FILE_MKDIR] = "mkdir" , |
32 | [TOMOYO_MAC_FILE_RMDIR] = "rmdir" , |
33 | [TOMOYO_MAC_FILE_MKFIFO] = "mkfifo" , |
34 | [TOMOYO_MAC_FILE_MKSOCK] = "mksock" , |
35 | [TOMOYO_MAC_FILE_TRUNCATE] = "truncate" , |
36 | [TOMOYO_MAC_FILE_SYMLINK] = "symlink" , |
37 | [TOMOYO_MAC_FILE_MKBLOCK] = "mkblock" , |
38 | [TOMOYO_MAC_FILE_MKCHAR] = "mkchar" , |
39 | [TOMOYO_MAC_FILE_LINK] = "link" , |
40 | [TOMOYO_MAC_FILE_RENAME] = "rename" , |
41 | [TOMOYO_MAC_FILE_CHMOD] = "chmod" , |
42 | [TOMOYO_MAC_FILE_CHOWN] = "chown" , |
43 | [TOMOYO_MAC_FILE_CHGRP] = "chgrp" , |
44 | [TOMOYO_MAC_FILE_IOCTL] = "ioctl" , |
45 | [TOMOYO_MAC_FILE_CHROOT] = "chroot" , |
46 | [TOMOYO_MAC_FILE_MOUNT] = "mount" , |
47 | [TOMOYO_MAC_FILE_UMOUNT] = "unmount" , |
48 | [TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root" , |
49 | /* CONFIG::network group */ |
50 | [TOMOYO_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind" , |
51 | [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen" , |
52 | [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect" , |
53 | [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind" , |
54 | [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send" , |
55 | [TOMOYO_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind" , |
56 | [TOMOYO_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send" , |
57 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind" , |
58 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen" , |
59 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect" , |
60 | [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind" , |
61 | [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send" , |
62 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind" , |
63 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen" , |
64 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect" , |
65 | /* CONFIG::misc group */ |
66 | [TOMOYO_MAC_ENVIRON] = "env" , |
67 | /* CONFIG group */ |
68 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file" , |
69 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_NETWORK] = "network" , |
70 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_MISC] = "misc" , |
71 | }; |
72 | |
73 | /* String table for conditions. */ |
74 | const char * const tomoyo_condition_keyword[TOMOYO_MAX_CONDITION_KEYWORD] = { |
75 | [TOMOYO_TASK_UID] = "task.uid" , |
76 | [TOMOYO_TASK_EUID] = "task.euid" , |
77 | [TOMOYO_TASK_SUID] = "task.suid" , |
78 | [TOMOYO_TASK_FSUID] = "task.fsuid" , |
79 | [TOMOYO_TASK_GID] = "task.gid" , |
80 | [TOMOYO_TASK_EGID] = "task.egid" , |
81 | [TOMOYO_TASK_SGID] = "task.sgid" , |
82 | [TOMOYO_TASK_FSGID] = "task.fsgid" , |
83 | [TOMOYO_TASK_PID] = "task.pid" , |
84 | [TOMOYO_TASK_PPID] = "task.ppid" , |
85 | [TOMOYO_EXEC_ARGC] = "exec.argc" , |
86 | [TOMOYO_EXEC_ENVC] = "exec.envc" , |
87 | [TOMOYO_TYPE_IS_SOCKET] = "socket" , |
88 | [TOMOYO_TYPE_IS_SYMLINK] = "symlink" , |
89 | [TOMOYO_TYPE_IS_FILE] = "file" , |
90 | [TOMOYO_TYPE_IS_BLOCK_DEV] = "block" , |
91 | [TOMOYO_TYPE_IS_DIRECTORY] = "directory" , |
92 | [TOMOYO_TYPE_IS_CHAR_DEV] = "char" , |
93 | [TOMOYO_TYPE_IS_FIFO] = "fifo" , |
94 | [TOMOYO_MODE_SETUID] = "setuid" , |
95 | [TOMOYO_MODE_SETGID] = "setgid" , |
96 | [TOMOYO_MODE_STICKY] = "sticky" , |
97 | [TOMOYO_MODE_OWNER_READ] = "owner_read" , |
98 | [TOMOYO_MODE_OWNER_WRITE] = "owner_write" , |
99 | [TOMOYO_MODE_OWNER_EXECUTE] = "owner_execute" , |
100 | [TOMOYO_MODE_GROUP_READ] = "group_read" , |
101 | [TOMOYO_MODE_GROUP_WRITE] = "group_write" , |
102 | [TOMOYO_MODE_GROUP_EXECUTE] = "group_execute" , |
103 | [TOMOYO_MODE_OTHERS_READ] = "others_read" , |
104 | [TOMOYO_MODE_OTHERS_WRITE] = "others_write" , |
105 | [TOMOYO_MODE_OTHERS_EXECUTE] = "others_execute" , |
106 | [TOMOYO_EXEC_REALPATH] = "exec.realpath" , |
107 | [TOMOYO_SYMLINK_TARGET] = "symlink.target" , |
108 | [TOMOYO_PATH1_UID] = "path1.uid" , |
109 | [TOMOYO_PATH1_GID] = "path1.gid" , |
110 | [TOMOYO_PATH1_INO] = "path1.ino" , |
111 | [TOMOYO_PATH1_MAJOR] = "path1.major" , |
112 | [TOMOYO_PATH1_MINOR] = "path1.minor" , |
113 | [TOMOYO_PATH1_PERM] = "path1.perm" , |
114 | [TOMOYO_PATH1_TYPE] = "path1.type" , |
115 | [TOMOYO_PATH1_DEV_MAJOR] = "path1.dev_major" , |
116 | [TOMOYO_PATH1_DEV_MINOR] = "path1.dev_minor" , |
117 | [TOMOYO_PATH2_UID] = "path2.uid" , |
118 | [TOMOYO_PATH2_GID] = "path2.gid" , |
119 | [TOMOYO_PATH2_INO] = "path2.ino" , |
120 | [TOMOYO_PATH2_MAJOR] = "path2.major" , |
121 | [TOMOYO_PATH2_MINOR] = "path2.minor" , |
122 | [TOMOYO_PATH2_PERM] = "path2.perm" , |
123 | [TOMOYO_PATH2_TYPE] = "path2.type" , |
124 | [TOMOYO_PATH2_DEV_MAJOR] = "path2.dev_major" , |
125 | [TOMOYO_PATH2_DEV_MINOR] = "path2.dev_minor" , |
126 | [TOMOYO_PATH1_PARENT_UID] = "path1.parent.uid" , |
127 | [TOMOYO_PATH1_PARENT_GID] = "path1.parent.gid" , |
128 | [TOMOYO_PATH1_PARENT_INO] = "path1.parent.ino" , |
129 | [TOMOYO_PATH1_PARENT_PERM] = "path1.parent.perm" , |
130 | [TOMOYO_PATH2_PARENT_UID] = "path2.parent.uid" , |
131 | [TOMOYO_PATH2_PARENT_GID] = "path2.parent.gid" , |
132 | [TOMOYO_PATH2_PARENT_INO] = "path2.parent.ino" , |
133 | [TOMOYO_PATH2_PARENT_PERM] = "path2.parent.perm" , |
134 | }; |
135 | |
136 | /* String table for PREFERENCE keyword. */ |
137 | static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = { |
138 | [TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log" , |
139 | [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry" , |
140 | }; |
141 | |
142 | /* String table for path operation. */ |
143 | const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = { |
144 | [TOMOYO_TYPE_EXECUTE] = "execute" , |
145 | [TOMOYO_TYPE_READ] = "read" , |
146 | [TOMOYO_TYPE_WRITE] = "write" , |
147 | [TOMOYO_TYPE_APPEND] = "append" , |
148 | [TOMOYO_TYPE_UNLINK] = "unlink" , |
149 | [TOMOYO_TYPE_GETATTR] = "getattr" , |
150 | [TOMOYO_TYPE_RMDIR] = "rmdir" , |
151 | [TOMOYO_TYPE_TRUNCATE] = "truncate" , |
152 | [TOMOYO_TYPE_SYMLINK] = "symlink" , |
153 | [TOMOYO_TYPE_CHROOT] = "chroot" , |
154 | [TOMOYO_TYPE_UMOUNT] = "unmount" , |
155 | }; |
156 | |
157 | /* String table for socket's operation. */ |
158 | const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION] = { |
159 | [TOMOYO_NETWORK_BIND] = "bind" , |
160 | [TOMOYO_NETWORK_LISTEN] = "listen" , |
161 | [TOMOYO_NETWORK_CONNECT] = "connect" , |
162 | [TOMOYO_NETWORK_SEND] = "send" , |
163 | }; |
164 | |
165 | /* String table for categories. */ |
166 | static const char * const tomoyo_category_keywords |
167 | [TOMOYO_MAX_MAC_CATEGORY_INDEX] = { |
168 | [TOMOYO_MAC_CATEGORY_FILE] = "file" , |
169 | [TOMOYO_MAC_CATEGORY_NETWORK] = "network" , |
170 | [TOMOYO_MAC_CATEGORY_MISC] = "misc" , |
171 | }; |
172 | |
173 | /* Permit policy management by non-root user? */ |
174 | static bool tomoyo_manage_by_non_root; |
175 | |
176 | /* Utility functions. */ |
177 | |
178 | /** |
179 | * tomoyo_addprintf - strncat()-like-snprintf(). |
180 | * |
181 | * @buffer: Buffer to write to. Must be '\0'-terminated. |
182 | * @len: Size of @buffer. |
183 | * @fmt: The printf()'s format string, followed by parameters. |
184 | * |
185 | * Returns nothing. |
186 | */ |
187 | __printf(3, 4) |
188 | static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...) |
189 | { |
190 | va_list args; |
191 | const int pos = strlen(buffer); |
192 | |
193 | va_start(args, fmt); |
194 | vsnprintf(buf: buffer + pos, size: len - pos - 1, fmt, args); |
195 | va_end(args); |
196 | } |
197 | |
198 | /** |
199 | * tomoyo_flush - Flush queued string to userspace's buffer. |
200 | * |
201 | * @head: Pointer to "struct tomoyo_io_buffer". |
202 | * |
203 | * Returns true if all data was flushed, false otherwise. |
204 | */ |
205 | static bool tomoyo_flush(struct tomoyo_io_buffer *head) |
206 | { |
207 | while (head->r.w_pos) { |
208 | const char *w = head->r.w[0]; |
209 | size_t len = strlen(w); |
210 | |
211 | if (len) { |
212 | if (len > head->read_user_buf_avail) |
213 | len = head->read_user_buf_avail; |
214 | if (!len) |
215 | return false; |
216 | if (copy_to_user(to: head->read_user_buf, from: w, n: len)) |
217 | return false; |
218 | head->read_user_buf_avail -= len; |
219 | head->read_user_buf += len; |
220 | w += len; |
221 | } |
222 | head->r.w[0] = w; |
223 | if (*w) |
224 | return false; |
225 | /* Add '\0' for audit logs and query. */ |
226 | if (head->poll) { |
227 | if (!head->read_user_buf_avail || |
228 | copy_to_user(to: head->read_user_buf, from: "" , n: 1)) |
229 | return false; |
230 | head->read_user_buf_avail--; |
231 | head->read_user_buf++; |
232 | } |
233 | head->r.w_pos--; |
234 | for (len = 0; len < head->r.w_pos; len++) |
235 | head->r.w[len] = head->r.w[len + 1]; |
236 | } |
237 | head->r.avail = 0; |
238 | return true; |
239 | } |
240 | |
241 | /** |
242 | * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure. |
243 | * |
244 | * @head: Pointer to "struct tomoyo_io_buffer". |
245 | * @string: String to print. |
246 | * |
247 | * Note that @string has to be kept valid until @head is kfree()d. |
248 | * This means that char[] allocated on stack memory cannot be passed to |
249 | * this function. Use tomoyo_io_printf() for char[] allocated on stack memory. |
250 | */ |
251 | static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string) |
252 | { |
253 | if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) { |
254 | head->r.w[head->r.w_pos++] = string; |
255 | tomoyo_flush(head); |
256 | } else |
257 | WARN_ON(1); |
258 | } |
259 | |
260 | static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, |
261 | ...) __printf(2, 3); |
262 | |
263 | /** |
264 | * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure. |
265 | * |
266 | * @head: Pointer to "struct tomoyo_io_buffer". |
267 | * @fmt: The printf()'s format string, followed by parameters. |
268 | */ |
269 | static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, |
270 | ...) |
271 | { |
272 | va_list args; |
273 | size_t len; |
274 | size_t pos = head->r.avail; |
275 | int size = head->readbuf_size - pos; |
276 | |
277 | if (size <= 0) |
278 | return; |
279 | va_start(args, fmt); |
280 | len = vsnprintf(buf: head->read_buf + pos, size, fmt, args) + 1; |
281 | va_end(args); |
282 | if (pos + len >= head->readbuf_size) { |
283 | WARN_ON(1); |
284 | return; |
285 | } |
286 | head->r.avail += len; |
287 | tomoyo_set_string(head, string: head->read_buf + pos); |
288 | } |
289 | |
290 | /** |
291 | * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure. |
292 | * |
293 | * @head: Pointer to "struct tomoyo_io_buffer". |
294 | * |
295 | * Returns nothing. |
296 | */ |
297 | static void tomoyo_set_space(struct tomoyo_io_buffer *head) |
298 | { |
299 | tomoyo_set_string(head, string: " " ); |
300 | } |
301 | |
302 | /** |
303 | * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure. |
304 | * |
305 | * @head: Pointer to "struct tomoyo_io_buffer". |
306 | * |
307 | * Returns nothing. |
308 | */ |
309 | static bool tomoyo_set_lf(struct tomoyo_io_buffer *head) |
310 | { |
311 | tomoyo_set_string(head, string: "\n" ); |
312 | return !head->r.w_pos; |
313 | } |
314 | |
315 | /** |
316 | * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure. |
317 | * |
318 | * @head: Pointer to "struct tomoyo_io_buffer". |
319 | * |
320 | * Returns nothing. |
321 | */ |
322 | static void tomoyo_set_slash(struct tomoyo_io_buffer *head) |
323 | { |
324 | tomoyo_set_string(head, string: "/" ); |
325 | } |
326 | |
327 | /* List of namespaces. */ |
328 | LIST_HEAD(tomoyo_namespace_list); |
329 | /* True if namespace other than tomoyo_kernel_namespace is defined. */ |
330 | static bool tomoyo_namespace_enabled; |
331 | |
332 | /** |
333 | * tomoyo_init_policy_namespace - Initialize namespace. |
334 | * |
335 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
336 | * |
337 | * Returns nothing. |
338 | */ |
339 | void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns) |
340 | { |
341 | unsigned int idx; |
342 | |
343 | for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++) |
344 | INIT_LIST_HEAD(list: &ns->acl_group[idx]); |
345 | for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++) |
346 | INIT_LIST_HEAD(list: &ns->group_list[idx]); |
347 | for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++) |
348 | INIT_LIST_HEAD(list: &ns->policy_list[idx]); |
349 | ns->profile_version = 20150505; |
350 | tomoyo_namespace_enabled = !list_empty(head: &tomoyo_namespace_list); |
351 | list_add_tail_rcu(new: &ns->namespace_list, head: &tomoyo_namespace_list); |
352 | } |
353 | |
354 | /** |
355 | * tomoyo_print_namespace - Print namespace header. |
356 | * |
357 | * @head: Pointer to "struct tomoyo_io_buffer". |
358 | * |
359 | * Returns nothing. |
360 | */ |
361 | static void tomoyo_print_namespace(struct tomoyo_io_buffer *head) |
362 | { |
363 | if (!tomoyo_namespace_enabled) |
364 | return; |
365 | tomoyo_set_string(head, |
366 | container_of(head->r.ns, |
367 | struct tomoyo_policy_namespace, |
368 | namespace_list)->name); |
369 | tomoyo_set_space(head); |
370 | } |
371 | |
372 | /** |
373 | * tomoyo_print_name_union - Print a tomoyo_name_union. |
374 | * |
375 | * @head: Pointer to "struct tomoyo_io_buffer". |
376 | * @ptr: Pointer to "struct tomoyo_name_union". |
377 | */ |
378 | static void tomoyo_print_name_union(struct tomoyo_io_buffer *head, |
379 | const struct tomoyo_name_union *ptr) |
380 | { |
381 | tomoyo_set_space(head); |
382 | if (ptr->group) { |
383 | tomoyo_set_string(head, string: "@" ); |
384 | tomoyo_set_string(head, string: ptr->group->group_name->name); |
385 | } else { |
386 | tomoyo_set_string(head, string: ptr->filename->name); |
387 | } |
388 | } |
389 | |
390 | /** |
391 | * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote. |
392 | * |
393 | * @head: Pointer to "struct tomoyo_io_buffer". |
394 | * @ptr: Pointer to "struct tomoyo_name_union". |
395 | * |
396 | * Returns nothing. |
397 | */ |
398 | static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer *head, |
399 | const struct tomoyo_name_union *ptr) |
400 | { |
401 | if (ptr->group) { |
402 | tomoyo_set_string(head, string: "@" ); |
403 | tomoyo_set_string(head, string: ptr->group->group_name->name); |
404 | } else { |
405 | tomoyo_set_string(head, string: "\"" ); |
406 | tomoyo_set_string(head, string: ptr->filename->name); |
407 | tomoyo_set_string(head, string: "\"" ); |
408 | } |
409 | } |
410 | |
411 | /** |
412 | * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space. |
413 | * |
414 | * @head: Pointer to "struct tomoyo_io_buffer". |
415 | * @ptr: Pointer to "struct tomoyo_number_union". |
416 | * |
417 | * Returns nothing. |
418 | */ |
419 | static void tomoyo_print_number_union_nospace |
420 | (struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr) |
421 | { |
422 | if (ptr->group) { |
423 | tomoyo_set_string(head, string: "@" ); |
424 | tomoyo_set_string(head, string: ptr->group->group_name->name); |
425 | } else { |
426 | int i; |
427 | unsigned long min = ptr->values[0]; |
428 | const unsigned long max = ptr->values[1]; |
429 | u8 min_type = ptr->value_type[0]; |
430 | const u8 max_type = ptr->value_type[1]; |
431 | char buffer[128]; |
432 | |
433 | buffer[0] = '\0'; |
434 | for (i = 0; i < 2; i++) { |
435 | switch (min_type) { |
436 | case TOMOYO_VALUE_TYPE_HEXADECIMAL: |
437 | tomoyo_addprintf(buffer, len: sizeof(buffer), |
438 | fmt: "0x%lX" , min); |
439 | break; |
440 | case TOMOYO_VALUE_TYPE_OCTAL: |
441 | tomoyo_addprintf(buffer, len: sizeof(buffer), |
442 | fmt: "0%lo" , min); |
443 | break; |
444 | default: |
445 | tomoyo_addprintf(buffer, len: sizeof(buffer), fmt: "%lu" , |
446 | min); |
447 | break; |
448 | } |
449 | if (min == max && min_type == max_type) |
450 | break; |
451 | tomoyo_addprintf(buffer, len: sizeof(buffer), fmt: "-" ); |
452 | min_type = max_type; |
453 | min = max; |
454 | } |
455 | tomoyo_io_printf(head, fmt: "%s" , buffer); |
456 | } |
457 | } |
458 | |
459 | /** |
460 | * tomoyo_print_number_union - Print a tomoyo_number_union. |
461 | * |
462 | * @head: Pointer to "struct tomoyo_io_buffer". |
463 | * @ptr: Pointer to "struct tomoyo_number_union". |
464 | * |
465 | * Returns nothing. |
466 | */ |
467 | static void tomoyo_print_number_union(struct tomoyo_io_buffer *head, |
468 | const struct tomoyo_number_union *ptr) |
469 | { |
470 | tomoyo_set_space(head); |
471 | tomoyo_print_number_union_nospace(head, ptr); |
472 | } |
473 | |
474 | /** |
475 | * tomoyo_assign_profile - Create a new profile. |
476 | * |
477 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
478 | * @profile: Profile number to create. |
479 | * |
480 | * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise. |
481 | */ |
482 | static struct tomoyo_profile *tomoyo_assign_profile |
483 | (struct tomoyo_policy_namespace *ns, const unsigned int profile) |
484 | { |
485 | struct tomoyo_profile *ptr; |
486 | struct tomoyo_profile *entry; |
487 | |
488 | if (profile >= TOMOYO_MAX_PROFILES) |
489 | return NULL; |
490 | ptr = ns->profile_ptr[profile]; |
491 | if (ptr) |
492 | return ptr; |
493 | entry = kzalloc(size: sizeof(*entry), GFP_NOFS | __GFP_NOWARN); |
494 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
495 | goto out; |
496 | ptr = ns->profile_ptr[profile]; |
497 | if (!ptr && tomoyo_memory_ok(ptr: entry)) { |
498 | ptr = entry; |
499 | ptr->default_config = TOMOYO_CONFIG_DISABLED | |
500 | TOMOYO_CONFIG_WANT_GRANT_LOG | |
501 | TOMOYO_CONFIG_WANT_REJECT_LOG; |
502 | memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT, |
503 | sizeof(ptr->config)); |
504 | ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] = |
505 | CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG; |
506 | ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] = |
507 | CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY; |
508 | mb(); /* Avoid out-of-order execution. */ |
509 | ns->profile_ptr[profile] = ptr; |
510 | entry = NULL; |
511 | } |
512 | mutex_unlock(lock: &tomoyo_policy_lock); |
513 | out: |
514 | kfree(objp: entry); |
515 | return ptr; |
516 | } |
517 | |
518 | /** |
519 | * tomoyo_profile - Find a profile. |
520 | * |
521 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
522 | * @profile: Profile number to find. |
523 | * |
524 | * Returns pointer to "struct tomoyo_profile". |
525 | */ |
526 | struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns, |
527 | const u8 profile) |
528 | { |
529 | static struct tomoyo_profile tomoyo_null_profile; |
530 | struct tomoyo_profile *ptr = ns->profile_ptr[profile]; |
531 | |
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 | |
549 | if (cp) { |
550 | cp += strlen(find); |
551 | if (!strncmp(cp, "=yes" , 4)) |
552 | return 1; |
553 | else if (!strncmp(cp, "=no" , 3)) |
554 | return 0; |
555 | } |
556 | return -1; |
557 | } |
558 | |
559 | /** |
560 | * tomoyo_set_uint - Set value for specified preference. |
561 | * |
562 | * @i: Pointer to "unsigned int". |
563 | * @string: String to check. |
564 | * @find: Name of keyword. |
565 | * |
566 | * Returns nothing. |
567 | */ |
568 | static void tomoyo_set_uint(unsigned int *i, const char *string, |
569 | const char *find) |
570 | { |
571 | const char *cp = strstr(string, find); |
572 | |
573 | if (cp) |
574 | sscanf(cp + strlen(find), "=%u" , i); |
575 | } |
576 | |
577 | /** |
578 | * tomoyo_set_mode - Set mode for specified profile. |
579 | * |
580 | * @name: Name of functionality. |
581 | * @value: Mode for @name. |
582 | * @profile: Pointer to "struct tomoyo_profile". |
583 | * |
584 | * Returns 0 on success, negative value otherwise. |
585 | */ |
586 | static int tomoyo_set_mode(char *name, const char *value, |
587 | struct tomoyo_profile *profile) |
588 | { |
589 | u8 i; |
590 | u8 config; |
591 | |
592 | if (!strcmp(name, "CONFIG" )) { |
593 | i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX; |
594 | config = profile->default_config; |
595 | } else if (tomoyo_str_starts(src: &name, find: "CONFIG::" )) { |
596 | config = 0; |
597 | for (i = 0; i < TOMOYO_MAX_MAC_INDEX |
598 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) { |
599 | int len = 0; |
600 | |
601 | if (i < TOMOYO_MAX_MAC_INDEX) { |
602 | const u8 c = tomoyo_index2category[i]; |
603 | const char *category = |
604 | tomoyo_category_keywords[c]; |
605 | |
606 | len = strlen(category); |
607 | if (strncmp(name, category, len) || |
608 | name[len++] != ':' || name[len++] != ':') |
609 | continue; |
610 | } |
611 | if (strcmp(name + len, tomoyo_mac_keywords[i])) |
612 | continue; |
613 | config = profile->config[i]; |
614 | break; |
615 | } |
616 | if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) |
617 | return -EINVAL; |
618 | } else { |
619 | return -EINVAL; |
620 | } |
621 | if (strstr(value, "use_default" )) { |
622 | config = TOMOYO_CONFIG_USE_DEFAULT; |
623 | } else { |
624 | u8 mode; |
625 | |
626 | for (mode = 0; mode < 4; mode++) |
627 | if (strstr(value, tomoyo_mode[mode])) |
628 | /* |
629 | * Update lower 3 bits in order to distinguish |
630 | * 'config' from 'TOMOYO_CONFIG_USE_DEFAULT'. |
631 | */ |
632 | config = (config & ~7) | mode; |
633 | if (config != TOMOYO_CONFIG_USE_DEFAULT) { |
634 | switch (tomoyo_find_yesno(string: value, find: "grant_log" )) { |
635 | case 1: |
636 | config |= TOMOYO_CONFIG_WANT_GRANT_LOG; |
637 | break; |
638 | case 0: |
639 | config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG; |
640 | break; |
641 | } |
642 | switch (tomoyo_find_yesno(string: value, find: "reject_log" )) { |
643 | case 1: |
644 | config |= TOMOYO_CONFIG_WANT_REJECT_LOG; |
645 | break; |
646 | case 0: |
647 | config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG; |
648 | break; |
649 | } |
650 | } |
651 | } |
652 | if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) |
653 | profile->config[i] = config; |
654 | else if (config != TOMOYO_CONFIG_USE_DEFAULT) |
655 | profile->default_config = config; |
656 | return 0; |
657 | } |
658 | |
659 | /** |
660 | * tomoyo_write_profile - Write profile table. |
661 | * |
662 | * @head: Pointer to "struct tomoyo_io_buffer". |
663 | * |
664 | * Returns 0 on success, negative value otherwise. |
665 | */ |
666 | static int tomoyo_write_profile(struct tomoyo_io_buffer *head) |
667 | { |
668 | char *data = head->write_buf; |
669 | unsigned int i; |
670 | char *cp; |
671 | struct tomoyo_profile *profile; |
672 | |
673 | if (sscanf(data, "PROFILE_VERSION=%u" , &head->w.ns->profile_version) |
674 | == 1) |
675 | return 0; |
676 | i = simple_strtoul(data, &cp, 10); |
677 | if (*cp != '-') |
678 | return -EINVAL; |
679 | data = cp + 1; |
680 | profile = tomoyo_assign_profile(ns: head->w.ns, profile: i); |
681 | if (!profile) |
682 | return -EINVAL; |
683 | cp = strchr(data, '='); |
684 | if (!cp) |
685 | return -EINVAL; |
686 | *cp++ = '\0'; |
687 | if (!strcmp(data, "COMMENT" )) { |
688 | static DEFINE_SPINLOCK(lock); |
689 | const struct tomoyo_path_info * |
690 | = tomoyo_get_name(name: cp); |
691 | const struct tomoyo_path_info *; |
692 | |
693 | if (!new_comment) |
694 | return -ENOMEM; |
695 | spin_lock(lock: &lock); |
696 | old_comment = profile->comment; |
697 | profile->comment = new_comment; |
698 | spin_unlock(lock: &lock); |
699 | tomoyo_put_name(name: old_comment); |
700 | return 0; |
701 | } |
702 | if (!strcmp(data, "PREFERENCE" )) { |
703 | for (i = 0; i < TOMOYO_MAX_PREF; i++) |
704 | tomoyo_set_uint(i: &profile->pref[i], string: cp, |
705 | find: tomoyo_pref_keywords[i]); |
706 | return 0; |
707 | } |
708 | return tomoyo_set_mode(name: data, value: cp, profile); |
709 | } |
710 | |
711 | /** |
712 | * tomoyo_print_config - Print mode for specified functionality. |
713 | * |
714 | * @head: Pointer to "struct tomoyo_io_buffer". |
715 | * @config: Mode for that functionality. |
716 | * |
717 | * Returns nothing. |
718 | * |
719 | * Caller prints functionality's name. |
720 | */ |
721 | static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config) |
722 | { |
723 | tomoyo_io_printf(head, fmt: "={ mode=%s grant_log=%s reject_log=%s }\n" , |
724 | tomoyo_mode[config & 3], |
725 | str_yes_no(v: config & TOMOYO_CONFIG_WANT_GRANT_LOG), |
726 | str_yes_no(v: config & TOMOYO_CONFIG_WANT_REJECT_LOG)); |
727 | } |
728 | |
729 | /** |
730 | * tomoyo_read_profile - Read profile table. |
731 | * |
732 | * @head: Pointer to "struct tomoyo_io_buffer". |
733 | * |
734 | * Returns nothing. |
735 | */ |
736 | static void tomoyo_read_profile(struct tomoyo_io_buffer *head) |
737 | { |
738 | u8 index; |
739 | struct tomoyo_policy_namespace *ns = |
740 | container_of(head->r.ns, typeof(*ns), namespace_list); |
741 | const struct tomoyo_profile *profile; |
742 | |
743 | if (head->r.eof) |
744 | return; |
745 | next: |
746 | index = head->r.index; |
747 | profile = ns->profile_ptr[index]; |
748 | switch (head->r.step) { |
749 | case 0: |
750 | tomoyo_print_namespace(head); |
751 | tomoyo_io_printf(head, fmt: "PROFILE_VERSION=%u\n" , |
752 | ns->profile_version); |
753 | head->r.step++; |
754 | break; |
755 | case 1: |
756 | for ( ; head->r.index < TOMOYO_MAX_PROFILES; |
757 | head->r.index++) |
758 | if (ns->profile_ptr[head->r.index]) |
759 | break; |
760 | if (head->r.index == TOMOYO_MAX_PROFILES) { |
761 | head->r.eof = true; |
762 | return; |
763 | } |
764 | head->r.step++; |
765 | break; |
766 | case 2: |
767 | { |
768 | u8 i; |
769 | const struct tomoyo_path_info * = |
770 | profile->comment; |
771 | |
772 | tomoyo_print_namespace(head); |
773 | tomoyo_io_printf(head, fmt: "%u-COMMENT=" , index); |
774 | tomoyo_set_string(head, string: comment ? comment->name : "" ); |
775 | tomoyo_set_lf(head); |
776 | tomoyo_print_namespace(head); |
777 | tomoyo_io_printf(head, fmt: "%u-PREFERENCE={ " , index); |
778 | for (i = 0; i < TOMOYO_MAX_PREF; i++) |
779 | tomoyo_io_printf(head, fmt: "%s=%u " , |
780 | tomoyo_pref_keywords[i], |
781 | profile->pref[i]); |
782 | tomoyo_set_string(head, string: "}\n" ); |
783 | head->r.step++; |
784 | } |
785 | break; |
786 | case 3: |
787 | { |
788 | tomoyo_print_namespace(head); |
789 | tomoyo_io_printf(head, fmt: "%u-%s" , index, "CONFIG" ); |
790 | tomoyo_print_config(head, config: profile->default_config); |
791 | head->r.bit = 0; |
792 | head->r.step++; |
793 | } |
794 | break; |
795 | case 4: |
796 | for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX |
797 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) { |
798 | const u8 i = head->r.bit; |
799 | const u8 config = profile->config[i]; |
800 | |
801 | if (config == TOMOYO_CONFIG_USE_DEFAULT) |
802 | continue; |
803 | tomoyo_print_namespace(head); |
804 | if (i < TOMOYO_MAX_MAC_INDEX) |
805 | tomoyo_io_printf(head, fmt: "%u-CONFIG::%s::%s" , |
806 | index, |
807 | tomoyo_category_keywords |
808 | [tomoyo_index2category[i]], |
809 | tomoyo_mac_keywords[i]); |
810 | else |
811 | tomoyo_io_printf(head, fmt: "%u-CONFIG::%s" , index, |
812 | tomoyo_mac_keywords[i]); |
813 | tomoyo_print_config(head, config); |
814 | head->r.bit++; |
815 | break; |
816 | } |
817 | if (head->r.bit == TOMOYO_MAX_MAC_INDEX |
818 | + TOMOYO_MAX_MAC_CATEGORY_INDEX) { |
819 | head->r.index++; |
820 | head->r.step = 1; |
821 | } |
822 | break; |
823 | } |
824 | if (tomoyo_flush(head)) |
825 | goto next; |
826 | } |
827 | |
828 | /** |
829 | * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry. |
830 | * |
831 | * @a: Pointer to "struct tomoyo_acl_head". |
832 | * @b: Pointer to "struct tomoyo_acl_head". |
833 | * |
834 | * Returns true if @a == @b, false otherwise. |
835 | */ |
836 | static bool tomoyo_same_manager(const struct tomoyo_acl_head *a, |
837 | const struct tomoyo_acl_head *b) |
838 | { |
839 | return container_of(a, struct tomoyo_manager, head)->manager == |
840 | container_of(b, struct tomoyo_manager, head)->manager; |
841 | } |
842 | |
843 | /** |
844 | * tomoyo_update_manager_entry - Add a manager entry. |
845 | * |
846 | * @manager: The path to manager or the domainnamme. |
847 | * @is_delete: True if it is a delete request. |
848 | * |
849 | * Returns 0 on success, negative value otherwise. |
850 | * |
851 | * Caller holds tomoyo_read_lock(). |
852 | */ |
853 | static int tomoyo_update_manager_entry(const char *manager, |
854 | const bool is_delete) |
855 | { |
856 | struct tomoyo_manager e = { }; |
857 | struct tomoyo_acl_param param = { |
858 | /* .ns = &tomoyo_kernel_namespace, */ |
859 | .is_delete = is_delete, |
860 | .list = &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER], |
861 | }; |
862 | int error = is_delete ? -ENOENT : -ENOMEM; |
863 | |
864 | if (!tomoyo_correct_domain(domainname: manager) && |
865 | !tomoyo_correct_word(string: manager)) |
866 | return -EINVAL; |
867 | e.manager = tomoyo_get_name(name: manager); |
868 | if (e.manager) { |
869 | error = tomoyo_update_policy(new_entry: &e.head, size: sizeof(e), param: ¶m, |
870 | check_duplicate: tomoyo_same_manager); |
871 | tomoyo_put_name(name: e.manager); |
872 | } |
873 | return error; |
874 | } |
875 | |
876 | /** |
877 | * tomoyo_write_manager - Write manager policy. |
878 | * |
879 | * @head: Pointer to "struct tomoyo_io_buffer". |
880 | * |
881 | * Returns 0 on success, negative value otherwise. |
882 | * |
883 | * Caller holds tomoyo_read_lock(). |
884 | */ |
885 | static int tomoyo_write_manager(struct tomoyo_io_buffer *head) |
886 | { |
887 | char *data = head->write_buf; |
888 | |
889 | if (!strcmp(data, "manage_by_non_root" )) { |
890 | tomoyo_manage_by_non_root = !head->w.is_delete; |
891 | return 0; |
892 | } |
893 | return tomoyo_update_manager_entry(manager: data, is_delete: head->w.is_delete); |
894 | } |
895 | |
896 | /** |
897 | * tomoyo_read_manager - Read manager policy. |
898 | * |
899 | * @head: Pointer to "struct tomoyo_io_buffer". |
900 | * |
901 | * Caller holds tomoyo_read_lock(). |
902 | */ |
903 | static void tomoyo_read_manager(struct tomoyo_io_buffer *head) |
904 | { |
905 | if (head->r.eof) |
906 | return; |
907 | list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER]) { |
908 | struct tomoyo_manager *ptr = |
909 | list_entry(head->r.acl, typeof(*ptr), head.list); |
910 | |
911 | if (ptr->head.is_deleted) |
912 | continue; |
913 | if (!tomoyo_flush(head)) |
914 | return; |
915 | tomoyo_set_string(head, string: ptr->manager->name); |
916 | tomoyo_set_lf(head); |
917 | } |
918 | head->r.eof = true; |
919 | } |
920 | |
921 | /** |
922 | * tomoyo_manager - Check whether the current process is a policy manager. |
923 | * |
924 | * Returns true if the current process is permitted to modify policy |
925 | * via /sys/kernel/security/tomoyo/ interface. |
926 | * |
927 | * Caller holds tomoyo_read_lock(). |
928 | */ |
929 | static bool tomoyo_manager(void) |
930 | { |
931 | struct tomoyo_manager *ptr; |
932 | const char *exe; |
933 | const struct task_struct *task = current; |
934 | const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname; |
935 | bool found = IS_ENABLED(CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING); |
936 | |
937 | if (!tomoyo_policy_loaded) |
938 | return true; |
939 | if (!tomoyo_manage_by_non_root && |
940 | (!uid_eq(left: task->cred->uid, GLOBAL_ROOT_UID) || |
941 | !uid_eq(task->cred->euid, GLOBAL_ROOT_UID))) |
942 | return false; |
943 | exe = tomoyo_get_exe(); |
944 | if (!exe) |
945 | return false; |
946 | list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER], head.list, |
947 | srcu_read_lock_held(&tomoyo_ss)) { |
948 | if (!ptr->head.is_deleted && |
949 | (!tomoyo_pathcmp(domainname, ptr->manager) || |
950 | !strcmp(exe, ptr->manager->name))) { |
951 | found = true; |
952 | break; |
953 | } |
954 | } |
955 | if (!found) { /* Reduce error messages. */ |
956 | static pid_t last_pid; |
957 | const pid_t pid = current->pid; |
958 | |
959 | if (last_pid != pid) { |
960 | pr_warn("%s ( %s ) is not permitted to update policies.\n" , |
961 | domainname->name, exe); |
962 | last_pid = pid; |
963 | } |
964 | } |
965 | kfree(exe); |
966 | return found; |
967 | } |
968 | |
969 | static struct tomoyo_domain_info *tomoyo_find_domain_by_qid |
970 | (unsigned int serial); |
971 | |
972 | /** |
973 | * tomoyo_select_domain - Parse select command. |
974 | * |
975 | * @head: Pointer to "struct tomoyo_io_buffer". |
976 | * @data: String to parse. |
977 | * |
978 | * Returns true on success, false otherwise. |
979 | * |
980 | * Caller holds tomoyo_read_lock(). |
981 | */ |
982 | static bool tomoyo_select_domain(struct tomoyo_io_buffer *head, |
983 | const char *data) |
984 | { |
985 | unsigned int pid; |
986 | struct tomoyo_domain_info *domain = NULL; |
987 | bool global_pid = false; |
988 | |
989 | if (strncmp(data, "select " , 7)) |
990 | return false; |
991 | data += 7; |
992 | if (sscanf(data, "pid=%u" , &pid) == 1 || |
993 | (global_pid = true, sscanf(data, "global-pid=%u" , &pid) == 1)) { |
994 | struct task_struct *p; |
995 | |
996 | rcu_read_lock(); |
997 | if (global_pid) |
998 | p = find_task_by_pid_ns(nr: pid, ns: &init_pid_ns); |
999 | else |
1000 | p = find_task_by_vpid(nr: pid); |
1001 | if (p) |
1002 | domain = tomoyo_task(task: p)->domain_info; |
1003 | rcu_read_unlock(); |
1004 | } else if (!strncmp(data, "domain=" , 7)) { |
1005 | if (tomoyo_domain_def(buffer: data + 7)) |
1006 | domain = tomoyo_find_domain(domainname: data + 7); |
1007 | } else if (sscanf(data, "Q=%u" , &pid) == 1) { |
1008 | domain = tomoyo_find_domain_by_qid(serial: pid); |
1009 | } else |
1010 | return false; |
1011 | head->w.domain = domain; |
1012 | /* Accessing read_buf is safe because head->io_sem is held. */ |
1013 | if (!head->read_buf) |
1014 | return true; /* Do nothing if open(O_WRONLY). */ |
1015 | memset(&head->r, 0, sizeof(head->r)); |
1016 | head->r.print_this_domain_only = true; |
1017 | if (domain) |
1018 | head->r.domain = &domain->list; |
1019 | else |
1020 | head->r.eof = true; |
1021 | tomoyo_io_printf(head, fmt: "# select %s\n" , data); |
1022 | if (domain && domain->is_deleted) |
1023 | tomoyo_io_printf(head, fmt: "# This is a deleted domain.\n" ); |
1024 | return true; |
1025 | } |
1026 | |
1027 | /** |
1028 | * tomoyo_same_task_acl - Check for duplicated "struct tomoyo_task_acl" entry. |
1029 | * |
1030 | * @a: Pointer to "struct tomoyo_acl_info". |
1031 | * @b: Pointer to "struct tomoyo_acl_info". |
1032 | * |
1033 | * Returns true if @a == @b, false otherwise. |
1034 | */ |
1035 | static bool tomoyo_same_task_acl(const struct tomoyo_acl_info *a, |
1036 | const struct tomoyo_acl_info *b) |
1037 | { |
1038 | const struct tomoyo_task_acl *p1 = container_of(a, typeof(*p1), head); |
1039 | const struct tomoyo_task_acl *p2 = container_of(b, typeof(*p2), head); |
1040 | |
1041 | return p1->domainname == p2->domainname; |
1042 | } |
1043 | |
1044 | /** |
1045 | * tomoyo_write_task - Update task related list. |
1046 | * |
1047 | * @param: Pointer to "struct tomoyo_acl_param". |
1048 | * |
1049 | * Returns 0 on success, negative value otherwise. |
1050 | * |
1051 | * Caller holds tomoyo_read_lock(). |
1052 | */ |
1053 | static int tomoyo_write_task(struct tomoyo_acl_param *param) |
1054 | { |
1055 | int error = -EINVAL; |
1056 | |
1057 | if (tomoyo_str_starts(src: ¶m->data, find: "manual_domain_transition " )) { |
1058 | struct tomoyo_task_acl e = { |
1059 | .head.type = TOMOYO_TYPE_MANUAL_TASK_ACL, |
1060 | .domainname = tomoyo_get_domainname(param), |
1061 | }; |
1062 | |
1063 | if (e.domainname) |
1064 | error = tomoyo_update_domain(new_entry: &e.head, size: sizeof(e), param, |
1065 | check_duplicate: tomoyo_same_task_acl, |
1066 | NULL); |
1067 | tomoyo_put_name(name: e.domainname); |
1068 | } |
1069 | return error; |
1070 | } |
1071 | |
1072 | /** |
1073 | * tomoyo_delete_domain - Delete a domain. |
1074 | * |
1075 | * @domainname: The name of domain. |
1076 | * |
1077 | * Returns 0 on success, negative value otherwise. |
1078 | * |
1079 | * Caller holds tomoyo_read_lock(). |
1080 | */ |
1081 | static int tomoyo_delete_domain(char *domainname) |
1082 | { |
1083 | struct tomoyo_domain_info *domain; |
1084 | struct tomoyo_path_info name; |
1085 | |
1086 | name.name = domainname; |
1087 | tomoyo_fill_path_info(ptr: &name); |
1088 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
1089 | return -EINTR; |
1090 | /* Is there an active domain? */ |
1091 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list, |
1092 | srcu_read_lock_held(&tomoyo_ss)) { |
1093 | /* Never delete tomoyo_kernel_domain */ |
1094 | if (domain == &tomoyo_kernel_domain) |
1095 | continue; |
1096 | if (domain->is_deleted || |
1097 | tomoyo_pathcmp(a: domain->domainname, b: &name)) |
1098 | continue; |
1099 | domain->is_deleted = true; |
1100 | break; |
1101 | } |
1102 | mutex_unlock(lock: &tomoyo_policy_lock); |
1103 | return 0; |
1104 | } |
1105 | |
1106 | /** |
1107 | * tomoyo_write_domain2 - Write domain policy. |
1108 | * |
1109 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
1110 | * @list: Pointer to "struct list_head". |
1111 | * @data: Policy to be interpreted. |
1112 | * @is_delete: True if it is a delete request. |
1113 | * |
1114 | * Returns 0 on success, negative value otherwise. |
1115 | * |
1116 | * Caller holds tomoyo_read_lock(). |
1117 | */ |
1118 | static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns, |
1119 | struct list_head *list, char *data, |
1120 | const bool is_delete) |
1121 | { |
1122 | struct tomoyo_acl_param param = { |
1123 | .ns = ns, |
1124 | .list = list, |
1125 | .data = data, |
1126 | .is_delete = is_delete, |
1127 | }; |
1128 | static const struct { |
1129 | const char *keyword; |
1130 | int (*write)(struct tomoyo_acl_param *param); |
1131 | } tomoyo_callback[5] = { |
1132 | { "file " , tomoyo_write_file }, |
1133 | { "network inet " , tomoyo_write_inet_network }, |
1134 | { "network unix " , tomoyo_write_unix_network }, |
1135 | { "misc " , tomoyo_write_misc }, |
1136 | { "task " , tomoyo_write_task }, |
1137 | }; |
1138 | u8 i; |
1139 | |
1140 | for (i = 0; i < ARRAY_SIZE(tomoyo_callback); i++) { |
1141 | if (!tomoyo_str_starts(src: ¶m.data, |
1142 | find: tomoyo_callback[i].keyword)) |
1143 | continue; |
1144 | return tomoyo_callback[i].write(¶m); |
1145 | } |
1146 | return -EINVAL; |
1147 | } |
1148 | |
1149 | /* String table for domain flags. */ |
1150 | const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = { |
1151 | [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n" , |
1152 | [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n" , |
1153 | }; |
1154 | |
1155 | /** |
1156 | * tomoyo_write_domain - Write domain policy. |
1157 | * |
1158 | * @head: Pointer to "struct tomoyo_io_buffer". |
1159 | * |
1160 | * Returns 0 on success, negative value otherwise. |
1161 | * |
1162 | * Caller holds tomoyo_read_lock(). |
1163 | */ |
1164 | static int tomoyo_write_domain(struct tomoyo_io_buffer *head) |
1165 | { |
1166 | char *data = head->write_buf; |
1167 | struct tomoyo_policy_namespace *ns; |
1168 | struct tomoyo_domain_info *domain = head->w.domain; |
1169 | const bool is_delete = head->w.is_delete; |
1170 | bool is_select = !is_delete && tomoyo_str_starts(src: &data, find: "select " ); |
1171 | unsigned int idx; |
1172 | |
1173 | if (*data == '<') { |
1174 | int ret = 0; |
1175 | |
1176 | domain = NULL; |
1177 | if (is_delete) |
1178 | ret = tomoyo_delete_domain(domainname: data); |
1179 | else if (is_select) |
1180 | domain = tomoyo_find_domain(domainname: data); |
1181 | else |
1182 | domain = tomoyo_assign_domain(domainname: data, transit: false); |
1183 | head->w.domain = domain; |
1184 | return ret; |
1185 | } |
1186 | if (!domain) |
1187 | return -EINVAL; |
1188 | ns = domain->ns; |
1189 | if (sscanf(data, "use_profile %u" , &idx) == 1 |
1190 | && idx < TOMOYO_MAX_PROFILES) { |
1191 | if (!tomoyo_policy_loaded || ns->profile_ptr[idx]) |
1192 | if (!is_delete) |
1193 | domain->profile = (u8) idx; |
1194 | return 0; |
1195 | } |
1196 | if (sscanf(data, "use_group %u\n" , &idx) == 1 |
1197 | && idx < TOMOYO_MAX_ACL_GROUPS) { |
1198 | if (!is_delete) |
1199 | set_bit(nr: idx, addr: domain->group); |
1200 | else |
1201 | clear_bit(nr: idx, addr: domain->group); |
1202 | return 0; |
1203 | } |
1204 | for (idx = 0; idx < TOMOYO_MAX_DOMAIN_INFO_FLAGS; idx++) { |
1205 | const char *cp = tomoyo_dif[idx]; |
1206 | |
1207 | if (strncmp(data, cp, strlen(cp) - 1)) |
1208 | continue; |
1209 | domain->flags[idx] = !is_delete; |
1210 | return 0; |
1211 | } |
1212 | return tomoyo_write_domain2(ns, list: &domain->acl_info_list, data, |
1213 | is_delete); |
1214 | } |
1215 | |
1216 | /** |
1217 | * tomoyo_print_condition - Print condition part. |
1218 | * |
1219 | * @head: Pointer to "struct tomoyo_io_buffer". |
1220 | * @cond: Pointer to "struct tomoyo_condition". |
1221 | * |
1222 | * Returns true on success, false otherwise. |
1223 | */ |
1224 | static bool tomoyo_print_condition(struct tomoyo_io_buffer *head, |
1225 | const struct tomoyo_condition *cond) |
1226 | { |
1227 | switch (head->r.cond_step) { |
1228 | case 0: |
1229 | head->r.cond_index = 0; |
1230 | head->r.cond_step++; |
1231 | if (cond->transit) { |
1232 | tomoyo_set_space(head); |
1233 | tomoyo_set_string(head, string: cond->transit->name); |
1234 | } |
1235 | fallthrough; |
1236 | case 1: |
1237 | { |
1238 | const u16 condc = cond->condc; |
1239 | const struct tomoyo_condition_element *condp = |
1240 | (typeof(condp)) (cond + 1); |
1241 | const struct tomoyo_number_union *numbers_p = |
1242 | (typeof(numbers_p)) (condp + condc); |
1243 | const struct tomoyo_name_union *names_p = |
1244 | (typeof(names_p)) |
1245 | (numbers_p + cond->numbers_count); |
1246 | const struct tomoyo_argv *argv = |
1247 | (typeof(argv)) (names_p + cond->names_count); |
1248 | const struct tomoyo_envp *envp = |
1249 | (typeof(envp)) (argv + cond->argc); |
1250 | u16 skip; |
1251 | |
1252 | for (skip = 0; skip < head->r.cond_index; skip++) { |
1253 | const u8 left = condp->left; |
1254 | const u8 right = condp->right; |
1255 | |
1256 | condp++; |
1257 | switch (left) { |
1258 | case TOMOYO_ARGV_ENTRY: |
1259 | argv++; |
1260 | continue; |
1261 | case TOMOYO_ENVP_ENTRY: |
1262 | envp++; |
1263 | continue; |
1264 | case TOMOYO_NUMBER_UNION: |
1265 | numbers_p++; |
1266 | break; |
1267 | } |
1268 | switch (right) { |
1269 | case TOMOYO_NAME_UNION: |
1270 | names_p++; |
1271 | break; |
1272 | case TOMOYO_NUMBER_UNION: |
1273 | numbers_p++; |
1274 | break; |
1275 | } |
1276 | } |
1277 | while (head->r.cond_index < condc) { |
1278 | const u8 match = condp->equals; |
1279 | const u8 left = condp->left; |
1280 | const u8 right = condp->right; |
1281 | |
1282 | if (!tomoyo_flush(head)) |
1283 | return false; |
1284 | condp++; |
1285 | head->r.cond_index++; |
1286 | tomoyo_set_space(head); |
1287 | switch (left) { |
1288 | case TOMOYO_ARGV_ENTRY: |
1289 | tomoyo_io_printf(head, |
1290 | fmt: "exec.argv[%lu]%s=\"" , |
1291 | argv->index, argv->is_not ? "!" : "" ); |
1292 | tomoyo_set_string(head, |
1293 | string: argv->value->name); |
1294 | tomoyo_set_string(head, string: "\"" ); |
1295 | argv++; |
1296 | continue; |
1297 | case TOMOYO_ENVP_ENTRY: |
1298 | tomoyo_set_string(head, |
1299 | string: "exec.envp[\"" ); |
1300 | tomoyo_set_string(head, |
1301 | string: envp->name->name); |
1302 | tomoyo_io_printf(head, fmt: "\"]%s=" , envp->is_not ? "!" : "" ); |
1303 | if (envp->value) { |
1304 | tomoyo_set_string(head, string: "\"" ); |
1305 | tomoyo_set_string(head, string: envp->value->name); |
1306 | tomoyo_set_string(head, string: "\"" ); |
1307 | } else { |
1308 | tomoyo_set_string(head, |
1309 | string: "NULL" ); |
1310 | } |
1311 | envp++; |
1312 | continue; |
1313 | case TOMOYO_NUMBER_UNION: |
1314 | tomoyo_print_number_union_nospace |
1315 | (head, ptr: numbers_p++); |
1316 | break; |
1317 | default: |
1318 | tomoyo_set_string(head, |
1319 | string: tomoyo_condition_keyword[left]); |
1320 | break; |
1321 | } |
1322 | tomoyo_set_string(head, string: match ? "=" : "!=" ); |
1323 | switch (right) { |
1324 | case TOMOYO_NAME_UNION: |
1325 | tomoyo_print_name_union_quoted |
1326 | (head, ptr: names_p++); |
1327 | break; |
1328 | case TOMOYO_NUMBER_UNION: |
1329 | tomoyo_print_number_union_nospace |
1330 | (head, ptr: numbers_p++); |
1331 | break; |
1332 | default: |
1333 | tomoyo_set_string(head, |
1334 | string: tomoyo_condition_keyword[right]); |
1335 | break; |
1336 | } |
1337 | } |
1338 | } |
1339 | head->r.cond_step++; |
1340 | fallthrough; |
1341 | case 2: |
1342 | if (!tomoyo_flush(head)) |
1343 | break; |
1344 | head->r.cond_step++; |
1345 | fallthrough; |
1346 | case 3: |
1347 | if (cond->grant_log != TOMOYO_GRANTLOG_AUTO) |
1348 | tomoyo_io_printf(head, fmt: " grant_log=%s" , |
1349 | str_yes_no(v: cond->grant_log == |
1350 | TOMOYO_GRANTLOG_YES)); |
1351 | tomoyo_set_lf(head); |
1352 | return true; |
1353 | } |
1354 | return false; |
1355 | } |
1356 | |
1357 | /** |
1358 | * tomoyo_set_group - Print "acl_group " header keyword and category name. |
1359 | * |
1360 | * @head: Pointer to "struct tomoyo_io_buffer". |
1361 | * @category: Category name. |
1362 | * |
1363 | * Returns nothing. |
1364 | */ |
1365 | static void tomoyo_set_group(struct tomoyo_io_buffer *head, |
1366 | const char *category) |
1367 | { |
1368 | if (head->type == TOMOYO_EXCEPTIONPOLICY) { |
1369 | tomoyo_print_namespace(head); |
1370 | tomoyo_io_printf(head, fmt: "acl_group %u " , |
1371 | head->r.acl_group_index); |
1372 | } |
1373 | tomoyo_set_string(head, string: category); |
1374 | } |
1375 | |
1376 | /** |
1377 | * tomoyo_print_entry - Print an ACL entry. |
1378 | * |
1379 | * @head: Pointer to "struct tomoyo_io_buffer". |
1380 | * @acl: Pointer to an ACL entry. |
1381 | * |
1382 | * Returns true on success, false otherwise. |
1383 | */ |
1384 | static bool tomoyo_print_entry(struct tomoyo_io_buffer *head, |
1385 | struct tomoyo_acl_info *acl) |
1386 | { |
1387 | const u8 acl_type = acl->type; |
1388 | bool first = true; |
1389 | u8 bit; |
1390 | |
1391 | if (head->r.print_cond_part) |
1392 | goto print_cond_part; |
1393 | if (acl->is_deleted) |
1394 | return true; |
1395 | if (!tomoyo_flush(head)) |
1396 | return false; |
1397 | else if (acl_type == TOMOYO_TYPE_PATH_ACL) { |
1398 | struct tomoyo_path_acl *ptr = |
1399 | container_of(acl, typeof(*ptr), head); |
1400 | const u16 perm = ptr->perm; |
1401 | |
1402 | for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) { |
1403 | if (!(perm & (1 << bit))) |
1404 | continue; |
1405 | if (head->r.print_transition_related_only && |
1406 | bit != TOMOYO_TYPE_EXECUTE) |
1407 | continue; |
1408 | if (first) { |
1409 | tomoyo_set_group(head, category: "file " ); |
1410 | first = false; |
1411 | } else { |
1412 | tomoyo_set_slash(head); |
1413 | } |
1414 | tomoyo_set_string(head, string: tomoyo_path_keyword[bit]); |
1415 | } |
1416 | if (first) |
1417 | return true; |
1418 | tomoyo_print_name_union(head, ptr: &ptr->name); |
1419 | } else if (acl_type == TOMOYO_TYPE_MANUAL_TASK_ACL) { |
1420 | struct tomoyo_task_acl *ptr = |
1421 | container_of(acl, typeof(*ptr), head); |
1422 | |
1423 | tomoyo_set_group(head, category: "task " ); |
1424 | tomoyo_set_string(head, string: "manual_domain_transition " ); |
1425 | tomoyo_set_string(head, string: ptr->domainname->name); |
1426 | } else if (head->r.print_transition_related_only) { |
1427 | return true; |
1428 | } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) { |
1429 | struct tomoyo_path2_acl *ptr = |
1430 | container_of(acl, typeof(*ptr), head); |
1431 | const u8 perm = ptr->perm; |
1432 | |
1433 | for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) { |
1434 | if (!(perm & (1 << bit))) |
1435 | continue; |
1436 | if (first) { |
1437 | tomoyo_set_group(head, category: "file " ); |
1438 | first = false; |
1439 | } else { |
1440 | tomoyo_set_slash(head); |
1441 | } |
1442 | tomoyo_set_string(head, string: tomoyo_mac_keywords |
1443 | [tomoyo_pp2mac[bit]]); |
1444 | } |
1445 | if (first) |
1446 | return true; |
1447 | tomoyo_print_name_union(head, ptr: &ptr->name1); |
1448 | tomoyo_print_name_union(head, ptr: &ptr->name2); |
1449 | } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) { |
1450 | struct tomoyo_path_number_acl *ptr = |
1451 | container_of(acl, typeof(*ptr), head); |
1452 | const u8 perm = ptr->perm; |
1453 | |
1454 | for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) { |
1455 | if (!(perm & (1 << bit))) |
1456 | continue; |
1457 | if (first) { |
1458 | tomoyo_set_group(head, category: "file " ); |
1459 | first = false; |
1460 | } else { |
1461 | tomoyo_set_slash(head); |
1462 | } |
1463 | tomoyo_set_string(head, string: tomoyo_mac_keywords |
1464 | [tomoyo_pn2mac[bit]]); |
1465 | } |
1466 | if (first) |
1467 | return true; |
1468 | tomoyo_print_name_union(head, ptr: &ptr->name); |
1469 | tomoyo_print_number_union(head, ptr: &ptr->number); |
1470 | } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) { |
1471 | struct tomoyo_mkdev_acl *ptr = |
1472 | container_of(acl, typeof(*ptr), head); |
1473 | const u8 perm = ptr->perm; |
1474 | |
1475 | for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) { |
1476 | if (!(perm & (1 << bit))) |
1477 | continue; |
1478 | if (first) { |
1479 | tomoyo_set_group(head, category: "file " ); |
1480 | first = false; |
1481 | } else { |
1482 | tomoyo_set_slash(head); |
1483 | } |
1484 | tomoyo_set_string(head, string: tomoyo_mac_keywords |
1485 | [tomoyo_pnnn2mac[bit]]); |
1486 | } |
1487 | if (first) |
1488 | return true; |
1489 | tomoyo_print_name_union(head, ptr: &ptr->name); |
1490 | tomoyo_print_number_union(head, ptr: &ptr->mode); |
1491 | tomoyo_print_number_union(head, ptr: &ptr->major); |
1492 | tomoyo_print_number_union(head, ptr: &ptr->minor); |
1493 | } else if (acl_type == TOMOYO_TYPE_INET_ACL) { |
1494 | struct tomoyo_inet_acl *ptr = |
1495 | container_of(acl, typeof(*ptr), head); |
1496 | const u8 perm = ptr->perm; |
1497 | |
1498 | for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) { |
1499 | if (!(perm & (1 << bit))) |
1500 | continue; |
1501 | if (first) { |
1502 | tomoyo_set_group(head, category: "network inet " ); |
1503 | tomoyo_set_string(head, string: tomoyo_proto_keyword |
1504 | [ptr->protocol]); |
1505 | tomoyo_set_space(head); |
1506 | first = false; |
1507 | } else { |
1508 | tomoyo_set_slash(head); |
1509 | } |
1510 | tomoyo_set_string(head, string: tomoyo_socket_keyword[bit]); |
1511 | } |
1512 | if (first) |
1513 | return true; |
1514 | tomoyo_set_space(head); |
1515 | if (ptr->address.group) { |
1516 | tomoyo_set_string(head, string: "@" ); |
1517 | tomoyo_set_string(head, string: ptr->address.group->group_name |
1518 | ->name); |
1519 | } else { |
1520 | char buf[128]; |
1521 | |
1522 | tomoyo_print_ip(buf, size: sizeof(buf), ptr: &ptr->address); |
1523 | tomoyo_io_printf(head, fmt: "%s" , buf); |
1524 | } |
1525 | tomoyo_print_number_union(head, ptr: &ptr->port); |
1526 | } else if (acl_type == TOMOYO_TYPE_UNIX_ACL) { |
1527 | struct tomoyo_unix_acl *ptr = |
1528 | container_of(acl, typeof(*ptr), head); |
1529 | const u8 perm = ptr->perm; |
1530 | |
1531 | for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) { |
1532 | if (!(perm & (1 << bit))) |
1533 | continue; |
1534 | if (first) { |
1535 | tomoyo_set_group(head, category: "network unix " ); |
1536 | tomoyo_set_string(head, string: tomoyo_proto_keyword |
1537 | [ptr->protocol]); |
1538 | tomoyo_set_space(head); |
1539 | first = false; |
1540 | } else { |
1541 | tomoyo_set_slash(head); |
1542 | } |
1543 | tomoyo_set_string(head, string: tomoyo_socket_keyword[bit]); |
1544 | } |
1545 | if (first) |
1546 | return true; |
1547 | tomoyo_print_name_union(head, ptr: &ptr->name); |
1548 | } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) { |
1549 | struct tomoyo_mount_acl *ptr = |
1550 | container_of(acl, typeof(*ptr), head); |
1551 | |
1552 | tomoyo_set_group(head, category: "file mount" ); |
1553 | tomoyo_print_name_union(head, ptr: &ptr->dev_name); |
1554 | tomoyo_print_name_union(head, ptr: &ptr->dir_name); |
1555 | tomoyo_print_name_union(head, ptr: &ptr->fs_type); |
1556 | tomoyo_print_number_union(head, ptr: &ptr->flags); |
1557 | } else if (acl_type == TOMOYO_TYPE_ENV_ACL) { |
1558 | struct tomoyo_env_acl *ptr = |
1559 | container_of(acl, typeof(*ptr), head); |
1560 | |
1561 | tomoyo_set_group(head, category: "misc env " ); |
1562 | tomoyo_set_string(head, string: ptr->env->name); |
1563 | } |
1564 | if (acl->cond) { |
1565 | head->r.print_cond_part = true; |
1566 | head->r.cond_step = 0; |
1567 | if (!tomoyo_flush(head)) |
1568 | return false; |
1569 | print_cond_part: |
1570 | if (!tomoyo_print_condition(head, cond: acl->cond)) |
1571 | return false; |
1572 | head->r.print_cond_part = false; |
1573 | } else { |
1574 | tomoyo_set_lf(head); |
1575 | } |
1576 | return true; |
1577 | } |
1578 | |
1579 | /** |
1580 | * tomoyo_read_domain2 - Read domain policy. |
1581 | * |
1582 | * @head: Pointer to "struct tomoyo_io_buffer". |
1583 | * @list: Pointer to "struct list_head". |
1584 | * |
1585 | * Caller holds tomoyo_read_lock(). |
1586 | * |
1587 | * Returns true on success, false otherwise. |
1588 | */ |
1589 | static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head, |
1590 | struct list_head *list) |
1591 | { |
1592 | list_for_each_cookie(head->r.acl, list) { |
1593 | struct tomoyo_acl_info *ptr = |
1594 | list_entry(head->r.acl, typeof(*ptr), list); |
1595 | |
1596 | if (!tomoyo_print_entry(head, acl: ptr)) |
1597 | return false; |
1598 | } |
1599 | head->r.acl = NULL; |
1600 | return true; |
1601 | } |
1602 | |
1603 | /** |
1604 | * tomoyo_read_domain - Read domain policy. |
1605 | * |
1606 | * @head: Pointer to "struct tomoyo_io_buffer". |
1607 | * |
1608 | * Caller holds tomoyo_read_lock(). |
1609 | */ |
1610 | static void tomoyo_read_domain(struct tomoyo_io_buffer *head) |
1611 | { |
1612 | if (head->r.eof) |
1613 | return; |
1614 | list_for_each_cookie(head->r.domain, &tomoyo_domain_list) { |
1615 | struct tomoyo_domain_info *domain = |
1616 | list_entry(head->r.domain, typeof(*domain), list); |
1617 | u8 i; |
1618 | |
1619 | switch (head->r.step) { |
1620 | case 0: |
1621 | if (domain->is_deleted && |
1622 | !head->r.print_this_domain_only) |
1623 | continue; |
1624 | /* Print domainname and flags. */ |
1625 | tomoyo_set_string(head, string: domain->domainname->name); |
1626 | tomoyo_set_lf(head); |
1627 | tomoyo_io_printf(head, fmt: "use_profile %u\n" , |
1628 | domain->profile); |
1629 | for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++) |
1630 | if (domain->flags[i]) |
1631 | tomoyo_set_string(head, string: tomoyo_dif[i]); |
1632 | head->r.index = 0; |
1633 | head->r.step++; |
1634 | fallthrough; |
1635 | case 1: |
1636 | while (head->r.index < TOMOYO_MAX_ACL_GROUPS) { |
1637 | i = head->r.index++; |
1638 | if (!test_bit(i, domain->group)) |
1639 | continue; |
1640 | tomoyo_io_printf(head, fmt: "use_group %u\n" , i); |
1641 | if (!tomoyo_flush(head)) |
1642 | return; |
1643 | } |
1644 | head->r.index = 0; |
1645 | head->r.step++; |
1646 | tomoyo_set_lf(head); |
1647 | fallthrough; |
1648 | case 2: |
1649 | if (!tomoyo_read_domain2(head, list: &domain->acl_info_list)) |
1650 | return; |
1651 | head->r.step++; |
1652 | if (!tomoyo_set_lf(head)) |
1653 | return; |
1654 | fallthrough; |
1655 | case 3: |
1656 | head->r.step = 0; |
1657 | if (head->r.print_this_domain_only) |
1658 | goto done; |
1659 | } |
1660 | } |
1661 | done: |
1662 | head->r.eof = true; |
1663 | } |
1664 | |
1665 | /** |
1666 | * tomoyo_write_pid: Specify PID to obtain domainname. |
1667 | * |
1668 | * @head: Pointer to "struct tomoyo_io_buffer". |
1669 | * |
1670 | * Returns 0. |
1671 | */ |
1672 | static int tomoyo_write_pid(struct tomoyo_io_buffer *head) |
1673 | { |
1674 | head->r.eof = false; |
1675 | return 0; |
1676 | } |
1677 | |
1678 | /** |
1679 | * tomoyo_read_pid - Get domainname of the specified PID. |
1680 | * |
1681 | * @head: Pointer to "struct tomoyo_io_buffer". |
1682 | * |
1683 | * Returns the domainname which the specified PID is in on success, |
1684 | * empty string otherwise. |
1685 | * The PID is specified by tomoyo_write_pid() so that the user can obtain |
1686 | * using read()/write() interface rather than sysctl() interface. |
1687 | */ |
1688 | static void tomoyo_read_pid(struct tomoyo_io_buffer *head) |
1689 | { |
1690 | char *buf = head->write_buf; |
1691 | bool global_pid = false; |
1692 | unsigned int pid; |
1693 | struct task_struct *p; |
1694 | struct tomoyo_domain_info *domain = NULL; |
1695 | |
1696 | /* Accessing write_buf is safe because head->io_sem is held. */ |
1697 | if (!buf) { |
1698 | head->r.eof = true; |
1699 | return; /* Do nothing if open(O_RDONLY). */ |
1700 | } |
1701 | if (head->r.w_pos || head->r.eof) |
1702 | return; |
1703 | head->r.eof = true; |
1704 | if (tomoyo_str_starts(src: &buf, find: "global-pid " )) |
1705 | global_pid = true; |
1706 | if (kstrtouint(s: buf, base: 10, res: &pid)) |
1707 | return; |
1708 | rcu_read_lock(); |
1709 | if (global_pid) |
1710 | p = find_task_by_pid_ns(nr: pid, ns: &init_pid_ns); |
1711 | else |
1712 | p = find_task_by_vpid(nr: pid); |
1713 | if (p) |
1714 | domain = tomoyo_task(task: p)->domain_info; |
1715 | rcu_read_unlock(); |
1716 | if (!domain) |
1717 | return; |
1718 | tomoyo_io_printf(head, fmt: "%u %u " , pid, domain->profile); |
1719 | tomoyo_set_string(head, string: domain->domainname->name); |
1720 | } |
1721 | |
1722 | /* String table for domain transition control keywords. */ |
1723 | static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = { |
1724 | [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain " , |
1725 | [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain " , |
1726 | [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain " , |
1727 | [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain " , |
1728 | [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain " , |
1729 | [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain " , |
1730 | }; |
1731 | |
1732 | /* String table for grouping keywords. */ |
1733 | static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = { |
1734 | [TOMOYO_PATH_GROUP] = "path_group " , |
1735 | [TOMOYO_NUMBER_GROUP] = "number_group " , |
1736 | [TOMOYO_ADDRESS_GROUP] = "address_group " , |
1737 | }; |
1738 | |
1739 | /** |
1740 | * tomoyo_write_exception - Write exception policy. |
1741 | * |
1742 | * @head: Pointer to "struct tomoyo_io_buffer". |
1743 | * |
1744 | * Returns 0 on success, negative value otherwise. |
1745 | * |
1746 | * Caller holds tomoyo_read_lock(). |
1747 | */ |
1748 | static int tomoyo_write_exception(struct tomoyo_io_buffer *head) |
1749 | { |
1750 | const bool is_delete = head->w.is_delete; |
1751 | struct tomoyo_acl_param param = { |
1752 | .ns = head->w.ns, |
1753 | .is_delete = is_delete, |
1754 | .data = head->write_buf, |
1755 | }; |
1756 | u8 i; |
1757 | |
1758 | if (tomoyo_str_starts(src: ¶m.data, find: "aggregator " )) |
1759 | return tomoyo_write_aggregator(param: ¶m); |
1760 | for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++) |
1761 | if (tomoyo_str_starts(src: ¶m.data, find: tomoyo_transition_type[i])) |
1762 | return tomoyo_write_transition_control(param: ¶m, type: i); |
1763 | for (i = 0; i < TOMOYO_MAX_GROUP; i++) |
1764 | if (tomoyo_str_starts(src: ¶m.data, find: tomoyo_group_name[i])) |
1765 | return tomoyo_write_group(param: ¶m, type: i); |
1766 | if (tomoyo_str_starts(src: ¶m.data, find: "acl_group " )) { |
1767 | unsigned int group; |
1768 | char *data; |
1769 | |
1770 | group = simple_strtoul(param.data, &data, 10); |
1771 | if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ') |
1772 | return tomoyo_write_domain2 |
1773 | (ns: head->w.ns, list: &head->w.ns->acl_group[group], |
1774 | data, is_delete); |
1775 | } |
1776 | return -EINVAL; |
1777 | } |
1778 | |
1779 | /** |
1780 | * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list. |
1781 | * |
1782 | * @head: Pointer to "struct tomoyo_io_buffer". |
1783 | * @idx: Index number. |
1784 | * |
1785 | * Returns true on success, false otherwise. |
1786 | * |
1787 | * Caller holds tomoyo_read_lock(). |
1788 | */ |
1789 | static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx) |
1790 | { |
1791 | struct tomoyo_policy_namespace *ns = |
1792 | container_of(head->r.ns, typeof(*ns), namespace_list); |
1793 | struct list_head *list = &ns->group_list[idx]; |
1794 | |
1795 | list_for_each_cookie(head->r.group, list) { |
1796 | struct tomoyo_group *group = |
1797 | list_entry(head->r.group, typeof(*group), head.list); |
1798 | |
1799 | list_for_each_cookie(head->r.acl, &group->member_list) { |
1800 | struct tomoyo_acl_head *ptr = |
1801 | list_entry(head->r.acl, typeof(*ptr), list); |
1802 | |
1803 | if (ptr->is_deleted) |
1804 | continue; |
1805 | if (!tomoyo_flush(head)) |
1806 | return false; |
1807 | tomoyo_print_namespace(head); |
1808 | tomoyo_set_string(head, string: tomoyo_group_name[idx]); |
1809 | tomoyo_set_string(head, string: group->group_name->name); |
1810 | if (idx == TOMOYO_PATH_GROUP) { |
1811 | tomoyo_set_space(head); |
1812 | tomoyo_set_string(head, container_of |
1813 | (ptr, struct tomoyo_path_group, |
1814 | head)->member_name->name); |
1815 | } else if (idx == TOMOYO_NUMBER_GROUP) { |
1816 | tomoyo_print_number_union(head, ptr: &container_of |
1817 | (ptr, |
1818 | struct tomoyo_number_group, |
1819 | head)->number); |
1820 | } else if (idx == TOMOYO_ADDRESS_GROUP) { |
1821 | char buffer[128]; |
1822 | struct tomoyo_address_group *member = |
1823 | container_of(ptr, typeof(*member), |
1824 | head); |
1825 | |
1826 | tomoyo_print_ip(buf: buffer, size: sizeof(buffer), |
1827 | ptr: &member->address); |
1828 | tomoyo_io_printf(head, fmt: " %s" , buffer); |
1829 | } |
1830 | tomoyo_set_lf(head); |
1831 | } |
1832 | head->r.acl = NULL; |
1833 | } |
1834 | head->r.group = NULL; |
1835 | return true; |
1836 | } |
1837 | |
1838 | /** |
1839 | * tomoyo_read_policy - Read "struct tomoyo_..._entry" list. |
1840 | * |
1841 | * @head: Pointer to "struct tomoyo_io_buffer". |
1842 | * @idx: Index number. |
1843 | * |
1844 | * Returns true on success, false otherwise. |
1845 | * |
1846 | * Caller holds tomoyo_read_lock(). |
1847 | */ |
1848 | static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx) |
1849 | { |
1850 | struct tomoyo_policy_namespace *ns = |
1851 | container_of(head->r.ns, typeof(*ns), namespace_list); |
1852 | struct list_head *list = &ns->policy_list[idx]; |
1853 | |
1854 | list_for_each_cookie(head->r.acl, list) { |
1855 | struct tomoyo_acl_head *acl = |
1856 | container_of(head->r.acl, typeof(*acl), list); |
1857 | if (acl->is_deleted) |
1858 | continue; |
1859 | if (!tomoyo_flush(head)) |
1860 | return false; |
1861 | switch (idx) { |
1862 | case TOMOYO_ID_TRANSITION_CONTROL: |
1863 | { |
1864 | struct tomoyo_transition_control *ptr = |
1865 | container_of(acl, typeof(*ptr), head); |
1866 | |
1867 | tomoyo_print_namespace(head); |
1868 | tomoyo_set_string(head, string: tomoyo_transition_type |
1869 | [ptr->type]); |
1870 | tomoyo_set_string(head, string: ptr->program ? |
1871 | ptr->program->name : "any" ); |
1872 | tomoyo_set_string(head, string: " from " ); |
1873 | tomoyo_set_string(head, string: ptr->domainname ? |
1874 | ptr->domainname->name : |
1875 | "any" ); |
1876 | } |
1877 | break; |
1878 | case TOMOYO_ID_AGGREGATOR: |
1879 | { |
1880 | struct tomoyo_aggregator *ptr = |
1881 | container_of(acl, typeof(*ptr), head); |
1882 | |
1883 | tomoyo_print_namespace(head); |
1884 | tomoyo_set_string(head, string: "aggregator " ); |
1885 | tomoyo_set_string(head, |
1886 | string: ptr->original_name->name); |
1887 | tomoyo_set_space(head); |
1888 | tomoyo_set_string(head, |
1889 | string: ptr->aggregated_name->name); |
1890 | } |
1891 | break; |
1892 | default: |
1893 | continue; |
1894 | } |
1895 | tomoyo_set_lf(head); |
1896 | } |
1897 | head->r.acl = NULL; |
1898 | return true; |
1899 | } |
1900 | |
1901 | /** |
1902 | * tomoyo_read_exception - Read exception policy. |
1903 | * |
1904 | * @head: Pointer to "struct tomoyo_io_buffer". |
1905 | * |
1906 | * Caller holds tomoyo_read_lock(). |
1907 | */ |
1908 | static void tomoyo_read_exception(struct tomoyo_io_buffer *head) |
1909 | { |
1910 | struct tomoyo_policy_namespace *ns = |
1911 | container_of(head->r.ns, typeof(*ns), namespace_list); |
1912 | |
1913 | if (head->r.eof) |
1914 | return; |
1915 | while (head->r.step < TOMOYO_MAX_POLICY && |
1916 | tomoyo_read_policy(head, idx: head->r.step)) |
1917 | head->r.step++; |
1918 | if (head->r.step < TOMOYO_MAX_POLICY) |
1919 | return; |
1920 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP && |
1921 | tomoyo_read_group(head, idx: head->r.step - TOMOYO_MAX_POLICY)) |
1922 | head->r.step++; |
1923 | if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP) |
1924 | return; |
1925 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP |
1926 | + TOMOYO_MAX_ACL_GROUPS) { |
1927 | head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY |
1928 | - TOMOYO_MAX_GROUP; |
1929 | if (!tomoyo_read_domain2(head, list: &ns->acl_group |
1930 | [head->r.acl_group_index])) |
1931 | return; |
1932 | head->r.step++; |
1933 | } |
1934 | head->r.eof = true; |
1935 | } |
1936 | |
1937 | /* Wait queue for kernel -> userspace notification. */ |
1938 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait); |
1939 | /* Wait queue for userspace -> kernel notification. */ |
1940 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait); |
1941 | |
1942 | /* Structure for query. */ |
1943 | struct tomoyo_query { |
1944 | struct list_head list; |
1945 | struct tomoyo_domain_info *domain; |
1946 | char *query; |
1947 | size_t query_len; |
1948 | unsigned int serial; |
1949 | u8 timer; |
1950 | u8 answer; |
1951 | u8 retry; |
1952 | }; |
1953 | |
1954 | /* The list for "struct tomoyo_query". */ |
1955 | static LIST_HEAD(tomoyo_query_list); |
1956 | |
1957 | /* Lock for manipulating tomoyo_query_list. */ |
1958 | static DEFINE_SPINLOCK(tomoyo_query_list_lock); |
1959 | |
1960 | /* |
1961 | * Number of "struct file" referring /sys/kernel/security/tomoyo/query |
1962 | * interface. |
1963 | */ |
1964 | static atomic_t tomoyo_query_observers = ATOMIC_INIT(0); |
1965 | |
1966 | /** |
1967 | * tomoyo_truncate - Truncate a line. |
1968 | * |
1969 | * @str: String to truncate. |
1970 | * |
1971 | * Returns length of truncated @str. |
1972 | */ |
1973 | static int tomoyo_truncate(char *str) |
1974 | { |
1975 | char *start = str; |
1976 | |
1977 | while (*(unsigned char *) str > (unsigned char) ' ') |
1978 | str++; |
1979 | *str = '\0'; |
1980 | return strlen(start) + 1; |
1981 | } |
1982 | |
1983 | /** |
1984 | * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode. |
1985 | * |
1986 | * @domain: Pointer to "struct tomoyo_domain_info". |
1987 | * @header: Lines containing ACL. |
1988 | * |
1989 | * Returns nothing. |
1990 | */ |
1991 | static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *) |
1992 | { |
1993 | char *buffer; |
1994 | char *realpath = NULL; |
1995 | char *argv0 = NULL; |
1996 | char *symlink = NULL; |
1997 | char *cp = strchr(header, '\n'); |
1998 | int len; |
1999 | |
2000 | if (!cp) |
2001 | return; |
2002 | cp = strchr(cp + 1, '\n'); |
2003 | if (!cp) |
2004 | return; |
2005 | *cp++ = '\0'; |
2006 | len = strlen(cp) + 1; |
2007 | /* strstr() will return NULL if ordering is wrong. */ |
2008 | if (*cp == 'f') { |
2009 | argv0 = strstr(header, " argv[]={ \"" ); |
2010 | if (argv0) { |
2011 | argv0 += 10; |
2012 | len += tomoyo_truncate(str: argv0) + 14; |
2013 | } |
2014 | realpath = strstr(header, " exec={ realpath=\"" ); |
2015 | if (realpath) { |
2016 | realpath += 8; |
2017 | len += tomoyo_truncate(str: realpath) + 6; |
2018 | } |
2019 | symlink = strstr(header, " symlink.target=\"" ); |
2020 | if (symlink) |
2021 | len += tomoyo_truncate(str: symlink + 1) + 1; |
2022 | } |
2023 | buffer = kmalloc(size: len, GFP_NOFS); |
2024 | if (!buffer) |
2025 | return; |
2026 | snprintf(buf: buffer, size: len - 1, fmt: "%s" , cp); |
2027 | if (realpath) |
2028 | tomoyo_addprintf(buffer, len, fmt: " exec.%s" , realpath); |
2029 | if (argv0) |
2030 | tomoyo_addprintf(buffer, len, fmt: " exec.argv[0]=%s" , argv0); |
2031 | if (symlink) |
2032 | tomoyo_addprintf(buffer, len, fmt: "%s" , symlink); |
2033 | tomoyo_normalize_line(buffer); |
2034 | if (!tomoyo_write_domain2(ns: domain->ns, list: &domain->acl_info_list, data: buffer, |
2035 | is_delete: false)) |
2036 | tomoyo_update_stat(index: TOMOYO_STAT_POLICY_UPDATES); |
2037 | kfree(objp: buffer); |
2038 | } |
2039 | |
2040 | /** |
2041 | * tomoyo_supervisor - Ask for the supervisor's decision. |
2042 | * |
2043 | * @r: Pointer to "struct tomoyo_request_info". |
2044 | * @fmt: The printf()'s format string, followed by parameters. |
2045 | * |
2046 | * Returns 0 if the supervisor decided to permit the access request which |
2047 | * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the |
2048 | * supervisor decided to retry the access request which violated the policy in |
2049 | * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise. |
2050 | */ |
2051 | int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...) |
2052 | { |
2053 | va_list args; |
2054 | int error; |
2055 | int len; |
2056 | static unsigned int tomoyo_serial; |
2057 | struct tomoyo_query entry = { }; |
2058 | bool quota_exceeded = false; |
2059 | |
2060 | va_start(args, fmt); |
2061 | len = vsnprintf(NULL, size: 0, fmt, args) + 1; |
2062 | va_end(args); |
2063 | /* Write /sys/kernel/security/tomoyo/audit. */ |
2064 | va_start(args, fmt); |
2065 | tomoyo_write_log2(r, len, fmt, args); |
2066 | va_end(args); |
2067 | /* Nothing more to do if granted. */ |
2068 | if (r->granted) |
2069 | return 0; |
2070 | if (r->mode) |
2071 | tomoyo_update_stat(index: r->mode); |
2072 | switch (r->mode) { |
2073 | case TOMOYO_CONFIG_ENFORCING: |
2074 | error = -EPERM; |
2075 | if (atomic_read(v: &tomoyo_query_observers)) |
2076 | break; |
2077 | goto out; |
2078 | case TOMOYO_CONFIG_LEARNING: |
2079 | error = 0; |
2080 | /* Check max_learning_entry parameter. */ |
2081 | if (tomoyo_domain_quota_is_ok(r)) |
2082 | break; |
2083 | fallthrough; |
2084 | default: |
2085 | return 0; |
2086 | } |
2087 | /* Get message. */ |
2088 | va_start(args, fmt); |
2089 | entry.query = tomoyo_init_log(r, len, fmt, args); |
2090 | va_end(args); |
2091 | if (!entry.query) |
2092 | goto out; |
2093 | entry.query_len = strlen(entry.query) + 1; |
2094 | if (!error) { |
2095 | tomoyo_add_entry(domain: r->domain, header: entry.query); |
2096 | goto out; |
2097 | } |
2098 | len = kmalloc_size_roundup(size: entry.query_len); |
2099 | entry.domain = r->domain; |
2100 | spin_lock(lock: &tomoyo_query_list_lock); |
2101 | if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] && |
2102 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len |
2103 | >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) { |
2104 | quota_exceeded = true; |
2105 | } else { |
2106 | entry.serial = tomoyo_serial++; |
2107 | entry.retry = r->retry; |
2108 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len; |
2109 | list_add_tail(new: &entry.list, head: &tomoyo_query_list); |
2110 | } |
2111 | spin_unlock(lock: &tomoyo_query_list_lock); |
2112 | if (quota_exceeded) |
2113 | goto out; |
2114 | /* Give 10 seconds for supervisor's opinion. */ |
2115 | while (entry.timer < 10) { |
2116 | wake_up_all(&tomoyo_query_wait); |
2117 | if (wait_event_interruptible_timeout |
2118 | (tomoyo_answer_wait, entry.answer || |
2119 | !atomic_read(&tomoyo_query_observers), HZ)) |
2120 | break; |
2121 | entry.timer++; |
2122 | } |
2123 | spin_lock(lock: &tomoyo_query_list_lock); |
2124 | list_del(entry: &entry.list); |
2125 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len; |
2126 | spin_unlock(lock: &tomoyo_query_list_lock); |
2127 | switch (entry.answer) { |
2128 | case 3: /* Asked to retry by administrator. */ |
2129 | error = TOMOYO_RETRY_REQUEST; |
2130 | r->retry++; |
2131 | break; |
2132 | case 1: |
2133 | /* Granted by administrator. */ |
2134 | error = 0; |
2135 | break; |
2136 | default: |
2137 | /* Timed out or rejected by administrator. */ |
2138 | break; |
2139 | } |
2140 | out: |
2141 | kfree(objp: entry.query); |
2142 | return error; |
2143 | } |
2144 | |
2145 | /** |
2146 | * tomoyo_find_domain_by_qid - Get domain by query id. |
2147 | * |
2148 | * @serial: Query ID assigned by tomoyo_supervisor(). |
2149 | * |
2150 | * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise. |
2151 | */ |
2152 | static struct tomoyo_domain_info *tomoyo_find_domain_by_qid |
2153 | (unsigned int serial) |
2154 | { |
2155 | struct tomoyo_query *ptr; |
2156 | struct tomoyo_domain_info *domain = NULL; |
2157 | |
2158 | spin_lock(lock: &tomoyo_query_list_lock); |
2159 | list_for_each_entry(ptr, &tomoyo_query_list, list) { |
2160 | if (ptr->serial != serial) |
2161 | continue; |
2162 | domain = ptr->domain; |
2163 | break; |
2164 | } |
2165 | spin_unlock(lock: &tomoyo_query_list_lock); |
2166 | return domain; |
2167 | } |
2168 | |
2169 | /** |
2170 | * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query. |
2171 | * |
2172 | * @file: Pointer to "struct file". |
2173 | * @wait: Pointer to "poll_table". |
2174 | * |
2175 | * Returns EPOLLIN | EPOLLRDNORM when ready to read, 0 otherwise. |
2176 | * |
2177 | * Waits for access requests which violated policy in enforcing mode. |
2178 | */ |
2179 | static __poll_t tomoyo_poll_query(struct file *file, poll_table *wait) |
2180 | { |
2181 | if (!list_empty(head: &tomoyo_query_list)) |
2182 | return EPOLLIN | EPOLLRDNORM; |
2183 | poll_wait(filp: file, wait_address: &tomoyo_query_wait, p: wait); |
2184 | if (!list_empty(head: &tomoyo_query_list)) |
2185 | return EPOLLIN | EPOLLRDNORM; |
2186 | return 0; |
2187 | } |
2188 | |
2189 | /** |
2190 | * tomoyo_read_query - Read access requests which violated policy in enforcing mode. |
2191 | * |
2192 | * @head: Pointer to "struct tomoyo_io_buffer". |
2193 | */ |
2194 | static void tomoyo_read_query(struct tomoyo_io_buffer *head) |
2195 | { |
2196 | struct list_head *tmp; |
2197 | unsigned int pos = 0; |
2198 | size_t len = 0; |
2199 | char *buf; |
2200 | |
2201 | if (head->r.w_pos) |
2202 | return; |
2203 | kfree(objp: head->read_buf); |
2204 | head->read_buf = NULL; |
2205 | spin_lock(lock: &tomoyo_query_list_lock); |
2206 | list_for_each(tmp, &tomoyo_query_list) { |
2207 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
2208 | |
2209 | if (pos++ != head->r.query_index) |
2210 | continue; |
2211 | len = ptr->query_len; |
2212 | break; |
2213 | } |
2214 | spin_unlock(lock: &tomoyo_query_list_lock); |
2215 | if (!len) { |
2216 | head->r.query_index = 0; |
2217 | return; |
2218 | } |
2219 | buf = kzalloc(size: len + 32, GFP_NOFS); |
2220 | if (!buf) |
2221 | return; |
2222 | pos = 0; |
2223 | spin_lock(lock: &tomoyo_query_list_lock); |
2224 | list_for_each(tmp, &tomoyo_query_list) { |
2225 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
2226 | |
2227 | if (pos++ != head->r.query_index) |
2228 | continue; |
2229 | /* |
2230 | * Some query can be skipped because tomoyo_query_list |
2231 | * can change, but I don't care. |
2232 | */ |
2233 | if (len == ptr->query_len) |
2234 | snprintf(buf, size: len + 31, fmt: "Q%u-%hu\n%s" , ptr->serial, |
2235 | ptr->retry, ptr->query); |
2236 | break; |
2237 | } |
2238 | spin_unlock(lock: &tomoyo_query_list_lock); |
2239 | if (buf[0]) { |
2240 | head->read_buf = buf; |
2241 | head->r.w[head->r.w_pos++] = buf; |
2242 | head->r.query_index++; |
2243 | } else { |
2244 | kfree(objp: buf); |
2245 | } |
2246 | } |
2247 | |
2248 | /** |
2249 | * tomoyo_write_answer - Write the supervisor's decision. |
2250 | * |
2251 | * @head: Pointer to "struct tomoyo_io_buffer". |
2252 | * |
2253 | * Returns 0 on success, -EINVAL otherwise. |
2254 | */ |
2255 | static int tomoyo_write_answer(struct tomoyo_io_buffer *head) |
2256 | { |
2257 | char *data = head->write_buf; |
2258 | struct list_head *tmp; |
2259 | unsigned int serial; |
2260 | unsigned int answer; |
2261 | |
2262 | spin_lock(lock: &tomoyo_query_list_lock); |
2263 | list_for_each(tmp, &tomoyo_query_list) { |
2264 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
2265 | |
2266 | ptr->timer = 0; |
2267 | } |
2268 | spin_unlock(lock: &tomoyo_query_list_lock); |
2269 | if (sscanf(data, "A%u=%u" , &serial, &answer) != 2) |
2270 | return -EINVAL; |
2271 | spin_lock(lock: &tomoyo_query_list_lock); |
2272 | list_for_each(tmp, &tomoyo_query_list) { |
2273 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
2274 | |
2275 | if (ptr->serial != serial) |
2276 | continue; |
2277 | ptr->answer = answer; |
2278 | /* Remove from tomoyo_query_list. */ |
2279 | if (ptr->answer) |
2280 | list_del_init(entry: &ptr->list); |
2281 | break; |
2282 | } |
2283 | spin_unlock(lock: &tomoyo_query_list_lock); |
2284 | return 0; |
2285 | } |
2286 | |
2287 | /** |
2288 | * tomoyo_read_version: Get version. |
2289 | * |
2290 | * @head: Pointer to "struct tomoyo_io_buffer". |
2291 | * |
2292 | * Returns version information. |
2293 | */ |
2294 | static void tomoyo_read_version(struct tomoyo_io_buffer *head) |
2295 | { |
2296 | if (!head->r.eof) { |
2297 | tomoyo_io_printf(head, fmt: "2.6.0" ); |
2298 | head->r.eof = true; |
2299 | } |
2300 | } |
2301 | |
2302 | /* String table for /sys/kernel/security/tomoyo/stat interface. */ |
2303 | static const char * const [TOMOYO_MAX_POLICY_STAT] = { |
2304 | [TOMOYO_STAT_POLICY_UPDATES] = "update:" , |
2305 | [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:" , |
2306 | [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:" , |
2307 | [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:" , |
2308 | }; |
2309 | |
2310 | /* String table for /sys/kernel/security/tomoyo/stat interface. */ |
2311 | static const char * const [TOMOYO_MAX_MEMORY_STAT] = { |
2312 | [TOMOYO_MEMORY_POLICY] = "policy:" , |
2313 | [TOMOYO_MEMORY_AUDIT] = "audit log:" , |
2314 | [TOMOYO_MEMORY_QUERY] = "query message:" , |
2315 | }; |
2316 | |
2317 | /* Counter for number of updates. */ |
2318 | static atomic_t tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT]; |
2319 | /* Timestamp counter for last updated. */ |
2320 | static time64_t tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT]; |
2321 | |
2322 | /** |
2323 | * tomoyo_update_stat - Update statistic counters. |
2324 | * |
2325 | * @index: Index for policy type. |
2326 | * |
2327 | * Returns nothing. |
2328 | */ |
2329 | void tomoyo_update_stat(const u8 index) |
2330 | { |
2331 | atomic_inc(v: &tomoyo_stat_updated[index]); |
2332 | tomoyo_stat_modified[index] = ktime_get_real_seconds(); |
2333 | } |
2334 | |
2335 | /** |
2336 | * tomoyo_read_stat - Read statistic data. |
2337 | * |
2338 | * @head: Pointer to "struct tomoyo_io_buffer". |
2339 | * |
2340 | * Returns nothing. |
2341 | */ |
2342 | static void tomoyo_read_stat(struct tomoyo_io_buffer *head) |
2343 | { |
2344 | u8 i; |
2345 | unsigned int total = 0; |
2346 | |
2347 | if (head->r.eof) |
2348 | return; |
2349 | for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) { |
2350 | tomoyo_io_printf(head, fmt: "Policy %-30s %10u" , |
2351 | tomoyo_policy_headers[i], |
2352 | atomic_read(v: &tomoyo_stat_updated[i])); |
2353 | if (tomoyo_stat_modified[i]) { |
2354 | struct tomoyo_time stamp; |
2355 | |
2356 | tomoyo_convert_time(time: tomoyo_stat_modified[i], stamp: &stamp); |
2357 | tomoyo_io_printf(head, fmt: " (Last: %04u/%02u/%02u %02u:%02u:%02u)" , |
2358 | stamp.year, stamp.month, stamp.day, |
2359 | stamp.hour, stamp.min, stamp.sec); |
2360 | } |
2361 | tomoyo_set_lf(head); |
2362 | } |
2363 | for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) { |
2364 | unsigned int used = tomoyo_memory_used[i]; |
2365 | |
2366 | total += used; |
2367 | tomoyo_io_printf(head, fmt: "Memory used by %-22s %10u" , |
2368 | tomoyo_memory_headers[i], used); |
2369 | used = tomoyo_memory_quota[i]; |
2370 | if (used) |
2371 | tomoyo_io_printf(head, fmt: " (Quota: %10u)" , used); |
2372 | tomoyo_set_lf(head); |
2373 | } |
2374 | tomoyo_io_printf(head, fmt: "Total memory used: %10u\n" , |
2375 | total); |
2376 | head->r.eof = true; |
2377 | } |
2378 | |
2379 | /** |
2380 | * tomoyo_write_stat - Set memory quota. |
2381 | * |
2382 | * @head: Pointer to "struct tomoyo_io_buffer". |
2383 | * |
2384 | * Returns 0. |
2385 | */ |
2386 | static int tomoyo_write_stat(struct tomoyo_io_buffer *head) |
2387 | { |
2388 | char *data = head->write_buf; |
2389 | u8 i; |
2390 | |
2391 | if (tomoyo_str_starts(src: &data, find: "Memory used by " )) |
2392 | for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) |
2393 | if (tomoyo_str_starts(src: &data, find: tomoyo_memory_headers[i])) |
2394 | sscanf(data, "%u" , &tomoyo_memory_quota[i]); |
2395 | return 0; |
2396 | } |
2397 | |
2398 | /** |
2399 | * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface. |
2400 | * |
2401 | * @type: Type of interface. |
2402 | * @file: Pointer to "struct file". |
2403 | * |
2404 | * Returns 0 on success, negative value otherwise. |
2405 | */ |
2406 | int tomoyo_open_control(const u8 type, struct file *file) |
2407 | { |
2408 | struct tomoyo_io_buffer *head = kzalloc(size: sizeof(*head), GFP_NOFS); |
2409 | |
2410 | if (!head) |
2411 | return -ENOMEM; |
2412 | mutex_init(&head->io_sem); |
2413 | head->type = type; |
2414 | switch (type) { |
2415 | case TOMOYO_DOMAINPOLICY: |
2416 | /* /sys/kernel/security/tomoyo/domain_policy */ |
2417 | head->write = tomoyo_write_domain; |
2418 | head->read = tomoyo_read_domain; |
2419 | break; |
2420 | case TOMOYO_EXCEPTIONPOLICY: |
2421 | /* /sys/kernel/security/tomoyo/exception_policy */ |
2422 | head->write = tomoyo_write_exception; |
2423 | head->read = tomoyo_read_exception; |
2424 | break; |
2425 | case TOMOYO_AUDIT: |
2426 | /* /sys/kernel/security/tomoyo/audit */ |
2427 | head->poll = tomoyo_poll_log; |
2428 | head->read = tomoyo_read_log; |
2429 | break; |
2430 | case TOMOYO_PROCESS_STATUS: |
2431 | /* /sys/kernel/security/tomoyo/.process_status */ |
2432 | head->write = tomoyo_write_pid; |
2433 | head->read = tomoyo_read_pid; |
2434 | break; |
2435 | case TOMOYO_VERSION: |
2436 | /* /sys/kernel/security/tomoyo/version */ |
2437 | head->read = tomoyo_read_version; |
2438 | head->readbuf_size = 128; |
2439 | break; |
2440 | case TOMOYO_STAT: |
2441 | /* /sys/kernel/security/tomoyo/stat */ |
2442 | head->write = tomoyo_write_stat; |
2443 | head->read = tomoyo_read_stat; |
2444 | head->readbuf_size = 1024; |
2445 | break; |
2446 | case TOMOYO_PROFILE: |
2447 | /* /sys/kernel/security/tomoyo/profile */ |
2448 | head->write = tomoyo_write_profile; |
2449 | head->read = tomoyo_read_profile; |
2450 | break; |
2451 | case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */ |
2452 | head->poll = tomoyo_poll_query; |
2453 | head->write = tomoyo_write_answer; |
2454 | head->read = tomoyo_read_query; |
2455 | break; |
2456 | case TOMOYO_MANAGER: |
2457 | /* /sys/kernel/security/tomoyo/manager */ |
2458 | head->write = tomoyo_write_manager; |
2459 | head->read = tomoyo_read_manager; |
2460 | break; |
2461 | } |
2462 | if (!(file->f_mode & FMODE_READ)) { |
2463 | /* |
2464 | * No need to allocate read_buf since it is not opened |
2465 | * for reading. |
2466 | */ |
2467 | head->read = NULL; |
2468 | head->poll = NULL; |
2469 | } else if (!head->poll) { |
2470 | /* Don't allocate read_buf for poll() access. */ |
2471 | if (!head->readbuf_size) |
2472 | head->readbuf_size = 4096 * 2; |
2473 | head->read_buf = kzalloc(size: head->readbuf_size, GFP_NOFS); |
2474 | if (!head->read_buf) { |
2475 | kfree(objp: head); |
2476 | return -ENOMEM; |
2477 | } |
2478 | } |
2479 | if (!(file->f_mode & FMODE_WRITE)) { |
2480 | /* |
2481 | * No need to allocate write_buf since it is not opened |
2482 | * for writing. |
2483 | */ |
2484 | head->write = NULL; |
2485 | } else if (head->write) { |
2486 | head->writebuf_size = 4096 * 2; |
2487 | head->write_buf = kzalloc(size: head->writebuf_size, GFP_NOFS); |
2488 | if (!head->write_buf) { |
2489 | kfree(objp: head->read_buf); |
2490 | kfree(objp: head); |
2491 | return -ENOMEM; |
2492 | } |
2493 | } |
2494 | /* |
2495 | * If the file is /sys/kernel/security/tomoyo/query , increment the |
2496 | * observer counter. |
2497 | * The obserber counter is used by tomoyo_supervisor() to see if |
2498 | * there is some process monitoring /sys/kernel/security/tomoyo/query. |
2499 | */ |
2500 | if (type == TOMOYO_QUERY) |
2501 | atomic_inc(v: &tomoyo_query_observers); |
2502 | file->private_data = head; |
2503 | tomoyo_notify_gc(head, is_register: true); |
2504 | return 0; |
2505 | } |
2506 | |
2507 | /** |
2508 | * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface. |
2509 | * |
2510 | * @file: Pointer to "struct file". |
2511 | * @wait: Pointer to "poll_table". Maybe NULL. |
2512 | * |
2513 | * Returns EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM if ready to read/write, |
2514 | * EPOLLOUT | EPOLLWRNORM otherwise. |
2515 | */ |
2516 | __poll_t tomoyo_poll_control(struct file *file, poll_table *wait) |
2517 | { |
2518 | struct tomoyo_io_buffer *head = file->private_data; |
2519 | |
2520 | if (head->poll) |
2521 | return head->poll(file, wait) | EPOLLOUT | EPOLLWRNORM; |
2522 | return EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM; |
2523 | } |
2524 | |
2525 | /** |
2526 | * tomoyo_set_namespace_cursor - Set namespace to read. |
2527 | * |
2528 | * @head: Pointer to "struct tomoyo_io_buffer". |
2529 | * |
2530 | * Returns nothing. |
2531 | */ |
2532 | static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head) |
2533 | { |
2534 | struct list_head *ns; |
2535 | |
2536 | if (head->type != TOMOYO_EXCEPTIONPOLICY && |
2537 | head->type != TOMOYO_PROFILE) |
2538 | return; |
2539 | /* |
2540 | * If this is the first read, or reading previous namespace finished |
2541 | * and has more namespaces to read, update the namespace cursor. |
2542 | */ |
2543 | ns = head->r.ns; |
2544 | if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) { |
2545 | /* Clearing is OK because tomoyo_flush() returned true. */ |
2546 | memset(&head->r, 0, sizeof(head->r)); |
2547 | head->r.ns = ns ? ns->next : tomoyo_namespace_list.next; |
2548 | } |
2549 | } |
2550 | |
2551 | /** |
2552 | * tomoyo_has_more_namespace - Check for unread namespaces. |
2553 | * |
2554 | * @head: Pointer to "struct tomoyo_io_buffer". |
2555 | * |
2556 | * Returns true if we have more entries to print, false otherwise. |
2557 | */ |
2558 | static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head) |
2559 | { |
2560 | return (head->type == TOMOYO_EXCEPTIONPOLICY || |
2561 | head->type == TOMOYO_PROFILE) && head->r.eof && |
2562 | head->r.ns->next != &tomoyo_namespace_list; |
2563 | } |
2564 | |
2565 | /** |
2566 | * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface. |
2567 | * |
2568 | * @head: Pointer to "struct tomoyo_io_buffer". |
2569 | * @buffer: Pointer to buffer to write to. |
2570 | * @buffer_len: Size of @buffer. |
2571 | * |
2572 | * Returns bytes read on success, negative value otherwise. |
2573 | */ |
2574 | ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer, |
2575 | const int buffer_len) |
2576 | { |
2577 | int len; |
2578 | int idx; |
2579 | |
2580 | if (!head->read) |
2581 | return -EINVAL; |
2582 | if (mutex_lock_interruptible(&head->io_sem)) |
2583 | return -EINTR; |
2584 | head->read_user_buf = buffer; |
2585 | head->read_user_buf_avail = buffer_len; |
2586 | idx = tomoyo_read_lock(); |
2587 | if (tomoyo_flush(head)) |
2588 | /* Call the policy handler. */ |
2589 | do { |
2590 | tomoyo_set_namespace_cursor(head); |
2591 | head->read(head); |
2592 | } while (tomoyo_flush(head) && |
2593 | tomoyo_has_more_namespace(head)); |
2594 | tomoyo_read_unlock(idx); |
2595 | len = head->read_user_buf - buffer; |
2596 | mutex_unlock(lock: &head->io_sem); |
2597 | return len; |
2598 | } |
2599 | |
2600 | /** |
2601 | * tomoyo_parse_policy - Parse a policy line. |
2602 | * |
2603 | * @head: Pointer to "struct tomoyo_io_buffer". |
2604 | * @line: Line to parse. |
2605 | * |
2606 | * Returns 0 on success, negative value otherwise. |
2607 | * |
2608 | * Caller holds tomoyo_read_lock(). |
2609 | */ |
2610 | static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line) |
2611 | { |
2612 | /* Delete request? */ |
2613 | head->w.is_delete = !strncmp(line, "delete " , 7); |
2614 | if (head->w.is_delete) |
2615 | memmove(line, line + 7, strlen(line + 7) + 1); |
2616 | /* Selecting namespace to update. */ |
2617 | if (head->type == TOMOYO_EXCEPTIONPOLICY || |
2618 | head->type == TOMOYO_PROFILE) { |
2619 | if (*line == '<') { |
2620 | char *cp = strchr(line, ' '); |
2621 | |
2622 | if (cp) { |
2623 | *cp++ = '\0'; |
2624 | head->w.ns = tomoyo_assign_namespace(domainname: line); |
2625 | memmove(line, cp, strlen(cp) + 1); |
2626 | } else |
2627 | head->w.ns = NULL; |
2628 | } else |
2629 | head->w.ns = &tomoyo_kernel_namespace; |
2630 | /* Don't allow updating if namespace is invalid. */ |
2631 | if (!head->w.ns) |
2632 | return -ENOENT; |
2633 | } |
2634 | /* Do the update. */ |
2635 | return head->write(head); |
2636 | } |
2637 | |
2638 | /** |
2639 | * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface. |
2640 | * |
2641 | * @head: Pointer to "struct tomoyo_io_buffer". |
2642 | * @buffer: Pointer to buffer to read from. |
2643 | * @buffer_len: Size of @buffer. |
2644 | * |
2645 | * Returns @buffer_len on success, negative value otherwise. |
2646 | */ |
2647 | ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head, |
2648 | const char __user *buffer, const int buffer_len) |
2649 | { |
2650 | int error = buffer_len; |
2651 | size_t avail_len = buffer_len; |
2652 | char *cp0 = head->write_buf; |
2653 | int idx; |
2654 | |
2655 | if (!head->write) |
2656 | return -EINVAL; |
2657 | if (mutex_lock_interruptible(&head->io_sem)) |
2658 | return -EINTR; |
2659 | head->read_user_buf_avail = 0; |
2660 | idx = tomoyo_read_lock(); |
2661 | /* Read a line and dispatch it to the policy handler. */ |
2662 | while (avail_len > 0) { |
2663 | char c; |
2664 | |
2665 | if (head->w.avail >= head->writebuf_size - 1) { |
2666 | const int len = head->writebuf_size * 2; |
2667 | char *cp = kzalloc(size: len, GFP_NOFS); |
2668 | |
2669 | if (!cp) { |
2670 | error = -ENOMEM; |
2671 | break; |
2672 | } |
2673 | memmove(cp, cp0, head->w.avail); |
2674 | kfree(objp: cp0); |
2675 | head->write_buf = cp; |
2676 | cp0 = cp; |
2677 | head->writebuf_size = len; |
2678 | } |
2679 | if (get_user(c, buffer)) { |
2680 | error = -EFAULT; |
2681 | break; |
2682 | } |
2683 | buffer++; |
2684 | avail_len--; |
2685 | cp0[head->w.avail++] = c; |
2686 | if (c != '\n') |
2687 | continue; |
2688 | cp0[head->w.avail - 1] = '\0'; |
2689 | head->w.avail = 0; |
2690 | tomoyo_normalize_line(buffer: cp0); |
2691 | if (!strcmp(cp0, "reset" )) { |
2692 | head->w.ns = &tomoyo_kernel_namespace; |
2693 | head->w.domain = NULL; |
2694 | memset(&head->r, 0, sizeof(head->r)); |
2695 | continue; |
2696 | } |
2697 | /* Don't allow updating policies by non manager programs. */ |
2698 | switch (head->type) { |
2699 | case TOMOYO_PROCESS_STATUS: |
2700 | /* This does not write anything. */ |
2701 | break; |
2702 | case TOMOYO_DOMAINPOLICY: |
2703 | if (tomoyo_select_domain(head, data: cp0)) |
2704 | continue; |
2705 | fallthrough; |
2706 | case TOMOYO_EXCEPTIONPOLICY: |
2707 | if (!strcmp(cp0, "select transition_only" )) { |
2708 | head->r.print_transition_related_only = true; |
2709 | continue; |
2710 | } |
2711 | fallthrough; |
2712 | default: |
2713 | if (!tomoyo_manager()) { |
2714 | error = -EPERM; |
2715 | goto out; |
2716 | } |
2717 | } |
2718 | switch (tomoyo_parse_policy(head, line: cp0)) { |
2719 | case -EPERM: |
2720 | error = -EPERM; |
2721 | goto out; |
2722 | case 0: |
2723 | switch (head->type) { |
2724 | case TOMOYO_DOMAINPOLICY: |
2725 | case TOMOYO_EXCEPTIONPOLICY: |
2726 | case TOMOYO_STAT: |
2727 | case TOMOYO_PROFILE: |
2728 | case TOMOYO_MANAGER: |
2729 | tomoyo_update_stat(index: TOMOYO_STAT_POLICY_UPDATES); |
2730 | break; |
2731 | default: |
2732 | break; |
2733 | } |
2734 | break; |
2735 | } |
2736 | } |
2737 | out: |
2738 | tomoyo_read_unlock(idx); |
2739 | mutex_unlock(lock: &head->io_sem); |
2740 | return error; |
2741 | } |
2742 | |
2743 | /** |
2744 | * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface. |
2745 | * |
2746 | * @head: Pointer to "struct tomoyo_io_buffer". |
2747 | */ |
2748 | void tomoyo_close_control(struct tomoyo_io_buffer *head) |
2749 | { |
2750 | /* |
2751 | * If the file is /sys/kernel/security/tomoyo/query , decrement the |
2752 | * observer counter. |
2753 | */ |
2754 | if (head->type == TOMOYO_QUERY && |
2755 | atomic_dec_and_test(v: &tomoyo_query_observers)) |
2756 | wake_up_all(&tomoyo_answer_wait); |
2757 | tomoyo_notify_gc(head, is_register: false); |
2758 | } |
2759 | |
2760 | /** |
2761 | * tomoyo_check_profile - Check all profiles currently assigned to domains are defined. |
2762 | */ |
2763 | void tomoyo_check_profile(void) |
2764 | { |
2765 | struct tomoyo_domain_info *domain; |
2766 | const int idx = tomoyo_read_lock(); |
2767 | |
2768 | tomoyo_policy_loaded = true; |
2769 | pr_info("TOMOYO: 2.6.0\n" ); |
2770 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list, |
2771 | srcu_read_lock_held(&tomoyo_ss)) { |
2772 | const u8 profile = domain->profile; |
2773 | struct tomoyo_policy_namespace *ns = domain->ns; |
2774 | |
2775 | if (ns->profile_version == 20110903) { |
2776 | pr_info_once("Converting profile version from %u to %u.\n" , |
2777 | 20110903, 20150505); |
2778 | ns->profile_version = 20150505; |
2779 | } |
2780 | if (ns->profile_version != 20150505) |
2781 | pr_err("Profile version %u is not supported.\n" , |
2782 | ns->profile_version); |
2783 | else if (!ns->profile_ptr[profile]) |
2784 | pr_err("Profile %u (used by '%s') is not defined.\n" , |
2785 | profile, domain->domainname->name); |
2786 | else |
2787 | continue; |
2788 | pr_err("Userland tools for TOMOYO 2.6 must be installed and policy must be initialized.\n" ); |
2789 | pr_err("Please see https://tomoyo.osdn.jp/2.6/ for more information.\n" ); |
2790 | panic(fmt: "STOP!" ); |
2791 | } |
2792 | tomoyo_read_unlock(idx); |
2793 | pr_info("Mandatory Access Control activated.\n" ); |
2794 | } |
2795 | |
2796 | /** |
2797 | * tomoyo_load_builtin_policy - Load built-in policy. |
2798 | * |
2799 | * Returns nothing. |
2800 | */ |
2801 | void __init tomoyo_load_builtin_policy(void) |
2802 | { |
2803 | #ifdef CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING |
2804 | static char tomoyo_builtin_profile[] __initdata = |
2805 | "PROFILE_VERSION=20150505\n" |
2806 | "0-CONFIG={ mode=learning grant_log=no reject_log=yes }\n" ; |
2807 | static char tomoyo_builtin_exception_policy[] __initdata = |
2808 | "aggregator proc:/self/exe /proc/self/exe\n" ; |
2809 | static char tomoyo_builtin_domain_policy[] __initdata = "" ; |
2810 | static char tomoyo_builtin_manager[] __initdata = "" ; |
2811 | static char tomoyo_builtin_stat[] __initdata = "" ; |
2812 | #else |
2813 | /* |
2814 | * This include file is manually created and contains built-in policy |
2815 | * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy", |
2816 | * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager", |
2817 | * "tomoyo_builtin_stat" in the form of "static char [] __initdata". |
2818 | */ |
2819 | #include "builtin-policy.h" |
2820 | #endif |
2821 | u8 i; |
2822 | const int idx = tomoyo_read_lock(); |
2823 | |
2824 | for (i = 0; i < 5; i++) { |
2825 | struct tomoyo_io_buffer head = { }; |
2826 | char *start = "" ; |
2827 | |
2828 | switch (i) { |
2829 | case 0: |
2830 | start = tomoyo_builtin_profile; |
2831 | head.type = TOMOYO_PROFILE; |
2832 | head.write = tomoyo_write_profile; |
2833 | break; |
2834 | case 1: |
2835 | start = tomoyo_builtin_exception_policy; |
2836 | head.type = TOMOYO_EXCEPTIONPOLICY; |
2837 | head.write = tomoyo_write_exception; |
2838 | break; |
2839 | case 2: |
2840 | start = tomoyo_builtin_domain_policy; |
2841 | head.type = TOMOYO_DOMAINPOLICY; |
2842 | head.write = tomoyo_write_domain; |
2843 | break; |
2844 | case 3: |
2845 | start = tomoyo_builtin_manager; |
2846 | head.type = TOMOYO_MANAGER; |
2847 | head.write = tomoyo_write_manager; |
2848 | break; |
2849 | case 4: |
2850 | start = tomoyo_builtin_stat; |
2851 | head.type = TOMOYO_STAT; |
2852 | head.write = tomoyo_write_stat; |
2853 | break; |
2854 | } |
2855 | while (1) { |
2856 | char *end = strchr(start, '\n'); |
2857 | |
2858 | if (!end) |
2859 | break; |
2860 | *end = '\0'; |
2861 | tomoyo_normalize_line(buffer: start); |
2862 | head.write_buf = start; |
2863 | tomoyo_parse_policy(head: &head, line: start); |
2864 | start = end + 1; |
2865 | } |
2866 | } |
2867 | tomoyo_read_unlock(idx); |
2868 | #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER |
2869 | tomoyo_check_profile(); |
2870 | #endif |
2871 | } |
2872 | |