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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
9590837b KT |
2 | /* |
3 | * security/tomoyo/common.c | |
4 | * | |
0f2a55d5 | 5 | * Copyright (C) 2005-2011 NTT DATA CORPORATION |
9590837b KT |
6 | */ |
7 | ||
8 | #include <linux/uaccess.h> | |
5a0e3ad6 | 9 | #include <linux/slab.h> |
9590837b | 10 | #include <linux/security.h> |
9590837b | 11 | #include "common.h" |
9590837b | 12 | |
eadd99cc TH |
13 | /* String table for operation mode. */ |
14 | const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = { | |
15 | [TOMOYO_CONFIG_DISABLED] = "disabled", | |
16 | [TOMOYO_CONFIG_LEARNING] = "learning", | |
17 | [TOMOYO_CONFIG_PERMISSIVE] = "permissive", | |
18 | [TOMOYO_CONFIG_ENFORCING] = "enforcing" | |
9590837b | 19 | }; |
9590837b | 20 | |
57c2590f | 21 | /* String table for /sys/kernel/security/tomoyo/profile */ |
2c47ab93 | 22 | const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX |
57c2590f | 23 | + TOMOYO_MAX_MAC_CATEGORY_INDEX] = { |
d58e0da8 | 24 | /* CONFIG::file group */ |
2c47ab93 TH |
25 | [TOMOYO_MAC_FILE_EXECUTE] = "execute", |
26 | [TOMOYO_MAC_FILE_OPEN] = "open", | |
27 | [TOMOYO_MAC_FILE_CREATE] = "create", | |
28 | [TOMOYO_MAC_FILE_UNLINK] = "unlink", | |
29 | [TOMOYO_MAC_FILE_GETATTR] = "getattr", | |
30 | [TOMOYO_MAC_FILE_MKDIR] = "mkdir", | |
31 | [TOMOYO_MAC_FILE_RMDIR] = "rmdir", | |
32 | [TOMOYO_MAC_FILE_MKFIFO] = "mkfifo", | |
33 | [TOMOYO_MAC_FILE_MKSOCK] = "mksock", | |
34 | [TOMOYO_MAC_FILE_TRUNCATE] = "truncate", | |
35 | [TOMOYO_MAC_FILE_SYMLINK] = "symlink", | |
36 | [TOMOYO_MAC_FILE_MKBLOCK] = "mkblock", | |
37 | [TOMOYO_MAC_FILE_MKCHAR] = "mkchar", | |
38 | [TOMOYO_MAC_FILE_LINK] = "link", | |
39 | [TOMOYO_MAC_FILE_RENAME] = "rename", | |
40 | [TOMOYO_MAC_FILE_CHMOD] = "chmod", | |
41 | [TOMOYO_MAC_FILE_CHOWN] = "chown", | |
42 | [TOMOYO_MAC_FILE_CHGRP] = "chgrp", | |
43 | [TOMOYO_MAC_FILE_IOCTL] = "ioctl", | |
44 | [TOMOYO_MAC_FILE_CHROOT] = "chroot", | |
45 | [TOMOYO_MAC_FILE_MOUNT] = "mount", | |
46 | [TOMOYO_MAC_FILE_UMOUNT] = "unmount", | |
47 | [TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root", | |
059d84db TH |
48 | /* CONFIG::network group */ |
49 | [TOMOYO_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind", | |
50 | [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen", | |
51 | [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect", | |
52 | [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind", | |
53 | [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send", | |
54 | [TOMOYO_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind", | |
55 | [TOMOYO_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send", | |
56 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind", | |
57 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen", | |
58 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect", | |
59 | [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind", | |
60 | [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send", | |
61 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind", | |
62 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen", | |
63 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect", | |
d58e0da8 TH |
64 | /* CONFIG::misc group */ |
65 | [TOMOYO_MAC_ENVIRON] = "env", | |
66 | /* CONFIG group */ | |
57c2590f | 67 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file", |
059d84db | 68 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_NETWORK] = "network", |
d58e0da8 | 69 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_MISC] = "misc", |
9590837b KT |
70 | }; |
71 | ||
2066a361 TH |
72 | /* String table for conditions. */ |
73 | const char * const tomoyo_condition_keyword[TOMOYO_MAX_CONDITION_KEYWORD] = { | |
74 | [TOMOYO_TASK_UID] = "task.uid", | |
75 | [TOMOYO_TASK_EUID] = "task.euid", | |
76 | [TOMOYO_TASK_SUID] = "task.suid", | |
77 | [TOMOYO_TASK_FSUID] = "task.fsuid", | |
78 | [TOMOYO_TASK_GID] = "task.gid", | |
79 | [TOMOYO_TASK_EGID] = "task.egid", | |
80 | [TOMOYO_TASK_SGID] = "task.sgid", | |
81 | [TOMOYO_TASK_FSGID] = "task.fsgid", | |
82 | [TOMOYO_TASK_PID] = "task.pid", | |
83 | [TOMOYO_TASK_PPID] = "task.ppid", | |
5b636857 TH |
84 | [TOMOYO_EXEC_ARGC] = "exec.argc", |
85 | [TOMOYO_EXEC_ENVC] = "exec.envc", | |
8761afd4 TH |
86 | [TOMOYO_TYPE_IS_SOCKET] = "socket", |
87 | [TOMOYO_TYPE_IS_SYMLINK] = "symlink", | |
88 | [TOMOYO_TYPE_IS_FILE] = "file", | |
89 | [TOMOYO_TYPE_IS_BLOCK_DEV] = "block", | |
90 | [TOMOYO_TYPE_IS_DIRECTORY] = "directory", | |
91 | [TOMOYO_TYPE_IS_CHAR_DEV] = "char", | |
92 | [TOMOYO_TYPE_IS_FIFO] = "fifo", | |
93 | [TOMOYO_MODE_SETUID] = "setuid", | |
94 | [TOMOYO_MODE_SETGID] = "setgid", | |
95 | [TOMOYO_MODE_STICKY] = "sticky", | |
96 | [TOMOYO_MODE_OWNER_READ] = "owner_read", | |
97 | [TOMOYO_MODE_OWNER_WRITE] = "owner_write", | |
98 | [TOMOYO_MODE_OWNER_EXECUTE] = "owner_execute", | |
99 | [TOMOYO_MODE_GROUP_READ] = "group_read", | |
100 | [TOMOYO_MODE_GROUP_WRITE] = "group_write", | |
101 | [TOMOYO_MODE_GROUP_EXECUTE] = "group_execute", | |
102 | [TOMOYO_MODE_OTHERS_READ] = "others_read", | |
103 | [TOMOYO_MODE_OTHERS_WRITE] = "others_write", | |
104 | [TOMOYO_MODE_OTHERS_EXECUTE] = "others_execute", | |
2ca9bf45 TH |
105 | [TOMOYO_EXEC_REALPATH] = "exec.realpath", |
106 | [TOMOYO_SYMLINK_TARGET] = "symlink.target", | |
8761afd4 TH |
107 | [TOMOYO_PATH1_UID] = "path1.uid", |
108 | [TOMOYO_PATH1_GID] = "path1.gid", | |
109 | [TOMOYO_PATH1_INO] = "path1.ino", | |
110 | [TOMOYO_PATH1_MAJOR] = "path1.major", | |
111 | [TOMOYO_PATH1_MINOR] = "path1.minor", | |
112 | [TOMOYO_PATH1_PERM] = "path1.perm", | |
113 | [TOMOYO_PATH1_TYPE] = "path1.type", | |
114 | [TOMOYO_PATH1_DEV_MAJOR] = "path1.dev_major", | |
115 | [TOMOYO_PATH1_DEV_MINOR] = "path1.dev_minor", | |
116 | [TOMOYO_PATH2_UID] = "path2.uid", | |
117 | [TOMOYO_PATH2_GID] = "path2.gid", | |
118 | [TOMOYO_PATH2_INO] = "path2.ino", | |
119 | [TOMOYO_PATH2_MAJOR] = "path2.major", | |
120 | [TOMOYO_PATH2_MINOR] = "path2.minor", | |
121 | [TOMOYO_PATH2_PERM] = "path2.perm", | |
122 | [TOMOYO_PATH2_TYPE] = "path2.type", | |
123 | [TOMOYO_PATH2_DEV_MAJOR] = "path2.dev_major", | |
124 | [TOMOYO_PATH2_DEV_MINOR] = "path2.dev_minor", | |
125 | [TOMOYO_PATH1_PARENT_UID] = "path1.parent.uid", | |
126 | [TOMOYO_PATH1_PARENT_GID] = "path1.parent.gid", | |
127 | [TOMOYO_PATH1_PARENT_INO] = "path1.parent.ino", | |
128 | [TOMOYO_PATH1_PARENT_PERM] = "path1.parent.perm", | |
129 | [TOMOYO_PATH2_PARENT_UID] = "path2.parent.uid", | |
130 | [TOMOYO_PATH2_PARENT_GID] = "path2.parent.gid", | |
131 | [TOMOYO_PATH2_PARENT_INO] = "path2.parent.ino", | |
132 | [TOMOYO_PATH2_PARENT_PERM] = "path2.parent.perm", | |
2066a361 TH |
133 | }; |
134 | ||
d5ca1725 TH |
135 | /* String table for PREFERENCE keyword. */ |
136 | static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = { | |
eadd99cc | 137 | [TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log", |
d5ca1725 TH |
138 | [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry", |
139 | }; | |
140 | ||
2c47ab93 TH |
141 | /* String table for path operation. */ |
142 | const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = { | |
143 | [TOMOYO_TYPE_EXECUTE] = "execute", | |
144 | [TOMOYO_TYPE_READ] = "read", | |
145 | [TOMOYO_TYPE_WRITE] = "write", | |
146 | [TOMOYO_TYPE_APPEND] = "append", | |
147 | [TOMOYO_TYPE_UNLINK] = "unlink", | |
148 | [TOMOYO_TYPE_GETATTR] = "getattr", | |
149 | [TOMOYO_TYPE_RMDIR] = "rmdir", | |
150 | [TOMOYO_TYPE_TRUNCATE] = "truncate", | |
151 | [TOMOYO_TYPE_SYMLINK] = "symlink", | |
152 | [TOMOYO_TYPE_CHROOT] = "chroot", | |
153 | [TOMOYO_TYPE_UMOUNT] = "unmount", | |
154 | }; | |
155 | ||
059d84db TH |
156 | /* String table for socket's operation. */ |
157 | const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION] = { | |
158 | [TOMOYO_NETWORK_BIND] = "bind", | |
159 | [TOMOYO_NETWORK_LISTEN] = "listen", | |
160 | [TOMOYO_NETWORK_CONNECT] = "connect", | |
161 | [TOMOYO_NETWORK_SEND] = "send", | |
162 | }; | |
163 | ||
2c47ab93 TH |
164 | /* String table for categories. */ |
165 | static const char * const tomoyo_category_keywords | |
166 | [TOMOYO_MAX_MAC_CATEGORY_INDEX] = { | |
059d84db TH |
167 | [TOMOYO_MAC_CATEGORY_FILE] = "file", |
168 | [TOMOYO_MAC_CATEGORY_NETWORK] = "network", | |
169 | [TOMOYO_MAC_CATEGORY_MISC] = "misc", | |
2c47ab93 TH |
170 | }; |
171 | ||
9590837b KT |
172 | /* Permit policy management by non-root user? */ |
173 | static bool tomoyo_manage_by_non_root; | |
174 | ||
175 | /* Utility functions. */ | |
176 | ||
57c2590f TH |
177 | /** |
178 | * tomoyo_yesno - Return "yes" or "no". | |
179 | * | |
180 | * @value: Bool value. | |
181 | */ | |
eadd99cc | 182 | const char *tomoyo_yesno(const unsigned int value) |
57c2590f TH |
183 | { |
184 | return value ? "yes" : "no"; | |
185 | } | |
186 | ||
d5ca1725 TH |
187 | /** |
188 | * tomoyo_addprintf - strncat()-like-snprintf(). | |
189 | * | |
190 | * @buffer: Buffer to write to. Must be '\0'-terminated. | |
191 | * @len: Size of @buffer. | |
192 | * @fmt: The printf()'s format string, followed by parameters. | |
193 | * | |
194 | * Returns nothing. | |
195 | */ | |
f23571e8 TH |
196 | static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...) |
197 | { | |
198 | va_list args; | |
199 | const int pos = strlen(buffer); | |
cdcf6723 | 200 | |
f23571e8 TH |
201 | va_start(args, fmt); |
202 | vsnprintf(buffer + pos, len - pos - 1, fmt, args); | |
203 | va_end(args); | |
204 | } | |
205 | ||
7762fbff | 206 | /** |
f23571e8 | 207 | * tomoyo_flush - Flush queued string to userspace's buffer. |
7762fbff | 208 | * |
f23571e8 | 209 | * @head: Pointer to "struct tomoyo_io_buffer". |
7762fbff | 210 | * |
f23571e8 | 211 | * Returns true if all data was flushed, false otherwise. |
7762fbff | 212 | */ |
f23571e8 | 213 | static bool tomoyo_flush(struct tomoyo_io_buffer *head) |
7762fbff | 214 | { |
f23571e8 TH |
215 | while (head->r.w_pos) { |
216 | const char *w = head->r.w[0]; | |
2c47ab93 | 217 | size_t len = strlen(w); |
cdcf6723 | 218 | |
f23571e8 TH |
219 | if (len) { |
220 | if (len > head->read_user_buf_avail) | |
221 | len = head->read_user_buf_avail; | |
222 | if (!len) | |
223 | return false; | |
224 | if (copy_to_user(head->read_user_buf, w, len)) | |
225 | return false; | |
226 | head->read_user_buf_avail -= len; | |
227 | head->read_user_buf += len; | |
228 | w += len; | |
229 | } | |
c0fa797a TH |
230 | head->r.w[0] = w; |
231 | if (*w) | |
f23571e8 | 232 | return false; |
eadd99cc | 233 | /* Add '\0' for audit logs and query. */ |
f23571e8 TH |
234 | if (head->poll) { |
235 | if (!head->read_user_buf_avail || | |
236 | copy_to_user(head->read_user_buf, "", 1)) | |
237 | return false; | |
238 | head->read_user_buf_avail--; | |
239 | head->read_user_buf++; | |
240 | } | |
241 | head->r.w_pos--; | |
242 | for (len = 0; len < head->r.w_pos; len++) | |
243 | head->r.w[len] = head->r.w[len + 1]; | |
244 | } | |
245 | head->r.avail = 0; | |
246 | return true; | |
7762fbff TH |
247 | } |
248 | ||
4c3e9e2d | 249 | /** |
f23571e8 | 250 | * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure. |
4c3e9e2d | 251 | * |
f23571e8 TH |
252 | * @head: Pointer to "struct tomoyo_io_buffer". |
253 | * @string: String to print. | |
4c3e9e2d | 254 | * |
f23571e8 TH |
255 | * Note that @string has to be kept valid until @head is kfree()d. |
256 | * This means that char[] allocated on stack memory cannot be passed to | |
257 | * this function. Use tomoyo_io_printf() for char[] allocated on stack memory. | |
4c3e9e2d | 258 | */ |
f23571e8 | 259 | static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string) |
4c3e9e2d | 260 | { |
f23571e8 TH |
261 | if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) { |
262 | head->r.w[head->r.w_pos++] = string; | |
263 | tomoyo_flush(head); | |
264 | } else | |
265 | WARN_ON(1); | |
4c3e9e2d TH |
266 | } |
267 | ||
778c4a4d TH |
268 | static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, |
269 | ...) __printf(2, 3); | |
270 | ||
9590837b | 271 | /** |
f23571e8 | 272 | * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure. |
9590837b KT |
273 | * |
274 | * @head: Pointer to "struct tomoyo_io_buffer". | |
275 | * @fmt: The printf()'s format string, followed by parameters. | |
9590837b | 276 | */ |
778c4a4d TH |
277 | static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, |
278 | ...) | |
9590837b KT |
279 | { |
280 | va_list args; | |
2c47ab93 TH |
281 | size_t len; |
282 | size_t pos = head->r.avail; | |
9590837b | 283 | int size = head->readbuf_size - pos; |
cdcf6723 | 284 | |
9590837b | 285 | if (size <= 0) |
f23571e8 | 286 | return; |
9590837b | 287 | va_start(args, fmt); |
f23571e8 | 288 | len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1; |
9590837b | 289 | va_end(args); |
f23571e8 TH |
290 | if (pos + len >= head->readbuf_size) { |
291 | WARN_ON(1); | |
292 | return; | |
293 | } | |
294 | head->r.avail += len; | |
295 | tomoyo_set_string(head, head->read_buf + pos); | |
296 | } | |
297 | ||
0d2171d7 TH |
298 | /** |
299 | * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure. | |
300 | * | |
301 | * @head: Pointer to "struct tomoyo_io_buffer". | |
302 | * | |
303 | * Returns nothing. | |
304 | */ | |
f23571e8 TH |
305 | static void tomoyo_set_space(struct tomoyo_io_buffer *head) |
306 | { | |
307 | tomoyo_set_string(head, " "); | |
308 | } | |
309 | ||
0d2171d7 TH |
310 | /** |
311 | * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure. | |
312 | * | |
313 | * @head: Pointer to "struct tomoyo_io_buffer". | |
314 | * | |
315 | * Returns nothing. | |
316 | */ | |
f23571e8 TH |
317 | static bool tomoyo_set_lf(struct tomoyo_io_buffer *head) |
318 | { | |
319 | tomoyo_set_string(head, "\n"); | |
320 | return !head->r.w_pos; | |
321 | } | |
322 | ||
0d2171d7 TH |
323 | /** |
324 | * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure. | |
325 | * | |
326 | * @head: Pointer to "struct tomoyo_io_buffer". | |
327 | * | |
328 | * Returns nothing. | |
329 | */ | |
330 | static void tomoyo_set_slash(struct tomoyo_io_buffer *head) | |
331 | { | |
332 | tomoyo_set_string(head, "/"); | |
333 | } | |
334 | ||
bd03a3e4 TH |
335 | /* List of namespaces. */ |
336 | LIST_HEAD(tomoyo_namespace_list); | |
337 | /* True if namespace other than tomoyo_kernel_namespace is defined. */ | |
338 | static bool tomoyo_namespace_enabled; | |
339 | ||
340 | /** | |
341 | * tomoyo_init_policy_namespace - Initialize namespace. | |
342 | * | |
343 | * @ns: Pointer to "struct tomoyo_policy_namespace". | |
344 | * | |
345 | * Returns nothing. | |
346 | */ | |
347 | void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns) | |
348 | { | |
349 | unsigned int idx; | |
cdcf6723 | 350 | |
bd03a3e4 TH |
351 | for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++) |
352 | INIT_LIST_HEAD(&ns->acl_group[idx]); | |
353 | for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++) | |
354 | INIT_LIST_HEAD(&ns->group_list[idx]); | |
355 | for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++) | |
356 | INIT_LIST_HEAD(&ns->policy_list[idx]); | |
861f4bcf | 357 | ns->profile_version = 20150505; |
bd03a3e4 TH |
358 | tomoyo_namespace_enabled = !list_empty(&tomoyo_namespace_list); |
359 | list_add_tail_rcu(&ns->namespace_list, &tomoyo_namespace_list); | |
360 | } | |
361 | ||
362 | /** | |
363 | * tomoyo_print_namespace - Print namespace header. | |
364 | * | |
365 | * @head: Pointer to "struct tomoyo_io_buffer". | |
366 | * | |
367 | * Returns nothing. | |
368 | */ | |
369 | static void tomoyo_print_namespace(struct tomoyo_io_buffer *head) | |
370 | { | |
371 | if (!tomoyo_namespace_enabled) | |
372 | return; | |
373 | tomoyo_set_string(head, | |
374 | container_of(head->r.ns, | |
375 | struct tomoyo_policy_namespace, | |
376 | namespace_list)->name); | |
377 | tomoyo_set_space(head); | |
378 | } | |
379 | ||
f23571e8 TH |
380 | /** |
381 | * tomoyo_print_name_union - Print a tomoyo_name_union. | |
382 | * | |
383 | * @head: Pointer to "struct tomoyo_io_buffer". | |
384 | * @ptr: Pointer to "struct tomoyo_name_union". | |
385 | */ | |
386 | static void tomoyo_print_name_union(struct tomoyo_io_buffer *head, | |
387 | const struct tomoyo_name_union *ptr) | |
388 | { | |
389 | tomoyo_set_space(head); | |
0df7e8b8 | 390 | if (ptr->group) { |
f23571e8 TH |
391 | tomoyo_set_string(head, "@"); |
392 | tomoyo_set_string(head, ptr->group->group_name->name); | |
393 | } else { | |
394 | tomoyo_set_string(head, ptr->filename->name); | |
395 | } | |
396 | } | |
397 | ||
2ca9bf45 TH |
398 | /** |
399 | * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote. | |
400 | * | |
401 | * @head: Pointer to "struct tomoyo_io_buffer". | |
402 | * @ptr: Pointer to "struct tomoyo_name_union". | |
403 | * | |
404 | * Returns nothing. | |
405 | */ | |
406 | static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer *head, | |
407 | const struct tomoyo_name_union *ptr) | |
408 | { | |
409 | if (ptr->group) { | |
410 | tomoyo_set_string(head, "@"); | |
411 | tomoyo_set_string(head, ptr->group->group_name->name); | |
412 | } else { | |
413 | tomoyo_set_string(head, "\""); | |
414 | tomoyo_set_string(head, ptr->filename->name); | |
415 | tomoyo_set_string(head, "\""); | |
416 | } | |
417 | } | |
418 | ||
f23571e8 | 419 | /** |
2066a361 | 420 | * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space. |
f23571e8 | 421 | * |
2066a361 TH |
422 | * @head: Pointer to "struct tomoyo_io_buffer". |
423 | * @ptr: Pointer to "struct tomoyo_number_union". | |
424 | * | |
425 | * Returns nothing. | |
f23571e8 | 426 | */ |
2066a361 TH |
427 | static void tomoyo_print_number_union_nospace |
428 | (struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr) | |
f23571e8 | 429 | { |
0df7e8b8 | 430 | if (ptr->group) { |
f23571e8 TH |
431 | tomoyo_set_string(head, "@"); |
432 | tomoyo_set_string(head, ptr->group->group_name->name); | |
433 | } else { | |
434 | int i; | |
435 | unsigned long min = ptr->values[0]; | |
436 | const unsigned long max = ptr->values[1]; | |
0df7e8b8 TH |
437 | u8 min_type = ptr->value_type[0]; |
438 | const u8 max_type = ptr->value_type[1]; | |
f23571e8 | 439 | char buffer[128]; |
cdcf6723 | 440 | |
f23571e8 TH |
441 | buffer[0] = '\0'; |
442 | for (i = 0; i < 2; i++) { | |
443 | switch (min_type) { | |
444 | case TOMOYO_VALUE_TYPE_HEXADECIMAL: | |
445 | tomoyo_addprintf(buffer, sizeof(buffer), | |
446 | "0x%lX", min); | |
447 | break; | |
448 | case TOMOYO_VALUE_TYPE_OCTAL: | |
449 | tomoyo_addprintf(buffer, sizeof(buffer), | |
450 | "0%lo", min); | |
451 | break; | |
452 | default: | |
2066a361 TH |
453 | tomoyo_addprintf(buffer, sizeof(buffer), "%lu", |
454 | min); | |
f23571e8 TH |
455 | break; |
456 | } | |
457 | if (min == max && min_type == max_type) | |
458 | break; | |
459 | tomoyo_addprintf(buffer, sizeof(buffer), "-"); | |
460 | min_type = max_type; | |
461 | min = max; | |
462 | } | |
463 | tomoyo_io_printf(head, "%s", buffer); | |
464 | } | |
9590837b KT |
465 | } |
466 | ||
2066a361 TH |
467 | /** |
468 | * tomoyo_print_number_union - Print a tomoyo_number_union. | |
469 | * | |
470 | * @head: Pointer to "struct tomoyo_io_buffer". | |
471 | * @ptr: Pointer to "struct tomoyo_number_union". | |
472 | * | |
473 | * Returns nothing. | |
474 | */ | |
475 | static void tomoyo_print_number_union(struct tomoyo_io_buffer *head, | |
476 | const struct tomoyo_number_union *ptr) | |
477 | { | |
478 | tomoyo_set_space(head); | |
479 | tomoyo_print_number_union_nospace(head, ptr); | |
480 | } | |
481 | ||
9590837b | 482 | /** |
e2bf6907 | 483 | * tomoyo_assign_profile - Create a new profile. |
9590837b | 484 | * |
bd03a3e4 | 485 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
9590837b KT |
486 | * @profile: Profile number to create. |
487 | * | |
488 | * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise. | |
489 | */ | |
bd03a3e4 TH |
490 | static struct tomoyo_profile *tomoyo_assign_profile |
491 | (struct tomoyo_policy_namespace *ns, const unsigned int profile) | |
9590837b | 492 | { |
57c2590f TH |
493 | struct tomoyo_profile *ptr; |
494 | struct tomoyo_profile *entry; | |
cdcf6723 | 495 | |
9590837b KT |
496 | if (profile >= TOMOYO_MAX_PROFILES) |
497 | return NULL; | |
bd03a3e4 | 498 | ptr = ns->profile_ptr[profile]; |
9590837b | 499 | if (ptr) |
57c2590f TH |
500 | return ptr; |
501 | entry = kzalloc(sizeof(*entry), GFP_NOFS); | |
502 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) | |
503 | goto out; | |
bd03a3e4 | 504 | ptr = ns->profile_ptr[profile]; |
57c2590f TH |
505 | if (!ptr && tomoyo_memory_ok(entry)) { |
506 | ptr = entry; | |
eadd99cc TH |
507 | ptr->default_config = TOMOYO_CONFIG_DISABLED | |
508 | TOMOYO_CONFIG_WANT_GRANT_LOG | | |
509 | TOMOYO_CONFIG_WANT_REJECT_LOG; | |
57c2590f TH |
510 | memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT, |
511 | sizeof(ptr->config)); | |
6afcb3b7 TH |
512 | ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] = |
513 | CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG; | |
514 | ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] = | |
515 | CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY; | |
57c2590f | 516 | mb(); /* Avoid out-of-order execution. */ |
bd03a3e4 | 517 | ns->profile_ptr[profile] = ptr; |
57c2590f | 518 | entry = NULL; |
cd7bec6a | 519 | } |
29282381 | 520 | mutex_unlock(&tomoyo_policy_lock); |
57c2590f TH |
521 | out: |
522 | kfree(entry); | |
9590837b KT |
523 | return ptr; |
524 | } | |
525 | ||
526 | /** | |
57c2590f TH |
527 | * tomoyo_profile - Find a profile. |
528 | * | |
bd03a3e4 | 529 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
57c2590f TH |
530 | * @profile: Profile number to find. |
531 | * | |
532 | * Returns pointer to "struct tomoyo_profile". | |
533 | */ | |
bd03a3e4 TH |
534 | struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns, |
535 | const u8 profile) | |
57c2590f | 536 | { |
d5ca1725 | 537 | static struct tomoyo_profile tomoyo_null_profile; |
bd03a3e4 | 538 | struct tomoyo_profile *ptr = ns->profile_ptr[profile]; |
cdcf6723 | 539 | |
d5ca1725 TH |
540 | if (!ptr) |
541 | ptr = &tomoyo_null_profile; | |
57c2590f TH |
542 | return ptr; |
543 | } | |
544 | ||
d5ca1725 TH |
545 | /** |
546 | * tomoyo_find_yesno - Find values for specified keyword. | |
547 | * | |
548 | * @string: String to check. | |
549 | * @find: Name of keyword. | |
550 | * | |
551 | * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise. | |
552 | */ | |
8e568687 TH |
553 | static s8 tomoyo_find_yesno(const char *string, const char *find) |
554 | { | |
555 | const char *cp = strstr(string, find); | |
cdcf6723 | 556 | |
8e568687 TH |
557 | if (cp) { |
558 | cp += strlen(find); | |
559 | if (!strncmp(cp, "=yes", 4)) | |
560 | return 1; | |
561 | else if (!strncmp(cp, "=no", 3)) | |
562 | return 0; | |
563 | } | |
564 | return -1; | |
565 | } | |
566 | ||
d5ca1725 TH |
567 | /** |
568 | * tomoyo_set_uint - Set value for specified preference. | |
569 | * | |
570 | * @i: Pointer to "unsigned int". | |
571 | * @string: String to check. | |
572 | * @find: Name of keyword. | |
573 | * | |
574 | * Returns nothing. | |
575 | */ | |
8e568687 TH |
576 | static void tomoyo_set_uint(unsigned int *i, const char *string, |
577 | const char *find) | |
578 | { | |
579 | const char *cp = strstr(string, find); | |
cdcf6723 | 580 | |
8e568687 TH |
581 | if (cp) |
582 | sscanf(cp + strlen(find), "=%u", i); | |
583 | } | |
584 | ||
d5ca1725 TH |
585 | /** |
586 | * tomoyo_set_mode - Set mode for specified profile. | |
587 | * | |
588 | * @name: Name of functionality. | |
589 | * @value: Mode for @name. | |
590 | * @profile: Pointer to "struct tomoyo_profile". | |
591 | * | |
592 | * Returns 0 on success, negative value otherwise. | |
593 | */ | |
8e568687 | 594 | static int tomoyo_set_mode(char *name, const char *value, |
8e568687 TH |
595 | struct tomoyo_profile *profile) |
596 | { | |
597 | u8 i; | |
598 | u8 config; | |
cdcf6723 | 599 | |
8e568687 TH |
600 | if (!strcmp(name, "CONFIG")) { |
601 | i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX; | |
602 | config = profile->default_config; | |
603 | } else if (tomoyo_str_starts(&name, "CONFIG::")) { | |
604 | config = 0; | |
605 | for (i = 0; i < TOMOYO_MAX_MAC_INDEX | |
606 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) { | |
2c47ab93 | 607 | int len = 0; |
cdcf6723 | 608 | |
2c47ab93 TH |
609 | if (i < TOMOYO_MAX_MAC_INDEX) { |
610 | const u8 c = tomoyo_index2category[i]; | |
611 | const char *category = | |
612 | tomoyo_category_keywords[c]; | |
cdcf6723 | 613 | |
2c47ab93 TH |
614 | len = strlen(category); |
615 | if (strncmp(name, category, len) || | |
616 | name[len++] != ':' || name[len++] != ':') | |
617 | continue; | |
618 | } | |
619 | if (strcmp(name + len, tomoyo_mac_keywords[i])) | |
8e568687 TH |
620 | continue; |
621 | config = profile->config[i]; | |
622 | break; | |
623 | } | |
624 | if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) | |
625 | return -EINVAL; | |
626 | } else { | |
627 | return -EINVAL; | |
628 | } | |
d5ca1725 | 629 | if (strstr(value, "use_default")) { |
8e568687 TH |
630 | config = TOMOYO_CONFIG_USE_DEFAULT; |
631 | } else { | |
632 | u8 mode; | |
cdcf6723 | 633 | |
8e568687 TH |
634 | for (mode = 0; mode < 4; mode++) |
635 | if (strstr(value, tomoyo_mode[mode])) | |
636 | /* | |
637 | * Update lower 3 bits in order to distinguish | |
638 | * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'. | |
639 | */ | |
640 | config = (config & ~7) | mode; | |
eadd99cc TH |
641 | if (config != TOMOYO_CONFIG_USE_DEFAULT) { |
642 | switch (tomoyo_find_yesno(value, "grant_log")) { | |
643 | case 1: | |
644 | config |= TOMOYO_CONFIG_WANT_GRANT_LOG; | |
645 | break; | |
646 | case 0: | |
647 | config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG; | |
648 | break; | |
649 | } | |
650 | switch (tomoyo_find_yesno(value, "reject_log")) { | |
651 | case 1: | |
652 | config |= TOMOYO_CONFIG_WANT_REJECT_LOG; | |
653 | break; | |
654 | case 0: | |
655 | config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG; | |
656 | break; | |
657 | } | |
658 | } | |
8e568687 TH |
659 | } |
660 | if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) | |
661 | profile->config[i] = config; | |
662 | else if (config != TOMOYO_CONFIG_USE_DEFAULT) | |
663 | profile->default_config = config; | |
664 | return 0; | |
665 | } | |
666 | ||
57c2590f TH |
667 | /** |
668 | * tomoyo_write_profile - Write profile table. | |
9590837b KT |
669 | * |
670 | * @head: Pointer to "struct tomoyo_io_buffer". | |
671 | * | |
672 | * Returns 0 on success, negative value otherwise. | |
673 | */ | |
674 | static int tomoyo_write_profile(struct tomoyo_io_buffer *head) | |
675 | { | |
676 | char *data = head->write_buf; | |
677 | unsigned int i; | |
9590837b KT |
678 | char *cp; |
679 | struct tomoyo_profile *profile; | |
cdcf6723 | 680 | |
bd03a3e4 TH |
681 | if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version) |
682 | == 1) | |
57c2590f TH |
683 | return 0; |
684 | i = simple_strtoul(data, &cp, 10); | |
d5ca1725 TH |
685 | if (*cp != '-') |
686 | return -EINVAL; | |
687 | data = cp + 1; | |
bd03a3e4 | 688 | profile = tomoyo_assign_profile(head->w.ns, i); |
d5ca1725 TH |
689 | if (!profile) |
690 | return -EINVAL; | |
9590837b KT |
691 | cp = strchr(data, '='); |
692 | if (!cp) | |
693 | return -EINVAL; | |
57c2590f | 694 | *cp++ = '\0'; |
9590837b | 695 | if (!strcmp(data, "COMMENT")) { |
2a086e5d TH |
696 | static DEFINE_SPINLOCK(lock); |
697 | const struct tomoyo_path_info *new_comment | |
698 | = tomoyo_get_name(cp); | |
699 | const struct tomoyo_path_info *old_comment; | |
cdcf6723 | 700 | |
2a086e5d TH |
701 | if (!new_comment) |
702 | return -ENOMEM; | |
703 | spin_lock(&lock); | |
704 | old_comment = profile->comment; | |
705 | profile->comment = new_comment; | |
706 | spin_unlock(&lock); | |
bf24fb01 | 707 | tomoyo_put_name(old_comment); |
9590837b KT |
708 | return 0; |
709 | } | |
d5ca1725 TH |
710 | if (!strcmp(data, "PREFERENCE")) { |
711 | for (i = 0; i < TOMOYO_MAX_PREF; i++) | |
712 | tomoyo_set_uint(&profile->pref[i], cp, | |
713 | tomoyo_pref_keywords[i]); | |
714 | return 0; | |
f23571e8 | 715 | } |
d5ca1725 | 716 | return tomoyo_set_mode(data, cp, profile); |
f23571e8 TH |
717 | } |
718 | ||
eadd99cc TH |
719 | /** |
720 | * tomoyo_print_config - Print mode for specified functionality. | |
721 | * | |
722 | * @head: Pointer to "struct tomoyo_io_buffer". | |
723 | * @config: Mode for that functionality. | |
724 | * | |
725 | * Returns nothing. | |
726 | * | |
727 | * Caller prints functionality's name. | |
728 | */ | |
f23571e8 TH |
729 | static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config) |
730 | { | |
eadd99cc TH |
731 | tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n", |
732 | tomoyo_mode[config & 3], | |
733 | tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG), | |
734 | tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG)); | |
f23571e8 TH |
735 | } |
736 | ||
9590837b | 737 | /** |
57c2590f | 738 | * tomoyo_read_profile - Read profile table. |
9590837b KT |
739 | * |
740 | * @head: Pointer to "struct tomoyo_io_buffer". | |
eadd99cc TH |
741 | * |
742 | * Returns nothing. | |
9590837b | 743 | */ |
8fbe71f0 | 744 | static void tomoyo_read_profile(struct tomoyo_io_buffer *head) |
9590837b | 745 | { |
f23571e8 | 746 | u8 index; |
bd03a3e4 TH |
747 | struct tomoyo_policy_namespace *ns = |
748 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
f23571e8 | 749 | const struct tomoyo_profile *profile; |
cdcf6723 | 750 | |
bd03a3e4 TH |
751 | if (head->r.eof) |
752 | return; | |
f23571e8 TH |
753 | next: |
754 | index = head->r.index; | |
bd03a3e4 | 755 | profile = ns->profile_ptr[index]; |
f23571e8 TH |
756 | switch (head->r.step) { |
757 | case 0: | |
bd03a3e4 TH |
758 | tomoyo_print_namespace(head); |
759 | tomoyo_io_printf(head, "PROFILE_VERSION=%u\n", | |
760 | ns->profile_version); | |
f23571e8 TH |
761 | head->r.step++; |
762 | break; | |
763 | case 1: | |
764 | for ( ; head->r.index < TOMOYO_MAX_PROFILES; | |
765 | head->r.index++) | |
bd03a3e4 | 766 | if (ns->profile_ptr[head->r.index]) |
f23571e8 | 767 | break; |
4d818971 TH |
768 | if (head->r.index == TOMOYO_MAX_PROFILES) { |
769 | head->r.eof = true; | |
f23571e8 | 770 | return; |
4d818971 | 771 | } |
f23571e8 TH |
772 | head->r.step++; |
773 | break; | |
774 | case 2: | |
775 | { | |
d5ca1725 | 776 | u8 i; |
f23571e8 TH |
777 | const struct tomoyo_path_info *comment = |
778 | profile->comment; | |
cdcf6723 | 779 | |
bd03a3e4 | 780 | tomoyo_print_namespace(head); |
f23571e8 TH |
781 | tomoyo_io_printf(head, "%u-COMMENT=", index); |
782 | tomoyo_set_string(head, comment ? comment->name : ""); | |
783 | tomoyo_set_lf(head); | |
4d818971 | 784 | tomoyo_print_namespace(head); |
d5ca1725 TH |
785 | tomoyo_io_printf(head, "%u-PREFERENCE={ ", index); |
786 | for (i = 0; i < TOMOYO_MAX_PREF; i++) | |
787 | tomoyo_io_printf(head, "%s=%u ", | |
788 | tomoyo_pref_keywords[i], | |
789 | profile->pref[i]); | |
790 | tomoyo_set_string(head, "}\n"); | |
f23571e8 TH |
791 | head->r.step++; |
792 | } | |
793 | break; | |
794 | case 3: | |
795 | { | |
bd03a3e4 | 796 | tomoyo_print_namespace(head); |
f23571e8 TH |
797 | tomoyo_io_printf(head, "%u-%s", index, "CONFIG"); |
798 | tomoyo_print_config(head, profile->default_config); | |
799 | head->r.bit = 0; | |
800 | head->r.step++; | |
801 | } | |
802 | break; | |
803 | case 4: | |
804 | for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX | |
805 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) { | |
806 | const u8 i = head->r.bit; | |
807 | const u8 config = profile->config[i]; | |
cdcf6723 | 808 | |
57c2590f TH |
809 | if (config == TOMOYO_CONFIG_USE_DEFAULT) |
810 | continue; | |
bd03a3e4 | 811 | tomoyo_print_namespace(head); |
2c47ab93 TH |
812 | if (i < TOMOYO_MAX_MAC_INDEX) |
813 | tomoyo_io_printf(head, "%u-CONFIG::%s::%s", | |
814 | index, | |
815 | tomoyo_category_keywords | |
816 | [tomoyo_index2category[i]], | |
817 | tomoyo_mac_keywords[i]); | |
818 | else | |
819 | tomoyo_io_printf(head, "%u-CONFIG::%s", index, | |
820 | tomoyo_mac_keywords[i]); | |
f23571e8 TH |
821 | tomoyo_print_config(head, config); |
822 | head->r.bit++; | |
823 | break; | |
824 | } | |
825 | if (head->r.bit == TOMOYO_MAX_MAC_INDEX | |
826 | + TOMOYO_MAX_MAC_CATEGORY_INDEX) { | |
f23571e8 TH |
827 | head->r.index++; |
828 | head->r.step = 1; | |
9590837b | 829 | } |
57c2590f | 830 | break; |
9590837b | 831 | } |
f23571e8 TH |
832 | if (tomoyo_flush(head)) |
833 | goto next; | |
9590837b KT |
834 | } |
835 | ||
0f2a55d5 TH |
836 | /** |
837 | * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry. | |
838 | * | |
839 | * @a: Pointer to "struct tomoyo_acl_head". | |
840 | * @b: Pointer to "struct tomoyo_acl_head". | |
841 | * | |
842 | * Returns true if @a == @b, false otherwise. | |
843 | */ | |
e2bf6907 TH |
844 | static bool tomoyo_same_manager(const struct tomoyo_acl_head *a, |
845 | const struct tomoyo_acl_head *b) | |
36f5e1ff | 846 | { |
e2bf6907 TH |
847 | return container_of(a, struct tomoyo_manager, head)->manager == |
848 | container_of(b, struct tomoyo_manager, head)->manager; | |
36f5e1ff TH |
849 | } |
850 | ||
9590837b KT |
851 | /** |
852 | * tomoyo_update_manager_entry - Add a manager entry. | |
853 | * | |
854 | * @manager: The path to manager or the domainnamme. | |
855 | * @is_delete: True if it is a delete request. | |
856 | * | |
857 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
858 | * |
859 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
860 | */ |
861 | static int tomoyo_update_manager_entry(const char *manager, | |
862 | const bool is_delete) | |
863 | { | |
e2bf6907 | 864 | struct tomoyo_manager e = { }; |
a238cf5b | 865 | struct tomoyo_acl_param param = { |
bd03a3e4 | 866 | /* .ns = &tomoyo_kernel_namespace, */ |
a238cf5b | 867 | .is_delete = is_delete, |
cdcf6723 | 868 | .list = &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER], |
a238cf5b TH |
869 | }; |
870 | int error = is_delete ? -ENOENT : -ENOMEM; | |
cdcf6723 | 871 | |
77b513dd TH |
872 | if (!tomoyo_correct_domain(manager) && |
873 | !tomoyo_correct_word(manager)) | |
874 | return -EINVAL; | |
9e4b50e9 | 875 | e.manager = tomoyo_get_name(manager); |
a238cf5b TH |
876 | if (e.manager) { |
877 | error = tomoyo_update_policy(&e.head, sizeof(e), ¶m, | |
878 | tomoyo_same_manager); | |
879 | tomoyo_put_name(e.manager); | |
880 | } | |
9590837b KT |
881 | return error; |
882 | } | |
883 | ||
884 | /** | |
e2bf6907 | 885 | * tomoyo_write_manager - Write manager policy. |
9590837b KT |
886 | * |
887 | * @head: Pointer to "struct tomoyo_io_buffer". | |
888 | * | |
889 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
890 | * |
891 | * Caller holds tomoyo_read_lock(). | |
9590837b | 892 | */ |
e2bf6907 | 893 | static int tomoyo_write_manager(struct tomoyo_io_buffer *head) |
9590837b KT |
894 | { |
895 | char *data = head->write_buf; | |
9590837b KT |
896 | |
897 | if (!strcmp(data, "manage_by_non_root")) { | |
bd03a3e4 | 898 | tomoyo_manage_by_non_root = !head->w.is_delete; |
9590837b KT |
899 | return 0; |
900 | } | |
bd03a3e4 | 901 | return tomoyo_update_manager_entry(data, head->w.is_delete); |
9590837b KT |
902 | } |
903 | ||
904 | /** | |
e2bf6907 | 905 | * tomoyo_read_manager - Read manager policy. |
9590837b KT |
906 | * |
907 | * @head: Pointer to "struct tomoyo_io_buffer". | |
908 | * | |
fdb8ebb7 | 909 | * Caller holds tomoyo_read_lock(). |
9590837b | 910 | */ |
e2bf6907 | 911 | static void tomoyo_read_manager(struct tomoyo_io_buffer *head) |
9590837b | 912 | { |
f23571e8 | 913 | if (head->r.eof) |
8fbe71f0 | 914 | return; |
cdcf6723 | 915 | list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER]) { |
e2bf6907 | 916 | struct tomoyo_manager *ptr = |
f23571e8 | 917 | list_entry(head->r.acl, typeof(*ptr), head.list); |
cdcf6723 | 918 | |
82e0f001 | 919 | if (ptr->head.is_deleted) |
9590837b | 920 | continue; |
f23571e8 TH |
921 | if (!tomoyo_flush(head)) |
922 | return; | |
923 | tomoyo_set_string(head, ptr->manager->name); | |
924 | tomoyo_set_lf(head); | |
9590837b | 925 | } |
f23571e8 | 926 | head->r.eof = true; |
9590837b KT |
927 | } |
928 | ||
929 | /** | |
e2bf6907 | 930 | * tomoyo_manager - Check whether the current process is a policy manager. |
9590837b KT |
931 | * |
932 | * Returns true if the current process is permitted to modify policy | |
933 | * via /sys/kernel/security/tomoyo/ interface. | |
fdb8ebb7 TH |
934 | * |
935 | * Caller holds tomoyo_read_lock(). | |
9590837b | 936 | */ |
e2bf6907 | 937 | static bool tomoyo_manager(void) |
9590837b | 938 | { |
e2bf6907 | 939 | struct tomoyo_manager *ptr; |
9590837b KT |
940 | const char *exe; |
941 | const struct task_struct *task = current; | |
942 | const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname; | |
e80b1859 | 943 | bool found = IS_ENABLED(CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING); |
9590837b KT |
944 | |
945 | if (!tomoyo_policy_loaded) | |
946 | return true; | |
609fcd1b EB |
947 | if (!tomoyo_manage_by_non_root && |
948 | (!uid_eq(task->cred->uid, GLOBAL_ROOT_UID) || | |
949 | !uid_eq(task->cred->euid, GLOBAL_ROOT_UID))) | |
9590837b | 950 | return false; |
9590837b KT |
951 | exe = tomoyo_get_exe(); |
952 | if (!exe) | |
953 | return false; | |
cdcf6723 | 954 | list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER], head.list) { |
77b513dd TH |
955 | if (!ptr->head.is_deleted && |
956 | (!tomoyo_pathcmp(domainname, ptr->manager) || | |
957 | !strcmp(exe, ptr->manager->name))) { | |
9590837b KT |
958 | found = true; |
959 | break; | |
960 | } | |
961 | } | |
9590837b KT |
962 | if (!found) { /* Reduce error messages. */ |
963 | static pid_t last_pid; | |
964 | const pid_t pid = current->pid; | |
cdcf6723 | 965 | |
9590837b | 966 | if (last_pid != pid) { |
cdcf6723 TH |
967 | pr_warn("%s ( %s ) is not permitted to update policies.\n", |
968 | domainname->name, exe); | |
9590837b KT |
969 | last_pid = pid; |
970 | } | |
971 | } | |
8e2d39a1 | 972 | kfree(exe); |
9590837b KT |
973 | return found; |
974 | } | |
975 | ||
59df3166 TH |
976 | static struct tomoyo_domain_info *tomoyo_find_domain_by_qid |
977 | (unsigned int serial); | |
978 | ||
9590837b | 979 | /** |
bd03a3e4 | 980 | * tomoyo_select_domain - Parse select command. |
9590837b KT |
981 | * |
982 | * @head: Pointer to "struct tomoyo_io_buffer". | |
983 | * @data: String to parse. | |
984 | * | |
985 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
986 | * |
987 | * Caller holds tomoyo_read_lock(). | |
9590837b | 988 | */ |
bd03a3e4 TH |
989 | static bool tomoyo_select_domain(struct tomoyo_io_buffer *head, |
990 | const char *data) | |
9590837b KT |
991 | { |
992 | unsigned int pid; | |
993 | struct tomoyo_domain_info *domain = NULL; | |
9b244373 | 994 | bool global_pid = false; |
cdcf6723 | 995 | |
bd03a3e4 TH |
996 | if (strncmp(data, "select ", 7)) |
997 | return false; | |
998 | data += 7; | |
9b244373 TH |
999 | if (sscanf(data, "pid=%u", &pid) == 1 || |
1000 | (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) { | |
9590837b | 1001 | struct task_struct *p; |
cdcf6723 | 1002 | |
1fcdc7c5 | 1003 | rcu_read_lock(); |
9b244373 TH |
1004 | if (global_pid) |
1005 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
1006 | else | |
1007 | p = find_task_by_vpid(pid); | |
9590837b | 1008 | if (p) |
8c6cb983 | 1009 | domain = tomoyo_task(p)->domain_info; |
1fcdc7c5 | 1010 | rcu_read_unlock(); |
9590837b | 1011 | } else if (!strncmp(data, "domain=", 7)) { |
75093152 | 1012 | if (tomoyo_domain_def(data + 7)) |
9590837b | 1013 | domain = tomoyo_find_domain(data + 7); |
59df3166 TH |
1014 | } else if (sscanf(data, "Q=%u", &pid) == 1) { |
1015 | domain = tomoyo_find_domain_by_qid(pid); | |
9590837b KT |
1016 | } else |
1017 | return false; | |
0df7e8b8 | 1018 | head->w.domain = domain; |
9590837b KT |
1019 | /* Accessing read_buf is safe because head->io_sem is held. */ |
1020 | if (!head->read_buf) | |
1021 | return true; /* Do nothing if open(O_WRONLY). */ | |
f23571e8 TH |
1022 | memset(&head->r, 0, sizeof(head->r)); |
1023 | head->r.print_this_domain_only = true; | |
68eda8f5 DC |
1024 | if (domain) |
1025 | head->r.domain = &domain->list; | |
1026 | else | |
1027 | head->r.eof = 1; | |
9590837b | 1028 | tomoyo_io_printf(head, "# select %s\n", data); |
475e6fa3 TH |
1029 | if (domain && domain->is_deleted) |
1030 | tomoyo_io_printf(head, "# This is a deleted domain.\n"); | |
9590837b KT |
1031 | return true; |
1032 | } | |
1033 | ||
731d37aa TH |
1034 | /** |
1035 | * tomoyo_same_task_acl - Check for duplicated "struct tomoyo_task_acl" entry. | |
1036 | * | |
1037 | * @a: Pointer to "struct tomoyo_acl_info". | |
1038 | * @b: Pointer to "struct tomoyo_acl_info". | |
1039 | * | |
1040 | * Returns true if @a == @b, false otherwise. | |
1041 | */ | |
1042 | static bool tomoyo_same_task_acl(const struct tomoyo_acl_info *a, | |
cdcf6723 | 1043 | const struct tomoyo_acl_info *b) |
731d37aa TH |
1044 | { |
1045 | const struct tomoyo_task_acl *p1 = container_of(a, typeof(*p1), head); | |
1046 | const struct tomoyo_task_acl *p2 = container_of(b, typeof(*p2), head); | |
cdcf6723 | 1047 | |
731d37aa TH |
1048 | return p1->domainname == p2->domainname; |
1049 | } | |
1050 | ||
1051 | /** | |
1052 | * tomoyo_write_task - Update task related list. | |
1053 | * | |
1054 | * @param: Pointer to "struct tomoyo_acl_param". | |
1055 | * | |
1056 | * Returns 0 on success, negative value otherwise. | |
1057 | * | |
1058 | * Caller holds tomoyo_read_lock(). | |
1059 | */ | |
1060 | static int tomoyo_write_task(struct tomoyo_acl_param *param) | |
1061 | { | |
1062 | int error = -EINVAL; | |
cdcf6723 | 1063 | |
731d37aa TH |
1064 | if (tomoyo_str_starts(¶m->data, "manual_domain_transition ")) { |
1065 | struct tomoyo_task_acl e = { | |
1066 | .head.type = TOMOYO_TYPE_MANUAL_TASK_ACL, | |
1067 | .domainname = tomoyo_get_domainname(param), | |
1068 | }; | |
cdcf6723 | 1069 | |
731d37aa TH |
1070 | if (e.domainname) |
1071 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
1072 | tomoyo_same_task_acl, | |
1073 | NULL); | |
1074 | tomoyo_put_name(e.domainname); | |
1075 | } | |
1076 | return error; | |
1077 | } | |
1078 | ||
ccf135f5 TH |
1079 | /** |
1080 | * tomoyo_delete_domain - Delete a domain. | |
1081 | * | |
1082 | * @domainname: The name of domain. | |
1083 | * | |
7d7473db | 1084 | * Returns 0 on success, negative value otherwise. |
fdb8ebb7 TH |
1085 | * |
1086 | * Caller holds tomoyo_read_lock(). | |
ccf135f5 TH |
1087 | */ |
1088 | static int tomoyo_delete_domain(char *domainname) | |
1089 | { | |
1090 | struct tomoyo_domain_info *domain; | |
1091 | struct tomoyo_path_info name; | |
1092 | ||
1093 | name.name = domainname; | |
1094 | tomoyo_fill_path_info(&name); | |
29282381 | 1095 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
7d7473db | 1096 | return -EINTR; |
ccf135f5 | 1097 | /* Is there an active domain? */ |
fdb8ebb7 | 1098 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
ccf135f5 TH |
1099 | /* Never delete tomoyo_kernel_domain */ |
1100 | if (domain == &tomoyo_kernel_domain) | |
1101 | continue; | |
1102 | if (domain->is_deleted || | |
1103 | tomoyo_pathcmp(domain->domainname, &name)) | |
1104 | continue; | |
1105 | domain->is_deleted = true; | |
1106 | break; | |
1107 | } | |
f737d95d | 1108 | mutex_unlock(&tomoyo_policy_lock); |
ccf135f5 TH |
1109 | return 0; |
1110 | } | |
1111 | ||
17fcfbd9 | 1112 | /** |
e2bf6907 | 1113 | * tomoyo_write_domain2 - Write domain policy. |
17fcfbd9 | 1114 | * |
bd03a3e4 | 1115 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
a238cf5b TH |
1116 | * @list: Pointer to "struct list_head". |
1117 | * @data: Policy to be interpreted. | |
1118 | * @is_delete: True if it is a delete request. | |
17fcfbd9 TH |
1119 | * |
1120 | * Returns 0 on success, negative value otherwise. | |
1121 | * | |
1122 | * Caller holds tomoyo_read_lock(). | |
1123 | */ | |
bd03a3e4 TH |
1124 | static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns, |
1125 | struct list_head *list, char *data, | |
e2bf6907 | 1126 | const bool is_delete) |
17fcfbd9 | 1127 | { |
a238cf5b | 1128 | struct tomoyo_acl_param param = { |
bd03a3e4 | 1129 | .ns = ns, |
a238cf5b TH |
1130 | .list = list, |
1131 | .data = data, | |
1132 | .is_delete = is_delete, | |
1133 | }; | |
1134 | static const struct { | |
1135 | const char *keyword; | |
cdcf6723 | 1136 | int (*write)(struct tomoyo_acl_param *param); |
731d37aa | 1137 | } tomoyo_callback[5] = { |
a238cf5b | 1138 | { "file ", tomoyo_write_file }, |
059d84db TH |
1139 | { "network inet ", tomoyo_write_inet_network }, |
1140 | { "network unix ", tomoyo_write_unix_network }, | |
d58e0da8 | 1141 | { "misc ", tomoyo_write_misc }, |
731d37aa | 1142 | { "task ", tomoyo_write_task }, |
a238cf5b TH |
1143 | }; |
1144 | u8 i; | |
d58e0da8 TH |
1145 | |
1146 | for (i = 0; i < ARRAY_SIZE(tomoyo_callback); i++) { | |
a238cf5b TH |
1147 | if (!tomoyo_str_starts(¶m.data, |
1148 | tomoyo_callback[i].keyword)) | |
1149 | continue; | |
1150 | return tomoyo_callback[i].write(¶m); | |
1151 | } | |
1152 | return -EINVAL; | |
17fcfbd9 TH |
1153 | } |
1154 | ||
2c47ab93 TH |
1155 | /* String table for domain flags. */ |
1156 | const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = { | |
1157 | [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n", | |
1158 | [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n", | |
1159 | }; | |
1160 | ||
9590837b | 1161 | /** |
e2bf6907 | 1162 | * tomoyo_write_domain - Write domain policy. |
9590837b KT |
1163 | * |
1164 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1165 | * | |
1166 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1167 | * |
1168 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1169 | */ |
e2bf6907 | 1170 | static int tomoyo_write_domain(struct tomoyo_io_buffer *head) |
9590837b KT |
1171 | { |
1172 | char *data = head->write_buf; | |
bd03a3e4 | 1173 | struct tomoyo_policy_namespace *ns; |
0df7e8b8 | 1174 | struct tomoyo_domain_info *domain = head->w.domain; |
bd03a3e4 TH |
1175 | const bool is_delete = head->w.is_delete; |
1176 | bool is_select = !is_delete && tomoyo_str_starts(&data, "select "); | |
4b425641 | 1177 | unsigned int idx; |
cdcf6723 | 1178 | |
bd03a3e4 | 1179 | if (*data == '<') { |
7d7473db | 1180 | int ret = 0; |
cdcf6723 | 1181 | |
9590837b KT |
1182 | domain = NULL; |
1183 | if (is_delete) | |
7d7473db | 1184 | ret = tomoyo_delete_domain(data); |
fdb8ebb7 | 1185 | else if (is_select) |
9590837b | 1186 | domain = tomoyo_find_domain(data); |
fdb8ebb7 | 1187 | else |
bd03a3e4 | 1188 | domain = tomoyo_assign_domain(data, false); |
0df7e8b8 | 1189 | head->w.domain = domain; |
7d7473db | 1190 | return ret; |
9590837b KT |
1191 | } |
1192 | if (!domain) | |
1193 | return -EINVAL; | |
bd03a3e4 | 1194 | ns = domain->ns; |
4b425641 TH |
1195 | if (sscanf(data, "use_profile %u", &idx) == 1 |
1196 | && idx < TOMOYO_MAX_PROFILES) { | |
1197 | if (!tomoyo_policy_loaded || ns->profile_ptr[idx]) | |
1198 | if (!is_delete) | |
1199 | domain->profile = (u8) idx; | |
9590837b KT |
1200 | return 0; |
1201 | } | |
4b425641 TH |
1202 | if (sscanf(data, "use_group %u\n", &idx) == 1 |
1203 | && idx < TOMOYO_MAX_ACL_GROUPS) { | |
32997144 | 1204 | if (!is_delete) |
4b425641 TH |
1205 | set_bit(idx, domain->group); |
1206 | else | |
1207 | clear_bit(idx, domain->group); | |
32997144 TH |
1208 | return 0; |
1209 | } | |
4b425641 TH |
1210 | for (idx = 0; idx < TOMOYO_MAX_DOMAIN_INFO_FLAGS; idx++) { |
1211 | const char *cp = tomoyo_dif[idx]; | |
cdcf6723 | 1212 | |
2c47ab93 TH |
1213 | if (strncmp(data, cp, strlen(cp) - 1)) |
1214 | continue; | |
4b425641 | 1215 | domain->flags[idx] = !is_delete; |
9b244373 TH |
1216 | return 0; |
1217 | } | |
bd03a3e4 TH |
1218 | return tomoyo_write_domain2(ns, &domain->acl_info_list, data, |
1219 | is_delete); | |
9590837b KT |
1220 | } |
1221 | ||
2066a361 TH |
1222 | /** |
1223 | * tomoyo_print_condition - Print condition part. | |
1224 | * | |
1225 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1226 | * @cond: Pointer to "struct tomoyo_condition". | |
1227 | * | |
1228 | * Returns true on success, false otherwise. | |
1229 | */ | |
1230 | static bool tomoyo_print_condition(struct tomoyo_io_buffer *head, | |
1231 | const struct tomoyo_condition *cond) | |
1232 | { | |
1233 | switch (head->r.cond_step) { | |
1234 | case 0: | |
1235 | head->r.cond_index = 0; | |
1236 | head->r.cond_step++; | |
6bce98ed TH |
1237 | if (cond->transit) { |
1238 | tomoyo_set_space(head); | |
1239 | tomoyo_set_string(head, cond->transit->name); | |
1240 | } | |
2066a361 TH |
1241 | /* fall through */ |
1242 | case 1: | |
1243 | { | |
1244 | const u16 condc = cond->condc; | |
1245 | const struct tomoyo_condition_element *condp = | |
1246 | (typeof(condp)) (cond + 1); | |
1247 | const struct tomoyo_number_union *numbers_p = | |
1248 | (typeof(numbers_p)) (condp + condc); | |
2ca9bf45 TH |
1249 | const struct tomoyo_name_union *names_p = |
1250 | (typeof(names_p)) | |
1251 | (numbers_p + cond->numbers_count); | |
5b636857 TH |
1252 | const struct tomoyo_argv *argv = |
1253 | (typeof(argv)) (names_p + cond->names_count); | |
1254 | const struct tomoyo_envp *envp = | |
1255 | (typeof(envp)) (argv + cond->argc); | |
2066a361 | 1256 | u16 skip; |
cdcf6723 | 1257 | |
2066a361 TH |
1258 | for (skip = 0; skip < head->r.cond_index; skip++) { |
1259 | const u8 left = condp->left; | |
1260 | const u8 right = condp->right; | |
cdcf6723 | 1261 | |
2066a361 TH |
1262 | condp++; |
1263 | switch (left) { | |
5b636857 TH |
1264 | case TOMOYO_ARGV_ENTRY: |
1265 | argv++; | |
1266 | continue; | |
1267 | case TOMOYO_ENVP_ENTRY: | |
1268 | envp++; | |
1269 | continue; | |
2066a361 TH |
1270 | case TOMOYO_NUMBER_UNION: |
1271 | numbers_p++; | |
1272 | break; | |
1273 | } | |
1274 | switch (right) { | |
2ca9bf45 TH |
1275 | case TOMOYO_NAME_UNION: |
1276 | names_p++; | |
1277 | break; | |
2066a361 TH |
1278 | case TOMOYO_NUMBER_UNION: |
1279 | numbers_p++; | |
1280 | break; | |
1281 | } | |
1282 | } | |
1283 | while (head->r.cond_index < condc) { | |
1284 | const u8 match = condp->equals; | |
1285 | const u8 left = condp->left; | |
1286 | const u8 right = condp->right; | |
cdcf6723 | 1287 | |
2066a361 TH |
1288 | if (!tomoyo_flush(head)) |
1289 | return false; | |
1290 | condp++; | |
1291 | head->r.cond_index++; | |
1292 | tomoyo_set_space(head); | |
1293 | switch (left) { | |
5b636857 TH |
1294 | case TOMOYO_ARGV_ENTRY: |
1295 | tomoyo_io_printf(head, | |
1296 | "exec.argv[%lu]%s=\"", | |
cdcf6723 | 1297 | argv->index, argv->is_not ? "!" : ""); |
5b636857 TH |
1298 | tomoyo_set_string(head, |
1299 | argv->value->name); | |
1300 | tomoyo_set_string(head, "\""); | |
1301 | argv++; | |
1302 | continue; | |
1303 | case TOMOYO_ENVP_ENTRY: | |
1304 | tomoyo_set_string(head, | |
1305 | "exec.envp[\""); | |
1306 | tomoyo_set_string(head, | |
1307 | envp->name->name); | |
cdcf6723 | 1308 | tomoyo_io_printf(head, "\"]%s=", envp->is_not ? "!" : ""); |
5b636857 TH |
1309 | if (envp->value) { |
1310 | tomoyo_set_string(head, "\""); | |
cdcf6723 | 1311 | tomoyo_set_string(head, envp->value->name); |
5b636857 TH |
1312 | tomoyo_set_string(head, "\""); |
1313 | } else { | |
1314 | tomoyo_set_string(head, | |
1315 | "NULL"); | |
1316 | } | |
1317 | envp++; | |
1318 | continue; | |
2066a361 TH |
1319 | case TOMOYO_NUMBER_UNION: |
1320 | tomoyo_print_number_union_nospace | |
1321 | (head, numbers_p++); | |
1322 | break; | |
1323 | default: | |
1324 | tomoyo_set_string(head, | |
1325 | tomoyo_condition_keyword[left]); | |
1326 | break; | |
1327 | } | |
1328 | tomoyo_set_string(head, match ? "=" : "!="); | |
1329 | switch (right) { | |
2ca9bf45 TH |
1330 | case TOMOYO_NAME_UNION: |
1331 | tomoyo_print_name_union_quoted | |
1332 | (head, names_p++); | |
1333 | break; | |
2066a361 TH |
1334 | case TOMOYO_NUMBER_UNION: |
1335 | tomoyo_print_number_union_nospace | |
1336 | (head, numbers_p++); | |
1337 | break; | |
1338 | default: | |
1339 | tomoyo_set_string(head, | |
1340 | tomoyo_condition_keyword[right]); | |
1341 | break; | |
1342 | } | |
1343 | } | |
1344 | } | |
1345 | head->r.cond_step++; | |
1346 | /* fall through */ | |
1347 | case 2: | |
1348 | if (!tomoyo_flush(head)) | |
1349 | break; | |
1350 | head->r.cond_step++; | |
1351 | /* fall through */ | |
1352 | case 3: | |
1f067a68 TH |
1353 | if (cond->grant_log != TOMOYO_GRANTLOG_AUTO) |
1354 | tomoyo_io_printf(head, " grant_log=%s", | |
1355 | tomoyo_yesno(cond->grant_log == | |
1356 | TOMOYO_GRANTLOG_YES)); | |
2066a361 TH |
1357 | tomoyo_set_lf(head); |
1358 | return true; | |
1359 | } | |
1360 | return false; | |
1361 | } | |
1362 | ||
9590837b | 1363 | /** |
32997144 | 1364 | * tomoyo_set_group - Print "acl_group " header keyword and category name. |
9590837b | 1365 | * |
0d2171d7 TH |
1366 | * @head: Pointer to "struct tomoyo_io_buffer". |
1367 | * @category: Category name. | |
9590837b | 1368 | * |
0d2171d7 | 1369 | * Returns nothing. |
9590837b | 1370 | */ |
0d2171d7 TH |
1371 | static void tomoyo_set_group(struct tomoyo_io_buffer *head, |
1372 | const char *category) | |
9590837b | 1373 | { |
bd03a3e4 TH |
1374 | if (head->type == TOMOYO_EXCEPTIONPOLICY) { |
1375 | tomoyo_print_namespace(head); | |
32997144 TH |
1376 | tomoyo_io_printf(head, "acl_group %u ", |
1377 | head->r.acl_group_index); | |
bd03a3e4 | 1378 | } |
0d2171d7 | 1379 | tomoyo_set_string(head, category); |
9590837b KT |
1380 | } |
1381 | ||
1382 | /** | |
5db5a39b | 1383 | * tomoyo_print_entry - Print an ACL entry. |
9590837b KT |
1384 | * |
1385 | * @head: Pointer to "struct tomoyo_io_buffer". | |
5db5a39b | 1386 | * @acl: Pointer to an ACL entry. |
9590837b KT |
1387 | * |
1388 | * Returns true on success, false otherwise. | |
1389 | */ | |
5db5a39b TH |
1390 | static bool tomoyo_print_entry(struct tomoyo_io_buffer *head, |
1391 | struct tomoyo_acl_info *acl) | |
9590837b | 1392 | { |
5db5a39b | 1393 | const u8 acl_type = acl->type; |
0d2171d7 | 1394 | bool first = true; |
f23571e8 | 1395 | u8 bit; |
9590837b | 1396 | |
2066a361 TH |
1397 | if (head->r.print_cond_part) |
1398 | goto print_cond_part; | |
5db5a39b TH |
1399 | if (acl->is_deleted) |
1400 | return true; | |
f23571e8 TH |
1401 | if (!tomoyo_flush(head)) |
1402 | return false; | |
1403 | else if (acl_type == TOMOYO_TYPE_PATH_ACL) { | |
5db5a39b TH |
1404 | struct tomoyo_path_acl *ptr = |
1405 | container_of(acl, typeof(*ptr), head); | |
1406 | const u16 perm = ptr->perm; | |
cdcf6723 | 1407 | |
0d2171d7 | 1408 | for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) { |
5db5a39b TH |
1409 | if (!(perm & (1 << bit))) |
1410 | continue; | |
bd03a3e4 | 1411 | if (head->r.print_transition_related_only && |
5db5a39b TH |
1412 | bit != TOMOYO_TYPE_EXECUTE) |
1413 | continue; | |
0d2171d7 TH |
1414 | if (first) { |
1415 | tomoyo_set_group(head, "file "); | |
1416 | first = false; | |
1417 | } else { | |
1418 | tomoyo_set_slash(head); | |
1419 | } | |
1420 | tomoyo_set_string(head, tomoyo_path_keyword[bit]); | |
5db5a39b | 1421 | } |
0d2171d7 TH |
1422 | if (first) |
1423 | return true; | |
f23571e8 | 1424 | tomoyo_print_name_union(head, &ptr->name); |
731d37aa TH |
1425 | } else if (acl_type == TOMOYO_TYPE_MANUAL_TASK_ACL) { |
1426 | struct tomoyo_task_acl *ptr = | |
1427 | container_of(acl, typeof(*ptr), head); | |
cdcf6723 | 1428 | |
731d37aa TH |
1429 | tomoyo_set_group(head, "task "); |
1430 | tomoyo_set_string(head, "manual_domain_transition "); | |
1431 | tomoyo_set_string(head, ptr->domainname->name); | |
bd03a3e4 | 1432 | } else if (head->r.print_transition_related_only) { |
5db5a39b TH |
1433 | return true; |
1434 | } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) { | |
1435 | struct tomoyo_path2_acl *ptr = | |
1436 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 | 1437 | const u8 perm = ptr->perm; |
cdcf6723 | 1438 | |
0d2171d7 TH |
1439 | for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) { |
1440 | if (!(perm & (1 << bit))) | |
1441 | continue; | |
1442 | if (first) { | |
1443 | tomoyo_set_group(head, "file "); | |
1444 | first = false; | |
1445 | } else { | |
1446 | tomoyo_set_slash(head); | |
1447 | } | |
1448 | tomoyo_set_string(head, tomoyo_mac_keywords | |
1449 | [tomoyo_pp2mac[bit]]); | |
1450 | } | |
1451 | if (first) | |
1452 | return true; | |
f23571e8 TH |
1453 | tomoyo_print_name_union(head, &ptr->name1); |
1454 | tomoyo_print_name_union(head, &ptr->name2); | |
5db5a39b TH |
1455 | } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) { |
1456 | struct tomoyo_path_number_acl *ptr = | |
1457 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 | 1458 | const u8 perm = ptr->perm; |
cdcf6723 | 1459 | |
0d2171d7 TH |
1460 | for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) { |
1461 | if (!(perm & (1 << bit))) | |
1462 | continue; | |
1463 | if (first) { | |
1464 | tomoyo_set_group(head, "file "); | |
1465 | first = false; | |
1466 | } else { | |
1467 | tomoyo_set_slash(head); | |
1468 | } | |
1469 | tomoyo_set_string(head, tomoyo_mac_keywords | |
1470 | [tomoyo_pn2mac[bit]]); | |
1471 | } | |
1472 | if (first) | |
1473 | return true; | |
f23571e8 TH |
1474 | tomoyo_print_name_union(head, &ptr->name); |
1475 | tomoyo_print_number_union(head, &ptr->number); | |
5db5a39b TH |
1476 | } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) { |
1477 | struct tomoyo_mkdev_acl *ptr = | |
1478 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 | 1479 | const u8 perm = ptr->perm; |
cdcf6723 | 1480 | |
0d2171d7 TH |
1481 | for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) { |
1482 | if (!(perm & (1 << bit))) | |
1483 | continue; | |
1484 | if (first) { | |
1485 | tomoyo_set_group(head, "file "); | |
1486 | first = false; | |
1487 | } else { | |
1488 | tomoyo_set_slash(head); | |
1489 | } | |
1490 | tomoyo_set_string(head, tomoyo_mac_keywords | |
1491 | [tomoyo_pnnn2mac[bit]]); | |
1492 | } | |
1493 | if (first) | |
1494 | return true; | |
f23571e8 TH |
1495 | tomoyo_print_name_union(head, &ptr->name); |
1496 | tomoyo_print_number_union(head, &ptr->mode); | |
1497 | tomoyo_print_number_union(head, &ptr->major); | |
1498 | tomoyo_print_number_union(head, &ptr->minor); | |
059d84db TH |
1499 | } else if (acl_type == TOMOYO_TYPE_INET_ACL) { |
1500 | struct tomoyo_inet_acl *ptr = | |
1501 | container_of(acl, typeof(*ptr), head); | |
1502 | const u8 perm = ptr->perm; | |
1503 | ||
1504 | for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) { | |
1505 | if (!(perm & (1 << bit))) | |
1506 | continue; | |
1507 | if (first) { | |
1508 | tomoyo_set_group(head, "network inet "); | |
1509 | tomoyo_set_string(head, tomoyo_proto_keyword | |
1510 | [ptr->protocol]); | |
1511 | tomoyo_set_space(head); | |
1512 | first = false; | |
1513 | } else { | |
1514 | tomoyo_set_slash(head); | |
1515 | } | |
1516 | tomoyo_set_string(head, tomoyo_socket_keyword[bit]); | |
1517 | } | |
1518 | if (first) | |
1519 | return true; | |
1520 | tomoyo_set_space(head); | |
1521 | if (ptr->address.group) { | |
1522 | tomoyo_set_string(head, "@"); | |
1523 | tomoyo_set_string(head, ptr->address.group->group_name | |
1524 | ->name); | |
1525 | } else { | |
1526 | char buf[128]; | |
cdcf6723 | 1527 | |
059d84db TH |
1528 | tomoyo_print_ip(buf, sizeof(buf), &ptr->address); |
1529 | tomoyo_io_printf(head, "%s", buf); | |
1530 | } | |
1531 | tomoyo_print_number_union(head, &ptr->port); | |
1532 | } else if (acl_type == TOMOYO_TYPE_UNIX_ACL) { | |
1533 | struct tomoyo_unix_acl *ptr = | |
1534 | container_of(acl, typeof(*ptr), head); | |
1535 | const u8 perm = ptr->perm; | |
1536 | ||
1537 | for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) { | |
1538 | if (!(perm & (1 << bit))) | |
1539 | continue; | |
1540 | if (first) { | |
1541 | tomoyo_set_group(head, "network unix "); | |
1542 | tomoyo_set_string(head, tomoyo_proto_keyword | |
1543 | [ptr->protocol]); | |
1544 | tomoyo_set_space(head); | |
1545 | first = false; | |
1546 | } else { | |
1547 | tomoyo_set_slash(head); | |
1548 | } | |
1549 | tomoyo_set_string(head, tomoyo_socket_keyword[bit]); | |
1550 | } | |
1551 | if (first) | |
1552 | return true; | |
1553 | tomoyo_print_name_union(head, &ptr->name); | |
5db5a39b TH |
1554 | } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) { |
1555 | struct tomoyo_mount_acl *ptr = | |
1556 | container_of(acl, typeof(*ptr), head); | |
cdcf6723 | 1557 | |
0d2171d7 | 1558 | tomoyo_set_group(head, "file mount"); |
f23571e8 TH |
1559 | tomoyo_print_name_union(head, &ptr->dev_name); |
1560 | tomoyo_print_name_union(head, &ptr->dir_name); | |
1561 | tomoyo_print_name_union(head, &ptr->fs_type); | |
1562 | tomoyo_print_number_union(head, &ptr->flags); | |
d58e0da8 TH |
1563 | } else if (acl_type == TOMOYO_TYPE_ENV_ACL) { |
1564 | struct tomoyo_env_acl *ptr = | |
1565 | container_of(acl, typeof(*ptr), head); | |
1566 | ||
1567 | tomoyo_set_group(head, "misc env "); | |
1568 | tomoyo_set_string(head, ptr->env->name); | |
a1f9bb6a | 1569 | } |
2066a361 TH |
1570 | if (acl->cond) { |
1571 | head->r.print_cond_part = true; | |
1572 | head->r.cond_step = 0; | |
1573 | if (!tomoyo_flush(head)) | |
1574 | return false; | |
1575 | print_cond_part: | |
1576 | if (!tomoyo_print_condition(head, acl->cond)) | |
1577 | return false; | |
1578 | head->r.print_cond_part = false; | |
1579 | } else { | |
1580 | tomoyo_set_lf(head); | |
1581 | } | |
f23571e8 TH |
1582 | return true; |
1583 | } | |
1584 | ||
1585 | /** | |
1586 | * tomoyo_read_domain2 - Read domain policy. | |
1587 | * | |
32997144 TH |
1588 | * @head: Pointer to "struct tomoyo_io_buffer". |
1589 | * @list: Pointer to "struct list_head". | |
f23571e8 TH |
1590 | * |
1591 | * Caller holds tomoyo_read_lock(). | |
1592 | * | |
1593 | * Returns true on success, false otherwise. | |
1594 | */ | |
1595 | static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head, | |
32997144 | 1596 | struct list_head *list) |
f23571e8 | 1597 | { |
32997144 | 1598 | list_for_each_cookie(head->r.acl, list) { |
f23571e8 TH |
1599 | struct tomoyo_acl_info *ptr = |
1600 | list_entry(head->r.acl, typeof(*ptr), list); | |
cdcf6723 | 1601 | |
f23571e8 TH |
1602 | if (!tomoyo_print_entry(head, ptr)) |
1603 | return false; | |
1604 | } | |
1605 | head->r.acl = NULL; | |
a1f9bb6a | 1606 | return true; |
a1f9bb6a TH |
1607 | } |
1608 | ||
9590837b | 1609 | /** |
e2bf6907 | 1610 | * tomoyo_read_domain - Read domain policy. |
9590837b KT |
1611 | * |
1612 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1613 | * | |
fdb8ebb7 | 1614 | * Caller holds tomoyo_read_lock(). |
9590837b | 1615 | */ |
e2bf6907 | 1616 | static void tomoyo_read_domain(struct tomoyo_io_buffer *head) |
9590837b | 1617 | { |
f23571e8 | 1618 | if (head->r.eof) |
8fbe71f0 | 1619 | return; |
f23571e8 | 1620 | list_for_each_cookie(head->r.domain, &tomoyo_domain_list) { |
475e6fa3 | 1621 | struct tomoyo_domain_info *domain = |
f23571e8 | 1622 | list_entry(head->r.domain, typeof(*domain), list); |
cdcf6723 TH |
1623 | u8 i; |
1624 | ||
f23571e8 TH |
1625 | switch (head->r.step) { |
1626 | case 0: | |
1627 | if (domain->is_deleted && | |
1628 | !head->r.print_this_domain_only) | |
1629 | continue; | |
1630 | /* Print domainname and flags. */ | |
1631 | tomoyo_set_string(head, domain->domainname->name); | |
1632 | tomoyo_set_lf(head); | |
b5bc60b4 | 1633 | tomoyo_io_printf(head, "use_profile %u\n", |
f23571e8 | 1634 | domain->profile); |
2c47ab93 TH |
1635 | for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++) |
1636 | if (domain->flags[i]) | |
1637 | tomoyo_set_string(head, tomoyo_dif[i]); | |
4b425641 | 1638 | head->r.index = 0; |
f23571e8 | 1639 | head->r.step++; |
f23571e8 TH |
1640 | /* fall through */ |
1641 | case 1: | |
4b425641 TH |
1642 | while (head->r.index < TOMOYO_MAX_ACL_GROUPS) { |
1643 | i = head->r.index++; | |
1644 | if (!test_bit(i, domain->group)) | |
1645 | continue; | |
1646 | tomoyo_io_printf(head, "use_group %u\n", i); | |
1647 | if (!tomoyo_flush(head)) | |
1648 | return; | |
1649 | } | |
1650 | head->r.index = 0; | |
1651 | head->r.step++; | |
1652 | tomoyo_set_lf(head); | |
1653 | /* fall through */ | |
1654 | case 2: | |
32997144 | 1655 | if (!tomoyo_read_domain2(head, &domain->acl_info_list)) |
f23571e8 TH |
1656 | return; |
1657 | head->r.step++; | |
1658 | if (!tomoyo_set_lf(head)) | |
1659 | return; | |
1660 | /* fall through */ | |
4b425641 | 1661 | case 3: |
f23571e8 TH |
1662 | head->r.step = 0; |
1663 | if (head->r.print_this_domain_only) | |
1664 | goto done; | |
9590837b | 1665 | } |
9590837b | 1666 | } |
f23571e8 TH |
1667 | done: |
1668 | head->r.eof = true; | |
9590837b KT |
1669 | } |
1670 | ||
9590837b KT |
1671 | /** |
1672 | * tomoyo_write_pid: Specify PID to obtain domainname. | |
1673 | * | |
1674 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1675 | * | |
1676 | * Returns 0. | |
1677 | */ | |
1678 | static int tomoyo_write_pid(struct tomoyo_io_buffer *head) | |
1679 | { | |
f23571e8 | 1680 | head->r.eof = false; |
9590837b KT |
1681 | return 0; |
1682 | } | |
1683 | ||
1684 | /** | |
1685 | * tomoyo_read_pid - Get domainname of the specified PID. | |
1686 | * | |
1687 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1688 | * | |
1689 | * Returns the domainname which the specified PID is in on success, | |
1690 | * empty string otherwise. | |
1691 | * The PID is specified by tomoyo_write_pid() so that the user can obtain | |
1692 | * using read()/write() interface rather than sysctl() interface. | |
1693 | */ | |
8fbe71f0 | 1694 | static void tomoyo_read_pid(struct tomoyo_io_buffer *head) |
9590837b | 1695 | { |
f23571e8 TH |
1696 | char *buf = head->write_buf; |
1697 | bool global_pid = false; | |
1698 | unsigned int pid; | |
1699 | struct task_struct *p; | |
1700 | struct tomoyo_domain_info *domain = NULL; | |
1701 | ||
1702 | /* Accessing write_buf is safe because head->io_sem is held. */ | |
1703 | if (!buf) { | |
1704 | head->r.eof = true; | |
1705 | return; /* Do nothing if open(O_RDONLY). */ | |
9590837b | 1706 | } |
f23571e8 TH |
1707 | if (head->r.w_pos || head->r.eof) |
1708 | return; | |
1709 | head->r.eof = true; | |
1710 | if (tomoyo_str_starts(&buf, "global-pid ")) | |
1711 | global_pid = true; | |
dbdb75bd DX |
1712 | if (kstrtouint(buf, 10, &pid)) |
1713 | return; | |
f23571e8 | 1714 | rcu_read_lock(); |
f23571e8 TH |
1715 | if (global_pid) |
1716 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
1717 | else | |
1718 | p = find_task_by_vpid(pid); | |
1719 | if (p) | |
8c6cb983 | 1720 | domain = tomoyo_task(p)->domain_info; |
f23571e8 TH |
1721 | rcu_read_unlock(); |
1722 | if (!domain) | |
1723 | return; | |
1724 | tomoyo_io_printf(head, "%u %u ", pid, domain->profile); | |
1725 | tomoyo_set_string(head, domain->domainname->name); | |
9590837b KT |
1726 | } |
1727 | ||
0f2a55d5 | 1728 | /* String table for domain transition control keywords. */ |
5448ec4f | 1729 | static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = { |
bd03a3e4 TH |
1730 | [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ", |
1731 | [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ", | |
1732 | [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ", | |
1733 | [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ", | |
1734 | [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ", | |
1735 | [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ", | |
5448ec4f TH |
1736 | }; |
1737 | ||
0f2a55d5 | 1738 | /* String table for grouping keywords. */ |
e2bf6907 | 1739 | static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = { |
059d84db TH |
1740 | [TOMOYO_PATH_GROUP] = "path_group ", |
1741 | [TOMOYO_NUMBER_GROUP] = "number_group ", | |
1742 | [TOMOYO_ADDRESS_GROUP] = "address_group ", | |
e2bf6907 TH |
1743 | }; |
1744 | ||
9590837b | 1745 | /** |
e2bf6907 | 1746 | * tomoyo_write_exception - Write exception policy. |
9590837b KT |
1747 | * |
1748 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1749 | * | |
1750 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1751 | * |
1752 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1753 | */ |
e2bf6907 | 1754 | static int tomoyo_write_exception(struct tomoyo_io_buffer *head) |
9590837b | 1755 | { |
bd03a3e4 | 1756 | const bool is_delete = head->w.is_delete; |
a238cf5b | 1757 | struct tomoyo_acl_param param = { |
bd03a3e4 TH |
1758 | .ns = head->w.ns, |
1759 | .is_delete = is_delete, | |
a238cf5b | 1760 | .data = head->write_buf, |
e2bf6907 | 1761 | }; |
a238cf5b | 1762 | u8 i; |
cdcf6723 | 1763 | |
a238cf5b TH |
1764 | if (tomoyo_str_starts(¶m.data, "aggregator ")) |
1765 | return tomoyo_write_aggregator(¶m); | |
e2bf6907 | 1766 | for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++) |
a238cf5b TH |
1767 | if (tomoyo_str_starts(¶m.data, tomoyo_transition_type[i])) |
1768 | return tomoyo_write_transition_control(¶m, i); | |
e2bf6907 | 1769 | for (i = 0; i < TOMOYO_MAX_GROUP; i++) |
a238cf5b TH |
1770 | if (tomoyo_str_starts(¶m.data, tomoyo_group_name[i])) |
1771 | return tomoyo_write_group(¶m, i); | |
32997144 TH |
1772 | if (tomoyo_str_starts(¶m.data, "acl_group ")) { |
1773 | unsigned int group; | |
1774 | char *data; | |
cdcf6723 | 1775 | |
32997144 TH |
1776 | group = simple_strtoul(param.data, &data, 10); |
1777 | if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ') | |
bd03a3e4 TH |
1778 | return tomoyo_write_domain2 |
1779 | (head->w.ns, &head->w.ns->acl_group[group], | |
1780 | data, is_delete); | |
32997144 | 1781 | } |
9590837b KT |
1782 | return -EINVAL; |
1783 | } | |
1784 | ||
1785 | /** | |
059d84db | 1786 | * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list. |
9590837b KT |
1787 | * |
1788 | * @head: Pointer to "struct tomoyo_io_buffer". | |
31845e8c TH |
1789 | * @idx: Index number. |
1790 | * | |
1791 | * Returns true on success, false otherwise. | |
9590837b | 1792 | * |
fdb8ebb7 | 1793 | * Caller holds tomoyo_read_lock(). |
9590837b | 1794 | */ |
31845e8c | 1795 | static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx) |
9590837b | 1796 | { |
bd03a3e4 TH |
1797 | struct tomoyo_policy_namespace *ns = |
1798 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
1799 | struct list_head *list = &ns->group_list[idx]; | |
cdcf6723 | 1800 | |
bd03a3e4 | 1801 | list_for_each_cookie(head->r.group, list) { |
31845e8c | 1802 | struct tomoyo_group *group = |
0df7e8b8 | 1803 | list_entry(head->r.group, typeof(*group), head.list); |
cdcf6723 | 1804 | |
f23571e8 | 1805 | list_for_each_cookie(head->r.acl, &group->member_list) { |
31845e8c | 1806 | struct tomoyo_acl_head *ptr = |
f23571e8 | 1807 | list_entry(head->r.acl, typeof(*ptr), list); |
cdcf6723 | 1808 | |
31845e8c TH |
1809 | if (ptr->is_deleted) |
1810 | continue; | |
f23571e8 TH |
1811 | if (!tomoyo_flush(head)) |
1812 | return false; | |
bd03a3e4 | 1813 | tomoyo_print_namespace(head); |
f23571e8 TH |
1814 | tomoyo_set_string(head, tomoyo_group_name[idx]); |
1815 | tomoyo_set_string(head, group->group_name->name); | |
31845e8c | 1816 | if (idx == TOMOYO_PATH_GROUP) { |
f23571e8 TH |
1817 | tomoyo_set_space(head); |
1818 | tomoyo_set_string(head, container_of | |
1819 | (ptr, struct tomoyo_path_group, | |
1820 | head)->member_name->name); | |
31845e8c | 1821 | } else if (idx == TOMOYO_NUMBER_GROUP) { |
f23571e8 TH |
1822 | tomoyo_print_number_union(head, &container_of |
1823 | (ptr, | |
1824 | struct tomoyo_number_group, | |
1825 | head)->number); | |
059d84db TH |
1826 | } else if (idx == TOMOYO_ADDRESS_GROUP) { |
1827 | char buffer[128]; | |
059d84db TH |
1828 | struct tomoyo_address_group *member = |
1829 | container_of(ptr, typeof(*member), | |
1830 | head); | |
cdcf6723 | 1831 | |
059d84db TH |
1832 | tomoyo_print_ip(buffer, sizeof(buffer), |
1833 | &member->address); | |
1834 | tomoyo_io_printf(head, " %s", buffer); | |
31845e8c | 1835 | } |
f23571e8 | 1836 | tomoyo_set_lf(head); |
31845e8c | 1837 | } |
f23571e8 | 1838 | head->r.acl = NULL; |
31845e8c | 1839 | } |
f23571e8 | 1840 | head->r.group = NULL; |
31845e8c TH |
1841 | return true; |
1842 | } | |
1843 | ||
1844 | /** | |
1845 | * tomoyo_read_policy - Read "struct tomoyo_..._entry" list. | |
1846 | * | |
1847 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1848 | * @idx: Index number. | |
1849 | * | |
1850 | * Returns true on success, false otherwise. | |
1851 | * | |
1852 | * Caller holds tomoyo_read_lock(). | |
1853 | */ | |
1854 | static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx) | |
1855 | { | |
bd03a3e4 TH |
1856 | struct tomoyo_policy_namespace *ns = |
1857 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
1858 | struct list_head *list = &ns->policy_list[idx]; | |
cdcf6723 | 1859 | |
bd03a3e4 | 1860 | list_for_each_cookie(head->r.acl, list) { |
475e6fa3 | 1861 | struct tomoyo_acl_head *acl = |
f23571e8 | 1862 | container_of(head->r.acl, typeof(*acl), list); |
31845e8c TH |
1863 | if (acl->is_deleted) |
1864 | continue; | |
f23571e8 TH |
1865 | if (!tomoyo_flush(head)) |
1866 | return false; | |
31845e8c | 1867 | switch (idx) { |
5448ec4f | 1868 | case TOMOYO_ID_TRANSITION_CONTROL: |
31845e8c | 1869 | { |
5448ec4f | 1870 | struct tomoyo_transition_control *ptr = |
31845e8c | 1871 | container_of(acl, typeof(*ptr), head); |
cdcf6723 | 1872 | |
bd03a3e4 | 1873 | tomoyo_print_namespace(head); |
0d2171d7 | 1874 | tomoyo_set_string(head, tomoyo_transition_type |
f23571e8 | 1875 | [ptr->type]); |
0d2171d7 TH |
1876 | tomoyo_set_string(head, ptr->program ? |
1877 | ptr->program->name : "any"); | |
1878 | tomoyo_set_string(head, " from "); | |
1879 | tomoyo_set_string(head, ptr->domainname ? | |
1880 | ptr->domainname->name : | |
1881 | "any"); | |
31845e8c TH |
1882 | } |
1883 | break; | |
31845e8c TH |
1884 | case TOMOYO_ID_AGGREGATOR: |
1885 | { | |
e2bf6907 | 1886 | struct tomoyo_aggregator *ptr = |
31845e8c | 1887 | container_of(acl, typeof(*ptr), head); |
cdcf6723 | 1888 | |
bd03a3e4 | 1889 | tomoyo_print_namespace(head); |
b5bc60b4 | 1890 | tomoyo_set_string(head, "aggregator "); |
f23571e8 TH |
1891 | tomoyo_set_string(head, |
1892 | ptr->original_name->name); | |
1893 | tomoyo_set_space(head); | |
1894 | tomoyo_set_string(head, | |
1895 | ptr->aggregated_name->name); | |
31845e8c TH |
1896 | } |
1897 | break; | |
31845e8c TH |
1898 | default: |
1899 | continue; | |
9590837b | 1900 | } |
f23571e8 | 1901 | tomoyo_set_lf(head); |
9590837b | 1902 | } |
f23571e8 | 1903 | head->r.acl = NULL; |
31845e8c TH |
1904 | return true; |
1905 | } | |
1906 | ||
1907 | /** | |
e2bf6907 | 1908 | * tomoyo_read_exception - Read exception policy. |
31845e8c TH |
1909 | * |
1910 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1911 | * | |
1912 | * Caller holds tomoyo_read_lock(). | |
1913 | */ | |
e2bf6907 | 1914 | static void tomoyo_read_exception(struct tomoyo_io_buffer *head) |
31845e8c | 1915 | { |
bd03a3e4 TH |
1916 | struct tomoyo_policy_namespace *ns = |
1917 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
cdcf6723 | 1918 | |
f23571e8 | 1919 | if (head->r.eof) |
31845e8c | 1920 | return; |
f23571e8 TH |
1921 | while (head->r.step < TOMOYO_MAX_POLICY && |
1922 | tomoyo_read_policy(head, head->r.step)) | |
1923 | head->r.step++; | |
1924 | if (head->r.step < TOMOYO_MAX_POLICY) | |
31845e8c | 1925 | return; |
f23571e8 TH |
1926 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP && |
1927 | tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY)) | |
1928 | head->r.step++; | |
1929 | if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP) | |
31845e8c | 1930 | return; |
32997144 TH |
1931 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP |
1932 | + TOMOYO_MAX_ACL_GROUPS) { | |
1933 | head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY | |
1934 | - TOMOYO_MAX_GROUP; | |
bd03a3e4 | 1935 | if (!tomoyo_read_domain2(head, &ns->acl_group |
32997144 TH |
1936 | [head->r.acl_group_index])) |
1937 | return; | |
1938 | head->r.step++; | |
1939 | } | |
f23571e8 | 1940 | head->r.eof = true; |
9590837b KT |
1941 | } |
1942 | ||
eadd99cc | 1943 | /* Wait queue for kernel -> userspace notification. */ |
17fcfbd9 | 1944 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait); |
eadd99cc TH |
1945 | /* Wait queue for userspace -> kernel notification. */ |
1946 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait); | |
17fcfbd9 TH |
1947 | |
1948 | /* Structure for query. */ | |
e2bf6907 | 1949 | struct tomoyo_query { |
17fcfbd9 | 1950 | struct list_head list; |
59df3166 | 1951 | struct tomoyo_domain_info *domain; |
17fcfbd9 | 1952 | char *query; |
eadd99cc | 1953 | size_t query_len; |
17fcfbd9 | 1954 | unsigned int serial; |
eadd99cc TH |
1955 | u8 timer; |
1956 | u8 answer; | |
1957 | u8 retry; | |
17fcfbd9 TH |
1958 | }; |
1959 | ||
e2bf6907 | 1960 | /* The list for "struct tomoyo_query". */ |
17fcfbd9 TH |
1961 | static LIST_HEAD(tomoyo_query_list); |
1962 | ||
eadd99cc TH |
1963 | /* Lock for manipulating tomoyo_query_list. */ |
1964 | static DEFINE_SPINLOCK(tomoyo_query_list_lock); | |
1965 | ||
17fcfbd9 TH |
1966 | /* |
1967 | * Number of "struct file" referring /sys/kernel/security/tomoyo/query | |
1968 | * interface. | |
1969 | */ | |
1970 | static atomic_t tomoyo_query_observers = ATOMIC_INIT(0); | |
1971 | ||
2ca9bf45 TH |
1972 | /** |
1973 | * tomoyo_truncate - Truncate a line. | |
1974 | * | |
1975 | * @str: String to truncate. | |
1976 | * | |
1977 | * Returns length of truncated @str. | |
1978 | */ | |
1979 | static int tomoyo_truncate(char *str) | |
1980 | { | |
1981 | char *start = str; | |
cdcf6723 | 1982 | |
2ca9bf45 TH |
1983 | while (*(unsigned char *) str > (unsigned char) ' ') |
1984 | str++; | |
1985 | *str = '\0'; | |
1986 | return strlen(start) + 1; | |
1987 | } | |
1988 | ||
eadd99cc TH |
1989 | /** |
1990 | * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode. | |
1991 | * | |
1992 | * @domain: Pointer to "struct tomoyo_domain_info". | |
1993 | * @header: Lines containing ACL. | |
1994 | * | |
1995 | * Returns nothing. | |
1996 | */ | |
1997 | static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header) | |
1998 | { | |
1999 | char *buffer; | |
2ca9bf45 | 2000 | char *realpath = NULL; |
5b636857 | 2001 | char *argv0 = NULL; |
2ca9bf45 | 2002 | char *symlink = NULL; |
eadd99cc TH |
2003 | char *cp = strchr(header, '\n'); |
2004 | int len; | |
cdcf6723 | 2005 | |
eadd99cc TH |
2006 | if (!cp) |
2007 | return; | |
2008 | cp = strchr(cp + 1, '\n'); | |
2009 | if (!cp) | |
2010 | return; | |
2011 | *cp++ = '\0'; | |
2012 | len = strlen(cp) + 1; | |
2ca9bf45 TH |
2013 | /* strstr() will return NULL if ordering is wrong. */ |
2014 | if (*cp == 'f') { | |
5b636857 TH |
2015 | argv0 = strstr(header, " argv[]={ \""); |
2016 | if (argv0) { | |
2017 | argv0 += 10; | |
2018 | len += tomoyo_truncate(argv0) + 14; | |
2019 | } | |
2ca9bf45 TH |
2020 | realpath = strstr(header, " exec={ realpath=\""); |
2021 | if (realpath) { | |
2022 | realpath += 8; | |
2023 | len += tomoyo_truncate(realpath) + 6; | |
2024 | } | |
2025 | symlink = strstr(header, " symlink.target=\""); | |
2026 | if (symlink) | |
2027 | len += tomoyo_truncate(symlink + 1) + 1; | |
2028 | } | |
eadd99cc TH |
2029 | buffer = kmalloc(len, GFP_NOFS); |
2030 | if (!buffer) | |
2031 | return; | |
2032 | snprintf(buffer, len - 1, "%s", cp); | |
2ca9bf45 TH |
2033 | if (realpath) |
2034 | tomoyo_addprintf(buffer, len, " exec.%s", realpath); | |
5b636857 TH |
2035 | if (argv0) |
2036 | tomoyo_addprintf(buffer, len, " exec.argv[0]=%s", argv0); | |
2ca9bf45 TH |
2037 | if (symlink) |
2038 | tomoyo_addprintf(buffer, len, "%s", symlink); | |
eadd99cc | 2039 | tomoyo_normalize_line(buffer); |
b22b8b9f TH |
2040 | if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer, |
2041 | false)) | |
2042 | tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES); | |
eadd99cc TH |
2043 | kfree(buffer); |
2044 | } | |
2045 | ||
17fcfbd9 TH |
2046 | /** |
2047 | * tomoyo_supervisor - Ask for the supervisor's decision. | |
2048 | * | |
eadd99cc TH |
2049 | * @r: Pointer to "struct tomoyo_request_info". |
2050 | * @fmt: The printf()'s format string, followed by parameters. | |
17fcfbd9 TH |
2051 | * |
2052 | * Returns 0 if the supervisor decided to permit the access request which | |
2053 | * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the | |
2054 | * supervisor decided to retry the access request which violated the policy in | |
2055 | * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise. | |
2056 | */ | |
2057 | int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...) | |
2058 | { | |
2059 | va_list args; | |
eadd99cc | 2060 | int error; |
17fcfbd9 TH |
2061 | int len; |
2062 | static unsigned int tomoyo_serial; | |
eadd99cc | 2063 | struct tomoyo_query entry = { }; |
17fcfbd9 | 2064 | bool quota_exceeded = false; |
cdcf6723 | 2065 | |
eadd99cc TH |
2066 | va_start(args, fmt); |
2067 | len = vsnprintf((char *) &len, 1, fmt, args) + 1; | |
2068 | va_end(args); | |
2069 | /* Write /sys/kernel/security/tomoyo/audit. */ | |
2070 | va_start(args, fmt); | |
2071 | tomoyo_write_log2(r, len, fmt, args); | |
2072 | va_end(args); | |
2073 | /* Nothing more to do if granted. */ | |
2074 | if (r->granted) | |
2075 | return 0; | |
b22b8b9f TH |
2076 | if (r->mode) |
2077 | tomoyo_update_stat(r->mode); | |
17fcfbd9 | 2078 | switch (r->mode) { |
eadd99cc TH |
2079 | case TOMOYO_CONFIG_ENFORCING: |
2080 | error = -EPERM; | |
2081 | if (atomic_read(&tomoyo_query_observers)) | |
2082 | break; | |
2083 | goto out; | |
17fcfbd9 | 2084 | case TOMOYO_CONFIG_LEARNING: |
eadd99cc TH |
2085 | error = 0; |
2086 | /* Check max_learning_entry parameter. */ | |
2087 | if (tomoyo_domain_quota_is_ok(r)) | |
2088 | break; | |
17fcfbd9 | 2089 | /* fall through */ |
eadd99cc | 2090 | default: |
17fcfbd9 TH |
2091 | return 0; |
2092 | } | |
eadd99cc | 2093 | /* Get message. */ |
17fcfbd9 | 2094 | va_start(args, fmt); |
eadd99cc | 2095 | entry.query = tomoyo_init_log(r, len, fmt, args); |
17fcfbd9 | 2096 | va_end(args); |
eadd99cc | 2097 | if (!entry.query) |
17fcfbd9 | 2098 | goto out; |
eadd99cc TH |
2099 | entry.query_len = strlen(entry.query) + 1; |
2100 | if (!error) { | |
2101 | tomoyo_add_entry(r->domain, entry.query); | |
17fcfbd9 | 2102 | goto out; |
eadd99cc TH |
2103 | } |
2104 | len = tomoyo_round2(entry.query_len); | |
59df3166 | 2105 | entry.domain = r->domain; |
17fcfbd9 | 2106 | spin_lock(&tomoyo_query_list_lock); |
eadd99cc TH |
2107 | if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] && |
2108 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len | |
2109 | >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) { | |
17fcfbd9 TH |
2110 | quota_exceeded = true; |
2111 | } else { | |
eadd99cc TH |
2112 | entry.serial = tomoyo_serial++; |
2113 | entry.retry = r->retry; | |
2114 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len; | |
2115 | list_add_tail(&entry.list, &tomoyo_query_list); | |
17fcfbd9 TH |
2116 | } |
2117 | spin_unlock(&tomoyo_query_list_lock); | |
2118 | if (quota_exceeded) | |
2119 | goto out; | |
17fcfbd9 | 2120 | /* Give 10 seconds for supervisor's opinion. */ |
eadd99cc TH |
2121 | while (entry.timer < 10) { |
2122 | wake_up_all(&tomoyo_query_wait); | |
2123 | if (wait_event_interruptible_timeout | |
2124 | (tomoyo_answer_wait, entry.answer || | |
2125 | !atomic_read(&tomoyo_query_observers), HZ)) | |
17fcfbd9 | 2126 | break; |
cdcf6723 | 2127 | entry.timer++; |
17fcfbd9 TH |
2128 | } |
2129 | spin_lock(&tomoyo_query_list_lock); | |
eadd99cc TH |
2130 | list_del(&entry.list); |
2131 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len; | |
17fcfbd9 | 2132 | spin_unlock(&tomoyo_query_list_lock); |
eadd99cc | 2133 | switch (entry.answer) { |
17fcfbd9 TH |
2134 | case 3: /* Asked to retry by administrator. */ |
2135 | error = TOMOYO_RETRY_REQUEST; | |
2136 | r->retry++; | |
2137 | break; | |
2138 | case 1: | |
2139 | /* Granted by administrator. */ | |
2140 | error = 0; | |
2141 | break; | |
17fcfbd9 | 2142 | default: |
eadd99cc | 2143 | /* Timed out or rejected by administrator. */ |
17fcfbd9 TH |
2144 | break; |
2145 | } | |
eadd99cc TH |
2146 | out: |
2147 | kfree(entry.query); | |
17fcfbd9 TH |
2148 | return error; |
2149 | } | |
2150 | ||
59df3166 TH |
2151 | /** |
2152 | * tomoyo_find_domain_by_qid - Get domain by query id. | |
2153 | * | |
2154 | * @serial: Query ID assigned by tomoyo_supervisor(). | |
2155 | * | |
2156 | * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise. | |
2157 | */ | |
2158 | static struct tomoyo_domain_info *tomoyo_find_domain_by_qid | |
2159 | (unsigned int serial) | |
2160 | { | |
2161 | struct tomoyo_query *ptr; | |
2162 | struct tomoyo_domain_info *domain = NULL; | |
cdcf6723 | 2163 | |
59df3166 TH |
2164 | spin_lock(&tomoyo_query_list_lock); |
2165 | list_for_each_entry(ptr, &tomoyo_query_list, list) { | |
6041e834 | 2166 | if (ptr->serial != serial) |
59df3166 TH |
2167 | continue; |
2168 | domain = ptr->domain; | |
2169 | break; | |
2170 | } | |
2171 | spin_unlock(&tomoyo_query_list_lock); | |
2172 | return domain; | |
2173 | } | |
2174 | ||
17fcfbd9 TH |
2175 | /** |
2176 | * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query. | |
2177 | * | |
2178 | * @file: Pointer to "struct file". | |
2179 | * @wait: Pointer to "poll_table". | |
2180 | * | |
a9a08845 | 2181 | * Returns EPOLLIN | EPOLLRDNORM when ready to read, 0 otherwise. |
17fcfbd9 TH |
2182 | * |
2183 | * Waits for access requests which violated policy in enforcing mode. | |
2184 | */ | |
c0d4be28 | 2185 | static __poll_t tomoyo_poll_query(struct file *file, poll_table *wait) |
17fcfbd9 | 2186 | { |
6041e834 | 2187 | if (!list_empty(&tomoyo_query_list)) |
a9a08845 | 2188 | return EPOLLIN | EPOLLRDNORM; |
6041e834 TH |
2189 | poll_wait(file, &tomoyo_query_wait, wait); |
2190 | if (!list_empty(&tomoyo_query_list)) | |
a9a08845 | 2191 | return EPOLLIN | EPOLLRDNORM; |
17fcfbd9 TH |
2192 | return 0; |
2193 | } | |
2194 | ||
2195 | /** | |
2196 | * tomoyo_read_query - Read access requests which violated policy in enforcing mode. | |
2197 | * | |
2198 | * @head: Pointer to "struct tomoyo_io_buffer". | |
17fcfbd9 | 2199 | */ |
8fbe71f0 | 2200 | static void tomoyo_read_query(struct tomoyo_io_buffer *head) |
17fcfbd9 TH |
2201 | { |
2202 | struct list_head *tmp; | |
2c47ab93 TH |
2203 | unsigned int pos = 0; |
2204 | size_t len = 0; | |
17fcfbd9 | 2205 | char *buf; |
cdcf6723 | 2206 | |
f23571e8 | 2207 | if (head->r.w_pos) |
8fbe71f0 | 2208 | return; |
cdcf6723 TH |
2209 | kfree(head->read_buf); |
2210 | head->read_buf = NULL; | |
17fcfbd9 TH |
2211 | spin_lock(&tomoyo_query_list_lock); |
2212 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 2213 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
cdcf6723 | 2214 | |
f23571e8 | 2215 | if (pos++ != head->r.query_index) |
17fcfbd9 TH |
2216 | continue; |
2217 | len = ptr->query_len; | |
2218 | break; | |
2219 | } | |
2220 | spin_unlock(&tomoyo_query_list_lock); | |
2221 | if (!len) { | |
f23571e8 | 2222 | head->r.query_index = 0; |
8fbe71f0 | 2223 | return; |
17fcfbd9 | 2224 | } |
eadd99cc | 2225 | buf = kzalloc(len + 32, GFP_NOFS); |
17fcfbd9 | 2226 | if (!buf) |
8fbe71f0 | 2227 | return; |
17fcfbd9 TH |
2228 | pos = 0; |
2229 | spin_lock(&tomoyo_query_list_lock); | |
2230 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 2231 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
cdcf6723 | 2232 | |
f23571e8 | 2233 | if (pos++ != head->r.query_index) |
17fcfbd9 TH |
2234 | continue; |
2235 | /* | |
2236 | * Some query can be skipped because tomoyo_query_list | |
2237 | * can change, but I don't care. | |
2238 | */ | |
2239 | if (len == ptr->query_len) | |
eadd99cc TH |
2240 | snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial, |
2241 | ptr->retry, ptr->query); | |
17fcfbd9 TH |
2242 | break; |
2243 | } | |
2244 | spin_unlock(&tomoyo_query_list_lock); | |
2245 | if (buf[0]) { | |
17fcfbd9 | 2246 | head->read_buf = buf; |
f23571e8 TH |
2247 | head->r.w[head->r.w_pos++] = buf; |
2248 | head->r.query_index++; | |
17fcfbd9 TH |
2249 | } else { |
2250 | kfree(buf); | |
2251 | } | |
17fcfbd9 TH |
2252 | } |
2253 | ||
2254 | /** | |
2255 | * tomoyo_write_answer - Write the supervisor's decision. | |
2256 | * | |
2257 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2258 | * | |
2259 | * Returns 0 on success, -EINVAL otherwise. | |
2260 | */ | |
2261 | static int tomoyo_write_answer(struct tomoyo_io_buffer *head) | |
2262 | { | |
2263 | char *data = head->write_buf; | |
2264 | struct list_head *tmp; | |
2265 | unsigned int serial; | |
2266 | unsigned int answer; | |
cdcf6723 | 2267 | |
17fcfbd9 TH |
2268 | spin_lock(&tomoyo_query_list_lock); |
2269 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 2270 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
cdcf6723 | 2271 | |
17fcfbd9 TH |
2272 | ptr->timer = 0; |
2273 | } | |
2274 | spin_unlock(&tomoyo_query_list_lock); | |
2275 | if (sscanf(data, "A%u=%u", &serial, &answer) != 2) | |
2276 | return -EINVAL; | |
2277 | spin_lock(&tomoyo_query_list_lock); | |
2278 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 2279 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
cdcf6723 | 2280 | |
17fcfbd9 TH |
2281 | if (ptr->serial != serial) |
2282 | continue; | |
6041e834 TH |
2283 | ptr->answer = answer; |
2284 | /* Remove from tomoyo_query_list. */ | |
2285 | if (ptr->answer) | |
2286 | list_del_init(&ptr->list); | |
17fcfbd9 TH |
2287 | break; |
2288 | } | |
2289 | spin_unlock(&tomoyo_query_list_lock); | |
2290 | return 0; | |
2291 | } | |
2292 | ||
9590837b KT |
2293 | /** |
2294 | * tomoyo_read_version: Get version. | |
2295 | * | |
2296 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2297 | * | |
2298 | * Returns version information. | |
2299 | */ | |
8fbe71f0 | 2300 | static void tomoyo_read_version(struct tomoyo_io_buffer *head) |
9590837b | 2301 | { |
f23571e8 | 2302 | if (!head->r.eof) { |
861f4bcf | 2303 | tomoyo_io_printf(head, "2.6.0"); |
f23571e8 | 2304 | head->r.eof = true; |
9590837b | 2305 | } |
9590837b KT |
2306 | } |
2307 | ||
b22b8b9f TH |
2308 | /* String table for /sys/kernel/security/tomoyo/stat interface. */ |
2309 | static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = { | |
2310 | [TOMOYO_STAT_POLICY_UPDATES] = "update:", | |
2311 | [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:", | |
2312 | [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:", | |
2313 | [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:", | |
2314 | }; | |
2315 | ||
2316 | /* String table for /sys/kernel/security/tomoyo/stat interface. */ | |
2317 | static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = { | |
2318 | [TOMOYO_MEMORY_POLICY] = "policy:", | |
2319 | [TOMOYO_MEMORY_AUDIT] = "audit log:", | |
2320 | [TOMOYO_MEMORY_QUERY] = "query message:", | |
2321 | }; | |
2322 | ||
2323 | /* Timestamp counter for last updated. */ | |
2324 | static unsigned int tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT]; | |
2325 | /* Counter for number of updates. */ | |
92734092 | 2326 | static time64_t tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT]; |
b22b8b9f TH |
2327 | |
2328 | /** | |
2329 | * tomoyo_update_stat - Update statistic counters. | |
2330 | * | |
2331 | * @index: Index for policy type. | |
2332 | * | |
2333 | * Returns nothing. | |
2334 | */ | |
2335 | void tomoyo_update_stat(const u8 index) | |
2336 | { | |
b22b8b9f TH |
2337 | /* |
2338 | * I don't use atomic operations because race condition is not fatal. | |
2339 | */ | |
2340 | tomoyo_stat_updated[index]++; | |
92734092 | 2341 | tomoyo_stat_modified[index] = ktime_get_real_seconds(); |
b22b8b9f TH |
2342 | } |
2343 | ||
2344 | /** | |
2345 | * tomoyo_read_stat - Read statistic data. | |
2346 | * | |
2347 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2348 | * | |
2349 | * Returns nothing. | |
2350 | */ | |
2351 | static void tomoyo_read_stat(struct tomoyo_io_buffer *head) | |
2352 | { | |
2353 | u8 i; | |
2354 | unsigned int total = 0; | |
cdcf6723 | 2355 | |
b22b8b9f TH |
2356 | if (head->r.eof) |
2357 | return; | |
2358 | for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) { | |
2359 | tomoyo_io_printf(head, "Policy %-30s %10u", | |
2360 | tomoyo_policy_headers[i], | |
2361 | tomoyo_stat_updated[i]); | |
2362 | if (tomoyo_stat_modified[i]) { | |
2363 | struct tomoyo_time stamp; | |
cdcf6723 | 2364 | |
b22b8b9f | 2365 | tomoyo_convert_time(tomoyo_stat_modified[i], &stamp); |
cdcf6723 | 2366 | tomoyo_io_printf(head, " (Last: %04u/%02u/%02u %02u:%02u:%02u)", |
b22b8b9f TH |
2367 | stamp.year, stamp.month, stamp.day, |
2368 | stamp.hour, stamp.min, stamp.sec); | |
2369 | } | |
2370 | tomoyo_set_lf(head); | |
2371 | } | |
2372 | for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) { | |
2373 | unsigned int used = tomoyo_memory_used[i]; | |
cdcf6723 | 2374 | |
b22b8b9f TH |
2375 | total += used; |
2376 | tomoyo_io_printf(head, "Memory used by %-22s %10u", | |
2377 | tomoyo_memory_headers[i], used); | |
2378 | used = tomoyo_memory_quota[i]; | |
2379 | if (used) | |
2380 | tomoyo_io_printf(head, " (Quota: %10u)", used); | |
2381 | tomoyo_set_lf(head); | |
2382 | } | |
2383 | tomoyo_io_printf(head, "Total memory used: %10u\n", | |
2384 | total); | |
2385 | head->r.eof = true; | |
2386 | } | |
2387 | ||
2388 | /** | |
2389 | * tomoyo_write_stat - Set memory quota. | |
2390 | * | |
2391 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2392 | * | |
2393 | * Returns 0. | |
2394 | */ | |
2395 | static int tomoyo_write_stat(struct tomoyo_io_buffer *head) | |
2396 | { | |
2397 | char *data = head->write_buf; | |
2398 | u8 i; | |
cdcf6723 | 2399 | |
b22b8b9f TH |
2400 | if (tomoyo_str_starts(&data, "Memory used by ")) |
2401 | for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) | |
2402 | if (tomoyo_str_starts(&data, tomoyo_memory_headers[i])) | |
2403 | sscanf(data, "%u", &tomoyo_memory_quota[i]); | |
2404 | return 0; | |
2405 | } | |
2406 | ||
9590837b KT |
2407 | /** |
2408 | * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface. | |
2409 | * | |
2410 | * @type: Type of interface. | |
2411 | * @file: Pointer to "struct file". | |
2412 | * | |
2e503bbb | 2413 | * Returns 0 on success, negative value otherwise. |
9590837b | 2414 | */ |
c3ef1500 | 2415 | int tomoyo_open_control(const u8 type, struct file *file) |
9590837b | 2416 | { |
4e5d6f7e | 2417 | struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS); |
9590837b KT |
2418 | |
2419 | if (!head) | |
2420 | return -ENOMEM; | |
2421 | mutex_init(&head->io_sem); | |
17fcfbd9 | 2422 | head->type = type; |
9590837b KT |
2423 | switch (type) { |
2424 | case TOMOYO_DOMAINPOLICY: | |
2425 | /* /sys/kernel/security/tomoyo/domain_policy */ | |
e2bf6907 TH |
2426 | head->write = tomoyo_write_domain; |
2427 | head->read = tomoyo_read_domain; | |
9590837b KT |
2428 | break; |
2429 | case TOMOYO_EXCEPTIONPOLICY: | |
2430 | /* /sys/kernel/security/tomoyo/exception_policy */ | |
e2bf6907 TH |
2431 | head->write = tomoyo_write_exception; |
2432 | head->read = tomoyo_read_exception; | |
9590837b | 2433 | break; |
eadd99cc TH |
2434 | case TOMOYO_AUDIT: |
2435 | /* /sys/kernel/security/tomoyo/audit */ | |
2436 | head->poll = tomoyo_poll_log; | |
2437 | head->read = tomoyo_read_log; | |
2438 | break; | |
9590837b KT |
2439 | case TOMOYO_PROCESS_STATUS: |
2440 | /* /sys/kernel/security/tomoyo/.process_status */ | |
2441 | head->write = tomoyo_write_pid; | |
2442 | head->read = tomoyo_read_pid; | |
2443 | break; | |
2444 | case TOMOYO_VERSION: | |
2445 | /* /sys/kernel/security/tomoyo/version */ | |
2446 | head->read = tomoyo_read_version; | |
2447 | head->readbuf_size = 128; | |
2448 | break; | |
b22b8b9f TH |
2449 | case TOMOYO_STAT: |
2450 | /* /sys/kernel/security/tomoyo/stat */ | |
2451 | head->write = tomoyo_write_stat; | |
2452 | head->read = tomoyo_read_stat; | |
2453 | head->readbuf_size = 1024; | |
9590837b KT |
2454 | break; |
2455 | case TOMOYO_PROFILE: | |
2456 | /* /sys/kernel/security/tomoyo/profile */ | |
2457 | head->write = tomoyo_write_profile; | |
2458 | head->read = tomoyo_read_profile; | |
2459 | break; | |
17fcfbd9 TH |
2460 | case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */ |
2461 | head->poll = tomoyo_poll_query; | |
2462 | head->write = tomoyo_write_answer; | |
2463 | head->read = tomoyo_read_query; | |
2464 | break; | |
9590837b KT |
2465 | case TOMOYO_MANAGER: |
2466 | /* /sys/kernel/security/tomoyo/manager */ | |
e2bf6907 TH |
2467 | head->write = tomoyo_write_manager; |
2468 | head->read = tomoyo_read_manager; | |
9590837b KT |
2469 | break; |
2470 | } | |
2471 | if (!(file->f_mode & FMODE_READ)) { | |
2472 | /* | |
2473 | * No need to allocate read_buf since it is not opened | |
2474 | * for reading. | |
2475 | */ | |
2476 | head->read = NULL; | |
17fcfbd9 TH |
2477 | head->poll = NULL; |
2478 | } else if (!head->poll) { | |
2479 | /* Don't allocate read_buf for poll() access. */ | |
9590837b KT |
2480 | if (!head->readbuf_size) |
2481 | head->readbuf_size = 4096 * 2; | |
4e5d6f7e | 2482 | head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS); |
9590837b | 2483 | if (!head->read_buf) { |
8e2d39a1 | 2484 | kfree(head); |
9590837b KT |
2485 | return -ENOMEM; |
2486 | } | |
2487 | } | |
2488 | if (!(file->f_mode & FMODE_WRITE)) { | |
2489 | /* | |
2490 | * No need to allocate write_buf since it is not opened | |
2491 | * for writing. | |
2492 | */ | |
2493 | head->write = NULL; | |
2494 | } else if (head->write) { | |
2495 | head->writebuf_size = 4096 * 2; | |
4e5d6f7e | 2496 | head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS); |
9590837b | 2497 | if (!head->write_buf) { |
8e2d39a1 TH |
2498 | kfree(head->read_buf); |
2499 | kfree(head); | |
9590837b KT |
2500 | return -ENOMEM; |
2501 | } | |
2502 | } | |
17fcfbd9 TH |
2503 | /* |
2504 | * If the file is /sys/kernel/security/tomoyo/query , increment the | |
2505 | * observer counter. | |
2506 | * The obserber counter is used by tomoyo_supervisor() to see if | |
2507 | * there is some process monitoring /sys/kernel/security/tomoyo/query. | |
2508 | */ | |
7c75964f | 2509 | if (type == TOMOYO_QUERY) |
17fcfbd9 | 2510 | atomic_inc(&tomoyo_query_observers); |
2e503bbb TH |
2511 | file->private_data = head; |
2512 | tomoyo_notify_gc(head, true); | |
9590837b KT |
2513 | return 0; |
2514 | } | |
2515 | ||
0849e3ba TH |
2516 | /** |
2517 | * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface. | |
2518 | * | |
2519 | * @file: Pointer to "struct file". | |
6041e834 | 2520 | * @wait: Pointer to "poll_table". Maybe NULL. |
0849e3ba | 2521 | * |
a9a08845 LT |
2522 | * Returns EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM if ready to read/write, |
2523 | * EPOLLOUT | EPOLLWRNORM otherwise. | |
0849e3ba | 2524 | */ |
c0d4be28 | 2525 | __poll_t tomoyo_poll_control(struct file *file, poll_table *wait) |
0849e3ba TH |
2526 | { |
2527 | struct tomoyo_io_buffer *head = file->private_data; | |
cdcf6723 | 2528 | |
6041e834 | 2529 | if (head->poll) |
a9a08845 LT |
2530 | return head->poll(file, wait) | EPOLLOUT | EPOLLWRNORM; |
2531 | return EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM; | |
0849e3ba TH |
2532 | } |
2533 | ||
bd03a3e4 TH |
2534 | /** |
2535 | * tomoyo_set_namespace_cursor - Set namespace to read. | |
2536 | * | |
2537 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2538 | * | |
2539 | * Returns nothing. | |
2540 | */ | |
2541 | static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head) | |
2542 | { | |
2543 | struct list_head *ns; | |
cdcf6723 | 2544 | |
bd03a3e4 TH |
2545 | if (head->type != TOMOYO_EXCEPTIONPOLICY && |
2546 | head->type != TOMOYO_PROFILE) | |
2547 | return; | |
2548 | /* | |
2549 | * If this is the first read, or reading previous namespace finished | |
2550 | * and has more namespaces to read, update the namespace cursor. | |
2551 | */ | |
2552 | ns = head->r.ns; | |
2553 | if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) { | |
2554 | /* Clearing is OK because tomoyo_flush() returned true. */ | |
2555 | memset(&head->r, 0, sizeof(head->r)); | |
2556 | head->r.ns = ns ? ns->next : tomoyo_namespace_list.next; | |
2557 | } | |
2558 | } | |
2559 | ||
2560 | /** | |
2561 | * tomoyo_has_more_namespace - Check for unread namespaces. | |
2562 | * | |
2563 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2564 | * | |
2565 | * Returns true if we have more entries to print, false otherwise. | |
2566 | */ | |
2567 | static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head) | |
2568 | { | |
2569 | return (head->type == TOMOYO_EXCEPTIONPOLICY || | |
2570 | head->type == TOMOYO_PROFILE) && head->r.eof && | |
2571 | head->r.ns->next != &tomoyo_namespace_list; | |
2572 | } | |
2573 | ||
9590837b KT |
2574 | /** |
2575 | * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface. | |
2576 | * | |
0df7e8b8 | 2577 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b KT |
2578 | * @buffer: Poiner to buffer to write to. |
2579 | * @buffer_len: Size of @buffer. | |
2580 | * | |
2581 | * Returns bytes read on success, negative value otherwise. | |
2582 | */ | |
2c47ab93 TH |
2583 | ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer, |
2584 | const int buffer_len) | |
9590837b | 2585 | { |
f23571e8 | 2586 | int len; |
2e503bbb | 2587 | int idx; |
9590837b KT |
2588 | |
2589 | if (!head->read) | |
cdcf6723 | 2590 | return -EINVAL; |
9590837b KT |
2591 | if (mutex_lock_interruptible(&head->io_sem)) |
2592 | return -EINTR; | |
f23571e8 TH |
2593 | head->read_user_buf = buffer; |
2594 | head->read_user_buf_avail = buffer_len; | |
2e503bbb | 2595 | idx = tomoyo_read_lock(); |
f23571e8 TH |
2596 | if (tomoyo_flush(head)) |
2597 | /* Call the policy handler. */ | |
bd03a3e4 TH |
2598 | do { |
2599 | tomoyo_set_namespace_cursor(head); | |
2600 | head->read(head); | |
2601 | } while (tomoyo_flush(head) && | |
2602 | tomoyo_has_more_namespace(head)); | |
2e503bbb | 2603 | tomoyo_read_unlock(idx); |
f23571e8 | 2604 | len = head->read_user_buf - buffer; |
9590837b KT |
2605 | mutex_unlock(&head->io_sem); |
2606 | return len; | |
2607 | } | |
2608 | ||
bd03a3e4 TH |
2609 | /** |
2610 | * tomoyo_parse_policy - Parse a policy line. | |
2611 | * | |
2612 | * @head: Poiter to "struct tomoyo_io_buffer". | |
2613 | * @line: Line to parse. | |
2614 | * | |
2615 | * Returns 0 on success, negative value otherwise. | |
2616 | * | |
2617 | * Caller holds tomoyo_read_lock(). | |
2618 | */ | |
2619 | static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line) | |
2620 | { | |
2621 | /* Delete request? */ | |
2622 | head->w.is_delete = !strncmp(line, "delete ", 7); | |
2623 | if (head->w.is_delete) | |
2624 | memmove(line, line + 7, strlen(line + 7) + 1); | |
2625 | /* Selecting namespace to update. */ | |
2626 | if (head->type == TOMOYO_EXCEPTIONPOLICY || | |
2627 | head->type == TOMOYO_PROFILE) { | |
2628 | if (*line == '<') { | |
2629 | char *cp = strchr(line, ' '); | |
cdcf6723 | 2630 | |
bd03a3e4 TH |
2631 | if (cp) { |
2632 | *cp++ = '\0'; | |
2633 | head->w.ns = tomoyo_assign_namespace(line); | |
2634 | memmove(line, cp, strlen(cp) + 1); | |
2635 | } else | |
2636 | head->w.ns = NULL; | |
2637 | } else | |
2638 | head->w.ns = &tomoyo_kernel_namespace; | |
2639 | /* Don't allow updating if namespace is invalid. */ | |
2640 | if (!head->w.ns) | |
2641 | return -ENOENT; | |
2642 | } | |
2643 | /* Do the update. */ | |
2644 | return head->write(head); | |
2645 | } | |
2646 | ||
9590837b KT |
2647 | /** |
2648 | * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface. | |
2649 | * | |
0df7e8b8 | 2650 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b KT |
2651 | * @buffer: Pointer to buffer to read from. |
2652 | * @buffer_len: Size of @buffer. | |
2653 | * | |
2654 | * Returns @buffer_len on success, negative value otherwise. | |
2655 | */ | |
2c47ab93 TH |
2656 | ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head, |
2657 | const char __user *buffer, const int buffer_len) | |
9590837b | 2658 | { |
9590837b | 2659 | int error = buffer_len; |
bd03a3e4 | 2660 | size_t avail_len = buffer_len; |
9590837b | 2661 | char *cp0 = head->write_buf; |
2e503bbb | 2662 | int idx; |
cdcf6723 | 2663 | |
9590837b | 2664 | if (!head->write) |
cdcf6723 | 2665 | return -EINVAL; |
96d4f267 | 2666 | if (!access_ok(buffer, buffer_len)) |
9590837b | 2667 | return -EFAULT; |
9590837b KT |
2668 | if (mutex_lock_interruptible(&head->io_sem)) |
2669 | return -EINTR; | |
e0b057b4 | 2670 | head->read_user_buf_avail = 0; |
2e503bbb | 2671 | idx = tomoyo_read_lock(); |
9590837b KT |
2672 | /* Read a line and dispatch it to the policy handler. */ |
2673 | while (avail_len > 0) { | |
2674 | char c; | |
cdcf6723 | 2675 | |
0df7e8b8 | 2676 | if (head->w.avail >= head->writebuf_size - 1) { |
bd03a3e4 TH |
2677 | const int len = head->writebuf_size * 2; |
2678 | char *cp = kzalloc(len, GFP_NOFS); | |
cdcf6723 | 2679 | |
bd03a3e4 TH |
2680 | if (!cp) { |
2681 | error = -ENOMEM; | |
2682 | break; | |
2683 | } | |
2684 | memmove(cp, cp0, head->w.avail); | |
2685 | kfree(cp0); | |
2686 | head->write_buf = cp; | |
2687 | cp0 = cp; | |
2688 | head->writebuf_size = len; | |
2689 | } | |
2690 | if (get_user(c, buffer)) { | |
9590837b KT |
2691 | error = -EFAULT; |
2692 | break; | |
2693 | } | |
2694 | buffer++; | |
2695 | avail_len--; | |
0df7e8b8 | 2696 | cp0[head->w.avail++] = c; |
9590837b KT |
2697 | if (c != '\n') |
2698 | continue; | |
0df7e8b8 TH |
2699 | cp0[head->w.avail - 1] = '\0'; |
2700 | head->w.avail = 0; | |
9590837b | 2701 | tomoyo_normalize_line(cp0); |
bd03a3e4 TH |
2702 | if (!strcmp(cp0, "reset")) { |
2703 | head->w.ns = &tomoyo_kernel_namespace; | |
2704 | head->w.domain = NULL; | |
2705 | memset(&head->r, 0, sizeof(head->r)); | |
2706 | continue; | |
2707 | } | |
2708 | /* Don't allow updating policies by non manager programs. */ | |
2709 | switch (head->type) { | |
2710 | case TOMOYO_PROCESS_STATUS: | |
2711 | /* This does not write anything. */ | |
2712 | break; | |
2713 | case TOMOYO_DOMAINPOLICY: | |
2714 | if (tomoyo_select_domain(head, cp0)) | |
2715 | continue; | |
2716 | /* fall through */ | |
2717 | case TOMOYO_EXCEPTIONPOLICY: | |
2718 | if (!strcmp(cp0, "select transition_only")) { | |
2719 | head->r.print_transition_related_only = true; | |
2720 | continue; | |
2721 | } | |
2722 | /* fall through */ | |
2723 | default: | |
2724 | if (!tomoyo_manager()) { | |
2725 | error = -EPERM; | |
2726 | goto out; | |
2727 | } | |
2728 | } | |
2729 | switch (tomoyo_parse_policy(head, cp0)) { | |
2730 | case -EPERM: | |
2731 | error = -EPERM; | |
2732 | goto out; | |
b22b8b9f TH |
2733 | case 0: |
2734 | switch (head->type) { | |
2735 | case TOMOYO_DOMAINPOLICY: | |
2736 | case TOMOYO_EXCEPTIONPOLICY: | |
b22b8b9f TH |
2737 | case TOMOYO_STAT: |
2738 | case TOMOYO_PROFILE: | |
2739 | case TOMOYO_MANAGER: | |
2740 | tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES); | |
2741 | break; | |
2742 | default: | |
2743 | break; | |
2744 | } | |
2745 | break; | |
bd03a3e4 | 2746 | } |
9590837b | 2747 | } |
bd03a3e4 | 2748 | out: |
2e503bbb | 2749 | tomoyo_read_unlock(idx); |
9590837b KT |
2750 | mutex_unlock(&head->io_sem); |
2751 | return error; | |
2752 | } | |
2753 | ||
2754 | /** | |
2755 | * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface. | |
2756 | * | |
0df7e8b8 | 2757 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b | 2758 | */ |
e53cfda5 | 2759 | void tomoyo_close_control(struct tomoyo_io_buffer *head) |
9590837b | 2760 | { |
17fcfbd9 TH |
2761 | /* |
2762 | * If the file is /sys/kernel/security/tomoyo/query , decrement the | |
2763 | * observer counter. | |
2764 | */ | |
2e503bbb TH |
2765 | if (head->type == TOMOYO_QUERY && |
2766 | atomic_dec_and_test(&tomoyo_query_observers)) | |
2767 | wake_up_all(&tomoyo_answer_wait); | |
2768 | tomoyo_notify_gc(head, false); | |
9590837b KT |
2769 | } |
2770 | ||
9590837b | 2771 | /** |
c3ef1500 | 2772 | * tomoyo_check_profile - Check all profiles currently assigned to domains are defined. |
9590837b | 2773 | */ |
c3ef1500 | 2774 | void tomoyo_check_profile(void) |
9590837b | 2775 | { |
c3ef1500 TH |
2776 | struct tomoyo_domain_info *domain; |
2777 | const int idx = tomoyo_read_lock(); | |
cdcf6723 | 2778 | |
c3ef1500 | 2779 | tomoyo_policy_loaded = true; |
861f4bcf | 2780 | pr_info("TOMOYO: 2.6.0\n"); |
c3ef1500 TH |
2781 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
2782 | const u8 profile = domain->profile; | |
861f4bcf | 2783 | struct tomoyo_policy_namespace *ns = domain->ns; |
cdcf6723 | 2784 | |
861f4bcf TH |
2785 | if (ns->profile_version == 20110903) { |
2786 | pr_info_once("Converting profile version from %u to %u.\n", | |
2787 | 20110903, 20150505); | |
2788 | ns->profile_version = 20150505; | |
2789 | } | |
2790 | if (ns->profile_version != 20150505) | |
cdcf6723 | 2791 | pr_err("Profile version %u is not supported.\n", |
bd03a3e4 TH |
2792 | ns->profile_version); |
2793 | else if (!ns->profile_ptr[profile]) | |
cdcf6723 | 2794 | pr_err("Profile %u (used by '%s') is not defined.\n", |
bd03a3e4 TH |
2795 | profile, domain->domainname->name); |
2796 | else | |
c3ef1500 | 2797 | continue; |
861f4bcf TH |
2798 | pr_err("Userland tools for TOMOYO 2.6 must be installed and policy must be initialized.\n"); |
2799 | pr_err("Please see https://tomoyo.osdn.jp/2.6/ for more information.\n"); | |
bd03a3e4 | 2800 | panic("STOP!"); |
c3ef1500 TH |
2801 | } |
2802 | tomoyo_read_unlock(idx); | |
cdcf6723 | 2803 | pr_info("Mandatory Access Control activated.\n"); |
9590837b | 2804 | } |
efe836ab TH |
2805 | |
2806 | /** | |
2807 | * tomoyo_load_builtin_policy - Load built-in policy. | |
2808 | * | |
2809 | * Returns nothing. | |
2810 | */ | |
2811 | void __init tomoyo_load_builtin_policy(void) | |
2812 | { | |
e80b1859 TH |
2813 | #ifdef CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING |
2814 | static char tomoyo_builtin_profile[] __initdata = | |
2815 | "PROFILE_VERSION=20150505\n" | |
2816 | "0-CONFIG={ mode=learning grant_log=no reject_log=yes }\n"; | |
2817 | static char tomoyo_builtin_exception_policy[] __initdata = | |
2818 | "aggregator proc:/self/exe /proc/self/exe\n"; | |
2819 | static char tomoyo_builtin_domain_policy[] __initdata = ""; | |
2820 | static char tomoyo_builtin_manager[] __initdata = ""; | |
2821 | static char tomoyo_builtin_stat[] __initdata = ""; | |
2822 | #else | |
efe836ab TH |
2823 | /* |
2824 | * This include file is manually created and contains built-in policy | |
2825 | * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy", | |
2826 | * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager", | |
2827 | * "tomoyo_builtin_stat" in the form of "static char [] __initdata". | |
2828 | */ | |
2829 | #include "builtin-policy.h" | |
e80b1859 | 2830 | #endif |
efe836ab TH |
2831 | u8 i; |
2832 | const int idx = tomoyo_read_lock(); | |
cdcf6723 | 2833 | |
efe836ab TH |
2834 | for (i = 0; i < 5; i++) { |
2835 | struct tomoyo_io_buffer head = { }; | |
2836 | char *start = ""; | |
cdcf6723 | 2837 | |
efe836ab TH |
2838 | switch (i) { |
2839 | case 0: | |
2840 | start = tomoyo_builtin_profile; | |
2841 | head.type = TOMOYO_PROFILE; | |
2842 | head.write = tomoyo_write_profile; | |
2843 | break; | |
2844 | case 1: | |
2845 | start = tomoyo_builtin_exception_policy; | |
2846 | head.type = TOMOYO_EXCEPTIONPOLICY; | |
2847 | head.write = tomoyo_write_exception; | |
2848 | break; | |
2849 | case 2: | |
2850 | start = tomoyo_builtin_domain_policy; | |
2851 | head.type = TOMOYO_DOMAINPOLICY; | |
2852 | head.write = tomoyo_write_domain; | |
2853 | break; | |
2854 | case 3: | |
2855 | start = tomoyo_builtin_manager; | |
2856 | head.type = TOMOYO_MANAGER; | |
2857 | head.write = tomoyo_write_manager; | |
2858 | break; | |
2859 | case 4: | |
2860 | start = tomoyo_builtin_stat; | |
2861 | head.type = TOMOYO_STAT; | |
2862 | head.write = tomoyo_write_stat; | |
2863 | break; | |
2864 | } | |
2865 | while (1) { | |
2866 | char *end = strchr(start, '\n'); | |
cdcf6723 | 2867 | |
efe836ab TH |
2868 | if (!end) |
2869 | break; | |
2870 | *end = '\0'; | |
2871 | tomoyo_normalize_line(start); | |
2872 | head.write_buf = start; | |
2873 | tomoyo_parse_policy(&head, start); | |
2874 | start = end + 1; | |
2875 | } | |
2876 | } | |
2877 | tomoyo_read_unlock(idx); | |
0e4ae0e0 TH |
2878 | #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER |
2879 | tomoyo_check_profile(); | |
2880 | #endif | |
efe836ab | 2881 | } |