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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> |
ea181a34 | 11 | #include <linux/string_helpers.h> |
9590837b | 12 | #include "common.h" |
9590837b | 13 | |
eadd99cc TH |
14 | /* String table for operation mode. */ |
15 | const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = { | |
16 | [TOMOYO_CONFIG_DISABLED] = "disabled", | |
17 | [TOMOYO_CONFIG_LEARNING] = "learning", | |
18 | [TOMOYO_CONFIG_PERMISSIVE] = "permissive", | |
19 | [TOMOYO_CONFIG_ENFORCING] = "enforcing" | |
9590837b | 20 | }; |
9590837b | 21 | |
57c2590f | 22 | /* String table for /sys/kernel/security/tomoyo/profile */ |
2c47ab93 | 23 | const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX |
57c2590f | 24 | + TOMOYO_MAX_MAC_CATEGORY_INDEX] = { |
d58e0da8 | 25 | /* CONFIG::file group */ |
2c47ab93 TH |
26 | [TOMOYO_MAC_FILE_EXECUTE] = "execute", |
27 | [TOMOYO_MAC_FILE_OPEN] = "open", | |
28 | [TOMOYO_MAC_FILE_CREATE] = "create", | |
29 | [TOMOYO_MAC_FILE_UNLINK] = "unlink", | |
30 | [TOMOYO_MAC_FILE_GETATTR] = "getattr", | |
31 | [TOMOYO_MAC_FILE_MKDIR] = "mkdir", | |
32 | [TOMOYO_MAC_FILE_RMDIR] = "rmdir", | |
33 | [TOMOYO_MAC_FILE_MKFIFO] = "mkfifo", | |
34 | [TOMOYO_MAC_FILE_MKSOCK] = "mksock", | |
35 | [TOMOYO_MAC_FILE_TRUNCATE] = "truncate", | |
36 | [TOMOYO_MAC_FILE_SYMLINK] = "symlink", | |
37 | [TOMOYO_MAC_FILE_MKBLOCK] = "mkblock", | |
38 | [TOMOYO_MAC_FILE_MKCHAR] = "mkchar", | |
39 | [TOMOYO_MAC_FILE_LINK] = "link", | |
40 | [TOMOYO_MAC_FILE_RENAME] = "rename", | |
41 | [TOMOYO_MAC_FILE_CHMOD] = "chmod", | |
42 | [TOMOYO_MAC_FILE_CHOWN] = "chown", | |
43 | [TOMOYO_MAC_FILE_CHGRP] = "chgrp", | |
44 | [TOMOYO_MAC_FILE_IOCTL] = "ioctl", | |
45 | [TOMOYO_MAC_FILE_CHROOT] = "chroot", | |
46 | [TOMOYO_MAC_FILE_MOUNT] = "mount", | |
47 | [TOMOYO_MAC_FILE_UMOUNT] = "unmount", | |
48 | [TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root", | |
059d84db TH |
49 | /* CONFIG::network group */ |
50 | [TOMOYO_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind", | |
51 | [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen", | |
52 | [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect", | |
53 | [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind", | |
54 | [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send", | |
55 | [TOMOYO_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind", | |
56 | [TOMOYO_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send", | |
57 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind", | |
58 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen", | |
59 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect", | |
60 | [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind", | |
61 | [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send", | |
62 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind", | |
63 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen", | |
64 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect", | |
d58e0da8 TH |
65 | /* CONFIG::misc group */ |
66 | [TOMOYO_MAC_ENVIRON] = "env", | |
67 | /* CONFIG group */ | |
57c2590f | 68 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file", |
059d84db | 69 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_NETWORK] = "network", |
d58e0da8 | 70 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_MISC] = "misc", |
9590837b KT |
71 | }; |
72 | ||
2066a361 TH |
73 | /* String table for conditions. */ |
74 | const char * const tomoyo_condition_keyword[TOMOYO_MAX_CONDITION_KEYWORD] = { | |
75 | [TOMOYO_TASK_UID] = "task.uid", | |
76 | [TOMOYO_TASK_EUID] = "task.euid", | |
77 | [TOMOYO_TASK_SUID] = "task.suid", | |
78 | [TOMOYO_TASK_FSUID] = "task.fsuid", | |
79 | [TOMOYO_TASK_GID] = "task.gid", | |
80 | [TOMOYO_TASK_EGID] = "task.egid", | |
81 | [TOMOYO_TASK_SGID] = "task.sgid", | |
82 | [TOMOYO_TASK_FSGID] = "task.fsgid", | |
83 | [TOMOYO_TASK_PID] = "task.pid", | |
84 | [TOMOYO_TASK_PPID] = "task.ppid", | |
5b636857 TH |
85 | [TOMOYO_EXEC_ARGC] = "exec.argc", |
86 | [TOMOYO_EXEC_ENVC] = "exec.envc", | |
8761afd4 TH |
87 | [TOMOYO_TYPE_IS_SOCKET] = "socket", |
88 | [TOMOYO_TYPE_IS_SYMLINK] = "symlink", | |
89 | [TOMOYO_TYPE_IS_FILE] = "file", | |
90 | [TOMOYO_TYPE_IS_BLOCK_DEV] = "block", | |
91 | [TOMOYO_TYPE_IS_DIRECTORY] = "directory", | |
92 | [TOMOYO_TYPE_IS_CHAR_DEV] = "char", | |
93 | [TOMOYO_TYPE_IS_FIFO] = "fifo", | |
94 | [TOMOYO_MODE_SETUID] = "setuid", | |
95 | [TOMOYO_MODE_SETGID] = "setgid", | |
96 | [TOMOYO_MODE_STICKY] = "sticky", | |
97 | [TOMOYO_MODE_OWNER_READ] = "owner_read", | |
98 | [TOMOYO_MODE_OWNER_WRITE] = "owner_write", | |
99 | [TOMOYO_MODE_OWNER_EXECUTE] = "owner_execute", | |
100 | [TOMOYO_MODE_GROUP_READ] = "group_read", | |
101 | [TOMOYO_MODE_GROUP_WRITE] = "group_write", | |
102 | [TOMOYO_MODE_GROUP_EXECUTE] = "group_execute", | |
103 | [TOMOYO_MODE_OTHERS_READ] = "others_read", | |
104 | [TOMOYO_MODE_OTHERS_WRITE] = "others_write", | |
105 | [TOMOYO_MODE_OTHERS_EXECUTE] = "others_execute", | |
2ca9bf45 TH |
106 | [TOMOYO_EXEC_REALPATH] = "exec.realpath", |
107 | [TOMOYO_SYMLINK_TARGET] = "symlink.target", | |
8761afd4 TH |
108 | [TOMOYO_PATH1_UID] = "path1.uid", |
109 | [TOMOYO_PATH1_GID] = "path1.gid", | |
110 | [TOMOYO_PATH1_INO] = "path1.ino", | |
111 | [TOMOYO_PATH1_MAJOR] = "path1.major", | |
112 | [TOMOYO_PATH1_MINOR] = "path1.minor", | |
113 | [TOMOYO_PATH1_PERM] = "path1.perm", | |
114 | [TOMOYO_PATH1_TYPE] = "path1.type", | |
115 | [TOMOYO_PATH1_DEV_MAJOR] = "path1.dev_major", | |
116 | [TOMOYO_PATH1_DEV_MINOR] = "path1.dev_minor", | |
117 | [TOMOYO_PATH2_UID] = "path2.uid", | |
118 | [TOMOYO_PATH2_GID] = "path2.gid", | |
119 | [TOMOYO_PATH2_INO] = "path2.ino", | |
120 | [TOMOYO_PATH2_MAJOR] = "path2.major", | |
121 | [TOMOYO_PATH2_MINOR] = "path2.minor", | |
122 | [TOMOYO_PATH2_PERM] = "path2.perm", | |
123 | [TOMOYO_PATH2_TYPE] = "path2.type", | |
124 | [TOMOYO_PATH2_DEV_MAJOR] = "path2.dev_major", | |
125 | [TOMOYO_PATH2_DEV_MINOR] = "path2.dev_minor", | |
126 | [TOMOYO_PATH1_PARENT_UID] = "path1.parent.uid", | |
127 | [TOMOYO_PATH1_PARENT_GID] = "path1.parent.gid", | |
128 | [TOMOYO_PATH1_PARENT_INO] = "path1.parent.ino", | |
129 | [TOMOYO_PATH1_PARENT_PERM] = "path1.parent.perm", | |
130 | [TOMOYO_PATH2_PARENT_UID] = "path2.parent.uid", | |
131 | [TOMOYO_PATH2_PARENT_GID] = "path2.parent.gid", | |
132 | [TOMOYO_PATH2_PARENT_INO] = "path2.parent.ino", | |
133 | [TOMOYO_PATH2_PARENT_PERM] = "path2.parent.perm", | |
2066a361 TH |
134 | }; |
135 | ||
d5ca1725 TH |
136 | /* String table for PREFERENCE keyword. */ |
137 | static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = { | |
eadd99cc | 138 | [TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log", |
d5ca1725 TH |
139 | [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry", |
140 | }; | |
141 | ||
2c47ab93 TH |
142 | /* String table for path operation. */ |
143 | const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = { | |
144 | [TOMOYO_TYPE_EXECUTE] = "execute", | |
145 | [TOMOYO_TYPE_READ] = "read", | |
146 | [TOMOYO_TYPE_WRITE] = "write", | |
147 | [TOMOYO_TYPE_APPEND] = "append", | |
148 | [TOMOYO_TYPE_UNLINK] = "unlink", | |
149 | [TOMOYO_TYPE_GETATTR] = "getattr", | |
150 | [TOMOYO_TYPE_RMDIR] = "rmdir", | |
151 | [TOMOYO_TYPE_TRUNCATE] = "truncate", | |
152 | [TOMOYO_TYPE_SYMLINK] = "symlink", | |
153 | [TOMOYO_TYPE_CHROOT] = "chroot", | |
154 | [TOMOYO_TYPE_UMOUNT] = "unmount", | |
155 | }; | |
156 | ||
059d84db TH |
157 | /* String table for socket's operation. */ |
158 | const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION] = { | |
159 | [TOMOYO_NETWORK_BIND] = "bind", | |
160 | [TOMOYO_NETWORK_LISTEN] = "listen", | |
161 | [TOMOYO_NETWORK_CONNECT] = "connect", | |
162 | [TOMOYO_NETWORK_SEND] = "send", | |
163 | }; | |
164 | ||
2c47ab93 TH |
165 | /* String table for categories. */ |
166 | static const char * const tomoyo_category_keywords | |
167 | [TOMOYO_MAX_MAC_CATEGORY_INDEX] = { | |
059d84db TH |
168 | [TOMOYO_MAC_CATEGORY_FILE] = "file", |
169 | [TOMOYO_MAC_CATEGORY_NETWORK] = "network", | |
170 | [TOMOYO_MAC_CATEGORY_MISC] = "misc", | |
2c47ab93 TH |
171 | }; |
172 | ||
9590837b KT |
173 | /* Permit policy management by non-root user? */ |
174 | static bool tomoyo_manage_by_non_root; | |
175 | ||
176 | /* Utility functions. */ | |
177 | ||
d5ca1725 TH |
178 | /** |
179 | * tomoyo_addprintf - strncat()-like-snprintf(). | |
180 | * | |
181 | * @buffer: Buffer to write to. Must be '\0'-terminated. | |
182 | * @len: Size of @buffer. | |
183 | * @fmt: The printf()'s format string, followed by parameters. | |
184 | * | |
185 | * Returns nothing. | |
186 | */ | |
f23571e8 TH |
187 | static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...) |
188 | { | |
189 | va_list args; | |
190 | const int pos = strlen(buffer); | |
cdcf6723 | 191 | |
f23571e8 TH |
192 | va_start(args, fmt); |
193 | vsnprintf(buffer + pos, len - pos - 1, fmt, args); | |
194 | va_end(args); | |
195 | } | |
196 | ||
7762fbff | 197 | /** |
f23571e8 | 198 | * tomoyo_flush - Flush queued string to userspace's buffer. |
7762fbff | 199 | * |
f23571e8 | 200 | * @head: Pointer to "struct tomoyo_io_buffer". |
7762fbff | 201 | * |
f23571e8 | 202 | * Returns true if all data was flushed, false otherwise. |
7762fbff | 203 | */ |
f23571e8 | 204 | static bool tomoyo_flush(struct tomoyo_io_buffer *head) |
7762fbff | 205 | { |
f23571e8 TH |
206 | while (head->r.w_pos) { |
207 | const char *w = head->r.w[0]; | |
2c47ab93 | 208 | size_t len = strlen(w); |
cdcf6723 | 209 | |
f23571e8 TH |
210 | if (len) { |
211 | if (len > head->read_user_buf_avail) | |
212 | len = head->read_user_buf_avail; | |
213 | if (!len) | |
214 | return false; | |
215 | if (copy_to_user(head->read_user_buf, w, len)) | |
216 | return false; | |
217 | head->read_user_buf_avail -= len; | |
218 | head->read_user_buf += len; | |
219 | w += len; | |
220 | } | |
c0fa797a TH |
221 | head->r.w[0] = w; |
222 | if (*w) | |
f23571e8 | 223 | return false; |
eadd99cc | 224 | /* Add '\0' for audit logs and query. */ |
f23571e8 TH |
225 | if (head->poll) { |
226 | if (!head->read_user_buf_avail || | |
227 | copy_to_user(head->read_user_buf, "", 1)) | |
228 | return false; | |
229 | head->read_user_buf_avail--; | |
230 | head->read_user_buf++; | |
231 | } | |
232 | head->r.w_pos--; | |
233 | for (len = 0; len < head->r.w_pos; len++) | |
234 | head->r.w[len] = head->r.w[len + 1]; | |
235 | } | |
236 | head->r.avail = 0; | |
237 | return true; | |
7762fbff TH |
238 | } |
239 | ||
4c3e9e2d | 240 | /** |
f23571e8 | 241 | * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure. |
4c3e9e2d | 242 | * |
f23571e8 TH |
243 | * @head: Pointer to "struct tomoyo_io_buffer". |
244 | * @string: String to print. | |
4c3e9e2d | 245 | * |
f23571e8 TH |
246 | * Note that @string has to be kept valid until @head is kfree()d. |
247 | * This means that char[] allocated on stack memory cannot be passed to | |
248 | * this function. Use tomoyo_io_printf() for char[] allocated on stack memory. | |
4c3e9e2d | 249 | */ |
f23571e8 | 250 | static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string) |
4c3e9e2d | 251 | { |
f23571e8 TH |
252 | if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) { |
253 | head->r.w[head->r.w_pos++] = string; | |
254 | tomoyo_flush(head); | |
255 | } else | |
256 | WARN_ON(1); | |
4c3e9e2d TH |
257 | } |
258 | ||
778c4a4d TH |
259 | static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, |
260 | ...) __printf(2, 3); | |
261 | ||
9590837b | 262 | /** |
f23571e8 | 263 | * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure. |
9590837b KT |
264 | * |
265 | * @head: Pointer to "struct tomoyo_io_buffer". | |
266 | * @fmt: The printf()'s format string, followed by parameters. | |
9590837b | 267 | */ |
778c4a4d TH |
268 | static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, |
269 | ...) | |
9590837b KT |
270 | { |
271 | va_list args; | |
2c47ab93 TH |
272 | size_t len; |
273 | size_t pos = head->r.avail; | |
9590837b | 274 | int size = head->readbuf_size - pos; |
cdcf6723 | 275 | |
9590837b | 276 | if (size <= 0) |
f23571e8 | 277 | return; |
9590837b | 278 | va_start(args, fmt); |
f23571e8 | 279 | len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1; |
9590837b | 280 | va_end(args); |
f23571e8 TH |
281 | if (pos + len >= head->readbuf_size) { |
282 | WARN_ON(1); | |
283 | return; | |
284 | } | |
285 | head->r.avail += len; | |
286 | tomoyo_set_string(head, head->read_buf + pos); | |
287 | } | |
288 | ||
0d2171d7 TH |
289 | /** |
290 | * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure. | |
291 | * | |
292 | * @head: Pointer to "struct tomoyo_io_buffer". | |
293 | * | |
294 | * Returns nothing. | |
295 | */ | |
f23571e8 TH |
296 | static void tomoyo_set_space(struct tomoyo_io_buffer *head) |
297 | { | |
298 | tomoyo_set_string(head, " "); | |
299 | } | |
300 | ||
0d2171d7 TH |
301 | /** |
302 | * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure. | |
303 | * | |
304 | * @head: Pointer to "struct tomoyo_io_buffer". | |
305 | * | |
306 | * Returns nothing. | |
307 | */ | |
f23571e8 TH |
308 | static bool tomoyo_set_lf(struct tomoyo_io_buffer *head) |
309 | { | |
310 | tomoyo_set_string(head, "\n"); | |
311 | return !head->r.w_pos; | |
312 | } | |
313 | ||
0d2171d7 TH |
314 | /** |
315 | * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure. | |
316 | * | |
317 | * @head: Pointer to "struct tomoyo_io_buffer". | |
318 | * | |
319 | * Returns nothing. | |
320 | */ | |
321 | static void tomoyo_set_slash(struct tomoyo_io_buffer *head) | |
322 | { | |
323 | tomoyo_set_string(head, "/"); | |
324 | } | |
325 | ||
bd03a3e4 TH |
326 | /* List of namespaces. */ |
327 | LIST_HEAD(tomoyo_namespace_list); | |
328 | /* True if namespace other than tomoyo_kernel_namespace is defined. */ | |
329 | static bool tomoyo_namespace_enabled; | |
330 | ||
331 | /** | |
332 | * tomoyo_init_policy_namespace - Initialize namespace. | |
333 | * | |
334 | * @ns: Pointer to "struct tomoyo_policy_namespace". | |
335 | * | |
336 | * Returns nothing. | |
337 | */ | |
338 | void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns) | |
339 | { | |
340 | unsigned int idx; | |
cdcf6723 | 341 | |
bd03a3e4 TH |
342 | for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++) |
343 | INIT_LIST_HEAD(&ns->acl_group[idx]); | |
344 | for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++) | |
345 | INIT_LIST_HEAD(&ns->group_list[idx]); | |
346 | for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++) | |
347 | INIT_LIST_HEAD(&ns->policy_list[idx]); | |
861f4bcf | 348 | ns->profile_version = 20150505; |
bd03a3e4 TH |
349 | tomoyo_namespace_enabled = !list_empty(&tomoyo_namespace_list); |
350 | list_add_tail_rcu(&ns->namespace_list, &tomoyo_namespace_list); | |
351 | } | |
352 | ||
353 | /** | |
354 | * tomoyo_print_namespace - Print namespace header. | |
355 | * | |
356 | * @head: Pointer to "struct tomoyo_io_buffer". | |
357 | * | |
358 | * Returns nothing. | |
359 | */ | |
360 | static void tomoyo_print_namespace(struct tomoyo_io_buffer *head) | |
361 | { | |
362 | if (!tomoyo_namespace_enabled) | |
363 | return; | |
364 | tomoyo_set_string(head, | |
365 | container_of(head->r.ns, | |
366 | struct tomoyo_policy_namespace, | |
367 | namespace_list)->name); | |
368 | tomoyo_set_space(head); | |
369 | } | |
370 | ||
f23571e8 TH |
371 | /** |
372 | * tomoyo_print_name_union - Print a tomoyo_name_union. | |
373 | * | |
374 | * @head: Pointer to "struct tomoyo_io_buffer". | |
375 | * @ptr: Pointer to "struct tomoyo_name_union". | |
376 | */ | |
377 | static void tomoyo_print_name_union(struct tomoyo_io_buffer *head, | |
378 | const struct tomoyo_name_union *ptr) | |
379 | { | |
380 | tomoyo_set_space(head); | |
0df7e8b8 | 381 | if (ptr->group) { |
f23571e8 TH |
382 | tomoyo_set_string(head, "@"); |
383 | tomoyo_set_string(head, ptr->group->group_name->name); | |
384 | } else { | |
385 | tomoyo_set_string(head, ptr->filename->name); | |
386 | } | |
387 | } | |
388 | ||
2ca9bf45 TH |
389 | /** |
390 | * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote. | |
391 | * | |
392 | * @head: Pointer to "struct tomoyo_io_buffer". | |
393 | * @ptr: Pointer to "struct tomoyo_name_union". | |
394 | * | |
395 | * Returns nothing. | |
396 | */ | |
397 | static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer *head, | |
398 | const struct tomoyo_name_union *ptr) | |
399 | { | |
400 | if (ptr->group) { | |
401 | tomoyo_set_string(head, "@"); | |
402 | tomoyo_set_string(head, ptr->group->group_name->name); | |
403 | } else { | |
404 | tomoyo_set_string(head, "\""); | |
405 | tomoyo_set_string(head, ptr->filename->name); | |
406 | tomoyo_set_string(head, "\""); | |
407 | } | |
408 | } | |
409 | ||
f23571e8 | 410 | /** |
2066a361 | 411 | * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space. |
f23571e8 | 412 | * |
2066a361 TH |
413 | * @head: Pointer to "struct tomoyo_io_buffer". |
414 | * @ptr: Pointer to "struct tomoyo_number_union". | |
415 | * | |
416 | * Returns nothing. | |
f23571e8 | 417 | */ |
2066a361 TH |
418 | static void tomoyo_print_number_union_nospace |
419 | (struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr) | |
f23571e8 | 420 | { |
0df7e8b8 | 421 | if (ptr->group) { |
f23571e8 TH |
422 | tomoyo_set_string(head, "@"); |
423 | tomoyo_set_string(head, ptr->group->group_name->name); | |
424 | } else { | |
425 | int i; | |
426 | unsigned long min = ptr->values[0]; | |
427 | const unsigned long max = ptr->values[1]; | |
0df7e8b8 TH |
428 | u8 min_type = ptr->value_type[0]; |
429 | const u8 max_type = ptr->value_type[1]; | |
f23571e8 | 430 | char buffer[128]; |
cdcf6723 | 431 | |
f23571e8 TH |
432 | buffer[0] = '\0'; |
433 | for (i = 0; i < 2; i++) { | |
434 | switch (min_type) { | |
435 | case TOMOYO_VALUE_TYPE_HEXADECIMAL: | |
436 | tomoyo_addprintf(buffer, sizeof(buffer), | |
437 | "0x%lX", min); | |
438 | break; | |
439 | case TOMOYO_VALUE_TYPE_OCTAL: | |
440 | tomoyo_addprintf(buffer, sizeof(buffer), | |
441 | "0%lo", min); | |
442 | break; | |
443 | default: | |
2066a361 TH |
444 | tomoyo_addprintf(buffer, sizeof(buffer), "%lu", |
445 | min); | |
f23571e8 TH |
446 | break; |
447 | } | |
448 | if (min == max && min_type == max_type) | |
449 | break; | |
450 | tomoyo_addprintf(buffer, sizeof(buffer), "-"); | |
451 | min_type = max_type; | |
452 | min = max; | |
453 | } | |
454 | tomoyo_io_printf(head, "%s", buffer); | |
455 | } | |
9590837b KT |
456 | } |
457 | ||
2066a361 TH |
458 | /** |
459 | * tomoyo_print_number_union - Print a tomoyo_number_union. | |
460 | * | |
461 | * @head: Pointer to "struct tomoyo_io_buffer". | |
462 | * @ptr: Pointer to "struct tomoyo_number_union". | |
463 | * | |
464 | * Returns nothing. | |
465 | */ | |
466 | static void tomoyo_print_number_union(struct tomoyo_io_buffer *head, | |
467 | const struct tomoyo_number_union *ptr) | |
468 | { | |
469 | tomoyo_set_space(head); | |
470 | tomoyo_print_number_union_nospace(head, ptr); | |
471 | } | |
472 | ||
9590837b | 473 | /** |
e2bf6907 | 474 | * tomoyo_assign_profile - Create a new profile. |
9590837b | 475 | * |
bd03a3e4 | 476 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
9590837b KT |
477 | * @profile: Profile number to create. |
478 | * | |
479 | * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise. | |
480 | */ | |
bd03a3e4 TH |
481 | static struct tomoyo_profile *tomoyo_assign_profile |
482 | (struct tomoyo_policy_namespace *ns, const unsigned int profile) | |
9590837b | 483 | { |
57c2590f TH |
484 | struct tomoyo_profile *ptr; |
485 | struct tomoyo_profile *entry; | |
cdcf6723 | 486 | |
9590837b KT |
487 | if (profile >= TOMOYO_MAX_PROFILES) |
488 | return NULL; | |
bd03a3e4 | 489 | ptr = ns->profile_ptr[profile]; |
9590837b | 490 | if (ptr) |
57c2590f | 491 | return ptr; |
1b6b924e | 492 | entry = kzalloc(sizeof(*entry), GFP_NOFS | __GFP_NOWARN); |
57c2590f TH |
493 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
494 | goto out; | |
bd03a3e4 | 495 | ptr = ns->profile_ptr[profile]; |
57c2590f TH |
496 | if (!ptr && tomoyo_memory_ok(entry)) { |
497 | ptr = entry; | |
eadd99cc TH |
498 | ptr->default_config = TOMOYO_CONFIG_DISABLED | |
499 | TOMOYO_CONFIG_WANT_GRANT_LOG | | |
500 | TOMOYO_CONFIG_WANT_REJECT_LOG; | |
57c2590f TH |
501 | memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT, |
502 | sizeof(ptr->config)); | |
6afcb3b7 TH |
503 | ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] = |
504 | CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG; | |
505 | ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] = | |
506 | CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY; | |
57c2590f | 507 | mb(); /* Avoid out-of-order execution. */ |
bd03a3e4 | 508 | ns->profile_ptr[profile] = ptr; |
57c2590f | 509 | entry = NULL; |
cd7bec6a | 510 | } |
29282381 | 511 | mutex_unlock(&tomoyo_policy_lock); |
57c2590f TH |
512 | out: |
513 | kfree(entry); | |
9590837b KT |
514 | return ptr; |
515 | } | |
516 | ||
517 | /** | |
57c2590f TH |
518 | * tomoyo_profile - Find a profile. |
519 | * | |
bd03a3e4 | 520 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
57c2590f TH |
521 | * @profile: Profile number to find. |
522 | * | |
523 | * Returns pointer to "struct tomoyo_profile". | |
524 | */ | |
bd03a3e4 TH |
525 | struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns, |
526 | const u8 profile) | |
57c2590f | 527 | { |
d5ca1725 | 528 | static struct tomoyo_profile tomoyo_null_profile; |
bd03a3e4 | 529 | struct tomoyo_profile *ptr = ns->profile_ptr[profile]; |
cdcf6723 | 530 | |
d5ca1725 TH |
531 | if (!ptr) |
532 | ptr = &tomoyo_null_profile; | |
57c2590f TH |
533 | return ptr; |
534 | } | |
535 | ||
d5ca1725 TH |
536 | /** |
537 | * tomoyo_find_yesno - Find values for specified keyword. | |
538 | * | |
539 | * @string: String to check. | |
540 | * @find: Name of keyword. | |
541 | * | |
542 | * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise. | |
543 | */ | |
8e568687 TH |
544 | static s8 tomoyo_find_yesno(const char *string, const char *find) |
545 | { | |
546 | const char *cp = strstr(string, find); | |
cdcf6723 | 547 | |
8e568687 TH |
548 | if (cp) { |
549 | cp += strlen(find); | |
550 | if (!strncmp(cp, "=yes", 4)) | |
551 | return 1; | |
552 | else if (!strncmp(cp, "=no", 3)) | |
553 | return 0; | |
554 | } | |
555 | return -1; | |
556 | } | |
557 | ||
d5ca1725 TH |
558 | /** |
559 | * tomoyo_set_uint - Set value for specified preference. | |
560 | * | |
561 | * @i: Pointer to "unsigned int". | |
562 | * @string: String to check. | |
563 | * @find: Name of keyword. | |
564 | * | |
565 | * Returns nothing. | |
566 | */ | |
8e568687 TH |
567 | static void tomoyo_set_uint(unsigned int *i, const char *string, |
568 | const char *find) | |
569 | { | |
570 | const char *cp = strstr(string, find); | |
cdcf6723 | 571 | |
8e568687 TH |
572 | if (cp) |
573 | sscanf(cp + strlen(find), "=%u", i); | |
574 | } | |
575 | ||
d5ca1725 TH |
576 | /** |
577 | * tomoyo_set_mode - Set mode for specified profile. | |
578 | * | |
579 | * @name: Name of functionality. | |
580 | * @value: Mode for @name. | |
581 | * @profile: Pointer to "struct tomoyo_profile". | |
582 | * | |
583 | * Returns 0 on success, negative value otherwise. | |
584 | */ | |
8e568687 | 585 | static int tomoyo_set_mode(char *name, const char *value, |
8e568687 TH |
586 | struct tomoyo_profile *profile) |
587 | { | |
588 | u8 i; | |
589 | u8 config; | |
cdcf6723 | 590 | |
8e568687 TH |
591 | if (!strcmp(name, "CONFIG")) { |
592 | i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX; | |
593 | config = profile->default_config; | |
594 | } else if (tomoyo_str_starts(&name, "CONFIG::")) { | |
595 | config = 0; | |
596 | for (i = 0; i < TOMOYO_MAX_MAC_INDEX | |
597 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) { | |
2c47ab93 | 598 | int len = 0; |
cdcf6723 | 599 | |
2c47ab93 TH |
600 | if (i < TOMOYO_MAX_MAC_INDEX) { |
601 | const u8 c = tomoyo_index2category[i]; | |
602 | const char *category = | |
603 | tomoyo_category_keywords[c]; | |
cdcf6723 | 604 | |
2c47ab93 TH |
605 | len = strlen(category); |
606 | if (strncmp(name, category, len) || | |
607 | name[len++] != ':' || name[len++] != ':') | |
608 | continue; | |
609 | } | |
610 | if (strcmp(name + len, tomoyo_mac_keywords[i])) | |
8e568687 TH |
611 | continue; |
612 | config = profile->config[i]; | |
613 | break; | |
614 | } | |
615 | if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) | |
616 | return -EINVAL; | |
617 | } else { | |
618 | return -EINVAL; | |
619 | } | |
d5ca1725 | 620 | if (strstr(value, "use_default")) { |
8e568687 TH |
621 | config = TOMOYO_CONFIG_USE_DEFAULT; |
622 | } else { | |
623 | u8 mode; | |
cdcf6723 | 624 | |
8e568687 TH |
625 | for (mode = 0; mode < 4; mode++) |
626 | if (strstr(value, tomoyo_mode[mode])) | |
627 | /* | |
628 | * Update lower 3 bits in order to distinguish | |
15269fb1 | 629 | * 'config' from 'TOMOYO_CONFIG_USE_DEFAULT'. |
8e568687 TH |
630 | */ |
631 | config = (config & ~7) | mode; | |
eadd99cc TH |
632 | if (config != TOMOYO_CONFIG_USE_DEFAULT) { |
633 | switch (tomoyo_find_yesno(value, "grant_log")) { | |
634 | case 1: | |
635 | config |= TOMOYO_CONFIG_WANT_GRANT_LOG; | |
636 | break; | |
637 | case 0: | |
638 | config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG; | |
639 | break; | |
640 | } | |
641 | switch (tomoyo_find_yesno(value, "reject_log")) { | |
642 | case 1: | |
643 | config |= TOMOYO_CONFIG_WANT_REJECT_LOG; | |
644 | break; | |
645 | case 0: | |
646 | config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG; | |
647 | break; | |
648 | } | |
649 | } | |
8e568687 TH |
650 | } |
651 | if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) | |
652 | profile->config[i] = config; | |
653 | else if (config != TOMOYO_CONFIG_USE_DEFAULT) | |
654 | profile->default_config = config; | |
655 | return 0; | |
656 | } | |
657 | ||
57c2590f TH |
658 | /** |
659 | * tomoyo_write_profile - Write profile table. | |
9590837b KT |
660 | * |
661 | * @head: Pointer to "struct tomoyo_io_buffer". | |
662 | * | |
663 | * Returns 0 on success, negative value otherwise. | |
664 | */ | |
665 | static int tomoyo_write_profile(struct tomoyo_io_buffer *head) | |
666 | { | |
667 | char *data = head->write_buf; | |
668 | unsigned int i; | |
9590837b KT |
669 | char *cp; |
670 | struct tomoyo_profile *profile; | |
cdcf6723 | 671 | |
bd03a3e4 TH |
672 | if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version) |
673 | == 1) | |
57c2590f TH |
674 | return 0; |
675 | i = simple_strtoul(data, &cp, 10); | |
d5ca1725 TH |
676 | if (*cp != '-') |
677 | return -EINVAL; | |
678 | data = cp + 1; | |
bd03a3e4 | 679 | profile = tomoyo_assign_profile(head->w.ns, i); |
d5ca1725 TH |
680 | if (!profile) |
681 | return -EINVAL; | |
9590837b KT |
682 | cp = strchr(data, '='); |
683 | if (!cp) | |
684 | return -EINVAL; | |
57c2590f | 685 | *cp++ = '\0'; |
9590837b | 686 | if (!strcmp(data, "COMMENT")) { |
2a086e5d TH |
687 | static DEFINE_SPINLOCK(lock); |
688 | const struct tomoyo_path_info *new_comment | |
689 | = tomoyo_get_name(cp); | |
690 | const struct tomoyo_path_info *old_comment; | |
cdcf6723 | 691 | |
2a086e5d TH |
692 | if (!new_comment) |
693 | return -ENOMEM; | |
694 | spin_lock(&lock); | |
695 | old_comment = profile->comment; | |
696 | profile->comment = new_comment; | |
697 | spin_unlock(&lock); | |
bf24fb01 | 698 | tomoyo_put_name(old_comment); |
9590837b KT |
699 | return 0; |
700 | } | |
d5ca1725 TH |
701 | if (!strcmp(data, "PREFERENCE")) { |
702 | for (i = 0; i < TOMOYO_MAX_PREF; i++) | |
703 | tomoyo_set_uint(&profile->pref[i], cp, | |
704 | tomoyo_pref_keywords[i]); | |
705 | return 0; | |
f23571e8 | 706 | } |
d5ca1725 | 707 | return tomoyo_set_mode(data, cp, profile); |
f23571e8 TH |
708 | } |
709 | ||
eadd99cc TH |
710 | /** |
711 | * tomoyo_print_config - Print mode for specified functionality. | |
712 | * | |
713 | * @head: Pointer to "struct tomoyo_io_buffer". | |
714 | * @config: Mode for that functionality. | |
715 | * | |
716 | * Returns nothing. | |
717 | * | |
718 | * Caller prints functionality's name. | |
719 | */ | |
f23571e8 TH |
720 | static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config) |
721 | { | |
eadd99cc TH |
722 | tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n", |
723 | tomoyo_mode[config & 3], | |
ea181a34 LDM |
724 | str_yes_no(config & TOMOYO_CONFIG_WANT_GRANT_LOG), |
725 | str_yes_no(config & TOMOYO_CONFIG_WANT_REJECT_LOG)); | |
f23571e8 TH |
726 | } |
727 | ||
9590837b | 728 | /** |
57c2590f | 729 | * tomoyo_read_profile - Read profile table. |
9590837b KT |
730 | * |
731 | * @head: Pointer to "struct tomoyo_io_buffer". | |
eadd99cc TH |
732 | * |
733 | * Returns nothing. | |
9590837b | 734 | */ |
8fbe71f0 | 735 | static void tomoyo_read_profile(struct tomoyo_io_buffer *head) |
9590837b | 736 | { |
f23571e8 | 737 | u8 index; |
bd03a3e4 TH |
738 | struct tomoyo_policy_namespace *ns = |
739 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
f23571e8 | 740 | const struct tomoyo_profile *profile; |
cdcf6723 | 741 | |
bd03a3e4 TH |
742 | if (head->r.eof) |
743 | return; | |
f23571e8 TH |
744 | next: |
745 | index = head->r.index; | |
bd03a3e4 | 746 | profile = ns->profile_ptr[index]; |
f23571e8 TH |
747 | switch (head->r.step) { |
748 | case 0: | |
bd03a3e4 TH |
749 | tomoyo_print_namespace(head); |
750 | tomoyo_io_printf(head, "PROFILE_VERSION=%u\n", | |
751 | ns->profile_version); | |
f23571e8 TH |
752 | head->r.step++; |
753 | break; | |
754 | case 1: | |
755 | for ( ; head->r.index < TOMOYO_MAX_PROFILES; | |
756 | head->r.index++) | |
bd03a3e4 | 757 | if (ns->profile_ptr[head->r.index]) |
f23571e8 | 758 | break; |
4d818971 TH |
759 | if (head->r.index == TOMOYO_MAX_PROFILES) { |
760 | head->r.eof = true; | |
f23571e8 | 761 | return; |
4d818971 | 762 | } |
f23571e8 TH |
763 | head->r.step++; |
764 | break; | |
765 | case 2: | |
766 | { | |
d5ca1725 | 767 | u8 i; |
f23571e8 TH |
768 | const struct tomoyo_path_info *comment = |
769 | profile->comment; | |
cdcf6723 | 770 | |
bd03a3e4 | 771 | tomoyo_print_namespace(head); |
f23571e8 TH |
772 | tomoyo_io_printf(head, "%u-COMMENT=", index); |
773 | tomoyo_set_string(head, comment ? comment->name : ""); | |
774 | tomoyo_set_lf(head); | |
4d818971 | 775 | tomoyo_print_namespace(head); |
d5ca1725 TH |
776 | tomoyo_io_printf(head, "%u-PREFERENCE={ ", index); |
777 | for (i = 0; i < TOMOYO_MAX_PREF; i++) | |
778 | tomoyo_io_printf(head, "%s=%u ", | |
779 | tomoyo_pref_keywords[i], | |
780 | profile->pref[i]); | |
781 | tomoyo_set_string(head, "}\n"); | |
f23571e8 TH |
782 | head->r.step++; |
783 | } | |
784 | break; | |
785 | case 3: | |
786 | { | |
bd03a3e4 | 787 | tomoyo_print_namespace(head); |
f23571e8 TH |
788 | tomoyo_io_printf(head, "%u-%s", index, "CONFIG"); |
789 | tomoyo_print_config(head, profile->default_config); | |
790 | head->r.bit = 0; | |
791 | head->r.step++; | |
792 | } | |
793 | break; | |
794 | case 4: | |
795 | for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX | |
796 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) { | |
797 | const u8 i = head->r.bit; | |
798 | const u8 config = profile->config[i]; | |
cdcf6723 | 799 | |
57c2590f TH |
800 | if (config == TOMOYO_CONFIG_USE_DEFAULT) |
801 | continue; | |
bd03a3e4 | 802 | tomoyo_print_namespace(head); |
2c47ab93 TH |
803 | if (i < TOMOYO_MAX_MAC_INDEX) |
804 | tomoyo_io_printf(head, "%u-CONFIG::%s::%s", | |
805 | index, | |
806 | tomoyo_category_keywords | |
807 | [tomoyo_index2category[i]], | |
808 | tomoyo_mac_keywords[i]); | |
809 | else | |
810 | tomoyo_io_printf(head, "%u-CONFIG::%s", index, | |
811 | tomoyo_mac_keywords[i]); | |
f23571e8 TH |
812 | tomoyo_print_config(head, config); |
813 | head->r.bit++; | |
814 | break; | |
815 | } | |
816 | if (head->r.bit == TOMOYO_MAX_MAC_INDEX | |
817 | + TOMOYO_MAX_MAC_CATEGORY_INDEX) { | |
f23571e8 TH |
818 | head->r.index++; |
819 | head->r.step = 1; | |
9590837b | 820 | } |
57c2590f | 821 | break; |
9590837b | 822 | } |
f23571e8 TH |
823 | if (tomoyo_flush(head)) |
824 | goto next; | |
9590837b KT |
825 | } |
826 | ||
0f2a55d5 TH |
827 | /** |
828 | * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry. | |
829 | * | |
830 | * @a: Pointer to "struct tomoyo_acl_head". | |
831 | * @b: Pointer to "struct tomoyo_acl_head". | |
832 | * | |
833 | * Returns true if @a == @b, false otherwise. | |
834 | */ | |
e2bf6907 TH |
835 | static bool tomoyo_same_manager(const struct tomoyo_acl_head *a, |
836 | const struct tomoyo_acl_head *b) | |
36f5e1ff | 837 | { |
e2bf6907 TH |
838 | return container_of(a, struct tomoyo_manager, head)->manager == |
839 | container_of(b, struct tomoyo_manager, head)->manager; | |
36f5e1ff TH |
840 | } |
841 | ||
9590837b KT |
842 | /** |
843 | * tomoyo_update_manager_entry - Add a manager entry. | |
844 | * | |
845 | * @manager: The path to manager or the domainnamme. | |
846 | * @is_delete: True if it is a delete request. | |
847 | * | |
848 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
849 | * |
850 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
851 | */ |
852 | static int tomoyo_update_manager_entry(const char *manager, | |
853 | const bool is_delete) | |
854 | { | |
e2bf6907 | 855 | struct tomoyo_manager e = { }; |
a238cf5b | 856 | struct tomoyo_acl_param param = { |
bd03a3e4 | 857 | /* .ns = &tomoyo_kernel_namespace, */ |
a238cf5b | 858 | .is_delete = is_delete, |
cdcf6723 | 859 | .list = &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER], |
a238cf5b TH |
860 | }; |
861 | int error = is_delete ? -ENOENT : -ENOMEM; | |
cdcf6723 | 862 | |
77b513dd TH |
863 | if (!tomoyo_correct_domain(manager) && |
864 | !tomoyo_correct_word(manager)) | |
865 | return -EINVAL; | |
9e4b50e9 | 866 | e.manager = tomoyo_get_name(manager); |
a238cf5b TH |
867 | if (e.manager) { |
868 | error = tomoyo_update_policy(&e.head, sizeof(e), ¶m, | |
869 | tomoyo_same_manager); | |
870 | tomoyo_put_name(e.manager); | |
871 | } | |
9590837b KT |
872 | return error; |
873 | } | |
874 | ||
875 | /** | |
e2bf6907 | 876 | * tomoyo_write_manager - Write manager policy. |
9590837b KT |
877 | * |
878 | * @head: Pointer to "struct tomoyo_io_buffer". | |
879 | * | |
880 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
881 | * |
882 | * Caller holds tomoyo_read_lock(). | |
9590837b | 883 | */ |
e2bf6907 | 884 | static int tomoyo_write_manager(struct tomoyo_io_buffer *head) |
9590837b KT |
885 | { |
886 | char *data = head->write_buf; | |
9590837b KT |
887 | |
888 | if (!strcmp(data, "manage_by_non_root")) { | |
bd03a3e4 | 889 | tomoyo_manage_by_non_root = !head->w.is_delete; |
9590837b KT |
890 | return 0; |
891 | } | |
bd03a3e4 | 892 | return tomoyo_update_manager_entry(data, head->w.is_delete); |
9590837b KT |
893 | } |
894 | ||
895 | /** | |
e2bf6907 | 896 | * tomoyo_read_manager - Read manager policy. |
9590837b KT |
897 | * |
898 | * @head: Pointer to "struct tomoyo_io_buffer". | |
899 | * | |
fdb8ebb7 | 900 | * Caller holds tomoyo_read_lock(). |
9590837b | 901 | */ |
e2bf6907 | 902 | static void tomoyo_read_manager(struct tomoyo_io_buffer *head) |
9590837b | 903 | { |
f23571e8 | 904 | if (head->r.eof) |
8fbe71f0 | 905 | return; |
cdcf6723 | 906 | list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER]) { |
e2bf6907 | 907 | struct tomoyo_manager *ptr = |
f23571e8 | 908 | list_entry(head->r.acl, typeof(*ptr), head.list); |
cdcf6723 | 909 | |
82e0f001 | 910 | if (ptr->head.is_deleted) |
9590837b | 911 | continue; |
f23571e8 TH |
912 | if (!tomoyo_flush(head)) |
913 | return; | |
914 | tomoyo_set_string(head, ptr->manager->name); | |
915 | tomoyo_set_lf(head); | |
9590837b | 916 | } |
f23571e8 | 917 | head->r.eof = true; |
9590837b KT |
918 | } |
919 | ||
920 | /** | |
e2bf6907 | 921 | * tomoyo_manager - Check whether the current process is a policy manager. |
9590837b KT |
922 | * |
923 | * Returns true if the current process is permitted to modify policy | |
924 | * via /sys/kernel/security/tomoyo/ interface. | |
fdb8ebb7 TH |
925 | * |
926 | * Caller holds tomoyo_read_lock(). | |
9590837b | 927 | */ |
e2bf6907 | 928 | static bool tomoyo_manager(void) |
9590837b | 929 | { |
e2bf6907 | 930 | struct tomoyo_manager *ptr; |
9590837b KT |
931 | const char *exe; |
932 | const struct task_struct *task = current; | |
933 | const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname; | |
e80b1859 | 934 | bool found = IS_ENABLED(CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING); |
9590837b KT |
935 | |
936 | if (!tomoyo_policy_loaded) | |
937 | return true; | |
609fcd1b EB |
938 | if (!tomoyo_manage_by_non_root && |
939 | (!uid_eq(task->cred->uid, GLOBAL_ROOT_UID) || | |
940 | !uid_eq(task->cred->euid, GLOBAL_ROOT_UID))) | |
9590837b | 941 | return false; |
9590837b KT |
942 | exe = tomoyo_get_exe(); |
943 | if (!exe) | |
944 | return false; | |
6bd5ce60 TH |
945 | list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER], head.list, |
946 | srcu_read_lock_held(&tomoyo_ss)) { | |
77b513dd TH |
947 | if (!ptr->head.is_deleted && |
948 | (!tomoyo_pathcmp(domainname, ptr->manager) || | |
949 | !strcmp(exe, ptr->manager->name))) { | |
9590837b KT |
950 | found = true; |
951 | break; | |
952 | } | |
953 | } | |
9590837b KT |
954 | if (!found) { /* Reduce error messages. */ |
955 | static pid_t last_pid; | |
956 | const pid_t pid = current->pid; | |
cdcf6723 | 957 | |
9590837b | 958 | if (last_pid != pid) { |
cdcf6723 TH |
959 | pr_warn("%s ( %s ) is not permitted to update policies.\n", |
960 | domainname->name, exe); | |
9590837b KT |
961 | last_pid = pid; |
962 | } | |
963 | } | |
8e2d39a1 | 964 | kfree(exe); |
9590837b KT |
965 | return found; |
966 | } | |
967 | ||
59df3166 TH |
968 | static struct tomoyo_domain_info *tomoyo_find_domain_by_qid |
969 | (unsigned int serial); | |
970 | ||
9590837b | 971 | /** |
bd03a3e4 | 972 | * tomoyo_select_domain - Parse select command. |
9590837b KT |
973 | * |
974 | * @head: Pointer to "struct tomoyo_io_buffer". | |
975 | * @data: String to parse. | |
976 | * | |
977 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
978 | * |
979 | * Caller holds tomoyo_read_lock(). | |
9590837b | 980 | */ |
bd03a3e4 TH |
981 | static bool tomoyo_select_domain(struct tomoyo_io_buffer *head, |
982 | const char *data) | |
9590837b KT |
983 | { |
984 | unsigned int pid; | |
985 | struct tomoyo_domain_info *domain = NULL; | |
9b244373 | 986 | bool global_pid = false; |
cdcf6723 | 987 | |
bd03a3e4 TH |
988 | if (strncmp(data, "select ", 7)) |
989 | return false; | |
990 | data += 7; | |
9b244373 TH |
991 | if (sscanf(data, "pid=%u", &pid) == 1 || |
992 | (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) { | |
9590837b | 993 | struct task_struct *p; |
cdcf6723 | 994 | |
1fcdc7c5 | 995 | rcu_read_lock(); |
9b244373 TH |
996 | if (global_pid) |
997 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
998 | else | |
999 | p = find_task_by_vpid(pid); | |
9590837b | 1000 | if (p) |
8c6cb983 | 1001 | domain = tomoyo_task(p)->domain_info; |
1fcdc7c5 | 1002 | rcu_read_unlock(); |
9590837b | 1003 | } else if (!strncmp(data, "domain=", 7)) { |
75093152 | 1004 | if (tomoyo_domain_def(data + 7)) |
9590837b | 1005 | domain = tomoyo_find_domain(data + 7); |
59df3166 TH |
1006 | } else if (sscanf(data, "Q=%u", &pid) == 1) { |
1007 | domain = tomoyo_find_domain_by_qid(pid); | |
9590837b KT |
1008 | } else |
1009 | return false; | |
0df7e8b8 | 1010 | head->w.domain = domain; |
9590837b KT |
1011 | /* Accessing read_buf is safe because head->io_sem is held. */ |
1012 | if (!head->read_buf) | |
1013 | return true; /* Do nothing if open(O_WRONLY). */ | |
f23571e8 TH |
1014 | memset(&head->r, 0, sizeof(head->r)); |
1015 | head->r.print_this_domain_only = true; | |
68eda8f5 DC |
1016 | if (domain) |
1017 | head->r.domain = &domain->list; | |
1018 | else | |
27acbf41 | 1019 | head->r.eof = true; |
9590837b | 1020 | tomoyo_io_printf(head, "# select %s\n", data); |
475e6fa3 TH |
1021 | if (domain && domain->is_deleted) |
1022 | tomoyo_io_printf(head, "# This is a deleted domain.\n"); | |
9590837b KT |
1023 | return true; |
1024 | } | |
1025 | ||
731d37aa TH |
1026 | /** |
1027 | * tomoyo_same_task_acl - Check for duplicated "struct tomoyo_task_acl" entry. | |
1028 | * | |
1029 | * @a: Pointer to "struct tomoyo_acl_info". | |
1030 | * @b: Pointer to "struct tomoyo_acl_info". | |
1031 | * | |
1032 | * Returns true if @a == @b, false otherwise. | |
1033 | */ | |
1034 | static bool tomoyo_same_task_acl(const struct tomoyo_acl_info *a, | |
cdcf6723 | 1035 | const struct tomoyo_acl_info *b) |
731d37aa TH |
1036 | { |
1037 | const struct tomoyo_task_acl *p1 = container_of(a, typeof(*p1), head); | |
1038 | const struct tomoyo_task_acl *p2 = container_of(b, typeof(*p2), head); | |
cdcf6723 | 1039 | |
731d37aa TH |
1040 | return p1->domainname == p2->domainname; |
1041 | } | |
1042 | ||
1043 | /** | |
1044 | * tomoyo_write_task - Update task related list. | |
1045 | * | |
1046 | * @param: Pointer to "struct tomoyo_acl_param". | |
1047 | * | |
1048 | * Returns 0 on success, negative value otherwise. | |
1049 | * | |
1050 | * Caller holds tomoyo_read_lock(). | |
1051 | */ | |
1052 | static int tomoyo_write_task(struct tomoyo_acl_param *param) | |
1053 | { | |
1054 | int error = -EINVAL; | |
cdcf6723 | 1055 | |
731d37aa TH |
1056 | if (tomoyo_str_starts(¶m->data, "manual_domain_transition ")) { |
1057 | struct tomoyo_task_acl e = { | |
1058 | .head.type = TOMOYO_TYPE_MANUAL_TASK_ACL, | |
1059 | .domainname = tomoyo_get_domainname(param), | |
1060 | }; | |
cdcf6723 | 1061 | |
731d37aa TH |
1062 | if (e.domainname) |
1063 | error = tomoyo_update_domain(&e.head, sizeof(e), param, | |
1064 | tomoyo_same_task_acl, | |
1065 | NULL); | |
1066 | tomoyo_put_name(e.domainname); | |
1067 | } | |
1068 | return error; | |
1069 | } | |
1070 | ||
ccf135f5 TH |
1071 | /** |
1072 | * tomoyo_delete_domain - Delete a domain. | |
1073 | * | |
1074 | * @domainname: The name of domain. | |
1075 | * | |
7d7473db | 1076 | * Returns 0 on success, negative value otherwise. |
fdb8ebb7 TH |
1077 | * |
1078 | * Caller holds tomoyo_read_lock(). | |
ccf135f5 TH |
1079 | */ |
1080 | static int tomoyo_delete_domain(char *domainname) | |
1081 | { | |
1082 | struct tomoyo_domain_info *domain; | |
1083 | struct tomoyo_path_info name; | |
1084 | ||
1085 | name.name = domainname; | |
1086 | tomoyo_fill_path_info(&name); | |
29282381 | 1087 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
7d7473db | 1088 | return -EINTR; |
ccf135f5 | 1089 | /* Is there an active domain? */ |
6bd5ce60 TH |
1090 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list, |
1091 | srcu_read_lock_held(&tomoyo_ss)) { | |
ccf135f5 TH |
1092 | /* Never delete tomoyo_kernel_domain */ |
1093 | if (domain == &tomoyo_kernel_domain) | |
1094 | continue; | |
1095 | if (domain->is_deleted || | |
1096 | tomoyo_pathcmp(domain->domainname, &name)) | |
1097 | continue; | |
1098 | domain->is_deleted = true; | |
1099 | break; | |
1100 | } | |
f737d95d | 1101 | mutex_unlock(&tomoyo_policy_lock); |
ccf135f5 TH |
1102 | return 0; |
1103 | } | |
1104 | ||
17fcfbd9 | 1105 | /** |
e2bf6907 | 1106 | * tomoyo_write_domain2 - Write domain policy. |
17fcfbd9 | 1107 | * |
bd03a3e4 | 1108 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
a238cf5b TH |
1109 | * @list: Pointer to "struct list_head". |
1110 | * @data: Policy to be interpreted. | |
1111 | * @is_delete: True if it is a delete request. | |
17fcfbd9 TH |
1112 | * |
1113 | * Returns 0 on success, negative value otherwise. | |
1114 | * | |
1115 | * Caller holds tomoyo_read_lock(). | |
1116 | */ | |
bd03a3e4 TH |
1117 | static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns, |
1118 | struct list_head *list, char *data, | |
e2bf6907 | 1119 | const bool is_delete) |
17fcfbd9 | 1120 | { |
a238cf5b | 1121 | struct tomoyo_acl_param param = { |
bd03a3e4 | 1122 | .ns = ns, |
a238cf5b TH |
1123 | .list = list, |
1124 | .data = data, | |
1125 | .is_delete = is_delete, | |
1126 | }; | |
1127 | static const struct { | |
1128 | const char *keyword; | |
cdcf6723 | 1129 | int (*write)(struct tomoyo_acl_param *param); |
731d37aa | 1130 | } tomoyo_callback[5] = { |
a238cf5b | 1131 | { "file ", tomoyo_write_file }, |
059d84db TH |
1132 | { "network inet ", tomoyo_write_inet_network }, |
1133 | { "network unix ", tomoyo_write_unix_network }, | |
d58e0da8 | 1134 | { "misc ", tomoyo_write_misc }, |
731d37aa | 1135 | { "task ", tomoyo_write_task }, |
a238cf5b TH |
1136 | }; |
1137 | u8 i; | |
d58e0da8 TH |
1138 | |
1139 | for (i = 0; i < ARRAY_SIZE(tomoyo_callback); i++) { | |
a238cf5b TH |
1140 | if (!tomoyo_str_starts(¶m.data, |
1141 | tomoyo_callback[i].keyword)) | |
1142 | continue; | |
1143 | return tomoyo_callback[i].write(¶m); | |
1144 | } | |
1145 | return -EINVAL; | |
17fcfbd9 TH |
1146 | } |
1147 | ||
2c47ab93 TH |
1148 | /* String table for domain flags. */ |
1149 | const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = { | |
1150 | [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n", | |
1151 | [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n", | |
1152 | }; | |
1153 | ||
9590837b | 1154 | /** |
e2bf6907 | 1155 | * tomoyo_write_domain - Write domain policy. |
9590837b KT |
1156 | * |
1157 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1158 | * | |
1159 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1160 | * |
1161 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1162 | */ |
e2bf6907 | 1163 | static int tomoyo_write_domain(struct tomoyo_io_buffer *head) |
9590837b KT |
1164 | { |
1165 | char *data = head->write_buf; | |
bd03a3e4 | 1166 | struct tomoyo_policy_namespace *ns; |
0df7e8b8 | 1167 | struct tomoyo_domain_info *domain = head->w.domain; |
bd03a3e4 TH |
1168 | const bool is_delete = head->w.is_delete; |
1169 | bool is_select = !is_delete && tomoyo_str_starts(&data, "select "); | |
4b425641 | 1170 | unsigned int idx; |
cdcf6723 | 1171 | |
bd03a3e4 | 1172 | if (*data == '<') { |
7d7473db | 1173 | int ret = 0; |
cdcf6723 | 1174 | |
9590837b KT |
1175 | domain = NULL; |
1176 | if (is_delete) | |
7d7473db | 1177 | ret = tomoyo_delete_domain(data); |
fdb8ebb7 | 1178 | else if (is_select) |
9590837b | 1179 | domain = tomoyo_find_domain(data); |
fdb8ebb7 | 1180 | else |
bd03a3e4 | 1181 | domain = tomoyo_assign_domain(data, false); |
0df7e8b8 | 1182 | head->w.domain = domain; |
7d7473db | 1183 | return ret; |
9590837b KT |
1184 | } |
1185 | if (!domain) | |
1186 | return -EINVAL; | |
bd03a3e4 | 1187 | ns = domain->ns; |
4b425641 TH |
1188 | if (sscanf(data, "use_profile %u", &idx) == 1 |
1189 | && idx < TOMOYO_MAX_PROFILES) { | |
1190 | if (!tomoyo_policy_loaded || ns->profile_ptr[idx]) | |
1191 | if (!is_delete) | |
1192 | domain->profile = (u8) idx; | |
9590837b KT |
1193 | return 0; |
1194 | } | |
4b425641 TH |
1195 | if (sscanf(data, "use_group %u\n", &idx) == 1 |
1196 | && idx < TOMOYO_MAX_ACL_GROUPS) { | |
32997144 | 1197 | if (!is_delete) |
4b425641 TH |
1198 | set_bit(idx, domain->group); |
1199 | else | |
1200 | clear_bit(idx, domain->group); | |
32997144 TH |
1201 | return 0; |
1202 | } | |
4b425641 TH |
1203 | for (idx = 0; idx < TOMOYO_MAX_DOMAIN_INFO_FLAGS; idx++) { |
1204 | const char *cp = tomoyo_dif[idx]; | |
cdcf6723 | 1205 | |
2c47ab93 TH |
1206 | if (strncmp(data, cp, strlen(cp) - 1)) |
1207 | continue; | |
4b425641 | 1208 | domain->flags[idx] = !is_delete; |
9b244373 TH |
1209 | return 0; |
1210 | } | |
bd03a3e4 TH |
1211 | return tomoyo_write_domain2(ns, &domain->acl_info_list, data, |
1212 | is_delete); | |
9590837b KT |
1213 | } |
1214 | ||
2066a361 TH |
1215 | /** |
1216 | * tomoyo_print_condition - Print condition part. | |
1217 | * | |
1218 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1219 | * @cond: Pointer to "struct tomoyo_condition". | |
1220 | * | |
1221 | * Returns true on success, false otherwise. | |
1222 | */ | |
1223 | static bool tomoyo_print_condition(struct tomoyo_io_buffer *head, | |
1224 | const struct tomoyo_condition *cond) | |
1225 | { | |
1226 | switch (head->r.cond_step) { | |
1227 | case 0: | |
1228 | head->r.cond_index = 0; | |
1229 | head->r.cond_step++; | |
6bce98ed TH |
1230 | if (cond->transit) { |
1231 | tomoyo_set_space(head); | |
1232 | tomoyo_set_string(head, cond->transit->name); | |
1233 | } | |
df561f66 | 1234 | fallthrough; |
2066a361 TH |
1235 | case 1: |
1236 | { | |
1237 | const u16 condc = cond->condc; | |
1238 | const struct tomoyo_condition_element *condp = | |
1239 | (typeof(condp)) (cond + 1); | |
1240 | const struct tomoyo_number_union *numbers_p = | |
1241 | (typeof(numbers_p)) (condp + condc); | |
2ca9bf45 TH |
1242 | const struct tomoyo_name_union *names_p = |
1243 | (typeof(names_p)) | |
1244 | (numbers_p + cond->numbers_count); | |
5b636857 TH |
1245 | const struct tomoyo_argv *argv = |
1246 | (typeof(argv)) (names_p + cond->names_count); | |
1247 | const struct tomoyo_envp *envp = | |
1248 | (typeof(envp)) (argv + cond->argc); | |
2066a361 | 1249 | u16 skip; |
cdcf6723 | 1250 | |
2066a361 TH |
1251 | for (skip = 0; skip < head->r.cond_index; skip++) { |
1252 | const u8 left = condp->left; | |
1253 | const u8 right = condp->right; | |
cdcf6723 | 1254 | |
2066a361 TH |
1255 | condp++; |
1256 | switch (left) { | |
5b636857 TH |
1257 | case TOMOYO_ARGV_ENTRY: |
1258 | argv++; | |
1259 | continue; | |
1260 | case TOMOYO_ENVP_ENTRY: | |
1261 | envp++; | |
1262 | continue; | |
2066a361 TH |
1263 | case TOMOYO_NUMBER_UNION: |
1264 | numbers_p++; | |
1265 | break; | |
1266 | } | |
1267 | switch (right) { | |
2ca9bf45 TH |
1268 | case TOMOYO_NAME_UNION: |
1269 | names_p++; | |
1270 | break; | |
2066a361 TH |
1271 | case TOMOYO_NUMBER_UNION: |
1272 | numbers_p++; | |
1273 | break; | |
1274 | } | |
1275 | } | |
1276 | while (head->r.cond_index < condc) { | |
1277 | const u8 match = condp->equals; | |
1278 | const u8 left = condp->left; | |
1279 | const u8 right = condp->right; | |
cdcf6723 | 1280 | |
2066a361 TH |
1281 | if (!tomoyo_flush(head)) |
1282 | return false; | |
1283 | condp++; | |
1284 | head->r.cond_index++; | |
1285 | tomoyo_set_space(head); | |
1286 | switch (left) { | |
5b636857 TH |
1287 | case TOMOYO_ARGV_ENTRY: |
1288 | tomoyo_io_printf(head, | |
1289 | "exec.argv[%lu]%s=\"", | |
cdcf6723 | 1290 | argv->index, argv->is_not ? "!" : ""); |
5b636857 TH |
1291 | tomoyo_set_string(head, |
1292 | argv->value->name); | |
1293 | tomoyo_set_string(head, "\""); | |
1294 | argv++; | |
1295 | continue; | |
1296 | case TOMOYO_ENVP_ENTRY: | |
1297 | tomoyo_set_string(head, | |
1298 | "exec.envp[\""); | |
1299 | tomoyo_set_string(head, | |
1300 | envp->name->name); | |
cdcf6723 | 1301 | tomoyo_io_printf(head, "\"]%s=", envp->is_not ? "!" : ""); |
5b636857 TH |
1302 | if (envp->value) { |
1303 | tomoyo_set_string(head, "\""); | |
cdcf6723 | 1304 | tomoyo_set_string(head, envp->value->name); |
5b636857 TH |
1305 | tomoyo_set_string(head, "\""); |
1306 | } else { | |
1307 | tomoyo_set_string(head, | |
1308 | "NULL"); | |
1309 | } | |
1310 | envp++; | |
1311 | continue; | |
2066a361 TH |
1312 | case TOMOYO_NUMBER_UNION: |
1313 | tomoyo_print_number_union_nospace | |
1314 | (head, numbers_p++); | |
1315 | break; | |
1316 | default: | |
1317 | tomoyo_set_string(head, | |
1318 | tomoyo_condition_keyword[left]); | |
1319 | break; | |
1320 | } | |
1321 | tomoyo_set_string(head, match ? "=" : "!="); | |
1322 | switch (right) { | |
2ca9bf45 TH |
1323 | case TOMOYO_NAME_UNION: |
1324 | tomoyo_print_name_union_quoted | |
1325 | (head, names_p++); | |
1326 | break; | |
2066a361 TH |
1327 | case TOMOYO_NUMBER_UNION: |
1328 | tomoyo_print_number_union_nospace | |
1329 | (head, numbers_p++); | |
1330 | break; | |
1331 | default: | |
1332 | tomoyo_set_string(head, | |
1333 | tomoyo_condition_keyword[right]); | |
1334 | break; | |
1335 | } | |
1336 | } | |
1337 | } | |
1338 | head->r.cond_step++; | |
df561f66 | 1339 | fallthrough; |
2066a361 TH |
1340 | case 2: |
1341 | if (!tomoyo_flush(head)) | |
1342 | break; | |
1343 | head->r.cond_step++; | |
df561f66 | 1344 | fallthrough; |
2066a361 | 1345 | case 3: |
1f067a68 TH |
1346 | if (cond->grant_log != TOMOYO_GRANTLOG_AUTO) |
1347 | tomoyo_io_printf(head, " grant_log=%s", | |
ea181a34 LDM |
1348 | str_yes_no(cond->grant_log == |
1349 | TOMOYO_GRANTLOG_YES)); | |
2066a361 TH |
1350 | tomoyo_set_lf(head); |
1351 | return true; | |
1352 | } | |
1353 | return false; | |
1354 | } | |
1355 | ||
9590837b | 1356 | /** |
32997144 | 1357 | * tomoyo_set_group - Print "acl_group " header keyword and category name. |
9590837b | 1358 | * |
0d2171d7 TH |
1359 | * @head: Pointer to "struct tomoyo_io_buffer". |
1360 | * @category: Category name. | |
9590837b | 1361 | * |
0d2171d7 | 1362 | * Returns nothing. |
9590837b | 1363 | */ |
0d2171d7 TH |
1364 | static void tomoyo_set_group(struct tomoyo_io_buffer *head, |
1365 | const char *category) | |
9590837b | 1366 | { |
bd03a3e4 TH |
1367 | if (head->type == TOMOYO_EXCEPTIONPOLICY) { |
1368 | tomoyo_print_namespace(head); | |
32997144 TH |
1369 | tomoyo_io_printf(head, "acl_group %u ", |
1370 | head->r.acl_group_index); | |
bd03a3e4 | 1371 | } |
0d2171d7 | 1372 | tomoyo_set_string(head, category); |
9590837b KT |
1373 | } |
1374 | ||
1375 | /** | |
5db5a39b | 1376 | * tomoyo_print_entry - Print an ACL entry. |
9590837b KT |
1377 | * |
1378 | * @head: Pointer to "struct tomoyo_io_buffer". | |
5db5a39b | 1379 | * @acl: Pointer to an ACL entry. |
9590837b KT |
1380 | * |
1381 | * Returns true on success, false otherwise. | |
1382 | */ | |
5db5a39b TH |
1383 | static bool tomoyo_print_entry(struct tomoyo_io_buffer *head, |
1384 | struct tomoyo_acl_info *acl) | |
9590837b | 1385 | { |
5db5a39b | 1386 | const u8 acl_type = acl->type; |
0d2171d7 | 1387 | bool first = true; |
f23571e8 | 1388 | u8 bit; |
9590837b | 1389 | |
2066a361 TH |
1390 | if (head->r.print_cond_part) |
1391 | goto print_cond_part; | |
5db5a39b TH |
1392 | if (acl->is_deleted) |
1393 | return true; | |
f23571e8 TH |
1394 | if (!tomoyo_flush(head)) |
1395 | return false; | |
1396 | else if (acl_type == TOMOYO_TYPE_PATH_ACL) { | |
5db5a39b TH |
1397 | struct tomoyo_path_acl *ptr = |
1398 | container_of(acl, typeof(*ptr), head); | |
1399 | const u16 perm = ptr->perm; | |
cdcf6723 | 1400 | |
0d2171d7 | 1401 | for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) { |
5db5a39b TH |
1402 | if (!(perm & (1 << bit))) |
1403 | continue; | |
bd03a3e4 | 1404 | if (head->r.print_transition_related_only && |
5db5a39b TH |
1405 | bit != TOMOYO_TYPE_EXECUTE) |
1406 | continue; | |
0d2171d7 TH |
1407 | if (first) { |
1408 | tomoyo_set_group(head, "file "); | |
1409 | first = false; | |
1410 | } else { | |
1411 | tomoyo_set_slash(head); | |
1412 | } | |
1413 | tomoyo_set_string(head, tomoyo_path_keyword[bit]); | |
5db5a39b | 1414 | } |
0d2171d7 TH |
1415 | if (first) |
1416 | return true; | |
f23571e8 | 1417 | tomoyo_print_name_union(head, &ptr->name); |
731d37aa TH |
1418 | } else if (acl_type == TOMOYO_TYPE_MANUAL_TASK_ACL) { |
1419 | struct tomoyo_task_acl *ptr = | |
1420 | container_of(acl, typeof(*ptr), head); | |
cdcf6723 | 1421 | |
731d37aa TH |
1422 | tomoyo_set_group(head, "task "); |
1423 | tomoyo_set_string(head, "manual_domain_transition "); | |
1424 | tomoyo_set_string(head, ptr->domainname->name); | |
bd03a3e4 | 1425 | } else if (head->r.print_transition_related_only) { |
5db5a39b TH |
1426 | return true; |
1427 | } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) { | |
1428 | struct tomoyo_path2_acl *ptr = | |
1429 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 | 1430 | const u8 perm = ptr->perm; |
cdcf6723 | 1431 | |
0d2171d7 TH |
1432 | for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) { |
1433 | if (!(perm & (1 << bit))) | |
1434 | continue; | |
1435 | if (first) { | |
1436 | tomoyo_set_group(head, "file "); | |
1437 | first = false; | |
1438 | } else { | |
1439 | tomoyo_set_slash(head); | |
1440 | } | |
1441 | tomoyo_set_string(head, tomoyo_mac_keywords | |
1442 | [tomoyo_pp2mac[bit]]); | |
1443 | } | |
1444 | if (first) | |
1445 | return true; | |
f23571e8 TH |
1446 | tomoyo_print_name_union(head, &ptr->name1); |
1447 | tomoyo_print_name_union(head, &ptr->name2); | |
5db5a39b TH |
1448 | } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) { |
1449 | struct tomoyo_path_number_acl *ptr = | |
1450 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 | 1451 | const u8 perm = ptr->perm; |
cdcf6723 | 1452 | |
0d2171d7 TH |
1453 | for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) { |
1454 | if (!(perm & (1 << bit))) | |
1455 | continue; | |
1456 | if (first) { | |
1457 | tomoyo_set_group(head, "file "); | |
1458 | first = false; | |
1459 | } else { | |
1460 | tomoyo_set_slash(head); | |
1461 | } | |
1462 | tomoyo_set_string(head, tomoyo_mac_keywords | |
1463 | [tomoyo_pn2mac[bit]]); | |
1464 | } | |
1465 | if (first) | |
1466 | return true; | |
f23571e8 TH |
1467 | tomoyo_print_name_union(head, &ptr->name); |
1468 | tomoyo_print_number_union(head, &ptr->number); | |
5db5a39b TH |
1469 | } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) { |
1470 | struct tomoyo_mkdev_acl *ptr = | |
1471 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 | 1472 | const u8 perm = ptr->perm; |
cdcf6723 | 1473 | |
0d2171d7 TH |
1474 | for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) { |
1475 | if (!(perm & (1 << bit))) | |
1476 | continue; | |
1477 | if (first) { | |
1478 | tomoyo_set_group(head, "file "); | |
1479 | first = false; | |
1480 | } else { | |
1481 | tomoyo_set_slash(head); | |
1482 | } | |
1483 | tomoyo_set_string(head, tomoyo_mac_keywords | |
1484 | [tomoyo_pnnn2mac[bit]]); | |
1485 | } | |
1486 | if (first) | |
1487 | return true; | |
f23571e8 TH |
1488 | tomoyo_print_name_union(head, &ptr->name); |
1489 | tomoyo_print_number_union(head, &ptr->mode); | |
1490 | tomoyo_print_number_union(head, &ptr->major); | |
1491 | tomoyo_print_number_union(head, &ptr->minor); | |
059d84db TH |
1492 | } else if (acl_type == TOMOYO_TYPE_INET_ACL) { |
1493 | struct tomoyo_inet_acl *ptr = | |
1494 | container_of(acl, typeof(*ptr), head); | |
1495 | const u8 perm = ptr->perm; | |
1496 | ||
1497 | for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) { | |
1498 | if (!(perm & (1 << bit))) | |
1499 | continue; | |
1500 | if (first) { | |
1501 | tomoyo_set_group(head, "network inet "); | |
1502 | tomoyo_set_string(head, tomoyo_proto_keyword | |
1503 | [ptr->protocol]); | |
1504 | tomoyo_set_space(head); | |
1505 | first = false; | |
1506 | } else { | |
1507 | tomoyo_set_slash(head); | |
1508 | } | |
1509 | tomoyo_set_string(head, tomoyo_socket_keyword[bit]); | |
1510 | } | |
1511 | if (first) | |
1512 | return true; | |
1513 | tomoyo_set_space(head); | |
1514 | if (ptr->address.group) { | |
1515 | tomoyo_set_string(head, "@"); | |
1516 | tomoyo_set_string(head, ptr->address.group->group_name | |
1517 | ->name); | |
1518 | } else { | |
1519 | char buf[128]; | |
cdcf6723 | 1520 | |
059d84db TH |
1521 | tomoyo_print_ip(buf, sizeof(buf), &ptr->address); |
1522 | tomoyo_io_printf(head, "%s", buf); | |
1523 | } | |
1524 | tomoyo_print_number_union(head, &ptr->port); | |
1525 | } else if (acl_type == TOMOYO_TYPE_UNIX_ACL) { | |
1526 | struct tomoyo_unix_acl *ptr = | |
1527 | container_of(acl, typeof(*ptr), head); | |
1528 | const u8 perm = ptr->perm; | |
1529 | ||
1530 | for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) { | |
1531 | if (!(perm & (1 << bit))) | |
1532 | continue; | |
1533 | if (first) { | |
1534 | tomoyo_set_group(head, "network unix "); | |
1535 | tomoyo_set_string(head, tomoyo_proto_keyword | |
1536 | [ptr->protocol]); | |
1537 | tomoyo_set_space(head); | |
1538 | first = false; | |
1539 | } else { | |
1540 | tomoyo_set_slash(head); | |
1541 | } | |
1542 | tomoyo_set_string(head, tomoyo_socket_keyword[bit]); | |
1543 | } | |
1544 | if (first) | |
1545 | return true; | |
1546 | tomoyo_print_name_union(head, &ptr->name); | |
5db5a39b TH |
1547 | } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) { |
1548 | struct tomoyo_mount_acl *ptr = | |
1549 | container_of(acl, typeof(*ptr), head); | |
cdcf6723 | 1550 | |
0d2171d7 | 1551 | tomoyo_set_group(head, "file mount"); |
f23571e8 TH |
1552 | tomoyo_print_name_union(head, &ptr->dev_name); |
1553 | tomoyo_print_name_union(head, &ptr->dir_name); | |
1554 | tomoyo_print_name_union(head, &ptr->fs_type); | |
1555 | tomoyo_print_number_union(head, &ptr->flags); | |
d58e0da8 TH |
1556 | } else if (acl_type == TOMOYO_TYPE_ENV_ACL) { |
1557 | struct tomoyo_env_acl *ptr = | |
1558 | container_of(acl, typeof(*ptr), head); | |
1559 | ||
1560 | tomoyo_set_group(head, "misc env "); | |
1561 | tomoyo_set_string(head, ptr->env->name); | |
a1f9bb6a | 1562 | } |
2066a361 TH |
1563 | if (acl->cond) { |
1564 | head->r.print_cond_part = true; | |
1565 | head->r.cond_step = 0; | |
1566 | if (!tomoyo_flush(head)) | |
1567 | return false; | |
1568 | print_cond_part: | |
1569 | if (!tomoyo_print_condition(head, acl->cond)) | |
1570 | return false; | |
1571 | head->r.print_cond_part = false; | |
1572 | } else { | |
1573 | tomoyo_set_lf(head); | |
1574 | } | |
f23571e8 TH |
1575 | return true; |
1576 | } | |
1577 | ||
1578 | /** | |
1579 | * tomoyo_read_domain2 - Read domain policy. | |
1580 | * | |
32997144 TH |
1581 | * @head: Pointer to "struct tomoyo_io_buffer". |
1582 | * @list: Pointer to "struct list_head". | |
f23571e8 TH |
1583 | * |
1584 | * Caller holds tomoyo_read_lock(). | |
1585 | * | |
1586 | * Returns true on success, false otherwise. | |
1587 | */ | |
1588 | static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head, | |
32997144 | 1589 | struct list_head *list) |
f23571e8 | 1590 | { |
32997144 | 1591 | list_for_each_cookie(head->r.acl, list) { |
f23571e8 TH |
1592 | struct tomoyo_acl_info *ptr = |
1593 | list_entry(head->r.acl, typeof(*ptr), list); | |
cdcf6723 | 1594 | |
f23571e8 TH |
1595 | if (!tomoyo_print_entry(head, ptr)) |
1596 | return false; | |
1597 | } | |
1598 | head->r.acl = NULL; | |
a1f9bb6a | 1599 | return true; |
a1f9bb6a TH |
1600 | } |
1601 | ||
9590837b | 1602 | /** |
e2bf6907 | 1603 | * tomoyo_read_domain - Read domain policy. |
9590837b KT |
1604 | * |
1605 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1606 | * | |
fdb8ebb7 | 1607 | * Caller holds tomoyo_read_lock(). |
9590837b | 1608 | */ |
e2bf6907 | 1609 | static void tomoyo_read_domain(struct tomoyo_io_buffer *head) |
9590837b | 1610 | { |
f23571e8 | 1611 | if (head->r.eof) |
8fbe71f0 | 1612 | return; |
f23571e8 | 1613 | list_for_each_cookie(head->r.domain, &tomoyo_domain_list) { |
475e6fa3 | 1614 | struct tomoyo_domain_info *domain = |
f23571e8 | 1615 | list_entry(head->r.domain, typeof(*domain), list); |
cdcf6723 TH |
1616 | u8 i; |
1617 | ||
f23571e8 TH |
1618 | switch (head->r.step) { |
1619 | case 0: | |
1620 | if (domain->is_deleted && | |
1621 | !head->r.print_this_domain_only) | |
1622 | continue; | |
1623 | /* Print domainname and flags. */ | |
1624 | tomoyo_set_string(head, domain->domainname->name); | |
1625 | tomoyo_set_lf(head); | |
b5bc60b4 | 1626 | tomoyo_io_printf(head, "use_profile %u\n", |
f23571e8 | 1627 | domain->profile); |
2c47ab93 TH |
1628 | for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++) |
1629 | if (domain->flags[i]) | |
1630 | tomoyo_set_string(head, tomoyo_dif[i]); | |
4b425641 | 1631 | head->r.index = 0; |
f23571e8 | 1632 | head->r.step++; |
df561f66 | 1633 | fallthrough; |
f23571e8 | 1634 | case 1: |
4b425641 TH |
1635 | while (head->r.index < TOMOYO_MAX_ACL_GROUPS) { |
1636 | i = head->r.index++; | |
1637 | if (!test_bit(i, domain->group)) | |
1638 | continue; | |
1639 | tomoyo_io_printf(head, "use_group %u\n", i); | |
1640 | if (!tomoyo_flush(head)) | |
1641 | return; | |
1642 | } | |
1643 | head->r.index = 0; | |
1644 | head->r.step++; | |
1645 | tomoyo_set_lf(head); | |
df561f66 | 1646 | fallthrough; |
4b425641 | 1647 | case 2: |
32997144 | 1648 | if (!tomoyo_read_domain2(head, &domain->acl_info_list)) |
f23571e8 TH |
1649 | return; |
1650 | head->r.step++; | |
1651 | if (!tomoyo_set_lf(head)) | |
1652 | return; | |
df561f66 | 1653 | fallthrough; |
4b425641 | 1654 | case 3: |
f23571e8 TH |
1655 | head->r.step = 0; |
1656 | if (head->r.print_this_domain_only) | |
1657 | goto done; | |
9590837b | 1658 | } |
9590837b | 1659 | } |
f23571e8 TH |
1660 | done: |
1661 | head->r.eof = true; | |
9590837b KT |
1662 | } |
1663 | ||
9590837b KT |
1664 | /** |
1665 | * tomoyo_write_pid: Specify PID to obtain domainname. | |
1666 | * | |
1667 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1668 | * | |
1669 | * Returns 0. | |
1670 | */ | |
1671 | static int tomoyo_write_pid(struct tomoyo_io_buffer *head) | |
1672 | { | |
f23571e8 | 1673 | head->r.eof = false; |
9590837b KT |
1674 | return 0; |
1675 | } | |
1676 | ||
1677 | /** | |
1678 | * tomoyo_read_pid - Get domainname of the specified PID. | |
1679 | * | |
1680 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1681 | * | |
1682 | * Returns the domainname which the specified PID is in on success, | |
1683 | * empty string otherwise. | |
1684 | * The PID is specified by tomoyo_write_pid() so that the user can obtain | |
1685 | * using read()/write() interface rather than sysctl() interface. | |
1686 | */ | |
8fbe71f0 | 1687 | static void tomoyo_read_pid(struct tomoyo_io_buffer *head) |
9590837b | 1688 | { |
f23571e8 TH |
1689 | char *buf = head->write_buf; |
1690 | bool global_pid = false; | |
1691 | unsigned int pid; | |
1692 | struct task_struct *p; | |
1693 | struct tomoyo_domain_info *domain = NULL; | |
1694 | ||
1695 | /* Accessing write_buf is safe because head->io_sem is held. */ | |
1696 | if (!buf) { | |
1697 | head->r.eof = true; | |
1698 | return; /* Do nothing if open(O_RDONLY). */ | |
9590837b | 1699 | } |
f23571e8 TH |
1700 | if (head->r.w_pos || head->r.eof) |
1701 | return; | |
1702 | head->r.eof = true; | |
1703 | if (tomoyo_str_starts(&buf, "global-pid ")) | |
1704 | global_pid = true; | |
dbdb75bd DX |
1705 | if (kstrtouint(buf, 10, &pid)) |
1706 | return; | |
f23571e8 | 1707 | rcu_read_lock(); |
f23571e8 TH |
1708 | if (global_pid) |
1709 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
1710 | else | |
1711 | p = find_task_by_vpid(pid); | |
1712 | if (p) | |
8c6cb983 | 1713 | domain = tomoyo_task(p)->domain_info; |
f23571e8 TH |
1714 | rcu_read_unlock(); |
1715 | if (!domain) | |
1716 | return; | |
1717 | tomoyo_io_printf(head, "%u %u ", pid, domain->profile); | |
1718 | tomoyo_set_string(head, domain->domainname->name); | |
9590837b KT |
1719 | } |
1720 | ||
0f2a55d5 | 1721 | /* String table for domain transition control keywords. */ |
5448ec4f | 1722 | static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = { |
bd03a3e4 TH |
1723 | [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ", |
1724 | [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ", | |
1725 | [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ", | |
1726 | [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ", | |
1727 | [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ", | |
1728 | [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ", | |
5448ec4f TH |
1729 | }; |
1730 | ||
0f2a55d5 | 1731 | /* String table for grouping keywords. */ |
e2bf6907 | 1732 | static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = { |
059d84db TH |
1733 | [TOMOYO_PATH_GROUP] = "path_group ", |
1734 | [TOMOYO_NUMBER_GROUP] = "number_group ", | |
1735 | [TOMOYO_ADDRESS_GROUP] = "address_group ", | |
e2bf6907 TH |
1736 | }; |
1737 | ||
9590837b | 1738 | /** |
e2bf6907 | 1739 | * tomoyo_write_exception - Write exception policy. |
9590837b KT |
1740 | * |
1741 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1742 | * | |
1743 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1744 | * |
1745 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1746 | */ |
e2bf6907 | 1747 | static int tomoyo_write_exception(struct tomoyo_io_buffer *head) |
9590837b | 1748 | { |
bd03a3e4 | 1749 | const bool is_delete = head->w.is_delete; |
a238cf5b | 1750 | struct tomoyo_acl_param param = { |
bd03a3e4 TH |
1751 | .ns = head->w.ns, |
1752 | .is_delete = is_delete, | |
a238cf5b | 1753 | .data = head->write_buf, |
e2bf6907 | 1754 | }; |
a238cf5b | 1755 | u8 i; |
cdcf6723 | 1756 | |
a238cf5b TH |
1757 | if (tomoyo_str_starts(¶m.data, "aggregator ")) |
1758 | return tomoyo_write_aggregator(¶m); | |
e2bf6907 | 1759 | for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++) |
a238cf5b TH |
1760 | if (tomoyo_str_starts(¶m.data, tomoyo_transition_type[i])) |
1761 | return tomoyo_write_transition_control(¶m, i); | |
e2bf6907 | 1762 | for (i = 0; i < TOMOYO_MAX_GROUP; i++) |
a238cf5b TH |
1763 | if (tomoyo_str_starts(¶m.data, tomoyo_group_name[i])) |
1764 | return tomoyo_write_group(¶m, i); | |
32997144 TH |
1765 | if (tomoyo_str_starts(¶m.data, "acl_group ")) { |
1766 | unsigned int group; | |
1767 | char *data; | |
cdcf6723 | 1768 | |
32997144 TH |
1769 | group = simple_strtoul(param.data, &data, 10); |
1770 | if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ') | |
bd03a3e4 TH |
1771 | return tomoyo_write_domain2 |
1772 | (head->w.ns, &head->w.ns->acl_group[group], | |
1773 | data, is_delete); | |
32997144 | 1774 | } |
9590837b KT |
1775 | return -EINVAL; |
1776 | } | |
1777 | ||
1778 | /** | |
059d84db | 1779 | * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list. |
9590837b KT |
1780 | * |
1781 | * @head: Pointer to "struct tomoyo_io_buffer". | |
31845e8c TH |
1782 | * @idx: Index number. |
1783 | * | |
1784 | * Returns true on success, false otherwise. | |
9590837b | 1785 | * |
fdb8ebb7 | 1786 | * Caller holds tomoyo_read_lock(). |
9590837b | 1787 | */ |
31845e8c | 1788 | static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx) |
9590837b | 1789 | { |
bd03a3e4 TH |
1790 | struct tomoyo_policy_namespace *ns = |
1791 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
1792 | struct list_head *list = &ns->group_list[idx]; | |
cdcf6723 | 1793 | |
bd03a3e4 | 1794 | list_for_each_cookie(head->r.group, list) { |
31845e8c | 1795 | struct tomoyo_group *group = |
0df7e8b8 | 1796 | list_entry(head->r.group, typeof(*group), head.list); |
cdcf6723 | 1797 | |
f23571e8 | 1798 | list_for_each_cookie(head->r.acl, &group->member_list) { |
31845e8c | 1799 | struct tomoyo_acl_head *ptr = |
f23571e8 | 1800 | list_entry(head->r.acl, typeof(*ptr), list); |
cdcf6723 | 1801 | |
31845e8c TH |
1802 | if (ptr->is_deleted) |
1803 | continue; | |
f23571e8 TH |
1804 | if (!tomoyo_flush(head)) |
1805 | return false; | |
bd03a3e4 | 1806 | tomoyo_print_namespace(head); |
f23571e8 TH |
1807 | tomoyo_set_string(head, tomoyo_group_name[idx]); |
1808 | tomoyo_set_string(head, group->group_name->name); | |
31845e8c | 1809 | if (idx == TOMOYO_PATH_GROUP) { |
f23571e8 TH |
1810 | tomoyo_set_space(head); |
1811 | tomoyo_set_string(head, container_of | |
1812 | (ptr, struct tomoyo_path_group, | |
1813 | head)->member_name->name); | |
31845e8c | 1814 | } else if (idx == TOMOYO_NUMBER_GROUP) { |
f23571e8 TH |
1815 | tomoyo_print_number_union(head, &container_of |
1816 | (ptr, | |
1817 | struct tomoyo_number_group, | |
1818 | head)->number); | |
059d84db TH |
1819 | } else if (idx == TOMOYO_ADDRESS_GROUP) { |
1820 | char buffer[128]; | |
059d84db TH |
1821 | struct tomoyo_address_group *member = |
1822 | container_of(ptr, typeof(*member), | |
1823 | head); | |
cdcf6723 | 1824 | |
059d84db TH |
1825 | tomoyo_print_ip(buffer, sizeof(buffer), |
1826 | &member->address); | |
1827 | tomoyo_io_printf(head, " %s", buffer); | |
31845e8c | 1828 | } |
f23571e8 | 1829 | tomoyo_set_lf(head); |
31845e8c | 1830 | } |
f23571e8 | 1831 | head->r.acl = NULL; |
31845e8c | 1832 | } |
f23571e8 | 1833 | head->r.group = NULL; |
31845e8c TH |
1834 | return true; |
1835 | } | |
1836 | ||
1837 | /** | |
1838 | * tomoyo_read_policy - Read "struct tomoyo_..._entry" list. | |
1839 | * | |
1840 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1841 | * @idx: Index number. | |
1842 | * | |
1843 | * Returns true on success, false otherwise. | |
1844 | * | |
1845 | * Caller holds tomoyo_read_lock(). | |
1846 | */ | |
1847 | static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx) | |
1848 | { | |
bd03a3e4 TH |
1849 | struct tomoyo_policy_namespace *ns = |
1850 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
1851 | struct list_head *list = &ns->policy_list[idx]; | |
cdcf6723 | 1852 | |
bd03a3e4 | 1853 | list_for_each_cookie(head->r.acl, list) { |
475e6fa3 | 1854 | struct tomoyo_acl_head *acl = |
f23571e8 | 1855 | container_of(head->r.acl, typeof(*acl), list); |
31845e8c TH |
1856 | if (acl->is_deleted) |
1857 | continue; | |
f23571e8 TH |
1858 | if (!tomoyo_flush(head)) |
1859 | return false; | |
31845e8c | 1860 | switch (idx) { |
5448ec4f | 1861 | case TOMOYO_ID_TRANSITION_CONTROL: |
31845e8c | 1862 | { |
5448ec4f | 1863 | struct tomoyo_transition_control *ptr = |
31845e8c | 1864 | container_of(acl, typeof(*ptr), head); |
cdcf6723 | 1865 | |
bd03a3e4 | 1866 | tomoyo_print_namespace(head); |
0d2171d7 | 1867 | tomoyo_set_string(head, tomoyo_transition_type |
f23571e8 | 1868 | [ptr->type]); |
0d2171d7 TH |
1869 | tomoyo_set_string(head, ptr->program ? |
1870 | ptr->program->name : "any"); | |
1871 | tomoyo_set_string(head, " from "); | |
1872 | tomoyo_set_string(head, ptr->domainname ? | |
1873 | ptr->domainname->name : | |
1874 | "any"); | |
31845e8c TH |
1875 | } |
1876 | break; | |
31845e8c TH |
1877 | case TOMOYO_ID_AGGREGATOR: |
1878 | { | |
e2bf6907 | 1879 | struct tomoyo_aggregator *ptr = |
31845e8c | 1880 | container_of(acl, typeof(*ptr), head); |
cdcf6723 | 1881 | |
bd03a3e4 | 1882 | tomoyo_print_namespace(head); |
b5bc60b4 | 1883 | tomoyo_set_string(head, "aggregator "); |
f23571e8 TH |
1884 | tomoyo_set_string(head, |
1885 | ptr->original_name->name); | |
1886 | tomoyo_set_space(head); | |
1887 | tomoyo_set_string(head, | |
1888 | ptr->aggregated_name->name); | |
31845e8c TH |
1889 | } |
1890 | break; | |
31845e8c TH |
1891 | default: |
1892 | continue; | |
9590837b | 1893 | } |
f23571e8 | 1894 | tomoyo_set_lf(head); |
9590837b | 1895 | } |
f23571e8 | 1896 | head->r.acl = NULL; |
31845e8c TH |
1897 | return true; |
1898 | } | |
1899 | ||
1900 | /** | |
e2bf6907 | 1901 | * tomoyo_read_exception - Read exception policy. |
31845e8c TH |
1902 | * |
1903 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1904 | * | |
1905 | * Caller holds tomoyo_read_lock(). | |
1906 | */ | |
e2bf6907 | 1907 | static void tomoyo_read_exception(struct tomoyo_io_buffer *head) |
31845e8c | 1908 | { |
bd03a3e4 TH |
1909 | struct tomoyo_policy_namespace *ns = |
1910 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
cdcf6723 | 1911 | |
f23571e8 | 1912 | if (head->r.eof) |
31845e8c | 1913 | return; |
f23571e8 TH |
1914 | while (head->r.step < TOMOYO_MAX_POLICY && |
1915 | tomoyo_read_policy(head, head->r.step)) | |
1916 | head->r.step++; | |
1917 | if (head->r.step < TOMOYO_MAX_POLICY) | |
31845e8c | 1918 | return; |
f23571e8 TH |
1919 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP && |
1920 | tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY)) | |
1921 | head->r.step++; | |
1922 | if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP) | |
31845e8c | 1923 | return; |
32997144 TH |
1924 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP |
1925 | + TOMOYO_MAX_ACL_GROUPS) { | |
1926 | head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY | |
1927 | - TOMOYO_MAX_GROUP; | |
bd03a3e4 | 1928 | if (!tomoyo_read_domain2(head, &ns->acl_group |
32997144 TH |
1929 | [head->r.acl_group_index])) |
1930 | return; | |
1931 | head->r.step++; | |
1932 | } | |
f23571e8 | 1933 | head->r.eof = true; |
9590837b KT |
1934 | } |
1935 | ||
eadd99cc | 1936 | /* Wait queue for kernel -> userspace notification. */ |
17fcfbd9 | 1937 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait); |
eadd99cc TH |
1938 | /* Wait queue for userspace -> kernel notification. */ |
1939 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait); | |
17fcfbd9 TH |
1940 | |
1941 | /* Structure for query. */ | |
e2bf6907 | 1942 | struct tomoyo_query { |
17fcfbd9 | 1943 | struct list_head list; |
59df3166 | 1944 | struct tomoyo_domain_info *domain; |
17fcfbd9 | 1945 | char *query; |
eadd99cc | 1946 | size_t query_len; |
17fcfbd9 | 1947 | unsigned int serial; |
eadd99cc TH |
1948 | u8 timer; |
1949 | u8 answer; | |
1950 | u8 retry; | |
17fcfbd9 TH |
1951 | }; |
1952 | ||
e2bf6907 | 1953 | /* The list for "struct tomoyo_query". */ |
17fcfbd9 TH |
1954 | static LIST_HEAD(tomoyo_query_list); |
1955 | ||
eadd99cc TH |
1956 | /* Lock for manipulating tomoyo_query_list. */ |
1957 | static DEFINE_SPINLOCK(tomoyo_query_list_lock); | |
1958 | ||
17fcfbd9 TH |
1959 | /* |
1960 | * Number of "struct file" referring /sys/kernel/security/tomoyo/query | |
1961 | * interface. | |
1962 | */ | |
1963 | static atomic_t tomoyo_query_observers = ATOMIC_INIT(0); | |
1964 | ||
2ca9bf45 TH |
1965 | /** |
1966 | * tomoyo_truncate - Truncate a line. | |
1967 | * | |
1968 | * @str: String to truncate. | |
1969 | * | |
1970 | * Returns length of truncated @str. | |
1971 | */ | |
1972 | static int tomoyo_truncate(char *str) | |
1973 | { | |
1974 | char *start = str; | |
cdcf6723 | 1975 | |
2ca9bf45 TH |
1976 | while (*(unsigned char *) str > (unsigned char) ' ') |
1977 | str++; | |
1978 | *str = '\0'; | |
1979 | return strlen(start) + 1; | |
1980 | } | |
1981 | ||
eadd99cc TH |
1982 | /** |
1983 | * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode. | |
1984 | * | |
1985 | * @domain: Pointer to "struct tomoyo_domain_info". | |
1986 | * @header: Lines containing ACL. | |
1987 | * | |
1988 | * Returns nothing. | |
1989 | */ | |
1990 | static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header) | |
1991 | { | |
1992 | char *buffer; | |
2ca9bf45 | 1993 | char *realpath = NULL; |
5b636857 | 1994 | char *argv0 = NULL; |
2ca9bf45 | 1995 | char *symlink = NULL; |
eadd99cc TH |
1996 | char *cp = strchr(header, '\n'); |
1997 | int len; | |
cdcf6723 | 1998 | |
eadd99cc TH |
1999 | if (!cp) |
2000 | return; | |
2001 | cp = strchr(cp + 1, '\n'); | |
2002 | if (!cp) | |
2003 | return; | |
2004 | *cp++ = '\0'; | |
2005 | len = strlen(cp) + 1; | |
2ca9bf45 TH |
2006 | /* strstr() will return NULL if ordering is wrong. */ |
2007 | if (*cp == 'f') { | |
5b636857 TH |
2008 | argv0 = strstr(header, " argv[]={ \""); |
2009 | if (argv0) { | |
2010 | argv0 += 10; | |
2011 | len += tomoyo_truncate(argv0) + 14; | |
2012 | } | |
2ca9bf45 TH |
2013 | realpath = strstr(header, " exec={ realpath=\""); |
2014 | if (realpath) { | |
2015 | realpath += 8; | |
2016 | len += tomoyo_truncate(realpath) + 6; | |
2017 | } | |
2018 | symlink = strstr(header, " symlink.target=\""); | |
2019 | if (symlink) | |
2020 | len += tomoyo_truncate(symlink + 1) + 1; | |
2021 | } | |
eadd99cc TH |
2022 | buffer = kmalloc(len, GFP_NOFS); |
2023 | if (!buffer) | |
2024 | return; | |
2025 | snprintf(buffer, len - 1, "%s", cp); | |
2ca9bf45 TH |
2026 | if (realpath) |
2027 | tomoyo_addprintf(buffer, len, " exec.%s", realpath); | |
5b636857 TH |
2028 | if (argv0) |
2029 | tomoyo_addprintf(buffer, len, " exec.argv[0]=%s", argv0); | |
2ca9bf45 TH |
2030 | if (symlink) |
2031 | tomoyo_addprintf(buffer, len, "%s", symlink); | |
eadd99cc | 2032 | tomoyo_normalize_line(buffer); |
b22b8b9f TH |
2033 | if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer, |
2034 | false)) | |
2035 | tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES); | |
eadd99cc TH |
2036 | kfree(buffer); |
2037 | } | |
2038 | ||
17fcfbd9 TH |
2039 | /** |
2040 | * tomoyo_supervisor - Ask for the supervisor's decision. | |
2041 | * | |
eadd99cc TH |
2042 | * @r: Pointer to "struct tomoyo_request_info". |
2043 | * @fmt: The printf()'s format string, followed by parameters. | |
17fcfbd9 TH |
2044 | * |
2045 | * Returns 0 if the supervisor decided to permit the access request which | |
2046 | * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the | |
2047 | * supervisor decided to retry the access request which violated the policy in | |
2048 | * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise. | |
2049 | */ | |
2050 | int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...) | |
2051 | { | |
2052 | va_list args; | |
eadd99cc | 2053 | int error; |
17fcfbd9 TH |
2054 | int len; |
2055 | static unsigned int tomoyo_serial; | |
eadd99cc | 2056 | struct tomoyo_query entry = { }; |
17fcfbd9 | 2057 | bool quota_exceeded = false; |
cdcf6723 | 2058 | |
eadd99cc TH |
2059 | va_start(args, fmt); |
2060 | len = vsnprintf((char *) &len, 1, fmt, args) + 1; | |
2061 | va_end(args); | |
2062 | /* Write /sys/kernel/security/tomoyo/audit. */ | |
2063 | va_start(args, fmt); | |
2064 | tomoyo_write_log2(r, len, fmt, args); | |
2065 | va_end(args); | |
2066 | /* Nothing more to do if granted. */ | |
2067 | if (r->granted) | |
2068 | return 0; | |
b22b8b9f TH |
2069 | if (r->mode) |
2070 | tomoyo_update_stat(r->mode); | |
17fcfbd9 | 2071 | switch (r->mode) { |
eadd99cc TH |
2072 | case TOMOYO_CONFIG_ENFORCING: |
2073 | error = -EPERM; | |
2074 | if (atomic_read(&tomoyo_query_observers)) | |
2075 | break; | |
2076 | goto out; | |
17fcfbd9 | 2077 | case TOMOYO_CONFIG_LEARNING: |
eadd99cc TH |
2078 | error = 0; |
2079 | /* Check max_learning_entry parameter. */ | |
2080 | if (tomoyo_domain_quota_is_ok(r)) | |
2081 | break; | |
df561f66 | 2082 | fallthrough; |
eadd99cc | 2083 | default: |
17fcfbd9 TH |
2084 | return 0; |
2085 | } | |
eadd99cc | 2086 | /* Get message. */ |
17fcfbd9 | 2087 | va_start(args, fmt); |
eadd99cc | 2088 | entry.query = tomoyo_init_log(r, len, fmt, args); |
17fcfbd9 | 2089 | va_end(args); |
eadd99cc | 2090 | if (!entry.query) |
17fcfbd9 | 2091 | goto out; |
eadd99cc TH |
2092 | entry.query_len = strlen(entry.query) + 1; |
2093 | if (!error) { | |
2094 | tomoyo_add_entry(r->domain, entry.query); | |
17fcfbd9 | 2095 | goto out; |
eadd99cc TH |
2096 | } |
2097 | len = tomoyo_round2(entry.query_len); | |
59df3166 | 2098 | entry.domain = r->domain; |
17fcfbd9 | 2099 | spin_lock(&tomoyo_query_list_lock); |
eadd99cc TH |
2100 | if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] && |
2101 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len | |
2102 | >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) { | |
17fcfbd9 TH |
2103 | quota_exceeded = true; |
2104 | } else { | |
eadd99cc TH |
2105 | entry.serial = tomoyo_serial++; |
2106 | entry.retry = r->retry; | |
2107 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len; | |
2108 | list_add_tail(&entry.list, &tomoyo_query_list); | |
17fcfbd9 TH |
2109 | } |
2110 | spin_unlock(&tomoyo_query_list_lock); | |
2111 | if (quota_exceeded) | |
2112 | goto out; | |
17fcfbd9 | 2113 | /* Give 10 seconds for supervisor's opinion. */ |
eadd99cc TH |
2114 | while (entry.timer < 10) { |
2115 | wake_up_all(&tomoyo_query_wait); | |
2116 | if (wait_event_interruptible_timeout | |
2117 | (tomoyo_answer_wait, entry.answer || | |
2118 | !atomic_read(&tomoyo_query_observers), HZ)) | |
17fcfbd9 | 2119 | break; |
cdcf6723 | 2120 | entry.timer++; |
17fcfbd9 TH |
2121 | } |
2122 | spin_lock(&tomoyo_query_list_lock); | |
eadd99cc TH |
2123 | list_del(&entry.list); |
2124 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len; | |
17fcfbd9 | 2125 | spin_unlock(&tomoyo_query_list_lock); |
eadd99cc | 2126 | switch (entry.answer) { |
17fcfbd9 TH |
2127 | case 3: /* Asked to retry by administrator. */ |
2128 | error = TOMOYO_RETRY_REQUEST; | |
2129 | r->retry++; | |
2130 | break; | |
2131 | case 1: | |
2132 | /* Granted by administrator. */ | |
2133 | error = 0; | |
2134 | break; | |
17fcfbd9 | 2135 | default: |
eadd99cc | 2136 | /* Timed out or rejected by administrator. */ |
17fcfbd9 TH |
2137 | break; |
2138 | } | |
eadd99cc TH |
2139 | out: |
2140 | kfree(entry.query); | |
17fcfbd9 TH |
2141 | return error; |
2142 | } | |
2143 | ||
59df3166 TH |
2144 | /** |
2145 | * tomoyo_find_domain_by_qid - Get domain by query id. | |
2146 | * | |
2147 | * @serial: Query ID assigned by tomoyo_supervisor(). | |
2148 | * | |
2149 | * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise. | |
2150 | */ | |
2151 | static struct tomoyo_domain_info *tomoyo_find_domain_by_qid | |
2152 | (unsigned int serial) | |
2153 | { | |
2154 | struct tomoyo_query *ptr; | |
2155 | struct tomoyo_domain_info *domain = NULL; | |
cdcf6723 | 2156 | |
59df3166 TH |
2157 | spin_lock(&tomoyo_query_list_lock); |
2158 | list_for_each_entry(ptr, &tomoyo_query_list, list) { | |
6041e834 | 2159 | if (ptr->serial != serial) |
59df3166 TH |
2160 | continue; |
2161 | domain = ptr->domain; | |
2162 | break; | |
2163 | } | |
2164 | spin_unlock(&tomoyo_query_list_lock); | |
2165 | return domain; | |
2166 | } | |
2167 | ||
17fcfbd9 TH |
2168 | /** |
2169 | * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query. | |
2170 | * | |
2171 | * @file: Pointer to "struct file". | |
2172 | * @wait: Pointer to "poll_table". | |
2173 | * | |
a9a08845 | 2174 | * Returns EPOLLIN | EPOLLRDNORM when ready to read, 0 otherwise. |
17fcfbd9 TH |
2175 | * |
2176 | * Waits for access requests which violated policy in enforcing mode. | |
2177 | */ | |
c0d4be28 | 2178 | static __poll_t tomoyo_poll_query(struct file *file, poll_table *wait) |
17fcfbd9 | 2179 | { |
6041e834 | 2180 | if (!list_empty(&tomoyo_query_list)) |
a9a08845 | 2181 | return EPOLLIN | EPOLLRDNORM; |
6041e834 TH |
2182 | poll_wait(file, &tomoyo_query_wait, wait); |
2183 | if (!list_empty(&tomoyo_query_list)) | |
a9a08845 | 2184 | return EPOLLIN | EPOLLRDNORM; |
17fcfbd9 TH |
2185 | return 0; |
2186 | } | |
2187 | ||
2188 | /** | |
2189 | * tomoyo_read_query - Read access requests which violated policy in enforcing mode. | |
2190 | * | |
2191 | * @head: Pointer to "struct tomoyo_io_buffer". | |
17fcfbd9 | 2192 | */ |
8fbe71f0 | 2193 | static void tomoyo_read_query(struct tomoyo_io_buffer *head) |
17fcfbd9 TH |
2194 | { |
2195 | struct list_head *tmp; | |
2c47ab93 TH |
2196 | unsigned int pos = 0; |
2197 | size_t len = 0; | |
17fcfbd9 | 2198 | char *buf; |
cdcf6723 | 2199 | |
f23571e8 | 2200 | if (head->r.w_pos) |
8fbe71f0 | 2201 | return; |
cdcf6723 TH |
2202 | kfree(head->read_buf); |
2203 | head->read_buf = NULL; | |
17fcfbd9 TH |
2204 | spin_lock(&tomoyo_query_list_lock); |
2205 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 2206 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
cdcf6723 | 2207 | |
f23571e8 | 2208 | if (pos++ != head->r.query_index) |
17fcfbd9 TH |
2209 | continue; |
2210 | len = ptr->query_len; | |
2211 | break; | |
2212 | } | |
2213 | spin_unlock(&tomoyo_query_list_lock); | |
2214 | if (!len) { | |
f23571e8 | 2215 | head->r.query_index = 0; |
8fbe71f0 | 2216 | return; |
17fcfbd9 | 2217 | } |
eadd99cc | 2218 | buf = kzalloc(len + 32, GFP_NOFS); |
17fcfbd9 | 2219 | if (!buf) |
8fbe71f0 | 2220 | return; |
17fcfbd9 TH |
2221 | pos = 0; |
2222 | spin_lock(&tomoyo_query_list_lock); | |
2223 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 2224 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
cdcf6723 | 2225 | |
f23571e8 | 2226 | if (pos++ != head->r.query_index) |
17fcfbd9 TH |
2227 | continue; |
2228 | /* | |
2229 | * Some query can be skipped because tomoyo_query_list | |
2230 | * can change, but I don't care. | |
2231 | */ | |
2232 | if (len == ptr->query_len) | |
eadd99cc TH |
2233 | snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial, |
2234 | ptr->retry, ptr->query); | |
17fcfbd9 TH |
2235 | break; |
2236 | } | |
2237 | spin_unlock(&tomoyo_query_list_lock); | |
2238 | if (buf[0]) { | |
17fcfbd9 | 2239 | head->read_buf = buf; |
f23571e8 TH |
2240 | head->r.w[head->r.w_pos++] = buf; |
2241 | head->r.query_index++; | |
17fcfbd9 TH |
2242 | } else { |
2243 | kfree(buf); | |
2244 | } | |
17fcfbd9 TH |
2245 | } |
2246 | ||
2247 | /** | |
2248 | * tomoyo_write_answer - Write the supervisor's decision. | |
2249 | * | |
2250 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2251 | * | |
2252 | * Returns 0 on success, -EINVAL otherwise. | |
2253 | */ | |
2254 | static int tomoyo_write_answer(struct tomoyo_io_buffer *head) | |
2255 | { | |
2256 | char *data = head->write_buf; | |
2257 | struct list_head *tmp; | |
2258 | unsigned int serial; | |
2259 | unsigned int answer; | |
cdcf6723 | 2260 | |
17fcfbd9 TH |
2261 | spin_lock(&tomoyo_query_list_lock); |
2262 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 2263 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
cdcf6723 | 2264 | |
17fcfbd9 TH |
2265 | ptr->timer = 0; |
2266 | } | |
2267 | spin_unlock(&tomoyo_query_list_lock); | |
2268 | if (sscanf(data, "A%u=%u", &serial, &answer) != 2) | |
2269 | return -EINVAL; | |
2270 | spin_lock(&tomoyo_query_list_lock); | |
2271 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 2272 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
cdcf6723 | 2273 | |
17fcfbd9 TH |
2274 | if (ptr->serial != serial) |
2275 | continue; | |
6041e834 TH |
2276 | ptr->answer = answer; |
2277 | /* Remove from tomoyo_query_list. */ | |
2278 | if (ptr->answer) | |
2279 | list_del_init(&ptr->list); | |
17fcfbd9 TH |
2280 | break; |
2281 | } | |
2282 | spin_unlock(&tomoyo_query_list_lock); | |
2283 | return 0; | |
2284 | } | |
2285 | ||
9590837b KT |
2286 | /** |
2287 | * tomoyo_read_version: Get version. | |
2288 | * | |
2289 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2290 | * | |
2291 | * Returns version information. | |
2292 | */ | |
8fbe71f0 | 2293 | static void tomoyo_read_version(struct tomoyo_io_buffer *head) |
9590837b | 2294 | { |
f23571e8 | 2295 | if (!head->r.eof) { |
861f4bcf | 2296 | tomoyo_io_printf(head, "2.6.0"); |
f23571e8 | 2297 | head->r.eof = true; |
9590837b | 2298 | } |
9590837b KT |
2299 | } |
2300 | ||
b22b8b9f TH |
2301 | /* String table for /sys/kernel/security/tomoyo/stat interface. */ |
2302 | static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = { | |
2303 | [TOMOYO_STAT_POLICY_UPDATES] = "update:", | |
2304 | [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:", | |
2305 | [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:", | |
2306 | [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:", | |
2307 | }; | |
2308 | ||
2309 | /* String table for /sys/kernel/security/tomoyo/stat interface. */ | |
2310 | static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = { | |
2311 | [TOMOYO_MEMORY_POLICY] = "policy:", | |
2312 | [TOMOYO_MEMORY_AUDIT] = "audit log:", | |
2313 | [TOMOYO_MEMORY_QUERY] = "query message:", | |
2314 | }; | |
2315 | ||
b22b8b9f | 2316 | /* Counter for number of updates. */ |
a8772fad TH |
2317 | static atomic_t tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT]; |
2318 | /* Timestamp counter for last updated. */ | |
92734092 | 2319 | static time64_t tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT]; |
b22b8b9f TH |
2320 | |
2321 | /** | |
2322 | * tomoyo_update_stat - Update statistic counters. | |
2323 | * | |
2324 | * @index: Index for policy type. | |
2325 | * | |
2326 | * Returns nothing. | |
2327 | */ | |
2328 | void tomoyo_update_stat(const u8 index) | |
2329 | { | |
a8772fad | 2330 | atomic_inc(&tomoyo_stat_updated[index]); |
92734092 | 2331 | tomoyo_stat_modified[index] = ktime_get_real_seconds(); |
b22b8b9f TH |
2332 | } |
2333 | ||
2334 | /** | |
2335 | * tomoyo_read_stat - Read statistic data. | |
2336 | * | |
2337 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2338 | * | |
2339 | * Returns nothing. | |
2340 | */ | |
2341 | static void tomoyo_read_stat(struct tomoyo_io_buffer *head) | |
2342 | { | |
2343 | u8 i; | |
2344 | unsigned int total = 0; | |
cdcf6723 | 2345 | |
b22b8b9f TH |
2346 | if (head->r.eof) |
2347 | return; | |
2348 | for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) { | |
2349 | tomoyo_io_printf(head, "Policy %-30s %10u", | |
2350 | tomoyo_policy_headers[i], | |
a8772fad | 2351 | atomic_read(&tomoyo_stat_updated[i])); |
b22b8b9f TH |
2352 | if (tomoyo_stat_modified[i]) { |
2353 | struct tomoyo_time stamp; | |
cdcf6723 | 2354 | |
b22b8b9f | 2355 | tomoyo_convert_time(tomoyo_stat_modified[i], &stamp); |
cdcf6723 | 2356 | tomoyo_io_printf(head, " (Last: %04u/%02u/%02u %02u:%02u:%02u)", |
b22b8b9f TH |
2357 | stamp.year, stamp.month, stamp.day, |
2358 | stamp.hour, stamp.min, stamp.sec); | |
2359 | } | |
2360 | tomoyo_set_lf(head); | |
2361 | } | |
2362 | for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) { | |
2363 | unsigned int used = tomoyo_memory_used[i]; | |
cdcf6723 | 2364 | |
b22b8b9f TH |
2365 | total += used; |
2366 | tomoyo_io_printf(head, "Memory used by %-22s %10u", | |
2367 | tomoyo_memory_headers[i], used); | |
2368 | used = tomoyo_memory_quota[i]; | |
2369 | if (used) | |
2370 | tomoyo_io_printf(head, " (Quota: %10u)", used); | |
2371 | tomoyo_set_lf(head); | |
2372 | } | |
2373 | tomoyo_io_printf(head, "Total memory used: %10u\n", | |
2374 | total); | |
2375 | head->r.eof = true; | |
2376 | } | |
2377 | ||
2378 | /** | |
2379 | * tomoyo_write_stat - Set memory quota. | |
2380 | * | |
2381 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2382 | * | |
2383 | * Returns 0. | |
2384 | */ | |
2385 | static int tomoyo_write_stat(struct tomoyo_io_buffer *head) | |
2386 | { | |
2387 | char *data = head->write_buf; | |
2388 | u8 i; | |
cdcf6723 | 2389 | |
b22b8b9f TH |
2390 | if (tomoyo_str_starts(&data, "Memory used by ")) |
2391 | for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) | |
2392 | if (tomoyo_str_starts(&data, tomoyo_memory_headers[i])) | |
2393 | sscanf(data, "%u", &tomoyo_memory_quota[i]); | |
2394 | return 0; | |
2395 | } | |
2396 | ||
9590837b KT |
2397 | /** |
2398 | * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface. | |
2399 | * | |
2400 | * @type: Type of interface. | |
2401 | * @file: Pointer to "struct file". | |
2402 | * | |
2e503bbb | 2403 | * Returns 0 on success, negative value otherwise. |
9590837b | 2404 | */ |
c3ef1500 | 2405 | int tomoyo_open_control(const u8 type, struct file *file) |
9590837b | 2406 | { |
4e5d6f7e | 2407 | struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS); |
9590837b KT |
2408 | |
2409 | if (!head) | |
2410 | return -ENOMEM; | |
2411 | mutex_init(&head->io_sem); | |
17fcfbd9 | 2412 | head->type = type; |
9590837b KT |
2413 | switch (type) { |
2414 | case TOMOYO_DOMAINPOLICY: | |
2415 | /* /sys/kernel/security/tomoyo/domain_policy */ | |
e2bf6907 TH |
2416 | head->write = tomoyo_write_domain; |
2417 | head->read = tomoyo_read_domain; | |
9590837b KT |
2418 | break; |
2419 | case TOMOYO_EXCEPTIONPOLICY: | |
2420 | /* /sys/kernel/security/tomoyo/exception_policy */ | |
e2bf6907 TH |
2421 | head->write = tomoyo_write_exception; |
2422 | head->read = tomoyo_read_exception; | |
9590837b | 2423 | break; |
eadd99cc TH |
2424 | case TOMOYO_AUDIT: |
2425 | /* /sys/kernel/security/tomoyo/audit */ | |
2426 | head->poll = tomoyo_poll_log; | |
2427 | head->read = tomoyo_read_log; | |
2428 | break; | |
9590837b KT |
2429 | case TOMOYO_PROCESS_STATUS: |
2430 | /* /sys/kernel/security/tomoyo/.process_status */ | |
2431 | head->write = tomoyo_write_pid; | |
2432 | head->read = tomoyo_read_pid; | |
2433 | break; | |
2434 | case TOMOYO_VERSION: | |
2435 | /* /sys/kernel/security/tomoyo/version */ | |
2436 | head->read = tomoyo_read_version; | |
2437 | head->readbuf_size = 128; | |
2438 | break; | |
b22b8b9f TH |
2439 | case TOMOYO_STAT: |
2440 | /* /sys/kernel/security/tomoyo/stat */ | |
2441 | head->write = tomoyo_write_stat; | |
2442 | head->read = tomoyo_read_stat; | |
2443 | head->readbuf_size = 1024; | |
9590837b KT |
2444 | break; |
2445 | case TOMOYO_PROFILE: | |
2446 | /* /sys/kernel/security/tomoyo/profile */ | |
2447 | head->write = tomoyo_write_profile; | |
2448 | head->read = tomoyo_read_profile; | |
2449 | break; | |
17fcfbd9 TH |
2450 | case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */ |
2451 | head->poll = tomoyo_poll_query; | |
2452 | head->write = tomoyo_write_answer; | |
2453 | head->read = tomoyo_read_query; | |
2454 | break; | |
9590837b KT |
2455 | case TOMOYO_MANAGER: |
2456 | /* /sys/kernel/security/tomoyo/manager */ | |
e2bf6907 TH |
2457 | head->write = tomoyo_write_manager; |
2458 | head->read = tomoyo_read_manager; | |
9590837b KT |
2459 | break; |
2460 | } | |
2461 | if (!(file->f_mode & FMODE_READ)) { | |
2462 | /* | |
2463 | * No need to allocate read_buf since it is not opened | |
2464 | * for reading. | |
2465 | */ | |
2466 | head->read = NULL; | |
17fcfbd9 TH |
2467 | head->poll = NULL; |
2468 | } else if (!head->poll) { | |
2469 | /* Don't allocate read_buf for poll() access. */ | |
9590837b KT |
2470 | if (!head->readbuf_size) |
2471 | head->readbuf_size = 4096 * 2; | |
4e5d6f7e | 2472 | head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS); |
9590837b | 2473 | if (!head->read_buf) { |
8e2d39a1 | 2474 | kfree(head); |
9590837b KT |
2475 | return -ENOMEM; |
2476 | } | |
2477 | } | |
2478 | if (!(file->f_mode & FMODE_WRITE)) { | |
2479 | /* | |
2480 | * No need to allocate write_buf since it is not opened | |
2481 | * for writing. | |
2482 | */ | |
2483 | head->write = NULL; | |
2484 | } else if (head->write) { | |
2485 | head->writebuf_size = 4096 * 2; | |
4e5d6f7e | 2486 | head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS); |
9590837b | 2487 | if (!head->write_buf) { |
8e2d39a1 TH |
2488 | kfree(head->read_buf); |
2489 | kfree(head); | |
9590837b KT |
2490 | return -ENOMEM; |
2491 | } | |
2492 | } | |
17fcfbd9 TH |
2493 | /* |
2494 | * If the file is /sys/kernel/security/tomoyo/query , increment the | |
2495 | * observer counter. | |
2496 | * The obserber counter is used by tomoyo_supervisor() to see if | |
2497 | * there is some process monitoring /sys/kernel/security/tomoyo/query. | |
2498 | */ | |
7c75964f | 2499 | if (type == TOMOYO_QUERY) |
17fcfbd9 | 2500 | atomic_inc(&tomoyo_query_observers); |
2e503bbb TH |
2501 | file->private_data = head; |
2502 | tomoyo_notify_gc(head, true); | |
9590837b KT |
2503 | return 0; |
2504 | } | |
2505 | ||
0849e3ba TH |
2506 | /** |
2507 | * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface. | |
2508 | * | |
2509 | * @file: Pointer to "struct file". | |
6041e834 | 2510 | * @wait: Pointer to "poll_table". Maybe NULL. |
0849e3ba | 2511 | * |
a9a08845 LT |
2512 | * Returns EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM if ready to read/write, |
2513 | * EPOLLOUT | EPOLLWRNORM otherwise. | |
0849e3ba | 2514 | */ |
c0d4be28 | 2515 | __poll_t tomoyo_poll_control(struct file *file, poll_table *wait) |
0849e3ba TH |
2516 | { |
2517 | struct tomoyo_io_buffer *head = file->private_data; | |
cdcf6723 | 2518 | |
6041e834 | 2519 | if (head->poll) |
a9a08845 LT |
2520 | return head->poll(file, wait) | EPOLLOUT | EPOLLWRNORM; |
2521 | return EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM; | |
0849e3ba TH |
2522 | } |
2523 | ||
bd03a3e4 TH |
2524 | /** |
2525 | * tomoyo_set_namespace_cursor - Set namespace to read. | |
2526 | * | |
2527 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2528 | * | |
2529 | * Returns nothing. | |
2530 | */ | |
2531 | static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head) | |
2532 | { | |
2533 | struct list_head *ns; | |
cdcf6723 | 2534 | |
bd03a3e4 TH |
2535 | if (head->type != TOMOYO_EXCEPTIONPOLICY && |
2536 | head->type != TOMOYO_PROFILE) | |
2537 | return; | |
2538 | /* | |
2539 | * If this is the first read, or reading previous namespace finished | |
2540 | * and has more namespaces to read, update the namespace cursor. | |
2541 | */ | |
2542 | ns = head->r.ns; | |
2543 | if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) { | |
2544 | /* Clearing is OK because tomoyo_flush() returned true. */ | |
2545 | memset(&head->r, 0, sizeof(head->r)); | |
2546 | head->r.ns = ns ? ns->next : tomoyo_namespace_list.next; | |
2547 | } | |
2548 | } | |
2549 | ||
2550 | /** | |
2551 | * tomoyo_has_more_namespace - Check for unread namespaces. | |
2552 | * | |
2553 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2554 | * | |
2555 | * Returns true if we have more entries to print, false otherwise. | |
2556 | */ | |
2557 | static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head) | |
2558 | { | |
2559 | return (head->type == TOMOYO_EXCEPTIONPOLICY || | |
2560 | head->type == TOMOYO_PROFILE) && head->r.eof && | |
2561 | head->r.ns->next != &tomoyo_namespace_list; | |
2562 | } | |
2563 | ||
9590837b KT |
2564 | /** |
2565 | * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface. | |
2566 | * | |
0df7e8b8 | 2567 | * @head: Pointer to "struct tomoyo_io_buffer". |
15269fb1 | 2568 | * @buffer: Pointer to buffer to write to. |
9590837b KT |
2569 | * @buffer_len: Size of @buffer. |
2570 | * | |
2571 | * Returns bytes read on success, negative value otherwise. | |
2572 | */ | |
2c47ab93 TH |
2573 | ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer, |
2574 | const int buffer_len) | |
9590837b | 2575 | { |
f23571e8 | 2576 | int len; |
2e503bbb | 2577 | int idx; |
9590837b KT |
2578 | |
2579 | if (!head->read) | |
cdcf6723 | 2580 | return -EINVAL; |
9590837b KT |
2581 | if (mutex_lock_interruptible(&head->io_sem)) |
2582 | return -EINTR; | |
f23571e8 TH |
2583 | head->read_user_buf = buffer; |
2584 | head->read_user_buf_avail = buffer_len; | |
2e503bbb | 2585 | idx = tomoyo_read_lock(); |
f23571e8 TH |
2586 | if (tomoyo_flush(head)) |
2587 | /* Call the policy handler. */ | |
bd03a3e4 TH |
2588 | do { |
2589 | tomoyo_set_namespace_cursor(head); | |
2590 | head->read(head); | |
2591 | } while (tomoyo_flush(head) && | |
2592 | tomoyo_has_more_namespace(head)); | |
2e503bbb | 2593 | tomoyo_read_unlock(idx); |
f23571e8 | 2594 | len = head->read_user_buf - buffer; |
9590837b KT |
2595 | mutex_unlock(&head->io_sem); |
2596 | return len; | |
2597 | } | |
2598 | ||
bd03a3e4 TH |
2599 | /** |
2600 | * tomoyo_parse_policy - Parse a policy line. | |
2601 | * | |
15269fb1 | 2602 | * @head: Pointer to "struct tomoyo_io_buffer". |
bd03a3e4 TH |
2603 | * @line: Line to parse. |
2604 | * | |
2605 | * Returns 0 on success, negative value otherwise. | |
2606 | * | |
2607 | * Caller holds tomoyo_read_lock(). | |
2608 | */ | |
2609 | static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line) | |
2610 | { | |
2611 | /* Delete request? */ | |
2612 | head->w.is_delete = !strncmp(line, "delete ", 7); | |
2613 | if (head->w.is_delete) | |
2614 | memmove(line, line + 7, strlen(line + 7) + 1); | |
2615 | /* Selecting namespace to update. */ | |
2616 | if (head->type == TOMOYO_EXCEPTIONPOLICY || | |
2617 | head->type == TOMOYO_PROFILE) { | |
2618 | if (*line == '<') { | |
2619 | char *cp = strchr(line, ' '); | |
cdcf6723 | 2620 | |
bd03a3e4 TH |
2621 | if (cp) { |
2622 | *cp++ = '\0'; | |
2623 | head->w.ns = tomoyo_assign_namespace(line); | |
2624 | memmove(line, cp, strlen(cp) + 1); | |
2625 | } else | |
2626 | head->w.ns = NULL; | |
2627 | } else | |
2628 | head->w.ns = &tomoyo_kernel_namespace; | |
2629 | /* Don't allow updating if namespace is invalid. */ | |
2630 | if (!head->w.ns) | |
2631 | return -ENOENT; | |
2632 | } | |
2633 | /* Do the update. */ | |
2634 | return head->write(head); | |
2635 | } | |
2636 | ||
9590837b KT |
2637 | /** |
2638 | * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface. | |
2639 | * | |
0df7e8b8 | 2640 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b KT |
2641 | * @buffer: Pointer to buffer to read from. |
2642 | * @buffer_len: Size of @buffer. | |
2643 | * | |
2644 | * Returns @buffer_len on success, negative value otherwise. | |
2645 | */ | |
2c47ab93 TH |
2646 | ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head, |
2647 | const char __user *buffer, const int buffer_len) | |
9590837b | 2648 | { |
9590837b | 2649 | int error = buffer_len; |
bd03a3e4 | 2650 | size_t avail_len = buffer_len; |
9590837b | 2651 | char *cp0 = head->write_buf; |
2e503bbb | 2652 | int idx; |
cdcf6723 | 2653 | |
9590837b | 2654 | if (!head->write) |
cdcf6723 | 2655 | return -EINVAL; |
9590837b KT |
2656 | if (mutex_lock_interruptible(&head->io_sem)) |
2657 | return -EINTR; | |
e0b057b4 | 2658 | head->read_user_buf_avail = 0; |
2e503bbb | 2659 | idx = tomoyo_read_lock(); |
9590837b KT |
2660 | /* Read a line and dispatch it to the policy handler. */ |
2661 | while (avail_len > 0) { | |
2662 | char c; | |
cdcf6723 | 2663 | |
0df7e8b8 | 2664 | if (head->w.avail >= head->writebuf_size - 1) { |
bd03a3e4 TH |
2665 | const int len = head->writebuf_size * 2; |
2666 | char *cp = kzalloc(len, GFP_NOFS); | |
cdcf6723 | 2667 | |
bd03a3e4 TH |
2668 | if (!cp) { |
2669 | error = -ENOMEM; | |
2670 | break; | |
2671 | } | |
2672 | memmove(cp, cp0, head->w.avail); | |
2673 | kfree(cp0); | |
2674 | head->write_buf = cp; | |
2675 | cp0 = cp; | |
2676 | head->writebuf_size = len; | |
2677 | } | |
2678 | if (get_user(c, buffer)) { | |
9590837b KT |
2679 | error = -EFAULT; |
2680 | break; | |
2681 | } | |
2682 | buffer++; | |
2683 | avail_len--; | |
0df7e8b8 | 2684 | cp0[head->w.avail++] = c; |
9590837b KT |
2685 | if (c != '\n') |
2686 | continue; | |
0df7e8b8 TH |
2687 | cp0[head->w.avail - 1] = '\0'; |
2688 | head->w.avail = 0; | |
9590837b | 2689 | tomoyo_normalize_line(cp0); |
bd03a3e4 TH |
2690 | if (!strcmp(cp0, "reset")) { |
2691 | head->w.ns = &tomoyo_kernel_namespace; | |
2692 | head->w.domain = NULL; | |
2693 | memset(&head->r, 0, sizeof(head->r)); | |
2694 | continue; | |
2695 | } | |
2696 | /* Don't allow updating policies by non manager programs. */ | |
2697 | switch (head->type) { | |
2698 | case TOMOYO_PROCESS_STATUS: | |
2699 | /* This does not write anything. */ | |
2700 | break; | |
2701 | case TOMOYO_DOMAINPOLICY: | |
2702 | if (tomoyo_select_domain(head, cp0)) | |
2703 | continue; | |
df561f66 | 2704 | fallthrough; |
bd03a3e4 TH |
2705 | case TOMOYO_EXCEPTIONPOLICY: |
2706 | if (!strcmp(cp0, "select transition_only")) { | |
2707 | head->r.print_transition_related_only = true; | |
2708 | continue; | |
2709 | } | |
df561f66 | 2710 | fallthrough; |
bd03a3e4 TH |
2711 | default: |
2712 | if (!tomoyo_manager()) { | |
2713 | error = -EPERM; | |
2714 | goto out; | |
2715 | } | |
2716 | } | |
2717 | switch (tomoyo_parse_policy(head, cp0)) { | |
2718 | case -EPERM: | |
2719 | error = -EPERM; | |
2720 | goto out; | |
b22b8b9f TH |
2721 | case 0: |
2722 | switch (head->type) { | |
2723 | case TOMOYO_DOMAINPOLICY: | |
2724 | case TOMOYO_EXCEPTIONPOLICY: | |
b22b8b9f TH |
2725 | case TOMOYO_STAT: |
2726 | case TOMOYO_PROFILE: | |
2727 | case TOMOYO_MANAGER: | |
2728 | tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES); | |
2729 | break; | |
2730 | default: | |
2731 | break; | |
2732 | } | |
2733 | break; | |
bd03a3e4 | 2734 | } |
9590837b | 2735 | } |
bd03a3e4 | 2736 | out: |
2e503bbb | 2737 | tomoyo_read_unlock(idx); |
9590837b KT |
2738 | mutex_unlock(&head->io_sem); |
2739 | return error; | |
2740 | } | |
2741 | ||
2742 | /** | |
2743 | * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface. | |
2744 | * | |
0df7e8b8 | 2745 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b | 2746 | */ |
e53cfda5 | 2747 | void tomoyo_close_control(struct tomoyo_io_buffer *head) |
9590837b | 2748 | { |
17fcfbd9 TH |
2749 | /* |
2750 | * If the file is /sys/kernel/security/tomoyo/query , decrement the | |
2751 | * observer counter. | |
2752 | */ | |
2e503bbb TH |
2753 | if (head->type == TOMOYO_QUERY && |
2754 | atomic_dec_and_test(&tomoyo_query_observers)) | |
2755 | wake_up_all(&tomoyo_answer_wait); | |
2756 | tomoyo_notify_gc(head, false); | |
9590837b KT |
2757 | } |
2758 | ||
9590837b | 2759 | /** |
c3ef1500 | 2760 | * tomoyo_check_profile - Check all profiles currently assigned to domains are defined. |
9590837b | 2761 | */ |
c3ef1500 | 2762 | void tomoyo_check_profile(void) |
9590837b | 2763 | { |
c3ef1500 TH |
2764 | struct tomoyo_domain_info *domain; |
2765 | const int idx = tomoyo_read_lock(); | |
cdcf6723 | 2766 | |
c3ef1500 | 2767 | tomoyo_policy_loaded = true; |
861f4bcf | 2768 | pr_info("TOMOYO: 2.6.0\n"); |
6bd5ce60 TH |
2769 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list, |
2770 | srcu_read_lock_held(&tomoyo_ss)) { | |
c3ef1500 | 2771 | const u8 profile = domain->profile; |
861f4bcf | 2772 | struct tomoyo_policy_namespace *ns = domain->ns; |
cdcf6723 | 2773 | |
861f4bcf TH |
2774 | if (ns->profile_version == 20110903) { |
2775 | pr_info_once("Converting profile version from %u to %u.\n", | |
2776 | 20110903, 20150505); | |
2777 | ns->profile_version = 20150505; | |
2778 | } | |
2779 | if (ns->profile_version != 20150505) | |
cdcf6723 | 2780 | pr_err("Profile version %u is not supported.\n", |
bd03a3e4 TH |
2781 | ns->profile_version); |
2782 | else if (!ns->profile_ptr[profile]) | |
cdcf6723 | 2783 | pr_err("Profile %u (used by '%s') is not defined.\n", |
bd03a3e4 TH |
2784 | profile, domain->domainname->name); |
2785 | else | |
c3ef1500 | 2786 | continue; |
861f4bcf TH |
2787 | pr_err("Userland tools for TOMOYO 2.6 must be installed and policy must be initialized.\n"); |
2788 | pr_err("Please see https://tomoyo.osdn.jp/2.6/ for more information.\n"); | |
bd03a3e4 | 2789 | panic("STOP!"); |
c3ef1500 TH |
2790 | } |
2791 | tomoyo_read_unlock(idx); | |
cdcf6723 | 2792 | pr_info("Mandatory Access Control activated.\n"); |
9590837b | 2793 | } |
efe836ab TH |
2794 | |
2795 | /** | |
2796 | * tomoyo_load_builtin_policy - Load built-in policy. | |
2797 | * | |
2798 | * Returns nothing. | |
2799 | */ | |
2800 | void __init tomoyo_load_builtin_policy(void) | |
2801 | { | |
e80b1859 TH |
2802 | #ifdef CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING |
2803 | static char tomoyo_builtin_profile[] __initdata = | |
2804 | "PROFILE_VERSION=20150505\n" | |
2805 | "0-CONFIG={ mode=learning grant_log=no reject_log=yes }\n"; | |
2806 | static char tomoyo_builtin_exception_policy[] __initdata = | |
2807 | "aggregator proc:/self/exe /proc/self/exe\n"; | |
2808 | static char tomoyo_builtin_domain_policy[] __initdata = ""; | |
2809 | static char tomoyo_builtin_manager[] __initdata = ""; | |
2810 | static char tomoyo_builtin_stat[] __initdata = ""; | |
2811 | #else | |
efe836ab TH |
2812 | /* |
2813 | * This include file is manually created and contains built-in policy | |
2814 | * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy", | |
2815 | * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager", | |
2816 | * "tomoyo_builtin_stat" in the form of "static char [] __initdata". | |
2817 | */ | |
2818 | #include "builtin-policy.h" | |
e80b1859 | 2819 | #endif |
efe836ab TH |
2820 | u8 i; |
2821 | const int idx = tomoyo_read_lock(); | |
cdcf6723 | 2822 | |
efe836ab TH |
2823 | for (i = 0; i < 5; i++) { |
2824 | struct tomoyo_io_buffer head = { }; | |
2825 | char *start = ""; | |
cdcf6723 | 2826 | |
efe836ab TH |
2827 | switch (i) { |
2828 | case 0: | |
2829 | start = tomoyo_builtin_profile; | |
2830 | head.type = TOMOYO_PROFILE; | |
2831 | head.write = tomoyo_write_profile; | |
2832 | break; | |
2833 | case 1: | |
2834 | start = tomoyo_builtin_exception_policy; | |
2835 | head.type = TOMOYO_EXCEPTIONPOLICY; | |
2836 | head.write = tomoyo_write_exception; | |
2837 | break; | |
2838 | case 2: | |
2839 | start = tomoyo_builtin_domain_policy; | |
2840 | head.type = TOMOYO_DOMAINPOLICY; | |
2841 | head.write = tomoyo_write_domain; | |
2842 | break; | |
2843 | case 3: | |
2844 | start = tomoyo_builtin_manager; | |
2845 | head.type = TOMOYO_MANAGER; | |
2846 | head.write = tomoyo_write_manager; | |
2847 | break; | |
2848 | case 4: | |
2849 | start = tomoyo_builtin_stat; | |
2850 | head.type = TOMOYO_STAT; | |
2851 | head.write = tomoyo_write_stat; | |
2852 | break; | |
2853 | } | |
2854 | while (1) { | |
2855 | char *end = strchr(start, '\n'); | |
cdcf6723 | 2856 | |
efe836ab TH |
2857 | if (!end) |
2858 | break; | |
2859 | *end = '\0'; | |
2860 | tomoyo_normalize_line(start); | |
2861 | head.write_buf = start; | |
2862 | tomoyo_parse_policy(&head, start); | |
2863 | start = end + 1; | |
2864 | } | |
2865 | } | |
2866 | tomoyo_read_unlock(idx); | |
0e4ae0e0 TH |
2867 | #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER |
2868 | tomoyo_check_profile(); | |
2869 | #endif | |
efe836ab | 2870 | } |