Commit | Line | Data |
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9590837b KT |
1 | /* |
2 | * security/tomoyo/common.c | |
3 | * | |
0f2a55d5 | 4 | * Copyright (C) 2005-2011 NTT DATA CORPORATION |
9590837b KT |
5 | */ |
6 | ||
7 | #include <linux/uaccess.h> | |
5a0e3ad6 | 8 | #include <linux/slab.h> |
9590837b | 9 | #include <linux/security.h> |
9590837b | 10 | #include "common.h" |
9590837b | 11 | |
eadd99cc TH |
12 | /* String table for operation mode. */ |
13 | const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = { | |
14 | [TOMOYO_CONFIG_DISABLED] = "disabled", | |
15 | [TOMOYO_CONFIG_LEARNING] = "learning", | |
16 | [TOMOYO_CONFIG_PERMISSIVE] = "permissive", | |
17 | [TOMOYO_CONFIG_ENFORCING] = "enforcing" | |
9590837b | 18 | }; |
9590837b | 19 | |
57c2590f | 20 | /* String table for /sys/kernel/security/tomoyo/profile */ |
2c47ab93 | 21 | const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX |
57c2590f | 22 | + TOMOYO_MAX_MAC_CATEGORY_INDEX] = { |
d58e0da8 | 23 | /* CONFIG::file group */ |
2c47ab93 TH |
24 | [TOMOYO_MAC_FILE_EXECUTE] = "execute", |
25 | [TOMOYO_MAC_FILE_OPEN] = "open", | |
26 | [TOMOYO_MAC_FILE_CREATE] = "create", | |
27 | [TOMOYO_MAC_FILE_UNLINK] = "unlink", | |
28 | [TOMOYO_MAC_FILE_GETATTR] = "getattr", | |
29 | [TOMOYO_MAC_FILE_MKDIR] = "mkdir", | |
30 | [TOMOYO_MAC_FILE_RMDIR] = "rmdir", | |
31 | [TOMOYO_MAC_FILE_MKFIFO] = "mkfifo", | |
32 | [TOMOYO_MAC_FILE_MKSOCK] = "mksock", | |
33 | [TOMOYO_MAC_FILE_TRUNCATE] = "truncate", | |
34 | [TOMOYO_MAC_FILE_SYMLINK] = "symlink", | |
35 | [TOMOYO_MAC_FILE_MKBLOCK] = "mkblock", | |
36 | [TOMOYO_MAC_FILE_MKCHAR] = "mkchar", | |
37 | [TOMOYO_MAC_FILE_LINK] = "link", | |
38 | [TOMOYO_MAC_FILE_RENAME] = "rename", | |
39 | [TOMOYO_MAC_FILE_CHMOD] = "chmod", | |
40 | [TOMOYO_MAC_FILE_CHOWN] = "chown", | |
41 | [TOMOYO_MAC_FILE_CHGRP] = "chgrp", | |
42 | [TOMOYO_MAC_FILE_IOCTL] = "ioctl", | |
43 | [TOMOYO_MAC_FILE_CHROOT] = "chroot", | |
44 | [TOMOYO_MAC_FILE_MOUNT] = "mount", | |
45 | [TOMOYO_MAC_FILE_UMOUNT] = "unmount", | |
46 | [TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root", | |
059d84db TH |
47 | /* CONFIG::network group */ |
48 | [TOMOYO_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind", | |
49 | [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen", | |
50 | [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect", | |
51 | [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind", | |
52 | [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send", | |
53 | [TOMOYO_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind", | |
54 | [TOMOYO_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send", | |
55 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind", | |
56 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen", | |
57 | [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect", | |
58 | [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind", | |
59 | [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send", | |
60 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind", | |
61 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen", | |
62 | [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect", | |
d58e0da8 TH |
63 | /* CONFIG::misc group */ |
64 | [TOMOYO_MAC_ENVIRON] = "env", | |
65 | /* CONFIG group */ | |
57c2590f | 66 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file", |
059d84db | 67 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_NETWORK] = "network", |
d58e0da8 | 68 | [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_MISC] = "misc", |
9590837b KT |
69 | }; |
70 | ||
2066a361 TH |
71 | /* String table for conditions. */ |
72 | const char * const tomoyo_condition_keyword[TOMOYO_MAX_CONDITION_KEYWORD] = { | |
73 | [TOMOYO_TASK_UID] = "task.uid", | |
74 | [TOMOYO_TASK_EUID] = "task.euid", | |
75 | [TOMOYO_TASK_SUID] = "task.suid", | |
76 | [TOMOYO_TASK_FSUID] = "task.fsuid", | |
77 | [TOMOYO_TASK_GID] = "task.gid", | |
78 | [TOMOYO_TASK_EGID] = "task.egid", | |
79 | [TOMOYO_TASK_SGID] = "task.sgid", | |
80 | [TOMOYO_TASK_FSGID] = "task.fsgid", | |
81 | [TOMOYO_TASK_PID] = "task.pid", | |
82 | [TOMOYO_TASK_PPID] = "task.ppid", | |
5b636857 TH |
83 | [TOMOYO_EXEC_ARGC] = "exec.argc", |
84 | [TOMOYO_EXEC_ENVC] = "exec.envc", | |
8761afd4 TH |
85 | [TOMOYO_TYPE_IS_SOCKET] = "socket", |
86 | [TOMOYO_TYPE_IS_SYMLINK] = "symlink", | |
87 | [TOMOYO_TYPE_IS_FILE] = "file", | |
88 | [TOMOYO_TYPE_IS_BLOCK_DEV] = "block", | |
89 | [TOMOYO_TYPE_IS_DIRECTORY] = "directory", | |
90 | [TOMOYO_TYPE_IS_CHAR_DEV] = "char", | |
91 | [TOMOYO_TYPE_IS_FIFO] = "fifo", | |
92 | [TOMOYO_MODE_SETUID] = "setuid", | |
93 | [TOMOYO_MODE_SETGID] = "setgid", | |
94 | [TOMOYO_MODE_STICKY] = "sticky", | |
95 | [TOMOYO_MODE_OWNER_READ] = "owner_read", | |
96 | [TOMOYO_MODE_OWNER_WRITE] = "owner_write", | |
97 | [TOMOYO_MODE_OWNER_EXECUTE] = "owner_execute", | |
98 | [TOMOYO_MODE_GROUP_READ] = "group_read", | |
99 | [TOMOYO_MODE_GROUP_WRITE] = "group_write", | |
100 | [TOMOYO_MODE_GROUP_EXECUTE] = "group_execute", | |
101 | [TOMOYO_MODE_OTHERS_READ] = "others_read", | |
102 | [TOMOYO_MODE_OTHERS_WRITE] = "others_write", | |
103 | [TOMOYO_MODE_OTHERS_EXECUTE] = "others_execute", | |
2ca9bf45 TH |
104 | [TOMOYO_EXEC_REALPATH] = "exec.realpath", |
105 | [TOMOYO_SYMLINK_TARGET] = "symlink.target", | |
8761afd4 TH |
106 | [TOMOYO_PATH1_UID] = "path1.uid", |
107 | [TOMOYO_PATH1_GID] = "path1.gid", | |
108 | [TOMOYO_PATH1_INO] = "path1.ino", | |
109 | [TOMOYO_PATH1_MAJOR] = "path1.major", | |
110 | [TOMOYO_PATH1_MINOR] = "path1.minor", | |
111 | [TOMOYO_PATH1_PERM] = "path1.perm", | |
112 | [TOMOYO_PATH1_TYPE] = "path1.type", | |
113 | [TOMOYO_PATH1_DEV_MAJOR] = "path1.dev_major", | |
114 | [TOMOYO_PATH1_DEV_MINOR] = "path1.dev_minor", | |
115 | [TOMOYO_PATH2_UID] = "path2.uid", | |
116 | [TOMOYO_PATH2_GID] = "path2.gid", | |
117 | [TOMOYO_PATH2_INO] = "path2.ino", | |
118 | [TOMOYO_PATH2_MAJOR] = "path2.major", | |
119 | [TOMOYO_PATH2_MINOR] = "path2.minor", | |
120 | [TOMOYO_PATH2_PERM] = "path2.perm", | |
121 | [TOMOYO_PATH2_TYPE] = "path2.type", | |
122 | [TOMOYO_PATH2_DEV_MAJOR] = "path2.dev_major", | |
123 | [TOMOYO_PATH2_DEV_MINOR] = "path2.dev_minor", | |
124 | [TOMOYO_PATH1_PARENT_UID] = "path1.parent.uid", | |
125 | [TOMOYO_PATH1_PARENT_GID] = "path1.parent.gid", | |
126 | [TOMOYO_PATH1_PARENT_INO] = "path1.parent.ino", | |
127 | [TOMOYO_PATH1_PARENT_PERM] = "path1.parent.perm", | |
128 | [TOMOYO_PATH2_PARENT_UID] = "path2.parent.uid", | |
129 | [TOMOYO_PATH2_PARENT_GID] = "path2.parent.gid", | |
130 | [TOMOYO_PATH2_PARENT_INO] = "path2.parent.ino", | |
131 | [TOMOYO_PATH2_PARENT_PERM] = "path2.parent.perm", | |
2066a361 TH |
132 | }; |
133 | ||
d5ca1725 TH |
134 | /* String table for PREFERENCE keyword. */ |
135 | static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = { | |
eadd99cc | 136 | [TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log", |
d5ca1725 TH |
137 | [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry", |
138 | }; | |
139 | ||
2c47ab93 TH |
140 | /* String table for path operation. */ |
141 | const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = { | |
142 | [TOMOYO_TYPE_EXECUTE] = "execute", | |
143 | [TOMOYO_TYPE_READ] = "read", | |
144 | [TOMOYO_TYPE_WRITE] = "write", | |
145 | [TOMOYO_TYPE_APPEND] = "append", | |
146 | [TOMOYO_TYPE_UNLINK] = "unlink", | |
147 | [TOMOYO_TYPE_GETATTR] = "getattr", | |
148 | [TOMOYO_TYPE_RMDIR] = "rmdir", | |
149 | [TOMOYO_TYPE_TRUNCATE] = "truncate", | |
150 | [TOMOYO_TYPE_SYMLINK] = "symlink", | |
151 | [TOMOYO_TYPE_CHROOT] = "chroot", | |
152 | [TOMOYO_TYPE_UMOUNT] = "unmount", | |
153 | }; | |
154 | ||
059d84db TH |
155 | /* String table for socket's operation. */ |
156 | const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION] = { | |
157 | [TOMOYO_NETWORK_BIND] = "bind", | |
158 | [TOMOYO_NETWORK_LISTEN] = "listen", | |
159 | [TOMOYO_NETWORK_CONNECT] = "connect", | |
160 | [TOMOYO_NETWORK_SEND] = "send", | |
161 | }; | |
162 | ||
2c47ab93 TH |
163 | /* String table for categories. */ |
164 | static const char * const tomoyo_category_keywords | |
165 | [TOMOYO_MAX_MAC_CATEGORY_INDEX] = { | |
059d84db TH |
166 | [TOMOYO_MAC_CATEGORY_FILE] = "file", |
167 | [TOMOYO_MAC_CATEGORY_NETWORK] = "network", | |
168 | [TOMOYO_MAC_CATEGORY_MISC] = "misc", | |
2c47ab93 TH |
169 | }; |
170 | ||
9590837b KT |
171 | /* Permit policy management by non-root user? */ |
172 | static bool tomoyo_manage_by_non_root; | |
173 | ||
174 | /* Utility functions. */ | |
175 | ||
57c2590f TH |
176 | /** |
177 | * tomoyo_yesno - Return "yes" or "no". | |
178 | * | |
179 | * @value: Bool value. | |
180 | */ | |
eadd99cc | 181 | const char *tomoyo_yesno(const unsigned int value) |
57c2590f TH |
182 | { |
183 | return value ? "yes" : "no"; | |
184 | } | |
185 | ||
d5ca1725 TH |
186 | /** |
187 | * tomoyo_addprintf - strncat()-like-snprintf(). | |
188 | * | |
189 | * @buffer: Buffer to write to. Must be '\0'-terminated. | |
190 | * @len: Size of @buffer. | |
191 | * @fmt: The printf()'s format string, followed by parameters. | |
192 | * | |
193 | * Returns nothing. | |
194 | */ | |
f23571e8 TH |
195 | static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...) |
196 | { | |
197 | va_list args; | |
198 | const int pos = strlen(buffer); | |
199 | va_start(args, fmt); | |
200 | vsnprintf(buffer + pos, len - pos - 1, fmt, args); | |
201 | va_end(args); | |
202 | } | |
203 | ||
7762fbff | 204 | /** |
f23571e8 | 205 | * tomoyo_flush - Flush queued string to userspace's buffer. |
7762fbff | 206 | * |
f23571e8 | 207 | * @head: Pointer to "struct tomoyo_io_buffer". |
7762fbff | 208 | * |
f23571e8 | 209 | * Returns true if all data was flushed, false otherwise. |
7762fbff | 210 | */ |
f23571e8 | 211 | static bool tomoyo_flush(struct tomoyo_io_buffer *head) |
7762fbff | 212 | { |
f23571e8 TH |
213 | while (head->r.w_pos) { |
214 | const char *w = head->r.w[0]; | |
2c47ab93 | 215 | size_t len = strlen(w); |
f23571e8 TH |
216 | if (len) { |
217 | if (len > head->read_user_buf_avail) | |
218 | len = head->read_user_buf_avail; | |
219 | if (!len) | |
220 | return false; | |
221 | if (copy_to_user(head->read_user_buf, w, len)) | |
222 | return false; | |
223 | head->read_user_buf_avail -= len; | |
224 | head->read_user_buf += len; | |
225 | w += len; | |
226 | } | |
c0fa797a TH |
227 | head->r.w[0] = w; |
228 | if (*w) | |
f23571e8 | 229 | return false; |
eadd99cc | 230 | /* Add '\0' for audit logs and query. */ |
f23571e8 TH |
231 | if (head->poll) { |
232 | if (!head->read_user_buf_avail || | |
233 | copy_to_user(head->read_user_buf, "", 1)) | |
234 | return false; | |
235 | head->read_user_buf_avail--; | |
236 | head->read_user_buf++; | |
237 | } | |
238 | head->r.w_pos--; | |
239 | for (len = 0; len < head->r.w_pos; len++) | |
240 | head->r.w[len] = head->r.w[len + 1]; | |
241 | } | |
242 | head->r.avail = 0; | |
243 | return true; | |
7762fbff TH |
244 | } |
245 | ||
4c3e9e2d | 246 | /** |
f23571e8 | 247 | * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure. |
4c3e9e2d | 248 | * |
f23571e8 TH |
249 | * @head: Pointer to "struct tomoyo_io_buffer". |
250 | * @string: String to print. | |
4c3e9e2d | 251 | * |
f23571e8 TH |
252 | * Note that @string has to be kept valid until @head is kfree()d. |
253 | * This means that char[] allocated on stack memory cannot be passed to | |
254 | * this function. Use tomoyo_io_printf() for char[] allocated on stack memory. | |
4c3e9e2d | 255 | */ |
f23571e8 | 256 | static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string) |
4c3e9e2d | 257 | { |
f23571e8 TH |
258 | if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) { |
259 | head->r.w[head->r.w_pos++] = string; | |
260 | tomoyo_flush(head); | |
261 | } else | |
262 | WARN_ON(1); | |
4c3e9e2d TH |
263 | } |
264 | ||
9590837b | 265 | /** |
f23571e8 | 266 | * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure. |
9590837b KT |
267 | * |
268 | * @head: Pointer to "struct tomoyo_io_buffer". | |
269 | * @fmt: The printf()'s format string, followed by parameters. | |
9590837b | 270 | */ |
f23571e8 | 271 | void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...) |
9590837b KT |
272 | { |
273 | va_list args; | |
2c47ab93 TH |
274 | size_t len; |
275 | size_t pos = head->r.avail; | |
9590837b | 276 | int size = head->readbuf_size - pos; |
9590837b | 277 | if (size <= 0) |
f23571e8 | 278 | return; |
9590837b | 279 | va_start(args, fmt); |
f23571e8 | 280 | len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1; |
9590837b | 281 | va_end(args); |
f23571e8 TH |
282 | if (pos + len >= head->readbuf_size) { |
283 | WARN_ON(1); | |
284 | return; | |
285 | } | |
286 | head->r.avail += len; | |
287 | tomoyo_set_string(head, head->read_buf + pos); | |
288 | } | |
289 | ||
0d2171d7 TH |
290 | /** |
291 | * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure. | |
292 | * | |
293 | * @head: Pointer to "struct tomoyo_io_buffer". | |
294 | * | |
295 | * Returns nothing. | |
296 | */ | |
f23571e8 TH |
297 | static void tomoyo_set_space(struct tomoyo_io_buffer *head) |
298 | { | |
299 | tomoyo_set_string(head, " "); | |
300 | } | |
301 | ||
0d2171d7 TH |
302 | /** |
303 | * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure. | |
304 | * | |
305 | * @head: Pointer to "struct tomoyo_io_buffer". | |
306 | * | |
307 | * Returns nothing. | |
308 | */ | |
f23571e8 TH |
309 | static bool tomoyo_set_lf(struct tomoyo_io_buffer *head) |
310 | { | |
311 | tomoyo_set_string(head, "\n"); | |
312 | return !head->r.w_pos; | |
313 | } | |
314 | ||
0d2171d7 TH |
315 | /** |
316 | * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure. | |
317 | * | |
318 | * @head: Pointer to "struct tomoyo_io_buffer". | |
319 | * | |
320 | * Returns nothing. | |
321 | */ | |
322 | static void tomoyo_set_slash(struct tomoyo_io_buffer *head) | |
323 | { | |
324 | tomoyo_set_string(head, "/"); | |
325 | } | |
326 | ||
bd03a3e4 TH |
327 | /* List of namespaces. */ |
328 | LIST_HEAD(tomoyo_namespace_list); | |
329 | /* True if namespace other than tomoyo_kernel_namespace is defined. */ | |
330 | static bool tomoyo_namespace_enabled; | |
331 | ||
332 | /** | |
333 | * tomoyo_init_policy_namespace - Initialize namespace. | |
334 | * | |
335 | * @ns: Pointer to "struct tomoyo_policy_namespace". | |
336 | * | |
337 | * Returns nothing. | |
338 | */ | |
339 | void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns) | |
340 | { | |
341 | unsigned int idx; | |
342 | 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]); | |
348 | ns->profile_version = 20100903; | |
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 TH |
430 | char buffer[128]; |
431 | buffer[0] = '\0'; | |
432 | for (i = 0; i < 2; i++) { | |
433 | switch (min_type) { | |
434 | case TOMOYO_VALUE_TYPE_HEXADECIMAL: | |
435 | tomoyo_addprintf(buffer, sizeof(buffer), | |
436 | "0x%lX", min); | |
437 | break; | |
438 | case TOMOYO_VALUE_TYPE_OCTAL: | |
439 | tomoyo_addprintf(buffer, sizeof(buffer), | |
440 | "0%lo", min); | |
441 | break; | |
442 | default: | |
2066a361 TH |
443 | tomoyo_addprintf(buffer, sizeof(buffer), "%lu", |
444 | min); | |
f23571e8 TH |
445 | break; |
446 | } | |
447 | if (min == max && min_type == max_type) | |
448 | break; | |
449 | tomoyo_addprintf(buffer, sizeof(buffer), "-"); | |
450 | min_type = max_type; | |
451 | min = max; | |
452 | } | |
453 | tomoyo_io_printf(head, "%s", buffer); | |
454 | } | |
9590837b KT |
455 | } |
456 | ||
2066a361 TH |
457 | /** |
458 | * tomoyo_print_number_union - Print a tomoyo_number_union. | |
459 | * | |
460 | * @head: Pointer to "struct tomoyo_io_buffer". | |
461 | * @ptr: Pointer to "struct tomoyo_number_union". | |
462 | * | |
463 | * Returns nothing. | |
464 | */ | |
465 | static void tomoyo_print_number_union(struct tomoyo_io_buffer *head, | |
466 | const struct tomoyo_number_union *ptr) | |
467 | { | |
468 | tomoyo_set_space(head); | |
469 | tomoyo_print_number_union_nospace(head, ptr); | |
470 | } | |
471 | ||
9590837b | 472 | /** |
e2bf6907 | 473 | * tomoyo_assign_profile - Create a new profile. |
9590837b | 474 | * |
bd03a3e4 | 475 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
9590837b KT |
476 | * @profile: Profile number to create. |
477 | * | |
478 | * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise. | |
479 | */ | |
bd03a3e4 TH |
480 | static struct tomoyo_profile *tomoyo_assign_profile |
481 | (struct tomoyo_policy_namespace *ns, const unsigned int profile) | |
9590837b | 482 | { |
57c2590f TH |
483 | struct tomoyo_profile *ptr; |
484 | struct tomoyo_profile *entry; | |
9590837b KT |
485 | if (profile >= TOMOYO_MAX_PROFILES) |
486 | return NULL; | |
bd03a3e4 | 487 | ptr = ns->profile_ptr[profile]; |
9590837b | 488 | if (ptr) |
57c2590f TH |
489 | return ptr; |
490 | entry = kzalloc(sizeof(*entry), GFP_NOFS); | |
491 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) | |
492 | goto out; | |
bd03a3e4 | 493 | ptr = ns->profile_ptr[profile]; |
57c2590f TH |
494 | if (!ptr && tomoyo_memory_ok(entry)) { |
495 | ptr = entry; | |
eadd99cc TH |
496 | ptr->default_config = TOMOYO_CONFIG_DISABLED | |
497 | TOMOYO_CONFIG_WANT_GRANT_LOG | | |
498 | TOMOYO_CONFIG_WANT_REJECT_LOG; | |
57c2590f TH |
499 | memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT, |
500 | sizeof(ptr->config)); | |
eadd99cc | 501 | ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] = 1024; |
d5ca1725 | 502 | ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] = 2048; |
57c2590f | 503 | mb(); /* Avoid out-of-order execution. */ |
bd03a3e4 | 504 | ns->profile_ptr[profile] = ptr; |
57c2590f | 505 | entry = NULL; |
cd7bec6a | 506 | } |
29282381 | 507 | mutex_unlock(&tomoyo_policy_lock); |
57c2590f TH |
508 | out: |
509 | kfree(entry); | |
9590837b KT |
510 | return ptr; |
511 | } | |
512 | ||
513 | /** | |
57c2590f TH |
514 | * tomoyo_profile - Find a profile. |
515 | * | |
bd03a3e4 | 516 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
57c2590f TH |
517 | * @profile: Profile number to find. |
518 | * | |
519 | * Returns pointer to "struct tomoyo_profile". | |
520 | */ | |
bd03a3e4 TH |
521 | struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns, |
522 | const u8 profile) | |
57c2590f | 523 | { |
d5ca1725 | 524 | static struct tomoyo_profile tomoyo_null_profile; |
bd03a3e4 | 525 | struct tomoyo_profile *ptr = ns->profile_ptr[profile]; |
d5ca1725 TH |
526 | if (!ptr) |
527 | ptr = &tomoyo_null_profile; | |
57c2590f TH |
528 | return ptr; |
529 | } | |
530 | ||
d5ca1725 TH |
531 | /** |
532 | * tomoyo_find_yesno - Find values for specified keyword. | |
533 | * | |
534 | * @string: String to check. | |
535 | * @find: Name of keyword. | |
536 | * | |
537 | * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise. | |
538 | */ | |
8e568687 TH |
539 | static s8 tomoyo_find_yesno(const char *string, const char *find) |
540 | { | |
541 | const char *cp = strstr(string, find); | |
542 | if (cp) { | |
543 | cp += strlen(find); | |
544 | if (!strncmp(cp, "=yes", 4)) | |
545 | return 1; | |
546 | else if (!strncmp(cp, "=no", 3)) | |
547 | return 0; | |
548 | } | |
549 | return -1; | |
550 | } | |
551 | ||
d5ca1725 TH |
552 | /** |
553 | * tomoyo_set_uint - Set value for specified preference. | |
554 | * | |
555 | * @i: Pointer to "unsigned int". | |
556 | * @string: String to check. | |
557 | * @find: Name of keyword. | |
558 | * | |
559 | * Returns nothing. | |
560 | */ | |
8e568687 TH |
561 | static void tomoyo_set_uint(unsigned int *i, const char *string, |
562 | const char *find) | |
563 | { | |
564 | const char *cp = strstr(string, find); | |
565 | if (cp) | |
566 | sscanf(cp + strlen(find), "=%u", i); | |
567 | } | |
568 | ||
d5ca1725 TH |
569 | /** |
570 | * tomoyo_set_mode - Set mode for specified profile. | |
571 | * | |
572 | * @name: Name of functionality. | |
573 | * @value: Mode for @name. | |
574 | * @profile: Pointer to "struct tomoyo_profile". | |
575 | * | |
576 | * Returns 0 on success, negative value otherwise. | |
577 | */ | |
8e568687 | 578 | static int tomoyo_set_mode(char *name, const char *value, |
8e568687 TH |
579 | struct tomoyo_profile *profile) |
580 | { | |
581 | u8 i; | |
582 | u8 config; | |
583 | if (!strcmp(name, "CONFIG")) { | |
584 | i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX; | |
585 | config = profile->default_config; | |
586 | } else if (tomoyo_str_starts(&name, "CONFIG::")) { | |
587 | config = 0; | |
588 | for (i = 0; i < TOMOYO_MAX_MAC_INDEX | |
589 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) { | |
2c47ab93 TH |
590 | int len = 0; |
591 | if (i < TOMOYO_MAX_MAC_INDEX) { | |
592 | const u8 c = tomoyo_index2category[i]; | |
593 | const char *category = | |
594 | tomoyo_category_keywords[c]; | |
595 | len = strlen(category); | |
596 | if (strncmp(name, category, len) || | |
597 | name[len++] != ':' || name[len++] != ':') | |
598 | continue; | |
599 | } | |
600 | if (strcmp(name + len, tomoyo_mac_keywords[i])) | |
8e568687 TH |
601 | continue; |
602 | config = profile->config[i]; | |
603 | break; | |
604 | } | |
605 | if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) | |
606 | return -EINVAL; | |
607 | } else { | |
608 | return -EINVAL; | |
609 | } | |
d5ca1725 | 610 | if (strstr(value, "use_default")) { |
8e568687 TH |
611 | config = TOMOYO_CONFIG_USE_DEFAULT; |
612 | } else { | |
613 | u8 mode; | |
614 | for (mode = 0; mode < 4; mode++) | |
615 | if (strstr(value, tomoyo_mode[mode])) | |
616 | /* | |
617 | * Update lower 3 bits in order to distinguish | |
618 | * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'. | |
619 | */ | |
620 | config = (config & ~7) | mode; | |
eadd99cc TH |
621 | if (config != TOMOYO_CONFIG_USE_DEFAULT) { |
622 | switch (tomoyo_find_yesno(value, "grant_log")) { | |
623 | case 1: | |
624 | config |= TOMOYO_CONFIG_WANT_GRANT_LOG; | |
625 | break; | |
626 | case 0: | |
627 | config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG; | |
628 | break; | |
629 | } | |
630 | switch (tomoyo_find_yesno(value, "reject_log")) { | |
631 | case 1: | |
632 | config |= TOMOYO_CONFIG_WANT_REJECT_LOG; | |
633 | break; | |
634 | case 0: | |
635 | config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG; | |
636 | break; | |
637 | } | |
638 | } | |
8e568687 TH |
639 | } |
640 | if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX) | |
641 | profile->config[i] = config; | |
642 | else if (config != TOMOYO_CONFIG_USE_DEFAULT) | |
643 | profile->default_config = config; | |
644 | return 0; | |
645 | } | |
646 | ||
57c2590f TH |
647 | /** |
648 | * tomoyo_write_profile - Write profile table. | |
9590837b KT |
649 | * |
650 | * @head: Pointer to "struct tomoyo_io_buffer". | |
651 | * | |
652 | * Returns 0 on success, negative value otherwise. | |
653 | */ | |
654 | static int tomoyo_write_profile(struct tomoyo_io_buffer *head) | |
655 | { | |
656 | char *data = head->write_buf; | |
657 | unsigned int i; | |
9590837b KT |
658 | char *cp; |
659 | struct tomoyo_profile *profile; | |
bd03a3e4 TH |
660 | if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version) |
661 | == 1) | |
57c2590f TH |
662 | return 0; |
663 | i = simple_strtoul(data, &cp, 10); | |
d5ca1725 TH |
664 | if (*cp != '-') |
665 | return -EINVAL; | |
666 | data = cp + 1; | |
bd03a3e4 | 667 | profile = tomoyo_assign_profile(head->w.ns, i); |
d5ca1725 TH |
668 | if (!profile) |
669 | return -EINVAL; | |
9590837b KT |
670 | cp = strchr(data, '='); |
671 | if (!cp) | |
672 | return -EINVAL; | |
57c2590f | 673 | *cp++ = '\0'; |
9590837b | 674 | if (!strcmp(data, "COMMENT")) { |
2a086e5d TH |
675 | static DEFINE_SPINLOCK(lock); |
676 | const struct tomoyo_path_info *new_comment | |
677 | = tomoyo_get_name(cp); | |
678 | const struct tomoyo_path_info *old_comment; | |
679 | if (!new_comment) | |
680 | return -ENOMEM; | |
681 | spin_lock(&lock); | |
682 | old_comment = profile->comment; | |
683 | profile->comment = new_comment; | |
684 | spin_unlock(&lock); | |
bf24fb01 | 685 | tomoyo_put_name(old_comment); |
9590837b KT |
686 | return 0; |
687 | } | |
d5ca1725 TH |
688 | if (!strcmp(data, "PREFERENCE")) { |
689 | for (i = 0; i < TOMOYO_MAX_PREF; i++) | |
690 | tomoyo_set_uint(&profile->pref[i], cp, | |
691 | tomoyo_pref_keywords[i]); | |
692 | return 0; | |
f23571e8 | 693 | } |
d5ca1725 | 694 | return tomoyo_set_mode(data, cp, profile); |
f23571e8 TH |
695 | } |
696 | ||
eadd99cc TH |
697 | /** |
698 | * tomoyo_print_config - Print mode for specified functionality. | |
699 | * | |
700 | * @head: Pointer to "struct tomoyo_io_buffer". | |
701 | * @config: Mode for that functionality. | |
702 | * | |
703 | * Returns nothing. | |
704 | * | |
705 | * Caller prints functionality's name. | |
706 | */ | |
f23571e8 TH |
707 | static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config) |
708 | { | |
eadd99cc TH |
709 | tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n", |
710 | tomoyo_mode[config & 3], | |
711 | tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG), | |
712 | tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG)); | |
f23571e8 TH |
713 | } |
714 | ||
9590837b | 715 | /** |
57c2590f | 716 | * tomoyo_read_profile - Read profile table. |
9590837b KT |
717 | * |
718 | * @head: Pointer to "struct tomoyo_io_buffer". | |
eadd99cc TH |
719 | * |
720 | * Returns nothing. | |
9590837b | 721 | */ |
8fbe71f0 | 722 | static void tomoyo_read_profile(struct tomoyo_io_buffer *head) |
9590837b | 723 | { |
f23571e8 | 724 | u8 index; |
bd03a3e4 TH |
725 | struct tomoyo_policy_namespace *ns = |
726 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
f23571e8 | 727 | const struct tomoyo_profile *profile; |
bd03a3e4 TH |
728 | if (head->r.eof) |
729 | return; | |
f23571e8 TH |
730 | next: |
731 | index = head->r.index; | |
bd03a3e4 | 732 | profile = ns->profile_ptr[index]; |
f23571e8 TH |
733 | switch (head->r.step) { |
734 | case 0: | |
bd03a3e4 TH |
735 | tomoyo_print_namespace(head); |
736 | tomoyo_io_printf(head, "PROFILE_VERSION=%u\n", | |
737 | ns->profile_version); | |
f23571e8 TH |
738 | head->r.step++; |
739 | break; | |
740 | case 1: | |
741 | for ( ; head->r.index < TOMOYO_MAX_PROFILES; | |
742 | head->r.index++) | |
bd03a3e4 | 743 | if (ns->profile_ptr[head->r.index]) |
f23571e8 TH |
744 | break; |
745 | if (head->r.index == TOMOYO_MAX_PROFILES) | |
746 | return; | |
747 | head->r.step++; | |
748 | break; | |
749 | case 2: | |
750 | { | |
d5ca1725 | 751 | u8 i; |
f23571e8 TH |
752 | const struct tomoyo_path_info *comment = |
753 | profile->comment; | |
bd03a3e4 | 754 | tomoyo_print_namespace(head); |
f23571e8 TH |
755 | tomoyo_io_printf(head, "%u-COMMENT=", index); |
756 | tomoyo_set_string(head, comment ? comment->name : ""); | |
757 | tomoyo_set_lf(head); | |
d5ca1725 TH |
758 | tomoyo_io_printf(head, "%u-PREFERENCE={ ", index); |
759 | for (i = 0; i < TOMOYO_MAX_PREF; i++) | |
760 | tomoyo_io_printf(head, "%s=%u ", | |
761 | tomoyo_pref_keywords[i], | |
762 | profile->pref[i]); | |
763 | tomoyo_set_string(head, "}\n"); | |
f23571e8 TH |
764 | head->r.step++; |
765 | } | |
766 | break; | |
767 | case 3: | |
768 | { | |
bd03a3e4 | 769 | tomoyo_print_namespace(head); |
f23571e8 TH |
770 | tomoyo_io_printf(head, "%u-%s", index, "CONFIG"); |
771 | tomoyo_print_config(head, profile->default_config); | |
772 | head->r.bit = 0; | |
773 | head->r.step++; | |
774 | } | |
775 | break; | |
776 | case 4: | |
777 | for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX | |
778 | + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) { | |
779 | const u8 i = head->r.bit; | |
780 | const u8 config = profile->config[i]; | |
57c2590f TH |
781 | if (config == TOMOYO_CONFIG_USE_DEFAULT) |
782 | continue; | |
bd03a3e4 | 783 | tomoyo_print_namespace(head); |
2c47ab93 TH |
784 | if (i < TOMOYO_MAX_MAC_INDEX) |
785 | tomoyo_io_printf(head, "%u-CONFIG::%s::%s", | |
786 | index, | |
787 | tomoyo_category_keywords | |
788 | [tomoyo_index2category[i]], | |
789 | tomoyo_mac_keywords[i]); | |
790 | else | |
791 | tomoyo_io_printf(head, "%u-CONFIG::%s", index, | |
792 | tomoyo_mac_keywords[i]); | |
f23571e8 TH |
793 | tomoyo_print_config(head, config); |
794 | head->r.bit++; | |
795 | break; | |
796 | } | |
797 | if (head->r.bit == TOMOYO_MAX_MAC_INDEX | |
798 | + TOMOYO_MAX_MAC_CATEGORY_INDEX) { | |
f23571e8 TH |
799 | head->r.index++; |
800 | head->r.step = 1; | |
9590837b | 801 | } |
57c2590f | 802 | break; |
9590837b | 803 | } |
f23571e8 TH |
804 | if (tomoyo_flush(head)) |
805 | goto next; | |
9590837b KT |
806 | } |
807 | ||
0f2a55d5 TH |
808 | /** |
809 | * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry. | |
810 | * | |
811 | * @a: Pointer to "struct tomoyo_acl_head". | |
812 | * @b: Pointer to "struct tomoyo_acl_head". | |
813 | * | |
814 | * Returns true if @a == @b, false otherwise. | |
815 | */ | |
e2bf6907 TH |
816 | static bool tomoyo_same_manager(const struct tomoyo_acl_head *a, |
817 | const struct tomoyo_acl_head *b) | |
36f5e1ff | 818 | { |
e2bf6907 TH |
819 | return container_of(a, struct tomoyo_manager, head)->manager == |
820 | container_of(b, struct tomoyo_manager, head)->manager; | |
36f5e1ff TH |
821 | } |
822 | ||
9590837b KT |
823 | /** |
824 | * tomoyo_update_manager_entry - Add a manager entry. | |
825 | * | |
826 | * @manager: The path to manager or the domainnamme. | |
827 | * @is_delete: True if it is a delete request. | |
828 | * | |
829 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
830 | * |
831 | * Caller holds tomoyo_read_lock(). | |
9590837b KT |
832 | */ |
833 | static int tomoyo_update_manager_entry(const char *manager, | |
834 | const bool is_delete) | |
835 | { | |
e2bf6907 | 836 | struct tomoyo_manager e = { }; |
a238cf5b | 837 | struct tomoyo_acl_param param = { |
bd03a3e4 | 838 | /* .ns = &tomoyo_kernel_namespace, */ |
a238cf5b | 839 | .is_delete = is_delete, |
bd03a3e4 TH |
840 | .list = &tomoyo_kernel_namespace. |
841 | policy_list[TOMOYO_ID_MANAGER], | |
a238cf5b TH |
842 | }; |
843 | int error = is_delete ? -ENOENT : -ENOMEM; | |
75093152 TH |
844 | if (tomoyo_domain_def(manager)) { |
845 | if (!tomoyo_correct_domain(manager)) | |
9590837b | 846 | return -EINVAL; |
9e4b50e9 | 847 | e.is_domain = true; |
9590837b | 848 | } else { |
75093152 | 849 | if (!tomoyo_correct_path(manager)) |
9590837b KT |
850 | return -EINVAL; |
851 | } | |
9e4b50e9 | 852 | e.manager = tomoyo_get_name(manager); |
a238cf5b TH |
853 | if (e.manager) { |
854 | error = tomoyo_update_policy(&e.head, sizeof(e), ¶m, | |
855 | tomoyo_same_manager); | |
856 | tomoyo_put_name(e.manager); | |
857 | } | |
9590837b KT |
858 | return error; |
859 | } | |
860 | ||
861 | /** | |
e2bf6907 | 862 | * tomoyo_write_manager - Write manager policy. |
9590837b KT |
863 | * |
864 | * @head: Pointer to "struct tomoyo_io_buffer". | |
865 | * | |
866 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
867 | * |
868 | * Caller holds tomoyo_read_lock(). | |
9590837b | 869 | */ |
e2bf6907 | 870 | static int tomoyo_write_manager(struct tomoyo_io_buffer *head) |
9590837b KT |
871 | { |
872 | char *data = head->write_buf; | |
9590837b KT |
873 | |
874 | if (!strcmp(data, "manage_by_non_root")) { | |
bd03a3e4 | 875 | tomoyo_manage_by_non_root = !head->w.is_delete; |
9590837b KT |
876 | return 0; |
877 | } | |
bd03a3e4 | 878 | return tomoyo_update_manager_entry(data, head->w.is_delete); |
9590837b KT |
879 | } |
880 | ||
881 | /** | |
e2bf6907 | 882 | * tomoyo_read_manager - Read manager policy. |
9590837b KT |
883 | * |
884 | * @head: Pointer to "struct tomoyo_io_buffer". | |
885 | * | |
fdb8ebb7 | 886 | * Caller holds tomoyo_read_lock(). |
9590837b | 887 | */ |
e2bf6907 | 888 | static void tomoyo_read_manager(struct tomoyo_io_buffer *head) |
9590837b | 889 | { |
f23571e8 | 890 | if (head->r.eof) |
8fbe71f0 | 891 | return; |
bd03a3e4 TH |
892 | list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace. |
893 | policy_list[TOMOYO_ID_MANAGER]) { | |
e2bf6907 | 894 | struct tomoyo_manager *ptr = |
f23571e8 | 895 | list_entry(head->r.acl, typeof(*ptr), head.list); |
82e0f001 | 896 | if (ptr->head.is_deleted) |
9590837b | 897 | continue; |
f23571e8 TH |
898 | if (!tomoyo_flush(head)) |
899 | return; | |
900 | tomoyo_set_string(head, ptr->manager->name); | |
901 | tomoyo_set_lf(head); | |
9590837b | 902 | } |
f23571e8 | 903 | head->r.eof = true; |
9590837b KT |
904 | } |
905 | ||
906 | /** | |
e2bf6907 | 907 | * tomoyo_manager - Check whether the current process is a policy manager. |
9590837b KT |
908 | * |
909 | * Returns true if the current process is permitted to modify policy | |
910 | * via /sys/kernel/security/tomoyo/ interface. | |
fdb8ebb7 TH |
911 | * |
912 | * Caller holds tomoyo_read_lock(). | |
9590837b | 913 | */ |
e2bf6907 | 914 | static bool tomoyo_manager(void) |
9590837b | 915 | { |
e2bf6907 | 916 | struct tomoyo_manager *ptr; |
9590837b KT |
917 | const char *exe; |
918 | const struct task_struct *task = current; | |
919 | const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname; | |
920 | bool found = false; | |
921 | ||
922 | if (!tomoyo_policy_loaded) | |
923 | return true; | |
924 | if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid)) | |
925 | return false; | |
bd03a3e4 TH |
926 | list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace. |
927 | policy_list[TOMOYO_ID_MANAGER], head.list) { | |
82e0f001 | 928 | if (!ptr->head.is_deleted && ptr->is_domain |
9590837b KT |
929 | && !tomoyo_pathcmp(domainname, ptr->manager)) { |
930 | found = true; | |
931 | break; | |
932 | } | |
933 | } | |
9590837b KT |
934 | if (found) |
935 | return true; | |
936 | exe = tomoyo_get_exe(); | |
937 | if (!exe) | |
938 | return false; | |
bd03a3e4 TH |
939 | list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace. |
940 | policy_list[TOMOYO_ID_MANAGER], head.list) { | |
82e0f001 | 941 | if (!ptr->head.is_deleted && !ptr->is_domain |
9590837b KT |
942 | && !strcmp(exe, ptr->manager->name)) { |
943 | found = true; | |
944 | break; | |
945 | } | |
946 | } | |
9590837b KT |
947 | if (!found) { /* Reduce error messages. */ |
948 | static pid_t last_pid; | |
949 | const pid_t pid = current->pid; | |
950 | if (last_pid != pid) { | |
951 | printk(KERN_WARNING "%s ( %s ) is not permitted to " | |
952 | "update policies.\n", domainname->name, exe); | |
953 | last_pid = pid; | |
954 | } | |
955 | } | |
8e2d39a1 | 956 | kfree(exe); |
9590837b KT |
957 | return found; |
958 | } | |
959 | ||
960 | /** | |
bd03a3e4 | 961 | * tomoyo_select_domain - Parse select command. |
9590837b KT |
962 | * |
963 | * @head: Pointer to "struct tomoyo_io_buffer". | |
964 | * @data: String to parse. | |
965 | * | |
966 | * Returns true on success, false otherwise. | |
fdb8ebb7 TH |
967 | * |
968 | * Caller holds tomoyo_read_lock(). | |
9590837b | 969 | */ |
bd03a3e4 TH |
970 | static bool tomoyo_select_domain(struct tomoyo_io_buffer *head, |
971 | const char *data) | |
9590837b KT |
972 | { |
973 | unsigned int pid; | |
974 | struct tomoyo_domain_info *domain = NULL; | |
9b244373 | 975 | bool global_pid = false; |
bd03a3e4 TH |
976 | if (strncmp(data, "select ", 7)) |
977 | return false; | |
978 | data += 7; | |
9b244373 TH |
979 | if (sscanf(data, "pid=%u", &pid) == 1 || |
980 | (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) { | |
9590837b | 981 | struct task_struct *p; |
1fcdc7c5 | 982 | rcu_read_lock(); |
9590837b | 983 | read_lock(&tasklist_lock); |
9b244373 TH |
984 | if (global_pid) |
985 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
986 | else | |
987 | p = find_task_by_vpid(pid); | |
9590837b KT |
988 | if (p) |
989 | domain = tomoyo_real_domain(p); | |
990 | read_unlock(&tasklist_lock); | |
1fcdc7c5 | 991 | rcu_read_unlock(); |
9590837b | 992 | } else if (!strncmp(data, "domain=", 7)) { |
75093152 | 993 | if (tomoyo_domain_def(data + 7)) |
9590837b | 994 | domain = tomoyo_find_domain(data + 7); |
9590837b KT |
995 | } else |
996 | return false; | |
0df7e8b8 | 997 | head->w.domain = domain; |
9590837b KT |
998 | /* Accessing read_buf is safe because head->io_sem is held. */ |
999 | if (!head->read_buf) | |
1000 | return true; /* Do nothing if open(O_WRONLY). */ | |
f23571e8 TH |
1001 | memset(&head->r, 0, sizeof(head->r)); |
1002 | head->r.print_this_domain_only = true; | |
68eda8f5 DC |
1003 | if (domain) |
1004 | head->r.domain = &domain->list; | |
1005 | else | |
1006 | head->r.eof = 1; | |
9590837b | 1007 | tomoyo_io_printf(head, "# select %s\n", data); |
475e6fa3 TH |
1008 | if (domain && domain->is_deleted) |
1009 | tomoyo_io_printf(head, "# This is a deleted domain.\n"); | |
9590837b KT |
1010 | return true; |
1011 | } | |
1012 | ||
ccf135f5 TH |
1013 | /** |
1014 | * tomoyo_delete_domain - Delete a domain. | |
1015 | * | |
1016 | * @domainname: The name of domain. | |
1017 | * | |
1018 | * Returns 0. | |
fdb8ebb7 TH |
1019 | * |
1020 | * Caller holds tomoyo_read_lock(). | |
ccf135f5 TH |
1021 | */ |
1022 | static int tomoyo_delete_domain(char *domainname) | |
1023 | { | |
1024 | struct tomoyo_domain_info *domain; | |
1025 | struct tomoyo_path_info name; | |
1026 | ||
1027 | name.name = domainname; | |
1028 | tomoyo_fill_path_info(&name); | |
29282381 TH |
1029 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
1030 | return 0; | |
ccf135f5 | 1031 | /* Is there an active domain? */ |
fdb8ebb7 | 1032 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
ccf135f5 TH |
1033 | /* Never delete tomoyo_kernel_domain */ |
1034 | if (domain == &tomoyo_kernel_domain) | |
1035 | continue; | |
1036 | if (domain->is_deleted || | |
1037 | tomoyo_pathcmp(domain->domainname, &name)) | |
1038 | continue; | |
1039 | domain->is_deleted = true; | |
1040 | break; | |
1041 | } | |
f737d95d | 1042 | mutex_unlock(&tomoyo_policy_lock); |
ccf135f5 TH |
1043 | return 0; |
1044 | } | |
1045 | ||
17fcfbd9 | 1046 | /** |
e2bf6907 | 1047 | * tomoyo_write_domain2 - Write domain policy. |
17fcfbd9 | 1048 | * |
bd03a3e4 | 1049 | * @ns: Pointer to "struct tomoyo_policy_namespace". |
a238cf5b TH |
1050 | * @list: Pointer to "struct list_head". |
1051 | * @data: Policy to be interpreted. | |
1052 | * @is_delete: True if it is a delete request. | |
17fcfbd9 TH |
1053 | * |
1054 | * Returns 0 on success, negative value otherwise. | |
1055 | * | |
1056 | * Caller holds tomoyo_read_lock(). | |
1057 | */ | |
bd03a3e4 TH |
1058 | static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns, |
1059 | struct list_head *list, char *data, | |
e2bf6907 | 1060 | const bool is_delete) |
17fcfbd9 | 1061 | { |
a238cf5b | 1062 | struct tomoyo_acl_param param = { |
bd03a3e4 | 1063 | .ns = ns, |
a238cf5b TH |
1064 | .list = list, |
1065 | .data = data, | |
1066 | .is_delete = is_delete, | |
1067 | }; | |
1068 | static const struct { | |
1069 | const char *keyword; | |
1070 | int (*write) (struct tomoyo_acl_param *); | |
059d84db | 1071 | } tomoyo_callback[4] = { |
a238cf5b | 1072 | { "file ", tomoyo_write_file }, |
059d84db TH |
1073 | { "network inet ", tomoyo_write_inet_network }, |
1074 | { "network unix ", tomoyo_write_unix_network }, | |
d58e0da8 | 1075 | { "misc ", tomoyo_write_misc }, |
a238cf5b TH |
1076 | }; |
1077 | u8 i; | |
d58e0da8 TH |
1078 | |
1079 | for (i = 0; i < ARRAY_SIZE(tomoyo_callback); i++) { | |
a238cf5b TH |
1080 | if (!tomoyo_str_starts(¶m.data, |
1081 | tomoyo_callback[i].keyword)) | |
1082 | continue; | |
1083 | return tomoyo_callback[i].write(¶m); | |
1084 | } | |
1085 | return -EINVAL; | |
17fcfbd9 TH |
1086 | } |
1087 | ||
2c47ab93 TH |
1088 | /* String table for domain flags. */ |
1089 | const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = { | |
1090 | [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n", | |
1091 | [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n", | |
1092 | }; | |
1093 | ||
9590837b | 1094 | /** |
e2bf6907 | 1095 | * tomoyo_write_domain - Write domain policy. |
9590837b KT |
1096 | * |
1097 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1098 | * | |
1099 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1100 | * |
1101 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1102 | */ |
e2bf6907 | 1103 | static int tomoyo_write_domain(struct tomoyo_io_buffer *head) |
9590837b KT |
1104 | { |
1105 | char *data = head->write_buf; | |
bd03a3e4 | 1106 | struct tomoyo_policy_namespace *ns; |
0df7e8b8 | 1107 | struct tomoyo_domain_info *domain = head->w.domain; |
bd03a3e4 TH |
1108 | const bool is_delete = head->w.is_delete; |
1109 | bool is_select = !is_delete && tomoyo_str_starts(&data, "select "); | |
9590837b | 1110 | unsigned int profile; |
bd03a3e4 | 1111 | if (*data == '<') { |
9590837b KT |
1112 | domain = NULL; |
1113 | if (is_delete) | |
1114 | tomoyo_delete_domain(data); | |
fdb8ebb7 | 1115 | else if (is_select) |
9590837b | 1116 | domain = tomoyo_find_domain(data); |
fdb8ebb7 | 1117 | else |
bd03a3e4 | 1118 | domain = tomoyo_assign_domain(data, false); |
0df7e8b8 | 1119 | head->w.domain = domain; |
9590837b KT |
1120 | return 0; |
1121 | } | |
1122 | if (!domain) | |
1123 | return -EINVAL; | |
bd03a3e4 | 1124 | ns = domain->ns; |
b5bc60b4 | 1125 | if (sscanf(data, "use_profile %u", &profile) == 1 |
9590837b | 1126 | && profile < TOMOYO_MAX_PROFILES) { |
bd03a3e4 | 1127 | if (!tomoyo_policy_loaded || ns->profile_ptr[profile]) |
9590837b KT |
1128 | domain->profile = (u8) profile; |
1129 | return 0; | |
1130 | } | |
32997144 TH |
1131 | if (sscanf(data, "use_group %u\n", &profile) == 1 |
1132 | && profile < TOMOYO_MAX_ACL_GROUPS) { | |
1133 | if (!is_delete) | |
1134 | domain->group = (u8) profile; | |
1135 | return 0; | |
1136 | } | |
2c47ab93 TH |
1137 | for (profile = 0; profile < TOMOYO_MAX_DOMAIN_INFO_FLAGS; profile++) { |
1138 | const char *cp = tomoyo_dif[profile]; | |
1139 | if (strncmp(data, cp, strlen(cp) - 1)) | |
1140 | continue; | |
1141 | domain->flags[profile] = !is_delete; | |
9b244373 TH |
1142 | return 0; |
1143 | } | |
bd03a3e4 TH |
1144 | return tomoyo_write_domain2(ns, &domain->acl_info_list, data, |
1145 | is_delete); | |
9590837b KT |
1146 | } |
1147 | ||
2066a361 TH |
1148 | /** |
1149 | * tomoyo_print_condition - Print condition part. | |
1150 | * | |
1151 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1152 | * @cond: Pointer to "struct tomoyo_condition". | |
1153 | * | |
1154 | * Returns true on success, false otherwise. | |
1155 | */ | |
1156 | static bool tomoyo_print_condition(struct tomoyo_io_buffer *head, | |
1157 | const struct tomoyo_condition *cond) | |
1158 | { | |
1159 | switch (head->r.cond_step) { | |
1160 | case 0: | |
1161 | head->r.cond_index = 0; | |
1162 | head->r.cond_step++; | |
1163 | /* fall through */ | |
1164 | case 1: | |
1165 | { | |
1166 | const u16 condc = cond->condc; | |
1167 | const struct tomoyo_condition_element *condp = | |
1168 | (typeof(condp)) (cond + 1); | |
1169 | const struct tomoyo_number_union *numbers_p = | |
1170 | (typeof(numbers_p)) (condp + condc); | |
2ca9bf45 TH |
1171 | const struct tomoyo_name_union *names_p = |
1172 | (typeof(names_p)) | |
1173 | (numbers_p + cond->numbers_count); | |
5b636857 TH |
1174 | const struct tomoyo_argv *argv = |
1175 | (typeof(argv)) (names_p + cond->names_count); | |
1176 | const struct tomoyo_envp *envp = | |
1177 | (typeof(envp)) (argv + cond->argc); | |
2066a361 TH |
1178 | u16 skip; |
1179 | for (skip = 0; skip < head->r.cond_index; skip++) { | |
1180 | const u8 left = condp->left; | |
1181 | const u8 right = condp->right; | |
1182 | condp++; | |
1183 | switch (left) { | |
5b636857 TH |
1184 | case TOMOYO_ARGV_ENTRY: |
1185 | argv++; | |
1186 | continue; | |
1187 | case TOMOYO_ENVP_ENTRY: | |
1188 | envp++; | |
1189 | continue; | |
2066a361 TH |
1190 | case TOMOYO_NUMBER_UNION: |
1191 | numbers_p++; | |
1192 | break; | |
1193 | } | |
1194 | switch (right) { | |
2ca9bf45 TH |
1195 | case TOMOYO_NAME_UNION: |
1196 | names_p++; | |
1197 | break; | |
2066a361 TH |
1198 | case TOMOYO_NUMBER_UNION: |
1199 | numbers_p++; | |
1200 | break; | |
1201 | } | |
1202 | } | |
1203 | while (head->r.cond_index < condc) { | |
1204 | const u8 match = condp->equals; | |
1205 | const u8 left = condp->left; | |
1206 | const u8 right = condp->right; | |
1207 | if (!tomoyo_flush(head)) | |
1208 | return false; | |
1209 | condp++; | |
1210 | head->r.cond_index++; | |
1211 | tomoyo_set_space(head); | |
1212 | switch (left) { | |
5b636857 TH |
1213 | case TOMOYO_ARGV_ENTRY: |
1214 | tomoyo_io_printf(head, | |
1215 | "exec.argv[%lu]%s=\"", | |
1216 | argv->index, argv-> | |
1217 | is_not ? "!" : ""); | |
1218 | tomoyo_set_string(head, | |
1219 | argv->value->name); | |
1220 | tomoyo_set_string(head, "\""); | |
1221 | argv++; | |
1222 | continue; | |
1223 | case TOMOYO_ENVP_ENTRY: | |
1224 | tomoyo_set_string(head, | |
1225 | "exec.envp[\""); | |
1226 | tomoyo_set_string(head, | |
1227 | envp->name->name); | |
1228 | tomoyo_io_printf(head, "\"]%s=", envp-> | |
1229 | is_not ? "!" : ""); | |
1230 | if (envp->value) { | |
1231 | tomoyo_set_string(head, "\""); | |
1232 | tomoyo_set_string(head, envp-> | |
1233 | value->name); | |
1234 | tomoyo_set_string(head, "\""); | |
1235 | } else { | |
1236 | tomoyo_set_string(head, | |
1237 | "NULL"); | |
1238 | } | |
1239 | envp++; | |
1240 | continue; | |
2066a361 TH |
1241 | case TOMOYO_NUMBER_UNION: |
1242 | tomoyo_print_number_union_nospace | |
1243 | (head, numbers_p++); | |
1244 | break; | |
1245 | default: | |
1246 | tomoyo_set_string(head, | |
1247 | tomoyo_condition_keyword[left]); | |
1248 | break; | |
1249 | } | |
1250 | tomoyo_set_string(head, match ? "=" : "!="); | |
1251 | switch (right) { | |
2ca9bf45 TH |
1252 | case TOMOYO_NAME_UNION: |
1253 | tomoyo_print_name_union_quoted | |
1254 | (head, names_p++); | |
1255 | break; | |
2066a361 TH |
1256 | case TOMOYO_NUMBER_UNION: |
1257 | tomoyo_print_number_union_nospace | |
1258 | (head, numbers_p++); | |
1259 | break; | |
1260 | default: | |
1261 | tomoyo_set_string(head, | |
1262 | tomoyo_condition_keyword[right]); | |
1263 | break; | |
1264 | } | |
1265 | } | |
1266 | } | |
1267 | head->r.cond_step++; | |
1268 | /* fall through */ | |
1269 | case 2: | |
1270 | if (!tomoyo_flush(head)) | |
1271 | break; | |
1272 | head->r.cond_step++; | |
1273 | /* fall through */ | |
1274 | case 3: | |
1275 | tomoyo_set_lf(head); | |
1276 | return true; | |
1277 | } | |
1278 | return false; | |
1279 | } | |
1280 | ||
9590837b | 1281 | /** |
32997144 | 1282 | * tomoyo_set_group - Print "acl_group " header keyword and category name. |
9590837b | 1283 | * |
0d2171d7 TH |
1284 | * @head: Pointer to "struct tomoyo_io_buffer". |
1285 | * @category: Category name. | |
9590837b | 1286 | * |
0d2171d7 | 1287 | * Returns nothing. |
9590837b | 1288 | */ |
0d2171d7 TH |
1289 | static void tomoyo_set_group(struct tomoyo_io_buffer *head, |
1290 | const char *category) | |
9590837b | 1291 | { |
bd03a3e4 TH |
1292 | if (head->type == TOMOYO_EXCEPTIONPOLICY) { |
1293 | tomoyo_print_namespace(head); | |
32997144 TH |
1294 | tomoyo_io_printf(head, "acl_group %u ", |
1295 | head->r.acl_group_index); | |
bd03a3e4 | 1296 | } |
0d2171d7 | 1297 | tomoyo_set_string(head, category); |
9590837b KT |
1298 | } |
1299 | ||
1300 | /** | |
5db5a39b | 1301 | * tomoyo_print_entry - Print an ACL entry. |
9590837b KT |
1302 | * |
1303 | * @head: Pointer to "struct tomoyo_io_buffer". | |
5db5a39b | 1304 | * @acl: Pointer to an ACL entry. |
9590837b KT |
1305 | * |
1306 | * Returns true on success, false otherwise. | |
1307 | */ | |
5db5a39b TH |
1308 | static bool tomoyo_print_entry(struct tomoyo_io_buffer *head, |
1309 | struct tomoyo_acl_info *acl) | |
9590837b | 1310 | { |
5db5a39b | 1311 | const u8 acl_type = acl->type; |
0d2171d7 | 1312 | bool first = true; |
f23571e8 | 1313 | u8 bit; |
9590837b | 1314 | |
2066a361 TH |
1315 | if (head->r.print_cond_part) |
1316 | goto print_cond_part; | |
5db5a39b TH |
1317 | if (acl->is_deleted) |
1318 | return true; | |
f23571e8 TH |
1319 | if (!tomoyo_flush(head)) |
1320 | return false; | |
1321 | else if (acl_type == TOMOYO_TYPE_PATH_ACL) { | |
5db5a39b TH |
1322 | struct tomoyo_path_acl *ptr = |
1323 | container_of(acl, typeof(*ptr), head); | |
1324 | const u16 perm = ptr->perm; | |
0d2171d7 | 1325 | for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) { |
5db5a39b TH |
1326 | if (!(perm & (1 << bit))) |
1327 | continue; | |
bd03a3e4 | 1328 | if (head->r.print_transition_related_only && |
5db5a39b TH |
1329 | bit != TOMOYO_TYPE_EXECUTE) |
1330 | continue; | |
0d2171d7 TH |
1331 | if (first) { |
1332 | tomoyo_set_group(head, "file "); | |
1333 | first = false; | |
1334 | } else { | |
1335 | tomoyo_set_slash(head); | |
1336 | } | |
1337 | tomoyo_set_string(head, tomoyo_path_keyword[bit]); | |
5db5a39b | 1338 | } |
0d2171d7 TH |
1339 | if (first) |
1340 | return true; | |
f23571e8 | 1341 | tomoyo_print_name_union(head, &ptr->name); |
bd03a3e4 | 1342 | } else if (head->r.print_transition_related_only) { |
5db5a39b TH |
1343 | return true; |
1344 | } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) { | |
1345 | struct tomoyo_path2_acl *ptr = | |
1346 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 TH |
1347 | const u8 perm = ptr->perm; |
1348 | for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) { | |
1349 | if (!(perm & (1 << bit))) | |
1350 | continue; | |
1351 | if (first) { | |
1352 | tomoyo_set_group(head, "file "); | |
1353 | first = false; | |
1354 | } else { | |
1355 | tomoyo_set_slash(head); | |
1356 | } | |
1357 | tomoyo_set_string(head, tomoyo_mac_keywords | |
1358 | [tomoyo_pp2mac[bit]]); | |
1359 | } | |
1360 | if (first) | |
1361 | return true; | |
f23571e8 TH |
1362 | tomoyo_print_name_union(head, &ptr->name1); |
1363 | tomoyo_print_name_union(head, &ptr->name2); | |
5db5a39b TH |
1364 | } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) { |
1365 | struct tomoyo_path_number_acl *ptr = | |
1366 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 TH |
1367 | const u8 perm = ptr->perm; |
1368 | for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) { | |
1369 | if (!(perm & (1 << bit))) | |
1370 | continue; | |
1371 | if (first) { | |
1372 | tomoyo_set_group(head, "file "); | |
1373 | first = false; | |
1374 | } else { | |
1375 | tomoyo_set_slash(head); | |
1376 | } | |
1377 | tomoyo_set_string(head, tomoyo_mac_keywords | |
1378 | [tomoyo_pn2mac[bit]]); | |
1379 | } | |
1380 | if (first) | |
1381 | return true; | |
f23571e8 TH |
1382 | tomoyo_print_name_union(head, &ptr->name); |
1383 | tomoyo_print_number_union(head, &ptr->number); | |
5db5a39b TH |
1384 | } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) { |
1385 | struct tomoyo_mkdev_acl *ptr = | |
1386 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 TH |
1387 | const u8 perm = ptr->perm; |
1388 | for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) { | |
1389 | if (!(perm & (1 << bit))) | |
1390 | continue; | |
1391 | if (first) { | |
1392 | tomoyo_set_group(head, "file "); | |
1393 | first = false; | |
1394 | } else { | |
1395 | tomoyo_set_slash(head); | |
1396 | } | |
1397 | tomoyo_set_string(head, tomoyo_mac_keywords | |
1398 | [tomoyo_pnnn2mac[bit]]); | |
1399 | } | |
1400 | if (first) | |
1401 | return true; | |
f23571e8 TH |
1402 | tomoyo_print_name_union(head, &ptr->name); |
1403 | tomoyo_print_number_union(head, &ptr->mode); | |
1404 | tomoyo_print_number_union(head, &ptr->major); | |
1405 | tomoyo_print_number_union(head, &ptr->minor); | |
059d84db TH |
1406 | } else if (acl_type == TOMOYO_TYPE_INET_ACL) { |
1407 | struct tomoyo_inet_acl *ptr = | |
1408 | container_of(acl, typeof(*ptr), head); | |
1409 | const u8 perm = ptr->perm; | |
1410 | ||
1411 | for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) { | |
1412 | if (!(perm & (1 << bit))) | |
1413 | continue; | |
1414 | if (first) { | |
1415 | tomoyo_set_group(head, "network inet "); | |
1416 | tomoyo_set_string(head, tomoyo_proto_keyword | |
1417 | [ptr->protocol]); | |
1418 | tomoyo_set_space(head); | |
1419 | first = false; | |
1420 | } else { | |
1421 | tomoyo_set_slash(head); | |
1422 | } | |
1423 | tomoyo_set_string(head, tomoyo_socket_keyword[bit]); | |
1424 | } | |
1425 | if (first) | |
1426 | return true; | |
1427 | tomoyo_set_space(head); | |
1428 | if (ptr->address.group) { | |
1429 | tomoyo_set_string(head, "@"); | |
1430 | tomoyo_set_string(head, ptr->address.group->group_name | |
1431 | ->name); | |
1432 | } else { | |
1433 | char buf[128]; | |
1434 | tomoyo_print_ip(buf, sizeof(buf), &ptr->address); | |
1435 | tomoyo_io_printf(head, "%s", buf); | |
1436 | } | |
1437 | tomoyo_print_number_union(head, &ptr->port); | |
1438 | } else if (acl_type == TOMOYO_TYPE_UNIX_ACL) { | |
1439 | struct tomoyo_unix_acl *ptr = | |
1440 | container_of(acl, typeof(*ptr), head); | |
1441 | const u8 perm = ptr->perm; | |
1442 | ||
1443 | for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) { | |
1444 | if (!(perm & (1 << bit))) | |
1445 | continue; | |
1446 | if (first) { | |
1447 | tomoyo_set_group(head, "network unix "); | |
1448 | tomoyo_set_string(head, tomoyo_proto_keyword | |
1449 | [ptr->protocol]); | |
1450 | tomoyo_set_space(head); | |
1451 | first = false; | |
1452 | } else { | |
1453 | tomoyo_set_slash(head); | |
1454 | } | |
1455 | tomoyo_set_string(head, tomoyo_socket_keyword[bit]); | |
1456 | } | |
1457 | if (first) | |
1458 | return true; | |
1459 | tomoyo_print_name_union(head, &ptr->name); | |
5db5a39b TH |
1460 | } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) { |
1461 | struct tomoyo_mount_acl *ptr = | |
1462 | container_of(acl, typeof(*ptr), head); | |
0d2171d7 | 1463 | tomoyo_set_group(head, "file mount"); |
f23571e8 TH |
1464 | tomoyo_print_name_union(head, &ptr->dev_name); |
1465 | tomoyo_print_name_union(head, &ptr->dir_name); | |
1466 | tomoyo_print_name_union(head, &ptr->fs_type); | |
1467 | tomoyo_print_number_union(head, &ptr->flags); | |
d58e0da8 TH |
1468 | } else if (acl_type == TOMOYO_TYPE_ENV_ACL) { |
1469 | struct tomoyo_env_acl *ptr = | |
1470 | container_of(acl, typeof(*ptr), head); | |
1471 | ||
1472 | tomoyo_set_group(head, "misc env "); | |
1473 | tomoyo_set_string(head, ptr->env->name); | |
a1f9bb6a | 1474 | } |
2066a361 TH |
1475 | if (acl->cond) { |
1476 | head->r.print_cond_part = true; | |
1477 | head->r.cond_step = 0; | |
1478 | if (!tomoyo_flush(head)) | |
1479 | return false; | |
1480 | print_cond_part: | |
1481 | if (!tomoyo_print_condition(head, acl->cond)) | |
1482 | return false; | |
1483 | head->r.print_cond_part = false; | |
1484 | } else { | |
1485 | tomoyo_set_lf(head); | |
1486 | } | |
f23571e8 TH |
1487 | return true; |
1488 | } | |
1489 | ||
1490 | /** | |
1491 | * tomoyo_read_domain2 - Read domain policy. | |
1492 | * | |
32997144 TH |
1493 | * @head: Pointer to "struct tomoyo_io_buffer". |
1494 | * @list: Pointer to "struct list_head". | |
f23571e8 TH |
1495 | * |
1496 | * Caller holds tomoyo_read_lock(). | |
1497 | * | |
1498 | * Returns true on success, false otherwise. | |
1499 | */ | |
1500 | static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head, | |
32997144 | 1501 | struct list_head *list) |
f23571e8 | 1502 | { |
32997144 | 1503 | list_for_each_cookie(head->r.acl, list) { |
f23571e8 TH |
1504 | struct tomoyo_acl_info *ptr = |
1505 | list_entry(head->r.acl, typeof(*ptr), list); | |
1506 | if (!tomoyo_print_entry(head, ptr)) | |
1507 | return false; | |
1508 | } | |
1509 | head->r.acl = NULL; | |
a1f9bb6a | 1510 | return true; |
a1f9bb6a TH |
1511 | } |
1512 | ||
9590837b | 1513 | /** |
e2bf6907 | 1514 | * tomoyo_read_domain - Read domain policy. |
9590837b KT |
1515 | * |
1516 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1517 | * | |
fdb8ebb7 | 1518 | * Caller holds tomoyo_read_lock(). |
9590837b | 1519 | */ |
e2bf6907 | 1520 | static void tomoyo_read_domain(struct tomoyo_io_buffer *head) |
9590837b | 1521 | { |
f23571e8 | 1522 | if (head->r.eof) |
8fbe71f0 | 1523 | return; |
f23571e8 | 1524 | list_for_each_cookie(head->r.domain, &tomoyo_domain_list) { |
475e6fa3 | 1525 | struct tomoyo_domain_info *domain = |
f23571e8 TH |
1526 | list_entry(head->r.domain, typeof(*domain), list); |
1527 | switch (head->r.step) { | |
2c47ab93 | 1528 | u8 i; |
f23571e8 TH |
1529 | case 0: |
1530 | if (domain->is_deleted && | |
1531 | !head->r.print_this_domain_only) | |
1532 | continue; | |
1533 | /* Print domainname and flags. */ | |
1534 | tomoyo_set_string(head, domain->domainname->name); | |
1535 | tomoyo_set_lf(head); | |
b5bc60b4 | 1536 | tomoyo_io_printf(head, "use_profile %u\n", |
f23571e8 | 1537 | domain->profile); |
32997144 TH |
1538 | tomoyo_io_printf(head, "use_group %u\n", |
1539 | domain->group); | |
2c47ab93 TH |
1540 | for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++) |
1541 | if (domain->flags[i]) | |
1542 | tomoyo_set_string(head, tomoyo_dif[i]); | |
f23571e8 TH |
1543 | head->r.step++; |
1544 | tomoyo_set_lf(head); | |
1545 | /* fall through */ | |
1546 | case 1: | |
32997144 | 1547 | if (!tomoyo_read_domain2(head, &domain->acl_info_list)) |
f23571e8 TH |
1548 | return; |
1549 | head->r.step++; | |
1550 | if (!tomoyo_set_lf(head)) | |
1551 | return; | |
1552 | /* fall through */ | |
1553 | case 2: | |
1554 | head->r.step = 0; | |
1555 | if (head->r.print_this_domain_only) | |
1556 | goto done; | |
9590837b | 1557 | } |
9590837b | 1558 | } |
f23571e8 TH |
1559 | done: |
1560 | head->r.eof = true; | |
9590837b KT |
1561 | } |
1562 | ||
9590837b KT |
1563 | /** |
1564 | * tomoyo_write_pid: Specify PID to obtain domainname. | |
1565 | * | |
1566 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1567 | * | |
1568 | * Returns 0. | |
1569 | */ | |
1570 | static int tomoyo_write_pid(struct tomoyo_io_buffer *head) | |
1571 | { | |
f23571e8 | 1572 | head->r.eof = false; |
9590837b KT |
1573 | return 0; |
1574 | } | |
1575 | ||
1576 | /** | |
1577 | * tomoyo_read_pid - Get domainname of the specified PID. | |
1578 | * | |
1579 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1580 | * | |
1581 | * Returns the domainname which the specified PID is in on success, | |
1582 | * empty string otherwise. | |
1583 | * The PID is specified by tomoyo_write_pid() so that the user can obtain | |
1584 | * using read()/write() interface rather than sysctl() interface. | |
1585 | */ | |
8fbe71f0 | 1586 | static void tomoyo_read_pid(struct tomoyo_io_buffer *head) |
9590837b | 1587 | { |
f23571e8 TH |
1588 | char *buf = head->write_buf; |
1589 | bool global_pid = false; | |
1590 | unsigned int pid; | |
1591 | struct task_struct *p; | |
1592 | struct tomoyo_domain_info *domain = NULL; | |
1593 | ||
1594 | /* Accessing write_buf is safe because head->io_sem is held. */ | |
1595 | if (!buf) { | |
1596 | head->r.eof = true; | |
1597 | return; /* Do nothing if open(O_RDONLY). */ | |
9590837b | 1598 | } |
f23571e8 TH |
1599 | if (head->r.w_pos || head->r.eof) |
1600 | return; | |
1601 | head->r.eof = true; | |
1602 | if (tomoyo_str_starts(&buf, "global-pid ")) | |
1603 | global_pid = true; | |
1604 | pid = (unsigned int) simple_strtoul(buf, NULL, 10); | |
1605 | rcu_read_lock(); | |
1606 | read_lock(&tasklist_lock); | |
1607 | if (global_pid) | |
1608 | p = find_task_by_pid_ns(pid, &init_pid_ns); | |
1609 | else | |
1610 | p = find_task_by_vpid(pid); | |
1611 | if (p) | |
1612 | domain = tomoyo_real_domain(p); | |
1613 | read_unlock(&tasklist_lock); | |
1614 | rcu_read_unlock(); | |
1615 | if (!domain) | |
1616 | return; | |
1617 | tomoyo_io_printf(head, "%u %u ", pid, domain->profile); | |
1618 | tomoyo_set_string(head, domain->domainname->name); | |
9590837b KT |
1619 | } |
1620 | ||
0f2a55d5 | 1621 | /* String table for domain transition control keywords. */ |
5448ec4f | 1622 | static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = { |
bd03a3e4 TH |
1623 | [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ", |
1624 | [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ", | |
1625 | [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ", | |
1626 | [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ", | |
1627 | [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ", | |
1628 | [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ", | |
5448ec4f TH |
1629 | }; |
1630 | ||
0f2a55d5 | 1631 | /* String table for grouping keywords. */ |
e2bf6907 | 1632 | static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = { |
059d84db TH |
1633 | [TOMOYO_PATH_GROUP] = "path_group ", |
1634 | [TOMOYO_NUMBER_GROUP] = "number_group ", | |
1635 | [TOMOYO_ADDRESS_GROUP] = "address_group ", | |
e2bf6907 TH |
1636 | }; |
1637 | ||
9590837b | 1638 | /** |
e2bf6907 | 1639 | * tomoyo_write_exception - Write exception policy. |
9590837b KT |
1640 | * |
1641 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1642 | * | |
1643 | * Returns 0 on success, negative value otherwise. | |
fdb8ebb7 TH |
1644 | * |
1645 | * Caller holds tomoyo_read_lock(). | |
9590837b | 1646 | */ |
e2bf6907 | 1647 | static int tomoyo_write_exception(struct tomoyo_io_buffer *head) |
9590837b | 1648 | { |
bd03a3e4 | 1649 | const bool is_delete = head->w.is_delete; |
a238cf5b | 1650 | struct tomoyo_acl_param param = { |
bd03a3e4 TH |
1651 | .ns = head->w.ns, |
1652 | .is_delete = is_delete, | |
a238cf5b | 1653 | .data = head->write_buf, |
e2bf6907 | 1654 | }; |
a238cf5b | 1655 | u8 i; |
a238cf5b TH |
1656 | if (tomoyo_str_starts(¶m.data, "aggregator ")) |
1657 | return tomoyo_write_aggregator(¶m); | |
e2bf6907 | 1658 | for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++) |
a238cf5b TH |
1659 | if (tomoyo_str_starts(¶m.data, tomoyo_transition_type[i])) |
1660 | return tomoyo_write_transition_control(¶m, i); | |
e2bf6907 | 1661 | for (i = 0; i < TOMOYO_MAX_GROUP; i++) |
a238cf5b TH |
1662 | if (tomoyo_str_starts(¶m.data, tomoyo_group_name[i])) |
1663 | return tomoyo_write_group(¶m, i); | |
32997144 TH |
1664 | if (tomoyo_str_starts(¶m.data, "acl_group ")) { |
1665 | unsigned int group; | |
1666 | char *data; | |
1667 | group = simple_strtoul(param.data, &data, 10); | |
1668 | if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ') | |
bd03a3e4 TH |
1669 | return tomoyo_write_domain2 |
1670 | (head->w.ns, &head->w.ns->acl_group[group], | |
1671 | data, is_delete); | |
32997144 | 1672 | } |
9590837b KT |
1673 | return -EINVAL; |
1674 | } | |
1675 | ||
1676 | /** | |
059d84db | 1677 | * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list. |
9590837b KT |
1678 | * |
1679 | * @head: Pointer to "struct tomoyo_io_buffer". | |
31845e8c TH |
1680 | * @idx: Index number. |
1681 | * | |
1682 | * Returns true on success, false otherwise. | |
9590837b | 1683 | * |
fdb8ebb7 | 1684 | * Caller holds tomoyo_read_lock(). |
9590837b | 1685 | */ |
31845e8c | 1686 | static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx) |
9590837b | 1687 | { |
bd03a3e4 TH |
1688 | struct tomoyo_policy_namespace *ns = |
1689 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
1690 | struct list_head *list = &ns->group_list[idx]; | |
1691 | list_for_each_cookie(head->r.group, list) { | |
31845e8c | 1692 | struct tomoyo_group *group = |
0df7e8b8 | 1693 | list_entry(head->r.group, typeof(*group), head.list); |
f23571e8 | 1694 | list_for_each_cookie(head->r.acl, &group->member_list) { |
31845e8c | 1695 | struct tomoyo_acl_head *ptr = |
f23571e8 | 1696 | list_entry(head->r.acl, typeof(*ptr), list); |
31845e8c TH |
1697 | if (ptr->is_deleted) |
1698 | continue; | |
f23571e8 TH |
1699 | if (!tomoyo_flush(head)) |
1700 | return false; | |
bd03a3e4 | 1701 | tomoyo_print_namespace(head); |
f23571e8 TH |
1702 | tomoyo_set_string(head, tomoyo_group_name[idx]); |
1703 | tomoyo_set_string(head, group->group_name->name); | |
31845e8c | 1704 | if (idx == TOMOYO_PATH_GROUP) { |
f23571e8 TH |
1705 | tomoyo_set_space(head); |
1706 | tomoyo_set_string(head, container_of | |
1707 | (ptr, struct tomoyo_path_group, | |
1708 | head)->member_name->name); | |
31845e8c | 1709 | } else if (idx == TOMOYO_NUMBER_GROUP) { |
f23571e8 TH |
1710 | tomoyo_print_number_union(head, &container_of |
1711 | (ptr, | |
1712 | struct tomoyo_number_group, | |
1713 | head)->number); | |
059d84db TH |
1714 | } else if (idx == TOMOYO_ADDRESS_GROUP) { |
1715 | char buffer[128]; | |
1716 | ||
1717 | struct tomoyo_address_group *member = | |
1718 | container_of(ptr, typeof(*member), | |
1719 | head); | |
1720 | tomoyo_print_ip(buffer, sizeof(buffer), | |
1721 | &member->address); | |
1722 | tomoyo_io_printf(head, " %s", buffer); | |
31845e8c | 1723 | } |
f23571e8 | 1724 | tomoyo_set_lf(head); |
31845e8c | 1725 | } |
f23571e8 | 1726 | head->r.acl = NULL; |
31845e8c | 1727 | } |
f23571e8 | 1728 | head->r.group = NULL; |
31845e8c TH |
1729 | return true; |
1730 | } | |
1731 | ||
1732 | /** | |
1733 | * tomoyo_read_policy - Read "struct tomoyo_..._entry" list. | |
1734 | * | |
1735 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1736 | * @idx: Index number. | |
1737 | * | |
1738 | * Returns true on success, false otherwise. | |
1739 | * | |
1740 | * Caller holds tomoyo_read_lock(). | |
1741 | */ | |
1742 | static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx) | |
1743 | { | |
bd03a3e4 TH |
1744 | struct tomoyo_policy_namespace *ns = |
1745 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
1746 | struct list_head *list = &ns->policy_list[idx]; | |
1747 | list_for_each_cookie(head->r.acl, list) { | |
475e6fa3 | 1748 | struct tomoyo_acl_head *acl = |
f23571e8 | 1749 | container_of(head->r.acl, typeof(*acl), list); |
31845e8c TH |
1750 | if (acl->is_deleted) |
1751 | continue; | |
f23571e8 TH |
1752 | if (!tomoyo_flush(head)) |
1753 | return false; | |
31845e8c | 1754 | switch (idx) { |
5448ec4f | 1755 | case TOMOYO_ID_TRANSITION_CONTROL: |
31845e8c | 1756 | { |
5448ec4f | 1757 | struct tomoyo_transition_control *ptr = |
31845e8c | 1758 | container_of(acl, typeof(*ptr), head); |
bd03a3e4 | 1759 | tomoyo_print_namespace(head); |
0d2171d7 | 1760 | tomoyo_set_string(head, tomoyo_transition_type |
f23571e8 | 1761 | [ptr->type]); |
0d2171d7 TH |
1762 | tomoyo_set_string(head, ptr->program ? |
1763 | ptr->program->name : "any"); | |
1764 | tomoyo_set_string(head, " from "); | |
1765 | tomoyo_set_string(head, ptr->domainname ? | |
1766 | ptr->domainname->name : | |
1767 | "any"); | |
31845e8c TH |
1768 | } |
1769 | break; | |
31845e8c TH |
1770 | case TOMOYO_ID_AGGREGATOR: |
1771 | { | |
e2bf6907 | 1772 | struct tomoyo_aggregator *ptr = |
31845e8c | 1773 | container_of(acl, typeof(*ptr), head); |
bd03a3e4 | 1774 | tomoyo_print_namespace(head); |
b5bc60b4 | 1775 | tomoyo_set_string(head, "aggregator "); |
f23571e8 TH |
1776 | tomoyo_set_string(head, |
1777 | ptr->original_name->name); | |
1778 | tomoyo_set_space(head); | |
1779 | tomoyo_set_string(head, | |
1780 | ptr->aggregated_name->name); | |
31845e8c TH |
1781 | } |
1782 | break; | |
31845e8c TH |
1783 | default: |
1784 | continue; | |
9590837b | 1785 | } |
f23571e8 | 1786 | tomoyo_set_lf(head); |
9590837b | 1787 | } |
f23571e8 | 1788 | head->r.acl = NULL; |
31845e8c TH |
1789 | return true; |
1790 | } | |
1791 | ||
1792 | /** | |
e2bf6907 | 1793 | * tomoyo_read_exception - Read exception policy. |
31845e8c TH |
1794 | * |
1795 | * @head: Pointer to "struct tomoyo_io_buffer". | |
1796 | * | |
1797 | * Caller holds tomoyo_read_lock(). | |
1798 | */ | |
e2bf6907 | 1799 | static void tomoyo_read_exception(struct tomoyo_io_buffer *head) |
31845e8c | 1800 | { |
bd03a3e4 TH |
1801 | struct tomoyo_policy_namespace *ns = |
1802 | container_of(head->r.ns, typeof(*ns), namespace_list); | |
f23571e8 | 1803 | if (head->r.eof) |
31845e8c | 1804 | return; |
f23571e8 TH |
1805 | while (head->r.step < TOMOYO_MAX_POLICY && |
1806 | tomoyo_read_policy(head, head->r.step)) | |
1807 | head->r.step++; | |
1808 | if (head->r.step < TOMOYO_MAX_POLICY) | |
31845e8c | 1809 | return; |
f23571e8 TH |
1810 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP && |
1811 | tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY)) | |
1812 | head->r.step++; | |
1813 | if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP) | |
31845e8c | 1814 | return; |
32997144 TH |
1815 | while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP |
1816 | + TOMOYO_MAX_ACL_GROUPS) { | |
1817 | head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY | |
1818 | - TOMOYO_MAX_GROUP; | |
bd03a3e4 | 1819 | if (!tomoyo_read_domain2(head, &ns->acl_group |
32997144 TH |
1820 | [head->r.acl_group_index])) |
1821 | return; | |
1822 | head->r.step++; | |
1823 | } | |
f23571e8 | 1824 | head->r.eof = true; |
9590837b KT |
1825 | } |
1826 | ||
eadd99cc | 1827 | /* Wait queue for kernel -> userspace notification. */ |
17fcfbd9 | 1828 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait); |
eadd99cc TH |
1829 | /* Wait queue for userspace -> kernel notification. */ |
1830 | static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait); | |
17fcfbd9 TH |
1831 | |
1832 | /* Structure for query. */ | |
e2bf6907 | 1833 | struct tomoyo_query { |
17fcfbd9 TH |
1834 | struct list_head list; |
1835 | char *query; | |
eadd99cc | 1836 | size_t query_len; |
17fcfbd9 | 1837 | unsigned int serial; |
eadd99cc TH |
1838 | u8 timer; |
1839 | u8 answer; | |
1840 | u8 retry; | |
17fcfbd9 TH |
1841 | }; |
1842 | ||
e2bf6907 | 1843 | /* The list for "struct tomoyo_query". */ |
17fcfbd9 TH |
1844 | static LIST_HEAD(tomoyo_query_list); |
1845 | ||
eadd99cc TH |
1846 | /* Lock for manipulating tomoyo_query_list. */ |
1847 | static DEFINE_SPINLOCK(tomoyo_query_list_lock); | |
1848 | ||
17fcfbd9 TH |
1849 | /* |
1850 | * Number of "struct file" referring /sys/kernel/security/tomoyo/query | |
1851 | * interface. | |
1852 | */ | |
1853 | static atomic_t tomoyo_query_observers = ATOMIC_INIT(0); | |
1854 | ||
2ca9bf45 TH |
1855 | /** |
1856 | * tomoyo_truncate - Truncate a line. | |
1857 | * | |
1858 | * @str: String to truncate. | |
1859 | * | |
1860 | * Returns length of truncated @str. | |
1861 | */ | |
1862 | static int tomoyo_truncate(char *str) | |
1863 | { | |
1864 | char *start = str; | |
1865 | while (*(unsigned char *) str > (unsigned char) ' ') | |
1866 | str++; | |
1867 | *str = '\0'; | |
1868 | return strlen(start) + 1; | |
1869 | } | |
1870 | ||
eadd99cc TH |
1871 | /** |
1872 | * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode. | |
1873 | * | |
1874 | * @domain: Pointer to "struct tomoyo_domain_info". | |
1875 | * @header: Lines containing ACL. | |
1876 | * | |
1877 | * Returns nothing. | |
1878 | */ | |
1879 | static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header) | |
1880 | { | |
1881 | char *buffer; | |
2ca9bf45 | 1882 | char *realpath = NULL; |
5b636857 | 1883 | char *argv0 = NULL; |
2ca9bf45 | 1884 | char *symlink = NULL; |
eadd99cc TH |
1885 | char *cp = strchr(header, '\n'); |
1886 | int len; | |
1887 | if (!cp) | |
1888 | return; | |
1889 | cp = strchr(cp + 1, '\n'); | |
1890 | if (!cp) | |
1891 | return; | |
1892 | *cp++ = '\0'; | |
1893 | len = strlen(cp) + 1; | |
2ca9bf45 TH |
1894 | /* strstr() will return NULL if ordering is wrong. */ |
1895 | if (*cp == 'f') { | |
5b636857 TH |
1896 | argv0 = strstr(header, " argv[]={ \""); |
1897 | if (argv0) { | |
1898 | argv0 += 10; | |
1899 | len += tomoyo_truncate(argv0) + 14; | |
1900 | } | |
2ca9bf45 TH |
1901 | realpath = strstr(header, " exec={ realpath=\""); |
1902 | if (realpath) { | |
1903 | realpath += 8; | |
1904 | len += tomoyo_truncate(realpath) + 6; | |
1905 | } | |
1906 | symlink = strstr(header, " symlink.target=\""); | |
1907 | if (symlink) | |
1908 | len += tomoyo_truncate(symlink + 1) + 1; | |
1909 | } | |
eadd99cc TH |
1910 | buffer = kmalloc(len, GFP_NOFS); |
1911 | if (!buffer) | |
1912 | return; | |
1913 | snprintf(buffer, len - 1, "%s", cp); | |
2ca9bf45 TH |
1914 | if (realpath) |
1915 | tomoyo_addprintf(buffer, len, " exec.%s", realpath); | |
5b636857 TH |
1916 | if (argv0) |
1917 | tomoyo_addprintf(buffer, len, " exec.argv[0]=%s", argv0); | |
2ca9bf45 TH |
1918 | if (symlink) |
1919 | tomoyo_addprintf(buffer, len, "%s", symlink); | |
eadd99cc | 1920 | tomoyo_normalize_line(buffer); |
b22b8b9f TH |
1921 | if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer, |
1922 | false)) | |
1923 | tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES); | |
eadd99cc TH |
1924 | kfree(buffer); |
1925 | } | |
1926 | ||
17fcfbd9 TH |
1927 | /** |
1928 | * tomoyo_supervisor - Ask for the supervisor's decision. | |
1929 | * | |
eadd99cc TH |
1930 | * @r: Pointer to "struct tomoyo_request_info". |
1931 | * @fmt: The printf()'s format string, followed by parameters. | |
17fcfbd9 TH |
1932 | * |
1933 | * Returns 0 if the supervisor decided to permit the access request which | |
1934 | * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the | |
1935 | * supervisor decided to retry the access request which violated the policy in | |
1936 | * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise. | |
1937 | */ | |
1938 | int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...) | |
1939 | { | |
1940 | va_list args; | |
eadd99cc | 1941 | int error; |
17fcfbd9 TH |
1942 | int len; |
1943 | static unsigned int tomoyo_serial; | |
eadd99cc | 1944 | struct tomoyo_query entry = { }; |
17fcfbd9 | 1945 | bool quota_exceeded = false; |
eadd99cc TH |
1946 | va_start(args, fmt); |
1947 | len = vsnprintf((char *) &len, 1, fmt, args) + 1; | |
1948 | va_end(args); | |
1949 | /* Write /sys/kernel/security/tomoyo/audit. */ | |
1950 | va_start(args, fmt); | |
1951 | tomoyo_write_log2(r, len, fmt, args); | |
1952 | va_end(args); | |
1953 | /* Nothing more to do if granted. */ | |
1954 | if (r->granted) | |
1955 | return 0; | |
b22b8b9f TH |
1956 | if (r->mode) |
1957 | tomoyo_update_stat(r->mode); | |
17fcfbd9 | 1958 | switch (r->mode) { |
eadd99cc TH |
1959 | case TOMOYO_CONFIG_ENFORCING: |
1960 | error = -EPERM; | |
1961 | if (atomic_read(&tomoyo_query_observers)) | |
1962 | break; | |
1963 | goto out; | |
17fcfbd9 | 1964 | case TOMOYO_CONFIG_LEARNING: |
eadd99cc TH |
1965 | error = 0; |
1966 | /* Check max_learning_entry parameter. */ | |
1967 | if (tomoyo_domain_quota_is_ok(r)) | |
1968 | break; | |
17fcfbd9 | 1969 | /* fall through */ |
eadd99cc | 1970 | default: |
17fcfbd9 TH |
1971 | return 0; |
1972 | } | |
eadd99cc | 1973 | /* Get message. */ |
17fcfbd9 | 1974 | va_start(args, fmt); |
eadd99cc | 1975 | entry.query = tomoyo_init_log(r, len, fmt, args); |
17fcfbd9 | 1976 | va_end(args); |
eadd99cc | 1977 | if (!entry.query) |
17fcfbd9 | 1978 | goto out; |
eadd99cc TH |
1979 | entry.query_len = strlen(entry.query) + 1; |
1980 | if (!error) { | |
1981 | tomoyo_add_entry(r->domain, entry.query); | |
17fcfbd9 | 1982 | goto out; |
eadd99cc TH |
1983 | } |
1984 | len = tomoyo_round2(entry.query_len); | |
17fcfbd9 | 1985 | spin_lock(&tomoyo_query_list_lock); |
eadd99cc TH |
1986 | if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] && |
1987 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len | |
1988 | >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) { | |
17fcfbd9 TH |
1989 | quota_exceeded = true; |
1990 | } else { | |
eadd99cc TH |
1991 | entry.serial = tomoyo_serial++; |
1992 | entry.retry = r->retry; | |
1993 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len; | |
1994 | list_add_tail(&entry.list, &tomoyo_query_list); | |
17fcfbd9 TH |
1995 | } |
1996 | spin_unlock(&tomoyo_query_list_lock); | |
1997 | if (quota_exceeded) | |
1998 | goto out; | |
17fcfbd9 | 1999 | /* Give 10 seconds for supervisor's opinion. */ |
eadd99cc TH |
2000 | while (entry.timer < 10) { |
2001 | wake_up_all(&tomoyo_query_wait); | |
2002 | if (wait_event_interruptible_timeout | |
2003 | (tomoyo_answer_wait, entry.answer || | |
2004 | !atomic_read(&tomoyo_query_observers), HZ)) | |
17fcfbd9 | 2005 | break; |
eadd99cc TH |
2006 | else |
2007 | entry.timer++; | |
17fcfbd9 TH |
2008 | } |
2009 | spin_lock(&tomoyo_query_list_lock); | |
eadd99cc TH |
2010 | list_del(&entry.list); |
2011 | tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len; | |
17fcfbd9 | 2012 | spin_unlock(&tomoyo_query_list_lock); |
eadd99cc | 2013 | switch (entry.answer) { |
17fcfbd9 TH |
2014 | case 3: /* Asked to retry by administrator. */ |
2015 | error = TOMOYO_RETRY_REQUEST; | |
2016 | r->retry++; | |
2017 | break; | |
2018 | case 1: | |
2019 | /* Granted by administrator. */ | |
2020 | error = 0; | |
2021 | break; | |
17fcfbd9 | 2022 | default: |
eadd99cc | 2023 | /* Timed out or rejected by administrator. */ |
17fcfbd9 TH |
2024 | break; |
2025 | } | |
eadd99cc TH |
2026 | out: |
2027 | kfree(entry.query); | |
17fcfbd9 TH |
2028 | return error; |
2029 | } | |
2030 | ||
2031 | /** | |
2032 | * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query. | |
2033 | * | |
2034 | * @file: Pointer to "struct file". | |
2035 | * @wait: Pointer to "poll_table". | |
2036 | * | |
2037 | * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise. | |
2038 | * | |
2039 | * Waits for access requests which violated policy in enforcing mode. | |
2040 | */ | |
2041 | static int tomoyo_poll_query(struct file *file, poll_table *wait) | |
2042 | { | |
2043 | struct list_head *tmp; | |
2044 | bool found = false; | |
2045 | u8 i; | |
2046 | for (i = 0; i < 2; i++) { | |
2047 | spin_lock(&tomoyo_query_list_lock); | |
2048 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 TH |
2049 | struct tomoyo_query *ptr = |
2050 | list_entry(tmp, typeof(*ptr), list); | |
17fcfbd9 TH |
2051 | if (ptr->answer) |
2052 | continue; | |
2053 | found = true; | |
2054 | break; | |
2055 | } | |
2056 | spin_unlock(&tomoyo_query_list_lock); | |
2057 | if (found) | |
2058 | return POLLIN | POLLRDNORM; | |
2059 | if (i) | |
2060 | break; | |
2061 | poll_wait(file, &tomoyo_query_wait, wait); | |
2062 | } | |
2063 | return 0; | |
2064 | } | |
2065 | ||
2066 | /** | |
2067 | * tomoyo_read_query - Read access requests which violated policy in enforcing mode. | |
2068 | * | |
2069 | * @head: Pointer to "struct tomoyo_io_buffer". | |
17fcfbd9 | 2070 | */ |
8fbe71f0 | 2071 | static void tomoyo_read_query(struct tomoyo_io_buffer *head) |
17fcfbd9 TH |
2072 | { |
2073 | struct list_head *tmp; | |
2c47ab93 TH |
2074 | unsigned int pos = 0; |
2075 | size_t len = 0; | |
17fcfbd9 | 2076 | char *buf; |
f23571e8 | 2077 | if (head->r.w_pos) |
8fbe71f0 | 2078 | return; |
17fcfbd9 TH |
2079 | if (head->read_buf) { |
2080 | kfree(head->read_buf); | |
2081 | head->read_buf = NULL; | |
17fcfbd9 TH |
2082 | } |
2083 | spin_lock(&tomoyo_query_list_lock); | |
2084 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 2085 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
17fcfbd9 TH |
2086 | if (ptr->answer) |
2087 | continue; | |
f23571e8 | 2088 | if (pos++ != head->r.query_index) |
17fcfbd9 TH |
2089 | continue; |
2090 | len = ptr->query_len; | |
2091 | break; | |
2092 | } | |
2093 | spin_unlock(&tomoyo_query_list_lock); | |
2094 | if (!len) { | |
f23571e8 | 2095 | head->r.query_index = 0; |
8fbe71f0 | 2096 | return; |
17fcfbd9 | 2097 | } |
eadd99cc | 2098 | buf = kzalloc(len + 32, GFP_NOFS); |
17fcfbd9 | 2099 | if (!buf) |
8fbe71f0 | 2100 | return; |
17fcfbd9 TH |
2101 | pos = 0; |
2102 | spin_lock(&tomoyo_query_list_lock); | |
2103 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 2104 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
17fcfbd9 TH |
2105 | if (ptr->answer) |
2106 | continue; | |
f23571e8 | 2107 | if (pos++ != head->r.query_index) |
17fcfbd9 TH |
2108 | continue; |
2109 | /* | |
2110 | * Some query can be skipped because tomoyo_query_list | |
2111 | * can change, but I don't care. | |
2112 | */ | |
2113 | if (len == ptr->query_len) | |
eadd99cc TH |
2114 | snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial, |
2115 | ptr->retry, ptr->query); | |
17fcfbd9 TH |
2116 | break; |
2117 | } | |
2118 | spin_unlock(&tomoyo_query_list_lock); | |
2119 | if (buf[0]) { | |
17fcfbd9 | 2120 | head->read_buf = buf; |
f23571e8 TH |
2121 | head->r.w[head->r.w_pos++] = buf; |
2122 | head->r.query_index++; | |
17fcfbd9 TH |
2123 | } else { |
2124 | kfree(buf); | |
2125 | } | |
17fcfbd9 TH |
2126 | } |
2127 | ||
2128 | /** | |
2129 | * tomoyo_write_answer - Write the supervisor's decision. | |
2130 | * | |
2131 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2132 | * | |
2133 | * Returns 0 on success, -EINVAL otherwise. | |
2134 | */ | |
2135 | static int tomoyo_write_answer(struct tomoyo_io_buffer *head) | |
2136 | { | |
2137 | char *data = head->write_buf; | |
2138 | struct list_head *tmp; | |
2139 | unsigned int serial; | |
2140 | unsigned int answer; | |
2141 | spin_lock(&tomoyo_query_list_lock); | |
2142 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 2143 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
17fcfbd9 TH |
2144 | ptr->timer = 0; |
2145 | } | |
2146 | spin_unlock(&tomoyo_query_list_lock); | |
2147 | if (sscanf(data, "A%u=%u", &serial, &answer) != 2) | |
2148 | return -EINVAL; | |
2149 | spin_lock(&tomoyo_query_list_lock); | |
2150 | list_for_each(tmp, &tomoyo_query_list) { | |
e2bf6907 | 2151 | struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list); |
17fcfbd9 TH |
2152 | if (ptr->serial != serial) |
2153 | continue; | |
2154 | if (!ptr->answer) | |
2155 | ptr->answer = answer; | |
2156 | break; | |
2157 | } | |
2158 | spin_unlock(&tomoyo_query_list_lock); | |
2159 | return 0; | |
2160 | } | |
2161 | ||
9590837b KT |
2162 | /** |
2163 | * tomoyo_read_version: Get version. | |
2164 | * | |
2165 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2166 | * | |
2167 | * Returns version information. | |
2168 | */ | |
8fbe71f0 | 2169 | static void tomoyo_read_version(struct tomoyo_io_buffer *head) |
9590837b | 2170 | { |
f23571e8 | 2171 | if (!head->r.eof) { |
d5ca1725 | 2172 | tomoyo_io_printf(head, "2.4.0"); |
f23571e8 | 2173 | head->r.eof = true; |
9590837b | 2174 | } |
9590837b KT |
2175 | } |
2176 | ||
2177 | /** | |
2178 | * tomoyo_read_self_domain - Get the current process's domainname. | |
2179 | * | |
2180 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2181 | * | |
2182 | * Returns the current process's domainname. | |
2183 | */ | |
8fbe71f0 | 2184 | static void tomoyo_read_self_domain(struct tomoyo_io_buffer *head) |
9590837b | 2185 | { |
f23571e8 | 2186 | if (!head->r.eof) { |
9590837b KT |
2187 | /* |
2188 | * tomoyo_domain()->domainname != NULL | |
2189 | * because every process belongs to a domain and | |
2190 | * the domain's name cannot be NULL. | |
2191 | */ | |
2192 | tomoyo_io_printf(head, "%s", tomoyo_domain()->domainname->name); | |
f23571e8 | 2193 | head->r.eof = true; |
9590837b | 2194 | } |
9590837b KT |
2195 | } |
2196 | ||
b22b8b9f TH |
2197 | /* String table for /sys/kernel/security/tomoyo/stat interface. */ |
2198 | static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = { | |
2199 | [TOMOYO_STAT_POLICY_UPDATES] = "update:", | |
2200 | [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:", | |
2201 | [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:", | |
2202 | [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:", | |
2203 | }; | |
2204 | ||
2205 | /* String table for /sys/kernel/security/tomoyo/stat interface. */ | |
2206 | static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = { | |
2207 | [TOMOYO_MEMORY_POLICY] = "policy:", | |
2208 | [TOMOYO_MEMORY_AUDIT] = "audit log:", | |
2209 | [TOMOYO_MEMORY_QUERY] = "query message:", | |
2210 | }; | |
2211 | ||
2212 | /* Timestamp counter for last updated. */ | |
2213 | static unsigned int tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT]; | |
2214 | /* Counter for number of updates. */ | |
2215 | static unsigned int tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT]; | |
2216 | ||
2217 | /** | |
2218 | * tomoyo_update_stat - Update statistic counters. | |
2219 | * | |
2220 | * @index: Index for policy type. | |
2221 | * | |
2222 | * Returns nothing. | |
2223 | */ | |
2224 | void tomoyo_update_stat(const u8 index) | |
2225 | { | |
2226 | struct timeval tv; | |
2227 | do_gettimeofday(&tv); | |
2228 | /* | |
2229 | * I don't use atomic operations because race condition is not fatal. | |
2230 | */ | |
2231 | tomoyo_stat_updated[index]++; | |
2232 | tomoyo_stat_modified[index] = tv.tv_sec; | |
2233 | } | |
2234 | ||
2235 | /** | |
2236 | * tomoyo_read_stat - Read statistic data. | |
2237 | * | |
2238 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2239 | * | |
2240 | * Returns nothing. | |
2241 | */ | |
2242 | static void tomoyo_read_stat(struct tomoyo_io_buffer *head) | |
2243 | { | |
2244 | u8 i; | |
2245 | unsigned int total = 0; | |
2246 | if (head->r.eof) | |
2247 | return; | |
2248 | for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) { | |
2249 | tomoyo_io_printf(head, "Policy %-30s %10u", | |
2250 | tomoyo_policy_headers[i], | |
2251 | tomoyo_stat_updated[i]); | |
2252 | if (tomoyo_stat_modified[i]) { | |
2253 | struct tomoyo_time stamp; | |
2254 | tomoyo_convert_time(tomoyo_stat_modified[i], &stamp); | |
2255 | tomoyo_io_printf(head, " (Last: %04u/%02u/%02u " | |
2256 | "%02u:%02u:%02u)", | |
2257 | stamp.year, stamp.month, stamp.day, | |
2258 | stamp.hour, stamp.min, stamp.sec); | |
2259 | } | |
2260 | tomoyo_set_lf(head); | |
2261 | } | |
2262 | for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) { | |
2263 | unsigned int used = tomoyo_memory_used[i]; | |
2264 | total += used; | |
2265 | tomoyo_io_printf(head, "Memory used by %-22s %10u", | |
2266 | tomoyo_memory_headers[i], used); | |
2267 | used = tomoyo_memory_quota[i]; | |
2268 | if (used) | |
2269 | tomoyo_io_printf(head, " (Quota: %10u)", used); | |
2270 | tomoyo_set_lf(head); | |
2271 | } | |
2272 | tomoyo_io_printf(head, "Total memory used: %10u\n", | |
2273 | total); | |
2274 | head->r.eof = true; | |
2275 | } | |
2276 | ||
2277 | /** | |
2278 | * tomoyo_write_stat - Set memory quota. | |
2279 | * | |
2280 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2281 | * | |
2282 | * Returns 0. | |
2283 | */ | |
2284 | static int tomoyo_write_stat(struct tomoyo_io_buffer *head) | |
2285 | { | |
2286 | char *data = head->write_buf; | |
2287 | u8 i; | |
2288 | if (tomoyo_str_starts(&data, "Memory used by ")) | |
2289 | for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) | |
2290 | if (tomoyo_str_starts(&data, tomoyo_memory_headers[i])) | |
2291 | sscanf(data, "%u", &tomoyo_memory_quota[i]); | |
2292 | return 0; | |
2293 | } | |
2294 | ||
9590837b KT |
2295 | /** |
2296 | * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface. | |
2297 | * | |
2298 | * @type: Type of interface. | |
2299 | * @file: Pointer to "struct file". | |
2300 | * | |
2e503bbb | 2301 | * Returns 0 on success, negative value otherwise. |
9590837b | 2302 | */ |
c3ef1500 | 2303 | int tomoyo_open_control(const u8 type, struct file *file) |
9590837b | 2304 | { |
4e5d6f7e | 2305 | struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS); |
9590837b KT |
2306 | |
2307 | if (!head) | |
2308 | return -ENOMEM; | |
2309 | mutex_init(&head->io_sem); | |
17fcfbd9 | 2310 | head->type = type; |
9590837b KT |
2311 | switch (type) { |
2312 | case TOMOYO_DOMAINPOLICY: | |
2313 | /* /sys/kernel/security/tomoyo/domain_policy */ | |
e2bf6907 TH |
2314 | head->write = tomoyo_write_domain; |
2315 | head->read = tomoyo_read_domain; | |
9590837b KT |
2316 | break; |
2317 | case TOMOYO_EXCEPTIONPOLICY: | |
2318 | /* /sys/kernel/security/tomoyo/exception_policy */ | |
e2bf6907 TH |
2319 | head->write = tomoyo_write_exception; |
2320 | head->read = tomoyo_read_exception; | |
9590837b | 2321 | break; |
eadd99cc TH |
2322 | case TOMOYO_AUDIT: |
2323 | /* /sys/kernel/security/tomoyo/audit */ | |
2324 | head->poll = tomoyo_poll_log; | |
2325 | head->read = tomoyo_read_log; | |
2326 | break; | |
9590837b KT |
2327 | case TOMOYO_SELFDOMAIN: |
2328 | /* /sys/kernel/security/tomoyo/self_domain */ | |
2329 | head->read = tomoyo_read_self_domain; | |
2330 | break; | |
9590837b KT |
2331 | case TOMOYO_PROCESS_STATUS: |
2332 | /* /sys/kernel/security/tomoyo/.process_status */ | |
2333 | head->write = tomoyo_write_pid; | |
2334 | head->read = tomoyo_read_pid; | |
2335 | break; | |
2336 | case TOMOYO_VERSION: | |
2337 | /* /sys/kernel/security/tomoyo/version */ | |
2338 | head->read = tomoyo_read_version; | |
2339 | head->readbuf_size = 128; | |
2340 | break; | |
b22b8b9f TH |
2341 | case TOMOYO_STAT: |
2342 | /* /sys/kernel/security/tomoyo/stat */ | |
2343 | head->write = tomoyo_write_stat; | |
2344 | head->read = tomoyo_read_stat; | |
2345 | head->readbuf_size = 1024; | |
9590837b KT |
2346 | break; |
2347 | case TOMOYO_PROFILE: | |
2348 | /* /sys/kernel/security/tomoyo/profile */ | |
2349 | head->write = tomoyo_write_profile; | |
2350 | head->read = tomoyo_read_profile; | |
2351 | break; | |
17fcfbd9 TH |
2352 | case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */ |
2353 | head->poll = tomoyo_poll_query; | |
2354 | head->write = tomoyo_write_answer; | |
2355 | head->read = tomoyo_read_query; | |
2356 | break; | |
9590837b KT |
2357 | case TOMOYO_MANAGER: |
2358 | /* /sys/kernel/security/tomoyo/manager */ | |
e2bf6907 TH |
2359 | head->write = tomoyo_write_manager; |
2360 | head->read = tomoyo_read_manager; | |
9590837b KT |
2361 | break; |
2362 | } | |
2363 | if (!(file->f_mode & FMODE_READ)) { | |
2364 | /* | |
2365 | * No need to allocate read_buf since it is not opened | |
2366 | * for reading. | |
2367 | */ | |
2368 | head->read = NULL; | |
17fcfbd9 TH |
2369 | head->poll = NULL; |
2370 | } else if (!head->poll) { | |
2371 | /* Don't allocate read_buf for poll() access. */ | |
9590837b KT |
2372 | if (!head->readbuf_size) |
2373 | head->readbuf_size = 4096 * 2; | |
4e5d6f7e | 2374 | head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS); |
9590837b | 2375 | if (!head->read_buf) { |
8e2d39a1 | 2376 | kfree(head); |
9590837b KT |
2377 | return -ENOMEM; |
2378 | } | |
2379 | } | |
2380 | if (!(file->f_mode & FMODE_WRITE)) { | |
2381 | /* | |
2382 | * No need to allocate write_buf since it is not opened | |
2383 | * for writing. | |
2384 | */ | |
2385 | head->write = NULL; | |
2386 | } else if (head->write) { | |
2387 | head->writebuf_size = 4096 * 2; | |
4e5d6f7e | 2388 | head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS); |
9590837b | 2389 | if (!head->write_buf) { |
8e2d39a1 TH |
2390 | kfree(head->read_buf); |
2391 | kfree(head); | |
9590837b KT |
2392 | return -ENOMEM; |
2393 | } | |
2394 | } | |
17fcfbd9 TH |
2395 | /* |
2396 | * If the file is /sys/kernel/security/tomoyo/query , increment the | |
2397 | * observer counter. | |
2398 | * The obserber counter is used by tomoyo_supervisor() to see if | |
2399 | * there is some process monitoring /sys/kernel/security/tomoyo/query. | |
2400 | */ | |
7c75964f | 2401 | if (type == TOMOYO_QUERY) |
17fcfbd9 | 2402 | atomic_inc(&tomoyo_query_observers); |
2e503bbb TH |
2403 | file->private_data = head; |
2404 | tomoyo_notify_gc(head, true); | |
9590837b KT |
2405 | return 0; |
2406 | } | |
2407 | ||
0849e3ba TH |
2408 | /** |
2409 | * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface. | |
2410 | * | |
2411 | * @file: Pointer to "struct file". | |
2412 | * @wait: Pointer to "poll_table". | |
2413 | * | |
2414 | * Waits for read readiness. | |
eadd99cc TH |
2415 | * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd and |
2416 | * /sys/kernel/security/tomoyo/audit is handled by /usr/sbin/tomoyo-auditd. | |
0849e3ba TH |
2417 | */ |
2418 | int tomoyo_poll_control(struct file *file, poll_table *wait) | |
2419 | { | |
2420 | struct tomoyo_io_buffer *head = file->private_data; | |
2421 | if (!head->poll) | |
2422 | return -ENOSYS; | |
2423 | return head->poll(file, wait); | |
2424 | } | |
2425 | ||
bd03a3e4 TH |
2426 | /** |
2427 | * tomoyo_set_namespace_cursor - Set namespace to read. | |
2428 | * | |
2429 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2430 | * | |
2431 | * Returns nothing. | |
2432 | */ | |
2433 | static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head) | |
2434 | { | |
2435 | struct list_head *ns; | |
2436 | if (head->type != TOMOYO_EXCEPTIONPOLICY && | |
2437 | head->type != TOMOYO_PROFILE) | |
2438 | return; | |
2439 | /* | |
2440 | * If this is the first read, or reading previous namespace finished | |
2441 | * and has more namespaces to read, update the namespace cursor. | |
2442 | */ | |
2443 | ns = head->r.ns; | |
2444 | if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) { | |
2445 | /* Clearing is OK because tomoyo_flush() returned true. */ | |
2446 | memset(&head->r, 0, sizeof(head->r)); | |
2447 | head->r.ns = ns ? ns->next : tomoyo_namespace_list.next; | |
2448 | } | |
2449 | } | |
2450 | ||
2451 | /** | |
2452 | * tomoyo_has_more_namespace - Check for unread namespaces. | |
2453 | * | |
2454 | * @head: Pointer to "struct tomoyo_io_buffer". | |
2455 | * | |
2456 | * Returns true if we have more entries to print, false otherwise. | |
2457 | */ | |
2458 | static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head) | |
2459 | { | |
2460 | return (head->type == TOMOYO_EXCEPTIONPOLICY || | |
2461 | head->type == TOMOYO_PROFILE) && head->r.eof && | |
2462 | head->r.ns->next != &tomoyo_namespace_list; | |
2463 | } | |
2464 | ||
9590837b KT |
2465 | /** |
2466 | * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface. | |
2467 | * | |
0df7e8b8 | 2468 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b KT |
2469 | * @buffer: Poiner to buffer to write to. |
2470 | * @buffer_len: Size of @buffer. | |
2471 | * | |
2472 | * Returns bytes read on success, negative value otherwise. | |
2473 | */ | |
2c47ab93 TH |
2474 | ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer, |
2475 | const int buffer_len) | |
9590837b | 2476 | { |
f23571e8 | 2477 | int len; |
2e503bbb | 2478 | int idx; |
9590837b KT |
2479 | |
2480 | if (!head->read) | |
2481 | return -ENOSYS; | |
2482 | if (mutex_lock_interruptible(&head->io_sem)) | |
2483 | return -EINTR; | |
f23571e8 TH |
2484 | head->read_user_buf = buffer; |
2485 | head->read_user_buf_avail = buffer_len; | |
2e503bbb | 2486 | idx = tomoyo_read_lock(); |
f23571e8 TH |
2487 | if (tomoyo_flush(head)) |
2488 | /* Call the policy handler. */ | |
bd03a3e4 TH |
2489 | do { |
2490 | tomoyo_set_namespace_cursor(head); | |
2491 | head->read(head); | |
2492 | } while (tomoyo_flush(head) && | |
2493 | tomoyo_has_more_namespace(head)); | |
2e503bbb | 2494 | tomoyo_read_unlock(idx); |
f23571e8 | 2495 | len = head->read_user_buf - buffer; |
9590837b KT |
2496 | mutex_unlock(&head->io_sem); |
2497 | return len; | |
2498 | } | |
2499 | ||
bd03a3e4 TH |
2500 | /** |
2501 | * tomoyo_parse_policy - Parse a policy line. | |
2502 | * | |
2503 | * @head: Poiter to "struct tomoyo_io_buffer". | |
2504 | * @line: Line to parse. | |
2505 | * | |
2506 | * Returns 0 on success, negative value otherwise. | |
2507 | * | |
2508 | * Caller holds tomoyo_read_lock(). | |
2509 | */ | |
2510 | static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line) | |
2511 | { | |
2512 | /* Delete request? */ | |
2513 | head->w.is_delete = !strncmp(line, "delete ", 7); | |
2514 | if (head->w.is_delete) | |
2515 | memmove(line, line + 7, strlen(line + 7) + 1); | |
2516 | /* Selecting namespace to update. */ | |
2517 | if (head->type == TOMOYO_EXCEPTIONPOLICY || | |
2518 | head->type == TOMOYO_PROFILE) { | |
2519 | if (*line == '<') { | |
2520 | char *cp = strchr(line, ' '); | |
2521 | if (cp) { | |
2522 | *cp++ = '\0'; | |
2523 | head->w.ns = tomoyo_assign_namespace(line); | |
2524 | memmove(line, cp, strlen(cp) + 1); | |
2525 | } else | |
2526 | head->w.ns = NULL; | |
2527 | } else | |
2528 | head->w.ns = &tomoyo_kernel_namespace; | |
2529 | /* Don't allow updating if namespace is invalid. */ | |
2530 | if (!head->w.ns) | |
2531 | return -ENOENT; | |
2532 | } | |
2533 | /* Do the update. */ | |
2534 | return head->write(head); | |
2535 | } | |
2536 | ||
9590837b KT |
2537 | /** |
2538 | * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface. | |
2539 | * | |
0df7e8b8 | 2540 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b KT |
2541 | * @buffer: Pointer to buffer to read from. |
2542 | * @buffer_len: Size of @buffer. | |
2543 | * | |
2544 | * Returns @buffer_len on success, negative value otherwise. | |
2545 | */ | |
2c47ab93 TH |
2546 | ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head, |
2547 | const char __user *buffer, const int buffer_len) | |
9590837b | 2548 | { |
9590837b | 2549 | int error = buffer_len; |
bd03a3e4 | 2550 | size_t avail_len = buffer_len; |
9590837b | 2551 | char *cp0 = head->write_buf; |
2e503bbb | 2552 | int idx; |
9590837b KT |
2553 | if (!head->write) |
2554 | return -ENOSYS; | |
2555 | if (!access_ok(VERIFY_READ, buffer, buffer_len)) | |
2556 | return -EFAULT; | |
9590837b KT |
2557 | if (mutex_lock_interruptible(&head->io_sem)) |
2558 | return -EINTR; | |
2e503bbb | 2559 | idx = tomoyo_read_lock(); |
9590837b KT |
2560 | /* Read a line and dispatch it to the policy handler. */ |
2561 | while (avail_len > 0) { | |
2562 | char c; | |
0df7e8b8 | 2563 | if (head->w.avail >= head->writebuf_size - 1) { |
bd03a3e4 TH |
2564 | const int len = head->writebuf_size * 2; |
2565 | char *cp = kzalloc(len, GFP_NOFS); | |
2566 | if (!cp) { | |
2567 | error = -ENOMEM; | |
2568 | break; | |
2569 | } | |
2570 | memmove(cp, cp0, head->w.avail); | |
2571 | kfree(cp0); | |
2572 | head->write_buf = cp; | |
2573 | cp0 = cp; | |
2574 | head->writebuf_size = len; | |
2575 | } | |
2576 | if (get_user(c, buffer)) { | |
9590837b KT |
2577 | error = -EFAULT; |
2578 | break; | |
2579 | } | |
2580 | buffer++; | |
2581 | avail_len--; | |
0df7e8b8 | 2582 | cp0[head->w.avail++] = c; |
9590837b KT |
2583 | if (c != '\n') |
2584 | continue; | |
0df7e8b8 TH |
2585 | cp0[head->w.avail - 1] = '\0'; |
2586 | head->w.avail = 0; | |
9590837b | 2587 | tomoyo_normalize_line(cp0); |
bd03a3e4 TH |
2588 | if (!strcmp(cp0, "reset")) { |
2589 | head->w.ns = &tomoyo_kernel_namespace; | |
2590 | head->w.domain = NULL; | |
2591 | memset(&head->r, 0, sizeof(head->r)); | |
2592 | continue; | |
2593 | } | |
2594 | /* Don't allow updating policies by non manager programs. */ | |
2595 | switch (head->type) { | |
2596 | case TOMOYO_PROCESS_STATUS: | |
2597 | /* This does not write anything. */ | |
2598 | break; | |
2599 | case TOMOYO_DOMAINPOLICY: | |
2600 | if (tomoyo_select_domain(head, cp0)) | |
2601 | continue; | |
2602 | /* fall through */ | |
2603 | case TOMOYO_EXCEPTIONPOLICY: | |
2604 | if (!strcmp(cp0, "select transition_only")) { | |
2605 | head->r.print_transition_related_only = true; | |
2606 | continue; | |
2607 | } | |
2608 | /* fall through */ | |
2609 | default: | |
2610 | if (!tomoyo_manager()) { | |
2611 | error = -EPERM; | |
2612 | goto out; | |
2613 | } | |
2614 | } | |
2615 | switch (tomoyo_parse_policy(head, cp0)) { | |
2616 | case -EPERM: | |
2617 | error = -EPERM; | |
2618 | goto out; | |
b22b8b9f TH |
2619 | case 0: |
2620 | switch (head->type) { | |
2621 | case TOMOYO_DOMAINPOLICY: | |
2622 | case TOMOYO_EXCEPTIONPOLICY: | |
b22b8b9f TH |
2623 | case TOMOYO_STAT: |
2624 | case TOMOYO_PROFILE: | |
2625 | case TOMOYO_MANAGER: | |
2626 | tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES); | |
2627 | break; | |
2628 | default: | |
2629 | break; | |
2630 | } | |
2631 | break; | |
bd03a3e4 | 2632 | } |
9590837b | 2633 | } |
bd03a3e4 | 2634 | out: |
2e503bbb | 2635 | tomoyo_read_unlock(idx); |
9590837b KT |
2636 | mutex_unlock(&head->io_sem); |
2637 | return error; | |
2638 | } | |
2639 | ||
2640 | /** | |
2641 | * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface. | |
2642 | * | |
0df7e8b8 | 2643 | * @head: Pointer to "struct tomoyo_io_buffer". |
9590837b | 2644 | * |
2e503bbb | 2645 | * Returns 0. |
9590837b | 2646 | */ |
0df7e8b8 | 2647 | int tomoyo_close_control(struct tomoyo_io_buffer *head) |
9590837b | 2648 | { |
17fcfbd9 TH |
2649 | /* |
2650 | * If the file is /sys/kernel/security/tomoyo/query , decrement the | |
2651 | * observer counter. | |
2652 | */ | |
2e503bbb TH |
2653 | if (head->type == TOMOYO_QUERY && |
2654 | atomic_dec_and_test(&tomoyo_query_observers)) | |
2655 | wake_up_all(&tomoyo_answer_wait); | |
2656 | tomoyo_notify_gc(head, false); | |
9590837b KT |
2657 | return 0; |
2658 | } | |
2659 | ||
9590837b | 2660 | /** |
c3ef1500 | 2661 | * tomoyo_check_profile - Check all profiles currently assigned to domains are defined. |
9590837b | 2662 | */ |
c3ef1500 | 2663 | void tomoyo_check_profile(void) |
9590837b | 2664 | { |
c3ef1500 TH |
2665 | struct tomoyo_domain_info *domain; |
2666 | const int idx = tomoyo_read_lock(); | |
2667 | tomoyo_policy_loaded = true; | |
bd03a3e4 | 2668 | printk(KERN_INFO "TOMOYO: 2.4.0\n"); |
c3ef1500 TH |
2669 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
2670 | const u8 profile = domain->profile; | |
bd03a3e4 TH |
2671 | const struct tomoyo_policy_namespace *ns = domain->ns; |
2672 | if (ns->profile_version != 20100903) | |
2673 | printk(KERN_ERR | |
2674 | "Profile version %u is not supported.\n", | |
2675 | ns->profile_version); | |
2676 | else if (!ns->profile_ptr[profile]) | |
2677 | printk(KERN_ERR | |
2678 | "Profile %u (used by '%s') is not defined.\n", | |
2679 | profile, domain->domainname->name); | |
2680 | else | |
c3ef1500 | 2681 | continue; |
bd03a3e4 TH |
2682 | printk(KERN_ERR |
2683 | "Userland tools for TOMOYO 2.4 must be installed and " | |
2684 | "policy must be initialized.\n"); | |
2685 | printk(KERN_ERR "Please see http://tomoyo.sourceforge.jp/2.4/ " | |
9f1c1d42 | 2686 | "for more information.\n"); |
bd03a3e4 | 2687 | panic("STOP!"); |
c3ef1500 TH |
2688 | } |
2689 | tomoyo_read_unlock(idx); | |
c3ef1500 | 2690 | printk(KERN_INFO "Mandatory Access Control activated.\n"); |
9590837b | 2691 | } |
efe836ab TH |
2692 | |
2693 | /** | |
2694 | * tomoyo_load_builtin_policy - Load built-in policy. | |
2695 | * | |
2696 | * Returns nothing. | |
2697 | */ | |
2698 | void __init tomoyo_load_builtin_policy(void) | |
2699 | { | |
2700 | /* | |
2701 | * This include file is manually created and contains built-in policy | |
2702 | * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy", | |
2703 | * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager", | |
2704 | * "tomoyo_builtin_stat" in the form of "static char [] __initdata". | |
2705 | */ | |
2706 | #include "builtin-policy.h" | |
2707 | u8 i; | |
2708 | const int idx = tomoyo_read_lock(); | |
2709 | for (i = 0; i < 5; i++) { | |
2710 | struct tomoyo_io_buffer head = { }; | |
2711 | char *start = ""; | |
2712 | switch (i) { | |
2713 | case 0: | |
2714 | start = tomoyo_builtin_profile; | |
2715 | head.type = TOMOYO_PROFILE; | |
2716 | head.write = tomoyo_write_profile; | |
2717 | break; | |
2718 | case 1: | |
2719 | start = tomoyo_builtin_exception_policy; | |
2720 | head.type = TOMOYO_EXCEPTIONPOLICY; | |
2721 | head.write = tomoyo_write_exception; | |
2722 | break; | |
2723 | case 2: | |
2724 | start = tomoyo_builtin_domain_policy; | |
2725 | head.type = TOMOYO_DOMAINPOLICY; | |
2726 | head.write = tomoyo_write_domain; | |
2727 | break; | |
2728 | case 3: | |
2729 | start = tomoyo_builtin_manager; | |
2730 | head.type = TOMOYO_MANAGER; | |
2731 | head.write = tomoyo_write_manager; | |
2732 | break; | |
2733 | case 4: | |
2734 | start = tomoyo_builtin_stat; | |
2735 | head.type = TOMOYO_STAT; | |
2736 | head.write = tomoyo_write_stat; | |
2737 | break; | |
2738 | } | |
2739 | while (1) { | |
2740 | char *end = strchr(start, '\n'); | |
2741 | if (!end) | |
2742 | break; | |
2743 | *end = '\0'; | |
2744 | tomoyo_normalize_line(start); | |
2745 | head.write_buf = start; | |
2746 | tomoyo_parse_policy(&head, start); | |
2747 | start = end + 1; | |
2748 | } | |
2749 | } | |
2750 | tomoyo_read_unlock(idx); | |
0e4ae0e0 TH |
2751 | #ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER |
2752 | tomoyo_check_profile(); | |
2753 | #endif | |
efe836ab | 2754 | } |