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Merge tag 'selinux-pr-20210923' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-block.git] / security / tomoyo / common.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
9590837b
KT		 2/*
3 * security/tomoyo/common.c
4 *
0f2a55d5 5 * Copyright (C) 2005-2011 NTT DATA CORPORATION
9590837b
KT		 6 */
7
8#include <linux/uaccess.h>
5a0e3ad6 9#include <linux/slab.h>
9590837b 10#include <linux/security.h>
9590837b 11#include "common.h"
9590837b 12
eadd99cc
TH		 13/* String table for operation mode. */
14const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = {
15 [TOMOYO_CONFIG_DISABLED] = "disabled",
16 [TOMOYO_CONFIG_LEARNING] = "learning",
17 [TOMOYO_CONFIG_PERMISSIVE] = "permissive",
18 [TOMOYO_CONFIG_ENFORCING] = "enforcing"
9590837b 19};
9590837b 20
57c2590f 21/* String table for /sys/kernel/security/tomoyo/profile */
2c47ab93 22const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
57c2590f 23 + TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
d58e0da8 24 /* CONFIG::file group */
2c47ab93
TH		 25 [TOMOYO_MAC_FILE_EXECUTE] = "execute",
26 [TOMOYO_MAC_FILE_OPEN] = "open",
27 [TOMOYO_MAC_FILE_CREATE] = "create",
28 [TOMOYO_MAC_FILE_UNLINK] = "unlink",
29 [TOMOYO_MAC_FILE_GETATTR] = "getattr",
30 [TOMOYO_MAC_FILE_MKDIR] = "mkdir",
31 [TOMOYO_MAC_FILE_RMDIR] = "rmdir",
32 [TOMOYO_MAC_FILE_MKFIFO] = "mkfifo",
33 [TOMOYO_MAC_FILE_MKSOCK] = "mksock",
34 [TOMOYO_MAC_FILE_TRUNCATE] = "truncate",
35 [TOMOYO_MAC_FILE_SYMLINK] = "symlink",
36 [TOMOYO_MAC_FILE_MKBLOCK] = "mkblock",
37 [TOMOYO_MAC_FILE_MKCHAR] = "mkchar",
38 [TOMOYO_MAC_FILE_LINK] = "link",
39 [TOMOYO_MAC_FILE_RENAME] = "rename",
40 [TOMOYO_MAC_FILE_CHMOD] = "chmod",
41 [TOMOYO_MAC_FILE_CHOWN] = "chown",
42 [TOMOYO_MAC_FILE_CHGRP] = "chgrp",
43 [TOMOYO_MAC_FILE_IOCTL] = "ioctl",
44 [TOMOYO_MAC_FILE_CHROOT] = "chroot",
45 [TOMOYO_MAC_FILE_MOUNT] = "mount",
46 [TOMOYO_MAC_FILE_UMOUNT] = "unmount",
47 [TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root",
059d84db
TH		 48 /* CONFIG::network group */
49 [TOMOYO_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind",
50 [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen",
51 [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect",
52 [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind",
53 [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send",
54 [TOMOYO_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind",
55 [TOMOYO_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send",
56 [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind",
57 [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen",
58 [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect",
59 [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind",
60 [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send",
61 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind",
62 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen",
63 [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect",
d58e0da8
TH		 64 /* CONFIG::misc group */
65 [TOMOYO_MAC_ENVIRON] = "env",
66 /* CONFIG group */
57c2590f 67 [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file",
059d84db 68 [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_NETWORK] = "network",
d58e0da8 69 [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_MISC] = "misc",
9590837b
KT		 70};
71
2066a361
TH		 72/* String table for conditions. */
73const char * const tomoyo_condition_keyword[TOMOYO_MAX_CONDITION_KEYWORD] = {
74 [TOMOYO_TASK_UID] = "task.uid",
75 [TOMOYO_TASK_EUID] = "task.euid",
76 [TOMOYO_TASK_SUID] = "task.suid",
77 [TOMOYO_TASK_FSUID] = "task.fsuid",
78 [TOMOYO_TASK_GID] = "task.gid",
79 [TOMOYO_TASK_EGID] = "task.egid",
80 [TOMOYO_TASK_SGID] = "task.sgid",
81 [TOMOYO_TASK_FSGID] = "task.fsgid",
82 [TOMOYO_TASK_PID] = "task.pid",
83 [TOMOYO_TASK_PPID] = "task.ppid",
5b636857
TH		 84 [TOMOYO_EXEC_ARGC] = "exec.argc",
85 [TOMOYO_EXEC_ENVC] = "exec.envc",
8761afd4
TH		 86 [TOMOYO_TYPE_IS_SOCKET] = "socket",
87 [TOMOYO_TYPE_IS_SYMLINK] = "symlink",
88 [TOMOYO_TYPE_IS_FILE] = "file",
89 [TOMOYO_TYPE_IS_BLOCK_DEV] = "block",
90 [TOMOYO_TYPE_IS_DIRECTORY] = "directory",
91 [TOMOYO_TYPE_IS_CHAR_DEV] = "char",
92 [TOMOYO_TYPE_IS_FIFO] = "fifo",
93 [TOMOYO_MODE_SETUID] = "setuid",
94 [TOMOYO_MODE_SETGID] = "setgid",
95 [TOMOYO_MODE_STICKY] = "sticky",
96 [TOMOYO_MODE_OWNER_READ] = "owner_read",
97 [TOMOYO_MODE_OWNER_WRITE] = "owner_write",
98 [TOMOYO_MODE_OWNER_EXECUTE] = "owner_execute",
99 [TOMOYO_MODE_GROUP_READ] = "group_read",
100 [TOMOYO_MODE_GROUP_WRITE] = "group_write",
101 [TOMOYO_MODE_GROUP_EXECUTE] = "group_execute",
102 [TOMOYO_MODE_OTHERS_READ] = "others_read",
103 [TOMOYO_MODE_OTHERS_WRITE] = "others_write",
104 [TOMOYO_MODE_OTHERS_EXECUTE] = "others_execute",
2ca9bf45
TH		 105 [TOMOYO_EXEC_REALPATH] = "exec.realpath",
106 [TOMOYO_SYMLINK_TARGET] = "symlink.target",
8761afd4
TH		 107 [TOMOYO_PATH1_UID] = "path1.uid",
108 [TOMOYO_PATH1_GID] = "path1.gid",
109 [TOMOYO_PATH1_INO] = "path1.ino",
110 [TOMOYO_PATH1_MAJOR] = "path1.major",
111 [TOMOYO_PATH1_MINOR] = "path1.minor",
112 [TOMOYO_PATH1_PERM] = "path1.perm",
113 [TOMOYO_PATH1_TYPE] = "path1.type",
114 [TOMOYO_PATH1_DEV_MAJOR] = "path1.dev_major",
115 [TOMOYO_PATH1_DEV_MINOR] = "path1.dev_minor",
116 [TOMOYO_PATH2_UID] = "path2.uid",
117 [TOMOYO_PATH2_GID] = "path2.gid",
118 [TOMOYO_PATH2_INO] = "path2.ino",
119 [TOMOYO_PATH2_MAJOR] = "path2.major",
120 [TOMOYO_PATH2_MINOR] = "path2.minor",
121 [TOMOYO_PATH2_PERM] = "path2.perm",
122 [TOMOYO_PATH2_TYPE] = "path2.type",
123 [TOMOYO_PATH2_DEV_MAJOR] = "path2.dev_major",
124 [TOMOYO_PATH2_DEV_MINOR] = "path2.dev_minor",
125 [TOMOYO_PATH1_PARENT_UID] = "path1.parent.uid",
126 [TOMOYO_PATH1_PARENT_GID] = "path1.parent.gid",
127 [TOMOYO_PATH1_PARENT_INO] = "path1.parent.ino",
128 [TOMOYO_PATH1_PARENT_PERM] = "path1.parent.perm",
129 [TOMOYO_PATH2_PARENT_UID] = "path2.parent.uid",
130 [TOMOYO_PATH2_PARENT_GID] = "path2.parent.gid",
131 [TOMOYO_PATH2_PARENT_INO] = "path2.parent.ino",
132 [TOMOYO_PATH2_PARENT_PERM] = "path2.parent.perm",
2066a361
TH		 133};
134
d5ca1725
TH		 135/* String table for PREFERENCE keyword. */
136static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = {
eadd99cc 137 [TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log",
d5ca1725
TH		 138 [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry",
139};
140
2c47ab93
TH		 141/* String table for path operation. */
142const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
143 [TOMOYO_TYPE_EXECUTE] = "execute",
144 [TOMOYO_TYPE_READ] = "read",
145 [TOMOYO_TYPE_WRITE] = "write",
146 [TOMOYO_TYPE_APPEND] = "append",
147 [TOMOYO_TYPE_UNLINK] = "unlink",
148 [TOMOYO_TYPE_GETATTR] = "getattr",
149 [TOMOYO_TYPE_RMDIR] = "rmdir",
150 [TOMOYO_TYPE_TRUNCATE] = "truncate",
151 [TOMOYO_TYPE_SYMLINK] = "symlink",
152 [TOMOYO_TYPE_CHROOT] = "chroot",
153 [TOMOYO_TYPE_UMOUNT] = "unmount",
154};
155
059d84db
TH		 156/* String table for socket's operation. */
157const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION] = {
158 [TOMOYO_NETWORK_BIND] = "bind",
159 [TOMOYO_NETWORK_LISTEN] = "listen",
160 [TOMOYO_NETWORK_CONNECT] = "connect",
161 [TOMOYO_NETWORK_SEND] = "send",
162};
163
2c47ab93
TH		 164/* String table for categories. */
165static const char * const tomoyo_category_keywords
166[TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
059d84db
TH		 167 [TOMOYO_MAC_CATEGORY_FILE] = "file",
168 [TOMOYO_MAC_CATEGORY_NETWORK] = "network",
169 [TOMOYO_MAC_CATEGORY_MISC] = "misc",
2c47ab93
TH		 170};
171
9590837b
KT		 172/* Permit policy management by non-root user? */
173static bool tomoyo_manage_by_non_root;
174
175/* Utility functions. */
176
57c2590f
TH		 177/**
178 * tomoyo_yesno - Return "yes" or "no".
179 *
180 * @value: Bool value.
181 */
eadd99cc 182const char *tomoyo_yesno(const unsigned int value)
57c2590f
TH		 183{
184 return value ? "yes" : "no";
185}
186
d5ca1725
TH		 187/**
188 * tomoyo_addprintf - strncat()-like-snprintf().
189 *
190 * @buffer: Buffer to write to. Must be '\0'-terminated.
191 * @len: Size of @buffer.
192 * @fmt: The printf()'s format string, followed by parameters.
193 *
194 * Returns nothing.
195 */
f23571e8
TH		 196static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...)
197{
198 va_list args;
199 const int pos = strlen(buffer);
cdcf6723 200
f23571e8
TH		 201 va_start(args, fmt);
202 vsnprintf(buffer + pos, len - pos - 1, fmt, args);
203 va_end(args);
204}
205
7762fbff 206/**
f23571e8 207 * tomoyo_flush - Flush queued string to userspace's buffer.
7762fbff 208 *
f23571e8 209 * @head: Pointer to "struct tomoyo_io_buffer".
7762fbff 210 *
f23571e8 211 * Returns true if all data was flushed, false otherwise.
7762fbff 212 */
f23571e8 213static bool tomoyo_flush(struct tomoyo_io_buffer *head)
7762fbff 214{
f23571e8
TH		 215 while (head->r.w_pos) {
216 const char *w = head->r.w[0];
2c47ab93 217 size_t len = strlen(w);
cdcf6723 218
f23571e8
TH		 219 if (len) {
220 if (len > head->read_user_buf_avail)
221 len = head->read_user_buf_avail;
222 if (!len)
223 return false;
224 if (copy_to_user(head->read_user_buf, w, len))
225 return false;
226 head->read_user_buf_avail -= len;
227 head->read_user_buf += len;
228 w += len;
229 }
c0fa797a
TH		 230 head->r.w[0] = w;
231 if (*w)
f23571e8 232 return false;
eadd99cc 233 /* Add '\0' for audit logs and query. */
f23571e8
TH		 234 if (head->poll) {
235 if (!head->read_user_buf_avail ||
236 copy_to_user(head->read_user_buf, "", 1))
237 return false;
238 head->read_user_buf_avail--;
239 head->read_user_buf++;
240 }
241 head->r.w_pos--;
242 for (len = 0; len < head->r.w_pos; len++)
243 head->r.w[len] = head->r.w[len + 1];
244 }
245 head->r.avail = 0;
246 return true;
7762fbff
TH		 247}
248
4c3e9e2d 249/**
f23571e8 250 * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure.
4c3e9e2d 251 *
f23571e8
TH		 252 * @head: Pointer to "struct tomoyo_io_buffer".
253 * @string: String to print.
4c3e9e2d 254 *
f23571e8
TH		 255 * Note that @string has to be kept valid until @head is kfree()d.
256 * This means that char[] allocated on stack memory cannot be passed to
257 * this function. Use tomoyo_io_printf() for char[] allocated on stack memory.
4c3e9e2d 258 */
f23571e8 259static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string)
4c3e9e2d 260{
f23571e8
TH		 261 if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) {
262 head->r.w[head->r.w_pos++] = string;
263 tomoyo_flush(head);
264 } else
265 WARN_ON(1);
4c3e9e2d
TH		 266}
267
778c4a4d
TH		 268static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt,
269 ...) __printf(2, 3);
270
9590837b 271/**
f23571e8 272 * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure.
9590837b
KT		 273 *
274 * @head: Pointer to "struct tomoyo_io_buffer".
275 * @fmt: The printf()'s format string, followed by parameters.
9590837b 276 */
778c4a4d
TH		 277static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt,
278 ...)
9590837b
KT		 279{
280 va_list args;
2c47ab93
TH		 281 size_t len;
282 size_t pos = head->r.avail;
9590837b 283 int size = head->readbuf_size - pos;
cdcf6723 284
9590837b 285 if (size <= 0)
f23571e8 286 return;
9590837b 287 va_start(args, fmt);
f23571e8 288 len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1;
9590837b 289 va_end(args);
f23571e8
TH		 290 if (pos + len >= head->readbuf_size) {
291 WARN_ON(1);
292 return;
293 }
294 head->r.avail += len;
295 tomoyo_set_string(head, head->read_buf + pos);
296}
297
0d2171d7
TH		 298/**
299 * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure.
300 *
301 * @head: Pointer to "struct tomoyo_io_buffer".
302 *
303 * Returns nothing.
304 */
f23571e8
TH		 305static void tomoyo_set_space(struct tomoyo_io_buffer *head)
306{
307 tomoyo_set_string(head, " ");
308}
309
0d2171d7
TH		 310/**
311 * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure.
312 *
313 * @head: Pointer to "struct tomoyo_io_buffer".
314 *
315 * Returns nothing.
316 */
f23571e8
TH		 317static bool tomoyo_set_lf(struct tomoyo_io_buffer *head)
318{
319 tomoyo_set_string(head, "\n");
320 return !head->r.w_pos;
321}
322
0d2171d7
TH		 323/**
324 * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure.
325 *
326 * @head: Pointer to "struct tomoyo_io_buffer".
327 *
328 * Returns nothing.
329 */
330static void tomoyo_set_slash(struct tomoyo_io_buffer *head)
331{
332 tomoyo_set_string(head, "/");
333}
334
bd03a3e4
TH		 335/* List of namespaces. */
336LIST_HEAD(tomoyo_namespace_list);
337/* True if namespace other than tomoyo_kernel_namespace is defined. */
338static bool tomoyo_namespace_enabled;
339
340/**
341 * tomoyo_init_policy_namespace - Initialize namespace.
342 *
343 * @ns: Pointer to "struct tomoyo_policy_namespace".
344 *
345 * Returns nothing.
346 */
347void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns)
348{
349 unsigned int idx;
cdcf6723 350
bd03a3e4
TH		 351 for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++)
352 INIT_LIST_HEAD(&ns->acl_group[idx]);
353 for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++)
354 INIT_LIST_HEAD(&ns->group_list[idx]);
355 for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++)
356 INIT_LIST_HEAD(&ns->policy_list[idx]);
861f4bcf 357 ns->profile_version = 20150505;
bd03a3e4
TH		 358 tomoyo_namespace_enabled = !list_empty(&tomoyo_namespace_list);
359 list_add_tail_rcu(&ns->namespace_list, &tomoyo_namespace_list);
360}
361
362/**
363 * tomoyo_print_namespace - Print namespace header.
364 *
365 * @head: Pointer to "struct tomoyo_io_buffer".
366 *
367 * Returns nothing.
368 */
369static void tomoyo_print_namespace(struct tomoyo_io_buffer *head)
370{
371 if (!tomoyo_namespace_enabled)
372 return;
373 tomoyo_set_string(head,
374 container_of(head->r.ns,
375 struct tomoyo_policy_namespace,
376 namespace_list)->name);
377 tomoyo_set_space(head);
378}
379
f23571e8
TH		 380/**
381 * tomoyo_print_name_union - Print a tomoyo_name_union.
382 *
383 * @head: Pointer to "struct tomoyo_io_buffer".
384 * @ptr: Pointer to "struct tomoyo_name_union".
385 */
386static void tomoyo_print_name_union(struct tomoyo_io_buffer *head,
387 const struct tomoyo_name_union *ptr)
388{
389 tomoyo_set_space(head);
0df7e8b8 390 if (ptr->group) {
f23571e8
TH		 391 tomoyo_set_string(head, "@");
392 tomoyo_set_string(head, ptr->group->group_name->name);
393 } else {
394 tomoyo_set_string(head, ptr->filename->name);
395 }
396}
397
2ca9bf45
TH		 398/**
399 * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote.
400 *
401 * @head: Pointer to "struct tomoyo_io_buffer".
402 * @ptr: Pointer to "struct tomoyo_name_union".
403 *
404 * Returns nothing.
405 */
406static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer *head,
407 const struct tomoyo_name_union *ptr)
408{
409 if (ptr->group) {
410 tomoyo_set_string(head, "@");
411 tomoyo_set_string(head, ptr->group->group_name->name);
412 } else {
413 tomoyo_set_string(head, "\"");
414 tomoyo_set_string(head, ptr->filename->name);
415 tomoyo_set_string(head, "\"");
416 }
417}
418
f23571e8 419/**
2066a361 420 * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space.
f23571e8 421 *
2066a361
TH		 422 * @head: Pointer to "struct tomoyo_io_buffer".
423 * @ptr: Pointer to "struct tomoyo_number_union".
424 *
425 * Returns nothing.
f23571e8 426 */
2066a361
TH		 427static void tomoyo_print_number_union_nospace
428(struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr)
f23571e8 429{
0df7e8b8 430 if (ptr->group) {
f23571e8
TH		 431 tomoyo_set_string(head, "@");
432 tomoyo_set_string(head, ptr->group->group_name->name);
433 } else {
434 int i;
435 unsigned long min = ptr->values[0];
436 const unsigned long max = ptr->values[1];
0df7e8b8
TH		 437 u8 min_type = ptr->value_type[0];
438 const u8 max_type = ptr->value_type[1];
f23571e8 439 char buffer[128];
cdcf6723 440
f23571e8
TH		 441 buffer[0] = '\0';
442 for (i = 0; i < 2; i++) {
443 switch (min_type) {
444 case TOMOYO_VALUE_TYPE_HEXADECIMAL:
445 tomoyo_addprintf(buffer, sizeof(buffer),
446 "0x%lX", min);
447 break;
448 case TOMOYO_VALUE_TYPE_OCTAL:
449 tomoyo_addprintf(buffer, sizeof(buffer),
450 "0%lo", min);
451 break;
452 default:
2066a361
TH		 453 tomoyo_addprintf(buffer, sizeof(buffer), "%lu",
454 min);
f23571e8
TH		 455 break;
456 }
457 if (min == max && min_type == max_type)
458 break;
459 tomoyo_addprintf(buffer, sizeof(buffer), "-");
460 min_type = max_type;
461 min = max;
462 }
463 tomoyo_io_printf(head, "%s", buffer);
464 }
9590837b
KT		 465}
466
2066a361
TH		 467/**
468 * tomoyo_print_number_union - Print a tomoyo_number_union.
469 *
470 * @head: Pointer to "struct tomoyo_io_buffer".
471 * @ptr: Pointer to "struct tomoyo_number_union".
472 *
473 * Returns nothing.
474 */
475static void tomoyo_print_number_union(struct tomoyo_io_buffer *head,
476 const struct tomoyo_number_union *ptr)
477{
478 tomoyo_set_space(head);
479 tomoyo_print_number_union_nospace(head, ptr);
480}
481
9590837b 482/**
e2bf6907 483 * tomoyo_assign_profile - Create a new profile.
9590837b 484 *
bd03a3e4 485 * @ns: Pointer to "struct tomoyo_policy_namespace".
9590837b
KT		 486 * @profile: Profile number to create.
487 *
488 * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
489 */
bd03a3e4
TH		 490static struct tomoyo_profile *tomoyo_assign_profile
491(struct tomoyo_policy_namespace *ns, const unsigned int profile)
9590837b 492{
57c2590f
TH		 493 struct tomoyo_profile *ptr;
494 struct tomoyo_profile *entry;
cdcf6723 495
9590837b
KT		 496 if (profile >= TOMOYO_MAX_PROFILES)
497 return NULL;
bd03a3e4 498 ptr = ns->profile_ptr[profile];
9590837b 499 if (ptr)
57c2590f 500 return ptr;
1b6b924e 501 entry = kzalloc(sizeof(*entry), GFP_NOFS | __GFP_NOWARN);
57c2590f
TH		 502 if (mutex_lock_interruptible(&tomoyo_policy_lock))
503 goto out;
bd03a3e4 504 ptr = ns->profile_ptr[profile];
57c2590f
TH		 505 if (!ptr && tomoyo_memory_ok(entry)) {
506 ptr = entry;
eadd99cc
TH		 507 ptr->default_config = TOMOYO_CONFIG_DISABLED |
508 TOMOYO_CONFIG_WANT_GRANT_LOG |
509 TOMOYO_CONFIG_WANT_REJECT_LOG;
57c2590f
TH		 510 memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT,
511 sizeof(ptr->config));
6afcb3b7
TH		 512 ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] =
513 CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG;
514 ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] =
515 CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY;
57c2590f 516 mb(); /* Avoid out-of-order execution. */
bd03a3e4 517 ns->profile_ptr[profile] = ptr;
57c2590f 518 entry = NULL;
cd7bec6a 519 }
29282381 520 mutex_unlock(&tomoyo_policy_lock);
57c2590f
TH		 521 out:
522 kfree(entry);
9590837b
KT		 523 return ptr;
524}
525
526/**
57c2590f
TH		 527 * tomoyo_profile - Find a profile.
528 *
bd03a3e4 529 * @ns: Pointer to "struct tomoyo_policy_namespace".
57c2590f
TH		 530 * @profile: Profile number to find.
531 *
532 * Returns pointer to "struct tomoyo_profile".
533 */
bd03a3e4
TH		 534struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
535 const u8 profile)
57c2590f 536{
d5ca1725 537 static struct tomoyo_profile tomoyo_null_profile;
bd03a3e4 538 struct tomoyo_profile *ptr = ns->profile_ptr[profile];
cdcf6723 539
d5ca1725
TH		 540 if (!ptr)
541 ptr = &tomoyo_null_profile;
57c2590f
TH		 542 return ptr;
543}
544
d5ca1725
TH		 545/**
546 * tomoyo_find_yesno - Find values for specified keyword.
547 *
548 * @string: String to check.
549 * @find: Name of keyword.
550 *
551 * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
552 */
8e568687
TH		 553static s8 tomoyo_find_yesno(const char *string, const char *find)
554{
555 const char *cp = strstr(string, find);
cdcf6723 556
8e568687
TH		 557 if (cp) {
558 cp += strlen(find);
559 if (!strncmp(cp, "=yes", 4))
560 return 1;
561 else if (!strncmp(cp, "=no", 3))
562 return 0;
563 }
564 return -1;
565}
566
d5ca1725
TH		 567/**
568 * tomoyo_set_uint - Set value for specified preference.
569 *
570 * @i: Pointer to "unsigned int".
571 * @string: String to check.
572 * @find: Name of keyword.
573 *
574 * Returns nothing.
575 */
8e568687
TH		 576static void tomoyo_set_uint(unsigned int *i, const char *string,
577 const char *find)
578{
579 const char *cp = strstr(string, find);
cdcf6723 580
8e568687
TH		 581 if (cp)
582 sscanf(cp + strlen(find), "=%u", i);
583}
584
d5ca1725
TH		 585/**
586 * tomoyo_set_mode - Set mode for specified profile.
587 *
588 * @name: Name of functionality.
589 * @value: Mode for @name.
590 * @profile: Pointer to "struct tomoyo_profile".
591 *
592 * Returns 0 on success, negative value otherwise.
593 */
8e568687 594static int tomoyo_set_mode(char *name, const char *value,
8e568687
TH		 595 struct tomoyo_profile *profile)
596{
597 u8 i;
598 u8 config;
cdcf6723 599
8e568687
TH		 600 if (!strcmp(name, "CONFIG")) {
601 i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX;
602 config = profile->default_config;
603 } else if (tomoyo_str_starts(&name, "CONFIG::")) {
604 config = 0;
605 for (i = 0; i < TOMOYO_MAX_MAC_INDEX
606 + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) {
2c47ab93 607 int len = 0;
cdcf6723 608
2c47ab93
TH		 609 if (i < TOMOYO_MAX_MAC_INDEX) {
610 const u8 c = tomoyo_index2category[i];
611 const char *category =
612 tomoyo_category_keywords[c];
cdcf6723 613
2c47ab93
TH		 614 len = strlen(category);
615 if (strncmp(name, category, len) ||
616 name[len++] != ':' || name[len++] != ':')
617 continue;
618 }
619 if (strcmp(name + len, tomoyo_mac_keywords[i]))
8e568687
TH		 620 continue;
621 config = profile->config[i];
622 break;
623 }
624 if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
625 return -EINVAL;
626 } else {
627 return -EINVAL;
628 }
d5ca1725 629 if (strstr(value, "use_default")) {
8e568687
TH		 630 config = TOMOYO_CONFIG_USE_DEFAULT;
631 } else {
632 u8 mode;
cdcf6723 633
8e568687
TH		 634 for (mode = 0; mode < 4; mode++)
635 if (strstr(value, tomoyo_mode[mode]))
636 /*
637 * Update lower 3 bits in order to distinguish
15269fb1 638 * 'config' from 'TOMOYO_CONFIG_USE_DEFAULT'.
8e568687
TH		 639 */
640 config = (config & ~7) | mode;
eadd99cc
TH		 641 if (config != TOMOYO_CONFIG_USE_DEFAULT) {
642 switch (tomoyo_find_yesno(value, "grant_log")) {
643 case 1:
644 config |= TOMOYO_CONFIG_WANT_GRANT_LOG;
645 break;
646 case 0:
647 config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG;
648 break;
649 }
650 switch (tomoyo_find_yesno(value, "reject_log")) {
651 case 1:
652 config |= TOMOYO_CONFIG_WANT_REJECT_LOG;
653 break;
654 case 0:
655 config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG;
656 break;
657 }
658 }
8e568687
TH		 659 }
660 if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
661 profile->config[i] = config;
662 else if (config != TOMOYO_CONFIG_USE_DEFAULT)
663 profile->default_config = config;
664 return 0;
665}
666
57c2590f
TH		 667/**
668 * tomoyo_write_profile - Write profile table.
9590837b
KT		 669 *
670 * @head: Pointer to "struct tomoyo_io_buffer".
671 *
672 * Returns 0 on success, negative value otherwise.
673 */
674static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
675{
676 char *data = head->write_buf;
677 unsigned int i;
9590837b
KT		 678 char *cp;
679 struct tomoyo_profile *profile;
cdcf6723 680
bd03a3e4
TH		 681 if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version)
682 == 1)
57c2590f
TH		 683 return 0;
684 i = simple_strtoul(data, &cp, 10);
d5ca1725
TH		 685 if (*cp != '-')
686 return -EINVAL;
687 data = cp + 1;
bd03a3e4 688 profile = tomoyo_assign_profile(head->w.ns, i);
d5ca1725
TH		 689 if (!profile)
690 return -EINVAL;
9590837b
KT		 691 cp = strchr(data, '=');
692 if (!cp)
693 return -EINVAL;
57c2590f 694 *cp++ = '\0';
9590837b 695 if (!strcmp(data, "COMMENT")) {
2a086e5d
TH		 696 static DEFINE_SPINLOCK(lock);
697 const struct tomoyo_path_info *new_comment
698 = tomoyo_get_name(cp);
699 const struct tomoyo_path_info *old_comment;
cdcf6723 700
2a086e5d
TH		 701 if (!new_comment)
702 return -ENOMEM;
703 spin_lock(&lock);
704 old_comment = profile->comment;
705 profile->comment = new_comment;
706 spin_unlock(&lock);
bf24fb01 707 tomoyo_put_name(old_comment);
9590837b
KT		 708 return 0;
709 }
d5ca1725
TH		 710 if (!strcmp(data, "PREFERENCE")) {
711 for (i = 0; i < TOMOYO_MAX_PREF; i++)
712 tomoyo_set_uint(&profile->pref[i], cp,
713 tomoyo_pref_keywords[i]);
714 return 0;
f23571e8 715 }
d5ca1725 716 return tomoyo_set_mode(data, cp, profile);
f23571e8
TH		 717}
718
eadd99cc
TH		 719/**
720 * tomoyo_print_config - Print mode for specified functionality.
721 *
722 * @head: Pointer to "struct tomoyo_io_buffer".
723 * @config: Mode for that functionality.
724 *
725 * Returns nothing.
726 *
727 * Caller prints functionality's name.
728 */
f23571e8
TH		 729static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config)
730{
eadd99cc
TH		 731 tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n",
732 tomoyo_mode[config & 3],
733 tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG),
734 tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG));
f23571e8
TH		 735}
736
9590837b 737/**
57c2590f 738 * tomoyo_read_profile - Read profile table.
9590837b
KT		 739 *
740 * @head: Pointer to "struct tomoyo_io_buffer".
eadd99cc
TH		 741 *
742 * Returns nothing.
9590837b 743 */
8fbe71f0 744static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
9590837b 745{
f23571e8 746 u8 index;
bd03a3e4
TH		 747 struct tomoyo_policy_namespace *ns =
748 container_of(head->r.ns, typeof(*ns), namespace_list);
f23571e8 749 const struct tomoyo_profile *profile;
cdcf6723 750
bd03a3e4
TH		 751 if (head->r.eof)
752 return;
f23571e8
TH		 753 next:
754 index = head->r.index;
bd03a3e4 755 profile = ns->profile_ptr[index];
f23571e8
TH		 756 switch (head->r.step) {
757 case 0:
bd03a3e4
TH		 758 tomoyo_print_namespace(head);
759 tomoyo_io_printf(head, "PROFILE_VERSION=%u\n",
760 ns->profile_version);
f23571e8
TH		 761 head->r.step++;
762 break;
763 case 1:
764 for ( ; head->r.index < TOMOYO_MAX_PROFILES;
765 head->r.index++)
bd03a3e4 766 if (ns->profile_ptr[head->r.index])
f23571e8 767 break;
4d818971
TH		 768 if (head->r.index == TOMOYO_MAX_PROFILES) {
769 head->r.eof = true;
f23571e8 770 return;
4d818971 771 }
f23571e8
TH		 772 head->r.step++;
773 break;
774 case 2:
775 {
d5ca1725 776 u8 i;
f23571e8
TH		 777 const struct tomoyo_path_info *comment =
778 profile->comment;
cdcf6723 779
bd03a3e4 780 tomoyo_print_namespace(head);
f23571e8
TH		 781 tomoyo_io_printf(head, "%u-COMMENT=", index);
782 tomoyo_set_string(head, comment ? comment->name : "");
783 tomoyo_set_lf(head);
4d818971 784 tomoyo_print_namespace(head);
d5ca1725
TH		 785 tomoyo_io_printf(head, "%u-PREFERENCE={ ", index);
786 for (i = 0; i < TOMOYO_MAX_PREF; i++)
787 tomoyo_io_printf(head, "%s=%u ",
788 tomoyo_pref_keywords[i],
789 profile->pref[i]);
790 tomoyo_set_string(head, "}\n");
f23571e8
TH		 791 head->r.step++;
792 }
793 break;
794 case 3:
795 {
bd03a3e4 796 tomoyo_print_namespace(head);
f23571e8
TH		 797 tomoyo_io_printf(head, "%u-%s", index, "CONFIG");
798 tomoyo_print_config(head, profile->default_config);
799 head->r.bit = 0;
800 head->r.step++;
801 }
802 break;
803 case 4:
804 for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX
805 + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) {
806 const u8 i = head->r.bit;
807 const u8 config = profile->config[i];
cdcf6723 808
57c2590f
TH		 809 if (config == TOMOYO_CONFIG_USE_DEFAULT)
810 continue;
bd03a3e4 811 tomoyo_print_namespace(head);
2c47ab93
TH		 812 if (i < TOMOYO_MAX_MAC_INDEX)
813 tomoyo_io_printf(head, "%u-CONFIG::%s::%s",
814 index,
815 tomoyo_category_keywords
816 [tomoyo_index2category[i]],
817 tomoyo_mac_keywords[i]);
818 else
819 tomoyo_io_printf(head, "%u-CONFIG::%s", index,
820 tomoyo_mac_keywords[i]);
f23571e8
TH		 821 tomoyo_print_config(head, config);
822 head->r.bit++;
823 break;
824 }
825 if (head->r.bit == TOMOYO_MAX_MAC_INDEX
826 + TOMOYO_MAX_MAC_CATEGORY_INDEX) {
f23571e8
TH		 827 head->r.index++;
828 head->r.step = 1;
9590837b 829 }
57c2590f 830 break;
9590837b 831 }
f23571e8
TH		 832 if (tomoyo_flush(head))
833 goto next;
9590837b
KT		 834}
835
0f2a55d5
TH		 836/**
837 * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry.
838 *
839 * @a: Pointer to "struct tomoyo_acl_head".
840 * @b: Pointer to "struct tomoyo_acl_head".
841 *
842 * Returns true if @a == @b, false otherwise.
843 */
e2bf6907
TH		 844static bool tomoyo_same_manager(const struct tomoyo_acl_head *a,
845 const struct tomoyo_acl_head *b)
36f5e1ff 846{
e2bf6907
TH		 847 return container_of(a, struct tomoyo_manager, head)->manager ==
848 container_of(b, struct tomoyo_manager, head)->manager;
36f5e1ff
TH		 849}
850
9590837b
KT		 851/**
852 * tomoyo_update_manager_entry - Add a manager entry.
853 *
854 * @manager: The path to manager or the domainnamme.
855 * @is_delete: True if it is a delete request.
856 *
857 * Returns 0 on success, negative value otherwise.
fdb8ebb7
TH		 858 *
859 * Caller holds tomoyo_read_lock().
9590837b
KT		 860 */
861static int tomoyo_update_manager_entry(const char *manager,
862 const bool is_delete)
863{
e2bf6907 864 struct tomoyo_manager e = { };
a238cf5b 865 struct tomoyo_acl_param param = {
bd03a3e4 866 /* .ns = &tomoyo_kernel_namespace, */
a238cf5b 867 .is_delete = is_delete,
cdcf6723 868 .list = &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER],
a238cf5b
TH		 869 };
870 int error = is_delete ? -ENOENT : -ENOMEM;
cdcf6723 871
77b513dd
TH		 872 if (!tomoyo_correct_domain(manager) &&
873 !tomoyo_correct_word(manager))
874 return -EINVAL;
9e4b50e9 875 e.manager = tomoyo_get_name(manager);
a238cf5b
TH		 876 if (e.manager) {
877 error = tomoyo_update_policy(&e.head, sizeof(e), &param,
878 tomoyo_same_manager);
879 tomoyo_put_name(e.manager);
880 }
9590837b
KT		 881 return error;
882}
883
884/**
e2bf6907 885 * tomoyo_write_manager - Write manager policy.
9590837b
KT		 886 *
887 * @head: Pointer to "struct tomoyo_io_buffer".
888 *
889 * Returns 0 on success, negative value otherwise.
fdb8ebb7
TH		 890 *
891 * Caller holds tomoyo_read_lock().
9590837b 892 */
e2bf6907 893static int tomoyo_write_manager(struct tomoyo_io_buffer *head)
9590837b
KT		 894{
895 char *data = head->write_buf;
9590837b
KT		 896
897 if (!strcmp(data, "manage_by_non_root")) {
bd03a3e4 898 tomoyo_manage_by_non_root = !head->w.is_delete;
9590837b
KT		 899 return 0;
900 }
bd03a3e4 901 return tomoyo_update_manager_entry(data, head->w.is_delete);
9590837b
KT		 902}
903
904/**
e2bf6907 905 * tomoyo_read_manager - Read manager policy.
9590837b
KT		 906 *
907 * @head: Pointer to "struct tomoyo_io_buffer".
908 *
fdb8ebb7 909 * Caller holds tomoyo_read_lock().
9590837b 910 */
e2bf6907 911static void tomoyo_read_manager(struct tomoyo_io_buffer *head)
9590837b 912{
f23571e8 913 if (head->r.eof)
8fbe71f0 914 return;
cdcf6723 915 list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER]) {
e2bf6907 916 struct tomoyo_manager *ptr =
f23571e8 917 list_entry(head->r.acl, typeof(*ptr), head.list);
cdcf6723 918
82e0f001 919 if (ptr->head.is_deleted)
9590837b 920 continue;
f23571e8
TH		 921 if (!tomoyo_flush(head))
922 return;
923 tomoyo_set_string(head, ptr->manager->name);
924 tomoyo_set_lf(head);
9590837b 925 }
f23571e8 926 head->r.eof = true;
9590837b
KT		 927}
928
929/**
e2bf6907 930 * tomoyo_manager - Check whether the current process is a policy manager.
9590837b
KT		 931 *
932 * Returns true if the current process is permitted to modify policy
933 * via /sys/kernel/security/tomoyo/ interface.
fdb8ebb7
TH		 934 *
935 * Caller holds tomoyo_read_lock().
9590837b 936 */
e2bf6907 937static bool tomoyo_manager(void)
9590837b 938{
e2bf6907 939 struct tomoyo_manager *ptr;
9590837b
KT		 940 const char *exe;
941 const struct task_struct *task = current;
942 const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname;
e80b1859 943 bool found = IS_ENABLED(CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING);
9590837b
KT		 944
945 if (!tomoyo_policy_loaded)
946 return true;
609fcd1b
EB		 947 if (!tomoyo_manage_by_non_root &&
948 (!uid_eq(task->cred->uid, GLOBAL_ROOT_UID) ||
949 !uid_eq(task->cred->euid, GLOBAL_ROOT_UID)))
9590837b 950 return false;
9590837b
KT		 951 exe = tomoyo_get_exe();
952 if (!exe)
953 return false;
6bd5ce60
TH		 954 list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER], head.list,
955 srcu_read_lock_held(&tomoyo_ss)) {
77b513dd
TH		 956 if (!ptr->head.is_deleted &&
957 (!tomoyo_pathcmp(domainname, ptr->manager) ||
958 !strcmp(exe, ptr->manager->name))) {
9590837b
KT		 959 found = true;
960 break;
961 }
962 }
9590837b
KT		 963 if (!found) { /* Reduce error messages. */
964 static pid_t last_pid;
965 const pid_t pid = current->pid;
cdcf6723 966
9590837b 967 if (last_pid != pid) {
cdcf6723
TH		 968 pr_warn("%s ( %s ) is not permitted to update policies.\n",
969 domainname->name, exe);
9590837b
KT		 970 last_pid = pid;
971 }
972 }
8e2d39a1 973 kfree(exe);
9590837b
KT		 974 return found;
975}
976
59df3166
TH		 977static struct tomoyo_domain_info *tomoyo_find_domain_by_qid
978(unsigned int serial);
979
9590837b 980/**
bd03a3e4 981 * tomoyo_select_domain - Parse select command.
9590837b
KT		 982 *
983 * @head: Pointer to "struct tomoyo_io_buffer".
984 * @data: String to parse.
985 *
986 * Returns true on success, false otherwise.
fdb8ebb7
TH		 987 *
988 * Caller holds tomoyo_read_lock().
9590837b 989 */
bd03a3e4
TH		 990static bool tomoyo_select_domain(struct tomoyo_io_buffer *head,
991 const char *data)
9590837b
KT		 992{
993 unsigned int pid;
994 struct tomoyo_domain_info *domain = NULL;
9b244373 995 bool global_pid = false;
cdcf6723 996
bd03a3e4
TH		 997 if (strncmp(data, "select ", 7))
998 return false;
999 data += 7;
9b244373
TH		 1000 if (sscanf(data, "pid=%u", &pid) == 1 ||
1001 (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
9590837b 1002 struct task_struct *p;
cdcf6723 1003
1fcdc7c5 1004 rcu_read_lock();
9b244373
TH		 1005 if (global_pid)
1006 p = find_task_by_pid_ns(pid, &init_pid_ns);
1007 else
1008 p = find_task_by_vpid(pid);
9590837b 1009 if (p)
8c6cb983 1010 domain = tomoyo_task(p)->domain_info;
1fcdc7c5 1011 rcu_read_unlock();
9590837b 1012 } else if (!strncmp(data, "domain=", 7)) {
75093152 1013 if (tomoyo_domain_def(data + 7))
9590837b 1014 domain = tomoyo_find_domain(data + 7);
59df3166
TH		 1015 } else if (sscanf(data, "Q=%u", &pid) == 1) {
1016 domain = tomoyo_find_domain_by_qid(pid);
9590837b
KT		 1017 } else
1018 return false;
0df7e8b8 1019 head->w.domain = domain;
9590837b
KT		 1020 /* Accessing read_buf is safe because head->io_sem is held. */
1021 if (!head->read_buf)
1022 return true; /* Do nothing if open(O_WRONLY). */
f23571e8
TH		 1023 memset(&head->r, 0, sizeof(head->r));
1024 head->r.print_this_domain_only = true;
68eda8f5
DC		 1025 if (domain)
1026 head->r.domain = &domain->list;
1027 else
27acbf41 1028 head->r.eof = true;
9590837b 1029 tomoyo_io_printf(head, "# select %s\n", data);
475e6fa3
TH		 1030 if (domain && domain->is_deleted)
1031 tomoyo_io_printf(head, "# This is a deleted domain.\n");
9590837b
KT		 1032 return true;
1033}
1034
731d37aa
TH		 1035/**
1036 * tomoyo_same_task_acl - Check for duplicated "struct tomoyo_task_acl" entry.
1037 *
1038 * @a: Pointer to "struct tomoyo_acl_info".
1039 * @b: Pointer to "struct tomoyo_acl_info".
1040 *
1041 * Returns true if @a == @b, false otherwise.
1042 */
1043static bool tomoyo_same_task_acl(const struct tomoyo_acl_info *a,
cdcf6723 1044 const struct tomoyo_acl_info *b)
731d37aa
TH		 1045{
1046 const struct tomoyo_task_acl *p1 = container_of(a, typeof(*p1), head);
1047 const struct tomoyo_task_acl *p2 = container_of(b, typeof(*p2), head);
cdcf6723 1048
731d37aa
TH		 1049 return p1->domainname == p2->domainname;
1050}
1051
1052/**
1053 * tomoyo_write_task - Update task related list.
1054 *
1055 * @param: Pointer to "struct tomoyo_acl_param".
1056 *
1057 * Returns 0 on success, negative value otherwise.
1058 *
1059 * Caller holds tomoyo_read_lock().
1060 */
1061static int tomoyo_write_task(struct tomoyo_acl_param *param)
1062{
1063 int error = -EINVAL;
cdcf6723 1064
731d37aa
TH		 1065 if (tomoyo_str_starts(&param->data, "manual_domain_transition ")) {
1066 struct tomoyo_task_acl e = {
1067 .head.type = TOMOYO_TYPE_MANUAL_TASK_ACL,
1068 .domainname = tomoyo_get_domainname(param),
1069 };
cdcf6723 1070
731d37aa
TH		 1071 if (e.domainname)
1072 error = tomoyo_update_domain(&e.head, sizeof(e), param,
1073 tomoyo_same_task_acl,
1074 NULL);
1075 tomoyo_put_name(e.domainname);
1076 }
1077 return error;
1078}
1079
ccf135f5
TH		 1080/**
1081 * tomoyo_delete_domain - Delete a domain.
1082 *
1083 * @domainname: The name of domain.
1084 *
7d7473db 1085 * Returns 0 on success, negative value otherwise.
fdb8ebb7
TH		 1086 *
1087 * Caller holds tomoyo_read_lock().
ccf135f5
TH		 1088 */
1089static int tomoyo_delete_domain(char *domainname)
1090{
1091 struct tomoyo_domain_info *domain;
1092 struct tomoyo_path_info name;
1093
1094 name.name = domainname;
1095 tomoyo_fill_path_info(&name);
29282381 1096 if (mutex_lock_interruptible(&tomoyo_policy_lock))
7d7473db 1097 return -EINTR;
ccf135f5 1098 /* Is there an active domain? */
6bd5ce60
TH		 1099 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list,
1100 srcu_read_lock_held(&tomoyo_ss)) {
ccf135f5
TH		 1101 /* Never delete tomoyo_kernel_domain */
1102 if (domain == &tomoyo_kernel_domain)
1103 continue;
1104 if (domain->is_deleted ||
1105 tomoyo_pathcmp(domain->domainname, &name))
1106 continue;
1107 domain->is_deleted = true;
1108 break;
1109 }
f737d95d 1110 mutex_unlock(&tomoyo_policy_lock);
ccf135f5
TH		 1111 return 0;
1112}
1113
17fcfbd9 1114/**
e2bf6907 1115 * tomoyo_write_domain2 - Write domain policy.
17fcfbd9 1116 *
bd03a3e4 1117 * @ns: Pointer to "struct tomoyo_policy_namespace".
a238cf5b
TH		 1118 * @list: Pointer to "struct list_head".
1119 * @data: Policy to be interpreted.
1120 * @is_delete: True if it is a delete request.
17fcfbd9
TH		 1121 *
1122 * Returns 0 on success, negative value otherwise.
1123 *
1124 * Caller holds tomoyo_read_lock().
1125 */
bd03a3e4
TH		 1126static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns,
1127 struct list_head *list, char *data,
e2bf6907 1128 const bool is_delete)
17fcfbd9 1129{
a238cf5b 1130 struct tomoyo_acl_param param = {
bd03a3e4 1131 .ns = ns,
a238cf5b
TH		 1132 .list = list,
1133 .data = data,
1134 .is_delete = is_delete,
1135 };
1136 static const struct {
1137 const char *keyword;
cdcf6723 1138 int (*write)(struct tomoyo_acl_param *param);
731d37aa 1139 } tomoyo_callback[5] = {
a238cf5b 1140 { "file ", tomoyo_write_file },
059d84db
TH		 1141 { "network inet ", tomoyo_write_inet_network },
1142 { "network unix ", tomoyo_write_unix_network },
d58e0da8 1143 { "misc ", tomoyo_write_misc },
731d37aa 1144 { "task ", tomoyo_write_task },
a238cf5b
TH		 1145 };
1146 u8 i;
d58e0da8
TH		 1147
1148 for (i = 0; i < ARRAY_SIZE(tomoyo_callback); i++) {
a238cf5b
TH		 1149 if (!tomoyo_str_starts(&param.data,
1150 tomoyo_callback[i].keyword))
1151 continue;
1152 return tomoyo_callback[i].write(&param);
1153 }
1154 return -EINVAL;
17fcfbd9
TH		 1155}
1156
2c47ab93
TH		 1157/* String table for domain flags. */
1158const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = {
1159 [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n",
1160 [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n",
1161};
1162
9590837b 1163/**
e2bf6907 1164 * tomoyo_write_domain - Write domain policy.
9590837b
KT		 1165 *
1166 * @head: Pointer to "struct tomoyo_io_buffer".
1167 *
1168 * Returns 0 on success, negative value otherwise.
fdb8ebb7
TH		 1169 *
1170 * Caller holds tomoyo_read_lock().
9590837b 1171 */
e2bf6907 1172static int tomoyo_write_domain(struct tomoyo_io_buffer *head)
9590837b
KT		 1173{
1174 char *data = head->write_buf;
bd03a3e4 1175 struct tomoyo_policy_namespace *ns;
0df7e8b8 1176 struct tomoyo_domain_info *domain = head->w.domain;
bd03a3e4
TH		 1177 const bool is_delete = head->w.is_delete;
1178 bool is_select = !is_delete && tomoyo_str_starts(&data, "select ");
4b425641 1179 unsigned int idx;
cdcf6723 1180
bd03a3e4 1181 if (*data == '<') {
7d7473db 1182 int ret = 0;
cdcf6723 1183
9590837b
KT		 1184 domain = NULL;
1185 if (is_delete)
7d7473db 1186 ret = tomoyo_delete_domain(data);
fdb8ebb7 1187 else if (is_select)
9590837b 1188 domain = tomoyo_find_domain(data);
fdb8ebb7 1189 else
bd03a3e4 1190 domain = tomoyo_assign_domain(data, false);
0df7e8b8 1191 head->w.domain = domain;
7d7473db 1192 return ret;
9590837b
KT		 1193 }
1194 if (!domain)
1195 return -EINVAL;
bd03a3e4 1196 ns = domain->ns;
4b425641
TH		 1197 if (sscanf(data, "use_profile %u", &idx) == 1
1198 && idx < TOMOYO_MAX_PROFILES) {
1199 if (!tomoyo_policy_loaded || ns->profile_ptr[idx])
1200 if (!is_delete)
1201 domain->profile = (u8) idx;
9590837b
KT		 1202 return 0;
1203 }
4b425641
TH		 1204 if (sscanf(data, "use_group %u\n", &idx) == 1
1205 && idx < TOMOYO_MAX_ACL_GROUPS) {
32997144 1206 if (!is_delete)
4b425641
TH		 1207 set_bit(idx, domain->group);
1208 else
1209 clear_bit(idx, domain->group);
32997144
TH		 1210 return 0;
1211 }
4b425641
TH		 1212 for (idx = 0; idx < TOMOYO_MAX_DOMAIN_INFO_FLAGS; idx++) {
1213 const char *cp = tomoyo_dif[idx];
cdcf6723 1214
2c47ab93
TH		 1215 if (strncmp(data, cp, strlen(cp) - 1))
1216 continue;
4b425641 1217 domain->flags[idx] = !is_delete;
9b244373
TH		 1218 return 0;
1219 }
bd03a3e4
TH		 1220 return tomoyo_write_domain2(ns, &domain->acl_info_list, data,
1221 is_delete);
9590837b
KT		 1222}
1223
2066a361
TH		 1224/**
1225 * tomoyo_print_condition - Print condition part.
1226 *
1227 * @head: Pointer to "struct tomoyo_io_buffer".
1228 * @cond: Pointer to "struct tomoyo_condition".
1229 *
1230 * Returns true on success, false otherwise.
1231 */
1232static bool tomoyo_print_condition(struct tomoyo_io_buffer *head,
1233 const struct tomoyo_condition *cond)
1234{
1235 switch (head->r.cond_step) {
1236 case 0:
1237 head->r.cond_index = 0;
1238 head->r.cond_step++;
6bce98ed
TH		 1239 if (cond->transit) {
1240 tomoyo_set_space(head);
1241 tomoyo_set_string(head, cond->transit->name);
1242 }
df561f66 1243 fallthrough;
2066a361
TH		 1244 case 1:
1245 {
1246 const u16 condc = cond->condc;
1247 const struct tomoyo_condition_element *condp =
1248 (typeof(condp)) (cond + 1);
1249 const struct tomoyo_number_union *numbers_p =
1250 (typeof(numbers_p)) (condp + condc);
2ca9bf45
TH		 1251 const struct tomoyo_name_union *names_p =
1252 (typeof(names_p))
1253 (numbers_p + cond->numbers_count);
5b636857
TH		 1254 const struct tomoyo_argv *argv =
1255 (typeof(argv)) (names_p + cond->names_count);
1256 const struct tomoyo_envp *envp =
1257 (typeof(envp)) (argv + cond->argc);
2066a361 1258 u16 skip;
cdcf6723 1259
2066a361
TH		 1260 for (skip = 0; skip < head->r.cond_index; skip++) {
1261 const u8 left = condp->left;
1262 const u8 right = condp->right;
cdcf6723 1263
2066a361
TH		 1264 condp++;
1265 switch (left) {
5b636857
TH		 1266 case TOMOYO_ARGV_ENTRY:
1267 argv++;
1268 continue;
1269 case TOMOYO_ENVP_ENTRY:
1270 envp++;
1271 continue;
2066a361
TH		 1272 case TOMOYO_NUMBER_UNION:
1273 numbers_p++;
1274 break;
1275 }
1276 switch (right) {
2ca9bf45
TH		 1277 case TOMOYO_NAME_UNION:
1278 names_p++;
1279 break;
2066a361
TH		 1280 case TOMOYO_NUMBER_UNION:
1281 numbers_p++;
1282 break;
1283 }
1284 }
1285 while (head->r.cond_index < condc) {
1286 const u8 match = condp->equals;
1287 const u8 left = condp->left;
1288 const u8 right = condp->right;
cdcf6723 1289
2066a361
TH		 1290 if (!tomoyo_flush(head))
1291 return false;
1292 condp++;
1293 head->r.cond_index++;
1294 tomoyo_set_space(head);
1295 switch (left) {
5b636857
TH		 1296 case TOMOYO_ARGV_ENTRY:
1297 tomoyo_io_printf(head,
1298 "exec.argv[%lu]%s=\"",
cdcf6723 1299 argv->index, argv->is_not ? "!" : "");
5b636857
TH		 1300 tomoyo_set_string(head,
1301 argv->value->name);
1302 tomoyo_set_string(head, "\"");
1303 argv++;
1304 continue;
1305 case TOMOYO_ENVP_ENTRY:
1306 tomoyo_set_string(head,
1307 "exec.envp[\"");
1308 tomoyo_set_string(head,
1309 envp->name->name);
cdcf6723 1310 tomoyo_io_printf(head, "\"]%s=", envp->is_not ? "!" : "");
5b636857
TH		 1311 if (envp->value) {
1312 tomoyo_set_string(head, "\"");
cdcf6723 1313 tomoyo_set_string(head, envp->value->name);
5b636857
TH		 1314 tomoyo_set_string(head, "\"");
1315 } else {
1316 tomoyo_set_string(head,
1317 "NULL");
1318 }
1319 envp++;
1320 continue;
2066a361
TH		 1321 case TOMOYO_NUMBER_UNION:
1322 tomoyo_print_number_union_nospace
1323 (head, numbers_p++);
1324 break;
1325 default:
1326 tomoyo_set_string(head,
1327 tomoyo_condition_keyword[left]);
1328 break;
1329 }
1330 tomoyo_set_string(head, match ? "=" : "!=");
1331 switch (right) {
2ca9bf45
TH		 1332 case TOMOYO_NAME_UNION:
1333 tomoyo_print_name_union_quoted
1334 (head, names_p++);
1335 break;
2066a361
TH		 1336 case TOMOYO_NUMBER_UNION:
1337 tomoyo_print_number_union_nospace
1338 (head, numbers_p++);
1339 break;
1340 default:
1341 tomoyo_set_string(head,
1342 tomoyo_condition_keyword[right]);
1343 break;
1344 }
1345 }
1346 }
1347 head->r.cond_step++;
df561f66 1348 fallthrough;
2066a361
TH		 1349 case 2:
1350 if (!tomoyo_flush(head))
1351 break;
1352 head->r.cond_step++;
df561f66 1353 fallthrough;
2066a361 1354 case 3:
1f067a68
TH		 1355 if (cond->grant_log != TOMOYO_GRANTLOG_AUTO)
1356 tomoyo_io_printf(head, " grant_log=%s",
1357 tomoyo_yesno(cond->grant_log ==
1358 TOMOYO_GRANTLOG_YES));
2066a361
TH		 1359 tomoyo_set_lf(head);
1360 return true;
1361 }
1362 return false;
1363}
1364
9590837b 1365/**
32997144 1366 * tomoyo_set_group - Print "acl_group " header keyword and category name.
9590837b 1367 *
0d2171d7
TH		 1368 * @head: Pointer to "struct tomoyo_io_buffer".
1369 * @category: Category name.
9590837b 1370 *
0d2171d7 1371 * Returns nothing.
9590837b 1372 */
0d2171d7
TH		 1373static void tomoyo_set_group(struct tomoyo_io_buffer *head,
1374 const char *category)
9590837b 1375{
bd03a3e4
TH		 1376 if (head->type == TOMOYO_EXCEPTIONPOLICY) {
1377 tomoyo_print_namespace(head);
32997144
TH		 1378 tomoyo_io_printf(head, "acl_group %u ",
1379 head->r.acl_group_index);
bd03a3e4 1380 }
0d2171d7 1381 tomoyo_set_string(head, category);
9590837b
KT		 1382}
1383
1384/**
5db5a39b 1385 * tomoyo_print_entry - Print an ACL entry.
9590837b
KT		 1386 *
1387 * @head: Pointer to "struct tomoyo_io_buffer".
5db5a39b 1388 * @acl: Pointer to an ACL entry.
9590837b
KT		 1389 *
1390 * Returns true on success, false otherwise.
1391 */
5db5a39b
TH		 1392static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
1393 struct tomoyo_acl_info *acl)
9590837b 1394{
5db5a39b 1395 const u8 acl_type = acl->type;
0d2171d7 1396 bool first = true;
f23571e8 1397 u8 bit;
9590837b 1398
2066a361
TH		 1399 if (head->r.print_cond_part)
1400 goto print_cond_part;
5db5a39b
TH		 1401 if (acl->is_deleted)
1402 return true;
f23571e8
TH		 1403 if (!tomoyo_flush(head))
1404 return false;
1405 else if (acl_type == TOMOYO_TYPE_PATH_ACL) {
5db5a39b
TH		 1406 struct tomoyo_path_acl *ptr =
1407 container_of(acl, typeof(*ptr), head);
1408 const u16 perm = ptr->perm;
cdcf6723 1409
0d2171d7 1410 for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
5db5a39b
TH		 1411 if (!(perm & (1 << bit)))
1412 continue;
bd03a3e4 1413 if (head->r.print_transition_related_only &&
5db5a39b
TH		 1414 bit != TOMOYO_TYPE_EXECUTE)
1415 continue;
0d2171d7
TH		 1416 if (first) {
1417 tomoyo_set_group(head, "file ");
1418 first = false;
1419 } else {
1420 tomoyo_set_slash(head);
1421 }
1422 tomoyo_set_string(head, tomoyo_path_keyword[bit]);
5db5a39b 1423 }
0d2171d7
TH		 1424 if (first)
1425 return true;
f23571e8 1426 tomoyo_print_name_union(head, &ptr->name);
731d37aa
TH		 1427 } else if (acl_type == TOMOYO_TYPE_MANUAL_TASK_ACL) {
1428 struct tomoyo_task_acl *ptr =
1429 container_of(acl, typeof(*ptr), head);
cdcf6723 1430
731d37aa
TH		 1431 tomoyo_set_group(head, "task ");
1432 tomoyo_set_string(head, "manual_domain_transition ");
1433 tomoyo_set_string(head, ptr->domainname->name);
bd03a3e4 1434 } else if (head->r.print_transition_related_only) {
5db5a39b
TH		 1435 return true;
1436 } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
1437 struct tomoyo_path2_acl *ptr =
1438 container_of(acl, typeof(*ptr), head);
0d2171d7 1439 const u8 perm = ptr->perm;
cdcf6723 1440
0d2171d7
TH		 1441 for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) {
1442 if (!(perm & (1 << bit)))
1443 continue;
1444 if (first) {
1445 tomoyo_set_group(head, "file ");
1446 first = false;
1447 } else {
1448 tomoyo_set_slash(head);
1449 }
1450 tomoyo_set_string(head, tomoyo_mac_keywords
1451 [tomoyo_pp2mac[bit]]);
1452 }
1453 if (first)
1454 return true;
f23571e8
TH		 1455 tomoyo_print_name_union(head, &ptr->name1);
1456 tomoyo_print_name_union(head, &ptr->name2);
5db5a39b
TH		 1457 } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) {
1458 struct tomoyo_path_number_acl *ptr =
1459 container_of(acl, typeof(*ptr), head);
0d2171d7 1460 const u8 perm = ptr->perm;
cdcf6723 1461
0d2171d7
TH		 1462 for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) {
1463 if (!(perm & (1 << bit)))
1464 continue;
1465 if (first) {
1466 tomoyo_set_group(head, "file ");
1467 first = false;
1468 } else {
1469 tomoyo_set_slash(head);
1470 }
1471 tomoyo_set_string(head, tomoyo_mac_keywords
1472 [tomoyo_pn2mac[bit]]);
1473 }
1474 if (first)
1475 return true;
f23571e8
TH		 1476 tomoyo_print_name_union(head, &ptr->name);
1477 tomoyo_print_number_union(head, &ptr->number);
5db5a39b
TH		 1478 } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
1479 struct tomoyo_mkdev_acl *ptr =
1480 container_of(acl, typeof(*ptr), head);
0d2171d7 1481 const u8 perm = ptr->perm;
cdcf6723 1482
0d2171d7
TH		 1483 for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) {
1484 if (!(perm & (1 << bit)))
1485 continue;
1486 if (first) {
1487 tomoyo_set_group(head, "file ");
1488 first = false;
1489 } else {
1490 tomoyo_set_slash(head);
1491 }
1492 tomoyo_set_string(head, tomoyo_mac_keywords
1493 [tomoyo_pnnn2mac[bit]]);
1494 }
1495 if (first)
1496 return true;
f23571e8
TH		 1497 tomoyo_print_name_union(head, &ptr->name);
1498 tomoyo_print_number_union(head, &ptr->mode);
1499 tomoyo_print_number_union(head, &ptr->major);
1500 tomoyo_print_number_union(head, &ptr->minor);
059d84db
TH		 1501 } else if (acl_type == TOMOYO_TYPE_INET_ACL) {
1502 struct tomoyo_inet_acl *ptr =
1503 container_of(acl, typeof(*ptr), head);
1504 const u8 perm = ptr->perm;
1505
1506 for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
1507 if (!(perm & (1 << bit)))
1508 continue;
1509 if (first) {
1510 tomoyo_set_group(head, "network inet ");
1511 tomoyo_set_string(head, tomoyo_proto_keyword
1512 [ptr->protocol]);
1513 tomoyo_set_space(head);
1514 first = false;
1515 } else {
1516 tomoyo_set_slash(head);
1517 }
1518 tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
1519 }
1520 if (first)
1521 return true;
1522 tomoyo_set_space(head);
1523 if (ptr->address.group) {
1524 tomoyo_set_string(head, "@");
1525 tomoyo_set_string(head, ptr->address.group->group_name
1526 ->name);
1527 } else {
1528 char buf[128];
cdcf6723 1529
059d84db
TH		 1530 tomoyo_print_ip(buf, sizeof(buf), &ptr->address);
1531 tomoyo_io_printf(head, "%s", buf);
1532 }
1533 tomoyo_print_number_union(head, &ptr->port);
1534 } else if (acl_type == TOMOYO_TYPE_UNIX_ACL) {
1535 struct tomoyo_unix_acl *ptr =
1536 container_of(acl, typeof(*ptr), head);
1537 const u8 perm = ptr->perm;
1538
1539 for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
1540 if (!(perm & (1 << bit)))
1541 continue;
1542 if (first) {
1543 tomoyo_set_group(head, "network unix ");
1544 tomoyo_set_string(head, tomoyo_proto_keyword
1545 [ptr->protocol]);
1546 tomoyo_set_space(head);
1547 first = false;
1548 } else {
1549 tomoyo_set_slash(head);
1550 }
1551 tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
1552 }
1553 if (first)
1554 return true;
1555 tomoyo_print_name_union(head, &ptr->name);
5db5a39b
TH		 1556 } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
1557 struct tomoyo_mount_acl *ptr =
1558 container_of(acl, typeof(*ptr), head);
cdcf6723 1559
0d2171d7 1560 tomoyo_set_group(head, "file mount");
f23571e8
TH		 1561 tomoyo_print_name_union(head, &ptr->dev_name);
1562 tomoyo_print_name_union(head, &ptr->dir_name);
1563 tomoyo_print_name_union(head, &ptr->fs_type);
1564 tomoyo_print_number_union(head, &ptr->flags);
d58e0da8
TH		 1565 } else if (acl_type == TOMOYO_TYPE_ENV_ACL) {
1566 struct tomoyo_env_acl *ptr =
1567 container_of(acl, typeof(*ptr), head);
1568
1569 tomoyo_set_group(head, "misc env ");
1570 tomoyo_set_string(head, ptr->env->name);
a1f9bb6a 1571 }
2066a361
TH		 1572 if (acl->cond) {
1573 head->r.print_cond_part = true;
1574 head->r.cond_step = 0;
1575 if (!tomoyo_flush(head))
1576 return false;
1577print_cond_part:
1578 if (!tomoyo_print_condition(head, acl->cond))
1579 return false;
1580 head->r.print_cond_part = false;
1581 } else {
1582 tomoyo_set_lf(head);
1583 }
f23571e8
TH		 1584 return true;
1585}
1586
1587/**
1588 * tomoyo_read_domain2 - Read domain policy.
1589 *
32997144
TH		 1590 * @head: Pointer to "struct tomoyo_io_buffer".
1591 * @list: Pointer to "struct list_head".
f23571e8
TH		 1592 *
1593 * Caller holds tomoyo_read_lock().
1594 *
1595 * Returns true on success, false otherwise.
1596 */
1597static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head,
32997144 1598 struct list_head *list)
f23571e8 1599{
32997144 1600 list_for_each_cookie(head->r.acl, list) {
f23571e8
TH		 1601 struct tomoyo_acl_info *ptr =
1602 list_entry(head->r.acl, typeof(*ptr), list);
cdcf6723 1603
f23571e8
TH		 1604 if (!tomoyo_print_entry(head, ptr))
1605 return false;
1606 }
1607 head->r.acl = NULL;
a1f9bb6a 1608 return true;
a1f9bb6a
TH		 1609}
1610
9590837b 1611/**
e2bf6907 1612 * tomoyo_read_domain - Read domain policy.
9590837b
KT		 1613 *
1614 * @head: Pointer to "struct tomoyo_io_buffer".
1615 *
fdb8ebb7 1616 * Caller holds tomoyo_read_lock().
9590837b 1617 */
e2bf6907 1618static void tomoyo_read_domain(struct tomoyo_io_buffer *head)
9590837b 1619{
f23571e8 1620 if (head->r.eof)
8fbe71f0 1621 return;
f23571e8 1622 list_for_each_cookie(head->r.domain, &tomoyo_domain_list) {
475e6fa3 1623 struct tomoyo_domain_info *domain =
f23571e8 1624 list_entry(head->r.domain, typeof(*domain), list);
cdcf6723
TH		 1625 u8 i;
1626
f23571e8
TH		 1627 switch (head->r.step) {
1628 case 0:
1629 if (domain->is_deleted &&
1630 !head->r.print_this_domain_only)
1631 continue;
1632 /* Print domainname and flags. */
1633 tomoyo_set_string(head, domain->domainname->name);
1634 tomoyo_set_lf(head);
b5bc60b4 1635 tomoyo_io_printf(head, "use_profile %u\n",
f23571e8 1636 domain->profile);
2c47ab93
TH		 1637 for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++)
1638 if (domain->flags[i])
1639 tomoyo_set_string(head, tomoyo_dif[i]);
4b425641 1640 head->r.index = 0;
f23571e8 1641 head->r.step++;
df561f66 1642 fallthrough;
f23571e8 1643 case 1:
4b425641
TH		 1644 while (head->r.index < TOMOYO_MAX_ACL_GROUPS) {
1645 i = head->r.index++;
1646 if (!test_bit(i, domain->group))
1647 continue;
1648 tomoyo_io_printf(head, "use_group %u\n", i);
1649 if (!tomoyo_flush(head))
1650 return;
1651 }
1652 head->r.index = 0;
1653 head->r.step++;
1654 tomoyo_set_lf(head);
df561f66 1655 fallthrough;
4b425641 1656 case 2:
32997144 1657 if (!tomoyo_read_domain2(head, &domain->acl_info_list))
f23571e8
TH		 1658 return;
1659 head->r.step++;
1660 if (!tomoyo_set_lf(head))
1661 return;
df561f66 1662 fallthrough;
4b425641 1663 case 3:
f23571e8
TH		 1664 head->r.step = 0;
1665 if (head->r.print_this_domain_only)
1666 goto done;
9590837b 1667 }
9590837b 1668 }
f23571e8
TH		 1669 done:
1670 head->r.eof = true;
9590837b
KT		 1671}
1672
9590837b
KT		 1673/**
1674 * tomoyo_write_pid: Specify PID to obtain domainname.
1675 *
1676 * @head: Pointer to "struct tomoyo_io_buffer".
1677 *
1678 * Returns 0.
1679 */
1680static int tomoyo_write_pid(struct tomoyo_io_buffer *head)
1681{
f23571e8 1682 head->r.eof = false;
9590837b
KT		 1683 return 0;
1684}
1685
1686/**
1687 * tomoyo_read_pid - Get domainname of the specified PID.
1688 *
1689 * @head: Pointer to "struct tomoyo_io_buffer".
1690 *
1691 * Returns the domainname which the specified PID is in on success,
1692 * empty string otherwise.
1693 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1694 * using read()/write() interface rather than sysctl() interface.
1695 */
8fbe71f0 1696static void tomoyo_read_pid(struct tomoyo_io_buffer *head)
9590837b 1697{
f23571e8
TH		 1698 char *buf = head->write_buf;
1699 bool global_pid = false;
1700 unsigned int pid;
1701 struct task_struct *p;
1702 struct tomoyo_domain_info *domain = NULL;
1703
1704 /* Accessing write_buf is safe because head->io_sem is held. */
1705 if (!buf) {
1706 head->r.eof = true;
1707 return; /* Do nothing if open(O_RDONLY). */
9590837b 1708 }
f23571e8
TH		 1709 if (head->r.w_pos || head->r.eof)
1710 return;
1711 head->r.eof = true;
1712 if (tomoyo_str_starts(&buf, "global-pid "))
1713 global_pid = true;
dbdb75bd
DX		 1714 if (kstrtouint(buf, 10, &pid))
1715 return;
f23571e8 1716 rcu_read_lock();
f23571e8
TH		 1717 if (global_pid)
1718 p = find_task_by_pid_ns(pid, &init_pid_ns);
1719 else
1720 p = find_task_by_vpid(pid);
1721 if (p)
8c6cb983 1722 domain = tomoyo_task(p)->domain_info;
f23571e8
TH		 1723 rcu_read_unlock();
1724 if (!domain)
1725 return;
1726 tomoyo_io_printf(head, "%u %u ", pid, domain->profile);
1727 tomoyo_set_string(head, domain->domainname->name);
9590837b
KT		 1728}
1729
0f2a55d5 1730/* String table for domain transition control keywords. */
5448ec4f 1731static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = {
bd03a3e4
TH		 1732 [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ",
1733 [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ",
1734 [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ",
1735 [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ",
1736 [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ",
1737 [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ",
5448ec4f
TH		 1738};
1739
0f2a55d5 1740/* String table for grouping keywords. */
e2bf6907 1741static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = {
059d84db
TH		 1742 [TOMOYO_PATH_GROUP] = "path_group ",
1743 [TOMOYO_NUMBER_GROUP] = "number_group ",
1744 [TOMOYO_ADDRESS_GROUP] = "address_group ",
e2bf6907
TH		 1745};
1746
9590837b 1747/**
e2bf6907 1748 * tomoyo_write_exception - Write exception policy.
9590837b
KT		 1749 *
1750 * @head: Pointer to "struct tomoyo_io_buffer".
1751 *
1752 * Returns 0 on success, negative value otherwise.
fdb8ebb7
TH		 1753 *
1754 * Caller holds tomoyo_read_lock().
9590837b 1755 */
e2bf6907 1756static int tomoyo_write_exception(struct tomoyo_io_buffer *head)
9590837b 1757{
bd03a3e4 1758 const bool is_delete = head->w.is_delete;
a238cf5b 1759 struct tomoyo_acl_param param = {
bd03a3e4
TH		 1760 .ns = head->w.ns,
1761 .is_delete = is_delete,
a238cf5b 1762 .data = head->write_buf,
e2bf6907 1763 };
a238cf5b 1764 u8 i;
cdcf6723 1765
a238cf5b
TH		 1766 if (tomoyo_str_starts(&param.data, "aggregator "))
1767 return tomoyo_write_aggregator(&param);
e2bf6907 1768 for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++)
a238cf5b
TH		 1769 if (tomoyo_str_starts(&param.data, tomoyo_transition_type[i]))
1770 return tomoyo_write_transition_control(&param, i);
e2bf6907 1771 for (i = 0; i < TOMOYO_MAX_GROUP; i++)
a238cf5b
TH		 1772 if (tomoyo_str_starts(&param.data, tomoyo_group_name[i]))
1773 return tomoyo_write_group(&param, i);
32997144
TH		 1774 if (tomoyo_str_starts(&param.data, "acl_group ")) {
1775 unsigned int group;
1776 char *data;
cdcf6723 1777
32997144
TH		 1778 group = simple_strtoul(param.data, &data, 10);
1779 if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ')
bd03a3e4
TH		 1780 return tomoyo_write_domain2
1781 (head->w.ns, &head->w.ns->acl_group[group],
1782 data, is_delete);
32997144 1783 }
9590837b
KT		 1784 return -EINVAL;
1785}
1786
1787/**
059d84db 1788 * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
9590837b
KT		 1789 *
1790 * @head: Pointer to "struct tomoyo_io_buffer".
31845e8c
TH		 1791 * @idx: Index number.
1792 *
1793 * Returns true on success, false otherwise.
9590837b 1794 *
fdb8ebb7 1795 * Caller holds tomoyo_read_lock().
9590837b 1796 */
31845e8c 1797static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx)
9590837b 1798{
bd03a3e4
TH		 1799 struct tomoyo_policy_namespace *ns =
1800 container_of(head->r.ns, typeof(*ns), namespace_list);
1801 struct list_head *list = &ns->group_list[idx];
cdcf6723 1802
bd03a3e4 1803 list_for_each_cookie(head->r.group, list) {
31845e8c 1804 struct tomoyo_group *group =
0df7e8b8 1805 list_entry(head->r.group, typeof(*group), head.list);
cdcf6723 1806
f23571e8 1807 list_for_each_cookie(head->r.acl, &group->member_list) {
31845e8c 1808 struct tomoyo_acl_head *ptr =
f23571e8 1809 list_entry(head->r.acl, typeof(*ptr), list);
cdcf6723 1810
31845e8c
TH		 1811 if (ptr->is_deleted)
1812 continue;
f23571e8
TH		 1813 if (!tomoyo_flush(head))
1814 return false;
bd03a3e4 1815 tomoyo_print_namespace(head);
f23571e8
TH		 1816 tomoyo_set_string(head, tomoyo_group_name[idx]);
1817 tomoyo_set_string(head, group->group_name->name);
31845e8c 1818 if (idx == TOMOYO_PATH_GROUP) {
f23571e8
TH		 1819 tomoyo_set_space(head);
1820 tomoyo_set_string(head, container_of
1821 (ptr, struct tomoyo_path_group,
1822 head)->member_name->name);
31845e8c 1823 } else if (idx == TOMOYO_NUMBER_GROUP) {
f23571e8
TH		 1824 tomoyo_print_number_union(head, &container_of
1825 (ptr,
1826 struct tomoyo_number_group,
1827 head)->number);
059d84db
TH		 1828 } else if (idx == TOMOYO_ADDRESS_GROUP) {
1829 char buffer[128];
059d84db
TH		 1830 struct tomoyo_address_group *member =
1831 container_of(ptr, typeof(*member),
1832 head);
cdcf6723 1833
059d84db
TH		 1834 tomoyo_print_ip(buffer, sizeof(buffer),
1835 &member->address);
1836 tomoyo_io_printf(head, " %s", buffer);
31845e8c 1837 }
f23571e8 1838 tomoyo_set_lf(head);
31845e8c 1839 }
f23571e8 1840 head->r.acl = NULL;
31845e8c 1841 }
f23571e8 1842 head->r.group = NULL;
31845e8c
TH		 1843 return true;
1844}
1845
1846/**
1847 * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
1848 *
1849 * @head: Pointer to "struct tomoyo_io_buffer".
1850 * @idx: Index number.
1851 *
1852 * Returns true on success, false otherwise.
1853 *
1854 * Caller holds tomoyo_read_lock().
1855 */
1856static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx)
1857{
bd03a3e4
TH		 1858 struct tomoyo_policy_namespace *ns =
1859 container_of(head->r.ns, typeof(*ns), namespace_list);
1860 struct list_head *list = &ns->policy_list[idx];
cdcf6723 1861
bd03a3e4 1862 list_for_each_cookie(head->r.acl, list) {
475e6fa3 1863 struct tomoyo_acl_head *acl =
f23571e8 1864 container_of(head->r.acl, typeof(*acl), list);
31845e8c
TH		 1865 if (acl->is_deleted)
1866 continue;
f23571e8
TH		 1867 if (!tomoyo_flush(head))
1868 return false;
31845e8c 1869 switch (idx) {
5448ec4f 1870 case TOMOYO_ID_TRANSITION_CONTROL:
31845e8c 1871 {
5448ec4f 1872 struct tomoyo_transition_control *ptr =
31845e8c 1873 container_of(acl, typeof(*ptr), head);
cdcf6723 1874
bd03a3e4 1875 tomoyo_print_namespace(head);
0d2171d7 1876 tomoyo_set_string(head, tomoyo_transition_type
f23571e8 1877 [ptr->type]);
0d2171d7
TH		 1878 tomoyo_set_string(head, ptr->program ?
1879 ptr->program->name : "any");
1880 tomoyo_set_string(head, " from ");
1881 tomoyo_set_string(head, ptr->domainname ?
1882 ptr->domainname->name :
1883 "any");
31845e8c
TH		 1884 }
1885 break;
31845e8c
TH		 1886 case TOMOYO_ID_AGGREGATOR:
1887 {
e2bf6907 1888 struct tomoyo_aggregator *ptr =
31845e8c 1889 container_of(acl, typeof(*ptr), head);
cdcf6723 1890
bd03a3e4 1891 tomoyo_print_namespace(head);
b5bc60b4 1892 tomoyo_set_string(head, "aggregator ");
f23571e8
TH		 1893 tomoyo_set_string(head,
1894 ptr->original_name->name);
1895 tomoyo_set_space(head);
1896 tomoyo_set_string(head,
1897 ptr->aggregated_name->name);
31845e8c
TH		 1898 }
1899 break;
31845e8c
TH		 1900 default:
1901 continue;
9590837b 1902 }
f23571e8 1903 tomoyo_set_lf(head);
9590837b 1904 }
f23571e8 1905 head->r.acl = NULL;
31845e8c
TH		 1906 return true;
1907}
1908
1909/**
e2bf6907 1910 * tomoyo_read_exception - Read exception policy.
31845e8c
TH		 1911 *
1912 * @head: Pointer to "struct tomoyo_io_buffer".
1913 *
1914 * Caller holds tomoyo_read_lock().
1915 */
e2bf6907 1916static void tomoyo_read_exception(struct tomoyo_io_buffer *head)
31845e8c 1917{
bd03a3e4
TH		 1918 struct tomoyo_policy_namespace *ns =
1919 container_of(head->r.ns, typeof(*ns), namespace_list);
cdcf6723 1920
f23571e8 1921 if (head->r.eof)
31845e8c 1922 return;
f23571e8
TH		 1923 while (head->r.step < TOMOYO_MAX_POLICY &&
1924 tomoyo_read_policy(head, head->r.step))
1925 head->r.step++;
1926 if (head->r.step < TOMOYO_MAX_POLICY)
31845e8c 1927 return;
f23571e8
TH		 1928 while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP &&
1929 tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY))
1930 head->r.step++;
1931 if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP)
31845e8c 1932 return;
32997144
TH		 1933 while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP
1934 + TOMOYO_MAX_ACL_GROUPS) {
1935 head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY
1936 - TOMOYO_MAX_GROUP;
bd03a3e4 1937 if (!tomoyo_read_domain2(head, &ns->acl_group
32997144
TH		 1938 [head->r.acl_group_index]))
1939 return;
1940 head->r.step++;
1941 }
f23571e8 1942 head->r.eof = true;
9590837b
KT		 1943}
1944
eadd99cc 1945/* Wait queue for kernel -> userspace notification. */
17fcfbd9 1946static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait);
eadd99cc
TH		 1947/* Wait queue for userspace -> kernel notification. */
1948static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait);
17fcfbd9
TH		 1949
1950/* Structure for query. */
e2bf6907 1951struct tomoyo_query {
17fcfbd9 1952 struct list_head list;
59df3166 1953 struct tomoyo_domain_info *domain;
17fcfbd9 1954 char *query;
eadd99cc 1955 size_t query_len;
17fcfbd9 1956 unsigned int serial;
eadd99cc
TH		 1957 u8 timer;
1958 u8 answer;
1959 u8 retry;
17fcfbd9
TH		 1960};
1961
e2bf6907 1962/* The list for "struct tomoyo_query". */
17fcfbd9
TH		 1963static LIST_HEAD(tomoyo_query_list);
1964
eadd99cc
TH		 1965/* Lock for manipulating tomoyo_query_list. */
1966static DEFINE_SPINLOCK(tomoyo_query_list_lock);
1967
17fcfbd9
TH		 1968/*
1969 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1970 * interface.
1971 */
1972static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
1973
2ca9bf45
TH		 1974/**
1975 * tomoyo_truncate - Truncate a line.
1976 *
1977 * @str: String to truncate.
1978 *
1979 * Returns length of truncated @str.
1980 */
1981static int tomoyo_truncate(char *str)
1982{
1983 char *start = str;
cdcf6723 1984
2ca9bf45
TH		 1985 while (*(unsigned char *) str > (unsigned char) ' ')
1986 str++;
1987 *str = '\0';
1988 return strlen(start) + 1;
1989}
1990
eadd99cc
TH		 1991/**
1992 * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
1993 *
1994 * @domain: Pointer to "struct tomoyo_domain_info".
1995 * @header: Lines containing ACL.
1996 *
1997 * Returns nothing.
1998 */
1999static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header)
2000{
2001 char *buffer;
2ca9bf45 2002 char *realpath = NULL;
5b636857 2003 char *argv0 = NULL;
2ca9bf45 2004 char *symlink = NULL;
eadd99cc
TH		 2005 char *cp = strchr(header, '\n');
2006 int len;
cdcf6723 2007
eadd99cc
TH		 2008 if (!cp)
2009 return;
2010 cp = strchr(cp + 1, '\n');
2011 if (!cp)
2012 return;
2013 *cp++ = '\0';
2014 len = strlen(cp) + 1;
2ca9bf45
TH		 2015 /* strstr() will return NULL if ordering is wrong. */
2016 if (*cp == 'f') {
5b636857
TH		 2017 argv0 = strstr(header, " argv[]={ \"");
2018 if (argv0) {
2019 argv0 += 10;
2020 len += tomoyo_truncate(argv0) + 14;
2021 }
2ca9bf45
TH		 2022 realpath = strstr(header, " exec={ realpath=\"");
2023 if (realpath) {
2024 realpath += 8;
2025 len += tomoyo_truncate(realpath) + 6;
2026 }
2027 symlink = strstr(header, " symlink.target=\"");
2028 if (symlink)
2029 len += tomoyo_truncate(symlink + 1) + 1;
2030 }
eadd99cc
TH		 2031 buffer = kmalloc(len, GFP_NOFS);
2032 if (!buffer)
2033 return;
2034 snprintf(buffer, len - 1, "%s", cp);
2ca9bf45
TH		 2035 if (realpath)
2036 tomoyo_addprintf(buffer, len, " exec.%s", realpath);
5b636857
TH		 2037 if (argv0)
2038 tomoyo_addprintf(buffer, len, " exec.argv[0]=%s", argv0);
2ca9bf45
TH		 2039 if (symlink)
2040 tomoyo_addprintf(buffer, len, "%s", symlink);
eadd99cc 2041 tomoyo_normalize_line(buffer);
b22b8b9f
TH		 2042 if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer,
2043 false))
2044 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
eadd99cc
TH		 2045 kfree(buffer);
2046}
2047
17fcfbd9
TH		 2048/**
2049 * tomoyo_supervisor - Ask for the supervisor's decision.
2050 *
eadd99cc
TH		 2051 * @r: Pointer to "struct tomoyo_request_info".
2052 * @fmt: The printf()'s format string, followed by parameters.
17fcfbd9
TH		 2053 *
2054 * Returns 0 if the supervisor decided to permit the access request which
2055 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
2056 * supervisor decided to retry the access request which violated the policy in
2057 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
2058 */
2059int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
2060{
2061 va_list args;
eadd99cc 2062 int error;
17fcfbd9
TH		 2063 int len;
2064 static unsigned int tomoyo_serial;
eadd99cc 2065 struct tomoyo_query entry = { };
17fcfbd9 2066 bool quota_exceeded = false;
cdcf6723 2067
eadd99cc
TH		 2068 va_start(args, fmt);
2069 len = vsnprintf((char *) &len, 1, fmt, args) + 1;
2070 va_end(args);
2071 /* Write /sys/kernel/security/tomoyo/audit. */
2072 va_start(args, fmt);
2073 tomoyo_write_log2(r, len, fmt, args);
2074 va_end(args);
2075 /* Nothing more to do if granted. */
2076 if (r->granted)
2077 return 0;
b22b8b9f
TH		 2078 if (r->mode)
2079 tomoyo_update_stat(r->mode);
17fcfbd9 2080 switch (r->mode) {
eadd99cc
TH		 2081 case TOMOYO_CONFIG_ENFORCING:
2082 error = -EPERM;
2083 if (atomic_read(&tomoyo_query_observers))
2084 break;
2085 goto out;
17fcfbd9 2086 case TOMOYO_CONFIG_LEARNING:
eadd99cc
TH		 2087 error = 0;
2088 /* Check max_learning_entry parameter. */
2089 if (tomoyo_domain_quota_is_ok(r))
2090 break;
df561f66 2091 fallthrough;
eadd99cc 2092 default:
17fcfbd9
TH		 2093 return 0;
2094 }
eadd99cc 2095 /* Get message. */
17fcfbd9 2096 va_start(args, fmt);
eadd99cc 2097 entry.query = tomoyo_init_log(r, len, fmt, args);
17fcfbd9 2098 va_end(args);
eadd99cc 2099 if (!entry.query)
17fcfbd9 2100 goto out;
eadd99cc
TH		 2101 entry.query_len = strlen(entry.query) + 1;
2102 if (!error) {
2103 tomoyo_add_entry(r->domain, entry.query);
17fcfbd9 2104 goto out;
eadd99cc
TH		 2105 }
2106 len = tomoyo_round2(entry.query_len);
59df3166 2107 entry.domain = r->domain;
17fcfbd9 2108 spin_lock(&tomoyo_query_list_lock);
eadd99cc
TH		 2109 if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] &&
2110 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len
2111 >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) {
17fcfbd9
TH		 2112 quota_exceeded = true;
2113 } else {
eadd99cc
TH		 2114 entry.serial = tomoyo_serial++;
2115 entry.retry = r->retry;
2116 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len;
2117 list_add_tail(&entry.list, &tomoyo_query_list);
17fcfbd9
TH		 2118 }
2119 spin_unlock(&tomoyo_query_list_lock);
2120 if (quota_exceeded)
2121 goto out;
17fcfbd9 2122 /* Give 10 seconds for supervisor's opinion. */
eadd99cc
TH		 2123 while (entry.timer < 10) {
2124 wake_up_all(&tomoyo_query_wait);
2125 if (wait_event_interruptible_timeout
2126 (tomoyo_answer_wait, entry.answer ||
2127 !atomic_read(&tomoyo_query_observers), HZ))
17fcfbd9 2128 break;
cdcf6723 2129 entry.timer++;
17fcfbd9
TH		 2130 }
2131 spin_lock(&tomoyo_query_list_lock);
eadd99cc
TH		 2132 list_del(&entry.list);
2133 tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len;
17fcfbd9 2134 spin_unlock(&tomoyo_query_list_lock);
eadd99cc 2135 switch (entry.answer) {
17fcfbd9
TH		 2136 case 3: /* Asked to retry by administrator. */
2137 error = TOMOYO_RETRY_REQUEST;
2138 r->retry++;
2139 break;
2140 case 1:
2141 /* Granted by administrator. */
2142 error = 0;
2143 break;
17fcfbd9 2144 default:
eadd99cc 2145 /* Timed out or rejected by administrator. */
17fcfbd9
TH		 2146 break;
2147 }
eadd99cc
TH		 2148out:
2149 kfree(entry.query);
17fcfbd9
TH		 2150 return error;
2151}
2152
59df3166
TH		 2153/**
2154 * tomoyo_find_domain_by_qid - Get domain by query id.
2155 *
2156 * @serial: Query ID assigned by tomoyo_supervisor().
2157 *
2158 * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
2159 */
2160static struct tomoyo_domain_info *tomoyo_find_domain_by_qid
2161(unsigned int serial)
2162{
2163 struct tomoyo_query *ptr;
2164 struct tomoyo_domain_info *domain = NULL;
cdcf6723 2165
59df3166
TH		 2166 spin_lock(&tomoyo_query_list_lock);
2167 list_for_each_entry(ptr, &tomoyo_query_list, list) {
6041e834 2168 if (ptr->serial != serial)
59df3166
TH		 2169 continue;
2170 domain = ptr->domain;
2171 break;
2172 }
2173 spin_unlock(&tomoyo_query_list_lock);
2174 return domain;
2175}
2176
17fcfbd9
TH		 2177/**
2178 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
2179 *
2180 * @file: Pointer to "struct file".
2181 * @wait: Pointer to "poll_table".
2182 *
a9a08845 2183 * Returns EPOLLIN | EPOLLRDNORM when ready to read, 0 otherwise.
17fcfbd9
TH		 2184 *
2185 * Waits for access requests which violated policy in enforcing mode.
2186 */
c0d4be28 2187static __poll_t tomoyo_poll_query(struct file *file, poll_table *wait)
17fcfbd9 2188{
6041e834 2189 if (!list_empty(&tomoyo_query_list))
a9a08845 2190 return EPOLLIN | EPOLLRDNORM;
6041e834
TH		 2191 poll_wait(file, &tomoyo_query_wait, wait);
2192 if (!list_empty(&tomoyo_query_list))
a9a08845 2193 return EPOLLIN | EPOLLRDNORM;
17fcfbd9
TH		 2194 return 0;
2195}
2196
2197/**
2198 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
2199 *
2200 * @head: Pointer to "struct tomoyo_io_buffer".
17fcfbd9 2201 */
8fbe71f0 2202static void tomoyo_read_query(struct tomoyo_io_buffer *head)
17fcfbd9
TH		 2203{
2204 struct list_head *tmp;
2c47ab93
TH		 2205 unsigned int pos = 0;
2206 size_t len = 0;
17fcfbd9 2207 char *buf;
cdcf6723 2208
f23571e8 2209 if (head->r.w_pos)
8fbe71f0 2210 return;
cdcf6723
TH		 2211 kfree(head->read_buf);
2212 head->read_buf = NULL;
17fcfbd9
TH		 2213 spin_lock(&tomoyo_query_list_lock);
2214 list_for_each(tmp, &tomoyo_query_list) {
e2bf6907 2215 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
cdcf6723 2216
f23571e8 2217 if (pos++ != head->r.query_index)
17fcfbd9
TH		 2218 continue;
2219 len = ptr->query_len;
2220 break;
2221 }
2222 spin_unlock(&tomoyo_query_list_lock);
2223 if (!len) {
f23571e8 2224 head->r.query_index = 0;
8fbe71f0 2225 return;
17fcfbd9 2226 }
eadd99cc 2227 buf = kzalloc(len + 32, GFP_NOFS);
17fcfbd9 2228 if (!buf)
8fbe71f0 2229 return;
17fcfbd9
TH		 2230 pos = 0;
2231 spin_lock(&tomoyo_query_list_lock);
2232 list_for_each(tmp, &tomoyo_query_list) {
e2bf6907 2233 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
cdcf6723 2234
f23571e8 2235 if (pos++ != head->r.query_index)
17fcfbd9
TH		 2236 continue;
2237 /*
2238 * Some query can be skipped because tomoyo_query_list
2239 * can change, but I don't care.
2240 */
2241 if (len == ptr->query_len)
eadd99cc
TH		 2242 snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial,
2243 ptr->retry, ptr->query);
17fcfbd9
TH		 2244 break;
2245 }
2246 spin_unlock(&tomoyo_query_list_lock);
2247 if (buf[0]) {
17fcfbd9 2248 head->read_buf = buf;
f23571e8
TH		 2249 head->r.w[head->r.w_pos++] = buf;
2250 head->r.query_index++;
17fcfbd9
TH		 2251 } else {
2252 kfree(buf);
2253 }
17fcfbd9
TH		 2254}
2255
2256/**
2257 * tomoyo_write_answer - Write the supervisor's decision.
2258 *
2259 * @head: Pointer to "struct tomoyo_io_buffer".
2260 *
2261 * Returns 0 on success, -EINVAL otherwise.
2262 */
2263static int tomoyo_write_answer(struct tomoyo_io_buffer *head)
2264{
2265 char *data = head->write_buf;
2266 struct list_head *tmp;
2267 unsigned int serial;
2268 unsigned int answer;
cdcf6723 2269
17fcfbd9
TH		 2270 spin_lock(&tomoyo_query_list_lock);
2271 list_for_each(tmp, &tomoyo_query_list) {
e2bf6907 2272 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
cdcf6723 2273
17fcfbd9
TH		 2274 ptr->timer = 0;
2275 }
2276 spin_unlock(&tomoyo_query_list_lock);
2277 if (sscanf(data, "A%u=%u", &serial, &answer) != 2)
2278 return -EINVAL;
2279 spin_lock(&tomoyo_query_list_lock);
2280 list_for_each(tmp, &tomoyo_query_list) {
e2bf6907 2281 struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
cdcf6723 2282
17fcfbd9
TH		 2283 if (ptr->serial != serial)
2284 continue;
6041e834
TH		 2285 ptr->answer = answer;
2286 /* Remove from tomoyo_query_list. */
2287 if (ptr->answer)
2288 list_del_init(&ptr->list);
17fcfbd9
TH		 2289 break;
2290 }
2291 spin_unlock(&tomoyo_query_list_lock);
2292 return 0;
2293}
2294
9590837b
KT		 2295/**
2296 * tomoyo_read_version: Get version.
2297 *
2298 * @head: Pointer to "struct tomoyo_io_buffer".
2299 *
2300 * Returns version information.
2301 */
8fbe71f0 2302static void tomoyo_read_version(struct tomoyo_io_buffer *head)
9590837b 2303{
f23571e8 2304 if (!head->r.eof) {
861f4bcf 2305 tomoyo_io_printf(head, "2.6.0");
f23571e8 2306 head->r.eof = true;
9590837b 2307 }
9590837b
KT		 2308}
2309
b22b8b9f
TH		 2310/* String table for /sys/kernel/security/tomoyo/stat interface. */
2311static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = {
2312 [TOMOYO_STAT_POLICY_UPDATES] = "update:",
2313 [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:",
2314 [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:",
2315 [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:",
2316};
2317
2318/* String table for /sys/kernel/security/tomoyo/stat interface. */
2319static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = {
2320 [TOMOYO_MEMORY_POLICY] = "policy:",
2321 [TOMOYO_MEMORY_AUDIT] = "audit log:",
2322 [TOMOYO_MEMORY_QUERY] = "query message:",
2323};
2324
b22b8b9f 2325/* Counter for number of updates. */
a8772fad
TH		 2326static atomic_t tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT];
2327/* Timestamp counter for last updated. */
92734092 2328static time64_t tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT];
b22b8b9f
TH		 2329
2330/**
2331 * tomoyo_update_stat - Update statistic counters.
2332 *
2333 * @index: Index for policy type.
2334 *
2335 * Returns nothing.
2336 */
2337void tomoyo_update_stat(const u8 index)
2338{
a8772fad 2339 atomic_inc(&tomoyo_stat_updated[index]);
92734092 2340 tomoyo_stat_modified[index] = ktime_get_real_seconds();
b22b8b9f
TH		 2341}
2342
2343/**
2344 * tomoyo_read_stat - Read statistic data.
2345 *
2346 * @head: Pointer to "struct tomoyo_io_buffer".
2347 *
2348 * Returns nothing.
2349 */
2350static void tomoyo_read_stat(struct tomoyo_io_buffer *head)
2351{
2352 u8 i;
2353 unsigned int total = 0;
cdcf6723 2354
b22b8b9f
TH		 2355 if (head->r.eof)
2356 return;
2357 for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) {
2358 tomoyo_io_printf(head, "Policy %-30s %10u",
2359 tomoyo_policy_headers[i],
a8772fad 2360 atomic_read(&tomoyo_stat_updated[i]));
b22b8b9f
TH		 2361 if (tomoyo_stat_modified[i]) {
2362 struct tomoyo_time stamp;
cdcf6723 2363
b22b8b9f 2364 tomoyo_convert_time(tomoyo_stat_modified[i], &stamp);
cdcf6723 2365 tomoyo_io_printf(head, " (Last: %04u/%02u/%02u %02u:%02u:%02u)",
b22b8b9f
TH		 2366 stamp.year, stamp.month, stamp.day,
2367 stamp.hour, stamp.min, stamp.sec);
2368 }
2369 tomoyo_set_lf(head);
2370 }
2371 for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) {
2372 unsigned int used = tomoyo_memory_used[i];
cdcf6723 2373
b22b8b9f
TH		 2374 total += used;
2375 tomoyo_io_printf(head, "Memory used by %-22s %10u",
2376 tomoyo_memory_headers[i], used);
2377 used = tomoyo_memory_quota[i];
2378 if (used)
2379 tomoyo_io_printf(head, " (Quota: %10u)", used);
2380 tomoyo_set_lf(head);
2381 }
2382 tomoyo_io_printf(head, "Total memory used: %10u\n",
2383 total);
2384 head->r.eof = true;
2385}
2386
2387/**
2388 * tomoyo_write_stat - Set memory quota.
2389 *
2390 * @head: Pointer to "struct tomoyo_io_buffer".
2391 *
2392 * Returns 0.
2393 */
2394static int tomoyo_write_stat(struct tomoyo_io_buffer *head)
2395{
2396 char *data = head->write_buf;
2397 u8 i;
cdcf6723 2398
b22b8b9f
TH		 2399 if (tomoyo_str_starts(&data, "Memory used by "))
2400 for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++)
2401 if (tomoyo_str_starts(&data, tomoyo_memory_headers[i]))
2402 sscanf(data, "%u", &tomoyo_memory_quota[i]);
2403 return 0;
2404}
2405
9590837b
KT		 2406/**
2407 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
2408 *
2409 * @type: Type of interface.
2410 * @file: Pointer to "struct file".
2411 *
2e503bbb 2412 * Returns 0 on success, negative value otherwise.
9590837b 2413 */
c3ef1500 2414int tomoyo_open_control(const u8 type, struct file *file)
9590837b 2415{
4e5d6f7e 2416 struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS);
9590837b
KT		 2417
2418 if (!head)
2419 return -ENOMEM;
2420 mutex_init(&head->io_sem);
17fcfbd9 2421 head->type = type;
9590837b
KT		 2422 switch (type) {
2423 case TOMOYO_DOMAINPOLICY:
2424 /* /sys/kernel/security/tomoyo/domain_policy */
e2bf6907
TH		 2425 head->write = tomoyo_write_domain;
2426 head->read = tomoyo_read_domain;
9590837b
KT		 2427 break;
2428 case TOMOYO_EXCEPTIONPOLICY:
2429 /* /sys/kernel/security/tomoyo/exception_policy */
e2bf6907
TH		 2430 head->write = tomoyo_write_exception;
2431 head->read = tomoyo_read_exception;
9590837b 2432 break;
eadd99cc
TH		 2433 case TOMOYO_AUDIT:
2434 /* /sys/kernel/security/tomoyo/audit */
2435 head->poll = tomoyo_poll_log;
2436 head->read = tomoyo_read_log;
2437 break;
9590837b
KT		 2438 case TOMOYO_PROCESS_STATUS:
2439 /* /sys/kernel/security/tomoyo/.process_status */
2440 head->write = tomoyo_write_pid;
2441 head->read = tomoyo_read_pid;
2442 break;
2443 case TOMOYO_VERSION:
2444 /* /sys/kernel/security/tomoyo/version */
2445 head->read = tomoyo_read_version;
2446 head->readbuf_size = 128;
2447 break;
b22b8b9f
TH		 2448 case TOMOYO_STAT:
2449 /* /sys/kernel/security/tomoyo/stat */
2450 head->write = tomoyo_write_stat;
2451 head->read = tomoyo_read_stat;
2452 head->readbuf_size = 1024;
9590837b
KT		 2453 break;
2454 case TOMOYO_PROFILE:
2455 /* /sys/kernel/security/tomoyo/profile */
2456 head->write = tomoyo_write_profile;
2457 head->read = tomoyo_read_profile;
2458 break;
17fcfbd9
TH		 2459 case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */
2460 head->poll = tomoyo_poll_query;
2461 head->write = tomoyo_write_answer;
2462 head->read = tomoyo_read_query;
2463 break;
9590837b
KT		 2464 case TOMOYO_MANAGER:
2465 /* /sys/kernel/security/tomoyo/manager */
e2bf6907
TH		 2466 head->write = tomoyo_write_manager;
2467 head->read = tomoyo_read_manager;
9590837b
KT		 2468 break;
2469 }
2470 if (!(file->f_mode & FMODE_READ)) {
2471 /*
2472 * No need to allocate read_buf since it is not opened
2473 * for reading.
2474 */
2475 head->read = NULL;
17fcfbd9
TH		 2476 head->poll = NULL;
2477 } else if (!head->poll) {
2478 /* Don't allocate read_buf for poll() access. */
9590837b
KT		 2479 if (!head->readbuf_size)
2480 head->readbuf_size = 4096 * 2;
4e5d6f7e 2481 head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS);
9590837b 2482 if (!head->read_buf) {
8e2d39a1 2483 kfree(head);
9590837b
KT		 2484 return -ENOMEM;
2485 }
2486 }
2487 if (!(file->f_mode & FMODE_WRITE)) {
2488 /*
2489 * No need to allocate write_buf since it is not opened
2490 * for writing.
2491 */
2492 head->write = NULL;
2493 } else if (head->write) {
2494 head->writebuf_size = 4096 * 2;
4e5d6f7e 2495 head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS);
9590837b 2496 if (!head->write_buf) {
8e2d39a1
TH		 2497 kfree(head->read_buf);
2498 kfree(head);
9590837b
KT		 2499 return -ENOMEM;
2500 }
2501 }
17fcfbd9
TH		 2502 /*
2503 * If the file is /sys/kernel/security/tomoyo/query , increment the
2504 * observer counter.
2505 * The obserber counter is used by tomoyo_supervisor() to see if
2506 * there is some process monitoring /sys/kernel/security/tomoyo/query.
2507 */
7c75964f 2508 if (type == TOMOYO_QUERY)
17fcfbd9 2509 atomic_inc(&tomoyo_query_observers);
2e503bbb
TH		 2510 file->private_data = head;
2511 tomoyo_notify_gc(head, true);
9590837b
KT		 2512 return 0;
2513}
2514
0849e3ba
TH		 2515/**
2516 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
2517 *
2518 * @file: Pointer to "struct file".
6041e834 2519 * @wait: Pointer to "poll_table". Maybe NULL.
0849e3ba 2520 *
a9a08845
LT		 2521 * Returns EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM if ready to read/write,
2522 * EPOLLOUT | EPOLLWRNORM otherwise.
0849e3ba 2523 */
c0d4be28 2524__poll_t tomoyo_poll_control(struct file *file, poll_table *wait)
0849e3ba
TH		 2525{
2526 struct tomoyo_io_buffer *head = file->private_data;
cdcf6723 2527
6041e834 2528 if (head->poll)
a9a08845
LT		 2529 return head->poll(file, wait) | EPOLLOUT | EPOLLWRNORM;
2530 return EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM;
0849e3ba
TH		 2531}
2532
bd03a3e4
TH		 2533/**
2534 * tomoyo_set_namespace_cursor - Set namespace to read.
2535 *
2536 * @head: Pointer to "struct tomoyo_io_buffer".
2537 *
2538 * Returns nothing.
2539 */
2540static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head)
2541{
2542 struct list_head *ns;
cdcf6723 2543
bd03a3e4
TH		 2544 if (head->type != TOMOYO_EXCEPTIONPOLICY &&
2545 head->type != TOMOYO_PROFILE)
2546 return;
2547 /*
2548 * If this is the first read, or reading previous namespace finished
2549 * and has more namespaces to read, update the namespace cursor.
2550 */
2551 ns = head->r.ns;
2552 if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) {
2553 /* Clearing is OK because tomoyo_flush() returned true. */
2554 memset(&head->r, 0, sizeof(head->r));
2555 head->r.ns = ns ? ns->next : tomoyo_namespace_list.next;
2556 }
2557}
2558
2559/**
2560 * tomoyo_has_more_namespace - Check for unread namespaces.
2561 *
2562 * @head: Pointer to "struct tomoyo_io_buffer".
2563 *
2564 * Returns true if we have more entries to print, false otherwise.
2565 */
2566static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head)
2567{
2568 return (head->type == TOMOYO_EXCEPTIONPOLICY ||
2569 head->type == TOMOYO_PROFILE) && head->r.eof &&
2570 head->r.ns->next != &tomoyo_namespace_list;
2571}
2572
9590837b
KT		 2573/**
2574 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
2575 *
0df7e8b8 2576 * @head: Pointer to "struct tomoyo_io_buffer".
15269fb1 2577 * @buffer: Pointer to buffer to write to.
9590837b
KT		 2578 * @buffer_len: Size of @buffer.
2579 *
2580 * Returns bytes read on success, negative value otherwise.
2581 */
2c47ab93
TH		 2582ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
2583 const int buffer_len)
9590837b 2584{
f23571e8 2585 int len;
2e503bbb 2586 int idx;
9590837b
KT		 2587
2588 if (!head->read)
cdcf6723 2589 return -EINVAL;
9590837b
KT		 2590 if (mutex_lock_interruptible(&head->io_sem))
2591 return -EINTR;
f23571e8
TH		 2592 head->read_user_buf = buffer;
2593 head->read_user_buf_avail = buffer_len;
2e503bbb 2594 idx = tomoyo_read_lock();
f23571e8
TH		 2595 if (tomoyo_flush(head))
2596 /* Call the policy handler. */
bd03a3e4
TH		 2597 do {
2598 tomoyo_set_namespace_cursor(head);
2599 head->read(head);
2600 } while (tomoyo_flush(head) &&
2601 tomoyo_has_more_namespace(head));
2e503bbb 2602 tomoyo_read_unlock(idx);
f23571e8 2603 len = head->read_user_buf - buffer;
9590837b
KT		 2604 mutex_unlock(&head->io_sem);
2605 return len;
2606}
2607
bd03a3e4
TH		 2608/**
2609 * tomoyo_parse_policy - Parse a policy line.
2610 *
15269fb1 2611 * @head: Pointer to "struct tomoyo_io_buffer".
bd03a3e4
TH		 2612 * @line: Line to parse.
2613 *
2614 * Returns 0 on success, negative value otherwise.
2615 *
2616 * Caller holds tomoyo_read_lock().
2617 */
2618static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line)
2619{
2620 /* Delete request? */
2621 head->w.is_delete = !strncmp(line, "delete ", 7);
2622 if (head->w.is_delete)
2623 memmove(line, line + 7, strlen(line + 7) + 1);
2624 /* Selecting namespace to update. */
2625 if (head->type == TOMOYO_EXCEPTIONPOLICY ||
2626 head->type == TOMOYO_PROFILE) {
2627 if (*line == '<') {
2628 char *cp = strchr(line, ' ');
cdcf6723 2629
bd03a3e4
TH		 2630 if (cp) {
2631 *cp++ = '\0';
2632 head->w.ns = tomoyo_assign_namespace(line);
2633 memmove(line, cp, strlen(cp) + 1);
2634 } else
2635 head->w.ns = NULL;
2636 } else
2637 head->w.ns = &tomoyo_kernel_namespace;
2638 /* Don't allow updating if namespace is invalid. */
2639 if (!head->w.ns)
2640 return -ENOENT;
2641 }
2642 /* Do the update. */
2643 return head->write(head);
2644}
2645
9590837b
KT		 2646/**
2647 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
2648 *
0df7e8b8 2649 * @head: Pointer to "struct tomoyo_io_buffer".
9590837b
KT		 2650 * @buffer: Pointer to buffer to read from.
2651 * @buffer_len: Size of @buffer.
2652 *
2653 * Returns @buffer_len on success, negative value otherwise.
2654 */
2c47ab93
TH		 2655ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
2656 const char __user *buffer, const int buffer_len)
9590837b 2657{
9590837b 2658 int error = buffer_len;
bd03a3e4 2659 size_t avail_len = buffer_len;
9590837b 2660 char *cp0 = head->write_buf;
2e503bbb 2661 int idx;
cdcf6723 2662
9590837b 2663 if (!head->write)
cdcf6723 2664 return -EINVAL;
9590837b
KT		 2665 if (mutex_lock_interruptible(&head->io_sem))
2666 return -EINTR;
e0b057b4 2667 head->read_user_buf_avail = 0;
2e503bbb 2668 idx = tomoyo_read_lock();
9590837b
KT		 2669 /* Read a line and dispatch it to the policy handler. */
2670 while (avail_len > 0) {
2671 char c;
cdcf6723 2672
0df7e8b8 2673 if (head->w.avail >= head->writebuf_size - 1) {
bd03a3e4
TH		 2674 const int len = head->writebuf_size * 2;
2675 char *cp = kzalloc(len, GFP_NOFS);
cdcf6723 2676
bd03a3e4
TH		 2677 if (!cp) {
2678 error = -ENOMEM;
2679 break;
2680 }
2681 memmove(cp, cp0, head->w.avail);
2682 kfree(cp0);
2683 head->write_buf = cp;
2684 cp0 = cp;
2685 head->writebuf_size = len;
2686 }
2687 if (get_user(c, buffer)) {
9590837b
KT		 2688 error = -EFAULT;
2689 break;
2690 }
2691 buffer++;
2692 avail_len--;
0df7e8b8 2693 cp0[head->w.avail++] = c;
9590837b
KT		 2694 if (c != '\n')
2695 continue;
0df7e8b8
TH		 2696 cp0[head->w.avail - 1] = '\0';
2697 head->w.avail = 0;
9590837b 2698 tomoyo_normalize_line(cp0);
bd03a3e4
TH		 2699 if (!strcmp(cp0, "reset")) {
2700 head->w.ns = &tomoyo_kernel_namespace;
2701 head->w.domain = NULL;
2702 memset(&head->r, 0, sizeof(head->r));
2703 continue;
2704 }
2705 /* Don't allow updating policies by non manager programs. */
2706 switch (head->type) {
2707 case TOMOYO_PROCESS_STATUS:
2708 /* This does not write anything. */
2709 break;
2710 case TOMOYO_DOMAINPOLICY:
2711 if (tomoyo_select_domain(head, cp0))
2712 continue;
df561f66 2713 fallthrough;
bd03a3e4
TH		 2714 case TOMOYO_EXCEPTIONPOLICY:
2715 if (!strcmp(cp0, "select transition_only")) {
2716 head->r.print_transition_related_only = true;
2717 continue;
2718 }
df561f66 2719 fallthrough;
bd03a3e4
TH		 2720 default:
2721 if (!tomoyo_manager()) {
2722 error = -EPERM;
2723 goto out;
2724 }
2725 }
2726 switch (tomoyo_parse_policy(head, cp0)) {
2727 case -EPERM:
2728 error = -EPERM;
2729 goto out;
b22b8b9f
TH		 2730 case 0:
2731 switch (head->type) {
2732 case TOMOYO_DOMAINPOLICY:
2733 case TOMOYO_EXCEPTIONPOLICY:
b22b8b9f
TH		 2734 case TOMOYO_STAT:
2735 case TOMOYO_PROFILE:
2736 case TOMOYO_MANAGER:
2737 tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
2738 break;
2739 default:
2740 break;
2741 }
2742 break;
bd03a3e4 2743 }
9590837b 2744 }
bd03a3e4 2745out:
2e503bbb 2746 tomoyo_read_unlock(idx);
9590837b
KT		 2747 mutex_unlock(&head->io_sem);
2748 return error;
2749}
2750
2751/**
2752 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
2753 *
0df7e8b8 2754 * @head: Pointer to "struct tomoyo_io_buffer".
9590837b 2755 */
e53cfda5 2756void tomoyo_close_control(struct tomoyo_io_buffer *head)
9590837b 2757{
17fcfbd9
TH		 2758 /*
2759 * If the file is /sys/kernel/security/tomoyo/query , decrement the
2760 * observer counter.
2761 */
2e503bbb
TH		 2762 if (head->type == TOMOYO_QUERY &&
2763 atomic_dec_and_test(&tomoyo_query_observers))
2764 wake_up_all(&tomoyo_answer_wait);
2765 tomoyo_notify_gc(head, false);
9590837b
KT		 2766}
2767
9590837b 2768/**
c3ef1500 2769 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
9590837b 2770 */
c3ef1500 2771void tomoyo_check_profile(void)
9590837b 2772{
c3ef1500
TH		 2773 struct tomoyo_domain_info *domain;
2774 const int idx = tomoyo_read_lock();
cdcf6723 2775
c3ef1500 2776 tomoyo_policy_loaded = true;
861f4bcf 2777 pr_info("TOMOYO: 2.6.0\n");
6bd5ce60
TH		 2778 list_for_each_entry_rcu(domain, &tomoyo_domain_list, list,
2779 srcu_read_lock_held(&tomoyo_ss)) {
c3ef1500 2780 const u8 profile = domain->profile;
861f4bcf 2781 struct tomoyo_policy_namespace *ns = domain->ns;
cdcf6723 2782
861f4bcf
TH		 2783 if (ns->profile_version == 20110903) {
2784 pr_info_once("Converting profile version from %u to %u.\n",
2785 20110903, 20150505);
2786 ns->profile_version = 20150505;
2787 }
2788 if (ns->profile_version != 20150505)
cdcf6723 2789 pr_err("Profile version %u is not supported.\n",
bd03a3e4
TH		 2790 ns->profile_version);
2791 else if (!ns->profile_ptr[profile])
cdcf6723 2792 pr_err("Profile %u (used by '%s') is not defined.\n",
bd03a3e4
TH		 2793 profile, domain->domainname->name);
2794 else
c3ef1500 2795 continue;
861f4bcf
TH		 2796 pr_err("Userland tools for TOMOYO 2.6 must be installed and policy must be initialized.\n");
2797 pr_err("Please see https://tomoyo.osdn.jp/2.6/ for more information.\n");
bd03a3e4 2798 panic("STOP!");
c3ef1500
TH		 2799 }
2800 tomoyo_read_unlock(idx);
cdcf6723 2801 pr_info("Mandatory Access Control activated.\n");
9590837b 2802}
efe836ab
TH		 2803
2804/**
2805 * tomoyo_load_builtin_policy - Load built-in policy.
2806 *
2807 * Returns nothing.
2808 */
2809void __init tomoyo_load_builtin_policy(void)
2810{
e80b1859
TH		 2811#ifdef CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING
2812 static char tomoyo_builtin_profile[] __initdata =
2813 "PROFILE_VERSION=20150505\n"
2814 "0-CONFIG={ mode=learning grant_log=no reject_log=yes }\n";
2815 static char tomoyo_builtin_exception_policy[] __initdata =
2816 "aggregator proc:/self/exe /proc/self/exe\n";
2817 static char tomoyo_builtin_domain_policy[] __initdata = "";
2818 static char tomoyo_builtin_manager[] __initdata = "";
2819 static char tomoyo_builtin_stat[] __initdata = "";
2820#else
efe836ab
TH		 2821 /*
2822 * This include file is manually created and contains built-in policy
2823 * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy",
2824 * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager",
2825 * "tomoyo_builtin_stat" in the form of "static char [] __initdata".
2826 */
2827#include "builtin-policy.h"
e80b1859 2828#endif
efe836ab
TH		 2829 u8 i;
2830 const int idx = tomoyo_read_lock();
cdcf6723 2831
efe836ab
TH		 2832 for (i = 0; i < 5; i++) {
2833 struct tomoyo_io_buffer head = { };
2834 char *start = "";
cdcf6723 2835
efe836ab
TH		 2836 switch (i) {
2837 case 0:
2838 start = tomoyo_builtin_profile;
2839 head.type = TOMOYO_PROFILE;
2840 head.write = tomoyo_write_profile;
2841 break;
2842 case 1:
2843 start = tomoyo_builtin_exception_policy;
2844 head.type = TOMOYO_EXCEPTIONPOLICY;
2845 head.write = tomoyo_write_exception;
2846 break;
2847 case 2:
2848 start = tomoyo_builtin_domain_policy;
2849 head.type = TOMOYO_DOMAINPOLICY;
2850 head.write = tomoyo_write_domain;
2851 break;
2852 case 3:
2853 start = tomoyo_builtin_manager;
2854 head.type = TOMOYO_MANAGER;
2855 head.write = tomoyo_write_manager;
2856 break;
2857 case 4:
2858 start = tomoyo_builtin_stat;
2859 head.type = TOMOYO_STAT;
2860 head.write = tomoyo_write_stat;
2861 break;
2862 }
2863 while (1) {
2864 char *end = strchr(start, '\n');
cdcf6723 2865
efe836ab
TH		 2866 if (!end)
2867 break;
2868 *end = '\0';
2869 tomoyo_normalize_line(start);
2870 head.write_buf = start;
2871 tomoyo_parse_policy(&head, start);
2872 start = end + 1;
2873 }
2874 }
2875 tomoyo_read_unlock(idx);
0e4ae0e0
TH		 2876#ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
2877 tomoyo_check_profile();
2878#endif
efe836ab 2879}
Linux 6.x block layer and io_uring tree(s)