Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
f7433243 KT |
2 | /* |
3 | * security/tomoyo/tomoyo.c | |
4 | * | |
0f2a55d5 | 5 | * Copyright (C) 2005-2011 NTT DATA CORPORATION |
f7433243 KT |
6 | */ |
7 | ||
3c4ed7bd | 8 | #include <linux/lsm_hooks.h> |
f7433243 | 9 | #include "common.h" |
f7433243 | 10 | |
0f2a55d5 | 11 | /** |
8c6cb983 | 12 | * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread. |
0f2a55d5 | 13 | * |
8c6cb983 | 14 | * Returns pointer to "struct tomoyo_domain_info" for current thread. |
0f2a55d5 | 15 | */ |
8c6cb983 | 16 | struct tomoyo_domain_info *tomoyo_domain(void) |
ee18d64c | 17 | { |
8c6cb983 | 18 | struct tomoyo_task *s = tomoyo_task(current); |
43fc4609 | 19 | |
8c6cb983 TH |
20 | if (s->old_domain_info && !current->in_execve) { |
21 | atomic_dec(&s->old_domain_info->users); | |
22 | s->old_domain_info = NULL; | |
23 | } | |
24 | return s->domain_info; | |
ee18d64c DH |
25 | } |
26 | ||
0f2a55d5 TH |
27 | /** |
28 | * tomoyo_cred_prepare - Target for security_prepare_creds(). | |
29 | * | |
30 | * @new: Pointer to "struct cred". | |
31 | * @old: Pointer to "struct cred". | |
32 | * @gfp: Memory allocation flags. | |
33 | * | |
34 | * Returns 0. | |
35 | */ | |
f7433243 KT |
36 | static int tomoyo_cred_prepare(struct cred *new, const struct cred *old, |
37 | gfp_t gfp) | |
38 | { | |
8c6cb983 TH |
39 | /* Restore old_domain_info saved by previous execve() request. */ |
40 | struct tomoyo_task *s = tomoyo_task(current); | |
43fc4609 | 41 | |
8c6cb983 TH |
42 | if (s->old_domain_info && !current->in_execve) { |
43 | atomic_dec(&s->domain_info->users); | |
44 | s->domain_info = s->old_domain_info; | |
45 | s->old_domain_info = NULL; | |
46 | } | |
f7433243 KT |
47 | return 0; |
48 | } | |
49 | ||
0f2a55d5 | 50 | /** |
8c6cb983 | 51 | * tomoyo_bprm_committed_creds - Target for security_bprm_committed_creds(). |
0f2a55d5 | 52 | * |
8c6cb983 | 53 | * @bprm: Pointer to "struct linux_binprm". |
0f2a55d5 | 54 | */ |
8c6cb983 | 55 | static void tomoyo_bprm_committed_creds(struct linux_binprm *bprm) |
ec8e6a4e | 56 | { |
8c6cb983 TH |
57 | /* Clear old_domain_info saved by execve() request. */ |
58 | struct tomoyo_task *s = tomoyo_task(current); | |
43fc4609 | 59 | |
8c6cb983 TH |
60 | atomic_dec(&s->old_domain_info->users); |
61 | s->old_domain_info = NULL; | |
ee18d64c DH |
62 | } |
63 | ||
8c6cb983 | 64 | #ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER |
0f2a55d5 TH |
65 | /** |
66 | * tomoyo_bprm_set_creds - Target for security_bprm_set_creds(). | |
67 | * | |
68 | * @bprm: Pointer to "struct linux_binprm". | |
69 | * | |
8c6cb983 | 70 | * Returns 0. |
0f2a55d5 | 71 | */ |
f7433243 KT |
72 | static int tomoyo_bprm_set_creds(struct linux_binprm *bprm) |
73 | { | |
74 | /* | |
75 | * Do only if this function is called for the first time of an execve | |
76 | * operation. | |
77 | */ | |
ddb4a144 | 78 | if (bprm->called_set_creds) |
f7433243 KT |
79 | return 0; |
80 | /* | |
81 | * Load policy if /sbin/tomoyo-init exists and /sbin/init is requested | |
82 | * for the first time. | |
83 | */ | |
84 | if (!tomoyo_policy_loaded) | |
85 | tomoyo_load_policy(bprm->filename); | |
f7433243 KT |
86 | return 0; |
87 | } | |
8c6cb983 | 88 | #endif |
f7433243 | 89 | |
0f2a55d5 TH |
90 | /** |
91 | * tomoyo_bprm_check_security - Target for security_bprm_check(). | |
92 | * | |
93 | * @bprm: Pointer to "struct linux_binprm". | |
94 | * | |
95 | * Returns 0 on success, negative value otherwise. | |
96 | */ | |
f7433243 KT |
97 | static int tomoyo_bprm_check_security(struct linux_binprm *bprm) |
98 | { | |
8c6cb983 | 99 | struct tomoyo_task *s = tomoyo_task(current); |
f7433243 KT |
100 | |
101 | /* | |
102 | * Execute permission is checked against pathname passed to do_execve() | |
103 | * using current domain. | |
104 | */ | |
8c6cb983 | 105 | if (!s->old_domain_info) { |
fdb8ebb7 TH |
106 | const int idx = tomoyo_read_lock(); |
107 | const int err = tomoyo_find_next_domain(bprm); | |
cdcf6723 | 108 | |
fdb8ebb7 TH |
109 | tomoyo_read_unlock(idx); |
110 | return err; | |
111 | } | |
f7433243 KT |
112 | /* |
113 | * Read permission is checked against interpreters using next domain. | |
f7433243 | 114 | */ |
8c6cb983 TH |
115 | return tomoyo_check_open_permission(s->domain_info, |
116 | &bprm->file->f_path, O_RDONLY); | |
f7433243 KT |
117 | } |
118 | ||
0f2a55d5 TH |
119 | /** |
120 | * tomoyo_inode_getattr - Target for security_inode_getattr(). | |
121 | * | |
122 | * @mnt: Pointer to "struct vfsmount". | |
123 | * @dentry: Pointer to "struct dentry". | |
124 | * | |
125 | * Returns 0 on success, negative value otherwise. | |
126 | */ | |
3f7036a0 | 127 | static int tomoyo_inode_getattr(const struct path *path) |
7c75964f | 128 | { |
3f7036a0 | 129 | return tomoyo_path_perm(TOMOYO_TYPE_GETATTR, path, NULL); |
7c75964f TH |
130 | } |
131 | ||
0f2a55d5 TH |
132 | /** |
133 | * tomoyo_path_truncate - Target for security_path_truncate(). | |
134 | * | |
135 | * @path: Pointer to "struct path". | |
136 | * | |
137 | * Returns 0 on success, negative value otherwise. | |
138 | */ | |
81f4c506 | 139 | static int tomoyo_path_truncate(const struct path *path) |
f7433243 | 140 | { |
97fb35e4 | 141 | return tomoyo_path_perm(TOMOYO_TYPE_TRUNCATE, path, NULL); |
f7433243 KT |
142 | } |
143 | ||
0f2a55d5 TH |
144 | /** |
145 | * tomoyo_path_unlink - Target for security_path_unlink(). | |
146 | * | |
147 | * @parent: Pointer to "struct path". | |
148 | * @dentry: Pointer to "struct dentry". | |
149 | * | |
150 | * Returns 0 on success, negative value otherwise. | |
151 | */ | |
989f74e0 | 152 | static int tomoyo_path_unlink(const struct path *parent, struct dentry *dentry) |
f7433243 | 153 | { |
8291798d | 154 | struct path path = { .mnt = parent->mnt, .dentry = dentry }; |
cdcf6723 | 155 | |
97fb35e4 | 156 | return tomoyo_path_perm(TOMOYO_TYPE_UNLINK, &path, NULL); |
f7433243 KT |
157 | } |
158 | ||
0f2a55d5 TH |
159 | /** |
160 | * tomoyo_path_mkdir - Target for security_path_mkdir(). | |
161 | * | |
162 | * @parent: Pointer to "struct path". | |
163 | * @dentry: Pointer to "struct dentry". | |
164 | * @mode: DAC permission mode. | |
165 | * | |
166 | * Returns 0 on success, negative value otherwise. | |
167 | */ | |
d3607752 | 168 | static int tomoyo_path_mkdir(const struct path *parent, struct dentry *dentry, |
4572befe | 169 | umode_t mode) |
f7433243 | 170 | { |
8291798d | 171 | struct path path = { .mnt = parent->mnt, .dentry = dentry }; |
cdcf6723 | 172 | |
a1f9bb6a TH |
173 | return tomoyo_path_number_perm(TOMOYO_TYPE_MKDIR, &path, |
174 | mode & S_IALLUGO); | |
f7433243 KT |
175 | } |
176 | ||
0f2a55d5 TH |
177 | /** |
178 | * tomoyo_path_rmdir - Target for security_path_rmdir(). | |
179 | * | |
180 | * @parent: Pointer to "struct path". | |
181 | * @dentry: Pointer to "struct dentry". | |
182 | * | |
183 | * Returns 0 on success, negative value otherwise. | |
184 | */ | |
989f74e0 | 185 | static int tomoyo_path_rmdir(const struct path *parent, struct dentry *dentry) |
f7433243 | 186 | { |
8291798d | 187 | struct path path = { .mnt = parent->mnt, .dentry = dentry }; |
cdcf6723 | 188 | |
97fb35e4 | 189 | return tomoyo_path_perm(TOMOYO_TYPE_RMDIR, &path, NULL); |
f7433243 KT |
190 | } |
191 | ||
0f2a55d5 TH |
192 | /** |
193 | * tomoyo_path_symlink - Target for security_path_symlink(). | |
194 | * | |
195 | * @parent: Pointer to "struct path". | |
196 | * @dentry: Pointer to "struct dentry". | |
197 | * @old_name: Symlink's content. | |
198 | * | |
199 | * Returns 0 on success, negative value otherwise. | |
200 | */ | |
d3607752 | 201 | static int tomoyo_path_symlink(const struct path *parent, struct dentry *dentry, |
f7433243 KT |
202 | const char *old_name) |
203 | { | |
8291798d | 204 | struct path path = { .mnt = parent->mnt, .dentry = dentry }; |
cdcf6723 | 205 | |
97fb35e4 | 206 | return tomoyo_path_perm(TOMOYO_TYPE_SYMLINK, &path, old_name); |
f7433243 KT |
207 | } |
208 | ||
0f2a55d5 TH |
209 | /** |
210 | * tomoyo_path_mknod - Target for security_path_mknod(). | |
211 | * | |
212 | * @parent: Pointer to "struct path". | |
213 | * @dentry: Pointer to "struct dentry". | |
214 | * @mode: DAC permission mode. | |
215 | * @dev: Device attributes. | |
216 | * | |
217 | * Returns 0 on success, negative value otherwise. | |
218 | */ | |
d3607752 | 219 | static int tomoyo_path_mknod(const struct path *parent, struct dentry *dentry, |
04fc66e7 | 220 | umode_t mode, unsigned int dev) |
f7433243 | 221 | { |
8291798d | 222 | struct path path = { .mnt = parent->mnt, .dentry = dentry }; |
7ef61233 | 223 | int type = TOMOYO_TYPE_CREATE; |
a1f9bb6a | 224 | const unsigned int perm = mode & S_IALLUGO; |
f7433243 KT |
225 | |
226 | switch (mode & S_IFMT) { | |
227 | case S_IFCHR: | |
7ef61233 | 228 | type = TOMOYO_TYPE_MKCHAR; |
f7433243 KT |
229 | break; |
230 | case S_IFBLK: | |
7ef61233 | 231 | type = TOMOYO_TYPE_MKBLOCK; |
f7433243 | 232 | break; |
a1f9bb6a TH |
233 | default: |
234 | goto no_dev; | |
235 | } | |
75093152 | 236 | return tomoyo_mkdev_perm(type, &path, perm, dev); |
a1f9bb6a TH |
237 | no_dev: |
238 | switch (mode & S_IFMT) { | |
f7433243 | 239 | case S_IFIFO: |
7ef61233 | 240 | type = TOMOYO_TYPE_MKFIFO; |
f7433243 KT |
241 | break; |
242 | case S_IFSOCK: | |
7ef61233 | 243 | type = TOMOYO_TYPE_MKSOCK; |
f7433243 KT |
244 | break; |
245 | } | |
a1f9bb6a | 246 | return tomoyo_path_number_perm(type, &path, perm); |
f7433243 KT |
247 | } |
248 | ||
0f2a55d5 TH |
249 | /** |
250 | * tomoyo_path_link - Target for security_path_link(). | |
251 | * | |
252 | * @old_dentry: Pointer to "struct dentry". | |
253 | * @new_dir: Pointer to "struct path". | |
254 | * @new_dentry: Pointer to "struct dentry". | |
255 | * | |
256 | * Returns 0 on success, negative value otherwise. | |
257 | */ | |
3ccee46a | 258 | static int tomoyo_path_link(struct dentry *old_dentry, const struct path *new_dir, |
f7433243 KT |
259 | struct dentry *new_dentry) |
260 | { | |
8291798d KC |
261 | struct path path1 = { .mnt = new_dir->mnt, .dentry = old_dentry }; |
262 | struct path path2 = { .mnt = new_dir->mnt, .dentry = new_dentry }; | |
cdcf6723 | 263 | |
97d6931e | 264 | return tomoyo_path2_perm(TOMOYO_TYPE_LINK, &path1, &path2); |
f7433243 KT |
265 | } |
266 | ||
0f2a55d5 TH |
267 | /** |
268 | * tomoyo_path_rename - Target for security_path_rename(). | |
269 | * | |
270 | * @old_parent: Pointer to "struct path". | |
271 | * @old_dentry: Pointer to "struct dentry". | |
272 | * @new_parent: Pointer to "struct path". | |
273 | * @new_dentry: Pointer to "struct dentry". | |
274 | * | |
275 | * Returns 0 on success, negative value otherwise. | |
276 | */ | |
3ccee46a | 277 | static int tomoyo_path_rename(const struct path *old_parent, |
f7433243 | 278 | struct dentry *old_dentry, |
3ccee46a | 279 | const struct path *new_parent, |
f7433243 KT |
280 | struct dentry *new_dentry) |
281 | { | |
8291798d KC |
282 | struct path path1 = { .mnt = old_parent->mnt, .dentry = old_dentry }; |
283 | struct path path2 = { .mnt = new_parent->mnt, .dentry = new_dentry }; | |
cdcf6723 | 284 | |
97d6931e | 285 | return tomoyo_path2_perm(TOMOYO_TYPE_RENAME, &path1, &path2); |
f7433243 KT |
286 | } |
287 | ||
0f2a55d5 TH |
288 | /** |
289 | * tomoyo_file_fcntl - Target for security_file_fcntl(). | |
290 | * | |
291 | * @file: Pointer to "struct file". | |
292 | * @cmd: Command for fcntl(). | |
293 | * @arg: Argument for @cmd. | |
294 | * | |
295 | * Returns 0 on success, negative value otherwise. | |
296 | */ | |
f7433243 KT |
297 | static int tomoyo_file_fcntl(struct file *file, unsigned int cmd, |
298 | unsigned long arg) | |
299 | { | |
7c75964f TH |
300 | if (!(cmd == F_SETFL && ((arg ^ file->f_flags) & O_APPEND))) |
301 | return 0; | |
302 | return tomoyo_check_open_permission(tomoyo_domain(), &file->f_path, | |
303 | O_WRONLY | (arg & O_APPEND)); | |
f7433243 KT |
304 | } |
305 | ||
0f2a55d5 | 306 | /** |
83d49856 | 307 | * tomoyo_file_open - Target for security_file_open(). |
0f2a55d5 TH |
308 | * |
309 | * @f: Pointer to "struct file". | |
310 | * @cred: Pointer to "struct cred". | |
311 | * | |
312 | * Returns 0 on success, negative value otherwise. | |
313 | */ | |
94817692 | 314 | static int tomoyo_file_open(struct file *f) |
f7433243 | 315 | { |
f7433243 KT |
316 | /* Don't check read permission here if called from do_execve(). */ |
317 | if (current->in_execve) | |
318 | return 0; | |
cdcf6723 TH |
319 | return tomoyo_check_open_permission(tomoyo_domain(), &f->f_path, |
320 | f->f_flags); | |
f7433243 KT |
321 | } |
322 | ||
0f2a55d5 TH |
323 | /** |
324 | * tomoyo_file_ioctl - Target for security_file_ioctl(). | |
325 | * | |
326 | * @file: Pointer to "struct file". | |
327 | * @cmd: Command for ioctl(). | |
328 | * @arg: Argument for @cmd. | |
329 | * | |
330 | * Returns 0 on success, negative value otherwise. | |
331 | */ | |
937bf613 TH |
332 | static int tomoyo_file_ioctl(struct file *file, unsigned int cmd, |
333 | unsigned long arg) | |
334 | { | |
a1f9bb6a | 335 | return tomoyo_path_number_perm(TOMOYO_TYPE_IOCTL, &file->f_path, cmd); |
937bf613 TH |
336 | } |
337 | ||
0f2a55d5 TH |
338 | /** |
339 | * tomoyo_path_chmod - Target for security_path_chmod(). | |
340 | * | |
cdcf116d AV |
341 | * @path: Pointer to "struct path". |
342 | * @mode: DAC permission mode. | |
0f2a55d5 TH |
343 | * |
344 | * Returns 0 on success, negative value otherwise. | |
345 | */ | |
be01f9f2 | 346 | static int tomoyo_path_chmod(const struct path *path, umode_t mode) |
937bf613 | 347 | { |
cdcf116d | 348 | return tomoyo_path_number_perm(TOMOYO_TYPE_CHMOD, path, |
a1f9bb6a | 349 | mode & S_IALLUGO); |
937bf613 TH |
350 | } |
351 | ||
0f2a55d5 TH |
352 | /** |
353 | * tomoyo_path_chown - Target for security_path_chown(). | |
354 | * | |
355 | * @path: Pointer to "struct path". | |
356 | * @uid: Owner ID. | |
357 | * @gid: Group ID. | |
358 | * | |
359 | * Returns 0 on success, negative value otherwise. | |
360 | */ | |
7fd25dac | 361 | static int tomoyo_path_chown(const struct path *path, kuid_t uid, kgid_t gid) |
937bf613 TH |
362 | { |
363 | int error = 0; | |
cdcf6723 | 364 | |
d2b31ca6 EB |
365 | if (uid_valid(uid)) |
366 | error = tomoyo_path_number_perm(TOMOYO_TYPE_CHOWN, path, | |
367 | from_kuid(&init_user_ns, uid)); | |
368 | if (!error && gid_valid(gid)) | |
369 | error = tomoyo_path_number_perm(TOMOYO_TYPE_CHGRP, path, | |
370 | from_kgid(&init_user_ns, gid)); | |
937bf613 TH |
371 | return error; |
372 | } | |
373 | ||
0f2a55d5 TH |
374 | /** |
375 | * tomoyo_path_chroot - Target for security_path_chroot(). | |
376 | * | |
377 | * @path: Pointer to "struct path". | |
378 | * | |
379 | * Returns 0 on success, negative value otherwise. | |
380 | */ | |
77b286c0 | 381 | static int tomoyo_path_chroot(const struct path *path) |
937bf613 | 382 | { |
97fb35e4 | 383 | return tomoyo_path_perm(TOMOYO_TYPE_CHROOT, path, NULL); |
937bf613 TH |
384 | } |
385 | ||
0f2a55d5 TH |
386 | /** |
387 | * tomoyo_sb_mount - Target for security_sb_mount(). | |
388 | * | |
389 | * @dev_name: Name of device file. Maybe NULL. | |
390 | * @path: Pointer to "struct path". | |
391 | * @type: Name of filesystem type. Maybe NULL. | |
392 | * @flags: Mount options. | |
393 | * @data: Optional data. Maybe NULL. | |
394 | * | |
395 | * Returns 0 on success, negative value otherwise. | |
396 | */ | |
8a04c43b | 397 | static int tomoyo_sb_mount(const char *dev_name, const struct path *path, |
808d4e3c | 398 | const char *type, unsigned long flags, void *data) |
937bf613 | 399 | { |
2106ccd9 | 400 | return tomoyo_mount_permission(dev_name, path, type, flags, data); |
937bf613 TH |
401 | } |
402 | ||
0f2a55d5 TH |
403 | /** |
404 | * tomoyo_sb_umount - Target for security_sb_umount(). | |
405 | * | |
406 | * @mnt: Pointer to "struct vfsmount". | |
407 | * @flags: Unmount options. | |
408 | * | |
409 | * Returns 0 on success, negative value otherwise. | |
410 | */ | |
937bf613 TH |
411 | static int tomoyo_sb_umount(struct vfsmount *mnt, int flags) |
412 | { | |
8291798d | 413 | struct path path = { .mnt = mnt, .dentry = mnt->mnt_root }; |
cdcf6723 | 414 | |
97fb35e4 | 415 | return tomoyo_path_perm(TOMOYO_TYPE_UMOUNT, &path, NULL); |
937bf613 TH |
416 | } |
417 | ||
0f2a55d5 TH |
418 | /** |
419 | * tomoyo_sb_pivotroot - Target for security_sb_pivotroot(). | |
420 | * | |
421 | * @old_path: Pointer to "struct path". | |
422 | * @new_path: Pointer to "struct path". | |
423 | * | |
424 | * Returns 0 on success, negative value otherwise. | |
425 | */ | |
3b73b68c | 426 | static int tomoyo_sb_pivotroot(const struct path *old_path, const struct path *new_path) |
937bf613 | 427 | { |
97d6931e | 428 | return tomoyo_path2_perm(TOMOYO_TYPE_PIVOT_ROOT, new_path, old_path); |
937bf613 TH |
429 | } |
430 | ||
059d84db TH |
431 | /** |
432 | * tomoyo_socket_listen - Check permission for listen(). | |
433 | * | |
434 | * @sock: Pointer to "struct socket". | |
435 | * @backlog: Backlog parameter. | |
436 | * | |
437 | * Returns 0 on success, negative value otherwise. | |
438 | */ | |
439 | static int tomoyo_socket_listen(struct socket *sock, int backlog) | |
440 | { | |
441 | return tomoyo_socket_listen_permission(sock); | |
442 | } | |
443 | ||
444 | /** | |
445 | * tomoyo_socket_connect - Check permission for connect(). | |
446 | * | |
447 | * @sock: Pointer to "struct socket". | |
448 | * @addr: Pointer to "struct sockaddr". | |
449 | * @addr_len: Size of @addr. | |
450 | * | |
451 | * Returns 0 on success, negative value otherwise. | |
452 | */ | |
453 | static int tomoyo_socket_connect(struct socket *sock, struct sockaddr *addr, | |
454 | int addr_len) | |
455 | { | |
456 | return tomoyo_socket_connect_permission(sock, addr, addr_len); | |
457 | } | |
458 | ||
459 | /** | |
460 | * tomoyo_socket_bind - Check permission for bind(). | |
461 | * | |
462 | * @sock: Pointer to "struct socket". | |
463 | * @addr: Pointer to "struct sockaddr". | |
464 | * @addr_len: Size of @addr. | |
465 | * | |
466 | * Returns 0 on success, negative value otherwise. | |
467 | */ | |
468 | static int tomoyo_socket_bind(struct socket *sock, struct sockaddr *addr, | |
469 | int addr_len) | |
470 | { | |
471 | return tomoyo_socket_bind_permission(sock, addr, addr_len); | |
472 | } | |
473 | ||
474 | /** | |
475 | * tomoyo_socket_sendmsg - Check permission for sendmsg(). | |
476 | * | |
477 | * @sock: Pointer to "struct socket". | |
478 | * @msg: Pointer to "struct msghdr". | |
479 | * @size: Size of message. | |
480 | * | |
481 | * Returns 0 on success, negative value otherwise. | |
482 | */ | |
483 | static int tomoyo_socket_sendmsg(struct socket *sock, struct msghdr *msg, | |
484 | int size) | |
485 | { | |
486 | return tomoyo_socket_sendmsg_permission(sock, msg, size); | |
487 | } | |
488 | ||
bbd3662a | 489 | struct lsm_blob_sizes tomoyo_blob_sizes __lsm_ro_after_init = { |
8c6cb983 | 490 | .lbs_task = sizeof(struct tomoyo_task), |
bbd3662a CS |
491 | }; |
492 | ||
8c6cb983 TH |
493 | /** |
494 | * tomoyo_task_alloc - Target for security_task_alloc(). | |
495 | * | |
496 | * @task: Pointer to "struct task_struct". | |
497 | * @flags: clone() flags. | |
498 | * | |
499 | * Returns 0. | |
500 | */ | |
501 | static int tomoyo_task_alloc(struct task_struct *task, | |
502 | unsigned long clone_flags) | |
503 | { | |
504 | struct tomoyo_task *old = tomoyo_task(current); | |
505 | struct tomoyo_task *new = tomoyo_task(task); | |
506 | ||
507 | new->domain_info = old->domain_info; | |
508 | atomic_inc(&new->domain_info->users); | |
509 | new->old_domain_info = NULL; | |
510 | return 0; | |
511 | } | |
512 | ||
513 | /** | |
514 | * tomoyo_task_free - Target for security_task_free(). | |
515 | * | |
516 | * @task: Pointer to "struct task_struct". | |
517 | */ | |
518 | static void tomoyo_task_free(struct task_struct *task) | |
519 | { | |
520 | struct tomoyo_task *s = tomoyo_task(task); | |
521 | ||
522 | if (s->domain_info) { | |
523 | atomic_dec(&s->domain_info->users); | |
524 | s->domain_info = NULL; | |
525 | } | |
526 | if (s->old_domain_info) { | |
527 | atomic_dec(&s->old_domain_info->users); | |
528 | s->old_domain_info = NULL; | |
529 | } | |
530 | } | |
531 | ||
c3fa109a TH |
532 | /* |
533 | * tomoyo_security_ops is a "struct security_operations" which is used for | |
534 | * registering TOMOYO. | |
535 | */ | |
ca97d939 | 536 | static struct security_hook_list tomoyo_hooks[] __lsm_ro_after_init = { |
e20b043a | 537 | LSM_HOOK_INIT(cred_prepare, tomoyo_cred_prepare), |
8c6cb983 TH |
538 | LSM_HOOK_INIT(bprm_committed_creds, tomoyo_bprm_committed_creds), |
539 | LSM_HOOK_INIT(task_alloc, tomoyo_task_alloc), | |
540 | LSM_HOOK_INIT(task_free, tomoyo_task_free), | |
541 | #ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER | |
e20b043a | 542 | LSM_HOOK_INIT(bprm_set_creds, tomoyo_bprm_set_creds), |
8c6cb983 | 543 | #endif |
e20b043a CS |
544 | LSM_HOOK_INIT(bprm_check_security, tomoyo_bprm_check_security), |
545 | LSM_HOOK_INIT(file_fcntl, tomoyo_file_fcntl), | |
546 | LSM_HOOK_INIT(file_open, tomoyo_file_open), | |
547 | LSM_HOOK_INIT(path_truncate, tomoyo_path_truncate), | |
548 | LSM_HOOK_INIT(path_unlink, tomoyo_path_unlink), | |
549 | LSM_HOOK_INIT(path_mkdir, tomoyo_path_mkdir), | |
550 | LSM_HOOK_INIT(path_rmdir, tomoyo_path_rmdir), | |
551 | LSM_HOOK_INIT(path_symlink, tomoyo_path_symlink), | |
552 | LSM_HOOK_INIT(path_mknod, tomoyo_path_mknod), | |
553 | LSM_HOOK_INIT(path_link, tomoyo_path_link), | |
554 | LSM_HOOK_INIT(path_rename, tomoyo_path_rename), | |
555 | LSM_HOOK_INIT(inode_getattr, tomoyo_inode_getattr), | |
556 | LSM_HOOK_INIT(file_ioctl, tomoyo_file_ioctl), | |
557 | LSM_HOOK_INIT(path_chmod, tomoyo_path_chmod), | |
558 | LSM_HOOK_INIT(path_chown, tomoyo_path_chown), | |
559 | LSM_HOOK_INIT(path_chroot, tomoyo_path_chroot), | |
560 | LSM_HOOK_INIT(sb_mount, tomoyo_sb_mount), | |
561 | LSM_HOOK_INIT(sb_umount, tomoyo_sb_umount), | |
562 | LSM_HOOK_INIT(sb_pivotroot, tomoyo_sb_pivotroot), | |
563 | LSM_HOOK_INIT(socket_bind, tomoyo_socket_bind), | |
564 | LSM_HOOK_INIT(socket_connect, tomoyo_socket_connect), | |
565 | LSM_HOOK_INIT(socket_listen, tomoyo_socket_listen), | |
566 | LSM_HOOK_INIT(socket_sendmsg, tomoyo_socket_sendmsg), | |
f7433243 KT |
567 | }; |
568 | ||
fdb8ebb7 | 569 | /* Lock for GC. */ |
505f14f7 | 570 | DEFINE_SRCU(tomoyo_ss); |
fdb8ebb7 | 571 | |
43fc4609 CS |
572 | int tomoyo_enabled __lsm_ro_after_init = 1; |
573 | ||
0f2a55d5 TH |
574 | /** |
575 | * tomoyo_init - Register TOMOYO Linux as a LSM module. | |
576 | * | |
577 | * Returns 0. | |
578 | */ | |
f7433243 KT |
579 | static int __init tomoyo_init(void) |
580 | { | |
8c6cb983 | 581 | struct tomoyo_task *s = tomoyo_task(current); |
f7433243 | 582 | |
f7433243 | 583 | /* register ourselves with the security framework */ |
d69dece5 | 584 | security_add_hooks(tomoyo_hooks, ARRAY_SIZE(tomoyo_hooks), "tomoyo"); |
cdcf6723 | 585 | pr_info("TOMOYO Linux initialized\n"); |
8c6cb983 TH |
586 | s->domain_info = &tomoyo_kernel_domain; |
587 | atomic_inc(&tomoyo_kernel_domain.users); | |
588 | s->old_domain_info = NULL; | |
c3ef1500 | 589 | tomoyo_mm_init(); |
43fc4609 | 590 | |
f7433243 KT |
591 | return 0; |
592 | } | |
593 | ||
3d6e5f6d | 594 | DEFINE_LSM(tomoyo) = { |
07aed2f2 | 595 | .name = "tomoyo", |
43fc4609 | 596 | .enabled = &tomoyo_enabled, |
a5e2fe7e | 597 | .flags = LSM_FLAG_LEGACY_MAJOR, |
bbd3662a | 598 | .blobs = &tomoyo_blob_sizes, |
3d6e5f6d KC |
599 | .init = tomoyo_init, |
600 | }; |