Commit | Line | Data |
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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 | 65 | /** |
98eaa63e | 66 | * tomoyo_bprm_creds_for_exec - Target for security_bprm_creds_for_exec(). |
0f2a55d5 TH |
67 | * |
68 | * @bprm: Pointer to "struct linux_binprm". | |
69 | * | |
8c6cb983 | 70 | * Returns 0. |
0f2a55d5 | 71 | */ |
b8bff599 | 72 | static int tomoyo_bprm_creds_for_exec(struct linux_binprm *bprm) |
f7433243 | 73 | { |
f7433243 KT |
74 | /* |
75 | * Load policy if /sbin/tomoyo-init exists and /sbin/init is requested | |
76 | * for the first time. | |
77 | */ | |
78 | if (!tomoyo_policy_loaded) | |
79 | tomoyo_load_policy(bprm->filename); | |
f7433243 KT |
80 | return 0; |
81 | } | |
8c6cb983 | 82 | #endif |
f7433243 | 83 | |
0f2a55d5 TH |
84 | /** |
85 | * tomoyo_bprm_check_security - Target for security_bprm_check(). | |
86 | * | |
87 | * @bprm: Pointer to "struct linux_binprm". | |
88 | * | |
89 | * Returns 0 on success, negative value otherwise. | |
90 | */ | |
f7433243 KT |
91 | static int tomoyo_bprm_check_security(struct linux_binprm *bprm) |
92 | { | |
8c6cb983 | 93 | struct tomoyo_task *s = tomoyo_task(current); |
f7433243 KT |
94 | |
95 | /* | |
be619f7f | 96 | * Execute permission is checked against pathname passed to execve() |
f7433243 KT |
97 | * using current domain. |
98 | */ | |
8c6cb983 | 99 | if (!s->old_domain_info) { |
fdb8ebb7 TH |
100 | const int idx = tomoyo_read_lock(); |
101 | const int err = tomoyo_find_next_domain(bprm); | |
cdcf6723 | 102 | |
fdb8ebb7 TH |
103 | tomoyo_read_unlock(idx); |
104 | return err; | |
105 | } | |
f7433243 KT |
106 | /* |
107 | * Read permission is checked against interpreters using next domain. | |
f7433243 | 108 | */ |
8c6cb983 TH |
109 | return tomoyo_check_open_permission(s->domain_info, |
110 | &bprm->file->f_path, O_RDONLY); | |
f7433243 KT |
111 | } |
112 | ||
0f2a55d5 TH |
113 | /** |
114 | * tomoyo_inode_getattr - Target for security_inode_getattr(). | |
115 | * | |
98eaa63e | 116 | * @path: Pointer to "struct path". |
0f2a55d5 TH |
117 | * |
118 | * Returns 0 on success, negative value otherwise. | |
119 | */ | |
3f7036a0 | 120 | static int tomoyo_inode_getattr(const struct path *path) |
7c75964f | 121 | { |
3f7036a0 | 122 | return tomoyo_path_perm(TOMOYO_TYPE_GETATTR, path, NULL); |
7c75964f TH |
123 | } |
124 | ||
0f2a55d5 TH |
125 | /** |
126 | * tomoyo_path_truncate - Target for security_path_truncate(). | |
127 | * | |
128 | * @path: Pointer to "struct path". | |
129 | * | |
130 | * Returns 0 on success, negative value otherwise. | |
131 | */ | |
81f4c506 | 132 | static int tomoyo_path_truncate(const struct path *path) |
f7433243 | 133 | { |
97fb35e4 | 134 | return tomoyo_path_perm(TOMOYO_TYPE_TRUNCATE, path, NULL); |
f7433243 KT |
135 | } |
136 | ||
3350607d GN |
137 | /** |
138 | * tomoyo_file_truncate - Target for security_file_truncate(). | |
139 | * | |
140 | * @file: Pointer to "struct file". | |
141 | * | |
142 | * Returns 0 on success, negative value otherwise. | |
143 | */ | |
144 | static int tomoyo_file_truncate(struct file *file) | |
145 | { | |
146 | return tomoyo_path_truncate(&file->f_path); | |
147 | } | |
148 | ||
0f2a55d5 TH |
149 | /** |
150 | * tomoyo_path_unlink - Target for security_path_unlink(). | |
151 | * | |
152 | * @parent: Pointer to "struct path". | |
153 | * @dentry: Pointer to "struct dentry". | |
154 | * | |
155 | * Returns 0 on success, negative value otherwise. | |
156 | */ | |
989f74e0 | 157 | static int tomoyo_path_unlink(const struct path *parent, struct dentry *dentry) |
f7433243 | 158 | { |
8291798d | 159 | struct path path = { .mnt = parent->mnt, .dentry = dentry }; |
cdcf6723 | 160 | |
97fb35e4 | 161 | return tomoyo_path_perm(TOMOYO_TYPE_UNLINK, &path, NULL); |
f7433243 KT |
162 | } |
163 | ||
0f2a55d5 TH |
164 | /** |
165 | * tomoyo_path_mkdir - Target for security_path_mkdir(). | |
166 | * | |
167 | * @parent: Pointer to "struct path". | |
168 | * @dentry: Pointer to "struct dentry". | |
169 | * @mode: DAC permission mode. | |
170 | * | |
171 | * Returns 0 on success, negative value otherwise. | |
172 | */ | |
d3607752 | 173 | static int tomoyo_path_mkdir(const struct path *parent, struct dentry *dentry, |
4572befe | 174 | umode_t mode) |
f7433243 | 175 | { |
8291798d | 176 | struct path path = { .mnt = parent->mnt, .dentry = dentry }; |
cdcf6723 | 177 | |
a1f9bb6a TH |
178 | return tomoyo_path_number_perm(TOMOYO_TYPE_MKDIR, &path, |
179 | mode & S_IALLUGO); | |
f7433243 KT |
180 | } |
181 | ||
0f2a55d5 TH |
182 | /** |
183 | * tomoyo_path_rmdir - Target for security_path_rmdir(). | |
184 | * | |
185 | * @parent: Pointer to "struct path". | |
186 | * @dentry: Pointer to "struct dentry". | |
187 | * | |
188 | * Returns 0 on success, negative value otherwise. | |
189 | */ | |
989f74e0 | 190 | static int tomoyo_path_rmdir(const struct path *parent, struct dentry *dentry) |
f7433243 | 191 | { |
8291798d | 192 | struct path path = { .mnt = parent->mnt, .dentry = dentry }; |
cdcf6723 | 193 | |
97fb35e4 | 194 | return tomoyo_path_perm(TOMOYO_TYPE_RMDIR, &path, NULL); |
f7433243 KT |
195 | } |
196 | ||
0f2a55d5 TH |
197 | /** |
198 | * tomoyo_path_symlink - Target for security_path_symlink(). | |
199 | * | |
200 | * @parent: Pointer to "struct path". | |
201 | * @dentry: Pointer to "struct dentry". | |
202 | * @old_name: Symlink's content. | |
203 | * | |
204 | * Returns 0 on success, negative value otherwise. | |
205 | */ | |
d3607752 | 206 | static int tomoyo_path_symlink(const struct path *parent, struct dentry *dentry, |
f7433243 KT |
207 | const char *old_name) |
208 | { | |
8291798d | 209 | struct path path = { .mnt = parent->mnt, .dentry = dentry }; |
cdcf6723 | 210 | |
97fb35e4 | 211 | return tomoyo_path_perm(TOMOYO_TYPE_SYMLINK, &path, old_name); |
f7433243 KT |
212 | } |
213 | ||
0f2a55d5 TH |
214 | /** |
215 | * tomoyo_path_mknod - Target for security_path_mknod(). | |
216 | * | |
217 | * @parent: Pointer to "struct path". | |
218 | * @dentry: Pointer to "struct dentry". | |
219 | * @mode: DAC permission mode. | |
220 | * @dev: Device attributes. | |
221 | * | |
222 | * Returns 0 on success, negative value otherwise. | |
223 | */ | |
d3607752 | 224 | static int tomoyo_path_mknod(const struct path *parent, struct dentry *dentry, |
04fc66e7 | 225 | umode_t mode, unsigned int dev) |
f7433243 | 226 | { |
8291798d | 227 | struct path path = { .mnt = parent->mnt, .dentry = dentry }; |
7ef61233 | 228 | int type = TOMOYO_TYPE_CREATE; |
a1f9bb6a | 229 | const unsigned int perm = mode & S_IALLUGO; |
f7433243 KT |
230 | |
231 | switch (mode & S_IFMT) { | |
232 | case S_IFCHR: | |
7ef61233 | 233 | type = TOMOYO_TYPE_MKCHAR; |
f7433243 KT |
234 | break; |
235 | case S_IFBLK: | |
7ef61233 | 236 | type = TOMOYO_TYPE_MKBLOCK; |
f7433243 | 237 | break; |
a1f9bb6a TH |
238 | default: |
239 | goto no_dev; | |
240 | } | |
75093152 | 241 | return tomoyo_mkdev_perm(type, &path, perm, dev); |
a1f9bb6a TH |
242 | no_dev: |
243 | switch (mode & S_IFMT) { | |
f7433243 | 244 | case S_IFIFO: |
7ef61233 | 245 | type = TOMOYO_TYPE_MKFIFO; |
f7433243 KT |
246 | break; |
247 | case S_IFSOCK: | |
7ef61233 | 248 | type = TOMOYO_TYPE_MKSOCK; |
f7433243 KT |
249 | break; |
250 | } | |
a1f9bb6a | 251 | return tomoyo_path_number_perm(type, &path, perm); |
f7433243 KT |
252 | } |
253 | ||
0f2a55d5 TH |
254 | /** |
255 | * tomoyo_path_link - Target for security_path_link(). | |
256 | * | |
257 | * @old_dentry: Pointer to "struct dentry". | |
258 | * @new_dir: Pointer to "struct path". | |
259 | * @new_dentry: Pointer to "struct dentry". | |
260 | * | |
261 | * Returns 0 on success, negative value otherwise. | |
262 | */ | |
3ccee46a | 263 | static int tomoyo_path_link(struct dentry *old_dentry, const struct path *new_dir, |
f7433243 KT |
264 | struct dentry *new_dentry) |
265 | { | |
8291798d KC |
266 | struct path path1 = { .mnt = new_dir->mnt, .dentry = old_dentry }; |
267 | struct path path2 = { .mnt = new_dir->mnt, .dentry = new_dentry }; | |
cdcf6723 | 268 | |
97d6931e | 269 | return tomoyo_path2_perm(TOMOYO_TYPE_LINK, &path1, &path2); |
f7433243 KT |
270 | } |
271 | ||
0f2a55d5 TH |
272 | /** |
273 | * tomoyo_path_rename - Target for security_path_rename(). | |
274 | * | |
275 | * @old_parent: Pointer to "struct path". | |
276 | * @old_dentry: Pointer to "struct dentry". | |
277 | * @new_parent: Pointer to "struct path". | |
278 | * @new_dentry: Pointer to "struct dentry". | |
100f59d9 | 279 | * @flags: Rename options. |
0f2a55d5 TH |
280 | * |
281 | * Returns 0 on success, negative value otherwise. | |
282 | */ | |
3ccee46a | 283 | static int tomoyo_path_rename(const struct path *old_parent, |
f7433243 | 284 | struct dentry *old_dentry, |
3ccee46a | 285 | const struct path *new_parent, |
100f59d9 MS |
286 | struct dentry *new_dentry, |
287 | const unsigned int flags) | |
f7433243 | 288 | { |
8291798d KC |
289 | struct path path1 = { .mnt = old_parent->mnt, .dentry = old_dentry }; |
290 | struct path path2 = { .mnt = new_parent->mnt, .dentry = new_dentry }; | |
cdcf6723 | 291 | |
100f59d9 MS |
292 | if (flags & RENAME_EXCHANGE) { |
293 | const int err = tomoyo_path2_perm(TOMOYO_TYPE_RENAME, &path2, | |
294 | &path1); | |
295 | ||
296 | if (err) | |
297 | return err; | |
298 | } | |
97d6931e | 299 | return tomoyo_path2_perm(TOMOYO_TYPE_RENAME, &path1, &path2); |
f7433243 KT |
300 | } |
301 | ||
0f2a55d5 TH |
302 | /** |
303 | * tomoyo_file_fcntl - Target for security_file_fcntl(). | |
304 | * | |
305 | * @file: Pointer to "struct file". | |
306 | * @cmd: Command for fcntl(). | |
307 | * @arg: Argument for @cmd. | |
308 | * | |
309 | * Returns 0 on success, negative value otherwise. | |
310 | */ | |
f7433243 KT |
311 | static int tomoyo_file_fcntl(struct file *file, unsigned int cmd, |
312 | unsigned long arg) | |
313 | { | |
7c75964f TH |
314 | if (!(cmd == F_SETFL && ((arg ^ file->f_flags) & O_APPEND))) |
315 | return 0; | |
316 | return tomoyo_check_open_permission(tomoyo_domain(), &file->f_path, | |
317 | O_WRONLY | (arg & O_APPEND)); | |
f7433243 KT |
318 | } |
319 | ||
0f2a55d5 | 320 | /** |
83d49856 | 321 | * tomoyo_file_open - Target for security_file_open(). |
0f2a55d5 | 322 | * |
98eaa63e | 323 | * @f: Pointer to "struct file". |
0f2a55d5 TH |
324 | * |
325 | * Returns 0 on success, negative value otherwise. | |
326 | */ | |
94817692 | 327 | static int tomoyo_file_open(struct file *f) |
f7433243 | 328 | { |
be619f7f | 329 | /* Don't check read permission here if called from execve(). */ |
f7433243 KT |
330 | if (current->in_execve) |
331 | return 0; | |
cdcf6723 TH |
332 | return tomoyo_check_open_permission(tomoyo_domain(), &f->f_path, |
333 | f->f_flags); | |
f7433243 KT |
334 | } |
335 | ||
0f2a55d5 TH |
336 | /** |
337 | * tomoyo_file_ioctl - Target for security_file_ioctl(). | |
338 | * | |
339 | * @file: Pointer to "struct file". | |
340 | * @cmd: Command for ioctl(). | |
341 | * @arg: Argument for @cmd. | |
342 | * | |
343 | * Returns 0 on success, negative value otherwise. | |
344 | */ | |
937bf613 TH |
345 | static int tomoyo_file_ioctl(struct file *file, unsigned int cmd, |
346 | unsigned long arg) | |
347 | { | |
a1f9bb6a | 348 | return tomoyo_path_number_perm(TOMOYO_TYPE_IOCTL, &file->f_path, cmd); |
937bf613 TH |
349 | } |
350 | ||
0f2a55d5 TH |
351 | /** |
352 | * tomoyo_path_chmod - Target for security_path_chmod(). | |
353 | * | |
cdcf116d AV |
354 | * @path: Pointer to "struct path". |
355 | * @mode: DAC permission mode. | |
0f2a55d5 TH |
356 | * |
357 | * Returns 0 on success, negative value otherwise. | |
358 | */ | |
be01f9f2 | 359 | static int tomoyo_path_chmod(const struct path *path, umode_t mode) |
937bf613 | 360 | { |
cdcf116d | 361 | return tomoyo_path_number_perm(TOMOYO_TYPE_CHMOD, path, |
a1f9bb6a | 362 | mode & S_IALLUGO); |
937bf613 TH |
363 | } |
364 | ||
0f2a55d5 TH |
365 | /** |
366 | * tomoyo_path_chown - Target for security_path_chown(). | |
367 | * | |
368 | * @path: Pointer to "struct path". | |
369 | * @uid: Owner ID. | |
370 | * @gid: Group ID. | |
371 | * | |
372 | * Returns 0 on success, negative value otherwise. | |
373 | */ | |
7fd25dac | 374 | static int tomoyo_path_chown(const struct path *path, kuid_t uid, kgid_t gid) |
937bf613 TH |
375 | { |
376 | int error = 0; | |
cdcf6723 | 377 | |
d2b31ca6 EB |
378 | if (uid_valid(uid)) |
379 | error = tomoyo_path_number_perm(TOMOYO_TYPE_CHOWN, path, | |
380 | from_kuid(&init_user_ns, uid)); | |
381 | if (!error && gid_valid(gid)) | |
382 | error = tomoyo_path_number_perm(TOMOYO_TYPE_CHGRP, path, | |
383 | from_kgid(&init_user_ns, gid)); | |
937bf613 TH |
384 | return error; |
385 | } | |
386 | ||
0f2a55d5 TH |
387 | /** |
388 | * tomoyo_path_chroot - Target for security_path_chroot(). | |
389 | * | |
390 | * @path: Pointer to "struct path". | |
391 | * | |
392 | * Returns 0 on success, negative value otherwise. | |
393 | */ | |
77b286c0 | 394 | static int tomoyo_path_chroot(const struct path *path) |
937bf613 | 395 | { |
97fb35e4 | 396 | return tomoyo_path_perm(TOMOYO_TYPE_CHROOT, path, NULL); |
937bf613 TH |
397 | } |
398 | ||
0f2a55d5 TH |
399 | /** |
400 | * tomoyo_sb_mount - Target for security_sb_mount(). | |
401 | * | |
402 | * @dev_name: Name of device file. Maybe NULL. | |
403 | * @path: Pointer to "struct path". | |
404 | * @type: Name of filesystem type. Maybe NULL. | |
405 | * @flags: Mount options. | |
406 | * @data: Optional data. Maybe NULL. | |
407 | * | |
408 | * Returns 0 on success, negative value otherwise. | |
409 | */ | |
8a04c43b | 410 | static int tomoyo_sb_mount(const char *dev_name, const struct path *path, |
808d4e3c | 411 | const char *type, unsigned long flags, void *data) |
937bf613 | 412 | { |
2106ccd9 | 413 | return tomoyo_mount_permission(dev_name, path, type, flags, data); |
937bf613 TH |
414 | } |
415 | ||
0f2a55d5 TH |
416 | /** |
417 | * tomoyo_sb_umount - Target for security_sb_umount(). | |
418 | * | |
419 | * @mnt: Pointer to "struct vfsmount". | |
420 | * @flags: Unmount options. | |
421 | * | |
422 | * Returns 0 on success, negative value otherwise. | |
423 | */ | |
937bf613 TH |
424 | static int tomoyo_sb_umount(struct vfsmount *mnt, int flags) |
425 | { | |
8291798d | 426 | struct path path = { .mnt = mnt, .dentry = mnt->mnt_root }; |
cdcf6723 | 427 | |
97fb35e4 | 428 | return tomoyo_path_perm(TOMOYO_TYPE_UMOUNT, &path, NULL); |
937bf613 TH |
429 | } |
430 | ||
0f2a55d5 TH |
431 | /** |
432 | * tomoyo_sb_pivotroot - Target for security_sb_pivotroot(). | |
433 | * | |
434 | * @old_path: Pointer to "struct path". | |
435 | * @new_path: Pointer to "struct path". | |
436 | * | |
437 | * Returns 0 on success, negative value otherwise. | |
438 | */ | |
3b73b68c | 439 | static int tomoyo_sb_pivotroot(const struct path *old_path, const struct path *new_path) |
937bf613 | 440 | { |
97d6931e | 441 | return tomoyo_path2_perm(TOMOYO_TYPE_PIVOT_ROOT, new_path, old_path); |
937bf613 TH |
442 | } |
443 | ||
059d84db TH |
444 | /** |
445 | * tomoyo_socket_listen - Check permission for listen(). | |
446 | * | |
447 | * @sock: Pointer to "struct socket". | |
448 | * @backlog: Backlog parameter. | |
449 | * | |
450 | * Returns 0 on success, negative value otherwise. | |
451 | */ | |
452 | static int tomoyo_socket_listen(struct socket *sock, int backlog) | |
453 | { | |
454 | return tomoyo_socket_listen_permission(sock); | |
455 | } | |
456 | ||
457 | /** | |
458 | * tomoyo_socket_connect - Check permission for connect(). | |
459 | * | |
460 | * @sock: Pointer to "struct socket". | |
461 | * @addr: Pointer to "struct sockaddr". | |
462 | * @addr_len: Size of @addr. | |
463 | * | |
464 | * Returns 0 on success, negative value otherwise. | |
465 | */ | |
466 | static int tomoyo_socket_connect(struct socket *sock, struct sockaddr *addr, | |
467 | int addr_len) | |
468 | { | |
469 | return tomoyo_socket_connect_permission(sock, addr, addr_len); | |
470 | } | |
471 | ||
472 | /** | |
473 | * tomoyo_socket_bind - Check permission for bind(). | |
474 | * | |
475 | * @sock: Pointer to "struct socket". | |
476 | * @addr: Pointer to "struct sockaddr". | |
477 | * @addr_len: Size of @addr. | |
478 | * | |
479 | * Returns 0 on success, negative value otherwise. | |
480 | */ | |
481 | static int tomoyo_socket_bind(struct socket *sock, struct sockaddr *addr, | |
482 | int addr_len) | |
483 | { | |
484 | return tomoyo_socket_bind_permission(sock, addr, addr_len); | |
485 | } | |
486 | ||
487 | /** | |
488 | * tomoyo_socket_sendmsg - Check permission for sendmsg(). | |
489 | * | |
490 | * @sock: Pointer to "struct socket". | |
491 | * @msg: Pointer to "struct msghdr". | |
492 | * @size: Size of message. | |
493 | * | |
494 | * Returns 0 on success, negative value otherwise. | |
495 | */ | |
496 | static int tomoyo_socket_sendmsg(struct socket *sock, struct msghdr *msg, | |
497 | int size) | |
498 | { | |
499 | return tomoyo_socket_sendmsg_permission(sock, msg, size); | |
500 | } | |
501 | ||
f22f9aaf | 502 | struct lsm_blob_sizes tomoyo_blob_sizes __ro_after_init = { |
8c6cb983 | 503 | .lbs_task = sizeof(struct tomoyo_task), |
bbd3662a CS |
504 | }; |
505 | ||
8c6cb983 TH |
506 | /** |
507 | * tomoyo_task_alloc - Target for security_task_alloc(). | |
508 | * | |
98eaa63e C |
509 | * @task: Pointer to "struct task_struct". |
510 | * @clone_flags: clone() flags. | |
8c6cb983 TH |
511 | * |
512 | * Returns 0. | |
513 | */ | |
514 | static int tomoyo_task_alloc(struct task_struct *task, | |
515 | unsigned long clone_flags) | |
516 | { | |
517 | struct tomoyo_task *old = tomoyo_task(current); | |
518 | struct tomoyo_task *new = tomoyo_task(task); | |
519 | ||
520 | new->domain_info = old->domain_info; | |
521 | atomic_inc(&new->domain_info->users); | |
522 | new->old_domain_info = NULL; | |
523 | return 0; | |
524 | } | |
525 | ||
526 | /** | |
527 | * tomoyo_task_free - Target for security_task_free(). | |
528 | * | |
529 | * @task: Pointer to "struct task_struct". | |
530 | */ | |
531 | static void tomoyo_task_free(struct task_struct *task) | |
532 | { | |
533 | struct tomoyo_task *s = tomoyo_task(task); | |
534 | ||
535 | if (s->domain_info) { | |
536 | atomic_dec(&s->domain_info->users); | |
537 | s->domain_info = NULL; | |
538 | } | |
539 | if (s->old_domain_info) { | |
540 | atomic_dec(&s->old_domain_info->users); | |
541 | s->old_domain_info = NULL; | |
542 | } | |
543 | } | |
544 | ||
c3fa109a TH |
545 | /* |
546 | * tomoyo_security_ops is a "struct security_operations" which is used for | |
547 | * registering TOMOYO. | |
548 | */ | |
f22f9aaf | 549 | static struct security_hook_list tomoyo_hooks[] __ro_after_init = { |
e20b043a | 550 | LSM_HOOK_INIT(cred_prepare, tomoyo_cred_prepare), |
8c6cb983 TH |
551 | LSM_HOOK_INIT(bprm_committed_creds, tomoyo_bprm_committed_creds), |
552 | LSM_HOOK_INIT(task_alloc, tomoyo_task_alloc), | |
553 | LSM_HOOK_INIT(task_free, tomoyo_task_free), | |
554 | #ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER | |
b8bff599 | 555 | LSM_HOOK_INIT(bprm_creds_for_exec, tomoyo_bprm_creds_for_exec), |
8c6cb983 | 556 | #endif |
e20b043a CS |
557 | LSM_HOOK_INIT(bprm_check_security, tomoyo_bprm_check_security), |
558 | LSM_HOOK_INIT(file_fcntl, tomoyo_file_fcntl), | |
559 | LSM_HOOK_INIT(file_open, tomoyo_file_open), | |
3350607d | 560 | LSM_HOOK_INIT(file_truncate, tomoyo_file_truncate), |
e20b043a CS |
561 | LSM_HOOK_INIT(path_truncate, tomoyo_path_truncate), |
562 | LSM_HOOK_INIT(path_unlink, tomoyo_path_unlink), | |
563 | LSM_HOOK_INIT(path_mkdir, tomoyo_path_mkdir), | |
564 | LSM_HOOK_INIT(path_rmdir, tomoyo_path_rmdir), | |
565 | LSM_HOOK_INIT(path_symlink, tomoyo_path_symlink), | |
566 | LSM_HOOK_INIT(path_mknod, tomoyo_path_mknod), | |
567 | LSM_HOOK_INIT(path_link, tomoyo_path_link), | |
568 | LSM_HOOK_INIT(path_rename, tomoyo_path_rename), | |
569 | LSM_HOOK_INIT(inode_getattr, tomoyo_inode_getattr), | |
570 | LSM_HOOK_INIT(file_ioctl, tomoyo_file_ioctl), | |
571 | LSM_HOOK_INIT(path_chmod, tomoyo_path_chmod), | |
572 | LSM_HOOK_INIT(path_chown, tomoyo_path_chown), | |
573 | LSM_HOOK_INIT(path_chroot, tomoyo_path_chroot), | |
574 | LSM_HOOK_INIT(sb_mount, tomoyo_sb_mount), | |
575 | LSM_HOOK_INIT(sb_umount, tomoyo_sb_umount), | |
576 | LSM_HOOK_INIT(sb_pivotroot, tomoyo_sb_pivotroot), | |
577 | LSM_HOOK_INIT(socket_bind, tomoyo_socket_bind), | |
578 | LSM_HOOK_INIT(socket_connect, tomoyo_socket_connect), | |
579 | LSM_HOOK_INIT(socket_listen, tomoyo_socket_listen), | |
580 | LSM_HOOK_INIT(socket_sendmsg, tomoyo_socket_sendmsg), | |
f7433243 KT |
581 | }; |
582 | ||
fdb8ebb7 | 583 | /* Lock for GC. */ |
505f14f7 | 584 | DEFINE_SRCU(tomoyo_ss); |
fdb8ebb7 | 585 | |
f22f9aaf | 586 | int tomoyo_enabled __ro_after_init = 1; |
43fc4609 | 587 | |
0f2a55d5 TH |
588 | /** |
589 | * tomoyo_init - Register TOMOYO Linux as a LSM module. | |
590 | * | |
591 | * Returns 0. | |
592 | */ | |
f7433243 KT |
593 | static int __init tomoyo_init(void) |
594 | { | |
8c6cb983 | 595 | struct tomoyo_task *s = tomoyo_task(current); |
f7433243 | 596 | |
f7433243 | 597 | /* register ourselves with the security framework */ |
d69dece5 | 598 | security_add_hooks(tomoyo_hooks, ARRAY_SIZE(tomoyo_hooks), "tomoyo"); |
cdcf6723 | 599 | pr_info("TOMOYO Linux initialized\n"); |
8c6cb983 TH |
600 | s->domain_info = &tomoyo_kernel_domain; |
601 | atomic_inc(&tomoyo_kernel_domain.users); | |
602 | s->old_domain_info = NULL; | |
c3ef1500 | 603 | tomoyo_mm_init(); |
43fc4609 | 604 | |
f7433243 KT |
605 | return 0; |
606 | } | |
607 | ||
3d6e5f6d | 608 | DEFINE_LSM(tomoyo) = { |
07aed2f2 | 609 | .name = "tomoyo", |
43fc4609 | 610 | .enabled = &tomoyo_enabled, |
a5e2fe7e | 611 | .flags = LSM_FLAG_LEGACY_MAJOR, |
bbd3662a | 612 | .blobs = &tomoyo_blob_sizes, |
3d6e5f6d KC |
613 | .init = tomoyo_init, |
614 | }; |