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Commit | Line | Data |
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b5e95b48 JJ |
1 | /* |
2 | * AppArmor security module | |
3 | * | |
4 | * This file contains AppArmor LSM hooks. | |
5 | * | |
6 | * Copyright (C) 1998-2008 Novell/SUSE | |
7 | * Copyright 2009-2010 Canonical Ltd. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation, version 2 of the | |
12 | * License. | |
13 | */ | |
14 | ||
3c4ed7bd | 15 | #include <linux/lsm_hooks.h> |
b5e95b48 JJ |
16 | #include <linux/moduleparam.h> |
17 | #include <linux/mm.h> | |
18 | #include <linux/mman.h> | |
19 | #include <linux/mount.h> | |
20 | #include <linux/namei.h> | |
21 | #include <linux/ptrace.h> | |
22 | #include <linux/ctype.h> | |
23 | #include <linux/sysctl.h> | |
24 | #include <linux/audit.h> | |
3486740a | 25 | #include <linux/user_namespace.h> |
e025be0f | 26 | #include <linux/kmemleak.h> |
b5e95b48 JJ |
27 | #include <net/sock.h> |
28 | ||
29 | #include "include/apparmor.h" | |
30 | #include "include/apparmorfs.h" | |
31 | #include "include/audit.h" | |
32 | #include "include/capability.h" | |
33 | #include "include/context.h" | |
34 | #include "include/file.h" | |
35 | #include "include/ipc.h" | |
695b0eb9 | 36 | #include "include/net.h" |
b5e95b48 | 37 | #include "include/path.h" |
637f688d | 38 | #include "include/label.h" |
b5e95b48 | 39 | #include "include/policy.h" |
cff281f6 | 40 | #include "include/policy_ns.h" |
b5e95b48 | 41 | #include "include/procattr.h" |
21fad8c3 | 42 | #include "include/mount.h" |
b5e95b48 JJ |
43 | |
44 | /* Flag indicating whether initialization completed */ | |
545de8fe | 45 | int apparmor_initialized; |
b5e95b48 | 46 | |
d4669f0b JJ |
47 | DEFINE_PER_CPU(struct aa_buffers, aa_buffers); |
48 | ||
49 | ||
b5e95b48 JJ |
50 | /* |
51 | * LSM hook functions | |
52 | */ | |
53 | ||
54 | /* | |
637f688d | 55 | * free the associated aa_task_ctx and put its labels |
b5e95b48 JJ |
56 | */ |
57 | static void apparmor_cred_free(struct cred *cred) | |
58 | { | |
55a26ebf JJ |
59 | aa_free_task_context(cred_ctx(cred)); |
60 | cred_ctx(cred) = NULL; | |
b5e95b48 JJ |
61 | } |
62 | ||
63 | /* | |
64 | * allocate the apparmor part of blank credentials | |
65 | */ | |
66 | static int apparmor_cred_alloc_blank(struct cred *cred, gfp_t gfp) | |
67 | { | |
68 | /* freed by apparmor_cred_free */ | |
55a26ebf JJ |
69 | struct aa_task_ctx *ctx = aa_alloc_task_context(gfp); |
70 | ||
71 | if (!ctx) | |
b5e95b48 JJ |
72 | return -ENOMEM; |
73 | ||
55a26ebf | 74 | cred_ctx(cred) = ctx; |
b5e95b48 JJ |
75 | return 0; |
76 | } | |
77 | ||
78 | /* | |
55a26ebf | 79 | * prepare new aa_task_ctx for modification by prepare_cred block |
b5e95b48 JJ |
80 | */ |
81 | static int apparmor_cred_prepare(struct cred *new, const struct cred *old, | |
82 | gfp_t gfp) | |
83 | { | |
84 | /* freed by apparmor_cred_free */ | |
55a26ebf JJ |
85 | struct aa_task_ctx *ctx = aa_alloc_task_context(gfp); |
86 | ||
87 | if (!ctx) | |
b5e95b48 JJ |
88 | return -ENOMEM; |
89 | ||
55a26ebf JJ |
90 | aa_dup_task_context(ctx, cred_ctx(old)); |
91 | cred_ctx(new) = ctx; | |
b5e95b48 JJ |
92 | return 0; |
93 | } | |
94 | ||
95 | /* | |
96 | * transfer the apparmor data to a blank set of creds | |
97 | */ | |
98 | static void apparmor_cred_transfer(struct cred *new, const struct cred *old) | |
99 | { | |
55a26ebf JJ |
100 | const struct aa_task_ctx *old_ctx = cred_ctx(old); |
101 | struct aa_task_ctx *new_ctx = cred_ctx(new); | |
b5e95b48 | 102 | |
55a26ebf | 103 | aa_dup_task_context(new_ctx, old_ctx); |
b5e95b48 JJ |
104 | } |
105 | ||
106 | static int apparmor_ptrace_access_check(struct task_struct *child, | |
107 | unsigned int mode) | |
108 | { | |
b2d09ae4 JJ |
109 | struct aa_label *tracer, *tracee; |
110 | int error; | |
111 | ||
112 | tracer = begin_current_label_crit_section(); | |
113 | tracee = aa_get_task_label(child); | |
114 | error = aa_may_ptrace(tracer, tracee, | |
115 | mode == PTRACE_MODE_READ ? AA_PTRACE_READ : AA_PTRACE_TRACE); | |
116 | aa_put_label(tracee); | |
117 | end_current_label_crit_section(tracer); | |
118 | ||
119 | return error; | |
b5e95b48 JJ |
120 | } |
121 | ||
122 | static int apparmor_ptrace_traceme(struct task_struct *parent) | |
123 | { | |
b2d09ae4 JJ |
124 | struct aa_label *tracer, *tracee; |
125 | int error; | |
126 | ||
127 | tracee = begin_current_label_crit_section(); | |
128 | tracer = aa_get_task_label(parent); | |
129 | error = aa_may_ptrace(tracer, tracee, AA_PTRACE_TRACE); | |
130 | aa_put_label(tracer); | |
131 | end_current_label_crit_section(tracee); | |
132 | ||
133 | return error; | |
b5e95b48 JJ |
134 | } |
135 | ||
136 | /* Derived from security/commoncap.c:cap_capget */ | |
137 | static int apparmor_capget(struct task_struct *target, kernel_cap_t *effective, | |
138 | kernel_cap_t *inheritable, kernel_cap_t *permitted) | |
139 | { | |
637f688d | 140 | struct aa_label *label; |
b5e95b48 JJ |
141 | const struct cred *cred; |
142 | ||
143 | rcu_read_lock(); | |
144 | cred = __task_cred(target); | |
637f688d | 145 | label = aa_get_newest_cred_label(cred); |
c70c86c4 | 146 | |
b1d9e6b0 CS |
147 | /* |
148 | * cap_capget is stacked ahead of this and will | |
149 | * initialize effective and permitted. | |
150 | */ | |
c70c86c4 JJ |
151 | if (!unconfined(label)) { |
152 | struct aa_profile *profile; | |
153 | struct label_it i; | |
154 | ||
155 | label_for_each_confined(i, label, profile) { | |
156 | if (COMPLAIN_MODE(profile)) | |
157 | continue; | |
158 | *effective = cap_intersect(*effective, | |
159 | profile->caps.allow); | |
160 | *permitted = cap_intersect(*permitted, | |
161 | profile->caps.allow); | |
162 | } | |
b5e95b48 JJ |
163 | } |
164 | rcu_read_unlock(); | |
637f688d | 165 | aa_put_label(label); |
b5e95b48 JJ |
166 | |
167 | return 0; | |
168 | } | |
169 | ||
6a9de491 EP |
170 | static int apparmor_capable(const struct cred *cred, struct user_namespace *ns, |
171 | int cap, int audit) | |
b5e95b48 | 172 | { |
637f688d | 173 | struct aa_label *label; |
b1d9e6b0 CS |
174 | int error = 0; |
175 | ||
637f688d JJ |
176 | label = aa_get_newest_cred_label(cred); |
177 | if (!unconfined(label)) | |
c70c86c4 | 178 | error = aa_capable(label, cap, audit); |
637f688d | 179 | aa_put_label(label); |
cf797c0e | 180 | |
b5e95b48 JJ |
181 | return error; |
182 | } | |
183 | ||
184 | /** | |
185 | * common_perm - basic common permission check wrapper fn for paths | |
186 | * @op: operation being checked | |
187 | * @path: path to check permission of (NOT NULL) | |
188 | * @mask: requested permissions mask | |
189 | * @cond: conditional info for the permission request (NOT NULL) | |
190 | * | |
191 | * Returns: %0 else error code if error or permission denied | |
192 | */ | |
47f6e5cc | 193 | static int common_perm(const char *op, const struct path *path, u32 mask, |
b5e95b48 JJ |
194 | struct path_cond *cond) |
195 | { | |
637f688d | 196 | struct aa_label *label; |
b5e95b48 JJ |
197 | int error = 0; |
198 | ||
637f688d JJ |
199 | label = __begin_current_label_crit_section(); |
200 | if (!unconfined(label)) | |
aebd873e | 201 | error = aa_path_perm(op, label, path, 0, mask, cond); |
637f688d | 202 | __end_current_label_crit_section(label); |
b5e95b48 JJ |
203 | |
204 | return error; | |
205 | } | |
206 | ||
207 | /** | |
31f75bfe | 208 | * common_perm_cond - common permission wrapper around inode cond |
b5e95b48 | 209 | * @op: operation being checked |
31f75bfe | 210 | * @path: location to check (NOT NULL) |
b5e95b48 | 211 | * @mask: requested permissions mask |
b5e95b48 JJ |
212 | * |
213 | * Returns: %0 else error code if error or permission denied | |
214 | */ | |
31f75bfe | 215 | static int common_perm_cond(const char *op, const struct path *path, u32 mask) |
b5e95b48 | 216 | { |
31f75bfe JJ |
217 | struct path_cond cond = { d_backing_inode(path->dentry)->i_uid, |
218 | d_backing_inode(path->dentry)->i_mode | |
219 | }; | |
b5e95b48 | 220 | |
31f75bfe JJ |
221 | if (!path_mediated_fs(path->dentry)) |
222 | return 0; | |
223 | ||
224 | return common_perm(op, path, mask, &cond); | |
b5e95b48 JJ |
225 | } |
226 | ||
227 | /** | |
31f75bfe | 228 | * common_perm_dir_dentry - common permission wrapper when path is dir, dentry |
b5e95b48 | 229 | * @op: operation being checked |
31f75bfe JJ |
230 | * @dir: directory of the dentry (NOT NULL) |
231 | * @dentry: dentry to check (NOT NULL) | |
b5e95b48 | 232 | * @mask: requested permissions mask |
31f75bfe | 233 | * @cond: conditional info for the permission request (NOT NULL) |
b5e95b48 JJ |
234 | * |
235 | * Returns: %0 else error code if error or permission denied | |
236 | */ | |
31f75bfe JJ |
237 | static int common_perm_dir_dentry(const char *op, const struct path *dir, |
238 | struct dentry *dentry, u32 mask, | |
239 | struct path_cond *cond) | |
b5e95b48 | 240 | { |
31f75bfe | 241 | struct path path = { .mnt = dir->mnt, .dentry = dentry }; |
b5e95b48 | 242 | |
31f75bfe | 243 | return common_perm(op, &path, mask, cond); |
b5e95b48 JJ |
244 | } |
245 | ||
246 | /** | |
247 | * common_perm_rm - common permission wrapper for operations doing rm | |
248 | * @op: operation being checked | |
249 | * @dir: directory that the dentry is in (NOT NULL) | |
250 | * @dentry: dentry being rm'd (NOT NULL) | |
251 | * @mask: requested permission mask | |
252 | * | |
253 | * Returns: %0 else error code if error or permission denied | |
254 | */ | |
47f6e5cc | 255 | static int common_perm_rm(const char *op, const struct path *dir, |
b5e95b48 JJ |
256 | struct dentry *dentry, u32 mask) |
257 | { | |
c6f493d6 | 258 | struct inode *inode = d_backing_inode(dentry); |
b5e95b48 JJ |
259 | struct path_cond cond = { }; |
260 | ||
efeee83a | 261 | if (!inode || !path_mediated_fs(dentry)) |
b5e95b48 JJ |
262 | return 0; |
263 | ||
264 | cond.uid = inode->i_uid; | |
265 | cond.mode = inode->i_mode; | |
266 | ||
267 | return common_perm_dir_dentry(op, dir, dentry, mask, &cond); | |
268 | } | |
269 | ||
270 | /** | |
271 | * common_perm_create - common permission wrapper for operations doing create | |
272 | * @op: operation being checked | |
273 | * @dir: directory that dentry will be created in (NOT NULL) | |
274 | * @dentry: dentry to create (NOT NULL) | |
275 | * @mask: request permission mask | |
276 | * @mode: created file mode | |
277 | * | |
278 | * Returns: %0 else error code if error or permission denied | |
279 | */ | |
47f6e5cc | 280 | static int common_perm_create(const char *op, const struct path *dir, |
d6b49f7a | 281 | struct dentry *dentry, u32 mask, umode_t mode) |
b5e95b48 JJ |
282 | { |
283 | struct path_cond cond = { current_fsuid(), mode }; | |
284 | ||
efeee83a | 285 | if (!path_mediated_fs(dir->dentry)) |
b5e95b48 JJ |
286 | return 0; |
287 | ||
288 | return common_perm_dir_dentry(op, dir, dentry, mask, &cond); | |
289 | } | |
290 | ||
989f74e0 | 291 | static int apparmor_path_unlink(const struct path *dir, struct dentry *dentry) |
b5e95b48 JJ |
292 | { |
293 | return common_perm_rm(OP_UNLINK, dir, dentry, AA_MAY_DELETE); | |
294 | } | |
295 | ||
d3607752 | 296 | static int apparmor_path_mkdir(const struct path *dir, struct dentry *dentry, |
4572befe | 297 | umode_t mode) |
b5e95b48 JJ |
298 | { |
299 | return common_perm_create(OP_MKDIR, dir, dentry, AA_MAY_CREATE, | |
300 | S_IFDIR); | |
301 | } | |
302 | ||
989f74e0 | 303 | static int apparmor_path_rmdir(const struct path *dir, struct dentry *dentry) |
b5e95b48 JJ |
304 | { |
305 | return common_perm_rm(OP_RMDIR, dir, dentry, AA_MAY_DELETE); | |
306 | } | |
307 | ||
d3607752 | 308 | static int apparmor_path_mknod(const struct path *dir, struct dentry *dentry, |
04fc66e7 | 309 | umode_t mode, unsigned int dev) |
b5e95b48 JJ |
310 | { |
311 | return common_perm_create(OP_MKNOD, dir, dentry, AA_MAY_CREATE, mode); | |
312 | } | |
313 | ||
81f4c506 | 314 | static int apparmor_path_truncate(const struct path *path) |
b5e95b48 | 315 | { |
e53cfe6c | 316 | return common_perm_cond(OP_TRUNC, path, MAY_WRITE | AA_MAY_SETATTR); |
b5e95b48 JJ |
317 | } |
318 | ||
d3607752 | 319 | static int apparmor_path_symlink(const struct path *dir, struct dentry *dentry, |
b5e95b48 JJ |
320 | const char *old_name) |
321 | { | |
322 | return common_perm_create(OP_SYMLINK, dir, dentry, AA_MAY_CREATE, | |
323 | S_IFLNK); | |
324 | } | |
325 | ||
3ccee46a | 326 | static int apparmor_path_link(struct dentry *old_dentry, const struct path *new_dir, |
b5e95b48 JJ |
327 | struct dentry *new_dentry) |
328 | { | |
637f688d | 329 | struct aa_label *label; |
b5e95b48 JJ |
330 | int error = 0; |
331 | ||
efeee83a | 332 | if (!path_mediated_fs(old_dentry)) |
b5e95b48 JJ |
333 | return 0; |
334 | ||
637f688d JJ |
335 | label = begin_current_label_crit_section(); |
336 | if (!unconfined(label)) | |
8014370f | 337 | error = aa_path_link(label, old_dentry, new_dir, new_dentry); |
637f688d | 338 | end_current_label_crit_section(label); |
cf797c0e | 339 | |
b5e95b48 JJ |
340 | return error; |
341 | } | |
342 | ||
3ccee46a AV |
343 | static int apparmor_path_rename(const struct path *old_dir, struct dentry *old_dentry, |
344 | const struct path *new_dir, struct dentry *new_dentry) | |
b5e95b48 | 345 | { |
637f688d | 346 | struct aa_label *label; |
b5e95b48 JJ |
347 | int error = 0; |
348 | ||
efeee83a | 349 | if (!path_mediated_fs(old_dentry)) |
b5e95b48 JJ |
350 | return 0; |
351 | ||
637f688d JJ |
352 | label = begin_current_label_crit_section(); |
353 | if (!unconfined(label)) { | |
8486adf0 KC |
354 | struct path old_path = { .mnt = old_dir->mnt, |
355 | .dentry = old_dentry }; | |
356 | struct path new_path = { .mnt = new_dir->mnt, | |
357 | .dentry = new_dentry }; | |
c6f493d6 DH |
358 | struct path_cond cond = { d_backing_inode(old_dentry)->i_uid, |
359 | d_backing_inode(old_dentry)->i_mode | |
b5e95b48 JJ |
360 | }; |
361 | ||
aebd873e | 362 | error = aa_path_perm(OP_RENAME_SRC, label, &old_path, 0, |
e53cfe6c JJ |
363 | MAY_READ | AA_MAY_GETATTR | MAY_WRITE | |
364 | AA_MAY_SETATTR | AA_MAY_DELETE, | |
b5e95b48 JJ |
365 | &cond); |
366 | if (!error) | |
aebd873e | 367 | error = aa_path_perm(OP_RENAME_DEST, label, &new_path, |
e53cfe6c | 368 | 0, MAY_WRITE | AA_MAY_SETATTR | |
b5e95b48 JJ |
369 | AA_MAY_CREATE, &cond); |
370 | ||
371 | } | |
637f688d | 372 | end_current_label_crit_section(label); |
cf797c0e | 373 | |
b5e95b48 JJ |
374 | return error; |
375 | } | |
376 | ||
be01f9f2 | 377 | static int apparmor_path_chmod(const struct path *path, umode_t mode) |
b5e95b48 | 378 | { |
31f75bfe | 379 | return common_perm_cond(OP_CHMOD, path, AA_MAY_CHMOD); |
b5e95b48 JJ |
380 | } |
381 | ||
7fd25dac | 382 | static int apparmor_path_chown(const struct path *path, kuid_t uid, kgid_t gid) |
b5e95b48 | 383 | { |
31f75bfe | 384 | return common_perm_cond(OP_CHOWN, path, AA_MAY_CHOWN); |
b5e95b48 JJ |
385 | } |
386 | ||
3f7036a0 | 387 | static int apparmor_inode_getattr(const struct path *path) |
b5e95b48 | 388 | { |
e53cfe6c | 389 | return common_perm_cond(OP_GETATTR, path, AA_MAY_GETATTR); |
b5e95b48 JJ |
390 | } |
391 | ||
83d49856 | 392 | static int apparmor_file_open(struct file *file, const struct cred *cred) |
b5e95b48 | 393 | { |
637f688d JJ |
394 | struct aa_file_ctx *fctx = file_ctx(file); |
395 | struct aa_label *label; | |
b5e95b48 JJ |
396 | int error = 0; |
397 | ||
efeee83a | 398 | if (!path_mediated_fs(file->f_path.dentry)) |
b5e95b48 JJ |
399 | return 0; |
400 | ||
401 | /* If in exec, permission is handled by bprm hooks. | |
402 | * Cache permissions granted by the previous exec check, with | |
403 | * implicit read and executable mmap which are required to | |
404 | * actually execute the image. | |
405 | */ | |
406 | if (current->in_execve) { | |
55a26ebf | 407 | fctx->allow = MAY_EXEC | MAY_READ | AA_EXEC_MMAP; |
b5e95b48 JJ |
408 | return 0; |
409 | } | |
410 | ||
637f688d JJ |
411 | label = aa_get_newest_cred_label(cred); |
412 | if (!unconfined(label)) { | |
496ad9aa | 413 | struct inode *inode = file_inode(file); |
b5e95b48 JJ |
414 | struct path_cond cond = { inode->i_uid, inode->i_mode }; |
415 | ||
aebd873e | 416 | error = aa_path_perm(OP_OPEN, label, &file->f_path, 0, |
b5e95b48 JJ |
417 | aa_map_file_to_perms(file), &cond); |
418 | /* todo cache full allowed permissions set and state */ | |
55a26ebf | 419 | fctx->allow = aa_map_file_to_perms(file); |
b5e95b48 | 420 | } |
637f688d | 421 | aa_put_label(label); |
b5e95b48 JJ |
422 | |
423 | return error; | |
424 | } | |
425 | ||
426 | static int apparmor_file_alloc_security(struct file *file) | |
427 | { | |
cf797c0e JJ |
428 | int error = 0; |
429 | ||
b5e95b48 | 430 | /* freed by apparmor_file_free_security */ |
637f688d | 431 | struct aa_label *label = begin_current_label_crit_section(); |
190a9518 | 432 | file->f_security = aa_alloc_file_ctx(label, GFP_KERNEL); |
2835a13b JJ |
433 | if (!file_ctx(file)) |
434 | error = -ENOMEM; | |
637f688d | 435 | end_current_label_crit_section(label); |
b5e95b48 | 436 | |
cf797c0e | 437 | return error; |
b5e95b48 JJ |
438 | } |
439 | ||
440 | static void apparmor_file_free_security(struct file *file) | |
441 | { | |
2835a13b | 442 | aa_free_file_ctx(file_ctx(file)); |
b5e95b48 JJ |
443 | } |
444 | ||
47f6e5cc | 445 | static int common_file_perm(const char *op, struct file *file, u32 mask) |
b5e95b48 | 446 | { |
190a9518 | 447 | struct aa_label *label; |
b5e95b48 JJ |
448 | int error = 0; |
449 | ||
192ca6b5 JJ |
450 | /* don't reaudit files closed during inheritance */ |
451 | if (file->f_path.dentry == aa_null.dentry) | |
452 | return -EACCES; | |
453 | ||
637f688d | 454 | label = __begin_current_label_crit_section(); |
190a9518 | 455 | error = aa_file_perm(op, label, file, mask); |
637f688d | 456 | __end_current_label_crit_section(label); |
b5e95b48 JJ |
457 | |
458 | return error; | |
459 | } | |
460 | ||
064dc947 JJ |
461 | static int apparmor_file_receive(struct file *file) |
462 | { | |
463 | return common_file_perm(OP_FRECEIVE, file, aa_map_file_to_perms(file)); | |
464 | } | |
465 | ||
b5e95b48 JJ |
466 | static int apparmor_file_permission(struct file *file, int mask) |
467 | { | |
468 | return common_file_perm(OP_FPERM, file, mask); | |
469 | } | |
470 | ||
471 | static int apparmor_file_lock(struct file *file, unsigned int cmd) | |
472 | { | |
473 | u32 mask = AA_MAY_LOCK; | |
474 | ||
475 | if (cmd == F_WRLCK) | |
476 | mask |= MAY_WRITE; | |
477 | ||
478 | return common_file_perm(OP_FLOCK, file, mask); | |
479 | } | |
480 | ||
47f6e5cc | 481 | static int common_mmap(const char *op, struct file *file, unsigned long prot, |
b5e95b48 JJ |
482 | unsigned long flags) |
483 | { | |
b5e95b48 JJ |
484 | int mask = 0; |
485 | ||
637f688d | 486 | if (!file || !file_ctx(file)) |
b5e95b48 JJ |
487 | return 0; |
488 | ||
489 | if (prot & PROT_READ) | |
490 | mask |= MAY_READ; | |
491 | /* | |
492 | * Private mappings don't require write perms since they don't | |
493 | * write back to the files | |
494 | */ | |
495 | if ((prot & PROT_WRITE) && !(flags & MAP_PRIVATE)) | |
496 | mask |= MAY_WRITE; | |
497 | if (prot & PROT_EXEC) | |
498 | mask |= AA_EXEC_MMAP; | |
499 | ||
b5e95b48 JJ |
500 | return common_file_perm(op, file, mask); |
501 | } | |
502 | ||
e5467859 AV |
503 | static int apparmor_mmap_file(struct file *file, unsigned long reqprot, |
504 | unsigned long prot, unsigned long flags) | |
b5e95b48 | 505 | { |
b5e95b48 JJ |
506 | return common_mmap(OP_FMMAP, file, prot, flags); |
507 | } | |
508 | ||
509 | static int apparmor_file_mprotect(struct vm_area_struct *vma, | |
510 | unsigned long reqprot, unsigned long prot) | |
511 | { | |
512 | return common_mmap(OP_FMPROT, vma->vm_file, prot, | |
513 | !(vma->vm_flags & VM_SHARED) ? MAP_PRIVATE : 0); | |
514 | } | |
515 | ||
21fad8c3 JJ |
516 | static int apparmor_sb_mount(const char *dev_name, const struct path *path, |
517 | const char *type, unsigned long flags, void *data) | |
518 | { | |
519 | struct aa_label *label; | |
520 | int error = 0; | |
521 | ||
522 | /* Discard magic */ | |
523 | if ((flags & MS_MGC_MSK) == MS_MGC_VAL) | |
524 | flags &= ~MS_MGC_MSK; | |
525 | ||
526 | flags &= ~AA_MS_IGNORE_MASK; | |
527 | ||
528 | label = __begin_current_label_crit_section(); | |
529 | if (!unconfined(label)) { | |
530 | if (flags & MS_REMOUNT) | |
531 | error = aa_remount(label, path, flags, data); | |
532 | else if (flags & MS_BIND) | |
533 | error = aa_bind_mount(label, path, dev_name, flags); | |
534 | else if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE | | |
535 | MS_UNBINDABLE)) | |
536 | error = aa_mount_change_type(label, path, flags); | |
537 | else if (flags & MS_MOVE) | |
538 | error = aa_move_mount(label, path, dev_name); | |
539 | else | |
540 | error = aa_new_mount(label, dev_name, path, type, | |
541 | flags, data); | |
542 | } | |
543 | __end_current_label_crit_section(label); | |
544 | ||
545 | return error; | |
546 | } | |
547 | ||
548 | static int apparmor_sb_umount(struct vfsmount *mnt, int flags) | |
549 | { | |
550 | struct aa_label *label; | |
551 | int error = 0; | |
552 | ||
553 | label = __begin_current_label_crit_section(); | |
554 | if (!unconfined(label)) | |
555 | error = aa_umount(label, mnt, flags); | |
556 | __end_current_label_crit_section(label); | |
557 | ||
558 | return error; | |
559 | } | |
560 | ||
561 | static int apparmor_sb_pivotroot(const struct path *old_path, | |
562 | const struct path *new_path) | |
563 | { | |
564 | struct aa_label *label; | |
565 | int error = 0; | |
566 | ||
567 | label = aa_get_current_label(); | |
568 | if (!unconfined(label)) | |
569 | error = aa_pivotroot(label, old_path, new_path); | |
570 | aa_put_label(label); | |
571 | ||
572 | return error; | |
573 | } | |
574 | ||
b5e95b48 JJ |
575 | static int apparmor_getprocattr(struct task_struct *task, char *name, |
576 | char **value) | |
577 | { | |
578 | int error = -ENOENT; | |
b5e95b48 JJ |
579 | /* released below */ |
580 | const struct cred *cred = get_task_cred(task); | |
55a26ebf | 581 | struct aa_task_ctx *ctx = cred_ctx(cred); |
637f688d | 582 | struct aa_label *label = NULL; |
b5e95b48 JJ |
583 | |
584 | if (strcmp(name, "current") == 0) | |
637f688d | 585 | label = aa_get_newest_label(ctx->label); |
55a26ebf | 586 | else if (strcmp(name, "prev") == 0 && ctx->previous) |
637f688d | 587 | label = aa_get_newest_label(ctx->previous); |
55a26ebf | 588 | else if (strcmp(name, "exec") == 0 && ctx->onexec) |
637f688d | 589 | label = aa_get_newest_label(ctx->onexec); |
b5e95b48 JJ |
590 | else |
591 | error = -EINVAL; | |
592 | ||
637f688d | 593 | if (label) |
76a1d263 | 594 | error = aa_getprocattr(label, value); |
77b071b3 | 595 | |
637f688d | 596 | aa_put_label(label); |
b5e95b48 JJ |
597 | put_cred(cred); |
598 | ||
599 | return error; | |
600 | } | |
601 | ||
b21507e2 SS |
602 | static int apparmor_setprocattr(const char *name, void *value, |
603 | size_t size) | |
b5e95b48 | 604 | { |
e89b8081 | 605 | char *command, *largs = NULL, *args = value; |
b5e95b48 JJ |
606 | size_t arg_size; |
607 | int error; | |
ef88a7ac | 608 | DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, OP_SETPROCATTR); |
b5e95b48 JJ |
609 | |
610 | if (size == 0) | |
611 | return -EINVAL; | |
b5e95b48 | 612 | |
e89b8081 VN |
613 | /* AppArmor requires that the buffer must be null terminated atm */ |
614 | if (args[size - 1] != '\0') { | |
615 | /* null terminate */ | |
616 | largs = args = kmalloc(size + 1, GFP_KERNEL); | |
617 | if (!args) | |
618 | return -ENOMEM; | |
619 | memcpy(args, value, size); | |
620 | args[size] = '\0'; | |
621 | } | |
622 | ||
623 | error = -EINVAL; | |
b5e95b48 JJ |
624 | args = strim(args); |
625 | command = strsep(&args, " "); | |
626 | if (!args) | |
e89b8081 | 627 | goto out; |
b5e95b48 JJ |
628 | args = skip_spaces(args); |
629 | if (!*args) | |
e89b8081 | 630 | goto out; |
b5e95b48 | 631 | |
d4d03f74 | 632 | arg_size = size - (args - (largs ? largs : (char *) value)); |
b5e95b48 JJ |
633 | if (strcmp(name, "current") == 0) { |
634 | if (strcmp(command, "changehat") == 0) { | |
635 | error = aa_setprocattr_changehat(args, arg_size, | |
df8073c6 | 636 | AA_CHANGE_NOFLAGS); |
b5e95b48 JJ |
637 | } else if (strcmp(command, "permhat") == 0) { |
638 | error = aa_setprocattr_changehat(args, arg_size, | |
df8073c6 | 639 | AA_CHANGE_TEST); |
b5e95b48 | 640 | } else if (strcmp(command, "changeprofile") == 0) { |
df8073c6 | 641 | error = aa_change_profile(args, AA_CHANGE_NOFLAGS); |
b5e95b48 | 642 | } else if (strcmp(command, "permprofile") == 0) { |
df8073c6 | 643 | error = aa_change_profile(args, AA_CHANGE_TEST); |
6c5fc8f1 JJ |
644 | } else if (strcmp(command, "stack") == 0) { |
645 | error = aa_change_profile(args, AA_CHANGE_STACK); | |
3eea57c2 JJ |
646 | } else |
647 | goto fail; | |
b5e95b48 | 648 | } else if (strcmp(name, "exec") == 0) { |
3eea57c2 | 649 | if (strcmp(command, "exec") == 0) |
df8073c6 | 650 | error = aa_change_profile(args, AA_CHANGE_ONEXEC); |
6c5fc8f1 JJ |
651 | else if (strcmp(command, "stack") == 0) |
652 | error = aa_change_profile(args, (AA_CHANGE_ONEXEC | | |
653 | AA_CHANGE_STACK)); | |
3eea57c2 JJ |
654 | else |
655 | goto fail; | |
656 | } else | |
b5e95b48 | 657 | /* only support the "current" and "exec" process attributes */ |
e89b8081 | 658 | goto fail; |
3eea57c2 | 659 | |
b5e95b48 JJ |
660 | if (!error) |
661 | error = size; | |
e89b8081 VN |
662 | out: |
663 | kfree(largs); | |
b5e95b48 | 664 | return error; |
3eea57c2 JJ |
665 | |
666 | fail: | |
637f688d | 667 | aad(&sa)->label = begin_current_label_crit_section(); |
ef88a7ac JJ |
668 | aad(&sa)->info = name; |
669 | aad(&sa)->error = error = -EINVAL; | |
3eea57c2 | 670 | aa_audit_msg(AUDIT_APPARMOR_DENIED, &sa, NULL); |
637f688d | 671 | end_current_label_crit_section(aad(&sa)->label); |
e89b8081 | 672 | goto out; |
b5e95b48 JJ |
673 | } |
674 | ||
fe864821 JJ |
675 | /** |
676 | * apparmor_bprm_committing_creds - do task cleanup on committing new creds | |
677 | * @bprm: binprm for the exec (NOT NULL) | |
678 | */ | |
679 | static void apparmor_bprm_committing_creds(struct linux_binprm *bprm) | |
680 | { | |
637f688d | 681 | struct aa_label *label = aa_current_raw_label(); |
fe864821 JJ |
682 | struct aa_task_ctx *new_ctx = cred_ctx(bprm->cred); |
683 | ||
684 | /* bail out if unconfined or not changing profile */ | |
637f688d JJ |
685 | if ((new_ctx->label->proxy == label->proxy) || |
686 | (unconfined(new_ctx->label))) | |
fe864821 JJ |
687 | return; |
688 | ||
192ca6b5 JJ |
689 | aa_inherit_files(bprm->cred, current->files); |
690 | ||
fe864821 JJ |
691 | current->pdeath_signal = 0; |
692 | ||
637f688d | 693 | /* reset soft limits and set hard limits for the new label */ |
86b92cb7 | 694 | __aa_transition_rlimits(label, new_ctx->label); |
fe864821 JJ |
695 | } |
696 | ||
697 | /** | |
698 | * apparmor_bprm_committed_cred - do cleanup after new creds committed | |
699 | * @bprm: binprm for the exec (NOT NULL) | |
700 | */ | |
701 | static void apparmor_bprm_committed_creds(struct linux_binprm *bprm) | |
702 | { | |
703 | /* TODO: cleanup signals - ipc mediation */ | |
704 | return; | |
705 | } | |
706 | ||
7cb4dc9f JS |
707 | static int apparmor_task_setrlimit(struct task_struct *task, |
708 | unsigned int resource, struct rlimit *new_rlim) | |
b5e95b48 | 709 | { |
637f688d | 710 | struct aa_label *label = __begin_current_label_crit_section(); |
b5e95b48 JJ |
711 | int error = 0; |
712 | ||
637f688d | 713 | if (!unconfined(label)) |
86b92cb7 | 714 | error = aa_task_setrlimit(label, task, resource, new_rlim); |
637f688d | 715 | __end_current_label_crit_section(label); |
b5e95b48 JJ |
716 | |
717 | return error; | |
718 | } | |
719 | ||
84632f19 JJ |
720 | static int apparmor_task_kill(struct task_struct *target, struct siginfo *info, |
721 | int sig, u32 secid) | |
722 | { | |
723 | struct aa_label *cl, *tl; | |
724 | int error; | |
725 | ||
726 | if (secid) | |
727 | /* TODO: after secid to label mapping is done. | |
728 | * Dealing with USB IO specific behavior | |
729 | */ | |
730 | return 0; | |
731 | cl = __begin_current_label_crit_section(); | |
732 | tl = aa_get_task_label(target); | |
733 | error = aa_may_signal(cl, tl, sig); | |
734 | aa_put_label(tl); | |
735 | __end_current_label_crit_section(cl); | |
736 | ||
737 | return error; | |
738 | } | |
739 | ||
695b0eb9 JJ |
740 | /** |
741 | * apparmor_sk_alloc_security - allocate and attach the sk_security field | |
742 | */ | |
743 | static int apparmor_sk_alloc_security(struct sock *sk, int family, gfp_t flags) | |
744 | { | |
745 | struct aa_sk_ctx *ctx; | |
746 | ||
747 | ctx = kzalloc(sizeof(*ctx), flags); | |
748 | if (!ctx) | |
749 | return -ENOMEM; | |
750 | ||
751 | SK_CTX(sk) = ctx; | |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
756 | /** | |
757 | * apparmor_sk_free_security - free the sk_security field | |
758 | */ | |
759 | static void apparmor_sk_free_security(struct sock *sk) | |
760 | { | |
761 | struct aa_sk_ctx *ctx = SK_CTX(sk); | |
762 | ||
763 | SK_CTX(sk) = NULL; | |
764 | aa_put_label(ctx->label); | |
765 | aa_put_label(ctx->peer); | |
766 | path_put(&ctx->path); | |
767 | kfree(ctx); | |
768 | } | |
769 | ||
770 | /** | |
771 | * apparmor_clone_security - clone the sk_security field | |
772 | */ | |
773 | static void apparmor_sk_clone_security(const struct sock *sk, | |
774 | struct sock *newsk) | |
775 | { | |
776 | struct aa_sk_ctx *ctx = SK_CTX(sk); | |
777 | struct aa_sk_ctx *new = SK_CTX(newsk); | |
778 | ||
779 | new->label = aa_get_label(ctx->label); | |
780 | new->peer = aa_get_label(ctx->peer); | |
781 | new->path = ctx->path; | |
782 | path_get(&new->path); | |
783 | } | |
784 | ||
785 | static int aa_sock_create_perm(struct aa_label *label, int family, int type, | |
786 | int protocol) | |
787 | { | |
788 | AA_BUG(!label); | |
789 | AA_BUG(in_interrupt()); | |
790 | ||
791 | return aa_af_perm(label, OP_CREATE, AA_MAY_CREATE, family, type, | |
792 | protocol); | |
793 | } | |
794 | ||
795 | ||
796 | /** | |
797 | * apparmor_socket_create - check perms before creating a new socket | |
798 | */ | |
799 | static int apparmor_socket_create(int family, int type, int protocol, int kern) | |
800 | { | |
801 | struct aa_label *label; | |
802 | int error = 0; | |
803 | ||
804 | label = begin_current_label_crit_section(); | |
805 | if (!(kern || unconfined(label))) | |
806 | error = aa_sock_create_perm(label, family, type, protocol); | |
807 | end_current_label_crit_section(label); | |
808 | ||
809 | return error; | |
810 | } | |
811 | ||
812 | /** | |
813 | * apparmor_socket_post_create - setup the per-socket security struct | |
814 | * | |
815 | * Note: | |
816 | * - kernel sockets currently labeled unconfined but we may want to | |
817 | * move to a special kernel label | |
818 | * - socket may not have sk here if created with sock_create_lite or | |
819 | * sock_alloc. These should be accept cases which will be handled in | |
820 | * sock_graft. | |
821 | */ | |
822 | static int apparmor_socket_post_create(struct socket *sock, int family, | |
823 | int type, int protocol, int kern) | |
824 | { | |
825 | struct aa_label *label; | |
826 | ||
827 | if (kern) { | |
828 | struct aa_ns *ns = aa_get_current_ns(); | |
829 | ||
830 | label = aa_get_label(ns_unconfined(ns)); | |
831 | aa_put_ns(ns); | |
832 | } else | |
833 | label = aa_get_current_label(); | |
834 | ||
835 | if (sock->sk) { | |
836 | struct aa_sk_ctx *ctx = SK_CTX(sock->sk); | |
837 | ||
838 | aa_put_label(ctx->label); | |
839 | ctx->label = aa_get_label(label); | |
840 | } | |
841 | aa_put_label(label); | |
842 | ||
843 | return 0; | |
844 | } | |
845 | ||
846 | /** | |
847 | * apparmor_socket_bind - check perms before bind addr to socket | |
848 | */ | |
849 | static int apparmor_socket_bind(struct socket *sock, | |
850 | struct sockaddr *address, int addrlen) | |
851 | { | |
852 | AA_BUG(!sock); | |
853 | AA_BUG(!sock->sk); | |
854 | AA_BUG(!address); | |
855 | AA_BUG(in_interrupt()); | |
856 | ||
857 | return aa_sk_perm(OP_BIND, AA_MAY_BIND, sock->sk); | |
858 | } | |
859 | ||
860 | /** | |
861 | * apparmor_socket_connect - check perms before connecting @sock to @address | |
862 | */ | |
863 | static int apparmor_socket_connect(struct socket *sock, | |
864 | struct sockaddr *address, int addrlen) | |
865 | { | |
866 | AA_BUG(!sock); | |
867 | AA_BUG(!sock->sk); | |
868 | AA_BUG(!address); | |
869 | AA_BUG(in_interrupt()); | |
870 | ||
871 | return aa_sk_perm(OP_CONNECT, AA_MAY_CONNECT, sock->sk); | |
872 | } | |
873 | ||
874 | /** | |
875 | * apparmor_socket_list - check perms before allowing listen | |
876 | */ | |
877 | static int apparmor_socket_listen(struct socket *sock, int backlog) | |
878 | { | |
879 | AA_BUG(!sock); | |
880 | AA_BUG(!sock->sk); | |
881 | AA_BUG(in_interrupt()); | |
882 | ||
883 | return aa_sk_perm(OP_LISTEN, AA_MAY_LISTEN, sock->sk); | |
884 | } | |
885 | ||
886 | /** | |
887 | * apparmor_socket_accept - check perms before accepting a new connection. | |
888 | * | |
889 | * Note: while @newsock is created and has some information, the accept | |
890 | * has not been done. | |
891 | */ | |
892 | static int apparmor_socket_accept(struct socket *sock, struct socket *newsock) | |
893 | { | |
894 | AA_BUG(!sock); | |
895 | AA_BUG(!sock->sk); | |
896 | AA_BUG(!newsock); | |
897 | AA_BUG(in_interrupt()); | |
898 | ||
899 | return aa_sk_perm(OP_ACCEPT, AA_MAY_ACCEPT, sock->sk); | |
900 | } | |
901 | ||
902 | static int aa_sock_msg_perm(const char *op, u32 request, struct socket *sock, | |
903 | struct msghdr *msg, int size) | |
904 | { | |
905 | AA_BUG(!sock); | |
906 | AA_BUG(!sock->sk); | |
907 | AA_BUG(!msg); | |
908 | AA_BUG(in_interrupt()); | |
909 | ||
910 | return aa_sk_perm(op, request, sock->sk); | |
911 | } | |
912 | ||
913 | /** | |
914 | * apparmor_socket_sendmsg - check perms before sending msg to another socket | |
915 | */ | |
916 | static int apparmor_socket_sendmsg(struct socket *sock, | |
917 | struct msghdr *msg, int size) | |
918 | { | |
919 | return aa_sock_msg_perm(OP_SENDMSG, AA_MAY_SEND, sock, msg, size); | |
920 | } | |
921 | ||
922 | /** | |
923 | * apparmor_socket_recvmsg - check perms before receiving a message | |
924 | */ | |
925 | static int apparmor_socket_recvmsg(struct socket *sock, | |
926 | struct msghdr *msg, int size, int flags) | |
927 | { | |
928 | return aa_sock_msg_perm(OP_RECVMSG, AA_MAY_RECEIVE, sock, msg, size); | |
929 | } | |
930 | ||
931 | /* revaliation, get/set attr, shutdown */ | |
932 | static int aa_sock_perm(const char *op, u32 request, struct socket *sock) | |
933 | { | |
934 | AA_BUG(!sock); | |
935 | AA_BUG(!sock->sk); | |
936 | AA_BUG(in_interrupt()); | |
937 | ||
938 | return aa_sk_perm(op, request, sock->sk); | |
939 | } | |
940 | ||
941 | /** | |
942 | * apparmor_socket_getsockname - check perms before getting the local address | |
943 | */ | |
944 | static int apparmor_socket_getsockname(struct socket *sock) | |
945 | { | |
946 | return aa_sock_perm(OP_GETSOCKNAME, AA_MAY_GETATTR, sock); | |
947 | } | |
948 | ||
949 | /** | |
950 | * apparmor_socket_getpeername - check perms before getting remote address | |
951 | */ | |
952 | static int apparmor_socket_getpeername(struct socket *sock) | |
953 | { | |
954 | return aa_sock_perm(OP_GETPEERNAME, AA_MAY_GETATTR, sock); | |
955 | } | |
956 | ||
957 | /* revaliation, get/set attr, opt */ | |
958 | static int aa_sock_opt_perm(const char *op, u32 request, struct socket *sock, | |
959 | int level, int optname) | |
960 | { | |
961 | AA_BUG(!sock); | |
962 | AA_BUG(!sock->sk); | |
963 | AA_BUG(in_interrupt()); | |
964 | ||
965 | return aa_sk_perm(op, request, sock->sk); | |
966 | } | |
967 | ||
968 | /** | |
969 | * apparmor_getsockopt - check perms before getting socket options | |
970 | */ | |
971 | static int apparmor_socket_getsockopt(struct socket *sock, int level, | |
972 | int optname) | |
973 | { | |
974 | return aa_sock_opt_perm(OP_GETSOCKOPT, AA_MAY_GETOPT, sock, | |
975 | level, optname); | |
976 | } | |
977 | ||
978 | /** | |
979 | * apparmor_setsockopt - check perms before setting socket options | |
980 | */ | |
981 | static int apparmor_socket_setsockopt(struct socket *sock, int level, | |
982 | int optname) | |
983 | { | |
984 | return aa_sock_opt_perm(OP_SETSOCKOPT, AA_MAY_SETOPT, sock, | |
985 | level, optname); | |
986 | } | |
987 | ||
988 | /** | |
989 | * apparmor_socket_shutdown - check perms before shutting down @sock conn | |
990 | */ | |
991 | static int apparmor_socket_shutdown(struct socket *sock, int how) | |
992 | { | |
993 | return aa_sock_perm(OP_SHUTDOWN, AA_MAY_SHUTDOWN, sock); | |
994 | } | |
995 | ||
996 | /** | |
997 | * apparmor_socket_sock_recv_skb - check perms before associating skb to sk | |
998 | * | |
999 | * Note: can not sleep may be called with locks held | |
1000 | * | |
1001 | * dont want protocol specific in __skb_recv_datagram() | |
1002 | * to deny an incoming connection socket_sock_rcv_skb() | |
1003 | */ | |
1004 | static int apparmor_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) | |
1005 | { | |
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | ||
1010 | static struct aa_label *sk_peer_label(struct sock *sk) | |
1011 | { | |
1012 | struct aa_sk_ctx *ctx = SK_CTX(sk); | |
1013 | ||
1014 | if (ctx->peer) | |
1015 | return ctx->peer; | |
1016 | ||
1017 | return ERR_PTR(-ENOPROTOOPT); | |
1018 | } | |
1019 | ||
1020 | /** | |
1021 | * apparmor_socket_getpeersec_stream - get security context of peer | |
1022 | * | |
1023 | * Note: for tcp only valid if using ipsec or cipso on lan | |
1024 | */ | |
1025 | static int apparmor_socket_getpeersec_stream(struct socket *sock, | |
1026 | char __user *optval, | |
1027 | int __user *optlen, | |
1028 | unsigned int len) | |
1029 | { | |
1030 | char *name; | |
1031 | int slen, error = 0; | |
1032 | struct aa_label *label; | |
1033 | struct aa_label *peer; | |
1034 | ||
1035 | label = begin_current_label_crit_section(); | |
1036 | peer = sk_peer_label(sock->sk); | |
1037 | if (IS_ERR(peer)) { | |
1038 | error = PTR_ERR(peer); | |
1039 | goto done; | |
1040 | } | |
1041 | slen = aa_label_asxprint(&name, labels_ns(label), peer, | |
1042 | FLAG_SHOW_MODE | FLAG_VIEW_SUBNS | | |
1043 | FLAG_HIDDEN_UNCONFINED, GFP_KERNEL); | |
1044 | /* don't include terminating \0 in slen, it breaks some apps */ | |
1045 | if (slen < 0) { | |
1046 | error = -ENOMEM; | |
1047 | } else { | |
1048 | if (slen > len) { | |
1049 | error = -ERANGE; | |
1050 | } else if (copy_to_user(optval, name, slen)) { | |
1051 | error = -EFAULT; | |
1052 | goto out; | |
1053 | } | |
1054 | if (put_user(slen, optlen)) | |
1055 | error = -EFAULT; | |
1056 | out: | |
1057 | kfree(name); | |
1058 | ||
1059 | } | |
1060 | ||
1061 | done: | |
1062 | end_current_label_crit_section(label); | |
1063 | ||
1064 | return error; | |
1065 | } | |
1066 | ||
1067 | /** | |
1068 | * apparmor_socket_getpeersec_dgram - get security label of packet | |
1069 | * @sock: the peer socket | |
1070 | * @skb: packet data | |
1071 | * @secid: pointer to where to put the secid of the packet | |
1072 | * | |
1073 | * Sets the netlabel socket state on sk from parent | |
1074 | */ | |
1075 | static int apparmor_socket_getpeersec_dgram(struct socket *sock, | |
1076 | struct sk_buff *skb, u32 *secid) | |
1077 | ||
1078 | { | |
1079 | /* TODO: requires secid support */ | |
1080 | return -ENOPROTOOPT; | |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * apparmor_sock_graft - Initialize newly created socket | |
1085 | * @sk: child sock | |
1086 | * @parent: parent socket | |
1087 | * | |
1088 | * Note: could set off of SOCK_CTX(parent) but need to track inode and we can | |
1089 | * just set sk security information off of current creating process label | |
1090 | * Labeling of sk for accept case - probably should be sock based | |
1091 | * instead of task, because of the case where an implicitly labeled | |
1092 | * socket is shared by different tasks. | |
1093 | */ | |
1094 | static void apparmor_sock_graft(struct sock *sk, struct socket *parent) | |
1095 | { | |
1096 | struct aa_sk_ctx *ctx = SK_CTX(sk); | |
1097 | ||
1098 | if (!ctx->label) | |
1099 | ctx->label = aa_get_current_label(); | |
1100 | } | |
1101 | ||
ca97d939 | 1102 | static struct security_hook_list apparmor_hooks[] __lsm_ro_after_init = { |
e20b043a CS |
1103 | LSM_HOOK_INIT(ptrace_access_check, apparmor_ptrace_access_check), |
1104 | LSM_HOOK_INIT(ptrace_traceme, apparmor_ptrace_traceme), | |
1105 | LSM_HOOK_INIT(capget, apparmor_capget), | |
1106 | LSM_HOOK_INIT(capable, apparmor_capable), | |
1107 | ||
21fad8c3 JJ |
1108 | LSM_HOOK_INIT(sb_mount, apparmor_sb_mount), |
1109 | LSM_HOOK_INIT(sb_umount, apparmor_sb_umount), | |
1110 | LSM_HOOK_INIT(sb_pivotroot, apparmor_sb_pivotroot), | |
1111 | ||
e20b043a CS |
1112 | LSM_HOOK_INIT(path_link, apparmor_path_link), |
1113 | LSM_HOOK_INIT(path_unlink, apparmor_path_unlink), | |
1114 | LSM_HOOK_INIT(path_symlink, apparmor_path_symlink), | |
1115 | LSM_HOOK_INIT(path_mkdir, apparmor_path_mkdir), | |
1116 | LSM_HOOK_INIT(path_rmdir, apparmor_path_rmdir), | |
1117 | LSM_HOOK_INIT(path_mknod, apparmor_path_mknod), | |
1118 | LSM_HOOK_INIT(path_rename, apparmor_path_rename), | |
1119 | LSM_HOOK_INIT(path_chmod, apparmor_path_chmod), | |
1120 | LSM_HOOK_INIT(path_chown, apparmor_path_chown), | |
1121 | LSM_HOOK_INIT(path_truncate, apparmor_path_truncate), | |
1122 | LSM_HOOK_INIT(inode_getattr, apparmor_inode_getattr), | |
1123 | ||
1124 | LSM_HOOK_INIT(file_open, apparmor_file_open), | |
064dc947 | 1125 | LSM_HOOK_INIT(file_receive, apparmor_file_receive), |
e20b043a CS |
1126 | LSM_HOOK_INIT(file_permission, apparmor_file_permission), |
1127 | LSM_HOOK_INIT(file_alloc_security, apparmor_file_alloc_security), | |
1128 | LSM_HOOK_INIT(file_free_security, apparmor_file_free_security), | |
1129 | LSM_HOOK_INIT(mmap_file, apparmor_mmap_file), | |
e20b043a CS |
1130 | LSM_HOOK_INIT(file_mprotect, apparmor_file_mprotect), |
1131 | LSM_HOOK_INIT(file_lock, apparmor_file_lock), | |
1132 | ||
1133 | LSM_HOOK_INIT(getprocattr, apparmor_getprocattr), | |
1134 | LSM_HOOK_INIT(setprocattr, apparmor_setprocattr), | |
1135 | ||
695b0eb9 JJ |
1136 | LSM_HOOK_INIT(sk_alloc_security, apparmor_sk_alloc_security), |
1137 | LSM_HOOK_INIT(sk_free_security, apparmor_sk_free_security), | |
1138 | LSM_HOOK_INIT(sk_clone_security, apparmor_sk_clone_security), | |
1139 | ||
1140 | LSM_HOOK_INIT(socket_create, apparmor_socket_create), | |
1141 | LSM_HOOK_INIT(socket_post_create, apparmor_socket_post_create), | |
1142 | LSM_HOOK_INIT(socket_bind, apparmor_socket_bind), | |
1143 | LSM_HOOK_INIT(socket_connect, apparmor_socket_connect), | |
1144 | LSM_HOOK_INIT(socket_listen, apparmor_socket_listen), | |
1145 | LSM_HOOK_INIT(socket_accept, apparmor_socket_accept), | |
1146 | LSM_HOOK_INIT(socket_sendmsg, apparmor_socket_sendmsg), | |
1147 | LSM_HOOK_INIT(socket_recvmsg, apparmor_socket_recvmsg), | |
1148 | LSM_HOOK_INIT(socket_getsockname, apparmor_socket_getsockname), | |
1149 | LSM_HOOK_INIT(socket_getpeername, apparmor_socket_getpeername), | |
1150 | LSM_HOOK_INIT(socket_getsockopt, apparmor_socket_getsockopt), | |
1151 | LSM_HOOK_INIT(socket_setsockopt, apparmor_socket_setsockopt), | |
1152 | LSM_HOOK_INIT(socket_shutdown, apparmor_socket_shutdown), | |
1153 | LSM_HOOK_INIT(socket_sock_rcv_skb, apparmor_socket_sock_rcv_skb), | |
1154 | LSM_HOOK_INIT(socket_getpeersec_stream, | |
1155 | apparmor_socket_getpeersec_stream), | |
1156 | LSM_HOOK_INIT(socket_getpeersec_dgram, | |
1157 | apparmor_socket_getpeersec_dgram), | |
1158 | LSM_HOOK_INIT(sock_graft, apparmor_sock_graft), | |
1159 | ||
e20b043a CS |
1160 | LSM_HOOK_INIT(cred_alloc_blank, apparmor_cred_alloc_blank), |
1161 | LSM_HOOK_INIT(cred_free, apparmor_cred_free), | |
1162 | LSM_HOOK_INIT(cred_prepare, apparmor_cred_prepare), | |
1163 | LSM_HOOK_INIT(cred_transfer, apparmor_cred_transfer), | |
1164 | ||
1165 | LSM_HOOK_INIT(bprm_set_creds, apparmor_bprm_set_creds), | |
1166 | LSM_HOOK_INIT(bprm_committing_creds, apparmor_bprm_committing_creds), | |
1167 | LSM_HOOK_INIT(bprm_committed_creds, apparmor_bprm_committed_creds), | |
1168 | LSM_HOOK_INIT(bprm_secureexec, apparmor_bprm_secureexec), | |
1169 | ||
1170 | LSM_HOOK_INIT(task_setrlimit, apparmor_task_setrlimit), | |
84632f19 | 1171 | LSM_HOOK_INIT(task_kill, apparmor_task_kill), |
b5e95b48 JJ |
1172 | }; |
1173 | ||
1174 | /* | |
1175 | * AppArmor sysfs module parameters | |
1176 | */ | |
1177 | ||
101d6c82 SR |
1178 | static int param_set_aabool(const char *val, const struct kernel_param *kp); |
1179 | static int param_get_aabool(char *buffer, const struct kernel_param *kp); | |
b8aa09fd | 1180 | #define param_check_aabool param_check_bool |
9c27847d | 1181 | static const struct kernel_param_ops param_ops_aabool = { |
6a4c2643 | 1182 | .flags = KERNEL_PARAM_OPS_FL_NOARG, |
101d6c82 SR |
1183 | .set = param_set_aabool, |
1184 | .get = param_get_aabool | |
1185 | }; | |
b5e95b48 | 1186 | |
101d6c82 SR |
1187 | static int param_set_aauint(const char *val, const struct kernel_param *kp); |
1188 | static int param_get_aauint(char *buffer, const struct kernel_param *kp); | |
b8aa09fd | 1189 | #define param_check_aauint param_check_uint |
9c27847d | 1190 | static const struct kernel_param_ops param_ops_aauint = { |
101d6c82 SR |
1191 | .set = param_set_aauint, |
1192 | .get = param_get_aauint | |
1193 | }; | |
b5e95b48 | 1194 | |
101d6c82 SR |
1195 | static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp); |
1196 | static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp); | |
b8aa09fd | 1197 | #define param_check_aalockpolicy param_check_bool |
9c27847d | 1198 | static const struct kernel_param_ops param_ops_aalockpolicy = { |
6a4c2643 | 1199 | .flags = KERNEL_PARAM_OPS_FL_NOARG, |
101d6c82 SR |
1200 | .set = param_set_aalockpolicy, |
1201 | .get = param_get_aalockpolicy | |
1202 | }; | |
b5e95b48 JJ |
1203 | |
1204 | static int param_set_audit(const char *val, struct kernel_param *kp); | |
1205 | static int param_get_audit(char *buffer, struct kernel_param *kp); | |
b5e95b48 JJ |
1206 | |
1207 | static int param_set_mode(const char *val, struct kernel_param *kp); | |
1208 | static int param_get_mode(char *buffer, struct kernel_param *kp); | |
b5e95b48 JJ |
1209 | |
1210 | /* Flag values, also controllable via /sys/module/apparmor/parameters | |
1211 | * We define special types as we want to do additional mediation. | |
1212 | */ | |
1213 | ||
1214 | /* AppArmor global enforcement switch - complain, enforce, kill */ | |
1215 | enum profile_mode aa_g_profile_mode = APPARMOR_ENFORCE; | |
1216 | module_param_call(mode, param_set_mode, param_get_mode, | |
1217 | &aa_g_profile_mode, S_IRUSR | S_IWUSR); | |
1218 | ||
6059f71f | 1219 | /* whether policy verification hashing is enabled */ |
7616ac70 | 1220 | bool aa_g_hash_policy = IS_ENABLED(CONFIG_SECURITY_APPARMOR_HASH_DEFAULT); |
3ccb76c5 | 1221 | #ifdef CONFIG_SECURITY_APPARMOR_HASH |
6059f71f | 1222 | module_param_named(hash_policy, aa_g_hash_policy, aabool, S_IRUSR | S_IWUSR); |
7616ac70 | 1223 | #endif |
6059f71f | 1224 | |
b5e95b48 | 1225 | /* Debug mode */ |
eea7a05f | 1226 | bool aa_g_debug = IS_ENABLED(CONFIG_SECURITY_APPARMOR_DEBUG_MESSAGES); |
b5e95b48 JJ |
1227 | module_param_named(debug, aa_g_debug, aabool, S_IRUSR | S_IWUSR); |
1228 | ||
1229 | /* Audit mode */ | |
1230 | enum audit_mode aa_g_audit; | |
1231 | module_param_call(audit, param_set_audit, param_get_audit, | |
1232 | &aa_g_audit, S_IRUSR | S_IWUSR); | |
1233 | ||
1234 | /* Determines if audit header is included in audited messages. This | |
1235 | * provides more context if the audit daemon is not running | |
1236 | */ | |
90ab5ee9 | 1237 | bool aa_g_audit_header = 1; |
b5e95b48 JJ |
1238 | module_param_named(audit_header, aa_g_audit_header, aabool, |
1239 | S_IRUSR | S_IWUSR); | |
1240 | ||
1241 | /* lock out loading/removal of policy | |
1242 | * TODO: add in at boot loading of policy, which is the only way to | |
1243 | * load policy, if lock_policy is set | |
1244 | */ | |
90ab5ee9 | 1245 | bool aa_g_lock_policy; |
b5e95b48 JJ |
1246 | module_param_named(lock_policy, aa_g_lock_policy, aalockpolicy, |
1247 | S_IRUSR | S_IWUSR); | |
1248 | ||
1249 | /* Syscall logging mode */ | |
90ab5ee9 | 1250 | bool aa_g_logsyscall; |
b5e95b48 JJ |
1251 | module_param_named(logsyscall, aa_g_logsyscall, aabool, S_IRUSR | S_IWUSR); |
1252 | ||
1253 | /* Maximum pathname length before accesses will start getting rejected */ | |
1254 | unsigned int aa_g_path_max = 2 * PATH_MAX; | |
622f6e32 | 1255 | module_param_named(path_max, aa_g_path_max, aauint, S_IRUSR); |
b5e95b48 JJ |
1256 | |
1257 | /* Determines how paranoid loading of policy is and how much verification | |
1258 | * on the loaded policy is done. | |
abbf8734 JJ |
1259 | * DEPRECATED: read only as strict checking of load is always done now |
1260 | * that none root users (user namespaces) can load policy. | |
b5e95b48 | 1261 | */ |
90ab5ee9 | 1262 | bool aa_g_paranoid_load = 1; |
abbf8734 | 1263 | module_param_named(paranoid_load, aa_g_paranoid_load, aabool, S_IRUGO); |
b5e95b48 JJ |
1264 | |
1265 | /* Boot time disable flag */ | |
90ab5ee9 | 1266 | static bool apparmor_enabled = CONFIG_SECURITY_APPARMOR_BOOTPARAM_VALUE; |
c611616c | 1267 | module_param_named(enabled, apparmor_enabled, bool, S_IRUGO); |
b5e95b48 JJ |
1268 | |
1269 | static int __init apparmor_enabled_setup(char *str) | |
1270 | { | |
1271 | unsigned long enabled; | |
29707b20 | 1272 | int error = kstrtoul(str, 0, &enabled); |
b5e95b48 JJ |
1273 | if (!error) |
1274 | apparmor_enabled = enabled ? 1 : 0; | |
1275 | return 1; | |
1276 | } | |
1277 | ||
1278 | __setup("apparmor=", apparmor_enabled_setup); | |
1279 | ||
1280 | /* set global flag turning off the ability to load policy */ | |
101d6c82 | 1281 | static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp) |
b5e95b48 | 1282 | { |
545de8fe JJ |
1283 | if (!apparmor_enabled) |
1284 | return -EINVAL; | |
1285 | if (apparmor_initialized && !policy_admin_capable(NULL)) | |
b5e95b48 | 1286 | return -EPERM; |
b5e95b48 JJ |
1287 | return param_set_bool(val, kp); |
1288 | } | |
1289 | ||
101d6c82 | 1290 | static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp) |
b5e95b48 | 1291 | { |
ca4bd5ae JJ |
1292 | if (!apparmor_enabled) |
1293 | return -EINVAL; | |
545de8fe JJ |
1294 | if (apparmor_initialized && !policy_view_capable(NULL)) |
1295 | return -EPERM; | |
b5e95b48 JJ |
1296 | return param_get_bool(buffer, kp); |
1297 | } | |
1298 | ||
101d6c82 | 1299 | static int param_set_aabool(const char *val, const struct kernel_param *kp) |
b5e95b48 | 1300 | { |
ca4bd5ae JJ |
1301 | if (!apparmor_enabled) |
1302 | return -EINVAL; | |
545de8fe JJ |
1303 | if (apparmor_initialized && !policy_admin_capable(NULL)) |
1304 | return -EPERM; | |
b5e95b48 JJ |
1305 | return param_set_bool(val, kp); |
1306 | } | |
1307 | ||
101d6c82 | 1308 | static int param_get_aabool(char *buffer, const struct kernel_param *kp) |
b5e95b48 | 1309 | { |
ca4bd5ae JJ |
1310 | if (!apparmor_enabled) |
1311 | return -EINVAL; | |
545de8fe JJ |
1312 | if (apparmor_initialized && !policy_view_capable(NULL)) |
1313 | return -EPERM; | |
b5e95b48 JJ |
1314 | return param_get_bool(buffer, kp); |
1315 | } | |
1316 | ||
101d6c82 | 1317 | static int param_set_aauint(const char *val, const struct kernel_param *kp) |
b5e95b48 | 1318 | { |
39d84824 JJ |
1319 | int error; |
1320 | ||
ca4bd5ae JJ |
1321 | if (!apparmor_enabled) |
1322 | return -EINVAL; | |
39d84824 JJ |
1323 | /* file is ro but enforce 2nd line check */ |
1324 | if (apparmor_initialized) | |
545de8fe | 1325 | return -EPERM; |
39d84824 JJ |
1326 | |
1327 | error = param_set_uint(val, kp); | |
1328 | pr_info("AppArmor: buffer size set to %d bytes\n", aa_g_path_max); | |
1329 | ||
1330 | return error; | |
b5e95b48 JJ |
1331 | } |
1332 | ||
101d6c82 | 1333 | static int param_get_aauint(char *buffer, const struct kernel_param *kp) |
b5e95b48 | 1334 | { |
ca4bd5ae JJ |
1335 | if (!apparmor_enabled) |
1336 | return -EINVAL; | |
545de8fe JJ |
1337 | if (apparmor_initialized && !policy_view_capable(NULL)) |
1338 | return -EPERM; | |
b5e95b48 JJ |
1339 | return param_get_uint(buffer, kp); |
1340 | } | |
1341 | ||
1342 | static int param_get_audit(char *buffer, struct kernel_param *kp) | |
1343 | { | |
b5e95b48 JJ |
1344 | if (!apparmor_enabled) |
1345 | return -EINVAL; | |
545de8fe JJ |
1346 | if (apparmor_initialized && !policy_view_capable(NULL)) |
1347 | return -EPERM; | |
b5e95b48 JJ |
1348 | return sprintf(buffer, "%s", audit_mode_names[aa_g_audit]); |
1349 | } | |
1350 | ||
1351 | static int param_set_audit(const char *val, struct kernel_param *kp) | |
1352 | { | |
1353 | int i; | |
b5e95b48 JJ |
1354 | |
1355 | if (!apparmor_enabled) | |
1356 | return -EINVAL; | |
b5e95b48 JJ |
1357 | if (!val) |
1358 | return -EINVAL; | |
545de8fe JJ |
1359 | if (apparmor_initialized && !policy_admin_capable(NULL)) |
1360 | return -EPERM; | |
b5e95b48 JJ |
1361 | |
1362 | for (i = 0; i < AUDIT_MAX_INDEX; i++) { | |
1363 | if (strcmp(val, audit_mode_names[i]) == 0) { | |
1364 | aa_g_audit = i; | |
1365 | return 0; | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | return -EINVAL; | |
1370 | } | |
1371 | ||
1372 | static int param_get_mode(char *buffer, struct kernel_param *kp) | |
1373 | { | |
b5e95b48 JJ |
1374 | if (!apparmor_enabled) |
1375 | return -EINVAL; | |
545de8fe JJ |
1376 | if (apparmor_initialized && !policy_view_capable(NULL)) |
1377 | return -EPERM; | |
b5e95b48 | 1378 | |
0d259f04 | 1379 | return sprintf(buffer, "%s", aa_profile_mode_names[aa_g_profile_mode]); |
b5e95b48 JJ |
1380 | } |
1381 | ||
1382 | static int param_set_mode(const char *val, struct kernel_param *kp) | |
1383 | { | |
1384 | int i; | |
b5e95b48 JJ |
1385 | |
1386 | if (!apparmor_enabled) | |
1387 | return -EINVAL; | |
b5e95b48 JJ |
1388 | if (!val) |
1389 | return -EINVAL; | |
545de8fe JJ |
1390 | if (apparmor_initialized && !policy_admin_capable(NULL)) |
1391 | return -EPERM; | |
b5e95b48 | 1392 | |
0d259f04 JJ |
1393 | for (i = 0; i < APPARMOR_MODE_NAMES_MAX_INDEX; i++) { |
1394 | if (strcmp(val, aa_profile_mode_names[i]) == 0) { | |
b5e95b48 JJ |
1395 | aa_g_profile_mode = i; |
1396 | return 0; | |
1397 | } | |
1398 | } | |
1399 | ||
1400 | return -EINVAL; | |
1401 | } | |
1402 | ||
1403 | /* | |
1404 | * AppArmor init functions | |
1405 | */ | |
1406 | ||
1407 | /** | |
55a26ebf | 1408 | * set_init_ctx - set a task context and profile on the first task. |
b5e95b48 JJ |
1409 | * |
1410 | * TODO: allow setting an alternate profile than unconfined | |
1411 | */ | |
55a26ebf | 1412 | static int __init set_init_ctx(void) |
b5e95b48 JJ |
1413 | { |
1414 | struct cred *cred = (struct cred *)current->real_cred; | |
55a26ebf | 1415 | struct aa_task_ctx *ctx; |
b5e95b48 | 1416 | |
55a26ebf JJ |
1417 | ctx = aa_alloc_task_context(GFP_KERNEL); |
1418 | if (!ctx) | |
b5e95b48 JJ |
1419 | return -ENOMEM; |
1420 | ||
637f688d | 1421 | ctx->label = aa_get_label(ns_unconfined(root_ns)); |
55a26ebf | 1422 | cred_ctx(cred) = ctx; |
b5e95b48 JJ |
1423 | |
1424 | return 0; | |
1425 | } | |
1426 | ||
d4669f0b JJ |
1427 | static void destroy_buffers(void) |
1428 | { | |
1429 | u32 i, j; | |
1430 | ||
1431 | for_each_possible_cpu(i) { | |
1432 | for_each_cpu_buffer(j) { | |
1433 | kfree(per_cpu(aa_buffers, i).buf[j]); | |
1434 | per_cpu(aa_buffers, i).buf[j] = NULL; | |
1435 | } | |
1436 | } | |
1437 | } | |
1438 | ||
1439 | static int __init alloc_buffers(void) | |
1440 | { | |
1441 | u32 i, j; | |
1442 | ||
1443 | for_each_possible_cpu(i) { | |
1444 | for_each_cpu_buffer(j) { | |
1445 | char *buffer; | |
1446 | ||
1447 | if (cpu_to_node(i) > num_online_nodes()) | |
1448 | /* fallback to kmalloc for offline nodes */ | |
1449 | buffer = kmalloc(aa_g_path_max, GFP_KERNEL); | |
1450 | else | |
1451 | buffer = kmalloc_node(aa_g_path_max, GFP_KERNEL, | |
1452 | cpu_to_node(i)); | |
1453 | if (!buffer) { | |
1454 | destroy_buffers(); | |
1455 | return -ENOMEM; | |
1456 | } | |
1457 | per_cpu(aa_buffers, i).buf[j] = buffer; | |
1458 | } | |
1459 | } | |
1460 | ||
1461 | return 0; | |
1462 | } | |
1463 | ||
e3ea1ca5 TH |
1464 | #ifdef CONFIG_SYSCTL |
1465 | static int apparmor_dointvec(struct ctl_table *table, int write, | |
1466 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
1467 | { | |
1468 | if (!policy_admin_capable(NULL)) | |
1469 | return -EPERM; | |
1470 | if (!apparmor_enabled) | |
1471 | return -EINVAL; | |
1472 | ||
1473 | return proc_dointvec(table, write, buffer, lenp, ppos); | |
1474 | } | |
1475 | ||
1476 | static struct ctl_path apparmor_sysctl_path[] = { | |
1477 | { .procname = "kernel", }, | |
1478 | { } | |
1479 | }; | |
1480 | ||
1481 | static struct ctl_table apparmor_sysctl_table[] = { | |
1482 | { | |
1483 | .procname = "unprivileged_userns_apparmor_policy", | |
1484 | .data = &unprivileged_userns_apparmor_policy, | |
1485 | .maxlen = sizeof(int), | |
1486 | .mode = 0600, | |
1487 | .proc_handler = apparmor_dointvec, | |
1488 | }, | |
1489 | { } | |
1490 | }; | |
1491 | ||
1492 | static int __init apparmor_init_sysctl(void) | |
1493 | { | |
1494 | return register_sysctl_paths(apparmor_sysctl_path, | |
1495 | apparmor_sysctl_table) ? 0 : -ENOMEM; | |
1496 | } | |
1497 | #else | |
1498 | static inline int apparmor_init_sysctl(void) | |
1499 | { | |
1500 | return 0; | |
1501 | } | |
1502 | #endif /* CONFIG_SYSCTL */ | |
1503 | ||
b5e95b48 JJ |
1504 | static int __init apparmor_init(void) |
1505 | { | |
1506 | int error; | |
1507 | ||
b1d9e6b0 | 1508 | if (!apparmor_enabled || !security_module_enable("apparmor")) { |
b5e95b48 JJ |
1509 | aa_info_message("AppArmor disabled by boot time parameter"); |
1510 | apparmor_enabled = 0; | |
1511 | return 0; | |
1512 | } | |
1513 | ||
11c236b8 JJ |
1514 | error = aa_setup_dfa_engine(); |
1515 | if (error) { | |
1516 | AA_ERROR("Unable to setup dfa engine\n"); | |
1517 | goto alloc_out; | |
1518 | } | |
1519 | ||
b5e95b48 JJ |
1520 | error = aa_alloc_root_ns(); |
1521 | if (error) { | |
1522 | AA_ERROR("Unable to allocate default profile namespace\n"); | |
1523 | goto alloc_out; | |
1524 | } | |
1525 | ||
e3ea1ca5 TH |
1526 | error = apparmor_init_sysctl(); |
1527 | if (error) { | |
1528 | AA_ERROR("Unable to register sysctls\n"); | |
1529 | goto alloc_out; | |
1530 | ||
1531 | } | |
1532 | ||
d4669f0b JJ |
1533 | error = alloc_buffers(); |
1534 | if (error) { | |
1535 | AA_ERROR("Unable to allocate work buffers\n"); | |
1536 | goto buffers_out; | |
1537 | } | |
1538 | ||
55a26ebf | 1539 | error = set_init_ctx(); |
b5e95b48 JJ |
1540 | if (error) { |
1541 | AA_ERROR("Failed to set context on init task\n"); | |
b1d9e6b0 | 1542 | aa_free_root_ns(); |
d4669f0b | 1543 | goto buffers_out; |
b5e95b48 | 1544 | } |
d69dece5 CS |
1545 | security_add_hooks(apparmor_hooks, ARRAY_SIZE(apparmor_hooks), |
1546 | "apparmor"); | |
b5e95b48 JJ |
1547 | |
1548 | /* Report that AppArmor successfully initialized */ | |
1549 | apparmor_initialized = 1; | |
1550 | if (aa_g_profile_mode == APPARMOR_COMPLAIN) | |
1551 | aa_info_message("AppArmor initialized: complain mode enabled"); | |
1552 | else if (aa_g_profile_mode == APPARMOR_KILL) | |
1553 | aa_info_message("AppArmor initialized: kill mode enabled"); | |
1554 | else | |
1555 | aa_info_message("AppArmor initialized"); | |
1556 | ||
1557 | return error; | |
1558 | ||
d4669f0b JJ |
1559 | buffers_out: |
1560 | destroy_buffers(); | |
1561 | ||
b5e95b48 JJ |
1562 | alloc_out: |
1563 | aa_destroy_aafs(); | |
11c236b8 | 1564 | aa_teardown_dfa_engine(); |
b5e95b48 JJ |
1565 | |
1566 | apparmor_enabled = 0; | |
1567 | return error; | |
b5e95b48 JJ |
1568 | } |
1569 | ||
1570 | security_initcall(apparmor_init); |