root/security/security.c

DEFINITIONS

1. is_enabled
2. set_enabled
3. exists_ordered_lsm
4. append_ordered_lsm
5. lsm_allowed
6. lsm_set_blob_size
7. lsm_set_blob_sizes
8. prepare_lsm
9. initialize_lsm
10. ordered_lsm_parse
11. ordered_lsm_init
12. early_security_init
13. security_init
14. choose_major_lsm
15. choose_lsm_order
16. enable_debug
17. match_last_lsm
18. lsm_append
19. security_add_hooks
20. call_blocking_lsm_notifier
21. register_blocking_lsm_notifier
22. unregister_blocking_lsm_notifier
23. lsm_cred_alloc
24. lsm_early_cred
25. lsm_file_alloc
26. lsm_inode_alloc
27. lsm_task_alloc
28. lsm_ipc_alloc
29. lsm_msg_msg_alloc
30. lsm_early_task
31. security_binder_set_context_mgr
32. security_binder_transaction
33. security_binder_transfer_binder
34. security_binder_transfer_file
35. security_ptrace_access_check
36. security_ptrace_traceme
37. security_capget
38. security_capset
39. security_capable
40. security_quotactl
41. security_quota_on
42. security_syslog
43. security_settime64
44. security_vm_enough_memory_mm
45. security_bprm_set_creds
46. security_bprm_check
47. security_bprm_committing_creds
48. security_bprm_committed_creds
49. security_fs_context_dup
50. security_fs_context_parse_param
51. security_sb_alloc
52. security_sb_free
53. security_free_mnt_opts
54. security_sb_eat_lsm_opts
55. security_sb_remount
56. security_sb_kern_mount
57. security_sb_show_options
58. security_sb_statfs
59. security_sb_mount
60. security_sb_umount
61. security_sb_pivotroot
62. security_sb_set_mnt_opts
63. security_sb_clone_mnt_opts
64. security_add_mnt_opt
65. security_move_mount
66. security_path_notify
67. security_inode_alloc
68. inode_free_by_rcu
69. security_inode_free
70. security_dentry_init_security
71. security_dentry_create_files_as
72. security_inode_init_security
73. security_old_inode_init_security
74. security_path_mknod
75. security_path_mkdir
76. security_path_rmdir
77. security_path_unlink
78. security_path_symlink
79. security_path_link
80. security_path_rename
81. security_path_truncate
82. security_path_chmod
83. security_path_chown
84. security_path_chroot
85. security_inode_create
86. security_inode_link
87. security_inode_unlink
88. security_inode_symlink
89. security_inode_mkdir
90. security_inode_rmdir
91. security_inode_mknod
92. security_inode_rename
93. security_inode_readlink
94. security_inode_follow_link
95. security_inode_permission
96. security_inode_setattr
97. security_inode_getattr
98. security_inode_setxattr
99. security_inode_post_setxattr
100. security_inode_getxattr
101. security_inode_listxattr
102. security_inode_removexattr
103. security_inode_need_killpriv
104. security_inode_killpriv
105. security_inode_getsecurity
106. security_inode_setsecurity
107. security_inode_listsecurity
108. security_inode_getsecid
109. security_inode_copy_up
110. security_inode_copy_up_xattr
111. security_kernfs_init_security
112. security_file_permission
113. security_file_alloc
114. security_file_free
115. security_file_ioctl
116. mmap_prot
117. security_mmap_file
118. security_mmap_addr
119. security_file_mprotect
120. security_file_lock
121. security_file_fcntl
122. security_file_set_fowner
123. security_file_send_sigiotask
124. security_file_receive
125. security_file_open
126. security_task_alloc
127. security_task_free
128. security_cred_alloc_blank
129. security_cred_free
130. security_prepare_creds
131. security_transfer_creds
132. security_cred_getsecid
133. security_kernel_act_as
134. security_kernel_create_files_as
135. security_kernel_module_request
136. security_kernel_read_file
137. security_kernel_post_read_file
138. security_kernel_load_data
139. security_task_fix_setuid
140. security_task_setpgid
141. security_task_getpgid
142. security_task_getsid
143. security_task_getsecid
144. security_task_setnice
145. security_task_setioprio
146. security_task_getioprio
147. security_task_prlimit
148. security_task_setrlimit
149. security_task_setscheduler
150. security_task_getscheduler
151. security_task_movememory
152. security_task_kill
153. security_task_prctl
154. security_task_to_inode
155. security_ipc_permission
156. security_ipc_getsecid
157. security_msg_msg_alloc
158. security_msg_msg_free
159. security_msg_queue_alloc
160. security_msg_queue_free
161. security_msg_queue_associate
162. security_msg_queue_msgctl
163. security_msg_queue_msgsnd
164. security_msg_queue_msgrcv
165. security_shm_alloc
166. security_shm_free
167. security_shm_associate
168. security_shm_shmctl
169. security_shm_shmat
170. security_sem_alloc
171. security_sem_free
172. security_sem_associate
173. security_sem_semctl
174. security_sem_semop
175. security_d_instantiate
176. security_getprocattr
177. security_setprocattr
178. security_netlink_send
179. security_ismaclabel
180. security_secid_to_secctx
181. security_secctx_to_secid
182. security_release_secctx
183. security_inode_invalidate_secctx
184. security_inode_notifysecctx
185. security_inode_setsecctx
186. security_inode_getsecctx
187. security_unix_stream_connect
188. security_unix_may_send
189. security_socket_create
190. security_socket_post_create
191. security_socket_socketpair
192. security_socket_bind
193. security_socket_connect
194. security_socket_listen
195. security_socket_accept
196. security_socket_sendmsg
197. security_socket_recvmsg
198. security_socket_getsockname
199. security_socket_getpeername
200. security_socket_getsockopt
201. security_socket_setsockopt
202. security_socket_shutdown
203. security_sock_rcv_skb
204. security_socket_getpeersec_stream
205. security_socket_getpeersec_dgram
206. security_sk_alloc
207. security_sk_free
208. security_sk_clone
209. security_sk_classify_flow
210. security_req_classify_flow
211. security_sock_graft
212. security_inet_conn_request
213. security_inet_csk_clone
214. security_inet_conn_established
215. security_secmark_relabel_packet
216. security_secmark_refcount_inc
217. security_secmark_refcount_dec
218. security_tun_dev_alloc_security
219. security_tun_dev_free_security
220. security_tun_dev_create
221. security_tun_dev_attach_queue
222. security_tun_dev_attach
223. security_tun_dev_open
224. security_sctp_assoc_request
225. security_sctp_bind_connect
226. security_sctp_sk_clone
227. security_ib_pkey_access
228. security_ib_endport_manage_subnet
229. security_ib_alloc_security
230. security_ib_free_security
231. security_xfrm_policy_alloc
232. security_xfrm_policy_clone
233. security_xfrm_policy_free
234. security_xfrm_policy_delete
235. security_xfrm_state_alloc
236. security_xfrm_state_alloc_acquire
237. security_xfrm_state_delete
238. security_xfrm_state_free
239. security_xfrm_policy_lookup
240. security_xfrm_state_pol_flow_match
241. security_xfrm_decode_session
242. security_skb_classify_flow
243. security_key_alloc
244. security_key_free
245. security_key_permission
246. security_key_getsecurity
247. security_audit_rule_init
248. security_audit_rule_known
249. security_audit_rule_free
250. security_audit_rule_match
251. security_bpf
252. security_bpf_map
253. security_bpf_prog
254. security_bpf_map_alloc
255. security_bpf_prog_alloc
256. security_bpf_map_free
257. security_bpf_prog_free
258. security_locked_down

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Security plug functions
   4  *
   5  * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
   6  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   7  * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
   8  * Copyright (C) 2016 Mellanox Technologies
   9  */
  10 
  11 #define pr_fmt(fmt) "LSM: " fmt
  12 
  13 #include <linux/bpf.h>
  14 #include <linux/capability.h>
  15 #include <linux/dcache.h>
  16 #include <linux/export.h>
  17 #include <linux/init.h>
  18 #include <linux/kernel.h>
  19 #include <linux/lsm_hooks.h>
  20 #include <linux/integrity.h>
  21 #include <linux/ima.h>
  22 #include <linux/evm.h>
  23 #include <linux/fsnotify.h>
  24 #include <linux/mman.h>
  25 #include <linux/mount.h>
  26 #include <linux/personality.h>
  27 #include <linux/backing-dev.h>
  28 #include <linux/string.h>
  29 #include <linux/msg.h>
  30 #include <net/flow.h>
  31 
  32 #define MAX_LSM_EVM_XATTR       2
  33 
  34 /* How many LSMs were built into the kernel? */
  35 #define LSM_COUNT (__end_lsm_info - __start_lsm_info)
  36 #define EARLY_LSM_COUNT (__end_early_lsm_info - __start_early_lsm_info)
  37 
  38 struct security_hook_heads security_hook_heads __lsm_ro_after_init;
  39 static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain);
  40 
  41 static struct kmem_cache *lsm_file_cache;
  42 static struct kmem_cache *lsm_inode_cache;
  43 
  44 char *lsm_names;
  45 static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init;
  46 
  47 /* Boot-time LSM user choice */
  48 static __initdata const char *chosen_lsm_order;
  49 static __initdata const char *chosen_major_lsm;
  50 
  51 static __initconst const char * const builtin_lsm_order = CONFIG_LSM;
  52 
  53 /* Ordered list of LSMs to initialize. */
  54 static __initdata struct lsm_info **ordered_lsms;
  55 static __initdata struct lsm_info *exclusive;
  56 
  57 static __initdata bool debug;
  58 #define init_debug(...)                                         \
  59         do {                                                    \
  60                 if (debug)                                      \
  61                         pr_info(__VA_ARGS__);                   \
  62         } while (0)
  63 
  64 static bool __init is_enabled(struct lsm_info *lsm)
  65 {
  66         if (!lsm->enabled)
  67                 return false;
  68 
  69         return *lsm->enabled;
  70 }
  71 
  72 /* Mark an LSM's enabled flag. */
  73 static int lsm_enabled_true __initdata = 1;
  74 static int lsm_enabled_false __initdata = 0;
  75 static void __init set_enabled(struct lsm_info *lsm, bool enabled)
  76 {
  77         /*
  78          * When an LSM hasn't configured an enable variable, we can use
  79          * a hard-coded location for storing the default enabled state.
  80          */
  81         if (!lsm->enabled) {
  82                 if (enabled)
  83                         lsm->enabled = &lsm_enabled_true;
  84                 else
  85                         lsm->enabled = &lsm_enabled_false;
  86         } else if (lsm->enabled == &lsm_enabled_true) {
  87                 if (!enabled)
  88                         lsm->enabled = &lsm_enabled_false;
  89         } else if (lsm->enabled == &lsm_enabled_false) {
  90                 if (enabled)
  91                         lsm->enabled = &lsm_enabled_true;
  92         } else {
  93                 *lsm->enabled = enabled;
  94         }
  95 }
  96 
  97 /* Is an LSM already listed in the ordered LSMs list? */
  98 static bool __init exists_ordered_lsm(struct lsm_info *lsm)
  99 {
 100         struct lsm_info **check;
 101 
 102         for (check = ordered_lsms; *check; check++)
 103                 if (*check == lsm)
 104                         return true;
 105 
 106         return false;
 107 }
 108 
 109 /* Append an LSM to the list of ordered LSMs to initialize. */
 110 static int last_lsm __initdata;
 111 static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from)
 112 {
 113         /* Ignore duplicate selections. */
 114         if (exists_ordered_lsm(lsm))
 115                 return;
 116 
 117         if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from))
 118                 return;
 119 
 120         /* Enable this LSM, if it is not already set. */
 121         if (!lsm->enabled)
 122                 lsm->enabled = &lsm_enabled_true;
 123         ordered_lsms[last_lsm++] = lsm;
 124 
 125         init_debug("%s ordering: %s (%sabled)\n", from, lsm->name,
 126                    is_enabled(lsm) ? "en" : "dis");
 127 }
 128 
 129 /* Is an LSM allowed to be initialized? */
 130 static bool __init lsm_allowed(struct lsm_info *lsm)
 131 {
 132         /* Skip if the LSM is disabled. */
 133         if (!is_enabled(lsm))
 134                 return false;
 135 
 136         /* Not allowed if another exclusive LSM already initialized. */
 137         if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) {
 138                 init_debug("exclusive disabled: %s\n", lsm->name);
 139                 return false;
 140         }
 141 
 142         return true;
 143 }
 144 
 145 static void __init lsm_set_blob_size(int *need, int *lbs)
 146 {
 147         int offset;
 148 
 149         if (*need > 0) {
 150                 offset = *lbs;
 151                 *lbs += *need;
 152                 *need = offset;
 153         }
 154 }
 155 
 156 static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed)
 157 {
 158         if (!needed)
 159                 return;
 160 
 161         lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred);
 162         lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file);
 163         /*
 164          * The inode blob gets an rcu_head in addition to
 165          * what the modules might need.
 166          */
 167         if (needed->lbs_inode && blob_sizes.lbs_inode == 0)
 168                 blob_sizes.lbs_inode = sizeof(struct rcu_head);
 169         lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode);
 170         lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc);
 171         lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg);
 172         lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task);
 173 }
 174 
 175 /* Prepare LSM for initialization. */
 176 static void __init prepare_lsm(struct lsm_info *lsm)
 177 {
 178         int enabled = lsm_allowed(lsm);
 179 
 180         /* Record enablement (to handle any following exclusive LSMs). */
 181         set_enabled(lsm, enabled);
 182 
 183         /* If enabled, do pre-initialization work. */
 184         if (enabled) {
 185                 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) {
 186                         exclusive = lsm;
 187                         init_debug("exclusive chosen: %s\n", lsm->name);
 188                 }
 189 
 190                 lsm_set_blob_sizes(lsm->blobs);
 191         }
 192 }
 193 
 194 /* Initialize a given LSM, if it is enabled. */
 195 static void __init initialize_lsm(struct lsm_info *lsm)
 196 {
 197         if (is_enabled(lsm)) {
 198                 int ret;
 199 
 200                 init_debug("initializing %s\n", lsm->name);
 201                 ret = lsm->init();
 202                 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret);
 203         }
 204 }
 205 
 206 /* Populate ordered LSMs list from comma-separated LSM name list. */
 207 static void __init ordered_lsm_parse(const char *order, const char *origin)
 208 {
 209         struct lsm_info *lsm;
 210         char *sep, *name, *next;
 211 
 212         /* LSM_ORDER_FIRST is always first. */
 213         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 214                 if (lsm->order == LSM_ORDER_FIRST)
 215                         append_ordered_lsm(lsm, "first");
 216         }
 217 
 218         /* Process "security=", if given. */
 219         if (chosen_major_lsm) {
 220                 struct lsm_info *major;
 221 
 222                 /*
 223                  * To match the original "security=" behavior, this
 224                  * explicitly does NOT fallback to another Legacy Major
 225                  * if the selected one was separately disabled: disable
 226                  * all non-matching Legacy Major LSMs.
 227                  */
 228                 for (major = __start_lsm_info; major < __end_lsm_info;
 229                      major++) {
 230                         if ((major->flags & LSM_FLAG_LEGACY_MAJOR) &&
 231                             strcmp(major->name, chosen_major_lsm) != 0) {
 232                                 set_enabled(major, false);
 233                                 init_debug("security=%s disabled: %s\n",
 234                                            chosen_major_lsm, major->name);
 235                         }
 236                 }
 237         }
 238 
 239         sep = kstrdup(order, GFP_KERNEL);
 240         next = sep;
 241         /* Walk the list, looking for matching LSMs. */
 242         while ((name = strsep(&next, ",")) != NULL) {
 243                 bool found = false;
 244 
 245                 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 246                         if (lsm->order == LSM_ORDER_MUTABLE &&
 247                             strcmp(lsm->name, name) == 0) {
 248                                 append_ordered_lsm(lsm, origin);
 249                                 found = true;
 250                         }
 251                 }
 252 
 253                 if (!found)
 254                         init_debug("%s ignored: %s\n", origin, name);
 255         }
 256 
 257         /* Process "security=", if given. */
 258         if (chosen_major_lsm) {
 259                 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 260                         if (exists_ordered_lsm(lsm))
 261                                 continue;
 262                         if (strcmp(lsm->name, chosen_major_lsm) == 0)
 263                                 append_ordered_lsm(lsm, "security=");
 264                 }
 265         }
 266 
 267         /* Disable all LSMs not in the ordered list. */
 268         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 269                 if (exists_ordered_lsm(lsm))
 270                         continue;
 271                 set_enabled(lsm, false);
 272                 init_debug("%s disabled: %s\n", origin, lsm->name);
 273         }
 274 
 275         kfree(sep);
 276 }
 277 
 278 static void __init lsm_early_cred(struct cred *cred);
 279 static void __init lsm_early_task(struct task_struct *task);
 280 
 281 static int lsm_append(const char *new, char **result);
 282 
 283 static void __init ordered_lsm_init(void)
 284 {
 285         struct lsm_info **lsm;
 286 
 287         ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms),
 288                                 GFP_KERNEL);
 289 
 290         if (chosen_lsm_order) {
 291                 if (chosen_major_lsm) {
 292                         pr_info("security= is ignored because it is superseded by lsm=\n");
 293                         chosen_major_lsm = NULL;
 294                 }
 295                 ordered_lsm_parse(chosen_lsm_order, "cmdline");
 296         } else
 297                 ordered_lsm_parse(builtin_lsm_order, "builtin");
 298 
 299         for (lsm = ordered_lsms; *lsm; lsm++)
 300                 prepare_lsm(*lsm);
 301 
 302         init_debug("cred blob size     = %d\n", blob_sizes.lbs_cred);
 303         init_debug("file blob size     = %d\n", blob_sizes.lbs_file);
 304         init_debug("inode blob size    = %d\n", blob_sizes.lbs_inode);
 305         init_debug("ipc blob size      = %d\n", blob_sizes.lbs_ipc);
 306         init_debug("msg_msg blob size  = %d\n", blob_sizes.lbs_msg_msg);
 307         init_debug("task blob size     = %d\n", blob_sizes.lbs_task);
 308 
 309         /*
 310          * Create any kmem_caches needed for blobs
 311          */
 312         if (blob_sizes.lbs_file)
 313                 lsm_file_cache = kmem_cache_create("lsm_file_cache",
 314                                                    blob_sizes.lbs_file, 0,
 315                                                    SLAB_PANIC, NULL);
 316         if (blob_sizes.lbs_inode)
 317                 lsm_inode_cache = kmem_cache_create("lsm_inode_cache",
 318                                                     blob_sizes.lbs_inode, 0,
 319                                                     SLAB_PANIC, NULL);
 320 
 321         lsm_early_cred((struct cred *) current->cred);
 322         lsm_early_task(current);
 323         for (lsm = ordered_lsms; *lsm; lsm++)
 324                 initialize_lsm(*lsm);
 325 
 326         kfree(ordered_lsms);
 327 }
 328 
 329 int __init early_security_init(void)
 330 {
 331         int i;
 332         struct hlist_head *list = (struct hlist_head *) &security_hook_heads;
 333         struct lsm_info *lsm;
 334 
 335         for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head);
 336              i++)
 337                 INIT_HLIST_HEAD(&list[i]);
 338 
 339         for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) {
 340                 if (!lsm->enabled)
 341                         lsm->enabled = &lsm_enabled_true;
 342                 prepare_lsm(lsm);
 343                 initialize_lsm(lsm);
 344         }
 345 
 346         return 0;
 347 }
 348 
 349 /**
 350  * security_init - initializes the security framework
 351  *
 352  * This should be called early in the kernel initialization sequence.
 353  */
 354 int __init security_init(void)
 355 {
 356         struct lsm_info *lsm;
 357 
 358         pr_info("Security Framework initializing\n");
 359 
 360         /*
 361          * Append the names of the early LSM modules now that kmalloc() is
 362          * available
 363          */
 364         for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) {
 365                 if (lsm->enabled)
 366                         lsm_append(lsm->name, &lsm_names);
 367         }
 368 
 369         /* Load LSMs in specified order. */
 370         ordered_lsm_init();
 371 
 372         return 0;
 373 }
 374 
 375 /* Save user chosen LSM */
 376 static int __init choose_major_lsm(char *str)
 377 {
 378         chosen_major_lsm = str;
 379         return 1;
 380 }
 381 __setup("security=", choose_major_lsm);
 382 
 383 /* Explicitly choose LSM initialization order. */
 384 static int __init choose_lsm_order(char *str)
 385 {
 386         chosen_lsm_order = str;
 387         return 1;
 388 }
 389 __setup("lsm=", choose_lsm_order);
 390 
 391 /* Enable LSM order debugging. */
 392 static int __init enable_debug(char *str)
 393 {
 394         debug = true;
 395         return 1;
 396 }
 397 __setup("lsm.debug", enable_debug);
 398 
 399 static bool match_last_lsm(const char *list, const char *lsm)
 400 {
 401         const char *last;
 402 
 403         if (WARN_ON(!list || !lsm))
 404                 return false;
 405         last = strrchr(list, ',');
 406         if (last)
 407                 /* Pass the comma, strcmp() will check for '\0' */
 408                 last++;
 409         else
 410                 last = list;
 411         return !strcmp(last, lsm);
 412 }
 413 
 414 static int lsm_append(const char *new, char **result)
 415 {
 416         char *cp;
 417 
 418         if (*result == NULL) {
 419                 *result = kstrdup(new, GFP_KERNEL);
 420                 if (*result == NULL)
 421                         return -ENOMEM;
 422         } else {
 423                 /* Check if it is the last registered name */
 424                 if (match_last_lsm(*result, new))
 425                         return 0;
 426                 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
 427                 if (cp == NULL)
 428                         return -ENOMEM;
 429                 kfree(*result);
 430                 *result = cp;
 431         }
 432         return 0;
 433 }
 434 
 435 /**
 436  * security_add_hooks - Add a modules hooks to the hook lists.
 437  * @hooks: the hooks to add
 438  * @count: the number of hooks to add
 439  * @lsm: the name of the security module
 440  *
 441  * Each LSM has to register its hooks with the infrastructure.
 442  */
 443 void __init security_add_hooks(struct security_hook_list *hooks, int count,
 444                                 char *lsm)
 445 {
 446         int i;
 447 
 448         for (i = 0; i < count; i++) {
 449                 hooks[i].lsm = lsm;
 450                 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
 451         }
 452 
 453         /*
 454          * Don't try to append during early_security_init(), we'll come back
 455          * and fix this up afterwards.
 456          */
 457         if (slab_is_available()) {
 458                 if (lsm_append(lsm, &lsm_names) < 0)
 459                         panic("%s - Cannot get early memory.\n", __func__);
 460         }
 461 }
 462 
 463 int call_blocking_lsm_notifier(enum lsm_event event, void *data)
 464 {
 465         return blocking_notifier_call_chain(&blocking_lsm_notifier_chain,
 466                                             event, data);
 467 }
 468 EXPORT_SYMBOL(call_blocking_lsm_notifier);
 469 
 470 int register_blocking_lsm_notifier(struct notifier_block *nb)
 471 {
 472         return blocking_notifier_chain_register(&blocking_lsm_notifier_chain,
 473                                                 nb);
 474 }
 475 EXPORT_SYMBOL(register_blocking_lsm_notifier);
 476 
 477 int unregister_blocking_lsm_notifier(struct notifier_block *nb)
 478 {
 479         return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain,
 480                                                   nb);
 481 }
 482 EXPORT_SYMBOL(unregister_blocking_lsm_notifier);
 483 
 484 /**
 485  * lsm_cred_alloc - allocate a composite cred blob
 486  * @cred: the cred that needs a blob
 487  * @gfp: allocation type
 488  *
 489  * Allocate the cred blob for all the modules
 490  *
 491  * Returns 0, or -ENOMEM if memory can't be allocated.
 492  */
 493 static int lsm_cred_alloc(struct cred *cred, gfp_t gfp)
 494 {
 495         if (blob_sizes.lbs_cred == 0) {
 496                 cred->security = NULL;
 497                 return 0;
 498         }
 499 
 500         cred->security = kzalloc(blob_sizes.lbs_cred, gfp);
 501         if (cred->security == NULL)
 502                 return -ENOMEM;
 503         return 0;
 504 }
 505 
 506 /**
 507  * lsm_early_cred - during initialization allocate a composite cred blob
 508  * @cred: the cred that needs a blob
 509  *
 510  * Allocate the cred blob for all the modules
 511  */
 512 static void __init lsm_early_cred(struct cred *cred)
 513 {
 514         int rc = lsm_cred_alloc(cred, GFP_KERNEL);
 515 
 516         if (rc)
 517                 panic("%s: Early cred alloc failed.\n", __func__);
 518 }
 519 
 520 /**
 521  * lsm_file_alloc - allocate a composite file blob
 522  * @file: the file that needs a blob
 523  *
 524  * Allocate the file blob for all the modules
 525  *
 526  * Returns 0, or -ENOMEM if memory can't be allocated.
 527  */
 528 static int lsm_file_alloc(struct file *file)
 529 {
 530         if (!lsm_file_cache) {
 531                 file->f_security = NULL;
 532                 return 0;
 533         }
 534 
 535         file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL);
 536         if (file->f_security == NULL)
 537                 return -ENOMEM;
 538         return 0;
 539 }
 540 
 541 /**
 542  * lsm_inode_alloc - allocate a composite inode blob
 543  * @inode: the inode that needs a blob
 544  *
 545  * Allocate the inode blob for all the modules
 546  *
 547  * Returns 0, or -ENOMEM if memory can't be allocated.
 548  */
 549 int lsm_inode_alloc(struct inode *inode)
 550 {
 551         if (!lsm_inode_cache) {
 552                 inode->i_security = NULL;
 553                 return 0;
 554         }
 555 
 556         inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_NOFS);
 557         if (inode->i_security == NULL)
 558                 return -ENOMEM;
 559         return 0;
 560 }
 561 
 562 /**
 563  * lsm_task_alloc - allocate a composite task blob
 564  * @task: the task that needs a blob
 565  *
 566  * Allocate the task blob for all the modules
 567  *
 568  * Returns 0, or -ENOMEM if memory can't be allocated.
 569  */
 570 static int lsm_task_alloc(struct task_struct *task)
 571 {
 572         if (blob_sizes.lbs_task == 0) {
 573                 task->security = NULL;
 574                 return 0;
 575         }
 576 
 577         task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL);
 578         if (task->security == NULL)
 579                 return -ENOMEM;
 580         return 0;
 581 }
 582 
 583 /**
 584  * lsm_ipc_alloc - allocate a composite ipc blob
 585  * @kip: the ipc that needs a blob
 586  *
 587  * Allocate the ipc blob for all the modules
 588  *
 589  * Returns 0, or -ENOMEM if memory can't be allocated.
 590  */
 591 static int lsm_ipc_alloc(struct kern_ipc_perm *kip)
 592 {
 593         if (blob_sizes.lbs_ipc == 0) {
 594                 kip->security = NULL;
 595                 return 0;
 596         }
 597 
 598         kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL);
 599         if (kip->security == NULL)
 600                 return -ENOMEM;
 601         return 0;
 602 }
 603 
 604 /**
 605  * lsm_msg_msg_alloc - allocate a composite msg_msg blob
 606  * @mp: the msg_msg that needs a blob
 607  *
 608  * Allocate the ipc blob for all the modules
 609  *
 610  * Returns 0, or -ENOMEM if memory can't be allocated.
 611  */
 612 static int lsm_msg_msg_alloc(struct msg_msg *mp)
 613 {
 614         if (blob_sizes.lbs_msg_msg == 0) {
 615                 mp->security = NULL;
 616                 return 0;
 617         }
 618 
 619         mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL);
 620         if (mp->security == NULL)
 621                 return -ENOMEM;
 622         return 0;
 623 }
 624 
 625 /**
 626  * lsm_early_task - during initialization allocate a composite task blob
 627  * @task: the task that needs a blob
 628  *
 629  * Allocate the task blob for all the modules
 630  */
 631 static void __init lsm_early_task(struct task_struct *task)
 632 {
 633         int rc = lsm_task_alloc(task);
 634 
 635         if (rc)
 636                 panic("%s: Early task alloc failed.\n", __func__);
 637 }
 638 
 639 /*
 640  * Hook list operation macros.
 641  *
 642  * call_void_hook:
 643  *      This is a hook that does not return a value.
 644  *
 645  * call_int_hook:
 646  *      This is a hook that returns a value.
 647  */
 648 
 649 #define call_void_hook(FUNC, ...)                               \
 650         do {                                                    \
 651                 struct security_hook_list *P;                   \
 652                                                                 \
 653                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
 654                         P->hook.FUNC(__VA_ARGS__);              \
 655         } while (0)
 656 
 657 #define call_int_hook(FUNC, IRC, ...) ({                        \
 658         int RC = IRC;                                           \
 659         do {                                                    \
 660                 struct security_hook_list *P;                   \
 661                                                                 \
 662                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
 663                         RC = P->hook.FUNC(__VA_ARGS__);         \
 664                         if (RC != 0)                            \
 665                                 break;                          \
 666                 }                                               \
 667         } while (0);                                            \
 668         RC;                                                     \
 669 })
 670 
 671 /* Security operations */
 672 
 673 int security_binder_set_context_mgr(struct task_struct *mgr)
 674 {
 675         return call_int_hook(binder_set_context_mgr, 0, mgr);
 676 }
 677 
 678 int security_binder_transaction(struct task_struct *from,
 679                                 struct task_struct *to)
 680 {
 681         return call_int_hook(binder_transaction, 0, from, to);
 682 }
 683 
 684 int security_binder_transfer_binder(struct task_struct *from,
 685                                     struct task_struct *to)
 686 {
 687         return call_int_hook(binder_transfer_binder, 0, from, to);
 688 }
 689 
 690 int security_binder_transfer_file(struct task_struct *from,
 691                                   struct task_struct *to, struct file *file)
 692 {
 693         return call_int_hook(binder_transfer_file, 0, from, to, file);
 694 }
 695 
 696 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
 697 {
 698         return call_int_hook(ptrace_access_check, 0, child, mode);
 699 }
 700 
 701 int security_ptrace_traceme(struct task_struct *parent)
 702 {
 703         return call_int_hook(ptrace_traceme, 0, parent);
 704 }
 705 
 706 int security_capget(struct task_struct *target,
 707                      kernel_cap_t *effective,
 708                      kernel_cap_t *inheritable,
 709                      kernel_cap_t *permitted)
 710 {
 711         return call_int_hook(capget, 0, target,
 712                                 effective, inheritable, permitted);
 713 }
 714 
 715 int security_capset(struct cred *new, const struct cred *old,
 716                     const kernel_cap_t *effective,
 717                     const kernel_cap_t *inheritable,
 718                     const kernel_cap_t *permitted)
 719 {
 720         return call_int_hook(capset, 0, new, old,
 721                                 effective, inheritable, permitted);
 722 }
 723 
 724 int security_capable(const struct cred *cred,
 725                      struct user_namespace *ns,
 726                      int cap,
 727                      unsigned int opts)
 728 {
 729         return call_int_hook(capable, 0, cred, ns, cap, opts);
 730 }
 731 
 732 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
 733 {
 734         return call_int_hook(quotactl, 0, cmds, type, id, sb);
 735 }
 736 
 737 int security_quota_on(struct dentry *dentry)
 738 {
 739         return call_int_hook(quota_on, 0, dentry);
 740 }
 741 
 742 int security_syslog(int type)
 743 {
 744         return call_int_hook(syslog, 0, type);
 745 }
 746 
 747 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
 748 {
 749         return call_int_hook(settime, 0, ts, tz);
 750 }
 751 
 752 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 753 {
 754         struct security_hook_list *hp;
 755         int cap_sys_admin = 1;
 756         int rc;
 757 
 758         /*
 759          * The module will respond with a positive value if
 760          * it thinks the __vm_enough_memory() call should be
 761          * made with the cap_sys_admin set. If all of the modules
 762          * agree that it should be set it will. If any module
 763          * thinks it should not be set it won't.
 764          */
 765         hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
 766                 rc = hp->hook.vm_enough_memory(mm, pages);
 767                 if (rc <= 0) {
 768                         cap_sys_admin = 0;
 769                         break;
 770                 }
 771         }
 772         return __vm_enough_memory(mm, pages, cap_sys_admin);
 773 }
 774 
 775 int security_bprm_set_creds(struct linux_binprm *bprm)
 776 {
 777         return call_int_hook(bprm_set_creds, 0, bprm);
 778 }
 779 
 780 int security_bprm_check(struct linux_binprm *bprm)
 781 {
 782         int ret;
 783 
 784         ret = call_int_hook(bprm_check_security, 0, bprm);
 785         if (ret)
 786                 return ret;
 787         return ima_bprm_check(bprm);
 788 }
 789 
 790 void security_bprm_committing_creds(struct linux_binprm *bprm)
 791 {
 792         call_void_hook(bprm_committing_creds, bprm);
 793 }
 794 
 795 void security_bprm_committed_creds(struct linux_binprm *bprm)
 796 {
 797         call_void_hook(bprm_committed_creds, bprm);
 798 }
 799 
 800 int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
 801 {
 802         return call_int_hook(fs_context_dup, 0, fc, src_fc);
 803 }
 804 
 805 int security_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param)
 806 {
 807         return call_int_hook(fs_context_parse_param, -ENOPARAM, fc, param);
 808 }
 809 
 810 int security_sb_alloc(struct super_block *sb)
 811 {
 812         return call_int_hook(sb_alloc_security, 0, sb);
 813 }
 814 
 815 void security_sb_free(struct super_block *sb)
 816 {
 817         call_void_hook(sb_free_security, sb);
 818 }
 819 
 820 void security_free_mnt_opts(void **mnt_opts)
 821 {
 822         if (!*mnt_opts)
 823                 return;
 824         call_void_hook(sb_free_mnt_opts, *mnt_opts);
 825         *mnt_opts = NULL;
 826 }
 827 EXPORT_SYMBOL(security_free_mnt_opts);
 828 
 829 int security_sb_eat_lsm_opts(char *options, void **mnt_opts)
 830 {
 831         return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts);
 832 }
 833 EXPORT_SYMBOL(security_sb_eat_lsm_opts);
 834 
 835 int security_sb_remount(struct super_block *sb,
 836                         void *mnt_opts)
 837 {
 838         return call_int_hook(sb_remount, 0, sb, mnt_opts);
 839 }
 840 EXPORT_SYMBOL(security_sb_remount);
 841 
 842 int security_sb_kern_mount(struct super_block *sb)
 843 {
 844         return call_int_hook(sb_kern_mount, 0, sb);
 845 }
 846 
 847 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
 848 {
 849         return call_int_hook(sb_show_options, 0, m, sb);
 850 }
 851 
 852 int security_sb_statfs(struct dentry *dentry)
 853 {
 854         return call_int_hook(sb_statfs, 0, dentry);
 855 }
 856 
 857 int security_sb_mount(const char *dev_name, const struct path *path,
 858                        const char *type, unsigned long flags, void *data)
 859 {
 860         return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
 861 }
 862 
 863 int security_sb_umount(struct vfsmount *mnt, int flags)
 864 {
 865         return call_int_hook(sb_umount, 0, mnt, flags);
 866 }
 867 
 868 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
 869 {
 870         return call_int_hook(sb_pivotroot, 0, old_path, new_path);
 871 }
 872 
 873 int security_sb_set_mnt_opts(struct super_block *sb,
 874                                 void *mnt_opts,
 875                                 unsigned long kern_flags,
 876                                 unsigned long *set_kern_flags)
 877 {
 878         return call_int_hook(sb_set_mnt_opts,
 879                                 mnt_opts ? -EOPNOTSUPP : 0, sb,
 880                                 mnt_opts, kern_flags, set_kern_flags);
 881 }
 882 EXPORT_SYMBOL(security_sb_set_mnt_opts);
 883 
 884 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 885                                 struct super_block *newsb,
 886                                 unsigned long kern_flags,
 887                                 unsigned long *set_kern_flags)
 888 {
 889         return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
 890                                 kern_flags, set_kern_flags);
 891 }
 892 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
 893 
 894 int security_add_mnt_opt(const char *option, const char *val, int len,
 895                          void **mnt_opts)
 896 {
 897         return call_int_hook(sb_add_mnt_opt, -EINVAL,
 898                                         option, val, len, mnt_opts);
 899 }
 900 EXPORT_SYMBOL(security_add_mnt_opt);
 901 
 902 int security_move_mount(const struct path *from_path, const struct path *to_path)
 903 {
 904         return call_int_hook(move_mount, 0, from_path, to_path);
 905 }
 906 
 907 int security_path_notify(const struct path *path, u64 mask,
 908                                 unsigned int obj_type)
 909 {
 910         return call_int_hook(path_notify, 0, path, mask, obj_type);
 911 }
 912 
 913 int security_inode_alloc(struct inode *inode)
 914 {
 915         int rc = lsm_inode_alloc(inode);
 916 
 917         if (unlikely(rc))
 918                 return rc;
 919         rc = call_int_hook(inode_alloc_security, 0, inode);
 920         if (unlikely(rc))
 921                 security_inode_free(inode);
 922         return rc;
 923 }
 924 
 925 static void inode_free_by_rcu(struct rcu_head *head)
 926 {
 927         /*
 928          * The rcu head is at the start of the inode blob
 929          */
 930         kmem_cache_free(lsm_inode_cache, head);
 931 }
 932 
 933 void security_inode_free(struct inode *inode)
 934 {
 935         integrity_inode_free(inode);
 936         call_void_hook(inode_free_security, inode);
 937         /*
 938          * The inode may still be referenced in a path walk and
 939          * a call to security_inode_permission() can be made
 940          * after inode_free_security() is called. Ideally, the VFS
 941          * wouldn't do this, but fixing that is a much harder
 942          * job. For now, simply free the i_security via RCU, and
 943          * leave the current inode->i_security pointer intact.
 944          * The inode will be freed after the RCU grace period too.
 945          */
 946         if (inode->i_security)
 947                 call_rcu((struct rcu_head *)inode->i_security,
 948                                 inode_free_by_rcu);
 949 }
 950 
 951 int security_dentry_init_security(struct dentry *dentry, int mode,
 952                                         const struct qstr *name, void **ctx,
 953                                         u32 *ctxlen)
 954 {
 955         return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
 956                                 name, ctx, ctxlen);
 957 }
 958 EXPORT_SYMBOL(security_dentry_init_security);
 959 
 960 int security_dentry_create_files_as(struct dentry *dentry, int mode,
 961                                     struct qstr *name,
 962                                     const struct cred *old, struct cred *new)
 963 {
 964         return call_int_hook(dentry_create_files_as, 0, dentry, mode,
 965                                 name, old, new);
 966 }
 967 EXPORT_SYMBOL(security_dentry_create_files_as);
 968 
 969 int security_inode_init_security(struct inode *inode, struct inode *dir,
 970                                  const struct qstr *qstr,
 971                                  const initxattrs initxattrs, void *fs_data)
 972 {
 973         struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
 974         struct xattr *lsm_xattr, *evm_xattr, *xattr;
 975         int ret;
 976 
 977         if (unlikely(IS_PRIVATE(inode)))
 978                 return 0;
 979 
 980         if (!initxattrs)
 981                 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
 982                                      dir, qstr, NULL, NULL, NULL);
 983         memset(new_xattrs, 0, sizeof(new_xattrs));
 984         lsm_xattr = new_xattrs;
 985         ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
 986                                                 &lsm_xattr->name,
 987                                                 &lsm_xattr->value,
 988                                                 &lsm_xattr->value_len);
 989         if (ret)
 990                 goto out;
 991 
 992         evm_xattr = lsm_xattr + 1;
 993         ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
 994         if (ret)
 995                 goto out;
 996         ret = initxattrs(inode, new_xattrs, fs_data);
 997 out:
 998         for (xattr = new_xattrs; xattr->value != NULL; xattr++)
 999                 kfree(xattr->value);
1000         return (ret == -EOPNOTSUPP) ? 0 : ret;
1001 }
1002 EXPORT_SYMBOL(security_inode_init_security);
1003 
1004 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
1005                                      const struct qstr *qstr, const char **name,
1006                                      void **value, size_t *len)
1007 {
1008         if (unlikely(IS_PRIVATE(inode)))
1009                 return -EOPNOTSUPP;
1010         return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
1011                              qstr, name, value, len);
1012 }
1013 EXPORT_SYMBOL(security_old_inode_init_security);
1014 
1015 #ifdef CONFIG_SECURITY_PATH
1016 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
1017                         unsigned int dev)
1018 {
1019         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1020                 return 0;
1021         return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
1022 }
1023 EXPORT_SYMBOL(security_path_mknod);
1024 
1025 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
1026 {
1027         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1028                 return 0;
1029         return call_int_hook(path_mkdir, 0, dir, dentry, mode);
1030 }
1031 EXPORT_SYMBOL(security_path_mkdir);
1032 
1033 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
1034 {
1035         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1036                 return 0;
1037         return call_int_hook(path_rmdir, 0, dir, dentry);
1038 }
1039 
1040 int security_path_unlink(const struct path *dir, struct dentry *dentry)
1041 {
1042         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1043                 return 0;
1044         return call_int_hook(path_unlink, 0, dir, dentry);
1045 }
1046 EXPORT_SYMBOL(security_path_unlink);
1047 
1048 int security_path_symlink(const struct path *dir, struct dentry *dentry,
1049                           const char *old_name)
1050 {
1051         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1052                 return 0;
1053         return call_int_hook(path_symlink, 0, dir, dentry, old_name);
1054 }
1055 
1056 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
1057                        struct dentry *new_dentry)
1058 {
1059         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1060                 return 0;
1061         return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
1062 }
1063 
1064 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
1065                          const struct path *new_dir, struct dentry *new_dentry,
1066                          unsigned int flags)
1067 {
1068         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1069                      (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1070                 return 0;
1071 
1072         if (flags & RENAME_EXCHANGE) {
1073                 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
1074                                         old_dir, old_dentry);
1075                 if (err)
1076                         return err;
1077         }
1078 
1079         return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
1080                                 new_dentry);
1081 }
1082 EXPORT_SYMBOL(security_path_rename);
1083 
1084 int security_path_truncate(const struct path *path)
1085 {
1086         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1087                 return 0;
1088         return call_int_hook(path_truncate, 0, path);
1089 }
1090 
1091 int security_path_chmod(const struct path *path, umode_t mode)
1092 {
1093         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1094                 return 0;
1095         return call_int_hook(path_chmod, 0, path, mode);
1096 }
1097 
1098 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
1099 {
1100         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1101                 return 0;
1102         return call_int_hook(path_chown, 0, path, uid, gid);
1103 }
1104 
1105 int security_path_chroot(const struct path *path)
1106 {
1107         return call_int_hook(path_chroot, 0, path);
1108 }
1109 #endif
1110 
1111 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
1112 {
1113         if (unlikely(IS_PRIVATE(dir)))
1114                 return 0;
1115         return call_int_hook(inode_create, 0, dir, dentry, mode);
1116 }
1117 EXPORT_SYMBOL_GPL(security_inode_create);
1118 
1119 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
1120                          struct dentry *new_dentry)
1121 {
1122         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1123                 return 0;
1124         return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
1125 }
1126 
1127 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
1128 {
1129         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1130                 return 0;
1131         return call_int_hook(inode_unlink, 0, dir, dentry);
1132 }
1133 
1134 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
1135                             const char *old_name)
1136 {
1137         if (unlikely(IS_PRIVATE(dir)))
1138                 return 0;
1139         return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
1140 }
1141 
1142 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1143 {
1144         if (unlikely(IS_PRIVATE(dir)))
1145                 return 0;
1146         return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
1147 }
1148 EXPORT_SYMBOL_GPL(security_inode_mkdir);
1149 
1150 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
1151 {
1152         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1153                 return 0;
1154         return call_int_hook(inode_rmdir, 0, dir, dentry);
1155 }
1156 
1157 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
1158 {
1159         if (unlikely(IS_PRIVATE(dir)))
1160                 return 0;
1161         return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
1162 }
1163 
1164 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
1165                            struct inode *new_dir, struct dentry *new_dentry,
1166                            unsigned int flags)
1167 {
1168         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1169             (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1170                 return 0;
1171 
1172         if (flags & RENAME_EXCHANGE) {
1173                 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
1174                                                      old_dir, old_dentry);
1175                 if (err)
1176                         return err;
1177         }
1178 
1179         return call_int_hook(inode_rename, 0, old_dir, old_dentry,
1180                                            new_dir, new_dentry);
1181 }
1182 
1183 int security_inode_readlink(struct dentry *dentry)
1184 {
1185         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1186                 return 0;
1187         return call_int_hook(inode_readlink, 0, dentry);
1188 }
1189 
1190 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
1191                                bool rcu)
1192 {
1193         if (unlikely(IS_PRIVATE(inode)))
1194                 return 0;
1195         return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
1196 }
1197 
1198 int security_inode_permission(struct inode *inode, int mask)
1199 {
1200         if (unlikely(IS_PRIVATE(inode)))
1201                 return 0;
1202         return call_int_hook(inode_permission, 0, inode, mask);
1203 }
1204 
1205 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
1206 {
1207         int ret;
1208 
1209         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1210                 return 0;
1211         ret = call_int_hook(inode_setattr, 0, dentry, attr);
1212         if (ret)
1213                 return ret;
1214         return evm_inode_setattr(dentry, attr);
1215 }
1216 EXPORT_SYMBOL_GPL(security_inode_setattr);
1217 
1218 int security_inode_getattr(const struct path *path)
1219 {
1220         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1221                 return 0;
1222         return call_int_hook(inode_getattr, 0, path);
1223 }
1224 
1225 int security_inode_setxattr(struct dentry *dentry, const char *name,
1226                             const void *value, size_t size, int flags)
1227 {
1228         int ret;
1229 
1230         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1231                 return 0;
1232         /*
1233          * SELinux and Smack integrate the cap call,
1234          * so assume that all LSMs supplying this call do so.
1235          */
1236         ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
1237                                 flags);
1238 
1239         if (ret == 1)
1240                 ret = cap_inode_setxattr(dentry, name, value, size, flags);
1241         if (ret)
1242                 return ret;
1243         ret = ima_inode_setxattr(dentry, name, value, size);
1244         if (ret)
1245                 return ret;
1246         return evm_inode_setxattr(dentry, name, value, size);
1247 }
1248 
1249 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
1250                                   const void *value, size_t size, int flags)
1251 {
1252         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1253                 return;
1254         call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
1255         evm_inode_post_setxattr(dentry, name, value, size);
1256 }
1257 
1258 int security_inode_getxattr(struct dentry *dentry, const char *name)
1259 {
1260         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1261                 return 0;
1262         return call_int_hook(inode_getxattr, 0, dentry, name);
1263 }
1264 
1265 int security_inode_listxattr(struct dentry *dentry)
1266 {
1267         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1268                 return 0;
1269         return call_int_hook(inode_listxattr, 0, dentry);
1270 }
1271 
1272 int security_inode_removexattr(struct dentry *dentry, const char *name)
1273 {
1274         int ret;
1275 
1276         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1277                 return 0;
1278         /*
1279          * SELinux and Smack integrate the cap call,
1280          * so assume that all LSMs supplying this call do so.
1281          */
1282         ret = call_int_hook(inode_removexattr, 1, dentry, name);
1283         if (ret == 1)
1284                 ret = cap_inode_removexattr(dentry, name);
1285         if (ret)
1286                 return ret;
1287         ret = ima_inode_removexattr(dentry, name);
1288         if (ret)
1289                 return ret;
1290         return evm_inode_removexattr(dentry, name);
1291 }
1292 
1293 int security_inode_need_killpriv(struct dentry *dentry)
1294 {
1295         return call_int_hook(inode_need_killpriv, 0, dentry);
1296 }
1297 
1298 int security_inode_killpriv(struct dentry *dentry)
1299 {
1300         return call_int_hook(inode_killpriv, 0, dentry);
1301 }
1302 
1303 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
1304 {
1305         struct security_hook_list *hp;
1306         int rc;
1307 
1308         if (unlikely(IS_PRIVATE(inode)))
1309                 return -EOPNOTSUPP;
1310         /*
1311          * Only one module will provide an attribute with a given name.
1312          */
1313         hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
1314                 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
1315                 if (rc != -EOPNOTSUPP)
1316                         return rc;
1317         }
1318         return -EOPNOTSUPP;
1319 }
1320 
1321 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
1322 {
1323         struct security_hook_list *hp;
1324         int rc;
1325 
1326         if (unlikely(IS_PRIVATE(inode)))
1327                 return -EOPNOTSUPP;
1328         /*
1329          * Only one module will provide an attribute with a given name.
1330          */
1331         hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
1332                 rc = hp->hook.inode_setsecurity(inode, name, value, size,
1333                                                                 flags);
1334                 if (rc != -EOPNOTSUPP)
1335                         return rc;
1336         }
1337         return -EOPNOTSUPP;
1338 }
1339 
1340 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
1341 {
1342         if (unlikely(IS_PRIVATE(inode)))
1343                 return 0;
1344         return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
1345 }
1346 EXPORT_SYMBOL(security_inode_listsecurity);
1347 
1348 void security_inode_getsecid(struct inode *inode, u32 *secid)
1349 {
1350         call_void_hook(inode_getsecid, inode, secid);
1351 }
1352 
1353 int security_inode_copy_up(struct dentry *src, struct cred **new)
1354 {
1355         return call_int_hook(inode_copy_up, 0, src, new);
1356 }
1357 EXPORT_SYMBOL(security_inode_copy_up);
1358 
1359 int security_inode_copy_up_xattr(const char *name)
1360 {
1361         return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
1362 }
1363 EXPORT_SYMBOL(security_inode_copy_up_xattr);
1364 
1365 int security_kernfs_init_security(struct kernfs_node *kn_dir,
1366                                   struct kernfs_node *kn)
1367 {
1368         return call_int_hook(kernfs_init_security, 0, kn_dir, kn);
1369 }
1370 
1371 int security_file_permission(struct file *file, int mask)
1372 {
1373         int ret;
1374 
1375         ret = call_int_hook(file_permission, 0, file, mask);
1376         if (ret)
1377                 return ret;
1378 
1379         return fsnotify_perm(file, mask);
1380 }
1381 
1382 int security_file_alloc(struct file *file)
1383 {
1384         int rc = lsm_file_alloc(file);
1385 
1386         if (rc)
1387                 return rc;
1388         rc = call_int_hook(file_alloc_security, 0, file);
1389         if (unlikely(rc))
1390                 security_file_free(file);
1391         return rc;
1392 }
1393 
1394 void security_file_free(struct file *file)
1395 {
1396         void *blob;
1397 
1398         call_void_hook(file_free_security, file);
1399 
1400         blob = file->f_security;
1401         if (blob) {
1402                 file->f_security = NULL;
1403                 kmem_cache_free(lsm_file_cache, blob);
1404         }
1405 }
1406 
1407 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1408 {
1409         return call_int_hook(file_ioctl, 0, file, cmd, arg);
1410 }
1411 
1412 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
1413 {
1414         /*
1415          * Does we have PROT_READ and does the application expect
1416          * it to imply PROT_EXEC?  If not, nothing to talk about...
1417          */
1418         if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
1419                 return prot;
1420         if (!(current->personality & READ_IMPLIES_EXEC))
1421                 return prot;
1422         /*
1423          * if that's an anonymous mapping, let it.
1424          */
1425         if (!file)
1426                 return prot | PROT_EXEC;
1427         /*
1428          * ditto if it's not on noexec mount, except that on !MMU we need
1429          * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1430          */
1431         if (!path_noexec(&file->f_path)) {
1432 #ifndef CONFIG_MMU
1433                 if (file->f_op->mmap_capabilities) {
1434                         unsigned caps = file->f_op->mmap_capabilities(file);
1435                         if (!(caps & NOMMU_MAP_EXEC))
1436                                 return prot;
1437                 }
1438 #endif
1439                 return prot | PROT_EXEC;
1440         }
1441         /* anything on noexec mount won't get PROT_EXEC */
1442         return prot;
1443 }
1444 
1445 int security_mmap_file(struct file *file, unsigned long prot,
1446                         unsigned long flags)
1447 {
1448         int ret;
1449         ret = call_int_hook(mmap_file, 0, file, prot,
1450                                         mmap_prot(file, prot), flags);
1451         if (ret)
1452                 return ret;
1453         return ima_file_mmap(file, prot);
1454 }
1455 
1456 int security_mmap_addr(unsigned long addr)
1457 {
1458         return call_int_hook(mmap_addr, 0, addr);
1459 }
1460 
1461 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
1462                             unsigned long prot)
1463 {
1464         return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
1465 }
1466 
1467 int security_file_lock(struct file *file, unsigned int cmd)
1468 {
1469         return call_int_hook(file_lock, 0, file, cmd);
1470 }
1471 
1472 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
1473 {
1474         return call_int_hook(file_fcntl, 0, file, cmd, arg);
1475 }
1476 
1477 void security_file_set_fowner(struct file *file)
1478 {
1479         call_void_hook(file_set_fowner, file);
1480 }
1481 
1482 int security_file_send_sigiotask(struct task_struct *tsk,
1483                                   struct fown_struct *fown, int sig)
1484 {
1485         return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
1486 }
1487 
1488 int security_file_receive(struct file *file)
1489 {
1490         return call_int_hook(file_receive, 0, file);
1491 }
1492 
1493 int security_file_open(struct file *file)
1494 {
1495         int ret;
1496 
1497         ret = call_int_hook(file_open, 0, file);
1498         if (ret)
1499                 return ret;
1500 
1501         return fsnotify_perm(file, MAY_OPEN);
1502 }
1503 
1504 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
1505 {
1506         int rc = lsm_task_alloc(task);
1507 
1508         if (rc)
1509                 return rc;
1510         rc = call_int_hook(task_alloc, 0, task, clone_flags);
1511         if (unlikely(rc))
1512                 security_task_free(task);
1513         return rc;
1514 }
1515 
1516 void security_task_free(struct task_struct *task)
1517 {
1518         call_void_hook(task_free, task);
1519 
1520         kfree(task->security);
1521         task->security = NULL;
1522 }
1523 
1524 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
1525 {
1526         int rc = lsm_cred_alloc(cred, gfp);
1527 
1528         if (rc)
1529                 return rc;
1530 
1531         rc = call_int_hook(cred_alloc_blank, 0, cred, gfp);
1532         if (unlikely(rc))
1533                 security_cred_free(cred);
1534         return rc;
1535 }
1536 
1537 void security_cred_free(struct cred *cred)
1538 {
1539         /*
1540          * There is a failure case in prepare_creds() that
1541          * may result in a call here with ->security being NULL.
1542          */
1543         if (unlikely(cred->security == NULL))
1544                 return;
1545 
1546         call_void_hook(cred_free, cred);
1547 
1548         kfree(cred->security);
1549         cred->security = NULL;
1550 }
1551 
1552 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1553 {
1554         int rc = lsm_cred_alloc(new, gfp);
1555 
1556         if (rc)
1557                 return rc;
1558 
1559         rc = call_int_hook(cred_prepare, 0, new, old, gfp);
1560         if (unlikely(rc))
1561                 security_cred_free(new);
1562         return rc;
1563 }
1564 
1565 void security_transfer_creds(struct cred *new, const struct cred *old)
1566 {
1567         call_void_hook(cred_transfer, new, old);
1568 }
1569 
1570 void security_cred_getsecid(const struct cred *c, u32 *secid)
1571 {
1572         *secid = 0;
1573         call_void_hook(cred_getsecid, c, secid);
1574 }
1575 EXPORT_SYMBOL(security_cred_getsecid);
1576 
1577 int security_kernel_act_as(struct cred *new, u32 secid)
1578 {
1579         return call_int_hook(kernel_act_as, 0, new, secid);
1580 }
1581 
1582 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1583 {
1584         return call_int_hook(kernel_create_files_as, 0, new, inode);
1585 }
1586 
1587 int security_kernel_module_request(char *kmod_name)
1588 {
1589         int ret;
1590 
1591         ret = call_int_hook(kernel_module_request, 0, kmod_name);
1592         if (ret)
1593                 return ret;
1594         return integrity_kernel_module_request(kmod_name);
1595 }
1596 
1597 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
1598 {
1599         int ret;
1600 
1601         ret = call_int_hook(kernel_read_file, 0, file, id);
1602         if (ret)
1603                 return ret;
1604         return ima_read_file(file, id);
1605 }
1606 EXPORT_SYMBOL_GPL(security_kernel_read_file);
1607 
1608 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1609                                    enum kernel_read_file_id id)
1610 {
1611         int ret;
1612 
1613         ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1614         if (ret)
1615                 return ret;
1616         return ima_post_read_file(file, buf, size, id);
1617 }
1618 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1619 
1620 int security_kernel_load_data(enum kernel_load_data_id id)
1621 {
1622         int ret;
1623 
1624         ret = call_int_hook(kernel_load_data, 0, id);
1625         if (ret)
1626                 return ret;
1627         return ima_load_data(id);
1628 }
1629 EXPORT_SYMBOL_GPL(security_kernel_load_data);
1630 
1631 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1632                              int flags)
1633 {
1634         return call_int_hook(task_fix_setuid, 0, new, old, flags);
1635 }
1636 
1637 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1638 {
1639         return call_int_hook(task_setpgid, 0, p, pgid);
1640 }
1641 
1642 int security_task_getpgid(struct task_struct *p)
1643 {
1644         return call_int_hook(task_getpgid, 0, p);
1645 }
1646 
1647 int security_task_getsid(struct task_struct *p)
1648 {
1649         return call_int_hook(task_getsid, 0, p);
1650 }
1651 
1652 void security_task_getsecid(struct task_struct *p, u32 *secid)
1653 {
1654         *secid = 0;
1655         call_void_hook(task_getsecid, p, secid);
1656 }
1657 EXPORT_SYMBOL(security_task_getsecid);
1658 
1659 int security_task_setnice(struct task_struct *p, int nice)
1660 {
1661         return call_int_hook(task_setnice, 0, p, nice);
1662 }
1663 
1664 int security_task_setioprio(struct task_struct *p, int ioprio)
1665 {
1666         return call_int_hook(task_setioprio, 0, p, ioprio);
1667 }
1668 
1669 int security_task_getioprio(struct task_struct *p)
1670 {
1671         return call_int_hook(task_getioprio, 0, p);
1672 }
1673 
1674 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1675                           unsigned int flags)
1676 {
1677         return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1678 }
1679 
1680 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1681                 struct rlimit *new_rlim)
1682 {
1683         return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1684 }
1685 
1686 int security_task_setscheduler(struct task_struct *p)
1687 {
1688         return call_int_hook(task_setscheduler, 0, p);
1689 }
1690 
1691 int security_task_getscheduler(struct task_struct *p)
1692 {
1693         return call_int_hook(task_getscheduler, 0, p);
1694 }
1695 
1696 int security_task_movememory(struct task_struct *p)
1697 {
1698         return call_int_hook(task_movememory, 0, p);
1699 }
1700 
1701 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info,
1702                         int sig, const struct cred *cred)
1703 {
1704         return call_int_hook(task_kill, 0, p, info, sig, cred);
1705 }
1706 
1707 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1708                          unsigned long arg4, unsigned long arg5)
1709 {
1710         int thisrc;
1711         int rc = -ENOSYS;
1712         struct security_hook_list *hp;
1713 
1714         hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1715                 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1716                 if (thisrc != -ENOSYS) {
1717                         rc = thisrc;
1718                         if (thisrc != 0)
1719                                 break;
1720                 }
1721         }
1722         return rc;
1723 }
1724 
1725 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1726 {
1727         call_void_hook(task_to_inode, p, inode);
1728 }
1729 
1730 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1731 {
1732         return call_int_hook(ipc_permission, 0, ipcp, flag);
1733 }
1734 
1735 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1736 {
1737         *secid = 0;
1738         call_void_hook(ipc_getsecid, ipcp, secid);
1739 }
1740 
1741 int security_msg_msg_alloc(struct msg_msg *msg)
1742 {
1743         int rc = lsm_msg_msg_alloc(msg);
1744 
1745         if (unlikely(rc))
1746                 return rc;
1747         rc = call_int_hook(msg_msg_alloc_security, 0, msg);
1748         if (unlikely(rc))
1749                 security_msg_msg_free(msg);
1750         return rc;
1751 }
1752 
1753 void security_msg_msg_free(struct msg_msg *msg)
1754 {
1755         call_void_hook(msg_msg_free_security, msg);
1756         kfree(msg->security);
1757         msg->security = NULL;
1758 }
1759 
1760 int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1761 {
1762         int rc = lsm_ipc_alloc(msq);
1763 
1764         if (unlikely(rc))
1765                 return rc;
1766         rc = call_int_hook(msg_queue_alloc_security, 0, msq);
1767         if (unlikely(rc))
1768                 security_msg_queue_free(msq);
1769         return rc;
1770 }
1771 
1772 void security_msg_queue_free(struct kern_ipc_perm *msq)
1773 {
1774         call_void_hook(msg_queue_free_security, msq);
1775         kfree(msq->security);
1776         msq->security = NULL;
1777 }
1778 
1779 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1780 {
1781         return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1782 }
1783 
1784 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1785 {
1786         return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1787 }
1788 
1789 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1790                                struct msg_msg *msg, int msqflg)
1791 {
1792         return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1793 }
1794 
1795 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1796                                struct task_struct *target, long type, int mode)
1797 {
1798         return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1799 }
1800 
1801 int security_shm_alloc(struct kern_ipc_perm *shp)
1802 {
1803         int rc = lsm_ipc_alloc(shp);
1804 
1805         if (unlikely(rc))
1806                 return rc;
1807         rc = call_int_hook(shm_alloc_security, 0, shp);
1808         if (unlikely(rc))
1809                 security_shm_free(shp);
1810         return rc;
1811 }
1812 
1813 void security_shm_free(struct kern_ipc_perm *shp)
1814 {
1815         call_void_hook(shm_free_security, shp);
1816         kfree(shp->security);
1817         shp->security = NULL;
1818 }
1819 
1820 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
1821 {
1822         return call_int_hook(shm_associate, 0, shp, shmflg);
1823 }
1824 
1825 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
1826 {
1827         return call_int_hook(shm_shmctl, 0, shp, cmd);
1828 }
1829 
1830 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
1831 {
1832         return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1833 }
1834 
1835 int security_sem_alloc(struct kern_ipc_perm *sma)
1836 {
1837         int rc = lsm_ipc_alloc(sma);
1838 
1839         if (unlikely(rc))
1840                 return rc;
1841         rc = call_int_hook(sem_alloc_security, 0, sma);
1842         if (unlikely(rc))
1843                 security_sem_free(sma);
1844         return rc;
1845 }
1846 
1847 void security_sem_free(struct kern_ipc_perm *sma)
1848 {
1849         call_void_hook(sem_free_security, sma);
1850         kfree(sma->security);
1851         sma->security = NULL;
1852 }
1853 
1854 int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
1855 {
1856         return call_int_hook(sem_associate, 0, sma, semflg);
1857 }
1858 
1859 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
1860 {
1861         return call_int_hook(sem_semctl, 0, sma, cmd);
1862 }
1863 
1864 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
1865                         unsigned nsops, int alter)
1866 {
1867         return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1868 }
1869 
1870 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1871 {
1872         if (unlikely(inode && IS_PRIVATE(inode)))
1873                 return;
1874         call_void_hook(d_instantiate, dentry, inode);
1875 }
1876 EXPORT_SYMBOL(security_d_instantiate);
1877 
1878 int security_getprocattr(struct task_struct *p, const char *lsm, char *name,
1879                                 char **value)
1880 {
1881         struct security_hook_list *hp;
1882 
1883         hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) {
1884                 if (lsm != NULL && strcmp(lsm, hp->lsm))
1885                         continue;
1886                 return hp->hook.getprocattr(p, name, value);
1887         }
1888         return -EINVAL;
1889 }
1890 
1891 int security_setprocattr(const char *lsm, const char *name, void *value,
1892                          size_t size)
1893 {
1894         struct security_hook_list *hp;
1895 
1896         hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) {
1897                 if (lsm != NULL && strcmp(lsm, hp->lsm))
1898                         continue;
1899                 return hp->hook.setprocattr(name, value, size);
1900         }
1901         return -EINVAL;
1902 }
1903 
1904 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1905 {
1906         return call_int_hook(netlink_send, 0, sk, skb);
1907 }
1908 
1909 int security_ismaclabel(const char *name)
1910 {
1911         return call_int_hook(ismaclabel, 0, name);
1912 }
1913 EXPORT_SYMBOL(security_ismaclabel);
1914 
1915 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1916 {
1917         return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1918                                 seclen);
1919 }
1920 EXPORT_SYMBOL(security_secid_to_secctx);
1921 
1922 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1923 {
1924         *secid = 0;
1925         return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1926 }
1927 EXPORT_SYMBOL(security_secctx_to_secid);
1928 
1929 void security_release_secctx(char *secdata, u32 seclen)
1930 {
1931         call_void_hook(release_secctx, secdata, seclen);
1932 }
1933 EXPORT_SYMBOL(security_release_secctx);
1934 
1935 void security_inode_invalidate_secctx(struct inode *inode)
1936 {
1937         call_void_hook(inode_invalidate_secctx, inode);
1938 }
1939 EXPORT_SYMBOL(security_inode_invalidate_secctx);
1940 
1941 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1942 {
1943         return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1944 }
1945 EXPORT_SYMBOL(security_inode_notifysecctx);
1946 
1947 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1948 {
1949         return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1950 }
1951 EXPORT_SYMBOL(security_inode_setsecctx);
1952 
1953 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1954 {
1955         return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1956 }
1957 EXPORT_SYMBOL(security_inode_getsecctx);
1958 
1959 #ifdef CONFIG_SECURITY_NETWORK
1960 
1961 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1962 {
1963         return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1964 }
1965 EXPORT_SYMBOL(security_unix_stream_connect);
1966 
1967 int security_unix_may_send(struct socket *sock,  struct socket *other)
1968 {
1969         return call_int_hook(unix_may_send, 0, sock, other);
1970 }
1971 EXPORT_SYMBOL(security_unix_may_send);
1972 
1973 int security_socket_create(int family, int type, int protocol, int kern)
1974 {
1975         return call_int_hook(socket_create, 0, family, type, protocol, kern);
1976 }
1977 
1978 int security_socket_post_create(struct socket *sock, int family,
1979                                 int type, int protocol, int kern)
1980 {
1981         return call_int_hook(socket_post_create, 0, sock, family, type,
1982                                                 protocol, kern);
1983 }
1984 
1985 int security_socket_socketpair(struct socket *socka, struct socket *sockb)
1986 {
1987         return call_int_hook(socket_socketpair, 0, socka, sockb);
1988 }
1989 EXPORT_SYMBOL(security_socket_socketpair);
1990 
1991 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1992 {
1993         return call_int_hook(socket_bind, 0, sock, address, addrlen);
1994 }
1995 
1996 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1997 {
1998         return call_int_hook(socket_connect, 0, sock, address, addrlen);
1999 }
2000 
2001 int security_socket_listen(struct socket *sock, int backlog)
2002 {
2003         return call_int_hook(socket_listen, 0, sock, backlog);
2004 }
2005 
2006 int security_socket_accept(struct socket *sock, struct socket *newsock)
2007 {
2008         return call_int_hook(socket_accept, 0, sock, newsock);
2009 }
2010 
2011 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
2012 {
2013         return call_int_hook(socket_sendmsg, 0, sock, msg, size);
2014 }
2015 
2016 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
2017                             int size, int flags)
2018 {
2019         return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
2020 }
2021 
2022 int security_socket_getsockname(struct socket *sock)
2023 {
2024         return call_int_hook(socket_getsockname, 0, sock);
2025 }
2026 
2027 int security_socket_getpeername(struct socket *sock)
2028 {
2029         return call_int_hook(socket_getpeername, 0, sock);
2030 }
2031 
2032 int security_socket_getsockopt(struct socket *sock, int level, int optname)
2033 {
2034         return call_int_hook(socket_getsockopt, 0, sock, level, optname);
2035 }
2036 
2037 int security_socket_setsockopt(struct socket *sock, int level, int optname)
2038 {
2039         return call_int_hook(socket_setsockopt, 0, sock, level, optname);
2040 }
2041 
2042 int security_socket_shutdown(struct socket *sock, int how)
2043 {
2044         return call_int_hook(socket_shutdown, 0, sock, how);
2045 }
2046 
2047 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
2048 {
2049         return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
2050 }
2051 EXPORT_SYMBOL(security_sock_rcv_skb);
2052 
2053 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
2054                                       int __user *optlen, unsigned len)
2055 {
2056         return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
2057                                 optval, optlen, len);
2058 }
2059 
2060 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
2061 {
2062         return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
2063                              skb, secid);
2064 }
2065 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
2066 
2067 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
2068 {
2069         return call_int_hook(sk_alloc_security, 0, sk, family, priority);
2070 }
2071 
2072 void security_sk_free(struct sock *sk)
2073 {
2074         call_void_hook(sk_free_security, sk);
2075 }
2076 
2077 void security_sk_clone(const struct sock *sk, struct sock *newsk)
2078 {
2079         call_void_hook(sk_clone_security, sk, newsk);
2080 }
2081 EXPORT_SYMBOL(security_sk_clone);
2082 
2083 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
2084 {
2085         call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
2086 }
2087 EXPORT_SYMBOL(security_sk_classify_flow);
2088 
2089 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
2090 {
2091         call_void_hook(req_classify_flow, req, fl);
2092 }
2093 EXPORT_SYMBOL(security_req_classify_flow);
2094 
2095 void security_sock_graft(struct sock *sk, struct socket *parent)
2096 {
2097         call_void_hook(sock_graft, sk, parent);
2098 }
2099 EXPORT_SYMBOL(security_sock_graft);
2100 
2101 int security_inet_conn_request(struct sock *sk,
2102                         struct sk_buff *skb, struct request_sock *req)
2103 {
2104         return call_int_hook(inet_conn_request, 0, sk, skb, req);
2105 }
2106 EXPORT_SYMBOL(security_inet_conn_request);
2107 
2108 void security_inet_csk_clone(struct sock *newsk,
2109                         const struct request_sock *req)
2110 {
2111         call_void_hook(inet_csk_clone, newsk, req);
2112 }
2113 
2114 void security_inet_conn_established(struct sock *sk,
2115                         struct sk_buff *skb)
2116 {
2117         call_void_hook(inet_conn_established, sk, skb);
2118 }
2119 EXPORT_SYMBOL(security_inet_conn_established);
2120 
2121 int security_secmark_relabel_packet(u32 secid)
2122 {
2123         return call_int_hook(secmark_relabel_packet, 0, secid);
2124 }
2125 EXPORT_SYMBOL(security_secmark_relabel_packet);
2126 
2127 void security_secmark_refcount_inc(void)
2128 {
2129         call_void_hook(secmark_refcount_inc);
2130 }
2131 EXPORT_SYMBOL(security_secmark_refcount_inc);
2132 
2133 void security_secmark_refcount_dec(void)
2134 {
2135         call_void_hook(secmark_refcount_dec);
2136 }
2137 EXPORT_SYMBOL(security_secmark_refcount_dec);
2138 
2139 int security_tun_dev_alloc_security(void **security)
2140 {
2141         return call_int_hook(tun_dev_alloc_security, 0, security);
2142 }
2143 EXPORT_SYMBOL(security_tun_dev_alloc_security);
2144 
2145 void security_tun_dev_free_security(void *security)
2146 {
2147         call_void_hook(tun_dev_free_security, security);
2148 }
2149 EXPORT_SYMBOL(security_tun_dev_free_security);
2150 
2151 int security_tun_dev_create(void)
2152 {
2153         return call_int_hook(tun_dev_create, 0);
2154 }
2155 EXPORT_SYMBOL(security_tun_dev_create);
2156 
2157 int security_tun_dev_attach_queue(void *security)
2158 {
2159         return call_int_hook(tun_dev_attach_queue, 0, security);
2160 }
2161 EXPORT_SYMBOL(security_tun_dev_attach_queue);
2162 
2163 int security_tun_dev_attach(struct sock *sk, void *security)
2164 {
2165         return call_int_hook(tun_dev_attach, 0, sk, security);
2166 }
2167 EXPORT_SYMBOL(security_tun_dev_attach);
2168 
2169 int security_tun_dev_open(void *security)
2170 {
2171         return call_int_hook(tun_dev_open, 0, security);
2172 }
2173 EXPORT_SYMBOL(security_tun_dev_open);
2174 
2175 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb)
2176 {
2177         return call_int_hook(sctp_assoc_request, 0, ep, skb);
2178 }
2179 EXPORT_SYMBOL(security_sctp_assoc_request);
2180 
2181 int security_sctp_bind_connect(struct sock *sk, int optname,
2182                                struct sockaddr *address, int addrlen)
2183 {
2184         return call_int_hook(sctp_bind_connect, 0, sk, optname,
2185                              address, addrlen);
2186 }
2187 EXPORT_SYMBOL(security_sctp_bind_connect);
2188 
2189 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
2190                             struct sock *newsk)
2191 {
2192         call_void_hook(sctp_sk_clone, ep, sk, newsk);
2193 }
2194 EXPORT_SYMBOL(security_sctp_sk_clone);
2195 
2196 #endif  /* CONFIG_SECURITY_NETWORK */
2197 
2198 #ifdef CONFIG_SECURITY_INFINIBAND
2199 
2200 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
2201 {
2202         return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
2203 }
2204 EXPORT_SYMBOL(security_ib_pkey_access);
2205 
2206 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
2207 {
2208         return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
2209 }
2210 EXPORT_SYMBOL(security_ib_endport_manage_subnet);
2211 
2212 int security_ib_alloc_security(void **sec)
2213 {
2214         return call_int_hook(ib_alloc_security, 0, sec);
2215 }
2216 EXPORT_SYMBOL(security_ib_alloc_security);
2217 
2218 void security_ib_free_security(void *sec)
2219 {
2220         call_void_hook(ib_free_security, sec);
2221 }
2222 EXPORT_SYMBOL(security_ib_free_security);
2223 #endif  /* CONFIG_SECURITY_INFINIBAND */
2224 
2225 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2226 
2227 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
2228                                struct xfrm_user_sec_ctx *sec_ctx,
2229                                gfp_t gfp)
2230 {
2231         return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
2232 }
2233 EXPORT_SYMBOL(security_xfrm_policy_alloc);
2234 
2235 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
2236                               struct xfrm_sec_ctx **new_ctxp)
2237 {
2238         return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
2239 }
2240 
2241 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
2242 {
2243         call_void_hook(xfrm_policy_free_security, ctx);
2244 }
2245 EXPORT_SYMBOL(security_xfrm_policy_free);
2246 
2247 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
2248 {
2249         return call_int_hook(xfrm_policy_delete_security, 0, ctx);
2250 }
2251 
2252 int security_xfrm_state_alloc(struct xfrm_state *x,
2253                               struct xfrm_user_sec_ctx *sec_ctx)
2254 {
2255         return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
2256 }
2257 EXPORT_SYMBOL(security_xfrm_state_alloc);
2258 
2259 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
2260                                       struct xfrm_sec_ctx *polsec, u32 secid)
2261 {
2262         return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
2263 }
2264 
2265 int security_xfrm_state_delete(struct xfrm_state *x)
2266 {
2267         return call_int_hook(xfrm_state_delete_security, 0, x);
2268 }
2269 EXPORT_SYMBOL(security_xfrm_state_delete);
2270 
2271 void security_xfrm_state_free(struct xfrm_state *x)
2272 {
2273         call_void_hook(xfrm_state_free_security, x);
2274 }
2275 
2276 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
2277 {
2278         return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
2279 }
2280 
2281 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2282                                        struct xfrm_policy *xp,
2283                                        const struct flowi *fl)
2284 {
2285         struct security_hook_list *hp;
2286         int rc = 1;
2287 
2288         /*
2289          * Since this function is expected to return 0 or 1, the judgment
2290          * becomes difficult if multiple LSMs supply this call. Fortunately,
2291          * we can use the first LSM's judgment because currently only SELinux
2292          * supplies this call.
2293          *
2294          * For speed optimization, we explicitly break the loop rather than
2295          * using the macro
2296          */
2297         hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
2298                                 list) {
2299                 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
2300                 break;
2301         }
2302         return rc;
2303 }
2304 
2305 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
2306 {
2307         return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
2308 }
2309 
2310 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
2311 {
2312         int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
2313                                 0);
2314 
2315         BUG_ON(rc);
2316 }
2317 EXPORT_SYMBOL(security_skb_classify_flow);
2318 
2319 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
2320 
2321 #ifdef CONFIG_KEYS
2322 
2323 int security_key_alloc(struct key *key, const struct cred *cred,
2324                        unsigned long flags)
2325 {
2326         return call_int_hook(key_alloc, 0, key, cred, flags);
2327 }
2328 
2329 void security_key_free(struct key *key)
2330 {
2331         call_void_hook(key_free, key);
2332 }
2333 
2334 int security_key_permission(key_ref_t key_ref,
2335                             const struct cred *cred, unsigned perm)
2336 {
2337         return call_int_hook(key_permission, 0, key_ref, cred, perm);
2338 }
2339 
2340 int security_key_getsecurity(struct key *key, char **_buffer)
2341 {
2342         *_buffer = NULL;
2343         return call_int_hook(key_getsecurity, 0, key, _buffer);
2344 }
2345 
2346 #endif  /* CONFIG_KEYS */
2347 
2348 #ifdef CONFIG_AUDIT
2349 
2350 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
2351 {
2352         return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
2353 }
2354 
2355 int security_audit_rule_known(struct audit_krule *krule)
2356 {
2357         return call_int_hook(audit_rule_known, 0, krule);
2358 }
2359 
2360 void security_audit_rule_free(void *lsmrule)
2361 {
2362         call_void_hook(audit_rule_free, lsmrule);
2363 }
2364 
2365 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
2366 {
2367         return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule);
2368 }
2369 #endif /* CONFIG_AUDIT */
2370 
2371 #ifdef CONFIG_BPF_SYSCALL
2372 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
2373 {
2374         return call_int_hook(bpf, 0, cmd, attr, size);
2375 }
2376 int security_bpf_map(struct bpf_map *map, fmode_t fmode)
2377 {
2378         return call_int_hook(bpf_map, 0, map, fmode);
2379 }
2380 int security_bpf_prog(struct bpf_prog *prog)
2381 {
2382         return call_int_hook(bpf_prog, 0, prog);
2383 }
2384 int security_bpf_map_alloc(struct bpf_map *map)
2385 {
2386         return call_int_hook(bpf_map_alloc_security, 0, map);
2387 }
2388 int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
2389 {
2390         return call_int_hook(bpf_prog_alloc_security, 0, aux);
2391 }
2392 void security_bpf_map_free(struct bpf_map *map)
2393 {
2394         call_void_hook(bpf_map_free_security, map);
2395 }
2396 void security_bpf_prog_free(struct bpf_prog_aux *aux)
2397 {
2398         call_void_hook(bpf_prog_free_security, aux);
2399 }
2400 #endif /* CONFIG_BPF_SYSCALL */
2401 
2402 int security_locked_down(enum lockdown_reason what)
2403 {
2404         return call_int_hook(locked_down, 0, what);
2405 }
2406 EXPORT_SYMBOL(security_locked_down);