Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 1 | /* |
| 2 | * security/tomoyo/domain.c |
| 3 | * |
Tetsuo Handa | c3ef150 | 2010-05-17 10:12:46 +0900 | [diff] [blame] | 4 | * Domain transition functions for TOMOYO. |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 5 | * |
Tetsuo Handa | c3ef150 | 2010-05-17 10:12:46 +0900 | [diff] [blame] | 6 | * Copyright (C) 2005-2010 NTT DATA CORPORATION |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include "common.h" |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 10 | #include <linux/binfmts.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 11 | #include <linux/slab.h> |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 12 | |
| 13 | /* Variables definitions.*/ |
| 14 | |
| 15 | /* The initial domain. */ |
| 16 | struct tomoyo_domain_info tomoyo_kernel_domain; |
| 17 | |
Tetsuo Handa | 237ab45 | 2010-06-12 20:46:22 +0900 | [diff] [blame] | 18 | /** |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 19 | * tomoyo_update_policy - Update an entry for exception policy. |
| 20 | * |
| 21 | * @new_entry: Pointer to "struct tomoyo_acl_info". |
| 22 | * @size: Size of @new_entry in bytes. |
| 23 | * @is_delete: True if it is a delete request. |
| 24 | * @list: Pointer to "struct list_head". |
| 25 | * @check_duplicate: Callback function to find duplicated entry. |
| 26 | * |
| 27 | * Returns 0 on success, negative value otherwise. |
| 28 | * |
| 29 | * Caller holds tomoyo_read_lock(). |
| 30 | */ |
| 31 | int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size, |
| 32 | bool is_delete, struct list_head *list, |
| 33 | bool (*check_duplicate) (const struct tomoyo_acl_head |
| 34 | *, |
| 35 | const struct tomoyo_acl_head |
| 36 | *)) |
| 37 | { |
| 38 | int error = is_delete ? -ENOENT : -ENOMEM; |
| 39 | struct tomoyo_acl_head *entry; |
| 40 | |
| 41 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
| 42 | return -ENOMEM; |
| 43 | list_for_each_entry_rcu(entry, list, list) { |
| 44 | if (!check_duplicate(entry, new_entry)) |
| 45 | continue; |
| 46 | entry->is_deleted = is_delete; |
| 47 | error = 0; |
| 48 | break; |
| 49 | } |
| 50 | if (error && !is_delete) { |
| 51 | entry = tomoyo_commit_ok(new_entry, size); |
| 52 | if (entry) { |
| 53 | list_add_tail_rcu(&entry->list, list); |
| 54 | error = 0; |
| 55 | } |
| 56 | } |
| 57 | mutex_unlock(&tomoyo_policy_lock); |
| 58 | return error; |
| 59 | } |
| 60 | |
| 61 | /** |
Tetsuo Handa | 237ab45 | 2010-06-12 20:46:22 +0900 | [diff] [blame] | 62 | * tomoyo_update_domain - Update an entry for domain policy. |
| 63 | * |
| 64 | * @new_entry: Pointer to "struct tomoyo_acl_info". |
| 65 | * @size: Size of @new_entry in bytes. |
| 66 | * @is_delete: True if it is a delete request. |
| 67 | * @domain: Pointer to "struct tomoyo_domain_info". |
| 68 | * @check_duplicate: Callback function to find duplicated entry. |
| 69 | * @merge_duplicate: Callback function to merge duplicated entry. |
| 70 | * |
| 71 | * Returns 0 on success, negative value otherwise. |
| 72 | * |
| 73 | * Caller holds tomoyo_read_lock(). |
| 74 | */ |
| 75 | int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size, |
| 76 | bool is_delete, struct tomoyo_domain_info *domain, |
| 77 | bool (*check_duplicate) (const struct tomoyo_acl_info |
| 78 | *, |
| 79 | const struct tomoyo_acl_info |
| 80 | *), |
| 81 | bool (*merge_duplicate) (struct tomoyo_acl_info *, |
| 82 | struct tomoyo_acl_info *, |
| 83 | const bool)) |
| 84 | { |
| 85 | int error = is_delete ? -ENOENT : -ENOMEM; |
| 86 | struct tomoyo_acl_info *entry; |
| 87 | |
| 88 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
| 89 | return error; |
| 90 | list_for_each_entry_rcu(entry, &domain->acl_info_list, list) { |
| 91 | if (!check_duplicate(entry, new_entry)) |
| 92 | continue; |
| 93 | if (merge_duplicate) |
| 94 | entry->is_deleted = merge_duplicate(entry, new_entry, |
| 95 | is_delete); |
| 96 | else |
| 97 | entry->is_deleted = is_delete; |
| 98 | error = 0; |
| 99 | break; |
| 100 | } |
| 101 | if (error && !is_delete) { |
| 102 | entry = tomoyo_commit_ok(new_entry, size); |
| 103 | if (entry) { |
| 104 | list_add_tail_rcu(&entry->list, &domain->acl_info_list); |
| 105 | error = 0; |
| 106 | } |
| 107 | } |
| 108 | mutex_unlock(&tomoyo_policy_lock); |
| 109 | return error; |
| 110 | } |
| 111 | |
Tetsuo Handa | 99a8525 | 2010-06-16 16:22:51 +0900 | [diff] [blame] | 112 | void tomoyo_check_acl(struct tomoyo_request_info *r, |
| 113 | bool (*check_entry) (const struct tomoyo_request_info *, |
| 114 | const struct tomoyo_acl_info *)) |
| 115 | { |
| 116 | const struct tomoyo_domain_info *domain = r->domain; |
| 117 | struct tomoyo_acl_info *ptr; |
| 118 | |
| 119 | list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
| 120 | if (ptr->is_deleted || ptr->type != r->param_type) |
| 121 | continue; |
| 122 | if (check_entry(r, ptr)) { |
| 123 | r->granted = true; |
| 124 | return; |
| 125 | } |
| 126 | } |
| 127 | r->granted = false; |
| 128 | } |
| 129 | |
Tetsuo Handa | c3fa109 | 2009-06-08 12:37:39 +0900 | [diff] [blame] | 130 | /* |
| 131 | * tomoyo_domain_list is used for holding list of domains. |
| 132 | * The ->acl_info_list of "struct tomoyo_domain_info" is used for holding |
| 133 | * permissions (e.g. "allow_read /lib/libc-2.5.so") given to each domain. |
| 134 | * |
| 135 | * An entry is added by |
| 136 | * |
| 137 | * # ( echo "<kernel>"; echo "allow_execute /sbin/init" ) > \ |
| 138 | * /sys/kernel/security/tomoyo/domain_policy |
| 139 | * |
| 140 | * and is deleted by |
| 141 | * |
| 142 | * # ( echo "<kernel>"; echo "delete allow_execute /sbin/init" ) > \ |
| 143 | * /sys/kernel/security/tomoyo/domain_policy |
| 144 | * |
| 145 | * and all entries are retrieved by |
| 146 | * |
| 147 | * # cat /sys/kernel/security/tomoyo/domain_policy |
| 148 | * |
| 149 | * A domain is added by |
| 150 | * |
| 151 | * # echo "<kernel>" > /sys/kernel/security/tomoyo/domain_policy |
| 152 | * |
| 153 | * and is deleted by |
| 154 | * |
| 155 | * # echo "delete <kernel>" > /sys/kernel/security/tomoyo/domain_policy |
| 156 | * |
| 157 | * and all domains are retrieved by |
| 158 | * |
| 159 | * # grep '^<kernel>' /sys/kernel/security/tomoyo/domain_policy |
| 160 | * |
| 161 | * Normally, a domainname is monotonically getting longer because a domainname |
| 162 | * which the process will belong to if an execve() operation succeeds is |
| 163 | * defined as a concatenation of "current domainname" + "pathname passed to |
| 164 | * execve()". |
| 165 | * See tomoyo_domain_initializer_list and tomoyo_domain_keeper_list for |
| 166 | * exceptions. |
| 167 | */ |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 168 | LIST_HEAD(tomoyo_domain_list); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 169 | |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 170 | /** |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 171 | * tomoyo_get_last_name - Get last component of a domainname. |
| 172 | * |
| 173 | * @domain: Pointer to "struct tomoyo_domain_info". |
| 174 | * |
| 175 | * Returns the last component of the domainname. |
| 176 | */ |
| 177 | const char *tomoyo_get_last_name(const struct tomoyo_domain_info *domain) |
| 178 | { |
| 179 | const char *cp0 = domain->domainname->name; |
| 180 | const char *cp1 = strrchr(cp0, ' '); |
| 181 | |
| 182 | if (cp1) |
| 183 | return cp1 + 1; |
| 184 | return cp0; |
| 185 | } |
| 186 | |
Tetsuo Handa | c3fa109 | 2009-06-08 12:37:39 +0900 | [diff] [blame] | 187 | /* |
| 188 | * tomoyo_domain_initializer_list is used for holding list of programs which |
| 189 | * triggers reinitialization of domainname. Normally, a domainname is |
| 190 | * monotonically getting longer. But sometimes, we restart daemon programs. |
| 191 | * It would be convenient for us that "a daemon started upon system boot" and |
| 192 | * "the daemon restarted from console" belong to the same domain. Thus, TOMOYO |
| 193 | * provides a way to shorten domainnames. |
| 194 | * |
| 195 | * An entry is added by |
| 196 | * |
| 197 | * # echo 'initialize_domain /usr/sbin/httpd' > \ |
| 198 | * /sys/kernel/security/tomoyo/exception_policy |
| 199 | * |
| 200 | * and is deleted by |
| 201 | * |
| 202 | * # echo 'delete initialize_domain /usr/sbin/httpd' > \ |
| 203 | * /sys/kernel/security/tomoyo/exception_policy |
| 204 | * |
| 205 | * and all entries are retrieved by |
| 206 | * |
| 207 | * # grep ^initialize_domain /sys/kernel/security/tomoyo/exception_policy |
| 208 | * |
| 209 | * In the example above, /usr/sbin/httpd will belong to |
| 210 | * "<kernel> /usr/sbin/httpd" domain. |
| 211 | * |
| 212 | * You may specify a domainname using "from" keyword. |
| 213 | * "initialize_domain /usr/sbin/httpd from <kernel> /etc/rc.d/init.d/httpd" |
| 214 | * will cause "/usr/sbin/httpd" executed from "<kernel> /etc/rc.d/init.d/httpd" |
| 215 | * domain to belong to "<kernel> /usr/sbin/httpd" domain. |
| 216 | * |
| 217 | * You may add "no_" prefix to "initialize_domain". |
| 218 | * "initialize_domain /usr/sbin/httpd" and |
| 219 | * "no_initialize_domain /usr/sbin/httpd from <kernel> /etc/rc.d/init.d/httpd" |
| 220 | * will cause "/usr/sbin/httpd" to belong to "<kernel> /usr/sbin/httpd" domain |
| 221 | * unless executed from "<kernel> /etc/rc.d/init.d/httpd" domain. |
| 222 | */ |
Tetsuo Handa | 847b173 | 2010-02-11 09:43:54 +0900 | [diff] [blame] | 223 | LIST_HEAD(tomoyo_domain_initializer_list); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 224 | |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 225 | static bool tomoyo_same_domain_initializer_entry(const struct tomoyo_acl_head * |
| 226 | a, |
| 227 | const struct tomoyo_acl_head * |
| 228 | b) |
| 229 | { |
| 230 | const struct tomoyo_domain_initializer_entry *p1 = |
| 231 | container_of(a, typeof(*p1), head); |
| 232 | const struct tomoyo_domain_initializer_entry *p2 = |
| 233 | container_of(b, typeof(*p2), head); |
| 234 | return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name |
| 235 | && p1->domainname == p2->domainname |
| 236 | && p1->program == p2->program; |
| 237 | } |
| 238 | |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 239 | /** |
| 240 | * tomoyo_update_domain_initializer_entry - Update "struct tomoyo_domain_initializer_entry" list. |
| 241 | * |
| 242 | * @domainname: The name of domain. May be NULL. |
| 243 | * @program: The name of program. |
| 244 | * @is_not: True if it is "no_initialize_domain" entry. |
| 245 | * @is_delete: True if it is a delete request. |
| 246 | * |
| 247 | * Returns 0 on success, negative value otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 248 | * |
| 249 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 250 | */ |
| 251 | static int tomoyo_update_domain_initializer_entry(const char *domainname, |
| 252 | const char *program, |
| 253 | const bool is_not, |
| 254 | const bool is_delete) |
| 255 | { |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 256 | struct tomoyo_domain_initializer_entry e = { .is_not = is_not }; |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 257 | int error = is_delete ? -ENOENT : -ENOMEM; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 258 | |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 259 | if (!tomoyo_correct_path(program)) |
Tetsuo Handa | 3f62963 | 2010-06-03 20:37:26 +0900 | [diff] [blame] | 260 | return -EINVAL; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 261 | if (domainname) { |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 262 | if (!tomoyo_domain_def(domainname) && |
| 263 | tomoyo_correct_path(domainname)) |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 264 | e.is_last_name = true; |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 265 | else if (!tomoyo_correct_domain(domainname)) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 266 | return -EINVAL; |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 267 | e.domainname = tomoyo_get_name(domainname); |
| 268 | if (!e.domainname) |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 269 | goto out; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 270 | } |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 271 | e.program = tomoyo_get_name(program); |
| 272 | if (!e.program) |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 273 | goto out; |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 274 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
| 275 | &tomoyo_domain_initializer_list, |
| 276 | tomoyo_same_domain_initializer_entry); |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 277 | out: |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 278 | tomoyo_put_name(e.domainname); |
| 279 | tomoyo_put_name(e.program); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 280 | return error; |
| 281 | } |
| 282 | |
| 283 | /** |
| 284 | * tomoyo_read_domain_initializer_policy - Read "struct tomoyo_domain_initializer_entry" list. |
| 285 | * |
| 286 | * @head: Pointer to "struct tomoyo_io_buffer". |
| 287 | * |
| 288 | * Returns true on success, false otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 289 | * |
| 290 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 291 | */ |
| 292 | bool tomoyo_read_domain_initializer_policy(struct tomoyo_io_buffer *head) |
| 293 | { |
| 294 | struct list_head *pos; |
| 295 | bool done = true; |
| 296 | |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 297 | list_for_each_cookie(pos, head->read_var2, |
| 298 | &tomoyo_domain_initializer_list) { |
| 299 | const char *no; |
| 300 | const char *from = ""; |
| 301 | const char *domain = ""; |
| 302 | struct tomoyo_domain_initializer_entry *ptr; |
| 303 | ptr = list_entry(pos, struct tomoyo_domain_initializer_entry, |
Tetsuo Handa | 82e0f00 | 2010-06-15 09:22:42 +0900 | [diff] [blame] | 304 | head.list); |
| 305 | if (ptr->head.is_deleted) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 306 | continue; |
| 307 | no = ptr->is_not ? "no_" : ""; |
| 308 | if (ptr->domainname) { |
| 309 | from = " from "; |
| 310 | domain = ptr->domainname->name; |
| 311 | } |
Tetsuo Handa | 7d2948b | 2009-06-02 20:42:24 +0900 | [diff] [blame] | 312 | done = tomoyo_io_printf(head, |
| 313 | "%s" TOMOYO_KEYWORD_INITIALIZE_DOMAIN |
| 314 | "%s%s%s\n", no, ptr->program->name, |
| 315 | from, domain); |
| 316 | if (!done) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 317 | break; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 318 | } |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 319 | return done; |
| 320 | } |
| 321 | |
| 322 | /** |
| 323 | * tomoyo_write_domain_initializer_policy - Write "struct tomoyo_domain_initializer_entry" list. |
| 324 | * |
| 325 | * @data: String to parse. |
| 326 | * @is_not: True if it is "no_initialize_domain" entry. |
| 327 | * @is_delete: True if it is a delete request. |
| 328 | * |
| 329 | * Returns 0 on success, negative value otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 330 | * |
| 331 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 332 | */ |
| 333 | int tomoyo_write_domain_initializer_policy(char *data, const bool is_not, |
| 334 | const bool is_delete) |
| 335 | { |
| 336 | char *cp = strstr(data, " from "); |
| 337 | |
| 338 | if (cp) { |
| 339 | *cp = '\0'; |
| 340 | return tomoyo_update_domain_initializer_entry(cp + 6, data, |
| 341 | is_not, |
| 342 | is_delete); |
| 343 | } |
| 344 | return tomoyo_update_domain_initializer_entry(NULL, data, is_not, |
| 345 | is_delete); |
| 346 | } |
| 347 | |
| 348 | /** |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 349 | * tomoyo_domain_initializer - Check whether the given program causes domainname reinitialization. |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 350 | * |
| 351 | * @domainname: The name of domain. |
| 352 | * @program: The name of program. |
| 353 | * @last_name: The last component of @domainname. |
| 354 | * |
| 355 | * Returns true if executing @program reinitializes domain transition, |
| 356 | * false otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 357 | * |
| 358 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 359 | */ |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 360 | static bool tomoyo_domain_initializer(const struct tomoyo_path_info * |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 361 | domainname, |
| 362 | const struct tomoyo_path_info *program, |
| 363 | const struct tomoyo_path_info * |
| 364 | last_name) |
| 365 | { |
| 366 | struct tomoyo_domain_initializer_entry *ptr; |
| 367 | bool flag = false; |
| 368 | |
Tetsuo Handa | 82e0f00 | 2010-06-15 09:22:42 +0900 | [diff] [blame] | 369 | list_for_each_entry_rcu(ptr, &tomoyo_domain_initializer_list, |
| 370 | head.list) { |
| 371 | if (ptr->head.is_deleted) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 372 | continue; |
| 373 | if (ptr->domainname) { |
| 374 | if (!ptr->is_last_name) { |
| 375 | if (ptr->domainname != domainname) |
| 376 | continue; |
| 377 | } else { |
| 378 | if (tomoyo_pathcmp(ptr->domainname, last_name)) |
| 379 | continue; |
| 380 | } |
| 381 | } |
| 382 | if (tomoyo_pathcmp(ptr->program, program)) |
| 383 | continue; |
| 384 | if (ptr->is_not) { |
| 385 | flag = false; |
| 386 | break; |
| 387 | } |
| 388 | flag = true; |
| 389 | } |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 390 | return flag; |
| 391 | } |
| 392 | |
Tetsuo Handa | c3fa109 | 2009-06-08 12:37:39 +0900 | [diff] [blame] | 393 | /* |
| 394 | * tomoyo_domain_keeper_list is used for holding list of domainnames which |
| 395 | * suppresses domain transition. Normally, a domainname is monotonically |
| 396 | * getting longer. But sometimes, we want to suppress domain transition. |
| 397 | * It would be convenient for us that programs executed from a login session |
| 398 | * belong to the same domain. Thus, TOMOYO provides a way to suppress domain |
| 399 | * transition. |
| 400 | * |
| 401 | * An entry is added by |
| 402 | * |
| 403 | * # echo 'keep_domain <kernel> /usr/sbin/sshd /bin/bash' > \ |
| 404 | * /sys/kernel/security/tomoyo/exception_policy |
| 405 | * |
| 406 | * and is deleted by |
| 407 | * |
| 408 | * # echo 'delete keep_domain <kernel> /usr/sbin/sshd /bin/bash' > \ |
| 409 | * /sys/kernel/security/tomoyo/exception_policy |
| 410 | * |
| 411 | * and all entries are retrieved by |
| 412 | * |
| 413 | * # grep ^keep_domain /sys/kernel/security/tomoyo/exception_policy |
| 414 | * |
| 415 | * In the example above, any process which belongs to |
| 416 | * "<kernel> /usr/sbin/sshd /bin/bash" domain will remain in that domain, |
| 417 | * unless explicitly specified by "initialize_domain" or "no_keep_domain". |
| 418 | * |
| 419 | * You may specify a program using "from" keyword. |
| 420 | * "keep_domain /bin/pwd from <kernel> /usr/sbin/sshd /bin/bash" |
| 421 | * will cause "/bin/pwd" executed from "<kernel> /usr/sbin/sshd /bin/bash" |
| 422 | * domain to remain in "<kernel> /usr/sbin/sshd /bin/bash" domain. |
| 423 | * |
| 424 | * You may add "no_" prefix to "keep_domain". |
| 425 | * "keep_domain <kernel> /usr/sbin/sshd /bin/bash" and |
| 426 | * "no_keep_domain /usr/bin/passwd from <kernel> /usr/sbin/sshd /bin/bash" will |
| 427 | * cause "/usr/bin/passwd" to belong to |
| 428 | * "<kernel> /usr/sbin/sshd /bin/bash /usr/bin/passwd" domain, unless |
| 429 | * explicitly specified by "initialize_domain". |
| 430 | */ |
Tetsuo Handa | 847b173 | 2010-02-11 09:43:54 +0900 | [diff] [blame] | 431 | LIST_HEAD(tomoyo_domain_keeper_list); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 432 | |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 433 | static bool tomoyo_same_domain_keeper_entry(const struct tomoyo_acl_head *a, |
| 434 | const struct tomoyo_acl_head *b) |
| 435 | { |
| 436 | const struct tomoyo_domain_keeper_entry *p1 = |
| 437 | container_of(a, typeof(*p1), head); |
| 438 | const struct tomoyo_domain_keeper_entry *p2 = |
| 439 | container_of(b, typeof(*p2), head); |
| 440 | return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name |
| 441 | && p1->domainname == p2->domainname |
| 442 | && p1->program == p2->program; |
| 443 | } |
| 444 | |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 445 | /** |
| 446 | * tomoyo_update_domain_keeper_entry - Update "struct tomoyo_domain_keeper_entry" list. |
| 447 | * |
| 448 | * @domainname: The name of domain. |
| 449 | * @program: The name of program. May be NULL. |
| 450 | * @is_not: True if it is "no_keep_domain" entry. |
| 451 | * @is_delete: True if it is a delete request. |
| 452 | * |
| 453 | * Returns 0 on success, negative value otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 454 | * |
| 455 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 456 | */ |
| 457 | static int tomoyo_update_domain_keeper_entry(const char *domainname, |
| 458 | const char *program, |
| 459 | const bool is_not, |
| 460 | const bool is_delete) |
| 461 | { |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 462 | struct tomoyo_domain_keeper_entry e = { .is_not = is_not }; |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 463 | int error = is_delete ? -ENOENT : -ENOMEM; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 464 | |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 465 | if (!tomoyo_domain_def(domainname) && |
| 466 | tomoyo_correct_path(domainname)) |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 467 | e.is_last_name = true; |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 468 | else if (!tomoyo_correct_domain(domainname)) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 469 | return -EINVAL; |
| 470 | if (program) { |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 471 | if (!tomoyo_correct_path(program)) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 472 | return -EINVAL; |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 473 | e.program = tomoyo_get_name(program); |
| 474 | if (!e.program) |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 475 | goto out; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 476 | } |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 477 | e.domainname = tomoyo_get_name(domainname); |
| 478 | if (!e.domainname) |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 479 | goto out; |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 480 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
| 481 | &tomoyo_domain_keeper_list, |
| 482 | tomoyo_same_domain_keeper_entry); |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 483 | out: |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 484 | tomoyo_put_name(e.domainname); |
| 485 | tomoyo_put_name(e.program); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 486 | return error; |
| 487 | } |
| 488 | |
| 489 | /** |
| 490 | * tomoyo_write_domain_keeper_policy - Write "struct tomoyo_domain_keeper_entry" list. |
| 491 | * |
| 492 | * @data: String to parse. |
| 493 | * @is_not: True if it is "no_keep_domain" entry. |
| 494 | * @is_delete: True if it is a delete request. |
| 495 | * |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 496 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 497 | */ |
| 498 | int tomoyo_write_domain_keeper_policy(char *data, const bool is_not, |
| 499 | const bool is_delete) |
| 500 | { |
| 501 | char *cp = strstr(data, " from "); |
| 502 | |
| 503 | if (cp) { |
| 504 | *cp = '\0'; |
| 505 | return tomoyo_update_domain_keeper_entry(cp + 6, data, is_not, |
| 506 | is_delete); |
| 507 | } |
| 508 | return tomoyo_update_domain_keeper_entry(data, NULL, is_not, is_delete); |
| 509 | } |
| 510 | |
| 511 | /** |
| 512 | * tomoyo_read_domain_keeper_policy - Read "struct tomoyo_domain_keeper_entry" list. |
| 513 | * |
| 514 | * @head: Pointer to "struct tomoyo_io_buffer". |
| 515 | * |
| 516 | * Returns true on success, false otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 517 | * |
| 518 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 519 | */ |
| 520 | bool tomoyo_read_domain_keeper_policy(struct tomoyo_io_buffer *head) |
| 521 | { |
| 522 | struct list_head *pos; |
Tetsuo Handa | 33043cb | 2009-02-13 16:00:58 +0900 | [diff] [blame] | 523 | bool done = true; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 524 | |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 525 | list_for_each_cookie(pos, head->read_var2, |
| 526 | &tomoyo_domain_keeper_list) { |
| 527 | struct tomoyo_domain_keeper_entry *ptr; |
| 528 | const char *no; |
| 529 | const char *from = ""; |
| 530 | const char *program = ""; |
| 531 | |
Tetsuo Handa | 82e0f00 | 2010-06-15 09:22:42 +0900 | [diff] [blame] | 532 | ptr = list_entry(pos, struct tomoyo_domain_keeper_entry, |
| 533 | head.list); |
| 534 | if (ptr->head.is_deleted) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 535 | continue; |
| 536 | no = ptr->is_not ? "no_" : ""; |
| 537 | if (ptr->program) { |
| 538 | from = " from "; |
| 539 | program = ptr->program->name; |
| 540 | } |
Tetsuo Handa | 7d2948b | 2009-06-02 20:42:24 +0900 | [diff] [blame] | 541 | done = tomoyo_io_printf(head, |
| 542 | "%s" TOMOYO_KEYWORD_KEEP_DOMAIN |
| 543 | "%s%s%s\n", no, program, from, |
| 544 | ptr->domainname->name); |
| 545 | if (!done) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 546 | break; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 547 | } |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 548 | return done; |
| 549 | } |
| 550 | |
| 551 | /** |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 552 | * tomoyo_domain_keeper - Check whether the given program causes domain transition suppression. |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 553 | * |
| 554 | * @domainname: The name of domain. |
| 555 | * @program: The name of program. |
| 556 | * @last_name: The last component of @domainname. |
| 557 | * |
| 558 | * Returns true if executing @program supresses domain transition, |
| 559 | * false otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 560 | * |
| 561 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 562 | */ |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 563 | static bool tomoyo_domain_keeper(const struct tomoyo_path_info *domainname, |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 564 | const struct tomoyo_path_info *program, |
| 565 | const struct tomoyo_path_info *last_name) |
| 566 | { |
| 567 | struct tomoyo_domain_keeper_entry *ptr; |
| 568 | bool flag = false; |
| 569 | |
Tetsuo Handa | 82e0f00 | 2010-06-15 09:22:42 +0900 | [diff] [blame] | 570 | list_for_each_entry_rcu(ptr, &tomoyo_domain_keeper_list, head.list) { |
| 571 | if (ptr->head.is_deleted) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 572 | continue; |
| 573 | if (!ptr->is_last_name) { |
| 574 | if (ptr->domainname != domainname) |
| 575 | continue; |
| 576 | } else { |
| 577 | if (tomoyo_pathcmp(ptr->domainname, last_name)) |
| 578 | continue; |
| 579 | } |
| 580 | if (ptr->program && tomoyo_pathcmp(ptr->program, program)) |
| 581 | continue; |
| 582 | if (ptr->is_not) { |
| 583 | flag = false; |
| 584 | break; |
| 585 | } |
| 586 | flag = true; |
| 587 | } |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 588 | return flag; |
| 589 | } |
| 590 | |
Tetsuo Handa | c3fa109 | 2009-06-08 12:37:39 +0900 | [diff] [blame] | 591 | /* |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 592 | * tomoyo_aggregator_list is used for holding list of rewrite table for |
| 593 | * execve() request. Some programs provides similar functionality. This keyword |
| 594 | * allows users to aggregate such programs. |
| 595 | * |
| 596 | * Entries are added by |
| 597 | * |
| 598 | * # echo 'aggregator /usr/bin/vi /./editor' > \ |
| 599 | * /sys/kernel/security/tomoyo/exception_policy |
| 600 | * # echo 'aggregator /usr/bin/emacs /./editor' > \ |
| 601 | * /sys/kernel/security/tomoyo/exception_policy |
| 602 | * |
| 603 | * and are deleted by |
| 604 | * |
| 605 | * # echo 'delete aggregator /usr/bin/vi /./editor' > \ |
| 606 | * /sys/kernel/security/tomoyo/exception_policy |
| 607 | * # echo 'delete aggregator /usr/bin/emacs /./editor' > \ |
| 608 | * /sys/kernel/security/tomoyo/exception_policy |
| 609 | * |
| 610 | * and all entries are retrieved by |
| 611 | * |
| 612 | * # grep ^aggregator /sys/kernel/security/tomoyo/exception_policy |
| 613 | * |
| 614 | * In the example above, if /usr/bin/vi or /usr/bin/emacs are executed, |
| 615 | * permission is checked for /./editor and domainname which the current process |
| 616 | * will belong to after execve() succeeds is calculated using /./editor . |
| 617 | */ |
| 618 | LIST_HEAD(tomoyo_aggregator_list); |
| 619 | |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 620 | static bool tomoyo_same_aggregator_entry(const struct tomoyo_acl_head *a, |
| 621 | const struct tomoyo_acl_head *b) |
| 622 | { |
| 623 | const struct tomoyo_aggregator_entry *p1 = container_of(a, typeof(*p1), |
| 624 | head); |
| 625 | const struct tomoyo_aggregator_entry *p2 = container_of(b, typeof(*p2), |
| 626 | head); |
| 627 | return p1->original_name == p2->original_name && |
| 628 | p1->aggregated_name == p2->aggregated_name; |
| 629 | } |
| 630 | |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 631 | /** |
| 632 | * tomoyo_update_aggregator_entry - Update "struct tomoyo_aggregator_entry" list. |
| 633 | * |
| 634 | * @original_name: The original program's name. |
| 635 | * @aggregated_name: The program name to use. |
| 636 | * @is_delete: True if it is a delete request. |
| 637 | * |
| 638 | * Returns 0 on success, negative value otherwise. |
| 639 | * |
| 640 | * Caller holds tomoyo_read_lock(). |
| 641 | */ |
| 642 | static int tomoyo_update_aggregator_entry(const char *original_name, |
| 643 | const char *aggregated_name, |
| 644 | const bool is_delete) |
| 645 | { |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 646 | struct tomoyo_aggregator_entry e = { }; |
| 647 | int error = is_delete ? -ENOENT : -ENOMEM; |
| 648 | |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 649 | if (!tomoyo_correct_path(original_name) || |
| 650 | !tomoyo_correct_path(aggregated_name)) |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 651 | return -EINVAL; |
| 652 | e.original_name = tomoyo_get_name(original_name); |
| 653 | e.aggregated_name = tomoyo_get_name(aggregated_name); |
| 654 | if (!e.original_name || !e.aggregated_name || |
| 655 | e.aggregated_name->is_patterned) /* No patterns allowed. */ |
| 656 | goto out; |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 657 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
| 658 | &tomoyo_aggregator_list, |
| 659 | tomoyo_same_aggregator_entry); |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 660 | out: |
| 661 | tomoyo_put_name(e.original_name); |
| 662 | tomoyo_put_name(e.aggregated_name); |
| 663 | return error; |
| 664 | } |
| 665 | |
| 666 | /** |
| 667 | * tomoyo_read_aggregator_policy - Read "struct tomoyo_aggregator_entry" list. |
| 668 | * |
| 669 | * @head: Pointer to "struct tomoyo_io_buffer". |
| 670 | * |
| 671 | * Returns true on success, false otherwise. |
| 672 | * |
| 673 | * Caller holds tomoyo_read_lock(). |
| 674 | */ |
| 675 | bool tomoyo_read_aggregator_policy(struct tomoyo_io_buffer *head) |
| 676 | { |
| 677 | struct list_head *pos; |
| 678 | bool done = true; |
| 679 | |
| 680 | list_for_each_cookie(pos, head->read_var2, &tomoyo_aggregator_list) { |
| 681 | struct tomoyo_aggregator_entry *ptr; |
| 682 | |
Tetsuo Handa | 82e0f00 | 2010-06-15 09:22:42 +0900 | [diff] [blame] | 683 | ptr = list_entry(pos, struct tomoyo_aggregator_entry, |
| 684 | head.list); |
| 685 | if (ptr->head.is_deleted) |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 686 | continue; |
| 687 | done = tomoyo_io_printf(head, TOMOYO_KEYWORD_AGGREGATOR |
| 688 | "%s %s\n", ptr->original_name->name, |
| 689 | ptr->aggregated_name->name); |
| 690 | if (!done) |
| 691 | break; |
| 692 | } |
| 693 | return done; |
| 694 | } |
| 695 | |
| 696 | /** |
| 697 | * tomoyo_write_aggregator_policy - Write "struct tomoyo_aggregator_entry" list. |
| 698 | * |
| 699 | * @data: String to parse. |
| 700 | * @is_delete: True if it is a delete request. |
| 701 | * |
| 702 | * Returns 0 on success, negative value otherwise. |
| 703 | * |
| 704 | * Caller holds tomoyo_read_lock(). |
| 705 | */ |
| 706 | int tomoyo_write_aggregator_policy(char *data, const bool is_delete) |
| 707 | { |
| 708 | char *cp = strchr(data, ' '); |
| 709 | |
| 710 | if (!cp) |
| 711 | return -EINVAL; |
| 712 | *cp++ = '\0'; |
| 713 | return tomoyo_update_aggregator_entry(data, cp, is_delete); |
| 714 | } |
| 715 | |
| 716 | /* |
Tetsuo Handa | c3fa109 | 2009-06-08 12:37:39 +0900 | [diff] [blame] | 717 | * tomoyo_alias_list is used for holding list of symlink's pathnames which are |
| 718 | * allowed to be passed to an execve() request. Normally, the domainname which |
| 719 | * the current process will belong to after execve() succeeds is calculated |
| 720 | * using dereferenced pathnames. But some programs behave differently depending |
| 721 | * on the name passed to argv[0]. For busybox, calculating domainname using |
| 722 | * dereferenced pathnames will cause all programs in the busybox to belong to |
| 723 | * the same domain. Thus, TOMOYO provides a way to allow use of symlink's |
| 724 | * pathname for checking execve()'s permission and calculating domainname which |
| 725 | * the current process will belong to after execve() succeeds. |
| 726 | * |
| 727 | * An entry is added by |
| 728 | * |
| 729 | * # echo 'alias /bin/busybox /bin/cat' > \ |
| 730 | * /sys/kernel/security/tomoyo/exception_policy |
| 731 | * |
| 732 | * and is deleted by |
| 733 | * |
| 734 | * # echo 'delete alias /bin/busybox /bin/cat' > \ |
| 735 | * /sys/kernel/security/tomoyo/exception_policy |
| 736 | * |
| 737 | * and all entries are retrieved by |
| 738 | * |
| 739 | * # grep ^alias /sys/kernel/security/tomoyo/exception_policy |
| 740 | * |
| 741 | * In the example above, if /bin/cat is a symlink to /bin/busybox and execution |
| 742 | * of /bin/cat is requested, permission is checked for /bin/cat rather than |
| 743 | * /bin/busybox and domainname which the current process will belong to after |
| 744 | * execve() succeeds is calculated using /bin/cat rather than /bin/busybox . |
| 745 | */ |
Tetsuo Handa | 847b173 | 2010-02-11 09:43:54 +0900 | [diff] [blame] | 746 | LIST_HEAD(tomoyo_alias_list); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 747 | |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 748 | static bool tomoyo_same_alias_entry(const struct tomoyo_acl_head *a, |
| 749 | const struct tomoyo_acl_head *b) |
| 750 | { |
| 751 | const struct tomoyo_alias_entry *p1 = container_of(a, typeof(*p1), |
| 752 | head); |
| 753 | const struct tomoyo_alias_entry *p2 = container_of(b, typeof(*p2), |
| 754 | head); |
| 755 | return p1->original_name == p2->original_name && |
| 756 | p1->aliased_name == p2->aliased_name; |
| 757 | } |
| 758 | |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 759 | /** |
| 760 | * tomoyo_update_alias_entry - Update "struct tomoyo_alias_entry" list. |
| 761 | * |
| 762 | * @original_name: The original program's real name. |
| 763 | * @aliased_name: The symbolic program's symbolic link's name. |
| 764 | * @is_delete: True if it is a delete request. |
| 765 | * |
| 766 | * Returns 0 on success, negative value otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 767 | * |
| 768 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 769 | */ |
| 770 | static int tomoyo_update_alias_entry(const char *original_name, |
| 771 | const char *aliased_name, |
| 772 | const bool is_delete) |
| 773 | { |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 774 | struct tomoyo_alias_entry e = { }; |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 775 | int error = is_delete ? -ENOENT : -ENOMEM; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 776 | |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 777 | if (!tomoyo_correct_path(original_name) || |
| 778 | !tomoyo_correct_path(aliased_name)) |
Tetsuo Handa | 3f62963 | 2010-06-03 20:37:26 +0900 | [diff] [blame] | 779 | return -EINVAL; |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 780 | e.original_name = tomoyo_get_name(original_name); |
| 781 | e.aliased_name = tomoyo_get_name(aliased_name); |
Tetsuo Handa | 3f62963 | 2010-06-03 20:37:26 +0900 | [diff] [blame] | 782 | if (!e.original_name || !e.aliased_name || |
| 783 | e.original_name->is_patterned || e.aliased_name->is_patterned) |
| 784 | goto out; /* No patterns allowed. */ |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 785 | error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, |
| 786 | &tomoyo_alias_list, |
| 787 | tomoyo_same_alias_entry); |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 788 | out: |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 789 | tomoyo_put_name(e.original_name); |
| 790 | tomoyo_put_name(e.aliased_name); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 791 | return error; |
| 792 | } |
| 793 | |
| 794 | /** |
| 795 | * tomoyo_read_alias_policy - Read "struct tomoyo_alias_entry" list. |
| 796 | * |
| 797 | * @head: Pointer to "struct tomoyo_io_buffer". |
| 798 | * |
| 799 | * Returns true on success, false otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 800 | * |
| 801 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 802 | */ |
| 803 | bool tomoyo_read_alias_policy(struct tomoyo_io_buffer *head) |
| 804 | { |
| 805 | struct list_head *pos; |
| 806 | bool done = true; |
| 807 | |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 808 | list_for_each_cookie(pos, head->read_var2, &tomoyo_alias_list) { |
| 809 | struct tomoyo_alias_entry *ptr; |
| 810 | |
Tetsuo Handa | 82e0f00 | 2010-06-15 09:22:42 +0900 | [diff] [blame] | 811 | ptr = list_entry(pos, struct tomoyo_alias_entry, head.list); |
| 812 | if (ptr->head.is_deleted) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 813 | continue; |
Tetsuo Handa | 7d2948b | 2009-06-02 20:42:24 +0900 | [diff] [blame] | 814 | done = tomoyo_io_printf(head, TOMOYO_KEYWORD_ALIAS "%s %s\n", |
| 815 | ptr->original_name->name, |
| 816 | ptr->aliased_name->name); |
| 817 | if (!done) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 818 | break; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 819 | } |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 820 | return done; |
| 821 | } |
| 822 | |
| 823 | /** |
| 824 | * tomoyo_write_alias_policy - Write "struct tomoyo_alias_entry" list. |
| 825 | * |
| 826 | * @data: String to parse. |
| 827 | * @is_delete: True if it is a delete request. |
| 828 | * |
| 829 | * Returns 0 on success, negative value otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 830 | * |
| 831 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 832 | */ |
| 833 | int tomoyo_write_alias_policy(char *data, const bool is_delete) |
| 834 | { |
| 835 | char *cp = strchr(data, ' '); |
| 836 | |
| 837 | if (!cp) |
| 838 | return -EINVAL; |
| 839 | *cp++ = '\0'; |
| 840 | return tomoyo_update_alias_entry(data, cp, is_delete); |
| 841 | } |
| 842 | |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 843 | /** |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 844 | * tomoyo_find_or_assign_new_domain - Create a domain. |
| 845 | * |
| 846 | * @domainname: The name of domain. |
| 847 | * @profile: Profile number to assign if the domain was newly created. |
| 848 | * |
| 849 | * Returns pointer to "struct tomoyo_domain_info" on success, NULL otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 850 | * |
| 851 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 852 | */ |
| 853 | struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char * |
| 854 | domainname, |
| 855 | const u8 profile) |
| 856 | { |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 857 | struct tomoyo_domain_info *entry; |
Tetsuo Handa | 2928238 | 2010-05-06 00:18:15 +0900 | [diff] [blame] | 858 | struct tomoyo_domain_info *domain = NULL; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 859 | const struct tomoyo_path_info *saved_domainname; |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 860 | bool found = false; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 861 | |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 862 | if (!tomoyo_correct_domain(domainname)) |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 863 | return NULL; |
Tetsuo Handa | bf24fb0 | 2010-02-11 09:41:58 +0900 | [diff] [blame] | 864 | saved_domainname = tomoyo_get_name(domainname); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 865 | if (!saved_domainname) |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 866 | return NULL; |
Tetsuo Handa | 4e5d6f7 | 2010-04-28 14:17:42 +0900 | [diff] [blame] | 867 | entry = kzalloc(sizeof(*entry), GFP_NOFS); |
Tetsuo Handa | 2928238 | 2010-05-06 00:18:15 +0900 | [diff] [blame] | 868 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
| 869 | goto out; |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 870 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
| 871 | if (domain->is_deleted || |
| 872 | tomoyo_pathcmp(saved_domainname, domain->domainname)) |
| 873 | continue; |
| 874 | found = true; |
| 875 | break; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 876 | } |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 877 | if (!found && tomoyo_memory_ok(entry)) { |
| 878 | INIT_LIST_HEAD(&entry->acl_info_list); |
| 879 | entry->domainname = saved_domainname; |
Tetsuo Handa | bf24fb0 | 2010-02-11 09:41:58 +0900 | [diff] [blame] | 880 | saved_domainname = NULL; |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 881 | entry->profile = profile; |
| 882 | list_add_tail_rcu(&entry->list, &tomoyo_domain_list); |
| 883 | domain = entry; |
| 884 | entry = NULL; |
| 885 | found = true; |
| 886 | } |
Tetsuo Handa | f737d95 | 2010-01-03 21:16:32 +0900 | [diff] [blame] | 887 | mutex_unlock(&tomoyo_policy_lock); |
Tetsuo Handa | 2928238 | 2010-05-06 00:18:15 +0900 | [diff] [blame] | 888 | out: |
Tetsuo Handa | bf24fb0 | 2010-02-11 09:41:58 +0900 | [diff] [blame] | 889 | tomoyo_put_name(saved_domainname); |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 890 | kfree(entry); |
| 891 | return found ? domain : NULL; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 892 | } |
| 893 | |
| 894 | /** |
| 895 | * tomoyo_find_next_domain - Find a domain. |
| 896 | * |
Tetsuo Handa | 56f8c9bc | 2009-06-19 14:13:27 +0900 | [diff] [blame] | 897 | * @bprm: Pointer to "struct linux_binprm". |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 898 | * |
| 899 | * Returns 0 on success, negative value otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 900 | * |
| 901 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 902 | */ |
Tetsuo Handa | 56f8c9bc | 2009-06-19 14:13:27 +0900 | [diff] [blame] | 903 | int tomoyo_find_next_domain(struct linux_binprm *bprm) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 904 | { |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 905 | struct tomoyo_request_info r; |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 906 | char *tmp = kzalloc(TOMOYO_EXEC_TMPSIZE, GFP_NOFS); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 907 | struct tomoyo_domain_info *old_domain = tomoyo_domain(); |
| 908 | struct tomoyo_domain_info *domain = NULL; |
| 909 | const char *old_domain_name = old_domain->domainname->name; |
| 910 | const char *original_name = bprm->filename; |
Tetsuo Handa | 57c2590 | 2010-06-03 20:38:44 +0900 | [diff] [blame] | 911 | u8 mode; |
| 912 | bool is_enforce; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 913 | int retval = -ENOMEM; |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 914 | bool need_kfree = false; |
| 915 | struct tomoyo_path_info rn = { }; /* real name */ |
| 916 | struct tomoyo_path_info sn = { }; /* symlink name */ |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 917 | struct tomoyo_path_info ln; /* last name */ |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 918 | |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 919 | ln.name = tomoyo_get_last_name(old_domain); |
| 920 | tomoyo_fill_path_info(&ln); |
Tetsuo Handa | 57c2590 | 2010-06-03 20:38:44 +0900 | [diff] [blame] | 921 | mode = tomoyo_init_request_info(&r, NULL, TOMOYO_MAC_FILE_EXECUTE); |
| 922 | is_enforce = (mode == TOMOYO_CONFIG_ENFORCING); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 923 | if (!tmp) |
| 924 | goto out; |
| 925 | |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 926 | retry: |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 927 | if (need_kfree) { |
| 928 | kfree(rn.name); |
| 929 | need_kfree = false; |
| 930 | } |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 931 | /* Get tomoyo_realpath of program. */ |
| 932 | retval = -ENOENT; |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 933 | rn.name = tomoyo_realpath(original_name); |
| 934 | if (!rn.name) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 935 | goto out; |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 936 | tomoyo_fill_path_info(&rn); |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 937 | need_kfree = true; |
| 938 | |
| 939 | /* Get tomoyo_realpath of symbolic link. */ |
| 940 | sn.name = tomoyo_realpath_nofollow(original_name); |
| 941 | if (!sn.name) |
| 942 | goto out; |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 943 | tomoyo_fill_path_info(&sn); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 944 | |
| 945 | /* Check 'alias' directive. */ |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 946 | if (tomoyo_pathcmp(&rn, &sn)) { |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 947 | struct tomoyo_alias_entry *ptr; |
| 948 | /* Is this program allowed to be called via symbolic links? */ |
Tetsuo Handa | 82e0f00 | 2010-06-15 09:22:42 +0900 | [diff] [blame] | 949 | list_for_each_entry_rcu(ptr, &tomoyo_alias_list, head.list) { |
| 950 | if (ptr->head.is_deleted || |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 951 | tomoyo_pathcmp(&rn, ptr->original_name) || |
| 952 | tomoyo_pathcmp(&sn, ptr->aliased_name)) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 953 | continue; |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 954 | kfree(rn.name); |
| 955 | need_kfree = false; |
| 956 | /* This is OK because it is read only. */ |
| 957 | rn = *ptr->aliased_name; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 958 | break; |
| 959 | } |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 960 | } |
| 961 | |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 962 | /* Check 'aggregator' directive. */ |
| 963 | { |
| 964 | struct tomoyo_aggregator_entry *ptr; |
Tetsuo Handa | 82e0f00 | 2010-06-15 09:22:42 +0900 | [diff] [blame] | 965 | list_for_each_entry_rcu(ptr, &tomoyo_aggregator_list, |
| 966 | head.list) { |
| 967 | if (ptr->head.is_deleted || |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 968 | !tomoyo_path_matches_pattern(&rn, |
| 969 | ptr->original_name)) |
| 970 | continue; |
| 971 | if (need_kfree) |
| 972 | kfree(rn.name); |
| 973 | need_kfree = false; |
| 974 | /* This is OK because it is read only. */ |
| 975 | rn = *ptr->aggregated_name; |
| 976 | break; |
| 977 | } |
| 978 | } |
| 979 | |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 980 | /* Check execute permission. */ |
Tetsuo Handa | 05336de | 2010-06-16 16:20:24 +0900 | [diff] [blame] | 981 | retval = tomoyo_path_permission(&r, TOMOYO_TYPE_EXECUTE, &rn); |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 982 | if (retval == TOMOYO_RETRY_REQUEST) |
| 983 | goto retry; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 984 | if (retval < 0) |
| 985 | goto out; |
| 986 | |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 987 | if (tomoyo_domain_initializer(old_domain->domainname, &rn, &ln)) { |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 988 | /* Transit to the child of tomoyo_kernel_domain domain. */ |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 989 | snprintf(tmp, TOMOYO_EXEC_TMPSIZE - 1, |
| 990 | TOMOYO_ROOT_NAME " " "%s", rn.name); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 991 | } else if (old_domain == &tomoyo_kernel_domain && |
| 992 | !tomoyo_policy_loaded) { |
| 993 | /* |
| 994 | * Needn't to transit from kernel domain before starting |
| 995 | * /sbin/init. But transit from kernel domain if executing |
| 996 | * initializers because they might start before /sbin/init. |
| 997 | */ |
| 998 | domain = old_domain; |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 999 | } else if (tomoyo_domain_keeper(old_domain->domainname, &rn, &ln)) { |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 1000 | /* Keep current domain. */ |
| 1001 | domain = old_domain; |
| 1002 | } else { |
| 1003 | /* Normal domain transition. */ |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 1004 | snprintf(tmp, TOMOYO_EXEC_TMPSIZE - 1, |
| 1005 | "%s %s", old_domain_name, rn.name); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 1006 | } |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 1007 | if (domain || strlen(tmp) >= TOMOYO_EXEC_TMPSIZE - 10) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 1008 | goto done; |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 1009 | domain = tomoyo_find_domain(tmp); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 1010 | if (domain) |
| 1011 | goto done; |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 1012 | if (is_enforce) { |
| 1013 | int error = tomoyo_supervisor(&r, "# wants to create domain\n" |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 1014 | "%s\n", tmp); |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 1015 | if (error == TOMOYO_RETRY_REQUEST) |
| 1016 | goto retry; |
| 1017 | if (error < 0) |
| 1018 | goto done; |
| 1019 | } |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 1020 | domain = tomoyo_find_or_assign_new_domain(tmp, old_domain->profile); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 1021 | done: |
| 1022 | if (domain) |
| 1023 | goto out; |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 1024 | printk(KERN_WARNING "TOMOYO-ERROR: Domain '%s' not defined.\n", tmp); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 1025 | if (is_enforce) |
| 1026 | retval = -EPERM; |
| 1027 | else |
Tetsuo Handa | ea13ddb | 2010-02-03 06:43:06 +0900 | [diff] [blame] | 1028 | old_domain->transition_failed = true; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 1029 | out: |
Tetsuo Handa | 56f8c9bc | 2009-06-19 14:13:27 +0900 | [diff] [blame] | 1030 | if (!domain) |
| 1031 | domain = old_domain; |
Tetsuo Handa | ec8e6a4 | 2010-02-11 09:43:20 +0900 | [diff] [blame] | 1032 | /* Update reference count on "struct tomoyo_domain_info". */ |
| 1033 | atomic_inc(&domain->users); |
Tetsuo Handa | 56f8c9bc | 2009-06-19 14:13:27 +0900 | [diff] [blame] | 1034 | bprm->cred->security = domain; |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 1035 | if (need_kfree) |
| 1036 | kfree(rn.name); |
| 1037 | kfree(sn.name); |
Tetsuo Handa | 8e2d39a | 2010-01-26 20:45:27 +0900 | [diff] [blame] | 1038 | kfree(tmp); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 1039 | return retval; |
| 1040 | } |