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. |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 23 | * @param: Pointer to "struct tomoyo_acl_param". |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 24 | * @check_duplicate: Callback function to find duplicated entry. |
| 25 | * |
| 26 | * Returns 0 on success, negative value otherwise. |
| 27 | * |
| 28 | * Caller holds tomoyo_read_lock(). |
| 29 | */ |
| 30 | int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size, |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 31 | struct tomoyo_acl_param *param, |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 32 | bool (*check_duplicate) (const struct tomoyo_acl_head |
| 33 | *, |
| 34 | const struct tomoyo_acl_head |
| 35 | *)) |
| 36 | { |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 37 | int error = param->is_delete ? -ENOENT : -ENOMEM; |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 38 | struct tomoyo_acl_head *entry; |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 39 | struct list_head *list = param->list; |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 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; |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 46 | entry->is_deleted = param->is_delete; |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 47 | error = 0; |
| 48 | break; |
| 49 | } |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 50 | if (error && !param->is_delete) { |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 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 | 0df7e8b | 2011-06-26 23:16:36 +0900 | [diff] [blame] | 62 | * tomoyo_same_acl_head - Check for duplicated "struct tomoyo_acl_info" entry. |
| 63 | * |
| 64 | * @a: Pointer to "struct tomoyo_acl_info". |
| 65 | * @b: Pointer to "struct tomoyo_acl_info". |
| 66 | * |
| 67 | * Returns true if @a == @b, false otherwise. |
| 68 | */ |
| 69 | static inline bool tomoyo_same_acl_head(const struct tomoyo_acl_info *a, |
| 70 | const struct tomoyo_acl_info *b) |
| 71 | { |
| 72 | return a->type == b->type; |
| 73 | } |
| 74 | |
| 75 | /** |
Tetsuo Handa | 237ab45 | 2010-06-12 20:46:22 +0900 | [diff] [blame] | 76 | * tomoyo_update_domain - Update an entry for domain policy. |
| 77 | * |
| 78 | * @new_entry: Pointer to "struct tomoyo_acl_info". |
| 79 | * @size: Size of @new_entry in bytes. |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 80 | * @param: Pointer to "struct tomoyo_acl_param". |
Tetsuo Handa | 237ab45 | 2010-06-12 20:46:22 +0900 | [diff] [blame] | 81 | * @check_duplicate: Callback function to find duplicated entry. |
| 82 | * @merge_duplicate: Callback function to merge duplicated entry. |
| 83 | * |
| 84 | * Returns 0 on success, negative value otherwise. |
| 85 | * |
| 86 | * Caller holds tomoyo_read_lock(). |
| 87 | */ |
| 88 | int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size, |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 89 | struct tomoyo_acl_param *param, |
Tetsuo Handa | 237ab45 | 2010-06-12 20:46:22 +0900 | [diff] [blame] | 90 | bool (*check_duplicate) (const struct tomoyo_acl_info |
| 91 | *, |
| 92 | const struct tomoyo_acl_info |
| 93 | *), |
| 94 | bool (*merge_duplicate) (struct tomoyo_acl_info *, |
| 95 | struct tomoyo_acl_info *, |
| 96 | const bool)) |
| 97 | { |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 98 | const bool is_delete = param->is_delete; |
Tetsuo Handa | 237ab45 | 2010-06-12 20:46:22 +0900 | [diff] [blame] | 99 | int error = is_delete ? -ENOENT : -ENOMEM; |
| 100 | struct tomoyo_acl_info *entry; |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 101 | struct list_head * const list = param->list; |
Tetsuo Handa | 237ab45 | 2010-06-12 20:46:22 +0900 | [diff] [blame] | 102 | |
| 103 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
| 104 | return error; |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 105 | list_for_each_entry_rcu(entry, list, list) { |
Tetsuo Handa | 0df7e8b | 2011-06-26 23:16:36 +0900 | [diff] [blame] | 106 | if (!tomoyo_same_acl_head(entry, new_entry) || |
| 107 | !check_duplicate(entry, new_entry)) |
Tetsuo Handa | 237ab45 | 2010-06-12 20:46:22 +0900 | [diff] [blame] | 108 | continue; |
| 109 | if (merge_duplicate) |
| 110 | entry->is_deleted = merge_duplicate(entry, new_entry, |
| 111 | is_delete); |
| 112 | else |
| 113 | entry->is_deleted = is_delete; |
| 114 | error = 0; |
| 115 | break; |
| 116 | } |
| 117 | if (error && !is_delete) { |
| 118 | entry = tomoyo_commit_ok(new_entry, size); |
| 119 | if (entry) { |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 120 | list_add_tail_rcu(&entry->list, list); |
Tetsuo Handa | 237ab45 | 2010-06-12 20:46:22 +0900 | [diff] [blame] | 121 | error = 0; |
| 122 | } |
| 123 | } |
| 124 | mutex_unlock(&tomoyo_policy_lock); |
| 125 | return error; |
| 126 | } |
| 127 | |
Tetsuo Handa | 99a8525 | 2010-06-16 16:22:51 +0900 | [diff] [blame] | 128 | void tomoyo_check_acl(struct tomoyo_request_info *r, |
Tetsuo Handa | 484ca79 | 2010-07-29 14:29:55 +0900 | [diff] [blame] | 129 | bool (*check_entry) (struct tomoyo_request_info *, |
Tetsuo Handa | 99a8525 | 2010-06-16 16:22:51 +0900 | [diff] [blame] | 130 | const struct tomoyo_acl_info *)) |
| 131 | { |
| 132 | const struct tomoyo_domain_info *domain = r->domain; |
| 133 | struct tomoyo_acl_info *ptr; |
| 134 | |
| 135 | list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
| 136 | if (ptr->is_deleted || ptr->type != r->param_type) |
| 137 | continue; |
| 138 | if (check_entry(r, ptr)) { |
| 139 | r->granted = true; |
| 140 | return; |
| 141 | } |
| 142 | } |
| 143 | r->granted = false; |
| 144 | } |
| 145 | |
Tetsuo Handa | a230f9e | 2010-06-17 16:53:24 +0900 | [diff] [blame] | 146 | /* The list for "struct tomoyo_domain_info". */ |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 147 | LIST_HEAD(tomoyo_domain_list); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 148 | |
Tetsuo Handa | a230f9e | 2010-06-17 16:53:24 +0900 | [diff] [blame] | 149 | struct list_head tomoyo_policy_list[TOMOYO_MAX_POLICY]; |
| 150 | struct list_head tomoyo_group_list[TOMOYO_MAX_GROUP]; |
| 151 | |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 152 | /** |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 153 | * tomoyo_last_word - Get last component of a domainname. |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 154 | * |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 155 | * @domainname: Domainname to check. |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 156 | * |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 157 | * Returns the last word of @domainname. |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 158 | */ |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 159 | static const char *tomoyo_last_word(const char *name) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 160 | { |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 161 | const char *cp = strrchr(name, ' '); |
| 162 | if (cp) |
| 163 | return cp + 1; |
| 164 | return name; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 165 | } |
| 166 | |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 167 | /** |
| 168 | * tomoyo_same_transition_control - Check for duplicated "struct tomoyo_transition_control" entry. |
| 169 | * |
| 170 | * @a: Pointer to "struct tomoyo_acl_head". |
| 171 | * @b: Pointer to "struct tomoyo_acl_head". |
| 172 | * |
| 173 | * Returns true if @a == @b, false otherwise. |
| 174 | */ |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 175 | static bool tomoyo_same_transition_control(const struct tomoyo_acl_head *a, |
| 176 | const struct tomoyo_acl_head *b) |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 177 | { |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 178 | const struct tomoyo_transition_control *p1 = container_of(a, |
| 179 | typeof(*p1), |
| 180 | head); |
| 181 | const struct tomoyo_transition_control *p2 = container_of(b, |
| 182 | typeof(*p2), |
| 183 | head); |
| 184 | return p1->type == p2->type && p1->is_last_name == p2->is_last_name |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 185 | && p1->domainname == p2->domainname |
| 186 | && p1->program == p2->program; |
| 187 | } |
| 188 | |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 189 | /** |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 190 | * tomoyo_write_transition_control - Write "struct tomoyo_transition_control" list. |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 191 | * |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 192 | * @param: Pointer to "struct tomoyo_acl_param". |
| 193 | * @type: Type of this entry. |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 194 | * |
| 195 | * Returns 0 on success, negative value otherwise. |
| 196 | */ |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 197 | int tomoyo_write_transition_control(struct tomoyo_acl_param *param, |
| 198 | const u8 type) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 199 | { |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 200 | struct tomoyo_transition_control e = { .type = type }; |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 201 | int error = param->is_delete ? -ENOENT : -ENOMEM; |
| 202 | char *program = param->data; |
| 203 | char *domainname = strstr(program, " from "); |
| 204 | if (domainname) { |
| 205 | *domainname = '\0'; |
| 206 | domainname += 6; |
| 207 | } else if (type == TOMOYO_TRANSITION_CONTROL_NO_KEEP || |
| 208 | type == TOMOYO_TRANSITION_CONTROL_KEEP) { |
| 209 | domainname = program; |
| 210 | program = NULL; |
| 211 | } |
Tetsuo Handa | 0d2171d | 2011-06-26 23:17:46 +0900 | [diff] [blame] | 212 | if (program && strcmp(program, "any")) { |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 213 | if (!tomoyo_correct_path(program)) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 214 | return -EINVAL; |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 215 | e.program = tomoyo_get_name(program); |
| 216 | if (!e.program) |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 217 | goto out; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 218 | } |
Tetsuo Handa | 0d2171d | 2011-06-26 23:17:46 +0900 | [diff] [blame] | 219 | if (domainname && strcmp(domainname, "any")) { |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 220 | if (!tomoyo_correct_domain(domainname)) { |
| 221 | if (!tomoyo_correct_path(domainname)) |
| 222 | goto out; |
| 223 | e.is_last_name = true; |
| 224 | } |
| 225 | e.domainname = tomoyo_get_name(domainname); |
| 226 | if (!e.domainname) |
| 227 | goto out; |
| 228 | } |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 229 | param->list = &tomoyo_policy_list[TOMOYO_ID_TRANSITION_CONTROL]; |
| 230 | error = tomoyo_update_policy(&e.head, sizeof(e), param, |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 231 | tomoyo_same_transition_control); |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 232 | out: |
Tetsuo Handa | 9e4b50e | 2010-05-06 12:40:02 +0900 | [diff] [blame] | 233 | tomoyo_put_name(e.domainname); |
| 234 | tomoyo_put_name(e.program); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 235 | return error; |
| 236 | } |
| 237 | |
| 238 | /** |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 239 | * tomoyo_transition_type - Get domain transition type. |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 240 | * |
| 241 | * @domainname: The name of domain. |
| 242 | * @program: The name of program. |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 243 | * |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 244 | * Returns TOMOYO_TRANSITION_CONTROL_INITIALIZE if executing @program |
| 245 | * reinitializes domain transition, TOMOYO_TRANSITION_CONTROL_KEEP if executing |
| 246 | * @program suppresses domain transition, others otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 247 | * |
| 248 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 249 | */ |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 250 | static u8 tomoyo_transition_type(const struct tomoyo_path_info *domainname, |
| 251 | const struct tomoyo_path_info *program) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 252 | { |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 253 | const struct tomoyo_transition_control *ptr; |
| 254 | const char *last_name = tomoyo_last_word(domainname->name); |
| 255 | u8 type; |
| 256 | for (type = 0; type < TOMOYO_MAX_TRANSITION_TYPE; type++) { |
| 257 | next: |
| 258 | list_for_each_entry_rcu(ptr, &tomoyo_policy_list |
| 259 | [TOMOYO_ID_TRANSITION_CONTROL], |
| 260 | head.list) { |
| 261 | if (ptr->head.is_deleted || ptr->type != type) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 262 | continue; |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 263 | if (ptr->domainname) { |
| 264 | if (!ptr->is_last_name) { |
| 265 | if (ptr->domainname != domainname) |
| 266 | continue; |
| 267 | } else { |
| 268 | /* |
| 269 | * Use direct strcmp() since this is |
| 270 | * unlikely used. |
| 271 | */ |
| 272 | if (strcmp(ptr->domainname->name, |
| 273 | last_name)) |
| 274 | continue; |
| 275 | } |
| 276 | } |
| 277 | if (ptr->program && |
| 278 | tomoyo_pathcmp(ptr->program, program)) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 279 | continue; |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 280 | if (type == TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE) { |
| 281 | /* |
| 282 | * Do not check for initialize_domain if |
| 283 | * no_initialize_domain matched. |
| 284 | */ |
| 285 | type = TOMOYO_TRANSITION_CONTROL_NO_KEEP; |
| 286 | goto next; |
| 287 | } |
| 288 | goto done; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 289 | } |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 290 | } |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 291 | done: |
| 292 | return type; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 293 | } |
| 294 | |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 295 | /** |
| 296 | * tomoyo_same_aggregator - Check for duplicated "struct tomoyo_aggregator" entry. |
| 297 | * |
| 298 | * @a: Pointer to "struct tomoyo_acl_head". |
| 299 | * @b: Pointer to "struct tomoyo_acl_head". |
| 300 | * |
| 301 | * Returns true if @a == @b, false otherwise. |
| 302 | */ |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 303 | static bool tomoyo_same_aggregator(const struct tomoyo_acl_head *a, |
| 304 | const struct tomoyo_acl_head *b) |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 305 | { |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 306 | const struct tomoyo_aggregator *p1 = container_of(a, typeof(*p1), |
| 307 | head); |
| 308 | const struct tomoyo_aggregator *p2 = container_of(b, typeof(*p2), |
| 309 | head); |
Tetsuo Handa | 36f5e1f | 2010-06-15 09:23:26 +0900 | [diff] [blame] | 310 | return p1->original_name == p2->original_name && |
| 311 | p1->aggregated_name == p2->aggregated_name; |
| 312 | } |
| 313 | |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 314 | /** |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 315 | * tomoyo_write_aggregator - Write "struct tomoyo_aggregator" list. |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 316 | * |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 317 | * @param: Pointer to "struct tomoyo_acl_param". |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 318 | * |
| 319 | * Returns 0 on success, negative value otherwise. |
| 320 | * |
| 321 | * Caller holds tomoyo_read_lock(). |
| 322 | */ |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 323 | int tomoyo_write_aggregator(struct tomoyo_acl_param *param) |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 324 | { |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 325 | struct tomoyo_aggregator e = { }; |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 326 | int error = param->is_delete ? -ENOENT : -ENOMEM; |
| 327 | const char *original_name = tomoyo_read_token(param); |
| 328 | const char *aggregated_name = tomoyo_read_token(param); |
| 329 | if (!tomoyo_correct_word(original_name) || |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 330 | !tomoyo_correct_path(aggregated_name)) |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 331 | return -EINVAL; |
| 332 | e.original_name = tomoyo_get_name(original_name); |
| 333 | e.aggregated_name = tomoyo_get_name(aggregated_name); |
| 334 | if (!e.original_name || !e.aggregated_name || |
| 335 | e.aggregated_name->is_patterned) /* No patterns allowed. */ |
| 336 | goto out; |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 337 | param->list = &tomoyo_policy_list[TOMOYO_ID_AGGREGATOR]; |
| 338 | error = tomoyo_update_policy(&e.head, sizeof(e), param, |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 339 | tomoyo_same_aggregator); |
Tetsuo Handa | a238cf5 | 2011-06-26 23:17:10 +0900 | [diff] [blame] | 340 | out: |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 341 | tomoyo_put_name(e.original_name); |
| 342 | tomoyo_put_name(e.aggregated_name); |
| 343 | return error; |
| 344 | } |
| 345 | |
| 346 | /** |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 347 | * tomoyo_assign_domain - Create a domain. |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 348 | * |
| 349 | * @domainname: The name of domain. |
| 350 | * @profile: Profile number to assign if the domain was newly created. |
| 351 | * |
| 352 | * Returns pointer to "struct tomoyo_domain_info" on success, NULL otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 353 | * |
| 354 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 355 | */ |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 356 | struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname, |
| 357 | const u8 profile) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 358 | { |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 359 | struct tomoyo_domain_info *entry; |
Tetsuo Handa | 2928238 | 2010-05-06 00:18:15 +0900 | [diff] [blame] | 360 | struct tomoyo_domain_info *domain = NULL; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 361 | const struct tomoyo_path_info *saved_domainname; |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 362 | bool found = false; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 363 | |
Tetsuo Handa | 7509315 | 2010-06-16 16:23:55 +0900 | [diff] [blame] | 364 | if (!tomoyo_correct_domain(domainname)) |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 365 | return NULL; |
Tetsuo Handa | bf24fb0 | 2010-02-11 09:41:58 +0900 | [diff] [blame] | 366 | saved_domainname = tomoyo_get_name(domainname); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 367 | if (!saved_domainname) |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 368 | return NULL; |
Tetsuo Handa | 4e5d6f7 | 2010-04-28 14:17:42 +0900 | [diff] [blame] | 369 | entry = kzalloc(sizeof(*entry), GFP_NOFS); |
Tetsuo Handa | 2928238 | 2010-05-06 00:18:15 +0900 | [diff] [blame] | 370 | if (mutex_lock_interruptible(&tomoyo_policy_lock)) |
| 371 | goto out; |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 372 | list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) { |
| 373 | if (domain->is_deleted || |
| 374 | tomoyo_pathcmp(saved_domainname, domain->domainname)) |
| 375 | continue; |
| 376 | found = true; |
| 377 | break; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 378 | } |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 379 | if (!found && tomoyo_memory_ok(entry)) { |
| 380 | INIT_LIST_HEAD(&entry->acl_info_list); |
| 381 | entry->domainname = saved_domainname; |
Tetsuo Handa | bf24fb0 | 2010-02-11 09:41:58 +0900 | [diff] [blame] | 382 | saved_domainname = NULL; |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 383 | entry->profile = profile; |
| 384 | list_add_tail_rcu(&entry->list, &tomoyo_domain_list); |
| 385 | domain = entry; |
| 386 | entry = NULL; |
| 387 | found = true; |
| 388 | } |
Tetsuo Handa | f737d95 | 2010-01-03 21:16:32 +0900 | [diff] [blame] | 389 | mutex_unlock(&tomoyo_policy_lock); |
Tetsuo Handa | 2928238 | 2010-05-06 00:18:15 +0900 | [diff] [blame] | 390 | out: |
Tetsuo Handa | bf24fb0 | 2010-02-11 09:41:58 +0900 | [diff] [blame] | 391 | tomoyo_put_name(saved_domainname); |
Tetsuo Handa | ca0b7df | 2010-02-07 20:23:59 +0900 | [diff] [blame] | 392 | kfree(entry); |
| 393 | return found ? domain : NULL; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 394 | } |
| 395 | |
| 396 | /** |
| 397 | * tomoyo_find_next_domain - Find a domain. |
| 398 | * |
Tetsuo Handa | 56f8c9bc | 2009-06-19 14:13:27 +0900 | [diff] [blame] | 399 | * @bprm: Pointer to "struct linux_binprm". |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 400 | * |
| 401 | * Returns 0 on success, negative value otherwise. |
Tetsuo Handa | fdb8ebb | 2009-12-08 09:34:43 +0900 | [diff] [blame] | 402 | * |
| 403 | * Caller holds tomoyo_read_lock(). |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 404 | */ |
Tetsuo Handa | 56f8c9bc | 2009-06-19 14:13:27 +0900 | [diff] [blame] | 405 | int tomoyo_find_next_domain(struct linux_binprm *bprm) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 406 | { |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 407 | struct tomoyo_request_info r; |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 408 | char *tmp = kzalloc(TOMOYO_EXEC_TMPSIZE, GFP_NOFS); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 409 | struct tomoyo_domain_info *old_domain = tomoyo_domain(); |
| 410 | struct tomoyo_domain_info *domain = NULL; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 411 | const char *original_name = bprm->filename; |
Tetsuo Handa | 57c2590 | 2010-06-03 20:38:44 +0900 | [diff] [blame] | 412 | u8 mode; |
| 413 | bool is_enforce; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 414 | int retval = -ENOMEM; |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 415 | bool need_kfree = false; |
| 416 | struct tomoyo_path_info rn = { }; /* real name */ |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 417 | |
Tetsuo Handa | 57c2590 | 2010-06-03 20:38:44 +0900 | [diff] [blame] | 418 | mode = tomoyo_init_request_info(&r, NULL, TOMOYO_MAC_FILE_EXECUTE); |
| 419 | is_enforce = (mode == TOMOYO_CONFIG_ENFORCING); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 420 | if (!tmp) |
| 421 | goto out; |
| 422 | |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 423 | retry: |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 424 | if (need_kfree) { |
| 425 | kfree(rn.name); |
| 426 | need_kfree = false; |
| 427 | } |
Tetsuo Handa | 0617c7f | 2010-06-21 09:58:53 +0900 | [diff] [blame] | 428 | /* Get symlink's pathname of program. */ |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 429 | retval = -ENOENT; |
Tetsuo Handa | 0617c7f | 2010-06-21 09:58:53 +0900 | [diff] [blame] | 430 | rn.name = tomoyo_realpath_nofollow(original_name); |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 431 | if (!rn.name) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 432 | goto out; |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 433 | tomoyo_fill_path_info(&rn); |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 434 | need_kfree = true; |
| 435 | |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 436 | /* Check 'aggregator' directive. */ |
| 437 | { |
Tetsuo Handa | e2bf690 | 2010-06-25 11:16:00 +0900 | [diff] [blame] | 438 | struct tomoyo_aggregator *ptr; |
Tetsuo Handa | a230f9e | 2010-06-17 16:53:24 +0900 | [diff] [blame] | 439 | list_for_each_entry_rcu(ptr, &tomoyo_policy_list |
| 440 | [TOMOYO_ID_AGGREGATOR], head.list) { |
Tetsuo Handa | 82e0f00 | 2010-06-15 09:22:42 +0900 | [diff] [blame] | 441 | if (ptr->head.is_deleted || |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 442 | !tomoyo_path_matches_pattern(&rn, |
| 443 | ptr->original_name)) |
| 444 | continue; |
Tetsuo Handa | 0617c7f | 2010-06-21 09:58:53 +0900 | [diff] [blame] | 445 | kfree(rn.name); |
Tetsuo Handa | 1084307 | 2010-06-03 20:38:03 +0900 | [diff] [blame] | 446 | need_kfree = false; |
| 447 | /* This is OK because it is read only. */ |
| 448 | rn = *ptr->aggregated_name; |
| 449 | break; |
| 450 | } |
| 451 | } |
| 452 | |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 453 | /* Check execute permission. */ |
Tetsuo Handa | 05336de | 2010-06-16 16:20:24 +0900 | [diff] [blame] | 454 | retval = tomoyo_path_permission(&r, TOMOYO_TYPE_EXECUTE, &rn); |
Tetsuo Handa | 17fcfbd | 2010-05-17 10:11:36 +0900 | [diff] [blame] | 455 | if (retval == TOMOYO_RETRY_REQUEST) |
| 456 | goto retry; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 457 | if (retval < 0) |
| 458 | goto out; |
Tetsuo Handa | 484ca79 | 2010-07-29 14:29:55 +0900 | [diff] [blame] | 459 | /* |
| 460 | * To be able to specify domainnames with wildcards, use the |
| 461 | * pathname specified in the policy (which may contain |
| 462 | * wildcard) rather than the pathname passed to execve() |
| 463 | * (which never contains wildcard). |
| 464 | */ |
| 465 | if (r.param.path.matched_path) { |
| 466 | if (need_kfree) |
| 467 | kfree(rn.name); |
| 468 | need_kfree = false; |
| 469 | /* This is OK because it is read only. */ |
| 470 | rn = *r.param.path.matched_path; |
| 471 | } |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 472 | |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 473 | /* Calculate domain to transit to. */ |
| 474 | switch (tomoyo_transition_type(old_domain->domainname, &rn)) { |
| 475 | case TOMOYO_TRANSITION_CONTROL_INITIALIZE: |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 476 | /* Transit to the child of tomoyo_kernel_domain domain. */ |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 477 | snprintf(tmp, TOMOYO_EXEC_TMPSIZE - 1, TOMOYO_ROOT_NAME " " |
| 478 | "%s", rn.name); |
| 479 | break; |
| 480 | case TOMOYO_TRANSITION_CONTROL_KEEP: |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 481 | /* Keep current domain. */ |
| 482 | domain = old_domain; |
Tetsuo Handa | 5448ec4 | 2010-06-21 11:14:39 +0900 | [diff] [blame] | 483 | break; |
| 484 | default: |
| 485 | if (old_domain == &tomoyo_kernel_domain && |
| 486 | !tomoyo_policy_loaded) { |
| 487 | /* |
| 488 | * Needn't to transit from kernel domain before |
| 489 | * starting /sbin/init. But transit from kernel domain |
| 490 | * if executing initializers because they might start |
| 491 | * before /sbin/init. |
| 492 | */ |
| 493 | domain = old_domain; |
| 494 | } else { |
| 495 | /* Normal domain transition. */ |
| 496 | snprintf(tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s", |
| 497 | old_domain->domainname->name, rn.name); |
| 498 | } |
| 499 | break; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 500 | } |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 501 | if (domain || strlen(tmp) >= TOMOYO_EXEC_TMPSIZE - 10) |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 502 | goto done; |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 503 | domain = tomoyo_find_domain(tmp); |
Tetsuo Handa | 7c75964 | 2011-06-26 23:15:31 +0900 | [diff] [blame] | 504 | if (!domain) |
| 505 | domain = tomoyo_assign_domain(tmp, old_domain->profile); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 506 | done: |
| 507 | if (domain) |
| 508 | goto out; |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 509 | printk(KERN_WARNING "TOMOYO-ERROR: Domain '%s' not defined.\n", tmp); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 510 | if (is_enforce) |
| 511 | retval = -EPERM; |
| 512 | else |
Tetsuo Handa | ea13ddb | 2010-02-03 06:43:06 +0900 | [diff] [blame] | 513 | old_domain->transition_failed = true; |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 514 | out: |
Tetsuo Handa | 56f8c9bc | 2009-06-19 14:13:27 +0900 | [diff] [blame] | 515 | if (!domain) |
| 516 | domain = old_domain; |
Tetsuo Handa | ec8e6a4 | 2010-02-11 09:43:20 +0900 | [diff] [blame] | 517 | /* Update reference count on "struct tomoyo_domain_info". */ |
| 518 | atomic_inc(&domain->users); |
Tetsuo Handa | 56f8c9bc | 2009-06-19 14:13:27 +0900 | [diff] [blame] | 519 | bprm->cred->security = domain; |
Tetsuo Handa | c8c57e8 | 2010-06-03 20:36:43 +0900 | [diff] [blame] | 520 | if (need_kfree) |
| 521 | kfree(rn.name); |
Tetsuo Handa | 8e2d39a | 2010-01-26 20:45:27 +0900 | [diff] [blame] | 522 | kfree(tmp); |
Kentaro Takeda | 26a2a1c | 2009-02-05 17:18:15 +0900 | [diff] [blame] | 523 | return retval; |
| 524 | } |