2 * security/tomoyo/common.c
4 * Common functions for TOMOYO.
6 * Copyright (C) 2005-2010 NTT DATA CORPORATION
9 #include <linux/uaccess.h>
10 #include <linux/slab.h>
11 #include <linux/security.h>
14 static struct tomoyo_profile tomoyo_default_profile
= {
15 .learning
= &tomoyo_default_profile
.preference
,
16 .permissive
= &tomoyo_default_profile
.preference
,
17 .enforcing
= &tomoyo_default_profile
.preference
,
18 .preference
.enforcing_verbose
= true,
19 .preference
.learning_max_entry
= 2048,
20 .preference
.learning_verbose
= false,
21 .preference
.permissive_verbose
= true
24 /* Profile version. Currently only 20090903 is defined. */
25 static unsigned int tomoyo_profile_version
;
27 /* Profile table. Memory is allocated as needed. */
28 static struct tomoyo_profile
*tomoyo_profile_ptr
[TOMOYO_MAX_PROFILES
];
30 /* String table for functionality that takes 4 modes. */
31 static const char *tomoyo_mode_4
[4] = {
32 "disabled", "learning", "permissive", "enforcing"
35 /* String table for /sys/kernel/security/tomoyo/profile */
36 static const char *tomoyo_mac_keywords
[TOMOYO_MAX_MAC_INDEX
37 + TOMOYO_MAX_MAC_CATEGORY_INDEX
] = {
38 [TOMOYO_MAC_FILE_EXECUTE
] = "file::execute",
39 [TOMOYO_MAC_FILE_OPEN
] = "file::open",
40 [TOMOYO_MAC_FILE_CREATE
] = "file::create",
41 [TOMOYO_MAC_FILE_UNLINK
] = "file::unlink",
42 [TOMOYO_MAC_FILE_MKDIR
] = "file::mkdir",
43 [TOMOYO_MAC_FILE_RMDIR
] = "file::rmdir",
44 [TOMOYO_MAC_FILE_MKFIFO
] = "file::mkfifo",
45 [TOMOYO_MAC_FILE_MKSOCK
] = "file::mksock",
46 [TOMOYO_MAC_FILE_TRUNCATE
] = "file::truncate",
47 [TOMOYO_MAC_FILE_SYMLINK
] = "file::symlink",
48 [TOMOYO_MAC_FILE_REWRITE
] = "file::rewrite",
49 [TOMOYO_MAC_FILE_MKBLOCK
] = "file::mkblock",
50 [TOMOYO_MAC_FILE_MKCHAR
] = "file::mkchar",
51 [TOMOYO_MAC_FILE_LINK
] = "file::link",
52 [TOMOYO_MAC_FILE_RENAME
] = "file::rename",
53 [TOMOYO_MAC_FILE_CHMOD
] = "file::chmod",
54 [TOMOYO_MAC_FILE_CHOWN
] = "file::chown",
55 [TOMOYO_MAC_FILE_CHGRP
] = "file::chgrp",
56 [TOMOYO_MAC_FILE_IOCTL
] = "file::ioctl",
57 [TOMOYO_MAC_FILE_CHROOT
] = "file::chroot",
58 [TOMOYO_MAC_FILE_MOUNT
] = "file::mount",
59 [TOMOYO_MAC_FILE_UMOUNT
] = "file::umount",
60 [TOMOYO_MAC_FILE_PIVOT_ROOT
] = "file::pivot_root",
61 [TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAC_CATEGORY_FILE
] = "file",
64 /* Permit policy management by non-root user? */
65 static bool tomoyo_manage_by_non_root
;
67 /* Utility functions. */
70 * tomoyo_yesno - Return "yes" or "no".
74 static const char *tomoyo_yesno(const unsigned int value
)
76 return value
? "yes" : "no";
80 * tomoyo_print_name_union - Print a tomoyo_name_union.
82 * @head: Pointer to "struct tomoyo_io_buffer".
83 * @ptr: Pointer to "struct tomoyo_name_union".
85 * Returns true on success, false otherwise.
87 static bool tomoyo_print_name_union(struct tomoyo_io_buffer
*head
,
88 const struct tomoyo_name_union
*ptr
)
90 int pos
= head
->read_avail
;
91 if (pos
&& head
->read_buf
[pos
- 1] == ' ')
94 return tomoyo_io_printf(head
, " @%s",
95 ptr
->group
->group_name
->name
);
96 return tomoyo_io_printf(head
, " %s", ptr
->filename
->name
);
100 * tomoyo_print_number_union - Print a tomoyo_number_union.
102 * @head: Pointer to "struct tomoyo_io_buffer".
103 * @ptr: Pointer to "struct tomoyo_number_union".
105 * Returns true on success, false otherwise.
107 bool tomoyo_print_number_union(struct tomoyo_io_buffer
*head
,
108 const struct tomoyo_number_union
*ptr
)
114 if (!tomoyo_io_printf(head
, " "))
117 return tomoyo_io_printf(head
, "@%s",
118 ptr
->group
->group_name
->name
);
119 min_type
= ptr
->min_type
;
120 max_type
= ptr
->max_type
;
121 min
= ptr
->values
[0];
122 max
= ptr
->values
[1];
124 case TOMOYO_VALUE_TYPE_HEXADECIMAL
:
125 if (!tomoyo_io_printf(head
, "0x%lX", min
))
128 case TOMOYO_VALUE_TYPE_OCTAL
:
129 if (!tomoyo_io_printf(head
, "0%lo", min
))
133 if (!tomoyo_io_printf(head
, "%lu", min
))
137 if (min
== max
&& min_type
== max_type
)
140 case TOMOYO_VALUE_TYPE_HEXADECIMAL
:
141 return tomoyo_io_printf(head
, "-0x%lX", max
);
142 case TOMOYO_VALUE_TYPE_OCTAL
:
143 return tomoyo_io_printf(head
, "-0%lo", max
);
145 return tomoyo_io_printf(head
, "-%lu", max
);
150 * tomoyo_io_printf - Transactional printf() to "struct tomoyo_io_buffer" structure.
152 * @head: Pointer to "struct tomoyo_io_buffer".
153 * @fmt: The printf()'s format string, followed by parameters.
155 * Returns true if output was written, false otherwise.
157 * The snprintf() will truncate, but tomoyo_io_printf() won't.
159 bool tomoyo_io_printf(struct tomoyo_io_buffer
*head
, const char *fmt
, ...)
163 int pos
= head
->read_avail
;
164 int size
= head
->readbuf_size
- pos
;
169 len
= vsnprintf(head
->read_buf
+ pos
, size
, fmt
, args
);
171 if (pos
+ len
>= head
->readbuf_size
)
173 head
->read_avail
+= len
;
178 * tomoyo_find_or_assign_new_profile - Create a new profile.
180 * @profile: Profile number to create.
182 * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
184 static struct tomoyo_profile
*tomoyo_find_or_assign_new_profile
185 (const unsigned int profile
)
187 struct tomoyo_profile
*ptr
;
188 struct tomoyo_profile
*entry
;
189 if (profile
>= TOMOYO_MAX_PROFILES
)
191 ptr
= tomoyo_profile_ptr
[profile
];
194 entry
= kzalloc(sizeof(*entry
), GFP_NOFS
);
195 if (mutex_lock_interruptible(&tomoyo_policy_lock
))
197 ptr
= tomoyo_profile_ptr
[profile
];
198 if (!ptr
&& tomoyo_memory_ok(entry
)) {
200 ptr
->learning
= &tomoyo_default_profile
.preference
;
201 ptr
->permissive
= &tomoyo_default_profile
.preference
;
202 ptr
->enforcing
= &tomoyo_default_profile
.preference
;
203 ptr
->default_config
= TOMOYO_CONFIG_DISABLED
;
204 memset(ptr
->config
, TOMOYO_CONFIG_USE_DEFAULT
,
205 sizeof(ptr
->config
));
206 mb(); /* Avoid out-of-order execution. */
207 tomoyo_profile_ptr
[profile
] = ptr
;
210 mutex_unlock(&tomoyo_policy_lock
);
217 * tomoyo_profile - Find a profile.
219 * @profile: Profile number to find.
221 * Returns pointer to "struct tomoyo_profile".
223 struct tomoyo_profile
*tomoyo_profile(const u8 profile
)
225 struct tomoyo_profile
*ptr
= tomoyo_profile_ptr
[profile
];
226 if (!tomoyo_policy_loaded
)
227 return &tomoyo_default_profile
;
233 * tomoyo_write_profile - Write profile table.
235 * @head: Pointer to "struct tomoyo_io_buffer".
237 * Returns 0 on success, negative value otherwise.
239 static int tomoyo_write_profile(struct tomoyo_io_buffer
*head
)
241 char *data
= head
->write_buf
;
246 bool use_default
= false;
248 struct tomoyo_profile
*profile
;
249 if (sscanf(data
, "PROFILE_VERSION=%u", &tomoyo_profile_version
) == 1)
251 i
= simple_strtoul(data
, &cp
, 10);
253 profile
= &tomoyo_default_profile
;
258 profile
= tomoyo_find_or_assign_new_profile(i
);
262 cp
= strchr(data
, '=');
266 if (profile
!= &tomoyo_default_profile
)
267 use_default
= strstr(cp
, "use_default") != NULL
;
268 if (strstr(cp
, "verbose=yes"))
270 else if (strstr(cp
, "verbose=no"))
274 if (!strcmp(data
, "PREFERENCE::enforcing")) {
276 profile
->enforcing
= &tomoyo_default_profile
.preference
;
279 profile
->enforcing
= &profile
->preference
;
281 profile
->preference
.enforcing_verbose
= value
;
284 if (!strcmp(data
, "PREFERENCE::permissive")) {
286 profile
->permissive
= &tomoyo_default_profile
.preference
;
289 profile
->permissive
= &profile
->preference
;
291 profile
->preference
.permissive_verbose
= value
;
294 if (!strcmp(data
, "PREFERENCE::learning")) {
297 profile
->learning
= &tomoyo_default_profile
.preference
;
300 profile
->learning
= &profile
->preference
;
302 profile
->preference
.learning_verbose
= value
;
303 cp2
= strstr(cp
, "max_entry=");
305 sscanf(cp2
+ 10, "%u",
306 &profile
->preference
.learning_max_entry
);
309 if (profile
== &tomoyo_default_profile
)
311 if (!strcmp(data
, "COMMENT")) {
312 const struct tomoyo_path_info
*old_comment
= profile
->comment
;
313 profile
->comment
= tomoyo_get_name(cp
);
314 tomoyo_put_name(old_comment
);
317 if (!strcmp(data
, "CONFIG")) {
318 i
= TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
;
319 config
= profile
->default_config
;
320 } else if (tomoyo_str_starts(&data
, "CONFIG::")) {
322 for (i
= 0; i
< TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
; i
++) {
323 if (strcmp(data
, tomoyo_mac_keywords
[i
]))
325 config
= profile
->config
[i
];
328 if (i
== TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
)
334 config
= TOMOYO_CONFIG_USE_DEFAULT
;
336 for (mode
= 3; mode
>= 0; mode
--)
337 if (strstr(cp
, tomoyo_mode_4
[mode
]))
339 * Update lower 3 bits in order to distinguish
340 * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
342 config
= (config
& ~7) | mode
;
344 if (i
< TOMOYO_MAX_MAC_INDEX
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
)
345 profile
->config
[i
] = config
;
346 else if (config
!= TOMOYO_CONFIG_USE_DEFAULT
)
347 profile
->default_config
= config
;
352 * tomoyo_read_profile - Read profile table.
354 * @head: Pointer to "struct tomoyo_io_buffer".
356 static void tomoyo_read_profile(struct tomoyo_io_buffer
*head
)
363 tomoyo_io_printf(head
, "PROFILE_VERSION=%s\n", "20090903");
364 tomoyo_io_printf(head
, "PREFERENCE::learning={ verbose=%s "
366 tomoyo_yesno(tomoyo_default_profile
.preference
.
368 tomoyo_default_profile
.preference
.learning_max_entry
);
369 tomoyo_io_printf(head
, "PREFERENCE::permissive={ verbose=%s }\n",
370 tomoyo_yesno(tomoyo_default_profile
.preference
.
371 permissive_verbose
));
372 tomoyo_io_printf(head
, "PREFERENCE::enforcing={ verbose=%s }\n",
373 tomoyo_yesno(tomoyo_default_profile
.preference
.
377 for (index
= head
->read_step
; index
< TOMOYO_MAX_PROFILES
; index
++) {
382 const struct tomoyo_profile
*profile
383 = tomoyo_profile_ptr
[index
];
384 const struct tomoyo_path_info
*comment
;
385 head
->read_step
= index
;
388 pos
= head
->read_avail
;
389 comment
= profile
->comment
;
390 done
= tomoyo_io_printf(head
, "%u-COMMENT=%s\n", index
,
391 comment
? comment
->name
: "");
394 config
= profile
->default_config
;
395 if (!tomoyo_io_printf(head
, "%u-CONFIG={ mode=%s }\n", index
,
396 tomoyo_mode_4
[config
& 3]))
398 for (i
= 0; i
< TOMOYO_MAX_MAC_INDEX
+
399 TOMOYO_MAX_MAC_CATEGORY_INDEX
; i
++) {
400 config
= profile
->config
[i
];
401 if (config
== TOMOYO_CONFIG_USE_DEFAULT
)
403 if (!tomoyo_io_printf(head
,
404 "%u-CONFIG::%s={ mode=%s }\n",
405 index
, tomoyo_mac_keywords
[i
],
406 tomoyo_mode_4
[config
& 3]))
409 if (profile
->learning
!= &tomoyo_default_profile
.preference
&&
410 !tomoyo_io_printf(head
, "%u-PREFERENCE::learning={ "
411 "verbose=%s max_entry=%u }\n", index
,
412 tomoyo_yesno(profile
->preference
.
414 profile
->preference
.learning_max_entry
))
416 if (profile
->permissive
!= &tomoyo_default_profile
.preference
417 && !tomoyo_io_printf(head
, "%u-PREFERENCE::permissive={ "
418 "verbose=%s }\n", index
,
419 tomoyo_yesno(profile
->preference
.
420 permissive_verbose
)))
422 if (profile
->enforcing
!= &tomoyo_default_profile
.preference
&&
423 !tomoyo_io_printf(head
, "%u-PREFERENCE::enforcing={ "
424 "verbose=%s }\n", index
,
425 tomoyo_yesno(profile
->preference
.
430 head
->read_avail
= pos
;
433 if (index
== TOMOYO_MAX_PROFILES
)
434 head
->read_eof
= true;
437 static bool tomoyo_same_manager_entry(const struct tomoyo_acl_head
*a
,
438 const struct tomoyo_acl_head
*b
)
440 return container_of(a
, struct tomoyo_policy_manager_entry
, head
)
442 container_of(b
, struct tomoyo_policy_manager_entry
, head
)
447 * tomoyo_update_manager_entry - Add a manager entry.
449 * @manager: The path to manager or the domainnamme.
450 * @is_delete: True if it is a delete request.
452 * Returns 0 on success, negative value otherwise.
454 * Caller holds tomoyo_read_lock().
456 static int tomoyo_update_manager_entry(const char *manager
,
457 const bool is_delete
)
459 struct tomoyo_policy_manager_entry e
= { };
462 if (tomoyo_domain_def(manager
)) {
463 if (!tomoyo_correct_domain(manager
))
467 if (!tomoyo_correct_path(manager
))
470 e
.manager
= tomoyo_get_name(manager
);
473 error
= tomoyo_update_policy(&e
.head
, sizeof(e
), is_delete
,
474 &tomoyo_policy_list
[TOMOYO_ID_MANAGER
],
475 tomoyo_same_manager_entry
);
476 tomoyo_put_name(e
.manager
);
481 * tomoyo_write_manager_policy - Write manager policy.
483 * @head: Pointer to "struct tomoyo_io_buffer".
485 * Returns 0 on success, negative value otherwise.
487 * Caller holds tomoyo_read_lock().
489 static int tomoyo_write_manager_policy(struct tomoyo_io_buffer
*head
)
491 char *data
= head
->write_buf
;
492 bool is_delete
= tomoyo_str_starts(&data
, TOMOYO_KEYWORD_DELETE
);
494 if (!strcmp(data
, "manage_by_non_root")) {
495 tomoyo_manage_by_non_root
= !is_delete
;
498 return tomoyo_update_manager_entry(data
, is_delete
);
502 * tomoyo_read_manager_policy - Read manager policy.
504 * @head: Pointer to "struct tomoyo_io_buffer".
506 * Caller holds tomoyo_read_lock().
508 static void tomoyo_read_manager_policy(struct tomoyo_io_buffer
*head
)
514 list_for_each_cookie(head
->read_var2
,
515 &tomoyo_policy_list
[TOMOYO_ID_MANAGER
]) {
516 struct tomoyo_policy_manager_entry
*ptr
=
517 list_entry(head
->read_var2
, typeof(*ptr
), head
.list
);
518 if (ptr
->head
.is_deleted
)
520 done
= tomoyo_io_printf(head
, "%s\n", ptr
->manager
->name
);
524 head
->read_eof
= done
;
528 * tomoyo_policy_manager - Check whether the current process is a policy manager.
530 * Returns true if the current process is permitted to modify policy
531 * via /sys/kernel/security/tomoyo/ interface.
533 * Caller holds tomoyo_read_lock().
535 static bool tomoyo_policy_manager(void)
537 struct tomoyo_policy_manager_entry
*ptr
;
539 const struct task_struct
*task
= current
;
540 const struct tomoyo_path_info
*domainname
= tomoyo_domain()->domainname
;
543 if (!tomoyo_policy_loaded
)
545 if (!tomoyo_manage_by_non_root
&& (task
->cred
->uid
|| task
->cred
->euid
))
547 list_for_each_entry_rcu(ptr
, &tomoyo_policy_list
[TOMOYO_ID_MANAGER
],
549 if (!ptr
->head
.is_deleted
&& ptr
->is_domain
550 && !tomoyo_pathcmp(domainname
, ptr
->manager
)) {
557 exe
= tomoyo_get_exe();
560 list_for_each_entry_rcu(ptr
, &tomoyo_policy_list
[TOMOYO_ID_MANAGER
],
562 if (!ptr
->head
.is_deleted
&& !ptr
->is_domain
563 && !strcmp(exe
, ptr
->manager
->name
)) {
568 if (!found
) { /* Reduce error messages. */
569 static pid_t last_pid
;
570 const pid_t pid
= current
->pid
;
571 if (last_pid
!= pid
) {
572 printk(KERN_WARNING
"%s ( %s ) is not permitted to "
573 "update policies.\n", domainname
->name
, exe
);
582 * tomoyo_select_one - Parse select command.
584 * @head: Pointer to "struct tomoyo_io_buffer".
585 * @data: String to parse.
587 * Returns true on success, false otherwise.
589 * Caller holds tomoyo_read_lock().
591 static bool tomoyo_select_one(struct tomoyo_io_buffer
*head
, const char *data
)
594 struct tomoyo_domain_info
*domain
= NULL
;
595 bool global_pid
= false;
597 if (sscanf(data
, "pid=%u", &pid
) == 1 ||
598 (global_pid
= true, sscanf(data
, "global-pid=%u", &pid
) == 1)) {
599 struct task_struct
*p
;
601 read_lock(&tasklist_lock
);
603 p
= find_task_by_pid_ns(pid
, &init_pid_ns
);
605 p
= find_task_by_vpid(pid
);
607 domain
= tomoyo_real_domain(p
);
608 read_unlock(&tasklist_lock
);
610 } else if (!strncmp(data
, "domain=", 7)) {
611 if (tomoyo_domain_def(data
+ 7))
612 domain
= tomoyo_find_domain(data
+ 7);
615 head
->write_var1
= domain
;
616 /* Accessing read_buf is safe because head->io_sem is held. */
618 return true; /* Do nothing if open(O_WRONLY). */
619 head
->read_avail
= 0;
620 tomoyo_io_printf(head
, "# select %s\n", data
);
621 head
->read_single_domain
= true;
622 head
->read_eof
= !domain
;
623 head
->read_var1
= &domain
->list
;
624 head
->read_var2
= NULL
;
627 if (domain
&& domain
->is_deleted
)
628 tomoyo_io_printf(head
, "# This is a deleted domain.\n");
633 * tomoyo_delete_domain - Delete a domain.
635 * @domainname: The name of domain.
639 * Caller holds tomoyo_read_lock().
641 static int tomoyo_delete_domain(char *domainname
)
643 struct tomoyo_domain_info
*domain
;
644 struct tomoyo_path_info name
;
646 name
.name
= domainname
;
647 tomoyo_fill_path_info(&name
);
648 if (mutex_lock_interruptible(&tomoyo_policy_lock
))
650 /* Is there an active domain? */
651 list_for_each_entry_rcu(domain
, &tomoyo_domain_list
, list
) {
652 /* Never delete tomoyo_kernel_domain */
653 if (domain
== &tomoyo_kernel_domain
)
655 if (domain
->is_deleted
||
656 tomoyo_pathcmp(domain
->domainname
, &name
))
658 domain
->is_deleted
= true;
661 mutex_unlock(&tomoyo_policy_lock
);
666 * tomoyo_write_domain_policy2 - Write domain policy.
668 * @head: Pointer to "struct tomoyo_io_buffer".
670 * Returns 0 on success, negative value otherwise.
672 * Caller holds tomoyo_read_lock().
674 static int tomoyo_write_domain_policy2(char *data
,
675 struct tomoyo_domain_info
*domain
,
676 const bool is_delete
)
678 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_ALLOW_MOUNT
))
679 return tomoyo_write_mount_policy(data
, domain
, is_delete
);
680 return tomoyo_write_file_policy(data
, domain
, is_delete
);
684 * tomoyo_write_domain_policy - Write domain policy.
686 * @head: Pointer to "struct tomoyo_io_buffer".
688 * Returns 0 on success, negative value otherwise.
690 * Caller holds tomoyo_read_lock().
692 static int tomoyo_write_domain_policy(struct tomoyo_io_buffer
*head
)
694 char *data
= head
->write_buf
;
695 struct tomoyo_domain_info
*domain
= head
->write_var1
;
696 bool is_delete
= false;
697 bool is_select
= false;
698 unsigned int profile
;
700 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_DELETE
))
702 else if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_SELECT
))
704 if (is_select
&& tomoyo_select_one(head
, data
))
706 /* Don't allow updating policies by non manager programs. */
707 if (!tomoyo_policy_manager())
709 if (tomoyo_domain_def(data
)) {
712 tomoyo_delete_domain(data
);
714 domain
= tomoyo_find_domain(data
);
716 domain
= tomoyo_find_or_assign_new_domain(data
, 0);
717 head
->write_var1
= domain
;
723 if (sscanf(data
, TOMOYO_KEYWORD_USE_PROFILE
"%u", &profile
) == 1
724 && profile
< TOMOYO_MAX_PROFILES
) {
725 if (tomoyo_profile_ptr
[profile
] || !tomoyo_policy_loaded
)
726 domain
->profile
= (u8
) profile
;
729 if (!strcmp(data
, TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ
)) {
730 domain
->ignore_global_allow_read
= !is_delete
;
733 if (!strcmp(data
, TOMOYO_KEYWORD_QUOTA_EXCEEDED
)) {
734 domain
->quota_warned
= !is_delete
;
737 if (!strcmp(data
, TOMOYO_KEYWORD_TRANSITION_FAILED
)) {
738 domain
->transition_failed
= !is_delete
;
741 return tomoyo_write_domain_policy2(data
, domain
, is_delete
);
745 * tomoyo_print_path_acl - Print a single path ACL entry.
747 * @head: Pointer to "struct tomoyo_io_buffer".
748 * @ptr: Pointer to "struct tomoyo_path_acl".
750 * Returns true on success, false otherwise.
752 static bool tomoyo_print_path_acl(struct tomoyo_io_buffer
*head
,
753 struct tomoyo_path_acl
*ptr
)
757 const u16 perm
= ptr
->perm
;
759 for (bit
= head
->read_bit
; bit
< TOMOYO_MAX_PATH_OPERATION
; bit
++) {
760 if (!(perm
& (1 << bit
)))
762 /* Print "read/write" instead of "read" and "write". */
763 if ((bit
== TOMOYO_TYPE_READ
|| bit
== TOMOYO_TYPE_WRITE
)
764 && (perm
& (1 << TOMOYO_TYPE_READ_WRITE
)))
766 pos
= head
->read_avail
;
767 if (!tomoyo_io_printf(head
, "allow_%s ",
768 tomoyo_path_keyword
[bit
]) ||
769 !tomoyo_print_name_union(head
, &ptr
->name
) ||
770 !tomoyo_io_printf(head
, "\n"))
776 head
->read_bit
= bit
;
777 head
->read_avail
= pos
;
782 * tomoyo_print_path2_acl - Print a double path ACL entry.
784 * @head: Pointer to "struct tomoyo_io_buffer".
785 * @ptr: Pointer to "struct tomoyo_path2_acl".
787 * Returns true on success, false otherwise.
789 static bool tomoyo_print_path2_acl(struct tomoyo_io_buffer
*head
,
790 struct tomoyo_path2_acl
*ptr
)
793 const u8 perm
= ptr
->perm
;
796 for (bit
= head
->read_bit
; bit
< TOMOYO_MAX_PATH2_OPERATION
; bit
++) {
797 if (!(perm
& (1 << bit
)))
799 pos
= head
->read_avail
;
800 if (!tomoyo_io_printf(head
, "allow_%s ",
801 tomoyo_path2_keyword
[bit
]) ||
802 !tomoyo_print_name_union(head
, &ptr
->name1
) ||
803 !tomoyo_print_name_union(head
, &ptr
->name2
) ||
804 !tomoyo_io_printf(head
, "\n"))
810 head
->read_bit
= bit
;
811 head
->read_avail
= pos
;
816 * tomoyo_print_path_number_acl - Print a path_number ACL entry.
818 * @head: Pointer to "struct tomoyo_io_buffer".
819 * @ptr: Pointer to "struct tomoyo_path_number_acl".
821 * Returns true on success, false otherwise.
823 static bool tomoyo_print_path_number_acl(struct tomoyo_io_buffer
*head
,
824 struct tomoyo_path_number_acl
*ptr
)
828 const u8 perm
= ptr
->perm
;
829 for (bit
= head
->read_bit
; bit
< TOMOYO_MAX_PATH_NUMBER_OPERATION
;
831 if (!(perm
& (1 << bit
)))
833 pos
= head
->read_avail
;
834 if (!tomoyo_io_printf(head
, "allow_%s",
835 tomoyo_path_number_keyword
[bit
]) ||
836 !tomoyo_print_name_union(head
, &ptr
->name
) ||
837 !tomoyo_print_number_union(head
, &ptr
->number
) ||
838 !tomoyo_io_printf(head
, "\n"))
844 head
->read_bit
= bit
;
845 head
->read_avail
= pos
;
850 * tomoyo_print_mkdev_acl - Print a mkdev ACL entry.
852 * @head: Pointer to "struct tomoyo_io_buffer".
853 * @ptr: Pointer to "struct tomoyo_mkdev_acl".
855 * Returns true on success, false otherwise.
857 static bool tomoyo_print_mkdev_acl(struct tomoyo_io_buffer
*head
,
858 struct tomoyo_mkdev_acl
*ptr
)
862 const u16 perm
= ptr
->perm
;
863 for (bit
= head
->read_bit
; bit
< TOMOYO_MAX_MKDEV_OPERATION
;
865 if (!(perm
& (1 << bit
)))
867 pos
= head
->read_avail
;
868 if (!tomoyo_io_printf(head
, "allow_%s",
869 tomoyo_mkdev_keyword
[bit
]) ||
870 !tomoyo_print_name_union(head
, &ptr
->name
) ||
871 !tomoyo_print_number_union(head
, &ptr
->mode
) ||
872 !tomoyo_print_number_union(head
, &ptr
->major
) ||
873 !tomoyo_print_number_union(head
, &ptr
->minor
) ||
874 !tomoyo_io_printf(head
, "\n"))
880 head
->read_bit
= bit
;
881 head
->read_avail
= pos
;
886 * tomoyo_print_mount_acl - Print a mount ACL entry.
888 * @head: Pointer to "struct tomoyo_io_buffer".
889 * @ptr: Pointer to "struct tomoyo_mount_acl".
891 * Returns true on success, false otherwise.
893 static bool tomoyo_print_mount_acl(struct tomoyo_io_buffer
*head
,
894 struct tomoyo_mount_acl
*ptr
)
896 const int pos
= head
->read_avail
;
897 if (!tomoyo_io_printf(head
, TOMOYO_KEYWORD_ALLOW_MOUNT
) ||
898 !tomoyo_print_name_union(head
, &ptr
->dev_name
) ||
899 !tomoyo_print_name_union(head
, &ptr
->dir_name
) ||
900 !tomoyo_print_name_union(head
, &ptr
->fs_type
) ||
901 !tomoyo_print_number_union(head
, &ptr
->flags
) ||
902 !tomoyo_io_printf(head
, "\n")) {
903 head
->read_avail
= pos
;
910 * tomoyo_print_entry - Print an ACL entry.
912 * @head: Pointer to "struct tomoyo_io_buffer".
913 * @ptr: Pointer to an ACL entry.
915 * Returns true on success, false otherwise.
917 static bool tomoyo_print_entry(struct tomoyo_io_buffer
*head
,
918 struct tomoyo_acl_info
*ptr
)
920 const u8 acl_type
= ptr
->type
;
924 if (acl_type
== TOMOYO_TYPE_PATH_ACL
) {
925 struct tomoyo_path_acl
*acl
926 = container_of(ptr
, struct tomoyo_path_acl
, head
);
927 return tomoyo_print_path_acl(head
, acl
);
929 if (acl_type
== TOMOYO_TYPE_PATH2_ACL
) {
930 struct tomoyo_path2_acl
*acl
931 = container_of(ptr
, struct tomoyo_path2_acl
, head
);
932 return tomoyo_print_path2_acl(head
, acl
);
934 if (acl_type
== TOMOYO_TYPE_PATH_NUMBER_ACL
) {
935 struct tomoyo_path_number_acl
*acl
936 = container_of(ptr
, struct tomoyo_path_number_acl
,
938 return tomoyo_print_path_number_acl(head
, acl
);
940 if (acl_type
== TOMOYO_TYPE_MKDEV_ACL
) {
941 struct tomoyo_mkdev_acl
*acl
942 = container_of(ptr
, struct tomoyo_mkdev_acl
,
944 return tomoyo_print_mkdev_acl(head
, acl
);
946 if (acl_type
== TOMOYO_TYPE_MOUNT_ACL
) {
947 struct tomoyo_mount_acl
*acl
948 = container_of(ptr
, struct tomoyo_mount_acl
, head
);
949 return tomoyo_print_mount_acl(head
, acl
);
951 BUG(); /* This must not happen. */
956 * tomoyo_read_domain_policy - Read domain policy.
958 * @head: Pointer to "struct tomoyo_io_buffer".
960 * Caller holds tomoyo_read_lock().
962 static void tomoyo_read_domain_policy(struct tomoyo_io_buffer
*head
)
968 if (head
->read_step
== 0)
970 list_for_each_cookie(head
->read_var1
, &tomoyo_domain_list
) {
971 struct tomoyo_domain_info
*domain
=
972 list_entry(head
->read_var1
, typeof(*domain
), list
);
973 const char *quota_exceeded
= "";
974 const char *transition_failed
= "";
975 const char *ignore_global_allow_read
= "";
976 if (head
->read_step
!= 1)
978 if (domain
->is_deleted
&& !head
->read_single_domain
)
980 /* Print domainname and flags. */
981 if (domain
->quota_warned
)
982 quota_exceeded
= "quota_exceeded\n";
983 if (domain
->transition_failed
)
984 transition_failed
= "transition_failed\n";
985 if (domain
->ignore_global_allow_read
)
986 ignore_global_allow_read
987 = TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ
"\n";
988 done
= tomoyo_io_printf(head
, "%s\n" TOMOYO_KEYWORD_USE_PROFILE
990 domain
->domainname
->name
,
991 domain
->profile
, quota_exceeded
,
993 ignore_global_allow_read
);
998 if (head
->read_step
== 3)
1000 /* Print ACL entries in the domain. */
1001 list_for_each_cookie(head
->read_var2
,
1002 &domain
->acl_info_list
) {
1003 struct tomoyo_acl_info
*ptr
=
1004 list_entry(head
->read_var2
, typeof(*ptr
), list
);
1005 done
= tomoyo_print_entry(head
, ptr
);
1011 head
->read_var2
= NULL
;
1012 head
->read_step
= 3;
1014 done
= tomoyo_io_printf(head
, "\n");
1017 head
->read_step
= 1;
1018 if (head
->read_single_domain
)
1021 head
->read_eof
= done
;
1025 * tomoyo_write_domain_profile - Assign profile for specified domain.
1027 * @head: Pointer to "struct tomoyo_io_buffer".
1029 * Returns 0 on success, -EINVAL otherwise.
1031 * This is equivalent to doing
1033 * ( echo "select " $domainname; echo "use_profile " $profile ) |
1034 * /usr/sbin/tomoyo-loadpolicy -d
1036 * Caller holds tomoyo_read_lock().
1038 static int tomoyo_write_domain_profile(struct tomoyo_io_buffer
*head
)
1040 char *data
= head
->write_buf
;
1041 char *cp
= strchr(data
, ' ');
1042 struct tomoyo_domain_info
*domain
;
1043 unsigned long profile
;
1048 domain
= tomoyo_find_domain(cp
+ 1);
1049 if (strict_strtoul(data
, 10, &profile
))
1051 if (domain
&& profile
< TOMOYO_MAX_PROFILES
1052 && (tomoyo_profile_ptr
[profile
] || !tomoyo_policy_loaded
))
1053 domain
->profile
= (u8
) profile
;
1058 * tomoyo_read_domain_profile - Read only domainname and profile.
1060 * @head: Pointer to "struct tomoyo_io_buffer".
1062 * Returns list of profile number and domainname pairs.
1064 * This is equivalent to doing
1066 * grep -A 1 '^<kernel>' /sys/kernel/security/tomoyo/domain_policy |
1067 * awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" )
1068 * domainname = $0; } else if ( $1 == "use_profile" ) {
1069 * print $2 " " domainname; domainname = ""; } } ; '
1071 * Caller holds tomoyo_read_lock().
1073 static void tomoyo_read_domain_profile(struct tomoyo_io_buffer
*head
)
1079 list_for_each_cookie(head
->read_var1
, &tomoyo_domain_list
) {
1080 struct tomoyo_domain_info
*domain
=
1081 list_entry(head
->read_var1
, typeof(*domain
), list
);
1082 if (domain
->is_deleted
)
1084 done
= tomoyo_io_printf(head
, "%u %s\n", domain
->profile
,
1085 domain
->domainname
->name
);
1089 head
->read_eof
= done
;
1093 * tomoyo_write_pid: Specify PID to obtain domainname.
1095 * @head: Pointer to "struct tomoyo_io_buffer".
1099 static int tomoyo_write_pid(struct tomoyo_io_buffer
*head
)
1102 /* No error check. */
1103 strict_strtoul(head
->write_buf
, 10, &pid
);
1104 head
->read_step
= (int) pid
;
1105 head
->read_eof
= false;
1110 * tomoyo_read_pid - Get domainname of the specified PID.
1112 * @head: Pointer to "struct tomoyo_io_buffer".
1114 * Returns the domainname which the specified PID is in on success,
1115 * empty string otherwise.
1116 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1117 * using read()/write() interface rather than sysctl() interface.
1119 static void tomoyo_read_pid(struct tomoyo_io_buffer
*head
)
1121 if (head
->read_avail
== 0 && !head
->read_eof
) {
1122 const int pid
= head
->read_step
;
1123 struct task_struct
*p
;
1124 struct tomoyo_domain_info
*domain
= NULL
;
1126 read_lock(&tasklist_lock
);
1127 p
= find_task_by_vpid(pid
);
1129 domain
= tomoyo_real_domain(p
);
1130 read_unlock(&tasklist_lock
);
1133 tomoyo_io_printf(head
, "%d %u %s", pid
, domain
->profile
,
1134 domain
->domainname
->name
);
1135 head
->read_eof
= true;
1139 static const char *tomoyo_transition_type
[TOMOYO_MAX_TRANSITION_TYPE
] = {
1140 [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE
]
1141 = TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN
,
1142 [TOMOYO_TRANSITION_CONTROL_INITIALIZE
]
1143 = TOMOYO_KEYWORD_INITIALIZE_DOMAIN
,
1144 [TOMOYO_TRANSITION_CONTROL_NO_KEEP
] = TOMOYO_KEYWORD_NO_KEEP_DOMAIN
,
1145 [TOMOYO_TRANSITION_CONTROL_KEEP
] = TOMOYO_KEYWORD_KEEP_DOMAIN
1149 * tomoyo_write_exception_policy - Write exception policy.
1151 * @head: Pointer to "struct tomoyo_io_buffer".
1153 * Returns 0 on success, negative value otherwise.
1155 * Caller holds tomoyo_read_lock().
1157 static int tomoyo_write_exception_policy(struct tomoyo_io_buffer
*head
)
1159 char *data
= head
->write_buf
;
1160 bool is_delete
= tomoyo_str_starts(&data
, TOMOYO_KEYWORD_DELETE
);
1163 for (i
= 0; i
< TOMOYO_MAX_TRANSITION_TYPE
; i
++) {
1164 if (tomoyo_str_starts(&data
, tomoyo_transition_type
[i
]))
1165 return tomoyo_write_transition_control(data
, is_delete
,
1168 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_AGGREGATOR
))
1169 return tomoyo_write_aggregator_policy(data
, is_delete
);
1170 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_ALLOW_READ
))
1171 return tomoyo_write_globally_readable_policy(data
, is_delete
);
1172 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_FILE_PATTERN
))
1173 return tomoyo_write_pattern_policy(data
, is_delete
);
1174 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_DENY_REWRITE
))
1175 return tomoyo_write_no_rewrite_policy(data
, is_delete
);
1176 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_PATH_GROUP
))
1177 return tomoyo_write_group(data
, is_delete
, TOMOYO_PATH_GROUP
);
1178 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_NUMBER_GROUP
))
1179 return tomoyo_write_group(data
, is_delete
, TOMOYO_NUMBER_GROUP
);
1183 static void tomoyo_print_number(char *buffer
, int buffer_len
,
1184 const struct tomoyo_number_union
*ptr
)
1187 unsigned long min
= ptr
->values
[0];
1188 const unsigned long max
= ptr
->values
[1];
1189 u8 min_type
= ptr
->min_type
;
1190 const u8 max_type
= ptr
->max_type
;
1191 memset(buffer
, 0, buffer_len
);
1193 for (i
= 0; i
< 2; i
++) {
1196 case TOMOYO_VALUE_TYPE_HEXADECIMAL
:
1197 snprintf(buffer
, buffer_len
, "0x%lX", min
);
1199 case TOMOYO_VALUE_TYPE_OCTAL
:
1200 snprintf(buffer
, buffer_len
, "0%lo", min
);
1203 snprintf(buffer
, buffer_len
, "%lu", min
);
1206 if (min
== max
&& min_type
== max_type
)
1208 len
= strlen(buffer
);
1209 buffer
[len
++] = '-';
1212 min_type
= max_type
;
1217 static const char *tomoyo_group_name
[TOMOYO_MAX_GROUP
] = {
1218 [TOMOYO_PATH_GROUP
] = TOMOYO_KEYWORD_PATH_GROUP
,
1219 [TOMOYO_NUMBER_GROUP
] = TOMOYO_KEYWORD_NUMBER_GROUP
1223 * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group" list.
1225 * @head: Pointer to "struct tomoyo_io_buffer".
1226 * @idx: Index number.
1228 * Returns true on success, false otherwise.
1230 * Caller holds tomoyo_read_lock().
1232 static bool tomoyo_read_group(struct tomoyo_io_buffer
*head
, const int idx
)
1234 const char *w
[3] = { "", "", "" };
1235 w
[0] = tomoyo_group_name
[idx
];
1236 list_for_each_cookie(head
->read_var1
, &tomoyo_group_list
[idx
]) {
1237 struct tomoyo_group
*group
=
1238 list_entry(head
->read_var1
, typeof(*group
), list
);
1239 w
[1] = group
->group_name
->name
;
1240 list_for_each_cookie(head
->read_var2
, &group
->member_list
) {
1242 struct tomoyo_acl_head
*ptr
=
1243 list_entry(head
->read_var2
, typeof(*ptr
), list
);
1244 if (ptr
->is_deleted
)
1246 if (idx
== TOMOYO_PATH_GROUP
) {
1247 w
[2] = container_of(ptr
,
1248 struct tomoyo_path_group
,
1249 head
)->member_name
->name
;
1250 } else if (idx
== TOMOYO_NUMBER_GROUP
) {
1251 tomoyo_print_number(buffer
, sizeof(buffer
),
1254 tomoyo_number_group
,
1258 if (!tomoyo_io_printf(head
, "%s%s %s\n", w
[0], w
[1],
1262 head
->read_var2
= NULL
;
1264 head
->read_var1
= NULL
;
1269 * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
1271 * @head: Pointer to "struct tomoyo_io_buffer".
1272 * @idx: Index number.
1274 * Returns true on success, false otherwise.
1276 * Caller holds tomoyo_read_lock().
1278 static bool tomoyo_read_policy(struct tomoyo_io_buffer
*head
, const int idx
)
1280 list_for_each_cookie(head
->read_var2
, &tomoyo_policy_list
[idx
]) {
1281 const char *w
[4] = { "", "", "", "" };
1282 struct tomoyo_acl_head
*acl
=
1283 container_of(head
->read_var2
, typeof(*acl
), list
);
1284 if (acl
->is_deleted
)
1287 case TOMOYO_ID_TRANSITION_CONTROL
:
1289 struct tomoyo_transition_control
*ptr
=
1290 container_of(acl
, typeof(*ptr
), head
);
1291 w
[0] = tomoyo_transition_type
[ptr
->type
];
1293 w
[1] = ptr
->program
->name
;
1294 if (ptr
->domainname
)
1295 w
[3] = ptr
->domainname
->name
;
1296 if (w
[1][0] && w
[3][0])
1300 case TOMOYO_ID_GLOBALLY_READABLE
:
1302 struct tomoyo_globally_readable_file_entry
*ptr
1303 = container_of(acl
, typeof(*ptr
), head
);
1304 w
[0] = TOMOYO_KEYWORD_ALLOW_READ
;
1305 w
[1] = ptr
->filename
->name
;
1308 case TOMOYO_ID_AGGREGATOR
:
1310 struct tomoyo_aggregator_entry
*ptr
=
1311 container_of(acl
, typeof(*ptr
), head
);
1312 w
[0] = TOMOYO_KEYWORD_AGGREGATOR
;
1313 w
[1] = ptr
->original_name
->name
;
1315 w
[3] = ptr
->aggregated_name
->name
;
1318 case TOMOYO_ID_PATTERN
:
1320 struct tomoyo_pattern_entry
*ptr
=
1321 container_of(acl
, typeof(*ptr
), head
);
1322 w
[0] = TOMOYO_KEYWORD_FILE_PATTERN
;
1323 w
[1] = ptr
->pattern
->name
;
1326 case TOMOYO_ID_NO_REWRITE
:
1328 struct tomoyo_no_rewrite_entry
*ptr
=
1329 container_of(acl
, typeof(*ptr
), head
);
1330 w
[0] = TOMOYO_KEYWORD_DENY_REWRITE
;
1331 w
[1] = ptr
->pattern
->name
;
1337 if (!tomoyo_io_printf(head
, "%s%s%s%s\n", w
[0], w
[1], w
[2],
1341 head
->read_var2
= NULL
;
1346 * tomoyo_read_exception_policy - Read exception policy.
1348 * @head: Pointer to "struct tomoyo_io_buffer".
1350 * Caller holds tomoyo_read_lock().
1352 static void tomoyo_read_exception_policy(struct tomoyo_io_buffer
*head
)
1356 while (head
->read_step
< TOMOYO_MAX_POLICY
&&
1357 tomoyo_read_policy(head
, head
->read_step
))
1359 if (head
->read_step
< TOMOYO_MAX_POLICY
)
1361 while (head
->read_step
< TOMOYO_MAX_POLICY
+ TOMOYO_MAX_GROUP
&&
1362 tomoyo_read_group(head
, head
->read_step
- TOMOYO_MAX_POLICY
))
1364 if (head
->read_step
< TOMOYO_MAX_POLICY
+ TOMOYO_MAX_GROUP
)
1366 head
->read_eof
= true;
1370 * tomoyo_print_header - Get header line of audit log.
1372 * @r: Pointer to "struct tomoyo_request_info".
1374 * Returns string representation.
1376 * This function uses kmalloc(), so caller must kfree() if this function
1377 * didn't return NULL.
1379 static char *tomoyo_print_header(struct tomoyo_request_info
*r
)
1381 static const char *tomoyo_mode_4
[4] = {
1382 "disabled", "learning", "permissive", "enforcing"
1385 const pid_t gpid
= task_pid_nr(current
);
1386 static const int tomoyo_buffer_len
= 4096;
1387 char *buffer
= kmalloc(tomoyo_buffer_len
, GFP_NOFS
);
1390 do_gettimeofday(&tv
);
1391 snprintf(buffer
, tomoyo_buffer_len
- 1,
1392 "#timestamp=%lu profile=%u mode=%s (global-pid=%u)"
1393 " task={ pid=%u ppid=%u uid=%u gid=%u euid=%u"
1394 " egid=%u suid=%u sgid=%u fsuid=%u fsgid=%u }",
1395 tv
.tv_sec
, r
->profile
, tomoyo_mode_4
[r
->mode
], gpid
,
1396 (pid_t
) sys_getpid(), (pid_t
) sys_getppid(),
1397 current_uid(), current_gid(), current_euid(),
1398 current_egid(), current_suid(), current_sgid(),
1399 current_fsuid(), current_fsgid());
1404 * tomoyo_init_audit_log - Allocate buffer for audit logs.
1406 * @len: Required size.
1407 * @r: Pointer to "struct tomoyo_request_info".
1409 * Returns pointer to allocated memory.
1411 * The @len is updated to add the header lines' size on success.
1413 * This function uses kzalloc(), so caller must kfree() if this function
1414 * didn't return NULL.
1416 static char *tomoyo_init_audit_log(int *len
, struct tomoyo_request_info
*r
)
1420 const char *domainname
;
1422 r
->domain
= tomoyo_domain();
1423 domainname
= r
->domain
->domainname
->name
;
1424 header
= tomoyo_print_header(r
);
1427 *len
+= strlen(domainname
) + strlen(header
) + 10;
1428 buf
= kzalloc(*len
, GFP_NOFS
);
1430 snprintf(buf
, (*len
) - 1, "%s\n%s\n", header
, domainname
);
1435 /* Wait queue for tomoyo_query_list. */
1436 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait
);
1438 /* Lock for manipulating tomoyo_query_list. */
1439 static DEFINE_SPINLOCK(tomoyo_query_list_lock
);
1441 /* Structure for query. */
1442 struct tomoyo_query_entry
{
1443 struct list_head list
;
1446 unsigned int serial
;
1451 /* The list for "struct tomoyo_query_entry". */
1452 static LIST_HEAD(tomoyo_query_list
);
1455 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1458 static atomic_t tomoyo_query_observers
= ATOMIC_INIT(0);
1461 * tomoyo_supervisor - Ask for the supervisor's decision.
1463 * @r: Pointer to "struct tomoyo_request_info".
1464 * @fmt: The printf()'s format string, followed by parameters.
1466 * Returns 0 if the supervisor decided to permit the access request which
1467 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
1468 * supervisor decided to retry the access request which violated the policy in
1469 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
1471 int tomoyo_supervisor(struct tomoyo_request_info
*r
, const char *fmt
, ...)
1477 static unsigned int tomoyo_serial
;
1478 struct tomoyo_query_entry
*tomoyo_query_entry
= NULL
;
1479 bool quota_exceeded
= false;
1483 case TOMOYO_CONFIG_LEARNING
:
1484 if (!tomoyo_domain_quota_is_ok(r
))
1486 va_start(args
, fmt
);
1487 len
= vsnprintf((char *) &pos
, sizeof(pos
) - 1, fmt
, args
) + 4;
1489 buffer
= kmalloc(len
, GFP_NOFS
);
1492 va_start(args
, fmt
);
1493 vsnprintf(buffer
, len
- 1, fmt
, args
);
1495 tomoyo_normalize_line(buffer
);
1496 tomoyo_write_domain_policy2(buffer
, r
->domain
, false);
1499 case TOMOYO_CONFIG_PERMISSIVE
:
1503 r
->domain
= tomoyo_domain();
1504 if (!atomic_read(&tomoyo_query_observers
))
1506 va_start(args
, fmt
);
1507 len
= vsnprintf((char *) &pos
, sizeof(pos
) - 1, fmt
, args
) + 32;
1509 header
= tomoyo_init_audit_log(&len
, r
);
1512 tomoyo_query_entry
= kzalloc(sizeof(*tomoyo_query_entry
), GFP_NOFS
);
1513 if (!tomoyo_query_entry
)
1515 tomoyo_query_entry
->query
= kzalloc(len
, GFP_NOFS
);
1516 if (!tomoyo_query_entry
->query
)
1518 len
= ksize(tomoyo_query_entry
->query
);
1519 INIT_LIST_HEAD(&tomoyo_query_entry
->list
);
1520 spin_lock(&tomoyo_query_list_lock
);
1521 if (tomoyo_quota_for_query
&& tomoyo_query_memory_size
+ len
+
1522 sizeof(*tomoyo_query_entry
) >= tomoyo_quota_for_query
) {
1523 quota_exceeded
= true;
1525 tomoyo_query_memory_size
+= len
+ sizeof(*tomoyo_query_entry
);
1526 tomoyo_query_entry
->serial
= tomoyo_serial
++;
1528 spin_unlock(&tomoyo_query_list_lock
);
1531 pos
= snprintf(tomoyo_query_entry
->query
, len
- 1, "Q%u-%hu\n%s",
1532 tomoyo_query_entry
->serial
, r
->retry
, header
);
1535 va_start(args
, fmt
);
1536 vsnprintf(tomoyo_query_entry
->query
+ pos
, len
- 1 - pos
, fmt
, args
);
1537 tomoyo_query_entry
->query_len
= strlen(tomoyo_query_entry
->query
) + 1;
1539 spin_lock(&tomoyo_query_list_lock
);
1540 list_add_tail(&tomoyo_query_entry
->list
, &tomoyo_query_list
);
1541 spin_unlock(&tomoyo_query_list_lock
);
1542 /* Give 10 seconds for supervisor's opinion. */
1543 for (tomoyo_query_entry
->timer
= 0;
1544 atomic_read(&tomoyo_query_observers
) && tomoyo_query_entry
->timer
< 100;
1545 tomoyo_query_entry
->timer
++) {
1546 wake_up(&tomoyo_query_wait
);
1547 set_current_state(TASK_INTERRUPTIBLE
);
1548 schedule_timeout(HZ
/ 10);
1549 if (tomoyo_query_entry
->answer
)
1552 spin_lock(&tomoyo_query_list_lock
);
1553 list_del(&tomoyo_query_entry
->list
);
1554 tomoyo_query_memory_size
-= len
+ sizeof(*tomoyo_query_entry
);
1555 spin_unlock(&tomoyo_query_list_lock
);
1556 switch (tomoyo_query_entry
->answer
) {
1557 case 3: /* Asked to retry by administrator. */
1558 error
= TOMOYO_RETRY_REQUEST
;
1562 /* Granted by administrator. */
1569 /* Rejected by administrator. */
1573 if (tomoyo_query_entry
)
1574 kfree(tomoyo_query_entry
->query
);
1575 kfree(tomoyo_query_entry
);
1581 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
1583 * @file: Pointer to "struct file".
1584 * @wait: Pointer to "poll_table".
1586 * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise.
1588 * Waits for access requests which violated policy in enforcing mode.
1590 static int tomoyo_poll_query(struct file
*file
, poll_table
*wait
)
1592 struct list_head
*tmp
;
1595 for (i
= 0; i
< 2; i
++) {
1596 spin_lock(&tomoyo_query_list_lock
);
1597 list_for_each(tmp
, &tomoyo_query_list
) {
1598 struct tomoyo_query_entry
*ptr
1599 = list_entry(tmp
, struct tomoyo_query_entry
,
1606 spin_unlock(&tomoyo_query_list_lock
);
1608 return POLLIN
| POLLRDNORM
;
1611 poll_wait(file
, &tomoyo_query_wait
, wait
);
1617 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
1619 * @head: Pointer to "struct tomoyo_io_buffer".
1621 static void tomoyo_read_query(struct tomoyo_io_buffer
*head
)
1623 struct list_head
*tmp
;
1627 if (head
->read_avail
)
1629 if (head
->read_buf
) {
1630 kfree(head
->read_buf
);
1631 head
->read_buf
= NULL
;
1632 head
->readbuf_size
= 0;
1634 spin_lock(&tomoyo_query_list_lock
);
1635 list_for_each(tmp
, &tomoyo_query_list
) {
1636 struct tomoyo_query_entry
*ptr
1637 = list_entry(tmp
, struct tomoyo_query_entry
, list
);
1640 if (pos
++ != head
->read_step
)
1642 len
= ptr
->query_len
;
1645 spin_unlock(&tomoyo_query_list_lock
);
1647 head
->read_step
= 0;
1650 buf
= kzalloc(len
, GFP_NOFS
);
1654 spin_lock(&tomoyo_query_list_lock
);
1655 list_for_each(tmp
, &tomoyo_query_list
) {
1656 struct tomoyo_query_entry
*ptr
1657 = list_entry(tmp
, struct tomoyo_query_entry
, list
);
1660 if (pos
++ != head
->read_step
)
1663 * Some query can be skipped because tomoyo_query_list
1664 * can change, but I don't care.
1666 if (len
== ptr
->query_len
)
1667 memmove(buf
, ptr
->query
, len
);
1670 spin_unlock(&tomoyo_query_list_lock
);
1672 head
->read_avail
= len
;
1673 head
->readbuf_size
= head
->read_avail
;
1674 head
->read_buf
= buf
;
1682 * tomoyo_write_answer - Write the supervisor's decision.
1684 * @head: Pointer to "struct tomoyo_io_buffer".
1686 * Returns 0 on success, -EINVAL otherwise.
1688 static int tomoyo_write_answer(struct tomoyo_io_buffer
*head
)
1690 char *data
= head
->write_buf
;
1691 struct list_head
*tmp
;
1692 unsigned int serial
;
1693 unsigned int answer
;
1694 spin_lock(&tomoyo_query_list_lock
);
1695 list_for_each(tmp
, &tomoyo_query_list
) {
1696 struct tomoyo_query_entry
*ptr
1697 = list_entry(tmp
, struct tomoyo_query_entry
, list
);
1700 spin_unlock(&tomoyo_query_list_lock
);
1701 if (sscanf(data
, "A%u=%u", &serial
, &answer
) != 2)
1703 spin_lock(&tomoyo_query_list_lock
);
1704 list_for_each(tmp
, &tomoyo_query_list
) {
1705 struct tomoyo_query_entry
*ptr
1706 = list_entry(tmp
, struct tomoyo_query_entry
, list
);
1707 if (ptr
->serial
!= serial
)
1710 ptr
->answer
= answer
;
1713 spin_unlock(&tomoyo_query_list_lock
);
1718 * tomoyo_read_version: Get version.
1720 * @head: Pointer to "struct tomoyo_io_buffer".
1722 * Returns version information.
1724 static void tomoyo_read_version(struct tomoyo_io_buffer
*head
)
1726 if (!head
->read_eof
) {
1727 tomoyo_io_printf(head
, "2.3.0-pre");
1728 head
->read_eof
= true;
1733 * tomoyo_read_self_domain - Get the current process's domainname.
1735 * @head: Pointer to "struct tomoyo_io_buffer".
1737 * Returns the current process's domainname.
1739 static void tomoyo_read_self_domain(struct tomoyo_io_buffer
*head
)
1741 if (!head
->read_eof
) {
1743 * tomoyo_domain()->domainname != NULL
1744 * because every process belongs to a domain and
1745 * the domain's name cannot be NULL.
1747 tomoyo_io_printf(head
, "%s", tomoyo_domain()->domainname
->name
);
1748 head
->read_eof
= true;
1753 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
1755 * @type: Type of interface.
1756 * @file: Pointer to "struct file".
1758 * Associates policy handler and returns 0 on success, -ENOMEM otherwise.
1760 * Caller acquires tomoyo_read_lock().
1762 int tomoyo_open_control(const u8 type
, struct file
*file
)
1764 struct tomoyo_io_buffer
*head
= kzalloc(sizeof(*head
), GFP_NOFS
);
1768 mutex_init(&head
->io_sem
);
1771 case TOMOYO_DOMAINPOLICY
:
1772 /* /sys/kernel/security/tomoyo/domain_policy */
1773 head
->write
= tomoyo_write_domain_policy
;
1774 head
->read
= tomoyo_read_domain_policy
;
1776 case TOMOYO_EXCEPTIONPOLICY
:
1777 /* /sys/kernel/security/tomoyo/exception_policy */
1778 head
->write
= tomoyo_write_exception_policy
;
1779 head
->read
= tomoyo_read_exception_policy
;
1781 case TOMOYO_SELFDOMAIN
:
1782 /* /sys/kernel/security/tomoyo/self_domain */
1783 head
->read
= tomoyo_read_self_domain
;
1785 case TOMOYO_DOMAIN_STATUS
:
1786 /* /sys/kernel/security/tomoyo/.domain_status */
1787 head
->write
= tomoyo_write_domain_profile
;
1788 head
->read
= tomoyo_read_domain_profile
;
1790 case TOMOYO_PROCESS_STATUS
:
1791 /* /sys/kernel/security/tomoyo/.process_status */
1792 head
->write
= tomoyo_write_pid
;
1793 head
->read
= tomoyo_read_pid
;
1795 case TOMOYO_VERSION
:
1796 /* /sys/kernel/security/tomoyo/version */
1797 head
->read
= tomoyo_read_version
;
1798 head
->readbuf_size
= 128;
1800 case TOMOYO_MEMINFO
:
1801 /* /sys/kernel/security/tomoyo/meminfo */
1802 head
->write
= tomoyo_write_memory_quota
;
1803 head
->read
= tomoyo_read_memory_counter
;
1804 head
->readbuf_size
= 512;
1806 case TOMOYO_PROFILE
:
1807 /* /sys/kernel/security/tomoyo/profile */
1808 head
->write
= tomoyo_write_profile
;
1809 head
->read
= tomoyo_read_profile
;
1811 case TOMOYO_QUERY
: /* /sys/kernel/security/tomoyo/query */
1812 head
->poll
= tomoyo_poll_query
;
1813 head
->write
= tomoyo_write_answer
;
1814 head
->read
= tomoyo_read_query
;
1816 case TOMOYO_MANAGER
:
1817 /* /sys/kernel/security/tomoyo/manager */
1818 head
->write
= tomoyo_write_manager_policy
;
1819 head
->read
= tomoyo_read_manager_policy
;
1822 if (!(file
->f_mode
& FMODE_READ
)) {
1824 * No need to allocate read_buf since it is not opened
1829 } else if (!head
->poll
) {
1830 /* Don't allocate read_buf for poll() access. */
1831 if (!head
->readbuf_size
)
1832 head
->readbuf_size
= 4096 * 2;
1833 head
->read_buf
= kzalloc(head
->readbuf_size
, GFP_NOFS
);
1834 if (!head
->read_buf
) {
1839 if (!(file
->f_mode
& FMODE_WRITE
)) {
1841 * No need to allocate write_buf since it is not opened
1845 } else if (head
->write
) {
1846 head
->writebuf_size
= 4096 * 2;
1847 head
->write_buf
= kzalloc(head
->writebuf_size
, GFP_NOFS
);
1848 if (!head
->write_buf
) {
1849 kfree(head
->read_buf
);
1854 if (type
!= TOMOYO_QUERY
)
1855 head
->reader_idx
= tomoyo_read_lock();
1856 file
->private_data
= head
;
1858 * Call the handler now if the file is
1859 * /sys/kernel/security/tomoyo/self_domain
1860 * so that the user can use
1861 * cat < /sys/kernel/security/tomoyo/self_domain"
1862 * to know the current process's domainname.
1864 if (type
== TOMOYO_SELFDOMAIN
)
1865 tomoyo_read_control(file
, NULL
, 0);
1867 * If the file is /sys/kernel/security/tomoyo/query , increment the
1869 * The obserber counter is used by tomoyo_supervisor() to see if
1870 * there is some process monitoring /sys/kernel/security/tomoyo/query.
1872 else if (type
== TOMOYO_QUERY
)
1873 atomic_inc(&tomoyo_query_observers
);
1878 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
1880 * @file: Pointer to "struct file".
1881 * @wait: Pointer to "poll_table".
1883 * Waits for read readiness.
1884 * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd .
1886 int tomoyo_poll_control(struct file
*file
, poll_table
*wait
)
1888 struct tomoyo_io_buffer
*head
= file
->private_data
;
1891 return head
->poll(file
, wait
);
1895 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
1897 * @file: Pointer to "struct file".
1898 * @buffer: Poiner to buffer to write to.
1899 * @buffer_len: Size of @buffer.
1901 * Returns bytes read on success, negative value otherwise.
1903 * Caller holds tomoyo_read_lock().
1905 int tomoyo_read_control(struct file
*file
, char __user
*buffer
,
1906 const int buffer_len
)
1909 struct tomoyo_io_buffer
*head
= file
->private_data
;
1914 if (mutex_lock_interruptible(&head
->io_sem
))
1916 /* Call the policy handler. */
1920 /* Write to buffer. */
1921 len
= head
->read_avail
;
1922 if (len
> buffer_len
)
1926 /* head->read_buf changes by some functions. */
1927 cp
= head
->read_buf
;
1928 if (copy_to_user(buffer
, cp
, len
)) {
1932 head
->read_avail
-= len
;
1933 memmove(cp
, cp
+ len
, head
->read_avail
);
1935 mutex_unlock(&head
->io_sem
);
1940 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
1942 * @file: Pointer to "struct file".
1943 * @buffer: Pointer to buffer to read from.
1944 * @buffer_len: Size of @buffer.
1946 * Returns @buffer_len on success, negative value otherwise.
1948 * Caller holds tomoyo_read_lock().
1950 int tomoyo_write_control(struct file
*file
, const char __user
*buffer
,
1951 const int buffer_len
)
1953 struct tomoyo_io_buffer
*head
= file
->private_data
;
1954 int error
= buffer_len
;
1955 int avail_len
= buffer_len
;
1956 char *cp0
= head
->write_buf
;
1960 if (!access_ok(VERIFY_READ
, buffer
, buffer_len
))
1962 /* Don't allow updating policies by non manager programs. */
1963 if (head
->write
!= tomoyo_write_pid
&&
1964 head
->write
!= tomoyo_write_domain_policy
&&
1965 !tomoyo_policy_manager())
1967 if (mutex_lock_interruptible(&head
->io_sem
))
1969 /* Read a line and dispatch it to the policy handler. */
1970 while (avail_len
> 0) {
1972 if (head
->write_avail
>= head
->writebuf_size
- 1) {
1975 } else if (get_user(c
, buffer
)) {
1981 cp0
[head
->write_avail
++] = c
;
1984 cp0
[head
->write_avail
- 1] = '\0';
1985 head
->write_avail
= 0;
1986 tomoyo_normalize_line(cp0
);
1989 mutex_unlock(&head
->io_sem
);
1994 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
1996 * @file: Pointer to "struct file".
1998 * Releases memory and returns 0.
2000 * Caller looses tomoyo_read_lock().
2002 int tomoyo_close_control(struct file
*file
)
2004 struct tomoyo_io_buffer
*head
= file
->private_data
;
2005 const bool is_write
= !!head
->write_buf
;
2008 * If the file is /sys/kernel/security/tomoyo/query , decrement the
2011 if (head
->type
== TOMOYO_QUERY
)
2012 atomic_dec(&tomoyo_query_observers
);
2014 tomoyo_read_unlock(head
->reader_idx
);
2015 /* Release memory used for policy I/O. */
2016 kfree(head
->read_buf
);
2017 head
->read_buf
= NULL
;
2018 kfree(head
->write_buf
);
2019 head
->write_buf
= NULL
;
2022 file
->private_data
= NULL
;
2029 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
2031 void tomoyo_check_profile(void)
2033 struct tomoyo_domain_info
*domain
;
2034 const int idx
= tomoyo_read_lock();
2035 tomoyo_policy_loaded
= true;
2036 /* Check all profiles currently assigned to domains are defined. */
2037 list_for_each_entry_rcu(domain
, &tomoyo_domain_list
, list
) {
2038 const u8 profile
= domain
->profile
;
2039 if (tomoyo_profile_ptr
[profile
])
2041 panic("Profile %u (used by '%s') not defined.\n",
2042 profile
, domain
->domainname
->name
);
2044 tomoyo_read_unlock(idx
);
2045 if (tomoyo_profile_version
!= 20090903)
2046 panic("Profile version %u is not supported.\n",
2047 tomoyo_profile_version
);
2048 printk(KERN_INFO
"TOMOYO: 2.3.0-pre 2010/06/03\n");
2049 printk(KERN_INFO
"Mandatory Access Control activated.\n");