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".
358 static int tomoyo_read_profile(struct tomoyo_io_buffer
*head
)
365 tomoyo_io_printf(head
, "PROFILE_VERSION=%s\n", "20090903");
366 tomoyo_io_printf(head
, "PREFERENCE::learning={ verbose=%s "
368 tomoyo_yesno(tomoyo_default_profile
.preference
.
370 tomoyo_default_profile
.preference
.learning_max_entry
);
371 tomoyo_io_printf(head
, "PREFERENCE::permissive={ verbose=%s }\n",
372 tomoyo_yesno(tomoyo_default_profile
.preference
.
373 permissive_verbose
));
374 tomoyo_io_printf(head
, "PREFERENCE::enforcing={ verbose=%s }\n",
375 tomoyo_yesno(tomoyo_default_profile
.preference
.
379 for (index
= head
->read_step
; index
< TOMOYO_MAX_PROFILES
; index
++) {
384 const struct tomoyo_profile
*profile
385 = tomoyo_profile_ptr
[index
];
386 const struct tomoyo_path_info
*comment
;
387 head
->read_step
= index
;
390 pos
= head
->read_avail
;
391 comment
= profile
->comment
;
392 done
= tomoyo_io_printf(head
, "%u-COMMENT=%s\n", index
,
393 comment
? comment
->name
: "");
396 config
= profile
->default_config
;
397 if (!tomoyo_io_printf(head
, "%u-CONFIG={ mode=%s }\n", index
,
398 tomoyo_mode_4
[config
& 3]))
400 for (i
= 0; i
< TOMOYO_MAX_MAC_INDEX
+
401 TOMOYO_MAX_MAC_CATEGORY_INDEX
; i
++) {
402 config
= profile
->config
[i
];
403 if (config
== TOMOYO_CONFIG_USE_DEFAULT
)
405 if (!tomoyo_io_printf(head
,
406 "%u-CONFIG::%s={ mode=%s }\n",
407 index
, tomoyo_mac_keywords
[i
],
408 tomoyo_mode_4
[config
& 3]))
411 if (profile
->learning
!= &tomoyo_default_profile
.preference
&&
412 !tomoyo_io_printf(head
, "%u-PREFERENCE::learning={ "
413 "verbose=%s max_entry=%u }\n", index
,
414 tomoyo_yesno(profile
->preference
.
416 profile
->preference
.learning_max_entry
))
418 if (profile
->permissive
!= &tomoyo_default_profile
.preference
419 && !tomoyo_io_printf(head
, "%u-PREFERENCE::permissive={ "
420 "verbose=%s }\n", index
,
421 tomoyo_yesno(profile
->preference
.
422 permissive_verbose
)))
424 if (profile
->enforcing
!= &tomoyo_default_profile
.preference
&&
425 !tomoyo_io_printf(head
, "%u-PREFERENCE::enforcing={ "
426 "verbose=%s }\n", index
,
427 tomoyo_yesno(profile
->preference
.
432 head
->read_avail
= pos
;
435 if (index
== TOMOYO_MAX_PROFILES
)
436 head
->read_eof
= true;
441 * tomoyo_policy_manager_list is used for holding list of domainnames or
442 * programs which are permitted to modify configuration via
443 * /sys/kernel/security/tomoyo/ interface.
445 * An entry is added by
447 * # echo '<kernel> /sbin/mingetty /bin/login /bin/bash' > \
448 * /sys/kernel/security/tomoyo/manager
449 * (if you want to specify by a domainname)
453 * # echo '/usr/sbin/tomoyo-editpolicy' > /sys/kernel/security/tomoyo/manager
454 * (if you want to specify by a program's location)
458 * # echo 'delete <kernel> /sbin/mingetty /bin/login /bin/bash' > \
459 * /sys/kernel/security/tomoyo/manager
463 * # echo 'delete /usr/sbin/tomoyo-editpolicy' > \
464 * /sys/kernel/security/tomoyo/manager
466 * and all entries are retrieved by
468 * # cat /sys/kernel/security/tomoyo/manager
470 LIST_HEAD(tomoyo_policy_manager_list
);
472 static bool tomoyo_same_manager_entry(const struct tomoyo_acl_head
*a
,
473 const struct tomoyo_acl_head
*b
)
475 return container_of(a
, struct tomoyo_policy_manager_entry
, head
)
477 container_of(b
, struct tomoyo_policy_manager_entry
, head
)
482 * tomoyo_update_manager_entry - Add a manager entry.
484 * @manager: The path to manager or the domainnamme.
485 * @is_delete: True if it is a delete request.
487 * Returns 0 on success, negative value otherwise.
489 * Caller holds tomoyo_read_lock().
491 static int tomoyo_update_manager_entry(const char *manager
,
492 const bool is_delete
)
494 struct tomoyo_policy_manager_entry e
= { };
497 if (tomoyo_domain_def(manager
)) {
498 if (!tomoyo_correct_domain(manager
))
502 if (!tomoyo_correct_path(manager
))
505 e
.manager
= tomoyo_get_name(manager
);
508 error
= tomoyo_update_policy(&e
.head
, sizeof(e
), is_delete
,
509 &tomoyo_policy_manager_list
,
510 tomoyo_same_manager_entry
);
511 tomoyo_put_name(e
.manager
);
516 * tomoyo_write_manager_policy - Write manager policy.
518 * @head: Pointer to "struct tomoyo_io_buffer".
520 * Returns 0 on success, negative value otherwise.
522 * Caller holds tomoyo_read_lock().
524 static int tomoyo_write_manager_policy(struct tomoyo_io_buffer
*head
)
526 char *data
= head
->write_buf
;
527 bool is_delete
= tomoyo_str_starts(&data
, TOMOYO_KEYWORD_DELETE
);
529 if (!strcmp(data
, "manage_by_non_root")) {
530 tomoyo_manage_by_non_root
= !is_delete
;
533 return tomoyo_update_manager_entry(data
, is_delete
);
537 * tomoyo_read_manager_policy - Read manager policy.
539 * @head: Pointer to "struct tomoyo_io_buffer".
543 * Caller holds tomoyo_read_lock().
545 static int tomoyo_read_manager_policy(struct tomoyo_io_buffer
*head
)
547 struct list_head
*pos
;
552 list_for_each_cookie(pos
, head
->read_var2
,
553 &tomoyo_policy_manager_list
) {
554 struct tomoyo_policy_manager_entry
*ptr
;
555 ptr
= list_entry(pos
, struct tomoyo_policy_manager_entry
,
557 if (ptr
->head
.is_deleted
)
559 done
= tomoyo_io_printf(head
, "%s\n", ptr
->manager
->name
);
563 head
->read_eof
= done
;
568 * tomoyo_policy_manager - Check whether the current process is a policy manager.
570 * Returns true if the current process is permitted to modify policy
571 * via /sys/kernel/security/tomoyo/ interface.
573 * Caller holds tomoyo_read_lock().
575 static bool tomoyo_policy_manager(void)
577 struct tomoyo_policy_manager_entry
*ptr
;
579 const struct task_struct
*task
= current
;
580 const struct tomoyo_path_info
*domainname
= tomoyo_domain()->domainname
;
583 if (!tomoyo_policy_loaded
)
585 if (!tomoyo_manage_by_non_root
&& (task
->cred
->uid
|| task
->cred
->euid
))
587 list_for_each_entry_rcu(ptr
, &tomoyo_policy_manager_list
, head
.list
) {
588 if (!ptr
->head
.is_deleted
&& ptr
->is_domain
589 && !tomoyo_pathcmp(domainname
, ptr
->manager
)) {
596 exe
= tomoyo_get_exe();
599 list_for_each_entry_rcu(ptr
, &tomoyo_policy_manager_list
, head
.list
) {
600 if (!ptr
->head
.is_deleted
&& !ptr
->is_domain
601 && !strcmp(exe
, ptr
->manager
->name
)) {
606 if (!found
) { /* Reduce error messages. */
607 static pid_t last_pid
;
608 const pid_t pid
= current
->pid
;
609 if (last_pid
!= pid
) {
610 printk(KERN_WARNING
"%s ( %s ) is not permitted to "
611 "update policies.\n", domainname
->name
, exe
);
620 * tomoyo_select_one - Parse select command.
622 * @head: Pointer to "struct tomoyo_io_buffer".
623 * @data: String to parse.
625 * Returns true on success, false otherwise.
627 * Caller holds tomoyo_read_lock().
629 static bool tomoyo_select_one(struct tomoyo_io_buffer
*head
,
633 struct tomoyo_domain_info
*domain
= NULL
;
634 bool global_pid
= false;
636 if (sscanf(data
, "pid=%u", &pid
) == 1 ||
637 (global_pid
= true, sscanf(data
, "global-pid=%u", &pid
) == 1)) {
638 struct task_struct
*p
;
640 read_lock(&tasklist_lock
);
642 p
= find_task_by_pid_ns(pid
, &init_pid_ns
);
644 p
= find_task_by_vpid(pid
);
646 domain
= tomoyo_real_domain(p
);
647 read_unlock(&tasklist_lock
);
649 } else if (!strncmp(data
, "domain=", 7)) {
650 if (tomoyo_domain_def(data
+ 7))
651 domain
= tomoyo_find_domain(data
+ 7);
654 head
->write_var1
= domain
;
655 /* Accessing read_buf is safe because head->io_sem is held. */
657 return true; /* Do nothing if open(O_WRONLY). */
658 head
->read_avail
= 0;
659 tomoyo_io_printf(head
, "# select %s\n", data
);
660 head
->read_single_domain
= true;
661 head
->read_eof
= !domain
;
663 struct tomoyo_domain_info
*d
;
664 head
->read_var1
= NULL
;
665 list_for_each_entry_rcu(d
, &tomoyo_domain_list
, list
) {
668 head
->read_var1
= &d
->list
;
670 head
->read_var2
= NULL
;
673 if (domain
->is_deleted
)
674 tomoyo_io_printf(head
, "# This is a deleted domain.\n");
680 * tomoyo_delete_domain - Delete a domain.
682 * @domainname: The name of domain.
686 * Caller holds tomoyo_read_lock().
688 static int tomoyo_delete_domain(char *domainname
)
690 struct tomoyo_domain_info
*domain
;
691 struct tomoyo_path_info name
;
693 name
.name
= domainname
;
694 tomoyo_fill_path_info(&name
);
695 if (mutex_lock_interruptible(&tomoyo_policy_lock
))
697 /* Is there an active domain? */
698 list_for_each_entry_rcu(domain
, &tomoyo_domain_list
, list
) {
699 /* Never delete tomoyo_kernel_domain */
700 if (domain
== &tomoyo_kernel_domain
)
702 if (domain
->is_deleted
||
703 tomoyo_pathcmp(domain
->domainname
, &name
))
705 domain
->is_deleted
= true;
708 mutex_unlock(&tomoyo_policy_lock
);
713 * tomoyo_write_domain_policy2 - Write domain policy.
715 * @head: Pointer to "struct tomoyo_io_buffer".
717 * Returns 0 on success, negative value otherwise.
719 * Caller holds tomoyo_read_lock().
721 static int tomoyo_write_domain_policy2(char *data
,
722 struct tomoyo_domain_info
*domain
,
723 const bool is_delete
)
725 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_ALLOW_MOUNT
))
726 return tomoyo_write_mount_policy(data
, domain
, is_delete
);
727 return tomoyo_write_file_policy(data
, domain
, is_delete
);
731 * tomoyo_write_domain_policy - Write domain policy.
733 * @head: Pointer to "struct tomoyo_io_buffer".
735 * Returns 0 on success, negative value otherwise.
737 * Caller holds tomoyo_read_lock().
739 static int tomoyo_write_domain_policy(struct tomoyo_io_buffer
*head
)
741 char *data
= head
->write_buf
;
742 struct tomoyo_domain_info
*domain
= head
->write_var1
;
743 bool is_delete
= false;
744 bool is_select
= false;
745 unsigned int profile
;
747 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_DELETE
))
749 else if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_SELECT
))
751 if (is_select
&& tomoyo_select_one(head
, data
))
753 /* Don't allow updating policies by non manager programs. */
754 if (!tomoyo_policy_manager())
756 if (tomoyo_domain_def(data
)) {
759 tomoyo_delete_domain(data
);
761 domain
= tomoyo_find_domain(data
);
763 domain
= tomoyo_find_or_assign_new_domain(data
, 0);
764 head
->write_var1
= domain
;
770 if (sscanf(data
, TOMOYO_KEYWORD_USE_PROFILE
"%u", &profile
) == 1
771 && profile
< TOMOYO_MAX_PROFILES
) {
772 if (tomoyo_profile_ptr
[profile
] || !tomoyo_policy_loaded
)
773 domain
->profile
= (u8
) profile
;
776 if (!strcmp(data
, TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ
)) {
777 domain
->ignore_global_allow_read
= !is_delete
;
780 if (!strcmp(data
, TOMOYO_KEYWORD_QUOTA_EXCEEDED
)) {
781 domain
->quota_warned
= !is_delete
;
784 if (!strcmp(data
, TOMOYO_KEYWORD_TRANSITION_FAILED
)) {
785 domain
->transition_failed
= !is_delete
;
788 return tomoyo_write_domain_policy2(data
, domain
, is_delete
);
792 * tomoyo_print_path_acl - Print a single path ACL entry.
794 * @head: Pointer to "struct tomoyo_io_buffer".
795 * @ptr: Pointer to "struct tomoyo_path_acl".
797 * Returns true on success, false otherwise.
799 static bool tomoyo_print_path_acl(struct tomoyo_io_buffer
*head
,
800 struct tomoyo_path_acl
*ptr
)
804 const u16 perm
= ptr
->perm
;
806 for (bit
= head
->read_bit
; bit
< TOMOYO_MAX_PATH_OPERATION
; bit
++) {
807 if (!(perm
& (1 << bit
)))
809 /* Print "read/write" instead of "read" and "write". */
810 if ((bit
== TOMOYO_TYPE_READ
|| bit
== TOMOYO_TYPE_WRITE
)
811 && (perm
& (1 << TOMOYO_TYPE_READ_WRITE
)))
813 pos
= head
->read_avail
;
814 if (!tomoyo_io_printf(head
, "allow_%s ",
815 tomoyo_path2keyword(bit
)) ||
816 !tomoyo_print_name_union(head
, &ptr
->name
) ||
817 !tomoyo_io_printf(head
, "\n"))
823 head
->read_bit
= bit
;
824 head
->read_avail
= pos
;
829 * tomoyo_print_path2_acl - Print a double path ACL entry.
831 * @head: Pointer to "struct tomoyo_io_buffer".
832 * @ptr: Pointer to "struct tomoyo_path2_acl".
834 * Returns true on success, false otherwise.
836 static bool tomoyo_print_path2_acl(struct tomoyo_io_buffer
*head
,
837 struct tomoyo_path2_acl
*ptr
)
840 const u8 perm
= ptr
->perm
;
843 for (bit
= head
->read_bit
; bit
< TOMOYO_MAX_PATH2_OPERATION
; bit
++) {
844 if (!(perm
& (1 << bit
)))
846 pos
= head
->read_avail
;
847 if (!tomoyo_io_printf(head
, "allow_%s ",
848 tomoyo_path22keyword(bit
)) ||
849 !tomoyo_print_name_union(head
, &ptr
->name1
) ||
850 !tomoyo_print_name_union(head
, &ptr
->name2
) ||
851 !tomoyo_io_printf(head
, "\n"))
857 head
->read_bit
= bit
;
858 head
->read_avail
= pos
;
863 * tomoyo_print_path_number_acl - Print a path_number ACL entry.
865 * @head: Pointer to "struct tomoyo_io_buffer".
866 * @ptr: Pointer to "struct tomoyo_path_number_acl".
868 * Returns true on success, false otherwise.
870 static bool tomoyo_print_path_number_acl(struct tomoyo_io_buffer
*head
,
871 struct tomoyo_path_number_acl
*ptr
)
875 const u8 perm
= ptr
->perm
;
876 for (bit
= head
->read_bit
; bit
< TOMOYO_MAX_PATH_NUMBER_OPERATION
;
878 if (!(perm
& (1 << bit
)))
880 pos
= head
->read_avail
;
881 if (!tomoyo_io_printf(head
, "allow_%s",
882 tomoyo_path_number2keyword(bit
)) ||
883 !tomoyo_print_name_union(head
, &ptr
->name
) ||
884 !tomoyo_print_number_union(head
, &ptr
->number
) ||
885 !tomoyo_io_printf(head
, "\n"))
891 head
->read_bit
= bit
;
892 head
->read_avail
= pos
;
897 * tomoyo_print_mkdev_acl - Print a mkdev ACL entry.
899 * @head: Pointer to "struct tomoyo_io_buffer".
900 * @ptr: Pointer to "struct tomoyo_mkdev_acl".
902 * Returns true on success, false otherwise.
904 static bool tomoyo_print_mkdev_acl(struct tomoyo_io_buffer
*head
,
905 struct tomoyo_mkdev_acl
*ptr
)
909 const u16 perm
= ptr
->perm
;
910 for (bit
= head
->read_bit
; bit
< TOMOYO_MAX_MKDEV_OPERATION
;
912 if (!(perm
& (1 << bit
)))
914 pos
= head
->read_avail
;
915 if (!tomoyo_io_printf(head
, "allow_%s",
916 tomoyo_mkdev2keyword(bit
)) ||
917 !tomoyo_print_name_union(head
, &ptr
->name
) ||
918 !tomoyo_print_number_union(head
, &ptr
->mode
) ||
919 !tomoyo_print_number_union(head
, &ptr
->major
) ||
920 !tomoyo_print_number_union(head
, &ptr
->minor
) ||
921 !tomoyo_io_printf(head
, "\n"))
927 head
->read_bit
= bit
;
928 head
->read_avail
= pos
;
933 * tomoyo_print_mount_acl - Print a mount ACL entry.
935 * @head: Pointer to "struct tomoyo_io_buffer".
936 * @ptr: Pointer to "struct tomoyo_mount_acl".
938 * Returns true on success, false otherwise.
940 static bool tomoyo_print_mount_acl(struct tomoyo_io_buffer
*head
,
941 struct tomoyo_mount_acl
*ptr
)
943 const int pos
= head
->read_avail
;
944 if (!tomoyo_io_printf(head
, TOMOYO_KEYWORD_ALLOW_MOUNT
) ||
945 !tomoyo_print_name_union(head
, &ptr
->dev_name
) ||
946 !tomoyo_print_name_union(head
, &ptr
->dir_name
) ||
947 !tomoyo_print_name_union(head
, &ptr
->fs_type
) ||
948 !tomoyo_print_number_union(head
, &ptr
->flags
) ||
949 !tomoyo_io_printf(head
, "\n")) {
950 head
->read_avail
= pos
;
957 * tomoyo_print_entry - Print an ACL entry.
959 * @head: Pointer to "struct tomoyo_io_buffer".
960 * @ptr: Pointer to an ACL entry.
962 * Returns true on success, false otherwise.
964 static bool tomoyo_print_entry(struct tomoyo_io_buffer
*head
,
965 struct tomoyo_acl_info
*ptr
)
967 const u8 acl_type
= ptr
->type
;
971 if (acl_type
== TOMOYO_TYPE_PATH_ACL
) {
972 struct tomoyo_path_acl
*acl
973 = container_of(ptr
, struct tomoyo_path_acl
, head
);
974 return tomoyo_print_path_acl(head
, acl
);
976 if (acl_type
== TOMOYO_TYPE_PATH2_ACL
) {
977 struct tomoyo_path2_acl
*acl
978 = container_of(ptr
, struct tomoyo_path2_acl
, head
);
979 return tomoyo_print_path2_acl(head
, acl
);
981 if (acl_type
== TOMOYO_TYPE_PATH_NUMBER_ACL
) {
982 struct tomoyo_path_number_acl
*acl
983 = container_of(ptr
, struct tomoyo_path_number_acl
,
985 return tomoyo_print_path_number_acl(head
, acl
);
987 if (acl_type
== TOMOYO_TYPE_MKDEV_ACL
) {
988 struct tomoyo_mkdev_acl
*acl
989 = container_of(ptr
, struct tomoyo_mkdev_acl
,
991 return tomoyo_print_mkdev_acl(head
, acl
);
993 if (acl_type
== TOMOYO_TYPE_MOUNT_ACL
) {
994 struct tomoyo_mount_acl
*acl
995 = container_of(ptr
, struct tomoyo_mount_acl
, head
);
996 return tomoyo_print_mount_acl(head
, acl
);
998 BUG(); /* This must not happen. */
1003 * tomoyo_read_domain_policy - Read domain policy.
1005 * @head: Pointer to "struct tomoyo_io_buffer".
1009 * Caller holds tomoyo_read_lock().
1011 static int tomoyo_read_domain_policy(struct tomoyo_io_buffer
*head
)
1013 struct list_head
*dpos
;
1014 struct list_head
*apos
;
1019 if (head
->read_step
== 0)
1020 head
->read_step
= 1;
1021 list_for_each_cookie(dpos
, head
->read_var1
, &tomoyo_domain_list
) {
1022 struct tomoyo_domain_info
*domain
;
1023 const char *quota_exceeded
= "";
1024 const char *transition_failed
= "";
1025 const char *ignore_global_allow_read
= "";
1026 domain
= list_entry(dpos
, struct tomoyo_domain_info
, list
);
1027 if (head
->read_step
!= 1)
1029 if (domain
->is_deleted
&& !head
->read_single_domain
)
1031 /* Print domainname and flags. */
1032 if (domain
->quota_warned
)
1033 quota_exceeded
= "quota_exceeded\n";
1034 if (domain
->transition_failed
)
1035 transition_failed
= "transition_failed\n";
1036 if (domain
->ignore_global_allow_read
)
1037 ignore_global_allow_read
1038 = TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ
"\n";
1039 done
= tomoyo_io_printf(head
, "%s\n" TOMOYO_KEYWORD_USE_PROFILE
1041 domain
->domainname
->name
,
1042 domain
->profile
, quota_exceeded
,
1044 ignore_global_allow_read
);
1047 head
->read_step
= 2;
1049 if (head
->read_step
== 3)
1051 /* Print ACL entries in the domain. */
1052 list_for_each_cookie(apos
, head
->read_var2
,
1053 &domain
->acl_info_list
) {
1054 struct tomoyo_acl_info
*ptr
1055 = list_entry(apos
, struct tomoyo_acl_info
,
1057 done
= tomoyo_print_entry(head
, ptr
);
1063 head
->read_step
= 3;
1065 done
= tomoyo_io_printf(head
, "\n");
1068 head
->read_step
= 1;
1069 if (head
->read_single_domain
)
1072 head
->read_eof
= done
;
1077 * tomoyo_write_domain_profile - Assign profile for specified domain.
1079 * @head: Pointer to "struct tomoyo_io_buffer".
1081 * Returns 0 on success, -EINVAL otherwise.
1083 * This is equivalent to doing
1085 * ( echo "select " $domainname; echo "use_profile " $profile ) |
1086 * /usr/sbin/tomoyo-loadpolicy -d
1088 * Caller holds tomoyo_read_lock().
1090 static int tomoyo_write_domain_profile(struct tomoyo_io_buffer
*head
)
1092 char *data
= head
->write_buf
;
1093 char *cp
= strchr(data
, ' ');
1094 struct tomoyo_domain_info
*domain
;
1095 unsigned long profile
;
1100 domain
= tomoyo_find_domain(cp
+ 1);
1101 if (strict_strtoul(data
, 10, &profile
))
1103 if (domain
&& profile
< TOMOYO_MAX_PROFILES
1104 && (tomoyo_profile_ptr
[profile
] || !tomoyo_policy_loaded
))
1105 domain
->profile
= (u8
) profile
;
1110 * tomoyo_read_domain_profile - Read only domainname and profile.
1112 * @head: Pointer to "struct tomoyo_io_buffer".
1114 * Returns list of profile number and domainname pairs.
1116 * This is equivalent to doing
1118 * grep -A 1 '^<kernel>' /sys/kernel/security/tomoyo/domain_policy |
1119 * awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" )
1120 * domainname = $0; } else if ( $1 == "use_profile" ) {
1121 * print $2 " " domainname; domainname = ""; } } ; '
1123 * Caller holds tomoyo_read_lock().
1125 static int tomoyo_read_domain_profile(struct tomoyo_io_buffer
*head
)
1127 struct list_head
*pos
;
1132 list_for_each_cookie(pos
, head
->read_var1
, &tomoyo_domain_list
) {
1133 struct tomoyo_domain_info
*domain
;
1134 domain
= list_entry(pos
, struct tomoyo_domain_info
, list
);
1135 if (domain
->is_deleted
)
1137 done
= tomoyo_io_printf(head
, "%u %s\n", domain
->profile
,
1138 domain
->domainname
->name
);
1142 head
->read_eof
= done
;
1147 * tomoyo_write_pid: Specify PID to obtain domainname.
1149 * @head: Pointer to "struct tomoyo_io_buffer".
1153 static int tomoyo_write_pid(struct tomoyo_io_buffer
*head
)
1156 /* No error check. */
1157 strict_strtoul(head
->write_buf
, 10, &pid
);
1158 head
->read_step
= (int) pid
;
1159 head
->read_eof
= false;
1164 * tomoyo_read_pid - Get domainname of the specified PID.
1166 * @head: Pointer to "struct tomoyo_io_buffer".
1168 * Returns the domainname which the specified PID is in on success,
1169 * empty string otherwise.
1170 * The PID is specified by tomoyo_write_pid() so that the user can obtain
1171 * using read()/write() interface rather than sysctl() interface.
1173 static int tomoyo_read_pid(struct tomoyo_io_buffer
*head
)
1175 if (head
->read_avail
== 0 && !head
->read_eof
) {
1176 const int pid
= head
->read_step
;
1177 struct task_struct
*p
;
1178 struct tomoyo_domain_info
*domain
= NULL
;
1180 read_lock(&tasklist_lock
);
1181 p
= find_task_by_vpid(pid
);
1183 domain
= tomoyo_real_domain(p
);
1184 read_unlock(&tasklist_lock
);
1187 tomoyo_io_printf(head
, "%d %u %s", pid
, domain
->profile
,
1188 domain
->domainname
->name
);
1189 head
->read_eof
= true;
1195 * tomoyo_write_exception_policy - Write exception policy.
1197 * @head: Pointer to "struct tomoyo_io_buffer".
1199 * Returns 0 on success, negative value otherwise.
1201 * Caller holds tomoyo_read_lock().
1203 static int tomoyo_write_exception_policy(struct tomoyo_io_buffer
*head
)
1205 char *data
= head
->write_buf
;
1206 bool is_delete
= tomoyo_str_starts(&data
, TOMOYO_KEYWORD_DELETE
);
1208 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_KEEP_DOMAIN
))
1209 return tomoyo_write_domain_keeper_policy(data
, false,
1211 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_NO_KEEP_DOMAIN
))
1212 return tomoyo_write_domain_keeper_policy(data
, true, is_delete
);
1213 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_INITIALIZE_DOMAIN
))
1214 return tomoyo_write_domain_initializer_policy(data
, false,
1216 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN
))
1217 return tomoyo_write_domain_initializer_policy(data
, true,
1219 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_AGGREGATOR
))
1220 return tomoyo_write_aggregator_policy(data
, is_delete
);
1221 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_ALIAS
))
1222 return tomoyo_write_alias_policy(data
, is_delete
);
1223 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_ALLOW_READ
))
1224 return tomoyo_write_globally_readable_policy(data
, is_delete
);
1225 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_FILE_PATTERN
))
1226 return tomoyo_write_pattern_policy(data
, is_delete
);
1227 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_DENY_REWRITE
))
1228 return tomoyo_write_no_rewrite_policy(data
, is_delete
);
1229 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_PATH_GROUP
))
1230 return tomoyo_write_path_group_policy(data
, is_delete
);
1231 if (tomoyo_str_starts(&data
, TOMOYO_KEYWORD_NUMBER_GROUP
))
1232 return tomoyo_write_number_group_policy(data
, is_delete
);
1237 * tomoyo_read_exception_policy - Read exception policy.
1239 * @head: Pointer to "struct tomoyo_io_buffer".
1241 * Returns 0 on success, -EINVAL otherwise.
1243 * Caller holds tomoyo_read_lock().
1245 static int tomoyo_read_exception_policy(struct tomoyo_io_buffer
*head
)
1247 if (!head
->read_eof
) {
1248 switch (head
->read_step
) {
1250 head
->read_var2
= NULL
;
1251 head
->read_step
= 1;
1253 if (!tomoyo_read_domain_keeper_policy(head
))
1255 head
->read_var2
= NULL
;
1256 head
->read_step
= 2;
1258 if (!tomoyo_read_globally_readable_policy(head
))
1260 head
->read_var2
= NULL
;
1261 head
->read_step
= 3;
1263 head
->read_var2
= NULL
;
1264 head
->read_step
= 4;
1266 if (!tomoyo_read_domain_initializer_policy(head
))
1268 head
->read_var2
= NULL
;
1269 head
->read_step
= 5;
1271 if (!tomoyo_read_alias_policy(head
))
1273 head
->read_var2
= NULL
;
1274 head
->read_step
= 6;
1276 if (!tomoyo_read_aggregator_policy(head
))
1278 head
->read_var2
= NULL
;
1279 head
->read_step
= 7;
1281 if (!tomoyo_read_file_pattern(head
))
1283 head
->read_var2
= NULL
;
1284 head
->read_step
= 8;
1286 if (!tomoyo_read_no_rewrite_policy(head
))
1288 head
->read_var2
= NULL
;
1289 head
->read_step
= 9;
1291 if (!tomoyo_read_path_group_policy(head
))
1293 head
->read_var1
= NULL
;
1294 head
->read_var2
= NULL
;
1295 head
->read_step
= 10;
1297 if (!tomoyo_read_number_group_policy(head
))
1299 head
->read_var1
= NULL
;
1300 head
->read_var2
= NULL
;
1301 head
->read_step
= 11;
1303 head
->read_eof
= true;
1313 * tomoyo_print_header - Get header line of audit log.
1315 * @r: Pointer to "struct tomoyo_request_info".
1317 * Returns string representation.
1319 * This function uses kmalloc(), so caller must kfree() if this function
1320 * didn't return NULL.
1322 static char *tomoyo_print_header(struct tomoyo_request_info
*r
)
1324 static const char *tomoyo_mode_4
[4] = {
1325 "disabled", "learning", "permissive", "enforcing"
1328 const pid_t gpid
= task_pid_nr(current
);
1329 static const int tomoyo_buffer_len
= 4096;
1330 char *buffer
= kmalloc(tomoyo_buffer_len
, GFP_NOFS
);
1333 do_gettimeofday(&tv
);
1334 snprintf(buffer
, tomoyo_buffer_len
- 1,
1335 "#timestamp=%lu profile=%u mode=%s (global-pid=%u)"
1336 " task={ pid=%u ppid=%u uid=%u gid=%u euid=%u"
1337 " egid=%u suid=%u sgid=%u fsuid=%u fsgid=%u }",
1338 tv
.tv_sec
, r
->profile
, tomoyo_mode_4
[r
->mode
], gpid
,
1339 (pid_t
) sys_getpid(), (pid_t
) sys_getppid(),
1340 current_uid(), current_gid(), current_euid(),
1341 current_egid(), current_suid(), current_sgid(),
1342 current_fsuid(), current_fsgid());
1347 * tomoyo_init_audit_log - Allocate buffer for audit logs.
1349 * @len: Required size.
1350 * @r: Pointer to "struct tomoyo_request_info".
1352 * Returns pointer to allocated memory.
1354 * The @len is updated to add the header lines' size on success.
1356 * This function uses kzalloc(), so caller must kfree() if this function
1357 * didn't return NULL.
1359 static char *tomoyo_init_audit_log(int *len
, struct tomoyo_request_info
*r
)
1363 const char *domainname
;
1365 r
->domain
= tomoyo_domain();
1366 domainname
= r
->domain
->domainname
->name
;
1367 header
= tomoyo_print_header(r
);
1370 *len
+= strlen(domainname
) + strlen(header
) + 10;
1371 buf
= kzalloc(*len
, GFP_NOFS
);
1373 snprintf(buf
, (*len
) - 1, "%s\n%s\n", header
, domainname
);
1378 /* Wait queue for tomoyo_query_list. */
1379 static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait
);
1381 /* Lock for manipulating tomoyo_query_list. */
1382 static DEFINE_SPINLOCK(tomoyo_query_list_lock
);
1384 /* Structure for query. */
1385 struct tomoyo_query_entry
{
1386 struct list_head list
;
1389 unsigned int serial
;
1394 /* The list for "struct tomoyo_query_entry". */
1395 static LIST_HEAD(tomoyo_query_list
);
1398 * Number of "struct file" referring /sys/kernel/security/tomoyo/query
1401 static atomic_t tomoyo_query_observers
= ATOMIC_INIT(0);
1404 * tomoyo_supervisor - Ask for the supervisor's decision.
1406 * @r: Pointer to "struct tomoyo_request_info".
1407 * @fmt: The printf()'s format string, followed by parameters.
1409 * Returns 0 if the supervisor decided to permit the access request which
1410 * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
1411 * supervisor decided to retry the access request which violated the policy in
1412 * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
1414 int tomoyo_supervisor(struct tomoyo_request_info
*r
, const char *fmt
, ...)
1420 static unsigned int tomoyo_serial
;
1421 struct tomoyo_query_entry
*tomoyo_query_entry
= NULL
;
1422 bool quota_exceeded
= false;
1426 case TOMOYO_CONFIG_LEARNING
:
1427 if (!tomoyo_domain_quota_is_ok(r
))
1429 va_start(args
, fmt
);
1430 len
= vsnprintf((char *) &pos
, sizeof(pos
) - 1, fmt
, args
) + 4;
1432 buffer
= kmalloc(len
, GFP_NOFS
);
1435 va_start(args
, fmt
);
1436 vsnprintf(buffer
, len
- 1, fmt
, args
);
1438 tomoyo_normalize_line(buffer
);
1439 tomoyo_write_domain_policy2(buffer
, r
->domain
, false);
1442 case TOMOYO_CONFIG_PERMISSIVE
:
1446 r
->domain
= tomoyo_domain();
1447 if (!atomic_read(&tomoyo_query_observers
))
1449 va_start(args
, fmt
);
1450 len
= vsnprintf((char *) &pos
, sizeof(pos
) - 1, fmt
, args
) + 32;
1452 header
= tomoyo_init_audit_log(&len
, r
);
1455 tomoyo_query_entry
= kzalloc(sizeof(*tomoyo_query_entry
), GFP_NOFS
);
1456 if (!tomoyo_query_entry
)
1458 tomoyo_query_entry
->query
= kzalloc(len
, GFP_NOFS
);
1459 if (!tomoyo_query_entry
->query
)
1461 len
= ksize(tomoyo_query_entry
->query
);
1462 INIT_LIST_HEAD(&tomoyo_query_entry
->list
);
1463 spin_lock(&tomoyo_query_list_lock
);
1464 if (tomoyo_quota_for_query
&& tomoyo_query_memory_size
+ len
+
1465 sizeof(*tomoyo_query_entry
) >= tomoyo_quota_for_query
) {
1466 quota_exceeded
= true;
1468 tomoyo_query_memory_size
+= len
+ sizeof(*tomoyo_query_entry
);
1469 tomoyo_query_entry
->serial
= tomoyo_serial
++;
1471 spin_unlock(&tomoyo_query_list_lock
);
1474 pos
= snprintf(tomoyo_query_entry
->query
, len
- 1, "Q%u-%hu\n%s",
1475 tomoyo_query_entry
->serial
, r
->retry
, header
);
1478 va_start(args
, fmt
);
1479 vsnprintf(tomoyo_query_entry
->query
+ pos
, len
- 1 - pos
, fmt
, args
);
1480 tomoyo_query_entry
->query_len
= strlen(tomoyo_query_entry
->query
) + 1;
1482 spin_lock(&tomoyo_query_list_lock
);
1483 list_add_tail(&tomoyo_query_entry
->list
, &tomoyo_query_list
);
1484 spin_unlock(&tomoyo_query_list_lock
);
1485 /* Give 10 seconds for supervisor's opinion. */
1486 for (tomoyo_query_entry
->timer
= 0;
1487 atomic_read(&tomoyo_query_observers
) && tomoyo_query_entry
->timer
< 100;
1488 tomoyo_query_entry
->timer
++) {
1489 wake_up(&tomoyo_query_wait
);
1490 set_current_state(TASK_INTERRUPTIBLE
);
1491 schedule_timeout(HZ
/ 10);
1492 if (tomoyo_query_entry
->answer
)
1495 spin_lock(&tomoyo_query_list_lock
);
1496 list_del(&tomoyo_query_entry
->list
);
1497 tomoyo_query_memory_size
-= len
+ sizeof(*tomoyo_query_entry
);
1498 spin_unlock(&tomoyo_query_list_lock
);
1499 switch (tomoyo_query_entry
->answer
) {
1500 case 3: /* Asked to retry by administrator. */
1501 error
= TOMOYO_RETRY_REQUEST
;
1505 /* Granted by administrator. */
1512 /* Rejected by administrator. */
1516 if (tomoyo_query_entry
)
1517 kfree(tomoyo_query_entry
->query
);
1518 kfree(tomoyo_query_entry
);
1524 * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
1526 * @file: Pointer to "struct file".
1527 * @wait: Pointer to "poll_table".
1529 * Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise.
1531 * Waits for access requests which violated policy in enforcing mode.
1533 static int tomoyo_poll_query(struct file
*file
, poll_table
*wait
)
1535 struct list_head
*tmp
;
1538 for (i
= 0; i
< 2; i
++) {
1539 spin_lock(&tomoyo_query_list_lock
);
1540 list_for_each(tmp
, &tomoyo_query_list
) {
1541 struct tomoyo_query_entry
*ptr
1542 = list_entry(tmp
, struct tomoyo_query_entry
,
1549 spin_unlock(&tomoyo_query_list_lock
);
1551 return POLLIN
| POLLRDNORM
;
1554 poll_wait(file
, &tomoyo_query_wait
, wait
);
1560 * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
1562 * @head: Pointer to "struct tomoyo_io_buffer".
1566 static int tomoyo_read_query(struct tomoyo_io_buffer
*head
)
1568 struct list_head
*tmp
;
1572 if (head
->read_avail
)
1574 if (head
->read_buf
) {
1575 kfree(head
->read_buf
);
1576 head
->read_buf
= NULL
;
1577 head
->readbuf_size
= 0;
1579 spin_lock(&tomoyo_query_list_lock
);
1580 list_for_each(tmp
, &tomoyo_query_list
) {
1581 struct tomoyo_query_entry
*ptr
1582 = list_entry(tmp
, struct tomoyo_query_entry
, list
);
1585 if (pos
++ != head
->read_step
)
1587 len
= ptr
->query_len
;
1590 spin_unlock(&tomoyo_query_list_lock
);
1592 head
->read_step
= 0;
1595 buf
= kzalloc(len
, GFP_NOFS
);
1599 spin_lock(&tomoyo_query_list_lock
);
1600 list_for_each(tmp
, &tomoyo_query_list
) {
1601 struct tomoyo_query_entry
*ptr
1602 = list_entry(tmp
, struct tomoyo_query_entry
, list
);
1605 if (pos
++ != head
->read_step
)
1608 * Some query can be skipped because tomoyo_query_list
1609 * can change, but I don't care.
1611 if (len
== ptr
->query_len
)
1612 memmove(buf
, ptr
->query
, len
);
1615 spin_unlock(&tomoyo_query_list_lock
);
1617 head
->read_avail
= len
;
1618 head
->readbuf_size
= head
->read_avail
;
1619 head
->read_buf
= buf
;
1628 * tomoyo_write_answer - Write the supervisor's decision.
1630 * @head: Pointer to "struct tomoyo_io_buffer".
1632 * Returns 0 on success, -EINVAL otherwise.
1634 static int tomoyo_write_answer(struct tomoyo_io_buffer
*head
)
1636 char *data
= head
->write_buf
;
1637 struct list_head
*tmp
;
1638 unsigned int serial
;
1639 unsigned int answer
;
1640 spin_lock(&tomoyo_query_list_lock
);
1641 list_for_each(tmp
, &tomoyo_query_list
) {
1642 struct tomoyo_query_entry
*ptr
1643 = list_entry(tmp
, struct tomoyo_query_entry
, list
);
1646 spin_unlock(&tomoyo_query_list_lock
);
1647 if (sscanf(data
, "A%u=%u", &serial
, &answer
) != 2)
1649 spin_lock(&tomoyo_query_list_lock
);
1650 list_for_each(tmp
, &tomoyo_query_list
) {
1651 struct tomoyo_query_entry
*ptr
1652 = list_entry(tmp
, struct tomoyo_query_entry
, list
);
1653 if (ptr
->serial
!= serial
)
1656 ptr
->answer
= answer
;
1659 spin_unlock(&tomoyo_query_list_lock
);
1664 * tomoyo_read_version: Get version.
1666 * @head: Pointer to "struct tomoyo_io_buffer".
1668 * Returns version information.
1670 static int tomoyo_read_version(struct tomoyo_io_buffer
*head
)
1672 if (!head
->read_eof
) {
1673 tomoyo_io_printf(head
, "2.3.0-pre");
1674 head
->read_eof
= true;
1680 * tomoyo_read_self_domain - Get the current process's domainname.
1682 * @head: Pointer to "struct tomoyo_io_buffer".
1684 * Returns the current process's domainname.
1686 static int tomoyo_read_self_domain(struct tomoyo_io_buffer
*head
)
1688 if (!head
->read_eof
) {
1690 * tomoyo_domain()->domainname != NULL
1691 * because every process belongs to a domain and
1692 * the domain's name cannot be NULL.
1694 tomoyo_io_printf(head
, "%s", tomoyo_domain()->domainname
->name
);
1695 head
->read_eof
= true;
1701 * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
1703 * @type: Type of interface.
1704 * @file: Pointer to "struct file".
1706 * Associates policy handler and returns 0 on success, -ENOMEM otherwise.
1708 * Caller acquires tomoyo_read_lock().
1710 int tomoyo_open_control(const u8 type
, struct file
*file
)
1712 struct tomoyo_io_buffer
*head
= kzalloc(sizeof(*head
), GFP_NOFS
);
1716 mutex_init(&head
->io_sem
);
1719 case TOMOYO_DOMAINPOLICY
:
1720 /* /sys/kernel/security/tomoyo/domain_policy */
1721 head
->write
= tomoyo_write_domain_policy
;
1722 head
->read
= tomoyo_read_domain_policy
;
1724 case TOMOYO_EXCEPTIONPOLICY
:
1725 /* /sys/kernel/security/tomoyo/exception_policy */
1726 head
->write
= tomoyo_write_exception_policy
;
1727 head
->read
= tomoyo_read_exception_policy
;
1729 case TOMOYO_SELFDOMAIN
:
1730 /* /sys/kernel/security/tomoyo/self_domain */
1731 head
->read
= tomoyo_read_self_domain
;
1733 case TOMOYO_DOMAIN_STATUS
:
1734 /* /sys/kernel/security/tomoyo/.domain_status */
1735 head
->write
= tomoyo_write_domain_profile
;
1736 head
->read
= tomoyo_read_domain_profile
;
1738 case TOMOYO_PROCESS_STATUS
:
1739 /* /sys/kernel/security/tomoyo/.process_status */
1740 head
->write
= tomoyo_write_pid
;
1741 head
->read
= tomoyo_read_pid
;
1743 case TOMOYO_VERSION
:
1744 /* /sys/kernel/security/tomoyo/version */
1745 head
->read
= tomoyo_read_version
;
1746 head
->readbuf_size
= 128;
1748 case TOMOYO_MEMINFO
:
1749 /* /sys/kernel/security/tomoyo/meminfo */
1750 head
->write
= tomoyo_write_memory_quota
;
1751 head
->read
= tomoyo_read_memory_counter
;
1752 head
->readbuf_size
= 512;
1754 case TOMOYO_PROFILE
:
1755 /* /sys/kernel/security/tomoyo/profile */
1756 head
->write
= tomoyo_write_profile
;
1757 head
->read
= tomoyo_read_profile
;
1759 case TOMOYO_QUERY
: /* /sys/kernel/security/tomoyo/query */
1760 head
->poll
= tomoyo_poll_query
;
1761 head
->write
= tomoyo_write_answer
;
1762 head
->read
= tomoyo_read_query
;
1764 case TOMOYO_MANAGER
:
1765 /* /sys/kernel/security/tomoyo/manager */
1766 head
->write
= tomoyo_write_manager_policy
;
1767 head
->read
= tomoyo_read_manager_policy
;
1770 if (!(file
->f_mode
& FMODE_READ
)) {
1772 * No need to allocate read_buf since it is not opened
1777 } else if (!head
->poll
) {
1778 /* Don't allocate read_buf for poll() access. */
1779 if (!head
->readbuf_size
)
1780 head
->readbuf_size
= 4096 * 2;
1781 head
->read_buf
= kzalloc(head
->readbuf_size
, GFP_NOFS
);
1782 if (!head
->read_buf
) {
1787 if (!(file
->f_mode
& FMODE_WRITE
)) {
1789 * No need to allocate write_buf since it is not opened
1793 } else if (head
->write
) {
1794 head
->writebuf_size
= 4096 * 2;
1795 head
->write_buf
= kzalloc(head
->writebuf_size
, GFP_NOFS
);
1796 if (!head
->write_buf
) {
1797 kfree(head
->read_buf
);
1802 if (type
!= TOMOYO_QUERY
)
1803 head
->reader_idx
= tomoyo_read_lock();
1804 file
->private_data
= head
;
1806 * Call the handler now if the file is
1807 * /sys/kernel/security/tomoyo/self_domain
1808 * so that the user can use
1809 * cat < /sys/kernel/security/tomoyo/self_domain"
1810 * to know the current process's domainname.
1812 if (type
== TOMOYO_SELFDOMAIN
)
1813 tomoyo_read_control(file
, NULL
, 0);
1815 * If the file is /sys/kernel/security/tomoyo/query , increment the
1817 * The obserber counter is used by tomoyo_supervisor() to see if
1818 * there is some process monitoring /sys/kernel/security/tomoyo/query.
1820 else if (type
== TOMOYO_QUERY
)
1821 atomic_inc(&tomoyo_query_observers
);
1826 * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
1828 * @file: Pointer to "struct file".
1829 * @wait: Pointer to "poll_table".
1831 * Waits for read readiness.
1832 * /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd .
1834 int tomoyo_poll_control(struct file
*file
, poll_table
*wait
)
1836 struct tomoyo_io_buffer
*head
= file
->private_data
;
1839 return head
->poll(file
, wait
);
1843 * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
1845 * @file: Pointer to "struct file".
1846 * @buffer: Poiner to buffer to write to.
1847 * @buffer_len: Size of @buffer.
1849 * Returns bytes read on success, negative value otherwise.
1851 * Caller holds tomoyo_read_lock().
1853 int tomoyo_read_control(struct file
*file
, char __user
*buffer
,
1854 const int buffer_len
)
1857 struct tomoyo_io_buffer
*head
= file
->private_data
;
1862 if (mutex_lock_interruptible(&head
->io_sem
))
1864 /* Call the policy handler. */
1865 len
= head
->read(head
);
1868 /* Write to buffer. */
1869 len
= head
->read_avail
;
1870 if (len
> buffer_len
)
1874 /* head->read_buf changes by some functions. */
1875 cp
= head
->read_buf
;
1876 if (copy_to_user(buffer
, cp
, len
)) {
1880 head
->read_avail
-= len
;
1881 memmove(cp
, cp
+ len
, head
->read_avail
);
1883 mutex_unlock(&head
->io_sem
);
1888 * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
1890 * @file: Pointer to "struct file".
1891 * @buffer: Pointer to buffer to read from.
1892 * @buffer_len: Size of @buffer.
1894 * Returns @buffer_len on success, negative value otherwise.
1896 * Caller holds tomoyo_read_lock().
1898 int tomoyo_write_control(struct file
*file
, const char __user
*buffer
,
1899 const int buffer_len
)
1901 struct tomoyo_io_buffer
*head
= file
->private_data
;
1902 int error
= buffer_len
;
1903 int avail_len
= buffer_len
;
1904 char *cp0
= head
->write_buf
;
1908 if (!access_ok(VERIFY_READ
, buffer
, buffer_len
))
1910 /* Don't allow updating policies by non manager programs. */
1911 if (head
->write
!= tomoyo_write_pid
&&
1912 head
->write
!= tomoyo_write_domain_policy
&&
1913 !tomoyo_policy_manager())
1915 if (mutex_lock_interruptible(&head
->io_sem
))
1917 /* Read a line and dispatch it to the policy handler. */
1918 while (avail_len
> 0) {
1920 if (head
->write_avail
>= head
->writebuf_size
- 1) {
1923 } else if (get_user(c
, buffer
)) {
1929 cp0
[head
->write_avail
++] = c
;
1932 cp0
[head
->write_avail
- 1] = '\0';
1933 head
->write_avail
= 0;
1934 tomoyo_normalize_line(cp0
);
1937 mutex_unlock(&head
->io_sem
);
1942 * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
1944 * @file: Pointer to "struct file".
1946 * Releases memory and returns 0.
1948 * Caller looses tomoyo_read_lock().
1950 int tomoyo_close_control(struct file
*file
)
1952 struct tomoyo_io_buffer
*head
= file
->private_data
;
1953 const bool is_write
= !!head
->write_buf
;
1956 * If the file is /sys/kernel/security/tomoyo/query , decrement the
1959 if (head
->type
== TOMOYO_QUERY
)
1960 atomic_dec(&tomoyo_query_observers
);
1962 tomoyo_read_unlock(head
->reader_idx
);
1963 /* Release memory used for policy I/O. */
1964 kfree(head
->read_buf
);
1965 head
->read_buf
= NULL
;
1966 kfree(head
->write_buf
);
1967 head
->write_buf
= NULL
;
1970 file
->private_data
= NULL
;
1977 * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
1979 void tomoyo_check_profile(void)
1981 struct tomoyo_domain_info
*domain
;
1982 const int idx
= tomoyo_read_lock();
1983 tomoyo_policy_loaded
= true;
1984 /* Check all profiles currently assigned to domains are defined. */
1985 list_for_each_entry_rcu(domain
, &tomoyo_domain_list
, list
) {
1986 const u8 profile
= domain
->profile
;
1987 if (tomoyo_profile_ptr
[profile
])
1989 panic("Profile %u (used by '%s') not defined.\n",
1990 profile
, domain
->domainname
->name
);
1992 tomoyo_read_unlock(idx
);
1993 if (tomoyo_profile_version
!= 20090903)
1994 panic("Profile version %u is not supported.\n",
1995 tomoyo_profile_version
);
1996 printk(KERN_INFO
"TOMOYO: 2.3.0-pre 2010/06/03\n");
1997 printk(KERN_INFO
"Mandatory Access Control activated.\n");