/* The initial domain. */
struct tomoyo_domain_info tomoyo_kernel_domain;
+/**
+ * tomoyo_update_policy - Update an entry for exception policy.
+ *
+ * @new_entry: Pointer to "struct tomoyo_acl_info".
+ * @size: Size of @new_entry in bytes.
+ * @is_delete: True if it is a delete request.
+ * @list: Pointer to "struct list_head".
+ * @check_duplicate: Callback function to find duplicated entry.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
+ bool is_delete, struct list_head *list,
+ bool (*check_duplicate) (const struct tomoyo_acl_head
+ *,
+ const struct tomoyo_acl_head
+ *))
+{
+ int error = is_delete ? -ENOENT : -ENOMEM;
+ struct tomoyo_acl_head *entry;
+
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ return -ENOMEM;
+ list_for_each_entry_rcu(entry, list, list) {
+ if (!check_duplicate(entry, new_entry))
+ continue;
+ entry->is_deleted = is_delete;
+ error = 0;
+ break;
+ }
+ if (error && !is_delete) {
+ entry = tomoyo_commit_ok(new_entry, size);
+ if (entry) {
+ list_add_tail_rcu(&entry->list, list);
+ error = 0;
+ }
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+ return error;
+}
+
+/**
+ * tomoyo_update_domain - Update an entry for domain policy.
+ *
+ * @new_entry: Pointer to "struct tomoyo_acl_info".
+ * @size: Size of @new_entry in bytes.
+ * @is_delete: True if it is a delete request.
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @check_duplicate: Callback function to find duplicated entry.
+ * @merge_duplicate: Callback function to merge duplicated entry.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
+ bool is_delete, struct tomoyo_domain_info *domain,
+ bool (*check_duplicate) (const struct tomoyo_acl_info
+ *,
+ const struct tomoyo_acl_info
+ *),
+ bool (*merge_duplicate) (struct tomoyo_acl_info *,
+ struct tomoyo_acl_info *,
+ const bool))
+{
+ int error = is_delete ? -ENOENT : -ENOMEM;
+ struct tomoyo_acl_info *entry;
+
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ return error;
+ list_for_each_entry_rcu(entry, &domain->acl_info_list, list) {
+ if (!check_duplicate(entry, new_entry))
+ continue;
+ if (merge_duplicate)
+ entry->is_deleted = merge_duplicate(entry, new_entry,
+ is_delete);
+ else
+ entry->is_deleted = is_delete;
+ error = 0;
+ break;
+ }
+ if (error && !is_delete) {
+ entry = tomoyo_commit_ok(new_entry, size);
+ if (entry) {
+ list_add_tail_rcu(&entry->list, &domain->acl_info_list);
+ error = 0;
+ }
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+ return error;
+}
+
/*
* tomoyo_domain_list is used for holding list of domains.
* The ->acl_info_list of "struct tomoyo_domain_info" is used for holding
*/
LIST_HEAD(tomoyo_domain_initializer_list);
+static bool tomoyo_same_domain_initializer_entry(const struct tomoyo_acl_head *
+ a,
+ const struct tomoyo_acl_head *
+ b)
+{
+ const struct tomoyo_domain_initializer_entry *p1 =
+ container_of(a, typeof(*p1), head);
+ const struct tomoyo_domain_initializer_entry *p2 =
+ container_of(b, typeof(*p2), head);
+ return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name
+ && p1->domainname == p2->domainname
+ && p1->program == p2->program;
+}
+
/**
* tomoyo_update_domain_initializer_entry - Update "struct tomoyo_domain_initializer_entry" list.
*
const bool is_not,
const bool is_delete)
{
- struct tomoyo_domain_initializer_entry *ptr;
struct tomoyo_domain_initializer_entry e = { .is_not = is_not };
int error = is_delete ? -ENOENT : -ENOMEM;
- if (!tomoyo_is_correct_path(program, 1, -1, -1))
- return -EINVAL; /* No patterns allowed. */
+ if (!tomoyo_is_correct_path(program))
+ return -EINVAL;
if (domainname) {
if (!tomoyo_is_domain_def(domainname) &&
- tomoyo_is_correct_path(domainname, 1, -1, -1))
+ tomoyo_is_correct_path(domainname))
e.is_last_name = true;
else if (!tomoyo_is_correct_domain(domainname))
return -EINVAL;
e.program = tomoyo_get_name(program);
if (!e.program)
goto out;
- if (mutex_lock_interruptible(&tomoyo_policy_lock))
- goto out;
- list_for_each_entry_rcu(ptr, &tomoyo_domain_initializer_list, list) {
- if (!tomoyo_is_same_domain_initializer_entry(ptr, &e))
- continue;
- ptr->is_deleted = is_delete;
- error = 0;
- break;
- }
- if (!is_delete && error) {
- struct tomoyo_domain_initializer_entry *entry =
- tomoyo_commit_ok(&e, sizeof(e));
- if (entry) {
- list_add_tail_rcu(&entry->list,
- &tomoyo_domain_initializer_list);
- error = 0;
- }
- }
- mutex_unlock(&tomoyo_policy_lock);
+ error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
+ &tomoyo_domain_initializer_list,
+ tomoyo_same_domain_initializer_entry);
out:
tomoyo_put_name(e.domainname);
tomoyo_put_name(e.program);
const char *domain = "";
struct tomoyo_domain_initializer_entry *ptr;
ptr = list_entry(pos, struct tomoyo_domain_initializer_entry,
- list);
- if (ptr->is_deleted)
+ head.list);
+ if (ptr->head.is_deleted)
continue;
no = ptr->is_not ? "no_" : "";
if (ptr->domainname) {
struct tomoyo_domain_initializer_entry *ptr;
bool flag = false;
- list_for_each_entry_rcu(ptr, &tomoyo_domain_initializer_list, list) {
- if (ptr->is_deleted)
+ list_for_each_entry_rcu(ptr, &tomoyo_domain_initializer_list,
+ head.list) {
+ if (ptr->head.is_deleted)
continue;
if (ptr->domainname) {
if (!ptr->is_last_name) {
*/
LIST_HEAD(tomoyo_domain_keeper_list);
+static bool tomoyo_same_domain_keeper_entry(const struct tomoyo_acl_head *a,
+ const struct tomoyo_acl_head *b)
+{
+ const struct tomoyo_domain_keeper_entry *p1 =
+ container_of(a, typeof(*p1), head);
+ const struct tomoyo_domain_keeper_entry *p2 =
+ container_of(b, typeof(*p2), head);
+ return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name
+ && p1->domainname == p2->domainname
+ && p1->program == p2->program;
+}
+
/**
* tomoyo_update_domain_keeper_entry - Update "struct tomoyo_domain_keeper_entry" list.
*
const bool is_not,
const bool is_delete)
{
- struct tomoyo_domain_keeper_entry *ptr;
struct tomoyo_domain_keeper_entry e = { .is_not = is_not };
int error = is_delete ? -ENOENT : -ENOMEM;
if (!tomoyo_is_domain_def(domainname) &&
- tomoyo_is_correct_path(domainname, 1, -1, -1))
+ tomoyo_is_correct_path(domainname))
e.is_last_name = true;
else if (!tomoyo_is_correct_domain(domainname))
return -EINVAL;
if (program) {
- if (!tomoyo_is_correct_path(program, 1, -1, -1))
+ if (!tomoyo_is_correct_path(program))
return -EINVAL;
e.program = tomoyo_get_name(program);
if (!e.program)
e.domainname = tomoyo_get_name(domainname);
if (!e.domainname)
goto out;
- if (mutex_lock_interruptible(&tomoyo_policy_lock))
- goto out;
- list_for_each_entry_rcu(ptr, &tomoyo_domain_keeper_list, list) {
- if (!tomoyo_is_same_domain_keeper_entry(ptr, &e))
- continue;
- ptr->is_deleted = is_delete;
- error = 0;
- break;
- }
- if (!is_delete && error) {
- struct tomoyo_domain_keeper_entry *entry =
- tomoyo_commit_ok(&e, sizeof(e));
- if (entry) {
- list_add_tail_rcu(&entry->list,
- &tomoyo_domain_keeper_list);
- error = 0;
- }
- }
- mutex_unlock(&tomoyo_policy_lock);
+ error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
+ &tomoyo_domain_keeper_list,
+ tomoyo_same_domain_keeper_entry);
out:
tomoyo_put_name(e.domainname);
tomoyo_put_name(e.program);
const char *from = "";
const char *program = "";
- ptr = list_entry(pos, struct tomoyo_domain_keeper_entry, list);
- if (ptr->is_deleted)
+ ptr = list_entry(pos, struct tomoyo_domain_keeper_entry,
+ head.list);
+ if (ptr->head.is_deleted)
continue;
no = ptr->is_not ? "no_" : "";
if (ptr->program) {
struct tomoyo_domain_keeper_entry *ptr;
bool flag = false;
- list_for_each_entry_rcu(ptr, &tomoyo_domain_keeper_list, list) {
- if (ptr->is_deleted)
+ list_for_each_entry_rcu(ptr, &tomoyo_domain_keeper_list, head.list) {
+ if (ptr->head.is_deleted)
continue;
if (!ptr->is_last_name) {
if (ptr->domainname != domainname)
return flag;
}
+/*
+ * tomoyo_aggregator_list is used for holding list of rewrite table for
+ * execve() request. Some programs provides similar functionality. This keyword
+ * allows users to aggregate such programs.
+ *
+ * Entries are added by
+ *
+ * # echo 'aggregator /usr/bin/vi /./editor' > \
+ * /sys/kernel/security/tomoyo/exception_policy
+ * # echo 'aggregator /usr/bin/emacs /./editor' > \
+ * /sys/kernel/security/tomoyo/exception_policy
+ *
+ * and are deleted by
+ *
+ * # echo 'delete aggregator /usr/bin/vi /./editor' > \
+ * /sys/kernel/security/tomoyo/exception_policy
+ * # echo 'delete aggregator /usr/bin/emacs /./editor' > \
+ * /sys/kernel/security/tomoyo/exception_policy
+ *
+ * and all entries are retrieved by
+ *
+ * # grep ^aggregator /sys/kernel/security/tomoyo/exception_policy
+ *
+ * In the example above, if /usr/bin/vi or /usr/bin/emacs are executed,
+ * permission is checked for /./editor and domainname which the current process
+ * will belong to after execve() succeeds is calculated using /./editor .
+ */
+LIST_HEAD(tomoyo_aggregator_list);
+
+static bool tomoyo_same_aggregator_entry(const struct tomoyo_acl_head *a,
+ const struct tomoyo_acl_head *b)
+{
+ const struct tomoyo_aggregator_entry *p1 = container_of(a, typeof(*p1),
+ head);
+ const struct tomoyo_aggregator_entry *p2 = container_of(b, typeof(*p2),
+ head);
+ return p1->original_name == p2->original_name &&
+ p1->aggregated_name == p2->aggregated_name;
+}
+
+/**
+ * tomoyo_update_aggregator_entry - Update "struct tomoyo_aggregator_entry" list.
+ *
+ * @original_name: The original program's name.
+ * @aggregated_name: The program name to use.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_update_aggregator_entry(const char *original_name,
+ const char *aggregated_name,
+ const bool is_delete)
+{
+ struct tomoyo_aggregator_entry e = { };
+ int error = is_delete ? -ENOENT : -ENOMEM;
+
+ if (!tomoyo_is_correct_path(original_name) ||
+ !tomoyo_is_correct_path(aggregated_name))
+ return -EINVAL;
+ e.original_name = tomoyo_get_name(original_name);
+ e.aggregated_name = tomoyo_get_name(aggregated_name);
+ if (!e.original_name || !e.aggregated_name ||
+ e.aggregated_name->is_patterned) /* No patterns allowed. */
+ goto out;
+ error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
+ &tomoyo_aggregator_list,
+ tomoyo_same_aggregator_entry);
+ out:
+ tomoyo_put_name(e.original_name);
+ tomoyo_put_name(e.aggregated_name);
+ return error;
+}
+
+/**
+ * tomoyo_read_aggregator_policy - Read "struct tomoyo_aggregator_entry" list.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+bool tomoyo_read_aggregator_policy(struct tomoyo_io_buffer *head)
+{
+ struct list_head *pos;
+ bool done = true;
+
+ list_for_each_cookie(pos, head->read_var2, &tomoyo_aggregator_list) {
+ struct tomoyo_aggregator_entry *ptr;
+
+ ptr = list_entry(pos, struct tomoyo_aggregator_entry,
+ head.list);
+ if (ptr->head.is_deleted)
+ continue;
+ done = tomoyo_io_printf(head, TOMOYO_KEYWORD_AGGREGATOR
+ "%s %s\n", ptr->original_name->name,
+ ptr->aggregated_name->name);
+ if (!done)
+ break;
+ }
+ return done;
+}
+
+/**
+ * tomoyo_write_aggregator_policy - Write "struct tomoyo_aggregator_entry" list.
+ *
+ * @data: String to parse.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_write_aggregator_policy(char *data, const bool is_delete)
+{
+ char *cp = strchr(data, ' ');
+
+ if (!cp)
+ return -EINVAL;
+ *cp++ = '\0';
+ return tomoyo_update_aggregator_entry(data, cp, is_delete);
+}
+
/*
* tomoyo_alias_list is used for holding list of symlink's pathnames which are
* allowed to be passed to an execve() request. Normally, the domainname which
*/
LIST_HEAD(tomoyo_alias_list);
+static bool tomoyo_same_alias_entry(const struct tomoyo_acl_head *a,
+ const struct tomoyo_acl_head *b)
+{
+ const struct tomoyo_alias_entry *p1 = container_of(a, typeof(*p1),
+ head);
+ const struct tomoyo_alias_entry *p2 = container_of(b, typeof(*p2),
+ head);
+ return p1->original_name == p2->original_name &&
+ p1->aliased_name == p2->aliased_name;
+}
+
/**
* tomoyo_update_alias_entry - Update "struct tomoyo_alias_entry" list.
*
const char *aliased_name,
const bool is_delete)
{
- struct tomoyo_alias_entry *ptr;
struct tomoyo_alias_entry e = { };
int error = is_delete ? -ENOENT : -ENOMEM;
- if (!tomoyo_is_correct_path(original_name, 1, -1, -1) ||
- !tomoyo_is_correct_path(aliased_name, 1, -1, -1))
- return -EINVAL; /* No patterns allowed. */
+ if (!tomoyo_is_correct_path(original_name) ||
+ !tomoyo_is_correct_path(aliased_name))
+ return -EINVAL;
e.original_name = tomoyo_get_name(original_name);
e.aliased_name = tomoyo_get_name(aliased_name);
- if (!e.original_name || !e.aliased_name)
- goto out;
- if (mutex_lock_interruptible(&tomoyo_policy_lock))
- goto out;
- list_for_each_entry_rcu(ptr, &tomoyo_alias_list, list) {
- if (!tomoyo_is_same_alias_entry(ptr, &e))
- continue;
- ptr->is_deleted = is_delete;
- error = 0;
- break;
- }
- if (!is_delete && error) {
- struct tomoyo_alias_entry *entry =
- tomoyo_commit_ok(&e, sizeof(e));
- if (entry) {
- list_add_tail_rcu(&entry->list, &tomoyo_alias_list);
- error = 0;
- }
- }
- mutex_unlock(&tomoyo_policy_lock);
+ if (!e.original_name || !e.aliased_name ||
+ e.original_name->is_patterned || e.aliased_name->is_patterned)
+ goto out; /* No patterns allowed. */
+ error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
+ &tomoyo_alias_list,
+ tomoyo_same_alias_entry);
out:
tomoyo_put_name(e.original_name);
tomoyo_put_name(e.aliased_name);
list_for_each_cookie(pos, head->read_var2, &tomoyo_alias_list) {
struct tomoyo_alias_entry *ptr;
- ptr = list_entry(pos, struct tomoyo_alias_entry, list);
- if (ptr->is_deleted)
+ ptr = list_entry(pos, struct tomoyo_alias_entry, head.list);
+ if (ptr->head.is_deleted)
continue;
done = tomoyo_io_printf(head, TOMOYO_KEYWORD_ALIAS "%s %s\n",
ptr->original_name->name,
struct tomoyo_domain_info *domain = NULL;
const char *old_domain_name = old_domain->domainname->name;
const char *original_name = bprm->filename;
- const u8 mode = tomoyo_check_flags(old_domain, TOMOYO_MAC_FOR_FILE);
- const bool is_enforce = (mode == TOMOYO_CONFIG_ENFORCING);
+ u8 mode;
+ bool is_enforce;
int retval = -ENOMEM;
bool need_kfree = false;
struct tomoyo_path_info rn = { }; /* real name */
ln.name = tomoyo_get_last_name(old_domain);
tomoyo_fill_path_info(&ln);
- tomoyo_init_request_info(&r, NULL);
+ mode = tomoyo_init_request_info(&r, NULL, TOMOYO_MAC_FILE_EXECUTE);
+ is_enforce = (mode == TOMOYO_CONFIG_ENFORCING);
if (!tmp)
goto out;
if (tomoyo_pathcmp(&rn, &sn)) {
struct tomoyo_alias_entry *ptr;
/* Is this program allowed to be called via symbolic links? */
- list_for_each_entry_rcu(ptr, &tomoyo_alias_list, list) {
- if (ptr->is_deleted ||
+ list_for_each_entry_rcu(ptr, &tomoyo_alias_list, head.list) {
+ if (ptr->head.is_deleted ||
tomoyo_pathcmp(&rn, ptr->original_name) ||
tomoyo_pathcmp(&sn, ptr->aliased_name))
continue;
}
}
+ /* Check 'aggregator' directive. */
+ {
+ struct tomoyo_aggregator_entry *ptr;
+ list_for_each_entry_rcu(ptr, &tomoyo_aggregator_list,
+ head.list) {
+ if (ptr->head.is_deleted ||
+ !tomoyo_path_matches_pattern(&rn,
+ ptr->original_name))
+ continue;
+ if (need_kfree)
+ kfree(rn.name);
+ need_kfree = false;
+ /* This is OK because it is read only. */
+ rn = *ptr->aggregated_name;
+ break;
+ }
+ }
+
/* Check execute permission. */
- retval = tomoyo_check_exec_perm(old_domain, &rn);
+ retval = tomoyo_path_permission(&r, TOMOYO_TYPE_EXECUTE, &rn);
if (retval == TOMOYO_RETRY_REQUEST)
goto retry;
if (retval < 0)
projects / firefly-linux-kernel-4.4.55.git / blobdiff