/*
* security/tomoyo/domain.c
*
- * Implementation of the Domain-Based Mandatory Access Control.
- *
- * Copyright (C) 2005-2009 NTT DATA CORPORATION
- *
- * Version: 2.2.0 2009/04/01
+ * Domain transition functions for TOMOYO.
*
+ * Copyright (C) 2005-2010 NTT DATA CORPORATION
*/
#include "common.h"
/* The initial domain. */
struct tomoyo_domain_info tomoyo_kernel_domain;
-/*
- * tomoyo_domain_list is used for holding list of domains.
- * The ->acl_info_list of "struct tomoyo_domain_info" is used for holding
- * permissions (e.g. "allow_read /lib/libc-2.5.so") given to each domain.
- *
- * An entry is added by
- *
- * # ( echo "<kernel>"; echo "allow_execute /sbin/init" ) > \
- * /sys/kernel/security/tomoyo/domain_policy
- *
- * and is deleted by
- *
- * # ( echo "<kernel>"; echo "delete allow_execute /sbin/init" ) > \
- * /sys/kernel/security/tomoyo/domain_policy
- *
- * and all entries are retrieved by
- *
- * # cat /sys/kernel/security/tomoyo/domain_policy
- *
- * A domain is added by
+/**
+ * tomoyo_update_policy - Update an entry for exception policy.
*
- * # echo "<kernel>" > /sys/kernel/security/tomoyo/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.
+ * @list: Pointer to "struct list_head".
+ * @check_duplicate: Callback function to find duplicated entry.
*
- * and is deleted by
+ * Returns 0 on success, negative value otherwise.
*
- * # echo "delete <kernel>" > /sys/kernel/security/tomoyo/domain_policy
+ * 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.
*
- * and all domains are retrieved by
+ * @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.
*
- * # grep '^<kernel>' /sys/kernel/security/tomoyo/domain_policy
+ * Returns 0 on success, negative value otherwise.
*
- * Normally, a domainname is monotonically getting longer because a domainname
- * which the process will belong to if an execve() operation succeeds is
- * defined as a concatenation of "current domainname" + "pathname passed to
- * execve()".
- * See tomoyo_domain_initializer_list and tomoyo_domain_keeper_list for
- * exceptions.
+ * 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;
+}
+
+void tomoyo_check_acl(struct tomoyo_request_info *r,
+ bool (*check_entry) (const struct tomoyo_request_info *,
+ const struct tomoyo_acl_info *))
+{
+ const struct tomoyo_domain_info *domain = r->domain;
+ struct tomoyo_acl_info *ptr;
+
+ list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
+ if (ptr->is_deleted || ptr->type != r->param_type)
+ continue;
+ if (check_entry(r, ptr)) {
+ r->granted = true;
+ return;
+ }
+ }
+ r->granted = false;
+}
+
+/* The list for "struct tomoyo_domain_info". */
LIST_HEAD(tomoyo_domain_list);
+struct list_head tomoyo_policy_list[TOMOYO_MAX_POLICY];
+struct list_head tomoyo_group_list[TOMOYO_MAX_GROUP];
+
/**
* tomoyo_get_last_name - Get last component of a domainname.
*
return cp0;
}
-/*
- * tomoyo_domain_initializer_list is used for holding list of programs which
- * triggers reinitialization of domainname. Normally, a domainname is
- * monotonically getting longer. But sometimes, we restart daemon programs.
- * It would be convenient for us that "a daemon started upon system boot" and
- * "the daemon restarted from console" belong to the same domain. Thus, TOMOYO
- * provides a way to shorten domainnames.
- *
- * An entry is added by
- *
- * # echo 'initialize_domain /usr/sbin/httpd' > \
- * /sys/kernel/security/tomoyo/exception_policy
- *
- * and is deleted by
- *
- * # echo 'delete initialize_domain /usr/sbin/httpd' > \
- * /sys/kernel/security/tomoyo/exception_policy
- *
- * and all entries are retrieved by
- *
- * # grep ^initialize_domain /sys/kernel/security/tomoyo/exception_policy
- *
- * In the example above, /usr/sbin/httpd will belong to
- * "<kernel> /usr/sbin/httpd" domain.
- *
- * You may specify a domainname using "from" keyword.
- * "initialize_domain /usr/sbin/httpd from <kernel> /etc/rc.d/init.d/httpd"
- * will cause "/usr/sbin/httpd" executed from "<kernel> /etc/rc.d/init.d/httpd"
- * domain to belong to "<kernel> /usr/sbin/httpd" domain.
- *
- * You may add "no_" prefix to "initialize_domain".
- * "initialize_domain /usr/sbin/httpd" and
- * "no_initialize_domain /usr/sbin/httpd from <kernel> /etc/rc.d/init.d/httpd"
- * will cause "/usr/sbin/httpd" to belong to "<kernel> /usr/sbin/httpd" domain
- * unless executed from "<kernel> /etc/rc.d/init.d/httpd" domain.
- */
-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_correct_path(program))
+ return -EINVAL;
if (domainname) {
- if (!tomoyo_is_domain_def(domainname) &&
- tomoyo_is_correct_path(domainname, 1, -1, -1))
+ if (!tomoyo_domain_def(domainname) &&
+ tomoyo_correct_path(domainname))
e.is_last_name = true;
- else if (!tomoyo_is_correct_domain(domainname))
+ else if (!tomoyo_correct_domain(domainname))
return -EINVAL;
e.domainname = tomoyo_get_name(domainname);
if (!e.domainname)
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_policy_list
+ [TOMOYO_ID_DOMAIN_INITIALIZER],
+ tomoyo_same_domain_initializer_entry);
out:
tomoyo_put_name(e.domainname);
tomoyo_put_name(e.program);
return error;
}
-/**
- * tomoyo_read_domain_initializer_policy - Read "struct tomoyo_domain_initializer_entry" list.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_read_domain_initializer_policy(struct tomoyo_io_buffer *head)
-{
- struct list_head *pos;
- bool done = true;
-
- list_for_each_cookie(pos, head->read_var2,
- &tomoyo_domain_initializer_list) {
- const char *no;
- const char *from = "";
- const char *domain = "";
- struct tomoyo_domain_initializer_entry *ptr;
- ptr = list_entry(pos, struct tomoyo_domain_initializer_entry,
- list);
- if (ptr->is_deleted)
- continue;
- no = ptr->is_not ? "no_" : "";
- if (ptr->domainname) {
- from = " from ";
- domain = ptr->domainname->name;
- }
- done = tomoyo_io_printf(head,
- "%s" TOMOYO_KEYWORD_INITIALIZE_DOMAIN
- "%s%s%s\n", no, ptr->program->name,
- from, domain);
- if (!done)
- break;
- }
- return done;
-}
-
/**
* tomoyo_write_domain_initializer_policy - Write "struct tomoyo_domain_initializer_entry" list.
*
}
/**
- * tomoyo_is_domain_initializer - Check whether the given program causes domainname reinitialization.
+ * tomoyo_domain_initializer - Check whether the given program causes domainname reinitialization.
*
* @domainname: The name of domain.
* @program: The name of program.
*
* Caller holds tomoyo_read_lock().
*/
-static bool tomoyo_is_domain_initializer(const struct tomoyo_path_info *
+static bool tomoyo_domain_initializer(const struct tomoyo_path_info *
domainname,
const struct tomoyo_path_info *program,
const struct tomoyo_path_info *
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_policy_list
+ [TOMOYO_ID_DOMAIN_INITIALIZER], head.list) {
+ if (ptr->head.is_deleted)
continue;
if (ptr->domainname) {
if (!ptr->is_last_name) {
return flag;
}
-/*
- * tomoyo_domain_keeper_list is used for holding list of domainnames which
- * suppresses domain transition. Normally, a domainname is monotonically
- * getting longer. But sometimes, we want to suppress domain transition.
- * It would be convenient for us that programs executed from a login session
- * belong to the same domain. Thus, TOMOYO provides a way to suppress domain
- * transition.
- *
- * An entry is added by
- *
- * # echo 'keep_domain <kernel> /usr/sbin/sshd /bin/bash' > \
- * /sys/kernel/security/tomoyo/exception_policy
- *
- * and is deleted by
- *
- * # echo 'delete keep_domain <kernel> /usr/sbin/sshd /bin/bash' > \
- * /sys/kernel/security/tomoyo/exception_policy
- *
- * and all entries are retrieved by
- *
- * # grep ^keep_domain /sys/kernel/security/tomoyo/exception_policy
- *
- * In the example above, any process which belongs to
- * "<kernel> /usr/sbin/sshd /bin/bash" domain will remain in that domain,
- * unless explicitly specified by "initialize_domain" or "no_keep_domain".
- *
- * You may specify a program using "from" keyword.
- * "keep_domain /bin/pwd from <kernel> /usr/sbin/sshd /bin/bash"
- * will cause "/bin/pwd" executed from "<kernel> /usr/sbin/sshd /bin/bash"
- * domain to remain in "<kernel> /usr/sbin/sshd /bin/bash" domain.
- *
- * You may add "no_" prefix to "keep_domain".
- * "keep_domain <kernel> /usr/sbin/sshd /bin/bash" and
- * "no_keep_domain /usr/bin/passwd from <kernel> /usr/sbin/sshd /bin/bash" will
- * cause "/usr/bin/passwd" to belong to
- * "<kernel> /usr/sbin/sshd /bin/bash /usr/bin/passwd" domain, unless
- * explicitly specified by "initialize_domain".
- */
-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))
+ if (!tomoyo_domain_def(domainname) &&
+ tomoyo_correct_path(domainname))
e.is_last_name = true;
- else if (!tomoyo_is_correct_domain(domainname))
+ else if (!tomoyo_correct_domain(domainname))
return -EINVAL;
if (program) {
- if (!tomoyo_is_correct_path(program, 1, -1, -1))
+ if (!tomoyo_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_policy_list
+ [TOMOYO_ID_DOMAIN_KEEPER],
+ tomoyo_same_domain_keeper_entry);
out:
tomoyo_put_name(e.domainname);
tomoyo_put_name(e.program);
}
/**
- * tomoyo_read_domain_keeper_policy - Read "struct tomoyo_domain_keeper_entry" list.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_read_domain_keeper_policy(struct tomoyo_io_buffer *head)
-{
- struct list_head *pos;
- bool done = true;
-
- list_for_each_cookie(pos, head->read_var2,
- &tomoyo_domain_keeper_list) {
- struct tomoyo_domain_keeper_entry *ptr;
- const char *no;
- const char *from = "";
- const char *program = "";
-
- ptr = list_entry(pos, struct tomoyo_domain_keeper_entry, list);
- if (ptr->is_deleted)
- continue;
- no = ptr->is_not ? "no_" : "";
- if (ptr->program) {
- from = " from ";
- program = ptr->program->name;
- }
- done = tomoyo_io_printf(head,
- "%s" TOMOYO_KEYWORD_KEEP_DOMAIN
- "%s%s%s\n", no, program, from,
- ptr->domainname->name);
- if (!done)
- break;
- }
- return done;
-}
-
-/**
- * tomoyo_is_domain_keeper - Check whether the given program causes domain transition suppression.
+ * tomoyo_domain_keeper - Check whether the given program causes domain transition suppression.
*
* @domainname: The name of domain.
* @program: The name of program.
*
* Caller holds tomoyo_read_lock().
*/
-static bool tomoyo_is_domain_keeper(const struct tomoyo_path_info *domainname,
+static bool tomoyo_domain_keeper(const struct tomoyo_path_info *domainname,
const struct tomoyo_path_info *program,
const struct tomoyo_path_info *last_name)
{
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_policy_list[TOMOYO_ID_DOMAIN_KEEPER],
+ head.list) {
+ if (ptr->head.is_deleted)
continue;
if (!ptr->is_last_name) {
if (ptr->domainname != domainname)
return flag;
}
-/*
- * 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
- * the current process will belong to after execve() succeeds is calculated
- * using dereferenced pathnames. But some programs behave differently depending
- * on the name passed to argv[0]. For busybox, calculating domainname using
- * dereferenced pathnames will cause all programs in the busybox to belong to
- * the same domain. Thus, TOMOYO provides a way to allow use of symlink's
- * pathname for checking execve()'s permission and calculating domainname which
- * the current process will belong to after execve() succeeds.
- *
- * An entry is added by
- *
- * # echo 'alias /bin/busybox /bin/cat' > \
- * /sys/kernel/security/tomoyo/exception_policy
- *
- * and is deleted by
- *
- * # echo 'delete alias /bin/busybox /bin/cat' > \
- * /sys/kernel/security/tomoyo/exception_policy
- *
- * and all entries are retrieved by
- *
- * # grep ^alias /sys/kernel/security/tomoyo/exception_policy
- *
- * In the example above, if /bin/cat is a symlink to /bin/busybox and execution
- * of /bin/cat is requested, permission is checked for /bin/cat rather than
- * /bin/busybox and domainname which the current process will belong to after
- * execve() succeeds is calculated using /bin/cat rather than /bin/busybox .
- */
-LIST_HEAD(tomoyo_alias_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_alias_entry - Update "struct tomoyo_alias_entry" list.
+ * tomoyo_update_aggregator_entry - Update "struct tomoyo_aggregator_entry" list.
*
- * @original_name: The original program's real name.
- * @aliased_name: The symbolic program's symbolic link's name.
- * @is_delete: True if it is a delete request.
+ * @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_alias_entry(const char *original_name,
- const char *aliased_name,
- const bool is_delete)
+static int tomoyo_update_aggregator_entry(const char *original_name,
+ const char *aggregated_name,
+ const bool is_delete)
{
- struct tomoyo_alias_entry *ptr;
- struct tomoyo_alias_entry e = { };
+ struct tomoyo_aggregator_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_correct_path(original_name) ||
+ !tomoyo_correct_path(aggregated_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)
+ 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;
- 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);
+ error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
+ &tomoyo_policy_list[TOMOYO_ID_AGGREGATOR],
+ tomoyo_same_aggregator_entry);
out:
tomoyo_put_name(e.original_name);
- tomoyo_put_name(e.aliased_name);
+ tomoyo_put_name(e.aggregated_name);
return error;
}
/**
- * tomoyo_read_alias_policy - Read "struct tomoyo_alias_entry" list.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_read_alias_policy(struct tomoyo_io_buffer *head)
-{
- struct list_head *pos;
- bool done = true;
-
- 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)
- continue;
- done = tomoyo_io_printf(head, TOMOYO_KEYWORD_ALIAS "%s %s\n",
- ptr->original_name->name,
- ptr->aliased_name->name);
- if (!done)
- break;
- }
- return done;
-}
-
-/**
- * tomoyo_write_alias_policy - Write "struct tomoyo_alias_entry" list.
+ * tomoyo_write_aggregator_policy - Write "struct tomoyo_aggregator_entry" list.
*
* @data: String to parse.
* @is_delete: True if it is a delete request.
*
* Caller holds tomoyo_read_lock().
*/
-int tomoyo_write_alias_policy(char *data, const bool is_delete)
+int tomoyo_write_aggregator_policy(char *data, const bool is_delete)
{
char *cp = strchr(data, ' ');
if (!cp)
return -EINVAL;
*cp++ = '\0';
- return tomoyo_update_alias_entry(data, cp, is_delete);
+ return tomoyo_update_aggregator_entry(data, cp, is_delete);
}
/**
const struct tomoyo_path_info *saved_domainname;
bool found = false;
- if (!tomoyo_is_correct_domain(domainname))
+ if (!tomoyo_correct_domain(domainname))
return NULL;
saved_domainname = tomoyo_get_name(domainname);
if (!saved_domainname)
*/
int tomoyo_find_next_domain(struct linux_binprm *bprm)
{
- /*
- * This function assumes that the size of buffer returned by
- * tomoyo_realpath() = TOMOYO_MAX_PATHNAME_LEN.
- */
- struct tomoyo_page_buffer *tmp = kzalloc(sizeof(*tmp), GFP_NOFS);
+ struct tomoyo_request_info r;
+ char *tmp = kzalloc(TOMOYO_EXEC_TMPSIZE, GFP_NOFS);
struct tomoyo_domain_info *old_domain = tomoyo_domain();
struct tomoyo_domain_info *domain = NULL;
const char *old_domain_name = old_domain->domainname->name;
const char *original_name = bprm->filename;
- char *new_domain_name = NULL;
- char *real_program_name = NULL;
- char *symlink_program_name = NULL;
- const u8 mode = tomoyo_check_flags(old_domain, TOMOYO_MAC_FOR_FILE);
- const bool is_enforce = (mode == 3);
+ u8 mode;
+ bool is_enforce;
int retval = -ENOMEM;
- struct tomoyo_path_info r; /* real name */
- struct tomoyo_path_info s; /* symlink name */
- struct tomoyo_path_info l; /* last name */
- static bool initialized;
-
+ bool need_kfree = false;
+ struct tomoyo_path_info rn = { }; /* real name */
+ struct tomoyo_path_info ln; /* last name */
+
+ ln.name = tomoyo_get_last_name(old_domain);
+ tomoyo_fill_path_info(&ln);
+ mode = tomoyo_init_request_info(&r, NULL, TOMOYO_MAC_FILE_EXECUTE);
+ is_enforce = (mode == TOMOYO_CONFIG_ENFORCING);
if (!tmp)
goto out;
- if (!initialized) {
- /*
- * Built-in initializers. This is needed because policies are
- * not loaded until starting /sbin/init.
- */
- tomoyo_update_domain_initializer_entry(NULL, "/sbin/hotplug",
- false, false);
- tomoyo_update_domain_initializer_entry(NULL, "/sbin/modprobe",
- false, false);
- initialized = true;
+ retry:
+ if (need_kfree) {
+ kfree(rn.name);
+ need_kfree = false;
}
-
- /* Get tomoyo_realpath of program. */
+ /* Get symlink's pathname of program. */
retval = -ENOENT;
- /* I hope tomoyo_realpath() won't fail with -ENOMEM. */
- real_program_name = tomoyo_realpath(original_name);
- if (!real_program_name)
+ rn.name = tomoyo_realpath_nofollow(original_name);
+ if (!rn.name)
goto out;
- /* Get tomoyo_realpath of symbolic link. */
- symlink_program_name = tomoyo_realpath_nofollow(original_name);
- if (!symlink_program_name)
- goto out;
-
- r.name = real_program_name;
- tomoyo_fill_path_info(&r);
- s.name = symlink_program_name;
- tomoyo_fill_path_info(&s);
- l.name = tomoyo_get_last_name(old_domain);
- tomoyo_fill_path_info(&l);
-
- /* Check 'alias' directive. */
- if (tomoyo_pathcmp(&r, &s)) {
- 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 ||
- tomoyo_pathcmp(&r, ptr->original_name) ||
- tomoyo_pathcmp(&s, ptr->aliased_name))
+ tomoyo_fill_path_info(&rn);
+ need_kfree = true;
+
+ /* Check 'aggregator' directive. */
+ {
+ struct tomoyo_aggregator_entry *ptr;
+ list_for_each_entry_rcu(ptr, &tomoyo_policy_list
+ [TOMOYO_ID_AGGREGATOR], head.list) {
+ if (ptr->head.is_deleted ||
+ !tomoyo_path_matches_pattern(&rn,
+ ptr->original_name))
continue;
- memset(real_program_name, 0, TOMOYO_MAX_PATHNAME_LEN);
- strncpy(real_program_name, ptr->aliased_name->name,
- TOMOYO_MAX_PATHNAME_LEN - 1);
- tomoyo_fill_path_info(&r);
+ 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, &r);
+ retval = tomoyo_path_permission(&r, TOMOYO_TYPE_EXECUTE, &rn);
+ if (retval == TOMOYO_RETRY_REQUEST)
+ goto retry;
if (retval < 0)
goto out;
- new_domain_name = tmp->buffer;
- if (tomoyo_is_domain_initializer(old_domain->domainname, &r, &l)) {
+ if (tomoyo_domain_initializer(old_domain->domainname, &rn, &ln)) {
/* Transit to the child of tomoyo_kernel_domain domain. */
- snprintf(new_domain_name, TOMOYO_MAX_PATHNAME_LEN + 1,
- TOMOYO_ROOT_NAME " " "%s", real_program_name);
+ snprintf(tmp, TOMOYO_EXEC_TMPSIZE - 1,
+ TOMOYO_ROOT_NAME " " "%s", rn.name);
} else if (old_domain == &tomoyo_kernel_domain &&
!tomoyo_policy_loaded) {
/*
* initializers because they might start before /sbin/init.
*/
domain = old_domain;
- } else if (tomoyo_is_domain_keeper(old_domain->domainname, &r, &l)) {
+ } else if (tomoyo_domain_keeper(old_domain->domainname, &rn, &ln)) {
/* Keep current domain. */
domain = old_domain;
} else {
/* Normal domain transition. */
- snprintf(new_domain_name, TOMOYO_MAX_PATHNAME_LEN + 1,
- "%s %s", old_domain_name, real_program_name);
+ snprintf(tmp, TOMOYO_EXEC_TMPSIZE - 1,
+ "%s %s", old_domain_name, rn.name);
}
- if (domain || strlen(new_domain_name) >= TOMOYO_MAX_PATHNAME_LEN)
+ if (domain || strlen(tmp) >= TOMOYO_EXEC_TMPSIZE - 10)
goto done;
- domain = tomoyo_find_domain(new_domain_name);
+ domain = tomoyo_find_domain(tmp);
if (domain)
goto done;
- if (is_enforce)
- goto done;
- domain = tomoyo_find_or_assign_new_domain(new_domain_name,
- old_domain->profile);
+ if (is_enforce) {
+ int error = tomoyo_supervisor(&r, "# wants to create domain\n"
+ "%s\n", tmp);
+ if (error == TOMOYO_RETRY_REQUEST)
+ goto retry;
+ if (error < 0)
+ goto done;
+ }
+ domain = tomoyo_find_or_assign_new_domain(tmp, old_domain->profile);
done:
if (domain)
goto out;
- printk(KERN_WARNING "TOMOYO-ERROR: Domain '%s' not defined.\n",
- new_domain_name);
+ printk(KERN_WARNING "TOMOYO-ERROR: Domain '%s' not defined.\n", tmp);
if (is_enforce)
retval = -EPERM;
else
/* Update reference count on "struct tomoyo_domain_info". */
atomic_inc(&domain->users);
bprm->cred->security = domain;
- kfree(real_program_name);
- kfree(symlink_program_name);
+ if (need_kfree)
+ kfree(rn.name);
kfree(tmp);
return retval;
}
git://bbs.cooldavid.org / net-next-2.6.git / blobdiff