diff options
Diffstat (limited to 'security/tomoyo/domain.c')
| -rw-r--r-- | security/tomoyo/domain.c | 219 |
1 files changed, 27 insertions, 192 deletions
diff --git a/security/tomoyo/domain.c b/security/tomoyo/domain.c index 1a122974240..3575b0e7c7f 100644 --- a/security/tomoyo/domain.c +++ b/security/tomoyo/domain.c @@ -127,46 +127,12 @@ void tomoyo_check_acl(struct tomoyo_request_info *r, r->granted = false; } -/* - * 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 - * - * # echo "<kernel>" > /sys/kernel/security/tomoyo/domain_policy - * - * and is deleted by - * - * # echo "delete <kernel>" > /sys/kernel/security/tomoyo/domain_policy - * - * and all domains are retrieved by - * - * # grep '^<kernel>' /sys/kernel/security/tomoyo/domain_policy - * - * 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. - */ +/* 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. * @@ -184,44 +150,6 @@ const char *tomoyo_get_last_name(const struct tomoyo_domain_info *domain) 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 * @@ -272,7 +200,8 @@ static int tomoyo_update_domain_initializer_entry(const char *domainname, if (!e.program) goto out; error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, - &tomoyo_domain_initializer_list, + &tomoyo_policy_list + [TOMOYO_ID_DOMAIN_INITIALIZER], tomoyo_same_domain_initializer_entry); out: tomoyo_put_name(e.domainname); @@ -294,8 +223,8 @@ 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) { + list_for_each_cookie(pos, head->read_var2, &tomoyo_policy_list + [TOMOYO_ID_DOMAIN_INITIALIZER]) { const char *no; const char *from = ""; const char *domain = ""; @@ -366,8 +295,8 @@ static bool tomoyo_domain_initializer(const struct tomoyo_path_info * struct tomoyo_domain_initializer_entry *ptr; bool flag = false; - list_for_each_entry_rcu(ptr, &tomoyo_domain_initializer_list, - head.list) { + list_for_each_entry_rcu(ptr, &tomoyo_policy_list + [TOMOYO_ID_DOMAIN_INITIALIZER], head.list) { if (ptr->head.is_deleted) continue; if (ptr->domainname) { @@ -390,46 +319,6 @@ static bool tomoyo_domain_initializer(const struct tomoyo_path_info * 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) { @@ -478,7 +367,8 @@ static int tomoyo_update_domain_keeper_entry(const char *domainname, if (!e.domainname) goto out; error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, - &tomoyo_domain_keeper_list, + &tomoyo_policy_list + [TOMOYO_ID_DOMAIN_KEEPER], tomoyo_same_domain_keeper_entry); out: tomoyo_put_name(e.domainname); @@ -523,7 +413,7 @@ bool tomoyo_read_domain_keeper_policy(struct tomoyo_io_buffer *head) bool done = true; list_for_each_cookie(pos, head->read_var2, - &tomoyo_domain_keeper_list) { + &tomoyo_policy_list[TOMOYO_ID_DOMAIN_KEEPER]) { struct tomoyo_domain_keeper_entry *ptr; const char *no; const char *from = ""; @@ -567,7 +457,9 @@ static bool tomoyo_domain_keeper(const struct tomoyo_path_info *domainname, struct tomoyo_domain_keeper_entry *ptr; bool flag = false; - list_for_each_entry_rcu(ptr, &tomoyo_domain_keeper_list, head.list) { + 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) { @@ -588,35 +480,6 @@ static bool tomoyo_domain_keeper(const struct tomoyo_path_info *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) { @@ -655,7 +518,7 @@ static int tomoyo_update_aggregator_entry(const char *original_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_policy_list[TOMOYO_ID_AGGREGATOR], tomoyo_same_aggregator_entry); out: tomoyo_put_name(e.original_name); @@ -677,7 +540,8 @@ 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) { + list_for_each_cookie(pos, head->read_var2, + &tomoyo_policy_list[TOMOYO_ID_AGGREGATOR]) { struct tomoyo_aggregator_entry *ptr; ptr = list_entry(pos, struct tomoyo_aggregator_entry, @@ -713,38 +577,6 @@ int tomoyo_write_aggregator_policy(char *data, const bool is_delete) 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 - * 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_alias_entry(const struct tomoyo_acl_head *a, const struct tomoyo_acl_head *b) { @@ -783,7 +615,7 @@ static int tomoyo_update_alias_entry(const char *original_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_policy_list[TOMOYO_ID_ALIAS], tomoyo_same_alias_entry); out: tomoyo_put_name(e.original_name); @@ -805,7 +637,8 @@ 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) { + list_for_each_cookie(pos, head->read_var2, + &tomoyo_policy_list[TOMOYO_ID_ALIAS]) { struct tomoyo_alias_entry *ptr; ptr = list_entry(pos, struct tomoyo_alias_entry, head.list); @@ -946,7 +779,9 @@ int tomoyo_find_next_domain(struct linux_binprm *bprm) 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, head.list) { + list_for_each_entry_rcu(ptr, + &tomoyo_policy_list[TOMOYO_ID_ALIAS], + head.list) { if (ptr->head.is_deleted || tomoyo_pathcmp(&rn, ptr->original_name) || tomoyo_pathcmp(&sn, ptr->aliased_name)) @@ -962,8 +797,8 @@ int tomoyo_find_next_domain(struct linux_binprm *bprm) /* Check 'aggregator' directive. */ { struct tomoyo_aggregator_entry *ptr; - list_for_each_entry_rcu(ptr, &tomoyo_aggregator_list, - head.list) { + 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)) |