diff options
Diffstat (limited to 'security/tomoyo')
| -rw-r--r-- | security/tomoyo/common.c | 38 | ||||
| -rw-r--r-- | security/tomoyo/common.h | 441 | ||||
| -rw-r--r-- | security/tomoyo/file.c | 3 | ||||
| -rw-r--r-- | security/tomoyo/mount.c | 79 | ||||
| -rw-r--r-- | security/tomoyo/securityfs_if.c | 2 |
5 files changed, 204 insertions, 359 deletions
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c index 0776173b7d2..1c340217a06 100644 --- a/security/tomoyo/common.c +++ b/security/tomoyo/common.c @@ -643,7 +643,7 @@ static int tomoyo_update_manager_entry(const char *manager, static int tomoyo_write_manager(struct tomoyo_io_buffer *head) { char *data = head->write_buf; - bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE); + bool is_delete = tomoyo_str_starts(&data, "delete "); if (!strcmp(data, "manage_by_non_root")) { tomoyo_manage_by_non_root = !is_delete; @@ -830,7 +830,7 @@ static int tomoyo_delete_domain(char *domainname) static int tomoyo_write_domain2(char *data, struct tomoyo_domain_info *domain, const bool is_delete) { - if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALLOW_MOUNT)) + if (tomoyo_str_starts(&data, "allow_mount ")) return tomoyo_write_mount(data, domain, is_delete); return tomoyo_write_file(data, domain, is_delete); } @@ -852,9 +852,9 @@ static int tomoyo_write_domain(struct tomoyo_io_buffer *head) bool is_select = false; unsigned int profile; - if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE)) + if (tomoyo_str_starts(&data, "delete ")) is_delete = true; - else if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_SELECT)) + else if (tomoyo_str_starts(&data, "select ")) is_select = true; if (is_select && tomoyo_select_one(head, data)) return 0; @@ -875,17 +875,17 @@ static int tomoyo_write_domain(struct tomoyo_io_buffer *head) if (!domain) return -EINVAL; - if (sscanf(data, TOMOYO_KEYWORD_USE_PROFILE "%u", &profile) == 1 + if (sscanf(data, "use_profile %u", &profile) == 1 && profile < TOMOYO_MAX_PROFILES) { if (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded) domain->profile = (u8) profile; return 0; } - if (!strcmp(data, TOMOYO_KEYWORD_QUOTA_EXCEEDED)) { + if (!strcmp(data, "quota_exceeded")) { domain->quota_warned = !is_delete; return 0; } - if (!strcmp(data, TOMOYO_KEYWORD_TRANSITION_FAILED)) { + if (!strcmp(data, "transition_failed")) { domain->transition_failed = !is_delete; return 0; } @@ -1039,8 +1039,7 @@ static void tomoyo_read_domain(struct tomoyo_io_buffer *head) /* Print domainname and flags. */ tomoyo_set_string(head, domain->domainname->name); tomoyo_set_lf(head); - tomoyo_io_printf(head, - TOMOYO_KEYWORD_USE_PROFILE "%u\n", + tomoyo_io_printf(head, "use_profile %u\n", domain->profile); if (domain->quota_warned) tomoyo_set_string(head, "quota_exceeded\n"); @@ -1192,17 +1191,15 @@ static void tomoyo_read_pid(struct tomoyo_io_buffer *head) } static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = { - [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] - = TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN, - [TOMOYO_TRANSITION_CONTROL_INITIALIZE] - = TOMOYO_KEYWORD_INITIALIZE_DOMAIN, - [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = TOMOYO_KEYWORD_NO_KEEP_DOMAIN, - [TOMOYO_TRANSITION_CONTROL_KEEP] = TOMOYO_KEYWORD_KEEP_DOMAIN + [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain", + [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain", + [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain", + [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain", }; static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = { - [TOMOYO_PATH_GROUP] = TOMOYO_KEYWORD_PATH_GROUP, - [TOMOYO_NUMBER_GROUP] = TOMOYO_KEYWORD_NUMBER_GROUP + [TOMOYO_PATH_GROUP] = "path_group ", + [TOMOYO_NUMBER_GROUP] = "number_group ", }; /** @@ -1217,13 +1214,13 @@ static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = { static int tomoyo_write_exception(struct tomoyo_io_buffer *head) { char *data = head->write_buf; - bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE); + bool is_delete = tomoyo_str_starts(&data, "delete "); u8 i; static const struct { const char *keyword; int (*write) (char *, const bool); } tomoyo_callback[1] = { - { TOMOYO_KEYWORD_AGGREGATOR, tomoyo_write_aggregator }, + { "aggregator ", tomoyo_write_aggregator }, }; for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++) @@ -1324,8 +1321,7 @@ static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx) { struct tomoyo_aggregator *ptr = container_of(acl, typeof(*ptr), head); - tomoyo_set_string(head, - TOMOYO_KEYWORD_AGGREGATOR); + tomoyo_set_string(head, "aggregator "); tomoyo_set_string(head, ptr->original_name->name); tomoyo_set_space(head); diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h index a5d6e212b18..d0645733c10 100644 --- a/security/tomoyo/common.h +++ b/security/tomoyo/common.h @@ -38,6 +38,7 @@ struct linux_binprm; /* Profile number is an integer between 0 and 255. */ #define TOMOYO_MAX_PROFILES 256 +/* Index numbers for operation mode. */ enum tomoyo_mode_index { TOMOYO_CONFIG_DISABLED, TOMOYO_CONFIG_LEARNING, @@ -46,6 +47,7 @@ enum tomoyo_mode_index { TOMOYO_CONFIG_USE_DEFAULT = 255 }; +/* Index numbers for entry type. */ enum tomoyo_policy_id { TOMOYO_ID_GROUP, TOMOYO_ID_PATH_GROUP, @@ -59,37 +61,26 @@ enum tomoyo_policy_id { TOMOYO_MAX_POLICY }; +/* Index numbers for group entries. */ enum tomoyo_group_id { TOMOYO_PATH_GROUP, TOMOYO_NUMBER_GROUP, TOMOYO_MAX_GROUP }; -/* Keywords for ACLs. */ -#define TOMOYO_KEYWORD_AGGREGATOR "aggregator " -#define TOMOYO_KEYWORD_ALLOW_MOUNT "allow_mount " -#define TOMOYO_KEYWORD_ALLOW_READ "allow_read " -#define TOMOYO_KEYWORD_DELETE "delete " -#define TOMOYO_KEYWORD_INITIALIZE_DOMAIN "initialize_domain " -#define TOMOYO_KEYWORD_KEEP_DOMAIN "keep_domain " -#define TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN "no_initialize_domain " -#define TOMOYO_KEYWORD_NO_KEEP_DOMAIN "no_keep_domain " -#define TOMOYO_KEYWORD_PATH_GROUP "path_group " -#define TOMOYO_KEYWORD_NUMBER_GROUP "number_group " -#define TOMOYO_KEYWORD_SELECT "select " -#define TOMOYO_KEYWORD_USE_PROFILE "use_profile " -#define TOMOYO_KEYWORD_QUOTA_EXCEEDED "quota_exceeded" -#define TOMOYO_KEYWORD_TRANSITION_FAILED "transition_failed" /* A domain definition starts with <kernel>. */ #define TOMOYO_ROOT_NAME "<kernel>" #define TOMOYO_ROOT_NAME_LEN (sizeof(TOMOYO_ROOT_NAME) - 1) -/* Value type definition. */ -#define TOMOYO_VALUE_TYPE_INVALID 0 -#define TOMOYO_VALUE_TYPE_DECIMAL 1 -#define TOMOYO_VALUE_TYPE_OCTAL 2 -#define TOMOYO_VALUE_TYPE_HEXADECIMAL 3 +/* Index numbers for type of numeric values. */ +enum tomoyo_value_type { + TOMOYO_VALUE_TYPE_INVALID, + TOMOYO_VALUE_TYPE_DECIMAL, + TOMOYO_VALUE_TYPE_OCTAL, + TOMOYO_VALUE_TYPE_HEXADECIMAL, +}; +/* Index numbers for domain transition control keywords. */ enum tomoyo_transition_type { /* Do not change this order, */ TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE, @@ -108,7 +99,7 @@ enum tomoyo_acl_entry_type_index { TOMOYO_TYPE_MOUNT_ACL, }; -/* Index numbers for File Controls. */ +/* Index numbers for access controls with one pathname. */ enum tomoyo_path_acl_index { TOMOYO_TYPE_EXECUTE, TOMOYO_TYPE_READ, @@ -130,6 +121,7 @@ enum tomoyo_mkdev_acl_index { TOMOYO_MAX_MKDEV_OPERATION }; +/* Index numbers for access controls with two pathnames. */ enum tomoyo_path2_acl_index { TOMOYO_TYPE_LINK, TOMOYO_TYPE_RENAME, @@ -137,6 +129,7 @@ enum tomoyo_path2_acl_index { TOMOYO_MAX_PATH2_OPERATION }; +/* Index numbers for access controls with one pathname and one number. */ enum tomoyo_path_number_acl_index { TOMOYO_TYPE_CREATE, TOMOYO_TYPE_MKDIR, @@ -149,6 +142,7 @@ enum tomoyo_path_number_acl_index { TOMOYO_MAX_PATH_NUMBER_OPERATION }; +/* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */ enum tomoyo_securityfs_interface_index { TOMOYO_DOMAINPOLICY, TOMOYO_EXCEPTIONPOLICY, @@ -162,6 +156,19 @@ enum tomoyo_securityfs_interface_index { TOMOYO_MANAGER }; +/* Index numbers for special mount operations. */ +enum tomoyo_special_mount { + TOMOYO_MOUNT_BIND, /* mount --bind /source /dest */ + TOMOYO_MOUNT_MOVE, /* mount --move /old /new */ + TOMOYO_MOUNT_REMOUNT, /* mount -o remount /dir */ + TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */ + TOMOYO_MOUNT_MAKE_PRIVATE, /* mount --make-private /dir */ + TOMOYO_MOUNT_MAKE_SLAVE, /* mount --make-slave /dir */ + TOMOYO_MOUNT_MAKE_SHARED, /* mount --make-shared /dir */ + TOMOYO_MAX_SPECIAL_MOUNT +}; + +/* Index numbers for functionality. */ enum tomoyo_mac_index { TOMOYO_MAC_FILE_EXECUTE, TOMOYO_MAC_FILE_OPEN, @@ -189,37 +196,30 @@ enum tomoyo_mac_index { TOMOYO_MAX_MAC_INDEX }; +/* Index numbers for category of functionality. */ enum tomoyo_mac_category_index { TOMOYO_MAC_CATEGORY_FILE, TOMOYO_MAX_MAC_CATEGORY_INDEX }; -#define TOMOYO_RETRY_REQUEST 1 /* Retry this request. */ - -/********** Structure definitions. **********/ - /* - * tomoyo_acl_head is a structure which is used for holding elements not in - * domain policy. - * It has following fields. + * Retry this request. Returned by tomoyo_supervisor() if policy violation has + * occurred in enforcing mode and the userspace daemon decided to retry. * - * (1) "list" which is linked to tomoyo_policy_list[] . - * (2) "is_deleted" is a bool which is true if marked as deleted, false - * otherwise. + * We must choose a positive value in order to distinguish "granted" (which is + * 0) and "rejected" (which is a negative value) and "retry". */ +#define TOMOYO_RETRY_REQUEST 1 + +/********** Structure definitions. **********/ + +/* Common header for holding ACL entries. */ struct tomoyo_acl_head { struct list_head list; bool is_deleted; } __packed; -/* - * tomoyo_request_info is a structure which is used for holding - * - * (1) Domain information of current process. - * (2) How many retries are made for this request. - * (3) Profile number used for this request. - * (4) Access control mode of the profile. - */ +/* Structure for request info. */ struct tomoyo_request_info { struct tomoyo_domain_info *domain; /* For holding parameters. */ @@ -228,11 +228,13 @@ struct tomoyo_request_info { const struct tomoyo_path_info *filename; /* For using wildcards at tomoyo_find_next_domain(). */ const struct tomoyo_path_info *matched_path; + /* One of values in "enum tomoyo_path_acl_index". */ u8 operation; } path; struct { const struct tomoyo_path_info *filename1; const struct tomoyo_path_info *filename2; + /* One of values in "enum tomoyo_path2_acl_index". */ u8 operation; } path2; struct { @@ -240,11 +242,16 @@ struct tomoyo_request_info { unsigned int mode; unsigned int major; unsigned int minor; + /* One of values in "enum tomoyo_mkdev_acl_index". */ u8 operation; } mkdev; struct { const struct tomoyo_path_info *filename; unsigned long number; + /* + * One of values in + * "enum tomoyo_path_number_acl_index". + */ u8 operation; } path_number; struct { @@ -263,26 +270,7 @@ struct tomoyo_request_info { u8 type; }; -/* - * tomoyo_path_info is a structure which is used for holding a string data - * used by TOMOYO. - * This structure has several fields for supporting pattern matching. - * - * (1) "name" is the '\0' terminated string data. - * (2) "hash" is full_name_hash(name, strlen(name)). - * This allows tomoyo_pathcmp() to compare by hash before actually compare - * using strcmp(). - * (3) "const_len" is the length of the initial segment of "name" which - * consists entirely of non wildcard characters. In other words, the length - * which we can compare two strings using strncmp(). - * (4) "is_dir" is a bool which is true if "name" ends with "/", - * false otherwise. - * TOMOYO distinguishes directory and non-directory. A directory ends with - * "/" and non-directory does not end with "/". - * (5) "is_patterned" is a bool which is true if "name" contains wildcard - * characters, false otherwise. This allows TOMOYO to use "hash" and - * strcmp() for string comparison if "is_patterned" is false. - */ +/* Structure for holding a token. */ struct tomoyo_path_info { const char *name; u32 hash; /* = full_name_hash(name, strlen(name)) */ @@ -291,27 +279,30 @@ struct tomoyo_path_info { bool is_patterned; /* = tomoyo_path_contains_pattern(name) */ }; -/* - * tomoyo_name is a structure which is used for linking - * "struct tomoyo_path_info" into tomoyo_name_list . - */ +/* Structure for holding string data. */ struct tomoyo_name { struct list_head list; atomic_t users; struct tomoyo_path_info entry; }; +/* Structure for holding a word. */ struct tomoyo_name_union { + /* Either @filename or @group is NULL. */ const struct tomoyo_path_info *filename; struct tomoyo_group *group; + /* True if @group != NULL, false if @filename != NULL. */ u8 is_group; }; +/* Structure for holding a number. */ struct tomoyo_number_union { unsigned long values[2]; - struct tomoyo_group *group; + struct tomoyo_group *group; /* Maybe NULL. */ + /* One of values in "enum tomoyo_value_type". */ u8 min_type; u8 max_type; + /* True if @group != NULL, false otherwise. */ u8 is_group; }; @@ -335,56 +326,14 @@ struct tomoyo_number_group { struct tomoyo_number_union number; }; -/* - * tomoyo_acl_info is a structure which is used for holding - * - * (1) "list" which is linked to the ->acl_info_list of - * "struct tomoyo_domain_info" - * (2) "is_deleted" is a bool which is true if this domain is marked as - * "deleted", false otherwise. - * (3) "type" which tells type of the entry. - * - * Packing "struct tomoyo_acl_info" allows - * "struct tomoyo_path_acl" to embed "u16" and "struct tomoyo_path2_acl" - * "struct tomoyo_path_number_acl" "struct tomoyo_mkdev_acl" to embed - * "u8" without enlarging their structure size. - */ +/* Common header for individual entries. */ struct tomoyo_acl_info { struct list_head list; bool is_deleted; - u8 type; /* = one of values in "enum tomoyo_acl_entry_type_index". */ + u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */ } __packed; -/* - * tomoyo_domain_info is a structure which is used for holding permissions - * (e.g. "allow_read /lib/libc-2.5.so") given to each domain. - * It has following fields. - * - * (1) "list" which is linked to tomoyo_domain_list . - * (2) "acl_info_list" which is linked to "struct tomoyo_acl_info". - * (3) "domainname" which holds the name of the domain. - * (4) "profile" which remembers profile number assigned to this domain. - * (5) "is_deleted" is a bool which is true if this domain is marked as - * "deleted", false otherwise. - * (6) "quota_warned" is a bool which is used for suppressing warning message - * when learning mode learned too much entries. - * (7) "transition_failed" is a bool which is set to true when this domain was - * unable to create a new domain at tomoyo_find_next_domain() because the - * name of the domain to be created was too long or it could not allocate - * memory. If set to true, more than one process continued execve() - * without domain transition. - * (9) "users" is an atomic_t that holds how many "struct cred"->security - * are referring this "struct tomoyo_domain_info". If is_deleted == true - * and users == 0, this struct will be kfree()d upon next garbage - * collection. - * - * A domain's lifecycle is an analogy of files on / directory. - * Multiple domains with the same domainname cannot be created (as with - * creating files with the same filename fails with -EEXIST). - * If a process reached a domain, that process can reside in that domain after - * that domain is marked as "deleted" (as with a process can access an already - * open()ed file after that file was unlink()ed). - */ +/* Structure for domain information. */ struct tomoyo_domain_info { struct list_head list; struct list_head acl_info_list; @@ -398,63 +347,32 @@ struct tomoyo_domain_info { }; /* - * tomoyo_path_acl is a structure which is used for holding an - * entry with one pathname operation (e.g. open(), mkdir()). - * It has following fields. - * - * (1) "head" which is a "struct tomoyo_acl_info". - * (2) "perm" which is a bitmask of permitted operations. - * (3) "name" is the pathname. - * - * Directives held by this structure are "allow_execute", "allow_read", - * "allow_write", "allow_append", "allow_unlink", "allow_rmdir", - * "allow_truncate", "allow_symlink", "allow_chroot" and "allow_unmount". + * Structure for "file execute", "file read", "file write", "file append", + * "file unlink", "file getattr", "file rmdir", "file truncate", + * "file symlink", "file chroot" and "file unmount" directive. */ struct tomoyo_path_acl { struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */ - u16 perm; + u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */ struct tomoyo_name_union name; }; /* - * tomoyo_path_number_acl is a structure which is used for holding an - * entry with one pathname and one number operation. - * It has following fields. - * - * (1) "head" which is a "struct tomoyo_acl_info". - * (2) "perm" which is a bitmask of permitted operations. - * (3) "name" is the pathname. - * (4) "number" is the numeric value. - * - * Directives held by this structure are "allow_create", "allow_mkdir", - * "allow_ioctl", "allow_mkfifo", "allow_mksock", "allow_chmod", "allow_chown" - * and "allow_chgrp". - * + * Structure for "file create", "file mkdir", "file mkfifo", "file mksock", + * "file ioctl", "file chmod", "file chown" and "file chgrp" directive. */ struct tomoyo_path_number_acl { struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */ + /* Bitmask of values in "enum tomoyo_path_number_acl_index". */ u8 perm; struct tomoyo_name_union name; struct tomoyo_number_union number; }; -/* - * tomoyo_mkdev_acl is a structure which is used for holding an - * entry with one pathname and three numbers operation. - * It has following fields. - * - * (1) "head" which is a "struct tomoyo_acl_info". - * (2) "perm" which is a bitmask of permitted operations. - * (3) "mode" is the create mode. - * (4) "major" is the major number of device node. - * (5) "minor" is the minor number of device node. - * - * Directives held by this structure are "allow_mkchar", "allow_mkblock". - * - */ +/* Structure for "file mkblock" and "file mkchar" directive. */ struct tomoyo_mkdev_acl { struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */ - u8 perm; + u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */ struct tomoyo_name_union name; struct tomoyo_number_union mode; struct tomoyo_number_union major; @@ -462,38 +380,16 @@ struct tomoyo_mkdev_acl { }; /* - * tomoyo_path2_acl is a structure which is used for holding an - * entry with two pathnames operation (i.e. link(), rename() and pivot_root()). - * It has following fields. - * - * (1) "head" which is a "struct tomoyo_acl_info". - * (2) "perm" which is a bitmask of permitted operations. - * (3) "name1" is the source/old pathname. - * (4) "name2" is the destination/new pathname. - * - * Directives held by this structure are "allow_rename", "allow_link" and - * "allow_pivot_root". + * Structure for "file rename", "file link" and "file pivot_root" directive. */ struct tomoyo_path2_acl { struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */ - u8 perm; + u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */ struct tomoyo_name_union name1; struct tomoyo_name_union name2; }; -/* - * tomoyo_mount_acl is a structure which is used for holding an - * entry for mount operation. - * It has following fields. - * - * (1) "head" which is a "struct tomoyo_acl_info". - * (2) "dev_name" is the device name. - * (3) "dir_name" is the mount point. - * (4) "fs_type" is the filesystem type. - * (5) "flags" is the mount flags. - * - * Directive held by this structure is "allow_mount". - */ +/* Structure for "file mount" directive. */ struct tomoyo_mount_acl { struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */ struct tomoyo_name_union dev_name; @@ -550,18 +446,8 @@ struct tomoyo_io_buffer { }; /* - * tomoyo_transition_control is a structure which is used for holding - * "initialize_domain"/"no_initialize_domain"/"keep_domain"/"no_keep_domain" - * entries. - * It has following fields. - * - * (1) "head" is "struct tomoyo_acl_head". - * (2) "type" is type of this entry. - * (3) "is_last_name" is a bool which is true if "domainname" is "the last - * component of a domainname", false otherwise. - * (4) "domainname" which is "a domainname" or "the last component of a - * domainname". - * (5) "program" which is a program's pathname. + * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/ + * "no_keep_domain" keyword. */ struct tomoyo_transition_control { struct tomoyo_acl_head head; @@ -572,32 +458,14 @@ struct tomoyo_transition_control { const struct tomoyo_path_info *program; /* Maybe NULL */ }; -/* - * tomoyo_aggregator is a structure which is used for holding - * "aggregator" entries. - * It has following fields. - * - * (1) "head" is "struct tomoyo_acl_head". - * (2) "original_name" which is originally requested name. - * (3) "aggregated_name" which is name to rewrite. - */ +/* Structure for "aggregator" keyword. */ struct tomoyo_aggregator { struct tomoyo_acl_head head; const struct tomoyo_path_info *original_name; const struct tomoyo_path_info *aggregated_name; }; -/* - * tomoyo_manager is a structure which is used for holding list of - * domainnames or programs which are permitted to modify configuration via - * /sys/kernel/security/tomoyo/ interface. - * It has following fields. - * - * (1) "head" is "struct tomoyo_acl_head". - * (2) "is_domain" is a bool which is true if "manager" is a domainname, false - * otherwise. - * (3) "manager" is a domainname or a program's pathname. - */ +/* Structure for policy manager. */ struct tomoyo_manager { struct tomoyo_acl_head head; bool is_domain; /* True if manager is a domainname. */ @@ -612,6 +480,7 @@ struct tomoyo_preference { bool permissive_verbose; }; +/* Structure for /sys/kernel/security/tomnoyo/profile interface. */ struct tomoyo_profile { const struct tomoyo_path_info *comment; struct tomoyo_preference *learning; @@ -624,148 +493,80 @@ struct tomoyo_profile { /********** Function prototypes. **********/ -/* Check whether the given string starts with the given keyword. */ bool tomoyo_str_starts(char **src, const char *find); -/* Get tomoyo_realpath() of current process. */ const char *tomoyo_get_exe(void); -/* Format string. */ void tomoyo_normalize_line(unsigned char *buffer); -/* Print warning or error message on console. */ void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...) __attribute__ ((format(printf, 2, 3))); -/* Check all profiles currently assigned to domains are defined. */ void tomoyo_check_profile(void); -/* Open operation for /sys/kernel/security/tomoyo/ interface. */ int tomoyo_open_control(const u8 type, struct file *file); -/* Close /sys/kernel/security/tomoyo/ interface. */ int tomoyo_close_control(struct file *file); -/* Poll operation for /sys/kernel/security/tomoyo/ interface. */ int tomoyo_poll_control(struct file *file, poll_table *wait); -/* Read operation for /sys/kernel/security/tomoyo/ interface. */ int tomoyo_read_control(struct file *file, char __user *buffer, const int buffer_len); -/* Write operation for /sys/kernel/security/tomoyo/ interface. */ int tomoyo_write_control(struct file *file, const char __user *buffer, const int buffer_len); -/* Check whether the domain has too many ACL entries to hold. */ bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r); -/* Print out of memory warning message. */ void tomoyo_warn_oom(const char *function); -/* Check whether the given name matches the given name_union. */ const struct tomoyo_path_info * tomoyo_compare_name_union(const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr); -/* Check whether the given number matches the given number_union. */ bool tomoyo_compare_number_union(const unsigned long value, const struct tomoyo_number_union *ptr); int tomoyo_get_mode(const u8 profile, const u8 index); void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...) __attribute__ ((format(printf, 2, 3))); -/* Check whether the domainname is correct. */ bool tomoyo_correct_domain(const unsigned char *domainname); -/* Check whether the token is correct. */ bool tomoyo_correct_path(const char *filename); bool tomoyo_correct_word(const char *string); -/* Check whether the token can be a domainname. */ bool tomoyo_domain_def(const unsigned char *buffer); bool tomoyo_parse_name_union(const char *filename, struct tomoyo_name_union *ptr); -/* Check whether the given filename matches the given path_group. */ const struct tomoyo_path_info * tomoyo_path_matches_group(const struct tomoyo_path_info *pathname, const struct tomoyo_group *group); -/* Check whether the given value matches the given number_group. */ bool tomoyo_number_matches_group(const unsigned long min, const unsigned long max, const struct tomoyo_group *group); -/* Check whether the given filename matches the given pattern. */ bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename, const struct tomoyo_path_info *pattern); - bool tomoyo_parse_number_union(char *data, struct tomoyo_number_union *num); -/* Tokenize a line. */ bool tomoyo_tokenize(char *buffer, char *w[], size_t size); -/* Write domain policy violation warning message to console? */ bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain); -/* Fill "struct tomoyo_request_info". */ int tomoyo_init_request_info(struct tomoyo_request_info *r, struct tomoyo_domain_info *domain, const u8 index); -/* Check permission for mount operation. */ -int tomoyo_mount_permission(char *dev_name, struct path *path, char *type, - unsigned long flags, void *data_page); -/* Create "aggregator" entry in exception policy. */ +int tomoyo_mount_permission(char *dev_name, struct path *path, + const char *type, unsigned long flags, + void *data_page); int tomoyo_write_aggregator(char *data, const bool is_delete); int tomoyo_write_transition_control(char *data, const bool is_delete, const u8 type); -/* - * Create "allow_execute", "allow_read", "allow_write", "allow_append", - * "allow_create", "allow_unlink", "allow_mkdir", "allow_rmdir", - * "allow_mkfifo", "allow_mksock", "allow_mkblock", "allow_mkchar", - * "allow_truncate", "allow_symlink", "allow_rename" and "allow_link" entry - * in domain policy. - */ int tomoyo_write_file(char *data, struct tomoyo_domain_info *domain, const bool is_delete); -/* Create "allow_mount" entry in domain policy. */ int tomoyo_write_mount(char *data, struct tomoyo_domain_info *domain, const bool is_delete); -/* Create "path_group"/"number_group" entry in exception policy. */ int tomoyo_write_group(char *data, const bool is_delete, const u8 type); int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...) __attribute__ ((format(printf, 2, 3))); -/* Find a domain by the given name. */ struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname); -/* Find or create a domain by the given name. */ struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname, const u8 profile); struct tomoyo_profile *tomoyo_profile(const u8 profile); -/* - * Allocate memory for "struct tomoyo_path_group"/"struct tomoyo_number_group". - */ struct tomoyo_group *tomoyo_get_group(const char *group_name, const u8 type); - -/* Check mode for specified functionality. */ unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain, const u8 index); -/* Fill in "struct tomoyo_path_info" members. */ void tomoyo_fill_path_info(struct tomoyo_path_info *ptr); -/* Run policy loader when /sbin/init starts. */ void tomoyo_load_policy(const char *filename); - void tomoyo_put_number_union(struct tomoyo_number_union *ptr); - -/* Convert binary string to ascii string. */ char *tomoyo_encode(const char *str); - -/* - * Returns realpath(3) of the given pathname except that - * ignores chroot'ed root and does not follow the final symlink. - */ char *tomoyo_realpath_nofollow(const char *pathname); -/* - * Returns realpath(3) of the given pathname except that - * ignores chroot'ed root and the pathname is already solved. - */ char *tomoyo_realpath_from_path(struct path *path); - -/* Check memory quota. */ bool tomoyo_memory_ok(void *ptr); void *tomoyo_commit_ok(void *data, const unsigned int size); - -/* - * Keep the given name on the RAM. - * The RAM is shared, so NEVER try to modify or kfree() the returned name. - */ const struct tomoyo_path_info *tomoyo_get_name(const char *name); - -/* Check for memory usage. */ void tomoyo_read_memory_counter(struct tomoyo_io_buffer *head); - -/* Set memory quota. */ int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head); - -/* Initialize mm related code. */ void __init tomoyo_mm_init(void); int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation, const struct tomoyo_path_info *filename); @@ -779,18 +580,11 @@ int tomoyo_path_perm(const u8 operation, struct path *path); int tomoyo_path2_perm(const u8 operation, struct path *path1, struct path *path2); int tomoyo_find_next_domain(struct linux_binprm *bprm); - void tomoyo_print_ulong(char *buffer, const int buffer_len, const unsigned long value, const u8 type); - -/* Drop refcount on tomoyo_name_union. */ void tomoyo_put_name_union(struct tomoyo_name_union *ptr); - -/* Run garbage collector. */ void tomoyo_run_gc(void); - void tomoyo_memory_free(void *ptr); - 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 @@ -841,17 +635,36 @@ extern unsigned int tomoyo_query_memory_size; /********** Inlined functions. **********/ +/** + * tomoyo_read_lock - Take lock for protecting policy. + * + * Returns index number for tomoyo_read_unlock(). + */ static inline int tomoyo_read_lock(void) { return srcu_read_lock(&tomoyo_ss); } +/** + * tomoyo_read_unlock - Release lock for protecting policy. + * + * @idx: Index number returned by tomoyo_read_lock(). + * + * Returns nothing. + */ static inline void tomoyo_read_unlock(int idx) { srcu_read_unlock(&tomoyo_ss, idx); } -/* strcmp() for "struct tomoyo_path_info" structure. */ +/** + * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure. + * + * @a: Pointer to "struct tomoyo_path_info". + * @b: Pointer to "struct tomoyo_path_info". + * + * Returns true if @a == @b, false otherwise. + */ static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a, const struct tomoyo_path_info *b) { @@ -882,6 +695,13 @@ static inline bool tomoyo_invalid(const unsigned char c) return c && (c <= ' ' || c >= 127); } +/** + * tomoyo_put_name - Drop reference on "struct tomoyo_name". + * + * @name: Pointer to "struct tomoyo_path_info". Maybe NULL. + * + * Returns nothing. + */ static inline void tomoyo_put_name(const struct tomoyo_path_info *name) { if (name) { @@ -891,17 +711,36 @@ static inline void tomoyo_put_name(const struct tomoyo_path_info *name) } } +/** + * tomoyo_put_group - Drop reference on "struct tomoyo_group". + * + * @group: Pointer to "struct tomoyo_group". Maybe NULL. + * + * Returns nothing. + */ static inline void tomoyo_put_group(struct tomoyo_group *group) { if (group) atomic_dec(&group->users); } +/** + * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread. + * + * Returns pointer to "struct tomoyo_domain_info" for current thread. + */ static inline struct tomoyo_domain_info *tomoyo_domain(void) { return current_cred()->security; } +/** + * tomoyo_real_domain - Get "struct tomoyo_domain_info" for specified thread. + * + * @task: Pointer to "struct task_struct". + * + * Returns pointer to "struct tomoyo_security" for specified thread. + */ static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct *task) { @@ -909,24 +748,40 @@ static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct } static inline bool tomoyo_same_acl_head(const struct tomoyo_acl_info *p1, - const struct tomoyo_acl_info *p2) + const struct tomoyo_acl_info *p2) { return p1->type == p2->type; } +/** + * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry. + * + * @a: Pointer to "struct tomoyo_name_union". + * @b: Pointer to "struct tomoyo_name_union". + * + * Returns true if @a == @b, false otherwise. + */ static inline bool tomoyo_same_name_union -(const struct tomoyo_name_union *p1, const struct tomoyo_name_union *p2) +(const struct tomoyo_name_union *a, const struct tomoyo_name_union *b) { - return p1->filename == p2->filename && p1->group == p2->group && - p1->is_group == p2->is_group; + return a->filename == b->filename && a->group == b->group && + a->is_group == b->is_group; } +/** + * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry. + * + * @a: Pointer to "struct tomoyo_number_union". + * @b: Pointer to "struct tomoyo_number_union". + * + * Returns true if @a == @b, false otherwise. + */ static inline bool tomoyo_same_number_union -(const struct tomoyo_number_union *p1, const struct tomoyo_number_union *p2) +(const struct tomoyo_number_union *a, const struct tomoyo_number_union *b) { - return p1->values[0] == p2->values[0] && p1->values[1] == p2->values[1] - && p1->group == p2->group && p1->min_type == p2->min_type && - p1->max_type == p2->max_type && p1->is_group == p2->is_group; + return a->values[0] == b->values[0] && a->values[1] == b->values[1] && + a->group == b->group && a->min_type == b->min_type && + a->max_type == b->max_type && a->is_group == b->is_group; } /** diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c index 41ed7de44ef..33238028807 100644 --- a/security/tomoyo/file.c +++ b/security/tomoyo/file.c @@ -212,8 +212,7 @@ static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r) /** * tomoyo_audit_path_number_log - Audit path/number request log. * - * @r: Pointer to "struct tomoyo_request_info". - * @error: Error code. + * @r: Pointer to "struct tomoyo_request_info". * * Returns 0 on success, negative value otherwise. */ diff --git a/security/tomoyo/mount.c b/security/tomoyo/mount.c index f1d9e1a9eff..5cfc7207874 100644 --- a/security/tomoyo/mount.c +++ b/security/tomoyo/mount.c @@ -7,22 +7,16 @@ #include <linux/slab.h> #include "common.h" -/* Keywords for mount restrictions. */ - -/* Allow to call 'mount --bind /source_dir /dest_dir' */ -#define TOMOYO_MOUNT_BIND_KEYWORD "--bind" -/* Allow to call 'mount --move /old_dir /new_dir ' */ -#define TOMOYO_MOUNT_MOVE_KEYWORD "--move" -/* Allow to call 'mount -o remount /dir ' */ -#define TOMOYO_MOUNT_REMOUNT_KEYWORD "--remount" -/* Allow to call 'mount --make-unbindable /dir' */ -#define TOMOYO_MOUNT_MAKE_UNBINDABLE_KEYWORD "--make-unbindable" -/* Allow to call 'mount --make-private /dir' */ -#define TOMOYO_MOUNT_MAKE_PRIVATE_KEYWORD "--make-private" -/* Allow to call 'mount --make-slave /dir' */ -#define TOMOYO_MOUNT_MAKE_SLAVE_KEYWORD "--make-slave" -/* Allow to call 'mount --make-shared /dir' */ -#define TOMOYO_MOUNT_MAKE_SHARED_KEYWORD "--make-shared" +/* String table for special mount operations. */ +static const char * const tomoyo_mounts[TOMOYO_MAX_SPECIAL_MOUNT] = { + [TOMOYO_MOUNT_BIND] = "--bind", + [TOMOYO_MOUNT_MOVE] = "--move", + [TOMOYO_MOUNT_REMOUNT] = "--remount", + [TOMOYO_MOUNT_MAKE_UNBINDABLE] = "--make-unbindable", + [TOMOYO_MOUNT_MAKE_PRIVATE] = "--make-private", + [TOMOYO_MOUNT_MAKE_SLAVE] = "--make-slave", + [TOMOYO_MOUNT_MAKE_SHARED] = "--make-shared", +}; /** * tomoyo_audit_mount_log - Audit mount log. @@ -39,22 +33,21 @@ static int tomoyo_audit_mount_log(struct tomoyo_request_info *r) const unsigned long flags = r->param.mount.flags; if (r->granted) return 0; - if (!strcmp(type, TOMOYO_MOUNT_REMOUNT_KEYWORD)) + if (type == tomoyo_mounts[TOMOYO_MOUNT_REMOUNT]) tomoyo_warn_log(r, "mount -o remount %s 0x%lX", dir, flags); - else if (!strcmp(type, TOMOYO_MOUNT_BIND_KEYWORD) - || !strcmp(type, TOMOYO_MOUNT_MOVE_KEYWORD)) + else if (type == tomoyo_mounts[TOMOYO_MOUNT_BIND] + || type == tomoyo_mounts[TOMOYO_MOUNT_MOVE]) tomoyo_warn_log(r, "mount %s %s %s 0x%lX", type, dev, dir, flags); - else if (!strcmp(type, TOMOYO_MOUNT_MAKE_UNBINDABLE_KEYWORD) || - !strcmp(type, TOMOYO_MOUNT_MAKE_PRIVATE_KEYWORD) || - !strcmp(type, TOMOYO_MOUNT_MAKE_SLAVE_KEYWORD) || - !strcmp(type, TOMOYO_MOUNT_MAKE_SHARED_KEYWORD)) + else if (type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE] || + type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE] || + type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE] || + type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED]) tomoyo_warn_log(r, "mount %s %s 0x%lX", type, dir, flags); else tomoyo_warn_log(r, "mount -t %s %s %s 0x%lX", type, dev, dir, flags); - return tomoyo_supervisor(r, - TOMOYO_KEYWORD_ALLOW_MOUNT "%s %s %s 0x%lX\n", + return tomoyo_supervisor(r, "allow_mount %s %s %s 0x%lX\n", r->param.mount.dev->name, r->param.mount.dir->name, type, flags); } @@ -85,7 +78,8 @@ static bool tomoyo_check_mount_acl(struct tomoyo_request_info *r, * Caller holds tomoyo_read_lock(). */ static int tomoyo_mount_acl(struct tomoyo_request_info *r, char *dev_name, - struct path *dir, char *type, unsigned long flags) + struct path *dir, const char *type, + unsigned long flags) { struct path path; struct file_system_type *fstype = NULL; @@ -115,15 +109,15 @@ static int tomoyo_mount_acl(struct tomoyo_request_info *r, char *dev_name, tomoyo_fill_path_info(&rdir); /* Compare fs name. */ - if (!strcmp(type, TOMOYO_MOUNT_REMOUNT_KEYWORD)) { + if (type == tomoyo_mounts[TOMOYO_MOUNT_REMOUNT]) { /* dev_name is ignored. */ - } else if (!strcmp(type, TOMOYO_MOUNT_MAKE_UNBINDABLE_KEYWORD) || - !strcmp(type, TOMOYO_MOUNT_MAKE_PRIVATE_KEYWORD) || - !strcmp(type, TOMOYO_MOUNT_MAKE_SLAVE_KEYWORD) || - !strcmp(type, TOMOYO_MOUNT_MAKE_SHARED_KEYWORD)) { + } else if (type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE] || + type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE] || + type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE] || + type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED]) { /* dev_name is ignored. */ - } else if (!strcmp(type, TOMOYO_MOUNT_BIND_KEYWORD) || - !strcmp(type, TOMOYO_MOUNT_MOVE_KEYWORD)) { + } else if (type == tomoyo_mounts[TOMOYO_MOUNT_BIND] || + type == tomoyo_mounts[TOMOYO_MOUNT_MOVE]) { need_dev = -1; /* dev_name is a directory */ } else { fstype = get_fs_type(type); @@ -189,8 +183,9 @@ static int tomoyo_mount_acl(struct tomoyo_request_info *r, char *dev_name, * * Returns 0 on success, negative value otherwise. */ -int tomoyo_mount_permission(char *dev_name, struct path *path, char *type, - unsigned long flags, void *data_page) +int tomoyo_mount_permission(char *dev_name, struct path *path, + const char *type, unsigned long flags, + void *data_page) { struct tomoyo_request_info r; int error; @@ -202,31 +197,31 @@ int tomoyo_mount_permission(char *dev_name, struct path *path, char *type, if ((flags & MS_MGC_MSK) == MS_MGC_VAL) flags &= ~MS_MGC_MSK; if (flags & MS_REMOUNT) { - type = TOMOYO_MOUNT_REMOUNT_KEYWORD; + type = tomoyo_mounts[TOMOYO_MOUNT_REMOUNT]; flags &= ~MS_REMOUNT; } if (flags & MS_MOVE) { - type = TOMOYO_MOUNT_MOVE_KEYWORD; + type = tomoyo_mounts[TOMOYO_MOUNT_MOVE]; flags &= ~MS_MOVE; } if (flags & MS_BIND) { - type = TOMOYO_MOUNT_BIND_KEYWORD; + type = tomoyo_mounts[TOMOYO_MOUNT_BIND]; flags &= ~MS_BIND; } if (flags & MS_UNBINDABLE) { - type = TOMOYO_MOUNT_MAKE_UNBINDABLE_KEYWORD; + type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE]; flags &= ~MS_UNBINDABLE; } if (flags & MS_PRIVATE) { - type = TOMOYO_MOUNT_MAKE_PRIVATE_KEYWORD; + type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE]; flags &= ~MS_PRIVATE; } if (flags & MS_SLAVE) { - type = TOMOYO_MOUNT_MAKE_SLAVE_KEYWORD; + type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE]; flags &= ~MS_SLAVE; } if (flags & MS_SHARED) { - type = TOMOYO_MOUNT_MAKE_SHARED_KEYWORD; + type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED]; flags &= ~MS_SHARED; } if (!type) diff --git a/security/tomoyo/securityfs_if.c b/security/tomoyo/securityfs_if.c index e43d5554b50..a5bd76d7f6b 100644 --- a/security/tomoyo/securityfs_if.c +++ b/security/tomoyo/securityfs_if.c @@ -38,7 +38,7 @@ static int tomoyo_release(struct inode *inode, struct file *file) } /** - * tomoyo_poll - poll() for /proc/ccs/ interface. + * tomoyo_poll - poll() for /sys/kernel/security/tomoyo/ interface. * * @file: Pointer to "struct file". * @wait: Pointer to "poll_table". |