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TOMOYO: Cleanup part 2.

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Update (or temporarily remove) comments.
Remove or replace some of #define lines.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Tetsuo Handa 2011-06-26 23:16:03 +09:00 committed by James Morris
parent 7c75964f43
commit b5bc60b4ce
5 changed files with 204 additions and 359 deletions
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38
security/tomoyo/common.c
View file

@ -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);

441
security/tomoyo/common.h
View file

@ -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. */
/*
* Retry this request. Returned by tomoyo_supervisor() if policy violation has
* occurred in enforcing mode and the userspace daemon decided to retry.
*
* 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. **********/
/*
* tomoyo_acl_head is a structure which is used for holding elements not in
* domain policy.
* It has following fields.
*
* (1) "list" which is linked to tomoyo_policy_list[] .
* (2) "is_deleted" is a bool which is true if marked as deleted, false
* otherwise.
*/
/* 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;
}
/**

3
security/tomoyo/file.c
View file

@ -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.
*/

79
security/tomoyo/mount.c
View file

@ -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)

2
security/tomoyo/securityfs_if.c
View file

@ -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".