diff options
| -rw-r--r-- | security/tomoyo/common.c | 60 | ||||
| -rw-r--r-- | security/tomoyo/common.h | 93 | ||||
| -rw-r--r-- | security/tomoyo/domain.c | 13 | ||||
| -rw-r--r-- | security/tomoyo/file.c | 368 | ||||
| -rw-r--r-- | security/tomoyo/gc.c | 30 | ||||
| -rw-r--r-- | security/tomoyo/mount.c | 5 | ||||
| -rw-r--r-- | security/tomoyo/tomoyo.c | 14 | ||||
| -rw-r--r-- | security/tomoyo/util.c | 23 |
8 files changed, 71 insertions, 535 deletions
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c index a0d09e56874..0776173b7d2 100644 --- a/security/tomoyo/common.c +++ b/security/tomoyo/common.c @@ -39,13 +39,13 @@ static const char *tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX [TOMOYO_MAC_FILE_OPEN] = "file::open", [TOMOYO_MAC_FILE_CREATE] = "file::create", [TOMOYO_MAC_FILE_UNLINK] = "file::unlink", + [TOMOYO_MAC_FILE_GETATTR] = "file::getattr", [TOMOYO_MAC_FILE_MKDIR] = "file::mkdir", [TOMOYO_MAC_FILE_RMDIR] = "file::rmdir", [TOMOYO_MAC_FILE_MKFIFO] = "file::mkfifo", [TOMOYO_MAC_FILE_MKSOCK] = "file::mksock", [TOMOYO_MAC_FILE_TRUNCATE] = "file::truncate", [TOMOYO_MAC_FILE_SYMLINK] = "file::symlink", - [TOMOYO_MAC_FILE_REWRITE] = "file::rewrite", [TOMOYO_MAC_FILE_MKBLOCK] = "file::mkblock", [TOMOYO_MAC_FILE_MKCHAR] = "file::mkchar", [TOMOYO_MAC_FILE_LINK] = "file::link", @@ -881,10 +881,6 @@ static int tomoyo_write_domain(struct tomoyo_io_buffer *head) domain->profile = (u8) profile; return 0; } - if (!strcmp(data, TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ)) { - domain->ignore_global_allow_read = !is_delete; - return 0; - } if (!strcmp(data, TOMOYO_KEYWORD_QUOTA_EXCEEDED)) { domain->quota_warned = !is_delete; return 0; @@ -942,11 +938,6 @@ static bool tomoyo_print_entry(struct tomoyo_io_buffer *head, if (head->r.print_execute_only && bit != TOMOYO_TYPE_EXECUTE) continue; - /* Print "read/write" instead of "read" and "write". */ - if ((bit == TOMOYO_TYPE_READ || - bit == TOMOYO_TYPE_WRITE) - && (perm & (1 << TOMOYO_TYPE_READ_WRITE))) - continue; break; } if (bit >= TOMOYO_MAX_PATH_OPERATION) @@ -1055,10 +1046,6 @@ static void tomoyo_read_domain(struct tomoyo_io_buffer *head) tomoyo_set_string(head, "quota_exceeded\n"); if (domain->transition_failed) tomoyo_set_string(head, "transition_failed\n"); - if (domain->ignore_global_allow_read) - tomoyo_set_string(head, - TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ - "\n"); head->r.step++; tomoyo_set_lf(head); /* fall through */ @@ -1235,18 +1222,15 @@ static int tomoyo_write_exception(struct tomoyo_io_buffer *head) static const struct { const char *keyword; int (*write) (char *, const bool); - } tomoyo_callback[4] = { + } tomoyo_callback[1] = { { TOMOYO_KEYWORD_AGGREGATOR, tomoyo_write_aggregator }, - { TOMOYO_KEYWORD_FILE_PATTERN, tomoyo_write_pattern }, - { TOMOYO_KEYWORD_DENY_REWRITE, tomoyo_write_no_rewrite }, - { TOMOYO_KEYWORD_ALLOW_READ, tomoyo_write_globally_readable }, }; for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++) if (tomoyo_str_starts(&data, tomoyo_transition_type[i])) return tomoyo_write_transition_control(data, is_delete, i); - for (i = 0; i < 4; i++) + for (i = 0; i < 1; i++) if (tomoyo_str_starts(&data, tomoyo_callback[i].keyword)) return tomoyo_callback[i].write(data, is_delete); for (i = 0; i < TOMOYO_MAX_GROUP; i++) @@ -1336,15 +1320,6 @@ static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx) name); } break; - case TOMOYO_ID_GLOBALLY_READABLE: - { - struct tomoyo_readable_file *ptr = - container_of(acl, typeof(*ptr), head); - tomoyo_set_string(head, - TOMOYO_KEYWORD_ALLOW_READ); - tomoyo_set_string(head, ptr->filename->name); - } - break; case TOMOYO_ID_AGGREGATOR: { struct tomoyo_aggregator *ptr = @@ -1358,24 +1333,6 @@ static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx) ptr->aggregated_name->name); } break; - case TOMOYO_ID_PATTERN: - { - struct tomoyo_no_pattern *ptr = - container_of(acl, typeof(*ptr), head); - tomoyo_set_string(head, - TOMOYO_KEYWORD_FILE_PATTERN); - tomoyo_set_string(head, ptr->pattern->name); - } - break; - case TOMOYO_ID_NO_REWRITE: - { - struct tomoyo_no_rewrite *ptr = - container_of(acl, typeof(*ptr), head); - tomoyo_set_string(head, - TOMOYO_KEYWORD_DENY_REWRITE); - tomoyo_set_string(head, ptr->pattern->name); - } - break; default: continue; } @@ -1891,21 +1848,12 @@ int tomoyo_open_control(const u8 type, struct file *file) head->reader_idx = tomoyo_read_lock(); file->private_data = head; /* - * Call the handler now if the file is - * /sys/kernel/security/tomoyo/self_domain - * so that the user can use - * cat < /sys/kernel/security/tomoyo/self_domain" - * to know the current process's domainname. - */ - if (type == TOMOYO_SELFDOMAIN) - tomoyo_read_control(file, NULL, 0); - /* * If the file is /sys/kernel/security/tomoyo/query , increment the * observer counter. * The obserber counter is used by tomoyo_supervisor() to see if * there is some process monitoring /sys/kernel/security/tomoyo/query. */ - else if (type == TOMOYO_QUERY) + if (type == TOMOYO_QUERY) atomic_inc(&tomoyo_query_observers); return 0; } diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h index 7c66bd89878..a5d6e212b18 100644 --- a/security/tomoyo/common.h +++ b/security/tomoyo/common.h @@ -52,9 +52,6 @@ enum tomoyo_policy_id { TOMOYO_ID_NUMBER_GROUP, TOMOYO_ID_TRANSITION_CONTROL, TOMOYO_ID_AGGREGATOR, - TOMOYO_ID_GLOBALLY_READABLE, - TOMOYO_ID_PATTERN, - TOMOYO_ID_NO_REWRITE, TOMOYO_ID_MANAGER, TOMOYO_ID_NAME, TOMOYO_ID_ACL, @@ -73,8 +70,6 @@ enum tomoyo_group_id { #define TOMOYO_KEYWORD_ALLOW_MOUNT "allow_mount " #define TOMOYO_KEYWORD_ALLOW_READ "allow_read " #define TOMOYO_KEYWORD_DELETE "delete " -#define TOMOYO_KEYWORD_DENY_REWRITE "deny_rewrite " -#define TOMOYO_KEYWORD_FILE_PATTERN "file_pattern " #define TOMOYO_KEYWORD_INITIALIZE_DOMAIN "initialize_domain " #define TOMOYO_KEYWORD_KEEP_DOMAIN "keep_domain " #define TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN "no_initialize_domain " @@ -83,7 +78,6 @@ enum tomoyo_group_id { #define TOMOYO_KEYWORD_NUMBER_GROUP "number_group " #define TOMOYO_KEYWORD_SELECT "select " #define TOMOYO_KEYWORD_USE_PROFILE "use_profile " -#define TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "ignore_global_allow_read" #define TOMOYO_KEYWORD_QUOTA_EXCEEDED "quota_exceeded" #define TOMOYO_KEYWORD_TRANSITION_FAILED "transition_failed" /* A domain definition starts with <kernel>. */ @@ -115,35 +109,21 @@ enum tomoyo_acl_entry_type_index { }; /* Index numbers for File Controls. */ - -/* - * TOMOYO_TYPE_READ_WRITE is special. TOMOYO_TYPE_READ_WRITE is automatically - * set if both TOMOYO_TYPE_READ and TOMOYO_TYPE_WRITE are set. - * Both TOMOYO_TYPE_READ and TOMOYO_TYPE_WRITE are automatically set if - * TOMOYO_TYPE_READ_WRITE is set. - * TOMOYO_TYPE_READ_WRITE is automatically cleared if either TOMOYO_TYPE_READ - * or TOMOYO_TYPE_WRITE is cleared. - * Both TOMOYO_TYPE_READ and TOMOYO_TYPE_WRITE are automatically cleared if - * TOMOYO_TYPE_READ_WRITE is cleared. - */ - enum tomoyo_path_acl_index { - TOMOYO_TYPE_READ_WRITE, TOMOYO_TYPE_EXECUTE, TOMOYO_TYPE_READ, TOMOYO_TYPE_WRITE, + TOMOYO_TYPE_APPEND, TOMOYO_TYPE_UNLINK, + TOMOYO_TYPE_GETATTR, TOMOYO_TYPE_RMDIR, TOMOYO_TYPE_TRUNCATE, TOMOYO_TYPE_SYMLINK, - TOMOYO_TYPE_REWRITE, TOMOYO_TYPE_CHROOT, TOMOYO_TYPE_UMOUNT, TOMOYO_MAX_PATH_OPERATION }; -#define TOMOYO_RW_MASK ((1 << TOMOYO_TYPE_READ) | (1 << TOMOYO_TYPE_WRITE)) - enum tomoyo_mkdev_acl_index { TOMOYO_TYPE_MKBLOCK, TOMOYO_TYPE_MKCHAR, @@ -187,13 +167,13 @@ enum tomoyo_mac_index { TOMOYO_MAC_FILE_OPEN, TOMOYO_MAC_FILE_CREATE, TOMOYO_MAC_FILE_UNLINK, + TOMOYO_MAC_FILE_GETATTR, TOMOYO_MAC_FILE_MKDIR, TOMOYO_MAC_FILE_RMDIR, TOMOYO_MAC_FILE_MKFIFO, TOMOYO_MAC_FILE_MKSOCK, TOMOYO_MAC_FILE_TRUNCATE, TOMOYO_MAC_FILE_SYMLINK, - TOMOYO_MAC_FILE_REWRITE, TOMOYO_MAC_FILE_MKBLOCK, TOMOYO_MAC_FILE_MKCHAR, TOMOYO_MAC_FILE_LINK, @@ -388,9 +368,7 @@ struct tomoyo_acl_info { * "deleted", false otherwise. * (6) "quota_warned" is a bool which is used for suppressing warning message * when learning mode learned too much entries. - * (7) "ignore_global_allow_read" is a bool which is true if this domain - * should ignore "allow_read" directive in exception policy. - * (8) "transition_failed" is a bool which is set to true when this domain was + * (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() @@ -415,7 +393,6 @@ struct tomoyo_domain_info { u8 profile; /* Profile number to use. */ bool is_deleted; /* Delete flag. */ bool quota_warned; /* Quota warnning flag. */ - bool ignore_global_allow_read; /* Ignore "allow_read" flag. */ bool transition_failed; /* Domain transition failed flag. */ atomic_t users; /* Number of referring credentials. */ }; @@ -429,10 +406,9 @@ struct tomoyo_domain_info { * (2) "perm" which is a bitmask of permitted operations. * (3) "name" is the pathname. * - * Directives held by this structure are "allow_read/write", "allow_execute", - * "allow_read", "allow_write", "allow_unlink", "allow_rmdir", - * "allow_truncate", "allow_symlink", "allow_rewrite", "allow_chroot" and - * "allow_unmount". + * 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". */ struct tomoyo_path_acl { struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */ @@ -574,47 +550,6 @@ struct tomoyo_io_buffer { }; /* - * tomoyo_readable_file is a structure which is used for holding - * "allow_read" entries. - * It has following fields. - * - * (1) "head" is "struct tomoyo_acl_head". - * (2) "filename" is a pathname which is allowed to open(O_RDONLY). - */ -struct tomoyo_readable_file { - struct tomoyo_acl_head head; - const struct tomoyo_path_info *filename; -}; - -/* - * tomoyo_no_pattern is a structure which is used for holding - * "file_pattern" entries. - * It has following fields. - * - * (1) "head" is "struct tomoyo_acl_head". - * (2) "pattern" is a pathname pattern which is used for converting pathnames - * to pathname patterns during learning mode. - */ -struct tomoyo_no_pattern { - struct tomoyo_acl_head head; - const struct tomoyo_path_info *pattern; -}; - -/* - * tomoyo_no_rewrite is a structure which is used for holding - * "deny_rewrite" entries. - * It has following fields. - * - * (1) "head" is "struct tomoyo_acl_head". - * (2) "pattern" is a pathname which is by default not permitted to modify - * already existing content. - */ -struct tomoyo_no_rewrite { - struct tomoyo_acl_head head; - const struct tomoyo_path_info *pattern; -}; - -/* * tomoyo_transition_control is a structure which is used for holding * "initialize_domain"/"no_initialize_domain"/"keep_domain"/"no_keep_domain" * entries. @@ -764,23 +699,17 @@ 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_read/write", "allow_execute", "allow_read", "allow_write", + * 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_rewrite", "allow_rename" and - * "allow_link" entry in domain policy. + * "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_read" entry in exception policy. */ -int tomoyo_write_globally_readable(char *data, 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 "deny_rewrite" entry in exception policy. */ -int tomoyo_write_no_rewrite(char *data, const bool is_delete); -/* Create "file_pattern" entry in exception policy. */ -int tomoyo_write_pattern(char *data, 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, ...) @@ -819,8 +748,6 @@ char *tomoyo_realpath_nofollow(const char *pathname); * ignores chroot'ed root and the pathname is already solved. */ char *tomoyo_realpath_from_path(struct path *path); -/* Get patterned pathname. */ -const char *tomoyo_pattern(const struct tomoyo_path_info *filename); /* Check memory quota. */ bool tomoyo_memory_ok(void *ptr); diff --git a/security/tomoyo/domain.c b/security/tomoyo/domain.c index 35388408e47..355b536262b 100644 --- a/security/tomoyo/domain.c +++ b/security/tomoyo/domain.c @@ -510,17 +510,8 @@ int tomoyo_find_next_domain(struct linux_binprm *bprm) if (domain || strlen(tmp) >= TOMOYO_EXEC_TMPSIZE - 10) goto done; domain = tomoyo_find_domain(tmp); - if (domain) - goto done; - if (is_enforce) { - int error = tomoyo_supervisor(&r, "# wants to create domain\n" - "%s\n", tmp); - if (error == TOMOYO_RETRY_REQUEST) - goto retry; - if (error < 0) - goto done; - } - domain = tomoyo_assign_domain(tmp, old_domain->profile); + if (!domain) + domain = tomoyo_assign_domain(tmp, old_domain->profile); done: if (domain) goto out; diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c index d64e8ecb6fb..41ed7de44ef 100644 --- a/security/tomoyo/file.c +++ b/security/tomoyo/file.c @@ -11,15 +11,15 @@ /* Keyword array for operations with one pathname. */ const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = { - [TOMOYO_TYPE_READ_WRITE] = "read/write", [TOMOYO_TYPE_EXECUTE] = "execute", [TOMOYO_TYPE_READ] = "read", [TOMOYO_TYPE_WRITE] = "write", + [TOMOYO_TYPE_APPEND] = "append", [TOMOYO_TYPE_UNLINK] = "unlink", + [TOMOYO_TYPE_GETATTR] = "getattr", [TOMOYO_TYPE_RMDIR] = "rmdir", [TOMOYO_TYPE_TRUNCATE] = "truncate", [TOMOYO_TYPE_SYMLINK] = "symlink", - [TOMOYO_TYPE_REWRITE] = "rewrite", [TOMOYO_TYPE_CHROOT] = "chroot", [TOMOYO_TYPE_UMOUNT] = "unmount", }; @@ -50,15 +50,15 @@ const char *tomoyo_path_number_keyword[TOMOYO_MAX_PATH_NUMBER_OPERATION] = { }; static const u8 tomoyo_p2mac[TOMOYO_MAX_PATH_OPERATION] = { - [TOMOYO_TYPE_READ_WRITE] = TOMOYO_MAC_FILE_OPEN, [TOMOYO_TYPE_EXECUTE] = TOMOYO_MAC_FILE_EXECUTE, [TOMOYO_TYPE_READ] = TOMOYO_MAC_FILE_OPEN, [TOMOYO_TYPE_WRITE] = TOMOYO_MAC_FILE_OPEN, + [TOMOYO_TYPE_APPEND] = TOMOYO_MAC_FILE_OPEN, [TOMOYO_TYPE_UNLINK] = TOMOYO_MAC_FILE_UNLINK, + [TOMOYO_TYPE_GETATTR] = TOMOYO_MAC_FILE_GETATTR, [TOMOYO_TYPE_RMDIR] = TOMOYO_MAC_FILE_RMDIR, [TOMOYO_TYPE_TRUNCATE] = TOMOYO_MAC_FILE_TRUNCATE, [TOMOYO_TYPE_SYMLINK] = TOMOYO_MAC_FILE_SYMLINK, - [TOMOYO_TYPE_REWRITE] = TOMOYO_MAC_FILE_REWRITE, [TOMOYO_TYPE_CHROOT] = TOMOYO_MAC_FILE_CHROOT, [TOMOYO_TYPE_UMOUNT] = TOMOYO_MAC_FILE_UMOUNT, }; @@ -132,24 +132,6 @@ static void tomoyo_add_slash(struct tomoyo_path_info *buf) } /** - * tomoyo_strendswith - Check whether the token ends with the given token. - * - * @name: The token to check. - * @tail: The token to find. - * - * Returns true if @name ends with @tail, false otherwise. - */ -static bool tomoyo_strendswith(const char *name, const char *tail) -{ - int len; - - if (!name || !tail) - return false; - len = strlen(name) - strlen(tail); - return len >= 0 && !strcmp(name + len, tail); -} - -/** * tomoyo_get_realpath - Get realpath. * * @buf: Pointer to "struct tomoyo_path_info". @@ -182,7 +164,7 @@ static int tomoyo_audit_path_log(struct tomoyo_request_info *r) return 0; tomoyo_warn_log(r, "%s %s", operation, filename->name); return tomoyo_supervisor(r, "allow_%s %s\n", operation, - tomoyo_pattern(filename)); + filename->name); } /** @@ -202,8 +184,7 @@ static int tomoyo_audit_path2_log(struct tomoyo_request_info *r) tomoyo_warn_log(r, "%s %s %s", operation, filename1->name, filename2->name); return tomoyo_supervisor(r, "allow_%s %s %s\n", operation, - tomoyo_pattern(filename1), - tomoyo_pattern(filename2)); + filename1->name, filename2->name); } /** @@ -225,7 +206,7 @@ static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r) tomoyo_warn_log(r, "%s %s 0%o %u %u", operation, filename->name, mode, major, minor); return tomoyo_supervisor(r, "allow_%s %s 0%o %u %u\n", operation, - tomoyo_pattern(filename), mode, major, minor); + filename->name, mode, major, minor); } /** @@ -264,247 +245,7 @@ static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r) radix); tomoyo_warn_log(r, "%s %s %s", operation, filename->name, buffer); return tomoyo_supervisor(r, "allow_%s %s %s\n", operation, - tomoyo_pattern(filename), buffer); -} - -static bool tomoyo_same_globally_readable(const struct tomoyo_acl_head *a, - const struct tomoyo_acl_head *b) -{ - return container_of(a, struct tomoyo_readable_file, - head)->filename == - container_of(b, struct tomoyo_readable_file, - head)->filename; -} - -/** - * tomoyo_update_globally_readable_entry - Update "struct tomoyo_readable_file" list. - * - * @filename: Filename unconditionally permitted to open() for reading. - * @is_delete: True if it is a delete request. - * - * Returns 0 on success, negative value otherwise. - * - * Caller holds tomoyo_read_lock(). - */ -static int tomoyo_update_globally_readable_entry(const char *filename, - const bool is_delete) -{ - struct tomoyo_readable_file e = { }; - int error; - - if (!tomoyo_correct_word(filename)) - return -EINVAL; - e.filename = tomoyo_get_name(filename); - if (!e.filename) - return -ENOMEM; - error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, - &tomoyo_policy_list - [TOMOYO_ID_GLOBALLY_READABLE], - tomoyo_same_globally_readable); - tomoyo_put_name(e.filename); - return error; -} - -/** - * tomoyo_globally_readable_file - Check if the file is unconditionnaly permitted to be open()ed for reading. - * - * @filename: The filename to check. - * - * Returns true if any domain can open @filename for reading, false otherwise. - * - * Caller holds tomoyo_read_lock(). - */ -static bool tomoyo_globally_readable_file(const struct tomoyo_path_info * - filename) -{ - struct tomoyo_readable_file *ptr; - bool found = false; - - list_for_each_entry_rcu(ptr, &tomoyo_policy_list - [TOMOYO_ID_GLOBALLY_READABLE], head.list) { - if (!ptr->head.is_deleted && - tomoyo_path_matches_pattern(filename, ptr->filename)) { - found = true; - break; - } - } - return found; -} - -/** - * tomoyo_write_globally_readable - Write "struct tomoyo_readable_file" list. - * - * @data: String to parse. - * @is_delete: True if it is a delete request. - * - * Returns 0 on success, negative value otherwise. - * - * Caller holds tomoyo_read_lock(). - */ -int tomoyo_write_globally_readable(char *data, const bool is_delete) -{ - return tomoyo_update_globally_readable_entry(data, is_delete); -} - -static bool tomoyo_same_pattern(const struct tomoyo_acl_head *a, - const struct tomoyo_acl_head *b) -{ - return container_of(a, struct tomoyo_no_pattern, head)->pattern == - container_of(b, struct tomoyo_no_pattern, head)->pattern; -} - -/** - * tomoyo_update_file_pattern_entry - Update "struct tomoyo_no_pattern" list. - * - * @pattern: Pathname pattern. - * @is_delete: True if it is a delete request. - * - * Returns 0 on success, negative value otherwise. - * - * Caller holds tomoyo_read_lock(). - */ -static int tomoyo_update_file_pattern_entry(const char *pattern, - const bool is_delete) -{ - struct tomoyo_no_pattern e = { }; - int error; - - if (!tomoyo_correct_word(pattern)) - return -EINVAL; - e.pattern = tomoyo_get_name(pattern); - if (!e.pattern) - return -ENOMEM; - error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, - &tomoyo_policy_list[TOMOYO_ID_PATTERN], - tomoyo_same_pattern); - tomoyo_put_name(e.pattern); - return error; -} - -/** - * tomoyo_pattern - Get patterned pathname. - * - * @filename: The filename to find patterned pathname. - * - * Returns pointer to pathname pattern if matched, @filename otherwise. - * - * Caller holds tomoyo_read_lock(). - */ -const char *tomoyo_pattern(const struct tomoyo_path_info *filename) -{ - struct tomoyo_no_pattern *ptr; - const struct tomoyo_path_info *pattern = NULL; - - list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_PATTERN], - head.list) { - if (ptr->head.is_deleted) - continue; - if (!tomoyo_path_matches_pattern(filename, ptr->pattern)) - continue; - pattern = ptr->pattern; - if (tomoyo_strendswith(pattern->name, "/\\*")) { - /* Do nothing. Try to find the better match. */ - } else { - /* This would be the better match. Use this. */ - break; - } - } - if (pattern) - filename = pattern; - return filename->name; -} - -/** - * tomoyo_write_pattern - Write "struct tomoyo_no_pattern" list. - * - * @data: String to parse. - * @is_delete: True if it is a delete request. - * - * Returns 0 on success, negative value otherwise. - * - * Caller holds tomoyo_read_lock(). - */ -int tomoyo_write_pattern(char *data, const bool is_delete) -{ - return tomoyo_update_file_pattern_entry(data, is_delete); -} - -static bool tomoyo_same_no_rewrite(const struct tomoyo_acl_head *a, - const struct tomoyo_acl_head *b) -{ - return container_of(a, struct tomoyo_no_rewrite, head)->pattern - == container_of(b, struct tomoyo_no_rewrite, head) - ->pattern; -} - -/** - * tomoyo_update_no_rewrite_entry - Update "struct tomoyo_no_rewrite" list. - * - * @pattern: Pathname pattern that are not rewritable by default. - * @is_delete: True if it is a delete request. - * - * Returns 0 on success, negative value otherwise. - * - * Caller holds tomoyo_read_lock(). - */ -static int tomoyo_update_no_rewrite_entry(const char *pattern, - const bool is_delete) -{ - struct tomoyo_no_rewrite e = { }; - int error; - - if (!tomoyo_correct_word(pattern)) - return -EINVAL; - e.pattern = tomoyo_get_name(pattern); - if (!e.pattern) - return -ENOMEM; - error = tomoyo_update_policy(&e.head, sizeof(e), is_delete, - &tomoyo_policy_list[TOMOYO_ID_NO_REWRITE], - tomoyo_same_no_rewrite); - tomoyo_put_name(e.pattern); - return error; -} - -/** - * tomoyo_no_rewrite_file - Check if the given pathname is not permitted to be rewrited. - * - * @filename: Filename to check. - * - * Returns true if @filename is specified by "deny_rewrite" directive, - * false otherwise. - * - * Caller holds tomoyo_read_lock(). - */ -static bool tomoyo_no_rewrite_file(const struct tomoyo_path_info *filename) -{ - struct tomoyo_no_rewrite *ptr; - bool found = false; - - list_for_each_entry_rcu(ptr, &tomoyo_policy_list[TOMOYO_ID_NO_REWRITE], - head.list) { - if (ptr->head.is_deleted) - continue; - if (!tomoyo_path_matches_pattern(filename, ptr->pattern)) - continue; - found = true; - break; - } - return found; -} - -/** - * tomoyo_write_no_rewrite - Write "struct tomoyo_no_rewrite" list. - * - * @data: String to parse. - * @is_delete: True if it is a delete request. - * - * Returns 0 on success, negative value otherwise. - * - * Caller holds tomoyo_read_lock(). - */ -int tomoyo_write_no_rewrite(char *data, const bool is_delete) -{ - return tomoyo_update_no_rewrite_entry(data, is_delete); + filename->name, buffer); } static bool tomoyo_check_path_acl(struct tomoyo_request_info *r, @@ -569,6 +310,15 @@ static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a, tomoyo_same_name_union(&p1->name, &p2->name); } +/** + * tomoyo_merge_path_acl - Merge duplicated "struct tomoyo_path_acl" entry. + * + * @a: Pointer to "struct tomoyo_acl_info". + * @b: Pointer to "struct tomoyo_acl_info". + * @is_delete: True for @a &= ~@b, false for @a |= @b. + * + * Returns true if @a is empty, false otherwise. + */ static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a, struct tomoyo_acl_info *b, const bool is_delete) @@ -577,19 +327,10 @@ static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a, ->perm; u16 perm = *a_perm; const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm; - if (is_delete) { + if (is_delete) perm &= ~b_perm; - if ((perm & TOMOYO_RW_MASK) != TOMOYO_RW_MASK) - perm &= ~(1 << TOMOYO_TYPE_READ_WRITE); - else if (!(perm & (1 << TOMOYO_TYPE_READ_WRITE))) - perm &= ~TOMOYO_RW_MASK; - } else { + else perm |= b_perm; - if ((perm & TOMOYO_RW_MASK) == TOMOYO_RW_MASK) - perm |= (1 << TOMOYO_TYPE_READ_WRITE); - else if (perm & (1 << TOMOYO_TYPE_READ_WRITE)) - perm |= TOMOYO_RW_MASK; - } *a_perm = perm; return !perm; } @@ -615,8 +356,6 @@ static int tomoyo_update_path_acl(const u8 type, const char *filename, .perm = 1 << type }; int error; - if (e.perm == (1 << TOMOYO_TYPE_READ_WRITE)) - e.perm |= TOMOYO_RW_MASK; if (!tomoyo_parse_name_union(filename, &e.name)) return -EINVAL; error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain, @@ -775,7 +514,6 @@ int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation, { int error; - next: r->type = tomoyo_p2mac[operation]; r->mode = tomoyo_get_mode(r->profile, r->type); if (r->mode == TOMOYO_CONFIG_DISABLED) @@ -785,10 +523,6 @@ int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation, r->param.path.operation = operation; do { tomoyo_check_acl(r, tomoyo_check_path_acl); - if (!r->granted && operation == TOMOYO_TYPE_READ && - !r->domain->ignore_global_allow_read && - tomoyo_globally_readable_file(filename)) - r->granted = true; error = tomoyo_audit_path_log(r); /* * Do not retry for execute request, for alias may have @@ -796,16 +530,6 @@ int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation, */ } while (error == TOMOYO_RETRY_REQUEST && operation != TOMOYO_TYPE_EXECUTE); - /* - * Since "allow_truncate" doesn't imply "allow_rewrite" permission, - * we need to check "allow_rewrite" permission if the filename is - * specified by "deny_rewrite" keyword. - */ - if (!error && operation == TOMOYO_TYPE_TRUNCATE && - tomoyo_no_rewrite_file(filename)) { - operation = TOMOYO_TYPE_REWRITE; - goto next; - } return error; } @@ -932,43 +656,26 @@ int tomoyo_check_open_permission(struct tomoyo_domain_info *domain, struct tomoyo_request_info r; int idx; - if (!path->mnt || - (path->dentry->d_inode && S_ISDIR(path->dentry->d_inode->i_mode))) + if (!path->mnt) return 0; buf.name = NULL; r.mode = TOMOYO_CONFIG_DISABLED; idx = tomoyo_read_lock(); - /* - * If the filename is specified by "deny_rewrite" keyword, - * we need to check "allow_rewrite" permission when the filename is not - * opened for append mode or the filename is truncated at open time. - */ - if ((acc_mode & MAY_WRITE) && !(flag & O_APPEND) - && tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_REWRITE) + if (acc_mode && + tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN) != TOMOYO_CONFIG_DISABLED) { if (!tomoyo_get_realpath(&buf, path)) { error = -ENOMEM; goto out; } - if (tomoyo_no_rewrite_file(&buf)) - error = tomoyo_path_permission(&r, TOMOYO_TYPE_REWRITE, + if (acc_mode & MAY_READ) + error = tomoyo_path_permission(&r, TOMOYO_TYPE_READ, + &buf); + if (!error && (acc_mode & MAY_WRITE)) + error = tomoyo_path_permission(&r, (flag & O_APPEND) ? + TOMOYO_TYPE_APPEND : + TOMOYO_TYPE_WRITE, &buf); - } - if (!error && acc_mode && - tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN) - != TOMOYO_CONFIG_DISABLED) { - u8 operation; - if (!buf.name && !tomoyo_get_realpath(&buf, path)) { - error = -ENOMEM; - goto out; - } - if (acc_mode == (MAY_READ | MAY_WRITE)) - operation = TOMOYO_TYPE_READ_WRITE; - else if (acc_mode == MAY_READ) - operation = TOMOYO_TYPE_READ; - else - operation = TOMOYO_TYPE_WRITE; - error = tomoyo_path_permission(&r, operation, &buf); } out: kfree(buf.name); @@ -979,7 +686,7 @@ int tomoyo_check_open_permission(struct tomoyo_domain_info *domain, } /** - * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "rewrite", "chroot" and "unmount". + * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "append", "chroot" and "unmount". * * @operation: Type of operation. * @path: Pointer to "struct path". @@ -988,9 +695,10 @@ int tomoyo_check_open_permission(struct tomoyo_domain_info *domain, */ int tomoyo_path_perm(const u8 operation, struct path *path) { - int error = -ENOMEM; - struct tomoyo_path_info buf; struct tomoyo_request_info r; + int error; + struct tomoyo_path_info buf; + bool is_enforce; int idx; if (!path->mnt) @@ -998,17 +706,13 @@ int tomoyo_path_perm(const u8 operation, struct path *path) if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation]) == TOMOYO_CONFIG_DISABLED) return 0; + is_enforce = (r.mode == TOMOYO_CONFIG_ENFORCING); + error = -ENOMEM; buf.name = NULL; idx = tomoyo_read_lock(); if (!tomoyo_get_realpath(&buf, path)) goto out; switch (operation) { - case TOMOYO_TYPE_REWRITE: - if (!tomoyo_no_rewrite_file(&buf)) { - error = 0; - goto out; - } - break; case TOMOYO_TYPE_RMDIR: case TOMOYO_TYPE_CHROOT: tomoyo_add_slash(&buf); @@ -1018,7 +722,7 @@ int tomoyo_path_perm(const u8 operation, struct path *path) out: kfree(buf.name); tomoyo_read_unlock(idx); - if (r.mode != TOMOYO_CONFIG_ENFORCING) + if (!is_enforce) error = 0; return error; } diff --git a/security/tomoyo/gc.c b/security/tomoyo/gc.c index a877e4c3b10..ba799b49ee3 100644 --- a/security/tomoyo/gc.c +++ b/security/tomoyo/gc.c @@ -32,27 +32,6 @@ static bool tomoyo_add_to_gc(const int type, struct list_head *element) return true; } -static void tomoyo_del_allow_read(struct list_head *element) -{ - struct tomoyo_readable_file *ptr = - container_of(element, typeof(*ptr), head.list); - tomoyo_put_name(ptr->filename); -} - -static void tomoyo_del_file_pattern(struct list_head *element) -{ - struct tomoyo_no_pattern *ptr = - container_of(element, typeof(*ptr), head.list); - tomoyo_put_name(ptr->pattern); -} - -static void tomoyo_del_no_rewrite(struct list_head *element) -{ - struct tomoyo_no_rewrite *ptr = - container_of(element, typeof(*ptr), head.list); - tomoyo_put_name(ptr->pattern); -} - static void tomoyo_del_transition_control(struct list_head *element) { struct tomoyo_transition_control *ptr = @@ -290,15 +269,6 @@ static void tomoyo_kfree_entry(void) case TOMOYO_ID_AGGREGATOR: tomoyo_del_aggregator(element); break; - case TOMOYO_ID_GLOBALLY_READABLE: - tomoyo_del_allow_read(element); - break; - case TOMOYO_ID_PATTERN: - tomoyo_del_file_pattern(element); - break; - case TOMOYO_ID_NO_REWRITE: - tomoyo_del_no_rewrite(element); - break; case TOMOYO_ID_MANAGER: tomoyo_del_manager(element); break; diff --git a/security/tomoyo/mount.c b/security/tomoyo/mount.c index 162a864dba2..f1d9e1a9eff 100644 --- a/security/tomoyo/mount.c +++ b/security/tomoyo/mount.c @@ -55,9 +55,8 @@ static int tomoyo_audit_mount_log(struct tomoyo_request_info *r) flags); return tomoyo_supervisor(r, TOMOYO_KEYWORD_ALLOW_MOUNT "%s %s %s 0x%lX\n", - tomoyo_pattern(r->param.mount.dev), - tomoyo_pattern(r->param.mount.dir), type, - flags); + r->param.mount.dev->name, + r->param.mount.dir->name, type, flags); } static bool tomoyo_check_mount_acl(struct tomoyo_request_info *r, diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c index 95d3f957223..2615c7d4396 100644 --- a/security/tomoyo/tomoyo.c +++ b/security/tomoyo/tomoyo.c @@ -93,6 +93,12 @@ static int tomoyo_bprm_check_security(struct linux_binprm *bprm) return tomoyo_check_open_permission(domain, &bprm->file->f_path, O_RDONLY); } +static int tomoyo_inode_getattr(struct vfsmount *mnt, struct dentry *dentry) +{ + struct path path = { mnt, dentry }; + return tomoyo_path_perm(TOMOYO_TYPE_GETATTR, &path); +} + static int tomoyo_path_truncate(struct path *path) { return tomoyo_path_perm(TOMOYO_TYPE_TRUNCATE, path); @@ -176,9 +182,10 @@ static int tomoyo_path_rename(struct path *old_parent, static int tomoyo_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) { - if (cmd == F_SETFL && ((arg ^ file->f_flags) & O_APPEND)) - return tomoyo_path_perm(TOMOYO_TYPE_REWRITE, &file->f_path); - return 0; + if (!(cmd == F_SETFL && ((arg ^ file->f_flags) & O_APPEND))) + return 0; + return tomoyo_check_open_permission(tomoyo_domain(), &file->f_path, + O_WRONLY | (arg & O_APPEND)); } static int tomoyo_dentry_open(struct file *f, const struct cred *cred) @@ -258,6 +265,7 @@ static struct security_operations tomoyo_security_ops = { .path_mknod = tomoyo_path_mknod, .path_link = tomoyo_path_link, .path_rename = tomoyo_path_rename, + .inode_getattr = tomoyo_inode_getattr, .file_ioctl = tomoyo_file_ioctl, .path_chmod = tomoyo_path_chmod, .path_chown = tomoyo_path_chown, diff --git a/security/tomoyo/util.c b/security/tomoyo/util.c index 6d5393204d9..7fb9bbf7021 100644 --- a/security/tomoyo/util.c +++ b/security/tomoyo/util.c @@ -911,44 +911,33 @@ bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r) if (!domain) return true; list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { + u16 perm; + u8 i; if (ptr->is_deleted) continue; switch (ptr->type) { - u16 perm; - u8 i; case TOMOYO_TYPE_PATH_ACL: perm = container_of(ptr, struct tomoyo_path_acl, head) ->perm; - for (i = 0; i < TOMOYO_MAX_PATH_OPERATION; i++) - if (perm & (1 << i)) - count++; - if (perm & (1 << TOMOYO_TYPE_READ_WRITE)) - count -= 2; break; case TOMOYO_TYPE_PATH2_ACL: perm = container_of(ptr, struct tomoyo_path2_acl, head) ->perm; - for (i = 0; i < TOMOYO_MAX_PATH2_OPERATION; i++) - if (perm & (1 << i)) - count++; break; case TOMOYO_TYPE_PATH_NUMBER_ACL: perm = container_of(ptr, struct tomoyo_path_number_acl, head)->perm; - for (i = 0; i < TOMOYO_MAX_PATH_NUMBER_OPERATION; i++) - if (perm & (1 << i)) - count++; break; case TOMOYO_TYPE_MKDEV_ACL: perm = container_of(ptr, struct tomoyo_mkdev_acl, head)->perm; - for (i = 0; i < TOMOYO_MAX_MKDEV_OPERATION; i++) - if (perm & (1 << i)) - count++; break; default: - count++; + perm = 1; } + for (i = 0; i < 16; i++) + if (perm & (1 << i)) + count++; } if (count < tomoyo_profile(domain->profile)->learning-> learning_max_entry) |