*
* Common functions for TOMOYO.
*
- * Copyright (C) 2005-2009 NTT DATA CORPORATION
- *
- * Version: 2.2.0 2009/04/01
- *
+ * Copyright (C) 2005-2010 NTT DATA CORPORATION
*/
#include <linux/uaccess.h>
#include <linux/slab.h>
#include <linux/security.h>
-#include <linux/hardirq.h>
#include "common.h"
-/* Lock for protecting policy. */
-DEFINE_MUTEX(tomoyo_policy_lock);
+static struct tomoyo_profile tomoyo_default_profile = {
+ .learning = &tomoyo_default_profile.preference,
+ .permissive = &tomoyo_default_profile.preference,
+ .enforcing = &tomoyo_default_profile.preference,
+ .preference.enforcing_verbose = true,
+ .preference.learning_max_entry = 2048,
+ .preference.learning_verbose = false,
+ .preference.permissive_verbose = true
+};
+
+/* Profile version. Currently only 20090903 is defined. */
+static unsigned int tomoyo_profile_version;
-/* Has loading policy done? */
-bool tomoyo_policy_loaded;
+/* Profile table. Memory is allocated as needed. */
+static struct tomoyo_profile *tomoyo_profile_ptr[TOMOYO_MAX_PROFILES];
/* String table for functionality that takes 4 modes. */
static const char *tomoyo_mode_4[4] = {
"disabled", "learning", "permissive", "enforcing"
};
-/* String table for functionality that takes 2 modes. */
-static const char *tomoyo_mode_2[4] = {
- "disabled", "enabled", "enabled", "enabled"
-};
-/*
- * tomoyo_control_array is a static data which contains
- *
- * (1) functionality name used by /sys/kernel/security/tomoyo/profile .
- * (2) initial values for "struct tomoyo_profile".
- * (3) max values for "struct tomoyo_profile".
- */
-static struct {
- const char *keyword;
- unsigned int current_value;
- const unsigned int max_value;
-} tomoyo_control_array[TOMOYO_MAX_CONTROL_INDEX] = {
- [TOMOYO_MAC_FOR_FILE] = { "MAC_FOR_FILE", 0, 3 },
- [TOMOYO_MAX_ACCEPT_ENTRY] = { "MAX_ACCEPT_ENTRY", 2048, INT_MAX },
- [TOMOYO_VERBOSE] = { "TOMOYO_VERBOSE", 1, 1 },
+/* String table for /sys/kernel/security/tomoyo/profile */
+static const char *tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
+ + TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
+ [TOMOYO_MAC_FILE_EXECUTE] = "file::execute",
+ [TOMOYO_MAC_FILE_OPEN] = "file::open",
+ [TOMOYO_MAC_FILE_CREATE] = "file::create",
+ [TOMOYO_MAC_FILE_UNLINK] = "file::unlink",
+ [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",
+ [TOMOYO_MAC_FILE_RENAME] = "file::rename",
+ [TOMOYO_MAC_FILE_CHMOD] = "file::chmod",
+ [TOMOYO_MAC_FILE_CHOWN] = "file::chown",
+ [TOMOYO_MAC_FILE_CHGRP] = "file::chgrp",
+ [TOMOYO_MAC_FILE_IOCTL] = "file::ioctl",
+ [TOMOYO_MAC_FILE_CHROOT] = "file::chroot",
+ [TOMOYO_MAC_FILE_MOUNT] = "file::mount",
+ [TOMOYO_MAC_FILE_UMOUNT] = "file::umount",
+ [TOMOYO_MAC_FILE_PIVOT_ROOT] = "file::pivot_root",
+ [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file",
};
-/*
- * tomoyo_profile is a structure which is used for holding the mode of access
- * controls. TOMOYO has 4 modes: disabled, learning, permissive, enforcing.
- * An administrator can define up to 256 profiles.
- * The ->profile of "struct tomoyo_domain_info" is used for remembering
- * the profile's number (0 - 255) assigned to that domain.
- */
-static struct tomoyo_profile {
- unsigned int value[TOMOYO_MAX_CONTROL_INDEX];
- const struct tomoyo_path_info *comment;
-} *tomoyo_profile_ptr[TOMOYO_MAX_PROFILES];
-
/* Permit policy management by non-root user? */
static bool tomoyo_manage_by_non_root;
/* Utility functions. */
-/* Open operation for /sys/kernel/security/tomoyo/ interface. */
-static int tomoyo_open_control(const u8 type, struct file *file);
-/* Close /sys/kernel/security/tomoyo/ interface. */
-static int tomoyo_close_control(struct file *file);
-/* Read operation for /sys/kernel/security/tomoyo/ interface. */
-static int tomoyo_read_control(struct file *file, char __user *buffer,
- const int buffer_len);
-/* Write operation for /sys/kernel/security/tomoyo/ interface. */
-static 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. */
-static bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
-
/**
- * tomoyo_parse_name_union - Parse a tomoyo_name_union.
+ * tomoyo_yesno - Return "yes" or "no".
*
- * @filename: Name or name group.
- * @ptr: Pointer to "struct tomoyo_name_union".
- *
- * Returns true on success, false otherwise.
+ * @value: Bool value.
*/
-bool tomoyo_parse_name_union(const char *filename,
- struct tomoyo_name_union *ptr)
+static const char *tomoyo_yesno(const unsigned int value)
{
- if (!tomoyo_is_correct_path(filename, 0, 0, 0))
- return false;
- if (filename[0] == '@') {
- ptr->group = tomoyo_get_path_group(filename + 1);
- ptr->is_group = true;
- return ptr->group != NULL;
- }
- ptr->filename = tomoyo_get_name(filename);
- ptr->is_group = false;
- return ptr->filename != NULL;
+ return value ? "yes" : "no";
}
/**
return tomoyo_io_printf(head, " %s", ptr->filename->name);
}
-/**
- * tomoyo_parse_ulong - Parse an "unsigned long" value.
- *
- * @result: Pointer to "unsigned long".
- * @str: Pointer to string to parse.
- *
- * Returns value type on success, 0 otherwise.
- *
- * The @src is updated to point the first character after the value
- * on success.
- */
-u8 tomoyo_parse_ulong(unsigned long *result, char **str)
-{
- const char *cp = *str;
- char *ep;
- int base = 10;
- if (*cp == '0') {
- char c = *(cp + 1);
- if (c == 'x' || c == 'X') {
- base = 16;
- cp += 2;
- } else if (c >= '0' && c <= '7') {
- base = 8;
- cp++;
- }
- }
- *result = simple_strtoul(cp, &ep, base);
- if (cp == ep)
- return 0;
- *str = ep;
- switch (base) {
- case 16:
- return TOMOYO_VALUE_TYPE_HEXADECIMAL;
- case 8:
- return TOMOYO_VALUE_TYPE_OCTAL;
- default:
- return TOMOYO_VALUE_TYPE_DECIMAL;
- }
-}
-
-/**
- * tomoyo_print_ulong - Print an "unsigned long" value.
- *
- * @buffer: Pointer to buffer.
- * @buffer_len: Size of @buffer.
- * @value: An "unsigned long" value.
- * @type: Type of @value.
- *
- * Returns nothing.
- */
-void tomoyo_print_ulong(char *buffer, const int buffer_len,
- const unsigned long value, const u8 type)
-{
- if (type == TOMOYO_VALUE_TYPE_DECIMAL)
- snprintf(buffer, buffer_len, "%lu", value);
- else if (type == TOMOYO_VALUE_TYPE_OCTAL)
- snprintf(buffer, buffer_len, "0%lo", value);
- else if (type == TOMOYO_VALUE_TYPE_HEXADECIMAL)
- snprintf(buffer, buffer_len, "0x%lX", value);
- else
- snprintf(buffer, buffer_len, "type(%u)", type);
-}
-
/**
* tomoyo_print_number_union - Print a tomoyo_number_union.
*
}
}
-/**
- * tomoyo_parse_number_union - Parse a tomoyo_number_union.
- *
- * @data: Number or number range or number group.
- * @ptr: Pointer to "struct tomoyo_number_union".
- *
- * Returns true on success, false otherwise.
- */
-bool tomoyo_parse_number_union(char *data, struct tomoyo_number_union *num)
-{
- u8 type;
- unsigned long v;
- memset(num, 0, sizeof(*num));
- if (data[0] == '@') {
- if (!tomoyo_is_correct_path(data, 0, 0, 0))
- return false;
- num->group = tomoyo_get_number_group(data + 1);
- num->is_group = true;
- return num->group != NULL;
- }
- type = tomoyo_parse_ulong(&v, &data);
- if (!type)
- return false;
- num->values[0] = v;
- num->min_type = type;
- if (!*data) {
- num->values[1] = v;
- num->max_type = type;
- return true;
- }
- if (*data++ != '-')
- return false;
- type = tomoyo_parse_ulong(&v, &data);
- if (!type || *data)
- return false;
- num->values[1] = v;
- num->max_type = type;
- return true;
-}
-
-/**
- * tomoyo_is_byte_range - Check whether the string isa \ooo style octal value.
- *
- * @str: Pointer to the string.
- *
- * Returns true if @str is a \ooo style octal value, false otherwise.
- *
- * TOMOYO uses \ooo style representation for 0x01 - 0x20 and 0x7F - 0xFF.
- * This function verifies that \ooo is in valid range.
- */
-static inline bool tomoyo_is_byte_range(const char *str)
-{
- return *str >= '0' && *str++ <= '3' &&
- *str >= '0' && *str++ <= '7' &&
- *str >= '0' && *str <= '7';
-}
-
-/**
- * tomoyo_is_alphabet_char - Check whether the character is an alphabet.
- *
- * @c: The character to check.
- *
- * Returns true if @c is an alphabet character, false otherwise.
- */
-static inline bool tomoyo_is_alphabet_char(const char c)
-{
- return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
-}
-
-/**
- * tomoyo_make_byte - Make byte value from three octal characters.
- *
- * @c1: The first character.
- * @c2: The second character.
- * @c3: The third character.
- *
- * Returns byte value.
- */
-static inline u8 tomoyo_make_byte(const u8 c1, const u8 c2, const u8 c3)
-{
- return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0');
-}
-
-/**
- * tomoyo_str_starts - Check whether the given string starts with the given keyword.
- *
- * @src: Pointer to pointer to the string.
- * @find: Pointer to the keyword.
- *
- * Returns true if @src starts with @find, false otherwise.
- *
- * The @src is updated to point the first character after the @find
- * if @src starts with @find.
- */
-static bool tomoyo_str_starts(char **src, const char *find)
-{
- const int len = strlen(find);
- char *tmp = *src;
-
- if (strncmp(tmp, find, len))
- return false;
- tmp += len;
- *src = tmp;
- return true;
-}
-
-/**
- * tomoyo_normalize_line - Format string.
- *
- * @buffer: The line to normalize.
- *
- * Leading and trailing whitespaces are removed.
- * Multiple whitespaces are packed into single space.
- *
- * Returns nothing.
- */
-static void tomoyo_normalize_line(unsigned char *buffer)
-{
- unsigned char *sp = buffer;
- unsigned char *dp = buffer;
- bool first = true;
-
- while (tomoyo_is_invalid(*sp))
- sp++;
- while (*sp) {
- if (!first)
- *dp++ = ' ';
- first = false;
- while (tomoyo_is_valid(*sp))
- *dp++ = *sp++;
- while (tomoyo_is_invalid(*sp))
- sp++;
- }
- *dp = '\0';
-}
-
-/**
- * tomoyo_tokenize - Tokenize string.
- *
- * @buffer: The line to tokenize.
- * @w: Pointer to "char *".
- * @size: Sizeof @w .
- *
- * Returns true on success, false otherwise.
- */
-bool tomoyo_tokenize(char *buffer, char *w[], size_t size)
-{
- int count = size / sizeof(char *);
- int i;
- for (i = 0; i < count; i++)
- w[i] = "";
- for (i = 0; i < count; i++) {
- char *cp = strchr(buffer, ' ');
- if (cp)
- *cp = '\0';
- w[i] = buffer;
- if (!cp)
- break;
- buffer = cp + 1;
- }
- return i < count || !*buffer;
-}
-
-/**
- * tomoyo_is_correct_path - Validate a pathname.
- * @filename: The pathname to check.
- * @start_type: Should the pathname start with '/'?
- * 1 = must / -1 = must not / 0 = don't care
- * @pattern_type: Can the pathname contain a wildcard?
- * 1 = must / -1 = must not / 0 = don't care
- * @end_type: Should the pathname end with '/'?
- * 1 = must / -1 = must not / 0 = don't care
- *
- * Check whether the given filename follows the naming rules.
- * Returns true if @filename follows the naming rules, false otherwise.
- */
-bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
- const s8 pattern_type, const s8 end_type)
-{
- const char *const start = filename;
- bool in_repetition = false;
- bool contains_pattern = false;
- unsigned char c;
- unsigned char d;
- unsigned char e;
-
- if (!filename)
- goto out;
- c = *filename;
- if (start_type == 1) { /* Must start with '/' */
- if (c != '/')
- goto out;
- } else if (start_type == -1) { /* Must not start with '/' */
- if (c == '/')
- goto out;
- }
- if (c)
- c = *(filename + strlen(filename) - 1);
- if (end_type == 1) { /* Must end with '/' */
- if (c != '/')
- goto out;
- } else if (end_type == -1) { /* Must not end with '/' */
- if (c == '/')
- goto out;
- }
- while (1) {
- c = *filename++;
- if (!c)
- break;
- if (c == '\\') {
- c = *filename++;
- switch (c) {
- case '\\': /* "\\" */
- continue;
- case '$': /* "\$" */
- case '+': /* "\+" */
- case '?': /* "\?" */
- case '*': /* "\*" */
- case '@': /* "\@" */
- case 'x': /* "\x" */
- case 'X': /* "\X" */
- case 'a': /* "\a" */
- case 'A': /* "\A" */
- case '-': /* "\-" */
- if (pattern_type == -1)
- break; /* Must not contain pattern */
- contains_pattern = true;
- continue;
- case '{': /* "/\{" */
- if (filename - 3 < start ||
- *(filename - 3) != '/')
- break;
- if (pattern_type == -1)
- break; /* Must not contain pattern */
- contains_pattern = true;
- in_repetition = true;
- continue;
- case '}': /* "\}/" */
- if (*filename != '/')
- break;
- if (!in_repetition)
- break;
- in_repetition = false;
- continue;
- case '0': /* "\ooo" */
- case '1':
- case '2':
- case '3':
- d = *filename++;
- if (d < '0' || d > '7')
- break;
- e = *filename++;
- if (e < '0' || e > '7')
- break;
- c = tomoyo_make_byte(c, d, e);
- if (tomoyo_is_invalid(c))
- continue; /* pattern is not \000 */
- }
- goto out;
- } else if (in_repetition && c == '/') {
- goto out;
- } else if (tomoyo_is_invalid(c)) {
- goto out;
- }
- }
- if (pattern_type == 1) { /* Must contain pattern */
- if (!contains_pattern)
- goto out;
- }
- if (in_repetition)
- goto out;
- return true;
- out:
- return false;
-}
-
-/**
- * tomoyo_is_correct_domain - Check whether the given domainname follows the naming rules.
- * @domainname: The domainname to check.
- *
- * Returns true if @domainname follows the naming rules, false otherwise.
- */
-bool tomoyo_is_correct_domain(const unsigned char *domainname)
-{
- unsigned char c;
- unsigned char d;
- unsigned char e;
-
- if (!domainname || strncmp(domainname, TOMOYO_ROOT_NAME,
- TOMOYO_ROOT_NAME_LEN))
- goto out;
- domainname += TOMOYO_ROOT_NAME_LEN;
- if (!*domainname)
- return true;
- do {
- if (*domainname++ != ' ')
- goto out;
- if (*domainname++ != '/')
- goto out;
- while ((c = *domainname) != '\0' && c != ' ') {
- domainname++;
- if (c == '\\') {
- c = *domainname++;
- switch ((c)) {
- case '\\': /* "\\" */
- continue;
- case '0': /* "\ooo" */
- case '1':
- case '2':
- case '3':
- d = *domainname++;
- if (d < '0' || d > '7')
- break;
- e = *domainname++;
- if (e < '0' || e > '7')
- break;
- c = tomoyo_make_byte(c, d, e);
- if (tomoyo_is_invalid(c))
- /* pattern is not \000 */
- continue;
- }
- goto out;
- } else if (tomoyo_is_invalid(c)) {
- goto out;
- }
- }
- } while (*domainname);
- return true;
- out:
- return false;
-}
-
-/**
- * tomoyo_is_domain_def - Check whether the given token can be a domainname.
- *
- * @buffer: The token to check.
- *
- * Returns true if @buffer possibly be a domainname, false otherwise.
- */
-bool tomoyo_is_domain_def(const unsigned char *buffer)
-{
- return !strncmp(buffer, TOMOYO_ROOT_NAME, TOMOYO_ROOT_NAME_LEN);
-}
-
-/**
- * tomoyo_find_domain - Find a domain by the given name.
- *
- * @domainname: The domainname to find.
- *
- * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname)
-{
- struct tomoyo_domain_info *domain;
- struct tomoyo_path_info name;
-
- name.name = domainname;
- tomoyo_fill_path_info(&name);
- list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
- if (!domain->is_deleted &&
- !tomoyo_pathcmp(&name, domain->domainname))
- return domain;
- }
- return NULL;
-}
-
-/**
- * tomoyo_const_part_length - Evaluate the initial length without a pattern in a token.
- *
- * @filename: The string to evaluate.
- *
- * Returns the initial length without a pattern in @filename.
- */
-static int tomoyo_const_part_length(const char *filename)
-{
- char c;
- int len = 0;
-
- if (!filename)
- return 0;
- while ((c = *filename++) != '\0') {
- if (c != '\\') {
- len++;
- continue;
- }
- c = *filename++;
- switch (c) {
- case '\\': /* "\\" */
- len += 2;
- continue;
- case '0': /* "\ooo" */
- case '1':
- case '2':
- case '3':
- c = *filename++;
- if (c < '0' || c > '7')
- break;
- c = *filename++;
- if (c < '0' || c > '7')
- break;
- len += 4;
- continue;
- }
- break;
- }
- return len;
-}
-
-/**
- * tomoyo_fill_path_info - Fill in "struct tomoyo_path_info" members.
- *
- * @ptr: Pointer to "struct tomoyo_path_info" to fill in.
- *
- * The caller sets "struct tomoyo_path_info"->name.
- */
-void tomoyo_fill_path_info(struct tomoyo_path_info *ptr)
-{
- const char *name = ptr->name;
- const int len = strlen(name);
-
- ptr->const_len = tomoyo_const_part_length(name);
- ptr->is_dir = len && (name[len - 1] == '/');
- ptr->is_patterned = (ptr->const_len < len);
- ptr->hash = full_name_hash(name, len);
-}
-
-/**
- * tomoyo_file_matches_pattern2 - Pattern matching without '/' character
- * and "\-" pattern.
- *
- * @filename: The start of string to check.
- * @filename_end: The end of string to check.
- * @pattern: The start of pattern to compare.
- * @pattern_end: The end of pattern to compare.
- *
- * Returns true if @filename matches @pattern, false otherwise.
- */
-static bool tomoyo_file_matches_pattern2(const char *filename,
- const char *filename_end,
- const char *pattern,
- const char *pattern_end)
-{
- while (filename < filename_end && pattern < pattern_end) {
- char c;
- if (*pattern != '\\') {
- if (*filename++ != *pattern++)
- return false;
- continue;
- }
- c = *filename;
- pattern++;
- switch (*pattern) {
- int i;
- int j;
- case '?':
- if (c == '/') {
- return false;
- } else if (c == '\\') {
- if (filename[1] == '\\')
- filename++;
- else if (tomoyo_is_byte_range(filename + 1))
- filename += 3;
- else
- return false;
- }
- break;
- case '\\':
- if (c != '\\')
- return false;
- if (*++filename != '\\')
- return false;
- break;
- case '+':
- if (!isdigit(c))
- return false;
- break;
- case 'x':
- if (!isxdigit(c))
- return false;
- break;
- case 'a':
- if (!tomoyo_is_alphabet_char(c))
- return false;
- break;
- case '0':
- case '1':
- case '2':
- case '3':
- if (c == '\\' && tomoyo_is_byte_range(filename + 1)
- && strncmp(filename + 1, pattern, 3) == 0) {
- filename += 3;
- pattern += 2;
- break;
- }
- return false; /* Not matched. */
- case '*':
- case '@':
- for (i = 0; i <= filename_end - filename; i++) {
- if (tomoyo_file_matches_pattern2(
- filename + i, filename_end,
- pattern + 1, pattern_end))
- return true;
- c = filename[i];
- if (c == '.' && *pattern == '@')
- break;
- if (c != '\\')
- continue;
- if (filename[i + 1] == '\\')
- i++;
- else if (tomoyo_is_byte_range(filename + i + 1))
- i += 3;
- else
- break; /* Bad pattern. */
- }
- return false; /* Not matched. */
- default:
- j = 0;
- c = *pattern;
- if (c == '$') {
- while (isdigit(filename[j]))
- j++;
- } else if (c == 'X') {
- while (isxdigit(filename[j]))
- j++;
- } else if (c == 'A') {
- while (tomoyo_is_alphabet_char(filename[j]))
- j++;
- }
- for (i = 1; i <= j; i++) {
- if (tomoyo_file_matches_pattern2(
- filename + i, filename_end,
- pattern + 1, pattern_end))
- return true;
- }
- return false; /* Not matched or bad pattern. */
- }
- filename++;
- pattern++;
- }
- while (*pattern == '\\' &&
- (*(pattern + 1) == '*' || *(pattern + 1) == '@'))
- pattern += 2;
- return filename == filename_end && pattern == pattern_end;
-}
-
-/**
- * tomoyo_file_matches_pattern - Pattern matching without without '/' character.
- *
- * @filename: The start of string to check.
- * @filename_end: The end of string to check.
- * @pattern: The start of pattern to compare.
- * @pattern_end: The end of pattern to compare.
- *
- * Returns true if @filename matches @pattern, false otherwise.
- */
-static bool tomoyo_file_matches_pattern(const char *filename,
- const char *filename_end,
- const char *pattern,
- const char *pattern_end)
-{
- const char *pattern_start = pattern;
- bool first = true;
- bool result;
-
- while (pattern < pattern_end - 1) {
- /* Split at "\-" pattern. */
- if (*pattern++ != '\\' || *pattern++ != '-')
- continue;
- result = tomoyo_file_matches_pattern2(filename,
- filename_end,
- pattern_start,
- pattern - 2);
- if (first)
- result = !result;
- if (result)
- return false;
- first = false;
- pattern_start = pattern;
- }
- result = tomoyo_file_matches_pattern2(filename, filename_end,
- pattern_start, pattern_end);
- return first ? result : !result;
-}
-
-/**
- * tomoyo_path_matches_pattern2 - Do pathname pattern matching.
- *
- * @f: The start of string to check.
- * @p: The start of pattern to compare.
- *
- * Returns true if @f matches @p, false otherwise.
- */
-static bool tomoyo_path_matches_pattern2(const char *f, const char *p)
-{
- const char *f_delimiter;
- const char *p_delimiter;
-
- while (*f && *p) {
- f_delimiter = strchr(f, '/');
- if (!f_delimiter)
- f_delimiter = f + strlen(f);
- p_delimiter = strchr(p, '/');
- if (!p_delimiter)
- p_delimiter = p + strlen(p);
- if (*p == '\\' && *(p + 1) == '{')
- goto recursive;
- if (!tomoyo_file_matches_pattern(f, f_delimiter, p,
- p_delimiter))
- return false;
- f = f_delimiter;
- if (*f)
- f++;
- p = p_delimiter;
- if (*p)
- p++;
- }
- /* Ignore trailing "\*" and "\@" in @pattern. */
- while (*p == '\\' &&
- (*(p + 1) == '*' || *(p + 1) == '@'))
- p += 2;
- return !*f && !*p;
- recursive:
- /*
- * The "\{" pattern is permitted only after '/' character.
- * This guarantees that below "*(p - 1)" is safe.
- * Also, the "\}" pattern is permitted only before '/' character
- * so that "\{" + "\}" pair will not break the "\-" operator.
- */
- if (*(p - 1) != '/' || p_delimiter <= p + 3 || *p_delimiter != '/' ||
- *(p_delimiter - 1) != '}' || *(p_delimiter - 2) != '\\')
- return false; /* Bad pattern. */
- do {
- /* Compare current component with pattern. */
- if (!tomoyo_file_matches_pattern(f, f_delimiter, p + 2,
- p_delimiter - 2))
- break;
- /* Proceed to next component. */
- f = f_delimiter;
- if (!*f)
- break;
- f++;
- /* Continue comparison. */
- if (tomoyo_path_matches_pattern2(f, p_delimiter + 1))
- return true;
- f_delimiter = strchr(f, '/');
- } while (f_delimiter);
- return false; /* Not matched. */
-}
-
-/**
- * tomoyo_path_matches_pattern - Check whether the given filename matches the given pattern.
- *
- * @filename: The filename to check.
- * @pattern: The pattern to compare.
- *
- * Returns true if matches, false otherwise.
- *
- * The following patterns are available.
- * \\ \ itself.
- * \ooo Octal representation of a byte.
- * \* Zero or more repetitions of characters other than '/'.
- * \@ Zero or more repetitions of characters other than '/' or '.'.
- * \? 1 byte character other than '/'.
- * \$ One or more repetitions of decimal digits.
- * \+ 1 decimal digit.
- * \X One or more repetitions of hexadecimal digits.
- * \x 1 hexadecimal digit.
- * \A One or more repetitions of alphabet characters.
- * \a 1 alphabet character.
- *
- * \- Subtraction operator.
- *
- * /\{dir\}/ '/' + 'One or more repetitions of dir/' (e.g. /dir/ /dir/dir/
- * /dir/dir/dir/ ).
- */
-bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
- const struct tomoyo_path_info *pattern)
-{
- const char *f = filename->name;
- const char *p = pattern->name;
- const int len = pattern->const_len;
-
- /* If @pattern doesn't contain pattern, I can use strcmp(). */
- if (!pattern->is_patterned)
- return !tomoyo_pathcmp(filename, pattern);
- /* Don't compare directory and non-directory. */
- if (filename->is_dir != pattern->is_dir)
- return false;
- /* Compare the initial length without patterns. */
- if (strncmp(f, p, len))
- return false;
- f += len;
- p += len;
- return tomoyo_path_matches_pattern2(f, p);
-}
-
/**
* tomoyo_io_printf - Transactional printf() to "struct tomoyo_io_buffer" structure.
*
return true;
}
-/**
- * tomoyo_get_exe - Get tomoyo_realpath() of current process.
- *
- * Returns the tomoyo_realpath() of current process on success, NULL otherwise.
- *
- * This function uses kzalloc(), so the caller must call kfree()
- * if this function didn't return NULL.
- */
-static const char *tomoyo_get_exe(void)
-{
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma;
- const char *cp = NULL;
-
- if (!mm)
- return NULL;
- down_read(&mm->mmap_sem);
- for (vma = mm->mmap; vma; vma = vma->vm_next) {
- if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) {
- cp = tomoyo_realpath_from_path(&vma->vm_file->f_path);
- break;
- }
- }
- up_read(&mm->mmap_sem);
- return cp;
-}
-
-/**
- * tomoyo_check_flags - Check mode for specified functionality.
- *
- * @domain: Pointer to "struct tomoyo_domain_info".
- * @index: The functionality to check mode.
- *
- * TOMOYO checks only process context.
- * This code disables TOMOYO's enforcement in case the function is called from
- * interrupt context.
- */
-unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
- const u8 index)
-{
- const u8 profile = domain->profile;
-
- if (WARN_ON(in_interrupt()))
- return 0;
- return tomoyo_policy_loaded && index < TOMOYO_MAX_CONTROL_INDEX
-#if TOMOYO_MAX_PROFILES != 256
- && profile < TOMOYO_MAX_PROFILES
-#endif
- && tomoyo_profile_ptr[profile] ?
- tomoyo_profile_ptr[profile]->value[index] : 0;
-}
-
-/**
- * tomoyo_verbose_mode - Check whether TOMOYO is verbose mode.
- *
- * @domain: Pointer to "struct tomoyo_domain_info".
- *
- * Returns true if domain policy violation warning should be printed to
- * console.
- */
-bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain)
-{
- return tomoyo_check_flags(domain, TOMOYO_VERBOSE) != 0;
-}
-
-/**
- * tomoyo_domain_quota_is_ok - Check for domain's quota.
- *
- * @r: Pointer to "struct tomoyo_request_info".
- *
- * Returns true if the domain is not exceeded quota, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-static bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r)
-{
- unsigned int count = 0;
- struct tomoyo_domain_info *domain = r->domain;
- struct tomoyo_acl_info *ptr;
-
- if (r->mode != TOMOYO_CONFIG_LEARNING)
- return false;
- if (!domain)
- return true;
- list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
- 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_PATH_NUMBER3_ACL:
- perm = container_of(ptr, struct tomoyo_path_number3_acl,
- head)->perm;
- for (i = 0; i < TOMOYO_MAX_PATH_NUMBER3_OPERATION; i++)
- if (perm & (1 << i))
- count++;
- break;
- case TOMOYO_TYPE_MOUNT_ACL:
- if (!container_of(ptr, struct tomoyo_mount_acl, head)->
- is_deleted)
- count++;
- }
- }
- if (count < tomoyo_check_flags(domain, TOMOYO_MAX_ACCEPT_ENTRY))
- return true;
- if (!domain->quota_warned) {
- domain->quota_warned = true;
- printk(KERN_WARNING "TOMOYO-WARNING: "
- "Domain '%s' has so many ACLs to hold. "
- "Stopped learning mode.\n", domain->domainname->name);
- }
- return false;
-}
-
/**
* tomoyo_find_or_assign_new_profile - Create a new profile.
*
*
* Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
*/
-static struct tomoyo_profile *tomoyo_find_or_assign_new_profile(const unsigned
- int profile)
+static struct tomoyo_profile *tomoyo_find_or_assign_new_profile
+(const unsigned int profile)
{
- struct tomoyo_profile *ptr = NULL;
- int i;
-
+ struct tomoyo_profile *ptr;
+ struct tomoyo_profile *entry;
if (profile >= TOMOYO_MAX_PROFILES)
return NULL;
- if (mutex_lock_interruptible(&tomoyo_policy_lock))
- return NULL;
ptr = tomoyo_profile_ptr[profile];
if (ptr)
- goto ok;
- ptr = kmalloc(sizeof(*ptr), GFP_NOFS);
- if (!tomoyo_memory_ok(ptr)) {
- kfree(ptr);
- ptr = NULL;
- goto ok;
+ return ptr;
+ entry = kzalloc(sizeof(*entry), GFP_NOFS);
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
+ ptr = tomoyo_profile_ptr[profile];
+ if (!ptr && tomoyo_memory_ok(entry)) {
+ ptr = entry;
+ ptr->learning = &tomoyo_default_profile.preference;
+ ptr->permissive = &tomoyo_default_profile.preference;
+ ptr->enforcing = &tomoyo_default_profile.preference;
+ ptr->default_config = TOMOYO_CONFIG_DISABLED;
+ memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT,
+ sizeof(ptr->config));
+ mb(); /* Avoid out-of-order execution. */
+ tomoyo_profile_ptr[profile] = ptr;
+ entry = NULL;
}
- for (i = 0; i < TOMOYO_MAX_CONTROL_INDEX; i++)
- ptr->value[i] = tomoyo_control_array[i].current_value;
- mb(); /* Avoid out-of-order execution. */
- tomoyo_profile_ptr[profile] = ptr;
- ok:
mutex_unlock(&tomoyo_policy_lock);
+ out:
+ kfree(entry);
+ return ptr;
+}
+
+/**
+ * tomoyo_profile - Find a profile.
+ *
+ * @profile: Profile number to find.
+ *
+ * Returns pointer to "struct tomoyo_profile".
+ */
+struct tomoyo_profile *tomoyo_profile(const u8 profile)
+{
+ struct tomoyo_profile *ptr = tomoyo_profile_ptr[profile];
+ if (!tomoyo_policy_loaded)
+ return &tomoyo_default_profile;
+ BUG_ON(!ptr);
return ptr;
}
/**
- * tomoyo_write_profile - Write to profile table.
+ * tomoyo_write_profile - Write profile table.
*
* @head: Pointer to "struct tomoyo_io_buffer".
*
{
char *data = head->write_buf;
unsigned int i;
- unsigned int value;
+ int value;
+ int mode;
+ u8 config;
+ bool use_default = false;
char *cp;
struct tomoyo_profile *profile;
- unsigned long num;
-
- cp = strchr(data, '-');
- if (cp)
- *cp = '\0';
- if (strict_strtoul(data, 10, &num))
- return -EINVAL;
- if (cp)
+ if (sscanf(data, "PROFILE_VERSION=%u", &tomoyo_profile_version) == 1)
+ return 0;
+ i = simple_strtoul(data, &cp, 10);
+ if (data == cp) {
+ profile = &tomoyo_default_profile;
+ } else {
+ if (*cp != '-')
+ return -EINVAL;
data = cp + 1;
- profile = tomoyo_find_or_assign_new_profile(num);
- if (!profile)
- return -EINVAL;
+ profile = tomoyo_find_or_assign_new_profile(i);
+ if (!profile)
+ return -EINVAL;
+ }
cp = strchr(data, '=');
if (!cp)
return -EINVAL;
- *cp = '\0';
+ *cp++ = '\0';
+ if (profile != &tomoyo_default_profile)
+ use_default = strstr(cp, "use_default") != NULL;
+ if (strstr(cp, "verbose=yes"))
+ value = 1;
+ else if (strstr(cp, "verbose=no"))
+ value = 0;
+ else
+ value = -1;
+ if (!strcmp(data, "PREFERENCE::enforcing")) {
+ if (use_default) {
+ profile->enforcing = &tomoyo_default_profile.preference;
+ return 0;
+ }
+ profile->enforcing = &profile->preference;
+ if (value >= 0)
+ profile->preference.enforcing_verbose = value;
+ return 0;
+ }
+ if (!strcmp(data, "PREFERENCE::permissive")) {
+ if (use_default) {
+ profile->permissive = &tomoyo_default_profile.preference;
+ return 0;
+ }
+ profile->permissive = &profile->preference;
+ if (value >= 0)
+ profile->preference.permissive_verbose = value;
+ return 0;
+ }
+ if (!strcmp(data, "PREFERENCE::learning")) {
+ char *cp2;
+ if (use_default) {
+ profile->learning = &tomoyo_default_profile.preference;
+ return 0;
+ }
+ profile->learning = &profile->preference;
+ if (value >= 0)
+ profile->preference.learning_verbose = value;
+ cp2 = strstr(cp, "max_entry=");
+ if (cp2)
+ sscanf(cp2 + 10, "%u",
+ &profile->preference.learning_max_entry);
+ return 0;
+ }
+ if (profile == &tomoyo_default_profile)
+ return -EINVAL;
if (!strcmp(data, "COMMENT")) {
const struct tomoyo_path_info *old_comment = profile->comment;
- profile->comment = tomoyo_get_name(cp + 1);
+ profile->comment = tomoyo_get_name(cp);
tomoyo_put_name(old_comment);
return 0;
}
- for (i = 0; i < TOMOYO_MAX_CONTROL_INDEX; i++) {
- if (strcmp(data, tomoyo_control_array[i].keyword))
- continue;
- if (sscanf(cp + 1, "%u", &value) != 1) {
- int j;
- const char **modes;
- switch (i) {
- case TOMOYO_VERBOSE:
- modes = tomoyo_mode_2;
- break;
- default:
- modes = tomoyo_mode_4;
- break;
- }
- for (j = 0; j < 4; j++) {
- if (strcmp(cp + 1, modes[j]))
- continue;
- value = j;
- break;
- }
- if (j == 4)
- return -EINVAL;
- } else if (value > tomoyo_control_array[i].max_value) {
- value = tomoyo_control_array[i].max_value;
+ if (!strcmp(data, "CONFIG")) {
+ i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX;
+ config = profile->default_config;
+ } else if (tomoyo_str_starts(&data, "CONFIG::")) {
+ config = 0;
+ for (i = 0; i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) {
+ if (strcmp(data, tomoyo_mac_keywords[i]))
+ continue;
+ config = profile->config[i];
+ break;
}
- profile->value[i] = value;
- return 0;
+ if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
+ return -EINVAL;
+ } else {
+ return -EINVAL;
}
- return -EINVAL;
+ if (use_default) {
+ config = TOMOYO_CONFIG_USE_DEFAULT;
+ } else {
+ for (mode = 3; mode >= 0; mode--)
+ if (strstr(cp, tomoyo_mode_4[mode]))
+ /*
+ * Update lower 3 bits in order to distinguish
+ * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
+ */
+ config = (config & ~7) | mode;
+ }
+ if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
+ profile->config[i] = config;
+ else if (config != TOMOYO_CONFIG_USE_DEFAULT)
+ profile->default_config = config;
+ return 0;
}
/**
- * tomoyo_read_profile - Read from profile table.
+ * tomoyo_read_profile - Read profile table.
*
* @head: Pointer to "struct tomoyo_io_buffer".
*
*/
static int tomoyo_read_profile(struct tomoyo_io_buffer *head)
{
- static const int total = TOMOYO_MAX_CONTROL_INDEX + 1;
- int step;
-
+ int index;
if (head->read_eof)
return 0;
- for (step = head->read_step; step < TOMOYO_MAX_PROFILES * total;
- step++) {
- const u8 index = step / total;
- u8 type = step % total;
+ if (head->read_bit)
+ goto body;
+ tomoyo_io_printf(head, "PROFILE_VERSION=%s\n", "20090903");
+ tomoyo_io_printf(head, "PREFERENCE::learning={ verbose=%s "
+ "max_entry=%u }\n",
+ tomoyo_yesno(tomoyo_default_profile.preference.
+ learning_verbose),
+ tomoyo_default_profile.preference.learning_max_entry);
+ tomoyo_io_printf(head, "PREFERENCE::permissive={ verbose=%s }\n",
+ tomoyo_yesno(tomoyo_default_profile.preference.
+ permissive_verbose));
+ tomoyo_io_printf(head, "PREFERENCE::enforcing={ verbose=%s }\n",
+ tomoyo_yesno(tomoyo_default_profile.preference.
+ enforcing_verbose));
+ head->read_bit = 1;
+ body:
+ for (index = head->read_step; index < TOMOYO_MAX_PROFILES; index++) {
+ bool done;
+ u8 config;
+ int i;
+ int pos;
const struct tomoyo_profile *profile
= tomoyo_profile_ptr[index];
- head->read_step = step;
+ const struct tomoyo_path_info *comment;
+ head->read_step = index;
if (!profile)
continue;
- if (!type) { /* Print profile' comment tag. */
- if (!tomoyo_io_printf(head, "%u-COMMENT=%s\n",
- index, profile->comment ?
- profile->comment->name : ""))
- break;
- continue;
- }
- type--;
- if (type < TOMOYO_MAX_CONTROL_INDEX) {
- const unsigned int value = profile->value[type];
- const char **modes = NULL;
- const char *keyword
- = tomoyo_control_array[type].keyword;
- switch (tomoyo_control_array[type].max_value) {
- case 3:
- modes = tomoyo_mode_4;
- break;
- case 1:
- modes = tomoyo_mode_2;
- break;
- }
- if (modes) {
- if (!tomoyo_io_printf(head, "%u-%s=%s\n", index,
- keyword, modes[value]))
- break;
- } else {
- if (!tomoyo_io_printf(head, "%u-%s=%u\n", index,
- keyword, value))
- break;
- }
+ pos = head->read_avail;
+ comment = profile->comment;
+ done = tomoyo_io_printf(head, "%u-COMMENT=%s\n", index,
+ comment ? comment->name : "");
+ if (!done)
+ goto out;
+ config = profile->default_config;
+ if (!tomoyo_io_printf(head, "%u-CONFIG={ mode=%s }\n", index,
+ tomoyo_mode_4[config & 3]))
+ goto out;
+ for (i = 0; i < TOMOYO_MAX_MAC_INDEX +
+ TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) {
+ config = profile->config[i];
+ if (config == TOMOYO_CONFIG_USE_DEFAULT)
+ continue;
+ if (!tomoyo_io_printf(head,
+ "%u-CONFIG::%s={ mode=%s }\n",
+ index, tomoyo_mac_keywords[i],
+ tomoyo_mode_4[config & 3]))
+ goto out;
}
+ if (profile->learning != &tomoyo_default_profile.preference &&
+ !tomoyo_io_printf(head, "%u-PREFERENCE::learning={ "
+ "verbose=%s max_entry=%u }\n", index,
+ tomoyo_yesno(profile->preference.
+ learning_verbose),
+ profile->preference.learning_max_entry))
+ goto out;
+ if (profile->permissive != &tomoyo_default_profile.preference
+ && !tomoyo_io_printf(head, "%u-PREFERENCE::permissive={ "
+ "verbose=%s }\n", index,
+ tomoyo_yesno(profile->preference.
+ permissive_verbose)))
+ goto out;
+ if (profile->enforcing != &tomoyo_default_profile.preference &&
+ !tomoyo_io_printf(head, "%u-PREFERENCE::enforcing={ "
+ "verbose=%s }\n", index,
+ tomoyo_yesno(profile->preference.
+ enforcing_verbose)))
+ goto out;
+ continue;
+ out:
+ head->read_avail = pos;
+ break;
}
- if (step == TOMOYO_MAX_PROFILES * total)
+ if (index == TOMOYO_MAX_PROFILES)
head->read_eof = true;
return 0;
}
*
* or
*
- * # echo '/usr/lib/ccs/editpolicy' > /sys/kernel/security/tomoyo/manager
+ * # echo '/usr/sbin/tomoyo-editpolicy' > /sys/kernel/security/tomoyo/manager
* (if you want to specify by a program's location)
*
* and is deleted by
*
* or
*
- * # echo 'delete /usr/lib/ccs/editpolicy' > \
+ * # echo 'delete /usr/sbin/tomoyo-editpolicy' > \
* /sys/kernel/security/tomoyo/manager
*
* and all entries are retrieved by
*/
LIST_HEAD(tomoyo_policy_manager_list);
+static bool tomoyo_same_manager_entry(const struct tomoyo_acl_head *a,
+ const struct tomoyo_acl_head *b)
+{
+ return container_of(a, struct tomoyo_policy_manager_entry, head)
+ ->manager ==
+ container_of(b, struct tomoyo_policy_manager_entry, head)
+ ->manager;
+}
+
/**
* tomoyo_update_manager_entry - Add a manager entry.
*
static int tomoyo_update_manager_entry(const char *manager,
const bool is_delete)
{
- struct tomoyo_policy_manager_entry *ptr;
struct tomoyo_policy_manager_entry e = { };
- int error = is_delete ? -ENOENT : -ENOMEM;
+ int error;
- if (tomoyo_is_domain_def(manager)) {
- if (!tomoyo_is_correct_domain(manager))
+ if (tomoyo_domain_def(manager)) {
+ if (!tomoyo_correct_domain(manager))
return -EINVAL;
e.is_domain = true;
} else {
- if (!tomoyo_is_correct_path(manager, 1, -1, -1))
+ if (!tomoyo_correct_path(manager))
return -EINVAL;
}
e.manager = tomoyo_get_name(manager);
if (!e.manager)
return -ENOMEM;
- if (mutex_lock_interruptible(&tomoyo_policy_lock))
- goto out;
- list_for_each_entry_rcu(ptr, &tomoyo_policy_manager_list, list) {
- if (ptr->manager != e.manager)
- continue;
- ptr->is_deleted = is_delete;
- error = 0;
- break;
- }
- if (!is_delete && error) {
- struct tomoyo_policy_manager_entry *entry =
- tomoyo_commit_ok(&e, sizeof(e));
- if (entry) {
- list_add_tail_rcu(&entry->list,
- &tomoyo_policy_manager_list);
- error = 0;
- }
- }
- mutex_unlock(&tomoyo_policy_lock);
- out:
+ error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
+ &tomoyo_policy_manager_list,
+ tomoyo_same_manager_entry);
tomoyo_put_name(e.manager);
return error;
}
&tomoyo_policy_manager_list) {
struct tomoyo_policy_manager_entry *ptr;
ptr = list_entry(pos, struct tomoyo_policy_manager_entry,
- list);
- if (ptr->is_deleted)
+ head.list);
+ if (ptr->head.is_deleted)
continue;
done = tomoyo_io_printf(head, "%s\n", ptr->manager->name);
if (!done)
}
/**
- * tomoyo_is_policy_manager - Check whether the current process is a policy manager.
+ * tomoyo_policy_manager - Check whether the current process is a policy manager.
*
* Returns true if the current process is permitted to modify policy
* via /sys/kernel/security/tomoyo/ interface.
*
* Caller holds tomoyo_read_lock().
*/
-static bool tomoyo_is_policy_manager(void)
+static bool tomoyo_policy_manager(void)
{
struct tomoyo_policy_manager_entry *ptr;
const char *exe;
return true;
if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid))
return false;
- list_for_each_entry_rcu(ptr, &tomoyo_policy_manager_list, list) {
- if (!ptr->is_deleted && ptr->is_domain
+ list_for_each_entry_rcu(ptr, &tomoyo_policy_manager_list, head.list) {
+ if (!ptr->head.is_deleted && ptr->is_domain
&& !tomoyo_pathcmp(domainname, ptr->manager)) {
found = true;
break;
exe = tomoyo_get_exe();
if (!exe)
return false;
- list_for_each_entry_rcu(ptr, &tomoyo_policy_manager_list, list) {
- if (!ptr->is_deleted && !ptr->is_domain
+ list_for_each_entry_rcu(ptr, &tomoyo_policy_manager_list, head.list) {
+ if (!ptr->head.is_deleted && !ptr->is_domain
&& !strcmp(exe, ptr->manager->name)) {
found = true;
break;
}
/**
- * tomoyo_is_select_one - Parse select command.
+ * tomoyo_select_one - Parse select command.
*
* @head: Pointer to "struct tomoyo_io_buffer".
* @data: String to parse.
*
* Caller holds tomoyo_read_lock().
*/
-static bool tomoyo_is_select_one(struct tomoyo_io_buffer *head,
+static bool tomoyo_select_one(struct tomoyo_io_buffer *head,
const char *data)
{
unsigned int pid;
struct tomoyo_domain_info *domain = NULL;
+ bool global_pid = false;
- if (sscanf(data, "pid=%u", &pid) == 1) {
+ if (sscanf(data, "pid=%u", &pid) == 1 ||
+ (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
struct task_struct *p;
rcu_read_lock();
read_lock(&tasklist_lock);
- p = find_task_by_vpid(pid);
+ if (global_pid)
+ p = find_task_by_pid_ns(pid, &init_pid_ns);
+ else
+ p = find_task_by_vpid(pid);
if (p)
domain = tomoyo_real_domain(p);
read_unlock(&tasklist_lock);
rcu_read_unlock();
} else if (!strncmp(data, "domain=", 7)) {
- if (tomoyo_is_domain_def(data + 7))
+ if (tomoyo_domain_def(data + 7))
domain = tomoyo_find_domain(data + 7);
} else
return false;
is_delete = true;
else if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_SELECT))
is_select = true;
- if (is_select && tomoyo_is_select_one(head, data))
+ if (is_select && tomoyo_select_one(head, data))
return 0;
/* Don't allow updating policies by non manager programs. */
- if (!tomoyo_is_policy_manager())
+ if (!tomoyo_policy_manager())
return -EPERM;
- if (tomoyo_is_domain_def(data)) {
+ if (tomoyo_domain_def(data)) {
domain = NULL;
if (is_delete)
tomoyo_delete_domain(data);
domain->ignore_global_allow_read = !is_delete;
return 0;
}
+ if (!strcmp(data, TOMOYO_KEYWORD_QUOTA_EXCEEDED)) {
+ domain->quota_warned = !is_delete;
+ return 0;
+ }
+ if (!strcmp(data, TOMOYO_KEYWORD_TRANSITION_FAILED)) {
+ domain->transition_failed = !is_delete;
+ return 0;
+ }
return tomoyo_write_domain_policy2(data, domain, is_delete);
}
}
/**
- * tomoyo_print_path_number3_acl - Print a path_number3 ACL entry.
+ * tomoyo_print_mkdev_acl - Print a mkdev ACL entry.
*
* @head: Pointer to "struct tomoyo_io_buffer".
- * @ptr: Pointer to "struct tomoyo_path_number3_acl".
+ * @ptr: Pointer to "struct tomoyo_mkdev_acl".
*
* Returns true on success, false otherwise.
*/
-static bool tomoyo_print_path_number3_acl(struct tomoyo_io_buffer *head,
- struct tomoyo_path_number3_acl *ptr)
+static bool tomoyo_print_mkdev_acl(struct tomoyo_io_buffer *head,
+ struct tomoyo_mkdev_acl *ptr)
{
int pos;
u8 bit;
const u16 perm = ptr->perm;
- for (bit = head->read_bit; bit < TOMOYO_MAX_PATH_NUMBER3_OPERATION;
+ for (bit = head->read_bit; bit < TOMOYO_MAX_MKDEV_OPERATION;
bit++) {
if (!(perm & (1 << bit)))
continue;
pos = head->read_avail;
if (!tomoyo_io_printf(head, "allow_%s",
- tomoyo_path_number32keyword(bit)) ||
+ tomoyo_mkdev2keyword(bit)) ||
!tomoyo_print_name_union(head, &ptr->name) ||
!tomoyo_print_number_union(head, &ptr->mode) ||
!tomoyo_print_number_union(head, &ptr->major) ||
{
const u8 acl_type = ptr->type;
+ if (ptr->is_deleted)
+ return true;
if (acl_type == TOMOYO_TYPE_PATH_ACL) {
struct tomoyo_path_acl *acl
= container_of(ptr, struct tomoyo_path_acl, head);
head);
return tomoyo_print_path_number_acl(head, acl);
}
- if (acl_type == TOMOYO_TYPE_PATH_NUMBER3_ACL) {
- struct tomoyo_path_number3_acl *acl
- = container_of(ptr, struct tomoyo_path_number3_acl,
+ if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
+ struct tomoyo_mkdev_acl *acl
+ = container_of(ptr, struct tomoyo_mkdev_acl,
head);
- return tomoyo_print_path_number3_acl(head, acl);
+ return tomoyo_print_mkdev_acl(head, acl);
}
if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
struct tomoyo_mount_acl *acl
* This is equivalent to doing
*
* ( echo "select " $domainname; echo "use_profile " $profile ) |
- * /usr/lib/ccs/loadpolicy -d
+ * /usr/sbin/tomoyo-loadpolicy -d
*
* Caller holds tomoyo_read_lock().
*/
if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN))
return tomoyo_write_domain_initializer_policy(data, true,
is_delete);
+ if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_AGGREGATOR))
+ return tomoyo_write_aggregator_policy(data, is_delete);
if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALIAS))
return tomoyo_write_alias_policy(data, is_delete);
if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALLOW_READ))
head->read_var2 = NULL;
head->read_step = 6;
case 6:
+ if (!tomoyo_read_aggregator_policy(head))
+ break;
head->read_var2 = NULL;
head->read_step = 7;
case 7:
return 0;
}
-/* path to policy loader */
-static const char *tomoyo_loader = "/sbin/tomoyo-init";
-
-/**
- * tomoyo_policy_loader_exists - Check whether /sbin/tomoyo-init exists.
- *
- * Returns true if /sbin/tomoyo-init exists, false otherwise.
- */
-static bool tomoyo_policy_loader_exists(void)
-{
- /*
- * Don't activate MAC if the policy loader doesn't exist.
- * If the initrd includes /sbin/init but real-root-dev has not
- * mounted on / yet, activating MAC will block the system since
- * policies are not loaded yet.
- * Thus, let do_execve() call this function everytime.
- */
- struct path path;
-
- if (kern_path(tomoyo_loader, LOOKUP_FOLLOW, &path)) {
- printk(KERN_INFO "Not activating Mandatory Access Control now "
- "since %s doesn't exist.\n", tomoyo_loader);
- return false;
- }
- path_put(&path);
- return true;
-}
-
-/**
- * tomoyo_load_policy - Run external policy loader to load policy.
- *
- * @filename: The program about to start.
- *
- * This function checks whether @filename is /sbin/init , and if so
- * invoke /sbin/tomoyo-init and wait for the termination of /sbin/tomoyo-init
- * and then continues invocation of /sbin/init.
- * /sbin/tomoyo-init reads policy files in /etc/tomoyo/ directory and
- * writes to /sys/kernel/security/tomoyo/ interfaces.
- *
- * Returns nothing.
- */
-void tomoyo_load_policy(const char *filename)
-{
- char *argv[2];
- char *envp[3];
-
- if (tomoyo_policy_loaded)
- return;
- /*
- * Check filename is /sbin/init or /sbin/tomoyo-start.
- * /sbin/tomoyo-start is a dummy filename in case where /sbin/init can't
- * be passed.
- * You can create /sbin/tomoyo-start by
- * "ln -s /bin/true /sbin/tomoyo-start".
- */
- if (strcmp(filename, "/sbin/init") &&
- strcmp(filename, "/sbin/tomoyo-start"))
- return;
- if (!tomoyo_policy_loader_exists())
- return;
-
- printk(KERN_INFO "Calling %s to load policy. Please wait.\n",
- tomoyo_loader);
- argv[0] = (char *) tomoyo_loader;
- argv[1] = NULL;
- envp[0] = "HOME=/";
- envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
- envp[2] = NULL;
- call_usermodehelper(argv[0], argv, envp, 1);
-
- printk(KERN_INFO "TOMOYO: 2.2.0 2009/04/01\n");
- printk(KERN_INFO "Mandatory Access Control activated.\n");
- tomoyo_policy_loaded = true;
- { /* Check all profiles currently assigned to domains are defined. */
- struct tomoyo_domain_info *domain;
- list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
- const u8 profile = domain->profile;
- if (tomoyo_profile_ptr[profile])
- continue;
- panic("Profile %u (used by '%s') not defined.\n",
- profile, domain->domainname->name);
- }
- }
-}
-
/**
* tomoyo_print_header - Get header line of audit log.
*
static int tomoyo_read_version(struct tomoyo_io_buffer *head)
{
if (!head->read_eof) {
- tomoyo_io_printf(head, "2.2.0");
+ tomoyo_io_printf(head, "2.3.0-pre");
head->read_eof = true;
}
return 0;
*
* Caller acquires tomoyo_read_lock().
*/
-static int tomoyo_open_control(const u8 type, struct file *file)
+int tomoyo_open_control(const u8 type, struct file *file)
{
struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS);
*
* Caller holds tomoyo_read_lock().
*/
-static int tomoyo_read_control(struct file *file, char __user *buffer,
- const int buffer_len)
+int tomoyo_read_control(struct file *file, char __user *buffer,
+ const int buffer_len)
{
int len = 0;
struct tomoyo_io_buffer *head = file->private_data;
*
* Caller holds tomoyo_read_lock().
*/
-static int tomoyo_write_control(struct file *file, const char __user *buffer,
- const int buffer_len)
+int tomoyo_write_control(struct file *file, const char __user *buffer,
+ const int buffer_len)
{
struct tomoyo_io_buffer *head = file->private_data;
int error = buffer_len;
/* Don't allow updating policies by non manager programs. */
if (head->write != tomoyo_write_pid &&
head->write != tomoyo_write_domain_policy &&
- !tomoyo_is_policy_manager())
+ !tomoyo_policy_manager())
return -EPERM;
if (mutex_lock_interruptible(&head->io_sem))
return -EINTR;
*
* Caller looses tomoyo_read_lock().
*/
-static int tomoyo_close_control(struct file *file)
+int tomoyo_close_control(struct file *file)
{
struct tomoyo_io_buffer *head = file->private_data;
const bool is_write = !!head->write_buf;
}
/**
- * tomoyo_open - open() for /sys/kernel/security/tomoyo/ interface.
- *
- * @inode: Pointer to "struct inode".
- * @file: Pointer to "struct file".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_open(struct inode *inode, struct file *file)
-{
- const int key = ((u8 *) file->f_path.dentry->d_inode->i_private)
- - ((u8 *) NULL);
- return tomoyo_open_control(key, file);
-}
-
-/**
- * tomoyo_release - close() for /sys/kernel/security/tomoyo/ interface.
- *
- * @inode: Pointer to "struct inode".
- * @file: Pointer to "struct file".
- *
- * Returns 0 on success, negative value otherwise.
- */
-static int tomoyo_release(struct inode *inode, struct file *file)
-{
- return tomoyo_close_control(file);
-}
-
-/**
- * tomoyo_read - read() for /sys/kernel/security/tomoyo/ interface.
- *
- * @file: Pointer to "struct file".
- * @buf: Pointer to buffer.
- * @count: Size of @buf.
- * @ppos: Unused.
- *
- * Returns bytes read on success, negative value otherwise.
- */
-static ssize_t tomoyo_read(struct file *file, char __user *buf, size_t count,
- loff_t *ppos)
-{
- return tomoyo_read_control(file, buf, count);
-}
-
-/**
- * tomoyo_write - write() for /sys/kernel/security/tomoyo/ interface.
- *
- * @file: Pointer to "struct file".
- * @buf: Pointer to buffer.
- * @count: Size of @buf.
- * @ppos: Unused.
- *
- * Returns @count on success, negative value otherwise.
- */
-static ssize_t tomoyo_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- return tomoyo_write_control(file, buf, count);
-}
-
-/*
- * tomoyo_operations is a "struct file_operations" which is used for handling
- * /sys/kernel/security/tomoyo/ interface.
- *
- * Some files under /sys/kernel/security/tomoyo/ directory accept open(O_RDWR).
- * See tomoyo_io_buffer for internals.
- */
-static const struct file_operations tomoyo_operations = {
- .open = tomoyo_open,
- .release = tomoyo_release,
- .read = tomoyo_read,
- .write = tomoyo_write,
-};
-
-/**
- * tomoyo_create_entry - Create interface files under /sys/kernel/security/tomoyo/ directory.
- *
- * @name: The name of the interface file.
- * @mode: The permission of the interface file.
- * @parent: The parent directory.
- * @key: Type of interface.
- *
- * Returns nothing.
- */
-static void __init tomoyo_create_entry(const char *name, const mode_t mode,
- struct dentry *parent, const u8 key)
-{
- securityfs_create_file(name, mode, parent, ((u8 *) NULL) + key,
- &tomoyo_operations);
-}
-
-/**
- * tomoyo_initerface_init - Initialize /sys/kernel/security/tomoyo/ interface.
- *
- * Returns 0.
+ * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
*/
-static int __init tomoyo_initerface_init(void)
+void tomoyo_check_profile(void)
{
- struct dentry *tomoyo_dir;
-
- /* Don't create securityfs entries unless registered. */
- if (current_cred()->security != &tomoyo_kernel_domain)
- return 0;
-
- tomoyo_dir = securityfs_create_dir("tomoyo", NULL);
- tomoyo_create_entry("query", 0600, tomoyo_dir,
- TOMOYO_QUERY);
- tomoyo_create_entry("domain_policy", 0600, tomoyo_dir,
- TOMOYO_DOMAINPOLICY);
- tomoyo_create_entry("exception_policy", 0600, tomoyo_dir,
- TOMOYO_EXCEPTIONPOLICY);
- tomoyo_create_entry("self_domain", 0400, tomoyo_dir,
- TOMOYO_SELFDOMAIN);
- tomoyo_create_entry(".domain_status", 0600, tomoyo_dir,
- TOMOYO_DOMAIN_STATUS);
- tomoyo_create_entry(".process_status", 0600, tomoyo_dir,
- TOMOYO_PROCESS_STATUS);
- tomoyo_create_entry("meminfo", 0600, tomoyo_dir,
- TOMOYO_MEMINFO);
- tomoyo_create_entry("profile", 0600, tomoyo_dir,
- TOMOYO_PROFILE);
- tomoyo_create_entry("manager", 0600, tomoyo_dir,
- TOMOYO_MANAGER);
- tomoyo_create_entry("version", 0400, tomoyo_dir,
- TOMOYO_VERSION);
- return 0;
+ struct tomoyo_domain_info *domain;
+ const int idx = tomoyo_read_lock();
+ tomoyo_policy_loaded = true;
+ /* Check all profiles currently assigned to domains are defined. */
+ list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
+ const u8 profile = domain->profile;
+ if (tomoyo_profile_ptr[profile])
+ continue;
+ panic("Profile %u (used by '%s') not defined.\n",
+ profile, domain->domainname->name);
+ }
+ tomoyo_read_unlock(idx);
+ if (tomoyo_profile_version != 20090903)
+ panic("Profile version %u is not supported.\n",
+ tomoyo_profile_version);
+ printk(KERN_INFO "TOMOYO: 2.3.0-pre 2010/06/03\n");
+ printk(KERN_INFO "Mandatory Access Control activated.\n");
}
-
-fs_initcall(tomoyo_initerface_init);