964 строки
23 KiB
C
964 строки
23 KiB
C
/*
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* security/tomoyo/util.c
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*
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* Utility functions for TOMOYO.
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*
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* Copyright (C) 2005-2010 NTT DATA CORPORATION
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*/
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#include <linux/slab.h>
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#include "common.h"
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/* Lock for protecting policy. */
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DEFINE_MUTEX(tomoyo_policy_lock);
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/* Has /sbin/init started? */
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bool tomoyo_policy_loaded;
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/**
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* tomoyo_parse_ulong - Parse an "unsigned long" value.
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*
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* @result: Pointer to "unsigned long".
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* @str: Pointer to string to parse.
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*
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* Returns value type on success, 0 otherwise.
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*
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* The @src is updated to point the first character after the value
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* on success.
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*/
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static u8 tomoyo_parse_ulong(unsigned long *result, char **str)
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{
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const char *cp = *str;
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char *ep;
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int base = 10;
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if (*cp == '0') {
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char c = *(cp + 1);
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if (c == 'x' || c == 'X') {
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base = 16;
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cp += 2;
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} else if (c >= '0' && c <= '7') {
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base = 8;
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cp++;
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}
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}
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*result = simple_strtoul(cp, &ep, base);
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if (cp == ep)
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return 0;
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*str = ep;
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switch (base) {
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case 16:
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return TOMOYO_VALUE_TYPE_HEXADECIMAL;
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case 8:
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return TOMOYO_VALUE_TYPE_OCTAL;
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default:
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return TOMOYO_VALUE_TYPE_DECIMAL;
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}
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}
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/**
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* tomoyo_print_ulong - Print an "unsigned long" value.
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*
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* @buffer: Pointer to buffer.
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* @buffer_len: Size of @buffer.
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* @value: An "unsigned long" value.
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* @type: Type of @value.
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*
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* Returns nothing.
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*/
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void tomoyo_print_ulong(char *buffer, const int buffer_len,
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const unsigned long value, const u8 type)
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{
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if (type == TOMOYO_VALUE_TYPE_DECIMAL)
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snprintf(buffer, buffer_len, "%lu", value);
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else if (type == TOMOYO_VALUE_TYPE_OCTAL)
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snprintf(buffer, buffer_len, "0%lo", value);
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else if (type == TOMOYO_VALUE_TYPE_HEXADECIMAL)
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snprintf(buffer, buffer_len, "0x%lX", value);
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else
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snprintf(buffer, buffer_len, "type(%u)", type);
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}
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/**
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* tomoyo_parse_name_union - Parse a tomoyo_name_union.
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*
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* @filename: Name or name group.
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* @ptr: Pointer to "struct tomoyo_name_union".
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*
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* Returns true on success, false otherwise.
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*/
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bool tomoyo_parse_name_union(const char *filename,
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struct tomoyo_name_union *ptr)
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{
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if (!tomoyo_correct_word(filename))
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return false;
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if (filename[0] == '@') {
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ptr->group = tomoyo_get_group(filename + 1, TOMOYO_PATH_GROUP);
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ptr->is_group = true;
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return ptr->group != NULL;
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}
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ptr->filename = tomoyo_get_name(filename);
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ptr->is_group = false;
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return ptr->filename != NULL;
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}
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/**
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* tomoyo_parse_number_union - Parse a tomoyo_number_union.
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*
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* @data: Number or number range or number group.
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* @ptr: Pointer to "struct tomoyo_number_union".
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*
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* Returns true on success, false otherwise.
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*/
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bool tomoyo_parse_number_union(char *data, struct tomoyo_number_union *num)
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{
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u8 type;
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unsigned long v;
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memset(num, 0, sizeof(*num));
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if (data[0] == '@') {
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if (!tomoyo_correct_word(data))
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return false;
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num->group = tomoyo_get_group(data + 1, TOMOYO_NUMBER_GROUP);
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num->is_group = true;
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return num->group != NULL;
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}
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type = tomoyo_parse_ulong(&v, &data);
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if (!type)
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return false;
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num->values[0] = v;
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num->min_type = type;
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if (!*data) {
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num->values[1] = v;
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num->max_type = type;
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return true;
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}
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if (*data++ != '-')
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return false;
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type = tomoyo_parse_ulong(&v, &data);
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if (!type || *data)
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return false;
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num->values[1] = v;
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num->max_type = type;
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return true;
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}
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/**
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* tomoyo_byte_range - Check whether the string is a \ooo style octal value.
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*
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* @str: Pointer to the string.
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*
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* Returns true if @str is a \ooo style octal value, false otherwise.
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*
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* TOMOYO uses \ooo style representation for 0x01 - 0x20 and 0x7F - 0xFF.
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* This function verifies that \ooo is in valid range.
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*/
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static inline bool tomoyo_byte_range(const char *str)
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{
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return *str >= '0' && *str++ <= '3' &&
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*str >= '0' && *str++ <= '7' &&
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*str >= '0' && *str <= '7';
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}
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/**
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* tomoyo_alphabet_char - Check whether the character is an alphabet.
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*
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* @c: The character to check.
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*
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* Returns true if @c is an alphabet character, false otherwise.
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*/
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static inline bool tomoyo_alphabet_char(const char c)
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{
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return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
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}
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/**
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* tomoyo_make_byte - Make byte value from three octal characters.
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*
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* @c1: The first character.
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* @c2: The second character.
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* @c3: The third character.
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*
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* Returns byte value.
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*/
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static inline u8 tomoyo_make_byte(const u8 c1, const u8 c2, const u8 c3)
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{
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return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0');
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}
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/**
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* tomoyo_str_starts - Check whether the given string starts with the given keyword.
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*
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* @src: Pointer to pointer to the string.
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* @find: Pointer to the keyword.
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*
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* Returns true if @src starts with @find, false otherwise.
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*
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* The @src is updated to point the first character after the @find
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* if @src starts with @find.
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*/
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bool tomoyo_str_starts(char **src, const char *find)
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{
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const int len = strlen(find);
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char *tmp = *src;
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if (strncmp(tmp, find, len))
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return false;
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tmp += len;
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*src = tmp;
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return true;
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}
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/**
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* tomoyo_normalize_line - Format string.
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*
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* @buffer: The line to normalize.
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*
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* Leading and trailing whitespaces are removed.
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* Multiple whitespaces are packed into single space.
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*
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* Returns nothing.
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*/
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void tomoyo_normalize_line(unsigned char *buffer)
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{
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unsigned char *sp = buffer;
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unsigned char *dp = buffer;
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bool first = true;
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while (tomoyo_invalid(*sp))
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sp++;
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while (*sp) {
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if (!first)
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*dp++ = ' ';
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first = false;
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while (tomoyo_valid(*sp))
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*dp++ = *sp++;
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while (tomoyo_invalid(*sp))
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sp++;
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}
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*dp = '\0';
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}
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/**
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* tomoyo_tokenize - Tokenize string.
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*
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* @buffer: The line to tokenize.
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* @w: Pointer to "char *".
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* @size: Sizeof @w .
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*
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* Returns true on success, false otherwise.
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*/
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bool tomoyo_tokenize(char *buffer, char *w[], size_t size)
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{
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int count = size / sizeof(char *);
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int i;
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for (i = 0; i < count; i++)
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w[i] = "";
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for (i = 0; i < count; i++) {
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char *cp = strchr(buffer, ' ');
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if (cp)
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*cp = '\0';
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w[i] = buffer;
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if (!cp)
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break;
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buffer = cp + 1;
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}
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return i < count || !*buffer;
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}
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/**
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* tomoyo_correct_word2 - Validate a string.
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*
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* @string: The string to check. May be non-'\0'-terminated.
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* @len: Length of @string.
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*
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* Check whether the given string follows the naming rules.
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* Returns true if @string follows the naming rules, false otherwise.
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*/
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static bool tomoyo_correct_word2(const char *string, size_t len)
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{
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const char *const start = string;
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bool in_repetition = false;
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unsigned char c;
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unsigned char d;
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unsigned char e;
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if (!len)
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goto out;
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while (len--) {
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c = *string++;
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if (c == '\\') {
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if (!len--)
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goto out;
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c = *string++;
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switch (c) {
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case '\\': /* "\\" */
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continue;
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case '$': /* "\$" */
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case '+': /* "\+" */
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case '?': /* "\?" */
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case '*': /* "\*" */
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case '@': /* "\@" */
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case 'x': /* "\x" */
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case 'X': /* "\X" */
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case 'a': /* "\a" */
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case 'A': /* "\A" */
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case '-': /* "\-" */
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continue;
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case '{': /* "/\{" */
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if (string - 3 < start || *(string - 3) != '/')
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break;
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in_repetition = true;
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continue;
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case '}': /* "\}/" */
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if (*string != '/')
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break;
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if (!in_repetition)
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break;
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in_repetition = false;
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continue;
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case '0': /* "\ooo" */
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case '1':
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case '2':
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case '3':
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if (!len-- || !len--)
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break;
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d = *string++;
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e = *string++;
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if (d < '0' || d > '7' || e < '0' || e > '7')
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break;
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c = tomoyo_make_byte(c, d, e);
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if (tomoyo_invalid(c))
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continue; /* pattern is not \000 */
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}
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goto out;
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} else if (in_repetition && c == '/') {
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goto out;
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} else if (tomoyo_invalid(c)) {
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goto out;
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}
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}
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if (in_repetition)
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goto out;
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return true;
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out:
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return false;
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}
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/**
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* tomoyo_correct_word - Validate a string.
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*
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* @string: The string to check.
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*
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* Check whether the given string follows the naming rules.
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* Returns true if @string follows the naming rules, false otherwise.
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*/
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bool tomoyo_correct_word(const char *string)
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{
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return tomoyo_correct_word2(string, strlen(string));
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}
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/**
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* tomoyo_correct_path - Validate a pathname.
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*
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* @filename: The pathname to check.
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*
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* Check whether the given pathname follows the naming rules.
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* Returns true if @filename follows the naming rules, false otherwise.
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*/
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bool tomoyo_correct_path(const char *filename)
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{
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return *filename == '/' && tomoyo_correct_word(filename);
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}
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/**
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* tomoyo_correct_domain - Check whether the given domainname follows the naming rules.
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*
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* @domainname: The domainname to check.
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*
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* Returns true if @domainname follows the naming rules, false otherwise.
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*/
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bool tomoyo_correct_domain(const unsigned char *domainname)
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{
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if (!domainname || strncmp(domainname, TOMOYO_ROOT_NAME,
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TOMOYO_ROOT_NAME_LEN))
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goto out;
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domainname += TOMOYO_ROOT_NAME_LEN;
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if (!*domainname)
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return true;
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if (*domainname++ != ' ')
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goto out;
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while (1) {
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const unsigned char *cp = strchr(domainname, ' ');
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if (!cp)
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break;
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if (*domainname != '/' ||
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!tomoyo_correct_word2(domainname, cp - domainname - 1))
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goto out;
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domainname = cp + 1;
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}
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return tomoyo_correct_path(domainname);
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out:
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return false;
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}
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/**
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* tomoyo_domain_def - Check whether the given token can be a domainname.
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*
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* @buffer: The token to check.
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*
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* Returns true if @buffer possibly be a domainname, false otherwise.
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*/
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bool tomoyo_domain_def(const unsigned char *buffer)
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{
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return !strncmp(buffer, TOMOYO_ROOT_NAME, TOMOYO_ROOT_NAME_LEN);
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}
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/**
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* tomoyo_find_domain - Find a domain by the given name.
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*
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* @domainname: The domainname to find.
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*
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* Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
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*
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* Caller holds tomoyo_read_lock().
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*/
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struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname)
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{
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struct tomoyo_domain_info *domain;
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struct tomoyo_path_info name;
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name.name = domainname;
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tomoyo_fill_path_info(&name);
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list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
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if (!domain->is_deleted &&
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!tomoyo_pathcmp(&name, domain->domainname))
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return domain;
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}
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return NULL;
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}
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/**
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* tomoyo_const_part_length - Evaluate the initial length without a pattern in a token.
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*
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* @filename: The string to evaluate.
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*
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* Returns the initial length without a pattern in @filename.
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*/
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static int tomoyo_const_part_length(const char *filename)
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{
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char c;
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int len = 0;
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if (!filename)
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return 0;
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while ((c = *filename++) != '\0') {
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if (c != '\\') {
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len++;
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continue;
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}
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c = *filename++;
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switch (c) {
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case '\\': /* "\\" */
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len += 2;
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continue;
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case '0': /* "\ooo" */
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case '1':
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case '2':
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case '3':
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c = *filename++;
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if (c < '0' || c > '7')
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break;
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c = *filename++;
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if (c < '0' || c > '7')
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break;
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len += 4;
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continue;
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}
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break;
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}
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return len;
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}
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/**
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* tomoyo_fill_path_info - Fill in "struct tomoyo_path_info" members.
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*
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* @ptr: Pointer to "struct tomoyo_path_info" to fill in.
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*
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* The caller sets "struct tomoyo_path_info"->name.
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*/
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void tomoyo_fill_path_info(struct tomoyo_path_info *ptr)
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{
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const char *name = ptr->name;
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const int len = strlen(name);
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|
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ptr->const_len = tomoyo_const_part_length(name);
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ptr->is_dir = len && (name[len - 1] == '/');
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ptr->is_patterned = (ptr->const_len < len);
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ptr->hash = full_name_hash(name, len);
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}
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|
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/**
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* tomoyo_file_matches_pattern2 - Pattern matching without '/' character and "\-" pattern.
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*
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* @filename: The start of string to check.
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* @filename_end: The end of string to check.
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* @pattern: The start of pattern to compare.
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* @pattern_end: The end of pattern to compare.
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*
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* Returns true if @filename matches @pattern, false otherwise.
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*/
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static bool tomoyo_file_matches_pattern2(const char *filename,
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const char *filename_end,
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const char *pattern,
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const char *pattern_end)
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{
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while (filename < filename_end && pattern < pattern_end) {
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char c;
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if (*pattern != '\\') {
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if (*filename++ != *pattern++)
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return false;
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continue;
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}
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c = *filename;
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pattern++;
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switch (*pattern) {
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int i;
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int j;
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case '?':
|
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if (c == '/') {
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return false;
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} else if (c == '\\') {
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if (filename[1] == '\\')
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filename++;
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else if (tomoyo_byte_range(filename + 1))
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filename += 3;
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else
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return false;
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}
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break;
|
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case '\\':
|
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if (c != '\\')
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return false;
|
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if (*++filename != '\\')
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return false;
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break;
|
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case '+':
|
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if (!isdigit(c))
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return false;
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break;
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case 'x':
|
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if (!isxdigit(c))
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return false;
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break;
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case 'a':
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if (!tomoyo_alphabet_char(c))
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return false;
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break;
|
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case '0':
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case '1':
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case '2':
|
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case '3':
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if (c == '\\' && tomoyo_byte_range(filename + 1)
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&& 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_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_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 '/' 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_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.
|
|
*/
|
|
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_get_mode - Get MAC mode.
|
|
*
|
|
* @profile: Profile number.
|
|
* @index: Index number of functionality.
|
|
*
|
|
* Returns mode.
|
|
*/
|
|
int tomoyo_get_mode(const u8 profile, const u8 index)
|
|
{
|
|
u8 mode;
|
|
const u8 category = TOMOYO_MAC_CATEGORY_FILE;
|
|
if (!tomoyo_policy_loaded)
|
|
return TOMOYO_CONFIG_DISABLED;
|
|
mode = tomoyo_profile(profile)->config[index];
|
|
if (mode == TOMOYO_CONFIG_USE_DEFAULT)
|
|
mode = tomoyo_profile(profile)->config[category];
|
|
if (mode == TOMOYO_CONFIG_USE_DEFAULT)
|
|
mode = tomoyo_profile(profile)->default_config;
|
|
return mode & 3;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_init_request_info - Initialize "struct tomoyo_request_info" members.
|
|
*
|
|
* @r: Pointer to "struct tomoyo_request_info" to initialize.
|
|
* @domain: Pointer to "struct tomoyo_domain_info". NULL for tomoyo_domain().
|
|
* @index: Index number of functionality.
|
|
*
|
|
* Returns mode.
|
|
*/
|
|
int tomoyo_init_request_info(struct tomoyo_request_info *r,
|
|
struct tomoyo_domain_info *domain, const u8 index)
|
|
{
|
|
u8 profile;
|
|
memset(r, 0, sizeof(*r));
|
|
if (!domain)
|
|
domain = tomoyo_domain();
|
|
r->domain = domain;
|
|
profile = domain->profile;
|
|
r->profile = profile;
|
|
r->type = index;
|
|
r->mode = tomoyo_get_mode(profile, index);
|
|
return r->mode;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_last_word - Get last component of a line.
|
|
*
|
|
* @line: A line.
|
|
*
|
|
* Returns the last word of a line.
|
|
*/
|
|
const char *tomoyo_last_word(const char *name)
|
|
{
|
|
const char *cp = strrchr(name, ' ');
|
|
if (cp)
|
|
return cp + 1;
|
|
return name;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_warn_log - Print warning or error message on console.
|
|
*
|
|
* @r: Pointer to "struct tomoyo_request_info".
|
|
* @fmt: The printf()'s format string, followed by parameters.
|
|
*/
|
|
void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
char *buffer;
|
|
const struct tomoyo_domain_info * const domain = r->domain;
|
|
const struct tomoyo_profile *profile = tomoyo_profile(domain->profile);
|
|
switch (r->mode) {
|
|
case TOMOYO_CONFIG_ENFORCING:
|
|
if (!profile->enforcing->enforcing_verbose)
|
|
return;
|
|
break;
|
|
case TOMOYO_CONFIG_PERMISSIVE:
|
|
if (!profile->permissive->permissive_verbose)
|
|
return;
|
|
break;
|
|
case TOMOYO_CONFIG_LEARNING:
|
|
if (!profile->learning->learning_verbose)
|
|
return;
|
|
break;
|
|
}
|
|
buffer = kmalloc(4096, GFP_NOFS);
|
|
if (!buffer)
|
|
return;
|
|
va_start(args, fmt);
|
|
vsnprintf(buffer, 4095, fmt, args);
|
|
va_end(args);
|
|
buffer[4095] = '\0';
|
|
printk(KERN_WARNING "%s: Access %s denied for %s\n",
|
|
r->mode == TOMOYO_CONFIG_ENFORCING ? "ERROR" : "WARNING", buffer,
|
|
tomoyo_last_word(domain->domainname->name));
|
|
kfree(buffer);
|
|
}
|
|
|
|
/**
|
|
* 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().
|
|
*/
|
|
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) {
|
|
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++;
|
|
}
|
|
}
|
|
if (count < tomoyo_profile(domain->profile)->learning->
|
|
learning_max_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;
|
|
}
|