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TOMOYO: Split files into some pieces.
security/tomoyo/common.c became too large to read. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
parent
17fcfbd9d4
commit
c3ef1500ec
@ -1 +1 @@
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obj-y = common.o realpath.o tomoyo.o domain.o file.o gc.o path_group.o number_group.o mount.o
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obj-y = common.o domain.o file.o gc.o load_policy.o memory.o mount.o number_group.o path_group.o realpath.o securityfs_if.o tomoyo.o util.o
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File diff suppressed because it is too large
Load Diff
@ -673,6 +673,31 @@ struct tomoyo_policy_manager_entry {
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extern asmlinkage long sys_getpid(void);
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extern asmlinkage long sys_getppid(void);
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/* Check whether the given string starts with the given keyword. */
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bool tomoyo_str_starts(char **src, const char *find);
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/* Get tomoyo_realpath() of current process. */
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const char *tomoyo_get_exe(void);
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/* Format string. */
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void tomoyo_normalize_line(unsigned char *buffer);
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/* Print warning or error message on console. */
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void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
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__attribute__ ((format(printf, 2, 3)));
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/* Check all profiles currently assigned to domains are defined. */
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void tomoyo_check_profile(void);
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/* Open operation for /sys/kernel/security/tomoyo/ interface. */
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int tomoyo_open_control(const u8 type, struct file *file);
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/* Close /sys/kernel/security/tomoyo/ interface. */
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int tomoyo_close_control(struct file *file);
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/* Read operation for /sys/kernel/security/tomoyo/ interface. */
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int tomoyo_read_control(struct file *file, char __user *buffer,
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const int buffer_len);
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/* Write operation for /sys/kernel/security/tomoyo/ interface. */
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int tomoyo_write_control(struct file *file, const char __user *buffer,
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const int buffer_len);
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/* Check whether the domain has too many ACL entries to hold. */
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bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
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/* Print out of memory warning message. */
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void tomoyo_warn_oom(const char *function);
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/* Check whether the given name matches the given name_union. */
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bool tomoyo_compare_name_union(const struct tomoyo_path_info *name,
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const struct tomoyo_name_union *ptr);
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@ -837,8 +862,8 @@ int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head);
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/* Set memory quota. */
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int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head);
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/* Initialize realpath related code. */
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void __init tomoyo_realpath_init(void);
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/* Initialize mm related code. */
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void __init tomoyo_mm_init(void);
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int tomoyo_check_exec_perm(struct tomoyo_domain_info *domain,
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const struct tomoyo_path_info *filename);
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int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
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@ -1,12 +1,9 @@
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/*
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* security/tomoyo/domain.c
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*
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* Implementation of the Domain-Based Mandatory Access Control.
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*
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* Copyright (C) 2005-2009 NTT DATA CORPORATION
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*
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* Version: 2.2.0 2009/04/01
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* Domain transition 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 "common.h"
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@ -697,24 +694,11 @@ int tomoyo_find_next_domain(struct linux_binprm *bprm)
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struct tomoyo_path_info rn; /* real name */
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struct tomoyo_path_info sn; /* symlink name */
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struct tomoyo_path_info ln; /* last name */
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static bool initialized;
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tomoyo_init_request_info(&r, NULL);
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if (!tmp)
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goto out;
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if (!initialized) {
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/*
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* Built-in initializers. This is needed because policies are
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* not loaded until starting /sbin/init.
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*/
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tomoyo_update_domain_initializer_entry(NULL, "/sbin/hotplug",
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false, false);
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tomoyo_update_domain_initializer_entry(NULL, "/sbin/modprobe",
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false, false);
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initialized = true;
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}
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retry:
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/* Get tomoyo_realpath of program. */
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retval = -ENOENT;
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@ -1,12 +1,9 @@
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/*
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* security/tomoyo/file.c
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*
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* Implementation of the Domain-Based Mandatory Access Control.
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*
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* Copyright (C) 2005-2009 NTT DATA CORPORATION
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*
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* Version: 2.2.0 2009/04/01
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* Pathname restriction functions.
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*
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* Copyright (C) 2005-2010 NTT DATA CORPORATION
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*/
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#include "common.h"
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@ -99,61 +96,6 @@ bool tomoyo_compare_number_union(const unsigned long value,
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return value >= ptr->values[0] && value <= ptr->values[1];
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}
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/**
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* tomoyo_init_request_info - Initialize "struct tomoyo_request_info" members.
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*
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* @r: Pointer to "struct tomoyo_request_info" to initialize.
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* @domain: Pointer to "struct tomoyo_domain_info". NULL for tomoyo_domain().
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*
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* Returns mode.
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*/
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int tomoyo_init_request_info(struct tomoyo_request_info *r,
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struct tomoyo_domain_info *domain)
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{
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memset(r, 0, sizeof(*r));
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if (!domain)
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domain = tomoyo_domain();
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r->domain = domain;
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r->mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
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return r->mode;
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}
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static void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
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__attribute__ ((format(printf, 2, 3)));
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/**
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* tomoyo_warn_log - Print warning or error message on console.
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*
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* @r: Pointer to "struct tomoyo_request_info".
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* @fmt: The printf()'s format string, followed by parameters.
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*/
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static void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
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{
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int len = PAGE_SIZE;
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va_list args;
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char *buffer;
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if (!tomoyo_verbose_mode(r->domain))
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return;
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while (1) {
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int len2;
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buffer = kmalloc(len, GFP_NOFS);
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if (!buffer)
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return;
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va_start(args, fmt);
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len2 = vsnprintf(buffer, len - 1, fmt, args);
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va_end(args);
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if (len2 <= len - 1) {
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buffer[len2] = '\0';
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break;
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}
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len = len2 + 1;
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kfree(buffer);
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}
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printk(KERN_WARNING "TOMOYO-%s: Access %s denied for %s\n",
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r->mode == TOMOYO_CONFIG_ENFORCING ? "ERROR" : "WARNING",
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buffer, tomoyo_get_last_name(r->domain));
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kfree(buffer);
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}
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/**
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* tomoyo_path2keyword - Get the name of single path operation.
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*
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81
security/tomoyo/load_policy.c
Normal file
81
security/tomoyo/load_policy.c
Normal file
@ -0,0 +1,81 @@
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/*
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* security/tomoyo/load_policy.c
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*
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* Policy loader launcher 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 "common.h"
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/* path to policy loader */
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static const char *tomoyo_loader = "/sbin/tomoyo-init";
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/**
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* tomoyo_policy_loader_exists - Check whether /sbin/tomoyo-init exists.
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*
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* Returns true if /sbin/tomoyo-init exists, false otherwise.
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*/
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static bool tomoyo_policy_loader_exists(void)
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{
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/*
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* Don't activate MAC if the policy loader doesn't exist.
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* If the initrd includes /sbin/init but real-root-dev has not
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* mounted on / yet, activating MAC will block the system since
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* policies are not loaded yet.
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* Thus, let do_execve() call this function everytime.
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*/
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struct path path;
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if (kern_path(tomoyo_loader, LOOKUP_FOLLOW, &path)) {
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printk(KERN_INFO "Not activating Mandatory Access Control now "
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"since %s doesn't exist.\n", tomoyo_loader);
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return false;
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}
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path_put(&path);
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return true;
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}
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/**
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* tomoyo_load_policy - Run external policy loader to load policy.
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*
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* @filename: The program about to start.
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*
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* This function checks whether @filename is /sbin/init , and if so
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* invoke /sbin/tomoyo-init and wait for the termination of /sbin/tomoyo-init
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* and then continues invocation of /sbin/init.
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* /sbin/tomoyo-init reads policy files in /etc/tomoyo/ directory and
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* writes to /sys/kernel/security/tomoyo/ interfaces.
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*
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* Returns nothing.
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*/
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void tomoyo_load_policy(const char *filename)
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{
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char *argv[2];
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char *envp[3];
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if (tomoyo_policy_loaded)
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return;
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/*
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* Check filename is /sbin/init or /sbin/tomoyo-start.
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* /sbin/tomoyo-start is a dummy filename in case where /sbin/init can't
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* be passed.
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* You can create /sbin/tomoyo-start by
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* "ln -s /bin/true /sbin/tomoyo-start".
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*/
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if (strcmp(filename, "/sbin/init") &&
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strcmp(filename, "/sbin/tomoyo-start"))
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return;
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if (!tomoyo_policy_loader_exists())
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return;
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printk(KERN_INFO "Calling %s to load policy. Please wait.\n",
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tomoyo_loader);
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argv[0] = (char *) tomoyo_loader;
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argv[1] = NULL;
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envp[0] = "HOME=/";
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envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
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envp[2] = NULL;
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call_usermodehelper(argv[0], argv, envp, 1);
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tomoyo_check_profile();
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}
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236
security/tomoyo/memory.c
Normal file
236
security/tomoyo/memory.c
Normal file
@ -0,0 +1,236 @@
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/*
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* security/tomoyo/memory.c
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*
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* Memory management 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/hash.h>
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#include <linux/slab.h>
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#include "common.h"
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/**
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* tomoyo_warn_oom - Print out of memory warning message.
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*
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* @function: Function's name.
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*/
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void tomoyo_warn_oom(const char *function)
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{
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/* Reduce error messages. */
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static pid_t tomoyo_last_pid;
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const pid_t pid = current->pid;
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if (tomoyo_last_pid != pid) {
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printk(KERN_WARNING "ERROR: Out of memory at %s.\n",
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function);
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tomoyo_last_pid = pid;
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}
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if (!tomoyo_policy_loaded)
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panic("MAC Initialization failed.\n");
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}
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/* Memory allocated for policy. */
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static atomic_t tomoyo_policy_memory_size;
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/* Quota for holding policy. */
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static unsigned int tomoyo_quota_for_policy;
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/**
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* tomoyo_memory_ok - Check memory quota.
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*
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* @ptr: Pointer to allocated memory.
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*
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* Returns true on success, false otherwise.
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*
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* Returns true if @ptr is not NULL and quota not exceeded, false otherwise.
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*/
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bool tomoyo_memory_ok(void *ptr)
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{
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size_t s = ptr ? ksize(ptr) : 0;
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atomic_add(s, &tomoyo_policy_memory_size);
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if (ptr && (!tomoyo_quota_for_policy ||
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atomic_read(&tomoyo_policy_memory_size)
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<= tomoyo_quota_for_policy)) {
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memset(ptr, 0, s);
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return true;
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}
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atomic_sub(s, &tomoyo_policy_memory_size);
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tomoyo_warn_oom(__func__);
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return false;
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}
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/**
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* tomoyo_commit_ok - Check memory quota.
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*
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* @data: Data to copy from.
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* @size: Size in byte.
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*
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* Returns pointer to allocated memory on success, NULL otherwise.
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* @data is zero-cleared on success.
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*/
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void *tomoyo_commit_ok(void *data, const unsigned int size)
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{
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void *ptr = kzalloc(size, GFP_NOFS);
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if (tomoyo_memory_ok(ptr)) {
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memmove(ptr, data, size);
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memset(data, 0, size);
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return ptr;
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}
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return NULL;
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}
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/**
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* tomoyo_memory_free - Free memory for elements.
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*
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* @ptr: Pointer to allocated memory.
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*/
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void tomoyo_memory_free(void *ptr)
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{
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atomic_sub(ksize(ptr), &tomoyo_policy_memory_size);
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kfree(ptr);
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}
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/*
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* tomoyo_name_list is used for holding string data used by TOMOYO.
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* Since same string data is likely used for multiple times (e.g.
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* "/lib/libc-2.5.so"), TOMOYO shares string data in the form of
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* "const struct tomoyo_path_info *".
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*/
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struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
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/**
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* tomoyo_get_name - Allocate permanent memory for string data.
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*
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* @name: The string to store into the permernent memory.
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*
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* Returns pointer to "struct tomoyo_path_info" on success, NULL otherwise.
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*/
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const struct tomoyo_path_info *tomoyo_get_name(const char *name)
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{
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struct tomoyo_name_entry *ptr;
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unsigned int hash;
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int len;
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int allocated_len;
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struct list_head *head;
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if (!name)
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return NULL;
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len = strlen(name) + 1;
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hash = full_name_hash((const unsigned char *) name, len - 1);
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head = &tomoyo_name_list[hash_long(hash, TOMOYO_HASH_BITS)];
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if (mutex_lock_interruptible(&tomoyo_policy_lock))
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return NULL;
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list_for_each_entry(ptr, head, list) {
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if (hash != ptr->entry.hash || strcmp(name, ptr->entry.name))
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continue;
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atomic_inc(&ptr->users);
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goto out;
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}
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ptr = kzalloc(sizeof(*ptr) + len, GFP_NOFS);
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allocated_len = ptr ? ksize(ptr) : 0;
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if (!ptr || (tomoyo_quota_for_policy &&
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atomic_read(&tomoyo_policy_memory_size) + allocated_len
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> tomoyo_quota_for_policy)) {
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kfree(ptr);
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ptr = NULL;
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tomoyo_warn_oom(__func__);
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goto out;
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}
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atomic_add(allocated_len, &tomoyo_policy_memory_size);
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ptr->entry.name = ((char *) ptr) + sizeof(*ptr);
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memmove((char *) ptr->entry.name, name, len);
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atomic_set(&ptr->users, 1);
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tomoyo_fill_path_info(&ptr->entry);
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list_add_tail(&ptr->list, head);
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out:
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mutex_unlock(&tomoyo_policy_lock);
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return ptr ? &ptr->entry : NULL;
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}
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/**
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* tomoyo_mm_init - Initialize mm related code.
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*/
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void __init tomoyo_mm_init(void)
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{
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int idx;
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BUILD_BUG_ON(TOMOYO_MAX_PATHNAME_LEN > PATH_MAX);
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for (idx = 0; idx < TOMOYO_MAX_HASH; idx++)
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INIT_LIST_HEAD(&tomoyo_name_list[idx]);
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INIT_LIST_HEAD(&tomoyo_kernel_domain.acl_info_list);
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tomoyo_kernel_domain.domainname = tomoyo_get_name(TOMOYO_ROOT_NAME);
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list_add_tail_rcu(&tomoyo_kernel_domain.list, &tomoyo_domain_list);
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idx = tomoyo_read_lock();
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if (tomoyo_find_domain(TOMOYO_ROOT_NAME) != &tomoyo_kernel_domain)
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panic("Can't register tomoyo_kernel_domain");
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{
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/* Load built-in policy. */
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tomoyo_write_domain_initializer_policy("/sbin/hotplug",
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false, false);
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tomoyo_write_domain_initializer_policy("/sbin/modprobe",
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false, false);
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}
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tomoyo_read_unlock(idx);
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}
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/* Memory allocated for query lists. */
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unsigned int tomoyo_query_memory_size;
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/* Quota for holding query lists. */
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unsigned int tomoyo_quota_for_query;
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/**
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* tomoyo_read_memory_counter - Check for memory usage in bytes.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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*
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* Returns memory usage.
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*/
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int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head)
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{
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if (!head->read_eof) {
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const unsigned int policy
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= atomic_read(&tomoyo_policy_memory_size);
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const unsigned int query = tomoyo_query_memory_size;
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char buffer[64];
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memset(buffer, 0, sizeof(buffer));
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if (tomoyo_quota_for_policy)
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snprintf(buffer, sizeof(buffer) - 1,
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" (Quota: %10u)",
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tomoyo_quota_for_policy);
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else
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buffer[0] = '\0';
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tomoyo_io_printf(head, "Policy: %10u%s\n", policy,
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buffer);
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if (tomoyo_quota_for_query)
|
||||
snprintf(buffer, sizeof(buffer) - 1,
|
||||
" (Quota: %10u)",
|
||||
tomoyo_quota_for_query);
|
||||
else
|
||||
buffer[0] = '\0';
|
||||
tomoyo_io_printf(head, "Query lists: %10u%s\n", query,
|
||||
buffer);
|
||||
tomoyo_io_printf(head, "Total: %10u\n", policy + query);
|
||||
head->read_eof = true;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* tomoyo_write_memory_quota - Set memory quota.
|
||||
*
|
||||
* @head: Pointer to "struct tomoyo_io_buffer".
|
||||
*
|
||||
* Returns 0.
|
||||
*/
|
||||
int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head)
|
||||
{
|
||||
char *data = head->write_buf;
|
||||
unsigned int size;
|
||||
|
||||
if (sscanf(data, "Policy: %u", &size) == 1)
|
||||
tomoyo_quota_for_policy = size;
|
||||
else if (sscanf(data, "Query lists: %u", &size) == 1)
|
||||
tomoyo_quota_for_query = size;
|
||||
return 0;
|
||||
}
|
@ -1,19 +1,15 @@
|
||||
/*
|
||||
* security/tomoyo/realpath.c
|
||||
*
|
||||
* Get the canonicalized absolute pathnames. The basis for TOMOYO.
|
||||
*
|
||||
* Copyright (C) 2005-2009 NTT DATA CORPORATION
|
||||
*
|
||||
* Version: 2.2.0 2009/04/01
|
||||
* Pathname calculation functions for TOMOYO.
|
||||
*
|
||||
* Copyright (C) 2005-2010 NTT DATA CORPORATION
|
||||
*/
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/mount.h>
|
||||
#include <linux/mnt_namespace.h>
|
||||
#include <linux/fs_struct.h>
|
||||
#include <linux/hash.h>
|
||||
#include <linux/magic.h>
|
||||
#include <linux/slab.h>
|
||||
#include "common.h"
|
||||
@ -123,7 +119,7 @@ int tomoyo_realpath_from_path2(struct path *path, char *newname,
|
||||
}
|
||||
}
|
||||
if (error)
|
||||
printk(KERN_WARNING "tomoyo_realpath: Pathname too long.\n");
|
||||
tomoyo_warn_oom(__func__);
|
||||
return error;
|
||||
}
|
||||
|
||||
@ -141,6 +137,7 @@ char *tomoyo_realpath_from_path(struct path *path)
|
||||
{
|
||||
char *buf = kzalloc(sizeof(struct tomoyo_page_buffer), GFP_NOFS);
|
||||
|
||||
BUILD_BUG_ON(TOMOYO_MAX_PATHNAME_LEN > PATH_MAX);
|
||||
BUILD_BUG_ON(sizeof(struct tomoyo_page_buffer)
|
||||
<= TOMOYO_MAX_PATHNAME_LEN - 1);
|
||||
if (!buf)
|
||||
@ -189,206 +186,3 @@ char *tomoyo_realpath_nofollow(const char *pathname)
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Memory allocated for non-string data. */
|
||||
static atomic_t tomoyo_policy_memory_size;
|
||||
/* Quota for holding policy. */
|
||||
static unsigned int tomoyo_quota_for_policy;
|
||||
|
||||
/**
|
||||
* tomoyo_memory_ok - Check memory quota.
|
||||
*
|
||||
* @ptr: Pointer to allocated memory.
|
||||
*
|
||||
* Returns true on success, false otherwise.
|
||||
*
|
||||
* Caller holds tomoyo_policy_lock.
|
||||
* Memory pointed by @ptr will be zeroed on success.
|
||||
*/
|
||||
bool tomoyo_memory_ok(void *ptr)
|
||||
{
|
||||
int allocated_len = ptr ? ksize(ptr) : 0;
|
||||
atomic_add(allocated_len, &tomoyo_policy_memory_size);
|
||||
if (ptr && (!tomoyo_quota_for_policy ||
|
||||
atomic_read(&tomoyo_policy_memory_size)
|
||||
<= tomoyo_quota_for_policy)) {
|
||||
memset(ptr, 0, allocated_len);
|
||||
return true;
|
||||
}
|
||||
printk(KERN_WARNING "ERROR: Out of memory "
|
||||
"for tomoyo_alloc_element().\n");
|
||||
if (!tomoyo_policy_loaded)
|
||||
panic("MAC Initialization failed.\n");
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* tomoyo_commit_ok - Check memory quota.
|
||||
*
|
||||
* @data: Data to copy from.
|
||||
* @size: Size in byte.
|
||||
*
|
||||
* Returns pointer to allocated memory on success, NULL otherwise.
|
||||
*/
|
||||
void *tomoyo_commit_ok(void *data, const unsigned int size)
|
||||
{
|
||||
void *ptr = kzalloc(size, GFP_NOFS);
|
||||
if (tomoyo_memory_ok(ptr)) {
|
||||
memmove(ptr, data, size);
|
||||
memset(data, 0, size);
|
||||
return ptr;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* tomoyo_memory_free - Free memory for elements.
|
||||
*
|
||||
* @ptr: Pointer to allocated memory.
|
||||
*/
|
||||
void tomoyo_memory_free(void *ptr)
|
||||
{
|
||||
atomic_sub(ksize(ptr), &tomoyo_policy_memory_size);
|
||||
kfree(ptr);
|
||||
}
|
||||
|
||||
/*
|
||||
* tomoyo_name_list is used for holding string data used by TOMOYO.
|
||||
* Since same string data is likely used for multiple times (e.g.
|
||||
* "/lib/libc-2.5.so"), TOMOYO shares string data in the form of
|
||||
* "const struct tomoyo_path_info *".
|
||||
*/
|
||||
struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
|
||||
|
||||
/**
|
||||
* tomoyo_get_name - Allocate permanent memory for string data.
|
||||
*
|
||||
* @name: The string to store into the permernent memory.
|
||||
*
|
||||
* Returns pointer to "struct tomoyo_path_info" on success, NULL otherwise.
|
||||
*/
|
||||
const struct tomoyo_path_info *tomoyo_get_name(const char *name)
|
||||
{
|
||||
struct tomoyo_name_entry *ptr;
|
||||
unsigned int hash;
|
||||
int len;
|
||||
int allocated_len;
|
||||
struct list_head *head;
|
||||
|
||||
if (!name)
|
||||
return NULL;
|
||||
len = strlen(name) + 1;
|
||||
hash = full_name_hash((const unsigned char *) name, len - 1);
|
||||
head = &tomoyo_name_list[hash_long(hash, TOMOYO_HASH_BITS)];
|
||||
if (mutex_lock_interruptible(&tomoyo_policy_lock))
|
||||
return NULL;
|
||||
list_for_each_entry(ptr, head, list) {
|
||||
if (hash != ptr->entry.hash || strcmp(name, ptr->entry.name))
|
||||
continue;
|
||||
atomic_inc(&ptr->users);
|
||||
goto out;
|
||||
}
|
||||
ptr = kzalloc(sizeof(*ptr) + len, GFP_NOFS);
|
||||
allocated_len = ptr ? ksize(ptr) : 0;
|
||||
if (!ptr || (tomoyo_quota_for_policy &&
|
||||
atomic_read(&tomoyo_policy_memory_size) + allocated_len
|
||||
> tomoyo_quota_for_policy)) {
|
||||
kfree(ptr);
|
||||
printk(KERN_WARNING "ERROR: Out of memory "
|
||||
"for tomoyo_get_name().\n");
|
||||
if (!tomoyo_policy_loaded)
|
||||
panic("MAC Initialization failed.\n");
|
||||
ptr = NULL;
|
||||
goto out;
|
||||
}
|
||||
atomic_add(allocated_len, &tomoyo_policy_memory_size);
|
||||
ptr->entry.name = ((char *) ptr) + sizeof(*ptr);
|
||||
memmove((char *) ptr->entry.name, name, len);
|
||||
atomic_set(&ptr->users, 1);
|
||||
tomoyo_fill_path_info(&ptr->entry);
|
||||
list_add_tail(&ptr->list, head);
|
||||
out:
|
||||
mutex_unlock(&tomoyo_policy_lock);
|
||||
return ptr ? &ptr->entry : NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* tomoyo_realpath_init - Initialize realpath related code.
|
||||
*/
|
||||
void __init tomoyo_realpath_init(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
BUILD_BUG_ON(TOMOYO_MAX_PATHNAME_LEN > PATH_MAX);
|
||||
for (i = 0; i < TOMOYO_MAX_HASH; i++)
|
||||
INIT_LIST_HEAD(&tomoyo_name_list[i]);
|
||||
INIT_LIST_HEAD(&tomoyo_kernel_domain.acl_info_list);
|
||||
tomoyo_kernel_domain.domainname = tomoyo_get_name(TOMOYO_ROOT_NAME);
|
||||
/*
|
||||
* tomoyo_read_lock() is not needed because this function is
|
||||
* called before the first "delete" request.
|
||||
*/
|
||||
list_add_tail_rcu(&tomoyo_kernel_domain.list, &tomoyo_domain_list);
|
||||
if (tomoyo_find_domain(TOMOYO_ROOT_NAME) != &tomoyo_kernel_domain)
|
||||
panic("Can't register tomoyo_kernel_domain");
|
||||
}
|
||||
|
||||
unsigned int tomoyo_quota_for_query;
|
||||
unsigned int tomoyo_query_memory_size;
|
||||
|
||||
/**
|
||||
* tomoyo_read_memory_counter - Check for memory usage in bytes.
|
||||
*
|
||||
* @head: Pointer to "struct tomoyo_io_buffer".
|
||||
*
|
||||
* Returns memory usage.
|
||||
*/
|
||||
int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head)
|
||||
{
|
||||
if (!head->read_eof) {
|
||||
const unsigned int policy
|
||||
= atomic_read(&tomoyo_policy_memory_size);
|
||||
const unsigned int query = tomoyo_query_memory_size;
|
||||
char buffer[64];
|
||||
|
||||
memset(buffer, 0, sizeof(buffer));
|
||||
if (tomoyo_quota_for_policy)
|
||||
snprintf(buffer, sizeof(buffer) - 1,
|
||||
" (Quota: %10u)",
|
||||
tomoyo_quota_for_policy);
|
||||
else
|
||||
buffer[0] = '\0';
|
||||
tomoyo_io_printf(head, "Policy: %10u%s\n", policy,
|
||||
buffer);
|
||||
if (tomoyo_quota_for_query)
|
||||
snprintf(buffer, sizeof(buffer) - 1,
|
||||
" (Quota: %10u)",
|
||||
tomoyo_quota_for_query);
|
||||
else
|
||||
buffer[0] = '\0';
|
||||
tomoyo_io_printf(head, "Query lists: %10u%s\n", query,
|
||||
buffer);
|
||||
tomoyo_io_printf(head, "Total: %10u\n", policy + query);
|
||||
head->read_eof = true;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* tomoyo_write_memory_quota - Set memory quota.
|
||||
*
|
||||
* @head: Pointer to "struct tomoyo_io_buffer".
|
||||
*
|
||||
* Returns 0.
|
||||
*/
|
||||
int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head)
|
||||
{
|
||||
char *data = head->write_buf;
|
||||
unsigned int size;
|
||||
|
||||
if (sscanf(data, "Policy: %u", &size) == 1)
|
||||
tomoyo_quota_for_policy = size;
|
||||
else if (sscanf(data, "Query lists: %u", &size) == 1)
|
||||
tomoyo_quota_for_query = size;
|
||||
return 0;
|
||||
}
|
||||
|
140
security/tomoyo/securityfs_if.c
Normal file
140
security/tomoyo/securityfs_if.c
Normal file
@ -0,0 +1,140 @@
|
||||
/*
|
||||
* security/tomoyo/common.c
|
||||
*
|
||||
* Securityfs interface for TOMOYO.
|
||||
*
|
||||
* Copyright (C) 2005-2010 NTT DATA CORPORATION
|
||||
*/
|
||||
|
||||
#include <linux/security.h>
|
||||
#include "common.h"
|
||||
|
||||
/**
|
||||
* 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.
|
||||
*/
|
||||
static int __init tomoyo_initerface_init(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;
|
||||
}
|
||||
|
||||
fs_initcall(tomoyo_initerface_init);
|
@ -3,10 +3,7 @@
|
||||
*
|
||||
* LSM hooks for TOMOYO Linux.
|
||||
*
|
||||
* Copyright (C) 2005-2009 NTT DATA CORPORATION
|
||||
*
|
||||
* Version: 2.2.0 2009/04/01
|
||||
*
|
||||
* Copyright (C) 2005-2010 NTT DATA CORPORATION
|
||||
*/
|
||||
|
||||
#include <linux/security.h>
|
||||
@ -286,7 +283,7 @@ static int __init tomoyo_init(void)
|
||||
panic("Failure registering TOMOYO Linux");
|
||||
printk(KERN_INFO "TOMOYO Linux initialized\n");
|
||||
cred->security = &tomoyo_kernel_domain;
|
||||
tomoyo_realpath_init();
|
||||
tomoyo_mm_init();
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
951
security/tomoyo/util.c
Normal file
951
security/tomoyo/util.c
Normal file
@ -0,0 +1,951 @@
|
||||
/*
|
||||
* security/tomoyo/util.c
|
||||
*
|
||||
* Utility functions for TOMOYO.
|
||||
*
|
||||
* Copyright (C) 2005-2010 NTT DATA CORPORATION
|
||||
*/
|
||||
|
||||
#include <linux/slab.h>
|
||||
#include "common.h"
|
||||
|
||||
/* Lock for protecting policy. */
|
||||
DEFINE_MUTEX(tomoyo_policy_lock);
|
||||
|
||||
/* Has /sbin/init started? */
|
||||
bool tomoyo_policy_loaded;
|
||||
|
||||
/**
|
||||
* 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_parse_name_union - Parse a tomoyo_name_union.
|
||||
*
|
||||
* @filename: Name or name group.
|
||||
* @ptr: Pointer to "struct tomoyo_name_union".
|
||||
*
|
||||
* Returns true on success, false otherwise.
|
||||
*/
|
||||
bool tomoyo_parse_name_union(const char *filename,
|
||||
struct tomoyo_name_union *ptr)
|
||||
{
|
||||
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;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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 is a \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.
|
||||
*/
|
||||
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.
|
||||
*/
|
||||
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 '/' 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_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().
|
||||
*
|
||||
* Returns mode.
|
||||
*/
|
||||
int tomoyo_init_request_info(struct tomoyo_request_info *r,
|
||||
struct tomoyo_domain_info *domain)
|
||||
{
|
||||
memset(r, 0, sizeof(*r));
|
||||
if (!domain)
|
||||
domain = tomoyo_domain();
|
||||
r->domain = domain;
|
||||
r->mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
|
||||
return r->mode;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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, ...)
|
||||
{
|
||||
int len = PAGE_SIZE;
|
||||
va_list args;
|
||||
char *buffer;
|
||||
if (!tomoyo_verbose_mode(r->domain))
|
||||
return;
|
||||
while (1) {
|
||||
int len2;
|
||||
buffer = kmalloc(len, GFP_NOFS);
|
||||
if (!buffer)
|
||||
return;
|
||||
va_start(args, fmt);
|
||||
len2 = vsnprintf(buffer, len - 1, fmt, args);
|
||||
va_end(args);
|
||||
if (len2 <= len - 1) {
|
||||
buffer[len2] = '\0';
|
||||
break;
|
||||
}
|
||||
len = len2 + 1;
|
||||
kfree(buffer);
|
||||
}
|
||||
printk(KERN_WARNING "TOMOYO-%s: Access %s denied for %s\n",
|
||||
r->mode == TOMOYO_CONFIG_ENFORCING ? "ERROR" : "WARNING",
|
||||
buffer, tomoyo_get_last_name(r->domain));
|
||||
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) {
|
||||
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;
|
||||
}
|
Loading…
Reference in New Issue
Block a user