forked from luck/tmp_suning_uos_patched
c3ef1500ec
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>
82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
/*
|
|
* security/tomoyo/load_policy.c
|
|
*
|
|
* Policy loader launcher for TOMOYO.
|
|
*
|
|
* Copyright (C) 2005-2010 NTT DATA CORPORATION
|
|
*/
|
|
|
|
#include "common.h"
|
|
|
|
/* path to policy loader */
|
|
static const char *tomoyo_loader = "/sbin/tomoyo-init";
|
|
|
|
/**
|
|
* tomoyo_policy_loader_exists - Check whether /sbin/tomoyo-init exists.
|
|
*
|
|
* Returns true if /sbin/tomoyo-init exists, false otherwise.
|
|
*/
|
|
static bool tomoyo_policy_loader_exists(void)
|
|
{
|
|
/*
|
|
* Don't activate MAC if the policy loader doesn't exist.
|
|
* If the initrd includes /sbin/init but real-root-dev has not
|
|
* mounted on / yet, activating MAC will block the system since
|
|
* policies are not loaded yet.
|
|
* Thus, let do_execve() call this function everytime.
|
|
*/
|
|
struct path path;
|
|
|
|
if (kern_path(tomoyo_loader, LOOKUP_FOLLOW, &path)) {
|
|
printk(KERN_INFO "Not activating Mandatory Access Control now "
|
|
"since %s doesn't exist.\n", tomoyo_loader);
|
|
return false;
|
|
}
|
|
path_put(&path);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_load_policy - Run external policy loader to load policy.
|
|
*
|
|
* @filename: The program about to start.
|
|
*
|
|
* This function checks whether @filename is /sbin/init , and if so
|
|
* invoke /sbin/tomoyo-init and wait for the termination of /sbin/tomoyo-init
|
|
* and then continues invocation of /sbin/init.
|
|
* /sbin/tomoyo-init reads policy files in /etc/tomoyo/ directory and
|
|
* writes to /sys/kernel/security/tomoyo/ interfaces.
|
|
*
|
|
* Returns nothing.
|
|
*/
|
|
void tomoyo_load_policy(const char *filename)
|
|
{
|
|
char *argv[2];
|
|
char *envp[3];
|
|
|
|
if (tomoyo_policy_loaded)
|
|
return;
|
|
/*
|
|
* Check filename is /sbin/init or /sbin/tomoyo-start.
|
|
* /sbin/tomoyo-start is a dummy filename in case where /sbin/init can't
|
|
* be passed.
|
|
* You can create /sbin/tomoyo-start by
|
|
* "ln -s /bin/true /sbin/tomoyo-start".
|
|
*/
|
|
if (strcmp(filename, "/sbin/init") &&
|
|
strcmp(filename, "/sbin/tomoyo-start"))
|
|
return;
|
|
if (!tomoyo_policy_loader_exists())
|
|
return;
|
|
|
|
printk(KERN_INFO "Calling %s to load policy. Please wait.\n",
|
|
tomoyo_loader);
|
|
argv[0] = (char *) tomoyo_loader;
|
|
argv[1] = NULL;
|
|
envp[0] = "HOME=/";
|
|
envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
|
|
envp[2] = NULL;
|
|
call_usermodehelper(argv[0], argv, envp, 1);
|
|
tomoyo_check_profile();
|
|
}
|