mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
70834d3070
A few call_usermodehelper() callers use the hardcoded constant instead of the proper UMH_WAIT_PROC, fix them. Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Lars Ellenberg <drbd-dev@lists.linbit.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Michal Januszewski <spock@gentoo.org> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Kentaro Takeda <takedakn@nttdata.co.jp> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
/*
|
|
* security/tomoyo/load_policy.c
|
|
*
|
|
* Copyright (C) 2005-2011 NTT DATA CORPORATION
|
|
*/
|
|
|
|
#include "common.h"
|
|
|
|
#ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
|
|
|
|
/*
|
|
* Path to the policy loader. (default = CONFIG_SECURITY_TOMOYO_POLICY_LOADER)
|
|
*/
|
|
static const char *tomoyo_loader;
|
|
|
|
/**
|
|
* tomoyo_loader_setup - Set policy loader.
|
|
*
|
|
* @str: Program to use as a policy loader (e.g. /sbin/tomoyo-init ).
|
|
*
|
|
* Returns 0.
|
|
*/
|
|
static int __init tomoyo_loader_setup(char *str)
|
|
{
|
|
tomoyo_loader = str;
|
|
return 0;
|
|
}
|
|
|
|
__setup("TOMOYO_loader=", tomoyo_loader_setup);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
struct path path;
|
|
if (!tomoyo_loader)
|
|
tomoyo_loader = CONFIG_SECURITY_TOMOYO_POLICY_LOADER;
|
|
if (kern_path(tomoyo_loader, LOOKUP_FOLLOW, &path)) {
|
|
printk(KERN_INFO "Not activating Mandatory Access Control "
|
|
"as %s does not exist.\n", tomoyo_loader);
|
|
return false;
|
|
}
|
|
path_put(&path);
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Path to the trigger. (default = CONFIG_SECURITY_TOMOYO_ACTIVATION_TRIGGER)
|
|
*/
|
|
static const char *tomoyo_trigger;
|
|
|
|
/**
|
|
* tomoyo_trigger_setup - Set trigger for activation.
|
|
*
|
|
* @str: Program to use as an activation trigger (e.g. /sbin/init ).
|
|
*
|
|
* Returns 0.
|
|
*/
|
|
static int __init tomoyo_trigger_setup(char *str)
|
|
{
|
|
tomoyo_trigger = str;
|
|
return 0;
|
|
}
|
|
|
|
__setup("TOMOYO_trigger=", tomoyo_trigger_setup);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
static bool done;
|
|
char *argv[2];
|
|
char *envp[3];
|
|
|
|
if (tomoyo_policy_loaded || done)
|
|
return;
|
|
if (!tomoyo_trigger)
|
|
tomoyo_trigger = CONFIG_SECURITY_TOMOYO_ACTIVATION_TRIGGER;
|
|
if (strcmp(filename, tomoyo_trigger))
|
|
return;
|
|
if (!tomoyo_policy_loader_exists())
|
|
return;
|
|
done = true;
|
|
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, UMH_WAIT_PROC);
|
|
tomoyo_check_profile();
|
|
}
|
|
|
|
#endif
|