cregit-Linux how code gets into the kernel

Release 4.10 security/tomoyo/load_policy.c

Directory: security/tomoyo
/*
 * 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; }

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tetsuo handatetsuo handa18100.00%1100.00%
Total18100.00%1100.00%

__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; }

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tetsuo handatetsuo handa56100.00%2100.00%
Total56100.00%2100.00%

/* * 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; }

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tetsuo handatetsuo handa18100.00%1100.00%
Total18100.00%1100.00%

__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(); }

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tetsuo handatetsuo handa12899.22%266.67%
oleg nesterovoleg nesterov10.78%133.33%
Total129100.00%3100.00%

#endif

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tetsuo handatetsuo handa26199.62%375.00%
oleg nesterovoleg nesterov10.38%125.00%
Total262100.00%4100.00%
Directory: security/tomoyo
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