1 // SPDX-License-Identifier: GPL-2.0 <<
2 /* 1 /*
3 * security/tomoyo/load_policy.c 2 * security/tomoyo/load_policy.c
4 * 3 *
5 * Copyright (C) 2005-2011 NTT DATA CORPORATI 4 * Copyright (C) 2005-2011 NTT DATA CORPORATION
6 */ 5 */
7 6
8 #include "common.h" 7 #include "common.h"
9 8
10 #ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_ 9 #ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
11 10
12 /* 11 /*
13 * Path to the policy loader. (default = CONFI 12 * Path to the policy loader. (default = CONFIG_SECURITY_TOMOYO_POLICY_LOADER)
14 */ 13 */
15 static const char *tomoyo_loader; 14 static const char *tomoyo_loader;
16 15
17 /** 16 /**
18 * tomoyo_loader_setup - Set policy loader. 17 * tomoyo_loader_setup - Set policy loader.
19 * 18 *
20 * @str: Program to use as a policy loader (e. 19 * @str: Program to use as a policy loader (e.g. /sbin/tomoyo-init ).
21 * 20 *
22 * Returns 0. 21 * Returns 0.
23 */ 22 */
24 static int __init tomoyo_loader_setup(char *st 23 static int __init tomoyo_loader_setup(char *str)
25 { 24 {
26 tomoyo_loader = str; 25 tomoyo_loader = str;
27 return 1; !! 26 return 0;
28 } 27 }
29 28
30 __setup("TOMOYO_loader=", tomoyo_loader_setup) 29 __setup("TOMOYO_loader=", tomoyo_loader_setup);
31 30
32 /** 31 /**
33 * tomoyo_policy_loader_exists - Check whether 32 * tomoyo_policy_loader_exists - Check whether /sbin/tomoyo-init exists.
34 * 33 *
35 * Returns true if /sbin/tomoyo-init exists, f 34 * Returns true if /sbin/tomoyo-init exists, false otherwise.
36 */ 35 */
37 static bool tomoyo_policy_loader_exists(void) 36 static bool tomoyo_policy_loader_exists(void)
38 { 37 {
39 struct path path; 38 struct path path;
40 <<
41 if (!tomoyo_loader) 39 if (!tomoyo_loader)
42 tomoyo_loader = CONFIG_SECURIT 40 tomoyo_loader = CONFIG_SECURITY_TOMOYO_POLICY_LOADER;
43 if (kern_path(tomoyo_loader, LOOKUP_FO 41 if (kern_path(tomoyo_loader, LOOKUP_FOLLOW, &path)) {
44 pr_info("Not activating Mandat !! 42 printk(KERN_INFO "Not activating Mandatory Access Control "
45 tomoyo_loader); !! 43 "as %s does not exist.\n", tomoyo_loader);
46 return false; 44 return false;
47 } 45 }
48 path_put(&path); 46 path_put(&path);
49 return true; 47 return true;
50 } 48 }
51 49
52 /* 50 /*
53 * Path to the trigger. (default = CONFIG_SECU 51 * Path to the trigger. (default = CONFIG_SECURITY_TOMOYO_ACTIVATION_TRIGGER)
54 */ 52 */
55 static const char *tomoyo_trigger; 53 static const char *tomoyo_trigger;
56 54
57 /** 55 /**
58 * tomoyo_trigger_setup - Set trigger for acti 56 * tomoyo_trigger_setup - Set trigger for activation.
59 * 57 *
60 * @str: Program to use as an activation trigg 58 * @str: Program to use as an activation trigger (e.g. /sbin/init ).
61 * 59 *
62 * Returns 0. 60 * Returns 0.
63 */ 61 */
64 static int __init tomoyo_trigger_setup(char *s 62 static int __init tomoyo_trigger_setup(char *str)
65 { 63 {
66 tomoyo_trigger = str; 64 tomoyo_trigger = str;
67 return 1; !! 65 return 0;
68 } 66 }
69 67
70 __setup("TOMOYO_trigger=", tomoyo_trigger_setu 68 __setup("TOMOYO_trigger=", tomoyo_trigger_setup);
71 69
72 /** 70 /**
73 * tomoyo_load_policy - Run external policy lo 71 * tomoyo_load_policy - Run external policy loader to load policy.
74 * 72 *
75 * @filename: The program about to start. 73 * @filename: The program about to start.
76 * 74 *
77 * This function checks whether @filename is / 75 * This function checks whether @filename is /sbin/init , and if so
78 * invoke /sbin/tomoyo-init and wait for the t 76 * invoke /sbin/tomoyo-init and wait for the termination of /sbin/tomoyo-init
79 * and then continues invocation of /sbin/init 77 * and then continues invocation of /sbin/init.
80 * /sbin/tomoyo-init reads policy files in /et 78 * /sbin/tomoyo-init reads policy files in /etc/tomoyo/ directory and
81 * writes to /sys/kernel/security/tomoyo/ inte 79 * writes to /sys/kernel/security/tomoyo/ interfaces.
82 * 80 *
83 * Returns nothing. 81 * Returns nothing.
84 */ 82 */
85 void tomoyo_load_policy(const char *filename) 83 void tomoyo_load_policy(const char *filename)
86 { 84 {
87 static bool done; 85 static bool done;
88 char *argv[2]; 86 char *argv[2];
89 char *envp[3]; 87 char *envp[3];
90 88
91 if (tomoyo_policy_loaded || done) 89 if (tomoyo_policy_loaded || done)
92 return; 90 return;
93 if (!tomoyo_trigger) 91 if (!tomoyo_trigger)
94 tomoyo_trigger = CONFIG_SECURI 92 tomoyo_trigger = CONFIG_SECURITY_TOMOYO_ACTIVATION_TRIGGER;
95 if (strcmp(filename, tomoyo_trigger)) 93 if (strcmp(filename, tomoyo_trigger))
96 return; 94 return;
97 if (!tomoyo_policy_loader_exists()) 95 if (!tomoyo_policy_loader_exists())
98 return; 96 return;
99 done = true; 97 done = true;
100 pr_info("Calling %s to load policy. Pl !! 98 printk(KERN_INFO "Calling %s to load policy. Please wait.\n",
>> 99 tomoyo_loader);
101 argv[0] = (char *) tomoyo_loader; 100 argv[0] = (char *) tomoyo_loader;
102 argv[1] = NULL; 101 argv[1] = NULL;
103 envp[0] = "HOME=/"; 102 envp[0] = "HOME=/";
104 envp[1] = "PATH=/sbin:/bin:/usr/sbin:/ 103 envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
105 envp[2] = NULL; 104 envp[2] = NULL;
106 call_usermodehelper(argv[0], argv, env 105 call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
107 tomoyo_check_profile(); 106 tomoyo_check_profile();
108 } 107 }
109 108
110 #endif 109 #endif
111 110
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TOMOYO® is a registered trademark of NTT DATA CORPORATION.