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1/*
2 * AppArmor security module
3 *
4 * This file contains AppArmor auditing functions
5 *
6 * Copyright (C) 1998-2008 Novell/SUSE
7 * Copyright 2009-2010 Canonical Ltd.
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation, version 2 of the
12 * License.
13 */
14
15#include <linux/audit.h>
16#include <linux/socket.h>
17
18#include "include/apparmor.h"
19#include "include/audit.h"
20#include "include/policy.h"
21
22const char *const op_table[] = {
23 "null",
24
25 "sysctl",
26 "capable",
27
28 "unlink",
29 "mkdir",
30 "rmdir",
31 "mknod",
32 "truncate",
33 "link",
34 "symlink",
35 "rename_src",
36 "rename_dest",
37 "chmod",
38 "chown",
39 "getattr",
40 "open",
41
42 "file_perm",
43 "file_lock",
44 "file_mmap",
45 "file_mprotect",
46
47 "create",
48 "post_create",
49 "bind",
50 "connect",
51 "listen",
52 "accept",
53 "sendmsg",
54 "recvmsg",
55 "getsockname",
56 "getpeername",
57 "getsockopt",
58 "setsockopt",
59 "socket_shutdown",
60
61 "ptrace",
62
63 "exec",
64 "change_hat",
65 "change_profile",
66 "change_onexec",
67
68 "setprocattr",
69 "setrlimit",
70
71 "profile_replace",
72 "profile_load",
73 "profile_remove"
74};
75
76const char *const audit_mode_names[] = {
77 "normal",
78 "quiet_denied",
79 "quiet",
80 "noquiet",
81 "all"
82};
83
84static const char *const aa_audit_type[] = {
85 "AUDIT",
86 "ALLOWED",
87 "DENIED",
88 "HINT",
89 "STATUS",
90 "ERROR",
91 "KILLED"
92 "AUTO"
93};
94
95/*
96 * Currently AppArmor auditing is fed straight into the audit framework.
97 *
98 * TODO:
99 * netlink interface for complain mode
100 * user auditing, - send user auditing to netlink interface
101 * system control of whether user audit messages go to system log
102 */
103
104/**
105 * audit_base - core AppArmor function.
106 * @ab: audit buffer to fill (NOT NULL)
107 * @ca: audit structure containing data to audit (NOT NULL)
108 *
109 * Record common AppArmor audit data from @sa
110 */
111static void audit_pre(struct audit_buffer *ab, void *ca)
112{
113 struct common_audit_data *sa = ca;
114 struct task_struct *tsk = sa->aad->tsk ? sa->aad->tsk : current;
115
116 if (aa_g_audit_header) {
117 audit_log_format(ab, "apparmor=");
118 audit_log_string(ab, aa_audit_type[sa->aad->type]);
119 }
120
121 if (sa->aad->op) {
122 audit_log_format(ab, " operation=");
123 audit_log_string(ab, op_table[sa->aad->op]);
124 }
125
126 if (sa->aad->info) {
127 audit_log_format(ab, " info=");
128 audit_log_string(ab, sa->aad->info);
129 if (sa->aad->error)
130 audit_log_format(ab, " error=%d", sa->aad->error);
131 }
132
133 if (sa->aad->profile) {
134 struct aa_profile *profile = sa->aad->profile;
135 pid_t pid;
136 rcu_read_lock();
137 pid = rcu_dereference(tsk->real_parent)->pid;
138 rcu_read_unlock();
139 audit_log_format(ab, " parent=%d", pid);
140 if (profile->ns != root_ns) {
141 audit_log_format(ab, " namespace=");
142 audit_log_untrustedstring(ab, profile->ns->base.hname);
143 }
144 audit_log_format(ab, " profile=");
145 audit_log_untrustedstring(ab, profile->base.hname);
146 }
147
148 if (sa->aad->name) {
149 audit_log_format(ab, " name=");
150 audit_log_untrustedstring(ab, sa->aad->name);
151 }
152
153 if (sa->aad->tsk) {
154 audit_log_format(ab, " pid=%d comm=", tsk->pid);
155 audit_log_untrustedstring(ab, tsk->comm);
156 }
157
158}
159
160/**
161 * aa_audit_msg - Log a message to the audit subsystem
162 * @sa: audit event structure (NOT NULL)
163 * @cb: optional callback fn for type specific fields (MAYBE NULL)
164 */
165void aa_audit_msg(int type, struct common_audit_data *sa,
166 void (*cb) (struct audit_buffer *, void *))
167{
168 sa->aad->type = type;
169 common_lsm_audit(sa, audit_pre, cb);
170}
171
172/**
173 * aa_audit - Log a profile based audit event to the audit subsystem
174 * @type: audit type for the message
175 * @profile: profile to check against (NOT NULL)
176 * @gfp: allocation flags to use
177 * @sa: audit event (NOT NULL)
178 * @cb: optional callback fn for type specific fields (MAYBE NULL)
179 *
180 * Handle default message switching based off of audit mode flags
181 *
182 * Returns: error on failure
183 */
184int aa_audit(int type, struct aa_profile *profile, gfp_t gfp,
185 struct common_audit_data *sa,
186 void (*cb) (struct audit_buffer *, void *))
187{
188 BUG_ON(!profile);
189
190 if (type == AUDIT_APPARMOR_AUTO) {
191 if (likely(!sa->aad->error)) {
192 if (AUDIT_MODE(profile) != AUDIT_ALL)
193 return 0;
194 type = AUDIT_APPARMOR_AUDIT;
195 } else if (COMPLAIN_MODE(profile))
196 type = AUDIT_APPARMOR_ALLOWED;
197 else
198 type = AUDIT_APPARMOR_DENIED;
199 }
200 if (AUDIT_MODE(profile) == AUDIT_QUIET ||
201 (type == AUDIT_APPARMOR_DENIED &&
202 AUDIT_MODE(profile) == AUDIT_QUIET))
203 return sa->aad->error;
204
205 if (KILL_MODE(profile) && type == AUDIT_APPARMOR_DENIED)
206 type = AUDIT_APPARMOR_KILL;
207
208 if (!unconfined(profile))
209 sa->aad->profile = profile;
210
211 aa_audit_msg(type, sa, cb);
212
213 if (sa->aad->type == AUDIT_APPARMOR_KILL)
214 (void)send_sig_info(SIGKILL, NULL,
215 sa->aad->tsk ? sa->aad->tsk : current);
216
217 if (sa->aad->type == AUDIT_APPARMOR_ALLOWED)
218 return complain_error(sa->aad->error);
219
220 return sa->aad->error;
221}
1/*
2 * AppArmor security module
3 *
4 * This file contains AppArmor auditing functions
5 *
6 * Copyright (C) 1998-2008 Novell/SUSE
7 * Copyright 2009-2010 Canonical Ltd.
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation, version 2 of the
12 * License.
13 */
14
15#include <linux/audit.h>
16#include <linux/socket.h>
17
18#include "include/apparmor.h"
19#include "include/audit.h"
20#include "include/policy.h"
21
22const char *const op_table[] = {
23 "null",
24
25 "sysctl",
26 "capable",
27
28 "unlink",
29 "mkdir",
30 "rmdir",
31 "mknod",
32 "truncate",
33 "link",
34 "symlink",
35 "rename_src",
36 "rename_dest",
37 "chmod",
38 "chown",
39 "getattr",
40 "open",
41
42 "file_perm",
43 "file_lock",
44 "file_mmap",
45 "file_mprotect",
46
47 "create",
48 "post_create",
49 "bind",
50 "connect",
51 "listen",
52 "accept",
53 "sendmsg",
54 "recvmsg",
55 "getsockname",
56 "getpeername",
57 "getsockopt",
58 "setsockopt",
59 "socket_shutdown",
60
61 "ptrace",
62
63 "exec",
64 "change_hat",
65 "change_profile",
66 "change_onexec",
67
68 "setprocattr",
69 "setrlimit",
70
71 "profile_replace",
72 "profile_load",
73 "profile_remove"
74};
75
76const char *const audit_mode_names[] = {
77 "normal",
78 "quiet_denied",
79 "quiet",
80 "noquiet",
81 "all"
82};
83
84static const char *const aa_audit_type[] = {
85 "AUDIT",
86 "ALLOWED",
87 "DENIED",
88 "HINT",
89 "STATUS",
90 "ERROR",
91 "KILLED",
92 "AUTO"
93};
94
95/*
96 * Currently AppArmor auditing is fed straight into the audit framework.
97 *
98 * TODO:
99 * netlink interface for complain mode
100 * user auditing, - send user auditing to netlink interface
101 * system control of whether user audit messages go to system log
102 */
103
104/**
105 * audit_base - core AppArmor function.
106 * @ab: audit buffer to fill (NOT NULL)
107 * @ca: audit structure containing data to audit (NOT NULL)
108 *
109 * Record common AppArmor audit data from @sa
110 */
111static void audit_pre(struct audit_buffer *ab, void *ca)
112{
113 struct common_audit_data *sa = ca;
114
115 if (aa_g_audit_header) {
116 audit_log_format(ab, "apparmor=");
117 audit_log_string(ab, aa_audit_type[sa->aad->type]);
118 }
119
120 if (sa->aad->op) {
121 audit_log_format(ab, " operation=");
122 audit_log_string(ab, op_table[sa->aad->op]);
123 }
124
125 if (sa->aad->info) {
126 audit_log_format(ab, " info=");
127 audit_log_string(ab, sa->aad->info);
128 if (sa->aad->error)
129 audit_log_format(ab, " error=%d", sa->aad->error);
130 }
131
132 if (sa->aad->profile) {
133 struct aa_profile *profile = sa->aad->profile;
134 if (profile->ns != root_ns) {
135 audit_log_format(ab, " namespace=");
136 audit_log_untrustedstring(ab, profile->ns->base.hname);
137 }
138 audit_log_format(ab, " profile=");
139 audit_log_untrustedstring(ab, profile->base.hname);
140 }
141
142 if (sa->aad->name) {
143 audit_log_format(ab, " name=");
144 audit_log_untrustedstring(ab, sa->aad->name);
145 }
146}
147
148/**
149 * aa_audit_msg - Log a message to the audit subsystem
150 * @sa: audit event structure (NOT NULL)
151 * @cb: optional callback fn for type specific fields (MAYBE NULL)
152 */
153void aa_audit_msg(int type, struct common_audit_data *sa,
154 void (*cb) (struct audit_buffer *, void *))
155{
156 sa->aad->type = type;
157 common_lsm_audit(sa, audit_pre, cb);
158}
159
160/**
161 * aa_audit - Log a profile based audit event to the audit subsystem
162 * @type: audit type for the message
163 * @profile: profile to check against (NOT NULL)
164 * @gfp: allocation flags to use
165 * @sa: audit event (NOT NULL)
166 * @cb: optional callback fn for type specific fields (MAYBE NULL)
167 *
168 * Handle default message switching based off of audit mode flags
169 *
170 * Returns: error on failure
171 */
172int aa_audit(int type, struct aa_profile *profile, gfp_t gfp,
173 struct common_audit_data *sa,
174 void (*cb) (struct audit_buffer *, void *))
175{
176 BUG_ON(!profile);
177
178 if (type == AUDIT_APPARMOR_AUTO) {
179 if (likely(!sa->aad->error)) {
180 if (AUDIT_MODE(profile) != AUDIT_ALL)
181 return 0;
182 type = AUDIT_APPARMOR_AUDIT;
183 } else if (COMPLAIN_MODE(profile))
184 type = AUDIT_APPARMOR_ALLOWED;
185 else
186 type = AUDIT_APPARMOR_DENIED;
187 }
188 if (AUDIT_MODE(profile) == AUDIT_QUIET ||
189 (type == AUDIT_APPARMOR_DENIED &&
190 AUDIT_MODE(profile) == AUDIT_QUIET))
191 return sa->aad->error;
192
193 if (KILL_MODE(profile) && type == AUDIT_APPARMOR_DENIED)
194 type = AUDIT_APPARMOR_KILL;
195
196 if (!unconfined(profile))
197 sa->aad->profile = profile;
198
199 aa_audit_msg(type, sa, cb);
200
201 if (sa->aad->type == AUDIT_APPARMOR_KILL)
202 (void)send_sig_info(SIGKILL, NULL,
203 sa->type == LSM_AUDIT_DATA_TASK && sa->u.tsk ?
204 sa->u.tsk : current);
205
206 if (sa->aad->type == AUDIT_APPARMOR_ALLOWED)
207 return complain_error(sa->aad->error);
208
209 return sa->aad->error;
210}