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-rw-r--r--include/linux/lsm_audit.h27
-rw-r--r--security/apparmor/audit.c215
-rw-r--r--security/apparmor/include/audit.h123
3 files changed, 365 insertions, 0 deletions
diff --git a/include/linux/lsm_audit.h b/include/linux/lsm_audit.h
index 788f0ab937aa..112a55033352 100644
--- a/include/linux/lsm_audit.h
+++ b/include/linux/lsm_audit.h
@@ -99,6 +99,33 @@ struct common_audit_data {
99 int result; 99 int result;
100 } selinux_audit_data; 100 } selinux_audit_data;
101#endif 101#endif
102#ifdef CONFIG_SECURITY_APPARMOR
103 struct {
104 int error;
105 int op;
106 int type;
107 void *profile;
108 const char *name;
109 const char *info;
110 union {
111 void *target;
112 struct {
113 long pos;
114 void *target;
115 } iface;
116 struct {
117 int rlim;
118 unsigned long max;
119 } rlim;
120 struct {
121 const char *target;
122 u32 request;
123 u32 denied;
124 uid_t ouid;
125 } fs;
126 };
127 } apparmor_audit_data;
128#endif
102 }; 129 };
103 /* these callback will be implemented by a specific LSM */ 130 /* these callback will be implemented by a specific LSM */
104 void (*lsm_pre_audit)(struct audit_buffer *, void *); 131 void (*lsm_pre_audit)(struct audit_buffer *, void *);
diff --git a/security/apparmor/audit.c b/security/apparmor/audit.c
new file mode 100644
index 000000000000..96502b22b268
--- /dev/null
+++ b/security/apparmor/audit.c
@@ -0,0 +1,215 @@
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 *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 *audit_mode_names[] = {
77 "normal",
78 "quiet_denied",
79 "quiet",
80 "noquiet",
81 "all"
82};
83
84static char *aa_audit_type[] = {
85 "AUDIT",
86 "ALLOWED",
87 "DENIED",
88 "HINT",
89 "STATUS",
90 "ERROR",
91 "KILLED"
92};
93
94/*
95 * Currently AppArmor auditing is fed straight into the audit framework.
96 *
97 * TODO:
98 * netlink interface for complain mode
99 * user auditing, - send user auditing to netlink interface
100 * system control of whether user audit messages go to system log
101 */
102
103/**
104 * audit_base - core AppArmor function.
105 * @ab: audit buffer to fill (NOT NULL)
106 * @ca: audit structure containing data to audit (NOT NULL)
107 *
108 * Record common AppArmor audit data from @sa
109 */
110static void audit_pre(struct audit_buffer *ab, void *ca)
111{
112 struct common_audit_data *sa = ca;
113 struct task_struct *tsk = sa->tsk ? sa->tsk : current;
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 pid_t pid;
135 rcu_read_lock();
136 pid = tsk->real_parent->pid;
137 rcu_read_unlock();
138 audit_log_format(ab, " parent=%d", pid);
139 if (profile->ns != root_ns) {
140 audit_log_format(ab, " namespace=");
141 audit_log_untrustedstring(ab, profile->ns->base.hname);
142 }
143 audit_log_format(ab, " profile=");
144 audit_log_untrustedstring(ab, profile->base.hname);
145 }
146
147 if (sa->aad.name) {
148 audit_log_format(ab, " name=");
149 audit_log_untrustedstring(ab, sa->aad.name);
150 }
151}
152
153/**
154 * aa_audit_msg - Log a message to the audit subsystem
155 * @sa: audit event structure (NOT NULL)
156 * @cb: optional callback fn for type specific fields (MAYBE NULL)
157 */
158void aa_audit_msg(int type, struct common_audit_data *sa,
159 void (*cb) (struct audit_buffer *, void *))
160{
161 sa->aad.type = type;
162 sa->lsm_pre_audit = audit_pre;
163 sa->lsm_post_audit = cb;
164 common_lsm_audit(sa);
165}
166
167/**
168 * aa_audit - Log a profile based audit event to the audit subsystem
169 * @type: audit type for the message
170 * @profile: profile to check against (NOT NULL)
171 * @gfp: allocation flags to use
172 * @sa: audit event (NOT NULL)
173 * @cb: optional callback fn for type specific fields (MAYBE NULL)
174 *
175 * Handle default message switching based off of audit mode flags
176 *
177 * Returns: error on failure
178 */
179int aa_audit(int type, struct aa_profile *profile, gfp_t gfp,
180 struct common_audit_data *sa,
181 void (*cb) (struct audit_buffer *, void *))
182{
183 BUG_ON(!profile);
184
185 if (type == AUDIT_APPARMOR_AUTO) {
186 if (likely(!sa->aad.error)) {
187 if (AUDIT_MODE(profile) != AUDIT_ALL)
188 return 0;
189 type = AUDIT_APPARMOR_AUDIT;
190 } else if (COMPLAIN_MODE(profile))
191 type = AUDIT_APPARMOR_ALLOWED;
192 else
193 type = AUDIT_APPARMOR_DENIED;
194 }
195 if (AUDIT_MODE(profile) == AUDIT_QUIET ||
196 (type == AUDIT_APPARMOR_DENIED &&
197 AUDIT_MODE(profile) == AUDIT_QUIET))
198 return sa->aad.error;
199
200 if (KILL_MODE(profile) && type == AUDIT_APPARMOR_DENIED)
201 type = AUDIT_APPARMOR_KILL;
202
203 if (!unconfined(profile))
204 sa->aad.profile = profile;
205
206 aa_audit_msg(type, sa, cb);
207
208 if (sa->aad.type == AUDIT_APPARMOR_KILL)
209 (void)send_sig_info(SIGKILL, NULL, sa->tsk ? sa->tsk : current);
210
211 if (sa->aad.type == AUDIT_APPARMOR_ALLOWED)
212 return complain_error(sa->aad.error);
213
214 return sa->aad.error;
215}
diff --git a/security/apparmor/include/audit.h b/security/apparmor/include/audit.h
new file mode 100644
index 000000000000..1951786d32e9
--- /dev/null
+++ b/security/apparmor/include/audit.h
@@ -0,0 +1,123 @@
1/*
2 * AppArmor security module
3 *
4 * This file contains AppArmor auditing function definitions.
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#ifndef __AA_AUDIT_H
16#define __AA_AUDIT_H
17
18#include <linux/audit.h>
19#include <linux/fs.h>
20#include <linux/lsm_audit.h>
21#include <linux/sched.h>
22#include <linux/slab.h>
23
24#include "file.h"
25
26struct aa_profile;
27
28extern const char *audit_mode_names[];
29#define AUDIT_MAX_INDEX 5
30
31#define AUDIT_APPARMOR_AUTO 0 /* auto choose audit message type */
32
33enum audit_mode {
34 AUDIT_NORMAL, /* follow normal auditing of accesses */
35 AUDIT_QUIET_DENIED, /* quiet all denied access messages */
36 AUDIT_QUIET, /* quiet all messages */
37 AUDIT_NOQUIET, /* do not quiet audit messages */
38 AUDIT_ALL /* audit all accesses */
39};
40
41enum audit_type {
42 AUDIT_APPARMOR_AUDIT,
43 AUDIT_APPARMOR_ALLOWED,
44 AUDIT_APPARMOR_DENIED,
45 AUDIT_APPARMOR_HINT,
46 AUDIT_APPARMOR_STATUS,
47 AUDIT_APPARMOR_ERROR,
48 AUDIT_APPARMOR_KILL
49};
50
51extern const char *op_table[];
52enum aa_ops {
53 OP_NULL,
54
55 OP_SYSCTL,
56 OP_CAPABLE,
57
58 OP_UNLINK,
59 OP_MKDIR,
60 OP_RMDIR,
61 OP_MKNOD,
62 OP_TRUNC,
63 OP_LINK,
64 OP_SYMLINK,
65 OP_RENAME_SRC,
66 OP_RENAME_DEST,
67 OP_CHMOD,
68 OP_CHOWN,
69 OP_GETATTR,
70 OP_OPEN,
71
72 OP_FPERM,
73 OP_FLOCK,
74 OP_FMMAP,
75 OP_FMPROT,
76
77 OP_CREATE,
78 OP_POST_CREATE,
79 OP_BIND,
80 OP_CONNECT,
81 OP_LISTEN,
82 OP_ACCEPT,
83 OP_SENDMSG,
84 OP_RECVMSG,
85 OP_GETSOCKNAME,
86 OP_GETPEERNAME,
87 OP_GETSOCKOPT,
88 OP_SETSOCKOPT,
89 OP_SOCK_SHUTDOWN,
90
91 OP_PTRACE,
92
93 OP_EXEC,
94 OP_CHANGE_HAT,
95 OP_CHANGE_PROFILE,
96 OP_CHANGE_ONEXEC,
97
98 OP_SETPROCATTR,
99 OP_SETRLIMIT,
100
101 OP_PROF_REPL,
102 OP_PROF_LOAD,
103 OP_PROF_RM,
104};
105
106
107/* define a short hand for apparmor_audit_data portion of common_audit_data */
108#define aad apparmor_audit_data
109
110void aa_audit_msg(int type, struct common_audit_data *sa,
111 void (*cb) (struct audit_buffer *, void *));
112int aa_audit(int type, struct aa_profile *profile, gfp_t gfp,
113 struct common_audit_data *sa,
114 void (*cb) (struct audit_buffer *, void *));
115
116static inline int complain_error(int error)
117{
118 if (error == -EPERM || error == -EACCES)
119 return 0;
120 return error;
121}
122
123#endif /* __AA_AUDIT_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-12 09:58:12 -0500