1 /* SPDX-License-Identifier: GPL-2.0-or-later * 1
2 /* audit -- definition of audit_context struct
3 *
4 * Copyright 2003-2004 Red Hat, Inc.
5 * Copyright 2005 Hewlett-Packard Development
6 * Copyright 2005 IBM Corporation
7 */
8
9 #ifndef _KERNEL_AUDIT_H_
10 #define _KERNEL_AUDIT_H_
11
12 #include <linux/fs.h>
13 #include <linux/audit.h>
14 #include <linux/skbuff.h>
15 #include <uapi/linux/mqueue.h>
16 #include <linux/tty.h>
17 #include <uapi/linux/openat2.h> // struct open
18
19 /* AUDIT_NAMES is the number of slots we reser
20 * for saving names from getname(). If we get
21 * a name dynamically and also add those to th
22 #define AUDIT_NAMES 5
23
24 /* At task start time, the audit_state is set
25 a per-task filter. At syscall entry, the a
26 the syscall filter. */
27 enum audit_state {
28 AUDIT_STATE_DISABLED, /* Do not crea
29 * No syscall-
30 * be generate
31 AUDIT_STATE_BUILD, /* Create the
32 * and fill it
33 * entry time.
34 * syscall rec
35 * other part
36 * should be r
37 AUDIT_STATE_RECORD /* Create the
38 * always fill
39 * time, and a
40 * record at s
41 };
42
43 /* Rule lists */
44 struct audit_watch;
45 struct audit_fsnotify_mark;
46 struct audit_tree;
47 struct audit_chunk;
48
49 struct audit_entry {
50 struct list_head list;
51 struct rcu_head rcu;
52 struct audit_krule rule;
53 };
54
55 struct audit_cap_data {
56 kernel_cap_t permitted;
57 kernel_cap_t inheritable;
58 union {
59 unsigned int fE;
60 kernel_cap_t effective;
61 };
62 kernel_cap_t ambient;
63 kuid_t rootid;
64 };
65
66 /* When fs/namei.c:getname() is called, we sto
67 * the refcnt in the associated filename struc
68 *
69 * Further, in fs/namei.c:path_lookup() we sto
70 */
71 struct audit_names {
72 struct list_head list;
73
74 struct filename *name;
75 int name_len;
76 bool hidden;
77
78 unsigned long ino;
79 dev_t dev;
80 umode_t mode;
81 kuid_t uid;
82 kgid_t gid;
83 dev_t rdev;
84 u32 osid;
85 struct audit_cap_data fcap;
86 unsigned int fcap_ver;
87 unsigned char type;
88 /*
89 * This was an allocated audit_names a
90 * names allocated in the task audit c
91 * should be freed on syscall exit.
92 */
93 bool should_free;
94 };
95
96 struct audit_proctitle {
97 int len; /* length of the cmdli
98 char *value; /* the cmdline field *
99 };
100
101 /* The per-task audit context. */
102 struct audit_context {
103 int dummy; /* mus
104 enum {
105 AUDIT_CTX_UNUSED, /* aud
106 AUDIT_CTX_SYSCALL, /* in
107 AUDIT_CTX_URING, /* in
108 } context;
109 enum audit_state state, current_sta
110 unsigned int serial; /* ser
111 int major; /* sys
112 int uring_op; /* uri
113 struct timespec64 ctime; /* tim
114 unsigned long argv[4]; /* sys
115 long return_code;/* sys
116 u64 prio;
117 int return_valid; /* r
118 /*
119 * The names_list is the list of all a
120 * syscall. The first AUDIT_NAMES ent
121 * actually be from the preallocated_n
122 * reasons. Except during allocation
123 * through the preallocated_names arra
124 * by running the names_list.
125 */
126 struct audit_names preallocated_names
127 int name_count; /* tot
128 struct list_head names_list; /* str
129 char *filterkey; /* key
130 struct path pwd;
131 struct audit_aux_data *aux;
132 struct audit_aux_data *aux_pids;
133 struct sockaddr_storage *sockaddr;
134 size_t sockaddr_len;
135 /* Save things
136 pid_t ppid;
137 kuid_t uid, euid, suid, f
138 kgid_t gid, egid, sgid, f
139 unsigned long personality;
140 int arch;
141
142 pid_t target_pid;
143 kuid_t target_auid;
144 kuid_t target_uid;
145 unsigned int target_sessionid;
146 u32 target_sid;
147 char target_comm[TASK_C
148
149 struct audit_tree_refs *trees, *first_
150 struct list_head killed_trees;
151 int tree_count;
152
153 int type;
154 union {
155 struct {
156 int nargs;
157 long args[6];
158 } socketcall;
159 struct {
160 kuid_t
161 kgid_t
162 umode_t
163 u32
164 int
165 uid_t
166 gid_t
167 umode_t
168 unsigned long
169 } ipc;
170 struct {
171 mqd_t
172 struct mq_attr
173 } mq_getsetattr;
174 struct {
175 mqd_t
176 int
177 } mq_notify;
178 struct {
179 mqd_t
180 size_t
181 unsigned int
182 struct timespec64
183 } mq_sendrecv;
184 struct {
185 int
186 umode_t
187 struct mq_attr
188 } mq_open;
189 struct {
190 pid_t
191 struct audit_cap_data
192 } capset;
193 struct {
194 int
195 int
196 } mmap;
197 struct open_how openat2;
198 struct {
199 int
200 } execve;
201 struct {
202 char
203 } module;
204 struct {
205 struct audit_ntp_data
206 struct timespec64
207 } time;
208 };
209 int fds[2];
210 struct audit_proctitle proctitle;
211 };
212
213 extern bool audit_ever_enabled;
214
215 extern void audit_log_session_info(struct audi
216
217 extern int auditd_test_task(struct task_struct
218
219 #define AUDIT_INODE_BUCKETS 32
220 extern struct list_head audit_inode_hash[AUDIT
221
222 static inline int audit_hash_ino(u32 ino)
223 {
224 return (ino & (AUDIT_INODE_BUCKETS-1))
225 }
226
227 /* Indicates that audit should log the full pa
228 #define AUDIT_NAME_FULL -1
229
230 extern int audit_match_class(int class, unsign
231 extern int audit_comparator(const u32 left, co
232 extern int audit_uid_comparator(kuid_t left, u
233 extern int audit_gid_comparator(kgid_t left, u
234 extern int parent_len(const char *path);
235 extern int audit_compare_dname_path(const stru
236 extern struct sk_buff *audit_make_reply(int se
237 const
238 extern void audit_panic(const
239
240 struct audit_netlink_list {
241 __u32 portid;
242 struct net *net;
243 struct sk_buff_head q;
244 };
245
246 int audit_send_list_thread(void *_dest);
247
248 extern struct mutex audit_filter_mutex;
249 extern int audit_del_rule(struct audit_entry *
250 extern void audit_free_rule_rcu(struct rcu_hea
251 extern struct list_head audit_filter_list[];
252
253 extern struct audit_entry *audit_dupe_rule(str
254
255 extern void audit_log_d_path_exe(struct audit_
256 struct mm_str
257
258 extern struct tty_struct *audit_get_tty(void);
259 extern void audit_put_tty(struct tty_struct *t
260
261 /* audit watch/mark/tree functions */
262 extern unsigned int audit_serial(void);
263 #ifdef CONFIG_AUDITSYSCALL
264 extern int auditsc_get_stamp(struct audit_cont
265 struct timespec6
266
267 extern void audit_put_watch(struct audit_watch
268 extern void audit_get_watch(struct audit_watch
269 extern int audit_to_watch(struct audit_krule *
270 u32 op);
271 extern int audit_add_watch(struct audit_krule
272 extern void audit_remove_watch_rule(struct aud
273 extern char *audit_watch_path(struct audit_wat
274 extern int audit_watch_compare(struct audit_wa
275 dev_t dev);
276
277 extern struct audit_fsnotify_mark *audit_alloc
278
279 extern char *audit_mark_path(struct audit_fsno
280 extern void audit_remove_mark(struct audit_fsn
281 extern void audit_remove_mark_rule(struct audi
282 extern int audit_mark_compare(struct audit_fsn
283 unsigned long in
284 extern int audit_dupe_exe(struct audit_krule *
285 extern int audit_exe_compare(struct task_struc
286 struct audit_fsno
287
288 extern struct audit_chunk *audit_tree_lookup(c
289 extern void audit_put_chunk(struct audit_chunk
290 extern bool audit_tree_match(struct audit_chun
291 struct audit_tree
292 extern int audit_make_tree(struct audit_krule
293 extern int audit_add_tree_rule(struct audit_kr
294 extern int audit_remove_tree_rule(struct audit
295 extern void audit_trim_trees(void);
296 extern int audit_tag_tree(char *old, char *new
297 extern const char *audit_tree_path(struct audi
298 extern void audit_put_tree(struct audit_tree *
299 extern void audit_kill_trees(struct audit_cont
300
301 extern int audit_signal_info_syscall(struct ta
302 extern void audit_filter_inodes(struct task_st
303 struct audit_c
304 extern struct list_head *audit_killed_trees(vo
305 #else /* CONFIG_AUDITSYSCALL */
306 #define auditsc_get_stamp(c, t, s) 0
307 #define audit_put_watch(w) do { } while (0)
308 #define audit_get_watch(w) do { } while (0)
309 #define audit_to_watch(k, p, l, o) (-EINVAL)
310 #define audit_add_watch(k, l) (-EINVAL)
311 #define audit_remove_watch_rule(k) BUG()
312 #define audit_watch_path(w) ""
313 #define audit_watch_compare(w, i, d) 0
314
315 #define audit_alloc_mark(k, p, l) (ERR_PTR(-EI
316 #define audit_mark_path(m) ""
317 #define audit_remove_mark(m) do { } while (0)
318 #define audit_remove_mark_rule(k) do { } while
319 #define audit_mark_compare(m, i, d) 0
320 #define audit_exe_compare(t, m) (-EINVAL)
321 #define audit_dupe_exe(n, o) (-EINVAL)
322
323 #define audit_remove_tree_rule(rule) BUG()
324 #define audit_add_tree_rule(rule) -EINVAL
325 #define audit_make_tree(rule, str, op) -EINVAL
326 #define audit_trim_trees() do { } while (0)
327 #define audit_put_tree(tree) do { } while (0)
328 #define audit_tag_tree(old, new) -EINVAL
329 #define audit_tree_path(rule) "" /* nev
330 #define audit_kill_trees(context) BUG()
331
332 static inline int audit_signal_info_syscall(st
333 {
334 return 0;
335 }
336
337 #define audit_filter_inodes(t, c) do { } while
338 #endif /* CONFIG_AUDITSYSCALL */
339
340 extern char *audit_unpack_string(void **bufp,
341
342 extern int audit_filter(int msgtype, unsigned
343
344 extern void audit_ctl_lock(void);
345 extern void audit_ctl_unlock(void);
346
347 #endif
348
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