1 /* audit -- definition of audit_context structure and supporting types
3 * Copyright 2003-2004 Red Hat, Inc.
4 * Copyright 2005 Hewlett-Packard Development Company, L.P.
5 * Copyright 2005 IBM Corporation
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/audit.h>
24 #include <linux/skbuff.h>
25 #include <uapi/linux/mqueue.h>
26 #include <linux/tty.h>
28 /* AUDIT_NAMES is the number of slots we reserve in the audit_context
29 * for saving names from getname(). If we get more names we will allocate
30 * a name dynamically and also add those to the list anchored by names_list. */
33 /* At task start time, the audit_state is set in the audit_context using
34 a per-task filter. At syscall entry, the audit_state is augmented by
35 the syscall filter. */
37 AUDIT_DISABLED
, /* Do not create per-task audit_context.
38 * No syscall-specific audit records can
40 AUDIT_BUILD_CONTEXT
, /* Create the per-task audit_context,
41 * and fill it in at syscall
42 * entry time. This makes a full
43 * syscall record available if some
44 * other part of the kernel decides it
45 * should be recorded. */
46 AUDIT_RECORD_CONTEXT
/* Create the per-task audit_context,
47 * always fill it in at syscall entry
48 * time, and always write out the audit
49 * record at syscall exit time. */
54 struct audit_fsnotify_mark
;
59 struct list_head list
;
61 struct audit_krule rule
;
64 struct audit_cap_data
{
65 kernel_cap_t permitted
;
66 kernel_cap_t inheritable
;
68 unsigned int fE
; /* effective bit of file cap */
69 kernel_cap_t effective
; /* effective set of process */
74 /* When fs/namei.c:getname() is called, we store the pointer in name and bump
75 * the refcnt in the associated filename struct.
77 * Further, in fs/namei.c:path_lookup() we store the inode and device.
80 struct list_head list
; /* audit_context->names_list */
82 struct filename
*name
;
83 int name_len
; /* number of chars to log */
84 bool hidden
; /* don't log this record */
93 struct audit_cap_data fcap
;
94 unsigned int fcap_ver
;
95 unsigned char type
; /* record type */
97 * This was an allocated audit_names and not from the array of
98 * names allocated in the task audit context. Thus this name
99 * should be freed on syscall exit.
104 struct audit_proctitle
{
105 int len
; /* length of the cmdline field. */
106 char *value
; /* the cmdline field */
109 /* The per-task audit context. */
110 struct audit_context
{
111 int dummy
; /* must be the first element */
112 int in_syscall
; /* 1 if task is in a syscall */
113 enum audit_state state
, current_state
;
114 unsigned int serial
; /* serial number for record */
115 int major
; /* syscall number */
116 struct timespec64 ctime
; /* time of syscall entry */
117 unsigned long argv
[4]; /* syscall arguments */
118 long return_code
;/* syscall return code */
120 int return_valid
; /* return code is valid */
122 * The names_list is the list of all audit_names collected during this
123 * syscall. The first AUDIT_NAMES entries in the names_list will
124 * actually be from the preallocated_names array for performance
125 * reasons. Except during allocation they should never be referenced
126 * through the preallocated_names array and should only be found/used
127 * by running the names_list.
129 struct audit_names preallocated_names
[AUDIT_NAMES
];
130 int name_count
; /* total records in names_list */
131 struct list_head names_list
; /* struct audit_names->list anchor */
132 char *filterkey
; /* key for rule that triggered record */
134 struct audit_aux_data
*aux
;
135 struct audit_aux_data
*aux_pids
;
136 struct sockaddr_storage
*sockaddr
;
138 /* Save things to print about task_struct */
140 kuid_t uid
, euid
, suid
, fsuid
;
141 kgid_t gid
, egid
, sgid
, fsgid
;
142 unsigned long personality
;
148 unsigned int target_sessionid
;
150 char target_comm
[TASK_COMM_LEN
];
152 struct audit_tree_refs
*trees
, *first_trees
;
153 struct list_head killed_trees
;
171 unsigned long qbytes
;
175 struct mq_attr mqstat
;
184 unsigned int msg_prio
;
185 struct timespec64 abs_timeout
;
194 struct audit_cap_data cap
;
208 struct audit_proctitle proctitle
;
211 extern bool audit_ever_enabled
;
213 extern void audit_log_session_info(struct audit_buffer
*ab
);
215 extern void audit_copy_inode(struct audit_names
*name
,
216 const struct dentry
*dentry
,
217 struct inode
*inode
);
218 extern void audit_log_cap(struct audit_buffer
*ab
, char *prefix
,
220 extern void audit_log_name(struct audit_context
*context
,
221 struct audit_names
*n
, const struct path
*path
,
222 int record_num
, int *call_panic
);
224 extern int auditd_test_task(struct task_struct
*task
);
226 #define AUDIT_INODE_BUCKETS 32
227 extern struct list_head audit_inode_hash
[AUDIT_INODE_BUCKETS
];
229 static inline int audit_hash_ino(u32 ino
)
231 return (ino
& (AUDIT_INODE_BUCKETS
-1));
234 /* Indicates that audit should log the full pathname. */
235 #define AUDIT_NAME_FULL -1
237 extern int audit_match_class(int class, unsigned syscall
);
238 extern int audit_comparator(const u32 left
, const u32 op
, const u32 right
);
239 extern int audit_uid_comparator(kuid_t left
, u32 op
, kuid_t right
);
240 extern int audit_gid_comparator(kgid_t left
, u32 op
, kgid_t right
);
241 extern int parent_len(const char *path
);
242 extern int audit_compare_dname_path(const char *dname
, const char *path
, int plen
);
243 extern struct sk_buff
*audit_make_reply(int seq
, int type
, int done
, int multi
,
244 const void *payload
, int size
);
245 extern void audit_panic(const char *message
);
247 struct audit_netlink_list
{
250 struct sk_buff_head q
;
253 int audit_send_list(void *_dest
);
255 extern int selinux_audit_rule_update(void);
257 extern struct mutex audit_filter_mutex
;
258 extern int audit_del_rule(struct audit_entry
*entry
);
259 extern void audit_free_rule_rcu(struct rcu_head
*head
);
260 extern struct list_head audit_filter_list
[];
262 extern struct audit_entry
*audit_dupe_rule(struct audit_krule
*old
);
264 extern void audit_log_d_path_exe(struct audit_buffer
*ab
,
265 struct mm_struct
*mm
);
267 extern struct tty_struct
*audit_get_tty(void);
268 extern void audit_put_tty(struct tty_struct
*tty
);
270 /* audit watch functions */
271 #ifdef CONFIG_AUDITSYSCALL
272 extern void audit_put_watch(struct audit_watch
*watch
);
273 extern void audit_get_watch(struct audit_watch
*watch
);
274 extern int audit_to_watch(struct audit_krule
*krule
, char *path
, int len
, u32 op
);
275 extern int audit_add_watch(struct audit_krule
*krule
, struct list_head
**list
);
276 extern void audit_remove_watch_rule(struct audit_krule
*krule
);
277 extern char *audit_watch_path(struct audit_watch
*watch
);
278 extern int audit_watch_compare(struct audit_watch
*watch
, unsigned long ino
, dev_t dev
);
280 extern struct audit_fsnotify_mark
*audit_alloc_mark(struct audit_krule
*krule
, char *pathname
, int len
);
281 extern char *audit_mark_path(struct audit_fsnotify_mark
*mark
);
282 extern void audit_remove_mark(struct audit_fsnotify_mark
*audit_mark
);
283 extern void audit_remove_mark_rule(struct audit_krule
*krule
);
284 extern int audit_mark_compare(struct audit_fsnotify_mark
*mark
, unsigned long ino
, dev_t dev
);
285 extern int audit_dupe_exe(struct audit_krule
*new, struct audit_krule
*old
);
286 extern int audit_exe_compare(struct task_struct
*tsk
, struct audit_fsnotify_mark
*mark
);
289 #define audit_put_watch(w) {}
290 #define audit_get_watch(w) {}
291 #define audit_to_watch(k, p, l, o) (-EINVAL)
292 #define audit_add_watch(k, l) (-EINVAL)
293 #define audit_remove_watch_rule(k) BUG()
294 #define audit_watch_path(w) ""
295 #define audit_watch_compare(w, i, d) 0
297 #define audit_alloc_mark(k, p, l) (ERR_PTR(-EINVAL))
298 #define audit_mark_path(m) ""
299 #define audit_remove_mark(m)
300 #define audit_remove_mark_rule(k)
301 #define audit_mark_compare(m, i, d) 0
302 #define audit_exe_compare(t, m) (-EINVAL)
303 #define audit_dupe_exe(n, o) (-EINVAL)
304 #endif /* CONFIG_AUDITSYSCALL */
306 #ifdef CONFIG_AUDITSYSCALL
307 extern struct audit_chunk
*audit_tree_lookup(const struct inode
*inode
);
308 extern void audit_put_chunk(struct audit_chunk
*chunk
);
309 extern bool audit_tree_match(struct audit_chunk
*chunk
, struct audit_tree
*tree
);
310 extern int audit_make_tree(struct audit_krule
*rule
, char *pathname
, u32 op
);
311 extern int audit_add_tree_rule(struct audit_krule
*rule
);
312 extern int audit_remove_tree_rule(struct audit_krule
*rule
);
313 extern void audit_trim_trees(void);
314 extern int audit_tag_tree(char *old
, char *new);
315 extern const char *audit_tree_path(struct audit_tree
*tree
);
316 extern void audit_put_tree(struct audit_tree
*tree
);
317 extern void audit_kill_trees(struct list_head
*list
);
319 #define audit_remove_tree_rule(rule) BUG()
320 #define audit_add_tree_rule(rule) -EINVAL
321 #define audit_make_tree(rule, str, op) -EINVAL
322 #define audit_trim_trees() (void)0
323 #define audit_put_tree(tree) (void)0
324 #define audit_tag_tree(old, new) -EINVAL
325 #define audit_tree_path(rule) "" /* never called */
326 #define audit_kill_trees(list) BUG()
329 extern char *audit_unpack_string(void **bufp
, size_t *remain
, size_t len
);
331 extern pid_t audit_sig_pid
;
332 extern kuid_t audit_sig_uid
;
333 extern u32 audit_sig_sid
;
335 extern int audit_filter(int msgtype
, unsigned int listtype
);
337 #ifdef CONFIG_AUDITSYSCALL
338 extern int audit_signal_info(int sig
, struct task_struct
*t
);
339 extern void audit_filter_inodes(struct task_struct
*tsk
, struct audit_context
*ctx
);
340 extern struct list_head
*audit_killed_trees(void);
342 #define audit_signal_info(s,t) AUDIT_DISABLED
343 #define audit_filter_inodes(t,c) AUDIT_DISABLED
346 extern void audit_ctl_lock(void);
347 extern void audit_ctl_unlock(void);