1 /* audit.h -- Auditing support
3 * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * Written by Rickard E. (Rik) Faith <faith@redhat.com>
24 #ifndef _LINUX_AUDIT_H_
25 #define _LINUX_AUDIT_H_
27 #include <linux/elf-em.h>
29 /* The netlink messages for the audit system is divided into blocks:
30 * 1000 - 1099 are for commanding the audit system
31 * 1100 - 1199 user space trusted application messages
32 * 1200 - 1299 messages internal to the audit daemon
33 * 1300 - 1399 audit event messages
34 * 1400 - 1499 SE Linux use
35 * 1500 - 1599 kernel LSPP events
36 * 1600 - 1699 kernel crypto events
37 * 1700 - 1799 kernel anomaly records
38 * 1800 - 1999 future kernel use (maybe integrity labels and related events)
39 * 2000 is for otherwise unclassified kernel audit messages (legacy)
40 * 2001 - 2099 unused (kernel)
41 * 2100 - 2199 user space anomaly records
42 * 2200 - 2299 user space actions taken in response to anomalies
43 * 2300 - 2399 user space generated LSPP events
44 * 2400 - 2499 user space crypto events
45 * 2500 - 2999 future user space (maybe integrity labels and related events)
47 * Messages from 1000-1199 are bi-directional. 1200-1299 & 2100 - 2999 are
48 * exclusively user space. 1300-2099 is kernel --> user space
51 #define AUDIT_GET 1000 /* Get status */
52 #define AUDIT_SET 1001 /* Set status (enable/disable/auditd) */
53 #define AUDIT_LIST 1002 /* List syscall rules -- deprecated */
54 #define AUDIT_ADD 1003 /* Add syscall rule -- deprecated */
55 #define AUDIT_DEL 1004 /* Delete syscall rule -- deprecated */
56 #define AUDIT_USER 1005 /* Message from userspace -- deprecated */
57 #define AUDIT_LOGIN 1006 /* Define the login id and information */
58 #define AUDIT_WATCH_INS 1007 /* Insert file/dir watch entry */
59 #define AUDIT_WATCH_REM 1008 /* Remove file/dir watch entry */
60 #define AUDIT_WATCH_LIST 1009 /* List all file/dir watches */
61 #define AUDIT_SIGNAL_INFO 1010 /* Get info about sender of signal to auditd */
62 #define AUDIT_ADD_RULE 1011 /* Add syscall filtering rule */
63 #define AUDIT_DEL_RULE 1012 /* Delete syscall filtering rule */
64 #define AUDIT_LIST_RULES 1013 /* List syscall filtering rules */
66 #define AUDIT_FIRST_USER_MSG 1100 /* Userspace messages mostly uninteresting to kernel */
67 #define AUDIT_USER_AVC 1107 /* We filter this differently */
68 #define AUDIT_LAST_USER_MSG 1199
69 #define AUDIT_FIRST_USER_MSG2 2100 /* More user space messages */
70 #define AUDIT_LAST_USER_MSG2 2999
72 #define AUDIT_DAEMON_START 1200 /* Daemon startup record */
73 #define AUDIT_DAEMON_END 1201 /* Daemon normal stop record */
74 #define AUDIT_DAEMON_ABORT 1202 /* Daemon error stop record */
75 #define AUDIT_DAEMON_CONFIG 1203 /* Daemon config change */
77 #define AUDIT_SYSCALL 1300 /* Syscall event */
78 #define AUDIT_FS_WATCH 1301 /* Filesystem watch event */
79 #define AUDIT_PATH 1302 /* Filename path information */
80 #define AUDIT_IPC 1303 /* IPC record */
81 #define AUDIT_SOCKETCALL 1304 /* sys_socketcall arguments */
82 #define AUDIT_CONFIG_CHANGE 1305 /* Audit system configuration change */
83 #define AUDIT_SOCKADDR 1306 /* sockaddr copied as syscall arg */
84 #define AUDIT_CWD 1307 /* Current working directory */
85 #define AUDIT_EXECVE 1309 /* execve arguments */
86 #define AUDIT_IPC_SET_PERM 1311 /* IPC new permissions record type */
87 #define AUDIT_MQ_OPEN 1312 /* POSIX MQ open record type */
88 #define AUDIT_MQ_SENDRECV 1313 /* POSIX MQ send/receive record type */
89 #define AUDIT_MQ_NOTIFY 1314 /* POSIX MQ notify record type */
90 #define AUDIT_MQ_GETSETATTR 1315 /* POSIX MQ get/set attribute record type */
92 #define AUDIT_AVC 1400 /* SE Linux avc denial or grant */
93 #define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */
94 #define AUDIT_AVC_PATH 1402 /* dentry, vfsmount pair from avc */
95 #define AUDIT_MAC_POLICY_LOAD 1403 /* Policy file load */
96 #define AUDIT_MAC_STATUS 1404 /* Changed enforcing,permissive,off */
97 #define AUDIT_MAC_CONFIG_CHANGE 1405 /* Changes to booleans */
99 #define AUDIT_FIRST_KERN_ANOM_MSG 1700
100 #define AUDIT_LAST_KERN_ANOM_MSG 1799
101 #define AUDIT_ANOM_PROMISCUOUS 1700 /* Device changed promiscuous mode */
103 #define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */
106 #define AUDIT_FILTER_USER 0x00 /* Apply rule to user-generated messages */
107 #define AUDIT_FILTER_TASK 0x01 /* Apply rule at task creation (not syscall) */
108 #define AUDIT_FILTER_ENTRY 0x02 /* Apply rule at syscall entry */
109 #define AUDIT_FILTER_WATCH 0x03 /* Apply rule to file system watches */
110 #define AUDIT_FILTER_EXIT 0x04 /* Apply rule at syscall exit */
111 #define AUDIT_FILTER_TYPE 0x05 /* Apply rule at audit_log_start */
113 #define AUDIT_NR_FILTERS 6
115 #define AUDIT_FILTER_PREPEND 0x10 /* Prepend to front of list */
118 #define AUDIT_NEVER 0 /* Do not build context if rule matches */
119 #define AUDIT_POSSIBLE 1 /* Build context if rule matches */
120 #define AUDIT_ALWAYS 2 /* Generate audit record if rule matches */
122 /* Rule structure sizes -- if these change, different AUDIT_ADD and
123 * AUDIT_LIST commands must be implemented. */
124 #define AUDIT_MAX_FIELDS 64
125 #define AUDIT_MAX_KEY_LEN 32
126 #define AUDIT_BITMASK_SIZE 64
127 #define AUDIT_WORD(nr) ((__u32)((nr)/32))
128 #define AUDIT_BIT(nr) (1 << ((nr) - AUDIT_WORD(nr)*32))
130 #define AUDIT_SYSCALL_CLASSES 16
131 #define AUDIT_CLASS_DIR_WRITE 0
132 #define AUDIT_CLASS_DIR_WRITE_32 1
133 #define AUDIT_CLASS_CHATTR 2
134 #define AUDIT_CLASS_CHATTR_32 3
136 /* This bitmask is used to validate user input. It represents all bits that
137 * are currently used in an audit field constant understood by the kernel.
138 * If you are adding a new #define AUDIT_<whatever>, please ensure that
139 * AUDIT_UNUSED_BITS is updated if need be. */
140 #define AUDIT_UNUSED_BITS 0x0FFFFC00
144 /* These are useful when checking the
145 * task structure at task creation time
146 * (AUDIT_PER_TASK). */
151 #define AUDIT_FSUID 4
155 #define AUDIT_FSGID 8
156 #define AUDIT_LOGINUID 9
157 #define AUDIT_PERS 10
158 #define AUDIT_ARCH 11
159 #define AUDIT_MSGTYPE 12
160 #define AUDIT_SUBJ_USER 13 /* security label user */
161 #define AUDIT_SUBJ_ROLE 14 /* security label role */
162 #define AUDIT_SUBJ_TYPE 15 /* security label type */
163 #define AUDIT_SUBJ_SEN 16 /* security label sensitivity label */
164 #define AUDIT_SUBJ_CLR 17 /* security label clearance label */
165 #define AUDIT_PPID 18
166 #define AUDIT_OBJ_USER 19
167 #define AUDIT_OBJ_ROLE 20
168 #define AUDIT_OBJ_TYPE 21
169 #define AUDIT_OBJ_LEV_LOW 22
170 #define AUDIT_OBJ_LEV_HIGH 23
172 /* These are ONLY useful when checking
173 * at syscall exit time (AUDIT_AT_EXIT). */
174 #define AUDIT_DEVMAJOR 100
175 #define AUDIT_DEVMINOR 101
176 #define AUDIT_INODE 102
177 #define AUDIT_EXIT 103
178 #define AUDIT_SUCCESS 104 /* exit >= 0; value ignored */
179 #define AUDIT_WATCH 105
181 #define AUDIT_ARG0 200
182 #define AUDIT_ARG1 (AUDIT_ARG0+1)
183 #define AUDIT_ARG2 (AUDIT_ARG0+2)
184 #define AUDIT_ARG3 (AUDIT_ARG0+3)
186 #define AUDIT_FILTERKEY 210
188 #define AUDIT_NEGATE 0x80000000
190 /* These are the supported operators.
201 * 1 1 1 7 all operators
203 #define AUDIT_LESS_THAN 0x10000000
204 #define AUDIT_GREATER_THAN 0x20000000
205 #define AUDIT_NOT_EQUAL 0x30000000
206 #define AUDIT_EQUAL 0x40000000
207 #define AUDIT_LESS_THAN_OR_EQUAL (AUDIT_LESS_THAN|AUDIT_EQUAL)
208 #define AUDIT_GREATER_THAN_OR_EQUAL (AUDIT_GREATER_THAN|AUDIT_EQUAL)
209 #define AUDIT_OPERATORS (AUDIT_EQUAL|AUDIT_NOT_EQUAL)
213 #define AUDIT_STATUS_ENABLED 0x0001
214 #define AUDIT_STATUS_FAILURE 0x0002
215 #define AUDIT_STATUS_PID 0x0004
216 #define AUDIT_STATUS_RATE_LIMIT 0x0008
217 #define AUDIT_STATUS_BACKLOG_LIMIT 0x0010
218 /* Failure-to-log actions */
219 #define AUDIT_FAIL_SILENT 0
220 #define AUDIT_FAIL_PRINTK 1
221 #define AUDIT_FAIL_PANIC 2
223 /* distinguish syscall tables */
224 #define __AUDIT_ARCH_64BIT 0x80000000
225 #define __AUDIT_ARCH_LE 0x40000000
226 #define AUDIT_ARCH_ALPHA (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
227 #define AUDIT_ARCH_ARM (EM_ARM|__AUDIT_ARCH_LE)
228 #define AUDIT_ARCH_ARMEB (EM_ARM)
229 #define AUDIT_ARCH_CRIS (EM_CRIS|__AUDIT_ARCH_LE)
230 #define AUDIT_ARCH_FRV (EM_FRV)
231 #define AUDIT_ARCH_H8300 (EM_H8_300)
232 #define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE)
233 #define AUDIT_ARCH_IA64 (EM_IA_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
234 #define AUDIT_ARCH_M32R (EM_M32R)
235 #define AUDIT_ARCH_M68K (EM_68K)
236 #define AUDIT_ARCH_MIPS (EM_MIPS)
237 #define AUDIT_ARCH_MIPSEL (EM_MIPS|__AUDIT_ARCH_LE)
238 #define AUDIT_ARCH_MIPS64 (EM_MIPS|__AUDIT_ARCH_64BIT)
239 #define AUDIT_ARCH_MIPSEL64 (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
240 #define AUDIT_ARCH_PARISC (EM_PARISC)
241 #define AUDIT_ARCH_PARISC64 (EM_PARISC|__AUDIT_ARCH_64BIT)
242 #define AUDIT_ARCH_PPC (EM_PPC)
243 #define AUDIT_ARCH_PPC64 (EM_PPC64|__AUDIT_ARCH_64BIT)
244 #define AUDIT_ARCH_S390 (EM_S390)
245 #define AUDIT_ARCH_S390X (EM_S390|__AUDIT_ARCH_64BIT)
246 #define AUDIT_ARCH_SH (EM_SH)
247 #define AUDIT_ARCH_SHEL (EM_SH|__AUDIT_ARCH_LE)
248 #define AUDIT_ARCH_SH64 (EM_SH|__AUDIT_ARCH_64BIT)
249 #define AUDIT_ARCH_SHEL64 (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
250 #define AUDIT_ARCH_SPARC (EM_SPARC)
251 #define AUDIT_ARCH_SPARC64 (EM_SPARCV9|__AUDIT_ARCH_64BIT)
252 #define AUDIT_ARCH_V850 (EM_V850|__AUDIT_ARCH_LE)
253 #define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
255 struct audit_status
{
256 __u32 mask
; /* Bit mask for valid entries */
257 __u32 enabled
; /* 1 = enabled, 0 = disabled */
258 __u32 failure
; /* Failure-to-log action */
259 __u32 pid
; /* pid of auditd process */
260 __u32 rate_limit
; /* messages rate limit (per second) */
261 __u32 backlog_limit
; /* waiting messages limit */
262 __u32 lost
; /* messages lost */
263 __u32 backlog
; /* messages waiting in queue */
266 /* audit_rule_data supports filter rules with both integer and string
267 * fields. It corresponds with AUDIT_ADD_RULE, AUDIT_DEL_RULE and
268 * AUDIT_LIST_RULES requests.
270 struct audit_rule_data
{
271 __u32 flags
; /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
272 __u32 action
; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
274 __u32 mask
[AUDIT_BITMASK_SIZE
]; /* syscall(s) affected */
275 __u32 fields
[AUDIT_MAX_FIELDS
];
276 __u32 values
[AUDIT_MAX_FIELDS
];
277 __u32 fieldflags
[AUDIT_MAX_FIELDS
];
278 __u32 buflen
; /* total length of string fields */
279 char buf
[0]; /* string fields buffer */
282 /* audit_rule is supported to maintain backward compatibility with
283 * userspace. It supports integer fields only and corresponds to
284 * AUDIT_ADD, AUDIT_DEL and AUDIT_LIST requests.
286 struct audit_rule
{ /* for AUDIT_LIST, AUDIT_ADD, and AUDIT_DEL */
287 __u32 flags
; /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
288 __u32 action
; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
290 __u32 mask
[AUDIT_BITMASK_SIZE
];
291 __u32 fields
[AUDIT_MAX_FIELDS
];
292 __u32 values
[AUDIT_MAX_FIELDS
];
296 #include <linux/sched.h>
298 struct audit_sig_info
{
305 struct audit_context
;
307 struct netlink_skb_parms
;
312 #define AUDITSC_INVALID 0
313 #define AUDITSC_SUCCESS 1
314 #define AUDITSC_FAILURE 2
315 #define AUDITSC_RESULT(x) ( ((long)(x))<0?AUDITSC_FAILURE:AUDITSC_SUCCESS )
316 extern int __init
audit_register_class(int class, unsigned *list
);
317 #ifdef CONFIG_AUDITSYSCALL
318 /* These are defined in auditsc.c */
320 extern int audit_alloc(struct task_struct
*task
);
321 extern void audit_free(struct task_struct
*task
);
322 extern void audit_syscall_entry(int arch
,
323 int major
, unsigned long a0
, unsigned long a1
,
324 unsigned long a2
, unsigned long a3
);
325 extern void audit_syscall_exit(int failed
, long return_code
);
326 extern void __audit_getname(const char *name
);
327 extern void audit_putname(const char *name
);
328 extern void __audit_inode(const char *name
, const struct inode
*inode
);
329 extern void __audit_inode_child(const char *dname
, const struct inode
*inode
,
331 static inline void audit_getname(const char *name
)
333 if (unlikely(current
->audit_context
))
334 __audit_getname(name
);
336 static inline void audit_inode(const char *name
, const struct inode
*inode
) {
337 if (unlikely(current
->audit_context
))
338 __audit_inode(name
, inode
);
340 static inline void audit_inode_child(const char *dname
,
341 const struct inode
*inode
,
342 unsigned long pino
) {
343 if (unlikely(current
->audit_context
))
344 __audit_inode_child(dname
, inode
, pino
);
347 /* Private API (for audit.c only) */
348 extern unsigned int audit_serial(void);
349 extern void auditsc_get_stamp(struct audit_context
*ctx
,
350 struct timespec
*t
, unsigned int *serial
);
351 extern int audit_set_loginuid(struct task_struct
*task
, uid_t loginuid
);
352 extern uid_t
audit_get_loginuid(struct audit_context
*ctx
);
353 extern int __audit_ipc_obj(struct kern_ipc_perm
*ipcp
);
354 extern int __audit_ipc_set_perm(unsigned long qbytes
, uid_t uid
, gid_t gid
, mode_t mode
);
355 extern int audit_bprm(struct linux_binprm
*bprm
);
356 extern int audit_socketcall(int nargs
, unsigned long *args
);
357 extern int audit_sockaddr(int len
, void *addr
);
358 extern int audit_avc_path(struct dentry
*dentry
, struct vfsmount
*mnt
);
359 extern int audit_set_macxattr(const char *name
);
360 extern int __audit_mq_open(int oflag
, mode_t mode
, struct mq_attr __user
*u_attr
);
361 extern int __audit_mq_timedsend(mqd_t mqdes
, size_t msg_len
, unsigned int msg_prio
, const struct timespec __user
*u_abs_timeout
);
362 extern int __audit_mq_timedreceive(mqd_t mqdes
, size_t msg_len
, unsigned int __user
*u_msg_prio
, const struct timespec __user
*u_abs_timeout
);
363 extern int __audit_mq_notify(mqd_t mqdes
, const struct sigevent __user
*u_notification
);
364 extern int __audit_mq_getsetattr(mqd_t mqdes
, struct mq_attr
*mqstat
);
366 static inline int audit_ipc_obj(struct kern_ipc_perm
*ipcp
)
368 if (unlikely(current
->audit_context
))
369 return __audit_ipc_obj(ipcp
);
372 static inline int audit_ipc_set_perm(unsigned long qbytes
, uid_t uid
, gid_t gid
, mode_t mode
)
374 if (unlikely(current
->audit_context
))
375 return __audit_ipc_set_perm(qbytes
, uid
, gid
, mode
);
378 static inline int audit_mq_open(int oflag
, mode_t mode
, struct mq_attr __user
*u_attr
)
380 if (unlikely(current
->audit_context
))
381 return __audit_mq_open(oflag
, mode
, u_attr
);
384 static inline int audit_mq_timedsend(mqd_t mqdes
, size_t msg_len
, unsigned int msg_prio
, const struct timespec __user
*u_abs_timeout
)
386 if (unlikely(current
->audit_context
))
387 return __audit_mq_timedsend(mqdes
, msg_len
, msg_prio
, u_abs_timeout
);
390 static inline int audit_mq_timedreceive(mqd_t mqdes
, size_t msg_len
, unsigned int __user
*u_msg_prio
, const struct timespec __user
*u_abs_timeout
)
392 if (unlikely(current
->audit_context
))
393 return __audit_mq_timedreceive(mqdes
, msg_len
, u_msg_prio
, u_abs_timeout
);
396 static inline int audit_mq_notify(mqd_t mqdes
, const struct sigevent __user
*u_notification
)
398 if (unlikely(current
->audit_context
))
399 return __audit_mq_notify(mqdes
, u_notification
);
402 static inline int audit_mq_getsetattr(mqd_t mqdes
, struct mq_attr
*mqstat
)
404 if (unlikely(current
->audit_context
))
405 return __audit_mq_getsetattr(mqdes
, mqstat
);
409 #define audit_alloc(t) ({ 0; })
410 #define audit_free(t) do { ; } while (0)
411 #define audit_syscall_entry(ta,a,b,c,d,e) do { ; } while (0)
412 #define audit_syscall_exit(f,r) do { ; } while (0)
413 #define audit_getname(n) do { ; } while (0)
414 #define audit_putname(n) do { ; } while (0)
415 #define __audit_inode(n,i) do { ; } while (0)
416 #define __audit_inode_child(d,i,p) do { ; } while (0)
417 #define audit_inode(n,i) do { ; } while (0)
418 #define audit_inode_child(d,i,p) do { ; } while (0)
419 #define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
420 #define audit_get_loginuid(c) ({ -1; })
421 #define audit_ipc_obj(i) ({ 0; })
422 #define audit_ipc_set_perm(q,u,g,m) ({ 0; })
423 #define audit_bprm(p) ({ 0; })
424 #define audit_socketcall(n,a) ({ 0; })
425 #define audit_sockaddr(len, addr) ({ 0; })
426 #define audit_avc_path(dentry, mnt) ({ 0; })
427 #define audit_set_macxattr(n) do { ; } while (0)
428 #define audit_mq_open(o,m,a) ({ 0; })
429 #define audit_mq_timedsend(d,l,p,t) ({ 0; })
430 #define audit_mq_timedreceive(d,l,p,t) ({ 0; })
431 #define audit_mq_notify(d,n) ({ 0; })
432 #define audit_mq_getsetattr(d,s) ({ 0; })
436 /* These are defined in audit.c */
438 extern void audit_log(struct audit_context
*ctx
, gfp_t gfp_mask
,
439 int type
, const char *fmt
, ...)
440 __attribute__((format(printf
,4,5)));
442 extern struct audit_buffer
*audit_log_start(struct audit_context
*ctx
, gfp_t gfp_mask
, int type
);
443 extern void audit_log_format(struct audit_buffer
*ab
,
444 const char *fmt
, ...)
445 __attribute__((format(printf
,2,3)));
446 extern void audit_log_end(struct audit_buffer
*ab
);
447 extern void audit_log_hex(struct audit_buffer
*ab
,
448 const unsigned char *buf
,
450 extern const char * audit_log_untrustedstring(struct audit_buffer
*ab
,
452 extern const char * audit_log_n_untrustedstring(struct audit_buffer
*ab
,
455 extern void audit_log_d_path(struct audit_buffer
*ab
,
457 struct dentry
*dentry
,
458 struct vfsmount
*vfsmnt
);
459 /* Private API (for audit.c only) */
460 extern int audit_filter_user(struct netlink_skb_parms
*cb
, int type
);
461 extern int audit_filter_type(int type
);
462 extern int audit_receive_filter(int type
, int pid
, int uid
, int seq
,
463 void *data
, size_t datasz
, uid_t loginuid
, u32 sid
);
465 #define audit_log(c,g,t,f,...) do { ; } while (0)
466 #define audit_log_start(c,g,t) ({ NULL; })
467 #define audit_log_vformat(b,f,a) do { ; } while (0)
468 #define audit_log_format(b,f,...) do { ; } while (0)
469 #define audit_log_end(b) do { ; } while (0)
470 #define audit_log_hex(a,b,l) do { ; } while (0)
471 #define audit_log_untrustedstring(a,s) do { ; } while (0)
472 #define audit_log_n_untrustedstring(a,n,s) do { ; } while (0)
473 #define audit_log_d_path(b,p,d,v) do { ; } while (0)