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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>
23 #ifndef _LINUX_AUDIT_H_
24 #define _LINUX_AUDIT_H_
26 #include <linux/sched.h>
27 #include <linux/ptrace.h>
28 #include <linux/namei.h> /* LOOKUP_* */
29 #include <uapi/linux/audit.h>
31 #define AUDIT_INO_UNSET ((unsigned long)-1)
32 #define AUDIT_DEV_UNSET ((dev_t)-1)
34 struct audit_sig_info
{
43 struct netlink_skb_parms
;
57 u32 mask
[AUDIT_BITMASK_SIZE
];
58 u32 buflen
; /* for data alloc on list rules */
60 char *filterkey
; /* ties events to rules */
61 struct audit_field
*fields
;
62 struct audit_field
*arch_f
; /* quick access to arch field */
63 struct audit_field
*inode_f
; /* quick access to an inode field */
64 struct audit_watch
*watch
; /* associated watch */
65 struct audit_tree
*tree
; /* associated watched tree */
66 struct audit_fsnotify_mark
*exe
;
67 struct list_head rlist
; /* entry in audit_{watch,tree}.rules list */
68 struct list_head list
; /* for AUDIT_LIST* purposes only */
72 /* Flag to indicate legacy AUDIT_LOGINUID unset usage */
73 #define AUDIT_LOGINUID_LEGACY 0x1
97 AUDIT_NTP_NVALS
/* count */
100 #ifdef CONFIG_AUDITSYSCALL
101 struct audit_ntp_val
{
102 long long oldval
, newval
;
105 struct audit_ntp_data
{
106 struct audit_ntp_val vals
[AUDIT_NTP_NVALS
];
109 struct audit_ntp_data
{};
112 extern int is_audit_feature_set(int which
);
114 extern int __init
audit_register_class(int class, unsigned *list
);
115 extern int audit_classify_syscall(int abi
, unsigned syscall
);
116 extern int audit_classify_arch(int arch
);
117 /* only for compat system calls */
118 extern unsigned compat_write_class
[];
119 extern unsigned compat_read_class
[];
120 extern unsigned compat_dir_class
[];
121 extern unsigned compat_chattr_class
[];
122 extern unsigned compat_signal_class
[];
124 extern int audit_classify_compat_syscall(int abi
, unsigned syscall
);
126 /* audit_names->type values */
127 #define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
128 #define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
129 #define AUDIT_TYPE_PARENT 2 /* a parent audit record */
130 #define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
131 #define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
133 /* maximized args number that audit_socketcall can process */
134 #define AUDITSC_ARGS 6
136 /* bit values for ->signal->audit_tty */
137 #define AUDIT_TTY_ENABLE BIT(0)
138 #define AUDIT_TTY_LOG_PASSWD BIT(1)
144 #define AUDIT_LOCKED 2
146 /* These are defined in audit.c */
148 extern __printf(4, 5)
149 void audit_log(struct audit_context
*ctx
, gfp_t gfp_mask
, int type
,
150 const char *fmt
, ...);
152 extern struct audit_buffer
*audit_log_start(struct audit_context
*ctx
, gfp_t gfp_mask
, int type
);
153 extern __printf(2, 3)
154 void audit_log_format(struct audit_buffer
*ab
, const char *fmt
, ...);
155 extern void audit_log_end(struct audit_buffer
*ab
);
156 extern bool audit_string_contains_control(const char *string
,
158 extern void audit_log_n_hex(struct audit_buffer
*ab
,
159 const unsigned char *buf
,
161 extern void audit_log_n_string(struct audit_buffer
*ab
,
164 extern void audit_log_n_untrustedstring(struct audit_buffer
*ab
,
167 extern void audit_log_untrustedstring(struct audit_buffer
*ab
,
169 extern void audit_log_d_path(struct audit_buffer
*ab
,
171 const struct path
*path
);
172 extern void audit_log_key(struct audit_buffer
*ab
,
174 extern void audit_log_link_denied(const char *operation
);
175 extern void audit_log_lost(const char *message
);
177 extern int audit_log_task_context(struct audit_buffer
*ab
);
178 extern void audit_log_task_info(struct audit_buffer
*ab
);
180 extern int audit_update_lsm_rules(void);
182 /* Private API (for audit.c only) */
183 extern int audit_rule_change(int type
, int seq
, void *data
, size_t datasz
);
184 extern int audit_list_rules_send(struct sk_buff
*request_skb
, int seq
);
186 extern int audit_set_loginuid(kuid_t loginuid
);
188 static inline kuid_t
audit_get_loginuid(struct task_struct
*tsk
)
190 return tsk
->loginuid
;
193 static inline unsigned int audit_get_sessionid(struct task_struct
*tsk
)
195 return tsk
->sessionid
;
198 extern u32 audit_enabled
;
199 #else /* CONFIG_AUDIT */
200 static inline __printf(4, 5)
201 void audit_log(struct audit_context
*ctx
, gfp_t gfp_mask
, int type
,
202 const char *fmt
, ...)
204 static inline struct audit_buffer
*audit_log_start(struct audit_context
*ctx
,
205 gfp_t gfp_mask
, int type
)
209 static inline __printf(2, 3)
210 void audit_log_format(struct audit_buffer
*ab
, const char *fmt
, ...)
212 static inline void audit_log_end(struct audit_buffer
*ab
)
214 static inline void audit_log_n_hex(struct audit_buffer
*ab
,
215 const unsigned char *buf
, size_t len
)
217 static inline void audit_log_n_string(struct audit_buffer
*ab
,
218 const char *buf
, size_t n
)
220 static inline void audit_log_n_untrustedstring(struct audit_buffer
*ab
,
221 const char *string
, size_t n
)
223 static inline void audit_log_untrustedstring(struct audit_buffer
*ab
,
226 static inline void audit_log_d_path(struct audit_buffer
*ab
,
228 const struct path
*path
)
230 static inline void audit_log_key(struct audit_buffer
*ab
, char *key
)
232 static inline void audit_log_link_denied(const char *string
)
234 static inline int audit_log_task_context(struct audit_buffer
*ab
)
238 static inline void audit_log_task_info(struct audit_buffer
*ab
)
241 static inline kuid_t
audit_get_loginuid(struct task_struct
*tsk
)
246 static inline unsigned int audit_get_sessionid(struct task_struct
*tsk
)
248 return AUDIT_SID_UNSET
;
251 #define audit_enabled AUDIT_OFF
252 #endif /* CONFIG_AUDIT */
254 #ifdef CONFIG_AUDIT_COMPAT_GENERIC
255 #define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
257 #define audit_is_compat(arch) false
260 #ifdef CONFIG_AUDITSYSCALL
261 #include <asm/syscall.h> /* for syscall_get_arch() */
263 /* These are defined in auditsc.c */
265 extern int audit_alloc(struct task_struct
*task
);
266 extern void __audit_free(struct task_struct
*task
);
267 extern void __audit_syscall_entry(int major
, unsigned long a0
, unsigned long a1
,
268 unsigned long a2
, unsigned long a3
);
269 extern void __audit_syscall_exit(int ret_success
, long ret_value
);
270 extern struct filename
*__audit_reusename(const __user
char *uptr
);
271 extern void __audit_getname(struct filename
*name
);
273 #define AUDIT_INODE_PARENT 1 /* dentry represents the parent */
274 #define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
275 #define AUDIT_INODE_NOEVAL 4 /* audit record incomplete */
276 extern void __audit_inode(struct filename
*name
, const struct dentry
*dentry
,
278 extern void __audit_file(const struct file
*);
279 extern void __audit_inode_child(struct inode
*parent
,
280 const struct dentry
*dentry
,
281 const unsigned char type
);
282 extern void audit_seccomp(unsigned long syscall
, long signr
, int code
);
283 extern void audit_seccomp_actions_logged(const char *names
,
284 const char *old_names
, int res
);
285 extern void __audit_ptrace(struct task_struct
*t
);
287 static inline void audit_set_context(struct task_struct
*task
, struct audit_context
*ctx
)
289 task
->audit_context
= ctx
;
292 static inline struct audit_context
*audit_context(void)
294 return current
->audit_context
;
297 static inline bool audit_dummy_context(void)
299 void *p
= audit_context();
300 return !p
|| *(int *)p
;
302 static inline void audit_free(struct task_struct
*task
)
304 if (unlikely(task
->audit_context
))
307 static inline void audit_syscall_entry(int major
, unsigned long a0
,
308 unsigned long a1
, unsigned long a2
,
311 if (unlikely(audit_context()))
312 __audit_syscall_entry(major
, a0
, a1
, a2
, a3
);
314 static inline void audit_syscall_exit(void *pt_regs
)
316 if (unlikely(audit_context())) {
317 int success
= is_syscall_success(pt_regs
);
318 long return_code
= regs_return_value(pt_regs
);
320 __audit_syscall_exit(success
, return_code
);
323 static inline struct filename
*audit_reusename(const __user
char *name
)
325 if (unlikely(!audit_dummy_context()))
326 return __audit_reusename(name
);
329 static inline void audit_getname(struct filename
*name
)
331 if (unlikely(!audit_dummy_context()))
332 __audit_getname(name
);
334 static inline void audit_inode(struct filename
*name
,
335 const struct dentry
*dentry
,
336 unsigned int flags
) {
337 if (unlikely(!audit_dummy_context())) {
338 unsigned int aflags
= 0;
340 if (flags
& LOOKUP_PARENT
)
341 aflags
|= AUDIT_INODE_PARENT
;
342 if (flags
& LOOKUP_NO_EVAL
)
343 aflags
|= AUDIT_INODE_NOEVAL
;
344 __audit_inode(name
, dentry
, aflags
);
347 static inline void audit_file(struct file
*file
)
349 if (unlikely(!audit_dummy_context()))
352 static inline void audit_inode_parent_hidden(struct filename
*name
,
353 const struct dentry
*dentry
)
355 if (unlikely(!audit_dummy_context()))
356 __audit_inode(name
, dentry
,
357 AUDIT_INODE_PARENT
| AUDIT_INODE_HIDDEN
);
359 static inline void audit_inode_child(struct inode
*parent
,
360 const struct dentry
*dentry
,
361 const unsigned char type
) {
362 if (unlikely(!audit_dummy_context()))
363 __audit_inode_child(parent
, dentry
, type
);
365 void audit_core_dumps(long signr
);
367 static inline void audit_ptrace(struct task_struct
*t
)
369 if (unlikely(!audit_dummy_context()))
373 /* Private API (for audit.c only) */
374 extern void __audit_ipc_obj(struct kern_ipc_perm
*ipcp
);
375 extern void __audit_ipc_set_perm(unsigned long qbytes
, uid_t uid
, gid_t gid
, umode_t mode
);
376 extern void __audit_bprm(struct linux_binprm
*bprm
);
377 extern int __audit_socketcall(int nargs
, unsigned long *args
);
378 extern int __audit_sockaddr(int len
, void *addr
);
379 extern void __audit_fd_pair(int fd1
, int fd2
);
380 extern void __audit_mq_open(int oflag
, umode_t mode
, struct mq_attr
*attr
);
381 extern void __audit_mq_sendrecv(mqd_t mqdes
, size_t msg_len
, unsigned int msg_prio
, const struct timespec64
*abs_timeout
);
382 extern void __audit_mq_notify(mqd_t mqdes
, const struct sigevent
*notification
);
383 extern void __audit_mq_getsetattr(mqd_t mqdes
, struct mq_attr
*mqstat
);
384 extern int __audit_log_bprm_fcaps(struct linux_binprm
*bprm
,
385 const struct cred
*new,
386 const struct cred
*old
);
387 extern void __audit_log_capset(const struct cred
*new, const struct cred
*old
);
388 extern void __audit_mmap_fd(int fd
, int flags
);
389 extern void __audit_log_kern_module(char *name
);
390 extern void __audit_fanotify(unsigned int response
);
391 extern void __audit_tk_injoffset(struct timespec64 offset
);
392 extern void __audit_ntp_log(const struct audit_ntp_data
*ad
);
394 static inline void audit_ipc_obj(struct kern_ipc_perm
*ipcp
)
396 if (unlikely(!audit_dummy_context()))
397 __audit_ipc_obj(ipcp
);
399 static inline void audit_fd_pair(int fd1
, int fd2
)
401 if (unlikely(!audit_dummy_context()))
402 __audit_fd_pair(fd1
, fd2
);
404 static inline void audit_ipc_set_perm(unsigned long qbytes
, uid_t uid
, gid_t gid
, umode_t mode
)
406 if (unlikely(!audit_dummy_context()))
407 __audit_ipc_set_perm(qbytes
, uid
, gid
, mode
);
409 static inline void audit_bprm(struct linux_binprm
*bprm
)
411 if (unlikely(!audit_dummy_context()))
414 static inline int audit_socketcall(int nargs
, unsigned long *args
)
416 if (unlikely(!audit_dummy_context()))
417 return __audit_socketcall(nargs
, args
);
421 static inline int audit_socketcall_compat(int nargs
, u32
*args
)
423 unsigned long a
[AUDITSC_ARGS
];
426 if (audit_dummy_context())
429 for (i
= 0; i
< nargs
; i
++)
430 a
[i
] = (unsigned long)args
[i
];
431 return __audit_socketcall(nargs
, a
);
434 static inline int audit_sockaddr(int len
, void *addr
)
436 if (unlikely(!audit_dummy_context()))
437 return __audit_sockaddr(len
, addr
);
440 static inline void audit_mq_open(int oflag
, umode_t mode
, struct mq_attr
*attr
)
442 if (unlikely(!audit_dummy_context()))
443 __audit_mq_open(oflag
, mode
, attr
);
445 static inline void audit_mq_sendrecv(mqd_t mqdes
, size_t msg_len
, unsigned int msg_prio
, const struct timespec64
*abs_timeout
)
447 if (unlikely(!audit_dummy_context()))
448 __audit_mq_sendrecv(mqdes
, msg_len
, msg_prio
, abs_timeout
);
450 static inline void audit_mq_notify(mqd_t mqdes
, const struct sigevent
*notification
)
452 if (unlikely(!audit_dummy_context()))
453 __audit_mq_notify(mqdes
, notification
);
455 static inline void audit_mq_getsetattr(mqd_t mqdes
, struct mq_attr
*mqstat
)
457 if (unlikely(!audit_dummy_context()))
458 __audit_mq_getsetattr(mqdes
, mqstat
);
461 static inline int audit_log_bprm_fcaps(struct linux_binprm
*bprm
,
462 const struct cred
*new,
463 const struct cred
*old
)
465 if (unlikely(!audit_dummy_context()))
466 return __audit_log_bprm_fcaps(bprm
, new, old
);
470 static inline void audit_log_capset(const struct cred
*new,
471 const struct cred
*old
)
473 if (unlikely(!audit_dummy_context()))
474 __audit_log_capset(new, old
);
477 static inline void audit_mmap_fd(int fd
, int flags
)
479 if (unlikely(!audit_dummy_context()))
480 __audit_mmap_fd(fd
, flags
);
483 static inline void audit_log_kern_module(char *name
)
485 if (!audit_dummy_context())
486 __audit_log_kern_module(name
);
489 static inline void audit_fanotify(unsigned int response
)
491 if (!audit_dummy_context())
492 __audit_fanotify(response
);
495 static inline void audit_tk_injoffset(struct timespec64 offset
)
497 /* ignore no-op events */
498 if (offset
.tv_sec
== 0 && offset
.tv_nsec
== 0)
501 if (!audit_dummy_context())
502 __audit_tk_injoffset(offset
);
505 static inline void audit_ntp_init(struct audit_ntp_data
*ad
)
507 memset(ad
, 0, sizeof(*ad
));
510 static inline void audit_ntp_set_old(struct audit_ntp_data
*ad
,
511 enum audit_ntp_type type
, long long val
)
513 ad
->vals
[type
].oldval
= val
;
516 static inline void audit_ntp_set_new(struct audit_ntp_data
*ad
,
517 enum audit_ntp_type type
, long long val
)
519 ad
->vals
[type
].newval
= val
;
522 static inline void audit_ntp_log(const struct audit_ntp_data
*ad
)
524 if (!audit_dummy_context())
528 extern int audit_n_rules
;
529 extern int audit_signals
;
530 #else /* CONFIG_AUDITSYSCALL */
531 static inline int audit_alloc(struct task_struct
*task
)
535 static inline void audit_free(struct task_struct
*task
)
537 static inline void audit_syscall_entry(int major
, unsigned long a0
,
538 unsigned long a1
, unsigned long a2
,
541 static inline void audit_syscall_exit(void *pt_regs
)
543 static inline bool audit_dummy_context(void)
547 static inline void audit_set_context(struct task_struct
*task
, struct audit_context
*ctx
)
549 static inline struct audit_context
*audit_context(void)
553 static inline struct filename
*audit_reusename(const __user
char *name
)
557 static inline void audit_getname(struct filename
*name
)
559 static inline void __audit_inode(struct filename
*name
,
560 const struct dentry
*dentry
,
563 static inline void __audit_inode_child(struct inode
*parent
,
564 const struct dentry
*dentry
,
565 const unsigned char type
)
567 static inline void audit_inode(struct filename
*name
,
568 const struct dentry
*dentry
,
571 static inline void audit_file(struct file
*file
)
574 static inline void audit_inode_parent_hidden(struct filename
*name
,
575 const struct dentry
*dentry
)
577 static inline void audit_inode_child(struct inode
*parent
,
578 const struct dentry
*dentry
,
579 const unsigned char type
)
581 static inline void audit_core_dumps(long signr
)
583 static inline void audit_seccomp(unsigned long syscall
, long signr
, int code
)
585 static inline void audit_seccomp_actions_logged(const char *names
,
586 const char *old_names
, int res
)
588 static inline void audit_ipc_obj(struct kern_ipc_perm
*ipcp
)
590 static inline void audit_ipc_set_perm(unsigned long qbytes
, uid_t uid
,
591 gid_t gid
, umode_t mode
)
593 static inline void audit_bprm(struct linux_binprm
*bprm
)
595 static inline int audit_socketcall(int nargs
, unsigned long *args
)
600 static inline int audit_socketcall_compat(int nargs
, u32
*args
)
605 static inline void audit_fd_pair(int fd1
, int fd2
)
607 static inline int audit_sockaddr(int len
, void *addr
)
611 static inline void audit_mq_open(int oflag
, umode_t mode
, struct mq_attr
*attr
)
613 static inline void audit_mq_sendrecv(mqd_t mqdes
, size_t msg_len
,
614 unsigned int msg_prio
,
615 const struct timespec64
*abs_timeout
)
617 static inline void audit_mq_notify(mqd_t mqdes
,
618 const struct sigevent
*notification
)
620 static inline void audit_mq_getsetattr(mqd_t mqdes
, struct mq_attr
*mqstat
)
622 static inline int audit_log_bprm_fcaps(struct linux_binprm
*bprm
,
623 const struct cred
*new,
624 const struct cred
*old
)
628 static inline void audit_log_capset(const struct cred
*new,
629 const struct cred
*old
)
631 static inline void audit_mmap_fd(int fd
, int flags
)
634 static inline void audit_log_kern_module(char *name
)
638 static inline void audit_fanotify(unsigned int response
)
641 static inline void audit_tk_injoffset(struct timespec64 offset
)
644 static inline void audit_ntp_init(struct audit_ntp_data
*ad
)
647 static inline void audit_ntp_set_old(struct audit_ntp_data
*ad
,
648 enum audit_ntp_type type
, long long val
)
651 static inline void audit_ntp_set_new(struct audit_ntp_data
*ad
,
652 enum audit_ntp_type type
, long long val
)
655 static inline void audit_ntp_log(const struct audit_ntp_data
*ad
)
658 static inline void audit_ptrace(struct task_struct
*t
)
660 #define audit_n_rules 0
661 #define audit_signals 0
662 #endif /* CONFIG_AUDITSYSCALL */
664 static inline bool audit_loginuid_set(struct task_struct
*tsk
)
666 return uid_valid(audit_get_loginuid(tsk
));
669 static inline void audit_log_string(struct audit_buffer
*ab
, const char *buf
)
671 audit_log_n_string(ab
, buf
, strlen(buf
));