1 /* audit.c -- Auditing support
2 * Gateway between the kernel (e.g., selinux) and the user-space audit daemon.
3 * System-call specific features have moved to auditsc.c
5 * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * Written by Rickard E. (Rik) Faith <faith@redhat.com>
24 * Goals: 1) Integrate fully with SELinux.
25 * 2) Minimal run-time overhead:
26 * a) Minimal when syscall auditing is disabled (audit_enable=0).
27 * b) Small when syscall auditing is enabled and no audit record
28 * is generated (defer as much work as possible to record
30 * i) context is allocated,
31 * ii) names from getname are stored without a copy, and
32 * iii) inode information stored from path_lookup.
33 * 3) Ability to disable syscall auditing at boot time (audit=0).
34 * 4) Usable by other parts of the kernel (if audit_log* is called,
35 * then a syscall record will be generated automatically for the
37 * 5) Netlink interface to user-space.
38 * 6) Support low-overhead kernel-based filtering to minimize the
39 * information that must be passed to user-space.
41 * Example user-space utilities: http://people.redhat.com/sgrubb/audit/
44 #include <linux/init.h>
45 #include <asm/atomic.h>
46 #include <asm/types.h>
48 #include <linux/module.h>
50 #include <linux/audit.h>
53 #include <linux/skbuff.h>
54 #include <linux/netlink.h>
56 /* No auditing will take place until audit_initialized != 0.
57 * (Initialization happens after skb_init is called.) */
58 static int audit_initialized
;
60 /* No syscall auditing will take place unless audit_enabled != 0. */
63 /* Default state when kernel boots without any parameters. */
64 static int audit_default
;
66 /* If auditing cannot proceed, audit_failure selects what happens. */
67 static int audit_failure
= AUDIT_FAIL_PRINTK
;
69 /* If audit records are to be written to the netlink socket, audit_pid
70 * contains the (non-zero) pid. */
73 /* If audit_limit is non-zero, limit the rate of sending audit records
74 * to that number per second. This prevents DoS attacks, but results in
75 * audit records being dropped. */
76 static int audit_rate_limit
;
78 /* Number of outstanding audit_buffers allowed. */
79 static int audit_backlog_limit
= 64;
80 static atomic_t audit_backlog
= ATOMIC_INIT(0);
82 /* Records can be lost in several ways:
83 0) [suppressed in audit_alloc]
84 1) out of memory in audit_log_start [kmalloc of struct audit_buffer]
85 2) out of memory in audit_log_move [alloc_skb]
86 3) suppressed due to audit_rate_limit
87 4) suppressed due to audit_backlog_limit
89 static atomic_t audit_lost
= ATOMIC_INIT(0);
91 /* The netlink socket. */
92 static struct sock
*audit_sock
;
94 /* There are two lists of audit buffers. The txlist contains audit
95 * buffers that cannot be sent immediately to the netlink device because
96 * we are in an irq context (these are sent later in a tasklet).
98 * The second list is a list of pre-allocated audit buffers (if more
99 * than AUDIT_MAXFREE are in use, the audit buffer is freed instead of
100 * being placed on the freelist). */
101 static DEFINE_SPINLOCK(audit_txlist_lock
);
102 static DEFINE_SPINLOCK(audit_freelist_lock
);
103 static int audit_freelist_count
= 0;
104 static LIST_HEAD(audit_txlist
);
105 static LIST_HEAD(audit_freelist
);
107 /* There are three lists of rules -- one to search at task creation
108 * time, one to search at syscall entry time, and another to search at
109 * syscall exit time. */
110 static LIST_HEAD(audit_tsklist
);
111 static LIST_HEAD(audit_entlist
);
112 static LIST_HEAD(audit_extlist
);
114 /* The netlink socket is only to be read by 1 CPU, which lets us assume
115 * that list additions and deletions never happen simultaneiously in
117 static DECLARE_MUTEX(audit_netlink_sem
);
119 /* AUDIT_BUFSIZ is the size of the temporary buffer used for formatting
120 * audit records. Since printk uses a 1024 byte buffer, this buffer
121 * should be at least that large. */
122 #define AUDIT_BUFSIZ 1024
124 /* AUDIT_MAXFREE is the number of empty audit_buffers we keep on the
125 * audit_freelist. Doing so eliminates many kmalloc/kfree calls. */
126 #define AUDIT_MAXFREE (2*NR_CPUS)
128 /* The audit_buffer is used when formatting an audit record. The caller
129 * locks briefly to get the record off the freelist or to allocate the
130 * buffer, and locks briefly to send the buffer to the netlink layer or
131 * to place it on a transmit queue. Multiple audit_buffers can be in
132 * use simultaneously. */
133 struct audit_buffer
{
134 struct list_head list
;
135 struct sk_buff_head sklist
; /* formatted skbs ready to send */
136 struct audit_context
*ctx
; /* NULL or associated context */
137 int len
; /* used area of tmp */
138 char tmp
[AUDIT_BUFSIZ
];
140 /* Pointer to header and contents */
141 struct nlmsghdr
*nlh
;
147 void audit_set_type(struct audit_buffer
*ab
, int type
)
153 struct list_head list
;
154 struct audit_rule rule
;
157 static void audit_log_end_irq(struct audit_buffer
*ab
);
158 static void audit_log_end_fast(struct audit_buffer
*ab
);
160 static void audit_panic(const char *message
)
162 switch (audit_failure
)
164 case AUDIT_FAIL_SILENT
:
166 case AUDIT_FAIL_PRINTK
:
167 printk(KERN_ERR
"audit: %s\n", message
);
169 case AUDIT_FAIL_PANIC
:
170 panic("audit: %s\n", message
);
175 static inline int audit_rate_check(void)
177 static unsigned long last_check
= 0;
178 static int messages
= 0;
179 static DEFINE_SPINLOCK(lock
);
182 unsigned long elapsed
;
185 if (!audit_rate_limit
) return 1;
187 spin_lock_irqsave(&lock
, flags
);
188 if (++messages
< audit_rate_limit
) {
192 elapsed
= now
- last_check
;
199 spin_unlock_irqrestore(&lock
, flags
);
204 /* Emit at least 1 message per second, even if audit_rate_check is
206 void audit_log_lost(const char *message
)
208 static unsigned long last_msg
= 0;
209 static DEFINE_SPINLOCK(lock
);
214 atomic_inc(&audit_lost
);
216 print
= (audit_failure
== AUDIT_FAIL_PANIC
|| !audit_rate_limit
);
219 spin_lock_irqsave(&lock
, flags
);
221 if (now
- last_msg
> HZ
) {
225 spin_unlock_irqrestore(&lock
, flags
);
230 "audit: audit_lost=%d audit_backlog=%d"
231 " audit_rate_limit=%d audit_backlog_limit=%d\n",
232 atomic_read(&audit_lost
),
233 atomic_read(&audit_backlog
),
235 audit_backlog_limit
);
236 audit_panic(message
);
241 static int audit_set_rate_limit(int limit
, uid_t loginuid
)
243 int old
= audit_rate_limit
;
244 audit_rate_limit
= limit
;
245 audit_log(NULL
, "audit_rate_limit=%d old=%d by auid %u",
246 audit_rate_limit
, old
, loginuid
);
250 static int audit_set_backlog_limit(int limit
, uid_t loginuid
)
252 int old
= audit_backlog_limit
;
253 audit_backlog_limit
= limit
;
254 audit_log(NULL
, "audit_backlog_limit=%d old=%d by auid %u",
255 audit_backlog_limit
, old
, loginuid
);
259 static int audit_set_enabled(int state
, uid_t loginuid
)
261 int old
= audit_enabled
;
262 if (state
!= 0 && state
!= 1)
264 audit_enabled
= state
;
265 audit_log(NULL
, "audit_enabled=%d old=%d by auid %u",
266 audit_enabled
, old
, loginuid
);
270 static int audit_set_failure(int state
, uid_t loginuid
)
272 int old
= audit_failure
;
273 if (state
!= AUDIT_FAIL_SILENT
274 && state
!= AUDIT_FAIL_PRINTK
275 && state
!= AUDIT_FAIL_PANIC
)
277 audit_failure
= state
;
278 audit_log(NULL
, "audit_failure=%d old=%d by auid %u",
279 audit_failure
, old
, loginuid
);
284 void audit_send_reply(int pid
, int seq
, int type
, int done
, int multi
,
285 void *payload
, int size
)
288 struct nlmsghdr
*nlh
;
289 int len
= NLMSG_SPACE(size
);
291 int flags
= multi
? NLM_F_MULTI
: 0;
292 int t
= done
? NLMSG_DONE
: type
;
294 skb
= alloc_skb(len
, GFP_KERNEL
);
298 nlh
= NLMSG_PUT(skb
, pid
, seq
, t
, len
- sizeof(*nlh
));
299 nlh
->nlmsg_flags
= flags
;
300 data
= NLMSG_DATA(nlh
);
301 memcpy(data
, payload
, size
);
302 netlink_unicast(audit_sock
, skb
, pid
, MSG_DONTWAIT
);
305 nlmsg_failure
: /* Used by NLMSG_PUT */
311 * Check for appropriate CAP_AUDIT_ capabilities on incoming audit
314 static int audit_netlink_ok(kernel_cap_t eff_cap
, u16 msg_type
)
324 if (!cap_raised(eff_cap
, CAP_AUDIT_CONTROL
))
328 if (!cap_raised(eff_cap
, CAP_AUDIT_WRITE
))
331 default: /* bad msg */
338 static int audit_receive_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
342 struct audit_status
*status_get
, status_set
;
344 struct audit_buffer
*ab
;
345 u16 msg_type
= nlh
->nlmsg_type
;
346 uid_t loginuid
; /* loginuid of sender */
348 err
= audit_netlink_ok(NETLINK_CB(skb
).eff_cap
, msg_type
);
352 pid
= NETLINK_CREDS(skb
)->pid
;
353 uid
= NETLINK_CREDS(skb
)->uid
;
354 loginuid
= NETLINK_CB(skb
).loginuid
;
355 seq
= nlh
->nlmsg_seq
;
356 data
= NLMSG_DATA(nlh
);
360 status_set
.enabled
= audit_enabled
;
361 status_set
.failure
= audit_failure
;
362 status_set
.pid
= audit_pid
;
363 status_set
.rate_limit
= audit_rate_limit
;
364 status_set
.backlog_limit
= audit_backlog_limit
;
365 status_set
.lost
= atomic_read(&audit_lost
);
366 status_set
.backlog
= atomic_read(&audit_backlog
);
367 audit_send_reply(NETLINK_CB(skb
).pid
, seq
, AUDIT_GET
, 0, 0,
368 &status_set
, sizeof(status_set
));
371 if (nlh
->nlmsg_len
< sizeof(struct audit_status
))
373 status_get
= (struct audit_status
*)data
;
374 if (status_get
->mask
& AUDIT_STATUS_ENABLED
) {
375 err
= audit_set_enabled(status_get
->enabled
, loginuid
);
376 if (err
< 0) return err
;
378 if (status_get
->mask
& AUDIT_STATUS_FAILURE
) {
379 err
= audit_set_failure(status_get
->failure
, loginuid
);
380 if (err
< 0) return err
;
382 if (status_get
->mask
& AUDIT_STATUS_PID
) {
384 audit_pid
= status_get
->pid
;
385 audit_log(NULL
, "audit_pid=%d old=%d by auid %u",
386 audit_pid
, old
, loginuid
);
388 if (status_get
->mask
& AUDIT_STATUS_RATE_LIMIT
)
389 audit_set_rate_limit(status_get
->rate_limit
, loginuid
);
390 if (status_get
->mask
& AUDIT_STATUS_BACKLOG_LIMIT
)
391 audit_set_backlog_limit(status_get
->backlog_limit
,
395 ab
= audit_log_start(NULL
);
397 break; /* audit_panic has been called */
399 "user pid=%d uid=%d length=%d loginuid=%u"
403 - ((char *)data
- (char *)nlh
)),
404 loginuid
, (char *)data
);
405 ab
->type
= AUDIT_USER
;
411 if (nlh
->nlmsg_len
< sizeof(struct audit_rule
))
415 #ifdef CONFIG_AUDITSYSCALL
416 err
= audit_receive_filter(nlh
->nlmsg_type
, NETLINK_CB(skb
).pid
,
417 uid
, seq
, data
, loginuid
);
427 return err
< 0 ? err
: 0;
430 /* Get message from skb (based on rtnetlink_rcv_skb). Each message is
431 * processed by audit_receive_msg. Malformed skbs with wrong length are
432 * discarded silently. */
433 static int audit_receive_skb(struct sk_buff
*skb
)
436 struct nlmsghdr
*nlh
;
439 while (skb
->len
>= NLMSG_SPACE(0)) {
440 nlh
= (struct nlmsghdr
*)skb
->data
;
441 if (nlh
->nlmsg_len
< sizeof(*nlh
) || skb
->len
< nlh
->nlmsg_len
)
443 rlen
= NLMSG_ALIGN(nlh
->nlmsg_len
);
446 if ((err
= audit_receive_msg(skb
, nlh
))) {
447 netlink_ack(skb
, nlh
, err
);
448 } else if (nlh
->nlmsg_flags
& NLM_F_ACK
)
449 netlink_ack(skb
, nlh
, 0);
455 /* Receive messages from netlink socket. */
456 static void audit_receive(struct sock
*sk
, int length
)
460 if (down_trylock(&audit_netlink_sem
))
463 /* FIXME: this must not cause starvation */
464 while ((skb
= skb_dequeue(&sk
->sk_receive_queue
))) {
465 if (audit_receive_skb(skb
) && skb
->len
)
466 skb_queue_head(&sk
->sk_receive_queue
, skb
);
470 up(&audit_netlink_sem
);
473 /* Move data from tmp buffer into an skb. This is an extra copy, and
474 * that is unfortunate. However, the copy will only occur when a record
475 * is being written to user space, which is already a high-overhead
476 * operation. (Elimination of the copy is possible, for example, by
477 * writing directly into a pre-allocated skb, at the cost of wasting
479 static void audit_log_move(struct audit_buffer
*ab
)
483 int extra
= ab
->nlh
? 0 : NLMSG_SPACE(0);
485 /* possible resubmission */
489 skb
= skb_peek(&ab
->sklist
);
490 if (!skb
|| skb_tailroom(skb
) <= ab
->len
+ extra
) {
491 skb
= alloc_skb(2 * ab
->len
+ extra
, GFP_ATOMIC
);
493 ab
->len
= 0; /* Lose information in ab->tmp */
494 audit_log_lost("out of memory in audit_log_move");
497 __skb_queue_tail(&ab
->sklist
, skb
);
499 ab
->nlh
= (struct nlmsghdr
*)skb_put(skb
,
502 start
= skb_put(skb
, ab
->len
);
503 memcpy(start
, ab
->tmp
, ab
->len
);
507 /* Iterate over the skbuff in the audit_buffer, sending their contents
509 static inline int audit_log_drain(struct audit_buffer
*ab
)
513 while ((skb
= skb_dequeue(&ab
->sklist
))) {
518 ab
->nlh
->nlmsg_len
= ab
->total
;
519 ab
->nlh
->nlmsg_type
= ab
->type
;
520 ab
->nlh
->nlmsg_flags
= 0;
521 ab
->nlh
->nlmsg_seq
= 0;
522 ab
->nlh
->nlmsg_pid
= ab
->pid
;
524 skb_get(skb
); /* because netlink_* frees */
525 retval
= netlink_unicast(audit_sock
, skb
, audit_pid
,
528 if (retval
== -EAGAIN
&&
529 (atomic_read(&audit_backlog
)) < audit_backlog_limit
) {
530 skb_queue_head(&ab
->sklist
, skb
);
531 audit_log_end_irq(ab
);
535 if (retval
== -ECONNREFUSED
) {
537 "audit: *NO* daemon at audit_pid=%d\n",
541 audit_log_lost("netlink socket too busy");
543 if (!audit_pid
) { /* No daemon */
544 int offset
= ab
->nlh
? NLMSG_SPACE(0) : 0;
545 int len
= skb
->len
- offset
;
546 skb
->data
[offset
+ len
] = '\0';
547 printk(KERN_ERR
"%s\n", skb
->data
+ offset
);
555 /* Initialize audit support at boot time. */
556 static int __init
audit_init(void)
558 printk(KERN_INFO
"audit: initializing netlink socket (%s)\n",
559 audit_default
? "enabled" : "disabled");
560 audit_sock
= netlink_kernel_create(NETLINK_AUDIT
, audit_receive
);
562 audit_panic("cannot initialize netlink socket");
564 audit_initialized
= 1;
565 audit_enabled
= audit_default
;
566 audit_log(NULL
, "initialized");
571 /* Without CONFIG_NET, we have no skbuffs. For now, print what we have
573 static void audit_log_move(struct audit_buffer
*ab
)
575 printk(KERN_ERR
"%*.*s\n", ab
->len
, ab
->len
, ab
->tmp
);
579 static inline int audit_log_drain(struct audit_buffer
*ab
)
584 /* Initialize audit support at boot time. */
585 int __init
audit_init(void)
587 printk(KERN_INFO
"audit: initializing WITHOUT netlink support\n");
591 audit_initialized
= 1;
592 audit_enabled
= audit_default
;
593 audit_log(NULL
, "initialized");
598 __initcall(audit_init
);
600 /* Process kernel command-line parameter at boot time. audit=0 or audit=1. */
601 static int __init
audit_enable(char *str
)
603 audit_default
= !!simple_strtol(str
, NULL
, 0);
604 printk(KERN_INFO
"audit: %s%s\n",
605 audit_default
? "enabled" : "disabled",
606 audit_initialized
? "" : " (after initialization)");
607 if (audit_initialized
)
608 audit_enabled
= audit_default
;
612 __setup("audit=", audit_enable
);
615 /* Obtain an audit buffer. This routine does locking to obtain the
616 * audit buffer, but then no locking is required for calls to
617 * audit_log_*format. If the tsk is a task that is currently in a
618 * syscall, then the syscall is marked as auditable and an audit record
619 * will be written at syscall exit. If there is no associated task, tsk
621 struct audit_buffer
*audit_log_start(struct audit_context
*ctx
)
623 struct audit_buffer
*ab
= NULL
;
628 if (!audit_initialized
)
631 if (audit_backlog_limit
632 && atomic_read(&audit_backlog
) > audit_backlog_limit
) {
633 if (audit_rate_check())
635 "audit: audit_backlog=%d > "
636 "audit_backlog_limit=%d\n",
637 atomic_read(&audit_backlog
),
638 audit_backlog_limit
);
639 audit_log_lost("backlog limit exceeded");
643 spin_lock_irqsave(&audit_freelist_lock
, flags
);
644 if (!list_empty(&audit_freelist
)) {
645 ab
= list_entry(audit_freelist
.next
,
646 struct audit_buffer
, list
);
648 --audit_freelist_count
;
650 spin_unlock_irqrestore(&audit_freelist_lock
, flags
);
653 ab
= kmalloc(sizeof(*ab
), GFP_ATOMIC
);
655 audit_log_lost("out of memory in audit_log_start");
659 atomic_inc(&audit_backlog
);
660 skb_queue_head_init(&ab
->sklist
);
666 ab
->type
= AUDIT_KERNEL
;
669 #ifdef CONFIG_AUDITSYSCALL
671 audit_get_stamp(ab
->ctx
, &t
, &serial
);
678 audit_log_format(ab
, "audit(%lu.%03lu:%u): ",
679 t
.tv_sec
, t
.tv_nsec
/1000000, serial
);
684 /* Format an audit message into the audit buffer. If there isn't enough
685 * room in the audit buffer, more room will be allocated and vsnprint
686 * will be called a second time. Currently, we assume that a printk
687 * can't format message larger than 1024 bytes, so we don't either. */
688 static void audit_log_vformat(struct audit_buffer
*ab
, const char *fmt
,
696 avail
= sizeof(ab
->tmp
) - ab
->len
;
699 avail
= sizeof(ab
->tmp
) - ab
->len
;
701 len
= vsnprintf(ab
->tmp
+ ab
->len
, avail
, fmt
, args
);
703 /* The printk buffer is 1024 bytes long, so if we get
704 * here and AUDIT_BUFSIZ is at least 1024, then we can
705 * log everything that printk could have logged. */
707 avail
= sizeof(ab
->tmp
) - ab
->len
;
708 len
= vsnprintf(ab
->tmp
+ ab
->len
, avail
, fmt
, args
);
710 ab
->len
+= (len
< avail
) ? len
: avail
;
711 ab
->total
+= (len
< avail
) ? len
: avail
;
714 /* Format a message into the audit buffer. All the work is done in
715 * audit_log_vformat. */
716 void audit_log_format(struct audit_buffer
*ab
, const char *fmt
, ...)
723 audit_log_vformat(ab
, fmt
, args
);
727 void audit_log_hex(struct audit_buffer
*ab
, const unsigned char *buf
, size_t len
)
731 for (i
=0; i
<len
; i
++)
732 audit_log_format(ab
, "%02x", buf
[i
]);
735 void audit_log_untrustedstring(struct audit_buffer
*ab
, const char *string
)
737 const unsigned char *p
= string
;
740 if (*p
== '"' || *p
== ' ' || *p
< 0x20 || *p
> 0x7f) {
741 audit_log_hex(ab
, string
, strlen(string
));
746 audit_log_format(ab
, "\"%s\"", string
);
750 /* This is a helper-function to print the d_path without using a static
751 * buffer or allocating another buffer in addition to the one in
753 void audit_log_d_path(struct audit_buffer
*ab
, const char *prefix
,
754 struct dentry
*dentry
, struct vfsmount
*vfsmnt
)
759 if (prefix
) audit_log_format(ab
, " %s", prefix
);
763 avail
= sizeof(ab
->tmp
) - ab
->len
;
764 p
= d_path(dentry
, vfsmnt
, ab
->tmp
+ ab
->len
, avail
);
766 /* FIXME: can we save some information here? */
767 audit_log_format(ab
, "<toolong>");
769 /* path isn't at start of buffer */
770 len
= (ab
->tmp
+ sizeof(ab
->tmp
) - 1) - p
;
771 memmove(ab
->tmp
+ ab
->len
, p
, len
);
777 /* Remove queued messages from the audit_txlist and send them to userspace. */
778 static void audit_tasklet_handler(unsigned long arg
)
781 struct audit_buffer
*ab
;
784 spin_lock_irqsave(&audit_txlist_lock
, flags
);
785 list_splice_init(&audit_txlist
, &list
);
786 spin_unlock_irqrestore(&audit_txlist_lock
, flags
);
788 while (!list_empty(&list
)) {
789 ab
= list_entry(list
.next
, struct audit_buffer
, list
);
791 audit_log_end_fast(ab
);
795 static DECLARE_TASKLET(audit_tasklet
, audit_tasklet_handler
, 0);
797 /* The netlink_* functions cannot be called inside an irq context, so
798 * the audit buffer is places on a queue and a tasklet is scheduled to
799 * remove them from the queue outside the irq context. May be called in
801 static void audit_log_end_irq(struct audit_buffer
*ab
)
807 spin_lock_irqsave(&audit_txlist_lock
, flags
);
808 list_add_tail(&ab
->list
, &audit_txlist
);
809 spin_unlock_irqrestore(&audit_txlist_lock
, flags
);
811 tasklet_schedule(&audit_tasklet
);
814 /* Send the message in the audit buffer directly to user space. May not
815 * be called in an irq context. */
816 static void audit_log_end_fast(struct audit_buffer
*ab
)
823 if (!audit_rate_check()) {
824 audit_log_lost("rate limit exceeded");
827 if (audit_log_drain(ab
))
831 atomic_dec(&audit_backlog
);
832 spin_lock_irqsave(&audit_freelist_lock
, flags
);
833 if (++audit_freelist_count
> AUDIT_MAXFREE
)
836 list_add(&ab
->list
, &audit_freelist
);
837 spin_unlock_irqrestore(&audit_freelist_lock
, flags
);
840 /* Send or queue the message in the audit buffer, depending on the
841 * current context. (A convenience function that may be called in any
843 void audit_log_end(struct audit_buffer
*ab
)
846 audit_log_end_irq(ab
);
848 audit_log_end_fast(ab
);
851 /* Log an audit record. This is a convenience function that calls
852 * audit_log_start, audit_log_vformat, and audit_log_end. It may be
853 * called in any context. */
854 void audit_log(struct audit_context
*ctx
, const char *fmt
, ...)
856 struct audit_buffer
*ab
;
859 ab
= audit_log_start(ctx
);
862 audit_log_vformat(ab
, fmt
, args
);