1 /* auditsc.c -- System-call auditing support
2 * Handles all system-call specific auditing features.
4 * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
5 * Copyright 2005 Hewlett-Packard Development Company, L.P.
6 * Copyright (C) 2005, 2006 IBM Corporation
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * Written by Rickard E. (Rik) Faith <faith@redhat.com>
25 * Many of the ideas implemented here are from Stephen C. Tweedie,
26 * especially the idea of avoiding a copy by using getname.
28 * The method for actual interception of syscall entry and exit (not in
29 * this file -- see entry.S) is based on a GPL'd patch written by
30 * okir@suse.de and Copyright 2003 SuSE Linux AG.
32 * POSIX message queue support added by George Wilson <ltcgcw@us.ibm.com>,
35 * The support of additional filter rules compares (>, <, >=, <=) was
36 * added by Dustin Kirkland <dustin.kirkland@us.ibm.com>, 2005.
38 * Modified by Amy Griffis <amy.griffis@hp.com> to collect additional
39 * filesystem information.
41 * Subject and object context labeling support added by <danjones@us.ibm.com>
42 * and <dustin.kirkland@us.ibm.com> for LSPP certification compliance.
45 #include <linux/init.h>
46 #include <asm/types.h>
47 #include <asm/atomic.h>
48 #include <asm/types.h>
50 #include <linux/namei.h>
52 #include <linux/module.h>
53 #include <linux/mount.h>
54 #include <linux/socket.h>
55 #include <linux/mqueue.h>
56 #include <linux/audit.h>
57 #include <linux/personality.h>
58 #include <linux/time.h>
59 #include <linux/netlink.h>
60 #include <linux/compiler.h>
61 #include <asm/unistd.h>
62 #include <linux/security.h>
63 #include <linux/list.h>
64 #include <linux/tty.h>
65 #include <linux/selinux.h>
66 #include <linux/binfmts.h>
67 #include <linux/highmem.h>
68 #include <linux/syscalls.h>
72 extern struct list_head audit_filter_list
[];
74 /* No syscall auditing will take place unless audit_enabled != 0. */
75 extern int audit_enabled
;
77 /* AUDIT_NAMES is the number of slots we reserve in the audit_context
78 * for saving names from getname(). */
79 #define AUDIT_NAMES 20
81 /* AUDIT_NAMES_RESERVED is the number of slots we reserve in the
82 * audit_context from being used for nameless inodes from
84 #define AUDIT_NAMES_RESERVED 7
86 /* Indicates that audit should log the full pathname. */
87 #define AUDIT_NAME_FULL -1
89 /* number of audit rules */
92 /* When fs/namei.c:getname() is called, we store the pointer in name and
93 * we don't let putname() free it (instead we free all of the saved
94 * pointers at syscall exit time).
96 * Further, in fs/namei.c:path_lookup() we store the inode and device. */
99 int name_len
; /* number of name's characters to log */
100 unsigned name_put
; /* call __putname() for this name */
110 struct audit_aux_data
{
111 struct audit_aux_data
*next
;
115 #define AUDIT_AUX_IPCPERM 0
117 struct audit_aux_data_mq_open
{
118 struct audit_aux_data d
;
124 struct audit_aux_data_mq_sendrecv
{
125 struct audit_aux_data d
;
128 unsigned int msg_prio
;
129 struct timespec abs_timeout
;
132 struct audit_aux_data_mq_notify
{
133 struct audit_aux_data d
;
135 struct sigevent notification
;
138 struct audit_aux_data_mq_getsetattr
{
139 struct audit_aux_data d
;
141 struct mq_attr mqstat
;
144 struct audit_aux_data_ipcctl
{
145 struct audit_aux_data d
;
147 unsigned long qbytes
;
154 struct audit_aux_data_execve
{
155 struct audit_aux_data d
;
161 struct audit_aux_data_socketcall
{
162 struct audit_aux_data d
;
164 unsigned long args
[0];
167 struct audit_aux_data_sockaddr
{
168 struct audit_aux_data d
;
173 struct audit_aux_data_path
{
174 struct audit_aux_data d
;
175 struct dentry
*dentry
;
176 struct vfsmount
*mnt
;
179 /* The per-task audit context. */
180 struct audit_context
{
181 int dummy
; /* must be the first element */
182 int in_syscall
; /* 1 if task is in a syscall */
183 enum audit_state state
;
184 unsigned int serial
; /* serial number for record */
185 struct timespec ctime
; /* time of syscall entry */
186 uid_t loginuid
; /* login uid (identity) */
187 int major
; /* syscall number */
188 unsigned long argv
[4]; /* syscall arguments */
189 int return_valid
; /* return code is valid */
190 long return_code
;/* syscall return code */
191 int auditable
; /* 1 if record should be written */
193 struct audit_names names
[AUDIT_NAMES
];
194 char * filterkey
; /* key for rule that triggered record */
196 struct vfsmount
* pwdmnt
;
197 struct audit_context
*previous
; /* For nested syscalls */
198 struct audit_aux_data
*aux
;
200 /* Save things to print about task_struct */
202 uid_t uid
, euid
, suid
, fsuid
;
203 gid_t gid
, egid
, sgid
, fsgid
;
204 unsigned long personality
;
213 #define ACC_MODE(x) ("\004\002\006\006"[(x)&O_ACCMODE])
214 static inline int open_arg(int flags
, int mask
)
216 int n
= ACC_MODE(flags
);
217 if (flags
& (O_TRUNC
| O_CREAT
))
218 n
|= AUDIT_PERM_WRITE
;
222 static int audit_match_perm(struct audit_context
*ctx
, int mask
)
224 unsigned n
= ctx
->major
;
225 switch (audit_classify_syscall(ctx
->arch
, n
)) {
227 if ((mask
& AUDIT_PERM_WRITE
) &&
228 audit_match_class(AUDIT_CLASS_WRITE
, n
))
230 if ((mask
& AUDIT_PERM_READ
) &&
231 audit_match_class(AUDIT_CLASS_READ
, n
))
233 if ((mask
& AUDIT_PERM_ATTR
) &&
234 audit_match_class(AUDIT_CLASS_CHATTR
, n
))
237 case 1: /* 32bit on biarch */
238 if ((mask
& AUDIT_PERM_WRITE
) &&
239 audit_match_class(AUDIT_CLASS_WRITE_32
, n
))
241 if ((mask
& AUDIT_PERM_READ
) &&
242 audit_match_class(AUDIT_CLASS_READ_32
, n
))
244 if ((mask
& AUDIT_PERM_ATTR
) &&
245 audit_match_class(AUDIT_CLASS_CHATTR_32
, n
))
249 return mask
& ACC_MODE(ctx
->argv
[1]);
251 return mask
& ACC_MODE(ctx
->argv
[2]);
252 case 4: /* socketcall */
253 return ((mask
& AUDIT_PERM_WRITE
) && ctx
->argv
[0] == SYS_BIND
);
255 return mask
& AUDIT_PERM_EXEC
;
261 /* Determine if any context name data matches a rule's watch data */
262 /* Compare a task_struct with an audit_rule. Return 1 on match, 0
264 static int audit_filter_rules(struct task_struct
*tsk
,
265 struct audit_krule
*rule
,
266 struct audit_context
*ctx
,
267 struct audit_names
*name
,
268 enum audit_state
*state
)
270 int i
, j
, need_sid
= 1;
273 for (i
= 0; i
< rule
->field_count
; i
++) {
274 struct audit_field
*f
= &rule
->fields
[i
];
279 result
= audit_comparator(tsk
->pid
, f
->op
, f
->val
);
284 ctx
->ppid
= sys_getppid();
285 result
= audit_comparator(ctx
->ppid
, f
->op
, f
->val
);
289 result
= audit_comparator(tsk
->uid
, f
->op
, f
->val
);
292 result
= audit_comparator(tsk
->euid
, f
->op
, f
->val
);
295 result
= audit_comparator(tsk
->suid
, f
->op
, f
->val
);
298 result
= audit_comparator(tsk
->fsuid
, f
->op
, f
->val
);
301 result
= audit_comparator(tsk
->gid
, f
->op
, f
->val
);
304 result
= audit_comparator(tsk
->egid
, f
->op
, f
->val
);
307 result
= audit_comparator(tsk
->sgid
, f
->op
, f
->val
);
310 result
= audit_comparator(tsk
->fsgid
, f
->op
, f
->val
);
313 result
= audit_comparator(tsk
->personality
, f
->op
, f
->val
);
317 result
= audit_comparator(ctx
->arch
, f
->op
, f
->val
);
321 if (ctx
&& ctx
->return_valid
)
322 result
= audit_comparator(ctx
->return_code
, f
->op
, f
->val
);
325 if (ctx
&& ctx
->return_valid
) {
327 result
= audit_comparator(ctx
->return_valid
, f
->op
, AUDITSC_SUCCESS
);
329 result
= audit_comparator(ctx
->return_valid
, f
->op
, AUDITSC_FAILURE
);
334 result
= audit_comparator(MAJOR(name
->dev
),
337 for (j
= 0; j
< ctx
->name_count
; j
++) {
338 if (audit_comparator(MAJOR(ctx
->names
[j
].dev
), f
->op
, f
->val
)) {
347 result
= audit_comparator(MINOR(name
->dev
),
350 for (j
= 0; j
< ctx
->name_count
; j
++) {
351 if (audit_comparator(MINOR(ctx
->names
[j
].dev
), f
->op
, f
->val
)) {
360 result
= (name
->ino
== f
->val
);
362 for (j
= 0; j
< ctx
->name_count
; j
++) {
363 if (audit_comparator(ctx
->names
[j
].ino
, f
->op
, f
->val
)) {
371 if (name
&& rule
->watch
->ino
!= (unsigned long)-1)
372 result
= (name
->dev
== rule
->watch
->dev
&&
373 name
->ino
== rule
->watch
->ino
);
378 result
= audit_comparator(ctx
->loginuid
, f
->op
, f
->val
);
380 case AUDIT_SUBJ_USER
:
381 case AUDIT_SUBJ_ROLE
:
382 case AUDIT_SUBJ_TYPE
:
385 /* NOTE: this may return negative values indicating
386 a temporary error. We simply treat this as a
387 match for now to avoid losing information that
388 may be wanted. An error message will also be
392 selinux_get_task_sid(tsk
, &sid
);
395 result
= selinux_audit_rule_match(sid
, f
->type
,
404 case AUDIT_OBJ_LEV_LOW
:
405 case AUDIT_OBJ_LEV_HIGH
:
406 /* The above note for AUDIT_SUBJ_USER...AUDIT_SUBJ_CLR
409 /* Find files that match */
411 result
= selinux_audit_rule_match(
412 name
->osid
, f
->type
, f
->op
,
415 for (j
= 0; j
< ctx
->name_count
; j
++) {
416 if (selinux_audit_rule_match(
425 /* Find ipc objects that match */
427 struct audit_aux_data
*aux
;
428 for (aux
= ctx
->aux
; aux
;
430 if (aux
->type
== AUDIT_IPC
) {
431 struct audit_aux_data_ipcctl
*axi
= (void *)aux
;
432 if (selinux_audit_rule_match(axi
->osid
, f
->type
, f
->op
, f
->se_rule
, ctx
)) {
446 result
= audit_comparator(ctx
->argv
[f
->type
-AUDIT_ARG0
], f
->op
, f
->val
);
448 case AUDIT_FILTERKEY
:
449 /* ignore this field for filtering */
453 result
= audit_match_perm(ctx
, f
->val
);
461 ctx
->filterkey
= kstrdup(rule
->filterkey
, GFP_ATOMIC
);
462 switch (rule
->action
) {
463 case AUDIT_NEVER
: *state
= AUDIT_DISABLED
; break;
464 case AUDIT_ALWAYS
: *state
= AUDIT_RECORD_CONTEXT
; break;
469 /* At process creation time, we can determine if system-call auditing is
470 * completely disabled for this task. Since we only have the task
471 * structure at this point, we can only check uid and gid.
473 static enum audit_state
audit_filter_task(struct task_struct
*tsk
)
475 struct audit_entry
*e
;
476 enum audit_state state
;
479 list_for_each_entry_rcu(e
, &audit_filter_list
[AUDIT_FILTER_TASK
], list
) {
480 if (audit_filter_rules(tsk
, &e
->rule
, NULL
, NULL
, &state
)) {
486 return AUDIT_BUILD_CONTEXT
;
489 /* At syscall entry and exit time, this filter is called if the
490 * audit_state is not low enough that auditing cannot take place, but is
491 * also not high enough that we already know we have to write an audit
492 * record (i.e., the state is AUDIT_SETUP_CONTEXT or AUDIT_BUILD_CONTEXT).
494 static enum audit_state
audit_filter_syscall(struct task_struct
*tsk
,
495 struct audit_context
*ctx
,
496 struct list_head
*list
)
498 struct audit_entry
*e
;
499 enum audit_state state
;
501 if (audit_pid
&& tsk
->tgid
== audit_pid
)
502 return AUDIT_DISABLED
;
505 if (!list_empty(list
)) {
506 int word
= AUDIT_WORD(ctx
->major
);
507 int bit
= AUDIT_BIT(ctx
->major
);
509 list_for_each_entry_rcu(e
, list
, list
) {
510 if ((e
->rule
.mask
[word
] & bit
) == bit
&&
511 audit_filter_rules(tsk
, &e
->rule
, ctx
, NULL
,
519 return AUDIT_BUILD_CONTEXT
;
522 /* At syscall exit time, this filter is called if any audit_names[] have been
523 * collected during syscall processing. We only check rules in sublists at hash
524 * buckets applicable to the inode numbers in audit_names[].
525 * Regarding audit_state, same rules apply as for audit_filter_syscall().
527 enum audit_state
audit_filter_inodes(struct task_struct
*tsk
,
528 struct audit_context
*ctx
)
531 struct audit_entry
*e
;
532 enum audit_state state
;
534 if (audit_pid
&& tsk
->tgid
== audit_pid
)
535 return AUDIT_DISABLED
;
538 for (i
= 0; i
< ctx
->name_count
; i
++) {
539 int word
= AUDIT_WORD(ctx
->major
);
540 int bit
= AUDIT_BIT(ctx
->major
);
541 struct audit_names
*n
= &ctx
->names
[i
];
542 int h
= audit_hash_ino((u32
)n
->ino
);
543 struct list_head
*list
= &audit_inode_hash
[h
];
545 if (list_empty(list
))
548 list_for_each_entry_rcu(e
, list
, list
) {
549 if ((e
->rule
.mask
[word
] & bit
) == bit
&&
550 audit_filter_rules(tsk
, &e
->rule
, ctx
, n
, &state
)) {
557 return AUDIT_BUILD_CONTEXT
;
560 void audit_set_auditable(struct audit_context
*ctx
)
565 static inline struct audit_context
*audit_get_context(struct task_struct
*tsk
,
569 struct audit_context
*context
= tsk
->audit_context
;
571 if (likely(!context
))
573 context
->return_valid
= return_valid
;
574 context
->return_code
= return_code
;
576 if (context
->in_syscall
&& !context
->dummy
&& !context
->auditable
) {
577 enum audit_state state
;
579 state
= audit_filter_syscall(tsk
, context
, &audit_filter_list
[AUDIT_FILTER_EXIT
]);
580 if (state
== AUDIT_RECORD_CONTEXT
) {
581 context
->auditable
= 1;
585 state
= audit_filter_inodes(tsk
, context
);
586 if (state
== AUDIT_RECORD_CONTEXT
)
587 context
->auditable
= 1;
593 tsk
->audit_context
= NULL
;
597 static inline void audit_free_names(struct audit_context
*context
)
602 if (context
->auditable
603 ||context
->put_count
+ context
->ino_count
!= context
->name_count
) {
604 printk(KERN_ERR
"%s:%d(:%d): major=%d in_syscall=%d"
605 " name_count=%d put_count=%d"
606 " ino_count=%d [NOT freeing]\n",
608 context
->serial
, context
->major
, context
->in_syscall
,
609 context
->name_count
, context
->put_count
,
611 for (i
= 0; i
< context
->name_count
; i
++) {
612 printk(KERN_ERR
"names[%d] = %p = %s\n", i
,
613 context
->names
[i
].name
,
614 context
->names
[i
].name
?: "(null)");
621 context
->put_count
= 0;
622 context
->ino_count
= 0;
625 for (i
= 0; i
< context
->name_count
; i
++) {
626 if (context
->names
[i
].name
&& context
->names
[i
].name_put
)
627 __putname(context
->names
[i
].name
);
629 context
->name_count
= 0;
633 mntput(context
->pwdmnt
);
635 context
->pwdmnt
= NULL
;
638 static inline void audit_free_aux(struct audit_context
*context
)
640 struct audit_aux_data
*aux
;
642 while ((aux
= context
->aux
)) {
643 if (aux
->type
== AUDIT_AVC_PATH
) {
644 struct audit_aux_data_path
*axi
= (void *)aux
;
649 context
->aux
= aux
->next
;
654 static inline void audit_zero_context(struct audit_context
*context
,
655 enum audit_state state
)
657 uid_t loginuid
= context
->loginuid
;
659 memset(context
, 0, sizeof(*context
));
660 context
->state
= state
;
661 context
->loginuid
= loginuid
;
664 static inline struct audit_context
*audit_alloc_context(enum audit_state state
)
666 struct audit_context
*context
;
668 if (!(context
= kmalloc(sizeof(*context
), GFP_KERNEL
)))
670 audit_zero_context(context
, state
);
675 * audit_alloc - allocate an audit context block for a task
678 * Filter on the task information and allocate a per-task audit context
679 * if necessary. Doing so turns on system call auditing for the
680 * specified task. This is called from copy_process, so no lock is
683 int audit_alloc(struct task_struct
*tsk
)
685 struct audit_context
*context
;
686 enum audit_state state
;
688 if (likely(!audit_enabled
))
689 return 0; /* Return if not auditing. */
691 state
= audit_filter_task(tsk
);
692 if (likely(state
== AUDIT_DISABLED
))
695 if (!(context
= audit_alloc_context(state
))) {
696 audit_log_lost("out of memory in audit_alloc");
700 /* Preserve login uid */
701 context
->loginuid
= -1;
702 if (current
->audit_context
)
703 context
->loginuid
= current
->audit_context
->loginuid
;
705 tsk
->audit_context
= context
;
706 set_tsk_thread_flag(tsk
, TIF_SYSCALL_AUDIT
);
710 static inline void audit_free_context(struct audit_context
*context
)
712 struct audit_context
*previous
;
716 previous
= context
->previous
;
717 if (previous
|| (count
&& count
< 10)) {
719 printk(KERN_ERR
"audit(:%d): major=%d name_count=%d:"
720 " freeing multiple contexts (%d)\n",
721 context
->serial
, context
->major
,
722 context
->name_count
, count
);
724 audit_free_names(context
);
725 audit_free_aux(context
);
726 kfree(context
->filterkey
);
731 printk(KERN_ERR
"audit: freed %d contexts\n", count
);
734 void audit_log_task_context(struct audit_buffer
*ab
)
741 selinux_get_task_sid(current
, &sid
);
745 error
= selinux_sid_to_string(sid
, &ctx
, &len
);
747 if (error
!= -EINVAL
)
752 audit_log_format(ab
, " subj=%s", ctx
);
757 audit_panic("error in audit_log_task_context");
761 EXPORT_SYMBOL(audit_log_task_context
);
763 static void audit_log_task_info(struct audit_buffer
*ab
, struct task_struct
*tsk
)
765 char name
[sizeof(tsk
->comm
)];
766 struct mm_struct
*mm
= tsk
->mm
;
767 struct vm_area_struct
*vma
;
771 get_task_comm(name
, tsk
);
772 audit_log_format(ab
, " comm=");
773 audit_log_untrustedstring(ab
, name
);
776 down_read(&mm
->mmap_sem
);
779 if ((vma
->vm_flags
& VM_EXECUTABLE
) &&
781 audit_log_d_path(ab
, "exe=",
782 vma
->vm_file
->f_path
.dentry
,
783 vma
->vm_file
->f_path
.mnt
);
788 up_read(&mm
->mmap_sem
);
790 audit_log_task_context(ab
);
793 static void audit_log_exit(struct audit_context
*context
, struct task_struct
*tsk
)
795 int i
, call_panic
= 0;
796 struct audit_buffer
*ab
;
797 struct audit_aux_data
*aux
;
801 context
->pid
= tsk
->pid
;
803 context
->ppid
= sys_getppid();
804 context
->uid
= tsk
->uid
;
805 context
->gid
= tsk
->gid
;
806 context
->euid
= tsk
->euid
;
807 context
->suid
= tsk
->suid
;
808 context
->fsuid
= tsk
->fsuid
;
809 context
->egid
= tsk
->egid
;
810 context
->sgid
= tsk
->sgid
;
811 context
->fsgid
= tsk
->fsgid
;
812 context
->personality
= tsk
->personality
;
814 ab
= audit_log_start(context
, GFP_KERNEL
, AUDIT_SYSCALL
);
816 return; /* audit_panic has been called */
817 audit_log_format(ab
, "arch=%x syscall=%d",
818 context
->arch
, context
->major
);
819 if (context
->personality
!= PER_LINUX
)
820 audit_log_format(ab
, " per=%lx", context
->personality
);
821 if (context
->return_valid
)
822 audit_log_format(ab
, " success=%s exit=%ld",
823 (context
->return_valid
==AUDITSC_SUCCESS
)?"yes":"no",
824 context
->return_code
);
826 mutex_lock(&tty_mutex
);
827 read_lock(&tasklist_lock
);
828 if (tsk
->signal
&& tsk
->signal
->tty
&& tsk
->signal
->tty
->name
)
829 tty
= tsk
->signal
->tty
->name
;
832 read_unlock(&tasklist_lock
);
834 " a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
835 " ppid=%d pid=%d auid=%u uid=%u gid=%u"
836 " euid=%u suid=%u fsuid=%u"
837 " egid=%u sgid=%u fsgid=%u tty=%s",
848 context
->euid
, context
->suid
, context
->fsuid
,
849 context
->egid
, context
->sgid
, context
->fsgid
, tty
);
851 mutex_unlock(&tty_mutex
);
853 audit_log_task_info(ab
, tsk
);
854 if (context
->filterkey
) {
855 audit_log_format(ab
, " key=");
856 audit_log_untrustedstring(ab
, context
->filterkey
);
858 audit_log_format(ab
, " key=(null)");
861 for (aux
= context
->aux
; aux
; aux
= aux
->next
) {
863 ab
= audit_log_start(context
, GFP_KERNEL
, aux
->type
);
865 continue; /* audit_panic has been called */
868 case AUDIT_MQ_OPEN
: {
869 struct audit_aux_data_mq_open
*axi
= (void *)aux
;
871 "oflag=0x%x mode=%#o mq_flags=0x%lx mq_maxmsg=%ld "
872 "mq_msgsize=%ld mq_curmsgs=%ld",
873 axi
->oflag
, axi
->mode
, axi
->attr
.mq_flags
,
874 axi
->attr
.mq_maxmsg
, axi
->attr
.mq_msgsize
,
875 axi
->attr
.mq_curmsgs
);
878 case AUDIT_MQ_SENDRECV
: {
879 struct audit_aux_data_mq_sendrecv
*axi
= (void *)aux
;
881 "mqdes=%d msg_len=%zd msg_prio=%u "
882 "abs_timeout_sec=%ld abs_timeout_nsec=%ld",
883 axi
->mqdes
, axi
->msg_len
, axi
->msg_prio
,
884 axi
->abs_timeout
.tv_sec
, axi
->abs_timeout
.tv_nsec
);
887 case AUDIT_MQ_NOTIFY
: {
888 struct audit_aux_data_mq_notify
*axi
= (void *)aux
;
890 "mqdes=%d sigev_signo=%d",
892 axi
->notification
.sigev_signo
);
895 case AUDIT_MQ_GETSETATTR
: {
896 struct audit_aux_data_mq_getsetattr
*axi
= (void *)aux
;
898 "mqdes=%d mq_flags=0x%lx mq_maxmsg=%ld mq_msgsize=%ld "
901 axi
->mqstat
.mq_flags
, axi
->mqstat
.mq_maxmsg
,
902 axi
->mqstat
.mq_msgsize
, axi
->mqstat
.mq_curmsgs
);
906 struct audit_aux_data_ipcctl
*axi
= (void *)aux
;
908 "ouid=%u ogid=%u mode=%x",
909 axi
->uid
, axi
->gid
, axi
->mode
);
910 if (axi
->osid
!= 0) {
913 if (selinux_sid_to_string(
914 axi
->osid
, &ctx
, &len
)) {
915 audit_log_format(ab
, " osid=%u",
919 audit_log_format(ab
, " obj=%s", ctx
);
924 case AUDIT_IPC_SET_PERM
: {
925 struct audit_aux_data_ipcctl
*axi
= (void *)aux
;
927 "qbytes=%lx ouid=%u ogid=%u mode=%x",
928 axi
->qbytes
, axi
->uid
, axi
->gid
, axi
->mode
);
932 struct audit_aux_data_execve
*axi
= (void *)aux
;
935 for (i
= 0, p
= axi
->mem
; i
< axi
->argc
; i
++) {
936 audit_log_format(ab
, "a%d=", i
);
937 p
= audit_log_untrustedstring(ab
, p
);
938 audit_log_format(ab
, "\n");
942 case AUDIT_SOCKETCALL
: {
944 struct audit_aux_data_socketcall
*axs
= (void *)aux
;
945 audit_log_format(ab
, "nargs=%d", axs
->nargs
);
946 for (i
=0; i
<axs
->nargs
; i
++)
947 audit_log_format(ab
, " a%d=%lx", i
, axs
->args
[i
]);
950 case AUDIT_SOCKADDR
: {
951 struct audit_aux_data_sockaddr
*axs
= (void *)aux
;
953 audit_log_format(ab
, "saddr=");
954 audit_log_hex(ab
, axs
->a
, axs
->len
);
957 case AUDIT_AVC_PATH
: {
958 struct audit_aux_data_path
*axi
= (void *)aux
;
959 audit_log_d_path(ab
, "path=", axi
->dentry
, axi
->mnt
);
966 if (context
->pwd
&& context
->pwdmnt
) {
967 ab
= audit_log_start(context
, GFP_KERNEL
, AUDIT_CWD
);
969 audit_log_d_path(ab
, "cwd=", context
->pwd
, context
->pwdmnt
);
973 for (i
= 0; i
< context
->name_count
; i
++) {
974 struct audit_names
*n
= &context
->names
[i
];
976 ab
= audit_log_start(context
, GFP_KERNEL
, AUDIT_PATH
);
978 continue; /* audit_panic has been called */
980 audit_log_format(ab
, "item=%d", i
);
983 switch(n
->name_len
) {
984 case AUDIT_NAME_FULL
:
985 /* log the full path */
986 audit_log_format(ab
, " name=");
987 audit_log_untrustedstring(ab
, n
->name
);
990 /* name was specified as a relative path and the
991 * directory component is the cwd */
992 audit_log_d_path(ab
, " name=", context
->pwd
,
996 /* log the name's directory component */
997 audit_log_format(ab
, " name=");
998 audit_log_n_untrustedstring(ab
, n
->name_len
,
1002 audit_log_format(ab
, " name=(null)");
1004 if (n
->ino
!= (unsigned long)-1) {
1005 audit_log_format(ab
, " inode=%lu"
1006 " dev=%02x:%02x mode=%#o"
1007 " ouid=%u ogid=%u rdev=%02x:%02x",
1020 if (selinux_sid_to_string(
1021 n
->osid
, &ctx
, &len
)) {
1022 audit_log_format(ab
, " osid=%u", n
->osid
);
1025 audit_log_format(ab
, " obj=%s", ctx
);
1032 audit_panic("error converting sid to string");
1036 * audit_free - free a per-task audit context
1037 * @tsk: task whose audit context block to free
1039 * Called from copy_process and do_exit
1041 void audit_free(struct task_struct
*tsk
)
1043 struct audit_context
*context
;
1045 context
= audit_get_context(tsk
, 0, 0);
1046 if (likely(!context
))
1049 /* Check for system calls that do not go through the exit
1050 * function (e.g., exit_group), then free context block.
1051 * We use GFP_ATOMIC here because we might be doing this
1052 * in the context of the idle thread */
1053 /* that can happen only if we are called from do_exit() */
1054 if (context
->in_syscall
&& context
->auditable
)
1055 audit_log_exit(context
, tsk
);
1057 audit_free_context(context
);
1061 * audit_syscall_entry - fill in an audit record at syscall entry
1062 * @tsk: task being audited
1063 * @arch: architecture type
1064 * @major: major syscall type (function)
1065 * @a1: additional syscall register 1
1066 * @a2: additional syscall register 2
1067 * @a3: additional syscall register 3
1068 * @a4: additional syscall register 4
1070 * Fill in audit context at syscall entry. This only happens if the
1071 * audit context was created when the task was created and the state or
1072 * filters demand the audit context be built. If the state from the
1073 * per-task filter or from the per-syscall filter is AUDIT_RECORD_CONTEXT,
1074 * then the record will be written at syscall exit time (otherwise, it
1075 * will only be written if another part of the kernel requests that it
1078 void audit_syscall_entry(int arch
, int major
,
1079 unsigned long a1
, unsigned long a2
,
1080 unsigned long a3
, unsigned long a4
)
1082 struct task_struct
*tsk
= current
;
1083 struct audit_context
*context
= tsk
->audit_context
;
1084 enum audit_state state
;
1089 * This happens only on certain architectures that make system
1090 * calls in kernel_thread via the entry.S interface, instead of
1091 * with direct calls. (If you are porting to a new
1092 * architecture, hitting this condition can indicate that you
1093 * got the _exit/_leave calls backward in entry.S.)
1097 * ppc64 yes (see arch/powerpc/platforms/iseries/misc.S)
1099 * This also happens with vm86 emulation in a non-nested manner
1100 * (entries without exits), so this case must be caught.
1102 if (context
->in_syscall
) {
1103 struct audit_context
*newctx
;
1107 "audit(:%d) pid=%d in syscall=%d;"
1108 " entering syscall=%d\n",
1109 context
->serial
, tsk
->pid
, context
->major
, major
);
1111 newctx
= audit_alloc_context(context
->state
);
1113 newctx
->previous
= context
;
1115 tsk
->audit_context
= newctx
;
1117 /* If we can't alloc a new context, the best we
1118 * can do is to leak memory (any pending putname
1119 * will be lost). The only other alternative is
1120 * to abandon auditing. */
1121 audit_zero_context(context
, context
->state
);
1124 BUG_ON(context
->in_syscall
|| context
->name_count
);
1129 context
->arch
= arch
;
1130 context
->major
= major
;
1131 context
->argv
[0] = a1
;
1132 context
->argv
[1] = a2
;
1133 context
->argv
[2] = a3
;
1134 context
->argv
[3] = a4
;
1136 state
= context
->state
;
1137 context
->dummy
= !audit_n_rules
;
1138 if (!context
->dummy
&& (state
== AUDIT_SETUP_CONTEXT
|| state
== AUDIT_BUILD_CONTEXT
))
1139 state
= audit_filter_syscall(tsk
, context
, &audit_filter_list
[AUDIT_FILTER_ENTRY
]);
1140 if (likely(state
== AUDIT_DISABLED
))
1143 context
->serial
= 0;
1144 context
->ctime
= CURRENT_TIME
;
1145 context
->in_syscall
= 1;
1146 context
->auditable
= !!(state
== AUDIT_RECORD_CONTEXT
);
1151 * audit_syscall_exit - deallocate audit context after a system call
1152 * @tsk: task being audited
1153 * @valid: success/failure flag
1154 * @return_code: syscall return value
1156 * Tear down after system call. If the audit context has been marked as
1157 * auditable (either because of the AUDIT_RECORD_CONTEXT state from
1158 * filtering, or because some other part of the kernel write an audit
1159 * message), then write out the syscall information. In call cases,
1160 * free the names stored from getname().
1162 void audit_syscall_exit(int valid
, long return_code
)
1164 struct task_struct
*tsk
= current
;
1165 struct audit_context
*context
;
1167 context
= audit_get_context(tsk
, valid
, return_code
);
1169 if (likely(!context
))
1172 if (context
->in_syscall
&& context
->auditable
)
1173 audit_log_exit(context
, tsk
);
1175 context
->in_syscall
= 0;
1176 context
->auditable
= 0;
1178 if (context
->previous
) {
1179 struct audit_context
*new_context
= context
->previous
;
1180 context
->previous
= NULL
;
1181 audit_free_context(context
);
1182 tsk
->audit_context
= new_context
;
1184 audit_free_names(context
);
1185 audit_free_aux(context
);
1186 kfree(context
->filterkey
);
1187 context
->filterkey
= NULL
;
1188 tsk
->audit_context
= context
;
1193 * audit_getname - add a name to the list
1194 * @name: name to add
1196 * Add a name to the list of audit names for this context.
1197 * Called from fs/namei.c:getname().
1199 void __audit_getname(const char *name
)
1201 struct audit_context
*context
= current
->audit_context
;
1203 if (IS_ERR(name
) || !name
)
1206 if (!context
->in_syscall
) {
1207 #if AUDIT_DEBUG == 2
1208 printk(KERN_ERR
"%s:%d(:%d): ignoring getname(%p)\n",
1209 __FILE__
, __LINE__
, context
->serial
, name
);
1214 BUG_ON(context
->name_count
>= AUDIT_NAMES
);
1215 context
->names
[context
->name_count
].name
= name
;
1216 context
->names
[context
->name_count
].name_len
= AUDIT_NAME_FULL
;
1217 context
->names
[context
->name_count
].name_put
= 1;
1218 context
->names
[context
->name_count
].ino
= (unsigned long)-1;
1219 ++context
->name_count
;
1220 if (!context
->pwd
) {
1221 read_lock(¤t
->fs
->lock
);
1222 context
->pwd
= dget(current
->fs
->pwd
);
1223 context
->pwdmnt
= mntget(current
->fs
->pwdmnt
);
1224 read_unlock(¤t
->fs
->lock
);
1229 /* audit_putname - intercept a putname request
1230 * @name: name to intercept and delay for putname
1232 * If we have stored the name from getname in the audit context,
1233 * then we delay the putname until syscall exit.
1234 * Called from include/linux/fs.h:putname().
1236 void audit_putname(const char *name
)
1238 struct audit_context
*context
= current
->audit_context
;
1241 if (!context
->in_syscall
) {
1242 #if AUDIT_DEBUG == 2
1243 printk(KERN_ERR
"%s:%d(:%d): __putname(%p)\n",
1244 __FILE__
, __LINE__
, context
->serial
, name
);
1245 if (context
->name_count
) {
1247 for (i
= 0; i
< context
->name_count
; i
++)
1248 printk(KERN_ERR
"name[%d] = %p = %s\n", i
,
1249 context
->names
[i
].name
,
1250 context
->names
[i
].name
?: "(null)");
1257 ++context
->put_count
;
1258 if (context
->put_count
> context
->name_count
) {
1259 printk(KERN_ERR
"%s:%d(:%d): major=%d"
1260 " in_syscall=%d putname(%p) name_count=%d"
1263 context
->serial
, context
->major
,
1264 context
->in_syscall
, name
, context
->name_count
,
1265 context
->put_count
);
1272 /* Copy inode data into an audit_names. */
1273 static void audit_copy_inode(struct audit_names
*name
, const struct inode
*inode
)
1275 name
->ino
= inode
->i_ino
;
1276 name
->dev
= inode
->i_sb
->s_dev
;
1277 name
->mode
= inode
->i_mode
;
1278 name
->uid
= inode
->i_uid
;
1279 name
->gid
= inode
->i_gid
;
1280 name
->rdev
= inode
->i_rdev
;
1281 selinux_get_inode_sid(inode
, &name
->osid
);
1285 * audit_inode - store the inode and device from a lookup
1286 * @name: name being audited
1287 * @inode: inode being audited
1289 * Called from fs/namei.c:path_lookup().
1291 void __audit_inode(const char *name
, const struct inode
*inode
)
1294 struct audit_context
*context
= current
->audit_context
;
1296 if (!context
->in_syscall
)
1298 if (context
->name_count
1299 && context
->names
[context
->name_count
-1].name
1300 && context
->names
[context
->name_count
-1].name
== name
)
1301 idx
= context
->name_count
- 1;
1302 else if (context
->name_count
> 1
1303 && context
->names
[context
->name_count
-2].name
1304 && context
->names
[context
->name_count
-2].name
== name
)
1305 idx
= context
->name_count
- 2;
1307 /* FIXME: how much do we care about inodes that have no
1308 * associated name? */
1309 if (context
->name_count
>= AUDIT_NAMES
- AUDIT_NAMES_RESERVED
)
1311 idx
= context
->name_count
++;
1312 context
->names
[idx
].name
= NULL
;
1314 ++context
->ino_count
;
1317 audit_copy_inode(&context
->names
[idx
], inode
);
1321 * audit_inode_child - collect inode info for created/removed objects
1322 * @dname: inode's dentry name
1323 * @inode: inode being audited
1324 * @parent: inode of dentry parent
1326 * For syscalls that create or remove filesystem objects, audit_inode
1327 * can only collect information for the filesystem object's parent.
1328 * This call updates the audit context with the child's information.
1329 * Syscalls that create a new filesystem object must be hooked after
1330 * the object is created. Syscalls that remove a filesystem object
1331 * must be hooked prior, in order to capture the target inode during
1332 * unsuccessful attempts.
1334 void __audit_inode_child(const char *dname
, const struct inode
*inode
,
1335 const struct inode
*parent
)
1338 struct audit_context
*context
= current
->audit_context
;
1339 const char *found_name
= NULL
;
1342 if (!context
->in_syscall
)
1345 /* determine matching parent */
1347 goto update_context
;
1348 for (idx
= 0; idx
< context
->name_count
; idx
++)
1349 if (context
->names
[idx
].ino
== parent
->i_ino
) {
1350 const char *name
= context
->names
[idx
].name
;
1355 if (audit_compare_dname_path(dname
, name
, &dirlen
) == 0) {
1356 context
->names
[idx
].name_len
= dirlen
;
1363 idx
= context
->name_count
;
1364 if (context
->name_count
== AUDIT_NAMES
) {
1365 printk(KERN_DEBUG
"name_count maxed and losing %s\n",
1366 found_name
?: "(null)");
1369 context
->name_count
++;
1371 context
->ino_count
++;
1373 /* Re-use the name belonging to the slot for a matching parent directory.
1374 * All names for this context are relinquished in audit_free_names() */
1375 context
->names
[idx
].name
= found_name
;
1376 context
->names
[idx
].name_len
= AUDIT_NAME_FULL
;
1377 context
->names
[idx
].name_put
= 0; /* don't call __putname() */
1380 context
->names
[idx
].ino
= (unsigned long)-1;
1382 audit_copy_inode(&context
->names
[idx
], inode
);
1384 /* A parent was not found in audit_names, so copy the inode data for the
1385 * provided parent. */
1387 idx
= context
->name_count
;
1388 if (context
->name_count
== AUDIT_NAMES
) {
1390 "name_count maxed and losing parent inode data: dev=%02x:%02x, inode=%lu",
1391 MAJOR(parent
->i_sb
->s_dev
),
1392 MINOR(parent
->i_sb
->s_dev
),
1396 context
->name_count
++;
1398 context
->ino_count
++;
1400 audit_copy_inode(&context
->names
[idx
], parent
);
1405 * audit_inode_update - update inode info for last collected name
1406 * @inode: inode being audited
1408 * When open() is called on an existing object with the O_CREAT flag, the inode
1409 * data audit initially collects is incorrect. This additional hook ensures
1410 * audit has the inode data for the actual object to be opened.
1412 void __audit_inode_update(const struct inode
*inode
)
1414 struct audit_context
*context
= current
->audit_context
;
1417 if (!context
->in_syscall
|| !inode
)
1420 if (context
->name_count
== 0) {
1421 context
->name_count
++;
1423 context
->ino_count
++;
1426 idx
= context
->name_count
- 1;
1428 audit_copy_inode(&context
->names
[idx
], inode
);
1432 * auditsc_get_stamp - get local copies of audit_context values
1433 * @ctx: audit_context for the task
1434 * @t: timespec to store time recorded in the audit_context
1435 * @serial: serial value that is recorded in the audit_context
1437 * Also sets the context as auditable.
1439 void auditsc_get_stamp(struct audit_context
*ctx
,
1440 struct timespec
*t
, unsigned int *serial
)
1443 ctx
->serial
= audit_serial();
1444 t
->tv_sec
= ctx
->ctime
.tv_sec
;
1445 t
->tv_nsec
= ctx
->ctime
.tv_nsec
;
1446 *serial
= ctx
->serial
;
1451 * audit_set_loginuid - set a task's audit_context loginuid
1452 * @task: task whose audit context is being modified
1453 * @loginuid: loginuid value
1457 * Called (set) from fs/proc/base.c::proc_loginuid_write().
1459 int audit_set_loginuid(struct task_struct
*task
, uid_t loginuid
)
1461 struct audit_context
*context
= task
->audit_context
;
1464 /* Only log if audit is enabled */
1465 if (context
->in_syscall
) {
1466 struct audit_buffer
*ab
;
1468 ab
= audit_log_start(NULL
, GFP_KERNEL
, AUDIT_LOGIN
);
1470 audit_log_format(ab
, "login pid=%d uid=%u "
1471 "old auid=%u new auid=%u",
1472 task
->pid
, task
->uid
,
1473 context
->loginuid
, loginuid
);
1477 context
->loginuid
= loginuid
;
1483 * audit_get_loginuid - get the loginuid for an audit_context
1484 * @ctx: the audit_context
1486 * Returns the context's loginuid or -1 if @ctx is NULL.
1488 uid_t
audit_get_loginuid(struct audit_context
*ctx
)
1490 return ctx
? ctx
->loginuid
: -1;
1493 EXPORT_SYMBOL(audit_get_loginuid
);
1496 * __audit_mq_open - record audit data for a POSIX MQ open
1499 * @u_attr: queue attributes
1501 * Returns 0 for success or NULL context or < 0 on error.
1503 int __audit_mq_open(int oflag
, mode_t mode
, struct mq_attr __user
*u_attr
)
1505 struct audit_aux_data_mq_open
*ax
;
1506 struct audit_context
*context
= current
->audit_context
;
1511 if (likely(!context
))
1514 ax
= kmalloc(sizeof(*ax
), GFP_ATOMIC
);
1518 if (u_attr
!= NULL
) {
1519 if (copy_from_user(&ax
->attr
, u_attr
, sizeof(ax
->attr
))) {
1524 memset(&ax
->attr
, 0, sizeof(ax
->attr
));
1529 ax
->d
.type
= AUDIT_MQ_OPEN
;
1530 ax
->d
.next
= context
->aux
;
1531 context
->aux
= (void *)ax
;
1536 * __audit_mq_timedsend - record audit data for a POSIX MQ timed send
1537 * @mqdes: MQ descriptor
1538 * @msg_len: Message length
1539 * @msg_prio: Message priority
1540 * @u_abs_timeout: Message timeout in absolute time
1542 * Returns 0 for success or NULL context or < 0 on error.
1544 int __audit_mq_timedsend(mqd_t mqdes
, size_t msg_len
, unsigned int msg_prio
,
1545 const struct timespec __user
*u_abs_timeout
)
1547 struct audit_aux_data_mq_sendrecv
*ax
;
1548 struct audit_context
*context
= current
->audit_context
;
1553 if (likely(!context
))
1556 ax
= kmalloc(sizeof(*ax
), GFP_ATOMIC
);
1560 if (u_abs_timeout
!= NULL
) {
1561 if (copy_from_user(&ax
->abs_timeout
, u_abs_timeout
, sizeof(ax
->abs_timeout
))) {
1566 memset(&ax
->abs_timeout
, 0, sizeof(ax
->abs_timeout
));
1569 ax
->msg_len
= msg_len
;
1570 ax
->msg_prio
= msg_prio
;
1572 ax
->d
.type
= AUDIT_MQ_SENDRECV
;
1573 ax
->d
.next
= context
->aux
;
1574 context
->aux
= (void *)ax
;
1579 * __audit_mq_timedreceive - record audit data for a POSIX MQ timed receive
1580 * @mqdes: MQ descriptor
1581 * @msg_len: Message length
1582 * @u_msg_prio: Message priority
1583 * @u_abs_timeout: Message timeout in absolute time
1585 * Returns 0 for success or NULL context or < 0 on error.
1587 int __audit_mq_timedreceive(mqd_t mqdes
, size_t msg_len
,
1588 unsigned int __user
*u_msg_prio
,
1589 const struct timespec __user
*u_abs_timeout
)
1591 struct audit_aux_data_mq_sendrecv
*ax
;
1592 struct audit_context
*context
= current
->audit_context
;
1597 if (likely(!context
))
1600 ax
= kmalloc(sizeof(*ax
), GFP_ATOMIC
);
1604 if (u_msg_prio
!= NULL
) {
1605 if (get_user(ax
->msg_prio
, u_msg_prio
)) {
1612 if (u_abs_timeout
!= NULL
) {
1613 if (copy_from_user(&ax
->abs_timeout
, u_abs_timeout
, sizeof(ax
->abs_timeout
))) {
1618 memset(&ax
->abs_timeout
, 0, sizeof(ax
->abs_timeout
));
1621 ax
->msg_len
= msg_len
;
1623 ax
->d
.type
= AUDIT_MQ_SENDRECV
;
1624 ax
->d
.next
= context
->aux
;
1625 context
->aux
= (void *)ax
;
1630 * __audit_mq_notify - record audit data for a POSIX MQ notify
1631 * @mqdes: MQ descriptor
1632 * @u_notification: Notification event
1634 * Returns 0 for success or NULL context or < 0 on error.
1637 int __audit_mq_notify(mqd_t mqdes
, const struct sigevent __user
*u_notification
)
1639 struct audit_aux_data_mq_notify
*ax
;
1640 struct audit_context
*context
= current
->audit_context
;
1645 if (likely(!context
))
1648 ax
= kmalloc(sizeof(*ax
), GFP_ATOMIC
);
1652 if (u_notification
!= NULL
) {
1653 if (copy_from_user(&ax
->notification
, u_notification
, sizeof(ax
->notification
))) {
1658 memset(&ax
->notification
, 0, sizeof(ax
->notification
));
1662 ax
->d
.type
= AUDIT_MQ_NOTIFY
;
1663 ax
->d
.next
= context
->aux
;
1664 context
->aux
= (void *)ax
;
1669 * __audit_mq_getsetattr - record audit data for a POSIX MQ get/set attribute
1670 * @mqdes: MQ descriptor
1673 * Returns 0 for success or NULL context or < 0 on error.
1675 int __audit_mq_getsetattr(mqd_t mqdes
, struct mq_attr
*mqstat
)
1677 struct audit_aux_data_mq_getsetattr
*ax
;
1678 struct audit_context
*context
= current
->audit_context
;
1683 if (likely(!context
))
1686 ax
= kmalloc(sizeof(*ax
), GFP_ATOMIC
);
1691 ax
->mqstat
= *mqstat
;
1693 ax
->d
.type
= AUDIT_MQ_GETSETATTR
;
1694 ax
->d
.next
= context
->aux
;
1695 context
->aux
= (void *)ax
;
1700 * audit_ipc_obj - record audit data for ipc object
1701 * @ipcp: ipc permissions
1703 * Returns 0 for success or NULL context or < 0 on error.
1705 int __audit_ipc_obj(struct kern_ipc_perm
*ipcp
)
1707 struct audit_aux_data_ipcctl
*ax
;
1708 struct audit_context
*context
= current
->audit_context
;
1710 ax
= kmalloc(sizeof(*ax
), GFP_ATOMIC
);
1714 ax
->uid
= ipcp
->uid
;
1715 ax
->gid
= ipcp
->gid
;
1716 ax
->mode
= ipcp
->mode
;
1717 selinux_get_ipc_sid(ipcp
, &ax
->osid
);
1719 ax
->d
.type
= AUDIT_IPC
;
1720 ax
->d
.next
= context
->aux
;
1721 context
->aux
= (void *)ax
;
1726 * audit_ipc_set_perm - record audit data for new ipc permissions
1727 * @qbytes: msgq bytes
1728 * @uid: msgq user id
1729 * @gid: msgq group id
1730 * @mode: msgq mode (permissions)
1732 * Returns 0 for success or NULL context or < 0 on error.
1734 int __audit_ipc_set_perm(unsigned long qbytes
, uid_t uid
, gid_t gid
, mode_t mode
)
1736 struct audit_aux_data_ipcctl
*ax
;
1737 struct audit_context
*context
= current
->audit_context
;
1739 ax
= kmalloc(sizeof(*ax
), GFP_ATOMIC
);
1743 ax
->qbytes
= qbytes
;
1748 ax
->d
.type
= AUDIT_IPC_SET_PERM
;
1749 ax
->d
.next
= context
->aux
;
1750 context
->aux
= (void *)ax
;
1754 int audit_bprm(struct linux_binprm
*bprm
)
1756 struct audit_aux_data_execve
*ax
;
1757 struct audit_context
*context
= current
->audit_context
;
1758 unsigned long p
, next
;
1761 if (likely(!audit_enabled
|| !context
|| context
->dummy
))
1764 ax
= kmalloc(sizeof(*ax
) + PAGE_SIZE
* MAX_ARG_PAGES
- bprm
->p
,
1769 ax
->argc
= bprm
->argc
;
1770 ax
->envc
= bprm
->envc
;
1771 for (p
= bprm
->p
, to
= ax
->mem
; p
< MAX_ARG_PAGES
*PAGE_SIZE
; p
= next
) {
1772 struct page
*page
= bprm
->page
[p
/ PAGE_SIZE
];
1773 void *kaddr
= kmap(page
);
1774 next
= (p
+ PAGE_SIZE
) & ~(PAGE_SIZE
- 1);
1775 memcpy(to
, kaddr
+ (p
& (PAGE_SIZE
- 1)), next
- p
);
1780 ax
->d
.type
= AUDIT_EXECVE
;
1781 ax
->d
.next
= context
->aux
;
1782 context
->aux
= (void *)ax
;
1788 * audit_socketcall - record audit data for sys_socketcall
1789 * @nargs: number of args
1792 * Returns 0 for success or NULL context or < 0 on error.
1794 int audit_socketcall(int nargs
, unsigned long *args
)
1796 struct audit_aux_data_socketcall
*ax
;
1797 struct audit_context
*context
= current
->audit_context
;
1799 if (likely(!context
|| context
->dummy
))
1802 ax
= kmalloc(sizeof(*ax
) + nargs
* sizeof(unsigned long), GFP_KERNEL
);
1807 memcpy(ax
->args
, args
, nargs
* sizeof(unsigned long));
1809 ax
->d
.type
= AUDIT_SOCKETCALL
;
1810 ax
->d
.next
= context
->aux
;
1811 context
->aux
= (void *)ax
;
1816 * audit_sockaddr - record audit data for sys_bind, sys_connect, sys_sendto
1817 * @len: data length in user space
1818 * @a: data address in kernel space
1820 * Returns 0 for success or NULL context or < 0 on error.
1822 int audit_sockaddr(int len
, void *a
)
1824 struct audit_aux_data_sockaddr
*ax
;
1825 struct audit_context
*context
= current
->audit_context
;
1827 if (likely(!context
|| context
->dummy
))
1830 ax
= kmalloc(sizeof(*ax
) + len
, GFP_KERNEL
);
1835 memcpy(ax
->a
, a
, len
);
1837 ax
->d
.type
= AUDIT_SOCKADDR
;
1838 ax
->d
.next
= context
->aux
;
1839 context
->aux
= (void *)ax
;
1844 * audit_avc_path - record the granting or denial of permissions
1845 * @dentry: dentry to record
1846 * @mnt: mnt to record
1848 * Returns 0 for success or NULL context or < 0 on error.
1850 * Called from security/selinux/avc.c::avc_audit()
1852 int audit_avc_path(struct dentry
*dentry
, struct vfsmount
*mnt
)
1854 struct audit_aux_data_path
*ax
;
1855 struct audit_context
*context
= current
->audit_context
;
1857 if (likely(!context
))
1860 ax
= kmalloc(sizeof(*ax
), GFP_ATOMIC
);
1864 ax
->dentry
= dget(dentry
);
1865 ax
->mnt
= mntget(mnt
);
1867 ax
->d
.type
= AUDIT_AVC_PATH
;
1868 ax
->d
.next
= context
->aux
;
1869 context
->aux
= (void *)ax
;
1874 * audit_signal_info - record signal info for shutting down audit subsystem
1875 * @sig: signal value
1876 * @t: task being signaled
1878 * If the audit subsystem is being terminated, record the task (pid)
1879 * and uid that is doing that.
1881 void __audit_signal_info(int sig
, struct task_struct
*t
)
1883 extern pid_t audit_sig_pid
;
1884 extern uid_t audit_sig_uid
;
1885 extern u32 audit_sig_sid
;
1887 if (sig
== SIGTERM
|| sig
== SIGHUP
|| sig
== SIGUSR1
) {
1888 struct task_struct
*tsk
= current
;
1889 struct audit_context
*ctx
= tsk
->audit_context
;
1890 audit_sig_pid
= tsk
->pid
;
1892 audit_sig_uid
= ctx
->loginuid
;
1894 audit_sig_uid
= tsk
->uid
;
1895 selinux_get_task_sid(tsk
, &audit_sig_sid
);