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_fd_pair {
174 struct audit_aux_data d;
178 struct audit_aux_data_path {
179 struct audit_aux_data d;
180 struct dentry *dentry;
181 struct vfsmount *mnt;
184 /* The per-task audit context. */
185 struct audit_context {
186 int dummy; /* must be the first element */
187 int in_syscall; /* 1 if task is in a syscall */
188 enum audit_state state;
189 unsigned int serial; /* serial number for record */
190 struct timespec ctime; /* time of syscall entry */
191 uid_t loginuid; /* login uid (identity) */
192 int major; /* syscall number */
193 unsigned long argv[4]; /* syscall arguments */
194 int return_valid; /* return code is valid */
195 long return_code;/* syscall return code */
196 int auditable; /* 1 if record should be written */
198 struct audit_names names[AUDIT_NAMES];
199 char * filterkey; /* key for rule that triggered record */
201 struct vfsmount * pwdmnt;
202 struct audit_context *previous; /* For nested syscalls */
203 struct audit_aux_data *aux;
205 /* Save things to print about task_struct */
207 uid_t uid, euid, suid, fsuid;
208 gid_t gid, egid, sgid, fsgid;
209 unsigned long personality;
221 #define ACC_MODE(x) ("\004\002\006\006"[(x)&O_ACCMODE])
222 static inline int open_arg(int flags, int mask)
224 int n = ACC_MODE(flags);
225 if (flags & (O_TRUNC | O_CREAT))
226 n |= AUDIT_PERM_WRITE;
230 static int audit_match_perm(struct audit_context *ctx, int mask)
232 unsigned n = ctx->major;
233 switch (audit_classify_syscall(ctx->arch, n)) {
235 if ((mask & AUDIT_PERM_WRITE) &&
236 audit_match_class(AUDIT_CLASS_WRITE, n))
238 if ((mask & AUDIT_PERM_READ) &&
239 audit_match_class(AUDIT_CLASS_READ, n))
241 if ((mask & AUDIT_PERM_ATTR) &&
242 audit_match_class(AUDIT_CLASS_CHATTR, n))
245 case 1: /* 32bit on biarch */
246 if ((mask & AUDIT_PERM_WRITE) &&
247 audit_match_class(AUDIT_CLASS_WRITE_32, n))
249 if ((mask & AUDIT_PERM_READ) &&
250 audit_match_class(AUDIT_CLASS_READ_32, n))
252 if ((mask & AUDIT_PERM_ATTR) &&
253 audit_match_class(AUDIT_CLASS_CHATTR_32, n))
257 return mask & ACC_MODE(ctx->argv[1]);
259 return mask & ACC_MODE(ctx->argv[2]);
260 case 4: /* socketcall */
261 return ((mask & AUDIT_PERM_WRITE) && ctx->argv[0] == SYS_BIND);
263 return mask & AUDIT_PERM_EXEC;
269 /* Determine if any context name data matches a rule's watch data */
270 /* Compare a task_struct with an audit_rule. Return 1 on match, 0
272 static int audit_filter_rules(struct task_struct *tsk,
273 struct audit_krule *rule,
274 struct audit_context *ctx,
275 struct audit_names *name,
276 enum audit_state *state)
278 int i, j, need_sid = 1;
281 for (i = 0; i < rule->field_count; i++) {
282 struct audit_field *f = &rule->fields[i];
287 result = audit_comparator(tsk->pid, f->op, f->val);
292 ctx->ppid = sys_getppid();
293 result = audit_comparator(ctx->ppid, f->op, f->val);
297 result = audit_comparator(tsk->uid, f->op, f->val);
300 result = audit_comparator(tsk->euid, f->op, f->val);
303 result = audit_comparator(tsk->suid, f->op, f->val);
306 result = audit_comparator(tsk->fsuid, f->op, f->val);
309 result = audit_comparator(tsk->gid, f->op, f->val);
312 result = audit_comparator(tsk->egid, f->op, f->val);
315 result = audit_comparator(tsk->sgid, f->op, f->val);
318 result = audit_comparator(tsk->fsgid, f->op, f->val);
321 result = audit_comparator(tsk->personality, f->op, f->val);
325 result = audit_comparator(ctx->arch, f->op, f->val);
329 if (ctx && ctx->return_valid)
330 result = audit_comparator(ctx->return_code, f->op, f->val);
333 if (ctx && ctx->return_valid) {
335 result = audit_comparator(ctx->return_valid, f->op, AUDITSC_SUCCESS);
337 result = audit_comparator(ctx->return_valid, f->op, AUDITSC_FAILURE);
342 result = audit_comparator(MAJOR(name->dev),
345 for (j = 0; j < ctx->name_count; j++) {
346 if (audit_comparator(MAJOR(ctx->names[j].dev), f->op, f->val)) {
355 result = audit_comparator(MINOR(name->dev),
358 for (j = 0; j < ctx->name_count; j++) {
359 if (audit_comparator(MINOR(ctx->names[j].dev), f->op, f->val)) {
368 result = (name->ino == f->val);
370 for (j = 0; j < ctx->name_count; j++) {
371 if (audit_comparator(ctx->names[j].ino, f->op, f->val)) {
379 if (name && rule->watch->ino != (unsigned long)-1)
380 result = (name->dev == rule->watch->dev &&
381 name->ino == rule->watch->ino);
386 result = audit_comparator(ctx->loginuid, f->op, f->val);
388 case AUDIT_SUBJ_USER:
389 case AUDIT_SUBJ_ROLE:
390 case AUDIT_SUBJ_TYPE:
393 /* NOTE: this may return negative values indicating
394 a temporary error. We simply treat this as a
395 match for now to avoid losing information that
396 may be wanted. An error message will also be
400 selinux_get_task_sid(tsk, &sid);
403 result = selinux_audit_rule_match(sid, f->type,
412 case AUDIT_OBJ_LEV_LOW:
413 case AUDIT_OBJ_LEV_HIGH:
414 /* The above note for AUDIT_SUBJ_USER...AUDIT_SUBJ_CLR
417 /* Find files that match */
419 result = selinux_audit_rule_match(
420 name->osid, f->type, f->op,
423 for (j = 0; j < ctx->name_count; j++) {
424 if (selinux_audit_rule_match(
433 /* Find ipc objects that match */
435 struct audit_aux_data *aux;
436 for (aux = ctx->aux; aux;
438 if (aux->type == AUDIT_IPC) {
439 struct audit_aux_data_ipcctl *axi = (void *)aux;
440 if (selinux_audit_rule_match(axi->osid, f->type, f->op, f->se_rule, ctx)) {
454 result = audit_comparator(ctx->argv[f->type-AUDIT_ARG0], f->op, f->val);
456 case AUDIT_FILTERKEY:
457 /* ignore this field for filtering */
461 result = audit_match_perm(ctx, f->val);
469 ctx->filterkey = kstrdup(rule->filterkey, GFP_ATOMIC);
470 switch (rule->action) {
471 case AUDIT_NEVER: *state = AUDIT_DISABLED; break;
472 case AUDIT_ALWAYS: *state = AUDIT_RECORD_CONTEXT; break;
477 /* At process creation time, we can determine if system-call auditing is
478 * completely disabled for this task. Since we only have the task
479 * structure at this point, we can only check uid and gid.
481 static enum audit_state audit_filter_task(struct task_struct *tsk)
483 struct audit_entry *e;
484 enum audit_state state;
487 list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_TASK], list) {
488 if (audit_filter_rules(tsk, &e->rule, NULL, NULL, &state)) {
494 return AUDIT_BUILD_CONTEXT;
497 /* At syscall entry and exit time, this filter is called if the
498 * audit_state is not low enough that auditing cannot take place, but is
499 * also not high enough that we already know we have to write an audit
500 * record (i.e., the state is AUDIT_SETUP_CONTEXT or AUDIT_BUILD_CONTEXT).
502 static enum audit_state audit_filter_syscall(struct task_struct *tsk,
503 struct audit_context *ctx,
504 struct list_head *list)
506 struct audit_entry *e;
507 enum audit_state state;
509 if (audit_pid && tsk->tgid == audit_pid)
510 return AUDIT_DISABLED;
513 if (!list_empty(list)) {
514 int word = AUDIT_WORD(ctx->major);
515 int bit = AUDIT_BIT(ctx->major);
517 list_for_each_entry_rcu(e, list, list) {
518 if ((e->rule.mask[word] & bit) == bit &&
519 audit_filter_rules(tsk, &e->rule, ctx, NULL,
527 return AUDIT_BUILD_CONTEXT;
530 /* At syscall exit time, this filter is called if any audit_names[] have been
531 * collected during syscall processing. We only check rules in sublists at hash
532 * buckets applicable to the inode numbers in audit_names[].
533 * Regarding audit_state, same rules apply as for audit_filter_syscall().
535 enum audit_state audit_filter_inodes(struct task_struct *tsk,
536 struct audit_context *ctx)
539 struct audit_entry *e;
540 enum audit_state state;
542 if (audit_pid && tsk->tgid == audit_pid)
543 return AUDIT_DISABLED;
546 for (i = 0; i < ctx->name_count; i++) {
547 int word = AUDIT_WORD(ctx->major);
548 int bit = AUDIT_BIT(ctx->major);
549 struct audit_names *n = &ctx->names[i];
550 int h = audit_hash_ino((u32)n->ino);
551 struct list_head *list = &audit_inode_hash[h];
553 if (list_empty(list))
556 list_for_each_entry_rcu(e, list, list) {
557 if ((e->rule.mask[word] & bit) == bit &&
558 audit_filter_rules(tsk, &e->rule, ctx, n, &state)) {
565 return AUDIT_BUILD_CONTEXT;
568 void audit_set_auditable(struct audit_context *ctx)
573 static inline struct audit_context *audit_get_context(struct task_struct *tsk,
577 struct audit_context *context = tsk->audit_context;
579 if (likely(!context))
581 context->return_valid = return_valid;
582 context->return_code = return_code;
584 if (context->in_syscall && !context->dummy && !context->auditable) {
585 enum audit_state state;
587 state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_EXIT]);
588 if (state == AUDIT_RECORD_CONTEXT) {
589 context->auditable = 1;
593 state = audit_filter_inodes(tsk, context);
594 if (state == AUDIT_RECORD_CONTEXT)
595 context->auditable = 1;
601 tsk->audit_context = NULL;
605 static inline void audit_free_names(struct audit_context *context)
610 if (context->auditable
611 ||context->put_count + context->ino_count != context->name_count) {
612 printk(KERN_ERR "%s:%d(:%d): major=%d in_syscall=%d"
613 " name_count=%d put_count=%d"
614 " ino_count=%d [NOT freeing]\n",
616 context->serial, context->major, context->in_syscall,
617 context->name_count, context->put_count,
619 for (i = 0; i < context->name_count; i++) {
620 printk(KERN_ERR "names[%d] = %p = %s\n", i,
621 context->names[i].name,
622 context->names[i].name ?: "(null)");
629 context->put_count = 0;
630 context->ino_count = 0;
633 for (i = 0; i < context->name_count; i++) {
634 if (context->names[i].name && context->names[i].name_put)
635 __putname(context->names[i].name);
637 context->name_count = 0;
641 mntput(context->pwdmnt);
643 context->pwdmnt = NULL;
646 static inline void audit_free_aux(struct audit_context *context)
648 struct audit_aux_data *aux;
650 while ((aux = context->aux)) {
651 if (aux->type == AUDIT_AVC_PATH) {
652 struct audit_aux_data_path *axi = (void *)aux;
657 context->aux = aux->next;
662 static inline void audit_zero_context(struct audit_context *context,
663 enum audit_state state)
665 uid_t loginuid = context->loginuid;
667 memset(context, 0, sizeof(*context));
668 context->state = state;
669 context->loginuid = loginuid;
672 static inline struct audit_context *audit_alloc_context(enum audit_state state)
674 struct audit_context *context;
676 if (!(context = kmalloc(sizeof(*context), GFP_KERNEL)))
678 audit_zero_context(context, state);
683 * audit_alloc - allocate an audit context block for a task
686 * Filter on the task information and allocate a per-task audit context
687 * if necessary. Doing so turns on system call auditing for the
688 * specified task. This is called from copy_process, so no lock is
691 int audit_alloc(struct task_struct *tsk)
693 struct audit_context *context;
694 enum audit_state state;
696 if (likely(!audit_enabled))
697 return 0; /* Return if not auditing. */
699 state = audit_filter_task(tsk);
700 if (likely(state == AUDIT_DISABLED))
703 if (!(context = audit_alloc_context(state))) {
704 audit_log_lost("out of memory in audit_alloc");
708 /* Preserve login uid */
709 context->loginuid = -1;
710 if (current->audit_context)
711 context->loginuid = current->audit_context->loginuid;
713 tsk->audit_context = context;
714 set_tsk_thread_flag(tsk, TIF_SYSCALL_AUDIT);
718 static inline void audit_free_context(struct audit_context *context)
720 struct audit_context *previous;
724 previous = context->previous;
725 if (previous || (count && count < 10)) {
727 printk(KERN_ERR "audit(:%d): major=%d name_count=%d:"
728 " freeing multiple contexts (%d)\n",
729 context->serial, context->major,
730 context->name_count, count);
732 audit_free_names(context);
733 audit_free_aux(context);
734 kfree(context->filterkey);
739 printk(KERN_ERR "audit: freed %d contexts\n", count);
742 void audit_log_task_context(struct audit_buffer *ab)
749 selinux_get_task_sid(current, &sid);
753 error = selinux_sid_to_string(sid, &ctx, &len);
755 if (error != -EINVAL)
760 audit_log_format(ab, " subj=%s", ctx);
765 audit_panic("error in audit_log_task_context");
769 EXPORT_SYMBOL(audit_log_task_context);
771 static void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
773 char name[sizeof(tsk->comm)];
774 struct mm_struct *mm = tsk->mm;
775 struct vm_area_struct *vma;
779 get_task_comm(name, tsk);
780 audit_log_format(ab, " comm=");
781 audit_log_untrustedstring(ab, name);
784 down_read(&mm->mmap_sem);
787 if ((vma->vm_flags & VM_EXECUTABLE) &&
789 audit_log_d_path(ab, "exe=",
790 vma->vm_file->f_path.dentry,
791 vma->vm_file->f_path.mnt);
796 up_read(&mm->mmap_sem);
798 audit_log_task_context(ab);
801 static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
803 int i, call_panic = 0;
804 struct audit_buffer *ab;
805 struct audit_aux_data *aux;
809 context->pid = tsk->pid;
811 context->ppid = sys_getppid();
812 context->uid = tsk->uid;
813 context->gid = tsk->gid;
814 context->euid = tsk->euid;
815 context->suid = tsk->suid;
816 context->fsuid = tsk->fsuid;
817 context->egid = tsk->egid;
818 context->sgid = tsk->sgid;
819 context->fsgid = tsk->fsgid;
820 context->personality = tsk->personality;
822 ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
824 return; /* audit_panic has been called */
825 audit_log_format(ab, "arch=%x syscall=%d",
826 context->arch, context->major);
827 if (context->personality != PER_LINUX)
828 audit_log_format(ab, " per=%lx", context->personality);
829 if (context->return_valid)
830 audit_log_format(ab, " success=%s exit=%ld",
831 (context->return_valid==AUDITSC_SUCCESS)?"yes":"no",
832 context->return_code);
834 mutex_lock(&tty_mutex);
835 read_lock(&tasklist_lock);
836 if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name)
837 tty = tsk->signal->tty->name;
840 read_unlock(&tasklist_lock);
842 " a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
843 " ppid=%d pid=%d auid=%u uid=%u gid=%u"
844 " euid=%u suid=%u fsuid=%u"
845 " egid=%u sgid=%u fsgid=%u tty=%s",
856 context->euid, context->suid, context->fsuid,
857 context->egid, context->sgid, context->fsgid, tty);
859 mutex_unlock(&tty_mutex);
861 audit_log_task_info(ab, tsk);
862 if (context->filterkey) {
863 audit_log_format(ab, " key=");
864 audit_log_untrustedstring(ab, context->filterkey);
866 audit_log_format(ab, " key=(null)");
869 for (aux = context->aux; aux; aux = aux->next) {
871 ab = audit_log_start(context, GFP_KERNEL, aux->type);
873 continue; /* audit_panic has been called */
876 case AUDIT_MQ_OPEN: {
877 struct audit_aux_data_mq_open *axi = (void *)aux;
879 "oflag=0x%x mode=%#o mq_flags=0x%lx mq_maxmsg=%ld "
880 "mq_msgsize=%ld mq_curmsgs=%ld",
881 axi->oflag, axi->mode, axi->attr.mq_flags,
882 axi->attr.mq_maxmsg, axi->attr.mq_msgsize,
883 axi->attr.mq_curmsgs);
886 case AUDIT_MQ_SENDRECV: {
887 struct audit_aux_data_mq_sendrecv *axi = (void *)aux;
889 "mqdes=%d msg_len=%zd msg_prio=%u "
890 "abs_timeout_sec=%ld abs_timeout_nsec=%ld",
891 axi->mqdes, axi->msg_len, axi->msg_prio,
892 axi->abs_timeout.tv_sec, axi->abs_timeout.tv_nsec);
895 case AUDIT_MQ_NOTIFY: {
896 struct audit_aux_data_mq_notify *axi = (void *)aux;
898 "mqdes=%d sigev_signo=%d",
900 axi->notification.sigev_signo);
903 case AUDIT_MQ_GETSETATTR: {
904 struct audit_aux_data_mq_getsetattr *axi = (void *)aux;
906 "mqdes=%d mq_flags=0x%lx mq_maxmsg=%ld mq_msgsize=%ld "
909 axi->mqstat.mq_flags, axi->mqstat.mq_maxmsg,
910 axi->mqstat.mq_msgsize, axi->mqstat.mq_curmsgs);
914 struct audit_aux_data_ipcctl *axi = (void *)aux;
916 "ouid=%u ogid=%u mode=%x",
917 axi->uid, axi->gid, axi->mode);
918 if (axi->osid != 0) {
921 if (selinux_sid_to_string(
922 axi->osid, &ctx, &len)) {
923 audit_log_format(ab, " osid=%u",
927 audit_log_format(ab, " obj=%s", ctx);
932 case AUDIT_IPC_SET_PERM: {
933 struct audit_aux_data_ipcctl *axi = (void *)aux;
935 "qbytes=%lx ouid=%u ogid=%u mode=%x",
936 axi->qbytes, axi->uid, axi->gid, axi->mode);
940 struct audit_aux_data_execve *axi = (void *)aux;
943 for (i = 0, p = axi->mem; i < axi->argc; i++) {
944 audit_log_format(ab, "a%d=", i);
945 p = audit_log_untrustedstring(ab, p);
946 audit_log_format(ab, "\n");
950 case AUDIT_SOCKETCALL: {
952 struct audit_aux_data_socketcall *axs = (void *)aux;
953 audit_log_format(ab, "nargs=%d", axs->nargs);
954 for (i=0; i<axs->nargs; i++)
955 audit_log_format(ab, " a%d=%lx", i, axs->args[i]);
958 case AUDIT_SOCKADDR: {
959 struct audit_aux_data_sockaddr *axs = (void *)aux;
961 audit_log_format(ab, "saddr=");
962 audit_log_hex(ab, axs->a, axs->len);
965 case AUDIT_AVC_PATH: {
966 struct audit_aux_data_path *axi = (void *)aux;
967 audit_log_d_path(ab, "path=", axi->dentry, axi->mnt);
970 case AUDIT_FD_PAIR: {
971 struct audit_aux_data_fd_pair *axs = (void *)aux;
972 audit_log_format(ab, "fd0=%d fd1=%d", axs->fd[0], axs->fd[1]);
979 if (context->target_pid) {
980 ab =audit_log_start(context, GFP_KERNEL, AUDIT_OBJ_PID);
984 if (selinux_sid_to_string(context->target_sid,
989 audit_log_format(ab, "opid=%d obj=%s",
990 context->target_pid, t);
996 if (context->pwd && context->pwdmnt) {
997 ab = audit_log_start(context, GFP_KERNEL, AUDIT_CWD);
999 audit_log_d_path(ab, "cwd=", context->pwd, context->pwdmnt);
1003 for (i = 0; i < context->name_count; i++) {
1004 struct audit_names *n = &context->names[i];
1006 ab = audit_log_start(context, GFP_KERNEL, AUDIT_PATH);
1008 continue; /* audit_panic has been called */
1010 audit_log_format(ab, "item=%d", i);
1013 switch(n->name_len) {
1014 case AUDIT_NAME_FULL:
1015 /* log the full path */
1016 audit_log_format(ab, " name=");
1017 audit_log_untrustedstring(ab, n->name);
1020 /* name was specified as a relative path and the
1021 * directory component is the cwd */
1022 audit_log_d_path(ab, " name=", context->pwd,
1026 /* log the name's directory component */
1027 audit_log_format(ab, " name=");
1028 audit_log_n_untrustedstring(ab, n->name_len,
1032 audit_log_format(ab, " name=(null)");
1034 if (n->ino != (unsigned long)-1) {
1035 audit_log_format(ab, " inode=%lu"
1036 " dev=%02x:%02x mode=%#o"
1037 " ouid=%u ogid=%u rdev=%02x:%02x",
1050 if (selinux_sid_to_string(
1051 n->osid, &ctx, &len)) {
1052 audit_log_format(ab, " osid=%u", n->osid);
1055 audit_log_format(ab, " obj=%s", ctx);
1062 audit_panic("error converting sid to string");
1066 * audit_free - free a per-task audit context
1067 * @tsk: task whose audit context block to free
1069 * Called from copy_process and do_exit
1071 void audit_free(struct task_struct *tsk)
1073 struct audit_context *context;
1075 context = audit_get_context(tsk, 0, 0);
1076 if (likely(!context))
1079 /* Check for system calls that do not go through the exit
1080 * function (e.g., exit_group), then free context block.
1081 * We use GFP_ATOMIC here because we might be doing this
1082 * in the context of the idle thread */
1083 /* that can happen only if we are called from do_exit() */
1084 if (context->in_syscall && context->auditable)
1085 audit_log_exit(context, tsk);
1087 audit_free_context(context);
1091 * audit_syscall_entry - fill in an audit record at syscall entry
1092 * @tsk: task being audited
1093 * @arch: architecture type
1094 * @major: major syscall type (function)
1095 * @a1: additional syscall register 1
1096 * @a2: additional syscall register 2
1097 * @a3: additional syscall register 3
1098 * @a4: additional syscall register 4
1100 * Fill in audit context at syscall entry. This only happens if the
1101 * audit context was created when the task was created and the state or
1102 * filters demand the audit context be built. If the state from the
1103 * per-task filter or from the per-syscall filter is AUDIT_RECORD_CONTEXT,
1104 * then the record will be written at syscall exit time (otherwise, it
1105 * will only be written if another part of the kernel requests that it
1108 void audit_syscall_entry(int arch, int major,
1109 unsigned long a1, unsigned long a2,
1110 unsigned long a3, unsigned long a4)
1112 struct task_struct *tsk = current;
1113 struct audit_context *context = tsk->audit_context;
1114 enum audit_state state;
1119 * This happens only on certain architectures that make system
1120 * calls in kernel_thread via the entry.S interface, instead of
1121 * with direct calls. (If you are porting to a new
1122 * architecture, hitting this condition can indicate that you
1123 * got the _exit/_leave calls backward in entry.S.)
1127 * ppc64 yes (see arch/powerpc/platforms/iseries/misc.S)
1129 * This also happens with vm86 emulation in a non-nested manner
1130 * (entries without exits), so this case must be caught.
1132 if (context->in_syscall) {
1133 struct audit_context *newctx;
1137 "audit(:%d) pid=%d in syscall=%d;"
1138 " entering syscall=%d\n",
1139 context->serial, tsk->pid, context->major, major);
1141 newctx = audit_alloc_context(context->state);
1143 newctx->previous = context;
1145 tsk->audit_context = newctx;
1147 /* If we can't alloc a new context, the best we
1148 * can do is to leak memory (any pending putname
1149 * will be lost). The only other alternative is
1150 * to abandon auditing. */
1151 audit_zero_context(context, context->state);
1154 BUG_ON(context->in_syscall || context->name_count);
1159 context->arch = arch;
1160 context->major = major;
1161 context->argv[0] = a1;
1162 context->argv[1] = a2;
1163 context->argv[2] = a3;
1164 context->argv[3] = a4;
1166 state = context->state;
1167 context->dummy = !audit_n_rules;
1168 if (!context->dummy && (state == AUDIT_SETUP_CONTEXT || state == AUDIT_BUILD_CONTEXT))
1169 state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_ENTRY]);
1170 if (likely(state == AUDIT_DISABLED))
1173 context->serial = 0;
1174 context->ctime = CURRENT_TIME;
1175 context->in_syscall = 1;
1176 context->auditable = !!(state == AUDIT_RECORD_CONTEXT);
1181 * audit_syscall_exit - deallocate audit context after a system call
1182 * @tsk: task being audited
1183 * @valid: success/failure flag
1184 * @return_code: syscall return value
1186 * Tear down after system call. If the audit context has been marked as
1187 * auditable (either because of the AUDIT_RECORD_CONTEXT state from
1188 * filtering, or because some other part of the kernel write an audit
1189 * message), then write out the syscall information. In call cases,
1190 * free the names stored from getname().
1192 void audit_syscall_exit(int valid, long return_code)
1194 struct task_struct *tsk = current;
1195 struct audit_context *context;
1197 context = audit_get_context(tsk, valid, return_code);
1199 if (likely(!context))
1202 if (context->in_syscall && context->auditable)
1203 audit_log_exit(context, tsk);
1205 context->in_syscall = 0;
1206 context->auditable = 0;
1208 if (context->previous) {
1209 struct audit_context *new_context = context->previous;
1210 context->previous = NULL;
1211 audit_free_context(context);
1212 tsk->audit_context = new_context;
1214 audit_free_names(context);
1215 audit_free_aux(context);
1216 context->target_pid = 0;
1217 kfree(context->filterkey);
1218 context->filterkey = NULL;
1219 tsk->audit_context = context;
1224 * audit_getname - add a name to the list
1225 * @name: name to add
1227 * Add a name to the list of audit names for this context.
1228 * Called from fs/namei.c:getname().
1230 void __audit_getname(const char *name)
1232 struct audit_context *context = current->audit_context;
1234 if (IS_ERR(name) || !name)
1237 if (!context->in_syscall) {
1238 #if AUDIT_DEBUG == 2
1239 printk(KERN_ERR "%s:%d(:%d): ignoring getname(%p)\n",
1240 __FILE__, __LINE__, context->serial, name);
1245 BUG_ON(context->name_count >= AUDIT_NAMES);
1246 context->names[context->name_count].name = name;
1247 context->names[context->name_count].name_len = AUDIT_NAME_FULL;
1248 context->names[context->name_count].name_put = 1;
1249 context->names[context->name_count].ino = (unsigned long)-1;
1250 ++context->name_count;
1251 if (!context->pwd) {
1252 read_lock(¤t->fs->lock);
1253 context->pwd = dget(current->fs->pwd);
1254 context->pwdmnt = mntget(current->fs->pwdmnt);
1255 read_unlock(¤t->fs->lock);
1260 /* audit_putname - intercept a putname request
1261 * @name: name to intercept and delay for putname
1263 * If we have stored the name from getname in the audit context,
1264 * then we delay the putname until syscall exit.
1265 * Called from include/linux/fs.h:putname().
1267 void audit_putname(const char *name)
1269 struct audit_context *context = current->audit_context;
1272 if (!context->in_syscall) {
1273 #if AUDIT_DEBUG == 2
1274 printk(KERN_ERR "%s:%d(:%d): __putname(%p)\n",
1275 __FILE__, __LINE__, context->serial, name);
1276 if (context->name_count) {
1278 for (i = 0; i < context->name_count; i++)
1279 printk(KERN_ERR "name[%d] = %p = %s\n", i,
1280 context->names[i].name,
1281 context->names[i].name ?: "(null)");
1288 ++context->put_count;
1289 if (context->put_count > context->name_count) {
1290 printk(KERN_ERR "%s:%d(:%d): major=%d"
1291 " in_syscall=%d putname(%p) name_count=%d"
1294 context->serial, context->major,
1295 context->in_syscall, name, context->name_count,
1296 context->put_count);
1303 /* Copy inode data into an audit_names. */
1304 static void audit_copy_inode(struct audit_names *name, const struct inode *inode)
1306 name->ino = inode->i_ino;
1307 name->dev = inode->i_sb->s_dev;
1308 name->mode = inode->i_mode;
1309 name->uid = inode->i_uid;
1310 name->gid = inode->i_gid;
1311 name->rdev = inode->i_rdev;
1312 selinux_get_inode_sid(inode, &name->osid);
1316 * audit_inode - store the inode and device from a lookup
1317 * @name: name being audited
1318 * @inode: inode being audited
1320 * Called from fs/namei.c:path_lookup().
1322 void __audit_inode(const char *name, const struct inode *inode)
1325 struct audit_context *context = current->audit_context;
1327 if (!context->in_syscall)
1329 if (context->name_count
1330 && context->names[context->name_count-1].name
1331 && context->names[context->name_count-1].name == name)
1332 idx = context->name_count - 1;
1333 else if (context->name_count > 1
1334 && context->names[context->name_count-2].name
1335 && context->names[context->name_count-2].name == name)
1336 idx = context->name_count - 2;
1338 /* FIXME: how much do we care about inodes that have no
1339 * associated name? */
1340 if (context->name_count >= AUDIT_NAMES - AUDIT_NAMES_RESERVED)
1342 idx = context->name_count++;
1343 context->names[idx].name = NULL;
1345 ++context->ino_count;
1348 audit_copy_inode(&context->names[idx], inode);
1352 * audit_inode_child - collect inode info for created/removed objects
1353 * @dname: inode's dentry name
1354 * @inode: inode being audited
1355 * @parent: inode of dentry parent
1357 * For syscalls that create or remove filesystem objects, audit_inode
1358 * can only collect information for the filesystem object's parent.
1359 * This call updates the audit context with the child's information.
1360 * Syscalls that create a new filesystem object must be hooked after
1361 * the object is created. Syscalls that remove a filesystem object
1362 * must be hooked prior, in order to capture the target inode during
1363 * unsuccessful attempts.
1365 void __audit_inode_child(const char *dname, const struct inode *inode,
1366 const struct inode *parent)
1369 struct audit_context *context = current->audit_context;
1370 const char *found_name = NULL;
1373 if (!context->in_syscall)
1376 /* determine matching parent */
1378 goto update_context;
1379 for (idx = 0; idx < context->name_count; idx++)
1380 if (context->names[idx].ino == parent->i_ino) {
1381 const char *name = context->names[idx].name;
1386 if (audit_compare_dname_path(dname, name, &dirlen) == 0) {
1387 context->names[idx].name_len = dirlen;
1394 idx = context->name_count;
1395 if (context->name_count == AUDIT_NAMES) {
1396 printk(KERN_DEBUG "name_count maxed and losing %s\n",
1397 found_name ?: "(null)");
1400 context->name_count++;
1402 context->ino_count++;
1404 /* Re-use the name belonging to the slot for a matching parent directory.
1405 * All names for this context are relinquished in audit_free_names() */
1406 context->names[idx].name = found_name;
1407 context->names[idx].name_len = AUDIT_NAME_FULL;
1408 context->names[idx].name_put = 0; /* don't call __putname() */
1411 context->names[idx].ino = (unsigned long)-1;
1413 audit_copy_inode(&context->names[idx], inode);
1415 /* A parent was not found in audit_names, so copy the inode data for the
1416 * provided parent. */
1418 idx = context->name_count;
1419 if (context->name_count == AUDIT_NAMES) {
1421 "name_count maxed and losing parent inode data: dev=%02x:%02x, inode=%lu",
1422 MAJOR(parent->i_sb->s_dev),
1423 MINOR(parent->i_sb->s_dev),
1427 context->name_count++;
1429 context->ino_count++;
1431 audit_copy_inode(&context->names[idx], parent);
1436 * audit_inode_update - update inode info for last collected name
1437 * @inode: inode being audited
1439 * When open() is called on an existing object with the O_CREAT flag, the inode
1440 * data audit initially collects is incorrect. This additional hook ensures
1441 * audit has the inode data for the actual object to be opened.
1443 void __audit_inode_update(const struct inode *inode)
1445 struct audit_context *context = current->audit_context;
1448 if (!context->in_syscall || !inode)
1451 if (context->name_count == 0) {
1452 context->name_count++;
1454 context->ino_count++;
1457 idx = context->name_count - 1;
1459 audit_copy_inode(&context->names[idx], inode);
1463 * auditsc_get_stamp - get local copies of audit_context values
1464 * @ctx: audit_context for the task
1465 * @t: timespec to store time recorded in the audit_context
1466 * @serial: serial value that is recorded in the audit_context
1468 * Also sets the context as auditable.
1470 void auditsc_get_stamp(struct audit_context *ctx,
1471 struct timespec *t, unsigned int *serial)
1474 ctx->serial = audit_serial();
1475 t->tv_sec = ctx->ctime.tv_sec;
1476 t->tv_nsec = ctx->ctime.tv_nsec;
1477 *serial = ctx->serial;
1482 * audit_set_loginuid - set a task's audit_context loginuid
1483 * @task: task whose audit context is being modified
1484 * @loginuid: loginuid value
1488 * Called (set) from fs/proc/base.c::proc_loginuid_write().
1490 int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
1492 struct audit_context *context = task->audit_context;
1495 /* Only log if audit is enabled */
1496 if (context->in_syscall) {
1497 struct audit_buffer *ab;
1499 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_LOGIN);
1501 audit_log_format(ab, "login pid=%d uid=%u "
1502 "old auid=%u new auid=%u",
1503 task->pid, task->uid,
1504 context->loginuid, loginuid);
1508 context->loginuid = loginuid;
1514 * audit_get_loginuid - get the loginuid for an audit_context
1515 * @ctx: the audit_context
1517 * Returns the context's loginuid or -1 if @ctx is NULL.
1519 uid_t audit_get_loginuid(struct audit_context *ctx)
1521 return ctx ? ctx->loginuid : -1;
1524 EXPORT_SYMBOL(audit_get_loginuid);
1527 * __audit_mq_open - record audit data for a POSIX MQ open
1530 * @u_attr: queue attributes
1532 * Returns 0 for success or NULL context or < 0 on error.
1534 int __audit_mq_open(int oflag, mode_t mode, struct mq_attr __user *u_attr)
1536 struct audit_aux_data_mq_open *ax;
1537 struct audit_context *context = current->audit_context;
1542 if (likely(!context))
1545 ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
1549 if (u_attr != NULL) {
1550 if (copy_from_user(&ax->attr, u_attr, sizeof(ax->attr))) {
1555 memset(&ax->attr, 0, sizeof(ax->attr));
1560 ax->d.type = AUDIT_MQ_OPEN;
1561 ax->d.next = context->aux;
1562 context->aux = (void *)ax;
1567 * __audit_mq_timedsend - record audit data for a POSIX MQ timed send
1568 * @mqdes: MQ descriptor
1569 * @msg_len: Message length
1570 * @msg_prio: Message priority
1571 * @u_abs_timeout: Message timeout in absolute time
1573 * Returns 0 for success or NULL context or < 0 on error.
1575 int __audit_mq_timedsend(mqd_t mqdes, size_t msg_len, unsigned int msg_prio,
1576 const struct timespec __user *u_abs_timeout)
1578 struct audit_aux_data_mq_sendrecv *ax;
1579 struct audit_context *context = current->audit_context;
1584 if (likely(!context))
1587 ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
1591 if (u_abs_timeout != NULL) {
1592 if (copy_from_user(&ax->abs_timeout, u_abs_timeout, sizeof(ax->abs_timeout))) {
1597 memset(&ax->abs_timeout, 0, sizeof(ax->abs_timeout));
1600 ax->msg_len = msg_len;
1601 ax->msg_prio = msg_prio;
1603 ax->d.type = AUDIT_MQ_SENDRECV;
1604 ax->d.next = context->aux;
1605 context->aux = (void *)ax;
1610 * __audit_mq_timedreceive - record audit data for a POSIX MQ timed receive
1611 * @mqdes: MQ descriptor
1612 * @msg_len: Message length
1613 * @u_msg_prio: Message priority
1614 * @u_abs_timeout: Message timeout in absolute time
1616 * Returns 0 for success or NULL context or < 0 on error.
1618 int __audit_mq_timedreceive(mqd_t mqdes, size_t msg_len,
1619 unsigned int __user *u_msg_prio,
1620 const struct timespec __user *u_abs_timeout)
1622 struct audit_aux_data_mq_sendrecv *ax;
1623 struct audit_context *context = current->audit_context;
1628 if (likely(!context))
1631 ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
1635 if (u_msg_prio != NULL) {
1636 if (get_user(ax->msg_prio, u_msg_prio)) {
1643 if (u_abs_timeout != NULL) {
1644 if (copy_from_user(&ax->abs_timeout, u_abs_timeout, sizeof(ax->abs_timeout))) {
1649 memset(&ax->abs_timeout, 0, sizeof(ax->abs_timeout));
1652 ax->msg_len = msg_len;
1654 ax->d.type = AUDIT_MQ_SENDRECV;
1655 ax->d.next = context->aux;
1656 context->aux = (void *)ax;
1661 * __audit_mq_notify - record audit data for a POSIX MQ notify
1662 * @mqdes: MQ descriptor
1663 * @u_notification: Notification event
1665 * Returns 0 for success or NULL context or < 0 on error.
1668 int __audit_mq_notify(mqd_t mqdes, const struct sigevent __user *u_notification)
1670 struct audit_aux_data_mq_notify *ax;
1671 struct audit_context *context = current->audit_context;
1676 if (likely(!context))
1679 ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
1683 if (u_notification != NULL) {
1684 if (copy_from_user(&ax->notification, u_notification, sizeof(ax->notification))) {
1689 memset(&ax->notification, 0, sizeof(ax->notification));
1693 ax->d.type = AUDIT_MQ_NOTIFY;
1694 ax->d.next = context->aux;
1695 context->aux = (void *)ax;
1700 * __audit_mq_getsetattr - record audit data for a POSIX MQ get/set attribute
1701 * @mqdes: MQ descriptor
1704 * Returns 0 for success or NULL context or < 0 on error.
1706 int __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
1708 struct audit_aux_data_mq_getsetattr *ax;
1709 struct audit_context *context = current->audit_context;
1714 if (likely(!context))
1717 ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
1722 ax->mqstat = *mqstat;
1724 ax->d.type = AUDIT_MQ_GETSETATTR;
1725 ax->d.next = context->aux;
1726 context->aux = (void *)ax;
1731 * audit_ipc_obj - record audit data for ipc object
1732 * @ipcp: ipc permissions
1734 * Returns 0 for success or NULL context or < 0 on error.
1736 int __audit_ipc_obj(struct kern_ipc_perm *ipcp)
1738 struct audit_aux_data_ipcctl *ax;
1739 struct audit_context *context = current->audit_context;
1741 ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
1745 ax->uid = ipcp->uid;
1746 ax->gid = ipcp->gid;
1747 ax->mode = ipcp->mode;
1748 selinux_get_ipc_sid(ipcp, &ax->osid);
1750 ax->d.type = AUDIT_IPC;
1751 ax->d.next = context->aux;
1752 context->aux = (void *)ax;
1757 * audit_ipc_set_perm - record audit data for new ipc permissions
1758 * @qbytes: msgq bytes
1759 * @uid: msgq user id
1760 * @gid: msgq group id
1761 * @mode: msgq mode (permissions)
1763 * Returns 0 for success or NULL context or < 0 on error.
1765 int __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode)
1767 struct audit_aux_data_ipcctl *ax;
1768 struct audit_context *context = current->audit_context;
1770 ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
1774 ax->qbytes = qbytes;
1779 ax->d.type = AUDIT_IPC_SET_PERM;
1780 ax->d.next = context->aux;
1781 context->aux = (void *)ax;
1785 int audit_bprm(struct linux_binprm *bprm)
1787 struct audit_aux_data_execve *ax;
1788 struct audit_context *context = current->audit_context;
1789 unsigned long p, next;
1792 if (likely(!audit_enabled || !context || context->dummy))
1795 ax = kmalloc(sizeof(*ax) + PAGE_SIZE * MAX_ARG_PAGES - bprm->p,
1800 ax->argc = bprm->argc;
1801 ax->envc = bprm->envc;
1802 for (p = bprm->p, to = ax->mem; p < MAX_ARG_PAGES*PAGE_SIZE; p = next) {
1803 struct page *page = bprm->page[p / PAGE_SIZE];
1804 void *kaddr = kmap(page);
1805 next = (p + PAGE_SIZE) & ~(PAGE_SIZE - 1);
1806 memcpy(to, kaddr + (p & (PAGE_SIZE - 1)), next - p);
1811 ax->d.type = AUDIT_EXECVE;
1812 ax->d.next = context->aux;
1813 context->aux = (void *)ax;
1819 * audit_socketcall - record audit data for sys_socketcall
1820 * @nargs: number of args
1823 * Returns 0 for success or NULL context or < 0 on error.
1825 int audit_socketcall(int nargs, unsigned long *args)
1827 struct audit_aux_data_socketcall *ax;
1828 struct audit_context *context = current->audit_context;
1830 if (likely(!context || context->dummy))
1833 ax = kmalloc(sizeof(*ax) + nargs * sizeof(unsigned long), GFP_KERNEL);
1838 memcpy(ax->args, args, nargs * sizeof(unsigned long));
1840 ax->d.type = AUDIT_SOCKETCALL;
1841 ax->d.next = context->aux;
1842 context->aux = (void *)ax;
1847 * __audit_fd_pair - record audit data for pipe and socketpair
1848 * @fd1: the first file descriptor
1849 * @fd2: the second file descriptor
1851 * Returns 0 for success or NULL context or < 0 on error.
1853 int __audit_fd_pair(int fd1, int fd2)
1855 struct audit_context *context = current->audit_context;
1856 struct audit_aux_data_fd_pair *ax;
1858 if (likely(!context)) {
1862 ax = kmalloc(sizeof(*ax), GFP_KERNEL);
1870 ax->d.type = AUDIT_FD_PAIR;
1871 ax->d.next = context->aux;
1872 context->aux = (void *)ax;
1877 * audit_sockaddr - record audit data for sys_bind, sys_connect, sys_sendto
1878 * @len: data length in user space
1879 * @a: data address in kernel space
1881 * Returns 0 for success or NULL context or < 0 on error.
1883 int audit_sockaddr(int len, void *a)
1885 struct audit_aux_data_sockaddr *ax;
1886 struct audit_context *context = current->audit_context;
1888 if (likely(!context || context->dummy))
1891 ax = kmalloc(sizeof(*ax) + len, GFP_KERNEL);
1896 memcpy(ax->a, a, len);
1898 ax->d.type = AUDIT_SOCKADDR;
1899 ax->d.next = context->aux;
1900 context->aux = (void *)ax;
1904 void __audit_ptrace(struct task_struct *t)
1906 struct audit_context *context = current->audit_context;
1908 context->target_pid = t->pid;
1909 selinux_get_task_sid(t, &context->target_sid);
1913 * audit_avc_path - record the granting or denial of permissions
1914 * @dentry: dentry to record
1915 * @mnt: mnt to record
1917 * Returns 0 for success or NULL context or < 0 on error.
1919 * Called from security/selinux/avc.c::avc_audit()
1921 int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt)
1923 struct audit_aux_data_path *ax;
1924 struct audit_context *context = current->audit_context;
1926 if (likely(!context))
1929 ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
1933 ax->dentry = dget(dentry);
1934 ax->mnt = mntget(mnt);
1936 ax->d.type = AUDIT_AVC_PATH;
1937 ax->d.next = context->aux;
1938 context->aux = (void *)ax;
1943 * audit_signal_info - record signal info for shutting down audit subsystem
1944 * @sig: signal value
1945 * @t: task being signaled
1947 * If the audit subsystem is being terminated, record the task (pid)
1948 * and uid that is doing that.
1950 void __audit_signal_info(int sig, struct task_struct *t)
1952 extern pid_t audit_sig_pid;
1953 extern uid_t audit_sig_uid;
1954 extern u32 audit_sig_sid;
1956 if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1) {
1957 struct task_struct *tsk = current;
1958 struct audit_context *ctx = tsk->audit_context;
1959 audit_sig_pid = tsk->pid;
1961 audit_sig_uid = ctx->loginuid;
1963 audit_sig_uid = tsk->uid;
1964 selinux_get_task_sid(tsk, &audit_sig_sid);