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45#include <linux/init.h>
46#include <asm/types.h>
47#include <asm/atomic.h>
48#include <linux/fs.h>
49#include <linux/namei.h>
50#include <linux/mm.h>
51#include <linux/module.h>
52#include <linux/slab.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/binfmts.h>
66#include <linux/highmem.h>
67#include <linux/syscalls.h>
68#include <linux/capability.h>
69#include <linux/fs_struct.h>
70
71#include "audit.h"
72
73
74
75#define AUDIT_NAMES 20
76
77
78#define AUDIT_NAME_FULL -1
79
80
81#define MAX_EXECVE_AUDIT_LEN 7500
82
83
84int audit_n_rules;
85
86
87int audit_signals;
88
89struct audit_cap_data {
90 kernel_cap_t permitted;
91 kernel_cap_t inheritable;
92 union {
93 unsigned int fE;
94 kernel_cap_t effective;
95 };
96};
97
98
99
100
101
102
103struct audit_names {
104 const char *name;
105 int name_len;
106 unsigned name_put;
107 unsigned long ino;
108 dev_t dev;
109 umode_t mode;
110 uid_t uid;
111 gid_t gid;
112 dev_t rdev;
113 u32 osid;
114 struct audit_cap_data fcap;
115 unsigned int fcap_ver;
116};
117
118struct audit_aux_data {
119 struct audit_aux_data *next;
120 int type;
121};
122
123#define AUDIT_AUX_IPCPERM 0
124
125
126#define AUDIT_AUX_PIDS 16
127
128struct audit_aux_data_execve {
129 struct audit_aux_data d;
130 int argc;
131 int envc;
132 struct mm_struct *mm;
133};
134
135struct audit_aux_data_pids {
136 struct audit_aux_data d;
137 pid_t target_pid[AUDIT_AUX_PIDS];
138 uid_t target_auid[AUDIT_AUX_PIDS];
139 uid_t target_uid[AUDIT_AUX_PIDS];
140 unsigned int target_sessionid[AUDIT_AUX_PIDS];
141 u32 target_sid[AUDIT_AUX_PIDS];
142 char target_comm[AUDIT_AUX_PIDS][TASK_COMM_LEN];
143 int pid_count;
144};
145
146struct audit_aux_data_bprm_fcaps {
147 struct audit_aux_data d;
148 struct audit_cap_data fcap;
149 unsigned int fcap_ver;
150 struct audit_cap_data old_pcap;
151 struct audit_cap_data new_pcap;
152};
153
154struct audit_aux_data_capset {
155 struct audit_aux_data d;
156 pid_t pid;
157 struct audit_cap_data cap;
158};
159
160struct audit_tree_refs {
161 struct audit_tree_refs *next;
162 struct audit_chunk *c[31];
163};
164
165
166struct audit_context {
167 int dummy;
168 int in_syscall;
169 enum audit_state state, current_state;
170 unsigned int serial;
171 int major;
172 struct timespec ctime;
173 unsigned long argv[4];
174 long return_code;
175 u64 prio;
176 int return_valid;
177 int name_count;
178 struct audit_names names[AUDIT_NAMES];
179 char * filterkey;
180 struct path pwd;
181 struct audit_context *previous;
182 struct audit_aux_data *aux;
183 struct audit_aux_data *aux_pids;
184 struct sockaddr_storage *sockaddr;
185 size_t sockaddr_len;
186
187 pid_t pid, ppid;
188 uid_t uid, euid, suid, fsuid;
189 gid_t gid, egid, sgid, fsgid;
190 unsigned long personality;
191 int arch;
192
193 pid_t target_pid;
194 uid_t target_auid;
195 uid_t target_uid;
196 unsigned int target_sessionid;
197 u32 target_sid;
198 char target_comm[TASK_COMM_LEN];
199
200 struct audit_tree_refs *trees, *first_trees;
201 struct list_head killed_trees;
202 int tree_count;
203
204 int type;
205 union {
206 struct {
207 int nargs;
208 long args[6];
209 } socketcall;
210 struct {
211 uid_t uid;
212 gid_t gid;
213 mode_t mode;
214 u32 osid;
215 int has_perm;
216 uid_t perm_uid;
217 gid_t perm_gid;
218 mode_t perm_mode;
219 unsigned long qbytes;
220 } ipc;
221 struct {
222 mqd_t mqdes;
223 struct mq_attr mqstat;
224 } mq_getsetattr;
225 struct {
226 mqd_t mqdes;
227 int sigev_signo;
228 } mq_notify;
229 struct {
230 mqd_t mqdes;
231 size_t msg_len;
232 unsigned int msg_prio;
233 struct timespec abs_timeout;
234 } mq_sendrecv;
235 struct {
236 int oflag;
237 mode_t mode;
238 struct mq_attr attr;
239 } mq_open;
240 struct {
241 pid_t pid;
242 struct audit_cap_data cap;
243 } capset;
244 struct {
245 int fd;
246 int flags;
247 } mmap;
248 };
249 int fds[2];
250
251#if AUDIT_DEBUG
252 int put_count;
253 int ino_count;
254#endif
255};
256
257static inline int open_arg(int flags, int mask)
258{
259 int n = ACC_MODE(flags);
260 if (flags & (O_TRUNC | O_CREAT))
261 n |= AUDIT_PERM_WRITE;
262 return n & mask;
263}
264
265static int audit_match_perm(struct audit_context *ctx, int mask)
266{
267 unsigned n;
268 if (unlikely(!ctx))
269 return 0;
270 n = ctx->major;
271
272 switch (audit_classify_syscall(ctx->arch, n)) {
273 case 0:
274 if ((mask & AUDIT_PERM_WRITE) &&
275 audit_match_class(AUDIT_CLASS_WRITE, n))
276 return 1;
277 if ((mask & AUDIT_PERM_READ) &&
278 audit_match_class(AUDIT_CLASS_READ, n))
279 return 1;
280 if ((mask & AUDIT_PERM_ATTR) &&
281 audit_match_class(AUDIT_CLASS_CHATTR, n))
282 return 1;
283 return 0;
284 case 1:
285 if ((mask & AUDIT_PERM_WRITE) &&
286 audit_match_class(AUDIT_CLASS_WRITE_32, n))
287 return 1;
288 if ((mask & AUDIT_PERM_READ) &&
289 audit_match_class(AUDIT_CLASS_READ_32, n))
290 return 1;
291 if ((mask & AUDIT_PERM_ATTR) &&
292 audit_match_class(AUDIT_CLASS_CHATTR_32, n))
293 return 1;
294 return 0;
295 case 2:
296 return mask & ACC_MODE(ctx->argv[1]);
297 case 3:
298 return mask & ACC_MODE(ctx->argv[2]);
299 case 4:
300 return ((mask & AUDIT_PERM_WRITE) && ctx->argv[0] == SYS_BIND);
301 case 5:
302 return mask & AUDIT_PERM_EXEC;
303 default:
304 return 0;
305 }
306}
307
308static int audit_match_filetype(struct audit_context *ctx, int which)
309{
310 unsigned index = which & ~S_IFMT;
311 mode_t mode = which & S_IFMT;
312
313 if (unlikely(!ctx))
314 return 0;
315
316 if (index >= ctx->name_count)
317 return 0;
318 if (ctx->names[index].ino == -1)
319 return 0;
320 if ((ctx->names[index].mode ^ mode) & S_IFMT)
321 return 0;
322 return 1;
323}
324
325
326
327
328
329
330
331
332
333
334
335#ifdef CONFIG_AUDIT_TREE
336static void audit_set_auditable(struct audit_context *ctx)
337{
338 if (!ctx->prio) {
339 ctx->prio = 1;
340 ctx->current_state = AUDIT_RECORD_CONTEXT;
341 }
342}
343
344static int put_tree_ref(struct audit_context *ctx, struct audit_chunk *chunk)
345{
346 struct audit_tree_refs *p = ctx->trees;
347 int left = ctx->tree_count;
348 if (likely(left)) {
349 p->c[--left] = chunk;
350 ctx->tree_count = left;
351 return 1;
352 }
353 if (!p)
354 return 0;
355 p = p->next;
356 if (p) {
357 p->c[30] = chunk;
358 ctx->trees = p;
359 ctx->tree_count = 30;
360 return 1;
361 }
362 return 0;
363}
364
365static int grow_tree_refs(struct audit_context *ctx)
366{
367 struct audit_tree_refs *p = ctx->trees;
368 ctx->trees = kzalloc(sizeof(struct audit_tree_refs), GFP_KERNEL);
369 if (!ctx->trees) {
370 ctx->trees = p;
371 return 0;
372 }
373 if (p)
374 p->next = ctx->trees;
375 else
376 ctx->first_trees = ctx->trees;
377 ctx->tree_count = 31;
378 return 1;
379}
380#endif
381
382static void unroll_tree_refs(struct audit_context *ctx,
383 struct audit_tree_refs *p, int count)
384{
385#ifdef CONFIG_AUDIT_TREE
386 struct audit_tree_refs *q;
387 int n;
388 if (!p) {
389
390 p = ctx->first_trees;
391 count = 31;
392
393 if (!p)
394 return;
395 }
396 n = count;
397 for (q = p; q != ctx->trees; q = q->next, n = 31) {
398 while (n--) {
399 audit_put_chunk(q->c[n]);
400 q->c[n] = NULL;
401 }
402 }
403 while (n-- > ctx->tree_count) {
404 audit_put_chunk(q->c[n]);
405 q->c[n] = NULL;
406 }
407 ctx->trees = p;
408 ctx->tree_count = count;
409#endif
410}
411
412static void free_tree_refs(struct audit_context *ctx)
413{
414 struct audit_tree_refs *p, *q;
415 for (p = ctx->first_trees; p; p = q) {
416 q = p->next;
417 kfree(p);
418 }
419}
420
421static int match_tree_refs(struct audit_context *ctx, struct audit_tree *tree)
422{
423#ifdef CONFIG_AUDIT_TREE
424 struct audit_tree_refs *p;
425 int n;
426 if (!tree)
427 return 0;
428
429 for (p = ctx->first_trees; p != ctx->trees; p = p->next) {
430 for (n = 0; n < 31; n++)
431 if (audit_tree_match(p->c[n], tree))
432 return 1;
433 }
434
435 if (p) {
436 for (n = ctx->tree_count; n < 31; n++)
437 if (audit_tree_match(p->c[n], tree))
438 return 1;
439 }
440#endif
441 return 0;
442}
443
444
445
446
447static int audit_filter_rules(struct task_struct *tsk,
448 struct audit_krule *rule,
449 struct audit_context *ctx,
450 struct audit_names *name,
451 enum audit_state *state)
452{
453 const struct cred *cred = get_task_cred(tsk);
454 int i, j, need_sid = 1;
455 u32 sid;
456
457 for (i = 0; i < rule->field_count; i++) {
458 struct audit_field *f = &rule->fields[i];
459 int result = 0;
460
461 switch (f->type) {
462 case AUDIT_PID:
463 result = audit_comparator(tsk->pid, f->op, f->val);
464 break;
465 case AUDIT_PPID:
466 if (ctx) {
467 if (!ctx->ppid)
468 ctx->ppid = sys_getppid();
469 result = audit_comparator(ctx->ppid, f->op, f->val);
470 }
471 break;
472 case AUDIT_UID:
473 result = audit_comparator(cred->uid, f->op, f->val);
474 break;
475 case AUDIT_EUID:
476 result = audit_comparator(cred->euid, f->op, f->val);
477 break;
478 case AUDIT_SUID:
479 result = audit_comparator(cred->suid, f->op, f->val);
480 break;
481 case AUDIT_FSUID:
482 result = audit_comparator(cred->fsuid, f->op, f->val);
483 break;
484 case AUDIT_GID:
485 result = audit_comparator(cred->gid, f->op, f->val);
486 break;
487 case AUDIT_EGID:
488 result = audit_comparator(cred->egid, f->op, f->val);
489 break;
490 case AUDIT_SGID:
491 result = audit_comparator(cred->sgid, f->op, f->val);
492 break;
493 case AUDIT_FSGID:
494 result = audit_comparator(cred->fsgid, f->op, f->val);
495 break;
496 case AUDIT_PERS:
497 result = audit_comparator(tsk->personality, f->op, f->val);
498 break;
499 case AUDIT_ARCH:
500 if (ctx)
501 result = audit_comparator(ctx->arch, f->op, f->val);
502 break;
503
504 case AUDIT_EXIT:
505 if (ctx && ctx->return_valid)
506 result = audit_comparator(ctx->return_code, f->op, f->val);
507 break;
508 case AUDIT_SUCCESS:
509 if (ctx && ctx->return_valid) {
510 if (f->val)
511 result = audit_comparator(ctx->return_valid, f->op, AUDITSC_SUCCESS);
512 else
513 result = audit_comparator(ctx->return_valid, f->op, AUDITSC_FAILURE);
514 }
515 break;
516 case AUDIT_DEVMAJOR:
517 if (name)
518 result = audit_comparator(MAJOR(name->dev),
519 f->op, f->val);
520 else if (ctx) {
521 for (j = 0; j < ctx->name_count; j++) {
522 if (audit_comparator(MAJOR(ctx->names[j].dev), f->op, f->val)) {
523 ++result;
524 break;
525 }
526 }
527 }
528 break;
529 case AUDIT_DEVMINOR:
530 if (name)
531 result = audit_comparator(MINOR(name->dev),
532 f->op, f->val);
533 else if (ctx) {
534 for (j = 0; j < ctx->name_count; j++) {
535 if (audit_comparator(MINOR(ctx->names[j].dev), f->op, f->val)) {
536 ++result;
537 break;
538 }
539 }
540 }
541 break;
542 case AUDIT_INODE:
543 if (name)
544 result = (name->ino == f->val);
545 else if (ctx) {
546 for (j = 0; j < ctx->name_count; j++) {
547 if (audit_comparator(ctx->names[j].ino, f->op, f->val)) {
548 ++result;
549 break;
550 }
551 }
552 }
553 break;
554 case AUDIT_WATCH:
555 if (name)
556 result = audit_watch_compare(rule->watch, name->ino, name->dev);
557 break;
558 case AUDIT_DIR:
559 if (ctx)
560 result = match_tree_refs(ctx, rule->tree);
561 break;
562 case AUDIT_LOGINUID:
563 result = 0;
564 if (ctx)
565 result = audit_comparator(tsk->loginuid, f->op, f->val);
566 break;
567 case AUDIT_SUBJ_USER:
568 case AUDIT_SUBJ_ROLE:
569 case AUDIT_SUBJ_TYPE:
570 case AUDIT_SUBJ_SEN:
571 case AUDIT_SUBJ_CLR:
572
573
574
575
576
577 if (f->lsm_rule) {
578 if (need_sid) {
579 security_task_getsecid(tsk, &sid);
580 need_sid = 0;
581 }
582 result = security_audit_rule_match(sid, f->type,
583 f->op,
584 f->lsm_rule,
585 ctx);
586 }
587 break;
588 case AUDIT_OBJ_USER:
589 case AUDIT_OBJ_ROLE:
590 case AUDIT_OBJ_TYPE:
591 case AUDIT_OBJ_LEV_LOW:
592 case AUDIT_OBJ_LEV_HIGH:
593
594
595 if (f->lsm_rule) {
596
597 if (name) {
598 result = security_audit_rule_match(
599 name->osid, f->type, f->op,
600 f->lsm_rule, ctx);
601 } else if (ctx) {
602 for (j = 0; j < ctx->name_count; j++) {
603 if (security_audit_rule_match(
604 ctx->names[j].osid,
605 f->type, f->op,
606 f->lsm_rule, ctx)) {
607 ++result;
608 break;
609 }
610 }
611 }
612
613 if (!ctx || ctx->type != AUDIT_IPC)
614 break;
615 if (security_audit_rule_match(ctx->ipc.osid,
616 f->type, f->op,
617 f->lsm_rule, ctx))
618 ++result;
619 }
620 break;
621 case AUDIT_ARG0:
622 case AUDIT_ARG1:
623 case AUDIT_ARG2:
624 case AUDIT_ARG3:
625 if (ctx)
626 result = audit_comparator(ctx->argv[f->type-AUDIT_ARG0], f->op, f->val);
627 break;
628 case AUDIT_FILTERKEY:
629
630 result = 1;
631 break;
632 case AUDIT_PERM:
633 result = audit_match_perm(ctx, f->val);
634 break;
635 case AUDIT_FILETYPE:
636 result = audit_match_filetype(ctx, f->val);
637 break;
638 }
639
640 if (!result) {
641 put_cred(cred);
642 return 0;
643 }
644 }
645
646 if (ctx) {
647 if (rule->prio <= ctx->prio)
648 return 0;
649 if (rule->filterkey) {
650 kfree(ctx->filterkey);
651 ctx->filterkey = kstrdup(rule->filterkey, GFP_ATOMIC);
652 }
653 ctx->prio = rule->prio;
654 }
655 switch (rule->action) {
656 case AUDIT_NEVER: *state = AUDIT_DISABLED; break;
657 case AUDIT_ALWAYS: *state = AUDIT_RECORD_CONTEXT; break;
658 }
659 put_cred(cred);
660 return 1;
661}
662
663
664
665
666
667static enum audit_state audit_filter_task(struct task_struct *tsk, char **key)
668{
669 struct audit_entry *e;
670 enum audit_state state;
671
672 rcu_read_lock();
673 list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_TASK], list) {
674 if (audit_filter_rules(tsk, &e->rule, NULL, NULL, &state)) {
675 if (state == AUDIT_RECORD_CONTEXT)
676 *key = kstrdup(e->rule.filterkey, GFP_ATOMIC);
677 rcu_read_unlock();
678 return state;
679 }
680 }
681 rcu_read_unlock();
682 return AUDIT_BUILD_CONTEXT;
683}
684
685
686
687
688
689
690static enum audit_state audit_filter_syscall(struct task_struct *tsk,
691 struct audit_context *ctx,
692 struct list_head *list)
693{
694 struct audit_entry *e;
695 enum audit_state state;
696
697 if (audit_pid && tsk->tgid == audit_pid)
698 return AUDIT_DISABLED;
699
700 rcu_read_lock();
701 if (!list_empty(list)) {
702 int word = AUDIT_WORD(ctx->major);
703 int bit = AUDIT_BIT(ctx->major);
704
705 list_for_each_entry_rcu(e, list, list) {
706 if ((e->rule.mask[word] & bit) == bit &&
707 audit_filter_rules(tsk, &e->rule, ctx, NULL,
708 &state)) {
709 rcu_read_unlock();
710 ctx->current_state = state;
711 return state;
712 }
713 }
714 }
715 rcu_read_unlock();
716 return AUDIT_BUILD_CONTEXT;
717}
718
719
720
721
722
723
724void audit_filter_inodes(struct task_struct *tsk, struct audit_context *ctx)
725{
726 int i;
727 struct audit_entry *e;
728 enum audit_state state;
729
730 if (audit_pid && tsk->tgid == audit_pid)
731 return;
732
733 rcu_read_lock();
734 for (i = 0; i < ctx->name_count; i++) {
735 int word = AUDIT_WORD(ctx->major);
736 int bit = AUDIT_BIT(ctx->major);
737 struct audit_names *n = &ctx->names[i];
738 int h = audit_hash_ino((u32)n->ino);
739 struct list_head *list = &audit_inode_hash[h];
740
741 if (list_empty(list))
742 continue;
743
744 list_for_each_entry_rcu(e, list, list) {
745 if ((e->rule.mask[word] & bit) == bit &&
746 audit_filter_rules(tsk, &e->rule, ctx, n, &state)) {
747 rcu_read_unlock();
748 ctx->current_state = state;
749 return;
750 }
751 }
752 }
753 rcu_read_unlock();
754}
755
756static inline struct audit_context *audit_get_context(struct task_struct *tsk,
757 int return_valid,
758 long return_code)
759{
760 struct audit_context *context = tsk->audit_context;
761
762 if (likely(!context))
763 return NULL;
764 context->return_valid = return_valid;
765
766
767
768
769
770
771
772
773
774
775
776
777 if (unlikely(return_code <= -ERESTARTSYS) &&
778 (return_code >= -ERESTART_RESTARTBLOCK) &&
779 (return_code != -ENOIOCTLCMD))
780 context->return_code = -EINTR;
781 else
782 context->return_code = return_code;
783
784 if (context->in_syscall && !context->dummy) {
785 audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_EXIT]);
786 audit_filter_inodes(tsk, context);
787 }
788
789 tsk->audit_context = NULL;
790 return context;
791}
792
793static inline void audit_free_names(struct audit_context *context)
794{
795 int i;
796
797#if AUDIT_DEBUG == 2
798 if (context->put_count + context->ino_count != context->name_count) {
799 printk(KERN_ERR "%s:%d(:%d): major=%d in_syscall=%d"
800 " name_count=%d put_count=%d"
801 " ino_count=%d [NOT freeing]\n",
802 __FILE__, __LINE__,
803 context->serial, context->major, context->in_syscall,
804 context->name_count, context->put_count,
805 context->ino_count);
806 for (i = 0; i < context->name_count; i++) {
807 printk(KERN_ERR "names[%d] = %p = %s\n", i,
808 context->names[i].name,
809 context->names[i].name ?: "(null)");
810 }
811 dump_stack();
812 return;
813 }
814#endif
815#if AUDIT_DEBUG
816 context->put_count = 0;
817 context->ino_count = 0;
818#endif
819
820 for (i = 0; i < context->name_count; i++) {
821 if (context->names[i].name && context->names[i].name_put)
822 __putname(context->names[i].name);
823 }
824 context->name_count = 0;
825 path_put(&context->pwd);
826 context->pwd.dentry = NULL;
827 context->pwd.mnt = NULL;
828}
829
830static inline void audit_free_aux(struct audit_context *context)
831{
832 struct audit_aux_data *aux;
833
834 while ((aux = context->aux)) {
835 context->aux = aux->next;
836 kfree(aux);
837 }
838 while ((aux = context->aux_pids)) {
839 context->aux_pids = aux->next;
840 kfree(aux);
841 }
842}
843
844static inline void audit_zero_context(struct audit_context *context,
845 enum audit_state state)
846{
847 memset(context, 0, sizeof(*context));
848 context->state = state;
849 context->prio = state == AUDIT_RECORD_CONTEXT ? ~0ULL : 0;
850}
851
852static inline struct audit_context *audit_alloc_context(enum audit_state state)
853{
854 struct audit_context *context;
855
856 if (!(context = kmalloc(sizeof(*context), GFP_KERNEL)))
857 return NULL;
858 audit_zero_context(context, state);
859 INIT_LIST_HEAD(&context->killed_trees);
860 return context;
861}
862
863
864
865
866
867
868
869
870
871
872int audit_alloc(struct task_struct *tsk)
873{
874 struct audit_context *context;
875 enum audit_state state;
876 char *key = NULL;
877
878 if (likely(!audit_ever_enabled))
879 return 0;
880
881 state = audit_filter_task(tsk, &key);
882 if (likely(state == AUDIT_DISABLED))
883 return 0;
884
885 if (!(context = audit_alloc_context(state))) {
886 kfree(key);
887 audit_log_lost("out of memory in audit_alloc");
888 return -ENOMEM;
889 }
890 context->filterkey = key;
891
892 tsk->audit_context = context;
893 set_tsk_thread_flag(tsk, TIF_SYSCALL_AUDIT);
894 return 0;
895}
896
897static inline void audit_free_context(struct audit_context *context)
898{
899 struct audit_context *previous;
900 int count = 0;
901
902 do {
903 previous = context->previous;
904 if (previous || (count && count < 10)) {
905 ++count;
906 printk(KERN_ERR "audit(:%d): major=%d name_count=%d:"
907 " freeing multiple contexts (%d)\n",
908 context->serial, context->major,
909 context->name_count, count);
910 }
911 audit_free_names(context);
912 unroll_tree_refs(context, NULL, 0);
913 free_tree_refs(context);
914 audit_free_aux(context);
915 kfree(context->filterkey);
916 kfree(context->sockaddr);
917 kfree(context);
918 context = previous;
919 } while (context);
920 if (count >= 10)
921 printk(KERN_ERR "audit: freed %d contexts\n", count);
922}
923
924void audit_log_task_context(struct audit_buffer *ab)
925{
926 char *ctx = NULL;
927 unsigned len;
928 int error;
929 u32 sid;
930
931 security_task_getsecid(current, &sid);
932 if (!sid)
933 return;
934
935 error = security_secid_to_secctx(sid, &ctx, &len);
936 if (error) {
937 if (error != -EINVAL)
938 goto error_path;
939 return;
940 }
941
942 audit_log_format(ab, " subj=%s", ctx);
943 security_release_secctx(ctx, len);
944 return;
945
946error_path:
947 audit_panic("error in audit_log_task_context");
948 return;
949}
950
951EXPORT_SYMBOL(audit_log_task_context);
952
953static void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
954{
955 char name[sizeof(tsk->comm)];
956 struct mm_struct *mm = tsk->mm;
957 struct vm_area_struct *vma;
958
959
960
961 get_task_comm(name, tsk);
962 audit_log_format(ab, " comm=");
963 audit_log_untrustedstring(ab, name);
964
965 if (mm) {
966 down_read(&mm->mmap_sem);
967 vma = mm->mmap;
968 while (vma) {
969 if ((vma->vm_flags & VM_EXECUTABLE) &&
970 vma->vm_file) {
971 audit_log_d_path(ab, "exe=",
972 &vma->vm_file->f_path);
973 break;
974 }
975 vma = vma->vm_next;
976 }
977 up_read(&mm->mmap_sem);
978 }
979 audit_log_task_context(ab);
980}
981
982static int audit_log_pid_context(struct audit_context *context, pid_t pid,
983 uid_t auid, uid_t uid, unsigned int sessionid,
984 u32 sid, char *comm)
985{
986 struct audit_buffer *ab;
987 char *ctx = NULL;
988 u32 len;
989 int rc = 0;
990
991 ab = audit_log_start(context, GFP_KERNEL, AUDIT_OBJ_PID);
992 if (!ab)
993 return rc;
994
995 audit_log_format(ab, "opid=%d oauid=%d ouid=%d oses=%d", pid, auid,
996 uid, sessionid);
997 if (security_secid_to_secctx(sid, &ctx, &len)) {
998 audit_log_format(ab, " obj=(none)");
999 rc = 1;
1000 } else {
1001 audit_log_format(ab, " obj=%s", ctx);
1002 security_release_secctx(ctx, len);
1003 }
1004 audit_log_format(ab, " ocomm=");
1005 audit_log_untrustedstring(ab, comm);
1006 audit_log_end(ab);
1007
1008 return rc;
1009}
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022static int audit_log_single_execve_arg(struct audit_context *context,
1023 struct audit_buffer **ab,
1024 int arg_num,
1025 size_t *len_sent,
1026 const char __user *p,
1027 char *buf)
1028{
1029 char arg_num_len_buf[12];
1030 const char __user *tmp_p = p;
1031
1032 size_t arg_num_len = snprintf(arg_num_len_buf, 12, "%d", arg_num) + 5;
1033 size_t len, len_left, to_send;
1034 size_t max_execve_audit_len = MAX_EXECVE_AUDIT_LEN;
1035 unsigned int i, has_cntl = 0, too_long = 0;
1036 int ret;
1037
1038
1039 len_left = len = strnlen_user(p, MAX_ARG_STRLEN) - 1;
1040
1041
1042
1043
1044
1045
1046
1047 if (unlikely((len == -1) || len > MAX_ARG_STRLEN - 1)) {
1048 WARN_ON(1);
1049 send_sig(SIGKILL, current, 0);
1050 return -1;
1051 }
1052
1053
1054 do {
1055 if (len_left > MAX_EXECVE_AUDIT_LEN)
1056 to_send = MAX_EXECVE_AUDIT_LEN;
1057 else
1058 to_send = len_left;
1059 ret = copy_from_user(buf, tmp_p, to_send);
1060
1061
1062
1063
1064
1065 if (ret) {
1066 WARN_ON(1);
1067 send_sig(SIGKILL, current, 0);
1068 return -1;
1069 }
1070 buf[to_send] = '\0';
1071 has_cntl = audit_string_contains_control(buf, to_send);
1072 if (has_cntl) {
1073
1074
1075
1076
1077 max_execve_audit_len = MAX_EXECVE_AUDIT_LEN / 2;
1078 break;
1079 }
1080 len_left -= to_send;
1081 tmp_p += to_send;
1082 } while (len_left > 0);
1083
1084 len_left = len;
1085
1086 if (len > max_execve_audit_len)
1087 too_long = 1;
1088
1089
1090 for (i = 0; len_left > 0; i++) {
1091 int room_left;
1092
1093 if (len_left > max_execve_audit_len)
1094 to_send = max_execve_audit_len;
1095 else
1096 to_send = len_left;
1097
1098
1099 room_left = MAX_EXECVE_AUDIT_LEN - arg_num_len - *len_sent;
1100 if (has_cntl)
1101 room_left -= (to_send * 2);
1102 else
1103 room_left -= to_send;
1104 if (room_left < 0) {
1105 *len_sent = 0;
1106 audit_log_end(*ab);
1107 *ab = audit_log_start(context, GFP_KERNEL, AUDIT_EXECVE);
1108 if (!*ab)
1109 return 0;
1110 }
1111
1112
1113
1114
1115
1116 if ((i == 0) && (too_long))
1117 audit_log_format(*ab, " a%d_len=%zu", arg_num,
1118 has_cntl ? 2*len : len);
1119
1120
1121
1122
1123
1124
1125 if (len >= max_execve_audit_len)
1126 ret = copy_from_user(buf, p, to_send);
1127 else
1128 ret = 0;
1129 if (ret) {
1130 WARN_ON(1);
1131 send_sig(SIGKILL, current, 0);
1132 return -1;
1133 }
1134 buf[to_send] = '\0';
1135
1136
1137 audit_log_format(*ab, " a%d", arg_num);
1138 if (too_long)
1139 audit_log_format(*ab, "[%d]", i);
1140 audit_log_format(*ab, "=");
1141 if (has_cntl)
1142 audit_log_n_hex(*ab, buf, to_send);
1143 else
1144 audit_log_string(*ab, buf);
1145
1146 p += to_send;
1147 len_left -= to_send;
1148 *len_sent += arg_num_len;
1149 if (has_cntl)
1150 *len_sent += to_send * 2;
1151 else
1152 *len_sent += to_send;
1153 }
1154
1155 return len + 1;
1156}
1157
1158static void audit_log_execve_info(struct audit_context *context,
1159 struct audit_buffer **ab,
1160 struct audit_aux_data_execve *axi)
1161{
1162 int i;
1163 size_t len, len_sent = 0;
1164 const char __user *p;
1165 char *buf;
1166
1167 if (axi->mm != current->mm)
1168 return;
1169
1170 p = (const char __user *)axi->mm->arg_start;
1171
1172 audit_log_format(*ab, "argc=%d", axi->argc);
1173
1174
1175
1176
1177
1178
1179
1180 buf = kmalloc(MAX_EXECVE_AUDIT_LEN + 1, GFP_KERNEL);
1181 if (!buf) {
1182 audit_panic("out of memory for argv string\n");
1183 return;
1184 }
1185
1186 for (i = 0; i < axi->argc; i++) {
1187 len = audit_log_single_execve_arg(context, ab, i,
1188 &len_sent, p, buf);
1189 if (len <= 0)
1190 break;
1191 p += len;
1192 }
1193 kfree(buf);
1194}
1195
1196static void audit_log_cap(struct audit_buffer *ab, char *prefix, kernel_cap_t *cap)
1197{
1198 int i;
1199
1200 audit_log_format(ab, " %s=", prefix);
1201 CAP_FOR_EACH_U32(i) {
1202 audit_log_format(ab, "%08x", cap->cap[(_KERNEL_CAPABILITY_U32S-1) - i]);
1203 }
1204}
1205
1206static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
1207{
1208 kernel_cap_t *perm = &name->fcap.permitted;
1209 kernel_cap_t *inh = &name->fcap.inheritable;
1210 int log = 0;
1211
1212 if (!cap_isclear(*perm)) {
1213 audit_log_cap(ab, "cap_fp", perm);
1214 log = 1;
1215 }
1216 if (!cap_isclear(*inh)) {
1217 audit_log_cap(ab, "cap_fi", inh);
1218 log = 1;
1219 }
1220
1221 if (log)
1222 audit_log_format(ab, " cap_fe=%d cap_fver=%x", name->fcap.fE, name->fcap_ver);
1223}
1224
1225static void show_special(struct audit_context *context, int *call_panic)
1226{
1227 struct audit_buffer *ab;
1228 int i;
1229
1230 ab = audit_log_start(context, GFP_KERNEL, context->type);
1231 if (!ab)
1232 return;
1233
1234 switch (context->type) {
1235 case AUDIT_SOCKETCALL: {
1236 int nargs = context->socketcall.nargs;
1237 audit_log_format(ab, "nargs=%d", nargs);
1238 for (i = 0; i < nargs; i++)
1239 audit_log_format(ab, " a%d=%lx", i,
1240 context->socketcall.args[i]);
1241 break; }
1242 case AUDIT_IPC: {
1243 u32 osid = context->ipc.osid;
1244
1245 audit_log_format(ab, "ouid=%u ogid=%u mode=%#o",
1246 context->ipc.uid, context->ipc.gid, context->ipc.mode);
1247 if (osid) {
1248 char *ctx = NULL;
1249 u32 len;
1250 if (security_secid_to_secctx(osid, &ctx, &len)) {
1251 audit_log_format(ab, " osid=%u", osid);
1252 *call_panic = 1;
1253 } else {
1254 audit_log_format(ab, " obj=%s", ctx);
1255 security_release_secctx(ctx, len);
1256 }
1257 }
1258 if (context->ipc.has_perm) {
1259 audit_log_end(ab);
1260 ab = audit_log_start(context, GFP_KERNEL,
1261 AUDIT_IPC_SET_PERM);
1262 audit_log_format(ab,
1263 "qbytes=%lx ouid=%u ogid=%u mode=%#o",
1264 context->ipc.qbytes,
1265 context->ipc.perm_uid,
1266 context->ipc.perm_gid,
1267 context->ipc.perm_mode);
1268 if (!ab)
1269 return;
1270 }
1271 break; }
1272 case AUDIT_MQ_OPEN: {
1273 audit_log_format(ab,
1274 "oflag=0x%x mode=%#o mq_flags=0x%lx mq_maxmsg=%ld "
1275 "mq_msgsize=%ld mq_curmsgs=%ld",
1276 context->mq_open.oflag, context->mq_open.mode,
1277 context->mq_open.attr.mq_flags,
1278 context->mq_open.attr.mq_maxmsg,
1279 context->mq_open.attr.mq_msgsize,
1280 context->mq_open.attr.mq_curmsgs);
1281 break; }
1282 case AUDIT_MQ_SENDRECV: {
1283 audit_log_format(ab,
1284 "mqdes=%d msg_len=%zd msg_prio=%u "
1285 "abs_timeout_sec=%ld abs_timeout_nsec=%ld",
1286 context->mq_sendrecv.mqdes,
1287 context->mq_sendrecv.msg_len,
1288 context->mq_sendrecv.msg_prio,
1289 context->mq_sendrecv.abs_timeout.tv_sec,
1290 context->mq_sendrecv.abs_timeout.tv_nsec);
1291 break; }
1292 case AUDIT_MQ_NOTIFY: {
1293 audit_log_format(ab, "mqdes=%d sigev_signo=%d",
1294 context->mq_notify.mqdes,
1295 context->mq_notify.sigev_signo);
1296 break; }
1297 case AUDIT_MQ_GETSETATTR: {
1298 struct mq_attr *attr = &context->mq_getsetattr.mqstat;
1299 audit_log_format(ab,
1300 "mqdes=%d mq_flags=0x%lx mq_maxmsg=%ld mq_msgsize=%ld "
1301 "mq_curmsgs=%ld ",
1302 context->mq_getsetattr.mqdes,
1303 attr->mq_flags, attr->mq_maxmsg,
1304 attr->mq_msgsize, attr->mq_curmsgs);
1305 break; }
1306 case AUDIT_CAPSET: {
1307 audit_log_format(ab, "pid=%d", context->capset.pid);
1308 audit_log_cap(ab, "cap_pi", &context->capset.cap.inheritable);
1309 audit_log_cap(ab, "cap_pp", &context->capset.cap.permitted);
1310 audit_log_cap(ab, "cap_pe", &context->capset.cap.effective);
1311 break; }
1312 case AUDIT_MMAP: {
1313 audit_log_format(ab, "fd=%d flags=0x%x", context->mmap.fd,
1314 context->mmap.flags);
1315 break; }
1316 }
1317 audit_log_end(ab);
1318}
1319
1320static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
1321{
1322 const struct cred *cred;
1323 int i, call_panic = 0;
1324 struct audit_buffer *ab;
1325 struct audit_aux_data *aux;
1326 const char *tty;
1327
1328
1329 context->pid = tsk->pid;
1330 if (!context->ppid)
1331 context->ppid = sys_getppid();
1332 cred = current_cred();
1333 context->uid = cred->uid;
1334 context->gid = cred->gid;
1335 context->euid = cred->euid;
1336 context->suid = cred->suid;
1337 context->fsuid = cred->fsuid;
1338 context->egid = cred->egid;
1339 context->sgid = cred->sgid;
1340 context->fsgid = cred->fsgid;
1341 context->personality = tsk->personality;
1342
1343 ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
1344 if (!ab)
1345 return;
1346 audit_log_format(ab, "arch=%x syscall=%d",
1347 context->arch, context->major);
1348 if (context->personality != PER_LINUX)
1349 audit_log_format(ab, " per=%lx", context->personality);
1350 if (context->return_valid)
1351 audit_log_format(ab, " success=%s exit=%ld",
1352 (context->return_valid==AUDITSC_SUCCESS)?"yes":"no",
1353 context->return_code);
1354
1355 spin_lock_irq(&tsk->sighand->siglock);
1356 if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name)
1357 tty = tsk->signal->tty->name;
1358 else
1359 tty = "(none)";
1360 spin_unlock_irq(&tsk->sighand->siglock);
1361
1362 audit_log_format(ab,
1363 " a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
1364 " ppid=%d pid=%d auid=%u uid=%u gid=%u"
1365 " euid=%u suid=%u fsuid=%u"
1366 " egid=%u sgid=%u fsgid=%u tty=%s ses=%u",
1367 context->argv[0],
1368 context->argv[1],
1369 context->argv[2],
1370 context->argv[3],
1371 context->name_count,
1372 context->ppid,
1373 context->pid,
1374 tsk->loginuid,
1375 context->uid,
1376 context->gid,
1377 context->euid, context->suid, context->fsuid,
1378 context->egid, context->sgid, context->fsgid, tty,
1379 tsk->sessionid);
1380
1381
1382 audit_log_task_info(ab, tsk);
1383 audit_log_key(ab, context->filterkey);
1384 audit_log_end(ab);
1385
1386 for (aux = context->aux; aux; aux = aux->next) {
1387
1388 ab = audit_log_start(context, GFP_KERNEL, aux->type);
1389 if (!ab)
1390 continue;
1391
1392 switch (aux->type) {
1393
1394 case AUDIT_EXECVE: {
1395 struct audit_aux_data_execve *axi = (void *)aux;
1396 audit_log_execve_info(context, &ab, axi);
1397 break; }
1398
1399 case AUDIT_BPRM_FCAPS: {
1400 struct audit_aux_data_bprm_fcaps *axs = (void *)aux;
1401 audit_log_format(ab, "fver=%x", axs->fcap_ver);
1402 audit_log_cap(ab, "fp", &axs->fcap.permitted);
1403 audit_log_cap(ab, "fi", &axs->fcap.inheritable);
1404 audit_log_format(ab, " fe=%d", axs->fcap.fE);
1405 audit_log_cap(ab, "old_pp", &axs->old_pcap.permitted);
1406 audit_log_cap(ab, "old_pi", &axs->old_pcap.inheritable);
1407 audit_log_cap(ab, "old_pe", &axs->old_pcap.effective);
1408 audit_log_cap(ab, "new_pp", &axs->new_pcap.permitted);
1409 audit_log_cap(ab, "new_pi", &axs->new_pcap.inheritable);
1410 audit_log_cap(ab, "new_pe", &axs->new_pcap.effective);
1411 break; }
1412
1413 }
1414 audit_log_end(ab);
1415 }
1416
1417 if (context->type)
1418 show_special(context, &call_panic);
1419
1420 if (context->fds[0] >= 0) {
1421 ab = audit_log_start(context, GFP_KERNEL, AUDIT_FD_PAIR);
1422 if (ab) {
1423 audit_log_format(ab, "fd0=%d fd1=%d",
1424 context->fds[0], context->fds[1]);
1425 audit_log_end(ab);
1426 }
1427 }
1428
1429 if (context->sockaddr_len) {
1430 ab = audit_log_start(context, GFP_KERNEL, AUDIT_SOCKADDR);
1431 if (ab) {
1432 audit_log_format(ab, "saddr=");
1433 audit_log_n_hex(ab, (void *)context->sockaddr,
1434 context->sockaddr_len);
1435 audit_log_end(ab);
1436 }
1437 }
1438
1439 for (aux = context->aux_pids; aux; aux = aux->next) {
1440 struct audit_aux_data_pids *axs = (void *)aux;
1441
1442 for (i = 0; i < axs->pid_count; i++)
1443 if (audit_log_pid_context(context, axs->target_pid[i],
1444 axs->target_auid[i],
1445 axs->target_uid[i],
1446 axs->target_sessionid[i],
1447 axs->target_sid[i],
1448 axs->target_comm[i]))
1449 call_panic = 1;
1450 }
1451
1452 if (context->target_pid &&
1453 audit_log_pid_context(context, context->target_pid,
1454 context->target_auid, context->target_uid,
1455 context->target_sessionid,
1456 context->target_sid, context->target_comm))
1457 call_panic = 1;
1458
1459 if (context->pwd.dentry && context->pwd.mnt) {
1460 ab = audit_log_start(context, GFP_KERNEL, AUDIT_CWD);
1461 if (ab) {
1462 audit_log_d_path(ab, "cwd=", &context->pwd);
1463 audit_log_end(ab);
1464 }
1465 }
1466 for (i = 0; i < context->name_count; i++) {
1467 struct audit_names *n = &context->names[i];
1468
1469 ab = audit_log_start(context, GFP_KERNEL, AUDIT_PATH);
1470 if (!ab)
1471 continue;
1472
1473 audit_log_format(ab, "item=%d", i);
1474
1475 if (n->name) {
1476 switch(n->name_len) {
1477 case AUDIT_NAME_FULL:
1478
1479 audit_log_format(ab, " name=");
1480 audit_log_untrustedstring(ab, n->name);
1481 break;
1482 case 0:
1483
1484
1485 audit_log_d_path(ab, "name=", &context->pwd);
1486 break;
1487 default:
1488
1489 audit_log_format(ab, " name=");
1490 audit_log_n_untrustedstring(ab, n->name,
1491 n->name_len);
1492 }
1493 } else
1494 audit_log_format(ab, " name=(null)");
1495
1496 if (n->ino != (unsigned long)-1) {
1497 audit_log_format(ab, " inode=%lu"
1498 " dev=%02x:%02x mode=%#o"
1499 " ouid=%u ogid=%u rdev=%02x:%02x",
1500 n->ino,
1501 MAJOR(n->dev),
1502 MINOR(n->dev),
1503 n->mode,
1504 n->uid,
1505 n->gid,
1506 MAJOR(n->rdev),
1507 MINOR(n->rdev));
1508 }
1509 if (n->osid != 0) {
1510 char *ctx = NULL;
1511 u32 len;
1512 if (security_secid_to_secctx(
1513 n->osid, &ctx, &len)) {
1514 audit_log_format(ab, " osid=%u", n->osid);
1515 call_panic = 2;
1516 } else {
1517 audit_log_format(ab, " obj=%s", ctx);
1518 security_release_secctx(ctx, len);
1519 }
1520 }
1521
1522 audit_log_fcaps(ab, n);
1523
1524 audit_log_end(ab);
1525 }
1526
1527
1528 ab = audit_log_start(context, GFP_KERNEL, AUDIT_EOE);
1529 if (ab)
1530 audit_log_end(ab);
1531 if (call_panic)
1532 audit_panic("error converting sid to string");
1533}
1534
1535
1536
1537
1538
1539
1540
1541void audit_free(struct task_struct *tsk)
1542{
1543 struct audit_context *context;
1544
1545 context = audit_get_context(tsk, 0, 0);
1546 if (likely(!context))
1547 return;
1548
1549
1550
1551
1552
1553
1554 if (context->in_syscall && context->current_state == AUDIT_RECORD_CONTEXT)
1555 audit_log_exit(context, tsk);
1556 if (!list_empty(&context->killed_trees))
1557 audit_kill_trees(&context->killed_trees);
1558
1559 audit_free_context(context);
1560}
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579void audit_syscall_entry(int arch, int major,
1580 unsigned long a1, unsigned long a2,
1581 unsigned long a3, unsigned long a4)
1582{
1583 struct task_struct *tsk = current;
1584 struct audit_context *context = tsk->audit_context;
1585 enum audit_state state;
1586
1587 if (unlikely(!context))
1588 return;
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604 if (context->in_syscall) {
1605 struct audit_context *newctx;
1606
1607#if AUDIT_DEBUG
1608 printk(KERN_ERR
1609 "audit(:%d) pid=%d in syscall=%d;"
1610 " entering syscall=%d\n",
1611 context->serial, tsk->pid, context->major, major);
1612#endif
1613 newctx = audit_alloc_context(context->state);
1614 if (newctx) {
1615 newctx->previous = context;
1616 context = newctx;
1617 tsk->audit_context = newctx;
1618 } else {
1619
1620
1621
1622
1623 audit_zero_context(context, context->state);
1624 }
1625 }
1626 BUG_ON(context->in_syscall || context->name_count);
1627
1628 if (!audit_enabled)
1629 return;
1630
1631 context->arch = arch;
1632 context->major = major;
1633 context->argv[0] = a1;
1634 context->argv[1] = a2;
1635 context->argv[2] = a3;
1636 context->argv[3] = a4;
1637
1638 state = context->state;
1639 context->dummy = !audit_n_rules;
1640 if (!context->dummy && state == AUDIT_BUILD_CONTEXT) {
1641 context->prio = 0;
1642 state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_ENTRY]);
1643 }
1644 if (likely(state == AUDIT_DISABLED))
1645 return;
1646
1647 context->serial = 0;
1648 context->ctime = CURRENT_TIME;
1649 context->in_syscall = 1;
1650 context->current_state = state;
1651 context->ppid = 0;
1652}
1653
1654void audit_finish_fork(struct task_struct *child)
1655{
1656 struct audit_context *ctx = current->audit_context;
1657 struct audit_context *p = child->audit_context;
1658 if (!p || !ctx)
1659 return;
1660 if (!ctx->in_syscall || ctx->current_state != AUDIT_RECORD_CONTEXT)
1661 return;
1662 p->arch = ctx->arch;
1663 p->major = ctx->major;
1664 memcpy(p->argv, ctx->argv, sizeof(ctx->argv));
1665 p->ctime = ctx->ctime;
1666 p->dummy = ctx->dummy;
1667 p->in_syscall = ctx->in_syscall;
1668 p->filterkey = kstrdup(ctx->filterkey, GFP_KERNEL);
1669 p->ppid = current->pid;
1670 p->prio = ctx->prio;
1671 p->current_state = ctx->current_state;
1672}
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685void audit_syscall_exit(int valid, long return_code)
1686{
1687 struct task_struct *tsk = current;
1688 struct audit_context *context;
1689
1690 context = audit_get_context(tsk, valid, return_code);
1691
1692 if (likely(!context))
1693 return;
1694
1695 if (context->in_syscall && context->current_state == AUDIT_RECORD_CONTEXT)
1696 audit_log_exit(context, tsk);
1697
1698 context->in_syscall = 0;
1699 context->prio = context->state == AUDIT_RECORD_CONTEXT ? ~0ULL : 0;
1700
1701 if (!list_empty(&context->killed_trees))
1702 audit_kill_trees(&context->killed_trees);
1703
1704 if (context->previous) {
1705 struct audit_context *new_context = context->previous;
1706 context->previous = NULL;
1707 audit_free_context(context);
1708 tsk->audit_context = new_context;
1709 } else {
1710 audit_free_names(context);
1711 unroll_tree_refs(context, NULL, 0);
1712 audit_free_aux(context);
1713 context->aux = NULL;
1714 context->aux_pids = NULL;
1715 context->target_pid = 0;
1716 context->target_sid = 0;
1717 context->sockaddr_len = 0;
1718 context->type = 0;
1719 context->fds[0] = -1;
1720 if (context->state != AUDIT_RECORD_CONTEXT) {
1721 kfree(context->filterkey);
1722 context->filterkey = NULL;
1723 }
1724 tsk->audit_context = context;
1725 }
1726}
1727
1728static inline void handle_one(const struct inode *inode)
1729{
1730#ifdef CONFIG_AUDIT_TREE
1731 struct audit_context *context;
1732 struct audit_tree_refs *p;
1733 struct audit_chunk *chunk;
1734 int count;
1735 if (likely(hlist_empty(&inode->i_fsnotify_marks)))
1736 return;
1737 context = current->audit_context;
1738 p = context->trees;
1739 count = context->tree_count;
1740 rcu_read_lock();
1741 chunk = audit_tree_lookup(inode);
1742 rcu_read_unlock();
1743 if (!chunk)
1744 return;
1745 if (likely(put_tree_ref(context, chunk)))
1746 return;
1747 if (unlikely(!grow_tree_refs(context))) {
1748 printk(KERN_WARNING "out of memory, audit has lost a tree reference\n");
1749 audit_set_auditable(context);
1750 audit_put_chunk(chunk);
1751 unroll_tree_refs(context, p, count);
1752 return;
1753 }
1754 put_tree_ref(context, chunk);
1755#endif
1756}
1757
1758static void handle_path(const struct dentry *dentry)
1759{
1760#ifdef CONFIG_AUDIT_TREE
1761 struct audit_context *context;
1762 struct audit_tree_refs *p;
1763 const struct dentry *d, *parent;
1764 struct audit_chunk *drop;
1765 unsigned long seq;
1766 int count;
1767
1768 context = current->audit_context;
1769 p = context->trees;
1770 count = context->tree_count;
1771retry:
1772 drop = NULL;
1773 d = dentry;
1774 rcu_read_lock();
1775 seq = read_seqbegin(&rename_lock);
1776 for(;;) {
1777 struct inode *inode = d->d_inode;
1778 if (inode && unlikely(!hlist_empty(&inode->i_fsnotify_marks))) {
1779 struct audit_chunk *chunk;
1780 chunk = audit_tree_lookup(inode);
1781 if (chunk) {
1782 if (unlikely(!put_tree_ref(context, chunk))) {
1783 drop = chunk;
1784 break;
1785 }
1786 }
1787 }
1788 parent = d->d_parent;
1789 if (parent == d)
1790 break;
1791 d = parent;
1792 }
1793 if (unlikely(read_seqretry(&rename_lock, seq) || drop)) {
1794 rcu_read_unlock();
1795 if (!drop) {
1796
1797 unroll_tree_refs(context, p, count);
1798 goto retry;
1799 }
1800 audit_put_chunk(drop);
1801 if (grow_tree_refs(context)) {
1802
1803 unroll_tree_refs(context, p, count);
1804 goto retry;
1805 }
1806
1807 printk(KERN_WARNING
1808 "out of memory, audit has lost a tree reference\n");
1809 unroll_tree_refs(context, p, count);
1810 audit_set_auditable(context);
1811 return;
1812 }
1813 rcu_read_unlock();
1814#endif
1815}
1816
1817
1818
1819
1820
1821
1822
1823
1824void __audit_getname(const char *name)
1825{
1826 struct audit_context *context = current->audit_context;
1827
1828 if (IS_ERR(name) || !name)
1829 return;
1830
1831 if (!context->in_syscall) {
1832#if AUDIT_DEBUG == 2
1833 printk(KERN_ERR "%s:%d(:%d): ignoring getname(%p)\n",
1834 __FILE__, __LINE__, context->serial, name);
1835 dump_stack();
1836#endif
1837 return;
1838 }
1839 BUG_ON(context->name_count >= AUDIT_NAMES);
1840 context->names[context->name_count].name = name;
1841 context->names[context->name_count].name_len = AUDIT_NAME_FULL;
1842 context->names[context->name_count].name_put = 1;
1843 context->names[context->name_count].ino = (unsigned long)-1;
1844 context->names[context->name_count].osid = 0;
1845 ++context->name_count;
1846 if (!context->pwd.dentry)
1847 get_fs_pwd(current->fs, &context->pwd);
1848}
1849
1850
1851
1852
1853
1854
1855
1856
1857void audit_putname(const char *name)
1858{
1859 struct audit_context *context = current->audit_context;
1860
1861 BUG_ON(!context);
1862 if (!context->in_syscall) {
1863#if AUDIT_DEBUG == 2
1864 printk(KERN_ERR "%s:%d(:%d): __putname(%p)\n",
1865 __FILE__, __LINE__, context->serial, name);
1866 if (context->name_count) {
1867 int i;
1868 for (i = 0; i < context->name_count; i++)
1869 printk(KERN_ERR "name[%d] = %p = %s\n", i,
1870 context->names[i].name,
1871 context->names[i].name ?: "(null)");
1872 }
1873#endif
1874 __putname(name);
1875 }
1876#if AUDIT_DEBUG
1877 else {
1878 ++context->put_count;
1879 if (context->put_count > context->name_count) {
1880 printk(KERN_ERR "%s:%d(:%d): major=%d"
1881 " in_syscall=%d putname(%p) name_count=%d"
1882 " put_count=%d\n",
1883 __FILE__, __LINE__,
1884 context->serial, context->major,
1885 context->in_syscall, name, context->name_count,
1886 context->put_count);
1887 dump_stack();
1888 }
1889 }
1890#endif
1891}
1892
1893static int audit_inc_name_count(struct audit_context *context,
1894 const struct inode *inode)
1895{
1896 if (context->name_count >= AUDIT_NAMES) {
1897 if (inode)
1898 printk(KERN_DEBUG "audit: name_count maxed, losing inode data: "
1899 "dev=%02x:%02x, inode=%lu\n",
1900 MAJOR(inode->i_sb->s_dev),
1901 MINOR(inode->i_sb->s_dev),
1902 inode->i_ino);
1903
1904 else
1905 printk(KERN_DEBUG "name_count maxed, losing inode data\n");
1906 return 1;
1907 }
1908 context->name_count++;
1909#if AUDIT_DEBUG
1910 context->ino_count++;
1911#endif
1912 return 0;
1913}
1914
1915
1916static inline int audit_copy_fcaps(struct audit_names *name, const struct dentry *dentry)
1917{
1918 struct cpu_vfs_cap_data caps;
1919 int rc;
1920
1921 memset(&name->fcap.permitted, 0, sizeof(kernel_cap_t));
1922 memset(&name->fcap.inheritable, 0, sizeof(kernel_cap_t));
1923 name->fcap.fE = 0;
1924 name->fcap_ver = 0;
1925
1926 if (!dentry)
1927 return 0;
1928
1929 rc = get_vfs_caps_from_disk(dentry, &caps);
1930 if (rc)
1931 return rc;
1932
1933 name->fcap.permitted = caps.permitted;
1934 name->fcap.inheritable = caps.inheritable;
1935 name->fcap.fE = !!(caps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
1936 name->fcap_ver = (caps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
1937
1938 return 0;
1939}
1940
1941
1942
1943static void audit_copy_inode(struct audit_names *name, const struct dentry *dentry,
1944 const struct inode *inode)
1945{
1946 name->ino = inode->i_ino;
1947 name->dev = inode->i_sb->s_dev;
1948 name->mode = inode->i_mode;
1949 name->uid = inode->i_uid;
1950 name->gid = inode->i_gid;
1951 name->rdev = inode->i_rdev;
1952 security_inode_getsecid(inode, &name->osid);
1953 audit_copy_fcaps(name, dentry);
1954}
1955
1956
1957
1958
1959
1960
1961
1962
1963void __audit_inode(const char *name, const struct dentry *dentry)
1964{
1965 int idx;
1966 struct audit_context *context = current->audit_context;
1967 const struct inode *inode = dentry->d_inode;
1968
1969 if (!context->in_syscall)
1970 return;
1971 if (context->name_count
1972 && context->names[context->name_count-1].name
1973 && context->names[context->name_count-1].name == name)
1974 idx = context->name_count - 1;
1975 else if (context->name_count > 1
1976 && context->names[context->name_count-2].name
1977 && context->names[context->name_count-2].name == name)
1978 idx = context->name_count - 2;
1979 else {
1980
1981
1982 if (audit_inc_name_count(context, inode))
1983 return;
1984 idx = context->name_count - 1;
1985 context->names[idx].name = NULL;
1986 }
1987 handle_path(dentry);
1988 audit_copy_inode(&context->names[idx], dentry, inode);
1989}
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004void __audit_inode_child(const struct dentry *dentry,
2005 const struct inode *parent)
2006{
2007 int idx;
2008 struct audit_context *context = current->audit_context;
2009 const char *found_parent = NULL, *found_child = NULL;
2010 const struct inode *inode = dentry->d_inode;
2011 const char *dname = dentry->d_name.name;
2012 int dirlen = 0;
2013
2014 if (!context->in_syscall)
2015 return;
2016
2017 if (inode)
2018 handle_one(inode);
2019
2020
2021 for (idx = 0; idx < context->name_count; idx++) {
2022 struct audit_names *n = &context->names[idx];
2023
2024 if (!n->name)
2025 continue;
2026
2027 if (n->ino == parent->i_ino &&
2028 !audit_compare_dname_path(dname, n->name, &dirlen)) {
2029 n->name_len = dirlen;
2030 found_parent = n->name;
2031 goto add_names;
2032 }
2033 }
2034
2035
2036 for (idx = 0; idx < context->name_count; idx++) {
2037 struct audit_names *n = &context->names[idx];
2038
2039 if (!n->name)
2040 continue;
2041
2042
2043 if (!strcmp(dname, n->name) ||
2044 !audit_compare_dname_path(dname, n->name, &dirlen)) {
2045 if (inode)
2046 audit_copy_inode(n, NULL, inode);
2047 else
2048 n->ino = (unsigned long)-1;
2049 found_child = n->name;
2050 goto add_names;
2051 }
2052 }
2053
2054add_names:
2055 if (!found_parent) {
2056 if (audit_inc_name_count(context, parent))
2057 return;
2058 idx = context->name_count - 1;
2059 context->names[idx].name = NULL;
2060 audit_copy_inode(&context->names[idx], NULL, parent);
2061 }
2062
2063 if (!found_child) {
2064 if (audit_inc_name_count(context, inode))
2065 return;
2066 idx = context->name_count - 1;
2067
2068
2069
2070
2071 if (found_parent) {
2072 context->names[idx].name = found_parent;
2073 context->names[idx].name_len = AUDIT_NAME_FULL;
2074
2075 context->names[idx].name_put = 0;
2076 } else {
2077 context->names[idx].name = NULL;
2078 }
2079
2080 if (inode)
2081 audit_copy_inode(&context->names[idx], NULL, inode);
2082 else
2083 context->names[idx].ino = (unsigned long)-1;
2084 }
2085}
2086EXPORT_SYMBOL_GPL(__audit_inode_child);
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096int auditsc_get_stamp(struct audit_context *ctx,
2097 struct timespec *t, unsigned int *serial)
2098{
2099 if (!ctx->in_syscall)
2100 return 0;
2101 if (!ctx->serial)
2102 ctx->serial = audit_serial();
2103 t->tv_sec = ctx->ctime.tv_sec;
2104 t->tv_nsec = ctx->ctime.tv_nsec;
2105 *serial = ctx->serial;
2106 if (!ctx->prio) {
2107 ctx->prio = 1;
2108 ctx->current_state = AUDIT_RECORD_CONTEXT;
2109 }
2110 return 1;
2111}
2112
2113
2114static atomic_t session_id = ATOMIC_INIT(0);
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
2126{
2127 unsigned int sessionid = atomic_inc_return(&session_id);
2128 struct audit_context *context = task->audit_context;
2129
2130 if (context && context->in_syscall) {
2131 struct audit_buffer *ab;
2132
2133 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_LOGIN);
2134 if (ab) {
2135 audit_log_format(ab, "login pid=%d uid=%u "
2136 "old auid=%u new auid=%u"
2137 " old ses=%u new ses=%u",
2138 task->pid, task_uid(task),
2139 task->loginuid, loginuid,
2140 task->sessionid, sessionid);
2141 audit_log_end(ab);
2142 }
2143 }
2144 task->sessionid = sessionid;
2145 task->loginuid = loginuid;
2146 return 0;
2147}
2148
2149
2150
2151
2152
2153
2154
2155
2156void __audit_mq_open(int oflag, mode_t mode, struct mq_attr *attr)
2157{
2158 struct audit_context *context = current->audit_context;
2159
2160 if (attr)
2161 memcpy(&context->mq_open.attr, attr, sizeof(struct mq_attr));
2162 else
2163 memset(&context->mq_open.attr, 0, sizeof(struct mq_attr));
2164
2165 context->mq_open.oflag = oflag;
2166 context->mq_open.mode = mode;
2167
2168 context->type = AUDIT_MQ_OPEN;
2169}
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio,
2180 const struct timespec *abs_timeout)
2181{
2182 struct audit_context *context = current->audit_context;
2183 struct timespec *p = &context->mq_sendrecv.abs_timeout;
2184
2185 if (abs_timeout)
2186 memcpy(p, abs_timeout, sizeof(struct timespec));
2187 else
2188 memset(p, 0, sizeof(struct timespec));
2189
2190 context->mq_sendrecv.mqdes = mqdes;
2191 context->mq_sendrecv.msg_len = msg_len;
2192 context->mq_sendrecv.msg_prio = msg_prio;
2193
2194 context->type = AUDIT_MQ_SENDRECV;
2195}
2196
2197
2198
2199
2200
2201
2202
2203
2204void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
2205{
2206 struct audit_context *context = current->audit_context;
2207
2208 if (notification)
2209 context->mq_notify.sigev_signo = notification->sigev_signo;
2210 else
2211 context->mq_notify.sigev_signo = 0;
2212
2213 context->mq_notify.mqdes = mqdes;
2214 context->type = AUDIT_MQ_NOTIFY;
2215}
2216
2217
2218
2219
2220
2221
2222
2223void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
2224{
2225 struct audit_context *context = current->audit_context;
2226 context->mq_getsetattr.mqdes = mqdes;
2227 context->mq_getsetattr.mqstat = *mqstat;
2228 context->type = AUDIT_MQ_GETSETATTR;
2229}
2230
2231
2232
2233
2234
2235
2236void __audit_ipc_obj(struct kern_ipc_perm *ipcp)
2237{
2238 struct audit_context *context = current->audit_context;
2239 context->ipc.uid = ipcp->uid;
2240 context->ipc.gid = ipcp->gid;
2241 context->ipc.mode = ipcp->mode;
2242 context->ipc.has_perm = 0;
2243 security_ipc_getsecid(ipcp, &context->ipc.osid);
2244 context->type = AUDIT_IPC;
2245}
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode)
2257{
2258 struct audit_context *context = current->audit_context;
2259
2260 context->ipc.qbytes = qbytes;
2261 context->ipc.perm_uid = uid;
2262 context->ipc.perm_gid = gid;
2263 context->ipc.perm_mode = mode;
2264 context->ipc.has_perm = 1;
2265}
2266
2267int audit_bprm(struct linux_binprm *bprm)
2268{
2269 struct audit_aux_data_execve *ax;
2270 struct audit_context *context = current->audit_context;
2271
2272 if (likely(!audit_enabled || !context || context->dummy))
2273 return 0;
2274
2275 ax = kmalloc(sizeof(*ax), GFP_KERNEL);
2276 if (!ax)
2277 return -ENOMEM;
2278
2279 ax->argc = bprm->argc;
2280 ax->envc = bprm->envc;
2281 ax->mm = bprm->mm;
2282 ax->d.type = AUDIT_EXECVE;
2283 ax->d.next = context->aux;
2284 context->aux = (void *)ax;
2285 return 0;
2286}
2287
2288
2289
2290
2291
2292
2293
2294
2295void audit_socketcall(int nargs, unsigned long *args)
2296{
2297 struct audit_context *context = current->audit_context;
2298
2299 if (likely(!context || context->dummy))
2300 return;
2301
2302 context->type = AUDIT_SOCKETCALL;
2303 context->socketcall.nargs = nargs;
2304 memcpy(context->socketcall.args, args, nargs * sizeof(unsigned long));
2305}
2306
2307
2308
2309
2310
2311
2312
2313void __audit_fd_pair(int fd1, int fd2)
2314{
2315 struct audit_context *context = current->audit_context;
2316 context->fds[0] = fd1;
2317 context->fds[1] = fd2;
2318}
2319
2320
2321
2322
2323
2324
2325
2326
2327int audit_sockaddr(int len, void *a)
2328{
2329 struct audit_context *context = current->audit_context;
2330
2331 if (likely(!context || context->dummy))
2332 return 0;
2333
2334 if (!context->sockaddr) {
2335 void *p = kmalloc(sizeof(struct sockaddr_storage), GFP_KERNEL);
2336 if (!p)
2337 return -ENOMEM;
2338 context->sockaddr = p;
2339 }
2340
2341 context->sockaddr_len = len;
2342 memcpy(context->sockaddr, a, len);
2343 return 0;
2344}
2345
2346void __audit_ptrace(struct task_struct *t)
2347{
2348 struct audit_context *context = current->audit_context;
2349
2350 context->target_pid = t->pid;
2351 context->target_auid = audit_get_loginuid(t);
2352 context->target_uid = task_uid(t);
2353 context->target_sessionid = audit_get_sessionid(t);
2354 security_task_getsecid(t, &context->target_sid);
2355 memcpy(context->target_comm, t->comm, TASK_COMM_LEN);
2356}
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366int __audit_signal_info(int sig, struct task_struct *t)
2367{
2368 struct audit_aux_data_pids *axp;
2369 struct task_struct *tsk = current;
2370 struct audit_context *ctx = tsk->audit_context;
2371 uid_t uid = current_uid(), t_uid = task_uid(t);
2372
2373 if (audit_pid && t->tgid == audit_pid) {
2374 if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1 || sig == SIGUSR2) {
2375 audit_sig_pid = tsk->pid;
2376 if (tsk->loginuid != -1)
2377 audit_sig_uid = tsk->loginuid;
2378 else
2379 audit_sig_uid = uid;
2380 security_task_getsecid(tsk, &audit_sig_sid);
2381 }
2382 if (!audit_signals || audit_dummy_context())
2383 return 0;
2384 }
2385
2386
2387
2388 if (!ctx->target_pid) {
2389 ctx->target_pid = t->tgid;
2390 ctx->target_auid = audit_get_loginuid(t);
2391 ctx->target_uid = t_uid;
2392 ctx->target_sessionid = audit_get_sessionid(t);
2393 security_task_getsecid(t, &ctx->target_sid);
2394 memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN);
2395 return 0;
2396 }
2397
2398 axp = (void *)ctx->aux_pids;
2399 if (!axp || axp->pid_count == AUDIT_AUX_PIDS) {
2400 axp = kzalloc(sizeof(*axp), GFP_ATOMIC);
2401 if (!axp)
2402 return -ENOMEM;
2403
2404 axp->d.type = AUDIT_OBJ_PID;
2405 axp->d.next = ctx->aux_pids;
2406 ctx->aux_pids = (void *)axp;
2407 }
2408 BUG_ON(axp->pid_count >= AUDIT_AUX_PIDS);
2409
2410 axp->target_pid[axp->pid_count] = t->tgid;
2411 axp->target_auid[axp->pid_count] = audit_get_loginuid(t);
2412 axp->target_uid[axp->pid_count] = t_uid;
2413 axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t);
2414 security_task_getsecid(t, &axp->target_sid[axp->pid_count]);
2415 memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN);
2416 axp->pid_count++;
2417
2418 return 0;
2419}
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
2433 const struct cred *new, const struct cred *old)
2434{
2435 struct audit_aux_data_bprm_fcaps *ax;
2436 struct audit_context *context = current->audit_context;
2437 struct cpu_vfs_cap_data vcaps;
2438 struct dentry *dentry;
2439
2440 ax = kmalloc(sizeof(*ax), GFP_KERNEL);
2441 if (!ax)
2442 return -ENOMEM;
2443
2444 ax->d.type = AUDIT_BPRM_FCAPS;
2445 ax->d.next = context->aux;
2446 context->aux = (void *)ax;
2447
2448 dentry = dget(bprm->file->f_dentry);
2449 get_vfs_caps_from_disk(dentry, &vcaps);
2450 dput(dentry);
2451
2452 ax->fcap.permitted = vcaps.permitted;
2453 ax->fcap.inheritable = vcaps.inheritable;
2454 ax->fcap.fE = !!(vcaps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
2455 ax->fcap_ver = (vcaps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
2456
2457 ax->old_pcap.permitted = old->cap_permitted;
2458 ax->old_pcap.inheritable = old->cap_inheritable;
2459 ax->old_pcap.effective = old->cap_effective;
2460
2461 ax->new_pcap.permitted = new->cap_permitted;
2462 ax->new_pcap.inheritable = new->cap_inheritable;
2463 ax->new_pcap.effective = new->cap_effective;
2464 return 0;
2465}
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476void __audit_log_capset(pid_t pid,
2477 const struct cred *new, const struct cred *old)
2478{
2479 struct audit_context *context = current->audit_context;
2480 context->capset.pid = pid;
2481 context->capset.cap.effective = new->cap_effective;
2482 context->capset.cap.inheritable = new->cap_effective;
2483 context->capset.cap.permitted = new->cap_permitted;
2484 context->type = AUDIT_CAPSET;
2485}
2486
2487void __audit_mmap_fd(int fd, int flags)
2488{
2489 struct audit_context *context = current->audit_context;
2490 context->mmap.fd = fd;
2491 context->mmap.flags = flags;
2492 context->type = AUDIT_MMAP;
2493}
2494
2495
2496
2497
2498
2499
2500
2501
2502void audit_core_dumps(long signr)
2503{
2504 struct audit_buffer *ab;
2505 u32 sid;
2506 uid_t auid = audit_get_loginuid(current), uid;
2507 gid_t gid;
2508 unsigned int sessionid = audit_get_sessionid(current);
2509
2510 if (!audit_enabled)
2511 return;
2512
2513 if (signr == SIGQUIT)
2514 return;
2515
2516 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
2517 current_uid_gid(&uid, &gid);
2518 audit_log_format(ab, "auid=%u uid=%u gid=%u ses=%u",
2519 auid, uid, gid, sessionid);
2520 security_task_getsecid(current, &sid);
2521 if (sid) {
2522 char *ctx = NULL;
2523 u32 len;
2524
2525 if (security_secid_to_secctx(sid, &ctx, &len))
2526 audit_log_format(ab, " ssid=%u", sid);
2527 else {
2528 audit_log_format(ab, " subj=%s", ctx);
2529 security_release_secctx(ctx, len);
2530 }
2531 }
2532 audit_log_format(ab, " pid=%d comm=", current->pid);
2533 audit_log_untrustedstring(ab, current->comm);
2534 audit_log_format(ab, " sig=%ld", signr);
2535 audit_log_end(ab);
2536}
2537
2538struct list_head *audit_killed_trees(void)
2539{
2540 struct audit_context *ctx = current->audit_context;
2541 if (likely(!ctx || !ctx->in_syscall))
2542 return NULL;
2543 return &ctx->killed_trees;
2544}
2545