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 <linux/atomic.h>
49 #include <linux/namei.h>
51 #include <linux/export.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 #include <linux/compat.h>
74 /* flags stating the success for a syscall */
75 #define AUDITSC_INVALID 0
76 #define AUDITSC_SUCCESS 1
77 #define AUDITSC_FAILURE 2
79 /* AUDIT_NAMES is the number of slots we reserve in the audit_context
80 * for saving names from getname(). If we get more names we will allocate
81 * a name dynamically and also add those to the list anchored by names_list. */
84 /* no execve audit message should be longer than this (userspace limits) */
85 #define MAX_EXECVE_AUDIT_LEN 7500
87 /* number of audit rules */
90 /* determines whether we collect data for signals sent */
93 struct audit_cap_data {
94 kernel_cap_t permitted;
95 kernel_cap_t inheritable;
97 unsigned int fE; /* effective bit of a file capability */
98 kernel_cap_t effective; /* effective set of a process */
102 /* When fs/namei.c:getname() is called, we store the pointer in name and
103 * we don't let putname() free it (instead we free all of the saved
104 * pointers at syscall exit time).
106 * Further, in fs/namei.c:path_lookup() we store the inode and device.
109 struct list_head list; /* audit_context->names_list */
110 struct filename *name;
118 struct audit_cap_data fcap;
119 unsigned int fcap_ver;
120 int name_len; /* number of name's characters to log */
121 unsigned char type; /* record type */
122 bool name_put; /* call __putname() for this name */
124 * This was an allocated audit_names and not from the array of
125 * names allocated in the task audit context. Thus this name
126 * should be freed on syscall exit
131 struct audit_aux_data {
132 struct audit_aux_data *next;
136 #define AUDIT_AUX_IPCPERM 0
138 /* Number of target pids per aux struct. */
139 #define AUDIT_AUX_PIDS 16
141 struct audit_aux_data_execve {
142 struct audit_aux_data d;
145 struct mm_struct *mm;
148 struct audit_aux_data_pids {
149 struct audit_aux_data d;
150 pid_t target_pid[AUDIT_AUX_PIDS];
151 kuid_t target_auid[AUDIT_AUX_PIDS];
152 kuid_t target_uid[AUDIT_AUX_PIDS];
153 unsigned int target_sessionid[AUDIT_AUX_PIDS];
154 u32 target_sid[AUDIT_AUX_PIDS];
155 char target_comm[AUDIT_AUX_PIDS][TASK_COMM_LEN];
159 struct audit_aux_data_bprm_fcaps {
160 struct audit_aux_data d;
161 struct audit_cap_data fcap;
162 unsigned int fcap_ver;
163 struct audit_cap_data old_pcap;
164 struct audit_cap_data new_pcap;
167 struct audit_aux_data_capset {
168 struct audit_aux_data d;
170 struct audit_cap_data cap;
173 struct audit_tree_refs {
174 struct audit_tree_refs *next;
175 struct audit_chunk *c[31];
178 /* The per-task audit context. */
179 struct audit_context {
180 int dummy; /* must be the first element */
181 int in_syscall; /* 1 if task is in a syscall */
182 enum audit_state state, current_state;
183 unsigned int serial; /* serial number for record */
184 int major; /* syscall number */
185 struct timespec ctime; /* time of syscall entry */
186 unsigned long argv[4]; /* syscall arguments */
187 long return_code;/* syscall return code */
189 int return_valid; /* return code is valid */
191 * The names_list is the list of all audit_names collected during this
192 * syscall. The first AUDIT_NAMES entries in the names_list will
193 * actually be from the preallocated_names array for performance
194 * reasons. Except during allocation they should never be referenced
195 * through the preallocated_names array and should only be found/used
196 * by running the names_list.
198 struct audit_names preallocated_names[AUDIT_NAMES];
199 int name_count; /* total records in names_list */
200 struct list_head names_list; /* anchor for struct audit_names->list */
201 char * filterkey; /* key for rule that triggered record */
203 struct audit_aux_data *aux;
204 struct audit_aux_data *aux_pids;
205 struct sockaddr_storage *sockaddr;
207 /* Save things to print about task_struct */
209 kuid_t uid, euid, suid, fsuid;
210 kgid_t gid, egid, sgid, fsgid;
211 unsigned long personality;
217 unsigned int target_sessionid;
219 char target_comm[TASK_COMM_LEN];
221 struct audit_tree_refs *trees, *first_trees;
222 struct list_head killed_trees;
229 long args[AUDITSC_ARGS];
240 unsigned long qbytes;
244 struct mq_attr mqstat;
253 unsigned int msg_prio;
254 struct timespec abs_timeout;
263 struct audit_cap_data cap;
278 static inline int open_arg(int flags, int mask)
280 int n = ACC_MODE(flags);
281 if (flags & (O_TRUNC | O_CREAT))
282 n |= AUDIT_PERM_WRITE;
286 static int audit_match_perm(struct audit_context *ctx, int mask)
293 switch (audit_classify_syscall(ctx->arch, n)) {
295 if ((mask & AUDIT_PERM_WRITE) &&
296 audit_match_class(AUDIT_CLASS_WRITE, n))
298 if ((mask & AUDIT_PERM_READ) &&
299 audit_match_class(AUDIT_CLASS_READ, n))
301 if ((mask & AUDIT_PERM_ATTR) &&
302 audit_match_class(AUDIT_CLASS_CHATTR, n))
305 case 1: /* 32bit on biarch */
306 if ((mask & AUDIT_PERM_WRITE) &&
307 audit_match_class(AUDIT_CLASS_WRITE_32, n))
309 if ((mask & AUDIT_PERM_READ) &&
310 audit_match_class(AUDIT_CLASS_READ_32, n))
312 if ((mask & AUDIT_PERM_ATTR) &&
313 audit_match_class(AUDIT_CLASS_CHATTR_32, n))
317 return mask & ACC_MODE(ctx->argv[1]);
319 return mask & ACC_MODE(ctx->argv[2]);
320 case 4: /* socketcall */
321 return ((mask & AUDIT_PERM_WRITE) && ctx->argv[0] == SYS_BIND);
323 return mask & AUDIT_PERM_EXEC;
329 static int audit_match_filetype(struct audit_context *ctx, int val)
331 struct audit_names *n;
332 umode_t mode = (umode_t)val;
337 list_for_each_entry(n, &ctx->names_list, list) {
338 if ((n->ino != -1) &&
339 ((n->mode & S_IFMT) == mode))
347 * We keep a linked list of fixed-sized (31 pointer) arrays of audit_chunk *;
348 * ->first_trees points to its beginning, ->trees - to the current end of data.
349 * ->tree_count is the number of free entries in array pointed to by ->trees.
350 * Original condition is (NULL, NULL, 0); as soon as it grows we never revert to NULL,
351 * "empty" becomes (p, p, 31) afterwards. We don't shrink the list (and seriously,
352 * it's going to remain 1-element for almost any setup) until we free context itself.
353 * References in it _are_ dropped - at the same time we free/drop aux stuff.
356 #ifdef CONFIG_AUDIT_TREE
357 static void audit_set_auditable(struct audit_context *ctx)
361 ctx->current_state = AUDIT_RECORD_CONTEXT;
365 static int put_tree_ref(struct audit_context *ctx, struct audit_chunk *chunk)
367 struct audit_tree_refs *p = ctx->trees;
368 int left = ctx->tree_count;
370 p->c[--left] = chunk;
371 ctx->tree_count = left;
380 ctx->tree_count = 30;
386 static int grow_tree_refs(struct audit_context *ctx)
388 struct audit_tree_refs *p = ctx->trees;
389 ctx->trees = kzalloc(sizeof(struct audit_tree_refs), GFP_KERNEL);
395 p->next = ctx->trees;
397 ctx->first_trees = ctx->trees;
398 ctx->tree_count = 31;
403 static void unroll_tree_refs(struct audit_context *ctx,
404 struct audit_tree_refs *p, int count)
406 #ifdef CONFIG_AUDIT_TREE
407 struct audit_tree_refs *q;
410 /* we started with empty chain */
411 p = ctx->first_trees;
413 /* if the very first allocation has failed, nothing to do */
418 for (q = p; q != ctx->trees; q = q->next, n = 31) {
420 audit_put_chunk(q->c[n]);
424 while (n-- > ctx->tree_count) {
425 audit_put_chunk(q->c[n]);
429 ctx->tree_count = count;
433 static void free_tree_refs(struct audit_context *ctx)
435 struct audit_tree_refs *p, *q;
436 for (p = ctx->first_trees; p; p = q) {
442 static int match_tree_refs(struct audit_context *ctx, struct audit_tree *tree)
444 #ifdef CONFIG_AUDIT_TREE
445 struct audit_tree_refs *p;
450 for (p = ctx->first_trees; p != ctx->trees; p = p->next) {
451 for (n = 0; n < 31; n++)
452 if (audit_tree_match(p->c[n], tree))
457 for (n = ctx->tree_count; n < 31; n++)
458 if (audit_tree_match(p->c[n], tree))
465 static int audit_compare_uid(kuid_t uid,
466 struct audit_names *name,
467 struct audit_field *f,
468 struct audit_context *ctx)
470 struct audit_names *n;
474 rc = audit_uid_comparator(uid, f->op, name->uid);
480 list_for_each_entry(n, &ctx->names_list, list) {
481 rc = audit_uid_comparator(uid, f->op, n->uid);
489 static int audit_compare_gid(kgid_t gid,
490 struct audit_names *name,
491 struct audit_field *f,
492 struct audit_context *ctx)
494 struct audit_names *n;
498 rc = audit_gid_comparator(gid, f->op, name->gid);
504 list_for_each_entry(n, &ctx->names_list, list) {
505 rc = audit_gid_comparator(gid, f->op, n->gid);
513 static int audit_field_compare(struct task_struct *tsk,
514 const struct cred *cred,
515 struct audit_field *f,
516 struct audit_context *ctx,
517 struct audit_names *name)
520 /* process to file object comparisons */
521 case AUDIT_COMPARE_UID_TO_OBJ_UID:
522 return audit_compare_uid(cred->uid, name, f, ctx);
523 case AUDIT_COMPARE_GID_TO_OBJ_GID:
524 return audit_compare_gid(cred->gid, name, f, ctx);
525 case AUDIT_COMPARE_EUID_TO_OBJ_UID:
526 return audit_compare_uid(cred->euid, name, f, ctx);
527 case AUDIT_COMPARE_EGID_TO_OBJ_GID:
528 return audit_compare_gid(cred->egid, name, f, ctx);
529 case AUDIT_COMPARE_AUID_TO_OBJ_UID:
530 return audit_compare_uid(tsk->loginuid, name, f, ctx);
531 case AUDIT_COMPARE_SUID_TO_OBJ_UID:
532 return audit_compare_uid(cred->suid, name, f, ctx);
533 case AUDIT_COMPARE_SGID_TO_OBJ_GID:
534 return audit_compare_gid(cred->sgid, name, f, ctx);
535 case AUDIT_COMPARE_FSUID_TO_OBJ_UID:
536 return audit_compare_uid(cred->fsuid, name, f, ctx);
537 case AUDIT_COMPARE_FSGID_TO_OBJ_GID:
538 return audit_compare_gid(cred->fsgid, name, f, ctx);
539 /* uid comparisons */
540 case AUDIT_COMPARE_UID_TO_AUID:
541 return audit_uid_comparator(cred->uid, f->op, tsk->loginuid);
542 case AUDIT_COMPARE_UID_TO_EUID:
543 return audit_uid_comparator(cred->uid, f->op, cred->euid);
544 case AUDIT_COMPARE_UID_TO_SUID:
545 return audit_uid_comparator(cred->uid, f->op, cred->suid);
546 case AUDIT_COMPARE_UID_TO_FSUID:
547 return audit_uid_comparator(cred->uid, f->op, cred->fsuid);
548 /* auid comparisons */
549 case AUDIT_COMPARE_AUID_TO_EUID:
550 return audit_uid_comparator(tsk->loginuid, f->op, cred->euid);
551 case AUDIT_COMPARE_AUID_TO_SUID:
552 return audit_uid_comparator(tsk->loginuid, f->op, cred->suid);
553 case AUDIT_COMPARE_AUID_TO_FSUID:
554 return audit_uid_comparator(tsk->loginuid, f->op, cred->fsuid);
555 /* euid comparisons */
556 case AUDIT_COMPARE_EUID_TO_SUID:
557 return audit_uid_comparator(cred->euid, f->op, cred->suid);
558 case AUDIT_COMPARE_EUID_TO_FSUID:
559 return audit_uid_comparator(cred->euid, f->op, cred->fsuid);
560 /* suid comparisons */
561 case AUDIT_COMPARE_SUID_TO_FSUID:
562 return audit_uid_comparator(cred->suid, f->op, cred->fsuid);
563 /* gid comparisons */
564 case AUDIT_COMPARE_GID_TO_EGID:
565 return audit_gid_comparator(cred->gid, f->op, cred->egid);
566 case AUDIT_COMPARE_GID_TO_SGID:
567 return audit_gid_comparator(cred->gid, f->op, cred->sgid);
568 case AUDIT_COMPARE_GID_TO_FSGID:
569 return audit_gid_comparator(cred->gid, f->op, cred->fsgid);
570 /* egid comparisons */
571 case AUDIT_COMPARE_EGID_TO_SGID:
572 return audit_gid_comparator(cred->egid, f->op, cred->sgid);
573 case AUDIT_COMPARE_EGID_TO_FSGID:
574 return audit_gid_comparator(cred->egid, f->op, cred->fsgid);
575 /* sgid comparison */
576 case AUDIT_COMPARE_SGID_TO_FSGID:
577 return audit_gid_comparator(cred->sgid, f->op, cred->fsgid);
579 WARN(1, "Missing AUDIT_COMPARE define. Report as a bug\n");
585 /* Determine if any context name data matches a rule's watch data */
586 /* Compare a task_struct with an audit_rule. Return 1 on match, 0
589 * If task_creation is true, this is an explicit indication that we are
590 * filtering a task rule at task creation time. This and tsk == current are
591 * the only situations where tsk->cred may be accessed without an rcu read lock.
593 static int audit_filter_rules(struct task_struct *tsk,
594 struct audit_krule *rule,
595 struct audit_context *ctx,
596 struct audit_names *name,
597 enum audit_state *state,
600 const struct cred *cred;
604 cred = rcu_dereference_check(tsk->cred, tsk == current || task_creation);
606 for (i = 0; i < rule->field_count; i++) {
607 struct audit_field *f = &rule->fields[i];
608 struct audit_names *n;
613 result = audit_comparator(tsk->pid, f->op, f->val);
618 ctx->ppid = sys_getppid();
619 result = audit_comparator(ctx->ppid, f->op, f->val);
623 result = audit_uid_comparator(cred->uid, f->op, f->uid);
626 result = audit_uid_comparator(cred->euid, f->op, f->uid);
629 result = audit_uid_comparator(cred->suid, f->op, f->uid);
632 result = audit_uid_comparator(cred->fsuid, f->op, f->uid);
635 result = audit_gid_comparator(cred->gid, f->op, f->gid);
636 if (f->op == Audit_equal) {
638 result = in_group_p(f->gid);
639 } else if (f->op == Audit_not_equal) {
641 result = !in_group_p(f->gid);
645 result = audit_gid_comparator(cred->egid, f->op, f->gid);
646 if (f->op == Audit_equal) {
648 result = in_egroup_p(f->gid);
649 } else if (f->op == Audit_not_equal) {
651 result = !in_egroup_p(f->gid);
655 result = audit_gid_comparator(cred->sgid, f->op, f->gid);
658 result = audit_gid_comparator(cred->fsgid, f->op, f->gid);
661 result = audit_comparator(tsk->personality, f->op, f->val);
665 result = audit_comparator(ctx->arch, f->op, f->val);
669 if (ctx && ctx->return_valid)
670 result = audit_comparator(ctx->return_code, f->op, f->val);
673 if (ctx && ctx->return_valid) {
675 result = audit_comparator(ctx->return_valid, f->op, AUDITSC_SUCCESS);
677 result = audit_comparator(ctx->return_valid, f->op, AUDITSC_FAILURE);
682 if (audit_comparator(MAJOR(name->dev), f->op, f->val) ||
683 audit_comparator(MAJOR(name->rdev), f->op, f->val))
686 list_for_each_entry(n, &ctx->names_list, list) {
687 if (audit_comparator(MAJOR(n->dev), f->op, f->val) ||
688 audit_comparator(MAJOR(n->rdev), f->op, f->val)) {
697 if (audit_comparator(MINOR(name->dev), f->op, f->val) ||
698 audit_comparator(MINOR(name->rdev), f->op, f->val))
701 list_for_each_entry(n, &ctx->names_list, list) {
702 if (audit_comparator(MINOR(n->dev), f->op, f->val) ||
703 audit_comparator(MINOR(n->rdev), f->op, f->val)) {
712 result = (name->ino == f->val);
714 list_for_each_entry(n, &ctx->names_list, list) {
715 if (audit_comparator(n->ino, f->op, f->val)) {
724 result = audit_uid_comparator(name->uid, f->op, f->uid);
726 list_for_each_entry(n, &ctx->names_list, list) {
727 if (audit_uid_comparator(n->uid, f->op, f->uid)) {
736 result = audit_gid_comparator(name->gid, f->op, f->gid);
738 list_for_each_entry(n, &ctx->names_list, list) {
739 if (audit_gid_comparator(n->gid, f->op, f->gid)) {
748 result = audit_watch_compare(rule->watch, name->ino, name->dev);
752 result = match_tree_refs(ctx, rule->tree);
757 result = audit_uid_comparator(tsk->loginuid, f->op, f->uid);
759 case AUDIT_SUBJ_USER:
760 case AUDIT_SUBJ_ROLE:
761 case AUDIT_SUBJ_TYPE:
764 /* NOTE: this may return negative values indicating
765 a temporary error. We simply treat this as a
766 match for now to avoid losing information that
767 may be wanted. An error message will also be
771 security_task_getsecid(tsk, &sid);
774 result = security_audit_rule_match(sid, f->type,
783 case AUDIT_OBJ_LEV_LOW:
784 case AUDIT_OBJ_LEV_HIGH:
785 /* The above note for AUDIT_SUBJ_USER...AUDIT_SUBJ_CLR
788 /* Find files that match */
790 result = security_audit_rule_match(
791 name->osid, f->type, f->op,
794 list_for_each_entry(n, &ctx->names_list, list) {
795 if (security_audit_rule_match(n->osid, f->type,
803 /* Find ipc objects that match */
804 if (!ctx || ctx->type != AUDIT_IPC)
806 if (security_audit_rule_match(ctx->ipc.osid,
817 result = audit_comparator(ctx->argv[f->type-AUDIT_ARG0], f->op, f->val);
819 case AUDIT_FILTERKEY:
820 /* ignore this field for filtering */
824 result = audit_match_perm(ctx, f->val);
827 result = audit_match_filetype(ctx, f->val);
829 case AUDIT_FIELD_COMPARE:
830 result = audit_field_compare(tsk, cred, f, ctx, name);
838 if (rule->prio <= ctx->prio)
840 if (rule->filterkey) {
841 kfree(ctx->filterkey);
842 ctx->filterkey = kstrdup(rule->filterkey, GFP_ATOMIC);
844 ctx->prio = rule->prio;
846 switch (rule->action) {
847 case AUDIT_NEVER: *state = AUDIT_DISABLED; break;
848 case AUDIT_ALWAYS: *state = AUDIT_RECORD_CONTEXT; break;
853 /* At process creation time, we can determine if system-call auditing is
854 * completely disabled for this task. Since we only have the task
855 * structure at this point, we can only check uid and gid.
857 static enum audit_state audit_filter_task(struct task_struct *tsk, char **key)
859 struct audit_entry *e;
860 enum audit_state state;
863 list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_TASK], list) {
864 if (audit_filter_rules(tsk, &e->rule, NULL, NULL,
866 if (state == AUDIT_RECORD_CONTEXT)
867 *key = kstrdup(e->rule.filterkey, GFP_ATOMIC);
873 return AUDIT_BUILD_CONTEXT;
876 /* At syscall entry and exit time, this filter is called if the
877 * audit_state is not low enough that auditing cannot take place, but is
878 * also not high enough that we already know we have to write an audit
879 * record (i.e., the state is AUDIT_SETUP_CONTEXT or AUDIT_BUILD_CONTEXT).
881 static enum audit_state audit_filter_syscall(struct task_struct *tsk,
882 struct audit_context *ctx,
883 struct list_head *list)
885 struct audit_entry *e;
886 enum audit_state state;
888 if (audit_pid && tsk->tgid == audit_pid)
889 return AUDIT_DISABLED;
892 if (!list_empty(list)) {
893 int word = AUDIT_WORD(ctx->major);
894 int bit = AUDIT_BIT(ctx->major);
896 list_for_each_entry_rcu(e, list, list) {
897 if ((e->rule.mask[word] & bit) == bit &&
898 audit_filter_rules(tsk, &e->rule, ctx, NULL,
901 ctx->current_state = state;
907 return AUDIT_BUILD_CONTEXT;
911 * Given an audit_name check the inode hash table to see if they match.
912 * Called holding the rcu read lock to protect the use of audit_inode_hash
914 static int audit_filter_inode_name(struct task_struct *tsk,
915 struct audit_names *n,
916 struct audit_context *ctx) {
918 int h = audit_hash_ino((u32)n->ino);
919 struct list_head *list = &audit_inode_hash[h];
920 struct audit_entry *e;
921 enum audit_state state;
923 word = AUDIT_WORD(ctx->major);
924 bit = AUDIT_BIT(ctx->major);
926 if (list_empty(list))
929 list_for_each_entry_rcu(e, list, list) {
930 if ((e->rule.mask[word] & bit) == bit &&
931 audit_filter_rules(tsk, &e->rule, ctx, n, &state, false)) {
932 ctx->current_state = state;
940 /* At syscall exit time, this filter is called if any audit_names have been
941 * collected during syscall processing. We only check rules in sublists at hash
942 * buckets applicable to the inode numbers in audit_names.
943 * Regarding audit_state, same rules apply as for audit_filter_syscall().
945 void audit_filter_inodes(struct task_struct *tsk, struct audit_context *ctx)
947 struct audit_names *n;
949 if (audit_pid && tsk->tgid == audit_pid)
954 list_for_each_entry(n, &ctx->names_list, list) {
955 if (audit_filter_inode_name(tsk, n, ctx))
961 static inline struct audit_context *audit_get_context(struct task_struct *tsk,
965 struct audit_context *context = tsk->audit_context;
969 context->return_valid = return_valid;
972 * we need to fix up the return code in the audit logs if the actual
973 * return codes are later going to be fixed up by the arch specific
976 * This is actually a test for:
977 * (rc == ERESTARTSYS ) || (rc == ERESTARTNOINTR) ||
978 * (rc == ERESTARTNOHAND) || (rc == ERESTART_RESTARTBLOCK)
980 * but is faster than a bunch of ||
982 if (unlikely(return_code <= -ERESTARTSYS) &&
983 (return_code >= -ERESTART_RESTARTBLOCK) &&
984 (return_code != -ENOIOCTLCMD))
985 context->return_code = -EINTR;
987 context->return_code = return_code;
989 if (context->in_syscall && !context->dummy) {
990 audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_EXIT]);
991 audit_filter_inodes(tsk, context);
994 tsk->audit_context = NULL;
998 static inline void audit_free_names(struct audit_context *context)
1000 struct audit_names *n, *next;
1002 #if AUDIT_DEBUG == 2
1003 if (context->put_count + context->ino_count != context->name_count) {
1006 printk(KERN_ERR "%s:%d(:%d): major=%d in_syscall=%d"
1007 " name_count=%d put_count=%d"
1008 " ino_count=%d [NOT freeing]\n",
1010 context->serial, context->major, context->in_syscall,
1011 context->name_count, context->put_count,
1012 context->ino_count);
1013 list_for_each_entry(n, &context->names_list, list) {
1014 printk(KERN_ERR "names[%d] = %p = %s\n", i++,
1015 n->name, n->name->name ?: "(null)");
1022 context->put_count = 0;
1023 context->ino_count = 0;
1026 list_for_each_entry_safe(n, next, &context->names_list, list) {
1028 if (n->name && n->name_put)
1029 final_putname(n->name);
1033 context->name_count = 0;
1034 path_put(&context->pwd);
1035 context->pwd.dentry = NULL;
1036 context->pwd.mnt = NULL;
1039 static inline void audit_free_aux(struct audit_context *context)
1041 struct audit_aux_data *aux;
1043 while ((aux = context->aux)) {
1044 context->aux = aux->next;
1047 while ((aux = context->aux_pids)) {
1048 context->aux_pids = aux->next;
1053 static inline struct audit_context *audit_alloc_context(enum audit_state state)
1055 struct audit_context *context;
1057 context = kzalloc(sizeof(*context), GFP_KERNEL);
1060 context->state = state;
1061 context->prio = state == AUDIT_RECORD_CONTEXT ? ~0ULL : 0;
1062 INIT_LIST_HEAD(&context->killed_trees);
1063 INIT_LIST_HEAD(&context->names_list);
1068 * audit_alloc - allocate an audit context block for a task
1071 * Filter on the task information and allocate a per-task audit context
1072 * if necessary. Doing so turns on system call auditing for the
1073 * specified task. This is called from copy_process, so no lock is
1076 int audit_alloc(struct task_struct *tsk)
1078 struct audit_context *context;
1079 enum audit_state state;
1082 if (likely(!audit_ever_enabled))
1083 return 0; /* Return if not auditing. */
1085 state = audit_filter_task(tsk, &key);
1086 if (state == AUDIT_DISABLED)
1089 if (!(context = audit_alloc_context(state))) {
1091 audit_log_lost("out of memory in audit_alloc");
1094 context->filterkey = key;
1096 tsk->audit_context = context;
1097 set_tsk_thread_flag(tsk, TIF_SYSCALL_AUDIT);
1101 static inline void audit_free_context(struct audit_context *context)
1103 audit_free_names(context);
1104 unroll_tree_refs(context, NULL, 0);
1105 free_tree_refs(context);
1106 audit_free_aux(context);
1107 kfree(context->filterkey);
1108 kfree(context->sockaddr);
1112 void audit_log_task_context(struct audit_buffer *ab)
1119 security_task_getsecid(current, &sid);
1123 error = security_secid_to_secctx(sid, &ctx, &len);
1125 if (error != -EINVAL)
1130 audit_log_format(ab, " subj=%s", ctx);
1131 security_release_secctx(ctx, len);
1135 audit_panic("error in audit_log_task_context");
1139 EXPORT_SYMBOL(audit_log_task_context);
1141 void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
1143 const struct cred *cred;
1144 char name[sizeof(tsk->comm)];
1145 struct mm_struct *mm = tsk->mm;
1151 /* tsk == current */
1152 cred = current_cred();
1154 spin_lock_irq(&tsk->sighand->siglock);
1155 if (tsk->signal && tsk->signal->tty)
1156 tty = tsk->signal->tty->name;
1159 spin_unlock_irq(&tsk->sighand->siglock);
1162 audit_log_format(ab,
1163 " ppid=%ld pid=%d auid=%u uid=%u gid=%u"
1164 " euid=%u suid=%u fsuid=%u"
1165 " egid=%u sgid=%u fsgid=%u ses=%u tty=%s",
1168 from_kuid(&init_user_ns, tsk->loginuid),
1169 from_kuid(&init_user_ns, cred->uid),
1170 from_kgid(&init_user_ns, cred->gid),
1171 from_kuid(&init_user_ns, cred->euid),
1172 from_kuid(&init_user_ns, cred->suid),
1173 from_kuid(&init_user_ns, cred->fsuid),
1174 from_kgid(&init_user_ns, cred->egid),
1175 from_kgid(&init_user_ns, cred->sgid),
1176 from_kgid(&init_user_ns, cred->fsgid),
1177 tsk->sessionid, tty);
1179 get_task_comm(name, tsk);
1180 audit_log_format(ab, " comm=");
1181 audit_log_untrustedstring(ab, name);
1184 down_read(&mm->mmap_sem);
1186 audit_log_d_path(ab, " exe=", &mm->exe_file->f_path);
1187 up_read(&mm->mmap_sem);
1189 audit_log_task_context(ab);
1192 EXPORT_SYMBOL(audit_log_task_info);
1194 static int audit_log_pid_context(struct audit_context *context, pid_t pid,
1195 kuid_t auid, kuid_t uid, unsigned int sessionid,
1196 u32 sid, char *comm)
1198 struct audit_buffer *ab;
1203 ab = audit_log_start(context, GFP_KERNEL, AUDIT_OBJ_PID);
1207 audit_log_format(ab, "opid=%d oauid=%d ouid=%d oses=%d", pid,
1208 from_kuid(&init_user_ns, auid),
1209 from_kuid(&init_user_ns, uid), sessionid);
1211 if (security_secid_to_secctx(sid, &ctx, &len)) {
1212 audit_log_format(ab, " obj=(none)");
1215 audit_log_format(ab, " obj=%s", ctx);
1216 security_release_secctx(ctx, len);
1219 audit_log_format(ab, " ocomm=");
1220 audit_log_untrustedstring(ab, comm);
1227 * to_send and len_sent accounting are very loose estimates. We aren't
1228 * really worried about a hard cap to MAX_EXECVE_AUDIT_LEN so much as being
1229 * within about 500 bytes (next page boundary)
1231 * why snprintf? an int is up to 12 digits long. if we just assumed when
1232 * logging that a[%d]= was going to be 16 characters long we would be wasting
1233 * space in every audit message. In one 7500 byte message we can log up to
1234 * about 1000 min size arguments. That comes down to about 50% waste of space
1235 * if we didn't do the snprintf to find out how long arg_num_len was.
1237 static int audit_log_single_execve_arg(struct audit_context *context,
1238 struct audit_buffer **ab,
1241 const char __user *p,
1244 char arg_num_len_buf[12];
1245 const char __user *tmp_p = p;
1246 /* how many digits are in arg_num? 5 is the length of ' a=""' */
1247 size_t arg_num_len = snprintf(arg_num_len_buf, 12, "%d", arg_num) + 5;
1248 size_t len, len_left, to_send;
1249 size_t max_execve_audit_len = MAX_EXECVE_AUDIT_LEN;
1250 unsigned int i, has_cntl = 0, too_long = 0;
1253 /* strnlen_user includes the null we don't want to send */
1254 len_left = len = strnlen_user(p, MAX_ARG_STRLEN) - 1;
1257 * We just created this mm, if we can't find the strings
1258 * we just copied into it something is _very_ wrong. Similar
1259 * for strings that are too long, we should not have created
1262 if (unlikely((len == -1) || len > MAX_ARG_STRLEN - 1)) {
1264 send_sig(SIGKILL, current, 0);
1268 /* walk the whole argument looking for non-ascii chars */
1270 if (len_left > MAX_EXECVE_AUDIT_LEN)
1271 to_send = MAX_EXECVE_AUDIT_LEN;
1274 ret = copy_from_user(buf, tmp_p, to_send);
1276 * There is no reason for this copy to be short. We just
1277 * copied them here, and the mm hasn't been exposed to user-
1282 send_sig(SIGKILL, current, 0);
1285 buf[to_send] = '\0';
1286 has_cntl = audit_string_contains_control(buf, to_send);
1289 * hex messages get logged as 2 bytes, so we can only
1290 * send half as much in each message
1292 max_execve_audit_len = MAX_EXECVE_AUDIT_LEN / 2;
1295 len_left -= to_send;
1297 } while (len_left > 0);
1301 if (len > max_execve_audit_len)
1304 /* rewalk the argument actually logging the message */
1305 for (i = 0; len_left > 0; i++) {
1308 if (len_left > max_execve_audit_len)
1309 to_send = max_execve_audit_len;
1313 /* do we have space left to send this argument in this ab? */
1314 room_left = MAX_EXECVE_AUDIT_LEN - arg_num_len - *len_sent;
1316 room_left -= (to_send * 2);
1318 room_left -= to_send;
1319 if (room_left < 0) {
1322 *ab = audit_log_start(context, GFP_KERNEL, AUDIT_EXECVE);
1328 * first record needs to say how long the original string was
1329 * so we can be sure nothing was lost.
1331 if ((i == 0) && (too_long))
1332 audit_log_format(*ab, " a%d_len=%zu", arg_num,
1333 has_cntl ? 2*len : len);
1336 * normally arguments are small enough to fit and we already
1337 * filled buf above when we checked for control characters
1338 * so don't bother with another copy_from_user
1340 if (len >= max_execve_audit_len)
1341 ret = copy_from_user(buf, p, to_send);
1346 send_sig(SIGKILL, current, 0);
1349 buf[to_send] = '\0';
1351 /* actually log it */
1352 audit_log_format(*ab, " a%d", arg_num);
1354 audit_log_format(*ab, "[%d]", i);
1355 audit_log_format(*ab, "=");
1357 audit_log_n_hex(*ab, buf, to_send);
1359 audit_log_string(*ab, buf);
1362 len_left -= to_send;
1363 *len_sent += arg_num_len;
1365 *len_sent += to_send * 2;
1367 *len_sent += to_send;
1369 /* include the null we didn't log */
1373 static void audit_log_execve_info(struct audit_context *context,
1374 struct audit_buffer **ab,
1375 struct audit_aux_data_execve *axi)
1378 size_t len_sent = 0;
1379 const char __user *p;
1382 if (axi->mm != current->mm)
1383 return; /* execve failed, no additional info */
1385 p = (const char __user *)axi->mm->arg_start;
1387 audit_log_format(*ab, "argc=%d", axi->argc);
1390 * we need some kernel buffer to hold the userspace args. Just
1391 * allocate one big one rather than allocating one of the right size
1392 * for every single argument inside audit_log_single_execve_arg()
1393 * should be <8k allocation so should be pretty safe.
1395 buf = kmalloc(MAX_EXECVE_AUDIT_LEN + 1, GFP_KERNEL);
1397 audit_panic("out of memory for argv string\n");
1401 for (i = 0; i < axi->argc; i++) {
1402 len = audit_log_single_execve_arg(context, ab, i,
1411 static void audit_log_cap(struct audit_buffer *ab, char *prefix, kernel_cap_t *cap)
1415 audit_log_format(ab, " %s=", prefix);
1416 CAP_FOR_EACH_U32(i) {
1417 audit_log_format(ab, "%08x", cap->cap[(_KERNEL_CAPABILITY_U32S-1) - i]);
1421 static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
1423 kernel_cap_t *perm = &name->fcap.permitted;
1424 kernel_cap_t *inh = &name->fcap.inheritable;
1427 if (!cap_isclear(*perm)) {
1428 audit_log_cap(ab, "cap_fp", perm);
1431 if (!cap_isclear(*inh)) {
1432 audit_log_cap(ab, "cap_fi", inh);
1437 audit_log_format(ab, " cap_fe=%d cap_fver=%x", name->fcap.fE, name->fcap_ver);
1440 static void show_special(struct audit_context *context, int *call_panic)
1442 struct audit_buffer *ab;
1445 ab = audit_log_start(context, GFP_KERNEL, context->type);
1449 switch (context->type) {
1450 case AUDIT_SOCKETCALL: {
1451 int nargs = context->socketcall.nargs;
1452 audit_log_format(ab, "nargs=%d", nargs);
1453 for (i = 0; i < nargs; i++)
1454 audit_log_format(ab, " a%d=%lx", i,
1455 context->socketcall.args[i]);
1458 u32 osid = context->ipc.osid;
1460 audit_log_format(ab, "ouid=%u ogid=%u mode=%#ho",
1461 from_kuid(&init_user_ns, context->ipc.uid),
1462 from_kgid(&init_user_ns, context->ipc.gid),
1467 if (security_secid_to_secctx(osid, &ctx, &len)) {
1468 audit_log_format(ab, " osid=%u", osid);
1471 audit_log_format(ab, " obj=%s", ctx);
1472 security_release_secctx(ctx, len);
1475 if (context->ipc.has_perm) {
1477 ab = audit_log_start(context, GFP_KERNEL,
1478 AUDIT_IPC_SET_PERM);
1481 audit_log_format(ab,
1482 "qbytes=%lx ouid=%u ogid=%u mode=%#ho",
1483 context->ipc.qbytes,
1484 context->ipc.perm_uid,
1485 context->ipc.perm_gid,
1486 context->ipc.perm_mode);
1489 case AUDIT_MQ_OPEN: {
1490 audit_log_format(ab,
1491 "oflag=0x%x mode=%#ho mq_flags=0x%lx mq_maxmsg=%ld "
1492 "mq_msgsize=%ld mq_curmsgs=%ld",
1493 context->mq_open.oflag, context->mq_open.mode,
1494 context->mq_open.attr.mq_flags,
1495 context->mq_open.attr.mq_maxmsg,
1496 context->mq_open.attr.mq_msgsize,
1497 context->mq_open.attr.mq_curmsgs);
1499 case AUDIT_MQ_SENDRECV: {
1500 audit_log_format(ab,
1501 "mqdes=%d msg_len=%zd msg_prio=%u "
1502 "abs_timeout_sec=%ld abs_timeout_nsec=%ld",
1503 context->mq_sendrecv.mqdes,
1504 context->mq_sendrecv.msg_len,
1505 context->mq_sendrecv.msg_prio,
1506 context->mq_sendrecv.abs_timeout.tv_sec,
1507 context->mq_sendrecv.abs_timeout.tv_nsec);
1509 case AUDIT_MQ_NOTIFY: {
1510 audit_log_format(ab, "mqdes=%d sigev_signo=%d",
1511 context->mq_notify.mqdes,
1512 context->mq_notify.sigev_signo);
1514 case AUDIT_MQ_GETSETATTR: {
1515 struct mq_attr *attr = &context->mq_getsetattr.mqstat;
1516 audit_log_format(ab,
1517 "mqdes=%d mq_flags=0x%lx mq_maxmsg=%ld mq_msgsize=%ld "
1519 context->mq_getsetattr.mqdes,
1520 attr->mq_flags, attr->mq_maxmsg,
1521 attr->mq_msgsize, attr->mq_curmsgs);
1523 case AUDIT_CAPSET: {
1524 audit_log_format(ab, "pid=%d", context->capset.pid);
1525 audit_log_cap(ab, "cap_pi", &context->capset.cap.inheritable);
1526 audit_log_cap(ab, "cap_pp", &context->capset.cap.permitted);
1527 audit_log_cap(ab, "cap_pe", &context->capset.cap.effective);
1530 audit_log_format(ab, "fd=%d flags=0x%x", context->mmap.fd,
1531 context->mmap.flags);
1537 static void audit_log_name(struct audit_context *context, struct audit_names *n,
1538 int record_num, int *call_panic)
1540 struct audit_buffer *ab;
1541 ab = audit_log_start(context, GFP_KERNEL, AUDIT_PATH);
1543 return; /* audit_panic has been called */
1545 audit_log_format(ab, "item=%d", record_num);
1548 switch (n->name_len) {
1549 case AUDIT_NAME_FULL:
1550 /* log the full path */
1551 audit_log_format(ab, " name=");
1552 audit_log_untrustedstring(ab, n->name->name);
1555 /* name was specified as a relative path and the
1556 * directory component is the cwd */
1557 audit_log_d_path(ab, " name=", &context->pwd);
1560 /* log the name's directory component */
1561 audit_log_format(ab, " name=");
1562 audit_log_n_untrustedstring(ab, n->name->name,
1566 audit_log_format(ab, " name=(null)");
1568 if (n->ino != (unsigned long)-1) {
1569 audit_log_format(ab, " inode=%lu"
1570 " dev=%02x:%02x mode=%#ho"
1571 " ouid=%u ogid=%u rdev=%02x:%02x",
1576 from_kuid(&init_user_ns, n->uid),
1577 from_kgid(&init_user_ns, n->gid),
1584 if (security_secid_to_secctx(
1585 n->osid, &ctx, &len)) {
1586 audit_log_format(ab, " osid=%u", n->osid);
1589 audit_log_format(ab, " obj=%s", ctx);
1590 security_release_secctx(ctx, len);
1594 audit_log_fcaps(ab, n);
1599 static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
1601 int i, call_panic = 0;
1602 struct audit_buffer *ab;
1603 struct audit_aux_data *aux;
1604 struct audit_names *n;
1606 /* tsk == current */
1607 context->personality = tsk->personality;
1609 ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
1611 return; /* audit_panic has been called */
1612 audit_log_format(ab, "arch=%x syscall=%d",
1613 context->arch, context->major);
1614 if (context->personality != PER_LINUX)
1615 audit_log_format(ab, " per=%lx", context->personality);
1616 if (context->return_valid)
1617 audit_log_format(ab, " success=%s exit=%ld",
1618 (context->return_valid==AUDITSC_SUCCESS)?"yes":"no",
1619 context->return_code);
1621 audit_log_format(ab,
1622 " a0=%lx a1=%lx a2=%lx a3=%lx items=%d",
1627 context->name_count);
1629 audit_log_task_info(ab, tsk);
1630 audit_log_key(ab, context->filterkey);
1633 for (aux = context->aux; aux; aux = aux->next) {
1635 ab = audit_log_start(context, GFP_KERNEL, aux->type);
1637 continue; /* audit_panic has been called */
1639 switch (aux->type) {
1641 case AUDIT_EXECVE: {
1642 struct audit_aux_data_execve *axi = (void *)aux;
1643 audit_log_execve_info(context, &ab, axi);
1646 case AUDIT_BPRM_FCAPS: {
1647 struct audit_aux_data_bprm_fcaps *axs = (void *)aux;
1648 audit_log_format(ab, "fver=%x", axs->fcap_ver);
1649 audit_log_cap(ab, "fp", &axs->fcap.permitted);
1650 audit_log_cap(ab, "fi", &axs->fcap.inheritable);
1651 audit_log_format(ab, " fe=%d", axs->fcap.fE);
1652 audit_log_cap(ab, "old_pp", &axs->old_pcap.permitted);
1653 audit_log_cap(ab, "old_pi", &axs->old_pcap.inheritable);
1654 audit_log_cap(ab, "old_pe", &axs->old_pcap.effective);
1655 audit_log_cap(ab, "new_pp", &axs->new_pcap.permitted);
1656 audit_log_cap(ab, "new_pi", &axs->new_pcap.inheritable);
1657 audit_log_cap(ab, "new_pe", &axs->new_pcap.effective);
1665 show_special(context, &call_panic);
1667 if (context->fds[0] >= 0) {
1668 ab = audit_log_start(context, GFP_KERNEL, AUDIT_FD_PAIR);
1670 audit_log_format(ab, "fd0=%d fd1=%d",
1671 context->fds[0], context->fds[1]);
1676 if (context->sockaddr_len) {
1677 ab = audit_log_start(context, GFP_KERNEL, AUDIT_SOCKADDR);
1679 audit_log_format(ab, "saddr=");
1680 audit_log_n_hex(ab, (void *)context->sockaddr,
1681 context->sockaddr_len);
1686 for (aux = context->aux_pids; aux; aux = aux->next) {
1687 struct audit_aux_data_pids *axs = (void *)aux;
1689 for (i = 0; i < axs->pid_count; i++)
1690 if (audit_log_pid_context(context, axs->target_pid[i],
1691 axs->target_auid[i],
1693 axs->target_sessionid[i],
1695 axs->target_comm[i]))
1699 if (context->target_pid &&
1700 audit_log_pid_context(context, context->target_pid,
1701 context->target_auid, context->target_uid,
1702 context->target_sessionid,
1703 context->target_sid, context->target_comm))
1706 if (context->pwd.dentry && context->pwd.mnt) {
1707 ab = audit_log_start(context, GFP_KERNEL, AUDIT_CWD);
1709 audit_log_d_path(ab, " cwd=", &context->pwd);
1715 list_for_each_entry(n, &context->names_list, list)
1716 audit_log_name(context, n, i++, &call_panic);
1718 /* Send end of event record to help user space know we are finished */
1719 ab = audit_log_start(context, GFP_KERNEL, AUDIT_EOE);
1723 audit_panic("error converting sid to string");
1727 * audit_free - free a per-task audit context
1728 * @tsk: task whose audit context block to free
1730 * Called from copy_process and do_exit
1732 void __audit_free(struct task_struct *tsk)
1734 struct audit_context *context;
1736 context = audit_get_context(tsk, 0, 0);
1740 /* Check for system calls that do not go through the exit
1741 * function (e.g., exit_group), then free context block.
1742 * We use GFP_ATOMIC here because we might be doing this
1743 * in the context of the idle thread */
1744 /* that can happen only if we are called from do_exit() */
1745 if (context->in_syscall && context->current_state == AUDIT_RECORD_CONTEXT)
1746 audit_log_exit(context, tsk);
1747 if (!list_empty(&context->killed_trees))
1748 audit_kill_trees(&context->killed_trees);
1750 audit_free_context(context);
1754 * audit_syscall_entry - fill in an audit record at syscall entry
1755 * @arch: architecture type
1756 * @major: major syscall type (function)
1757 * @a1: additional syscall register 1
1758 * @a2: additional syscall register 2
1759 * @a3: additional syscall register 3
1760 * @a4: additional syscall register 4
1762 * Fill in audit context at syscall entry. This only happens if the
1763 * audit context was created when the task was created and the state or
1764 * filters demand the audit context be built. If the state from the
1765 * per-task filter or from the per-syscall filter is AUDIT_RECORD_CONTEXT,
1766 * then the record will be written at syscall exit time (otherwise, it
1767 * will only be written if another part of the kernel requests that it
1770 void __audit_syscall_entry(int arch, int major,
1771 unsigned long a1, unsigned long a2,
1772 unsigned long a3, unsigned long a4)
1774 struct task_struct *tsk = current;
1775 struct audit_context *context = tsk->audit_context;
1776 enum audit_state state;
1781 BUG_ON(context->in_syscall || context->name_count);
1786 context->arch = arch;
1787 context->major = major;
1788 context->argv[0] = a1;
1789 context->argv[1] = a2;
1790 context->argv[2] = a3;
1791 context->argv[3] = a4;
1793 state = context->state;
1794 context->dummy = !audit_n_rules;
1795 if (!context->dummy && state == AUDIT_BUILD_CONTEXT) {
1797 state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_ENTRY]);
1799 if (state == AUDIT_DISABLED)
1802 context->serial = 0;
1803 context->ctime = CURRENT_TIME;
1804 context->in_syscall = 1;
1805 context->current_state = state;
1810 * audit_syscall_exit - deallocate audit context after a system call
1811 * @success: success value of the syscall
1812 * @return_code: return value of the syscall
1814 * Tear down after system call. If the audit context has been marked as
1815 * auditable (either because of the AUDIT_RECORD_CONTEXT state from
1816 * filtering, or because some other part of the kernel wrote an audit
1817 * message), then write out the syscall information. In call cases,
1818 * free the names stored from getname().
1820 void __audit_syscall_exit(int success, long return_code)
1822 struct task_struct *tsk = current;
1823 struct audit_context *context;
1826 success = AUDITSC_SUCCESS;
1828 success = AUDITSC_FAILURE;
1830 context = audit_get_context(tsk, success, return_code);
1834 if (context->in_syscall && context->current_state == AUDIT_RECORD_CONTEXT)
1835 audit_log_exit(context, tsk);
1837 context->in_syscall = 0;
1838 context->prio = context->state == AUDIT_RECORD_CONTEXT ? ~0ULL : 0;
1840 if (!list_empty(&context->killed_trees))
1841 audit_kill_trees(&context->killed_trees);
1843 audit_free_names(context);
1844 unroll_tree_refs(context, NULL, 0);
1845 audit_free_aux(context);
1846 context->aux = NULL;
1847 context->aux_pids = NULL;
1848 context->target_pid = 0;
1849 context->target_sid = 0;
1850 context->sockaddr_len = 0;
1852 context->fds[0] = -1;
1853 if (context->state != AUDIT_RECORD_CONTEXT) {
1854 kfree(context->filterkey);
1855 context->filterkey = NULL;
1857 tsk->audit_context = context;
1860 static inline void handle_one(const struct inode *inode)
1862 #ifdef CONFIG_AUDIT_TREE
1863 struct audit_context *context;
1864 struct audit_tree_refs *p;
1865 struct audit_chunk *chunk;
1867 if (likely(hlist_empty(&inode->i_fsnotify_marks)))
1869 context = current->audit_context;
1871 count = context->tree_count;
1873 chunk = audit_tree_lookup(inode);
1877 if (likely(put_tree_ref(context, chunk)))
1879 if (unlikely(!grow_tree_refs(context))) {
1880 printk(KERN_WARNING "out of memory, audit has lost a tree reference\n");
1881 audit_set_auditable(context);
1882 audit_put_chunk(chunk);
1883 unroll_tree_refs(context, p, count);
1886 put_tree_ref(context, chunk);
1890 static void handle_path(const struct dentry *dentry)
1892 #ifdef CONFIG_AUDIT_TREE
1893 struct audit_context *context;
1894 struct audit_tree_refs *p;
1895 const struct dentry *d, *parent;
1896 struct audit_chunk *drop;
1900 context = current->audit_context;
1902 count = context->tree_count;
1907 seq = read_seqbegin(&rename_lock);
1909 struct inode *inode = d->d_inode;
1910 if (inode && unlikely(!hlist_empty(&inode->i_fsnotify_marks))) {
1911 struct audit_chunk *chunk;
1912 chunk = audit_tree_lookup(inode);
1914 if (unlikely(!put_tree_ref(context, chunk))) {
1920 parent = d->d_parent;
1925 if (unlikely(read_seqretry(&rename_lock, seq) || drop)) { /* in this order */
1928 /* just a race with rename */
1929 unroll_tree_refs(context, p, count);
1932 audit_put_chunk(drop);
1933 if (grow_tree_refs(context)) {
1934 /* OK, got more space */
1935 unroll_tree_refs(context, p, count);
1940 "out of memory, audit has lost a tree reference\n");
1941 unroll_tree_refs(context, p, count);
1942 audit_set_auditable(context);
1949 static struct audit_names *audit_alloc_name(struct audit_context *context,
1952 struct audit_names *aname;
1954 if (context->name_count < AUDIT_NAMES) {
1955 aname = &context->preallocated_names[context->name_count];
1956 memset(aname, 0, sizeof(*aname));
1958 aname = kzalloc(sizeof(*aname), GFP_NOFS);
1961 aname->should_free = true;
1964 aname->ino = (unsigned long)-1;
1966 list_add_tail(&aname->list, &context->names_list);
1968 context->name_count++;
1970 context->ino_count++;
1976 * audit_reusename - fill out filename with info from existing entry
1977 * @uptr: userland ptr to pathname
1979 * Search the audit_names list for the current audit context. If there is an
1980 * existing entry with a matching "uptr" then return the filename
1981 * associated with that audit_name. If not, return NULL.
1984 __audit_reusename(const __user char *uptr)
1986 struct audit_context *context = current->audit_context;
1987 struct audit_names *n;
1989 list_for_each_entry(n, &context->names_list, list) {
1992 if (n->name->uptr == uptr)
1999 * audit_getname - add a name to the list
2000 * @name: name to add
2002 * Add a name to the list of audit names for this context.
2003 * Called from fs/namei.c:getname().
2005 void __audit_getname(struct filename *name)
2007 struct audit_context *context = current->audit_context;
2008 struct audit_names *n;
2010 if (!context->in_syscall) {
2011 #if AUDIT_DEBUG == 2
2012 printk(KERN_ERR "%s:%d(:%d): ignoring getname(%p)\n",
2013 __FILE__, __LINE__, context->serial, name);
2020 /* The filename _must_ have a populated ->name */
2021 BUG_ON(!name->name);
2024 n = audit_alloc_name(context, AUDIT_TYPE_UNKNOWN);
2029 n->name_len = AUDIT_NAME_FULL;
2033 if (!context->pwd.dentry)
2034 get_fs_pwd(current->fs, &context->pwd);
2037 /* audit_putname - intercept a putname request
2038 * @name: name to intercept and delay for putname
2040 * If we have stored the name from getname in the audit context,
2041 * then we delay the putname until syscall exit.
2042 * Called from include/linux/fs.h:putname().
2044 void audit_putname(struct filename *name)
2046 struct audit_context *context = current->audit_context;
2049 if (!context->in_syscall) {
2050 #if AUDIT_DEBUG == 2
2051 printk(KERN_ERR "%s:%d(:%d): final_putname(%p)\n",
2052 __FILE__, __LINE__, context->serial, name);
2053 if (context->name_count) {
2054 struct audit_names *n;
2057 list_for_each_entry(n, &context->names_list, list)
2058 printk(KERN_ERR "name[%d] = %p = %s\n", i++,
2059 n->name, n->name->name ?: "(null)");
2062 final_putname(name);
2066 ++context->put_count;
2067 if (context->put_count > context->name_count) {
2068 printk(KERN_ERR "%s:%d(:%d): major=%d"
2069 " in_syscall=%d putname(%p) name_count=%d"
2072 context->serial, context->major,
2073 context->in_syscall, name->name,
2074 context->name_count, context->put_count);
2081 static inline int audit_copy_fcaps(struct audit_names *name, const struct dentry *dentry)
2083 struct cpu_vfs_cap_data caps;
2089 rc = get_vfs_caps_from_disk(dentry, &caps);
2093 name->fcap.permitted = caps.permitted;
2094 name->fcap.inheritable = caps.inheritable;
2095 name->fcap.fE = !!(caps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
2096 name->fcap_ver = (caps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
2102 /* Copy inode data into an audit_names. */
2103 static void audit_copy_inode(struct audit_names *name, const struct dentry *dentry,
2104 const struct inode *inode)
2106 name->ino = inode->i_ino;
2107 name->dev = inode->i_sb->s_dev;
2108 name->mode = inode->i_mode;
2109 name->uid = inode->i_uid;
2110 name->gid = inode->i_gid;
2111 name->rdev = inode->i_rdev;
2112 security_inode_getsecid(inode, &name->osid);
2113 audit_copy_fcaps(name, dentry);
2117 * __audit_inode - store the inode and device from a lookup
2118 * @name: name being audited
2119 * @dentry: dentry being audited
2120 * @parent: does this dentry represent the parent?
2122 void __audit_inode(struct filename *name, const struct dentry *dentry,
2123 unsigned int parent)
2125 struct audit_context *context = current->audit_context;
2126 const struct inode *inode = dentry->d_inode;
2127 struct audit_names *n;
2129 if (!context->in_syscall)
2136 /* The struct filename _must_ have a populated ->name */
2137 BUG_ON(!name->name);
2140 * If we have a pointer to an audit_names entry already, then we can
2141 * just use it directly if the type is correct.
2146 if (n->type == AUDIT_TYPE_PARENT ||
2147 n->type == AUDIT_TYPE_UNKNOWN)
2150 if (n->type != AUDIT_TYPE_PARENT)
2155 list_for_each_entry_reverse(n, &context->names_list, list) {
2156 /* does the name pointer match? */
2157 if (!n->name || n->name->name != name->name)
2160 /* match the correct record type */
2162 if (n->type == AUDIT_TYPE_PARENT ||
2163 n->type == AUDIT_TYPE_UNKNOWN)
2166 if (n->type != AUDIT_TYPE_PARENT)
2172 /* unable to find the name from a previous getname(). Allocate a new
2175 n = audit_alloc_name(context, AUDIT_TYPE_NORMAL);
2180 n->name_len = n->name ? parent_len(n->name->name) : AUDIT_NAME_FULL;
2181 n->type = AUDIT_TYPE_PARENT;
2183 n->name_len = AUDIT_NAME_FULL;
2184 n->type = AUDIT_TYPE_NORMAL;
2186 handle_path(dentry);
2187 audit_copy_inode(n, dentry, inode);
2191 * __audit_inode_child - collect inode info for created/removed objects
2192 * @parent: inode of dentry parent
2193 * @dentry: dentry being audited
2194 * @type: AUDIT_TYPE_* value that we're looking for
2196 * For syscalls that create or remove filesystem objects, audit_inode
2197 * can only collect information for the filesystem object's parent.
2198 * This call updates the audit context with the child's information.
2199 * Syscalls that create a new filesystem object must be hooked after
2200 * the object is created. Syscalls that remove a filesystem object
2201 * must be hooked prior, in order to capture the target inode during
2202 * unsuccessful attempts.
2204 void __audit_inode_child(const struct inode *parent,
2205 const struct dentry *dentry,
2206 const unsigned char type)
2208 struct audit_context *context = current->audit_context;
2209 const struct inode *inode = dentry->d_inode;
2210 const char *dname = dentry->d_name.name;
2211 struct audit_names *n, *found_parent = NULL, *found_child = NULL;
2213 if (!context->in_syscall)
2219 /* look for a parent entry first */
2220 list_for_each_entry(n, &context->names_list, list) {
2221 if (!n->name || n->type != AUDIT_TYPE_PARENT)
2224 if (n->ino == parent->i_ino &&
2225 !audit_compare_dname_path(dname, n->name->name, n->name_len)) {
2231 /* is there a matching child entry? */
2232 list_for_each_entry(n, &context->names_list, list) {
2233 /* can only match entries that have a name */
2234 if (!n->name || n->type != type)
2237 /* if we found a parent, make sure this one is a child of it */
2238 if (found_parent && (n->name != found_parent->name))
2241 if (!strcmp(dname, n->name->name) ||
2242 !audit_compare_dname_path(dname, n->name->name,
2244 found_parent->name_len :
2251 if (!found_parent) {
2252 /* create a new, "anonymous" parent record */
2253 n = audit_alloc_name(context, AUDIT_TYPE_PARENT);
2256 audit_copy_inode(n, NULL, parent);
2260 found_child = audit_alloc_name(context, type);
2264 /* Re-use the name belonging to the slot for a matching parent
2265 * directory. All names for this context are relinquished in
2266 * audit_free_names() */
2268 found_child->name = found_parent->name;
2269 found_child->name_len = AUDIT_NAME_FULL;
2270 /* don't call __putname() */
2271 found_child->name_put = false;
2275 audit_copy_inode(found_child, dentry, inode);
2277 found_child->ino = (unsigned long)-1;
2279 EXPORT_SYMBOL_GPL(__audit_inode_child);
2282 * auditsc_get_stamp - get local copies of audit_context values
2283 * @ctx: audit_context for the task
2284 * @t: timespec to store time recorded in the audit_context
2285 * @serial: serial value that is recorded in the audit_context
2287 * Also sets the context as auditable.
2289 int auditsc_get_stamp(struct audit_context *ctx,
2290 struct timespec *t, unsigned int *serial)
2292 if (!ctx->in_syscall)
2295 ctx->serial = audit_serial();
2296 t->tv_sec = ctx->ctime.tv_sec;
2297 t->tv_nsec = ctx->ctime.tv_nsec;
2298 *serial = ctx->serial;
2301 ctx->current_state = AUDIT_RECORD_CONTEXT;
2306 /* global counter which is incremented every time something logs in */
2307 static atomic_t session_id = ATOMIC_INIT(0);
2310 * audit_set_loginuid - set current task's audit_context loginuid
2311 * @loginuid: loginuid value
2315 * Called (set) from fs/proc/base.c::proc_loginuid_write().
2317 int audit_set_loginuid(kuid_t loginuid)
2319 struct task_struct *task = current;
2320 struct audit_context *context = task->audit_context;
2321 unsigned int sessionid;
2323 #ifdef CONFIG_AUDIT_LOGINUID_IMMUTABLE
2324 if (uid_valid(task->loginuid))
2326 #else /* CONFIG_AUDIT_LOGINUID_IMMUTABLE */
2327 if (!capable(CAP_AUDIT_CONTROL))
2329 #endif /* CONFIG_AUDIT_LOGINUID_IMMUTABLE */
2331 sessionid = atomic_inc_return(&session_id);
2332 if (context && context->in_syscall) {
2333 struct audit_buffer *ab;
2335 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_LOGIN);
2337 audit_log_format(ab, "login pid=%d uid=%u "
2338 "old auid=%u new auid=%u"
2339 " old ses=%u new ses=%u",
2341 from_kuid(&init_user_ns, task_uid(task)),
2342 from_kuid(&init_user_ns, task->loginuid),
2343 from_kuid(&init_user_ns, loginuid),
2344 task->sessionid, sessionid);
2348 task->sessionid = sessionid;
2349 task->loginuid = loginuid;
2354 * __audit_mq_open - record audit data for a POSIX MQ open
2357 * @attr: queue attributes
2360 void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
2362 struct audit_context *context = current->audit_context;
2365 memcpy(&context->mq_open.attr, attr, sizeof(struct mq_attr));
2367 memset(&context->mq_open.attr, 0, sizeof(struct mq_attr));
2369 context->mq_open.oflag = oflag;
2370 context->mq_open.mode = mode;
2372 context->type = AUDIT_MQ_OPEN;
2376 * __audit_mq_sendrecv - record audit data for a POSIX MQ timed send/receive
2377 * @mqdes: MQ descriptor
2378 * @msg_len: Message length
2379 * @msg_prio: Message priority
2380 * @abs_timeout: Message timeout in absolute time
2383 void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio,
2384 const struct timespec *abs_timeout)
2386 struct audit_context *context = current->audit_context;
2387 struct timespec *p = &context->mq_sendrecv.abs_timeout;
2390 memcpy(p, abs_timeout, sizeof(struct timespec));
2392 memset(p, 0, sizeof(struct timespec));
2394 context->mq_sendrecv.mqdes = mqdes;
2395 context->mq_sendrecv.msg_len = msg_len;
2396 context->mq_sendrecv.msg_prio = msg_prio;
2398 context->type = AUDIT_MQ_SENDRECV;
2402 * __audit_mq_notify - record audit data for a POSIX MQ notify
2403 * @mqdes: MQ descriptor
2404 * @notification: Notification event
2408 void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
2410 struct audit_context *context = current->audit_context;
2413 context->mq_notify.sigev_signo = notification->sigev_signo;
2415 context->mq_notify.sigev_signo = 0;
2417 context->mq_notify.mqdes = mqdes;
2418 context->type = AUDIT_MQ_NOTIFY;
2422 * __audit_mq_getsetattr - record audit data for a POSIX MQ get/set attribute
2423 * @mqdes: MQ descriptor
2427 void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
2429 struct audit_context *context = current->audit_context;
2430 context->mq_getsetattr.mqdes = mqdes;
2431 context->mq_getsetattr.mqstat = *mqstat;
2432 context->type = AUDIT_MQ_GETSETATTR;
2436 * audit_ipc_obj - record audit data for ipc object
2437 * @ipcp: ipc permissions
2440 void __audit_ipc_obj(struct kern_ipc_perm *ipcp)
2442 struct audit_context *context = current->audit_context;
2443 context->ipc.uid = ipcp->uid;
2444 context->ipc.gid = ipcp->gid;
2445 context->ipc.mode = ipcp->mode;
2446 context->ipc.has_perm = 0;
2447 security_ipc_getsecid(ipcp, &context->ipc.osid);
2448 context->type = AUDIT_IPC;
2452 * audit_ipc_set_perm - record audit data for new ipc permissions
2453 * @qbytes: msgq bytes
2454 * @uid: msgq user id
2455 * @gid: msgq group id
2456 * @mode: msgq mode (permissions)
2458 * Called only after audit_ipc_obj().
2460 void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
2462 struct audit_context *context = current->audit_context;
2464 context->ipc.qbytes = qbytes;
2465 context->ipc.perm_uid = uid;
2466 context->ipc.perm_gid = gid;
2467 context->ipc.perm_mode = mode;
2468 context->ipc.has_perm = 1;
2471 int __audit_bprm(struct linux_binprm *bprm)
2473 struct audit_aux_data_execve *ax;
2474 struct audit_context *context = current->audit_context;
2476 ax = kmalloc(sizeof(*ax), GFP_KERNEL);
2480 ax->argc = bprm->argc;
2481 ax->envc = bprm->envc;
2483 ax->d.type = AUDIT_EXECVE;
2484 ax->d.next = context->aux;
2485 context->aux = (void *)ax;
2491 * audit_socketcall - record audit data for sys_socketcall
2492 * @nargs: number of args, which should not be more than AUDITSC_ARGS.
2496 int __audit_socketcall(int nargs, unsigned long *args)
2498 struct audit_context *context = current->audit_context;
2500 if (nargs <= 0 || nargs > AUDITSC_ARGS || !args)
2502 context->type = AUDIT_SOCKETCALL;
2503 context->socketcall.nargs = nargs;
2504 memcpy(context->socketcall.args, args, nargs * sizeof(unsigned long));
2509 * __audit_fd_pair - record audit data for pipe and socketpair
2510 * @fd1: the first file descriptor
2511 * @fd2: the second file descriptor
2514 void __audit_fd_pair(int fd1, int fd2)
2516 struct audit_context *context = current->audit_context;
2517 context->fds[0] = fd1;
2518 context->fds[1] = fd2;
2522 * audit_sockaddr - record audit data for sys_bind, sys_connect, sys_sendto
2523 * @len: data length in user space
2524 * @a: data address in kernel space
2526 * Returns 0 for success or NULL context or < 0 on error.
2528 int __audit_sockaddr(int len, void *a)
2530 struct audit_context *context = current->audit_context;
2532 if (!context->sockaddr) {
2533 void *p = kmalloc(sizeof(struct sockaddr_storage), GFP_KERNEL);
2536 context->sockaddr = p;
2539 context->sockaddr_len = len;
2540 memcpy(context->sockaddr, a, len);
2544 void __audit_ptrace(struct task_struct *t)
2546 struct audit_context *context = current->audit_context;
2548 context->target_pid = t->pid;
2549 context->target_auid = audit_get_loginuid(t);
2550 context->target_uid = task_uid(t);
2551 context->target_sessionid = audit_get_sessionid(t);
2552 security_task_getsecid(t, &context->target_sid);
2553 memcpy(context->target_comm, t->comm, TASK_COMM_LEN);
2557 * audit_signal_info - record signal info for shutting down audit subsystem
2558 * @sig: signal value
2559 * @t: task being signaled
2561 * If the audit subsystem is being terminated, record the task (pid)
2562 * and uid that is doing that.
2564 int __audit_signal_info(int sig, struct task_struct *t)
2566 struct audit_aux_data_pids *axp;
2567 struct task_struct *tsk = current;
2568 struct audit_context *ctx = tsk->audit_context;
2569 kuid_t uid = current_uid(), t_uid = task_uid(t);
2571 if (audit_pid && t->tgid == audit_pid) {
2572 if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1 || sig == SIGUSR2) {
2573 audit_sig_pid = tsk->pid;
2574 if (uid_valid(tsk->loginuid))
2575 audit_sig_uid = tsk->loginuid;
2577 audit_sig_uid = uid;
2578 security_task_getsecid(tsk, &audit_sig_sid);
2580 if (!audit_signals || audit_dummy_context())
2584 /* optimize the common case by putting first signal recipient directly
2585 * in audit_context */
2586 if (!ctx->target_pid) {
2587 ctx->target_pid = t->tgid;
2588 ctx->target_auid = audit_get_loginuid(t);
2589 ctx->target_uid = t_uid;
2590 ctx->target_sessionid = audit_get_sessionid(t);
2591 security_task_getsecid(t, &ctx->target_sid);
2592 memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN);
2596 axp = (void *)ctx->aux_pids;
2597 if (!axp || axp->pid_count == AUDIT_AUX_PIDS) {
2598 axp = kzalloc(sizeof(*axp), GFP_ATOMIC);
2602 axp->d.type = AUDIT_OBJ_PID;
2603 axp->d.next = ctx->aux_pids;
2604 ctx->aux_pids = (void *)axp;
2606 BUG_ON(axp->pid_count >= AUDIT_AUX_PIDS);
2608 axp->target_pid[axp->pid_count] = t->tgid;
2609 axp->target_auid[axp->pid_count] = audit_get_loginuid(t);
2610 axp->target_uid[axp->pid_count] = t_uid;
2611 axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t);
2612 security_task_getsecid(t, &axp->target_sid[axp->pid_count]);
2613 memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN);
2620 * __audit_log_bprm_fcaps - store information about a loading bprm and relevant fcaps
2621 * @bprm: pointer to the bprm being processed
2622 * @new: the proposed new credentials
2623 * @old: the old credentials
2625 * Simply check if the proc already has the caps given by the file and if not
2626 * store the priv escalation info for later auditing at the end of the syscall
2630 int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
2631 const struct cred *new, const struct cred *old)
2633 struct audit_aux_data_bprm_fcaps *ax;
2634 struct audit_context *context = current->audit_context;
2635 struct cpu_vfs_cap_data vcaps;
2636 struct dentry *dentry;
2638 ax = kmalloc(sizeof(*ax), GFP_KERNEL);
2642 ax->d.type = AUDIT_BPRM_FCAPS;
2643 ax->d.next = context->aux;
2644 context->aux = (void *)ax;
2646 dentry = dget(bprm->file->f_dentry);
2647 get_vfs_caps_from_disk(dentry, &vcaps);
2650 ax->fcap.permitted = vcaps.permitted;
2651 ax->fcap.inheritable = vcaps.inheritable;
2652 ax->fcap.fE = !!(vcaps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
2653 ax->fcap_ver = (vcaps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
2655 ax->old_pcap.permitted = old->cap_permitted;
2656 ax->old_pcap.inheritable = old->cap_inheritable;
2657 ax->old_pcap.effective = old->cap_effective;
2659 ax->new_pcap.permitted = new->cap_permitted;
2660 ax->new_pcap.inheritable = new->cap_inheritable;
2661 ax->new_pcap.effective = new->cap_effective;
2666 * __audit_log_capset - store information about the arguments to the capset syscall
2667 * @pid: target pid of the capset call
2668 * @new: the new credentials
2669 * @old: the old (current) credentials
2671 * Record the aguments userspace sent to sys_capset for later printing by the
2672 * audit system if applicable
2674 void __audit_log_capset(pid_t pid,
2675 const struct cred *new, const struct cred *old)
2677 struct audit_context *context = current->audit_context;
2678 context->capset.pid = pid;
2679 context->capset.cap.effective = new->cap_effective;
2680 context->capset.cap.inheritable = new->cap_effective;
2681 context->capset.cap.permitted = new->cap_permitted;
2682 context->type = AUDIT_CAPSET;
2685 void __audit_mmap_fd(int fd, int flags)
2687 struct audit_context *context = current->audit_context;
2688 context->mmap.fd = fd;
2689 context->mmap.flags = flags;
2690 context->type = AUDIT_MMAP;
2693 static void audit_log_task(struct audit_buffer *ab)
2697 unsigned int sessionid;
2699 auid = audit_get_loginuid(current);
2700 sessionid = audit_get_sessionid(current);
2701 current_uid_gid(&uid, &gid);
2703 audit_log_format(ab, "auid=%u uid=%u gid=%u ses=%u",
2704 from_kuid(&init_user_ns, auid),
2705 from_kuid(&init_user_ns, uid),
2706 from_kgid(&init_user_ns, gid),
2708 audit_log_task_context(ab);
2709 audit_log_format(ab, " pid=%d comm=", current->pid);
2710 audit_log_untrustedstring(ab, current->comm);
2713 static void audit_log_abend(struct audit_buffer *ab, char *reason, long signr)
2716 audit_log_format(ab, " reason=");
2717 audit_log_string(ab, reason);
2718 audit_log_format(ab, " sig=%ld", signr);
2721 * audit_core_dumps - record information about processes that end abnormally
2722 * @signr: signal value
2724 * If a process ends with a core dump, something fishy is going on and we
2725 * should record the event for investigation.
2727 void audit_core_dumps(long signr)
2729 struct audit_buffer *ab;
2734 if (signr == SIGQUIT) /* don't care for those */
2737 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
2740 audit_log_abend(ab, "memory violation", signr);
2744 void __audit_seccomp(unsigned long syscall, long signr, int code)
2746 struct audit_buffer *ab;
2748 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_SECCOMP);
2752 audit_log_format(ab, " sig=%ld", signr);
2753 audit_log_format(ab, " syscall=%ld", syscall);
2754 audit_log_format(ab, " compat=%d", is_compat_task());
2755 audit_log_format(ab, " ip=0x%lx", KSTK_EIP(current));
2756 audit_log_format(ab, " code=0x%x", code);
2760 struct list_head *audit_killed_trees(void)
2762 struct audit_context *ctx = current->audit_context;
2763 if (likely(!ctx || !ctx->in_syscall))
2765 return &ctx->killed_trees;