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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
47 #include <linux/init.h>
48 #include <asm/types.h>
49 #include <linux/atomic.h>
51 #include <linux/namei.h>
53 #include <linux/export.h>
54 #include <linux/slab.h>
55 #include <linux/mount.h>
56 #include <linux/socket.h>
57 #include <linux/mqueue.h>
58 #include <linux/audit.h>
59 #include <linux/personality.h>
60 #include <linux/time.h>
61 #include <linux/netlink.h>
62 #include <linux/compiler.h>
63 #include <asm/unistd.h>
64 #include <linux/security.h>
65 #include <linux/list.h>
66 #include <linux/binfmts.h>
67 #include <linux/highmem.h>
68 #include <linux/syscalls.h>
69 #include <asm/syscall.h>
70 #include <linux/capability.h>
71 #include <linux/fs_struct.h>
72 #include <linux/compat.h>
73 #include <linux/ctype.h>
74 #include <linux/string.h>
75 #include <linux/uaccess.h>
76 #include <linux/fsnotify_backend.h>
77 #include <uapi/linux/limits.h>
78 #include <uapi/linux/netfilter/nf_tables.h>
82 /* flags stating the success for a syscall */
83 #define AUDITSC_INVALID 0
84 #define AUDITSC_SUCCESS 1
85 #define AUDITSC_FAILURE 2
87 /* no execve audit message should be longer than this (userspace limits),
88 * see the note near the top of audit_log_execve_info() about this value */
89 #define MAX_EXECVE_AUDIT_LEN 7500
91 /* max length to print of cmdline/proctitle value during audit */
92 #define MAX_PROCTITLE_AUDIT_LEN 128
94 /* number of audit rules */
97 /* determines whether we collect data for signals sent */
100 struct audit_aux_data {
101 struct audit_aux_data *next;
105 /* Number of target pids per aux struct. */
106 #define AUDIT_AUX_PIDS 16
108 struct audit_aux_data_pids {
109 struct audit_aux_data d;
110 pid_t target_pid[AUDIT_AUX_PIDS];
111 kuid_t target_auid[AUDIT_AUX_PIDS];
112 kuid_t target_uid[AUDIT_AUX_PIDS];
113 unsigned int target_sessionid[AUDIT_AUX_PIDS];
114 u32 target_sid[AUDIT_AUX_PIDS];
115 char target_comm[AUDIT_AUX_PIDS][TASK_COMM_LEN];
119 struct audit_aux_data_bprm_fcaps {
120 struct audit_aux_data d;
121 struct audit_cap_data fcap;
122 unsigned int fcap_ver;
123 struct audit_cap_data old_pcap;
124 struct audit_cap_data new_pcap;
127 struct audit_tree_refs {
128 struct audit_tree_refs *next;
129 struct audit_chunk *c[31];
132 struct audit_nfcfgop_tab {
133 enum audit_nfcfgop op;
137 static const struct audit_nfcfgop_tab audit_nfcfgs[] = {
138 { AUDIT_XT_OP_REGISTER, "xt_register" },
139 { AUDIT_XT_OP_REPLACE, "xt_replace" },
140 { AUDIT_XT_OP_UNREGISTER, "xt_unregister" },
141 { AUDIT_NFT_OP_TABLE_REGISTER, "nft_register_table" },
142 { AUDIT_NFT_OP_TABLE_UNREGISTER, "nft_unregister_table" },
143 { AUDIT_NFT_OP_CHAIN_REGISTER, "nft_register_chain" },
144 { AUDIT_NFT_OP_CHAIN_UNREGISTER, "nft_unregister_chain" },
145 { AUDIT_NFT_OP_RULE_REGISTER, "nft_register_rule" },
146 { AUDIT_NFT_OP_RULE_UNREGISTER, "nft_unregister_rule" },
147 { AUDIT_NFT_OP_SET_REGISTER, "nft_register_set" },
148 { AUDIT_NFT_OP_SET_UNREGISTER, "nft_unregister_set" },
149 { AUDIT_NFT_OP_SETELEM_REGISTER, "nft_register_setelem" },
150 { AUDIT_NFT_OP_SETELEM_UNREGISTER, "nft_unregister_setelem" },
151 { AUDIT_NFT_OP_GEN_REGISTER, "nft_register_gen" },
152 { AUDIT_NFT_OP_OBJ_REGISTER, "nft_register_obj" },
153 { AUDIT_NFT_OP_OBJ_UNREGISTER, "nft_unregister_obj" },
154 { AUDIT_NFT_OP_OBJ_RESET, "nft_reset_obj" },
155 { AUDIT_NFT_OP_FLOWTABLE_REGISTER, "nft_register_flowtable" },
156 { AUDIT_NFT_OP_FLOWTABLE_UNREGISTER, "nft_unregister_flowtable" },
157 { AUDIT_NFT_OP_INVALID, "nft_invalid" },
160 static int audit_match_perm(struct audit_context *ctx, int mask)
167 switch (audit_classify_syscall(ctx->arch, n)) {
169 if ((mask & AUDIT_PERM_WRITE) &&
170 audit_match_class(AUDIT_CLASS_WRITE, n))
172 if ((mask & AUDIT_PERM_READ) &&
173 audit_match_class(AUDIT_CLASS_READ, n))
175 if ((mask & AUDIT_PERM_ATTR) &&
176 audit_match_class(AUDIT_CLASS_CHATTR, n))
179 case 1: /* 32bit on biarch */
180 if ((mask & AUDIT_PERM_WRITE) &&
181 audit_match_class(AUDIT_CLASS_WRITE_32, n))
183 if ((mask & AUDIT_PERM_READ) &&
184 audit_match_class(AUDIT_CLASS_READ_32, n))
186 if ((mask & AUDIT_PERM_ATTR) &&
187 audit_match_class(AUDIT_CLASS_CHATTR_32, n))
191 return mask & ACC_MODE(ctx->argv[1]);
193 return mask & ACC_MODE(ctx->argv[2]);
194 case 4: /* socketcall */
195 return ((mask & AUDIT_PERM_WRITE) && ctx->argv[0] == SYS_BIND);
197 return mask & AUDIT_PERM_EXEC;
203 static int audit_match_filetype(struct audit_context *ctx, int val)
205 struct audit_names *n;
206 umode_t mode = (umode_t)val;
211 list_for_each_entry(n, &ctx->names_list, list) {
212 if ((n->ino != AUDIT_INO_UNSET) &&
213 ((n->mode & S_IFMT) == mode))
221 * We keep a linked list of fixed-sized (31 pointer) arrays of audit_chunk *;
222 * ->first_trees points to its beginning, ->trees - to the current end of data.
223 * ->tree_count is the number of free entries in array pointed to by ->trees.
224 * Original condition is (NULL, NULL, 0); as soon as it grows we never revert to NULL,
225 * "empty" becomes (p, p, 31) afterwards. We don't shrink the list (and seriously,
226 * it's going to remain 1-element for almost any setup) until we free context itself.
227 * References in it _are_ dropped - at the same time we free/drop aux stuff.
230 static void audit_set_auditable(struct audit_context *ctx)
234 ctx->current_state = AUDIT_RECORD_CONTEXT;
238 static int put_tree_ref(struct audit_context *ctx, struct audit_chunk *chunk)
240 struct audit_tree_refs *p = ctx->trees;
241 int left = ctx->tree_count;
243 p->c[--left] = chunk;
244 ctx->tree_count = left;
253 ctx->tree_count = 30;
259 static int grow_tree_refs(struct audit_context *ctx)
261 struct audit_tree_refs *p = ctx->trees;
262 ctx->trees = kzalloc(sizeof(struct audit_tree_refs), GFP_KERNEL);
268 p->next = ctx->trees;
270 ctx->first_trees = ctx->trees;
271 ctx->tree_count = 31;
275 static void unroll_tree_refs(struct audit_context *ctx,
276 struct audit_tree_refs *p, int count)
278 struct audit_tree_refs *q;
281 /* we started with empty chain */
282 p = ctx->first_trees;
284 /* if the very first allocation has failed, nothing to do */
289 for (q = p; q != ctx->trees; q = q->next, n = 31) {
291 audit_put_chunk(q->c[n]);
295 while (n-- > ctx->tree_count) {
296 audit_put_chunk(q->c[n]);
300 ctx->tree_count = count;
303 static void free_tree_refs(struct audit_context *ctx)
305 struct audit_tree_refs *p, *q;
306 for (p = ctx->first_trees; p; p = q) {
312 static int match_tree_refs(struct audit_context *ctx, struct audit_tree *tree)
314 struct audit_tree_refs *p;
319 for (p = ctx->first_trees; p != ctx->trees; p = p->next) {
320 for (n = 0; n < 31; n++)
321 if (audit_tree_match(p->c[n], tree))
326 for (n = ctx->tree_count; n < 31; n++)
327 if (audit_tree_match(p->c[n], tree))
333 static int audit_compare_uid(kuid_t uid,
334 struct audit_names *name,
335 struct audit_field *f,
336 struct audit_context *ctx)
338 struct audit_names *n;
342 rc = audit_uid_comparator(uid, f->op, name->uid);
348 list_for_each_entry(n, &ctx->names_list, list) {
349 rc = audit_uid_comparator(uid, f->op, n->uid);
357 static int audit_compare_gid(kgid_t gid,
358 struct audit_names *name,
359 struct audit_field *f,
360 struct audit_context *ctx)
362 struct audit_names *n;
366 rc = audit_gid_comparator(gid, f->op, name->gid);
372 list_for_each_entry(n, &ctx->names_list, list) {
373 rc = audit_gid_comparator(gid, f->op, n->gid);
381 static int audit_field_compare(struct task_struct *tsk,
382 const struct cred *cred,
383 struct audit_field *f,
384 struct audit_context *ctx,
385 struct audit_names *name)
388 /* process to file object comparisons */
389 case AUDIT_COMPARE_UID_TO_OBJ_UID:
390 return audit_compare_uid(cred->uid, name, f, ctx);
391 case AUDIT_COMPARE_GID_TO_OBJ_GID:
392 return audit_compare_gid(cred->gid, name, f, ctx);
393 case AUDIT_COMPARE_EUID_TO_OBJ_UID:
394 return audit_compare_uid(cred->euid, name, f, ctx);
395 case AUDIT_COMPARE_EGID_TO_OBJ_GID:
396 return audit_compare_gid(cred->egid, name, f, ctx);
397 case AUDIT_COMPARE_AUID_TO_OBJ_UID:
398 return audit_compare_uid(audit_get_loginuid(tsk), name, f, ctx);
399 case AUDIT_COMPARE_SUID_TO_OBJ_UID:
400 return audit_compare_uid(cred->suid, name, f, ctx);
401 case AUDIT_COMPARE_SGID_TO_OBJ_GID:
402 return audit_compare_gid(cred->sgid, name, f, ctx);
403 case AUDIT_COMPARE_FSUID_TO_OBJ_UID:
404 return audit_compare_uid(cred->fsuid, name, f, ctx);
405 case AUDIT_COMPARE_FSGID_TO_OBJ_GID:
406 return audit_compare_gid(cred->fsgid, name, f, ctx);
407 /* uid comparisons */
408 case AUDIT_COMPARE_UID_TO_AUID:
409 return audit_uid_comparator(cred->uid, f->op,
410 audit_get_loginuid(tsk));
411 case AUDIT_COMPARE_UID_TO_EUID:
412 return audit_uid_comparator(cred->uid, f->op, cred->euid);
413 case AUDIT_COMPARE_UID_TO_SUID:
414 return audit_uid_comparator(cred->uid, f->op, cred->suid);
415 case AUDIT_COMPARE_UID_TO_FSUID:
416 return audit_uid_comparator(cred->uid, f->op, cred->fsuid);
417 /* auid comparisons */
418 case AUDIT_COMPARE_AUID_TO_EUID:
419 return audit_uid_comparator(audit_get_loginuid(tsk), f->op,
421 case AUDIT_COMPARE_AUID_TO_SUID:
422 return audit_uid_comparator(audit_get_loginuid(tsk), f->op,
424 case AUDIT_COMPARE_AUID_TO_FSUID:
425 return audit_uid_comparator(audit_get_loginuid(tsk), f->op,
427 /* euid comparisons */
428 case AUDIT_COMPARE_EUID_TO_SUID:
429 return audit_uid_comparator(cred->euid, f->op, cred->suid);
430 case AUDIT_COMPARE_EUID_TO_FSUID:
431 return audit_uid_comparator(cred->euid, f->op, cred->fsuid);
432 /* suid comparisons */
433 case AUDIT_COMPARE_SUID_TO_FSUID:
434 return audit_uid_comparator(cred->suid, f->op, cred->fsuid);
435 /* gid comparisons */
436 case AUDIT_COMPARE_GID_TO_EGID:
437 return audit_gid_comparator(cred->gid, f->op, cred->egid);
438 case AUDIT_COMPARE_GID_TO_SGID:
439 return audit_gid_comparator(cred->gid, f->op, cred->sgid);
440 case AUDIT_COMPARE_GID_TO_FSGID:
441 return audit_gid_comparator(cred->gid, f->op, cred->fsgid);
442 /* egid comparisons */
443 case AUDIT_COMPARE_EGID_TO_SGID:
444 return audit_gid_comparator(cred->egid, f->op, cred->sgid);
445 case AUDIT_COMPARE_EGID_TO_FSGID:
446 return audit_gid_comparator(cred->egid, f->op, cred->fsgid);
447 /* sgid comparison */
448 case AUDIT_COMPARE_SGID_TO_FSGID:
449 return audit_gid_comparator(cred->sgid, f->op, cred->fsgid);
451 WARN(1, "Missing AUDIT_COMPARE define. Report as a bug\n");
457 /* Determine if any context name data matches a rule's watch data */
458 /* Compare a task_struct with an audit_rule. Return 1 on match, 0
461 * If task_creation is true, this is an explicit indication that we are
462 * filtering a task rule at task creation time. This and tsk == current are
463 * the only situations where tsk->cred may be accessed without an rcu read lock.
465 static int audit_filter_rules(struct task_struct *tsk,
466 struct audit_krule *rule,
467 struct audit_context *ctx,
468 struct audit_names *name,
469 enum audit_state *state,
472 const struct cred *cred;
475 unsigned int sessionid;
477 cred = rcu_dereference_check(tsk->cred, tsk == current || task_creation);
479 for (i = 0; i < rule->field_count; i++) {
480 struct audit_field *f = &rule->fields[i];
481 struct audit_names *n;
487 pid = task_tgid_nr(tsk);
488 result = audit_comparator(pid, f->op, f->val);
493 ctx->ppid = task_ppid_nr(tsk);
494 result = audit_comparator(ctx->ppid, f->op, f->val);
498 result = audit_exe_compare(tsk, rule->exe);
499 if (f->op == Audit_not_equal)
503 result = audit_uid_comparator(cred->uid, f->op, f->uid);
506 result = audit_uid_comparator(cred->euid, f->op, f->uid);
509 result = audit_uid_comparator(cred->suid, f->op, f->uid);
512 result = audit_uid_comparator(cred->fsuid, f->op, f->uid);
515 result = audit_gid_comparator(cred->gid, f->op, f->gid);
516 if (f->op == Audit_equal) {
518 result = groups_search(cred->group_info, f->gid);
519 } else if (f->op == Audit_not_equal) {
521 result = !groups_search(cred->group_info, f->gid);
525 result = audit_gid_comparator(cred->egid, f->op, f->gid);
526 if (f->op == Audit_equal) {
528 result = groups_search(cred->group_info, f->gid);
529 } else if (f->op == Audit_not_equal) {
531 result = !groups_search(cred->group_info, f->gid);
535 result = audit_gid_comparator(cred->sgid, f->op, f->gid);
538 result = audit_gid_comparator(cred->fsgid, f->op, f->gid);
540 case AUDIT_SESSIONID:
541 sessionid = audit_get_sessionid(tsk);
542 result = audit_comparator(sessionid, f->op, f->val);
545 result = audit_comparator(tsk->personality, f->op, f->val);
549 result = audit_comparator(ctx->arch, f->op, f->val);
553 if (ctx && ctx->return_valid != AUDITSC_INVALID)
554 result = audit_comparator(ctx->return_code, f->op, f->val);
557 if (ctx && ctx->return_valid != AUDITSC_INVALID) {
559 result = audit_comparator(ctx->return_valid, f->op, AUDITSC_SUCCESS);
561 result = audit_comparator(ctx->return_valid, f->op, AUDITSC_FAILURE);
566 if (audit_comparator(MAJOR(name->dev), f->op, f->val) ||
567 audit_comparator(MAJOR(name->rdev), f->op, f->val))
570 list_for_each_entry(n, &ctx->names_list, list) {
571 if (audit_comparator(MAJOR(n->dev), f->op, f->val) ||
572 audit_comparator(MAJOR(n->rdev), f->op, f->val)) {
581 if (audit_comparator(MINOR(name->dev), f->op, f->val) ||
582 audit_comparator(MINOR(name->rdev), f->op, f->val))
585 list_for_each_entry(n, &ctx->names_list, list) {
586 if (audit_comparator(MINOR(n->dev), f->op, f->val) ||
587 audit_comparator(MINOR(n->rdev), f->op, f->val)) {
596 result = audit_comparator(name->ino, f->op, f->val);
598 list_for_each_entry(n, &ctx->names_list, list) {
599 if (audit_comparator(n->ino, f->op, f->val)) {
608 result = audit_uid_comparator(name->uid, f->op, f->uid);
610 list_for_each_entry(n, &ctx->names_list, list) {
611 if (audit_uid_comparator(n->uid, f->op, f->uid)) {
620 result = audit_gid_comparator(name->gid, f->op, f->gid);
622 list_for_each_entry(n, &ctx->names_list, list) {
623 if (audit_gid_comparator(n->gid, f->op, f->gid)) {
632 result = audit_watch_compare(rule->watch,
635 if (f->op == Audit_not_equal)
641 result = match_tree_refs(ctx, rule->tree);
642 if (f->op == Audit_not_equal)
647 result = audit_uid_comparator(audit_get_loginuid(tsk),
650 case AUDIT_LOGINUID_SET:
651 result = audit_comparator(audit_loginuid_set(tsk), f->op, f->val);
653 case AUDIT_SADDR_FAM:
655 result = audit_comparator(ctx->sockaddr->ss_family,
658 case AUDIT_SUBJ_USER:
659 case AUDIT_SUBJ_ROLE:
660 case AUDIT_SUBJ_TYPE:
663 /* NOTE: this may return negative values indicating
664 a temporary error. We simply treat this as a
665 match for now to avoid losing information that
666 may be wanted. An error message will also be
670 security_task_getsecid(tsk, &sid);
673 result = security_audit_rule_match(sid, f->type,
681 case AUDIT_OBJ_LEV_LOW:
682 case AUDIT_OBJ_LEV_HIGH:
683 /* The above note for AUDIT_SUBJ_USER...AUDIT_SUBJ_CLR
686 /* Find files that match */
688 result = security_audit_rule_match(
694 list_for_each_entry(n, &ctx->names_list, list) {
695 if (security_audit_rule_match(
705 /* Find ipc objects that match */
706 if (!ctx || ctx->type != AUDIT_IPC)
708 if (security_audit_rule_match(ctx->ipc.osid,
719 result = audit_comparator(ctx->argv[f->type-AUDIT_ARG0], f->op, f->val);
721 case AUDIT_FILTERKEY:
722 /* ignore this field for filtering */
726 result = audit_match_perm(ctx, f->val);
727 if (f->op == Audit_not_equal)
731 result = audit_match_filetype(ctx, f->val);
732 if (f->op == Audit_not_equal)
735 case AUDIT_FIELD_COMPARE:
736 result = audit_field_compare(tsk, cred, f, ctx, name);
744 if (rule->prio <= ctx->prio)
746 if (rule->filterkey) {
747 kfree(ctx->filterkey);
748 ctx->filterkey = kstrdup(rule->filterkey, GFP_ATOMIC);
750 ctx->prio = rule->prio;
752 switch (rule->action) {
754 *state = AUDIT_DISABLED;
757 *state = AUDIT_RECORD_CONTEXT;
763 /* At process creation time, we can determine if system-call auditing is
764 * completely disabled for this task. Since we only have the task
765 * structure at this point, we can only check uid and gid.
767 static enum audit_state audit_filter_task(struct task_struct *tsk, char **key)
769 struct audit_entry *e;
770 enum audit_state state;
773 list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_TASK], list) {
774 if (audit_filter_rules(tsk, &e->rule, NULL, NULL,
776 if (state == AUDIT_RECORD_CONTEXT)
777 *key = kstrdup(e->rule.filterkey, GFP_ATOMIC);
783 return AUDIT_BUILD_CONTEXT;
786 static int audit_in_mask(const struct audit_krule *rule, unsigned long val)
790 if (val > 0xffffffff)
793 word = AUDIT_WORD(val);
794 if (word >= AUDIT_BITMASK_SIZE)
797 bit = AUDIT_BIT(val);
799 return rule->mask[word] & bit;
802 /* At syscall exit time, this filter is called if the audit_state is
803 * not low enough that auditing cannot take place, but is also not
804 * high enough that we already know we have to write an audit record
805 * (i.e., the state is AUDIT_SETUP_CONTEXT or AUDIT_BUILD_CONTEXT).
807 static void audit_filter_syscall(struct task_struct *tsk,
808 struct audit_context *ctx,
809 struct list_head *list)
811 struct audit_entry *e;
812 enum audit_state state;
814 if (auditd_test_task(tsk))
818 list_for_each_entry_rcu(e, list, list) {
819 if (audit_in_mask(&e->rule, ctx->major) &&
820 audit_filter_rules(tsk, &e->rule, ctx, NULL,
823 ctx->current_state = state;
832 * Given an audit_name check the inode hash table to see if they match.
833 * Called holding the rcu read lock to protect the use of audit_inode_hash
835 static int audit_filter_inode_name(struct task_struct *tsk,
836 struct audit_names *n,
837 struct audit_context *ctx) {
838 int h = audit_hash_ino((u32)n->ino);
839 struct list_head *list = &audit_inode_hash[h];
840 struct audit_entry *e;
841 enum audit_state state;
843 list_for_each_entry_rcu(e, list, list) {
844 if (audit_in_mask(&e->rule, ctx->major) &&
845 audit_filter_rules(tsk, &e->rule, ctx, n, &state, false)) {
846 ctx->current_state = state;
853 /* At syscall exit time, this filter is called if any audit_names have been
854 * collected during syscall processing. We only check rules in sublists at hash
855 * buckets applicable to the inode numbers in audit_names.
856 * Regarding audit_state, same rules apply as for audit_filter_syscall().
858 void audit_filter_inodes(struct task_struct *tsk, struct audit_context *ctx)
860 struct audit_names *n;
862 if (auditd_test_task(tsk))
867 list_for_each_entry(n, &ctx->names_list, list) {
868 if (audit_filter_inode_name(tsk, n, ctx))
874 static inline void audit_proctitle_free(struct audit_context *context)
876 kfree(context->proctitle.value);
877 context->proctitle.value = NULL;
878 context->proctitle.len = 0;
881 static inline void audit_free_module(struct audit_context *context)
883 if (context->type == AUDIT_KERN_MODULE) {
884 kfree(context->module.name);
885 context->module.name = NULL;
888 static inline void audit_free_names(struct audit_context *context)
890 struct audit_names *n, *next;
892 list_for_each_entry_safe(n, next, &context->names_list, list) {
899 context->name_count = 0;
900 path_put(&context->pwd);
901 context->pwd.dentry = NULL;
902 context->pwd.mnt = NULL;
905 static inline void audit_free_aux(struct audit_context *context)
907 struct audit_aux_data *aux;
909 while ((aux = context->aux)) {
910 context->aux = aux->next;
913 while ((aux = context->aux_pids)) {
914 context->aux_pids = aux->next;
919 static inline struct audit_context *audit_alloc_context(enum audit_state state)
921 struct audit_context *context;
923 context = kzalloc(sizeof(*context), GFP_KERNEL);
926 context->state = state;
927 context->prio = state == AUDIT_RECORD_CONTEXT ? ~0ULL : 0;
928 INIT_LIST_HEAD(&context->killed_trees);
929 INIT_LIST_HEAD(&context->names_list);
930 context->fds[0] = -1;
931 context->return_valid = AUDITSC_INVALID;
936 * audit_alloc - allocate an audit context block for a task
939 * Filter on the task information and allocate a per-task audit context
940 * if necessary. Doing so turns on system call auditing for the
941 * specified task. This is called from copy_process, so no lock is
944 int audit_alloc(struct task_struct *tsk)
946 struct audit_context *context;
947 enum audit_state state;
950 if (likely(!audit_ever_enabled))
951 return 0; /* Return if not auditing. */
953 state = audit_filter_task(tsk, &key);
954 if (state == AUDIT_DISABLED) {
955 clear_task_syscall_work(tsk, SYSCALL_AUDIT);
959 if (!(context = audit_alloc_context(state))) {
961 audit_log_lost("out of memory in audit_alloc");
964 context->filterkey = key;
966 audit_set_context(tsk, context);
967 set_task_syscall_work(tsk, SYSCALL_AUDIT);
971 static inline void audit_free_context(struct audit_context *context)
973 audit_free_module(context);
974 audit_free_names(context);
975 unroll_tree_refs(context, NULL, 0);
976 free_tree_refs(context);
977 audit_free_aux(context);
978 kfree(context->filterkey);
979 kfree(context->sockaddr);
980 audit_proctitle_free(context);
984 static int audit_log_pid_context(struct audit_context *context, pid_t pid,
985 kuid_t auid, kuid_t uid, unsigned int sessionid,
988 struct audit_buffer *ab;
993 ab = audit_log_start(context, GFP_KERNEL, AUDIT_OBJ_PID);
997 audit_log_format(ab, "opid=%d oauid=%d ouid=%d oses=%d", pid,
998 from_kuid(&init_user_ns, auid),
999 from_kuid(&init_user_ns, uid), sessionid);
1001 if (security_secid_to_secctx(sid, &ctx, &len)) {
1002 audit_log_format(ab, " obj=(none)");
1005 audit_log_format(ab, " obj=%s", ctx);
1006 security_release_secctx(ctx, len);
1009 audit_log_format(ab, " ocomm=");
1010 audit_log_untrustedstring(ab, comm);
1016 static void audit_log_execve_info(struct audit_context *context,
1017 struct audit_buffer **ab)
1031 const char __user *p = (const char __user *)current->mm->arg_start;
1033 /* NOTE: this buffer needs to be large enough to hold all the non-arg
1034 * data we put in the audit record for this argument (see the
1035 * code below) ... at this point in time 96 is plenty */
1038 /* NOTE: we set MAX_EXECVE_AUDIT_LEN to a rather arbitrary limit, the
1039 * current value of 7500 is not as important as the fact that it
1040 * is less than 8k, a setting of 7500 gives us plenty of wiggle
1041 * room if we go over a little bit in the logging below */
1042 WARN_ON_ONCE(MAX_EXECVE_AUDIT_LEN > 7500);
1043 len_max = MAX_EXECVE_AUDIT_LEN;
1045 /* scratch buffer to hold the userspace args */
1046 buf_head = kmalloc(MAX_EXECVE_AUDIT_LEN + 1, GFP_KERNEL);
1048 audit_panic("out of memory for argv string");
1053 audit_log_format(*ab, "argc=%d", context->execve.argc);
1058 require_data = true;
1063 /* NOTE: we don't ever want to trust this value for anything
1064 * serious, but the audit record format insists we
1065 * provide an argument length for really long arguments,
1066 * e.g. > MAX_EXECVE_AUDIT_LEN, so we have no choice but
1067 * to use strncpy_from_user() to obtain this value for
1068 * recording in the log, although we don't use it
1069 * anywhere here to avoid a double-fetch problem */
1071 len_full = strnlen_user(p, MAX_ARG_STRLEN) - 1;
1073 /* read more data from userspace */
1075 /* can we make more room in the buffer? */
1076 if (buf != buf_head) {
1077 memmove(buf_head, buf, len_buf);
1081 /* fetch as much as we can of the argument */
1082 len_tmp = strncpy_from_user(&buf_head[len_buf], p,
1084 if (len_tmp == -EFAULT) {
1085 /* unable to copy from userspace */
1086 send_sig(SIGKILL, current, 0);
1088 } else if (len_tmp == (len_max - len_buf)) {
1089 /* buffer is not large enough */
1090 require_data = true;
1091 /* NOTE: if we are going to span multiple
1092 * buffers force the encoding so we stand
1093 * a chance at a sane len_full value and
1094 * consistent record encoding */
1096 len_full = len_full * 2;
1099 require_data = false;
1101 encode = audit_string_contains_control(
1103 /* try to use a trusted value for len_full */
1104 if (len_full < len_max)
1105 len_full = (encode ?
1106 len_tmp * 2 : len_tmp);
1110 buf_head[len_buf] = '\0';
1112 /* length of the buffer in the audit record? */
1113 len_abuf = (encode ? len_buf * 2 : len_buf + 2);
1116 /* write as much as we can to the audit log */
1118 /* NOTE: some magic numbers here - basically if we
1119 * can't fit a reasonable amount of data into the
1120 * existing audit buffer, flush it and start with
1122 if ((sizeof(abuf) + 8) > len_rem) {
1125 *ab = audit_log_start(context,
1126 GFP_KERNEL, AUDIT_EXECVE);
1131 /* create the non-arg portion of the arg record */
1133 if (require_data || (iter > 0) ||
1134 ((len_abuf + sizeof(abuf)) > len_rem)) {
1136 len_tmp += snprintf(&abuf[len_tmp],
1137 sizeof(abuf) - len_tmp,
1141 len_tmp += snprintf(&abuf[len_tmp],
1142 sizeof(abuf) - len_tmp,
1143 " a%d[%d]=", arg, iter++);
1145 len_tmp += snprintf(&abuf[len_tmp],
1146 sizeof(abuf) - len_tmp,
1148 WARN_ON(len_tmp >= sizeof(abuf));
1149 abuf[sizeof(abuf) - 1] = '\0';
1151 /* log the arg in the audit record */
1152 audit_log_format(*ab, "%s", abuf);
1156 if (len_abuf > len_rem)
1157 len_tmp = len_rem / 2; /* encoding */
1158 audit_log_n_hex(*ab, buf, len_tmp);
1159 len_rem -= len_tmp * 2;
1160 len_abuf -= len_tmp * 2;
1162 if (len_abuf > len_rem)
1163 len_tmp = len_rem - 2; /* quotes */
1164 audit_log_n_string(*ab, buf, len_tmp);
1165 len_rem -= len_tmp + 2;
1166 /* don't subtract the "2" because we still need
1167 * to add quotes to the remaining string */
1168 len_abuf -= len_tmp;
1174 /* ready to move to the next argument? */
1175 if ((len_buf == 0) && !require_data) {
1179 require_data = true;
1182 } while (arg < context->execve.argc);
1184 /* NOTE: the caller handles the final audit_log_end() call */
1190 static void audit_log_cap(struct audit_buffer *ab, char *prefix,
1195 if (cap_isclear(*cap)) {
1196 audit_log_format(ab, " %s=0", prefix);
1199 audit_log_format(ab, " %s=", prefix);
1201 audit_log_format(ab, "%08x", cap->cap[CAP_LAST_U32 - i]);
1204 static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
1206 if (name->fcap_ver == -1) {
1207 audit_log_format(ab, " cap_fe=? cap_fver=? cap_fp=? cap_fi=?");
1210 audit_log_cap(ab, "cap_fp", &name->fcap.permitted);
1211 audit_log_cap(ab, "cap_fi", &name->fcap.inheritable);
1212 audit_log_format(ab, " cap_fe=%d cap_fver=%x cap_frootid=%d",
1213 name->fcap.fE, name->fcap_ver,
1214 from_kuid(&init_user_ns, name->fcap.rootid));
1217 static void show_special(struct audit_context *context, int *call_panic)
1219 struct audit_buffer *ab;
1222 ab = audit_log_start(context, GFP_KERNEL, context->type);
1226 switch (context->type) {
1227 case AUDIT_SOCKETCALL: {
1228 int nargs = context->socketcall.nargs;
1229 audit_log_format(ab, "nargs=%d", nargs);
1230 for (i = 0; i < nargs; i++)
1231 audit_log_format(ab, " a%d=%lx", i,
1232 context->socketcall.args[i]);
1235 u32 osid = context->ipc.osid;
1237 audit_log_format(ab, "ouid=%u ogid=%u mode=%#ho",
1238 from_kuid(&init_user_ns, context->ipc.uid),
1239 from_kgid(&init_user_ns, context->ipc.gid),
1244 if (security_secid_to_secctx(osid, &ctx, &len)) {
1245 audit_log_format(ab, " osid=%u", osid);
1248 audit_log_format(ab, " obj=%s", ctx);
1249 security_release_secctx(ctx, len);
1252 if (context->ipc.has_perm) {
1254 ab = audit_log_start(context, GFP_KERNEL,
1255 AUDIT_IPC_SET_PERM);
1258 audit_log_format(ab,
1259 "qbytes=%lx ouid=%u ogid=%u mode=%#ho",
1260 context->ipc.qbytes,
1261 context->ipc.perm_uid,
1262 context->ipc.perm_gid,
1263 context->ipc.perm_mode);
1267 audit_log_format(ab,
1268 "oflag=0x%x mode=%#ho mq_flags=0x%lx mq_maxmsg=%ld "
1269 "mq_msgsize=%ld mq_curmsgs=%ld",
1270 context->mq_open.oflag, context->mq_open.mode,
1271 context->mq_open.attr.mq_flags,
1272 context->mq_open.attr.mq_maxmsg,
1273 context->mq_open.attr.mq_msgsize,
1274 context->mq_open.attr.mq_curmsgs);
1276 case AUDIT_MQ_SENDRECV:
1277 audit_log_format(ab,
1278 "mqdes=%d msg_len=%zd msg_prio=%u "
1279 "abs_timeout_sec=%lld abs_timeout_nsec=%ld",
1280 context->mq_sendrecv.mqdes,
1281 context->mq_sendrecv.msg_len,
1282 context->mq_sendrecv.msg_prio,
1283 (long long) context->mq_sendrecv.abs_timeout.tv_sec,
1284 context->mq_sendrecv.abs_timeout.tv_nsec);
1286 case AUDIT_MQ_NOTIFY:
1287 audit_log_format(ab, "mqdes=%d sigev_signo=%d",
1288 context->mq_notify.mqdes,
1289 context->mq_notify.sigev_signo);
1291 case AUDIT_MQ_GETSETATTR: {
1292 struct mq_attr *attr = &context->mq_getsetattr.mqstat;
1293 audit_log_format(ab,
1294 "mqdes=%d mq_flags=0x%lx mq_maxmsg=%ld mq_msgsize=%ld "
1296 context->mq_getsetattr.mqdes,
1297 attr->mq_flags, attr->mq_maxmsg,
1298 attr->mq_msgsize, attr->mq_curmsgs);
1301 audit_log_format(ab, "pid=%d", context->capset.pid);
1302 audit_log_cap(ab, "cap_pi", &context->capset.cap.inheritable);
1303 audit_log_cap(ab, "cap_pp", &context->capset.cap.permitted);
1304 audit_log_cap(ab, "cap_pe", &context->capset.cap.effective);
1305 audit_log_cap(ab, "cap_pa", &context->capset.cap.ambient);
1308 audit_log_format(ab, "fd=%d flags=0x%x", context->mmap.fd,
1309 context->mmap.flags);
1312 audit_log_execve_info(context, &ab);
1314 case AUDIT_KERN_MODULE:
1315 audit_log_format(ab, "name=");
1316 if (context->module.name) {
1317 audit_log_untrustedstring(ab, context->module.name);
1319 audit_log_format(ab, "(null)");
1326 static inline int audit_proctitle_rtrim(char *proctitle, int len)
1328 char *end = proctitle + len - 1;
1329 while (end > proctitle && !isprint(*end))
1332 /* catch the case where proctitle is only 1 non-print character */
1333 len = end - proctitle + 1;
1334 len -= isprint(proctitle[len-1]) == 0;
1339 * audit_log_name - produce AUDIT_PATH record from struct audit_names
1340 * @context: audit_context for the task
1341 * @n: audit_names structure with reportable details
1342 * @path: optional path to report instead of audit_names->name
1343 * @record_num: record number to report when handling a list of names
1344 * @call_panic: optional pointer to int that will be updated if secid fails
1346 static void audit_log_name(struct audit_context *context, struct audit_names *n,
1347 const struct path *path, int record_num, int *call_panic)
1349 struct audit_buffer *ab;
1351 ab = audit_log_start(context, GFP_KERNEL, AUDIT_PATH);
1355 audit_log_format(ab, "item=%d", record_num);
1358 audit_log_d_path(ab, " name=", path);
1360 switch (n->name_len) {
1361 case AUDIT_NAME_FULL:
1362 /* log the full path */
1363 audit_log_format(ab, " name=");
1364 audit_log_untrustedstring(ab, n->name->name);
1367 /* name was specified as a relative path and the
1368 * directory component is the cwd
1370 if (context->pwd.dentry && context->pwd.mnt)
1371 audit_log_d_path(ab, " name=", &context->pwd);
1373 audit_log_format(ab, " name=(null)");
1376 /* log the name's directory component */
1377 audit_log_format(ab, " name=");
1378 audit_log_n_untrustedstring(ab, n->name->name,
1382 audit_log_format(ab, " name=(null)");
1384 if (n->ino != AUDIT_INO_UNSET)
1385 audit_log_format(ab, " inode=%lu dev=%02x:%02x mode=%#ho ouid=%u ogid=%u rdev=%02x:%02x",
1390 from_kuid(&init_user_ns, n->uid),
1391 from_kgid(&init_user_ns, n->gid),
1398 if (security_secid_to_secctx(
1399 n->osid, &ctx, &len)) {
1400 audit_log_format(ab, " osid=%u", n->osid);
1404 audit_log_format(ab, " obj=%s", ctx);
1405 security_release_secctx(ctx, len);
1409 /* log the audit_names record type */
1411 case AUDIT_TYPE_NORMAL:
1412 audit_log_format(ab, " nametype=NORMAL");
1414 case AUDIT_TYPE_PARENT:
1415 audit_log_format(ab, " nametype=PARENT");
1417 case AUDIT_TYPE_CHILD_DELETE:
1418 audit_log_format(ab, " nametype=DELETE");
1420 case AUDIT_TYPE_CHILD_CREATE:
1421 audit_log_format(ab, " nametype=CREATE");
1424 audit_log_format(ab, " nametype=UNKNOWN");
1428 audit_log_fcaps(ab, n);
1432 static void audit_log_proctitle(void)
1436 char *msg = "(null)";
1437 int len = strlen(msg);
1438 struct audit_context *context = audit_context();
1439 struct audit_buffer *ab;
1441 ab = audit_log_start(context, GFP_KERNEL, AUDIT_PROCTITLE);
1443 return; /* audit_panic or being filtered */
1445 audit_log_format(ab, "proctitle=");
1448 if (!context->proctitle.value) {
1449 buf = kmalloc(MAX_PROCTITLE_AUDIT_LEN, GFP_KERNEL);
1452 /* Historically called this from procfs naming */
1453 res = get_cmdline(current, buf, MAX_PROCTITLE_AUDIT_LEN);
1458 res = audit_proctitle_rtrim(buf, res);
1463 context->proctitle.value = buf;
1464 context->proctitle.len = res;
1466 msg = context->proctitle.value;
1467 len = context->proctitle.len;
1469 audit_log_n_untrustedstring(ab, msg, len);
1473 static void audit_log_exit(void)
1475 int i, call_panic = 0;
1476 struct audit_context *context = audit_context();
1477 struct audit_buffer *ab;
1478 struct audit_aux_data *aux;
1479 struct audit_names *n;
1481 context->personality = current->personality;
1483 ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
1485 return; /* audit_panic has been called */
1486 audit_log_format(ab, "arch=%x syscall=%d",
1487 context->arch, context->major);
1488 if (context->personality != PER_LINUX)
1489 audit_log_format(ab, " per=%lx", context->personality);
1490 if (context->return_valid != AUDITSC_INVALID)
1491 audit_log_format(ab, " success=%s exit=%ld",
1492 (context->return_valid==AUDITSC_SUCCESS)?"yes":"no",
1493 context->return_code);
1495 audit_log_format(ab,
1496 " a0=%lx a1=%lx a2=%lx a3=%lx items=%d",
1501 context->name_count);
1503 audit_log_task_info(ab);
1504 audit_log_key(ab, context->filterkey);
1507 for (aux = context->aux; aux; aux = aux->next) {
1509 ab = audit_log_start(context, GFP_KERNEL, aux->type);
1511 continue; /* audit_panic has been called */
1513 switch (aux->type) {
1515 case AUDIT_BPRM_FCAPS: {
1516 struct audit_aux_data_bprm_fcaps *axs = (void *)aux;
1517 audit_log_format(ab, "fver=%x", axs->fcap_ver);
1518 audit_log_cap(ab, "fp", &axs->fcap.permitted);
1519 audit_log_cap(ab, "fi", &axs->fcap.inheritable);
1520 audit_log_format(ab, " fe=%d", axs->fcap.fE);
1521 audit_log_cap(ab, "old_pp", &axs->old_pcap.permitted);
1522 audit_log_cap(ab, "old_pi", &axs->old_pcap.inheritable);
1523 audit_log_cap(ab, "old_pe", &axs->old_pcap.effective);
1524 audit_log_cap(ab, "old_pa", &axs->old_pcap.ambient);
1525 audit_log_cap(ab, "pp", &axs->new_pcap.permitted);
1526 audit_log_cap(ab, "pi", &axs->new_pcap.inheritable);
1527 audit_log_cap(ab, "pe", &axs->new_pcap.effective);
1528 audit_log_cap(ab, "pa", &axs->new_pcap.ambient);
1529 audit_log_format(ab, " frootid=%d",
1530 from_kuid(&init_user_ns,
1539 show_special(context, &call_panic);
1541 if (context->fds[0] >= 0) {
1542 ab = audit_log_start(context, GFP_KERNEL, AUDIT_FD_PAIR);
1544 audit_log_format(ab, "fd0=%d fd1=%d",
1545 context->fds[0], context->fds[1]);
1550 if (context->sockaddr_len) {
1551 ab = audit_log_start(context, GFP_KERNEL, AUDIT_SOCKADDR);
1553 audit_log_format(ab, "saddr=");
1554 audit_log_n_hex(ab, (void *)context->sockaddr,
1555 context->sockaddr_len);
1560 for (aux = context->aux_pids; aux; aux = aux->next) {
1561 struct audit_aux_data_pids *axs = (void *)aux;
1563 for (i = 0; i < axs->pid_count; i++)
1564 if (audit_log_pid_context(context, axs->target_pid[i],
1565 axs->target_auid[i],
1567 axs->target_sessionid[i],
1569 axs->target_comm[i]))
1573 if (context->target_pid &&
1574 audit_log_pid_context(context, context->target_pid,
1575 context->target_auid, context->target_uid,
1576 context->target_sessionid,
1577 context->target_sid, context->target_comm))
1580 if (context->pwd.dentry && context->pwd.mnt) {
1581 ab = audit_log_start(context, GFP_KERNEL, AUDIT_CWD);
1583 audit_log_d_path(ab, "cwd=", &context->pwd);
1589 list_for_each_entry(n, &context->names_list, list) {
1592 audit_log_name(context, n, NULL, i++, &call_panic);
1595 audit_log_proctitle();
1597 /* Send end of event record to help user space know we are finished */
1598 ab = audit_log_start(context, GFP_KERNEL, AUDIT_EOE);
1602 audit_panic("error converting sid to string");
1606 * __audit_free - free a per-task audit context
1607 * @tsk: task whose audit context block to free
1609 * Called from copy_process and do_exit
1611 void __audit_free(struct task_struct *tsk)
1613 struct audit_context *context = tsk->audit_context;
1618 if (!list_empty(&context->killed_trees))
1619 audit_kill_trees(context);
1621 /* We are called either by do_exit() or the fork() error handling code;
1622 * in the former case tsk == current and in the latter tsk is a
1623 * random task_struct that doesn't doesn't have any meaningful data we
1624 * need to log via audit_log_exit().
1626 if (tsk == current && !context->dummy && context->in_syscall) {
1627 context->return_valid = AUDITSC_INVALID;
1628 context->return_code = 0;
1630 audit_filter_syscall(tsk, context,
1631 &audit_filter_list[AUDIT_FILTER_EXIT]);
1632 audit_filter_inodes(tsk, context);
1633 if (context->current_state == AUDIT_RECORD_CONTEXT)
1637 audit_set_context(tsk, NULL);
1638 audit_free_context(context);
1642 * __audit_syscall_entry - fill in an audit record at syscall entry
1643 * @major: major syscall type (function)
1644 * @a1: additional syscall register 1
1645 * @a2: additional syscall register 2
1646 * @a3: additional syscall register 3
1647 * @a4: additional syscall register 4
1649 * Fill in audit context at syscall entry. This only happens if the
1650 * audit context was created when the task was created and the state or
1651 * filters demand the audit context be built. If the state from the
1652 * per-task filter or from the per-syscall filter is AUDIT_RECORD_CONTEXT,
1653 * then the record will be written at syscall exit time (otherwise, it
1654 * will only be written if another part of the kernel requests that it
1657 void __audit_syscall_entry(int major, unsigned long a1, unsigned long a2,
1658 unsigned long a3, unsigned long a4)
1660 struct audit_context *context = audit_context();
1661 enum audit_state state;
1663 if (!audit_enabled || !context)
1666 BUG_ON(context->in_syscall || context->name_count);
1668 state = context->state;
1669 if (state == AUDIT_DISABLED)
1672 context->dummy = !audit_n_rules;
1673 if (!context->dummy && state == AUDIT_BUILD_CONTEXT) {
1675 if (auditd_test_task(current))
1679 context->arch = syscall_get_arch(current);
1680 context->major = major;
1681 context->argv[0] = a1;
1682 context->argv[1] = a2;
1683 context->argv[2] = a3;
1684 context->argv[3] = a4;
1685 context->serial = 0;
1686 context->in_syscall = 1;
1687 context->current_state = state;
1689 ktime_get_coarse_real_ts64(&context->ctime);
1693 * __audit_syscall_exit - deallocate audit context after a system call
1694 * @success: success value of the syscall
1695 * @return_code: return value of the syscall
1697 * Tear down after system call. If the audit context has been marked as
1698 * auditable (either because of the AUDIT_RECORD_CONTEXT state from
1699 * filtering, or because some other part of the kernel wrote an audit
1700 * message), then write out the syscall information. In call cases,
1701 * free the names stored from getname().
1703 void __audit_syscall_exit(int success, long return_code)
1705 struct audit_context *context;
1707 context = audit_context();
1711 if (!list_empty(&context->killed_trees))
1712 audit_kill_trees(context);
1714 if (!context->dummy && context->in_syscall) {
1716 context->return_valid = AUDITSC_SUCCESS;
1718 context->return_valid = AUDITSC_FAILURE;
1721 * we need to fix up the return code in the audit logs if the
1722 * actual return codes are later going to be fixed up by the
1723 * arch specific signal handlers
1725 * This is actually a test for:
1726 * (rc == ERESTARTSYS ) || (rc == ERESTARTNOINTR) ||
1727 * (rc == ERESTARTNOHAND) || (rc == ERESTART_RESTARTBLOCK)
1729 * but is faster than a bunch of ||
1731 if (unlikely(return_code <= -ERESTARTSYS) &&
1732 (return_code >= -ERESTART_RESTARTBLOCK) &&
1733 (return_code != -ENOIOCTLCMD))
1734 context->return_code = -EINTR;
1736 context->return_code = return_code;
1738 audit_filter_syscall(current, context,
1739 &audit_filter_list[AUDIT_FILTER_EXIT]);
1740 audit_filter_inodes(current, context);
1741 if (context->current_state == AUDIT_RECORD_CONTEXT)
1745 context->in_syscall = 0;
1746 context->prio = context->state == AUDIT_RECORD_CONTEXT ? ~0ULL : 0;
1748 audit_free_module(context);
1749 audit_free_names(context);
1750 unroll_tree_refs(context, NULL, 0);
1751 audit_free_aux(context);
1752 context->aux = NULL;
1753 context->aux_pids = NULL;
1754 context->target_pid = 0;
1755 context->target_sid = 0;
1756 context->sockaddr_len = 0;
1758 context->fds[0] = -1;
1759 if (context->state != AUDIT_RECORD_CONTEXT) {
1760 kfree(context->filterkey);
1761 context->filterkey = NULL;
1765 static inline void handle_one(const struct inode *inode)
1767 struct audit_context *context;
1768 struct audit_tree_refs *p;
1769 struct audit_chunk *chunk;
1771 if (likely(!inode->i_fsnotify_marks))
1773 context = audit_context();
1775 count = context->tree_count;
1777 chunk = audit_tree_lookup(inode);
1781 if (likely(put_tree_ref(context, chunk)))
1783 if (unlikely(!grow_tree_refs(context))) {
1784 pr_warn("out of memory, audit has lost a tree reference\n");
1785 audit_set_auditable(context);
1786 audit_put_chunk(chunk);
1787 unroll_tree_refs(context, p, count);
1790 put_tree_ref(context, chunk);
1793 static void handle_path(const struct dentry *dentry)
1795 struct audit_context *context;
1796 struct audit_tree_refs *p;
1797 const struct dentry *d, *parent;
1798 struct audit_chunk *drop;
1802 context = audit_context();
1804 count = context->tree_count;
1809 seq = read_seqbegin(&rename_lock);
1811 struct inode *inode = d_backing_inode(d);
1812 if (inode && unlikely(inode->i_fsnotify_marks)) {
1813 struct audit_chunk *chunk;
1814 chunk = audit_tree_lookup(inode);
1816 if (unlikely(!put_tree_ref(context, chunk))) {
1822 parent = d->d_parent;
1827 if (unlikely(read_seqretry(&rename_lock, seq) || drop)) { /* in this order */
1830 /* just a race with rename */
1831 unroll_tree_refs(context, p, count);
1834 audit_put_chunk(drop);
1835 if (grow_tree_refs(context)) {
1836 /* OK, got more space */
1837 unroll_tree_refs(context, p, count);
1841 pr_warn("out of memory, audit has lost a tree reference\n");
1842 unroll_tree_refs(context, p, count);
1843 audit_set_auditable(context);
1849 static struct audit_names *audit_alloc_name(struct audit_context *context,
1852 struct audit_names *aname;
1854 if (context->name_count < AUDIT_NAMES) {
1855 aname = &context->preallocated_names[context->name_count];
1856 memset(aname, 0, sizeof(*aname));
1858 aname = kzalloc(sizeof(*aname), GFP_NOFS);
1861 aname->should_free = true;
1864 aname->ino = AUDIT_INO_UNSET;
1866 list_add_tail(&aname->list, &context->names_list);
1868 context->name_count++;
1869 if (!context->pwd.dentry)
1870 get_fs_pwd(current->fs, &context->pwd);
1875 * __audit_reusename - fill out filename with info from existing entry
1876 * @uptr: userland ptr to pathname
1878 * Search the audit_names list for the current audit context. If there is an
1879 * existing entry with a matching "uptr" then return the filename
1880 * associated with that audit_name. If not, return NULL.
1883 __audit_reusename(const __user char *uptr)
1885 struct audit_context *context = audit_context();
1886 struct audit_names *n;
1888 list_for_each_entry(n, &context->names_list, list) {
1891 if (n->name->uptr == uptr) {
1900 * __audit_getname - add a name to the list
1901 * @name: name to add
1903 * Add a name to the list of audit names for this context.
1904 * Called from fs/namei.c:getname().
1906 void __audit_getname(struct filename *name)
1908 struct audit_context *context = audit_context();
1909 struct audit_names *n;
1911 if (!context->in_syscall)
1914 n = audit_alloc_name(context, AUDIT_TYPE_UNKNOWN);
1919 n->name_len = AUDIT_NAME_FULL;
1924 static inline int audit_copy_fcaps(struct audit_names *name,
1925 const struct dentry *dentry)
1927 struct cpu_vfs_cap_data caps;
1933 rc = get_vfs_caps_from_disk(&init_user_ns, dentry, &caps);
1937 name->fcap.permitted = caps.permitted;
1938 name->fcap.inheritable = caps.inheritable;
1939 name->fcap.fE = !!(caps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
1940 name->fcap.rootid = caps.rootid;
1941 name->fcap_ver = (caps.magic_etc & VFS_CAP_REVISION_MASK) >>
1942 VFS_CAP_REVISION_SHIFT;
1947 /* Copy inode data into an audit_names. */
1948 static void audit_copy_inode(struct audit_names *name,
1949 const struct dentry *dentry,
1950 struct inode *inode, unsigned int flags)
1952 name->ino = inode->i_ino;
1953 name->dev = inode->i_sb->s_dev;
1954 name->mode = inode->i_mode;
1955 name->uid = inode->i_uid;
1956 name->gid = inode->i_gid;
1957 name->rdev = inode->i_rdev;
1958 security_inode_getsecid(inode, &name->osid);
1959 if (flags & AUDIT_INODE_NOEVAL) {
1960 name->fcap_ver = -1;
1963 audit_copy_fcaps(name, dentry);
1967 * __audit_inode - store the inode and device from a lookup
1968 * @name: name being audited
1969 * @dentry: dentry being audited
1970 * @flags: attributes for this particular entry
1972 void __audit_inode(struct filename *name, const struct dentry *dentry,
1975 struct audit_context *context = audit_context();
1976 struct inode *inode = d_backing_inode(dentry);
1977 struct audit_names *n;
1978 bool parent = flags & AUDIT_INODE_PARENT;
1979 struct audit_entry *e;
1980 struct list_head *list = &audit_filter_list[AUDIT_FILTER_FS];
1983 if (!context->in_syscall)
1987 list_for_each_entry_rcu(e, list, list) {
1988 for (i = 0; i < e->rule.field_count; i++) {
1989 struct audit_field *f = &e->rule.fields[i];
1991 if (f->type == AUDIT_FSTYPE
1992 && audit_comparator(inode->i_sb->s_magic,
1994 && e->rule.action == AUDIT_NEVER) {
2006 * If we have a pointer to an audit_names entry already, then we can
2007 * just use it directly if the type is correct.
2012 if (n->type == AUDIT_TYPE_PARENT ||
2013 n->type == AUDIT_TYPE_UNKNOWN)
2016 if (n->type != AUDIT_TYPE_PARENT)
2021 list_for_each_entry_reverse(n, &context->names_list, list) {
2023 /* valid inode number, use that for the comparison */
2024 if (n->ino != inode->i_ino ||
2025 n->dev != inode->i_sb->s_dev)
2027 } else if (n->name) {
2028 /* inode number has not been set, check the name */
2029 if (strcmp(n->name->name, name->name))
2032 /* no inode and no name (?!) ... this is odd ... */
2035 /* match the correct record type */
2037 if (n->type == AUDIT_TYPE_PARENT ||
2038 n->type == AUDIT_TYPE_UNKNOWN)
2041 if (n->type != AUDIT_TYPE_PARENT)
2047 /* unable to find an entry with both a matching name and type */
2048 n = audit_alloc_name(context, AUDIT_TYPE_UNKNOWN);
2058 n->name_len = n->name ? parent_len(n->name->name) : AUDIT_NAME_FULL;
2059 n->type = AUDIT_TYPE_PARENT;
2060 if (flags & AUDIT_INODE_HIDDEN)
2063 n->name_len = AUDIT_NAME_FULL;
2064 n->type = AUDIT_TYPE_NORMAL;
2066 handle_path(dentry);
2067 audit_copy_inode(n, dentry, inode, flags & AUDIT_INODE_NOEVAL);
2070 void __audit_file(const struct file *file)
2072 __audit_inode(NULL, file->f_path.dentry, 0);
2076 * __audit_inode_child - collect inode info for created/removed objects
2077 * @parent: inode of dentry parent
2078 * @dentry: dentry being audited
2079 * @type: AUDIT_TYPE_* value that we're looking for
2081 * For syscalls that create or remove filesystem objects, audit_inode
2082 * can only collect information for the filesystem object's parent.
2083 * This call updates the audit context with the child's information.
2084 * Syscalls that create a new filesystem object must be hooked after
2085 * the object is created. Syscalls that remove a filesystem object
2086 * must be hooked prior, in order to capture the target inode during
2087 * unsuccessful attempts.
2089 void __audit_inode_child(struct inode *parent,
2090 const struct dentry *dentry,
2091 const unsigned char type)
2093 struct audit_context *context = audit_context();
2094 struct inode *inode = d_backing_inode(dentry);
2095 const struct qstr *dname = &dentry->d_name;
2096 struct audit_names *n, *found_parent = NULL, *found_child = NULL;
2097 struct audit_entry *e;
2098 struct list_head *list = &audit_filter_list[AUDIT_FILTER_FS];
2101 if (!context->in_syscall)
2105 list_for_each_entry_rcu(e, list, list) {
2106 for (i = 0; i < e->rule.field_count; i++) {
2107 struct audit_field *f = &e->rule.fields[i];
2109 if (f->type == AUDIT_FSTYPE
2110 && audit_comparator(parent->i_sb->s_magic,
2112 && e->rule.action == AUDIT_NEVER) {
2123 /* look for a parent entry first */
2124 list_for_each_entry(n, &context->names_list, list) {
2126 (n->type != AUDIT_TYPE_PARENT &&
2127 n->type != AUDIT_TYPE_UNKNOWN))
2130 if (n->ino == parent->i_ino && n->dev == parent->i_sb->s_dev &&
2131 !audit_compare_dname_path(dname,
2132 n->name->name, n->name_len)) {
2133 if (n->type == AUDIT_TYPE_UNKNOWN)
2134 n->type = AUDIT_TYPE_PARENT;
2140 /* is there a matching child entry? */
2141 list_for_each_entry(n, &context->names_list, list) {
2142 /* can only match entries that have a name */
2144 (n->type != type && n->type != AUDIT_TYPE_UNKNOWN))
2147 if (!strcmp(dname->name, n->name->name) ||
2148 !audit_compare_dname_path(dname, n->name->name,
2150 found_parent->name_len :
2152 if (n->type == AUDIT_TYPE_UNKNOWN)
2159 if (!found_parent) {
2160 /* create a new, "anonymous" parent record */
2161 n = audit_alloc_name(context, AUDIT_TYPE_PARENT);
2164 audit_copy_inode(n, NULL, parent, 0);
2168 found_child = audit_alloc_name(context, type);
2172 /* Re-use the name belonging to the slot for a matching parent
2173 * directory. All names for this context are relinquished in
2174 * audit_free_names() */
2176 found_child->name = found_parent->name;
2177 found_child->name_len = AUDIT_NAME_FULL;
2178 found_child->name->refcnt++;
2183 audit_copy_inode(found_child, dentry, inode, 0);
2185 found_child->ino = AUDIT_INO_UNSET;
2187 EXPORT_SYMBOL_GPL(__audit_inode_child);
2190 * auditsc_get_stamp - get local copies of audit_context values
2191 * @ctx: audit_context for the task
2192 * @t: timespec64 to store time recorded in the audit_context
2193 * @serial: serial value that is recorded in the audit_context
2195 * Also sets the context as auditable.
2197 int auditsc_get_stamp(struct audit_context *ctx,
2198 struct timespec64 *t, unsigned int *serial)
2200 if (!ctx->in_syscall)
2203 ctx->serial = audit_serial();
2204 t->tv_sec = ctx->ctime.tv_sec;
2205 t->tv_nsec = ctx->ctime.tv_nsec;
2206 *serial = ctx->serial;
2209 ctx->current_state = AUDIT_RECORD_CONTEXT;
2215 * __audit_mq_open - record audit data for a POSIX MQ open
2218 * @attr: queue attributes
2221 void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
2223 struct audit_context *context = audit_context();
2226 memcpy(&context->mq_open.attr, attr, sizeof(struct mq_attr));
2228 memset(&context->mq_open.attr, 0, sizeof(struct mq_attr));
2230 context->mq_open.oflag = oflag;
2231 context->mq_open.mode = mode;
2233 context->type = AUDIT_MQ_OPEN;
2237 * __audit_mq_sendrecv - record audit data for a POSIX MQ timed send/receive
2238 * @mqdes: MQ descriptor
2239 * @msg_len: Message length
2240 * @msg_prio: Message priority
2241 * @abs_timeout: Message timeout in absolute time
2244 void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio,
2245 const struct timespec64 *abs_timeout)
2247 struct audit_context *context = audit_context();
2248 struct timespec64 *p = &context->mq_sendrecv.abs_timeout;
2251 memcpy(p, abs_timeout, sizeof(*p));
2253 memset(p, 0, sizeof(*p));
2255 context->mq_sendrecv.mqdes = mqdes;
2256 context->mq_sendrecv.msg_len = msg_len;
2257 context->mq_sendrecv.msg_prio = msg_prio;
2259 context->type = AUDIT_MQ_SENDRECV;
2263 * __audit_mq_notify - record audit data for a POSIX MQ notify
2264 * @mqdes: MQ descriptor
2265 * @notification: Notification event
2269 void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
2271 struct audit_context *context = audit_context();
2274 context->mq_notify.sigev_signo = notification->sigev_signo;
2276 context->mq_notify.sigev_signo = 0;
2278 context->mq_notify.mqdes = mqdes;
2279 context->type = AUDIT_MQ_NOTIFY;
2283 * __audit_mq_getsetattr - record audit data for a POSIX MQ get/set attribute
2284 * @mqdes: MQ descriptor
2288 void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
2290 struct audit_context *context = audit_context();
2291 context->mq_getsetattr.mqdes = mqdes;
2292 context->mq_getsetattr.mqstat = *mqstat;
2293 context->type = AUDIT_MQ_GETSETATTR;
2297 * __audit_ipc_obj - record audit data for ipc object
2298 * @ipcp: ipc permissions
2301 void __audit_ipc_obj(struct kern_ipc_perm *ipcp)
2303 struct audit_context *context = audit_context();
2304 context->ipc.uid = ipcp->uid;
2305 context->ipc.gid = ipcp->gid;
2306 context->ipc.mode = ipcp->mode;
2307 context->ipc.has_perm = 0;
2308 security_ipc_getsecid(ipcp, &context->ipc.osid);
2309 context->type = AUDIT_IPC;
2313 * __audit_ipc_set_perm - record audit data for new ipc permissions
2314 * @qbytes: msgq bytes
2315 * @uid: msgq user id
2316 * @gid: msgq group id
2317 * @mode: msgq mode (permissions)
2319 * Called only after audit_ipc_obj().
2321 void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
2323 struct audit_context *context = audit_context();
2325 context->ipc.qbytes = qbytes;
2326 context->ipc.perm_uid = uid;
2327 context->ipc.perm_gid = gid;
2328 context->ipc.perm_mode = mode;
2329 context->ipc.has_perm = 1;
2332 void __audit_bprm(struct linux_binprm *bprm)
2334 struct audit_context *context = audit_context();
2336 context->type = AUDIT_EXECVE;
2337 context->execve.argc = bprm->argc;
2342 * __audit_socketcall - record audit data for sys_socketcall
2343 * @nargs: number of args, which should not be more than AUDITSC_ARGS.
2347 int __audit_socketcall(int nargs, unsigned long *args)
2349 struct audit_context *context = audit_context();
2351 if (nargs <= 0 || nargs > AUDITSC_ARGS || !args)
2353 context->type = AUDIT_SOCKETCALL;
2354 context->socketcall.nargs = nargs;
2355 memcpy(context->socketcall.args, args, nargs * sizeof(unsigned long));
2360 * __audit_fd_pair - record audit data for pipe and socketpair
2361 * @fd1: the first file descriptor
2362 * @fd2: the second file descriptor
2365 void __audit_fd_pair(int fd1, int fd2)
2367 struct audit_context *context = audit_context();
2368 context->fds[0] = fd1;
2369 context->fds[1] = fd2;
2373 * __audit_sockaddr - record audit data for sys_bind, sys_connect, sys_sendto
2374 * @len: data length in user space
2375 * @a: data address in kernel space
2377 * Returns 0 for success or NULL context or < 0 on error.
2379 int __audit_sockaddr(int len, void *a)
2381 struct audit_context *context = audit_context();
2383 if (!context->sockaddr) {
2384 void *p = kmalloc(sizeof(struct sockaddr_storage), GFP_KERNEL);
2387 context->sockaddr = p;
2390 context->sockaddr_len = len;
2391 memcpy(context->sockaddr, a, len);
2395 void __audit_ptrace(struct task_struct *t)
2397 struct audit_context *context = audit_context();
2399 context->target_pid = task_tgid_nr(t);
2400 context->target_auid = audit_get_loginuid(t);
2401 context->target_uid = task_uid(t);
2402 context->target_sessionid = audit_get_sessionid(t);
2403 security_task_getsecid(t, &context->target_sid);
2404 memcpy(context->target_comm, t->comm, TASK_COMM_LEN);
2408 * audit_signal_info_syscall - record signal info for syscalls
2409 * @t: task being signaled
2411 * If the audit subsystem is being terminated, record the task (pid)
2412 * and uid that is doing that.
2414 int audit_signal_info_syscall(struct task_struct *t)
2416 struct audit_aux_data_pids *axp;
2417 struct audit_context *ctx = audit_context();
2418 kuid_t t_uid = task_uid(t);
2420 if (!audit_signals || audit_dummy_context())
2423 /* optimize the common case by putting first signal recipient directly
2424 * in audit_context */
2425 if (!ctx->target_pid) {
2426 ctx->target_pid = task_tgid_nr(t);
2427 ctx->target_auid = audit_get_loginuid(t);
2428 ctx->target_uid = t_uid;
2429 ctx->target_sessionid = audit_get_sessionid(t);
2430 security_task_getsecid(t, &ctx->target_sid);
2431 memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN);
2435 axp = (void *)ctx->aux_pids;
2436 if (!axp || axp->pid_count == AUDIT_AUX_PIDS) {
2437 axp = kzalloc(sizeof(*axp), GFP_ATOMIC);
2441 axp->d.type = AUDIT_OBJ_PID;
2442 axp->d.next = ctx->aux_pids;
2443 ctx->aux_pids = (void *)axp;
2445 BUG_ON(axp->pid_count >= AUDIT_AUX_PIDS);
2447 axp->target_pid[axp->pid_count] = task_tgid_nr(t);
2448 axp->target_auid[axp->pid_count] = audit_get_loginuid(t);
2449 axp->target_uid[axp->pid_count] = t_uid;
2450 axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t);
2451 security_task_getsecid(t, &axp->target_sid[axp->pid_count]);
2452 memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN);
2459 * __audit_log_bprm_fcaps - store information about a loading bprm and relevant fcaps
2460 * @bprm: pointer to the bprm being processed
2461 * @new: the proposed new credentials
2462 * @old: the old credentials
2464 * Simply check if the proc already has the caps given by the file and if not
2465 * store the priv escalation info for later auditing at the end of the syscall
2469 int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
2470 const struct cred *new, const struct cred *old)
2472 struct audit_aux_data_bprm_fcaps *ax;
2473 struct audit_context *context = audit_context();
2474 struct cpu_vfs_cap_data vcaps;
2476 ax = kmalloc(sizeof(*ax), GFP_KERNEL);
2480 ax->d.type = AUDIT_BPRM_FCAPS;
2481 ax->d.next = context->aux;
2482 context->aux = (void *)ax;
2484 get_vfs_caps_from_disk(&init_user_ns,
2485 bprm->file->f_path.dentry, &vcaps);
2487 ax->fcap.permitted = vcaps.permitted;
2488 ax->fcap.inheritable = vcaps.inheritable;
2489 ax->fcap.fE = !!(vcaps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
2490 ax->fcap.rootid = vcaps.rootid;
2491 ax->fcap_ver = (vcaps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
2493 ax->old_pcap.permitted = old->cap_permitted;
2494 ax->old_pcap.inheritable = old->cap_inheritable;
2495 ax->old_pcap.effective = old->cap_effective;
2496 ax->old_pcap.ambient = old->cap_ambient;
2498 ax->new_pcap.permitted = new->cap_permitted;
2499 ax->new_pcap.inheritable = new->cap_inheritable;
2500 ax->new_pcap.effective = new->cap_effective;
2501 ax->new_pcap.ambient = new->cap_ambient;
2506 * __audit_log_capset - store information about the arguments to the capset syscall
2507 * @new: the new credentials
2508 * @old: the old (current) credentials
2510 * Record the arguments userspace sent to sys_capset for later printing by the
2511 * audit system if applicable
2513 void __audit_log_capset(const struct cred *new, const struct cred *old)
2515 struct audit_context *context = audit_context();
2516 context->capset.pid = task_tgid_nr(current);
2517 context->capset.cap.effective = new->cap_effective;
2518 context->capset.cap.inheritable = new->cap_effective;
2519 context->capset.cap.permitted = new->cap_permitted;
2520 context->capset.cap.ambient = new->cap_ambient;
2521 context->type = AUDIT_CAPSET;
2524 void __audit_mmap_fd(int fd, int flags)
2526 struct audit_context *context = audit_context();
2527 context->mmap.fd = fd;
2528 context->mmap.flags = flags;
2529 context->type = AUDIT_MMAP;
2532 void __audit_log_kern_module(char *name)
2534 struct audit_context *context = audit_context();
2536 context->module.name = kstrdup(name, GFP_KERNEL);
2537 if (!context->module.name)
2538 audit_log_lost("out of memory in __audit_log_kern_module");
2539 context->type = AUDIT_KERN_MODULE;
2542 void __audit_fanotify(unsigned int response)
2544 audit_log(audit_context(), GFP_KERNEL,
2545 AUDIT_FANOTIFY, "resp=%u", response);
2548 void __audit_tk_injoffset(struct timespec64 offset)
2550 audit_log(audit_context(), GFP_KERNEL, AUDIT_TIME_INJOFFSET,
2551 "sec=%lli nsec=%li",
2552 (long long)offset.tv_sec, offset.tv_nsec);
2555 static void audit_log_ntp_val(const struct audit_ntp_data *ad,
2556 const char *op, enum audit_ntp_type type)
2558 const struct audit_ntp_val *val = &ad->vals[type];
2560 if (val->newval == val->oldval)
2563 audit_log(audit_context(), GFP_KERNEL, AUDIT_TIME_ADJNTPVAL,
2564 "op=%s old=%lli new=%lli", op, val->oldval, val->newval);
2567 void __audit_ntp_log(const struct audit_ntp_data *ad)
2569 audit_log_ntp_val(ad, "offset", AUDIT_NTP_OFFSET);
2570 audit_log_ntp_val(ad, "freq", AUDIT_NTP_FREQ);
2571 audit_log_ntp_val(ad, "status", AUDIT_NTP_STATUS);
2572 audit_log_ntp_val(ad, "tai", AUDIT_NTP_TAI);
2573 audit_log_ntp_val(ad, "tick", AUDIT_NTP_TICK);
2574 audit_log_ntp_val(ad, "adjust", AUDIT_NTP_ADJUST);
2577 void __audit_log_nfcfg(const char *name, u8 af, unsigned int nentries,
2578 enum audit_nfcfgop op, gfp_t gfp)
2580 struct audit_buffer *ab;
2581 char comm[sizeof(current->comm)];
2583 ab = audit_log_start(audit_context(), gfp, AUDIT_NETFILTER_CFG);
2586 audit_log_format(ab, "table=%s family=%u entries=%u op=%s",
2587 name, af, nentries, audit_nfcfgs[op].s);
2589 audit_log_format(ab, " pid=%u", task_pid_nr(current));
2590 audit_log_task_context(ab); /* subj= */
2591 audit_log_format(ab, " comm=");
2592 audit_log_untrustedstring(ab, get_task_comm(comm, current));
2595 EXPORT_SYMBOL_GPL(__audit_log_nfcfg);
2597 static void audit_log_task(struct audit_buffer *ab)
2601 unsigned int sessionid;
2602 char comm[sizeof(current->comm)];
2604 auid = audit_get_loginuid(current);
2605 sessionid = audit_get_sessionid(current);
2606 current_uid_gid(&uid, &gid);
2608 audit_log_format(ab, "auid=%u uid=%u gid=%u ses=%u",
2609 from_kuid(&init_user_ns, auid),
2610 from_kuid(&init_user_ns, uid),
2611 from_kgid(&init_user_ns, gid),
2613 audit_log_task_context(ab);
2614 audit_log_format(ab, " pid=%d comm=", task_tgid_nr(current));
2615 audit_log_untrustedstring(ab, get_task_comm(comm, current));
2616 audit_log_d_path_exe(ab, current->mm);
2620 * audit_core_dumps - record information about processes that end abnormally
2621 * @signr: signal value
2623 * If a process ends with a core dump, something fishy is going on and we
2624 * should record the event for investigation.
2626 void audit_core_dumps(long signr)
2628 struct audit_buffer *ab;
2633 if (signr == SIGQUIT) /* don't care for those */
2636 ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_ANOM_ABEND);
2640 audit_log_format(ab, " sig=%ld res=1", signr);
2645 * audit_seccomp - record information about a seccomp action
2646 * @syscall: syscall number
2647 * @signr: signal value
2648 * @code: the seccomp action
2650 * Record the information associated with a seccomp action. Event filtering for
2651 * seccomp actions that are not to be logged is done in seccomp_log().
2652 * Therefore, this function forces auditing independent of the audit_enabled
2653 * and dummy context state because seccomp actions should be logged even when
2654 * audit is not in use.
2656 void audit_seccomp(unsigned long syscall, long signr, int code)
2658 struct audit_buffer *ab;
2660 ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_SECCOMP);
2664 audit_log_format(ab, " sig=%ld arch=%x syscall=%ld compat=%d ip=0x%lx code=0x%x",
2665 signr, syscall_get_arch(current), syscall,
2666 in_compat_syscall(), KSTK_EIP(current), code);
2670 void audit_seccomp_actions_logged(const char *names, const char *old_names,
2673 struct audit_buffer *ab;
2678 ab = audit_log_start(audit_context(), GFP_KERNEL,
2679 AUDIT_CONFIG_CHANGE);
2683 audit_log_format(ab,
2684 "op=seccomp-logging actions=%s old-actions=%s res=%d",
2685 names, old_names, res);
2689 struct list_head *audit_killed_trees(void)
2691 struct audit_context *ctx = audit_context();
2692 if (likely(!ctx || !ctx->in_syscall))
2694 return &ctx->killed_trees;