604 lines
18 KiB
C
604 lines
18 KiB
C
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/* audit.h -- Auditing support
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*
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* Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Written by Rickard E. (Rik) Faith <faith@redhat.com>
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*
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*/
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#ifndef _LINUX_AUDIT_H_
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#define _LINUX_AUDIT_H_
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#include <linux/sched.h>
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#include <linux/ptrace.h>
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#include <uapi/linux/audit.h>
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#define AUDIT_INO_UNSET ((unsigned long)-1)
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#define AUDIT_DEV_UNSET ((dev_t)-1)
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struct audit_sig_info {
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uid_t uid;
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pid_t pid;
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char ctx[0];
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};
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struct audit_buffer;
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struct audit_context;
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struct inode;
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struct netlink_skb_parms;
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struct path;
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struct linux_binprm;
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struct mq_attr;
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struct mqstat;
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struct audit_watch;
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struct audit_tree;
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struct sk_buff;
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struct audit_krule {
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u32 pflags;
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u32 flags;
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u32 listnr;
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u32 action;
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u32 mask[AUDIT_BITMASK_SIZE];
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u32 buflen; /* for data alloc on list rules */
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u32 field_count;
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char *filterkey; /* ties events to rules */
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struct audit_field *fields;
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struct audit_field *arch_f; /* quick access to arch field */
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struct audit_field *inode_f; /* quick access to an inode field */
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struct audit_watch *watch; /* associated watch */
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struct audit_tree *tree; /* associated watched tree */
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struct audit_fsnotify_mark *exe;
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struct list_head rlist; /* entry in audit_{watch,tree}.rules list */
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struct list_head list; /* for AUDIT_LIST* purposes only */
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u64 prio;
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};
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/* Flag to indicate legacy AUDIT_LOGINUID unset usage */
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#define AUDIT_LOGINUID_LEGACY 0x1
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struct audit_field {
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u32 type;
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union {
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u32 val;
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kuid_t uid;
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kgid_t gid;
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struct {
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char *lsm_str;
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void *lsm_rule;
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};
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};
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u32 op;
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};
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extern int is_audit_feature_set(int which);
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extern int __init audit_register_class(int class, unsigned *list);
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extern int audit_classify_syscall(int abi, unsigned syscall);
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extern int audit_classify_arch(int arch);
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/* only for compat system calls */
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extern unsigned compat_write_class[];
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extern unsigned compat_read_class[];
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extern unsigned compat_dir_class[];
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extern unsigned compat_chattr_class[];
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extern unsigned compat_signal_class[];
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extern int audit_classify_compat_syscall(int abi, unsigned syscall);
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/* audit_names->type values */
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#define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
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#define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
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#define AUDIT_TYPE_PARENT 2 /* a parent audit record */
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#define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
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#define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
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/* maximized args number that audit_socketcall can process */
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#define AUDITSC_ARGS 6
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/* bit values for ->signal->audit_tty */
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#define AUDIT_TTY_ENABLE BIT(0)
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#define AUDIT_TTY_LOG_PASSWD BIT(1)
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struct filename;
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extern void audit_log_session_info(struct audit_buffer *ab);
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#define AUDIT_OFF 0
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#define AUDIT_ON 1
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#define AUDIT_LOCKED 2
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#ifdef CONFIG_AUDIT
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/* These are defined in audit.c */
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/* Public API */
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extern __printf(4, 5)
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void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
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const char *fmt, ...);
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extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
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extern __printf(2, 3)
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void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
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extern void audit_log_end(struct audit_buffer *ab);
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extern bool audit_string_contains_control(const char *string,
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size_t len);
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extern void audit_log_n_hex(struct audit_buffer *ab,
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const unsigned char *buf,
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size_t len);
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extern void audit_log_n_string(struct audit_buffer *ab,
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const char *buf,
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size_t n);
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extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
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const char *string,
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size_t n);
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extern void audit_log_untrustedstring(struct audit_buffer *ab,
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const char *string);
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extern void audit_log_d_path(struct audit_buffer *ab,
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const char *prefix,
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const struct path *path);
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extern void audit_log_key(struct audit_buffer *ab,
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char *key);
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extern void audit_log_link_denied(const char *operation);
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extern void audit_log_lost(const char *message);
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extern int audit_log_task_context(struct audit_buffer *ab);
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extern void audit_log_task_info(struct audit_buffer *ab,
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struct task_struct *tsk);
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extern int audit_update_lsm_rules(void);
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/* Private API (for audit.c only) */
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extern int audit_rule_change(int type, int seq, void *data, size_t datasz);
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extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);
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extern u32 audit_enabled;
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#else /* CONFIG_AUDIT */
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static inline __printf(4, 5)
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void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
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const char *fmt, ...)
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{ }
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static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
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gfp_t gfp_mask, int type)
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{
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return NULL;
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}
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static inline __printf(2, 3)
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void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
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{ }
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static inline void audit_log_end(struct audit_buffer *ab)
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{ }
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static inline void audit_log_n_hex(struct audit_buffer *ab,
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const unsigned char *buf, size_t len)
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{ }
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static inline void audit_log_n_string(struct audit_buffer *ab,
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const char *buf, size_t n)
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{ }
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static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
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const char *string, size_t n)
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{ }
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static inline void audit_log_untrustedstring(struct audit_buffer *ab,
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const char *string)
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{ }
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static inline void audit_log_d_path(struct audit_buffer *ab,
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const char *prefix,
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const struct path *path)
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{ }
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static inline void audit_log_key(struct audit_buffer *ab, char *key)
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{ }
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static inline void audit_log_link_denied(const char *string)
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{ }
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static inline int audit_log_task_context(struct audit_buffer *ab)
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{
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return 0;
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}
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static inline void audit_log_task_info(struct audit_buffer *ab,
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struct task_struct *tsk)
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{ }
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#define audit_enabled AUDIT_OFF
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#endif /* CONFIG_AUDIT */
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#ifdef CONFIG_AUDIT_COMPAT_GENERIC
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#define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
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#else
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#define audit_is_compat(arch) false
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#endif
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#ifdef CONFIG_AUDITSYSCALL
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#include <asm/syscall.h> /* for syscall_get_arch() */
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/* These are defined in auditsc.c */
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/* Public API */
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extern int audit_alloc(struct task_struct *task);
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extern void __audit_free(struct task_struct *task);
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extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1,
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unsigned long a2, unsigned long a3);
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extern void __audit_syscall_exit(int ret_success, long ret_value);
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extern struct filename *__audit_reusename(const __user char *uptr);
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extern void __audit_getname(struct filename *name);
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#define AUDIT_INODE_PARENT 1 /* dentry represents the parent */
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#define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
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extern void __audit_inode(struct filename *name, const struct dentry *dentry,
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unsigned int flags);
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extern void __audit_file(const struct file *);
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extern void __audit_inode_child(struct inode *parent,
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const struct dentry *dentry,
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const unsigned char type);
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extern void audit_seccomp(unsigned long syscall, long signr, int code);
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extern void audit_seccomp_actions_logged(const char *names,
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const char *old_names, int res);
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extern void __audit_ptrace(struct task_struct *t);
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static inline void audit_set_context(struct task_struct *task, struct audit_context *ctx)
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{
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task->audit_context = ctx;
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}
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static inline struct audit_context *audit_context(void)
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{
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return current->audit_context;
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}
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static inline bool audit_dummy_context(void)
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{
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void *p = audit_context();
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return !p || *(int *)p;
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}
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static inline void audit_free(struct task_struct *task)
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{
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if (unlikely(task->audit_context))
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__audit_free(task);
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}
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static inline void audit_syscall_entry(int major, unsigned long a0,
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unsigned long a1, unsigned long a2,
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unsigned long a3)
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{
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if (unlikely(audit_context()))
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__audit_syscall_entry(major, a0, a1, a2, a3);
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}
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static inline void audit_syscall_exit(void *pt_regs)
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{
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if (unlikely(audit_context())) {
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int success = is_syscall_success(pt_regs);
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long return_code = regs_return_value(pt_regs);
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__audit_syscall_exit(success, return_code);
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}
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}
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static inline struct filename *audit_reusename(const __user char *name)
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{
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if (unlikely(!audit_dummy_context()))
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return __audit_reusename(name);
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return NULL;
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}
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static inline void audit_getname(struct filename *name)
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{
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if (unlikely(!audit_dummy_context()))
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__audit_getname(name);
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}
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static inline void audit_inode(struct filename *name,
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const struct dentry *dentry,
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unsigned int parent) {
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if (unlikely(!audit_dummy_context())) {
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unsigned int flags = 0;
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if (parent)
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flags |= AUDIT_INODE_PARENT;
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__audit_inode(name, dentry, flags);
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}
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}
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static inline void audit_file(struct file *file)
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{
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if (unlikely(!audit_dummy_context()))
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__audit_file(file);
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}
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static inline void audit_inode_parent_hidden(struct filename *name,
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const struct dentry *dentry)
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{
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if (unlikely(!audit_dummy_context()))
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__audit_inode(name, dentry,
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AUDIT_INODE_PARENT | AUDIT_INODE_HIDDEN);
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}
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static inline void audit_inode_child(struct inode *parent,
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const struct dentry *dentry,
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const unsigned char type) {
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if (unlikely(!audit_dummy_context()))
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__audit_inode_child(parent, dentry, type);
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}
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void audit_core_dumps(long signr);
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static inline void audit_ptrace(struct task_struct *t)
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{
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if (unlikely(!audit_dummy_context()))
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__audit_ptrace(t);
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}
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/* Private API (for audit.c only) */
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extern unsigned int audit_serial(void);
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extern int auditsc_get_stamp(struct audit_context *ctx,
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struct timespec64 *t, unsigned int *serial);
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extern int audit_set_loginuid(kuid_t loginuid);
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static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
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{
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return tsk->loginuid;
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}
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static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
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{
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return tsk->sessionid;
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}
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extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
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extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
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extern void __audit_bprm(struct linux_binprm *bprm);
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extern int __audit_socketcall(int nargs, unsigned long *args);
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extern int __audit_sockaddr(int len, void *addr);
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extern void __audit_fd_pair(int fd1, int fd2);
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extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
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extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec64 *abs_timeout);
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extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
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extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
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extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
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const struct cred *new,
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const struct cred *old);
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extern void __audit_log_capset(const struct cred *new, const struct cred *old);
|
||
|
|
extern void __audit_mmap_fd(int fd, int flags);
|
||
|
|
extern void __audit_log_kern_module(char *name);
|
||
|
|
extern void __audit_fanotify(unsigned int response);
|
||
|
|
|
||
|
|
static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
__audit_ipc_obj(ipcp);
|
||
|
|
}
|
||
|
|
static inline void audit_fd_pair(int fd1, int fd2)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
__audit_fd_pair(fd1, fd2);
|
||
|
|
}
|
||
|
|
static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
__audit_ipc_set_perm(qbytes, uid, gid, mode);
|
||
|
|
}
|
||
|
|
static inline void audit_bprm(struct linux_binprm *bprm)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
__audit_bprm(bprm);
|
||
|
|
}
|
||
|
|
static inline int audit_socketcall(int nargs, unsigned long *args)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
return __audit_socketcall(nargs, args);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int audit_socketcall_compat(int nargs, u32 *args)
|
||
|
|
{
|
||
|
|
unsigned long a[AUDITSC_ARGS];
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (audit_dummy_context())
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
for (i = 0; i < nargs; i++)
|
||
|
|
a[i] = (unsigned long)args[i];
|
||
|
|
return __audit_socketcall(nargs, a);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int audit_sockaddr(int len, void *addr)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
return __audit_sockaddr(len, addr);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
__audit_mq_open(oflag, mode, attr);
|
||
|
|
}
|
||
|
|
static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec64 *abs_timeout)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
__audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
|
||
|
|
}
|
||
|
|
static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
__audit_mq_notify(mqdes, notification);
|
||
|
|
}
|
||
|
|
static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
__audit_mq_getsetattr(mqdes, mqstat);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
|
||
|
|
const struct cred *new,
|
||
|
|
const struct cred *old)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
return __audit_log_bprm_fcaps(bprm, new, old);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void audit_log_capset(const struct cred *new,
|
||
|
|
const struct cred *old)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
__audit_log_capset(new, old);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void audit_mmap_fd(int fd, int flags)
|
||
|
|
{
|
||
|
|
if (unlikely(!audit_dummy_context()))
|
||
|
|
__audit_mmap_fd(fd, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void audit_log_kern_module(char *name)
|
||
|
|
{
|
||
|
|
if (!audit_dummy_context())
|
||
|
|
__audit_log_kern_module(name);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void audit_fanotify(unsigned int response)
|
||
|
|
{
|
||
|
|
if (!audit_dummy_context())
|
||
|
|
__audit_fanotify(response);
|
||
|
|
}
|
||
|
|
|
||
|
|
extern int audit_n_rules;
|
||
|
|
extern int audit_signals;
|
||
|
|
#else /* CONFIG_AUDITSYSCALL */
|
||
|
|
static inline int audit_alloc(struct task_struct *task)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
static inline void audit_free(struct task_struct *task)
|
||
|
|
{ }
|
||
|
|
static inline void audit_syscall_entry(int major, unsigned long a0,
|
||
|
|
unsigned long a1, unsigned long a2,
|
||
|
|
unsigned long a3)
|
||
|
|
{ }
|
||
|
|
static inline void audit_syscall_exit(void *pt_regs)
|
||
|
|
{ }
|
||
|
|
static inline bool audit_dummy_context(void)
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
static inline void audit_set_context(struct task_struct *task, struct audit_context *ctx)
|
||
|
|
{ }
|
||
|
|
static inline struct audit_context *audit_context(void)
|
||
|
|
{
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
static inline struct filename *audit_reusename(const __user char *name)
|
||
|
|
{
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
static inline void audit_getname(struct filename *name)
|
||
|
|
{ }
|
||
|
|
static inline void __audit_inode(struct filename *name,
|
||
|
|
const struct dentry *dentry,
|
||
|
|
unsigned int flags)
|
||
|
|
{ }
|
||
|
|
static inline void __audit_inode_child(struct inode *parent,
|
||
|
|
const struct dentry *dentry,
|
||
|
|
const unsigned char type)
|
||
|
|
{ }
|
||
|
|
static inline void audit_inode(struct filename *name,
|
||
|
|
const struct dentry *dentry,
|
||
|
|
unsigned int parent)
|
||
|
|
{ }
|
||
|
|
static inline void audit_file(struct file *file)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
static inline void audit_inode_parent_hidden(struct filename *name,
|
||
|
|
const struct dentry *dentry)
|
||
|
|
{ }
|
||
|
|
static inline void audit_inode_child(struct inode *parent,
|
||
|
|
const struct dentry *dentry,
|
||
|
|
const unsigned char type)
|
||
|
|
{ }
|
||
|
|
static inline void audit_core_dumps(long signr)
|
||
|
|
{ }
|
||
|
|
static inline void audit_seccomp(unsigned long syscall, long signr, int code)
|
||
|
|
{ }
|
||
|
|
static inline void audit_seccomp_actions_logged(const char *names,
|
||
|
|
const char *old_names, int res)
|
||
|
|
{ }
|
||
|
|
static inline int auditsc_get_stamp(struct audit_context *ctx,
|
||
|
|
struct timespec64 *t, unsigned int *serial)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
|
||
|
|
{
|
||
|
|
return INVALID_UID;
|
||
|
|
}
|
||
|
|
static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
|
||
|
|
{
|
||
|
|
return AUDIT_SID_UNSET;
|
||
|
|
}
|
||
|
|
static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
|
||
|
|
{ }
|
||
|
|
static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
|
||
|
|
gid_t gid, umode_t mode)
|
||
|
|
{ }
|
||
|
|
static inline void audit_bprm(struct linux_binprm *bprm)
|
||
|
|
{ }
|
||
|
|
static inline int audit_socketcall(int nargs, unsigned long *args)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int audit_socketcall_compat(int nargs, u32 *args)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void audit_fd_pair(int fd1, int fd2)
|
||
|
|
{ }
|
||
|
|
static inline int audit_sockaddr(int len, void *addr)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
|
||
|
|
{ }
|
||
|
|
static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
|
||
|
|
unsigned int msg_prio,
|
||
|
|
const struct timespec64 *abs_timeout)
|
||
|
|
{ }
|
||
|
|
static inline void audit_mq_notify(mqd_t mqdes,
|
||
|
|
const struct sigevent *notification)
|
||
|
|
{ }
|
||
|
|
static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
|
||
|
|
{ }
|
||
|
|
static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
|
||
|
|
const struct cred *new,
|
||
|
|
const struct cred *old)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
static inline void audit_log_capset(const struct cred *new,
|
||
|
|
const struct cred *old)
|
||
|
|
{ }
|
||
|
|
static inline void audit_mmap_fd(int fd, int flags)
|
||
|
|
{ }
|
||
|
|
|
||
|
|
static inline void audit_log_kern_module(char *name)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void audit_fanotify(unsigned int response)
|
||
|
|
{ }
|
||
|
|
|
||
|
|
static inline void audit_ptrace(struct task_struct *t)
|
||
|
|
{ }
|
||
|
|
#define audit_n_rules 0
|
||
|
|
#define audit_signals 0
|
||
|
|
#endif /* CONFIG_AUDITSYSCALL */
|
||
|
|
|
||
|
|
static inline bool audit_loginuid_set(struct task_struct *tsk)
|
||
|
|
{
|
||
|
|
return uid_valid(audit_get_loginuid(tsk));
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
|
||
|
|
{
|
||
|
|
audit_log_n_string(ab, buf, strlen(buf));
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|