diff options
Diffstat (limited to 'kernel/audit.h')
| -rw-r--r-- | kernel/audit.h | 240 |
1 files changed, 134 insertions, 106 deletions
diff --git a/kernel/audit.h b/kernel/audit.h index 123c9b7c3979..7c401729e21b 100644 --- a/kernel/audit.h +++ b/kernel/audit.h @@ -1,34 +1,21 @@ -/* audit -- definition of audit_context structure and supporting types +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* audit -- definition of audit_context structure and supporting types * * Copyright 2003-2004 Red Hat, Inc. * Copyright 2005 Hewlett-Packard Development Company, L.P. * Copyright 2005 IBM Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#ifndef _KERNEL_AUDIT_H_ +#define _KERNEL_AUDIT_H_ + #include <linux/fs.h> #include <linux/audit.h> +#include <linux/security.h> #include <linux/skbuff.h> #include <uapi/linux/mqueue.h> - -/* 0 = no checking - 1 = put_count checking - 2 = verbose put_count checking -*/ -#define AUDIT_DEBUG 0 +#include <linux/tty.h> +#include <uapi/linux/openat2.h> // struct open_how /* AUDIT_NAMES is the number of slots we reserve in the audit_context * for saving names from getname(). If we get more names we will allocate @@ -39,16 +26,16 @@ a per-task filter. At syscall entry, the audit_state is augmented by the syscall filter. */ enum audit_state { - AUDIT_DISABLED, /* Do not create per-task audit_context. + AUDIT_STATE_DISABLED, /* Do not create per-task audit_context. * No syscall-specific audit records can * be generated. */ - AUDIT_BUILD_CONTEXT, /* Create the per-task audit_context, + AUDIT_STATE_BUILD, /* Create the per-task audit_context, * and fill it in at syscall * entry time. This makes a full * syscall record available if some * other part of the kernel decides it * should be recorded. */ - AUDIT_RECORD_CONTEXT /* Create the per-task audit_context, + AUDIT_STATE_RECORD /* Create the per-task audit_context, * always fill it in at syscall entry * time, and always write out the audit * record at syscall exit time. */ @@ -56,6 +43,7 @@ enum audit_state { /* Rule lists */ struct audit_watch; +struct audit_fsnotify_mark; struct audit_tree; struct audit_chunk; @@ -72,11 +60,12 @@ struct audit_cap_data { unsigned int fE; /* effective bit of file cap */ kernel_cap_t effective; /* effective set of process */ }; + kernel_cap_t ambient; + kuid_t rootid; }; -/* When fs/namei.c:getname() is called, we store the pointer in name and - * we don't let putname() free it (instead we free all of the saved - * pointers at syscall exit time). +/* When fs/namei.c:getname() is called, we store the pointer in name and bump + * the refcnt in the associated filename struct. * * Further, in fs/namei.c:path_lookup() we store the inode and device. */ @@ -86,7 +75,6 @@ struct audit_names { struct filename *name; int name_len; /* number of chars to log */ bool hidden; /* don't log this record */ - bool name_put; /* call __putname()? */ unsigned long ino; dev_t dev; @@ -94,7 +82,7 @@ struct audit_names { kuid_t uid; kgid_t gid; dev_t rdev; - u32 osid; + struct lsm_prop oprop; struct audit_cap_data fcap; unsigned int fcap_ver; unsigned char type; /* record type */ @@ -106,14 +94,29 @@ struct audit_names { bool should_free; }; +struct audit_proctitle { + int len; /* length of the cmdline field. */ + char *value; /* the cmdline field */ +}; + +/* A timestamp/serial pair to identify an event */ +struct audit_stamp { + struct timespec64 ctime; /* time of syscall entry */ + unsigned int serial; /* serial number for record */ +}; + /* The per-task audit context. */ struct audit_context { int dummy; /* must be the first element */ - int in_syscall; /* 1 if task is in a syscall */ + enum { + AUDIT_CTX_UNUSED, /* audit_context is currently unused */ + AUDIT_CTX_SYSCALL, /* in use by syscall */ + AUDIT_CTX_URING, /* in use by io_uring */ + } context; enum audit_state state, current_state; - unsigned int serial; /* serial number for record */ + struct audit_stamp stamp; /* event identifier */ int major; /* syscall number */ - struct timespec ctime; /* time of syscall entry */ + int uring_op; /* uring operation */ unsigned long argv[4]; /* syscall arguments */ long return_code;/* syscall return code */ u64 prio; @@ -135,8 +138,8 @@ struct audit_context { struct audit_aux_data *aux_pids; struct sockaddr_storage *sockaddr; size_t sockaddr_len; - /* Save things to print about task_struct */ - pid_t pid, ppid; + /* Save things to print about task_struct */ + pid_t ppid; kuid_t uid, euid, suid, fsuid; kgid_t gid, egid, sgid, fsgid; unsigned long personality; @@ -146,7 +149,7 @@ struct audit_context { kuid_t target_auid; kuid_t target_uid; unsigned int target_sessionid; - u32 target_sid; + struct lsm_prop target_ref; char target_comm[TASK_COMM_LEN]; struct audit_tree_refs *trees, *first_trees; @@ -163,7 +166,7 @@ struct audit_context { kuid_t uid; kgid_t gid; umode_t mode; - u32 osid; + struct lsm_prop oprop; int has_perm; uid_t perm_uid; gid_t perm_gid; @@ -182,7 +185,7 @@ struct audit_context { mqd_t mqdes; size_t msg_len; unsigned int msg_prio; - struct timespec abs_timeout; + struct timespec64 abs_timeout; } mq_sendrecv; struct { int oflag; @@ -197,28 +200,27 @@ struct audit_context { int fd; int flags; } mmap; + struct open_how openat2; + struct { + int argc; + } execve; + struct { + const char *name; + } module; + struct { + struct audit_ntp_data ntp_data; + struct timespec64 tk_injoffset; + } time; }; int fds[2]; - -#if AUDIT_DEBUG - int put_count; - int ino_count; -#endif + struct audit_proctitle proctitle; }; -extern int audit_ever_enabled; +extern bool audit_ever_enabled; -extern void audit_copy_inode(struct audit_names *name, - const struct dentry *dentry, - const struct inode *inode); -extern void audit_log_cap(struct audit_buffer *ab, char *prefix, - kernel_cap_t *cap); -extern void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name); -extern void audit_log_name(struct audit_context *context, - struct audit_names *n, struct path *path, - int record_num, int *call_panic); +extern void audit_log_session_info(struct audit_buffer *ab); -extern int audit_pid; +extern int auditd_test_task(struct task_struct *task); #define AUDIT_INODE_BUCKETS 32 extern struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS]; @@ -236,90 +238,116 @@ extern int audit_comparator(const u32 left, const u32 op, const u32 right); extern int audit_uid_comparator(kuid_t left, u32 op, kuid_t right); extern int audit_gid_comparator(kgid_t left, u32 op, kgid_t right); extern int parent_len(const char *path); -extern int audit_compare_dname_path(const char *dname, const char *path, int plen); -extern struct sk_buff * audit_make_reply(int pid, int seq, int type, - int done, int multi, - const void *payload, int size); +extern int audit_compare_dname_path(const struct qstr *dname, const char *path, int plen); +extern struct sk_buff *audit_make_reply(int seq, int type, int done, int multi, + const void *payload, int size); extern void audit_panic(const char *message); struct audit_netlink_list { - int pid; + __u32 portid; + struct net *net; struct sk_buff_head q; }; -int audit_send_list(void *); - -extern int selinux_audit_rule_update(void); +int audit_send_list_thread(void *_dest); extern struct mutex audit_filter_mutex; -extern void audit_free_rule_rcu(struct rcu_head *); +extern int audit_del_rule(struct audit_entry *entry); +extern void audit_free_rule_rcu(struct rcu_head *head); extern struct list_head audit_filter_list[]; extern struct audit_entry *audit_dupe_rule(struct audit_krule *old); -/* audit watch functions */ -#ifdef CONFIG_AUDIT_WATCH +extern void audit_log_d_path_exe(struct audit_buffer *ab, + struct mm_struct *mm); + +extern struct tty_struct *audit_get_tty(void); +extern void audit_put_tty(struct tty_struct *tty); + +/* audit watch/mark/tree functions */ +extern unsigned int audit_serial(void); +#ifdef CONFIG_AUDITSYSCALL +extern int auditsc_get_stamp(struct audit_context *ctx, + struct audit_stamp *stamp); + extern void audit_put_watch(struct audit_watch *watch); extern void audit_get_watch(struct audit_watch *watch); -extern int audit_to_watch(struct audit_krule *krule, char *path, int len, u32 op); +extern int audit_to_watch(struct audit_krule *krule, char *path, int len, + u32 op); extern int audit_add_watch(struct audit_krule *krule, struct list_head **list); extern void audit_remove_watch_rule(struct audit_krule *krule); extern char *audit_watch_path(struct audit_watch *watch); -extern int audit_watch_compare(struct audit_watch *watch, unsigned long ino, dev_t dev); -#else -#define audit_put_watch(w) {} -#define audit_get_watch(w) {} +extern int audit_watch_compare(struct audit_watch *watch, unsigned long ino, + dev_t dev); + +extern struct audit_fsnotify_mark *audit_alloc_mark(struct audit_krule *krule, + char *pathname, int len); +extern char *audit_mark_path(struct audit_fsnotify_mark *mark); +extern void audit_remove_mark(struct audit_fsnotify_mark *audit_mark); +extern void audit_remove_mark_rule(struct audit_krule *krule); +extern int audit_mark_compare(struct audit_fsnotify_mark *mark, + unsigned long ino, dev_t dev); +extern int audit_dupe_exe(struct audit_krule *new, struct audit_krule *old); +extern int audit_exe_compare(struct task_struct *tsk, + struct audit_fsnotify_mark *mark); + +extern struct audit_chunk *audit_tree_lookup(const struct inode *inode); +extern void audit_put_chunk(struct audit_chunk *chunk); +extern bool audit_tree_match(struct audit_chunk *chunk, + struct audit_tree *tree); +extern int audit_make_tree(struct audit_krule *rule, char *pathname, u32 op); +extern int audit_add_tree_rule(struct audit_krule *rule); +extern int audit_remove_tree_rule(struct audit_krule *rule); +extern void audit_trim_trees(void); +extern int audit_tag_tree(char *old, char *new); +extern const char *audit_tree_path(struct audit_tree *tree); +extern void audit_put_tree(struct audit_tree *tree); +extern void audit_kill_trees(struct audit_context *context); + +extern int audit_signal_info_syscall(struct task_struct *t); +extern void audit_filter_inodes(struct task_struct *tsk, + struct audit_context *ctx); +extern struct list_head *audit_killed_trees(void); +#else /* CONFIG_AUDITSYSCALL */ +#define auditsc_get_stamp(c, s) 0 +#define audit_put_watch(w) do { } while (0) +#define audit_get_watch(w) do { } while (0) #define audit_to_watch(k, p, l, o) (-EINVAL) #define audit_add_watch(k, l) (-EINVAL) #define audit_remove_watch_rule(k) BUG() #define audit_watch_path(w) "" #define audit_watch_compare(w, i, d) 0 -#endif /* CONFIG_AUDIT_WATCH */ +#define audit_alloc_mark(k, p, l) (ERR_PTR(-EINVAL)) +#define audit_mark_path(m) "" +#define audit_remove_mark(m) do { } while (0) +#define audit_remove_mark_rule(k) do { } while (0) +#define audit_mark_compare(m, i, d) 0 +#define audit_exe_compare(t, m) (-EINVAL) +#define audit_dupe_exe(n, o) (-EINVAL) -#ifdef CONFIG_AUDIT_TREE -extern struct audit_chunk *audit_tree_lookup(const struct inode *); -extern void audit_put_chunk(struct audit_chunk *); -extern int audit_tree_match(struct audit_chunk *, struct audit_tree *); -extern int audit_make_tree(struct audit_krule *, char *, u32); -extern int audit_add_tree_rule(struct audit_krule *); -extern int audit_remove_tree_rule(struct audit_krule *); -extern void audit_trim_trees(void); -extern int audit_tag_tree(char *old, char *new); -extern const char *audit_tree_path(struct audit_tree *); -extern void audit_put_tree(struct audit_tree *); -extern void audit_kill_trees(struct list_head *); -#else #define audit_remove_tree_rule(rule) BUG() #define audit_add_tree_rule(rule) -EINVAL #define audit_make_tree(rule, str, op) -EINVAL -#define audit_trim_trees() (void)0 -#define audit_put_tree(tree) (void)0 +#define audit_trim_trees() do { } while (0) +#define audit_put_tree(tree) do { } while (0) #define audit_tag_tree(old, new) -EINVAL #define audit_tree_path(rule) "" /* never called */ -#define audit_kill_trees(list) BUG() -#endif - -extern char *audit_unpack_string(void **, size_t *, size_t); +#define audit_kill_trees(context) BUG() -extern pid_t audit_sig_pid; -extern kuid_t audit_sig_uid; -extern u32 audit_sig_sid; - -#ifdef CONFIG_AUDITSYSCALL -extern int __audit_signal_info(int sig, struct task_struct *t); -static inline int audit_signal_info(int sig, struct task_struct *t) +static inline int audit_signal_info_syscall(struct task_struct *t) { - if (unlikely((audit_pid && t->tgid == audit_pid) || - (audit_signals && !audit_dummy_context()))) - return __audit_signal_info(sig, t); return 0; } -extern void audit_filter_inodes(struct task_struct *, struct audit_context *); -extern struct list_head *audit_killed_trees(void); -#else -#define audit_signal_info(s,t) AUDIT_DISABLED -#define audit_filter_inodes(t,c) AUDIT_DISABLED -#endif -extern struct mutex audit_cmd_mutex; +#define audit_filter_inodes(t, c) do { } while (0) +#endif /* CONFIG_AUDITSYSCALL */ + +extern char *audit_unpack_string(void **bufp, size_t *remain, size_t len); + +extern int audit_filter(int msgtype, unsigned int listtype); + +extern void audit_ctl_lock(void); +extern void audit_ctl_unlock(void); + +#endif |