You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
346 lines
11 KiB
346 lines
11 KiB
/* 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 |
|
*/ |
|
|
|
#include <linux/fs.h> |
|
#include <linux/audit.h> |
|
#include <linux/skbuff.h> |
|
#include <uapi/linux/mqueue.h> |
|
|
|
/* 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 |
|
* a name dynamically and also add those to the list anchored by names_list. */ |
|
#define AUDIT_NAMES 5 |
|
|
|
/* At task start time, the audit_state is set in the audit_context using |
|
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. |
|
* No syscall-specific audit records can |
|
* be generated. */ |
|
AUDIT_BUILD_CONTEXT, /* 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, |
|
* always fill it in at syscall entry |
|
* time, and always write out the audit |
|
* record at syscall exit time. */ |
|
}; |
|
|
|
/* Rule lists */ |
|
struct audit_watch; |
|
struct audit_fsnotify_mark; |
|
struct audit_tree; |
|
struct audit_chunk; |
|
|
|
struct audit_entry { |
|
struct list_head list; |
|
struct rcu_head rcu; |
|
struct audit_krule rule; |
|
}; |
|
|
|
struct audit_cap_data { |
|
kernel_cap_t permitted; |
|
kernel_cap_t inheritable; |
|
union { |
|
unsigned int fE; /* effective bit of file cap */ |
|
kernel_cap_t effective; /* effective set of process */ |
|
}; |
|
}; |
|
|
|
/* 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. |
|
*/ |
|
struct audit_names { |
|
struct list_head list; /* audit_context->names_list */ |
|
|
|
struct filename *name; |
|
int name_len; /* number of chars to log */ |
|
bool hidden; /* don't log this record */ |
|
|
|
unsigned long ino; |
|
dev_t dev; |
|
umode_t mode; |
|
kuid_t uid; |
|
kgid_t gid; |
|
dev_t rdev; |
|
u32 osid; |
|
struct audit_cap_data fcap; |
|
unsigned int fcap_ver; |
|
unsigned char type; /* record type */ |
|
/* |
|
* This was an allocated audit_names and not from the array of |
|
* names allocated in the task audit context. Thus this name |
|
* should be freed on syscall exit. |
|
*/ |
|
bool should_free; |
|
}; |
|
|
|
struct audit_proctitle { |
|
int len; /* length of the cmdline field. */ |
|
char *value; /* the cmdline field */ |
|
}; |
|
|
|
/* 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_state state, current_state; |
|
unsigned int serial; /* serial number for record */ |
|
int major; /* syscall number */ |
|
struct timespec ctime; /* time of syscall entry */ |
|
unsigned long argv[4]; /* syscall arguments */ |
|
long return_code;/* syscall return code */ |
|
u64 prio; |
|
int return_valid; /* return code is valid */ |
|
/* |
|
* The names_list is the list of all audit_names collected during this |
|
* syscall. The first AUDIT_NAMES entries in the names_list will |
|
* actually be from the preallocated_names array for performance |
|
* reasons. Except during allocation they should never be referenced |
|
* through the preallocated_names array and should only be found/used |
|
* by running the names_list. |
|
*/ |
|
struct audit_names preallocated_names[AUDIT_NAMES]; |
|
int name_count; /* total records in names_list */ |
|
struct list_head names_list; /* struct audit_names->list anchor */ |
|
char *filterkey; /* key for rule that triggered record */ |
|
struct path pwd; |
|
struct audit_aux_data *aux; |
|
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; |
|
kuid_t uid, euid, suid, fsuid; |
|
kgid_t gid, egid, sgid, fsgid; |
|
unsigned long personality; |
|
int arch; |
|
|
|
pid_t target_pid; |
|
kuid_t target_auid; |
|
kuid_t target_uid; |
|
unsigned int target_sessionid; |
|
u32 target_sid; |
|
char target_comm[TASK_COMM_LEN]; |
|
|
|
struct audit_tree_refs *trees, *first_trees; |
|
struct list_head killed_trees; |
|
int tree_count; |
|
|
|
int type; |
|
union { |
|
struct { |
|
int nargs; |
|
long args[6]; |
|
} socketcall; |
|
struct { |
|
kuid_t uid; |
|
kgid_t gid; |
|
umode_t mode; |
|
u32 osid; |
|
int has_perm; |
|
uid_t perm_uid; |
|
gid_t perm_gid; |
|
umode_t perm_mode; |
|
unsigned long qbytes; |
|
} ipc; |
|
struct { |
|
mqd_t mqdes; |
|
struct mq_attr mqstat; |
|
} mq_getsetattr; |
|
struct { |
|
mqd_t mqdes; |
|
int sigev_signo; |
|
} mq_notify; |
|
struct { |
|
mqd_t mqdes; |
|
size_t msg_len; |
|
unsigned int msg_prio; |
|
struct timespec abs_timeout; |
|
} mq_sendrecv; |
|
struct { |
|
int oflag; |
|
umode_t mode; |
|
struct mq_attr attr; |
|
} mq_open; |
|
struct { |
|
pid_t pid; |
|
struct audit_cap_data cap; |
|
} capset; |
|
struct { |
|
int fd; |
|
int flags; |
|
} mmap; |
|
struct { |
|
int argc; |
|
} execve; |
|
}; |
|
int fds[2]; |
|
struct audit_proctitle proctitle; |
|
}; |
|
|
|
extern u32 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_name(struct audit_context *context, |
|
struct audit_names *n, struct path *path, |
|
int record_num, int *call_panic); |
|
|
|
extern int audit_pid; |
|
|
|
#define AUDIT_INODE_BUCKETS 32 |
|
extern struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS]; |
|
|
|
static inline int audit_hash_ino(u32 ino) |
|
{ |
|
return (ino & (AUDIT_INODE_BUCKETS-1)); |
|
} |
|
|
|
/* Indicates that audit should log the full pathname. */ |
|
#define AUDIT_NAME_FULL -1 |
|
|
|
extern int audit_match_class(int class, unsigned syscall); |
|
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(__u32 portid, int seq, int type, |
|
int done, int multi, |
|
const void *payload, int size); |
|
extern void audit_panic(const char *message); |
|
|
|
struct audit_netlink_list { |
|
__u32 portid; |
|
struct net *net; |
|
struct sk_buff_head q; |
|
}; |
|
|
|
int audit_send_list(void *); |
|
|
|
struct audit_net { |
|
struct sock *nlsk; |
|
}; |
|
|
|
extern int selinux_audit_rule_update(void); |
|
|
|
extern struct mutex audit_filter_mutex; |
|
extern int audit_del_rule(struct audit_entry *); |
|
extern void audit_free_rule_rcu(struct rcu_head *); |
|
extern struct list_head audit_filter_list[]; |
|
|
|
extern struct audit_entry *audit_dupe_rule(struct audit_krule *old); |
|
|
|
extern void audit_log_d_path_exe(struct audit_buffer *ab, |
|
struct mm_struct *mm); |
|
|
|
/* audit watch functions */ |
|
#ifdef CONFIG_AUDIT_WATCH |
|
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_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); |
|
|
|
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); |
|
|
|
#else |
|
#define audit_put_watch(w) {} |
|
#define audit_get_watch(w) {} |
|
#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 |
|
|
|
#define audit_alloc_mark(k, p, l) (ERR_PTR(-EINVAL)) |
|
#define audit_mark_path(m) "" |
|
#define audit_remove_mark(m) |
|
#define audit_remove_mark_rule(k) |
|
#define audit_mark_compare(m, i, d) 0 |
|
#define audit_exe_compare(t, m) (-EINVAL) |
|
#define audit_dupe_exe(n, o) (-EINVAL) |
|
#endif /* CONFIG_AUDIT_WATCH */ |
|
|
|
#ifdef CONFIG_AUDIT_TREE |
|
extern struct audit_chunk *audit_tree_lookup(const struct inode *); |
|
extern void audit_put_chunk(struct audit_chunk *); |
|
extern bool 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_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); |
|
|
|
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) |
|
{ |
|
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;
|
|
|