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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 | /* 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 */ #include <linux/fs.h> #include <linux/audit.h> #include <linux/skbuff.h> #include <uapi/linux/mqueue.h> #include <linux/tty.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 */ }; kernel_cap_t ambient; kuid_t rootid; }; /* 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 timespec64 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 timespec64 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; struct { char *name; } module; struct { struct audit_ntp_data ntp_data; struct timespec64 tk_injoffset; } time; }; int fds[2]; struct audit_proctitle proctitle; }; extern bool audit_ever_enabled; extern void audit_log_session_info(struct audit_buffer *ab); extern int auditd_test_task(struct task_struct *task); #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 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 { __u32 portid; struct net *net; struct sk_buff_head q; }; int audit_send_list_thread(void *_dest); extern int selinux_audit_rule_update(void); extern struct mutex audit_filter_mutex; 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); 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 */ #ifdef CONFIG_AUDITSYSCALL extern unsigned int audit_serial(void); extern int auditsc_get_stamp(struct audit_context *ctx, struct timespec64 *t, unsigned int *serial); 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); 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, t, s) 0 #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) #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(context) BUG() static inline int audit_signal_info_syscall(struct task_struct *t) { return 0; } #define audit_filter_inodes(t, c) AUDIT_DISABLED #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); |