bsd/security/audit/audit_arg.c

   1 /*-
   2  * Copyright (c) 1999-2016 Apple Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
  14  *     its contributors may be used to endorse or promote products derived
  15  *     from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR
  21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  25  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  26  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27  * POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  */
  30 /*
  31  * NOTICE: This file was modified by McAfee Research in 2004 to introduce
  32  * support for mandatory and extensible security protections.  This notice
  33  * is included in support of clause 2.2 (b) of the Apple Public License,
  34  * Version 2.0.
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/fcntl.h>
  39 #include <sys/kernel.h>
  40 #include <sys/lock.h>
  41 #include <sys/namei.h>
  42 #include <sys/proc_internal.h>
  43 #include <sys/kauth.h>
  44 #include <sys/queue.h>
  45 #include <sys/systm.h>
  46 #include <sys/time.h>
  47 #include <sys/ucred.h>
  48 #include <sys/uio.h>
  49 #include <sys/unistd.h>
  50 #include <sys/file_internal.h>
  51 #include <sys/vnode_internal.h>
  52 #include <sys/user.h>
  53 #include <sys/syscall.h>
  54 #include <sys/malloc.h>
  55 #include <sys/un.h>
  56 #include <sys/sysent.h>
  57 #include <sys/sysproto.h>
  58 #include <sys/vfs_context.h>
  59 #include <sys/domain.h>
  60 #include <sys/protosw.h>
  61 #include <sys/socketvar.h>
  62
  63 #include <bsm/audit.h>
  64 #include <bsm/audit_internal.h>
  65 #include <bsm/audit_kevents.h>
  66
  67 #include <security/audit/audit.h>
  68 #include <security/audit/audit_bsd.h>
  69 #include <security/audit/audit_private.h>
  70
  71 #include <mach/host_priv.h>
  72 #include <mach/host_special_ports.h>
  73 #include <mach/audit_triggers_server.h>
  74
  75 #include <kern/host.h>
  76 #include <kern/kalloc.h>
  77 #include <kern/zalloc.h>
  78 #include <kern/sched_prim.h>
  79
  80 #if CONFIG_MACF
  81 #include <bsm/audit_record.h>
  82 #include <security/mac.h>
  83 #include <security/mac_framework.h>
  84 #include <security/mac_policy.h>
  85 extern zone_t audit_mac_label_zone;
  86 #endif
  87
  88 #include <net/route.h>
  89
  90 #include <netinet/in.h>
  91 #include <netinet/in_pcb.h>
  92
  93 #if CONFIG_AUDIT
  94 /*
  95  * Calls to manipulate elements of the audit record structure from system
  96  * call code.  Macro wrappers will prevent this functions from being entered
  97  * if auditing is disabled, avoiding the function call cost.  We check the
  98  * thread audit record pointer anyway, as the audit condition could change,
  99  * and pre-selection may not have allocated an audit record for this event.
 100  *
 101  * XXXAUDIT: Should we assert, in each case, that this field of the record
 102  * hasn't already been filled in?
 103  */
 104 void
 105 audit_arg_addr(struct kaudit_record *ar, user_addr_t addr)
 106 {
 107         struct proc *p = current_proc();
 108
 109         ar->k_ar.ar_arg_addr = addr;
 110
 111         /*
 112          * If the process is 64-bit then flag the address as such.
 113          */
 114         if (proc_is64bit(p))
 115                 ARG_SET_VALID(ar, ARG_ADDR64);
 116         else
 117                 ARG_SET_VALID(ar, ARG_ADDR32);
 118 }
 119
 120 void
 121 audit_arg_exit(struct kaudit_record *ar, int status, int retval)
 122 {
 123
 124         ar->k_ar.ar_arg_exitstatus = status;
 125         ar->k_ar.ar_arg_exitretval = retval;
 126         ARG_SET_VALID(ar, ARG_EXIT);
 127 }
 128
 129 void
 130 audit_arg_len(struct kaudit_record *ar, user_size_t len)
 131 {
 132
 133         ar->k_ar.ar_arg_len = len;
 134         ARG_SET_VALID(ar, ARG_LEN);
 135 }
 136
 137 void
 138 audit_arg_fd2(struct kaudit_record *ar, int fd)
 139 {
 140
 141         ar->k_ar.ar_arg_fd2 = fd;
 142         ARG_SET_VALID(ar, ARG_FD2);
 143 }
 144
 145 void
 146 audit_arg_fd(struct kaudit_record *ar, int fd)
 147 {
 148
 149         ar->k_ar.ar_arg_fd = fd;
 150         ARG_SET_VALID(ar, ARG_FD);
 151 }
 152
 153 void
 154 audit_arg_fflags(struct kaudit_record *ar, int fflags)
 155 {
 156
 157         ar->k_ar.ar_arg_fflags = fflags;
 158         ARG_SET_VALID(ar, ARG_FFLAGS);
 159 }
 160
 161 void
 162 audit_arg_gid(struct kaudit_record *ar, gid_t gid)
 163 {
 164
 165         ar->k_ar.ar_arg_gid = gid;
 166         ARG_SET_VALID(ar, ARG_GID);
 167 }
 168
 169 void
 170 audit_arg_uid(struct kaudit_record *ar, uid_t uid)
 171 {
 172
 173         ar->k_ar.ar_arg_uid = uid;
 174         ARG_SET_VALID(ar, ARG_UID);
 175 }
 176
 177 void
 178 audit_arg_egid(struct kaudit_record *ar, gid_t egid)
 179 {
 180
 181         ar->k_ar.ar_arg_egid = egid;
 182         ARG_SET_VALID(ar, ARG_EGID);
 183 }
 184
 185 void
 186 audit_arg_euid(struct kaudit_record *ar, uid_t euid)
 187 {
 188
 189         ar->k_ar.ar_arg_euid = euid;
 190         ARG_SET_VALID(ar, ARG_EUID);
 191 }
 192
 193 void
 194 audit_arg_rgid(struct kaudit_record *ar, gid_t rgid)
 195 {
 196
 197         ar->k_ar.ar_arg_rgid = rgid;
 198         ARG_SET_VALID(ar, ARG_RGID);
 199 }
 200
 201 void
 202 audit_arg_ruid(struct kaudit_record *ar, uid_t ruid)
 203 {
 204
 205         ar->k_ar.ar_arg_ruid = ruid;
 206         ARG_SET_VALID(ar, ARG_RUID);
 207 }
 208
 209 void
 210 audit_arg_sgid(struct kaudit_record *ar, gid_t sgid)
 211 {
 212
 213         ar->k_ar.ar_arg_sgid = sgid;
 214         ARG_SET_VALID(ar, ARG_SGID);
 215 }
 216
 217 void
 218 audit_arg_suid(struct kaudit_record *ar, uid_t suid)
 219 {
 220
 221         ar->k_ar.ar_arg_suid = suid;
 222         ARG_SET_VALID(ar, ARG_SUID);
 223 }
 224
 225 void
 226 audit_arg_groupset(struct kaudit_record *ar, gid_t *gidset, u_int gidset_size)
 227 {
 228         u_int i;
 229
 230         for (i = 0; i < gidset_size; i++)
 231                 ar->k_ar.ar_arg_groups.gidset[i] = gidset[i];
 232         ar->k_ar.ar_arg_groups.gidset_size = gidset_size;
 233         ARG_SET_VALID(ar, ARG_GROUPSET);
 234 }
 235
 236 void
 237 audit_arg_login(struct kaudit_record *ar, char *login)
 238 {
 239
 240         strlcpy(ar->k_ar.ar_arg_login, login, MAXLOGNAME);
 241         ARG_SET_VALID(ar, ARG_LOGIN);
 242 }
 243
 244 void
 245 audit_arg_ctlname(struct kaudit_record *ar, int *name, int namelen)
 246 {
 247
 248         bcopy(name, &ar->k_ar.ar_arg_ctlname, namelen * sizeof(int));
 249         ar->k_ar.ar_arg_len = namelen;
 250         ARG_SET_VALID(ar, ARG_CTLNAME | ARG_LEN);
 251 }
 252
 253 void
 254 audit_arg_mask(struct kaudit_record *ar, int mask)
 255 {
 256
 257         ar->k_ar.ar_arg_mask = mask;
 258         ARG_SET_VALID(ar, ARG_MASK);
 259 }
 260
 261 void
 262 audit_arg_mode(struct kaudit_record *ar, mode_t mode)
 263 {
 264
 265         ar->k_ar.ar_arg_mode = mode;
 266         ARG_SET_VALID(ar, ARG_MODE);
 267 }
 268
 269 void
 270 audit_arg_value32(struct kaudit_record *ar, uint32_t value32)
 271 {
 272
 273         ar->k_ar.ar_arg_value32 = value32;
 274         ARG_SET_VALID(ar, ARG_VALUE32);
 275 }
 276
 277 void
 278 audit_arg_value64(struct kaudit_record *ar, uint64_t value64)
 279 {
 280
 281         ar->k_ar.ar_arg_value64 = value64;
 282         ARG_SET_VALID(ar, ARG_VALUE64);
 283 }
 284
 285 void
 286 audit_arg_owner(struct kaudit_record *ar, uid_t uid, gid_t gid)
 287 {
 288
 289         ar->k_ar.ar_arg_uid = uid;
 290         ar->k_ar.ar_arg_gid = gid;
 291         ARG_SET_VALID(ar, ARG_UID | ARG_GID);
 292 }
 293
 294 void
 295 audit_arg_pid(struct kaudit_record *ar, pid_t pid)
 296 {
 297
 298         ar->k_ar.ar_arg_pid = pid;
 299         ARG_SET_VALID(ar, ARG_PID);
 300 }
 301
 302 void
 303 audit_arg_process(struct kaudit_record *ar, proc_t p)
 304 {
 305         kauth_cred_t my_cred;
 306
 307         KASSERT(p != NULL, ("audit_arg_process: p == NULL"));
 308
 309         if ( p == NULL)
 310                 return;
 311
 312         my_cred = kauth_cred_proc_ref(p);
 313         ar->k_ar.ar_arg_auid = my_cred->cr_audit.as_aia_p->ai_auid;
 314         ar->k_ar.ar_arg_asid = my_cred->cr_audit.as_aia_p->ai_asid;
 315         bcopy(&my_cred->cr_audit.as_aia_p->ai_termid,
 316             &ar->k_ar.ar_arg_termid_addr, sizeof(au_tid_addr_t));
 317         ar->k_ar.ar_arg_euid = kauth_cred_getuid(my_cred);
 318         ar->k_ar.ar_arg_egid = kauth_cred_getgid(my_cred);
 319         ar->k_ar.ar_arg_ruid = kauth_cred_getruid(my_cred);
 320         ar->k_ar.ar_arg_rgid = kauth_cred_getrgid(my_cred);
 321         kauth_cred_unref(&my_cred);
 322         ar->k_ar.ar_arg_pid = p->p_pid;
 323         ARG_SET_VALID(ar, ARG_AUID | ARG_EUID | ARG_EGID | ARG_RUID |
 324             ARG_RGID | ARG_ASID | ARG_TERMID_ADDR | ARG_PID | ARG_PROCESS);
 325 }
 326
 327 void
 328 audit_arg_signum(struct kaudit_record *ar, u_int signum)
 329 {
 330
 331         ar->k_ar.ar_arg_signum = signum;
 332         ARG_SET_VALID(ar, ARG_SIGNUM);
 333 }
 334
 335 void
 336 audit_arg_socket(struct kaudit_record *ar, int sodomain, int sotype,
 337     int soprotocol)
 338 {
 339
 340         ar->k_ar.ar_arg_sockinfo.sai_domain = sodomain;
 341         ar->k_ar.ar_arg_sockinfo.sai_type = sotype;
 342         ar->k_ar.ar_arg_sockinfo.sai_protocol = soprotocol;
 343         ARG_SET_VALID(ar, ARG_SOCKINFO);
 344 }
 345
 346 /*
 347  * Note that the current working directory vp must be supplied at the audit
 348  * call site to permit per thread current working directories, and that it
 349  * must take a upath starting with '/' into account for chroot if the path
 350  * is absolute.  This results in the real (non-chroot) path being recorded
 351  * in the audit record.
 352  */
 353 void
 354 audit_arg_sockaddr(struct kaudit_record *ar, struct vnode *cwd_vp,
 355     struct sockaddr *sa)
 356 {
 357         int slen;
 358         struct sockaddr_un *sun;
 359         char path[SOCK_MAXADDRLEN - offsetof(struct sockaddr_un, sun_path) + 1];
 360
 361         KASSERT(sa != NULL, ("audit_arg_sockaddr: sa == NULL"));
 362
 363         if (cwd_vp == NULL || sa == NULL)
 364                 return;
 365
 366         bcopy(sa, &ar->k_ar.ar_arg_sockaddr, sa->sa_len);
 367         switch (sa->sa_family) {
 368         case AF_INET:
 369                 ARG_SET_VALID(ar, ARG_SADDRINET);
 370                 break;
 371
 372         case AF_INET6:
 373                 ARG_SET_VALID(ar, ARG_SADDRINET6);
 374                 break;
 375
 376         case AF_UNIX:
 377                 sun = (struct sockaddr_un *)sa;
 378                 slen = sun->sun_len - offsetof(struct sockaddr_un, sun_path);
 379
 380                 if (slen >= 0) {
 381                         /*
 382                          * Make sure the path is NULL-terminated
 383                          */
 384                         if (sun->sun_path[slen] != 0) {
 385                                 bcopy(sun->sun_path, path, slen);
 386                                 path[slen] = 0;
 387                                 audit_arg_upath(ar, cwd_vp, path, ARG_UPATH1);
 388                         } else {
 389                                 audit_arg_upath(ar, cwd_vp, sun->sun_path,
 390                                         ARG_UPATH1);
 391                         }
 392                 }
 393                 ARG_SET_VALID(ar, ARG_SADDRUNIX);
 394                 break;
 395         /* XXXAUDIT: default:? */
 396         }
 397 }
 398
 399 void
 400 audit_arg_auid(struct kaudit_record *ar, uid_t auid)
 401 {
 402
 403         ar->k_ar.ar_arg_auid = auid;
 404         ARG_SET_VALID(ar, ARG_AUID);
 405 }
 406
 407 void
 408 audit_arg_auditinfo(struct kaudit_record *ar, struct auditinfo *au_info)
 409 {
 410
 411         ar->k_ar.ar_arg_auid = au_info->ai_auid;
 412         ar->k_ar.ar_arg_asid = au_info->ai_asid;
 413         ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success;
 414         ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure;
 415         ar->k_ar.ar_arg_termid.port = au_info->ai_termid.port;
 416         ar->k_ar.ar_arg_termid.machine = au_info->ai_termid.machine;
 417         ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID);
 418 }
 419
 420 void
 421 audit_arg_auditinfo_addr(struct kaudit_record *ar,
 422     struct auditinfo_addr *au_info)
 423 {
 424
 425         ar->k_ar.ar_arg_auid = au_info->ai_auid;
 426         ar->k_ar.ar_arg_asid = au_info->ai_asid;
 427         ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success;
 428         ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure;
 429         ar->k_ar.ar_arg_termid_addr.at_type = au_info->ai_termid.at_type;
 430         ar->k_ar.ar_arg_termid_addr.at_port = au_info->ai_termid.at_port;
 431         ar->k_ar.ar_arg_termid_addr.at_addr[0] = au_info->ai_termid.at_addr[0];
 432         ar->k_ar.ar_arg_termid_addr.at_addr[1] = au_info->ai_termid.at_addr[1];
 433         ar->k_ar.ar_arg_termid_addr.at_addr[2] = au_info->ai_termid.at_addr[2];
 434         ar->k_ar.ar_arg_termid_addr.at_addr[3] = au_info->ai_termid.at_addr[3];
 435         ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID_ADDR);
 436 }
 437
 438 void
 439 audit_arg_text(struct kaudit_record *ar, char *text)
 440 {
 441
 442         KASSERT(text != NULL, ("audit_arg_text: text == NULL"));
 443
 444         /* Invalidate the text string */
 445         ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_TEXT);
 446         if (text == NULL)
 447                 return;
 448
 449         if (ar->k_ar.ar_arg_text == NULL)
 450                 ar->k_ar.ar_arg_text = malloc(MAXPATHLEN, M_AUDITTEXT,
 451                     M_WAITOK);
 452
 453         strncpy(ar->k_ar.ar_arg_text, text, MAXPATHLEN);
 454         ARG_SET_VALID(ar, ARG_TEXT);
 455 }
 456
 457 void
 458 audit_arg_opaque(struct kaudit_record *ar, void *data, size_t size)
 459 {
 460
 461         KASSERT(data != NULL, ("audit_arg_opaque: data == NULL"));
 462         KASSERT(size <= UINT16_MAX, ("audit_arg_opaque: size > UINT16_MAX"));
 463
 464         if (data == NULL || size > UINT16_MAX)
 465                 return;
 466
 467         if (ar->k_ar.ar_arg_opaque == NULL)
 468                 ar->k_ar.ar_arg_opaque = malloc(size, M_AUDITDATA, M_WAITOK);
 469         else
 470                 return;
 471
 472         memcpy(ar->k_ar.ar_arg_opaque, data, size);
 473         ar->k_ar.ar_arg_opq_size = (u_int16_t) size;
 474         ARG_SET_VALID(ar, ARG_OPAQUE);
 475 }
 476
 477 void
 478 audit_arg_data(struct kaudit_record *ar, void *data, size_t size, size_t number)
 479 {
 480         size_t sz;
 481
 482         KASSERT(data != NULL, ("audit_arg_data: data == NULL"));
 483         KASSERT(size >= AUR_BYTE_SIZE && size <= AUR_INT64_SIZE,
 484             ("audit_arg_data: size < AUR_BYTE_SIZE or size > AUR_INT64_SIZE"));
 485         KASSERT(number <= UINT8_MAX,
 486             ("audit_arg_data: number > UINT8_MAX"));
 487
 488         if (data == NULL || size < AUR_BYTE_SIZE || size > AUR_INT64_SIZE ||
 489             number > UINT8_MAX)
 490                 return;
 491
 492         sz = size * number;
 493
 494         if (ar->k_ar.ar_arg_data == NULL)
 495                 ar->k_ar.ar_arg_data = malloc(sz, M_AUDITDATA, M_WAITOK);
 496         else
 497                 return;
 498
 499         memcpy(ar->k_ar.ar_arg_data, data, sz);
 500
 501         switch(size) {
 502         case AUR_BYTE_SIZE:
 503                 ar->k_ar.ar_arg_data_type = AUR_BYTE;
 504                 break;
 505
 506         case AUR_SHORT_SIZE:
 507                 ar->k_ar.ar_arg_data_type = AUR_SHORT;
 508                 break;
 509
 510         case AUR_INT32_SIZE:
 511                 ar->k_ar.ar_arg_data_type = AUR_INT32;
 512                 break;
 513
 514         case AUR_INT64_SIZE:
 515                 ar->k_ar.ar_arg_data_type = AUR_INT64;
 516                 break;
 517
 518         default:
 519                 free(ar->k_ar.ar_arg_data, M_AUDITDATA);
 520                 ar->k_ar.ar_arg_data = NULL;
 521                 return;
 522         }
 523
 524         ar->k_ar.ar_arg_data_count = (u_char)number;
 525
 526         ARG_SET_VALID(ar, ARG_DATA);
 527 }
 528
 529 void
 530 audit_arg_cmd(struct kaudit_record *ar, int cmd)
 531 {
 532
 533         ar->k_ar.ar_arg_cmd = cmd;
 534         ARG_SET_VALID(ar, ARG_CMD);
 535 }
 536
 537 void
 538 audit_arg_svipc_cmd(struct kaudit_record *ar, int cmd)
 539 {
 540
 541         ar->k_ar.ar_arg_svipc_cmd = cmd;
 542         ARG_SET_VALID(ar, ARG_SVIPC_CMD);
 543 }
 544
 545 void
 546 audit_arg_svipc_perm(struct kaudit_record *ar, struct ipc_perm *perm)
 547 {
 548
 549         bcopy(perm, &ar->k_ar.ar_arg_svipc_perm,
 550             sizeof(ar->k_ar.ar_arg_svipc_perm));
 551         ARG_SET_VALID(ar, ARG_SVIPC_PERM);
 552 }
 553
 554 void
 555 audit_arg_svipc_id(struct kaudit_record *ar, int id)
 556 {
 557
 558         ar->k_ar.ar_arg_svipc_id = id;
 559         ARG_SET_VALID(ar, ARG_SVIPC_ID);
 560 }
 561
 562 void
 563 audit_arg_svipc_addr(struct kaudit_record *ar, user_addr_t addr)
 564 {
 565
 566         ar->k_ar.ar_arg_svipc_addr = addr;
 567         ARG_SET_VALID(ar, ARG_SVIPC_ADDR);
 568 }
 569
 570 void
 571 audit_arg_posix_ipc_perm(struct kaudit_record *ar, uid_t uid, gid_t gid,
 572     mode_t mode)
 573 {
 574
 575         ar->k_ar.ar_arg_pipc_perm.pipc_uid = uid;
 576         ar->k_ar.ar_arg_pipc_perm.pipc_gid = gid;
 577         ar->k_ar.ar_arg_pipc_perm.pipc_mode = mode;
 578         ARG_SET_VALID(ar, ARG_POSIX_IPC_PERM);
 579 }
 580
 581 void
 582 audit_arg_auditon(struct kaudit_record *ar, union auditon_udata *udata)
 583 {
 584
 585         bcopy((void *)udata, &ar->k_ar.ar_arg_auditon,
 586             sizeof(ar->k_ar.ar_arg_auditon));
 587         ARG_SET_VALID(ar, ARG_AUDITON);
 588 }
 589
 590 /*
 591  * Audit information about a file, either the file's vnode info, or its
 592  * socket address info.
 593  */
 594 void
 595 audit_arg_file(struct kaudit_record *ar, __unused proc_t p,
 596     struct fileproc *fp)
 597 {
 598         struct socket *so;
 599         struct inpcb *pcb;
 600         struct sockaddr_in *sin;
 601         struct sockaddr_in6 *sin6;
 602
 603         switch (FILEGLOB_DTYPE(fp->f_fglob)) {
 604         case DTYPE_VNODE:
 605         /* case DTYPE_FIFO: */
 606                 audit_arg_vnpath_withref(ar,
 607                     (struct vnode *)fp->f_fglob->fg_data, ARG_VNODE1);
 608                 break;
 609
 610         case DTYPE_SOCKET:
 611                 so = (struct socket *)fp->f_fglob->fg_data;
 612                 if (SOCK_CHECK_DOM(so, PF_INET)) {
 613                         if (so->so_pcb == NULL)
 614                                 break;
 615                         ar->k_ar.ar_arg_sockinfo.sai_type =
 616                             so->so_type;
 617                         ar->k_ar.ar_arg_sockinfo.sai_domain = SOCK_DOM(so);
 618                         ar->k_ar.ar_arg_sockinfo.sai_protocol = SOCK_PROTO(so);
 619                         pcb = (struct inpcb *)so->so_pcb;
 620                         sin = (struct sockaddr_in *)
 621                             &ar->k_ar.ar_arg_sockinfo.sai_faddr;
 622                         sin->sin_addr.s_addr = pcb->inp_faddr.s_addr;
 623                         sin->sin_port = pcb->inp_fport;
 624                         sin = (struct sockaddr_in *)
 625                             &ar->k_ar.ar_arg_sockinfo.sai_laddr;
 626                         sin->sin_addr.s_addr = pcb->inp_laddr.s_addr;
 627                         sin->sin_port = pcb->inp_lport;
 628                         ARG_SET_VALID(ar, ARG_SOCKINFO);
 629                 }
 630                 if (SOCK_CHECK_DOM(so, PF_INET6)) {
 631                         if (so->so_pcb == NULL)
 632                                 break;
 633                         ar->k_ar.ar_arg_sockinfo.sai_type =
 634                             so->so_type;
 635                         ar->k_ar.ar_arg_sockinfo.sai_domain = SOCK_DOM(so);
 636                         ar->k_ar.ar_arg_sockinfo.sai_protocol = SOCK_PROTO(so);
 637                         pcb = (struct inpcb *)so->so_pcb;
 638                         sin6 = (struct sockaddr_in6 *)
 639                             &ar->k_ar.ar_arg_sockinfo.sai_faddr;
 640                         sin6->sin6_addr = pcb->in6p_faddr;
 641                         sin6->sin6_port = pcb->in6p_fport;
 642                         sin6 = (struct sockaddr_in6 *)
 643                             &ar->k_ar.ar_arg_sockinfo.sai_laddr;
 644                         sin6->sin6_addr = pcb->in6p_laddr;
 645                         sin6->sin6_port = pcb->in6p_lport;
 646                         ARG_SET_VALID(ar, ARG_SOCKINFO);
 647                 }
 648                 break;
 649
 650         default:
 651                 /* XXXAUDIT: else? */
 652                 break;
 653         }
 654 }
 655
 656 /*
 657  * Store a path as given by the user process for auditing into the audit
 658  * record stored on the user thread.  This function will allocate the memory
 659  * to store the path info if not already available.  This memory will be
 660  * freed when the audit record is freed.
 661  *
 662  * Note that the current working directory vp must be supplied at the audit call
 663  * site to permit per thread current working directories, and that it must take
 664  * a upath starting with '/' into account for chroot if the path is absolute.
 665  * This results in the real (non-chroot) path being recorded in the audit
 666  * record.
 667  *
 668  * XXXAUDIT: Possibly assert that the memory isn't already allocated?
 669  */
 670 void
 671 audit_arg_upath(struct kaudit_record *ar, struct vnode *cwd_vp, char *upath, u_int64_t flag)
 672 {
 673         char **pathp;
 674
 675         KASSERT(upath != NULL, ("audit_arg_upath: upath == NULL"));
 676         KASSERT((flag == ARG_UPATH1) || (flag == ARG_UPATH2),
 677             ("audit_arg_upath: flag %llu", (unsigned long long)flag));
 678         KASSERT((flag != ARG_UPATH1) || (flag != ARG_UPATH2),
 679             ("audit_arg_upath: flag %llu", (unsigned long long)flag));
 680
 681         if (flag == ARG_UPATH1)
 682                 pathp = &ar->k_ar.ar_arg_upath1;
 683         else
 684                 pathp = &ar->k_ar.ar_arg_upath2;
 685
 686         if (*pathp == NULL)
 687                 *pathp = malloc(MAXPATHLEN, M_AUDITPATH, M_WAITOK);
 688         else
 689                 return;
 690
 691         if (audit_canon_path(cwd_vp, upath, *pathp) == 0)
 692                 ARG_SET_VALID(ar, flag);
 693         else {
 694                 free(*pathp, M_AUDITPATH);
 695                 *pathp = NULL;
 696         }
 697 }
 698
 699 /*
 700  * Function to save the path and vnode attr information into the audit
 701  * record.
 702  *
 703  * It is assumed that the caller will hold any vnode locks necessary to
 704  * perform a VNOP_GETATTR() on the passed vnode.
 705  *
 706  * XXX: The attr code is very similar to vfs_vnops.c:vn_stat(), but always
 707  * provides access to the generation number as we need that to construct the
 708  * BSM file ID.
 709  *
 710  * XXX: We should accept the process argument from the caller, since it's
 711  * very likely they already have a reference.
 712  *
 713  * XXX: Error handling in this function is poor.
 714  *
 715  * XXXAUDIT: Possibly KASSERT the path pointer is NULL?
 716  */
 717 void
 718 audit_arg_vnpath(struct kaudit_record *ar, struct vnode *vp, u_int64_t flags)
 719 {
 720         struct vnode_attr va;
 721         int error;
 722         int len;
 723         char **pathp;
 724         struct vnode_au_info *vnp;
 725         proc_t p;
 726 #if CONFIG_MACF
 727         char **vnode_mac_labelp;
 728         struct mac mac;
 729 #endif
 730
 731         KASSERT(vp != NULL, ("audit_arg_vnpath: vp == NULL"));
 732         KASSERT((flags == ARG_VNODE1) || (flags == ARG_VNODE2),
 733             ("audit_arg_vnpath: flags != ARG_VNODE[1,2]"));
 734
 735         p = current_proc();
 736
 737         /*
 738          * XXXAUDIT: The below clears, and then resets the flags for valid
 739          * arguments.  Ideally, either the new vnode is used, or the old one
 740          * would be.
 741          */
 742         if (flags & ARG_VNODE1) {
 743                 ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_KPATH1);
 744                 ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_VNODE1);
 745                 pathp = &ar->k_ar.ar_arg_kpath1;
 746                 vnp = &ar->k_ar.ar_arg_vnode1;
 747 #if CONFIG_MACF
 748                 vnode_mac_labelp = &ar->k_ar.ar_vnode1_mac_labels;
 749 #endif
 750         } else {
 751                 ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_KPATH2);
 752                 ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_VNODE2);
 753                 pathp = &ar->k_ar.ar_arg_kpath2;
 754                 vnp = &ar->k_ar.ar_arg_vnode2;
 755 #if CONFIG_MACF
 756                 vnode_mac_labelp = &ar->k_ar.ar_vnode2_mac_labels;
 757 #endif
 758         }
 759
 760         if (*pathp == NULL)
 761                 *pathp = malloc(MAXPATHLEN, M_AUDITPATH, M_WAITOK);
 762         else
 763                 return;
 764
 765         /*
 766          * If vn_getpath() succeeds, place it in a string buffer
 767          * attached to the audit record, and set a flag indicating
 768          * it is present.
 769          */
 770         len = MAXPATHLEN;
 771         if (vn_getpath(vp, *pathp, &len) == 0) {
 772                 if (flags & ARG_VNODE1)
 773                         ARG_SET_VALID(ar, ARG_KPATH1);
 774                 else
 775                         ARG_SET_VALID(ar, ARG_KPATH2);
 776         } else {
 777                 free(*pathp, M_AUDITPATH);
 778                 *pathp = NULL;
 779         }
 780
 781         VATTR_INIT(&va);
 782         VATTR_WANTED(&va, va_mode);
 783         VATTR_WANTED(&va, va_uid);
 784         VATTR_WANTED(&va, va_gid);
 785         VATTR_WANTED(&va, va_rdev);
 786         VATTR_WANTED(&va, va_fsid);
 787         VATTR_WANTED(&va, va_fileid);
 788         VATTR_WANTED(&va, va_gen);
 789         error = vnode_getattr(vp, &va, vfs_context_current());
 790         if (error) {
 791                 /* XXX: How to handle this case? */
 792                 return;
 793         }
 794
 795 #if CONFIG_MACF
 796         if (*vnode_mac_labelp == NULL && (vp->v_lflag & VL_LABELED) == VL_LABELED) {
 797                 *vnode_mac_labelp = (char *)zalloc(audit_mac_label_zone);
 798                 if (*vnode_mac_labelp != NULL) {
 799                         mac.m_buflen = MAC_AUDIT_LABEL_LEN;
 800                         mac.m_string = *vnode_mac_labelp;
 801                         mac_vnode_label_externalize_audit(vp, &mac);
 802                 }
 803         }
 804 #endif
 805
 806         /*
 807          * XXX do we want to fall back here when these aren't supported?
 808          */
 809         vnp->vn_mode = va.va_mode;
 810         vnp->vn_uid = va.va_uid;
 811         vnp->vn_gid = va.va_gid;
 812         vnp->vn_dev = va.va_rdev;
 813         vnp->vn_fsid = va.va_fsid;
 814         vnp->vn_fileid = (u_int32_t)va.va_fileid;
 815         vnp->vn_gen = va.va_gen;
 816         if (flags & ARG_VNODE1)
 817                 ARG_SET_VALID(ar, ARG_VNODE1);
 818         else
 819                 ARG_SET_VALID(ar, ARG_VNODE2);
 820 }
 821
 822 void
 823 audit_arg_vnpath_withref(struct kaudit_record *ar, struct vnode *vp, u_int64_t flags)
 824 {
 825         if (vp == NULL || vnode_getwithref(vp))
 826                 return;
 827         audit_arg_vnpath(ar, vp, flags);
 828         (void)vnode_put(vp);
 829 }
 830
 831 void
 832 audit_arg_mach_port1(struct kaudit_record *ar, mach_port_name_t port)
 833 {
 834
 835         ar->k_ar.ar_arg_mach_port1 = port;
 836         ARG_SET_VALID(ar, ARG_MACHPORT1);
 837 }
 838
 839 void
 840 audit_arg_mach_port2(struct kaudit_record *ar, mach_port_name_t port)
 841 {
 842
 843         ar->k_ar.ar_arg_mach_port2 = port;
 844         ARG_SET_VALID(ar, ARG_MACHPORT2);
 845 }
 846
 847
 848 /*
 849  * Audit the argument strings passed to exec.
 850  */
 851 void
 852 audit_arg_argv(struct kaudit_record *ar, char *argv, int argc, int length)
 853 {
 854
 855         if (audit_argv == 0 || argc == 0)
 856                 return;
 857
 858         if (ar->k_ar.ar_arg_argv == NULL)
 859                 ar->k_ar.ar_arg_argv = malloc(length, M_AUDITTEXT, M_WAITOK);
 860         bcopy(argv, ar->k_ar.ar_arg_argv, length);
 861         ar->k_ar.ar_arg_argc = argc;
 862         ARG_SET_VALID(ar, ARG_ARGV);
 863 }
 864
 865 /*
 866  * Audit the environment strings passed to exec.
 867  */
 868 void
 869 audit_arg_envv(struct kaudit_record *ar, char *envv, int envc, int length)
 870 {
 871
 872         if (audit_arge == 0 || envc == 0)
 873                 return;
 874
 875         if (ar->k_ar.ar_arg_envv == NULL)
 876                 ar->k_ar.ar_arg_envv = malloc(length, M_AUDITTEXT, M_WAITOK);
 877         bcopy(envv, ar->k_ar.ar_arg_envv, length);
 878         ar->k_ar.ar_arg_envc = envc;
 879         ARG_SET_VALID(ar, ARG_ENVV);
 880 }
 881
 882 /*
 883  * The close() system call uses it's own audit call to capture the path/vnode
 884  * information because those pieces are not easily obtained within the system
 885  * call itself.
 886  */
 887 void
 888 audit_sysclose(struct kaudit_record *ar, proc_t p, int fd)
 889 {
 890         struct fileproc *fp;
 891         struct vnode *vp;
 892
 893         KASSERT(p != NULL, ("audit_sysclose: p == NULL"));
 894
 895         audit_arg_fd(ar, fd);
 896
 897         if (fp_getfvp(p, fd, &fp, &vp) != 0)
 898                 return;
 899
 900         audit_arg_vnpath_withref(ar, (struct vnode *)fp->f_fglob->fg_data,
 901             ARG_VNODE1);
 902         fp_drop(p, fd, fp, 0);
 903 }
 904
 905 #endif /* CONFIG_AUDIT */