audit_arg.c

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    1 /*-
    2  * Copyright (c) 1999-2005 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 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: releng/11.0/sys/security/audit/audit_arg.c 284446 2015-06-16 13:09:18Z mjg $");
   32 
   33 #include <sys/param.h>
   34 #include <sys/filedesc.h>
   35 #include <sys/capsicum.h>
   36 #include <sys/ipc.h>
   37 #include <sys/mount.h>
   38 #include <sys/proc.h>
   39 #include <sys/socket.h>
   40 #include <sys/socketvar.h>
   41 #include <sys/protosw.h>
   42 #include <sys/domain.h>
   43 #include <sys/sbuf.h>
   44 #include <sys/systm.h>
   45 #include <sys/un.h>
   46 #include <sys/vnode.h>
   47 
   48 #include <netinet/in.h>
   49 #include <netinet/in_pcb.h>
   50 
   51 #include <security/audit/audit.h>
   52 #include <security/audit/audit_private.h>
   53 
   54 /*
   55  * Calls to manipulate elements of the audit record structure from system
   56  * call code.  Macro wrappers will prevent this functions from being entered
   57  * if auditing is disabled, avoiding the function call cost.  We check the
   58  * thread audit record pointer anyway, as the audit condition could change,
   59  * and pre-selection may not have allocated an audit record for this event.
   60  *
   61  * XXXAUDIT: Should we assert, in each case, that this field of the record
   62  * hasn't already been filled in?
   63  */
   64 void
   65 audit_arg_addr(void *addr)
   66 {
   67         struct kaudit_record *ar;
   68 
   69         ar = currecord();
   70         if (ar == NULL)
   71                 return;
   72 
   73         ar->k_ar.ar_arg_addr = addr;
   74         ARG_SET_VALID(ar, ARG_ADDR);
   75 }
   76 
   77 void
   78 audit_arg_exit(int status, int retval)
   79 {
   80         struct kaudit_record *ar;
   81 
   82         ar = currecord();
   83         if (ar == NULL)
   84                 return;
   85 
   86         ar->k_ar.ar_arg_exitstatus = status;
   87         ar->k_ar.ar_arg_exitretval = retval;
   88         ARG_SET_VALID(ar, ARG_EXIT);
   89 }
   90 
   91 void
   92 audit_arg_len(int len)
   93 {
   94         struct kaudit_record *ar;
   95 
   96         ar = currecord();
   97         if (ar == NULL)
   98                 return;
   99 
  100         ar->k_ar.ar_arg_len = len;
  101         ARG_SET_VALID(ar, ARG_LEN);
  102 }
  103 
  104 void
  105 audit_arg_atfd1(int atfd)
  106 {
  107         struct kaudit_record *ar;
  108 
  109         ar = currecord();
  110         if (ar == NULL)
  111                 return;
  112 
  113         ar->k_ar.ar_arg_atfd1 = atfd;
  114         ARG_SET_VALID(ar, ARG_ATFD1);
  115 }
  116 
  117 void
  118 audit_arg_atfd2(int atfd)
  119 {
  120         struct kaudit_record *ar;
  121 
  122         ar = currecord();
  123         if (ar == NULL)
  124                 return;
  125 
  126         ar->k_ar.ar_arg_atfd2 = atfd;
  127         ARG_SET_VALID(ar, ARG_ATFD2);
  128 }
  129 
  130 void
  131 audit_arg_fd(int fd)
  132 {
  133         struct kaudit_record *ar;
  134 
  135         ar = currecord();
  136         if (ar == NULL)
  137                 return;
  138 
  139         ar->k_ar.ar_arg_fd = fd;
  140         ARG_SET_VALID(ar, ARG_FD);
  141 }
  142 
  143 void
  144 audit_arg_fflags(int fflags)
  145 {
  146         struct kaudit_record *ar;
  147 
  148         ar = currecord();
  149         if (ar == NULL)
  150                 return;
  151 
  152         ar->k_ar.ar_arg_fflags = fflags;
  153         ARG_SET_VALID(ar, ARG_FFLAGS);
  154 }
  155 
  156 void
  157 audit_arg_gid(gid_t gid)
  158 {
  159         struct kaudit_record *ar;
  160 
  161         ar = currecord();
  162         if (ar == NULL)
  163                 return;
  164 
  165         ar->k_ar.ar_arg_gid = gid;
  166         ARG_SET_VALID(ar, ARG_GID);
  167 }
  168 
  169 void
  170 audit_arg_uid(uid_t uid)
  171 {
  172         struct kaudit_record *ar;
  173 
  174         ar = currecord();
  175         if (ar == NULL)
  176                 return;
  177 
  178         ar->k_ar.ar_arg_uid = uid;
  179         ARG_SET_VALID(ar, ARG_UID);
  180 }
  181 
  182 void
  183 audit_arg_egid(gid_t egid)
  184 {
  185         struct kaudit_record *ar;
  186 
  187         ar = currecord();
  188         if (ar == NULL)
  189                 return;
  190 
  191         ar->k_ar.ar_arg_egid = egid;
  192         ARG_SET_VALID(ar, ARG_EGID);
  193 }
  194 
  195 void
  196 audit_arg_euid(uid_t euid)
  197 {
  198         struct kaudit_record *ar;
  199 
  200         ar = currecord();
  201         if (ar == NULL)
  202                 return;
  203 
  204         ar->k_ar.ar_arg_euid = euid;
  205         ARG_SET_VALID(ar, ARG_EUID);
  206 }
  207 
  208 void
  209 audit_arg_rgid(gid_t rgid)
  210 {
  211         struct kaudit_record *ar;
  212 
  213         ar = currecord();
  214         if (ar == NULL)
  215                 return;
  216 
  217         ar->k_ar.ar_arg_rgid = rgid;
  218         ARG_SET_VALID(ar, ARG_RGID);
  219 }
  220 
  221 void
  222 audit_arg_ruid(uid_t ruid)
  223 {
  224         struct kaudit_record *ar;
  225 
  226         ar = currecord();
  227         if (ar == NULL)
  228                 return;
  229 
  230         ar->k_ar.ar_arg_ruid = ruid;
  231         ARG_SET_VALID(ar, ARG_RUID);
  232 }
  233 
  234 void
  235 audit_arg_sgid(gid_t sgid)
  236 {
  237         struct kaudit_record *ar;
  238 
  239         ar = currecord();
  240         if (ar == NULL)
  241                 return;
  242 
  243         ar->k_ar.ar_arg_sgid = sgid;
  244         ARG_SET_VALID(ar, ARG_SGID);
  245 }
  246 
  247 void
  248 audit_arg_suid(uid_t suid)
  249 {
  250         struct kaudit_record *ar;
  251 
  252         ar = currecord();
  253         if (ar == NULL)
  254                 return;
  255 
  256         ar->k_ar.ar_arg_suid = suid;
  257         ARG_SET_VALID(ar, ARG_SUID);
  258 }
  259 
  260 void
  261 audit_arg_groupset(gid_t *gidset, u_int gidset_size)
  262 {
  263         u_int i;
  264         struct kaudit_record *ar;
  265 
  266         KASSERT(gidset_size <= ngroups_max + 1,
  267             ("audit_arg_groupset: gidset_size > (kern.ngroups + 1)"));
  268 
  269         ar = currecord();
  270         if (ar == NULL)
  271                 return;
  272 
  273         if (ar->k_ar.ar_arg_groups.gidset == NULL)
  274                 ar->k_ar.ar_arg_groups.gidset = malloc(
  275                     sizeof(gid_t) * gidset_size, M_AUDITGIDSET, M_WAITOK);
  276 
  277         for (i = 0; i < gidset_size; i++)
  278                 ar->k_ar.ar_arg_groups.gidset[i] = gidset[i];
  279         ar->k_ar.ar_arg_groups.gidset_size = gidset_size;
  280         ARG_SET_VALID(ar, ARG_GROUPSET);
  281 }
  282 
  283 void
  284 audit_arg_login(char *login)
  285 {
  286         struct kaudit_record *ar;
  287 
  288         ar = currecord();
  289         if (ar == NULL)
  290                 return;
  291 
  292         strlcpy(ar->k_ar.ar_arg_login, login, MAXLOGNAME);
  293         ARG_SET_VALID(ar, ARG_LOGIN);
  294 }
  295 
  296 void
  297 audit_arg_ctlname(int *name, int namelen)
  298 {
  299         struct kaudit_record *ar;
  300 
  301         ar = currecord();
  302         if (ar == NULL)
  303                 return;
  304 
  305         bcopy(name, &ar->k_ar.ar_arg_ctlname, namelen * sizeof(int));
  306         ar->k_ar.ar_arg_len = namelen;
  307         ARG_SET_VALID(ar, ARG_CTLNAME | ARG_LEN);
  308 }
  309 
  310 void
  311 audit_arg_mask(int mask)
  312 {
  313         struct kaudit_record *ar;
  314 
  315         ar = currecord();
  316         if (ar == NULL)
  317                 return;
  318 
  319         ar->k_ar.ar_arg_mask = mask;
  320         ARG_SET_VALID(ar, ARG_MASK);
  321 }
  322 
  323 void
  324 audit_arg_mode(mode_t mode)
  325 {
  326         struct kaudit_record *ar;
  327 
  328         ar = currecord();
  329         if (ar == NULL)
  330                 return;
  331 
  332         ar->k_ar.ar_arg_mode = mode;
  333         ARG_SET_VALID(ar, ARG_MODE);
  334 }
  335 
  336 void
  337 audit_arg_dev(int dev)
  338 {
  339         struct kaudit_record *ar;
  340 
  341         ar = currecord();
  342         if (ar == NULL)
  343                 return;
  344 
  345         ar->k_ar.ar_arg_dev = dev;
  346         ARG_SET_VALID(ar, ARG_DEV);
  347 }
  348 
  349 void
  350 audit_arg_value(long value)
  351 {
  352         struct kaudit_record *ar;
  353 
  354         ar = currecord();
  355         if (ar == NULL)
  356                 return;
  357 
  358         ar->k_ar.ar_arg_value = value;
  359         ARG_SET_VALID(ar, ARG_VALUE);
  360 }
  361 
  362 void
  363 audit_arg_owner(uid_t uid, gid_t gid)
  364 {
  365         struct kaudit_record *ar;
  366 
  367         ar = currecord();
  368         if (ar == NULL)
  369                 return;
  370 
  371         ar->k_ar.ar_arg_uid = uid;
  372         ar->k_ar.ar_arg_gid = gid;
  373         ARG_SET_VALID(ar, ARG_UID | ARG_GID);
  374 }
  375 
  376 void
  377 audit_arg_pid(pid_t pid)
  378 {
  379         struct kaudit_record *ar;
  380 
  381         ar = currecord();
  382         if (ar == NULL)
  383                 return;
  384 
  385         ar->k_ar.ar_arg_pid = pid;
  386         ARG_SET_VALID(ar, ARG_PID);
  387 }
  388 
  389 void
  390 audit_arg_process(struct proc *p)
  391 {
  392         struct kaudit_record *ar;
  393         struct ucred *cred;
  394 
  395         KASSERT(p != NULL, ("audit_arg_process: p == NULL"));
  396 
  397         PROC_LOCK_ASSERT(p, MA_OWNED);
  398 
  399         ar = currecord();
  400         if (ar == NULL)
  401                 return;
  402 
  403         cred = p->p_ucred;
  404         ar->k_ar.ar_arg_auid = cred->cr_audit.ai_auid;
  405         ar->k_ar.ar_arg_euid = cred->cr_uid;
  406         ar->k_ar.ar_arg_egid = cred->cr_groups[0];
  407         ar->k_ar.ar_arg_ruid = cred->cr_ruid;
  408         ar->k_ar.ar_arg_rgid = cred->cr_rgid;
  409         ar->k_ar.ar_arg_asid = cred->cr_audit.ai_asid;
  410         ar->k_ar.ar_arg_termid_addr = cred->cr_audit.ai_termid;
  411         ar->k_ar.ar_arg_pid = p->p_pid;
  412         ARG_SET_VALID(ar, ARG_AUID | ARG_EUID | ARG_EGID | ARG_RUID |
  413             ARG_RGID | ARG_ASID | ARG_TERMID_ADDR | ARG_PID | ARG_PROCESS);
  414 }
  415 
  416 void
  417 audit_arg_signum(u_int signum)
  418 {
  419         struct kaudit_record *ar;
  420 
  421         ar = currecord();
  422         if (ar == NULL)
  423                 return;
  424 
  425         ar->k_ar.ar_arg_signum = signum;
  426         ARG_SET_VALID(ar, ARG_SIGNUM);
  427 }
  428 
  429 void
  430 audit_arg_socket(int sodomain, int sotype, int soprotocol)
  431 {
  432         struct kaudit_record *ar;
  433 
  434         ar = currecord();
  435         if (ar == NULL)
  436                 return;
  437 
  438         ar->k_ar.ar_arg_sockinfo.so_domain = sodomain;
  439         ar->k_ar.ar_arg_sockinfo.so_type = sotype;
  440         ar->k_ar.ar_arg_sockinfo.so_protocol = soprotocol;
  441         ARG_SET_VALID(ar, ARG_SOCKINFO);
  442 }
  443 
  444 void
  445 audit_arg_sockaddr(struct thread *td, int dirfd, struct sockaddr *sa)
  446 {
  447         struct kaudit_record *ar;
  448 
  449         KASSERT(td != NULL, ("audit_arg_sockaddr: td == NULL"));
  450         KASSERT(sa != NULL, ("audit_arg_sockaddr: sa == NULL"));
  451 
  452         ar = currecord();
  453         if (ar == NULL)
  454                 return;
  455 
  456         bcopy(sa, &ar->k_ar.ar_arg_sockaddr, sa->sa_len);
  457         switch (sa->sa_family) {
  458         case AF_INET:
  459                 ARG_SET_VALID(ar, ARG_SADDRINET);
  460                 break;
  461 
  462         case AF_INET6:
  463                 ARG_SET_VALID(ar, ARG_SADDRINET6);
  464                 break;
  465 
  466         case AF_UNIX:
  467                 if (dirfd != AT_FDCWD)
  468                         audit_arg_atfd1(dirfd);
  469                 audit_arg_upath1(td, dirfd,
  470                     ((struct sockaddr_un *)sa)->sun_path);
  471                 ARG_SET_VALID(ar, ARG_SADDRUNIX);
  472                 break;
  473         /* XXXAUDIT: default:? */
  474         }
  475 }
  476 
  477 void
  478 audit_arg_auid(uid_t auid)
  479 {
  480         struct kaudit_record *ar;
  481 
  482         ar = currecord();
  483         if (ar == NULL)
  484                 return;
  485 
  486         ar->k_ar.ar_arg_auid = auid;
  487         ARG_SET_VALID(ar, ARG_AUID);
  488 }
  489 
  490 void
  491 audit_arg_auditinfo(struct auditinfo *au_info)
  492 {
  493         struct kaudit_record *ar;
  494 
  495         ar = currecord();
  496         if (ar == NULL)
  497                 return;
  498 
  499         ar->k_ar.ar_arg_auid = au_info->ai_auid;
  500         ar->k_ar.ar_arg_asid = au_info->ai_asid;
  501         ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success;
  502         ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure;
  503         ar->k_ar.ar_arg_termid.port = au_info->ai_termid.port;
  504         ar->k_ar.ar_arg_termid.machine = au_info->ai_termid.machine;
  505         ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID);
  506 }
  507 
  508 void
  509 audit_arg_auditinfo_addr(struct auditinfo_addr *au_info)
  510 {
  511         struct kaudit_record *ar;
  512 
  513         ar = currecord();
  514         if (ar == NULL)
  515                 return;
  516 
  517         ar->k_ar.ar_arg_auid = au_info->ai_auid;
  518         ar->k_ar.ar_arg_asid = au_info->ai_asid;
  519         ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success;
  520         ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure;
  521         ar->k_ar.ar_arg_termid_addr.at_type = au_info->ai_termid.at_type;
  522         ar->k_ar.ar_arg_termid_addr.at_port = au_info->ai_termid.at_port;
  523         ar->k_ar.ar_arg_termid_addr.at_addr[0] = au_info->ai_termid.at_addr[0];
  524         ar->k_ar.ar_arg_termid_addr.at_addr[1] = au_info->ai_termid.at_addr[1];
  525         ar->k_ar.ar_arg_termid_addr.at_addr[2] = au_info->ai_termid.at_addr[2];
  526         ar->k_ar.ar_arg_termid_addr.at_addr[3] = au_info->ai_termid.at_addr[3];
  527         ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID_ADDR);
  528 }
  529 
  530 void
  531 audit_arg_text(char *text)
  532 {
  533         struct kaudit_record *ar;
  534 
  535         KASSERT(text != NULL, ("audit_arg_text: text == NULL"));
  536 
  537         ar = currecord();
  538         if (ar == NULL)
  539                 return;
  540 
  541         /* Invalidate the text string */
  542         ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_TEXT);
  543 
  544         if (ar->k_ar.ar_arg_text == NULL)
  545                 ar->k_ar.ar_arg_text = malloc(MAXPATHLEN, M_AUDITTEXT,
  546                     M_WAITOK);
  547 
  548         strncpy(ar->k_ar.ar_arg_text, text, MAXPATHLEN);
  549         ARG_SET_VALID(ar, ARG_TEXT);
  550 }
  551 
  552 void
  553 audit_arg_cmd(int cmd)
  554 {
  555         struct kaudit_record *ar;
  556 
  557         ar = currecord();
  558         if (ar == NULL)
  559                 return;
  560 
  561         ar->k_ar.ar_arg_cmd = cmd;
  562         ARG_SET_VALID(ar, ARG_CMD);
  563 }
  564 
  565 void
  566 audit_arg_svipc_cmd(int cmd)
  567 {
  568         struct kaudit_record *ar;
  569 
  570         ar = currecord();
  571         if (ar == NULL)
  572                 return;
  573 
  574         ar->k_ar.ar_arg_svipc_cmd = cmd;
  575         ARG_SET_VALID(ar, ARG_SVIPC_CMD);
  576 }
  577 
  578 void
  579 audit_arg_svipc_perm(struct ipc_perm *perm)
  580 {
  581         struct kaudit_record *ar;
  582 
  583         ar = currecord();
  584         if (ar == NULL)
  585                 return;
  586 
  587         bcopy(perm, &ar->k_ar.ar_arg_svipc_perm,
  588             sizeof(ar->k_ar.ar_arg_svipc_perm));
  589         ARG_SET_VALID(ar, ARG_SVIPC_PERM);
  590 }
  591 
  592 void
  593 audit_arg_svipc_id(int id)
  594 {
  595         struct kaudit_record *ar;
  596 
  597         ar = currecord();
  598         if (ar == NULL)
  599                 return;
  600 
  601         ar->k_ar.ar_arg_svipc_id = id;
  602         ARG_SET_VALID(ar, ARG_SVIPC_ID);
  603 }
  604 
  605 void
  606 audit_arg_svipc_addr(void * addr)
  607 {
  608         struct kaudit_record *ar;
  609 
  610         ar = currecord();
  611         if (ar == NULL)
  612                 return;
  613 
  614         ar->k_ar.ar_arg_svipc_addr = addr;
  615         ARG_SET_VALID(ar, ARG_SVIPC_ADDR);
  616 }
  617 
  618 void
  619 audit_arg_posix_ipc_perm(uid_t uid, gid_t gid, mode_t mode)
  620 {
  621         struct kaudit_record *ar;
  622 
  623         ar = currecord();
  624         if (ar == NULL)
  625                 return;
  626 
  627         ar->k_ar.ar_arg_pipc_perm.pipc_uid = uid;
  628         ar->k_ar.ar_arg_pipc_perm.pipc_gid = gid;
  629         ar->k_ar.ar_arg_pipc_perm.pipc_mode = mode;
  630         ARG_SET_VALID(ar, ARG_POSIX_IPC_PERM);
  631 }
  632 
  633 void
  634 audit_arg_auditon(union auditon_udata *udata)
  635 {
  636         struct kaudit_record *ar;
  637 
  638         ar = currecord();
  639         if (ar == NULL)
  640                 return;
  641 
  642         bcopy((void *)udata, &ar->k_ar.ar_arg_auditon,
  643             sizeof(ar->k_ar.ar_arg_auditon));
  644         ARG_SET_VALID(ar, ARG_AUDITON);
  645 }
  646 
  647 /*
  648  * Audit information about a file, either the file's vnode info, or its
  649  * socket address info.
  650  */
  651 void
  652 audit_arg_file(struct proc *p, struct file *fp)
  653 {
  654         struct kaudit_record *ar;
  655         struct socket *so;
  656         struct inpcb *pcb;
  657         struct vnode *vp;
  658 
  659         ar = currecord();
  660         if (ar == NULL)
  661                 return;
  662 
  663         switch (fp->f_type) {
  664         case DTYPE_VNODE:
  665         case DTYPE_FIFO:
  666                 /*
  667                  * XXXAUDIT: Only possibly to record as first vnode?
  668                  */
  669                 vp = fp->f_vnode;
  670                 vn_lock(vp, LK_SHARED | LK_RETRY);
  671                 audit_arg_vnode1(vp);
  672                 VOP_UNLOCK(vp, 0);
  673                 break;
  674 
  675         case DTYPE_SOCKET:
  676                 so = (struct socket *)fp->f_data;
  677                 if (INP_CHECK_SOCKAF(so, PF_INET)) {
  678                         SOCK_LOCK(so);
  679                         ar->k_ar.ar_arg_sockinfo.so_type =
  680                             so->so_type;
  681                         ar->k_ar.ar_arg_sockinfo.so_domain =
  682                             INP_SOCKAF(so);
  683                         ar->k_ar.ar_arg_sockinfo.so_protocol =
  684                             so->so_proto->pr_protocol;
  685                         SOCK_UNLOCK(so);
  686                         pcb = (struct inpcb *)so->so_pcb;
  687                         INP_RLOCK(pcb);
  688                         ar->k_ar.ar_arg_sockinfo.so_raddr =
  689                             pcb->inp_faddr.s_addr;
  690                         ar->k_ar.ar_arg_sockinfo.so_laddr =
  691                             pcb->inp_laddr.s_addr;
  692                         ar->k_ar.ar_arg_sockinfo.so_rport =
  693                             pcb->inp_fport;
  694                         ar->k_ar.ar_arg_sockinfo.so_lport =
  695                             pcb->inp_lport;
  696                         INP_RUNLOCK(pcb);
  697                         ARG_SET_VALID(ar, ARG_SOCKINFO);
  698                 }
  699                 break;
  700 
  701         default:
  702                 /* XXXAUDIT: else? */
  703                 break;
  704         }
  705 }
  706 
  707 /*
  708  * Store a path as given by the user process for auditing into the audit
  709  * record stored on the user thread.  This function will allocate the memory
  710  * to store the path info if not already available.  This memory will be
  711  * freed when the audit record is freed.
  712  */
  713 static void
  714 audit_arg_upath(struct thread *td, int dirfd, char *upath, char **pathp)
  715 {
  716 
  717         if (*pathp == NULL)
  718                 *pathp = malloc(MAXPATHLEN, M_AUDITPATH, M_WAITOK);
  719         audit_canon_path(td, dirfd, upath, *pathp);
  720 }
  721 
  722 void
  723 audit_arg_upath1(struct thread *td, int dirfd, char *upath)
  724 {
  725         struct kaudit_record *ar;
  726 
  727         ar = currecord();
  728         if (ar == NULL)
  729                 return;
  730 
  731         audit_arg_upath(td, dirfd, upath, &ar->k_ar.ar_arg_upath1);
  732         ARG_SET_VALID(ar, ARG_UPATH1);
  733 }
  734 
  735 void
  736 audit_arg_upath2(struct thread *td, int dirfd, char *upath)
  737 {
  738         struct kaudit_record *ar;
  739 
  740         ar = currecord();
  741         if (ar == NULL)
  742                 return;
  743 
  744         audit_arg_upath(td, dirfd, upath, &ar->k_ar.ar_arg_upath2);
  745         ARG_SET_VALID(ar, ARG_UPATH2);
  746 }
  747 
  748 /*
  749  * Function to save the path and vnode attr information into the audit
  750  * record.
  751  *
  752  * It is assumed that the caller will hold any vnode locks necessary to
  753  * perform a VOP_GETATTR() on the passed vnode.
  754  *
  755  * XXX: The attr code is very similar to vfs_vnops.c:vn_stat(), but always
  756  * provides access to the generation number as we need that to construct the
  757  * BSM file ID.
  758  *
  759  * XXX: We should accept the process argument from the caller, since it's
  760  * very likely they already have a reference.
  761  *
  762  * XXX: Error handling in this function is poor.
  763  *
  764  * XXXAUDIT: Possibly KASSERT the path pointer is NULL?
  765  */
  766 static int
  767 audit_arg_vnode(struct vnode *vp, struct vnode_au_info *vnp)
  768 {
  769         struct vattr vattr;
  770         int error;
  771 
  772         ASSERT_VOP_LOCKED(vp, "audit_arg_vnode");
  773 
  774         error = VOP_GETATTR(vp, &vattr, curthread->td_ucred);
  775         if (error) {
  776                 /* XXX: How to handle this case? */
  777                 return (error);
  778         }
  779 
  780         vnp->vn_mode = vattr.va_mode;
  781         vnp->vn_uid = vattr.va_uid;
  782         vnp->vn_gid = vattr.va_gid;
  783         vnp->vn_dev = vattr.va_rdev;
  784         vnp->vn_fsid = vattr.va_fsid;
  785         vnp->vn_fileid = vattr.va_fileid;
  786         vnp->vn_gen = vattr.va_gen;
  787         return (0);
  788 }
  789 
  790 void
  791 audit_arg_vnode1(struct vnode *vp)
  792 {
  793         struct kaudit_record *ar;
  794         int error;
  795 
  796         ar = currecord();
  797         if (ar == NULL)
  798                 return;
  799 
  800         ARG_CLEAR_VALID(ar, ARG_VNODE1);
  801         error = audit_arg_vnode(vp, &ar->k_ar.ar_arg_vnode1);
  802         if (error == 0)
  803                 ARG_SET_VALID(ar, ARG_VNODE1);
  804 }
  805 
  806 void
  807 audit_arg_vnode2(struct vnode *vp)
  808 {
  809         struct kaudit_record *ar;
  810         int error;
  811 
  812         ar = currecord();
  813         if (ar == NULL)
  814                 return;
  815 
  816         ARG_CLEAR_VALID(ar, ARG_VNODE2);
  817         error = audit_arg_vnode(vp, &ar->k_ar.ar_arg_vnode2);
  818         if (error == 0)
  819                 ARG_SET_VALID(ar, ARG_VNODE2);
  820 }
  821 
  822 /*
  823  * Audit the argument strings passed to exec.
  824  */
  825 void
  826 audit_arg_argv(char *argv, int argc, int length)
  827 {
  828         struct kaudit_record *ar;
  829 
  830         if (audit_argv == 0)
  831                 return;
  832 
  833         ar = currecord();
  834         if (ar == NULL)
  835                 return;
  836 
  837         ar->k_ar.ar_arg_argv = malloc(length, M_AUDITTEXT, M_WAITOK);
  838         bcopy(argv, ar->k_ar.ar_arg_argv, length);
  839         ar->k_ar.ar_arg_argc = argc;
  840         ARG_SET_VALID(ar, ARG_ARGV);
  841 }
  842 
  843 /*
  844  * Audit the environment strings passed to exec.
  845  */
  846 void
  847 audit_arg_envv(char *envv, int envc, int length)
  848 {
  849         struct kaudit_record *ar;
  850 
  851         if (audit_arge == 0)
  852                 return;
  853 
  854         ar = currecord();
  855         if (ar == NULL)
  856                 return;
  857 
  858         ar->k_ar.ar_arg_envv = malloc(length, M_AUDITTEXT, M_WAITOK);
  859         bcopy(envv, ar->k_ar.ar_arg_envv, length);
  860         ar->k_ar.ar_arg_envc = envc;
  861         ARG_SET_VALID(ar, ARG_ENVV);
  862 }
  863 
  864 void
  865 audit_arg_rights(cap_rights_t *rightsp)
  866 {
  867         struct kaudit_record *ar;
  868 
  869         ar = currecord();
  870         if (ar == NULL)
  871                 return;
  872 
  873         ar->k_ar.ar_arg_rights = *rightsp;
  874         ARG_SET_VALID(ar, ARG_RIGHTS);
  875 }
  876 
  877 void
  878 audit_arg_fcntl_rights(uint32_t fcntlrights)
  879 {
  880         struct kaudit_record *ar;
  881 
  882         ar = currecord();
  883         if (ar == NULL)
  884                 return;
  885 
  886         ar->k_ar.ar_arg_fcntl_rights = fcntlrights;
  887         ARG_SET_VALID(ar, ARG_FCNTL_RIGHTS);
  888 }
  889 
  890 /*
  891  * The close() system call uses it's own audit call to capture the path/vnode
  892  * information because those pieces are not easily obtained within the system
  893  * call itself.
  894  */
  895 void
  896 audit_sysclose(struct thread *td, int fd)
  897 {
  898         cap_rights_t rights;
  899         struct kaudit_record *ar;
  900         struct vnode *vp;
  901         struct file *fp;
  902 
  903         KASSERT(td != NULL, ("audit_sysclose: td == NULL"));
  904 
  905         ar = currecord();
  906         if (ar == NULL)
  907                 return;
  908 
  909         audit_arg_fd(fd);
  910 
  911         if (getvnode(td, fd, cap_rights_init(&rights), &fp) != 0)
  912                 return;
  913 
  914         vp = fp->f_vnode;
  915         vn_lock(vp, LK_SHARED | LK_RETRY);
  916         audit_arg_vnode1(vp);
  917         VOP_UNLOCK(vp, 0);
  918         fdrop(fp, td);
  919 }
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FreeBSD/Linux Kernel Cross Reference sys/security/audit/audit_arg.c

FreeBSD/Linux Kernel Cross Reference
sys/security/audit/audit_arg.c
