/* $NetBSD: secmodel_suser.c,v 1.50 2019/04/10 18:49:04 maxv Exp $ */
/*-
* Copyright (c) 2006 Elad Efrat <elad@NetBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This file contains kauth(9) listeners needed to implement the traditional
* NetBSD superuser access restrictions.
*
* There are two main resources a request can be issued to: user-owned and
* system owned. For the first, traditional Unix access checks are done, as
* well as superuser checks. If needed, the request context is examined before
* a decision is made. For the latter, usually only superuser checks are done
* as normal users are not allowed to access system resources.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: secmodel_suser.c,v 1.50 2019/04/10 18:49:04 maxv Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/kauth.h>
#include <sys/mutex.h>
#include <sys/mount.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/vnode.h>
#include <sys/proc.h>
#include <sys/module.h>
#include <secmodel/secmodel.h>
#include <secmodel/suser/suser.h>
MODULE(MODULE_CLASS_SECMODEL, suser, NULL);
static kauth_listener_t l_generic, l_system, l_process, l_network, l_machdep,
l_device, l_vnode;
static secmodel_t suser_sm;
static struct sysctllog *suser_sysctl_log;
void
sysctl_security_suser_setup(struct sysctllog **clog)
{
const struct sysctlnode *rnode;
sysctl_createv(clog, 0, NULL, &rnode,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "models", NULL,
NULL, 0, NULL, 0,
CTL_SECURITY, CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, &rnode, &rnode,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "suser", NULL,
NULL, 0, NULL, 0,
CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, &rnode, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRING, "name", NULL,
NULL, 0, __UNCONST(SECMODEL_SUSER_NAME), 0,
CTL_CREATE, CTL_EOL);
}
void
secmodel_suser_init(void)
{
}
void
secmodel_suser_start(void)
{
l_generic = kauth_listen_scope(KAUTH_SCOPE_GENERIC,
secmodel_suser_generic_cb, NULL);
l_system = kauth_listen_scope(KAUTH_SCOPE_SYSTEM,
secmodel_suser_system_cb, NULL);
l_process = kauth_listen_scope(KAUTH_SCOPE_PROCESS,
secmodel_suser_process_cb, NULL);
l_network = kauth_listen_scope(KAUTH_SCOPE_NETWORK,
secmodel_suser_network_cb, NULL);
l_machdep = kauth_listen_scope(KAUTH_SCOPE_MACHDEP,
secmodel_suser_machdep_cb, NULL);
l_device = kauth_listen_scope(KAUTH_SCOPE_DEVICE,
secmodel_suser_device_cb, NULL);
l_vnode = kauth_listen_scope(KAUTH_SCOPE_VNODE,
secmodel_suser_vnode_cb, NULL);
}
void
secmodel_suser_stop(void)
{
kauth_unlisten_scope(l_generic);
kauth_unlisten_scope(l_system);
kauth_unlisten_scope(l_process);
kauth_unlisten_scope(l_network);
kauth_unlisten_scope(l_machdep);
kauth_unlisten_scope(l_device);
kauth_unlisten_scope(l_vnode);
}
static bool
suser_isroot(kauth_cred_t cred)
{
return kauth_cred_geteuid(cred) == 0;
}
static int
suser_eval(const char *what, void *arg, void *ret)
{
int error = 0;
if (strcasecmp(what, "is-root") == 0) {
kauth_cred_t cred = arg;
bool *bp = ret;
*bp = suser_isroot(cred);
} else {
error = ENOENT;
}
return error;
}
static int
suser_modcmd(modcmd_t cmd, void *arg)
{
int error = 0;
switch (cmd) {
case MODULE_CMD_INIT:
error = secmodel_register(&suser_sm,
SECMODEL_SUSER_ID, SECMODEL_SUSER_NAME,
NULL, suser_eval, NULL);
if (error != 0)
printf("suser_modcmd::init: secmodel_register "
"returned %d\n", error);
secmodel_suser_init();
secmodel_suser_start();
sysctl_security_suser_setup(&suser_sysctl_log);
break;
case MODULE_CMD_FINI:
sysctl_teardown(&suser_sysctl_log);
secmodel_suser_stop();
error = secmodel_deregister(suser_sm);
if (error != 0)
printf("suser_modcmd::fini: secmodel_deregister "
"returned %d\n", error);
break;
case MODULE_CMD_AUTOUNLOAD:
error = EPERM;
break;
default:
error = ENOTTY;
break;
}
return (error);
}
/*
* kauth(9) listener
*
* Security model: Traditional NetBSD
* Scope: Generic
* Responsibility: Superuser access
*/
int
secmodel_suser_generic_cb(kauth_cred_t cred, kauth_action_t action,
void *cookie, void *arg0, void *arg1, void *arg2, void *arg3)
{
bool isroot;
int result;
isroot = suser_isroot(cred);
result = KAUTH_RESULT_DEFER;
switch (action) {
case KAUTH_GENERIC_ISSUSER:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
return (result);
}
/*
* kauth(9) listener
*
* Security model: Traditional NetBSD
* Scope: System
* Responsibility: Superuser access
*/
int
secmodel_suser_system_cb(kauth_cred_t cred, kauth_action_t action,
void *cookie, void *arg0, void *arg1, void *arg2, void *arg3)
{
bool isroot;
int result;
enum kauth_system_req req;
isroot = suser_isroot(cred);
result = KAUTH_RESULT_DEFER;
req = (enum kauth_system_req)arg0;
switch (action) {
case KAUTH_SYSTEM_CPU:
switch (req) {
case KAUTH_REQ_SYSTEM_CPU_SETSTATE:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_SYSTEM_DEVMAPPER:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
case KAUTH_SYSTEM_FS_QUOTA:
switch (req) {
case KAUTH_REQ_SYSTEM_FS_QUOTA_GET:
case KAUTH_REQ_SYSTEM_FS_QUOTA_ONOFF:
case KAUTH_REQ_SYSTEM_FS_QUOTA_MANAGE:
case KAUTH_REQ_SYSTEM_FS_QUOTA_NOLIMIT:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_SYSTEM_SYSVIPC:
switch (req) {
case KAUTH_REQ_SYSTEM_SYSVIPC_BYPASS:
case KAUTH_REQ_SYSTEM_SYSVIPC_SHM_LOCK:
case KAUTH_REQ_SYSTEM_SYSVIPC_SHM_UNLOCK:
case KAUTH_REQ_SYSTEM_SYSVIPC_MSGQ_OVERSIZE:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_SYSTEM_MOUNT:
switch (req) {
case KAUTH_REQ_SYSTEM_MOUNT_DEVICE:
case KAUTH_REQ_SYSTEM_MOUNT_GET:
case KAUTH_REQ_SYSTEM_MOUNT_NEW:
case KAUTH_REQ_SYSTEM_MOUNT_UNMOUNT:
case KAUTH_REQ_SYSTEM_MOUNT_UPDATE:
case KAUTH_REQ_SYSTEM_MOUNT_UMAP:
if (isroot) {
result = KAUTH_RESULT_ALLOW;
break;
}
break;
default:
break;
}
break;
case KAUTH_SYSTEM_MQUEUE:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
case KAUTH_SYSTEM_PSET:
switch (req) {
case KAUTH_REQ_SYSTEM_PSET_ASSIGN:
case KAUTH_REQ_SYSTEM_PSET_BIND:
case KAUTH_REQ_SYSTEM_PSET_CREATE:
case KAUTH_REQ_SYSTEM_PSET_DESTROY:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_SYSTEM_TIME:
switch (req) {
case KAUTH_REQ_SYSTEM_TIME_ADJTIME:
case KAUTH_REQ_SYSTEM_TIME_NTPADJTIME:
case KAUTH_REQ_SYSTEM_TIME_TIMECOUNTERS:
case KAUTH_REQ_SYSTEM_TIME_SYSTEM:
case KAUTH_REQ_SYSTEM_TIME_RTCOFFSET:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_SYSTEM_SEMAPHORE:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
case KAUTH_SYSTEM_SYSCTL:
switch (req) {
case KAUTH_REQ_SYSTEM_SYSCTL_ADD:
case KAUTH_REQ_SYSTEM_SYSCTL_DELETE:
case KAUTH_REQ_SYSTEM_SYSCTL_DESC:
case KAUTH_REQ_SYSTEM_SYSCTL_MODIFY:
case KAUTH_REQ_SYSTEM_SYSCTL_PRVT:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_SYSTEM_SWAPCTL:
case KAUTH_SYSTEM_ACCOUNTING:
case KAUTH_SYSTEM_REBOOT:
case KAUTH_SYSTEM_CHROOT:
case KAUTH_SYSTEM_FILEHANDLE:
case KAUTH_SYSTEM_MKNOD:
case KAUTH_SYSTEM_SETIDCORE:
case KAUTH_SYSTEM_MODULE:
case KAUTH_SYSTEM_FS_RESERVEDSPACE:
case KAUTH_SYSTEM_MAP_VA_ZERO:
case KAUTH_SYSTEM_FS_EXTATTR:
case KAUTH_SYSTEM_FS_SNAPSHOT:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
case KAUTH_SYSTEM_DEBUG:
break;
case KAUTH_SYSTEM_CHSYSFLAGS:
/* Deprecated. */
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
case KAUTH_SYSTEM_VERIEXEC:
switch (req) {
case KAUTH_REQ_SYSTEM_VERIEXEC_ACCESS:
case KAUTH_REQ_SYSTEM_VERIEXEC_MODIFY:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_SYSTEM_LFS:
switch (req) {
case KAUTH_REQ_SYSTEM_LFS_MARKV:
case KAUTH_REQ_SYSTEM_LFS_BMAPV:
case KAUTH_REQ_SYSTEM_LFS_SEGCLEAN:
case KAUTH_REQ_SYSTEM_LFS_SEGWAIT:
case KAUTH_REQ_SYSTEM_LFS_FCNTL:
if (isroot)
result = KAUTH_RESULT_ALLOW;
default:
break;
}
break;
case KAUTH_SYSTEM_INTR:
switch (req) {
case KAUTH_REQ_SYSTEM_INTR_AFFINITY:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_SYSTEM_KERNADDR:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
return (result);
}
/*
* kauth(9) listener
*
* Security model: Traditional NetBSD
* Scope: Process
* Responsibility: Superuser access
*/
int
secmodel_suser_process_cb(kauth_cred_t cred, kauth_action_t action,
void *cookie, void *arg0, void *arg1, void *arg2, void *arg3)
{
bool isroot;
int result;
isroot = suser_isroot(cred);
result = KAUTH_RESULT_DEFER;
switch (action) {
case KAUTH_PROCESS_SIGNAL:
case KAUTH_PROCESS_KTRACE:
case KAUTH_PROCESS_PROCFS:
case KAUTH_PROCESS_PTRACE:
case KAUTH_PROCESS_SCHEDULER_GETPARAM:
case KAUTH_PROCESS_SCHEDULER_SETPARAM:
case KAUTH_PROCESS_SCHEDULER_GETAFFINITY:
case KAUTH_PROCESS_SCHEDULER_SETAFFINITY:
case KAUTH_PROCESS_SETID:
case KAUTH_PROCESS_KEVENT_FILTER:
case KAUTH_PROCESS_NICE:
case KAUTH_PROCESS_FORK:
case KAUTH_PROCESS_CORENAME:
case KAUTH_PROCESS_STOPFLAG:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
case KAUTH_PROCESS_CANSEE: {
unsigned long req;
req = (unsigned long)arg1;
switch (req) {
case KAUTH_REQ_PROCESS_CANSEE_ARGS:
case KAUTH_REQ_PROCESS_CANSEE_ENTRY:
case KAUTH_REQ_PROCESS_CANSEE_OPENFILES:
case KAUTH_REQ_PROCESS_CANSEE_EPROC:
case KAUTH_REQ_PROCESS_CANSEE_KPTR:
if (isroot) {
result = KAUTH_RESULT_ALLOW;
break;
}
break;
case KAUTH_REQ_PROCESS_CANSEE_ENV:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
}
case KAUTH_PROCESS_RLIMIT: {
enum kauth_process_req req;
req = (enum kauth_process_req)(unsigned long)arg1;
switch (req) {
case KAUTH_REQ_PROCESS_RLIMIT_SET:
case KAUTH_REQ_PROCESS_RLIMIT_GET:
case KAUTH_REQ_PROCESS_RLIMIT_BYPASS:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
}
default:
break;
}
return (result);
}
/*
* kauth(9) listener
*
* Security model: Traditional NetBSD
* Scope: Network
* Responsibility: Superuser access
*/
int
secmodel_suser_network_cb(kauth_cred_t cred, kauth_action_t action,
void *cookie, void *arg0, void *arg1, void *arg2, void *arg3)
{
bool isroot;
int result;
enum kauth_network_req req;
isroot = suser_isroot(cred);
result = KAUTH_RESULT_DEFER;
req = (enum kauth_network_req)arg0;
switch (action) {
case KAUTH_NETWORK_ALTQ:
switch (req) {
case KAUTH_REQ_NETWORK_ALTQ_AFMAP:
case KAUTH_REQ_NETWORK_ALTQ_BLUE:
case KAUTH_REQ_NETWORK_ALTQ_CBQ:
case KAUTH_REQ_NETWORK_ALTQ_CDNR:
case KAUTH_REQ_NETWORK_ALTQ_CONF:
case KAUTH_REQ_NETWORK_ALTQ_FIFOQ:
case KAUTH_REQ_NETWORK_ALTQ_HFSC:
case KAUTH_REQ_NETWORK_ALTQ_JOBS:
case KAUTH_REQ_NETWORK_ALTQ_PRIQ:
case KAUTH_REQ_NETWORK_ALTQ_RED:
case KAUTH_REQ_NETWORK_ALTQ_RIO:
case KAUTH_REQ_NETWORK_ALTQ_WFQ:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_BIND:
switch (req) {
case KAUTH_REQ_NETWORK_BIND_PORT:
case KAUTH_REQ_NETWORK_BIND_PRIVPORT:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_FIREWALL:
switch (req) {
case KAUTH_REQ_NETWORK_FIREWALL_FW:
case KAUTH_REQ_NETWORK_FIREWALL_NAT:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_FORWSRCRT:
case KAUTH_NETWORK_ROUTE:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
case KAUTH_NETWORK_INTERFACE:
switch (req) {
case KAUTH_REQ_NETWORK_INTERFACE_GET:
case KAUTH_REQ_NETWORK_INTERFACE_SET:
case KAUTH_REQ_NETWORK_INTERFACE_GETPRIV:
case KAUTH_REQ_NETWORK_INTERFACE_SETPRIV:
case KAUTH_REQ_NETWORK_INTERFACE_FIRMWARE:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_INTERFACE_BRIDGE:
switch (req) {
case KAUTH_REQ_NETWORK_INTERFACE_BRIDGE_GETPRIV:
case KAUTH_REQ_NETWORK_INTERFACE_BRIDGE_SETPRIV:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_INTERFACE_PPP:
switch (req) {
case KAUTH_REQ_NETWORK_INTERFACE_PPP_ADD:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_INTERFACE_PVC:
switch (req) {
case KAUTH_REQ_NETWORK_INTERFACE_PVC_ADD:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_INTERFACE_SLIP:
switch (req) {
case KAUTH_REQ_NETWORK_INTERFACE_SLIP_ADD:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_INTERFACE_STRIP:
switch (req) {
case KAUTH_REQ_NETWORK_INTERFACE_STRIP_ADD:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_INTERFACE_TUN:
switch (req) {
case KAUTH_REQ_NETWORK_INTERFACE_TUN_ADD:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_IPV6:
switch (req) {
case KAUTH_REQ_NETWORK_IPV6_HOPBYHOP:
case KAUTH_REQ_NETWORK_IPV6_JOIN_MULTICAST:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_NFS:
switch (req) {
case KAUTH_REQ_NETWORK_NFS_EXPORT:
case KAUTH_REQ_NETWORK_NFS_SVC:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_SMB:
switch (req) {
case KAUTH_REQ_NETWORK_SMB_SHARE_ACCESS:
case KAUTH_REQ_NETWORK_SMB_SHARE_CREATE:
case KAUTH_REQ_NETWORK_SMB_VC_ACCESS:
case KAUTH_REQ_NETWORK_SMB_VC_CREATE:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
case KAUTH_NETWORK_SOCKET:
switch (req) {
case KAUTH_REQ_NETWORK_SOCKET_DROP:
case KAUTH_REQ_NETWORK_SOCKET_OPEN:
case KAUTH_REQ_NETWORK_SOCKET_RAWSOCK:
case KAUTH_REQ_NETWORK_SOCKET_SETPRIV:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
case KAUTH_REQ_NETWORK_SOCKET_CANSEE:
if (isroot) {
result = KAUTH_RESULT_ALLOW;
break;
}
break;
default:
break;
}
break;
case KAUTH_NETWORK_IPSEC:
switch (req) {
case KAUTH_REQ_NETWORK_IPSEC_BYPASS:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
default:
break;
}
return (result);
}
/*
* kauth(9) listener
*
* Security model: Traditional NetBSD
* Scope: Machdep
* Responsibility: Superuser access
*/
int
secmodel_suser_machdep_cb(kauth_cred_t cred, kauth_action_t action,
void *cookie, void *arg0, void *arg1, void *arg2, void *arg3)
{
bool isroot;
int result;
isroot = suser_isroot(cred);
result = KAUTH_RESULT_DEFER;
switch (action) {
case KAUTH_MACHDEP_CPU_UCODE_APPLY:
case KAUTH_MACHDEP_IOPERM_GET:
case KAUTH_MACHDEP_LDT_GET:
case KAUTH_MACHDEP_LDT_SET:
case KAUTH_MACHDEP_MTRR_GET:
case KAUTH_MACHDEP_CACHEFLUSH:
case KAUTH_MACHDEP_IOPERM_SET:
case KAUTH_MACHDEP_IOPL:
case KAUTH_MACHDEP_MTRR_SET:
case KAUTH_MACHDEP_NVRAM:
case KAUTH_MACHDEP_UNMANAGEDMEM:
case KAUTH_MACHDEP_PXG:
case KAUTH_MACHDEP_SVS_DISABLE:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
return (result);
}
/*
* kauth(9) listener
*
* Security model: Traditional NetBSD
* Scope: Device
* Responsibility: Superuser access
*/
int
secmodel_suser_device_cb(kauth_cred_t cred, kauth_action_t action,
void *cookie, void *arg0, void *arg1, void *arg2, void *arg3)
{
bool isroot;
int result;
isroot = suser_isroot(cred);
result = KAUTH_RESULT_DEFER;
switch (action) {
case KAUTH_DEVICE_BLUETOOTH_SETPRIV:
case KAUTH_DEVICE_BLUETOOTH_SEND:
case KAUTH_DEVICE_BLUETOOTH_RECV:
case KAUTH_DEVICE_TTY_OPEN:
case KAUTH_DEVICE_TTY_PRIVSET:
case KAUTH_DEVICE_TTY_STI:
case KAUTH_DEVICE_TTY_VIRTUAL:
case KAUTH_DEVICE_RND_ADDDATA:
case KAUTH_DEVICE_RND_ADDDATA_ESTIMATE:
case KAUTH_DEVICE_RND_GETPRIV:
case KAUTH_DEVICE_RND_SETPRIV:
case KAUTH_DEVICE_WSCONS_KEYBOARD_BELL:
case KAUTH_DEVICE_WSCONS_KEYBOARD_KEYREPEAT:
case KAUTH_DEVICE_NVMM_CTL:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
case KAUTH_DEVICE_BLUETOOTH_BCSP:
case KAUTH_DEVICE_BLUETOOTH_BTUART: {
enum kauth_device_req req;
req = (enum kauth_device_req)arg0;
switch (req) {
case KAUTH_REQ_DEVICE_BLUETOOTH_BCSP_ADD:
case KAUTH_REQ_DEVICE_BLUETOOTH_BTUART_ADD:
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
break;
}
case KAUTH_DEVICE_GPIO_PINSET:
/*
* root can access gpio pins, secmodel_securlevel can veto
* this decision.
*/
if (isroot)
result = KAUTH_RESULT_ALLOW;
break;
default:
break;
}
return (result);
}
int
secmodel_suser_vnode_cb(kauth_cred_t cred, kauth_action_t action,
void *cookie, void *arg0, void *arg1, void *arg2, void *arg3)
{
bool isroot;
int result;
isroot = suser_isroot(cred);
result = KAUTH_RESULT_DEFER;
if (isroot) {
/* Superuser can execute only if the file's executable. */
if ((action & KAUTH_VNODE_EXECUTE) == 0 ||
(action & KAUTH_VNODE_IS_EXEC))
result = KAUTH_RESULT_ALLOW;
}
return (result);
}