5d1a327bfd
structure definition, rather than using an operation vector
we translate into the structure. Originally, we used a vector
for two reasons:
(1) We wanted to define the structure sparsely, which wasn't
supported by the C compiler for structures. For a policy
with five entry points, you don't want to have to stick in
a few hundred NULL function pointers.
(2) We thought it would improve ABI compatibility allowing modules
to work with kernels that had a superset of the entry points
defined in the module, even if the kernel had changed its
entry point set.
Both of these no longer apply:
(1) C99 gives us a way to sparsely define a static structure.
(2) The ABI problems existed anyway, due to enumeration numbers,
argument changes, and semantic mismatches. Since the going
rule for FreeBSD is that you really need your modules to
pretty closely match your kernel, it's not worth the
complexity.
This submit eliminates the operation vector, dynamic allocation
of the operation structure, copying of the vector to the
structure, and redoes the vectors in each policy to direct
structure definitions. One enourmous benefit of this change
is that we now get decent type checking on policy entry point
implementation arguments.
Obtained from: TrustedBSD Project
Sponsored by: DARPA, Network Associates Laboratories
3450 lines
74 KiB
C
3450 lines
74 KiB
C
/*-
|
|
* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
|
|
* Copyright (c) 2001 Ilmar S. Habibulin
|
|
* Copyright (c) 2001, 2002 Networks Associates Technology, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by Robert Watson and Ilmar Habibulin for the
|
|
* TrustedBSD Project.
|
|
*
|
|
* This software was developed for the FreeBSD Project in part by NAI Labs,
|
|
* the Security Research Division of Network Associates, Inc. under
|
|
* DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
|
|
* CHATS research program.
|
|
*
|
|
* 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 names of the authors 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
/*
|
|
* Developed by the TrustedBSD Project.
|
|
*
|
|
* Framework for extensible kernel access control. Kernel and userland
|
|
* interface to the framework, policy registration and composition.
|
|
*/
|
|
|
|
#include "opt_mac.h"
|
|
#include "opt_devfs.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/extattr.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/mac.h>
|
|
#include <sys/module.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/file.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/pipe.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/pmap.h>
|
|
#include <vm/vm_map.h>
|
|
#include <vm/vm_object.h>
|
|
|
|
#include <sys/mac_policy.h>
|
|
|
|
#include <fs/devfs/devfs.h>
|
|
|
|
#include <net/bpfdesc.h>
|
|
#include <net/if.h>
|
|
#include <net/if_var.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/ip_var.h>
|
|
|
|
#ifdef MAC
|
|
|
|
/*
|
|
* Declare that the kernel provides MAC support, version 1. This permits
|
|
* modules to refuse to be loaded if the necessary support isn't present,
|
|
* even if it's pre-boot.
|
|
*/
|
|
MODULE_VERSION(kernel_mac_support, 1);
|
|
|
|
SYSCTL_DECL(_security);
|
|
|
|
SYSCTL_NODE(_security, OID_AUTO, mac, CTLFLAG_RW, 0,
|
|
"TrustedBSD MAC policy controls");
|
|
|
|
#if MAC_MAX_POLICIES > 32
|
|
#error "MAC_MAX_POLICIES too large"
|
|
#endif
|
|
|
|
static unsigned int mac_max_policies = MAC_MAX_POLICIES;
|
|
static unsigned int mac_policy_offsets_free = (1 << MAC_MAX_POLICIES) - 1;
|
|
SYSCTL_UINT(_security_mac, OID_AUTO, max_policies, CTLFLAG_RD,
|
|
&mac_max_policies, 0, "");
|
|
|
|
/*
|
|
* Has the kernel started generating labeled objects yet? All read/write
|
|
* access to this variable is serialized during the boot process. Following
|
|
* the end of serialization, we don't update this flag; no locking.
|
|
*/
|
|
static int mac_late = 0;
|
|
|
|
/*
|
|
* Warn about EA transactions only the first time they happen.
|
|
* Weak coherency, no locking.
|
|
*/
|
|
static int ea_warn_once = 0;
|
|
|
|
static int mac_enforce_fs = 1;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, enforce_fs, CTLFLAG_RW,
|
|
&mac_enforce_fs, 0, "Enforce MAC policy on file system objects");
|
|
TUNABLE_INT("security.mac.enforce_fs", &mac_enforce_fs);
|
|
|
|
static int mac_enforce_network = 1;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, enforce_network, CTLFLAG_RW,
|
|
&mac_enforce_network, 0, "Enforce MAC policy on network packets");
|
|
TUNABLE_INT("security.mac.enforce_network", &mac_enforce_network);
|
|
|
|
static int mac_enforce_pipe = 1;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, enforce_pipe, CTLFLAG_RW,
|
|
&mac_enforce_pipe, 0, "Enforce MAC policy on pipe operations");
|
|
TUNABLE_INT("security.mac.enforce_pipe", &mac_enforce_pipe);
|
|
|
|
static int mac_enforce_process = 1;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, enforce_process, CTLFLAG_RW,
|
|
&mac_enforce_process, 0, "Enforce MAC policy on inter-process operations");
|
|
TUNABLE_INT("security.mac.enforce_process", &mac_enforce_process);
|
|
|
|
static int mac_enforce_socket = 1;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, enforce_socket, CTLFLAG_RW,
|
|
&mac_enforce_socket, 0, "Enforce MAC policy on socket operations");
|
|
TUNABLE_INT("security.mac.enforce_socket", &mac_enforce_socket);
|
|
|
|
static int mac_enforce_system = 1;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, enforce_system, CTLFLAG_RW,
|
|
&mac_enforce_system, 0, "Enforce MAC policy on system operations");
|
|
TUNABLE_INT("security.mac.enforce_system", &mac_enforce_system);
|
|
|
|
static int mac_enforce_vm = 1;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, enforce_vm, CTLFLAG_RW,
|
|
&mac_enforce_vm, 0, "Enforce MAC policy on vm operations");
|
|
TUNABLE_INT("security.mac.enforce_vm", &mac_enforce_vm);
|
|
|
|
static int mac_cache_fslabel_in_vnode = 1;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, cache_fslabel_in_vnode, CTLFLAG_RW,
|
|
&mac_cache_fslabel_in_vnode, 0, "Cache mount fslabel in vnode");
|
|
TUNABLE_INT("security.mac.cache_fslabel_in_vnode",
|
|
&mac_cache_fslabel_in_vnode);
|
|
|
|
static int mac_mmap_revocation = 1;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, mmap_revocation, CTLFLAG_RW,
|
|
&mac_mmap_revocation, 0, "Revoke mmap access to files on subject "
|
|
"relabel");
|
|
static int mac_mmap_revocation_via_cow = 0;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, mmap_revocation_via_cow, CTLFLAG_RW,
|
|
&mac_mmap_revocation_via_cow, 0, "Revoke mmap access to files via "
|
|
"copy-on-write semantics, or by removing all write access");
|
|
|
|
#ifdef MAC_DEBUG
|
|
SYSCTL_NODE(_security_mac, OID_AUTO, debug, CTLFLAG_RW, 0,
|
|
"TrustedBSD MAC debug info");
|
|
|
|
static int mac_debug_label_fallback = 0;
|
|
SYSCTL_INT(_security_mac_debug, OID_AUTO, label_fallback, CTLFLAG_RW,
|
|
&mac_debug_label_fallback, 0, "Filesystems should fall back to fs label"
|
|
"when label is corrupted.");
|
|
TUNABLE_INT("security.mac.debug_label_fallback",
|
|
&mac_debug_label_fallback);
|
|
|
|
SYSCTL_NODE(_security_mac_debug, OID_AUTO, counters, CTLFLAG_RW, 0,
|
|
"TrustedBSD MAC object counters");
|
|
|
|
static unsigned int nmacmbufs, nmaccreds, nmacifnets, nmacbpfdescs,
|
|
nmacsockets, nmacmounts, nmactemp, nmacvnodes, nmacdevfsdirents,
|
|
nmacipqs, nmacpipes;
|
|
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, mbufs, CTLFLAG_RD,
|
|
&nmacmbufs, 0, "number of mbufs in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, creds, CTLFLAG_RD,
|
|
&nmaccreds, 0, "number of ucreds in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, ifnets, CTLFLAG_RD,
|
|
&nmacifnets, 0, "number of ifnets in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, ipqs, CTLFLAG_RD,
|
|
&nmacipqs, 0, "number of ipqs in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, bpfdescs, CTLFLAG_RD,
|
|
&nmacbpfdescs, 0, "number of bpfdescs in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, sockets, CTLFLAG_RD,
|
|
&nmacsockets, 0, "number of sockets in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, pipes, CTLFLAG_RD,
|
|
&nmacpipes, 0, "number of pipes in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, mounts, CTLFLAG_RD,
|
|
&nmacmounts, 0, "number of mounts in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, temp, CTLFLAG_RD,
|
|
&nmactemp, 0, "number of temporary labels in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, vnodes, CTLFLAG_RD,
|
|
&nmacvnodes, 0, "number of vnodes in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, devfsdirents, CTLFLAG_RD,
|
|
&nmacdevfsdirents, 0, "number of devfs dirents inuse");
|
|
#endif
|
|
|
|
static int error_select(int error1, int error2);
|
|
static int mac_policy_register(struct mac_policy_conf *mpc);
|
|
static int mac_policy_unregister(struct mac_policy_conf *mpc);
|
|
|
|
static void mac_check_vnode_mmap_downgrade(struct ucred *cred,
|
|
struct vnode *vp, int *prot);
|
|
static void mac_cred_mmapped_drop_perms_recurse(struct thread *td,
|
|
struct ucred *cred, struct vm_map *map);
|
|
|
|
static void mac_destroy_socket_label(struct label *label);
|
|
|
|
static int mac_setlabel_vnode_extattr(struct ucred *cred,
|
|
struct vnode *vp, struct label *intlabel);
|
|
|
|
|
|
MALLOC_DEFINE(M_MACOPVEC, "macopvec", "MAC policy operation vector");
|
|
MALLOC_DEFINE(M_MACPIPELABEL, "macpipelabel", "MAC labels for pipes");
|
|
MALLOC_DEFINE(M_MACTEMP, "mactemp", "MAC temporary label storage");
|
|
|
|
/*
|
|
* mac_policy_list_lock protects the consistency of 'mac_policy_list',
|
|
* the linked list of attached policy modules. Read-only consumers of
|
|
* the list must acquire a shared lock for the duration of their use;
|
|
* writers must acquire an exclusive lock. Note that for compound
|
|
* operations, locks should be held for the entire compound operation,
|
|
* and that this is not yet done for relabel requests.
|
|
*/
|
|
static struct mtx mac_policy_list_lock;
|
|
static LIST_HEAD(, mac_policy_conf) mac_policy_list;
|
|
static int mac_policy_list_busy;
|
|
#define MAC_POLICY_LIST_LOCKINIT() mtx_init(&mac_policy_list_lock, \
|
|
"mac_policy_list_lock", NULL, MTX_DEF);
|
|
#define MAC_POLICY_LIST_LOCK() mtx_lock(&mac_policy_list_lock);
|
|
#define MAC_POLICY_LIST_UNLOCK() mtx_unlock(&mac_policy_list_lock);
|
|
|
|
#define MAC_POLICY_LIST_BUSY() do { \
|
|
MAC_POLICY_LIST_LOCK(); \
|
|
mac_policy_list_busy++; \
|
|
MAC_POLICY_LIST_UNLOCK(); \
|
|
} while (0)
|
|
|
|
#define MAC_POLICY_LIST_UNBUSY() do { \
|
|
MAC_POLICY_LIST_LOCK(); \
|
|
mac_policy_list_busy--; \
|
|
if (mac_policy_list_busy < 0) \
|
|
panic("Extra mac_policy_list_busy--"); \
|
|
MAC_POLICY_LIST_UNLOCK(); \
|
|
} while (0)
|
|
|
|
/*
|
|
* MAC_CHECK performs the designated check by walking the policy
|
|
* module list and checking with each as to how it feels about the
|
|
* request. Note that it returns its value via 'error' in the scope
|
|
* of the caller.
|
|
*/
|
|
#define MAC_CHECK(check, args...) do { \
|
|
struct mac_policy_conf *mpc; \
|
|
\
|
|
error = 0; \
|
|
MAC_POLICY_LIST_BUSY(); \
|
|
LIST_FOREACH(mpc, &mac_policy_list, mpc_list) { \
|
|
if (mpc->mpc_ops->mpo_ ## check != NULL) \
|
|
error = error_select( \
|
|
mpc->mpc_ops->mpo_ ## check (args), \
|
|
error); \
|
|
} \
|
|
MAC_POLICY_LIST_UNBUSY(); \
|
|
} while (0)
|
|
|
|
/*
|
|
* MAC_BOOLEAN performs the designated boolean composition by walking
|
|
* the module list, invoking each instance of the operation, and
|
|
* combining the results using the passed C operator. Note that it
|
|
* returns its value via 'result' in the scope of the caller, which
|
|
* should be initialized by the caller in a meaningful way to get
|
|
* a meaningful result.
|
|
*/
|
|
#define MAC_BOOLEAN(operation, composition, args...) do { \
|
|
struct mac_policy_conf *mpc; \
|
|
\
|
|
MAC_POLICY_LIST_BUSY(); \
|
|
LIST_FOREACH(mpc, &mac_policy_list, mpc_list) { \
|
|
if (mpc->mpc_ops->mpo_ ## operation != NULL) \
|
|
result = result composition \
|
|
mpc->mpc_ops->mpo_ ## operation (args); \
|
|
} \
|
|
MAC_POLICY_LIST_UNBUSY(); \
|
|
} while (0)
|
|
|
|
#define MAC_EXTERNALIZE(type, label, elementlist, outbuf, \
|
|
outbuflen) do { \
|
|
char *curptr, *curptr_start, *element_name, *element_temp; \
|
|
size_t left, left_start, len; \
|
|
int claimed, first, first_start, ignorenotfound; \
|
|
\
|
|
error = 0; \
|
|
element_temp = elementlist; \
|
|
curptr = outbuf; \
|
|
curptr[0] = '\0'; \
|
|
left = outbuflen; \
|
|
first = 1; \
|
|
while ((element_name = strsep(&element_temp, ",")) != NULL) { \
|
|
curptr_start = curptr; \
|
|
left_start = left; \
|
|
first_start = first; \
|
|
if (element_name[0] == '?') { \
|
|
element_name++; \
|
|
ignorenotfound = 1; \
|
|
} else \
|
|
ignorenotfound = 0; \
|
|
claimed = 0; \
|
|
if (first) { \
|
|
len = snprintf(curptr, left, "%s/", \
|
|
element_name); \
|
|
first = 0; \
|
|
} else \
|
|
len = snprintf(curptr, left, ",%s/", \
|
|
element_name); \
|
|
if (len >= left) { \
|
|
error = EINVAL; /* XXXMAC: E2BIG */ \
|
|
break; \
|
|
} \
|
|
curptr += len; \
|
|
left -= len; \
|
|
\
|
|
MAC_CHECK(externalize_ ## type, label, element_name, \
|
|
curptr, left, &len, &claimed); \
|
|
if (error) \
|
|
break; \
|
|
if (claimed == 1) { \
|
|
if (len >= outbuflen) { \
|
|
error = EINVAL; /* XXXMAC: E2BIG */ \
|
|
break; \
|
|
} \
|
|
curptr += len; \
|
|
left -= len; \
|
|
} else if (claimed == 0 && ignorenotfound) { \
|
|
/* \
|
|
* Revert addition of the label element \
|
|
* name. \
|
|
*/ \
|
|
curptr = curptr_start; \
|
|
*curptr = '\0'; \
|
|
left = left_start; \
|
|
first = first_start; \
|
|
} else { \
|
|
error = EINVAL; /* XXXMAC: ENOLABEL */ \
|
|
break; \
|
|
} \
|
|
} \
|
|
} while (0)
|
|
|
|
#define MAC_INTERNALIZE(type, label, instring) do { \
|
|
char *element, *element_name, *element_data; \
|
|
int claimed; \
|
|
\
|
|
error = 0; \
|
|
element = instring; \
|
|
while ((element_name = strsep(&element, ",")) != NULL) { \
|
|
element_data = element_name; \
|
|
element_name = strsep(&element_data, "/"); \
|
|
if (element_data == NULL) { \
|
|
error = EINVAL; \
|
|
break; \
|
|
} \
|
|
claimed = 0; \
|
|
MAC_CHECK(internalize_ ## type, label, element_name, \
|
|
element_data, &claimed); \
|
|
if (error) \
|
|
break; \
|
|
if (claimed != 1) { \
|
|
/* XXXMAC: Another error here? */ \
|
|
error = EINVAL; \
|
|
break; \
|
|
} \
|
|
} \
|
|
} while (0)
|
|
|
|
/*
|
|
* MAC_PERFORM performs the designated operation by walking the policy
|
|
* module list and invoking that operation for each policy.
|
|
*/
|
|
#define MAC_PERFORM(operation, args...) do { \
|
|
struct mac_policy_conf *mpc; \
|
|
\
|
|
MAC_POLICY_LIST_BUSY(); \
|
|
LIST_FOREACH(mpc, &mac_policy_list, mpc_list) { \
|
|
if (mpc->mpc_ops->mpo_ ## operation != NULL) \
|
|
mpc->mpc_ops->mpo_ ## operation (args); \
|
|
} \
|
|
MAC_POLICY_LIST_UNBUSY(); \
|
|
} while (0)
|
|
|
|
/*
|
|
* Initialize the MAC subsystem, including appropriate SMP locks.
|
|
*/
|
|
static void
|
|
mac_init(void)
|
|
{
|
|
|
|
LIST_INIT(&mac_policy_list);
|
|
MAC_POLICY_LIST_LOCKINIT();
|
|
}
|
|
|
|
/*
|
|
* For the purposes of modules that want to know if they were loaded
|
|
* "early", set the mac_late flag once we've processed modules either
|
|
* linked into the kernel, or loaded before the kernel startup.
|
|
*/
|
|
static void
|
|
mac_late_init(void)
|
|
{
|
|
|
|
mac_late = 1;
|
|
}
|
|
|
|
/*
|
|
* Allow MAC policy modules to register during boot, etc.
|
|
*/
|
|
int
|
|
mac_policy_modevent(module_t mod, int type, void *data)
|
|
{
|
|
struct mac_policy_conf *mpc;
|
|
int error;
|
|
|
|
error = 0;
|
|
mpc = (struct mac_policy_conf *) data;
|
|
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
if (mpc->mpc_loadtime_flags & MPC_LOADTIME_FLAG_NOTLATE &&
|
|
mac_late) {
|
|
printf("mac_policy_modevent: can't load %s policy "
|
|
"after booting\n", mpc->mpc_name);
|
|
error = EBUSY;
|
|
break;
|
|
}
|
|
error = mac_policy_register(mpc);
|
|
break;
|
|
case MOD_UNLOAD:
|
|
/* Don't unregister the module if it was never registered. */
|
|
if ((mpc->mpc_runtime_flags & MPC_RUNTIME_FLAG_REGISTERED)
|
|
!= 0)
|
|
error = mac_policy_unregister(mpc);
|
|
else
|
|
error = 0;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_policy_register(struct mac_policy_conf *mpc)
|
|
{
|
|
struct mac_policy_conf *tmpc;
|
|
int slot;
|
|
|
|
MAC_POLICY_LIST_LOCK();
|
|
if (mac_policy_list_busy > 0) {
|
|
MAC_POLICY_LIST_UNLOCK();
|
|
return (EBUSY);
|
|
}
|
|
LIST_FOREACH(tmpc, &mac_policy_list, mpc_list) {
|
|
if (strcmp(tmpc->mpc_name, mpc->mpc_name) == 0) {
|
|
MAC_POLICY_LIST_UNLOCK();
|
|
return (EEXIST);
|
|
}
|
|
}
|
|
if (mpc->mpc_field_off != NULL) {
|
|
slot = ffs(mac_policy_offsets_free);
|
|
if (slot == 0) {
|
|
MAC_POLICY_LIST_UNLOCK();
|
|
return (ENOMEM);
|
|
}
|
|
slot--;
|
|
mac_policy_offsets_free &= ~(1 << slot);
|
|
*mpc->mpc_field_off = slot;
|
|
}
|
|
mpc->mpc_runtime_flags |= MPC_RUNTIME_FLAG_REGISTERED;
|
|
LIST_INSERT_HEAD(&mac_policy_list, mpc, mpc_list);
|
|
|
|
/* Per-policy initialization. */
|
|
if (mpc->mpc_ops->mpo_init != NULL)
|
|
(*(mpc->mpc_ops->mpo_init))(mpc);
|
|
MAC_POLICY_LIST_UNLOCK();
|
|
|
|
printf("Security policy loaded: %s (%s)\n", mpc->mpc_fullname,
|
|
mpc->mpc_name);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_policy_unregister(struct mac_policy_conf *mpc)
|
|
{
|
|
|
|
/*
|
|
* If we fail the load, we may get a request to unload. Check
|
|
* to see if we did the run-time registration, and if not,
|
|
* silently succeed.
|
|
*/
|
|
MAC_POLICY_LIST_LOCK();
|
|
if ((mpc->mpc_runtime_flags & MPC_RUNTIME_FLAG_REGISTERED) == 0) {
|
|
MAC_POLICY_LIST_UNLOCK();
|
|
return (0);
|
|
}
|
|
#if 0
|
|
/*
|
|
* Don't allow unloading modules with private data.
|
|
*/
|
|
if (mpc->mpc_field_off != NULL) {
|
|
MAC_POLICY_LIST_UNLOCK();
|
|
return (EBUSY);
|
|
}
|
|
#endif
|
|
/*
|
|
* Only allow the unload to proceed if the module is unloadable
|
|
* by its own definition.
|
|
*/
|
|
if ((mpc->mpc_loadtime_flags & MPC_LOADTIME_FLAG_UNLOADOK) == 0) {
|
|
MAC_POLICY_LIST_UNLOCK();
|
|
return (EBUSY);
|
|
}
|
|
/*
|
|
* Right now, we EBUSY if the list is in use. In the future,
|
|
* for reliability reasons, we might want to sleep and wakeup
|
|
* later to try again.
|
|
*/
|
|
if (mac_policy_list_busy > 0) {
|
|
MAC_POLICY_LIST_UNLOCK();
|
|
return (EBUSY);
|
|
}
|
|
if (mpc->mpc_ops->mpo_destroy != NULL)
|
|
(*(mpc->mpc_ops->mpo_destroy))(mpc);
|
|
|
|
LIST_REMOVE(mpc, mpc_list);
|
|
MAC_POLICY_LIST_UNLOCK();
|
|
|
|
mpc->mpc_runtime_flags &= ~MPC_RUNTIME_FLAG_REGISTERED;
|
|
|
|
printf("Security policy unload: %s (%s)\n", mpc->mpc_fullname,
|
|
mpc->mpc_name);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Define an error value precedence, and given two arguments, selects the
|
|
* value with the higher precedence.
|
|
*/
|
|
static int
|
|
error_select(int error1, int error2)
|
|
{
|
|
|
|
/* Certain decision-making errors take top priority. */
|
|
if (error1 == EDEADLK || error2 == EDEADLK)
|
|
return (EDEADLK);
|
|
|
|
/* Invalid arguments should be reported where possible. */
|
|
if (error1 == EINVAL || error2 == EINVAL)
|
|
return (EINVAL);
|
|
|
|
/* Precedence goes to "visibility", with both process and file. */
|
|
if (error1 == ESRCH || error2 == ESRCH)
|
|
return (ESRCH);
|
|
|
|
if (error1 == ENOENT || error2 == ENOENT)
|
|
return (ENOENT);
|
|
|
|
/* Precedence goes to DAC/MAC protections. */
|
|
if (error1 == EACCES || error2 == EACCES)
|
|
return (EACCES);
|
|
|
|
/* Precedence goes to privilege. */
|
|
if (error1 == EPERM || error2 == EPERM)
|
|
return (EPERM);
|
|
|
|
/* Precedence goes to error over success; otherwise, arbitrary. */
|
|
if (error1 != 0)
|
|
return (error1);
|
|
return (error2);
|
|
}
|
|
|
|
static void
|
|
mac_init_label(struct label *label)
|
|
{
|
|
|
|
bzero(label, sizeof(*label));
|
|
label->l_flags = MAC_FLAG_INITIALIZED;
|
|
}
|
|
|
|
static void
|
|
mac_destroy_label(struct label *label)
|
|
{
|
|
|
|
KASSERT(label->l_flags & MAC_FLAG_INITIALIZED,
|
|
("destroying uninitialized label"));
|
|
|
|
bzero(label, sizeof(*label));
|
|
/* implicit: label->l_flags &= ~MAC_FLAG_INITIALIZED; */
|
|
}
|
|
|
|
void
|
|
mac_init_bpfdesc(struct bpf_d *bpf_d)
|
|
{
|
|
|
|
mac_init_label(&bpf_d->bd_label);
|
|
MAC_PERFORM(init_bpfdesc_label, &bpf_d->bd_label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_add_int(&nmacbpfdescs, 1);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
mac_init_cred_label(struct label *label)
|
|
{
|
|
|
|
mac_init_label(label);
|
|
MAC_PERFORM(init_cred_label, label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_add_int(&nmaccreds, 1);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
mac_init_cred(struct ucred *cred)
|
|
{
|
|
|
|
mac_init_cred_label(&cred->cr_label);
|
|
}
|
|
|
|
void
|
|
mac_init_devfsdirent(struct devfs_dirent *de)
|
|
{
|
|
|
|
mac_init_label(&de->de_label);
|
|
MAC_PERFORM(init_devfsdirent_label, &de->de_label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_add_int(&nmacdevfsdirents, 1);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
mac_init_ifnet_label(struct label *label)
|
|
{
|
|
|
|
mac_init_label(label);
|
|
MAC_PERFORM(init_ifnet_label, label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_add_int(&nmacifnets, 1);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
mac_init_ifnet(struct ifnet *ifp)
|
|
{
|
|
|
|
mac_init_ifnet_label(&ifp->if_label);
|
|
}
|
|
|
|
void
|
|
mac_init_ipq(struct ipq *ipq)
|
|
{
|
|
|
|
mac_init_label(&ipq->ipq_label);
|
|
MAC_PERFORM(init_ipq_label, &ipq->ipq_label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_add_int(&nmacipqs, 1);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
mac_init_mbuf(struct mbuf *m, int flag)
|
|
{
|
|
int error;
|
|
|
|
KASSERT(m->m_flags & M_PKTHDR, ("mac_init_mbuf on non-header mbuf"));
|
|
|
|
mac_init_label(&m->m_pkthdr.label);
|
|
|
|
MAC_CHECK(init_mbuf_label, &m->m_pkthdr.label, flag);
|
|
if (error) {
|
|
MAC_PERFORM(destroy_mbuf_label, &m->m_pkthdr.label);
|
|
mac_destroy_label(&m->m_pkthdr.label);
|
|
}
|
|
|
|
#ifdef MAC_DEBUG
|
|
if (error == 0)
|
|
atomic_add_int(&nmacmbufs, 1);
|
|
#endif
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
mac_init_mount(struct mount *mp)
|
|
{
|
|
|
|
mac_init_label(&mp->mnt_mntlabel);
|
|
mac_init_label(&mp->mnt_fslabel);
|
|
MAC_PERFORM(init_mount_label, &mp->mnt_mntlabel);
|
|
MAC_PERFORM(init_mount_fs_label, &mp->mnt_fslabel);
|
|
#ifdef MAC_DEBUG
|
|
atomic_add_int(&nmacmounts, 1);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
mac_init_pipe_label(struct label *label)
|
|
{
|
|
|
|
mac_init_label(label);
|
|
MAC_PERFORM(init_pipe_label, label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_add_int(&nmacpipes, 1);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
mac_init_pipe(struct pipe *pipe)
|
|
{
|
|
struct label *label;
|
|
|
|
label = malloc(sizeof(struct label), M_MACPIPELABEL, M_ZERO|M_WAITOK);
|
|
pipe->pipe_label = label;
|
|
pipe->pipe_peer->pipe_label = label;
|
|
mac_init_pipe_label(label);
|
|
}
|
|
|
|
static int
|
|
mac_init_socket_label(struct label *label, int flag)
|
|
{
|
|
int error;
|
|
|
|
mac_init_label(label);
|
|
|
|
MAC_CHECK(init_socket_label, label, flag);
|
|
if (error) {
|
|
MAC_PERFORM(destroy_socket_label, label);
|
|
mac_destroy_label(label);
|
|
}
|
|
|
|
#ifdef MAC_DEBUG
|
|
if (error == 0)
|
|
atomic_add_int(&nmacsockets, 1);
|
|
#endif
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_init_socket_peer_label(struct label *label, int flag)
|
|
{
|
|
int error;
|
|
|
|
mac_init_label(label);
|
|
|
|
MAC_CHECK(init_socket_peer_label, label, flag);
|
|
if (error) {
|
|
MAC_PERFORM(destroy_socket_label, label);
|
|
mac_destroy_label(label);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_init_socket(struct socket *socket, int flag)
|
|
{
|
|
int error;
|
|
|
|
error = mac_init_socket_label(&socket->so_label, flag);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_init_socket_peer_label(&socket->so_peerlabel, flag);
|
|
if (error)
|
|
mac_destroy_socket_label(&socket->so_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
mac_init_vnode_label(struct label *label)
|
|
{
|
|
|
|
mac_init_label(label);
|
|
MAC_PERFORM(init_vnode_label, label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_add_int(&nmacvnodes, 1);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
mac_init_vnode(struct vnode *vp)
|
|
{
|
|
|
|
mac_init_vnode_label(&vp->v_label);
|
|
}
|
|
|
|
void
|
|
mac_destroy_bpfdesc(struct bpf_d *bpf_d)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_bpfdesc_label, &bpf_d->bd_label);
|
|
mac_destroy_label(&bpf_d->bd_label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_subtract_int(&nmacbpfdescs, 1);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
mac_destroy_cred_label(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_cred_label, label);
|
|
mac_destroy_label(label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_subtract_int(&nmaccreds, 1);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
mac_destroy_cred(struct ucred *cred)
|
|
{
|
|
|
|
mac_destroy_cred_label(&cred->cr_label);
|
|
}
|
|
|
|
void
|
|
mac_destroy_devfsdirent(struct devfs_dirent *de)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_devfsdirent_label, &de->de_label);
|
|
mac_destroy_label(&de->de_label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_subtract_int(&nmacdevfsdirents, 1);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
mac_destroy_ifnet_label(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_ifnet_label, label);
|
|
mac_destroy_label(label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_subtract_int(&nmacifnets, 1);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
mac_destroy_ifnet(struct ifnet *ifp)
|
|
{
|
|
|
|
mac_destroy_ifnet_label(&ifp->if_label);
|
|
}
|
|
|
|
void
|
|
mac_destroy_ipq(struct ipq *ipq)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_ipq_label, &ipq->ipq_label);
|
|
mac_destroy_label(&ipq->ipq_label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_subtract_int(&nmacipqs, 1);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
mac_destroy_mbuf(struct mbuf *m)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_mbuf_label, &m->m_pkthdr.label);
|
|
mac_destroy_label(&m->m_pkthdr.label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_subtract_int(&nmacmbufs, 1);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
mac_destroy_mount(struct mount *mp)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_mount_label, &mp->mnt_mntlabel);
|
|
MAC_PERFORM(destroy_mount_fs_label, &mp->mnt_fslabel);
|
|
mac_destroy_label(&mp->mnt_fslabel);
|
|
mac_destroy_label(&mp->mnt_mntlabel);
|
|
#ifdef MAC_DEBUG
|
|
atomic_subtract_int(&nmacmounts, 1);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
mac_destroy_pipe_label(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_pipe_label, label);
|
|
mac_destroy_label(label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_subtract_int(&nmacpipes, 1);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
mac_destroy_pipe(struct pipe *pipe)
|
|
{
|
|
|
|
mac_destroy_pipe_label(pipe->pipe_label);
|
|
free(pipe->pipe_label, M_MACPIPELABEL);
|
|
}
|
|
|
|
static void
|
|
mac_destroy_socket_label(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_socket_label, label);
|
|
mac_destroy_label(label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_subtract_int(&nmacsockets, 1);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
mac_destroy_socket_peer_label(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_socket_peer_label, label);
|
|
mac_destroy_label(label);
|
|
}
|
|
|
|
void
|
|
mac_destroy_socket(struct socket *socket)
|
|
{
|
|
|
|
mac_destroy_socket_label(&socket->so_label);
|
|
mac_destroy_socket_peer_label(&socket->so_peerlabel);
|
|
}
|
|
|
|
void
|
|
mac_destroy_vnode_label(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_vnode_label, label);
|
|
mac_destroy_label(label);
|
|
#ifdef MAC_DEBUG
|
|
atomic_subtract_int(&nmacvnodes, 1);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
mac_destroy_vnode(struct vnode *vp)
|
|
{
|
|
|
|
mac_destroy_vnode_label(&vp->v_label);
|
|
}
|
|
|
|
static void
|
|
mac_copy_pipe_label(struct label *src, struct label *dest)
|
|
{
|
|
|
|
MAC_PERFORM(copy_pipe_label, src, dest);
|
|
}
|
|
|
|
void
|
|
mac_copy_vnode_label(struct label *src, struct label *dest)
|
|
{
|
|
|
|
MAC_PERFORM(copy_vnode_label, src, dest);
|
|
}
|
|
|
|
static int
|
|
mac_check_structmac_consistent(struct mac *mac)
|
|
{
|
|
|
|
if (mac->m_buflen > MAC_MAX_LABEL_BUF_LEN)
|
|
return (EINVAL);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mac_externalize_cred_label(struct label *label, char *elements,
|
|
char *outbuf, size_t outbuflen, int flags)
|
|
{
|
|
int error;
|
|
|
|
MAC_EXTERNALIZE(cred_label, label, elements, outbuf, outbuflen);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_externalize_ifnet_label(struct label *label, char *elements,
|
|
char *outbuf, size_t outbuflen, int flags)
|
|
{
|
|
int error;
|
|
|
|
MAC_EXTERNALIZE(ifnet_label, label, elements, outbuf, outbuflen);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_externalize_pipe_label(struct label *label, char *elements,
|
|
char *outbuf, size_t outbuflen, int flags)
|
|
{
|
|
int error;
|
|
|
|
MAC_EXTERNALIZE(pipe_label, label, elements, outbuf, outbuflen);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_externalize_socket_label(struct label *label, char *elements,
|
|
char *outbuf, size_t outbuflen, int flags)
|
|
{
|
|
int error;
|
|
|
|
MAC_EXTERNALIZE(socket_label, label, elements, outbuf, outbuflen);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_externalize_socket_peer_label(struct label *label, char *elements,
|
|
char *outbuf, size_t outbuflen, int flags)
|
|
{
|
|
int error;
|
|
|
|
MAC_EXTERNALIZE(socket_peer_label, label, elements, outbuf, outbuflen);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_externalize_vnode_label(struct label *label, char *elements,
|
|
char *outbuf, size_t outbuflen, int flags)
|
|
{
|
|
int error;
|
|
|
|
MAC_EXTERNALIZE(vnode_label, label, elements, outbuf, outbuflen);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_internalize_cred_label(struct label *label, char *string)
|
|
{
|
|
int error;
|
|
|
|
MAC_INTERNALIZE(cred_label, label, string);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_internalize_ifnet_label(struct label *label, char *string)
|
|
{
|
|
int error;
|
|
|
|
MAC_INTERNALIZE(ifnet_label, label, string);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_internalize_pipe_label(struct label *label, char *string)
|
|
{
|
|
int error;
|
|
|
|
MAC_INTERNALIZE(pipe_label, label, string);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_internalize_socket_label(struct label *label, char *string)
|
|
{
|
|
int error;
|
|
|
|
MAC_INTERNALIZE(socket_label, label, string);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_internalize_vnode_label(struct label *label, char *string)
|
|
{
|
|
int error;
|
|
|
|
MAC_INTERNALIZE(vnode_label, label, string);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Initialize MAC label for the first kernel process, from which other
|
|
* kernel processes and threads are spawned.
|
|
*/
|
|
void
|
|
mac_create_proc0(struct ucred *cred)
|
|
{
|
|
|
|
MAC_PERFORM(create_proc0, cred);
|
|
}
|
|
|
|
/*
|
|
* Initialize MAC label for the first userland process, from which other
|
|
* userland processes and threads are spawned.
|
|
*/
|
|
void
|
|
mac_create_proc1(struct ucred *cred)
|
|
{
|
|
|
|
MAC_PERFORM(create_proc1, cred);
|
|
}
|
|
|
|
void
|
|
mac_thread_userret(struct thread *td)
|
|
{
|
|
|
|
MAC_PERFORM(thread_userret, td);
|
|
}
|
|
|
|
/*
|
|
* When a new process is created, its label must be initialized. Generally,
|
|
* this involves inheritence from the parent process, modulo possible
|
|
* deltas. This function allows that processing to take place.
|
|
*/
|
|
void
|
|
mac_create_cred(struct ucred *parent_cred, struct ucred *child_cred)
|
|
{
|
|
|
|
MAC_PERFORM(create_cred, parent_cred, child_cred);
|
|
}
|
|
|
|
void
|
|
mac_update_devfsdirent(struct devfs_dirent *de, struct vnode *vp)
|
|
{
|
|
|
|
MAC_PERFORM(update_devfsdirent, de, &de->de_label, vp, &vp->v_label);
|
|
}
|
|
|
|
void
|
|
mac_associate_vnode_devfs(struct mount *mp, struct devfs_dirent *de,
|
|
struct vnode *vp)
|
|
{
|
|
|
|
MAC_PERFORM(associate_vnode_devfs, mp, &mp->mnt_fslabel, de,
|
|
&de->de_label, vp, &vp->v_label);
|
|
}
|
|
|
|
int
|
|
mac_associate_vnode_extattr(struct mount *mp, struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_associate_vnode_extattr");
|
|
|
|
MAC_CHECK(associate_vnode_extattr, mp, &mp->mnt_fslabel, vp,
|
|
&vp->v_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
mac_associate_vnode_singlelabel(struct mount *mp, struct vnode *vp)
|
|
{
|
|
|
|
MAC_PERFORM(associate_vnode_singlelabel, mp, &mp->mnt_fslabel, vp,
|
|
&vp->v_label);
|
|
}
|
|
|
|
int
|
|
mac_create_vnode_extattr(struct ucred *cred, struct mount *mp,
|
|
struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_create_vnode_extattr");
|
|
ASSERT_VOP_LOCKED(vp, "mac_create_vnode_extattr");
|
|
|
|
error = VOP_OPENEXTATTR(vp, cred, curthread);
|
|
if (error == EOPNOTSUPP) {
|
|
/* XXX: Optionally abort if transactions not supported. */
|
|
if (ea_warn_once == 0) {
|
|
printf("Warning: transactions not supported "
|
|
"in EA write.\n");
|
|
ea_warn_once = 1;
|
|
}
|
|
} else if (error)
|
|
return (error);
|
|
|
|
MAC_CHECK(create_vnode_extattr, cred, mp, &mp->mnt_fslabel,
|
|
dvp, &dvp->v_label, vp, &vp->v_label, cnp);
|
|
|
|
if (error) {
|
|
VOP_CLOSEEXTATTR(vp, 0, NOCRED, curthread);
|
|
return (error);
|
|
}
|
|
|
|
error = VOP_CLOSEEXTATTR(vp, 1, NOCRED, curthread);
|
|
|
|
if (error == EOPNOTSUPP)
|
|
error = 0; /* XXX */
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_setlabel_vnode_extattr(struct ucred *cred, struct vnode *vp,
|
|
struct label *intlabel)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_setlabel_vnode_extattr");
|
|
|
|
error = VOP_OPENEXTATTR(vp, cred, curthread);
|
|
if (error == EOPNOTSUPP) {
|
|
/* XXX: Optionally abort if transactions not supported. */
|
|
if (ea_warn_once == 0) {
|
|
printf("Warning: transactions not supported "
|
|
"in EA write.\n");
|
|
ea_warn_once = 1;
|
|
}
|
|
} else if (error)
|
|
return (error);
|
|
|
|
MAC_CHECK(setlabel_vnode_extattr, cred, vp, &vp->v_label, intlabel);
|
|
|
|
if (error) {
|
|
VOP_CLOSEEXTATTR(vp, 0, NOCRED, curthread);
|
|
return (error);
|
|
}
|
|
|
|
error = VOP_CLOSEEXTATTR(vp, 1, NOCRED, curthread);
|
|
|
|
if (error == EOPNOTSUPP)
|
|
error = 0; /* XXX */
|
|
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
mac_execve_transition(struct ucred *old, struct ucred *new, struct vnode *vp)
|
|
{
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_execve_transition");
|
|
|
|
MAC_PERFORM(execve_transition, old, new, vp, &vp->v_label);
|
|
}
|
|
|
|
int
|
|
mac_execve_will_transition(struct ucred *old, struct vnode *vp)
|
|
{
|
|
int result;
|
|
|
|
result = 0;
|
|
MAC_BOOLEAN(execve_will_transition, ||, old, vp, &vp->v_label);
|
|
|
|
return (result);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_access(struct ucred *cred, struct vnode *vp, int acc_mode)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_access");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_access, cred, vp, &vp->v_label, acc_mode);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_chdir");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_chdir, cred, dvp, &dvp->v_label);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_chroot");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_chroot, cred, dvp, &dvp->v_label);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_create(struct ucred *cred, struct vnode *dvp,
|
|
struct componentname *cnp, struct vattr *vap)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_create");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_create, cred, dvp, &dvp->v_label, cnp, vap);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, struct vnode *vp,
|
|
struct componentname *cnp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_delete");
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_delete");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_delete, cred, dvp, &dvp->v_label, vp,
|
|
&vp->v_label, cnp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp,
|
|
acl_type_t type)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_deleteacl");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_deleteacl, cred, vp, &vp->v_label, type);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_exec(struct ucred *cred, struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_exec");
|
|
|
|
if (!mac_enforce_process && !mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_exec, cred, vp, &vp->v_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, acl_type_t type)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_getacl");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_getacl, cred, vp, &vp->v_label, type);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp,
|
|
int attrnamespace, const char *name, struct uio *uio)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_getextattr");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_getextattr, cred, vp, &vp->v_label,
|
|
attrnamespace, name, uio);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_link(struct ucred *cred, struct vnode *dvp,
|
|
struct vnode *vp, struct componentname *cnp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_link");
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_link");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_link, cred, dvp, &dvp->v_label, vp,
|
|
&vp->v_label, cnp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp,
|
|
struct componentname *cnp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_lookup");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_lookup, cred, dvp, &dvp->v_label, cnp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp, int prot)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_mmap");
|
|
|
|
if (!mac_enforce_fs || !mac_enforce_vm)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_mmap, cred, vp, &vp->v_label, prot);
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
mac_check_vnode_mmap_downgrade(struct ucred *cred, struct vnode *vp, int *prot)
|
|
{
|
|
int result = *prot;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_mmap_downgrade");
|
|
|
|
if (!mac_enforce_fs || !mac_enforce_vm)
|
|
return;
|
|
|
|
MAC_PERFORM(check_vnode_mmap_downgrade, cred, vp, &vp->v_label,
|
|
&result);
|
|
|
|
*prot = result;
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp, int prot)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_mprotect");
|
|
|
|
if (!mac_enforce_fs || !mac_enforce_vm)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_mprotect, cred, vp, &vp->v_label, prot);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_open(struct ucred *cred, struct vnode *vp, int acc_mode)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_open");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_open, cred, vp, &vp->v_label, acc_mode);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_poll(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_poll");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_poll, active_cred, file_cred, vp,
|
|
&vp->v_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_read(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_read");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_read, active_cred, file_cred, vp,
|
|
&vp->v_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_readdir(struct ucred *cred, struct vnode *dvp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_readdir");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_readdir, cred, dvp, &dvp->v_label);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_readlink");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_readlink, cred, vp, &vp->v_label);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_check_vnode_relabel(struct ucred *cred, struct vnode *vp,
|
|
struct label *newlabel)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_relabel");
|
|
|
|
MAC_CHECK(check_vnode_relabel, cred, vp, &vp->v_label, newlabel);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp,
|
|
struct vnode *vp, struct componentname *cnp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_rename_from");
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_rename_from");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_rename_from, cred, dvp, &dvp->v_label, vp,
|
|
&vp->v_label, cnp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp,
|
|
struct vnode *vp, int samedir, struct componentname *cnp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_rename_to");
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_rename_to");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_rename_to, cred, dvp, &dvp->v_label, vp,
|
|
vp != NULL ? &vp->v_label : NULL, samedir, cnp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_revoke");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_revoke, cred, vp, &vp->v_label);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, acl_type_t type,
|
|
struct acl *acl)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_setacl");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_setacl, cred, vp, &vp->v_label, type, acl);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp,
|
|
int attrnamespace, const char *name, struct uio *uio)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_setextattr");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_setextattr, cred, vp, &vp->v_label,
|
|
attrnamespace, name, uio);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, u_long flags)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_setflags");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_setflags, cred, vp, &vp->v_label, flags);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, mode_t mode)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_setmode");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_setmode, cred, vp, &vp->v_label, mode);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, uid_t uid,
|
|
gid_t gid)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_setowner");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_setowner, cred, vp, &vp->v_label, uid, gid);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp,
|
|
struct timespec atime, struct timespec mtime)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_setutimes");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_setutimes, cred, vp, &vp->v_label, atime,
|
|
mtime);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_stat(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_stat");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_stat, active_cred, file_cred, vp,
|
|
&vp->v_label);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_write(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_write");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_write, active_cred, file_cred, vp,
|
|
&vp->v_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* When relabeling a process, call out to the policies for the maximum
|
|
* permission allowed for each object type we know about in its
|
|
* memory space, and revoke access (in the least surprising ways we
|
|
* know) when necessary. The process lock is not held here.
|
|
*/
|
|
static void
|
|
mac_cred_mmapped_drop_perms(struct thread *td, struct ucred *cred)
|
|
{
|
|
|
|
/* XXX freeze all other threads */
|
|
mac_cred_mmapped_drop_perms_recurse(td, cred,
|
|
&td->td_proc->p_vmspace->vm_map);
|
|
/* XXX allow other threads to continue */
|
|
}
|
|
|
|
static __inline const char *
|
|
prot2str(vm_prot_t prot)
|
|
{
|
|
|
|
switch (prot & VM_PROT_ALL) {
|
|
case VM_PROT_READ:
|
|
return ("r--");
|
|
case VM_PROT_READ | VM_PROT_WRITE:
|
|
return ("rw-");
|
|
case VM_PROT_READ | VM_PROT_EXECUTE:
|
|
return ("r-x");
|
|
case VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE:
|
|
return ("rwx");
|
|
case VM_PROT_WRITE:
|
|
return ("-w-");
|
|
case VM_PROT_EXECUTE:
|
|
return ("--x");
|
|
case VM_PROT_WRITE | VM_PROT_EXECUTE:
|
|
return ("-wx");
|
|
default:
|
|
return ("---");
|
|
}
|
|
}
|
|
|
|
static void
|
|
mac_cred_mmapped_drop_perms_recurse(struct thread *td, struct ucred *cred,
|
|
struct vm_map *map)
|
|
{
|
|
struct vm_map_entry *vme;
|
|
int result;
|
|
vm_prot_t revokeperms;
|
|
vm_object_t object;
|
|
vm_ooffset_t offset;
|
|
struct vnode *vp;
|
|
|
|
if (!mac_mmap_revocation)
|
|
return;
|
|
|
|
vm_map_lock_read(map);
|
|
for (vme = map->header.next; vme != &map->header; vme = vme->next) {
|
|
if (vme->eflags & MAP_ENTRY_IS_SUB_MAP) {
|
|
mac_cred_mmapped_drop_perms_recurse(td, cred,
|
|
vme->object.sub_map);
|
|
continue;
|
|
}
|
|
/*
|
|
* Skip over entries that obviously are not shared.
|
|
*/
|
|
if (vme->eflags & (MAP_ENTRY_COW | MAP_ENTRY_NOSYNC) ||
|
|
!vme->max_protection)
|
|
continue;
|
|
/*
|
|
* Drill down to the deepest backing object.
|
|
*/
|
|
offset = vme->offset;
|
|
object = vme->object.vm_object;
|
|
if (object == NULL)
|
|
continue;
|
|
while (object->backing_object != NULL) {
|
|
object = object->backing_object;
|
|
offset += object->backing_object_offset;
|
|
}
|
|
/*
|
|
* At the moment, vm_maps and objects aren't considered
|
|
* by the MAC system, so only things with backing by a
|
|
* normal object (read: vnodes) are checked.
|
|
*/
|
|
if (object->type != OBJT_VNODE)
|
|
continue;
|
|
vp = (struct vnode *)object->handle;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
result = vme->max_protection;
|
|
mac_check_vnode_mmap_downgrade(cred, vp, &result);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
/*
|
|
* Find out what maximum protection we may be allowing
|
|
* now but a policy needs to get removed.
|
|
*/
|
|
revokeperms = vme->max_protection & ~result;
|
|
if (!revokeperms)
|
|
continue;
|
|
printf("pid %ld: revoking %s perms from %#lx:%ld "
|
|
"(max %s/cur %s)\n", (long)td->td_proc->p_pid,
|
|
prot2str(revokeperms), (u_long)vme->start,
|
|
(long)(vme->end - vme->start),
|
|
prot2str(vme->max_protection), prot2str(vme->protection));
|
|
vm_map_lock_upgrade(map);
|
|
/*
|
|
* This is the really simple case: if a map has more
|
|
* max_protection than is allowed, but it's not being
|
|
* actually used (that is, the current protection is
|
|
* still allowed), we can just wipe it out and do
|
|
* nothing more.
|
|
*/
|
|
if ((vme->protection & revokeperms) == 0) {
|
|
vme->max_protection -= revokeperms;
|
|
} else {
|
|
if (revokeperms & VM_PROT_WRITE) {
|
|
/*
|
|
* In the more complicated case, flush out all
|
|
* pending changes to the object then turn it
|
|
* copy-on-write.
|
|
*/
|
|
vm_object_reference(object);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
vm_object_page_clean(object,
|
|
OFF_TO_IDX(offset),
|
|
OFF_TO_IDX(offset + vme->end - vme->start +
|
|
PAGE_MASK),
|
|
OBJPC_SYNC);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vm_object_deallocate(object);
|
|
/*
|
|
* Why bother if there's no read permissions
|
|
* anymore? For the rest, we need to leave
|
|
* the write permissions on for COW, or
|
|
* remove them entirely if configured to.
|
|
*/
|
|
if (!mac_mmap_revocation_via_cow) {
|
|
vme->max_protection &= ~VM_PROT_WRITE;
|
|
vme->protection &= ~VM_PROT_WRITE;
|
|
} if ((revokeperms & VM_PROT_READ) == 0)
|
|
vme->eflags |= MAP_ENTRY_COW |
|
|
MAP_ENTRY_NEEDS_COPY;
|
|
}
|
|
if (revokeperms & VM_PROT_EXECUTE) {
|
|
vme->max_protection &= ~VM_PROT_EXECUTE;
|
|
vme->protection &= ~VM_PROT_EXECUTE;
|
|
}
|
|
if (revokeperms & VM_PROT_READ) {
|
|
vme->max_protection = 0;
|
|
vme->protection = 0;
|
|
}
|
|
pmap_protect(map->pmap, vme->start, vme->end,
|
|
vme->protection & ~revokeperms);
|
|
vm_map_simplify_entry(map, vme);
|
|
}
|
|
vm_map_lock_downgrade(map);
|
|
}
|
|
vm_map_unlock_read(map);
|
|
}
|
|
|
|
/*
|
|
* When the subject's label changes, it may require revocation of privilege
|
|
* to mapped objects. This can't be done on-the-fly later with a unified
|
|
* buffer cache.
|
|
*/
|
|
static void
|
|
mac_relabel_cred(struct ucred *cred, struct label *newlabel)
|
|
{
|
|
|
|
MAC_PERFORM(relabel_cred, cred, newlabel);
|
|
}
|
|
|
|
void
|
|
mac_relabel_vnode(struct ucred *cred, struct vnode *vp, struct label *newlabel)
|
|
{
|
|
|
|
MAC_PERFORM(relabel_vnode, cred, vp, &vp->v_label, newlabel);
|
|
}
|
|
|
|
void
|
|
mac_create_ifnet(struct ifnet *ifnet)
|
|
{
|
|
|
|
MAC_PERFORM(create_ifnet, ifnet, &ifnet->if_label);
|
|
}
|
|
|
|
void
|
|
mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d)
|
|
{
|
|
|
|
MAC_PERFORM(create_bpfdesc, cred, bpf_d, &bpf_d->bd_label);
|
|
}
|
|
|
|
void
|
|
mac_create_socket(struct ucred *cred, struct socket *socket)
|
|
{
|
|
|
|
MAC_PERFORM(create_socket, cred, socket, &socket->so_label);
|
|
}
|
|
|
|
void
|
|
mac_create_pipe(struct ucred *cred, struct pipe *pipe)
|
|
{
|
|
|
|
MAC_PERFORM(create_pipe, cred, pipe, pipe->pipe_label);
|
|
}
|
|
|
|
void
|
|
mac_create_socket_from_socket(struct socket *oldsocket,
|
|
struct socket *newsocket)
|
|
{
|
|
|
|
MAC_PERFORM(create_socket_from_socket, oldsocket, &oldsocket->so_label,
|
|
newsocket, &newsocket->so_label);
|
|
}
|
|
|
|
static void
|
|
mac_relabel_socket(struct ucred *cred, struct socket *socket,
|
|
struct label *newlabel)
|
|
{
|
|
|
|
MAC_PERFORM(relabel_socket, cred, socket, &socket->so_label, newlabel);
|
|
}
|
|
|
|
static void
|
|
mac_relabel_pipe(struct ucred *cred, struct pipe *pipe, struct label *newlabel)
|
|
{
|
|
|
|
MAC_PERFORM(relabel_pipe, cred, pipe, pipe->pipe_label, newlabel);
|
|
}
|
|
|
|
void
|
|
mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, struct socket *socket)
|
|
{
|
|
|
|
MAC_PERFORM(set_socket_peer_from_mbuf, mbuf, &mbuf->m_pkthdr.label,
|
|
socket, &socket->so_peerlabel);
|
|
}
|
|
|
|
void
|
|
mac_set_socket_peer_from_socket(struct socket *oldsocket,
|
|
struct socket *newsocket)
|
|
{
|
|
|
|
MAC_PERFORM(set_socket_peer_from_socket, oldsocket,
|
|
&oldsocket->so_label, newsocket, &newsocket->so_peerlabel);
|
|
}
|
|
|
|
void
|
|
mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram)
|
|
{
|
|
|
|
MAC_PERFORM(create_datagram_from_ipq, ipq, &ipq->ipq_label,
|
|
datagram, &datagram->m_pkthdr.label);
|
|
}
|
|
|
|
void
|
|
mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment)
|
|
{
|
|
|
|
MAC_PERFORM(create_fragment, datagram, &datagram->m_pkthdr.label,
|
|
fragment, &fragment->m_pkthdr.label);
|
|
}
|
|
|
|
void
|
|
mac_create_ipq(struct mbuf *fragment, struct ipq *ipq)
|
|
{
|
|
|
|
MAC_PERFORM(create_ipq, fragment, &fragment->m_pkthdr.label, ipq,
|
|
&ipq->ipq_label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf)
|
|
{
|
|
|
|
MAC_PERFORM(create_mbuf_from_mbuf, oldmbuf, &oldmbuf->m_pkthdr.label,
|
|
newmbuf, &newmbuf->m_pkthdr.label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *mbuf)
|
|
{
|
|
|
|
MAC_PERFORM(create_mbuf_from_bpfdesc, bpf_d, &bpf_d->bd_label, mbuf,
|
|
&mbuf->m_pkthdr.label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *mbuf)
|
|
{
|
|
|
|
MAC_PERFORM(create_mbuf_linklayer, ifnet, &ifnet->if_label, mbuf,
|
|
&mbuf->m_pkthdr.label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *mbuf)
|
|
{
|
|
|
|
MAC_PERFORM(create_mbuf_from_ifnet, ifnet, &ifnet->if_label, mbuf,
|
|
&mbuf->m_pkthdr.label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, struct ifnet *ifnet,
|
|
struct mbuf *newmbuf)
|
|
{
|
|
|
|
MAC_PERFORM(create_mbuf_multicast_encap, oldmbuf,
|
|
&oldmbuf->m_pkthdr.label, ifnet, &ifnet->if_label, newmbuf,
|
|
&newmbuf->m_pkthdr.label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf)
|
|
{
|
|
|
|
MAC_PERFORM(create_mbuf_netlayer, oldmbuf, &oldmbuf->m_pkthdr.label,
|
|
newmbuf, &newmbuf->m_pkthdr.label);
|
|
}
|
|
|
|
int
|
|
mac_fragment_match(struct mbuf *fragment, struct ipq *ipq)
|
|
{
|
|
int result;
|
|
|
|
result = 1;
|
|
MAC_BOOLEAN(fragment_match, &&, fragment, &fragment->m_pkthdr.label,
|
|
ipq, &ipq->ipq_label);
|
|
|
|
return (result);
|
|
}
|
|
|
|
void
|
|
mac_update_ipq(struct mbuf *fragment, struct ipq *ipq)
|
|
{
|
|
|
|
MAC_PERFORM(update_ipq, fragment, &fragment->m_pkthdr.label, ipq,
|
|
&ipq->ipq_label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_from_socket(struct socket *socket, struct mbuf *mbuf)
|
|
{
|
|
|
|
MAC_PERFORM(create_mbuf_from_socket, socket, &socket->so_label, mbuf,
|
|
&mbuf->m_pkthdr.label);
|
|
}
|
|
|
|
void
|
|
mac_create_mount(struct ucred *cred, struct mount *mp)
|
|
{
|
|
|
|
MAC_PERFORM(create_mount, cred, mp, &mp->mnt_mntlabel,
|
|
&mp->mnt_fslabel);
|
|
}
|
|
|
|
void
|
|
mac_create_root_mount(struct ucred *cred, struct mount *mp)
|
|
{
|
|
|
|
MAC_PERFORM(create_root_mount, cred, mp, &mp->mnt_mntlabel,
|
|
&mp->mnt_fslabel);
|
|
}
|
|
|
|
int
|
|
mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_network)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_bpfdesc_receive, bpf_d, &bpf_d->bd_label, ifnet,
|
|
&ifnet->if_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_check_cred_relabel(struct ucred *cred, struct label *newlabel)
|
|
{
|
|
int error;
|
|
|
|
MAC_CHECK(check_cred_relabel, cred, newlabel);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_cred_visible(struct ucred *u1, struct ucred *u2)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_process)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_cred_visible, u1, u2);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *mbuf)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_network)
|
|
return (0);
|
|
|
|
KASSERT(mbuf->m_flags & M_PKTHDR, ("packet has no pkthdr"));
|
|
if (!(mbuf->m_pkthdr.label.l_flags & MAC_FLAG_INITIALIZED))
|
|
if_printf(ifnet, "not initialized\n");
|
|
|
|
MAC_CHECK(check_ifnet_transmit, ifnet, &ifnet->if_label, mbuf,
|
|
&mbuf->m_pkthdr.label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_mount_stat(struct ucred *cred, struct mount *mount)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_mount_stat, cred, mount, &mount->mnt_mntlabel);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe, unsigned long cmd,
|
|
void *data)
|
|
{
|
|
int error;
|
|
|
|
PIPE_LOCK_ASSERT(pipe, MA_OWNED);
|
|
|
|
if (!mac_enforce_pipe)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_pipe_ioctl, cred, pipe, pipe->pipe_label, cmd, data);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_pipe_poll(struct ucred *cred, struct pipe *pipe)
|
|
{
|
|
int error;
|
|
|
|
PIPE_LOCK_ASSERT(pipe, MA_OWNED);
|
|
|
|
if (!mac_enforce_pipe)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_pipe_poll, cred, pipe, pipe->pipe_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_pipe_read(struct ucred *cred, struct pipe *pipe)
|
|
{
|
|
int error;
|
|
|
|
PIPE_LOCK_ASSERT(pipe, MA_OWNED);
|
|
|
|
if (!mac_enforce_pipe)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_pipe_read, cred, pipe, pipe->pipe_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_check_pipe_relabel(struct ucred *cred, struct pipe *pipe,
|
|
struct label *newlabel)
|
|
{
|
|
int error;
|
|
|
|
PIPE_LOCK_ASSERT(pipe, MA_OWNED);
|
|
|
|
if (!mac_enforce_pipe)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_pipe_relabel, cred, pipe, pipe->pipe_label, newlabel);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_pipe_stat(struct ucred *cred, struct pipe *pipe)
|
|
{
|
|
int error;
|
|
|
|
PIPE_LOCK_ASSERT(pipe, MA_OWNED);
|
|
|
|
if (!mac_enforce_pipe)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_pipe_stat, cred, pipe, pipe->pipe_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_pipe_write(struct ucred *cred, struct pipe *pipe)
|
|
{
|
|
int error;
|
|
|
|
PIPE_LOCK_ASSERT(pipe, MA_OWNED);
|
|
|
|
if (!mac_enforce_pipe)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_pipe_write, cred, pipe, pipe->pipe_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_proc_debug(struct ucred *cred, struct proc *proc)
|
|
{
|
|
int error;
|
|
|
|
PROC_LOCK_ASSERT(proc, MA_OWNED);
|
|
|
|
if (!mac_enforce_process)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_proc_debug, cred, proc);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_proc_sched(struct ucred *cred, struct proc *proc)
|
|
{
|
|
int error;
|
|
|
|
PROC_LOCK_ASSERT(proc, MA_OWNED);
|
|
|
|
if (!mac_enforce_process)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_proc_sched, cred, proc);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_proc_signal(struct ucred *cred, struct proc *proc, int signum)
|
|
{
|
|
int error;
|
|
|
|
PROC_LOCK_ASSERT(proc, MA_OWNED);
|
|
|
|
if (!mac_enforce_process)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_proc_signal, cred, proc, signum);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_bind(struct ucred *ucred, struct socket *socket,
|
|
struct sockaddr *sockaddr)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_bind, ucred, socket, &socket->so_label,
|
|
sockaddr);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_connect(struct ucred *cred, struct socket *socket,
|
|
struct sockaddr *sockaddr)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_connect, cred, socket, &socket->so_label,
|
|
sockaddr);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_deliver(struct socket *socket, struct mbuf *mbuf)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_deliver, socket, &socket->so_label, mbuf,
|
|
&mbuf->m_pkthdr.label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_listen(struct ucred *cred, struct socket *socket)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_listen, cred, socket, &socket->so_label);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_receive(struct ucred *cred, struct socket *so)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_receive, cred, so, &so->so_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_check_socket_relabel(struct ucred *cred, struct socket *socket,
|
|
struct label *newlabel)
|
|
{
|
|
int error;
|
|
|
|
MAC_CHECK(check_socket_relabel, cred, socket, &socket->so_label,
|
|
newlabel);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_send(struct ucred *cred, struct socket *so)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_send, cred, so, &so->so_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_visible(struct ucred *cred, struct socket *socket)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_visible, cred, socket, &socket->so_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_system_reboot(struct ucred *cred, int howto)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_system)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_system_reboot, cred, howto);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_system_swapon(struct ucred *cred, struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_system_swapon");
|
|
|
|
if (!mac_enforce_system)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_system_swapon, cred, vp, &vp->v_label);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_system_sysctl(struct ucred *cred, int *name, u_int namelen,
|
|
void *old, size_t *oldlenp, int inkernel, void *new, size_t newlen)
|
|
{
|
|
int error;
|
|
|
|
/*
|
|
* XXXMAC: We're very much like to assert the SYSCTL_LOCK here,
|
|
* but since it's not exported from kern_sysctl.c, we can't.
|
|
*/
|
|
if (!mac_enforce_system)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_system_sysctl, cred, name, namelen, old, oldlenp,
|
|
inkernel, new, newlen);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr,
|
|
struct ifnet *ifnet)
|
|
{
|
|
char *elements, *buffer;
|
|
struct mac mac;
|
|
int error;
|
|
|
|
error = copyin(ifr->ifr_ifru.ifru_data, &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
elements = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, elements, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(elements, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
|
|
error = mac_externalize_ifnet_label(&ifnet->if_label, elements,
|
|
buffer, mac.m_buflen, M_WAITOK);
|
|
if (error == 0)
|
|
error = copyout(buffer, mac.m_string, strlen(buffer)+1);
|
|
|
|
free(buffer, M_MACTEMP);
|
|
free(elements, M_MACTEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr,
|
|
struct ifnet *ifnet)
|
|
{
|
|
struct label intlabel;
|
|
struct mac mac;
|
|
char *buffer;
|
|
int error;
|
|
|
|
error = copyin(ifr->ifr_ifru.ifru_data, &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, buffer, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(buffer, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
mac_init_ifnet_label(&intlabel);
|
|
error = mac_internalize_ifnet_label(&intlabel, buffer);
|
|
free(buffer, M_MACTEMP);
|
|
if (error) {
|
|
mac_destroy_ifnet_label(&intlabel);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* XXX: Note that this is a redundant privilege check, since
|
|
* policies impose this check themselves if required by the
|
|
* policy. Eventually, this should go away.
|
|
*/
|
|
error = suser_cred(cred, 0);
|
|
if (error) {
|
|
mac_destroy_ifnet_label(&intlabel);
|
|
return (error);
|
|
}
|
|
|
|
MAC_CHECK(check_ifnet_relabel, cred, ifnet, &ifnet->if_label,
|
|
&intlabel);
|
|
if (error) {
|
|
mac_destroy_ifnet_label(&intlabel);
|
|
return (error);
|
|
}
|
|
|
|
MAC_PERFORM(relabel_ifnet, cred, ifnet, &ifnet->if_label, &intlabel);
|
|
|
|
mac_destroy_ifnet_label(&intlabel);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
mac_create_devfs_vnode(struct devfs_dirent *de, struct vnode *vp)
|
|
{
|
|
|
|
MAC_PERFORM(create_devfs_vnode, de, &de->de_label, vp, &vp->v_label);
|
|
}
|
|
|
|
void
|
|
mac_create_devfs_device(dev_t dev, struct devfs_dirent *de)
|
|
{
|
|
|
|
MAC_PERFORM(create_devfs_device, dev, de, &de->de_label);
|
|
}
|
|
|
|
void
|
|
mac_create_devfs_symlink(struct ucred *cred, struct devfs_dirent *dd,
|
|
struct devfs_dirent *de)
|
|
{
|
|
|
|
MAC_PERFORM(create_devfs_symlink, cred, dd, &dd->de_label, de,
|
|
&de->de_label);
|
|
}
|
|
|
|
void
|
|
mac_create_devfs_directory(char *dirname, int dirnamelen,
|
|
struct devfs_dirent *de)
|
|
{
|
|
|
|
MAC_PERFORM(create_devfs_directory, dirname, dirnamelen, de,
|
|
&de->de_label);
|
|
}
|
|
|
|
int
|
|
mac_setsockopt_label_set(struct ucred *cred, struct socket *so,
|
|
struct mac *mac)
|
|
{
|
|
struct label intlabel;
|
|
char *buffer;
|
|
int error;
|
|
|
|
error = mac_check_structmac_consistent(mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
buffer = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac->m_string, buffer, mac->m_buflen, NULL);
|
|
if (error) {
|
|
free(buffer, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
mac_init_socket_label(&intlabel, M_WAITOK);
|
|
error = mac_internalize_socket_label(&intlabel, buffer);
|
|
free(buffer, M_MACTEMP);
|
|
if (error) {
|
|
mac_destroy_socket_label(&intlabel);
|
|
return (error);
|
|
}
|
|
|
|
mac_check_socket_relabel(cred, so, &intlabel);
|
|
if (error) {
|
|
mac_destroy_socket_label(&intlabel);
|
|
return (error);
|
|
}
|
|
|
|
mac_relabel_socket(cred, so, &intlabel);
|
|
|
|
mac_destroy_socket_label(&intlabel);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
mac_pipe_label_set(struct ucred *cred, struct pipe *pipe, struct label *label)
|
|
{
|
|
int error;
|
|
|
|
PIPE_LOCK_ASSERT(pipe, MA_OWNED);
|
|
|
|
error = mac_check_pipe_relabel(cred, pipe, label);
|
|
if (error)
|
|
return (error);
|
|
|
|
mac_relabel_pipe(cred, pipe, label);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
mac_getsockopt_label_get(struct ucred *cred, struct socket *so,
|
|
struct mac *mac)
|
|
{
|
|
char *buffer, *elements;
|
|
int error;
|
|
|
|
error = mac_check_structmac_consistent(mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
elements = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac->m_string, elements, mac->m_buflen, NULL);
|
|
if (error) {
|
|
free(elements, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
buffer = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
|
|
error = mac_externalize_socket_label(&so->so_label, elements,
|
|
buffer, mac->m_buflen, M_WAITOK);
|
|
if (error == 0)
|
|
error = copyout(buffer, mac->m_string, strlen(buffer)+1);
|
|
|
|
free(buffer, M_MACTEMP);
|
|
free(elements, M_MACTEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_getsockopt_peerlabel_get(struct ucred *cred, struct socket *so,
|
|
struct mac *mac)
|
|
{
|
|
char *elements, *buffer;
|
|
int error;
|
|
|
|
error = mac_check_structmac_consistent(mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
elements = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac->m_string, elements, mac->m_buflen, NULL);
|
|
if (error) {
|
|
free(elements, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
buffer = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
|
|
error = mac_externalize_socket_peer_label(&so->so_peerlabel,
|
|
elements, buffer, mac->m_buflen, M_WAITOK);
|
|
if (error == 0)
|
|
error = copyout(buffer, mac->m_string, strlen(buffer)+1);
|
|
|
|
free(buffer, M_MACTEMP);
|
|
free(elements, M_MACTEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Implementation of VOP_SETLABEL() that relies on extended attributes
|
|
* to store label data. Can be referenced by filesystems supporting
|
|
* extended attributes.
|
|
*/
|
|
int
|
|
vop_stdsetlabel_ea(struct vop_setlabel_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct label *intlabel = ap->a_label;
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "vop_stdsetlabel_ea");
|
|
|
|
if ((vp->v_mount->mnt_flag & MNT_MULTILABEL) == 0)
|
|
return (EOPNOTSUPP);
|
|
|
|
error = mac_setlabel_vnode_extattr(ap->a_cred, vp, intlabel);
|
|
if (error)
|
|
return (error);
|
|
|
|
mac_relabel_vnode(ap->a_cred, vp, intlabel);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vn_setlabel(struct vnode *vp, struct label *intlabel, struct ucred *cred)
|
|
{
|
|
int error;
|
|
|
|
if (vp->v_mount == NULL) {
|
|
/* printf("vn_setlabel: null v_mount\n"); */
|
|
if (vp->v_type != VNON)
|
|
printf("vn_setlabel: null v_mount with non-VNON\n");
|
|
return (EBADF);
|
|
}
|
|
|
|
if ((vp->v_mount->mnt_flag & MNT_MULTILABEL) == 0)
|
|
return (EOPNOTSUPP);
|
|
|
|
/*
|
|
* Multi-phase commit. First check the policies to confirm the
|
|
* change is OK. Then commit via the filesystem. Finally,
|
|
* update the actual vnode label. Question: maybe the filesystem
|
|
* should update the vnode at the end as part of VOP_SETLABEL()?
|
|
*/
|
|
error = mac_check_vnode_relabel(cred, vp, intlabel);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* VADMIN provides the opportunity for the filesystem to make
|
|
* decisions about who is and is not able to modify labels
|
|
* and protections on files. This might not be right. We can't
|
|
* assume VOP_SETLABEL() will do it, because we might implement
|
|
* that as part of vop_stdsetlabel_ea().
|
|
*/
|
|
error = VOP_ACCESS(vp, VADMIN, cred, curthread);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = VOP_SETLABEL(vp, intlabel, cred, curthread);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
__mac_get_pid(struct thread *td, struct __mac_get_pid_args *uap)
|
|
{
|
|
char *elements, *buffer;
|
|
struct mac mac;
|
|
struct proc *tproc;
|
|
struct ucred *tcred;
|
|
int error;
|
|
|
|
error = copyin(SCARG(uap, mac_p), &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
tproc = pfind(uap->pid);
|
|
if (tproc == NULL)
|
|
return (ESRCH);
|
|
|
|
tcred = NULL; /* Satisfy gcc. */
|
|
error = p_cansee(td, tproc);
|
|
if (error == 0)
|
|
tcred = crhold(tproc->p_ucred);
|
|
PROC_UNLOCK(tproc);
|
|
if (error)
|
|
return (error);
|
|
|
|
elements = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, elements, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(elements, M_MACTEMP);
|
|
crfree(tcred);
|
|
return (error);
|
|
}
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
|
|
error = mac_externalize_cred_label(&tcred->cr_label, elements,
|
|
buffer, mac.m_buflen, M_WAITOK);
|
|
if (error == 0)
|
|
error = copyout(buffer, mac.m_string, strlen(buffer)+1);
|
|
|
|
free(buffer, M_MACTEMP);
|
|
free(elements, M_MACTEMP);
|
|
crfree(tcred);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
__mac_get_proc(struct thread *td, struct __mac_get_proc_args *uap)
|
|
{
|
|
char *elements, *buffer;
|
|
struct mac mac;
|
|
int error;
|
|
|
|
error = copyin(uap->mac_p, &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
elements = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, elements, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(elements, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
|
|
error = mac_externalize_cred_label(&td->td_ucred->cr_label,
|
|
elements, buffer, mac.m_buflen, M_WAITOK);
|
|
if (error == 0)
|
|
error = copyout(buffer, mac.m_string, strlen(buffer)+1);
|
|
|
|
free(buffer, M_MACTEMP);
|
|
free(elements, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
__mac_set_proc(struct thread *td, struct __mac_set_proc_args *uap)
|
|
{
|
|
struct ucred *newcred, *oldcred;
|
|
struct label intlabel;
|
|
struct proc *p;
|
|
struct mac mac;
|
|
char *buffer;
|
|
int error;
|
|
|
|
error = copyin(uap->mac_p, &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, buffer, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(buffer, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
mac_init_cred_label(&intlabel);
|
|
error = mac_internalize_cred_label(&intlabel, buffer);
|
|
free(buffer, M_MACTEMP);
|
|
if (error) {
|
|
mac_destroy_cred_label(&intlabel);
|
|
return (error);
|
|
}
|
|
|
|
newcred = crget();
|
|
|
|
p = td->td_proc;
|
|
PROC_LOCK(p);
|
|
oldcred = p->p_ucred;
|
|
|
|
error = mac_check_cred_relabel(oldcred, &intlabel);
|
|
if (error) {
|
|
PROC_UNLOCK(p);
|
|
crfree(newcred);
|
|
goto out;
|
|
}
|
|
|
|
setsugid(p);
|
|
crcopy(newcred, oldcred);
|
|
mac_relabel_cred(newcred, &intlabel);
|
|
p->p_ucred = newcred;
|
|
|
|
/*
|
|
* Grab additional reference for use while revoking mmaps, prior
|
|
* to releasing the proc lock and sharing the cred.
|
|
*/
|
|
crhold(newcred);
|
|
PROC_UNLOCK(p);
|
|
|
|
if (mac_enforce_vm) {
|
|
mtx_lock(&Giant);
|
|
mac_cred_mmapped_drop_perms(td, newcred);
|
|
mtx_unlock(&Giant);
|
|
}
|
|
|
|
crfree(newcred); /* Free revocation reference. */
|
|
crfree(oldcred);
|
|
|
|
out:
|
|
mac_destroy_cred_label(&intlabel);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
__mac_get_fd(struct thread *td, struct __mac_get_fd_args *uap)
|
|
{
|
|
char *elements, *buffer;
|
|
struct label intlabel;
|
|
struct file *fp;
|
|
struct mac mac;
|
|
struct vnode *vp;
|
|
struct pipe *pipe;
|
|
short label_type;
|
|
int error;
|
|
|
|
error = copyin(uap->mac_p, &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
elements = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, elements, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(elements, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
|
|
mtx_lock(&Giant); /* VFS */
|
|
error = fget(td, SCARG(uap, fd), &fp);
|
|
if (error)
|
|
goto out;
|
|
|
|
label_type = fp->f_type;
|
|
switch (fp->f_type) {
|
|
case DTYPE_FIFO:
|
|
case DTYPE_VNODE:
|
|
vp = (struct vnode *)fp->f_data;
|
|
|
|
mac_init_vnode_label(&intlabel);
|
|
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
mac_copy_vnode_label(&vp->v_label, &intlabel);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
|
|
break;
|
|
case DTYPE_PIPE:
|
|
pipe = (struct pipe *)fp->f_data;
|
|
|
|
mac_init_pipe_label(&intlabel);
|
|
|
|
PIPE_LOCK(pipe);
|
|
mac_copy_pipe_label(pipe->pipe_label, &intlabel);
|
|
PIPE_UNLOCK(pipe);
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
fdrop(fp, td);
|
|
goto out;
|
|
}
|
|
fdrop(fp, td);
|
|
|
|
switch (label_type) {
|
|
case DTYPE_FIFO:
|
|
case DTYPE_VNODE:
|
|
if (error == 0)
|
|
error = mac_externalize_vnode_label(&intlabel,
|
|
elements, buffer, mac.m_buflen, M_WAITOK);
|
|
mac_destroy_vnode_label(&intlabel);
|
|
break;
|
|
case DTYPE_PIPE:
|
|
error = mac_externalize_pipe_label(&intlabel, elements,
|
|
buffer, mac.m_buflen, M_WAITOK);
|
|
mac_destroy_pipe_label(&intlabel);
|
|
break;
|
|
default:
|
|
panic("__mac_get_fd: corrupted label_type");
|
|
}
|
|
|
|
if (error == 0)
|
|
error = copyout(buffer, mac.m_string, strlen(buffer)+1);
|
|
|
|
out:
|
|
mtx_unlock(&Giant); /* VFS */
|
|
free(buffer, M_MACTEMP);
|
|
free(elements, M_MACTEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
__mac_get_file(struct thread *td, struct __mac_get_file_args *uap)
|
|
{
|
|
char *elements, *buffer;
|
|
struct nameidata nd;
|
|
struct label intlabel;
|
|
struct mac mac;
|
|
int error;
|
|
|
|
error = copyin(uap->mac_p, &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
elements = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, elements, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(elements, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
|
|
mtx_lock(&Giant); /* VFS */
|
|
NDINIT(&nd, LOOKUP, LOCKLEAF | FOLLOW, UIO_USERSPACE, uap->path_p,
|
|
td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
goto out;
|
|
|
|
mac_init_vnode_label(&intlabel);
|
|
mac_copy_vnode_label(&nd.ni_vp->v_label, &intlabel);
|
|
error = mac_externalize_vnode_label(&intlabel, elements, buffer,
|
|
mac.m_buflen, M_WAITOK);
|
|
|
|
NDFREE(&nd, 0);
|
|
mac_destroy_vnode_label(&intlabel);
|
|
|
|
if (error == 0)
|
|
error = copyout(buffer, mac.m_string, strlen(buffer)+1);
|
|
|
|
out:
|
|
mtx_unlock(&Giant); /* VFS */
|
|
|
|
free(buffer, M_MACTEMP);
|
|
free(elements, M_MACTEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
__mac_get_link(struct thread *td, struct __mac_get_link_args *uap)
|
|
{
|
|
char *elements, *buffer;
|
|
struct nameidata nd;
|
|
struct label intlabel;
|
|
struct mac mac;
|
|
int error;
|
|
|
|
error = copyin(uap->mac_p, &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
elements = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, elements, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(elements, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
|
|
mtx_lock(&Giant); /* VFS */
|
|
NDINIT(&nd, LOOKUP, LOCKLEAF | NOFOLLOW, UIO_USERSPACE, uap->path_p,
|
|
td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
goto out;
|
|
|
|
mac_init_vnode_label(&intlabel);
|
|
mac_copy_vnode_label(&nd.ni_vp->v_label, &intlabel);
|
|
error = mac_externalize_vnode_label(&intlabel, elements, buffer,
|
|
mac.m_buflen, M_WAITOK);
|
|
NDFREE(&nd, 0);
|
|
mac_destroy_vnode_label(&intlabel);
|
|
|
|
if (error == 0)
|
|
error = copyout(buffer, mac.m_string, strlen(buffer)+1);
|
|
|
|
out:
|
|
mtx_unlock(&Giant); /* VFS */
|
|
|
|
free(buffer, M_MACTEMP);
|
|
free(elements, M_MACTEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
__mac_set_fd(struct thread *td, struct __mac_set_fd_args *uap)
|
|
{
|
|
struct label intlabel;
|
|
struct pipe *pipe;
|
|
struct file *fp;
|
|
struct mount *mp;
|
|
struct vnode *vp;
|
|
struct mac mac;
|
|
char *buffer;
|
|
int error;
|
|
|
|
error = copyin(uap->mac_p, &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, buffer, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(buffer, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
mtx_lock(&Giant); /* VFS */
|
|
|
|
error = fget(td, SCARG(uap, fd), &fp);
|
|
if (error)
|
|
goto out;
|
|
|
|
switch (fp->f_type) {
|
|
case DTYPE_FIFO:
|
|
case DTYPE_VNODE:
|
|
mac_init_vnode_label(&intlabel);
|
|
error = mac_internalize_vnode_label(&intlabel, buffer);
|
|
if (error) {
|
|
mac_destroy_vnode_label(&intlabel);
|
|
break;
|
|
}
|
|
|
|
vp = (struct vnode *)fp->f_data;
|
|
error = vn_start_write(vp, &mp, V_WAIT | PCATCH);
|
|
if (error != 0) {
|
|
mac_destroy_vnode_label(&intlabel);
|
|
break;
|
|
}
|
|
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
error = vn_setlabel(vp, &intlabel, td->td_ucred);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vn_finished_write(mp);
|
|
|
|
mac_destroy_vnode_label(&intlabel);
|
|
break;
|
|
|
|
case DTYPE_PIPE:
|
|
mac_init_pipe_label(&intlabel);
|
|
error = mac_internalize_pipe_label(&intlabel, buffer);
|
|
if (error == 0) {
|
|
pipe = (struct pipe *)fp->f_data;
|
|
PIPE_LOCK(pipe);
|
|
error = mac_pipe_label_set(td->td_ucred, pipe,
|
|
&intlabel);
|
|
PIPE_UNLOCK(pipe);
|
|
}
|
|
|
|
mac_destroy_pipe_label(&intlabel);
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
}
|
|
|
|
fdrop(fp, td);
|
|
out:
|
|
mtx_unlock(&Giant); /* VFS */
|
|
|
|
free(buffer, M_MACTEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
__mac_set_file(struct thread *td, struct __mac_set_file_args *uap)
|
|
{
|
|
struct label intlabel;
|
|
struct nameidata nd;
|
|
struct mount *mp;
|
|
struct mac mac;
|
|
char *buffer;
|
|
int error;
|
|
|
|
error = copyin(uap->mac_p, &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, buffer, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(buffer, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
mac_init_vnode_label(&intlabel);
|
|
error = mac_internalize_vnode_label(&intlabel, buffer);
|
|
free(buffer, M_MACTEMP);
|
|
if (error) {
|
|
mac_destroy_vnode_label(&intlabel);
|
|
return (error);
|
|
}
|
|
|
|
mtx_lock(&Giant); /* VFS */
|
|
|
|
NDINIT(&nd, LOOKUP, LOCKLEAF | FOLLOW, UIO_USERSPACE, uap->path_p,
|
|
td);
|
|
error = namei(&nd);
|
|
if (error == 0) {
|
|
error = vn_start_write(nd.ni_vp, &mp, V_WAIT | PCATCH);
|
|
if (error == 0)
|
|
error = vn_setlabel(nd.ni_vp, &intlabel,
|
|
td->td_ucred);
|
|
vn_finished_write(mp);
|
|
}
|
|
|
|
NDFREE(&nd, 0);
|
|
mtx_unlock(&Giant); /* VFS */
|
|
mac_destroy_vnode_label(&intlabel);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
__mac_set_link(struct thread *td, struct __mac_set_link_args *uap)
|
|
{
|
|
struct label intlabel;
|
|
struct nameidata nd;
|
|
struct mount *mp;
|
|
struct mac mac;
|
|
char *buffer;
|
|
int error;
|
|
|
|
error = copyin(uap->mac_p, &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, buffer, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(buffer, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
mac_init_vnode_label(&intlabel);
|
|
error = mac_internalize_vnode_label(&intlabel, buffer);
|
|
free(buffer, M_MACTEMP);
|
|
if (error) {
|
|
mac_destroy_vnode_label(&intlabel);
|
|
return (error);
|
|
}
|
|
|
|
mtx_lock(&Giant); /* VFS */
|
|
|
|
NDINIT(&nd, LOOKUP, LOCKLEAF | NOFOLLOW, UIO_USERSPACE, uap->path_p,
|
|
td);
|
|
error = namei(&nd);
|
|
if (error == 0) {
|
|
error = vn_start_write(nd.ni_vp, &mp, V_WAIT | PCATCH);
|
|
if (error == 0)
|
|
error = vn_setlabel(nd.ni_vp, &intlabel,
|
|
td->td_ucred);
|
|
vn_finished_write(mp);
|
|
}
|
|
|
|
NDFREE(&nd, 0);
|
|
mtx_unlock(&Giant); /* VFS */
|
|
mac_destroy_vnode_label(&intlabel);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
mac_syscall(struct thread *td, struct mac_syscall_args *uap)
|
|
{
|
|
struct mac_policy_conf *mpc;
|
|
char target[MAC_MAX_POLICY_NAME];
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, policy), target, sizeof(target), NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = ENOSYS;
|
|
MAC_POLICY_LIST_BUSY();
|
|
LIST_FOREACH(mpc, &mac_policy_list, mpc_list) {
|
|
if (strcmp(mpc->mpc_name, target) == 0 &&
|
|
mpc->mpc_ops->mpo_syscall != NULL) {
|
|
error = mpc->mpc_ops->mpo_syscall(td,
|
|
SCARG(uap, call), SCARG(uap, arg));
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
out:
|
|
MAC_POLICY_LIST_UNBUSY();
|
|
return (error);
|
|
}
|
|
|
|
SYSINIT(mac, SI_SUB_MAC, SI_ORDER_FIRST, mac_init, NULL);
|
|
SYSINIT(mac_late, SI_SUB_MAC_LATE, SI_ORDER_FIRST, mac_late_init, NULL);
|
|
|
|
#else /* !MAC */
|
|
|
|
int
|
|
__mac_get_pid(struct thread *td, struct __mac_get_pid_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
__mac_get_proc(struct thread *td, struct __mac_get_proc_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
__mac_set_proc(struct thread *td, struct __mac_set_proc_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
__mac_get_fd(struct thread *td, struct __mac_get_fd_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
__mac_get_file(struct thread *td, struct __mac_get_file_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
__mac_get_link(struct thread *td, struct __mac_get_link_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
__mac_set_fd(struct thread *td, struct __mac_set_fd_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
__mac_set_file(struct thread *td, struct __mac_set_file_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
__mac_set_link(struct thread *td, struct __mac_set_link_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
mac_syscall(struct thread *td, struct mac_syscall_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
#endif
|