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authorrwatson <rwatson@FreeBSD.org>2003-10-22 20:09:12 +0000
committerrwatson <rwatson@FreeBSD.org>2003-10-22 20:09:12 +0000
commitea8fde8275138012a6441f05a35f153871769c62 (patch)
treef42f92e6b03f51083871a294f3f8e83be3411377 /sys/security
parent99a9310ddf3991a90a4d3e7a5d1a201897c5ab44 (diff)
downloadFreeBSD-src-ea8fde8275138012a6441f05a35f153871769c62.zip
FreeBSD-src-ea8fde8275138012a6441f05a35f153871769c62.tar.gz
Remove non-system bits from mac_system.c. Leave:
Enforce_kld, enforce_system access control toggles. Access control checks for: kenv operation, kld operations, sysarch_ioperm(), acct(), nfsd(), reboot(), settime(), swapon(), swapoff(), sysctl(). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
Diffstat (limited to 'sys/security')
-rw-r--r--sys/security/mac/mac_system.c3694
1 files changed, 2 insertions, 3692 deletions
diff --git a/sys/security/mac/mac_system.c b/sys/security/mac/mac_system.c
index db3ade9..e5041a2 100644
--- a/sys/security/mac/mac_system.c
+++ b/sys/security/mac/mac_system.c
@@ -1,12 +1,7 @@
/*-
- * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
- * Copyright (c) 2001 Ilmar S. Habibulin
- * Copyright (c) 2001, 2002, 2003 Networks Associates Technology, Inc.
+ * Copyright (c) 2002, 2003 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 Network
* Associates Laboratories, the Security Research Division of Network
* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
@@ -34,2482 +29,35 @@
* SUCH DAMAGE.
*/
-/*
- * Framework for extensible kernel access control. Kernel and userland
- * interface to the framework, policy registration and composition.
- */
-
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_mac.h"
-#include "opt_devfs.h"
#include <sys/param.h>
-#include <sys/condvar.h>
-#include <sys/extattr.h>
-#include <sys/imgact.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/sbuf.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_SLOTS > 32
-#error "MAC_MAX_SLOTS too large"
-#endif
-
-static unsigned int mac_max_slots = MAC_MAX_SLOTS;
-static unsigned int mac_slot_offsets_free = (1 << MAC_MAX_SLOTS) - 1;
-SYSCTL_UINT(_security_mac, OID_AUTO, max_slots, CTLFLAG_RD,
- &mac_max_slots, 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;
-
-/*
- * Flag to indicate whether or not we should allocate label storage for
- * new mbufs. Since most dynamic policies we currently work with don't
- * rely on mbuf labeling, try to avoid paying the cost of mtag allocation
- * unless specifically notified of interest. One result of this is
- * that if a dynamically loaded policy requests mbuf labels, it must
- * be able to deal with a NULL label being returned on any mbufs that
- * were already in flight when the policy was loaded. Since the policy
- * already has to deal with uninitialized labels, this probably won't
- * be a problem. Note: currently no locking. Will this be a problem?
- */
-#ifndef MAC_ALWAYS_LABEL_MBUF
-static int mac_labelmbufs = 0;
-#endif
-
-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);
+#include <security/mac/mac_internal.h>
static int mac_enforce_kld = 1;
SYSCTL_INT(_security_mac, OID_AUTO, enforce_kld, CTLFLAG_RW,
&mac_enforce_kld, 0, "Enforce MAC policy on kld operations");
TUNABLE_INT("security.mac.enforce_kld", &mac_enforce_kld);
-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_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, nmacprocs;
-
-#define MAC_DEBUG_COUNTER_INC(x) atomic_add_int(x, 1);
-#define MAC_DEBUG_COUNTER_DEC(x) atomic_subtract_int(x, 1);
-
-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, procs, CTLFLAG_RD,
- &nmacprocs, 0, "number of procs 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");
-#else
-#define MAC_DEBUG_COUNTER_INC(x)
-#define MAC_DEBUG_COUNTER_DEC(x)
-#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_MACPIPELABEL, "macpipelabel", "MAC labels for pipes");
-MALLOC_DEFINE(M_MACTEMP, "mactemp", "MAC temporary label storage");
-
-/*
- * mac_static_policy_list holds a list of policy modules that are not
- * loaded while the system is "live", and cannot be unloaded. These
- * policies can be invoked without holding the busy count.
- *
- * mac_policy_list stores the list of dynamic policies. A busy count is
- * maintained for the list, stored in mac_policy_busy. The busy count
- * is protected by mac_policy_mtx; the list may be modified only
- * while the busy count is 0, requiring that the lock be held to
- * prevent new references to the list from being acquired. For almost
- * all operations, incrementing the busy count is sufficient to
- * guarantee consistency, as the list cannot be modified while the
- * busy count is elevated. For a few special operations involving a
- * change to the list of active policies, the mtx itself must be held.
- * A condition variable, mac_policy_cv, is used to signal potential
- * exclusive consumers that they should try to acquire the lock if a
- * first attempt at exclusive access fails.
- */
-static struct mtx mac_policy_mtx;
-static struct cv mac_policy_cv;
-static int mac_policy_count;
-static LIST_HEAD(, mac_policy_conf) mac_policy_list;
-static LIST_HEAD(, mac_policy_conf) mac_static_policy_list;
-
-/*
- * We manually invoke WITNESS_WARN() to allow Witness to generate
- * warnings even if we don't end up ever triggering the wait at
- * run-time. The consumer of the exclusive interface must not hold
- * any locks (other than potentially Giant) since we may sleep for
- * long (potentially indefinite) periods of time waiting for the
- * framework to become quiescent so that a policy list change may
- * be made.
- */
-static __inline void
-mac_policy_grab_exclusive(void)
-{
- WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
- "mac_policy_grab_exclusive() at %s:%d", __FILE__, __LINE__);
- mtx_lock(&mac_policy_mtx);
- while (mac_policy_count != 0)
- cv_wait(&mac_policy_cv, &mac_policy_mtx);
-}
-
-static __inline void
-mac_policy_assert_exclusive(void)
-{
- mtx_assert(&mac_policy_mtx, MA_OWNED);
- KASSERT(mac_policy_count == 0,
- ("mac_policy_assert_exclusive(): not exclusive"));
-}
-
-static __inline void
-mac_policy_release_exclusive(void)
-{
-
- KASSERT(mac_policy_count == 0,
- ("mac_policy_release_exclusive(): not exclusive"));
- mtx_unlock(&mac_policy_mtx);
- cv_signal(&mac_policy_cv);
-}
-
-static __inline void
-mac_policy_list_busy(void)
-{
- mtx_lock(&mac_policy_mtx);
- mac_policy_count++;
- mtx_unlock(&mac_policy_mtx);
-}
-
-static __inline int
-mac_policy_list_conditional_busy(void)
-{
- int ret;
-
- mtx_lock(&mac_policy_mtx);
- if (!LIST_EMPTY(&mac_policy_list)) {
- mac_policy_count++;
- ret = 1;
- } else
- ret = 0;
- mtx_unlock(&mac_policy_mtx);
- return (ret);
-}
-
-static __inline void
-mac_policy_list_unbusy(void)
-{
- mtx_lock(&mac_policy_mtx);
- mac_policy_count--;
- KASSERT(mac_policy_count >= 0, ("MAC_POLICY_LIST_LOCK"));
- if (mac_policy_count == 0)
- cv_signal(&mac_policy_cv);
- mtx_unlock(&mac_policy_mtx);
-}
-
-/*
- * 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; \
- int entrycount; \
- \
- error = 0; \
- LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) { \
- if (mpc->mpc_ops->mpo_ ## check != NULL) \
- error = error_select( \
- mpc->mpc_ops->mpo_ ## check (args), \
- error); \
- } \
- if ((entrycount = mac_policy_list_conditional_busy()) != 0) { \
- 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; \
- int entrycount; \
- \
- LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) { \
- if (mpc->mpc_ops->mpo_ ## operation != NULL) \
- result = result composition \
- mpc->mpc_ops->mpo_ ## operation (args); \
- } \
- if ((entrycount = mac_policy_list_conditional_busy()) != 0) { \
- 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 { \
- int claimed, first, ignorenotfound, savedlen; \
- char *element_name, *element_temp; \
- struct sbuf sb; \
- \
- error = 0; \
- first = 1; \
- sbuf_new(&sb, outbuf, outbuflen, SBUF_FIXEDLEN); \
- element_temp = elementlist; \
- while ((element_name = strsep(&element_temp, ",")) != NULL) { \
- if (element_name[0] == '?') { \
- element_name++; \
- ignorenotfound = 1; \
- } else \
- ignorenotfound = 0; \
- savedlen = sbuf_len(&sb); \
- if (first) { \
- error = sbuf_printf(&sb, "%s/", element_name); \
- first = 0; \
- } else \
- error = sbuf_printf(&sb, ",%s/", element_name); \
- if (error == -1) { \
- error = EINVAL; /* XXX: E2BIG? */ \
- break; \
- } \
- claimed = 0; \
- MAC_CHECK(externalize_ ## type, label, element_name, \
- &sb, &claimed); \
- if (error) \
- break; \
- if (claimed == 0 && ignorenotfound) { \
- /* Revert last label name. */ \
- sbuf_setpos(&sb, savedlen); \
- } else if (claimed != 1) { \
- error = EINVAL; /* XXX: ENOLABEL? */ \
- break; \
- } \
- } \
- sbuf_finish(&sb); \
-} 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; \
- int entrycount; \
- \
- LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) { \
- if (mpc->mpc_ops->mpo_ ## operation != NULL) \
- mpc->mpc_ops->mpo_ ## operation (args); \
- } \
- if ((entrycount = mac_policy_list_conditional_busy()) != 0) { \
- 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_static_policy_list);
- LIST_INIT(&mac_policy_list);
-
- mtx_init(&mac_policy_mtx, "mac_policy_mtx", NULL, MTX_DEF);
- cv_init(&mac_policy_cv, "mac_policy_cv");
-}
-
-/*
- * 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;
-}
-
-/*
- * After the policy list has changed, walk the list to update any global
- * flags. Currently, we support only one flag, and it's conditionally
- * defined; as a result, the entire function is conditional. Eventually,
- * the #else case might also iterate across the policies.
- */
-static void
-mac_policy_updateflags(void)
-{
-#ifndef MAC_ALWAYS_LABEL_MBUF
- struct mac_policy_conf *tmpc;
- int labelmbufs;
-
- mac_policy_assert_exclusive();
-
- labelmbufs = 0;
- LIST_FOREACH(tmpc, &mac_static_policy_list, mpc_list) {
- if (tmpc->mpc_loadtime_flags & MPC_LOADTIME_FLAG_LABELMBUFS)
- labelmbufs++;
- }
- LIST_FOREACH(tmpc, &mac_policy_list, mpc_list) {
- if (tmpc->mpc_loadtime_flags & MPC_LOADTIME_FLAG_LABELMBUFS)
- labelmbufs++;
- }
- mac_labelmbufs = (labelmbufs != 0);
-#endif
-}
-
-/*
- * 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 error, slot, static_entry;
-
- error = 0;
-
- /*
- * We don't technically need exclusive access while !mac_late,
- * but hold it for assertion consistency.
- */
- mac_policy_grab_exclusive();
-
- /*
- * If the module can potentially be unloaded, or we're loading
- * late, we have to stick it in the non-static list and pay
- * an extra performance overhead. Otherwise, we can pay a
- * light locking cost and stick it in the static list.
- */
- static_entry = (!mac_late &&
- !(mpc->mpc_loadtime_flags & MPC_LOADTIME_FLAG_UNLOADOK));
-
- if (static_entry) {
- LIST_FOREACH(tmpc, &mac_static_policy_list, mpc_list) {
- if (strcmp(tmpc->mpc_name, mpc->mpc_name) == 0) {
- error = EEXIST;
- goto out;
- }
- }
- } else {
- LIST_FOREACH(tmpc, &mac_policy_list, mpc_list) {
- if (strcmp(tmpc->mpc_name, mpc->mpc_name) == 0) {
- error = EEXIST;
- goto out;
- }
- }
- }
- if (mpc->mpc_field_off != NULL) {
- slot = ffs(mac_slot_offsets_free);
- if (slot == 0) {
- error = ENOMEM;
- goto out;
- }
- slot--;
- mac_slot_offsets_free &= ~(1 << slot);
- *mpc->mpc_field_off = slot;
- }
- mpc->mpc_runtime_flags |= MPC_RUNTIME_FLAG_REGISTERED;
-
- /*
- * If we're loading a MAC module after the framework has
- * initialized, it has to go into the dynamic list. If
- * we're loading it before we've finished initializing,
- * it can go into the static list with weaker locker
- * requirements.
- */
- if (static_entry)
- LIST_INSERT_HEAD(&mac_static_policy_list, mpc, mpc_list);
- else
- 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_updateflags();
-
- printf("Security policy loaded: %s (%s)\n", mpc->mpc_fullname,
- mpc->mpc_name);
-
-out:
- mac_policy_release_exclusive();
- return (error);
-}
-
-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_grab_exclusive();
- if ((mpc->mpc_runtime_flags & MPC_RUNTIME_FLAG_REGISTERED) == 0) {
- mac_policy_release_exclusive();
- 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_release_exclusive();
- return (EBUSY);
- }
- if (mpc->mpc_ops->mpo_destroy != NULL)
- (*(mpc->mpc_ops->mpo_destroy))(mpc);
-
- LIST_REMOVE(mpc, mpc_list);
- mpc->mpc_runtime_flags &= ~MPC_RUNTIME_FLAG_REGISTERED;
- mac_policy_updateflags();
-
- mac_policy_release_exclusive();
-
- 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 struct label *
-mbuf_to_label(struct mbuf *mbuf)
-{
- struct m_tag *tag;
- struct label *label;
-
- tag = m_tag_find(mbuf, PACKET_TAG_MACLABEL, NULL);
- label = (struct label *)(tag+1);
-
- return (label);
-}
-
-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);
- MAC_DEBUG_COUNTER_INC(&nmacbpfdescs);
-}
-
-static void
-mac_init_cred_label(struct label *label)
-{
-
- mac_init_label(label);
- MAC_PERFORM(init_cred_label, label);
- MAC_DEBUG_COUNTER_INC(&nmaccreds);
-}
-
-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);
- MAC_DEBUG_COUNTER_INC(&nmacdevfsdirents);
-}
-
-static void
-mac_init_ifnet_label(struct label *label)
-{
-
- mac_init_label(label);
- MAC_PERFORM(init_ifnet_label, label);
- MAC_DEBUG_COUNTER_INC(&nmacifnets);
-}
-
-void
-mac_init_ifnet(struct ifnet *ifp)
-{
-
- mac_init_ifnet_label(&ifp->if_label);
-}
-
-int
-mac_init_ipq(struct ipq *ipq, int flag)
-{
- int error;
-
- mac_init_label(&ipq->ipq_label);
-
- MAC_CHECK(init_ipq_label, &ipq->ipq_label, flag);
- if (error) {
- MAC_PERFORM(destroy_ipq_label, &ipq->ipq_label);
- mac_destroy_label(&ipq->ipq_label);
- } else {
- MAC_DEBUG_COUNTER_INC(&nmacipqs);
- }
- return (error);
-}
-
-int
-mac_init_mbuf_tag(struct m_tag *tag, int flag)
-{
- struct label *label;
- int error;
-
- label = (struct label *) (tag + 1);
- mac_init_label(label);
-
- MAC_CHECK(init_mbuf_label, label, flag);
- if (error) {
- MAC_PERFORM(destroy_mbuf_label, label);
- mac_destroy_label(label);
- } else {
- MAC_DEBUG_COUNTER_INC(&nmacmbufs);
- }
- return (error);
-}
-
-int
-mac_init_mbuf(struct mbuf *m, int flag)
-{
- struct m_tag *tag;
- int error;
-
- M_ASSERTPKTHDR(m);
-
-#ifndef MAC_ALWAYS_LABEL_MBUF
- /*
- * If conditionally allocating mbuf labels, don't allocate unless
- * they are required.
- */
- if (!mac_labelmbufs)
- return (0);
-#endif
- tag = m_tag_get(PACKET_TAG_MACLABEL, sizeof(struct label),
- flag);
- if (tag == NULL)
- return (ENOMEM);
- error = mac_init_mbuf_tag(tag, flag);
- if (error) {
- m_tag_free(tag);
- return (error);
- }
- m_tag_prepend(m, tag);
- return (0);
-}
-
-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);
- MAC_DEBUG_COUNTER_INC(&nmacmounts);
-}
-
-static void
-mac_init_pipe_label(struct label *label)
-{
-
- mac_init_label(label);
- MAC_PERFORM(init_pipe_label, label);
- MAC_DEBUG_COUNTER_INC(&nmacpipes);
-}
-
-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);
-}
-
-void
-mac_init_proc(struct proc *p)
-{
-
- mac_init_label(&p->p_label);
- MAC_PERFORM(init_proc_label, &p->p_label);
- MAC_DEBUG_COUNTER_INC(&nmacprocs);
-}
-
-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);
- } else {
- MAC_DEBUG_COUNTER_INC(&nmacsockets);
- }
-
- 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);
- MAC_DEBUG_COUNTER_INC(&nmacvnodes);
-}
-
-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);
- MAC_DEBUG_COUNTER_DEC(&nmacbpfdescs);
-}
-
-static void
-mac_destroy_cred_label(struct label *label)
-{
-
- MAC_PERFORM(destroy_cred_label, label);
- mac_destroy_label(label);
- MAC_DEBUG_COUNTER_DEC(&nmaccreds);
-}
-
-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);
- MAC_DEBUG_COUNTER_DEC(&nmacdevfsdirents);
-}
-
-static void
-mac_destroy_ifnet_label(struct label *label)
-{
-
- MAC_PERFORM(destroy_ifnet_label, label);
- mac_destroy_label(label);
- MAC_DEBUG_COUNTER_DEC(&nmacifnets);
-}
-
-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);
- MAC_DEBUG_COUNTER_DEC(&nmacipqs);
-}
-
-void
-mac_destroy_mbuf_tag(struct m_tag *tag)
-{
- struct label *label;
-
- label = (struct label *)(tag+1);
-
- MAC_PERFORM(destroy_mbuf_label, label);
- mac_destroy_label(label);
- MAC_DEBUG_COUNTER_DEC(&nmacmbufs);
-}
-
-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);
- MAC_DEBUG_COUNTER_DEC(&nmacmounts);
-}
-
-static void
-mac_destroy_pipe_label(struct label *label)
-{
-
- MAC_PERFORM(destroy_pipe_label, label);
- mac_destroy_label(label);
- MAC_DEBUG_COUNTER_DEC(&nmacpipes);
-}
-
-void
-mac_destroy_pipe(struct pipe *pipe)
-{
-
- mac_destroy_pipe_label(pipe->pipe_label);
- free(pipe->pipe_label, M_MACPIPELABEL);
-}
-
-void
-mac_destroy_proc(struct proc *p)
-{
-
- MAC_PERFORM(destroy_proc_label, &p->p_label);
- mac_destroy_label(&p->p_label);
- MAC_DEBUG_COUNTER_DEC(&nmacprocs);
-}
-
-static void
-mac_destroy_socket_label(struct label *label)
-{
-
- MAC_PERFORM(destroy_socket_label, label);
- mac_destroy_label(label);
- MAC_DEBUG_COUNTER_DEC(&nmacsockets);
-}
-
-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);
- MAC_DEBUG_COUNTER_DEC(&nmacvnodes);
-}
-
-void
-mac_destroy_vnode(struct vnode *vp)
-{
-
- mac_destroy_vnode_label(&vp->v_label);
-}
-
-void
-mac_copy_mbuf_tag(struct m_tag *src, struct m_tag *dest)
-{
- struct label *src_label, *dest_label;
-
- src_label = (struct label *)(src+1);
- dest_label = (struct label *)(dest+1);
-
- /*
- * mac_init_mbuf_tag() is called on the target tag in
- * m_tag_copy(), so we don't need to call it here.
- */
- MAC_PERFORM(copy_mbuf_label, src_label, dest_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 < 0 ||
- 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 mount *mp, struct devfs_dirent *de,
- struct vnode *vp)
-{
-
- MAC_PERFORM(update_devfsdirent, mp, 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);
-}
-
-int
-mac_execve_enter(struct image_params *imgp, struct mac *mac_p,
- struct label *execlabelstorage)
-{
- struct mac mac;
- char *buffer;
- int error;
-
- if (mac_p == NULL)
- return (0);
-
- error = copyin(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(execlabelstorage);
- error = mac_internalize_cred_label(execlabelstorage, buffer);
- free(buffer, M_MACTEMP);
- if (error) {
- mac_destroy_cred_label(execlabelstorage);
- return (error);
- }
- imgp->execlabel = execlabelstorage;
- return (0);
-}
-
-void
-mac_execve_exit(struct image_params *imgp)
-{
- if (imgp->execlabel != NULL)
- mac_destroy_cred_label(imgp->execlabel);
-}
-
-void
-mac_execve_transition(struct ucred *old, struct ucred *new, struct vnode *vp,
- struct label *interpvnodelabel, struct image_params *imgp)
-{
-
- ASSERT_VOP_LOCKED(vp, "mac_execve_transition");
-
- if (!mac_enforce_process && !mac_enforce_fs)
- return;
-
- MAC_PERFORM(execve_transition, old, new, vp, &vp->v_label,
- interpvnodelabel, imgp, imgp->execlabel);
-}
-
-int
-mac_execve_will_transition(struct ucred *old, struct vnode *vp,
- struct label *interpvnodelabel, struct image_params *imgp)
-{
- int result;
-
- ASSERT_VOP_LOCKED(vp, "mac_execve_will_transition");
-
- if (!mac_enforce_process && !mac_enforce_fs)
- return (0);
-
- result = 0;
- MAC_BOOLEAN(execve_will_transition, ||, old, vp, &vp->v_label,
- interpvnodelabel, imgp, imgp->execlabel);
-
- 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_deleteextattr(struct ucred *cred, struct vnode *vp,
- int attrnamespace, const char *name)
-{
- int error;
-
- ASSERT_VOP_LOCKED(vp, "mac_check_vnode_deleteextattr");
-
- if (!mac_enforce_fs)
- return (0);
-
- MAC_CHECK(check_vnode_deleteextattr, cred, vp, &vp->v_label,
- attrnamespace, name);
- return (error);
-}
-
-int
-mac_check_vnode_exec(struct ucred *cred, struct vnode *vp,
- struct image_params *imgp)
-{
- 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, imgp,
- imgp->execlabel);
-
- 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_listextattr(struct ucred *cred, struct vnode *vp,
- int attrnamespace)
-{
- int error;
-
- ASSERT_VOP_LOCKED(vp, "mac_check_vnode_listextattr");
-
- if (!mac_enforce_fs)
- return (0);
-
- MAC_CHECK(check_vnode_listextattr, cred, vp, &vp->v_label,
- attrnamespace);
- 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.
- */
-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_LOCK(object);
- vm_object_page_clean(object,
- OFF_TO_IDX(offset),
- OFF_TO_IDX(offset + vme->end - vme->start +
- PAGE_MASK),
- OBJPC_SYNC);
- VM_OBJECT_UNLOCK(object);
- 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)
-{
- struct label *label;
-
- label = mbuf_to_label(mbuf);
-
- MAC_PERFORM(set_socket_peer_from_mbuf, mbuf, 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)
-{
- struct label *label;
-
- label = mbuf_to_label(datagram);
-
- MAC_PERFORM(create_datagram_from_ipq, ipq, &ipq->ipq_label,
- datagram, label);
-}
-
-void
-mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment)
-{
- struct label *datagramlabel, *fragmentlabel;
-
- datagramlabel = mbuf_to_label(datagram);
- fragmentlabel = mbuf_to_label(fragment);
-
- MAC_PERFORM(create_fragment, datagram, datagramlabel, fragment,
- fragmentlabel);
-}
-
-void
-mac_create_ipq(struct mbuf *fragment, struct ipq *ipq)
-{
- struct label *label;
-
- label = mbuf_to_label(fragment);
-
- MAC_PERFORM(create_ipq, fragment, label, ipq, &ipq->ipq_label);
-}
-
-void
-mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf)
-{
- struct label *oldmbuflabel, *newmbuflabel;
-
- oldmbuflabel = mbuf_to_label(oldmbuf);
- newmbuflabel = mbuf_to_label(newmbuf);
-
- MAC_PERFORM(create_mbuf_from_mbuf, oldmbuf, oldmbuflabel, newmbuf,
- newmbuflabel);
-}
-
-void
-mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *mbuf)
-{
- struct label *label;
-
- label = mbuf_to_label(mbuf);
-
- MAC_PERFORM(create_mbuf_from_bpfdesc, bpf_d, &bpf_d->bd_label, mbuf,
- label);
-}
-
-void
-mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *mbuf)
-{
- struct label *label;
-
- label = mbuf_to_label(mbuf);
-
- MAC_PERFORM(create_mbuf_linklayer, ifnet, &ifnet->if_label, mbuf,
- label);
-}
-
-void
-mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *mbuf)
-{
- struct label *label;
-
- label = mbuf_to_label(mbuf);
-
- MAC_PERFORM(create_mbuf_from_ifnet, ifnet, &ifnet->if_label, mbuf,
- label);
-}
-
-void
-mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, struct ifnet *ifnet,
- struct mbuf *newmbuf)
-{
- struct label *oldmbuflabel, *newmbuflabel;
-
- oldmbuflabel = mbuf_to_label(oldmbuf);
- newmbuflabel = mbuf_to_label(newmbuf);
-
- MAC_PERFORM(create_mbuf_multicast_encap, oldmbuf, oldmbuflabel,
- ifnet, &ifnet->if_label, newmbuf, newmbuflabel);
-}
-
-void
-mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf)
-{
- struct label *oldmbuflabel, *newmbuflabel;
-
- oldmbuflabel = mbuf_to_label(oldmbuf);
- newmbuflabel = mbuf_to_label(newmbuf);
-
- MAC_PERFORM(create_mbuf_netlayer, oldmbuf, oldmbuflabel, newmbuf,
- newmbuflabel);
-}
-
-int
-mac_fragment_match(struct mbuf *fragment, struct ipq *ipq)
-{
- struct label *label;
- int result;
-
- label = mbuf_to_label(fragment);
-
- result = 1;
- MAC_BOOLEAN(fragment_match, &&, fragment, label, ipq,
- &ipq->ipq_label);
-
- return (result);
-}
-
-void
-mac_reflect_mbuf_icmp(struct mbuf *m)
-{
- struct label *label;
-
- label = mbuf_to_label(m);
-
- MAC_PERFORM(reflect_mbuf_icmp, m, label);
-}
-void
-mac_reflect_mbuf_tcp(struct mbuf *m)
-{
- struct label *label;
-
- label = mbuf_to_label(m);
-
- MAC_PERFORM(reflect_mbuf_tcp, m, label);
-}
-
-void
-mac_update_ipq(struct mbuf *fragment, struct ipq *ipq)
-{
- struct label *label;
-
- label = mbuf_to_label(fragment);
-
- MAC_PERFORM(update_ipq, fragment, label, ipq, &ipq->ipq_label);
-}
-
-void
-mac_create_mbuf_from_socket(struct socket *socket, struct mbuf *mbuf)
-{
- struct label *label;
-
- label = mbuf_to_label(mbuf);
-
- MAC_PERFORM(create_mbuf_from_socket, socket, &socket->so_label, mbuf,
- 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)
-{
- struct label *label;
- int error;
-
- M_ASSERTPKTHDR(mbuf);
-
- if (!mac_enforce_network)
- return (0);
-
- label = mbuf_to_label(mbuf);
-
- MAC_CHECK(check_ifnet_transmit, ifnet, &ifnet->if_label, mbuf,
- label);
-
- return (error);
-}
-
int
mac_check_kenv_dump(struct ucred *cred)
{
@@ -2604,266 +152,6 @@ mac_check_kld_unload(struct ucred *cred)
}
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)
-{
- struct label *label;
- int error;
-
- if (!mac_enforce_socket)
- return (0);
-
- label = mbuf_to_label(mbuf);
-
- MAC_CHECK(check_socket_deliver, socket, &socket->so_label, mbuf,
- 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_sysarch_ioperm(struct ucred *cred)
{
int error;
@@ -2978,981 +266,3 @@ mac_check_system_sysctl(struct ucred *cred, int *name, u_int namelen,
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_device(struct mount *mp, dev_t dev, struct devfs_dirent *de)
-{
-
- MAC_PERFORM(create_devfs_device, mp, dev, de, &de->de_label);
-}
-
-void
-mac_create_devfs_symlink(struct ucred *cred, struct mount *mp,
- struct devfs_dirent *dd, struct devfs_dirent *de)
-{
-
- MAC_PERFORM(create_devfs_symlink, cred, mp, dd, &dd->de_label, de,
- &de->de_label);
-}
-
-void
-mac_create_devfs_directory(struct mount *mp, char *dirname, int dirnamelen,
- struct devfs_dirent *de)
-{
-
- MAC_PERFORM(create_devfs_directory, mp, 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(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, uap->fd, &fp);
- if (error)
- goto out;
-
- label_type = fp->f_type;
- switch (fp->f_type) {
- case DTYPE_FIFO:
- case DTYPE_VNODE:
- vp = fp->f_vnode;
-
- 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 = 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, 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 = fp->f_vnode;
- 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 = 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 entrycount, error;
-
- error = copyinstr(uap->policy, target, sizeof(target), NULL);
- if (error)
- return (error);
-
- error = ENOSYS;
- LIST_FOREACH(mpc, &mac_static_policy_list, mpc_list) {
- if (strcmp(mpc->mpc_name, target) == 0 &&
- mpc->mpc_ops->mpo_syscall != NULL) {
- error = mpc->mpc_ops->mpo_syscall(td,
- uap->call, uap->arg);
- goto out;
- }
- }
-
- if ((entrycount = mac_policy_list_conditional_busy()) != 0) {
- 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,
- uap->call, uap->arg);
- break;
- }
- }
- mac_policy_list_unbusy();
- }
-out:
- 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
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