43c43
< __FBSDID("$FreeBSD: head/sys/security/mac/mac_framework.c 121372 2003-10-22 20:47:41Z rwatson $");
---
> __FBSDID("$FreeBSD: head/sys/security/mac/mac_framework.c 121374 2003-10-22 20:59:31Z rwatson $");
87a88,89
> #include <security/mac/mac_internal.h>
>
97,98d98
< SYSCTL_DECL(_security);
<
133,181d132
< 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_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");
<
185,192d135
<
< 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);
<
196,220c139
< 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");
---
> static unsigned int nmactemp;
223,229d141
< 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)
235,245d146
< 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");
344,488d244
< * 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 = mac_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 = mac_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)
<
< /*
738,750c494
< 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
---
> void
758c502
< static void
---
> void
769,818d512
< 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);
< }
<
820,1168d513
< 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
1179,1353d523
< 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);
< }
<
1355,3275d524
< 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)
< {
< int error;
<
< if (!mac_enforce_system)
< return (0);
<
< MAC_CHECK(check_kenv_dump, cred);
<
< return (error);
< }
<
< int
< mac_check_kenv_get(struct ucred *cred, char *name)
< {
< int error;
<
< if (!mac_enforce_system)
< return (0);
<
< MAC_CHECK(check_kenv_get, cred, name);
<
< return (error);
< }
<
< int
< mac_check_kenv_set(struct ucred *cred, char *name, char *value)
< {
< int error;
<
< if (!mac_enforce_system)
< return (0);
<
< MAC_CHECK(check_kenv_set, cred, name, value);
<
< return (error);
< }
<
< int
< mac_check_kenv_unset(struct ucred *cred, char *name)
< {
< int error;
<
< if (!mac_enforce_system)
< return (0);
<
< MAC_CHECK(check_kenv_unset, cred, name);
<
< return (error);
< }
<
< int
< mac_check_kld_load(struct ucred *cred, struct vnode *vp)
< {
< int error;
<
< ASSERT_VOP_LOCKED(vp, "mac_check_kld_load");
<
< if (!mac_enforce_kld)
< return (0);
<
< MAC_CHECK(check_kld_load, cred, vp, &vp->v_label);
<
< return (error);
< }
<
< int
< mac_check_kld_stat(struct ucred *cred)
< {
< int error;
<
< if (!mac_enforce_kld)
< return (0);
<
< MAC_CHECK(check_kld_stat, cred);
<
< return (error);
< }
<
< int
< mac_check_kld_unload(struct ucred *cred)
< {
< int error;
<
< if (!mac_enforce_kld)
< return (0);
<
< MAC_CHECK(check_kld_unload, cred);
<
< 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)
< {
< 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;
<
< if (!mac_enforce_system)
< return (0);
<
< MAC_CHECK(check_sysarch_ioperm, cred);
< return (error);
< }
<
< int
< mac_check_system_acct(struct ucred *cred, struct vnode *vp)
< {
< int error;
<
< if (vp != NULL) {
< ASSERT_VOP_LOCKED(vp, "mac_check_system_acct");
< }
<
< if (!mac_enforce_system)
< return (0);
<
< MAC_CHECK(check_system_acct, cred, vp,
< vp != NULL ? &vp->v_label : NULL);
<
< return (error);
< }
<
< int
< mac_check_system_nfsd(struct ucred *cred)
< {
< int error;
<
< if (!mac_enforce_system)
< return (0);
<
< MAC_CHECK(check_system_nfsd, cred);
<
< 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_settime(struct ucred *cred)
< {
< int error;
<
< if (!mac_enforce_system)
< return (0);
<
< MAC_CHECK(check_system_settime, cred);
<
< 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_swapoff(struct ucred *cred, struct vnode *vp)
< {
< int error;
<
< ASSERT_VOP_LOCKED(vp, "mac_check_system_swapoff");
<
< if (!mac_enforce_system)
< return (0);
<
< MAC_CHECK(check_system_swapoff, 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_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