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authorrwatson <rwatson@FreeBSD.org>2007-10-29 13:33:06 +0000
committerrwatson <rwatson@FreeBSD.org>2007-10-29 13:33:06 +0000
commita4265719055fe445116eb2743b6aacf518bb1a8d (patch)
treeb5d3ede5fbbf1cb40c13deb6bb8e406ce58b639e /sys/security/mac_lomac
parent17e940f736d56194ae75e4a2963c775a59f0a3f6 (diff)
downloadFreeBSD-src-a4265719055fe445116eb2743b6aacf518bb1a8d.zip
FreeBSD-src-a4265719055fe445116eb2743b6aacf518bb1a8d.tar.gz
Resort TrustedBSD MAC Framework policy entry point implementations and
declarations to match the object, operation sort order in the framework itself. Obtained from: TrustedBSD Project
Diffstat (limited to 'sys/security/mac_lomac')
-rw-r--r--sys/security/mac_lomac/mac_lomac.c1729
1 files changed, 868 insertions, 861 deletions
diff --git a/sys/security/mac_lomac/mac_lomac.c b/sys/security/mac_lomac/mac_lomac.c
index 6ee206a..24dbefc 100644
--- a/sys/security/mac_lomac/mac_lomac.c
+++ b/sys/security/mac_lomac/mac_lomac.c
@@ -631,15 +631,6 @@ lomac_init_label_waitcheck(struct label *label, int flag)
}
static void
-lomac_proc_init_label(struct label *label)
-{
-
- PSLOT_SET(label, malloc(sizeof(struct mac_lomac_proc), M_LOMAC,
- M_ZERO | M_WAITOK));
- mtx_init(&PSLOT(label)->mtx, "MAC/Lomac proc lock", NULL, MTX_DEF);
-}
-
-static void
lomac_destroy_label(struct label *label)
{
@@ -647,15 +638,6 @@ lomac_destroy_label(struct label *label)
SLOT_SET(label, NULL);
}
-static void
-lomac_proc_destroy_label(struct label *label)
-{
-
- mtx_destroy(&PSLOT(label)->mtx);
- FREE(PSLOT(label), M_LOMAC);
- PSLOT_SET(label, NULL);
-}
-
static int
lomac_element_to_string(struct sbuf *sb, struct mac_lomac_element *element)
{
@@ -889,339 +871,282 @@ lomac_copy_label(struct label *src, struct label *dest)
}
/*
- * Labeling event operations: file system objects, and things that look a lot
- * like file system objects.
+ * Object-specific entry point implementations are sorted alphabetically by
+ * object type name and then by operation.
*/
-static void
-lomac_devfs_create_device(struct ucred *cred, struct mount *mp,
- struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
+static int
+lomac_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel,
+ struct ifnet *ifp, struct label *ifplabel)
{
- struct mac_lomac *ml;
- int lomac_type;
+ struct mac_lomac *a, *b;
- ml = SLOT(delabel);
- if (strcmp(dev->si_name, "null") == 0 ||
- strcmp(dev->si_name, "zero") == 0 ||
- strcmp(dev->si_name, "random") == 0 ||
- strncmp(dev->si_name, "fd/", strlen("fd/")) == 0 ||
- strncmp(dev->si_name, "ttyv", strlen("ttyv")) == 0)
- lomac_type = MAC_LOMAC_TYPE_EQUAL;
- else if (ptys_equal &&
- (strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 ||
- strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0))
- lomac_type = MAC_LOMAC_TYPE_EQUAL;
- else
- lomac_type = MAC_LOMAC_TYPE_HIGH;
- lomac_set_single(ml, lomac_type, 0);
-}
+ if (!lomac_enabled)
+ return (0);
-static void
-lomac_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen,
- struct devfs_dirent *de, struct label *delabel)
-{
- struct mac_lomac *ml;
+ a = SLOT(dlabel);
+ b = SLOT(ifplabel);
- ml = SLOT(delabel);
- lomac_set_single(ml, MAC_LOMAC_TYPE_HIGH, 0);
+ if (lomac_equal_single(a, b))
+ return (0);
+ return (EACCES);
}
static void
-lomac_devfs_create_symlink(struct ucred *cred, struct mount *mp,
- struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
- struct label *delabel)
+lomac_bpfdesc_create(struct ucred *cred, struct bpf_d *d,
+ struct label *dlabel)
{
struct mac_lomac *source, *dest;
source = SLOT(cred->cr_label);
- dest = SLOT(delabel);
-
- lomac_copy_single(source, dest);
-}
-
-static void
-lomac_mount_create(struct ucred *cred, struct mount *mp,
- struct label *mplabel)
-{
- struct mac_lomac *source, *dest;
+ dest = SLOT(dlabel);
- source = SLOT(cred->cr_label);
- dest = SLOT(mplabel);
lomac_copy_single(source, dest);
}
static void
-lomac_vnode_relabel(struct ucred *cred, struct vnode *vp,
- struct label *vplabel, struct label *newlabel)
-{
- struct mac_lomac *source, *dest;
-
- source = SLOT(newlabel);
- dest = SLOT(vplabel);
-
- try_relabel(source, dest);
-}
-
-static void
-lomac_devfs_update(struct mount *mp, struct devfs_dirent *de,
- struct label *delabel, struct vnode *vp, struct label *vplabel)
-{
- struct mac_lomac *source, *dest;
-
- source = SLOT(vplabel);
- dest = SLOT(delabel);
-
- lomac_copy(source, dest);
-}
-
-static void
-lomac_devfs_vnode_associate(struct mount *mp, struct label *mplabel,
- struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
- struct label *vplabel)
+lomac_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel,
+ struct mbuf *m, struct label *mlabel)
{
struct mac_lomac *source, *dest;
- source = SLOT(delabel);
- dest = SLOT(vplabel);
+ source = SLOT(dlabel);
+ dest = SLOT(mlabel);
lomac_copy_single(source, dest);
}
static int
-lomac_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
- struct vnode *vp, struct label *vplabel)
+lomac_cred_check_relabel(struct ucred *cred, struct label *newlabel)
{
- struct mac_lomac ml_temp, *source, *dest;
- int buflen, error;
-
- source = SLOT(mplabel);
- dest = SLOT(vplabel);
+ struct mac_lomac *subj, *new;
+ int error;
- buflen = sizeof(ml_temp);
- bzero(&ml_temp, buflen);
+ subj = SLOT(cred->cr_label);
+ new = SLOT(newlabel);
- error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
- MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&ml_temp, curthread);
- if (error == ENOATTR || error == EOPNOTSUPP) {
- /* Fall back to the mntlabel. */
- lomac_copy_single(source, dest);
- return (0);
- } else if (error)
+ /*
+ * If there is a LOMAC label update for the credential, it may be an
+ * update of the single, range, or both.
+ */
+ error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
+ if (error)
return (error);
- if (buflen != sizeof(ml_temp)) {
- if (buflen != sizeof(ml_temp) - sizeof(ml_temp.ml_auxsingle)) {
- printf("lomac_vnode_associate_extattr: bad size %d\n",
- buflen);
- return (EPERM);
- }
- bzero(&ml_temp.ml_auxsingle, sizeof(ml_temp.ml_auxsingle));
- buflen = sizeof(ml_temp);
- (void)vn_extattr_set(vp, IO_NODELOCKED,
- MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME,
- buflen, (char *)&ml_temp, curthread);
- }
- if (lomac_valid(&ml_temp) != 0) {
- printf("lomac_vnode_associate_extattr: invalid\n");
- return (EPERM);
- }
- if ((ml_temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) !=
- MAC_LOMAC_FLAG_SINGLE) {
- printf("lomac_vnode_associate_extattr: not single\n");
- return (EPERM);
- }
-
- lomac_copy_single(&ml_temp, dest);
- return (0);
-}
-
-static void
-lomac_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,
- struct vnode *vp, struct label *vplabel)
-{
- struct mac_lomac *source, *dest;
-
- source = SLOT(mplabel);
- dest = SLOT(vplabel);
+ /*
+ * If the LOMAC label is to be changed, authorize as appropriate.
+ */
+ if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
+ /*
+ * Fill in the missing parts from the previous label.
+ */
+ if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
+ lomac_copy_single(subj, new);
+ if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
+ lomac_copy_range(subj, new);
- lomac_copy_single(source, dest);
-}
+ /*
+ * To change the LOMAC range on a credential, the new range
+ * label must be in the current range.
+ */
+ if (!lomac_range_in_range(new, subj))
+ return (EPERM);
-static int
-lomac_vnode_create_extattr(struct ucred *cred, struct mount *mp,
- struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
- struct vnode *vp, struct label *vplabel, struct componentname *cnp)
-{
- struct mac_lomac *source, *dest, *dir, temp;
- size_t buflen;
- int error;
+ /*
+ * To change the LOMAC single label on a credential, the new
+ * single label must be in the new range. Implicitly from
+ * the previous check, the new single is in the old range.
+ */
+ if (!lomac_single_in_range(new, new))
+ return (EPERM);
- buflen = sizeof(temp);
- bzero(&temp, buflen);
+ /*
+ * To have EQUAL in any component of the new credential LOMAC
+ * label, the subject must already have EQUAL in their label.
+ */
+ if (lomac_contains_equal(new)) {
+ error = lomac_subject_privileged(subj);
+ if (error)
+ return (error);
+ }
- source = SLOT(cred->cr_label);
- dest = SLOT(vplabel);
- dir = SLOT(dvplabel);
- if (dir->ml_flags & MAC_LOMAC_FLAG_AUX) {
- lomac_copy_auxsingle(dir, &temp);
- lomac_set_single(&temp, dir->ml_auxsingle.mle_type,
- dir->ml_auxsingle.mle_grade);
- } else {
- lomac_copy_single(source, &temp);
+ /*
+ * XXXMAC: Additional consistency tests regarding the single
+ * and range of the new label might be performed here.
+ */
}
- error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
- MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
- if (error == 0)
- lomac_copy(&temp, dest);
- return (error);
+ return (0);
}
static int
-lomac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
- struct label *vplabel, struct label *intlabel)
+lomac_cred_check_visible(struct ucred *cr1, struct ucred *cr2)
{
- struct mac_lomac *source, temp;
- size_t buflen;
- int error;
-
- buflen = sizeof(temp);
- bzero(&temp, buflen);
+ struct mac_lomac *subj, *obj;
- source = SLOT(intlabel);
- if ((source->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
+ if (!lomac_enabled)
return (0);
- lomac_copy_single(source, &temp);
- error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
- MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
- return (error);
-}
+ subj = SLOT(cr1->cr_label);
+ obj = SLOT(cr2->cr_label);
-/*
- * Labeling event operations: IPC object.
- */
+ /* XXX: range */
+ if (!lomac_dominate_single(obj, subj))
+ return (ESRCH);
+
+ return (0);
+}
static void
-lomac_inpcb_create(struct socket *so, struct label *solabel,
- struct inpcb *inp, struct label *inplabel)
+lomac_cred_relabel(struct ucred *cred, struct label *newlabel)
{
struct mac_lomac *source, *dest;
- source = SLOT(solabel);
- dest = SLOT(inplabel);
+ source = SLOT(newlabel);
+ dest = SLOT(cred->cr_label);
- lomac_copy_single(source, dest);
+ try_relabel(source, dest);
}
static void
-lomac_socket_create_mbuf(struct socket *so, struct label *solabel,
- struct mbuf *m, struct label *mlabel)
+lomac_devfs_create_device(struct ucred *cred, struct mount *mp,
+ struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
{
- struct mac_lomac *source, *dest;
-
- source = SLOT(solabel);
- dest = SLOT(mlabel);
+ struct mac_lomac *ml;
+ int lomac_type;
- lomac_copy_single(source, dest);
+ ml = SLOT(delabel);
+ if (strcmp(dev->si_name, "null") == 0 ||
+ strcmp(dev->si_name, "zero") == 0 ||
+ strcmp(dev->si_name, "random") == 0 ||
+ strncmp(dev->si_name, "fd/", strlen("fd/")) == 0 ||
+ strncmp(dev->si_name, "ttyv", strlen("ttyv")) == 0)
+ lomac_type = MAC_LOMAC_TYPE_EQUAL;
+ else if (ptys_equal &&
+ (strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 ||
+ strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0))
+ lomac_type = MAC_LOMAC_TYPE_EQUAL;
+ else
+ lomac_type = MAC_LOMAC_TYPE_HIGH;
+ lomac_set_single(ml, lomac_type, 0);
}
static void
-lomac_socket_create(struct ucred *cred, struct socket *so,
- struct label *solabel)
+lomac_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen,
+ struct devfs_dirent *de, struct label *delabel)
{
- struct mac_lomac *source, *dest;
-
- source = SLOT(cred->cr_label);
- dest = SLOT(solabel);
+ struct mac_lomac *ml;
- lomac_copy_single(source, dest);
+ ml = SLOT(delabel);
+ lomac_set_single(ml, MAC_LOMAC_TYPE_HIGH, 0);
}
static void
-lomac_pipe_create(struct ucred *cred, struct pipepair *pp,
- struct label *pplabel)
+lomac_devfs_create_symlink(struct ucred *cred, struct mount *mp,
+ struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
+ struct label *delabel)
{
struct mac_lomac *source, *dest;
source = SLOT(cred->cr_label);
- dest = SLOT(pplabel);
+ dest = SLOT(delabel);
lomac_copy_single(source, dest);
}
static void
-lomac_socket_newconn(struct socket *oldso, struct label *oldsolabel,
- struct socket *newso, struct label *newsolabel)
+lomac_devfs_update(struct mount *mp, struct devfs_dirent *de,
+ struct label *delabel, struct vnode *vp, struct label *vplabel)
{
struct mac_lomac *source, *dest;
- source = SLOT(oldsolabel);
- dest = SLOT(newsolabel);
+ source = SLOT(vplabel);
+ dest = SLOT(delabel);
- lomac_copy_single(source, dest);
+ lomac_copy(source, dest);
}
static void
-lomac_socket_relabel(struct ucred *cred, struct socket *so,
- struct label *solabel, struct label *newlabel)
+lomac_devfs_vnode_associate(struct mount *mp, struct label *mplabel,
+ struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
+ struct label *vplabel)
{
struct mac_lomac *source, *dest;
- source = SLOT(newlabel);
- dest = SLOT(solabel);
+ source = SLOT(delabel);
+ dest = SLOT(vplabel);
- try_relabel(source, dest);
+ lomac_copy_single(source, dest);
}
-static void
-lomac_pipe_relabel(struct ucred *cred, struct pipepair *pp,
- struct label *pplabel, struct label *newlabel)
+static int
+lomac_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp,
+ struct label *ifplabel, struct label *newlabel)
{
- struct mac_lomac *source, *dest;
-
- source = SLOT(newlabel);
- dest = SLOT(pplabel);
+ struct mac_lomac *subj, *new;
+ int error;
- try_relabel(source, dest);
-}
+ subj = SLOT(cred->cr_label);
+ new = SLOT(newlabel);
-static void
-lomac_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
- struct socket *so, struct label *sopeerlabel)
-{
- struct mac_lomac *source, *dest;
+ /*
+ * If there is a LOMAC label update for the interface, it may be an
+ * update of the single, range, or both.
+ */
+ error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
+ if (error)
+ return (error);
- source = SLOT(mlabel);
- dest = SLOT(sopeerlabel);
+ /*
+ * Relabling network interfaces requires LOMAC privilege.
+ */
+ error = lomac_subject_privileged(subj);
+ if (error)
+ return (error);
- lomac_copy_single(source, dest);
-}
+ /*
+ * If the LOMAC label is to be changed, authorize as appropriate.
+ */
+ if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
+ /*
+ * Fill in the missing parts from the previous label.
+ */
+ if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
+ lomac_copy_single(subj, new);
+ if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
+ lomac_copy_range(subj, new);
-/*
- * Labeling event operations: network objects.
- */
-static void
-lomac_socketpeer_set_from_socket(struct socket *oldso,
- struct label *oldsolabel, struct socket *newso,
- struct label *newsopeerlabel)
-{
- struct mac_lomac *source, *dest;
+ /*
+ * Rely on the traditional superuser status for the LOMAC
+ * interface relabel requirements. XXXMAC: This will go
+ * away.
+ *
+ * XXXRW: This is also redundant to a higher layer check.
+ */
+ error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0);
+ if (error)
+ return (EPERM);
- source = SLOT(oldsolabel);
- dest = SLOT(newsopeerlabel);
+ /*
+ * XXXMAC: Additional consistency tests regarding the single
+ * and the range of the new label might be performed here.
+ */
+ }
- lomac_copy_single(source, dest);
+ return (0);
}
-static void
-lomac_bpfdesc_create(struct ucred *cred, struct bpf_d *d,
- struct label *dlabel)
+static int
+lomac_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel,
+ struct mbuf *m, struct label *mlabel)
{
- struct mac_lomac *source, *dest;
+ struct mac_lomac *p, *i;
- source = SLOT(cred->cr_label);
- dest = SLOT(dlabel);
+ if (!lomac_enabled)
+ return (0);
- lomac_copy_single(source, dest);
+ p = SLOT(mlabel);
+ i = SLOT(ifplabel);
+
+ return (lomac_single_in_range(p, i) ? 0 : EACCES);
}
static void
@@ -1283,38 +1208,52 @@ set:
}
static void
-lomac_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *ipq,
- struct label *ipqlabel)
+lomac_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel,
+ struct mbuf *m, struct label *mlabel)
{
struct mac_lomac *source, *dest;
- source = SLOT(mlabel);
- dest = SLOT(ipqlabel);
+ source = SLOT(ifplabel);
+ dest = SLOT(mlabel);
lomac_copy_single(source, dest);
}
static void
-lomac_ipq_reassemble(struct ipq *ipq, struct label *ipqlabel,
- struct mbuf *m, struct label *mlabel)
+lomac_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
+ struct label *ifplabel, struct label *newlabel)
{
struct mac_lomac *source, *dest;
- source = SLOT(ipqlabel);
- dest = SLOT(mlabel);
+ source = SLOT(newlabel);
+ dest = SLOT(ifplabel);
- /* Just use the head, since we require them all to match. */
- lomac_copy_single(source, dest);
+ try_relabel(source, dest);
+}
+
+static int
+lomac_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel,
+ struct mbuf *m, struct label *mlabel)
+{
+ struct mac_lomac *p, *i;
+
+ if (!lomac_enabled)
+ return (0);
+
+ p = SLOT(mlabel);
+ i = SLOT(inplabel);
+
+ return (lomac_equal_single(p, i) ? 0 : EACCES);
}
static void
-lomac_netinet_fragment(struct mbuf *m, struct label *mlabel,
- struct mbuf *frag, struct label *fraglabel)
+lomac_inpcb_create(struct socket *so, struct label *solabel,
+ struct inpcb *inp, struct label *inplabel)
{
struct mac_lomac *source, *dest;
- source = SLOT(mlabel);
- dest = SLOT(fraglabel);
+ source = SLOT(solabel);
+ dest = SLOT(inplabel);
lomac_copy_single(source, dest);
}
@@ -1332,25 +1271,25 @@ lomac_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel,
}
static void
-lomac_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel,
- struct mbuf *m, struct label *mlabel)
+lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel,
+ struct inpcb *inp, struct label *inplabel)
{
struct mac_lomac *source, *dest;
- source = SLOT(dlabel);
- dest = SLOT(mlabel);
+ source = SLOT(solabel);
+ dest = SLOT(inplabel);
lomac_copy_single(source, dest);
}
static void
-lomac_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel,
- struct mbuf *m, struct label *mlabel)
+lomac_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *ipq,
+ struct label *ipqlabel)
{
struct mac_lomac *source, *dest;
- source = SLOT(ifplabel);
- dest = SLOT(mlabel);
+ source = SLOT(mlabel);
+ dest = SLOT(ipqlabel);
lomac_copy_single(source, dest);
}
@@ -1368,15 +1307,16 @@ lomac_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *ipq,
}
static void
-lomac_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
- struct label *ifplabel, struct label *newlabel)
+lomac_ipq_reassemble(struct ipq *ipq, struct label *ipqlabel,
+ struct mbuf *m, struct label *mlabel)
{
struct mac_lomac *source, *dest;
- source = SLOT(newlabel);
- dest = SLOT(ifplabel);
+ source = SLOT(ipqlabel);
+ dest = SLOT(mlabel);
- try_relabel(source, dest);
+ /* Just use the head, since we require them all to match. */
+ lomac_copy_single(source, dest);
}
static void
@@ -1387,37 +1327,36 @@ lomac_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *ipq,
/* NOOP: we only accept matching labels, so no need to update */
}
-static void
-lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel,
- struct inpcb *inp, struct label *inplabel)
+static int
+lomac_kld_check_load(struct ucred *cred, struct vnode *vp,
+ struct label *vplabel)
{
- struct mac_lomac *source, *dest;
+ struct mac_lomac *subj, *obj;
- source = SLOT(solabel);
- dest = SLOT(inplabel);
+ if (!lomac_enabled)
+ return (0);
- lomac_copy_single(source, dest);
-}
+ subj = SLOT(cred->cr_label);
+ obj = SLOT(vplabel);
-static void
-lomac_syncache_create(struct label *label, struct inpcb *inp)
-{
- struct mac_lomac *source, *dest;
+ if (lomac_subject_privileged(subj))
+ return (EPERM);
- source = SLOT(inp->inp_label);
- dest = SLOT(label);
- lomac_copy(source, dest);
+ if (!lomac_high_single(obj))
+ return (EACCES);
+
+ return (0);
}
static void
-lomac_syncache_create_mbuf(struct label *sc_label, struct mbuf *m,
- struct label *mlabel)
+lomac_mount_create(struct ucred *cred, struct mount *mp,
+ struct label *mplabel)
{
struct mac_lomac *source, *dest;
- source = SLOT(sc_label);
- dest = SLOT(mlabel);
- lomac_copy(source, dest);
+ source = SLOT(cred->cr_label);
+ dest = SLOT(mplabel);
+ lomac_copy_single(source, dest);
}
static void
@@ -1466,6 +1405,18 @@ lomac_netinet_firewall_send(struct mbuf *m, struct label *mlabel)
}
static void
+lomac_netinet_fragment(struct mbuf *m, struct label *mlabel,
+ struct mbuf *frag, struct label *fraglabel)
+{
+ struct mac_lomac *source, *dest;
+
+ source = SLOT(mlabel);
+ dest = SLOT(fraglabel);
+
+ lomac_copy_single(source, dest);
+}
+
+static void
lomac_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel,
struct mbuf *msend, struct label *msendlabel)
{
@@ -1499,306 +1450,6 @@ lomac_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel,
lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
}
-/*
- * Labeling event operations: processes.
- */
-static void
-lomac_vnode_execve_transition(struct ucred *old, struct ucred *new,
- struct vnode *vp, struct label *vplabel, struct label *interpvplabel,
- struct image_params *imgp, struct label *execlabel)
-{
- struct mac_lomac *source, *dest, *obj, *robj;
-
- source = SLOT(old->cr_label);
- dest = SLOT(new->cr_label);
- obj = SLOT(vplabel);
- robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
-
- lomac_copy(source, dest);
- /*
- * If there's an auxiliary label on the real object, respect it and
- * assume that this level should be assumed immediately if a higher
- * level is currently in place.
- */
- if (robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
- !lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single)
- && lomac_auxsingle_in_range(robj, dest))
- lomac_set_single(dest, robj->ml_auxsingle.mle_type,
- robj->ml_auxsingle.mle_grade);
- /*
- * Restructuring to use the execve transitioning mechanism instead of
- * the normal demotion mechanism here would be difficult, so just
- * copy the label over and perform standard demotion. This is also
- * non-optimal because it will result in the intermediate label "new"
- * being created and immediately recycled.
- */
- if (lomac_enabled && revocation_enabled &&
- !lomac_dominate_single(obj, source))
- (void)maybe_demote(source, obj, "executing", "file", vp);
-}
-
-static int
-lomac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp,
- struct label *vplabel, struct label *interpvplabel,
- struct image_params *imgp, struct label *execlabel)
-{
- struct mac_lomac *subj, *obj, *robj;
-
- if (!lomac_enabled || !revocation_enabled)
- return (0);
-
- subj = SLOT(old->cr_label);
- obj = SLOT(vplabel);
- robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
-
- return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
- !lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single)
- && lomac_auxsingle_in_range(robj, subj)) ||
- !lomac_dominate_single(obj, subj));
-}
-
-static void
-lomac_proc_create_swapper(struct ucred *cred)
-{
- struct mac_lomac *dest;
-
- dest = SLOT(cred->cr_label);
-
- lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
- lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
-}
-
-static void
-lomac_proc_create_init(struct ucred *cred)
-{
- struct mac_lomac *dest;
-
- dest = SLOT(cred->cr_label);
-
- lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0);
- lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
-}
-
-static void
-lomac_cred_relabel(struct ucred *cred, struct label *newlabel)
-{
- struct mac_lomac *source, *dest;
-
- source = SLOT(newlabel);
- dest = SLOT(cred->cr_label);
-
- try_relabel(source, dest);
-}
-
-/*
- * Access control checks.
- */
-static int
-lomac_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel,
- struct ifnet *ifp, struct label *ifplabel)
-{
- struct mac_lomac *a, *b;
-
- if (!lomac_enabled)
- return (0);
-
- a = SLOT(dlabel);
- b = SLOT(ifplabel);
-
- if (lomac_equal_single(a, b))
- return (0);
- return (EACCES);
-}
-
-static int
-lomac_cred_check_relabel(struct ucred *cred, struct label *newlabel)
-{
- struct mac_lomac *subj, *new;
- int error;
-
- subj = SLOT(cred->cr_label);
- new = SLOT(newlabel);
-
- /*
- * If there is a LOMAC label update for the credential, it may be an
- * update of the single, range, or both.
- */
- error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
- if (error)
- return (error);
-
- /*
- * If the LOMAC label is to be changed, authorize as appropriate.
- */
- if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
- /*
- * Fill in the missing parts from the previous label.
- */
- if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
- lomac_copy_single(subj, new);
- if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
- lomac_copy_range(subj, new);
-
- /*
- * To change the LOMAC range on a credential, the new range
- * label must be in the current range.
- */
- if (!lomac_range_in_range(new, subj))
- return (EPERM);
-
- /*
- * To change the LOMAC single label on a credential, the new
- * single label must be in the new range. Implicitly from
- * the previous check, the new single is in the old range.
- */
- if (!lomac_single_in_range(new, new))
- return (EPERM);
-
- /*
- * To have EQUAL in any component of the new credential LOMAC
- * label, the subject must already have EQUAL in their label.
- */
- if (lomac_contains_equal(new)) {
- error = lomac_subject_privileged(subj);
- if (error)
- return (error);
- }
-
- /*
- * XXXMAC: Additional consistency tests regarding the single
- * and range of the new label might be performed here.
- */
- }
-
- return (0);
-}
-
-static int
-lomac_cred_check_visible(struct ucred *cr1, struct ucred *cr2)
-{
- struct mac_lomac *subj, *obj;
-
- if (!lomac_enabled)
- return (0);
-
- subj = SLOT(cr1->cr_label);
- obj = SLOT(cr2->cr_label);
-
- /* XXX: range */
- if (!lomac_dominate_single(obj, subj))
- return (ESRCH);
-
- return (0);
-}
-
-static int
-lomac_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp,
- struct label *ifplabel, struct label *newlabel)
-{
- struct mac_lomac *subj, *new;
- int error;
-
- subj = SLOT(cred->cr_label);
- new = SLOT(newlabel);
-
- /*
- * If there is a LOMAC label update for the interface, it may be an
- * update of the single, range, or both.
- */
- error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
- if (error)
- return (error);
-
- /*
- * Relabling network interfaces requires LOMAC privilege.
- */
- error = lomac_subject_privileged(subj);
- if (error)
- return (error);
-
- /*
- * If the LOMAC label is to be changed, authorize as appropriate.
- */
- if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
- /*
- * Fill in the missing parts from the previous label.
- */
- if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
- lomac_copy_single(subj, new);
- if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
- lomac_copy_range(subj, new);
-
- /*
- * Rely on the traditional superuser status for the LOMAC
- * interface relabel requirements. XXXMAC: This will go
- * away.
- *
- * XXXRW: This is also redundant to a higher layer check.
- */
- error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0);
- if (error)
- return (EPERM);
-
- /*
- * XXXMAC: Additional consistency tests regarding the single
- * and the range of the new label might be performed here.
- */
- }
-
- return (0);
-}
-
-static int
-lomac_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel,
- struct mbuf *m, struct label *mlabel)
-{
- struct mac_lomac *p, *i;
-
- if (!lomac_enabled)
- return (0);
-
- p = SLOT(mlabel);
- i = SLOT(ifplabel);
-
- return (lomac_single_in_range(p, i) ? 0 : EACCES);
-}
-
-static int
-lomac_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel,
- struct mbuf *m, struct label *mlabel)
-{
- struct mac_lomac *p, *i;
-
- if (!lomac_enabled)
- return (0);
-
- p = SLOT(mlabel);
- i = SLOT(inplabel);
-
- return (lomac_equal_single(p, i) ? 0 : EACCES);
-}
-
-static int
-lomac_kld_check_load(struct ucred *cred, struct vnode *vp,
- struct label *vplabel)
-{
- struct mac_lomac *subj, *obj;
-
- if (!lomac_enabled)
- return (0);
-
- subj = SLOT(cred->cr_label);
- obj = SLOT(vplabel);
-
- if (lomac_subject_privileged(subj))
- return (EPERM);
-
- if (!lomac_high_single(obj))
- return (EACCES);
-
- return (0);
-}
-
static int
lomac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
@@ -1899,148 +1550,28 @@ lomac_pipe_check_write(struct ucred *cred, struct pipepair *pp,
return (0);
}
-static int
-lomac_proc_check_debug(struct ucred *cred, struct proc *p)
-{
- struct mac_lomac *subj, *obj;
-
- if (!lomac_enabled)
- return (0);
-
- subj = SLOT(cred->cr_label);
- obj = SLOT(p->p_ucred->cr_label);
-
- /* XXX: range checks */
- if (!lomac_dominate_single(obj, subj))
- return (ESRCH);
- if (!lomac_subject_dominate(subj, obj))
- return (EACCES);
-
- return (0);
-}
-
-static int
-lomac_proc_check_sched(struct ucred *cred, struct proc *p)
-{
- struct mac_lomac *subj, *obj;
-
- if (!lomac_enabled)
- return (0);
-
- subj = SLOT(cred->cr_label);
- obj = SLOT(p->p_ucred->cr_label);
-
- /* XXX: range checks */
- if (!lomac_dominate_single(obj, subj))
- return (ESRCH);
- if (!lomac_subject_dominate(subj, obj))
- return (EACCES);
-
- return (0);
-}
-
-static int
-lomac_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
-{
- struct mac_lomac *subj, *obj;
-
- if (!lomac_enabled)
- return (0);
-
- subj = SLOT(cred->cr_label);
- obj = SLOT(p->p_ucred->cr_label);
-
- /* XXX: range checks */
- if (!lomac_dominate_single(obj, subj))
- return (ESRCH);
- if (!lomac_subject_dominate(subj, obj))
- return (EACCES);
-
- return (0);
-}
-
-static int
-lomac_socket_check_deliver(struct socket *so, struct label *solabel,
- struct mbuf *m, struct label *mlabel)
-{
- struct mac_lomac *p, *s;
-
- if (!lomac_enabled)
- return (0);
-
- p = SLOT(mlabel);
- s = SLOT(solabel);
-
- return (lomac_equal_single(p, s) ? 0 : EACCES);
-}
-
-static int
-lomac_socket_check_relabel(struct ucred *cred, struct socket *so,
- struct label *solabel, struct label *newlabel)
+static void
+lomac_pipe_create(struct ucred *cred, struct pipepair *pp,
+ struct label *pplabel)
{
- struct mac_lomac *subj, *obj, *new;
- int error;
-
- new = SLOT(newlabel);
- subj = SLOT(cred->cr_label);
- obj = SLOT(solabel);
-
- /*
- * If there is a LOMAC label update for the socket, it may be an
- * update of single.
- */
- error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
- if (error)
- return (error);
-
- /*
- * To relabel a socket, the old socket single must be in the subject
- * range.
- */
- if (!lomac_single_in_range(obj, subj))
- return (EPERM);
-
- /*
- * If the LOMAC label is to be changed, authorize as appropriate.
- */
- if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
- /*
- * To relabel a socket, the new socket single must be in the
- * subject range.
- */
- if (!lomac_single_in_range(new, subj))
- return (EPERM);
+ struct mac_lomac *source, *dest;
- /*
- * To change the LOMAC label on the socket to contain EQUAL,
- * the subject must have appropriate privilege.
- */
- if (lomac_contains_equal(new)) {
- error = lomac_subject_privileged(subj);
- if (error)
- return (error);
- }
- }
+ source = SLOT(cred->cr_label);
+ dest = SLOT(pplabel);
- return (0);
+ lomac_copy_single(source, dest);
}
-static int
-lomac_socket_check_visible(struct ucred *cred, struct socket *so,
- struct label *solabel)
+static void
+lomac_pipe_relabel(struct ucred *cred, struct pipepair *pp,
+ struct label *pplabel, struct label *newlabel)
{
- struct mac_lomac *subj, *obj;
-
- if (!lomac_enabled)
- return (0);
-
- subj = SLOT(cred->cr_label);
- obj = SLOT(solabel);
+ struct mac_lomac *source, *dest;
- if (!lomac_dominate_single(obj, subj))
- return (ENOENT);
+ source = SLOT(newlabel);
+ dest = SLOT(pplabel);
- return (0);
+ try_relabel(source, dest);
}
/*
@@ -2232,6 +1763,283 @@ lomac_priv_check(struct ucred *cred, int priv)
return (0);
}
+static int
+lomac_proc_check_debug(struct ucred *cred, struct proc *p)
+{
+ struct mac_lomac *subj, *obj;
+
+ if (!lomac_enabled)
+ return (0);
+
+ subj = SLOT(cred->cr_label);
+ obj = SLOT(p->p_ucred->cr_label);
+
+ /* XXX: range checks */
+ if (!lomac_dominate_single(obj, subj))
+ return (ESRCH);
+ if (!lomac_subject_dominate(subj, obj))
+ return (EACCES);
+
+ return (0);
+}
+
+static int
+lomac_proc_check_sched(struct ucred *cred, struct proc *p)
+{
+ struct mac_lomac *subj, *obj;
+
+ if (!lomac_enabled)
+ return (0);
+
+ subj = SLOT(cred->cr_label);
+ obj = SLOT(p->p_ucred->cr_label);
+
+ /* XXX: range checks */
+ if (!lomac_dominate_single(obj, subj))
+ return (ESRCH);
+ if (!lomac_subject_dominate(subj, obj))
+ return (EACCES);
+
+ return (0);
+}
+
+static int
+lomac_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
+{
+ struct mac_lomac *subj, *obj;
+
+ if (!lomac_enabled)
+ return (0);
+
+ subj = SLOT(cred->cr_label);
+ obj = SLOT(p->p_ucred->cr_label);
+
+ /* XXX: range checks */
+ if (!lomac_dominate_single(obj, subj))
+ return (ESRCH);
+ if (!lomac_subject_dominate(subj, obj))
+ return (EACCES);
+
+ return (0);
+}
+
+static void
+lomac_proc_create_init(struct ucred *cred)
+{
+ struct mac_lomac *dest;
+
+ dest = SLOT(cred->cr_label);
+
+ lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0);
+ lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
+}
+
+static void
+lomac_proc_create_swapper(struct ucred *cred)
+{
+ struct mac_lomac *dest;
+
+ dest = SLOT(cred->cr_label);
+
+ lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
+ lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
+}
+
+static void
+lomac_proc_destroy_label(struct label *label)
+{
+
+ mtx_destroy(&PSLOT(label)->mtx);
+ FREE(PSLOT(label), M_LOMAC);
+ PSLOT_SET(label, NULL);
+}
+
+static void
+lomac_proc_init_label(struct label *label)
+{
+
+ PSLOT_SET(label, malloc(sizeof(struct mac_lomac_proc), M_LOMAC,
+ M_ZERO | M_WAITOK));
+ mtx_init(&PSLOT(label)->mtx, "MAC/Lomac proc lock", NULL, MTX_DEF);
+}
+
+static int
+lomac_socket_check_deliver(struct socket *so, struct label *solabel,
+ struct mbuf *m, struct label *mlabel)
+{
+ struct mac_lomac *p, *s;
+
+ if (!lomac_enabled)
+ return (0);
+
+ p = SLOT(mlabel);
+ s = SLOT(solabel);
+
+ return (lomac_equal_single(p, s) ? 0 : EACCES);
+}
+
+static int
+lomac_socket_check_relabel(struct ucred *cred, struct socket *so,
+ struct label *solabel, struct label *newlabel)
+{
+ struct mac_lomac *subj, *obj, *new;
+ int error;
+
+ new = SLOT(newlabel);
+ subj = SLOT(cred->cr_label);
+ obj = SLOT(solabel);
+
+ /*
+ * If there is a LOMAC label update for the socket, it may be an
+ * update of single.
+ */
+ error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
+ if (error)
+ return (error);
+
+ /*
+ * To relabel a socket, the old socket single must be in the subject
+ * range.
+ */
+ if (!lomac_single_in_range(obj, subj))
+ return (EPERM);
+
+ /*
+ * If the LOMAC label is to be changed, authorize as appropriate.
+ */
+ if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
+ /*
+ * To relabel a socket, the new socket single must be in the
+ * subject range.
+ */
+ if (!lomac_single_in_range(new, subj))
+ return (EPERM);
+
+ /*
+ * To change the LOMAC label on the socket to contain EQUAL,
+ * the subject must have appropriate privilege.
+ */
+ if (lomac_contains_equal(new)) {
+ error = lomac_subject_privileged(subj);
+ if (error)
+ return (error);
+ }
+ }
+
+ return (0);
+}
+
+static int
+lomac_socket_check_visible(struct ucred *cred, struct socket *so,
+ struct label *solabel)
+{
+ struct mac_lomac *subj, *obj;
+
+ if (!lomac_enabled)
+ return (0);
+
+ subj = SLOT(cred->cr_label);
+ obj = SLOT(solabel);
+
+ if (!lomac_dominate_single(obj, subj))
+ return (ENOENT);
+
+ return (0);
+}
+
+static void
+lomac_socket_create(struct ucred *cred, struct socket *so,
+ struct label *solabel)
+{
+ struct mac_lomac *source, *dest;
+
+ source = SLOT(cred->cr_label);
+ dest = SLOT(solabel);
+
+ lomac_copy_single(source, dest);
+}
+
+static void
+lomac_socket_create_mbuf(struct socket *so, struct label *solabel,
+ struct mbuf *m, struct label *mlabel)
+{
+ struct mac_lomac *source, *dest;
+
+ source = SLOT(solabel);
+ dest = SLOT(mlabel);
+
+ lomac_copy_single(source, dest);
+}
+
+static void
+lomac_socket_newconn(struct socket *oldso, struct label *oldsolabel,
+ struct socket *newso, struct label *newsolabel)
+{
+ struct mac_lomac *source, *dest;
+
+ source = SLOT(oldsolabel);
+ dest = SLOT(newsolabel);
+
+ lomac_copy_single(source, dest);
+}
+
+static void
+lomac_socket_relabel(struct ucred *cred, struct socket *so,
+ struct label *solabel, struct label *newlabel)
+{
+ struct mac_lomac *source, *dest;
+
+ source = SLOT(newlabel);
+ dest = SLOT(solabel);
+
+ try_relabel(source, dest);
+}
+
+static void
+lomac_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
+ struct socket *so, struct label *sopeerlabel)
+{
+ struct mac_lomac *source, *dest;
+
+ source = SLOT(mlabel);
+ dest = SLOT(sopeerlabel);
+
+ lomac_copy_single(source, dest);
+}
+
+static void
+lomac_socketpeer_set_from_socket(struct socket *oldso,
+ struct label *oldsolabel, struct socket *newso,
+ struct label *newsopeerlabel)
+{
+ struct mac_lomac *source, *dest;
+
+ source = SLOT(oldsolabel);
+ dest = SLOT(newsopeerlabel);
+
+ lomac_copy_single(source, dest);
+}
+
+static void
+lomac_syncache_create(struct label *label, struct inpcb *inp)
+{
+ struct mac_lomac *source, *dest;
+
+ source = SLOT(inp->inp_label);
+ dest = SLOT(label);
+ lomac_copy(source, dest);
+}
+
+static void
+lomac_syncache_create_mbuf(struct label *sc_label, struct mbuf *m,
+ struct label *mlabel)
+{
+ struct mac_lomac *source, *dest;
+
+ source = SLOT(sc_label);
+ dest = SLOT(mlabel);
+ lomac_copy(source, dest);
+}
static int
lomac_system_check_acct(struct ucred *cred, struct vnode *vp,
@@ -2341,6 +2149,112 @@ lomac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
return (0);
}
+static void
+lomac_thread_userret(struct thread *td)
+{
+ struct proc *p = td->td_proc;
+ struct mac_lomac_proc *subj = PSLOT(p->p_label);
+ struct ucred *newcred, *oldcred;
+ int dodrop;
+
+ mtx_lock(&subj->mtx);
+ if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
+ dodrop = 0;
+ mtx_unlock(&subj->mtx);
+ newcred = crget();
+ /*
+ * Prevent a lock order reversal in
+ * mac_cred_mmapped_drop_perms; ideally, the other user of
+ * subj->mtx wouldn't be holding Giant.
+ */
+ mtx_lock(&Giant);
+ PROC_LOCK(p);
+ mtx_lock(&subj->mtx);
+ /*
+ * Check if we lost the race while allocating the cred.
+ */
+ if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) {
+ crfree(newcred);
+ goto out;
+ }
+ oldcred = p->p_ucred;
+ crcopy(newcred, oldcred);
+ crhold(newcred);
+ lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label));
+ p->p_ucred = newcred;
+ crfree(oldcred);
+ dodrop = 1;
+ out:
+ mtx_unlock(&subj->mtx);
+ PROC_UNLOCK(p);
+ if (dodrop)
+ mac_cred_mmapped_drop_perms(curthread, newcred);
+ mtx_unlock(&Giant);
+ } else {
+ mtx_unlock(&subj->mtx);
+ }
+}
+
+static int
+lomac_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
+ struct vnode *vp, struct label *vplabel)
+{
+ struct mac_lomac ml_temp, *source, *dest;
+ int buflen, error;
+
+ source = SLOT(mplabel);
+ dest = SLOT(vplabel);
+
+ buflen = sizeof(ml_temp);
+ bzero(&ml_temp, buflen);
+
+ error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
+ MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&ml_temp, curthread);
+ if (error == ENOATTR || error == EOPNOTSUPP) {
+ /* Fall back to the mntlabel. */
+ lomac_copy_single(source, dest);
+ return (0);
+ } else if (error)
+ return (error);
+
+ if (buflen != sizeof(ml_temp)) {
+ if (buflen != sizeof(ml_temp) - sizeof(ml_temp.ml_auxsingle)) {
+ printf("lomac_vnode_associate_extattr: bad size %d\n",
+ buflen);
+ return (EPERM);
+ }
+ bzero(&ml_temp.ml_auxsingle, sizeof(ml_temp.ml_auxsingle));
+ buflen = sizeof(ml_temp);
+ (void)vn_extattr_set(vp, IO_NODELOCKED,
+ MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME,
+ buflen, (char *)&ml_temp, curthread);
+ }
+ if (lomac_valid(&ml_temp) != 0) {
+ printf("lomac_vnode_associate_extattr: invalid\n");
+ return (EPERM);
+ }
+ if ((ml_temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) !=
+ MAC_LOMAC_FLAG_SINGLE) {
+ printf("lomac_vnode_associate_extattr: not single\n");
+ return (EPERM);
+ }
+
+ lomac_copy_single(&ml_temp, dest);
+ return (0);
+}
+
+static void
+lomac_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,
+ struct vnode *vp, struct label *vplabel)
+{
+ struct mac_lomac *source, *dest;
+
+ source = SLOT(mplabel);
+ dest = SLOT(vplabel);
+
+ lomac_copy_single(source, dest);
+}
+
static int
lomac_vnode_check_create(struct ucred *cred, struct vnode *dvp,
struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
@@ -2788,162 +2702,254 @@ lomac_vnode_check_write(struct ucred *active_cred,
return (0);
}
-static void
-lomac_thread_userret(struct thread *td)
+static int
+lomac_vnode_create_extattr(struct ucred *cred, struct mount *mp,
+ struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
+ struct vnode *vp, struct label *vplabel, struct componentname *cnp)
{
- struct proc *p = td->td_proc;
- struct mac_lomac_proc *subj = PSLOT(p->p_label);
- struct ucred *newcred, *oldcred;
- int dodrop;
+ struct mac_lomac *source, *dest, *dir, temp;
+ size_t buflen;
+ int error;
- mtx_lock(&subj->mtx);
- if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
- dodrop = 0;
- mtx_unlock(&subj->mtx);
- newcred = crget();
- /*
- * Prevent a lock order reversal in
- * mac_cred_mmapped_drop_perms; ideally, the other user of
- * subj->mtx wouldn't be holding Giant.
- */
- mtx_lock(&Giant);
- PROC_LOCK(p);
- mtx_lock(&subj->mtx);
- /*
- * Check if we lost the race while allocating the cred.
- */
- if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) {
- crfree(newcred);
- goto out;
- }
- oldcred = p->p_ucred;
- crcopy(newcred, oldcred);
- crhold(newcred);
- lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label));
- p->p_ucred = newcred;
- crfree(oldcred);
- dodrop = 1;
- out:
- mtx_unlock(&subj->mtx);
- PROC_UNLOCK(p);
- if (dodrop)
- mac_cred_mmapped_drop_perms(curthread, newcred);
- mtx_unlock(&Giant);
+ buflen = sizeof(temp);
+ bzero(&temp, buflen);
+
+ source = SLOT(cred->cr_label);
+ dest = SLOT(vplabel);
+ dir = SLOT(dvplabel);
+ if (dir->ml_flags & MAC_LOMAC_FLAG_AUX) {
+ lomac_copy_auxsingle(dir, &temp);
+ lomac_set_single(&temp, dir->ml_auxsingle.mle_type,
+ dir->ml_auxsingle.mle_grade);
} else {
- mtx_unlock(&subj->mtx);
+ lomac_copy_single(source, &temp);
}
+
+ error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
+ MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
+ if (error == 0)
+ lomac_copy(&temp, dest);
+ return (error);
+}
+
+static void
+lomac_vnode_execve_transition(struct ucred *old, struct ucred *new,
+ struct vnode *vp, struct label *vplabel, struct label *interpvplabel,
+ struct image_params *imgp, struct label *execlabel)
+{
+ struct mac_lomac *source, *dest, *obj, *robj;
+
+ source = SLOT(old->cr_label);
+ dest = SLOT(new->cr_label);
+ obj = SLOT(vplabel);
+ robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
+
+ lomac_copy(source, dest);
+ /*
+ * If there's an auxiliary label on the real object, respect it and
+ * assume that this level should be assumed immediately if a higher
+ * level is currently in place.
+ */
+ if (robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
+ !lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single)
+ && lomac_auxsingle_in_range(robj, dest))
+ lomac_set_single(dest, robj->ml_auxsingle.mle_type,
+ robj->ml_auxsingle.mle_grade);
+ /*
+ * Restructuring to use the execve transitioning mechanism instead of
+ * the normal demotion mechanism here would be difficult, so just
+ * copy the label over and perform standard demotion. This is also
+ * non-optimal because it will result in the intermediate label "new"
+ * being created and immediately recycled.
+ */
+ if (lomac_enabled && revocation_enabled &&
+ !lomac_dominate_single(obj, source))
+ (void)maybe_demote(source, obj, "executing", "file", vp);
+}
+
+static int
+lomac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp,
+ struct label *vplabel, struct label *interpvplabel,
+ struct image_params *imgp, struct label *execlabel)
+{
+ struct mac_lomac *subj, *obj, *robj;
+
+ if (!lomac_enabled || !revocation_enabled)
+ return (0);
+
+ subj = SLOT(old->cr_label);
+ obj = SLOT(vplabel);
+ robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
+
+ return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
+ !lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single)
+ && lomac_auxsingle_in_range(robj, subj)) ||
+ !lomac_dominate_single(obj, subj));
+}
+
+static void
+lomac_vnode_relabel(struct ucred *cred, struct vnode *vp,
+ struct label *vplabel, struct label *newlabel)
+{
+ struct mac_lomac *source, *dest;
+
+ source = SLOT(newlabel);
+ dest = SLOT(vplabel);
+
+ try_relabel(source, dest);
+}
+
+static int
+lomac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
+ struct label *vplabel, struct label *intlabel)
+{
+ struct mac_lomac *source, temp;
+ size_t buflen;
+ int error;
+
+ buflen = sizeof(temp);
+ bzero(&temp, buflen);
+
+ source = SLOT(intlabel);
+ if ((source->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
+ return (0);
+
+ lomac_copy_single(source, &temp);
+ error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
+ MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
+ return (error);
}
static struct mac_policy_ops lomac_ops =
{
.mpo_init = lomac_init,
- .mpo_bpfdesc_init_label = lomac_init_label,
- .mpo_cred_init_label = lomac_init_label,
- .mpo_devfs_init_label = lomac_init_label,
- .mpo_ifnet_init_label = lomac_init_label,
- .mpo_syncache_init_label = lomac_init_label_waitcheck,
- .mpo_inpcb_init_label = lomac_init_label_waitcheck,
- .mpo_ipq_init_label = lomac_init_label_waitcheck,
- .mpo_mbuf_init_label = lomac_init_label_waitcheck,
- .mpo_mount_init_label = lomac_init_label,
- .mpo_pipe_init_label = lomac_init_label,
- .mpo_proc_init_label = lomac_proc_init_label,
- .mpo_socket_init_label = lomac_init_label_waitcheck,
- .mpo_socketpeer_init_label = lomac_init_label_waitcheck,
- .mpo_vnode_init_label = lomac_init_label,
- .mpo_syncache_create = lomac_syncache_create,
+
+ .mpo_bpfdesc_check_receive = lomac_bpfdesc_check_receive,
+ .mpo_bpfdesc_create = lomac_bpfdesc_create,
+ .mpo_bpfdesc_create_mbuf = lomac_bpfdesc_create_mbuf,
.mpo_bpfdesc_destroy_label = lomac_destroy_label,
- .mpo_cred_destroy_label = lomac_destroy_label,
- .mpo_devfs_destroy_label = lomac_destroy_label,
- .mpo_ifnet_destroy_label = lomac_destroy_label,
- .mpo_inpcb_destroy_label = lomac_destroy_label,
- .mpo_ipq_destroy_label = lomac_destroy_label,
- .mpo_mbuf_destroy_label = lomac_destroy_label,
- .mpo_mount_destroy_label = lomac_destroy_label,
- .mpo_pipe_destroy_label = lomac_destroy_label,
- .mpo_proc_destroy_label = lomac_proc_destroy_label,
- .mpo_syncache_destroy_label = lomac_destroy_label,
- .mpo_socket_destroy_label = lomac_destroy_label,
- .mpo_socketpeer_destroy_label = lomac_destroy_label,
- .mpo_vnode_destroy_label = lomac_destroy_label,
+ .mpo_bpfdesc_init_label = lomac_init_label,
+
+ .mpo_cred_check_relabel = lomac_cred_check_relabel,
+ .mpo_cred_check_visible = lomac_cred_check_visible,
.mpo_cred_copy_label = lomac_copy_label,
- .mpo_ifnet_copy_label = lomac_copy_label,
- .mpo_mbuf_copy_label = lomac_copy_label,
- .mpo_pipe_copy_label = lomac_copy_label,
- .mpo_socket_copy_label = lomac_copy_label,
- .mpo_vnode_copy_label = lomac_copy_label,
+ .mpo_cred_destroy_label = lomac_destroy_label,
.mpo_cred_externalize_label = lomac_externalize_label,
- .mpo_ifnet_externalize_label = lomac_externalize_label,
- .mpo_pipe_externalize_label = lomac_externalize_label,
- .mpo_socket_externalize_label = lomac_externalize_label,
- .mpo_socketpeer_externalize_label = lomac_externalize_label,
- .mpo_vnode_externalize_label = lomac_externalize_label,
+ .mpo_cred_init_label = lomac_init_label,
.mpo_cred_internalize_label = lomac_internalize_label,
- .mpo_ifnet_internalize_label = lomac_internalize_label,
- .mpo_pipe_internalize_label = lomac_internalize_label,
- .mpo_socket_internalize_label = lomac_internalize_label,
- .mpo_vnode_internalize_label = lomac_internalize_label,
+ .mpo_cred_relabel = lomac_cred_relabel,
+
.mpo_devfs_create_device = lomac_devfs_create_device,
.mpo_devfs_create_directory = lomac_devfs_create_directory,
.mpo_devfs_create_symlink = lomac_devfs_create_symlink,
- .mpo_mount_create = lomac_mount_create,
- .mpo_vnode_relabel = lomac_vnode_relabel,
+ .mpo_devfs_destroy_label = lomac_destroy_label,
+ .mpo_devfs_init_label = lomac_init_label,
.mpo_devfs_update = lomac_devfs_update,
.mpo_devfs_vnode_associate = lomac_devfs_vnode_associate,
- .mpo_vnode_associate_extattr = lomac_vnode_associate_extattr,
- .mpo_vnode_associate_singlelabel = lomac_vnode_associate_singlelabel,
- .mpo_vnode_create_extattr = lomac_vnode_create_extattr,
- .mpo_vnode_setlabel_extattr = lomac_vnode_setlabel_extattr,
- .mpo_socket_create_mbuf = lomac_socket_create_mbuf,
- .mpo_syncache_create_mbuf = lomac_syncache_create_mbuf,
- .mpo_pipe_create = lomac_pipe_create,
- .mpo_socket_create = lomac_socket_create,
- .mpo_socket_newconn = lomac_socket_newconn,
- .mpo_pipe_relabel = lomac_pipe_relabel,
- .mpo_socket_relabel = lomac_socket_relabel,
- .mpo_socketpeer_set_from_mbuf = lomac_socketpeer_set_from_mbuf,
- .mpo_socketpeer_set_from_socket = lomac_socketpeer_set_from_socket,
- .mpo_bpfdesc_create = lomac_bpfdesc_create,
- .mpo_ipq_reassemble = lomac_ipq_reassemble,
- .mpo_netinet_fragment = lomac_netinet_fragment,
+
+ .mpo_ifnet_check_relabel = lomac_ifnet_check_relabel,
+ .mpo_ifnet_check_transmit = lomac_ifnet_check_transmit,
+ .mpo_ifnet_copy_label = lomac_copy_label,
.mpo_ifnet_create = lomac_ifnet_create,
+ .mpo_ifnet_create_mbuf = lomac_ifnet_create_mbuf,
+ .mpo_ifnet_destroy_label = lomac_destroy_label,
+ .mpo_ifnet_externalize_label = lomac_externalize_label,
+ .mpo_ifnet_init_label = lomac_init_label,
+ .mpo_ifnet_internalize_label = lomac_internalize_label,
+ .mpo_ifnet_relabel = lomac_ifnet_relabel,
+
+ .mpo_syncache_create = lomac_syncache_create,
+ .mpo_syncache_destroy_label = lomac_destroy_label,
+ .mpo_syncache_init_label = lomac_init_label_waitcheck,
+
+ .mpo_inpcb_check_deliver = lomac_inpcb_check_deliver,
.mpo_inpcb_create = lomac_inpcb_create,
- .mpo_ipq_create = lomac_ipq_create,
.mpo_inpcb_create_mbuf = lomac_inpcb_create_mbuf,
- .mpo_bpfdesc_create_mbuf = lomac_bpfdesc_create_mbuf,
- .mpo_ifnet_create_mbuf = lomac_ifnet_create_mbuf,
+ .mpo_inpcb_destroy_label = lomac_destroy_label,
+ .mpo_inpcb_init_label = lomac_init_label_waitcheck,
+ .mpo_inpcb_sosetlabel = lomac_inpcb_sosetlabel,
+
+ .mpo_ipq_create = lomac_ipq_create,
+ .mpo_ipq_destroy_label = lomac_destroy_label,
+ .mpo_ipq_init_label = lomac_init_label_waitcheck,
.mpo_ipq_match = lomac_ipq_match,
- .mpo_ifnet_relabel = lomac_ifnet_relabel,
+ .mpo_ipq_reassemble = lomac_ipq_reassemble,
.mpo_ipq_update = lomac_ipq_update,
- .mpo_inpcb_sosetlabel = lomac_inpcb_sosetlabel,
- .mpo_vnode_execve_transition = lomac_vnode_execve_transition,
- .mpo_vnode_execve_will_transition =
- lomac_vnode_execve_will_transition,
- .mpo_proc_create_swapper = lomac_proc_create_swapper,
- .mpo_proc_create_init = lomac_proc_create_init,
- .mpo_cred_relabel = lomac_cred_relabel,
- .mpo_bpfdesc_check_receive = lomac_bpfdesc_check_receive,
- .mpo_cred_check_relabel = lomac_cred_check_relabel,
- .mpo_cred_check_visible = lomac_cred_check_visible,
- .mpo_ifnet_check_relabel = lomac_ifnet_check_relabel,
- .mpo_ifnet_check_transmit = lomac_ifnet_check_transmit,
- .mpo_inpcb_check_deliver = lomac_inpcb_check_deliver,
+
.mpo_kld_check_load = lomac_kld_check_load,
+
+ .mpo_mbuf_copy_label = lomac_copy_label,
+ .mpo_mbuf_destroy_label = lomac_destroy_label,
+ .mpo_mbuf_init_label = lomac_init_label_waitcheck,
+
+ .mpo_mount_create = lomac_mount_create,
+ .mpo_mount_destroy_label = lomac_destroy_label,
+ .mpo_mount_init_label = lomac_init_label,
+
+ .mpo_netatalk_aarp_send = lomac_netatalk_aarp_send,
+
+ .mpo_netinet_arp_send = lomac_netinet_arp_send,
+ .mpo_netinet_firewall_reply = lomac_netinet_firewall_reply,
+ .mpo_netinet_firewall_send = lomac_netinet_firewall_send,
+ .mpo_netinet_fragment = lomac_netinet_fragment,
+ .mpo_netinet_icmp_reply = lomac_netinet_icmp_reply,
+ .mpo_netinet_igmp_send = lomac_netinet_igmp_send,
+
+ .mpo_netinet6_nd6_send = lomac_netinet6_nd6_send,
+
.mpo_pipe_check_ioctl = lomac_pipe_check_ioctl,
.mpo_pipe_check_read = lomac_pipe_check_read,
.mpo_pipe_check_relabel = lomac_pipe_check_relabel,
.mpo_pipe_check_write = lomac_pipe_check_write,
+ .mpo_pipe_copy_label = lomac_copy_label,
+ .mpo_pipe_create = lomac_pipe_create,
+ .mpo_pipe_destroy_label = lomac_destroy_label,
+ .mpo_pipe_externalize_label = lomac_externalize_label,
+ .mpo_pipe_init_label = lomac_init_label,
+ .mpo_pipe_internalize_label = lomac_internalize_label,
+ .mpo_pipe_relabel = lomac_pipe_relabel,
+
+ .mpo_priv_check = lomac_priv_check,
+
.mpo_proc_check_debug = lomac_proc_check_debug,
.mpo_proc_check_sched = lomac_proc_check_sched,
.mpo_proc_check_signal = lomac_proc_check_signal,
+ .mpo_proc_create_swapper = lomac_proc_create_swapper,
+ .mpo_proc_create_init = lomac_proc_create_init,
+ .mpo_proc_destroy_label = lomac_proc_destroy_label,
+ .mpo_proc_init_label = lomac_proc_init_label,
+
.mpo_socket_check_deliver = lomac_socket_check_deliver,
.mpo_socket_check_relabel = lomac_socket_check_relabel,
.mpo_socket_check_visible = lomac_socket_check_visible,
+ .mpo_socket_copy_label = lomac_copy_label,
+ .mpo_socket_create = lomac_socket_create,
+ .mpo_socket_create_mbuf = lomac_socket_create_mbuf,
+ .mpo_socket_destroy_label = lomac_destroy_label,
+ .mpo_socket_externalize_label = lomac_externalize_label,
+ .mpo_socket_init_label = lomac_init_label_waitcheck,
+ .mpo_socket_internalize_label = lomac_internalize_label,
+ .mpo_socket_newconn = lomac_socket_newconn,
+ .mpo_socket_relabel = lomac_socket_relabel,
+
+ .mpo_socketpeer_destroy_label = lomac_destroy_label,
+ .mpo_socketpeer_externalize_label = lomac_externalize_label,
+ .mpo_socketpeer_init_label = lomac_init_label_waitcheck,
+ .mpo_socketpeer_set_from_mbuf = lomac_socketpeer_set_from_mbuf,
+ .mpo_socketpeer_set_from_socket = lomac_socketpeer_set_from_socket,
+
+ .mpo_syncache_create_mbuf = lomac_syncache_create_mbuf,
+
.mpo_system_check_acct = lomac_system_check_acct,
.mpo_system_check_auditctl = lomac_system_check_auditctl,
.mpo_system_check_swapoff = lomac_system_check_swapoff,
.mpo_system_check_swapon = lomac_system_check_swapon,
.mpo_system_check_sysctl = lomac_system_check_sysctl,
+
+ .mpo_thread_userret = lomac_thread_userret,
+
+ .mpo_vnode_associate_extattr = lomac_vnode_associate_extattr,
+ .mpo_vnode_associate_singlelabel = lomac_vnode_associate_singlelabel,
.mpo_vnode_check_access = lomac_vnode_check_open,
.mpo_vnode_check_create = lomac_vnode_check_create,
.mpo_vnode_check_deleteacl = lomac_vnode_check_deleteacl,
@@ -2964,15 +2970,16 @@ static struct mac_policy_ops lomac_ops =
.mpo_vnode_check_setutimes = lomac_vnode_check_setutimes,
.mpo_vnode_check_unlink = lomac_vnode_check_unlink,
.mpo_vnode_check_write = lomac_vnode_check_write,
- .mpo_thread_userret = lomac_thread_userret,
- .mpo_netatalk_aarp_send = lomac_netatalk_aarp_send,
- .mpo_netinet_arp_send = lomac_netinet_arp_send,
- .mpo_netinet_firewall_reply = lomac_netinet_firewall_reply,
- .mpo_netinet_firewall_send = lomac_netinet_firewall_send,
- .mpo_netinet_icmp_reply = lomac_netinet_icmp_reply,
- .mpo_netinet_igmp_send = lomac_netinet_igmp_send,
- .mpo_netinet6_nd6_send = lomac_netinet6_nd6_send,
- .mpo_priv_check = lomac_priv_check,
+ .mpo_vnode_copy_label = lomac_copy_label,
+ .mpo_vnode_create_extattr = lomac_vnode_create_extattr,
+ .mpo_vnode_destroy_label = lomac_destroy_label,
+ .mpo_vnode_execve_transition = lomac_vnode_execve_transition,
+ .mpo_vnode_execve_will_transition = lomac_vnode_execve_will_transition,
+ .mpo_vnode_externalize_label = lomac_externalize_label,
+ .mpo_vnode_init_label = lomac_init_label,
+ .mpo_vnode_internalize_label = lomac_internalize_label,
+ .mpo_vnode_relabel = lomac_vnode_relabel,
+ .mpo_vnode_setlabel_extattr = lomac_vnode_setlabel_extattr,
};
MAC_POLICY_SET(&lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC",
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