/*- * Copyright (c) 1999-2002 Robert N. M. Watson * Copyright (c) 2001-2005 McAfee, Inc. * All rights reserved. * * This software was developed by Robert Watson for the TrustedBSD Project. * * This software was developed for the FreeBSD Project in part by McAfee * Research, the Security Research Division of McAfee, Inc. under * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA * CHATS research program. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ /* * Developed by the TrustedBSD Project. * * MLS fixed label mandatory confidentiality policy. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include SYSCTL_DECL(_security_mac); SYSCTL_NODE(_security_mac, OID_AUTO, mls, CTLFLAG_RW, 0, "TrustedBSD mac_mls policy controls"); static int mls_label_size = sizeof(struct mac_mls); SYSCTL_INT(_security_mac_mls, OID_AUTO, label_size, CTLFLAG_RD, &mls_label_size, 0, "Size of struct mac_mls"); static int mls_enabled = 1; SYSCTL_INT(_security_mac_mls, OID_AUTO, enabled, CTLFLAG_RW, &mls_enabled, 0, "Enforce MAC/MLS policy"); TUNABLE_INT("security.mac.mls.enabled", &mls_enabled); static int destroyed_not_inited; SYSCTL_INT(_security_mac_mls, OID_AUTO, destroyed_not_inited, CTLFLAG_RD, &destroyed_not_inited, 0, "Count of labels destroyed but not inited"); static int ptys_equal = 0; SYSCTL_INT(_security_mac_mls, OID_AUTO, ptys_equal, CTLFLAG_RW, &ptys_equal, 0, "Label pty devices as mls/equal on create"); TUNABLE_INT("security.mac.mls.ptys_equal", &ptys_equal); static int revocation_enabled = 0; SYSCTL_INT(_security_mac_mls, OID_AUTO, revocation_enabled, CTLFLAG_RW, &revocation_enabled, 0, "Revoke access to objects on relabel"); TUNABLE_INT("security.mac.mls.revocation_enabled", &revocation_enabled); static int max_compartments = MAC_MLS_MAX_COMPARTMENTS; SYSCTL_INT(_security_mac_mls, OID_AUTO, max_compartments, CTLFLAG_RD, &max_compartments, 0, "Maximum compartments the policy supports"); static int mls_slot; #define SLOT(l) ((struct mac_mls *)mac_label_get((l), mls_slot)) #define SLOT_SET(l, val) mac_label_set((l), mls_slot, (uintptr_t)(val)) static uma_zone_t zone_mls; static __inline int mls_bit_set_empty(u_char *set) { int i; for (i = 0; i < MAC_MLS_MAX_COMPARTMENTS >> 3; i++) if (set[i] != 0) return (0); return (1); } static struct mac_mls * mls_alloc(int flag) { return (uma_zalloc(zone_mls, flag | M_ZERO)); } static void mls_free(struct mac_mls *mm) { if (mm != NULL) uma_zfree(zone_mls, mm); else atomic_add_int(&destroyed_not_inited, 1); } static int mls_atmostflags(struct mac_mls *mm, int flags) { if ((mm->mm_flags & flags) != mm->mm_flags) return (EINVAL); return (0); } static int mls_dominate_element(struct mac_mls_element *a, struct mac_mls_element *b) { int bit; switch (a->mme_type) { case MAC_MLS_TYPE_EQUAL: case MAC_MLS_TYPE_HIGH: return (1); case MAC_MLS_TYPE_LOW: switch (b->mme_type) { case MAC_MLS_TYPE_LEVEL: case MAC_MLS_TYPE_HIGH: return (0); case MAC_MLS_TYPE_EQUAL: case MAC_MLS_TYPE_LOW: return (1); default: panic("mls_dominate_element: b->mme_type invalid"); } case MAC_MLS_TYPE_LEVEL: switch (b->mme_type) { case MAC_MLS_TYPE_EQUAL: case MAC_MLS_TYPE_LOW: return (1); case MAC_MLS_TYPE_HIGH: return (0); case MAC_MLS_TYPE_LEVEL: for (bit = 1; bit <= MAC_MLS_MAX_COMPARTMENTS; bit++) if (!MAC_MLS_BIT_TEST(bit, a->mme_compartments) && MAC_MLS_BIT_TEST(bit, b->mme_compartments)) return (0); return (a->mme_level >= b->mme_level); default: panic("mls_dominate_element: b->mme_type invalid"); } default: panic("mls_dominate_element: a->mme_type invalid"); } return (0); } static int mls_range_in_range(struct mac_mls *rangea, struct mac_mls *rangeb) { return (mls_dominate_element(&rangeb->mm_rangehigh, &rangea->mm_rangehigh) && mls_dominate_element(&rangea->mm_rangelow, &rangeb->mm_rangelow)); } static int mls_effective_in_range(struct mac_mls *effective, struct mac_mls *range) { KASSERT((effective->mm_flags & MAC_MLS_FLAG_EFFECTIVE) != 0, ("mls_effective_in_range: a not effective")); KASSERT((range->mm_flags & MAC_MLS_FLAG_RANGE) != 0, ("mls_effective_in_range: b not range")); return (mls_dominate_element(&range->mm_rangehigh, &effective->mm_effective) && mls_dominate_element(&effective->mm_effective, &range->mm_rangelow)); return (1); } static int mls_dominate_effective(struct mac_mls *a, struct mac_mls *b) { KASSERT((a->mm_flags & MAC_MLS_FLAG_EFFECTIVE) != 0, ("mls_dominate_effective: a not effective")); KASSERT((b->mm_flags & MAC_MLS_FLAG_EFFECTIVE) != 0, ("mls_dominate_effective: b not effective")); return (mls_dominate_element(&a->mm_effective, &b->mm_effective)); } static int mls_equal_element(struct mac_mls_element *a, struct mac_mls_element *b) { if (a->mme_type == MAC_MLS_TYPE_EQUAL || b->mme_type == MAC_MLS_TYPE_EQUAL) return (1); return (a->mme_type == b->mme_type && a->mme_level == b->mme_level); } static int mls_equal_effective(struct mac_mls *a, struct mac_mls *b) { KASSERT((a->mm_flags & MAC_MLS_FLAG_EFFECTIVE) != 0, ("mls_equal_effective: a not effective")); KASSERT((b->mm_flags & MAC_MLS_FLAG_EFFECTIVE) != 0, ("mls_equal_effective: b not effective")); return (mls_equal_element(&a->mm_effective, &b->mm_effective)); } static int mls_contains_equal(struct mac_mls *mm) { if (mm->mm_flags & MAC_MLS_FLAG_EFFECTIVE) if (mm->mm_effective.mme_type == MAC_MLS_TYPE_EQUAL) return (1); if (mm->mm_flags & MAC_MLS_FLAG_RANGE) { if (mm->mm_rangelow.mme_type == MAC_MLS_TYPE_EQUAL) return (1); if (mm->mm_rangehigh.mme_type == MAC_MLS_TYPE_EQUAL) return (1); } return (0); } static int mls_subject_privileged(struct mac_mls *mm) { KASSERT((mm->mm_flags & MAC_MLS_FLAGS_BOTH) == MAC_MLS_FLAGS_BOTH, ("mls_subject_privileged: subject doesn't have both labels")); /* If the effective is EQUAL, it's ok. */ if (mm->mm_effective.mme_type == MAC_MLS_TYPE_EQUAL) return (0); /* If either range endpoint is EQUAL, it's ok. */ if (mm->mm_rangelow.mme_type == MAC_MLS_TYPE_EQUAL || mm->mm_rangehigh.mme_type == MAC_MLS_TYPE_EQUAL) return (0); /* If the range is low-high, it's ok. */ if (mm->mm_rangelow.mme_type == MAC_MLS_TYPE_LOW && mm->mm_rangehigh.mme_type == MAC_MLS_TYPE_HIGH) return (0); /* It's not ok. */ return (EPERM); } static int mls_valid(struct mac_mls *mm) { if (mm->mm_flags & MAC_MLS_FLAG_EFFECTIVE) { switch (mm->mm_effective.mme_type) { case MAC_MLS_TYPE_LEVEL: break; case MAC_MLS_TYPE_EQUAL: case MAC_MLS_TYPE_HIGH: case MAC_MLS_TYPE_LOW: if (mm->mm_effective.mme_level != 0 || !MAC_MLS_BIT_SET_EMPTY( mm->mm_effective.mme_compartments)) return (EINVAL); break; default: return (EINVAL); } } else { if (mm->mm_effective.mme_type != MAC_MLS_TYPE_UNDEF) return (EINVAL); } if (mm->mm_flags & MAC_MLS_FLAG_RANGE) { switch (mm->mm_rangelow.mme_type) { case MAC_MLS_TYPE_LEVEL: break; case MAC_MLS_TYPE_EQUAL: case MAC_MLS_TYPE_HIGH: case MAC_MLS_TYPE_LOW: if (mm->mm_rangelow.mme_level != 0 || !MAC_MLS_BIT_SET_EMPTY( mm->mm_rangelow.mme_compartments)) return (EINVAL); break; default: return (EINVAL); } switch (mm->mm_rangehigh.mme_type) { case MAC_MLS_TYPE_LEVEL: break; case MAC_MLS_TYPE_EQUAL: case MAC_MLS_TYPE_HIGH: case MAC_MLS_TYPE_LOW: if (mm->mm_rangehigh.mme_level != 0 || !MAC_MLS_BIT_SET_EMPTY( mm->mm_rangehigh.mme_compartments)) return (EINVAL); break; default: return (EINVAL); } if (!mls_dominate_element(&mm->mm_rangehigh, &mm->mm_rangelow)) return (EINVAL); } else { if (mm->mm_rangelow.mme_type != MAC_MLS_TYPE_UNDEF || mm->mm_rangehigh.mme_type != MAC_MLS_TYPE_UNDEF) return (EINVAL); } return (0); } static void mls_set_range(struct mac_mls *mm, u_short typelow, u_short levellow, u_char *compartmentslow, u_short typehigh, u_short levelhigh, u_char *compartmentshigh) { mm->mm_rangelow.mme_type = typelow; mm->mm_rangelow.mme_level = levellow; if (compartmentslow != NULL) memcpy(mm->mm_rangelow.mme_compartments, compartmentslow, sizeof(mm->mm_rangelow.mme_compartments)); mm->mm_rangehigh.mme_type = typehigh; mm->mm_rangehigh.mme_level = levelhigh; if (compartmentshigh != NULL) memcpy(mm->mm_rangehigh.mme_compartments, compartmentshigh, sizeof(mm->mm_rangehigh.mme_compartments)); mm->mm_flags |= MAC_MLS_FLAG_RANGE; } static void mls_set_effective(struct mac_mls *mm, u_short type, u_short level, u_char *compartments) { mm->mm_effective.mme_type = type; mm->mm_effective.mme_level = level; if (compartments != NULL) memcpy(mm->mm_effective.mme_compartments, compartments, sizeof(mm->mm_effective.mme_compartments)); mm->mm_flags |= MAC_MLS_FLAG_EFFECTIVE; } static void mls_copy_range(struct mac_mls *labelfrom, struct mac_mls *labelto) { KASSERT((labelfrom->mm_flags & MAC_MLS_FLAG_RANGE) != 0, ("mls_copy_range: labelfrom not range")); labelto->mm_rangelow = labelfrom->mm_rangelow; labelto->mm_rangehigh = labelfrom->mm_rangehigh; labelto->mm_flags |= MAC_MLS_FLAG_RANGE; } static void mls_copy_effective(struct mac_mls *labelfrom, struct mac_mls *labelto) { KASSERT((labelfrom->mm_flags & MAC_MLS_FLAG_EFFECTIVE) != 0, ("mls_copy_effective: labelfrom not effective")); labelto->mm_effective = labelfrom->mm_effective; labelto->mm_flags |= MAC_MLS_FLAG_EFFECTIVE; } static void mls_copy(struct mac_mls *source, struct mac_mls *dest) { if (source->mm_flags & MAC_MLS_FLAG_EFFECTIVE) mls_copy_effective(source, dest); if (source->mm_flags & MAC_MLS_FLAG_RANGE) mls_copy_range(source, dest); } /* * Policy module operations. */ static void mls_init(struct mac_policy_conf *conf) { zone_mls = uma_zcreate("mac_mls", sizeof(struct mac_mls), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); } /* * Label operations. */ static void mls_init_label(struct label *label) { SLOT_SET(label, mls_alloc(M_WAITOK)); } static int mls_init_label_waitcheck(struct label *label, int flag) { SLOT_SET(label, mls_alloc(flag)); if (SLOT(label) == NULL) return (ENOMEM); return (0); } static void mls_destroy_label(struct label *label) { mls_free(SLOT(label)); SLOT_SET(label, NULL); } /* * mls_element_to_string() accepts an sbuf and MLS element. It converts the * MLS element to a string and stores the result in the sbuf; if there isn't * space in the sbuf, -1 is returned. */ static int mls_element_to_string(struct sbuf *sb, struct mac_mls_element *element) { int i, first; switch (element->mme_type) { case MAC_MLS_TYPE_HIGH: return (sbuf_printf(sb, "high")); case MAC_MLS_TYPE_LOW: return (sbuf_printf(sb, "low")); case MAC_MLS_TYPE_EQUAL: return (sbuf_printf(sb, "equal")); case MAC_MLS_TYPE_LEVEL: if (sbuf_printf(sb, "%d", element->mme_level) == -1) return (-1); first = 1; for (i = 1; i <= MAC_MLS_MAX_COMPARTMENTS; i++) { if (MAC_MLS_BIT_TEST(i, element->mme_compartments)) { if (first) { if (sbuf_putc(sb, ':') == -1) return (-1); if (sbuf_printf(sb, "%d", i) == -1) return (-1); first = 0; } else { if (sbuf_printf(sb, "+%d", i) == -1) return (-1); } } } return (0); default: panic("mls_element_to_string: invalid type (%d)", element->mme_type); } } /* * mls_to_string() converts an MLS label to a string, and places the results * in the passed sbuf. It returns 0 on success, or EINVAL if there isn't * room in the sbuf. Note: the sbuf will be modified even in a failure case, * so the caller may need to revert the sbuf by restoring the offset if * that's undesired. */ static int mls_to_string(struct sbuf *sb, struct mac_mls *mm) { if (mm->mm_flags & MAC_MLS_FLAG_EFFECTIVE) { if (mls_element_to_string(sb, &mm->mm_effective) == -1) return (EINVAL); } if (mm->mm_flags & MAC_MLS_FLAG_RANGE) { if (sbuf_putc(sb, '(') == -1) return (EINVAL); if (mls_element_to_string(sb, &mm->mm_rangelow) == -1) return (EINVAL); if (sbuf_putc(sb, '-') == -1) return (EINVAL); if (mls_element_to_string(sb, &mm->mm_rangehigh) == -1) return (EINVAL); if (sbuf_putc(sb, ')') == -1) return (EINVAL); } return (0); } static int mls_externalize_label(struct label *label, char *element_name, struct sbuf *sb, int *claimed) { struct mac_mls *mm; if (strcmp(MAC_MLS_LABEL_NAME, element_name) != 0) return (0); (*claimed)++; mm = SLOT(label); return (mls_to_string(sb, mm)); } static int mls_parse_element(struct mac_mls_element *element, char *string) { char *compartment, *end, *level; int value; if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) { element->mme_type = MAC_MLS_TYPE_HIGH; element->mme_level = MAC_MLS_TYPE_UNDEF; } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) { element->mme_type = MAC_MLS_TYPE_LOW; element->mme_level = MAC_MLS_TYPE_UNDEF; } else if (strcmp(string, "equal") == 0 || strcmp(string, "eq") == 0) { element->mme_type = MAC_MLS_TYPE_EQUAL; element->mme_level = MAC_MLS_TYPE_UNDEF; } else { element->mme_type = MAC_MLS_TYPE_LEVEL; /* * Numeric level piece of the element. */ level = strsep(&string, ":"); value = strtol(level, &end, 10); if (end == level || *end != '\0') return (EINVAL); if (value < 0 || value > 65535) return (EINVAL); element->mme_level = value; /* * Optional compartment piece of the element. If none are * included, we assume that the label has no compartments. */ if (string == NULL) return (0); if (*string == '\0') return (0); while ((compartment = strsep(&string, "+")) != NULL) { value = strtol(compartment, &end, 10); if (compartment == end || *end != '\0') return (EINVAL); if (value < 1 || value > MAC_MLS_MAX_COMPARTMENTS) return (EINVAL); MAC_MLS_BIT_SET(value, element->mme_compartments); } } return (0); } /* * Note: destructively consumes the string, make a local copy before calling * if that's a problem. */ static int mls_parse(struct mac_mls *mm, char *string) { char *rangehigh, *rangelow, *effective; int error; effective = strsep(&string, "("); if (*effective == '\0') effective = NULL; if (string != NULL) { rangelow = strsep(&string, "-"); if (string == NULL) return (EINVAL); rangehigh = strsep(&string, ")"); if (string == NULL) return (EINVAL); if (*string != '\0') return (EINVAL); } else { rangelow = NULL; rangehigh = NULL; } KASSERT((rangelow != NULL && rangehigh != NULL) || (rangelow == NULL && rangehigh == NULL), ("mls_parse: range mismatch")); bzero(mm, sizeof(*mm)); if (effective != NULL) { error = mls_parse_element(&mm->mm_effective, effective); if (error) return (error); mm->mm_flags |= MAC_MLS_FLAG_EFFECTIVE; } if (rangelow != NULL) { error = mls_parse_element(&mm->mm_rangelow, rangelow); if (error) return (error); error = mls_parse_element(&mm->mm_rangehigh, rangehigh); if (error) return (error); mm->mm_flags |= MAC_MLS_FLAG_RANGE; } error = mls_valid(mm); if (error) return (error); return (0); } static int mls_internalize_label(struct label *label, char *element_name, char *element_data, int *claimed) { struct mac_mls *mm, mm_temp; int error; if (strcmp(MAC_MLS_LABEL_NAME, element_name) != 0) return (0); (*claimed)++; error = mls_parse(&mm_temp, element_data); if (error) return (error); mm = SLOT(label); *mm = mm_temp; return (0); } static void mls_copy_label(struct label *src, struct label *dest) { *SLOT(dest) = *SLOT(src); } /* * Labeling event operations: file system objects, and things that look a lot * like file system objects. */ static void mls_create_devfs_device(struct ucred *cred, struct mount *mp, struct cdev *dev, struct devfs_dirent *de, struct label *delabel) { struct mac_mls *mm; int mls_type; mm = 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) mls_type = MAC_MLS_TYPE_EQUAL; else if (strcmp(dev->si_name, "kmem") == 0 || strcmp(dev->si_name, "mem") == 0) mls_type = MAC_MLS_TYPE_HIGH; else if (ptys_equal && (strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 || strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0)) mls_type = MAC_MLS_TYPE_EQUAL; else mls_type = MAC_MLS_TYPE_LOW; mls_set_effective(mm, mls_type, 0, NULL); } static void mls_create_devfs_directory(struct mount *mp, char *dirname, int dirnamelen, struct devfs_dirent *de, struct label *delabel) { struct mac_mls *mm; mm = SLOT(delabel); mls_set_effective(mm, MAC_MLS_TYPE_LOW, 0, NULL); } static void mls_create_devfs_symlink(struct ucred *cred, struct mount *mp, struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de, struct label *delabel) { struct mac_mls *source, *dest; source = SLOT(cred->cr_label); dest = SLOT(delabel); mls_copy_effective(source, dest); } static void mls_create_mount(struct ucred *cred, struct mount *mp, struct label *mplabel) { struct mac_mls *source, *dest; source = SLOT(cred->cr_label); dest = SLOT(mplabel); mls_copy_effective(source, dest); } static void mls_relabel_vnode(struct ucred *cred, struct vnode *vp, struct label *vplabel, struct label *label) { struct mac_mls *source, *dest; source = SLOT(label); dest = SLOT(vplabel); mls_copy(source, dest); } static void mls_update_devfs(struct mount *mp, struct devfs_dirent *de, struct label *delabel, struct vnode *vp, struct label *vplabel) { struct mac_mls *source, *dest; source = SLOT(vplabel); dest = SLOT(delabel); mls_copy_effective(source, dest); } static void mls_associate_vnode_devfs(struct mount *mp, struct label *mplabel, struct devfs_dirent *de, struct label *delabel, struct vnode *vp, struct label *vplabel) { struct mac_mls *source, *dest; source = SLOT(delabel); dest = SLOT(vplabel); mls_copy_effective(source, dest); } static int mls_associate_vnode_extattr(struct mount *mp, struct label *mplabel, struct vnode *vp, struct label *vplabel) { struct mac_mls temp, *source, *dest; int buflen, error; source = SLOT(mplabel); dest = SLOT(vplabel); buflen = sizeof(temp); bzero(&temp, buflen); error = vn_extattr_get(vp, IO_NODELOCKED, MAC_MLS_EXTATTR_NAMESPACE, MAC_MLS_EXTATTR_NAME, &buflen, (char *) &temp, curthread); if (error == ENOATTR || error == EOPNOTSUPP) { /* Fall back to the mntlabel. */ mls_copy_effective(source, dest); return (0); } else if (error) return (error); if (buflen != sizeof(temp)) { printf("mls_associate_vnode_extattr: bad size %d\n", buflen); return (EPERM); } if (mls_valid(&temp) != 0) { printf("mls_associate_vnode_extattr: invalid\n"); return (EPERM); } if ((temp.mm_flags & MAC_MLS_FLAGS_BOTH) != MAC_MLS_FLAG_EFFECTIVE) { printf("mls_associated_vnode_extattr: not effective\n"); return (EPERM); } mls_copy_effective(&temp, dest); return (0); } static void mls_associate_vnode_singlelabel(struct mount *mp, struct label *mplabel, struct vnode *vp, struct label *vplabel) { struct mac_mls *source, *dest; source = SLOT(mplabel); dest = SLOT(vplabel); mls_copy_effective(source, dest); } static int mls_create_vnode_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_mls *source, *dest, temp; size_t buflen; int error; buflen = sizeof(temp); bzero(&temp, buflen); source = SLOT(cred->cr_label); dest = SLOT(vplabel); mls_copy_effective(source, &temp); error = vn_extattr_set(vp, IO_NODELOCKED, MAC_MLS_EXTATTR_NAMESPACE, MAC_MLS_EXTATTR_NAME, buflen, (char *) &temp, curthread); if (error == 0) mls_copy_effective(source, dest); return (error); } static int mls_setlabel_vnode_extattr(struct ucred *cred, struct vnode *vp, struct label *vplabel, struct label *intlabel) { struct mac_mls *source, temp; size_t buflen; int error; buflen = sizeof(temp); bzero(&temp, buflen); source = SLOT(intlabel); if ((source->mm_flags & MAC_MLS_FLAG_EFFECTIVE) == 0) return (0); mls_copy_effective(source, &temp); error = vn_extattr_set(vp, IO_NODELOCKED, MAC_MLS_EXTATTR_NAMESPACE, MAC_MLS_EXTATTR_NAME, buflen, (char *) &temp, curthread); return (error); } /* * Labeling event operations: IPC object. */ static void mls_create_inpcb_from_socket(struct socket *so, struct label *solabel, struct inpcb *inp, struct label *inplabel) { struct mac_mls *source, *dest; source = SLOT(solabel); dest = SLOT(inplabel); mls_copy_effective(source, dest); } static void mls_create_mbuf_from_socket(struct socket *so, struct label *solabel, struct mbuf *m, struct label *mlabel) { struct mac_mls *source, *dest; source = SLOT(solabel); dest = SLOT(mlabel); mls_copy_effective(source, dest); } static void mls_create_socket(struct ucred *cred, struct socket *so, struct label *solabel) { struct mac_mls *source, *dest; source = SLOT(cred->cr_label); dest = SLOT(solabel); mls_copy_effective(source, dest); } static void mls_create_pipe(struct ucred *cred, struct pipepair *pp, struct label *pplabel) { struct mac_mls *source, *dest; source = SLOT(cred->cr_label); dest = SLOT(pplabel); mls_copy_effective(source, dest); } static void mls_create_posix_sem(struct ucred *cred, struct ksem *ks, struct label *kslabel) { struct mac_mls *source, *dest; source = SLOT(cred->cr_label); dest = SLOT(kslabel); mls_copy_effective(source, dest); } static void mls_create_socket_from_socket(struct socket *oldso, struct label *oldsolabel, struct socket *newso, struct label *newsolabel) { struct mac_mls *source, *dest; source = SLOT(oldsolabel); dest = SLOT(newsolabel); mls_copy_effective(source, dest); } static void mls_relabel_socket(struct ucred *cred, struct socket *so, struct label *solabel, struct label *newlabel) { struct mac_mls *source, *dest; source = SLOT(newlabel); dest = SLOT(solabel); mls_copy(source, dest); } static void mls_relabel_pipe(struct ucred *cred, struct pipepair *pp, struct label *pplabel, struct label *newlabel) { struct mac_mls *source, *dest; source = SLOT(newlabel); dest = SLOT(pplabel); mls_copy(source, dest); } static void mls_set_socket_peer_from_mbuf(struct mbuf *m, struct label *mlabel, struct socket *so, struct label *sopeerlabel) { struct mac_mls *source, *dest; source = SLOT(mlabel); dest = SLOT(sopeerlabel); mls_copy_effective(source, dest); } /* * Labeling event operations: System V IPC objects. */ static void mls_create_sysv_msgmsg(struct ucred *cred, struct msqid_kernel *msqkptr, struct label *msqlabel, struct msg *msgptr, struct label *msglabel) { struct mac_mls *source, *dest; /* Ignore the msgq label. */ source = SLOT(cred->cr_label); dest = SLOT(msglabel); mls_copy_effective(source, dest); } static void mls_create_sysv_msgqueue(struct ucred *cred, struct msqid_kernel *msqkptr, struct label *msqlabel) { struct mac_mls *source, *dest; source = SLOT(cred->cr_label); dest = SLOT(msqlabel); mls_copy_effective(source, dest); } static void mls_create_sysv_sem(struct ucred *cred, struct semid_kernel *semakptr, struct label *semalabel) { struct mac_mls *source, *dest; source = SLOT(cred->cr_label); dest = SLOT(semalabel); mls_copy_effective(source, dest); } static void mls_create_sysv_shm(struct ucred *cred, struct shmid_kernel *shmsegptr, struct label *shmlabel) { struct mac_mls *source, *dest; source = SLOT(cred->cr_label); dest = SLOT(shmlabel); mls_copy_effective(source, dest); } /* * Labeling event operations: network objects. */ static void mls_set_socket_peer_from_socket(struct socket *oldso, struct label *oldsolabel, struct socket *newso, struct label *newsopeerlabel) { struct mac_mls *source, *dest; source = SLOT(oldsolabel); dest = SLOT(newsopeerlabel); mls_copy_effective(source, dest); } static void mls_create_bpfdesc(struct ucred *cred, struct bpf_d *d, struct label *dlabel) { struct mac_mls *source, *dest; source = SLOT(cred->cr_label); dest = SLOT(dlabel); mls_copy_effective(source, dest); } static void mls_create_ifnet(struct ifnet *ifp, struct label *ifplabel) { struct mac_mls *dest; int type; dest = SLOT(ifplabel); if (ifp->if_type == IFT_LOOP) type = MAC_MLS_TYPE_EQUAL; else type = MAC_MLS_TYPE_LOW; mls_set_effective(dest, type, 0, NULL); mls_set_range(dest, type, 0, NULL, type, 0, NULL); } static void mls_create_ipq(struct mbuf *m, struct label *mlabel, struct ipq *q, struct label *qlabel) { struct mac_mls *source, *dest; source = SLOT(mlabel); dest = SLOT(qlabel); mls_copy_effective(source, dest); } static void mls_create_datagram_from_ipq(struct ipq *q, struct label *qlabel, struct mbuf *m, struct label *mlabel) { struct mac_mls *source, *dest; source = SLOT(qlabel); dest = SLOT(mlabel); /* Just use the head, since we require them all to match. */ mls_copy_effective(source, dest); } static void mls_create_fragment(struct mbuf *m, struct label *mlabel, struct mbuf *frag, struct label *fraglabel) { struct mac_mls *source, *dest; source = SLOT(mlabel); dest = SLOT(fraglabel); mls_copy_effective(source, dest); } static void mls_create_mbuf_from_inpcb(struct inpcb *inp, struct label *inplabel, struct mbuf *m, struct label *mlabel) { struct mac_mls *source, *dest; source = SLOT(inplabel); dest = SLOT(mlabel); mls_copy_effective(source, dest); } static void mls_create_mbuf_linklayer(struct ifnet *ifp, struct label *ifplabel, struct mbuf *m, struct label *mlabel) { struct mac_mls *dest; dest = SLOT(mlabel); mls_set_effective(dest, MAC_MLS_TYPE_EQUAL, 0, NULL); } static void mls_create_mbuf_from_bpfdesc(struct bpf_d *d, struct label *dlabel, struct mbuf *m, struct label *mlabel) { struct mac_mls *source, *dest; source = SLOT(dlabel); dest = SLOT(mlabel); mls_copy_effective(source, dest); } static void mls_create_mbuf_from_ifnet(struct ifnet *ifp, struct label *ifplabel, struct mbuf *m, struct label *mlabel) { struct mac_mls *source, *dest; source = SLOT(ifplabel); dest = SLOT(mlabel); mls_copy_effective(source, dest); } static void mls_create_mbuf_multicast_encap(struct mbuf *m, struct label *mlabel, struct ifnet *ifp, struct label *ifplabel, struct mbuf *mnew, struct label *mnewlabel) { struct mac_mls *source, *dest; source = SLOT(mlabel); dest = SLOT(mnewlabel); mls_copy_effective(source, dest); } static void mls_create_mbuf_netlayer(struct mbuf *m, struct label *mlabel, struct mbuf *mnew, struct label *mnewlabel) { struct mac_mls *source, *dest; source = SLOT(mlabel); dest = SLOT(mnewlabel); mls_copy_effective(source, dest); } static int mls_fragment_match(struct mbuf *m, struct label *mlabel, struct ipq *q, struct label *qlabel) { struct mac_mls *a, *b; a = SLOT(qlabel); b = SLOT(mlabel); return (mls_equal_effective(a, b)); } static void mls_relabel_ifnet(struct ucred *cred, struct ifnet *ifp, struct label *ifplabel, struct label *newlabel) { struct mac_mls *source, *dest; source = SLOT(newlabel); dest = SLOT(ifplabel); mls_copy(source, dest); } static void mls_update_ipq(struct mbuf *m, struct label *mlabel, struct ipq *q, struct label *qlabel) { /* NOOP: we only accept matching labels, so no need to update */ } static void mls_inpcb_sosetlabel(struct socket *so, struct label *solabel, struct inpcb *inp, struct label *inplabel) { struct mac_mls *source, *dest; source = SLOT(solabel); dest = SLOT(inplabel); mls_copy(source, dest); } static void mls_create_mbuf_from_firewall(struct mbuf *m, struct label *mlabel) { struct mac_mls *dest; dest = SLOT(mlabel); /* XXX: where is the label for the firewall really comming from? */ mls_set_effective(dest, MAC_MLS_TYPE_EQUAL, 0, NULL); } static void mls_init_syncache_from_inpcb(struct label *label, struct inpcb *inp) { struct mac_mls *source, *dest; source = SLOT(inp->inp_label); dest = SLOT(label); mls_copy_effective(source, dest); } static void mls_create_mbuf_from_syncache(struct label *sc_label, struct mbuf *m, struct label *mlabel) { struct mac_mls *source, *dest; source = SLOT(sc_label); dest = SLOT(mlabel); mls_copy_effective(source, dest); } /* * Labeling event operations: processes. */ static void mls_create_proc0(struct ucred *cred) { struct mac_mls *dest; dest = SLOT(cred->cr_label); mls_set_effective(dest, MAC_MLS_TYPE_EQUAL, 0, NULL); mls_set_range(dest, MAC_MLS_TYPE_LOW, 0, NULL, MAC_MLS_TYPE_HIGH, 0, NULL); } static void mls_create_proc1(struct ucred *cred) { struct mac_mls *dest; dest = SLOT(cred->cr_label); mls_set_effective(dest, MAC_MLS_TYPE_LOW, 0, NULL); mls_set_range(dest, MAC_MLS_TYPE_LOW, 0, NULL, MAC_MLS_TYPE_HIGH, 0, NULL); } static void mls_relabel_cred(struct ucred *cred, struct label *newlabel) { struct mac_mls *source, *dest; source = SLOT(newlabel); dest = SLOT(cred->cr_label); mls_copy(source, dest); } /* * Label cleanup/flush operations. */ static void mls_cleanup_sysv_msgmsg(struct label *msglabel) { bzero(SLOT(msglabel), sizeof(struct mac_mls)); } static void mls_cleanup_sysv_msgqueue(struct label *msqlabel) { bzero(SLOT(msqlabel), sizeof(struct mac_mls)); } static void mls_cleanup_sysv_sem(struct label *semalabel) { bzero(SLOT(semalabel), sizeof(struct mac_mls)); } static void mls_cleanup_sysv_shm(struct label *shmlabel) { bzero(SLOT(shmlabel), sizeof(struct mac_mls)); } /* * Access control checks. */ static int mls_check_bpfdesc_receive(struct bpf_d *d, struct label *dlabel, struct ifnet *ifp, struct label *ifplabel) { struct mac_mls *a, *b; if (!mls_enabled) return (0); a = SLOT(dlabel); b = SLOT(ifplabel); if (mls_equal_effective(a, b)) return (0); return (EACCES); } static int mls_check_cred_relabel(struct ucred *cred, struct label *newlabel) { struct mac_mls *subj, *new; int error; subj = SLOT(cred->cr_label); new = SLOT(newlabel); /* * If there is an MLS label update for the credential, it may be an * update of effective, range, or both. */ error = mls_atmostflags(new, MAC_MLS_FLAGS_BOTH); if (error) return (error); /* * If the MLS label is to be changed, authorize as appropriate. */ if (new->mm_flags & MAC_MLS_FLAGS_BOTH) { /* * If the change request modifies both the MLS label * effective and range, check that the new effective will be * in the new range. */ if ((new->mm_flags & MAC_MLS_FLAGS_BOTH) == MAC_MLS_FLAGS_BOTH && !mls_effective_in_range(new, new)) return (EINVAL); /* * To change the MLS effective label on a credential, the new * effective label must be in the current range. */ if (new->mm_flags & MAC_MLS_FLAG_EFFECTIVE && !mls_effective_in_range(new, subj)) return (EPERM); /* * To change the MLS range label on a credential, the new * range must be in the current range. */ if (new->mm_flags & MAC_MLS_FLAG_RANGE && !mls_range_in_range(new, subj)) return (EPERM); /* * To have EQUAL in any component of the new credential MLS * label, the subject must already have EQUAL in their label. */ if (mls_contains_equal(new)) { error = mls_subject_privileged(subj); if (error) return (error); } } return (0); } static int mls_check_cred_visible(struct ucred *cr1, struct ucred *cr2) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cr1->cr_label); obj = SLOT(cr2->cr_label); /* XXX: range */ if (!mls_dominate_effective(subj, obj)) return (ESRCH); return (0); } static int mls_check_ifnet_relabel(struct ucred *cred, struct ifnet *ifp, struct label *ifplabel, struct label *newlabel) { struct mac_mls *subj, *new; int error; subj = SLOT(cred->cr_label); new = SLOT(newlabel); /* * If there is an MLS label update for the interface, it may be an * update of effective, range, or both. */ error = mls_atmostflags(new, MAC_MLS_FLAGS_BOTH); if (error) return (error); /* * Relabeling network interfaces requires MLS privilege. */ return (mls_subject_privileged(subj)); } static int mls_check_ifnet_transmit(struct ifnet *ifp, struct label *ifplabel, struct mbuf *m, struct label *mlabel) { struct mac_mls *p, *i; if (!mls_enabled) return (0); p = SLOT(mlabel); i = SLOT(ifplabel); return (mls_effective_in_range(p, i) ? 0 : EACCES); } static int mls_check_inpcb_deliver(struct inpcb *inp, struct label *inplabel, struct mbuf *m, struct label *mlabel) { struct mac_mls *p, *i; if (!mls_enabled) return (0); p = SLOT(mlabel); i = SLOT(inplabel); return (mls_equal_effective(p, i) ? 0 : EACCES); } static int mls_check_inpcb_visible(struct ucred *cred, struct inpcb *inp, struct label *inplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(inplabel); if (!mls_dominate_effective(subj, obj)) return (ENOENT); return (0); } static int mls_check_sysv_msgrcv(struct ucred *cred, struct msg *msgptr, struct label *msglabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(msglabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_sysv_msgrmid(struct ucred *cred, struct msg *msgptr, struct label *msglabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(msglabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_sysv_msqget(struct ucred *cred, struct msqid_kernel *msqkptr, struct label *msqklabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(msqklabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_sysv_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr, struct label *msqklabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(msqklabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_sysv_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr, struct label *msqklabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(msqklabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_sysv_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr, struct label *msqklabel, int cmd) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(msqklabel); switch(cmd) { case IPC_RMID: case IPC_SET: if (!mls_dominate_effective(obj, subj)) return (EACCES); break; case IPC_STAT: if (!mls_dominate_effective(subj, obj)) return (EACCES); break; default: return (EACCES); } return (0); } static int mls_check_sysv_semctl(struct ucred *cred, struct semid_kernel *semakptr, struct label *semaklabel, int cmd) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(semaklabel); switch(cmd) { case IPC_RMID: case IPC_SET: case SETVAL: case SETALL: if (!mls_dominate_effective(obj, subj)) return (EACCES); break; case IPC_STAT: case GETVAL: case GETPID: case GETNCNT: case GETZCNT: case GETALL: if (!mls_dominate_effective(subj, obj)) return (EACCES); break; default: return (EACCES); } return (0); } static int mls_check_sysv_semget(struct ucred *cred, struct semid_kernel *semakptr, struct label *semaklabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(semaklabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_sysv_semop(struct ucred *cred, struct semid_kernel *semakptr, struct label *semaklabel, size_t accesstype) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(semaklabel); if (accesstype & SEM_R) if (!mls_dominate_effective(subj, obj)) return (EACCES); if (accesstype & SEM_A) if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_sysv_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr, struct label *shmseglabel, int shmflg) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(shmseglabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); if ((shmflg & SHM_RDONLY) == 0) if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_sysv_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr, struct label *shmseglabel, int cmd) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(shmseglabel); switch(cmd) { case IPC_RMID: case IPC_SET: if (!mls_dominate_effective(obj, subj)) return (EACCES); break; case IPC_STAT: case SHM_STAT: if (!mls_dominate_effective(subj, obj)) return (EACCES); break; default: return (EACCES); } return (0); } static int mls_check_sysv_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr, struct label *shmseglabel, int shmflg) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(shmseglabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_mount_stat(struct ucred *cred, struct mount *mp, struct label *mntlabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(mntlabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_pipe_ioctl(struct ucred *cred, struct pipepair *pp, struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data) { if(!mls_enabled) return (0); /* XXX: This will be implemented soon... */ return (0); } static int mls_check_pipe_poll(struct ucred *cred, struct pipepair *pp, struct label *pplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(pplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_pipe_read(struct ucred *cred, struct pipepair *pp, struct label *pplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(pplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_pipe_relabel(struct ucred *cred, struct pipepair *pp, struct label *pplabel, struct label *newlabel) { struct mac_mls *subj, *obj, *new; int error; new = SLOT(newlabel); subj = SLOT(cred->cr_label); obj = SLOT(pplabel); /* * If there is an MLS label update for a pipe, it must be a effective * update. */ error = mls_atmostflags(new, MAC_MLS_FLAG_EFFECTIVE); if (error) return (error); /* * To perform a relabel of a pipe (MLS label or not), MLS must * authorize the relabel. */ if (!mls_effective_in_range(obj, subj)) return (EPERM); /* * If the MLS label is to be changed, authorize as appropriate. */ if (new->mm_flags & MAC_MLS_FLAG_EFFECTIVE) { /* * To change the MLS label on a pipe, the new pipe label must * be in the subject range. */ if (!mls_effective_in_range(new, subj)) return (EPERM); /* * To change the MLS label on a pipe to be EQUAL, the subject * must have appropriate privilege. */ if (mls_contains_equal(new)) { error = mls_subject_privileged(subj); if (error) return (error); } } return (0); } static int mls_check_pipe_stat(struct ucred *cred, struct pipepair *pp, struct label *pplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(pplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_pipe_write(struct ucred *cred, struct pipepair *pp, struct label *pplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(pplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_posix_sem_write(struct ucred *cred, struct ksem *ks, struct label *kslabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(kslabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_posix_sem_rdonly(struct ucred *cred, struct ksem *ks, struct label *kslabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(kslabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_proc_debug(struct ucred *cred, struct proc *p) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(p->p_ucred->cr_label); /* XXX: range checks */ if (!mls_dominate_effective(subj, obj)) return (ESRCH); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_proc_sched(struct ucred *cred, struct proc *p) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(p->p_ucred->cr_label); /* XXX: range checks */ if (!mls_dominate_effective(subj, obj)) return (ESRCH); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_proc_signal(struct ucred *cred, struct proc *p, int signum) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(p->p_ucred->cr_label); /* XXX: range checks */ if (!mls_dominate_effective(subj, obj)) return (ESRCH); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_socket_deliver(struct socket *so, struct label *solabel, struct mbuf *m, struct label *mlabel) { struct mac_mls *p, *s; if (!mls_enabled) return (0); p = SLOT(mlabel); s = SLOT(solabel); return (mls_equal_effective(p, s) ? 0 : EACCES); } static int mls_check_socket_relabel(struct ucred *cred, struct socket *so, struct label *solabel, struct label *newlabel) { struct mac_mls *subj, *obj, *new; int error; new = SLOT(newlabel); subj = SLOT(cred->cr_label); obj = SLOT(solabel); /* * If there is an MLS label update for the socket, it may be an * update of effective. */ error = mls_atmostflags(new, MAC_MLS_FLAG_EFFECTIVE); if (error) return (error); /* * To relabel a socket, the old socket effective must be in the * subject range. */ if (!mls_effective_in_range(obj, subj)) return (EPERM); /* * If the MLS label is to be changed, authorize as appropriate. */ if (new->mm_flags & MAC_MLS_FLAG_EFFECTIVE) { /* * To relabel a socket, the new socket effective must be in * the subject range. */ if (!mls_effective_in_range(new, subj)) return (EPERM); /* * To change the MLS label on the socket to contain EQUAL, * the subject must have appropriate privilege. */ if (mls_contains_equal(new)) { error = mls_subject_privileged(subj); if (error) return (error); } } return (0); } static int mls_check_socket_visible(struct ucred *cred, struct socket *so, struct label *solabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(solabel); if (!mls_dominate_effective(subj, obj)) return (ENOENT); return (0); } static int mls_check_system_acct(struct ucred *cred, struct vnode *vp, struct label *vplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj) || !mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_system_auditctl(struct ucred *cred, struct vnode *vp, struct label *vplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj) || !mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_system_swapon(struct ucred *cred, struct vnode *vp, struct label *vplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj) || !mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_chdir(struct ucred *cred, struct vnode *dvp, struct label *dvplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(dvplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_chroot(struct ucred *cred, struct vnode *dvp, struct label *dvplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(dvplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_create(struct ucred *cred, struct vnode *dvp, struct label *dvplabel, struct componentname *cnp, struct vattr *vap) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(dvplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, struct label *vplabel, acl_type_t type) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_vnode_deleteextattr(struct ucred *cred, struct vnode *vp, struct label *vplabel, int attrnamespace, const char *name) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_vnode_exec(struct ucred *cred, struct vnode *vp, struct label *vplabel, struct image_params *imgp, struct label *execlabel) { struct mac_mls *subj, *obj, *exec; int error; if (execlabel != NULL) { /* * We currently don't permit labels to be changed at * exec-time as part of MLS, so disallow non-NULL MLS label * elements in the execlabel. */ exec = SLOT(execlabel); error = mls_atmostflags(exec, 0); if (error) return (error); } if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_getacl(struct ucred *cred, struct vnode *vp, struct label *vplabel, acl_type_t type) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, struct label *vplabel, int attrnamespace, const char *name, struct uio *uio) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_link(struct ucred *cred, struct vnode *dvp, struct label *dvplabel, struct vnode *vp, struct label *vplabel, struct componentname *cnp) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(dvplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_vnode_listextattr(struct ucred *cred, struct vnode *vp, struct label *vplabel, int attrnamespace) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, struct label *dvplabel, struct componentname *cnp) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(dvplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_mmap(struct ucred *cred, struct vnode *vp, struct label *vplabel, int prot, int flags) { struct mac_mls *subj, *obj; /* * Rely on the use of open()-time protections to handle * non-revocation cases. */ if (!mls_enabled || !revocation_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) { if (!mls_dominate_effective(subj, obj)) return (EACCES); } if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) { if (!mls_dominate_effective(obj, subj)) return (EACCES); } return (0); } static int mls_check_vnode_open(struct ucred *cred, struct vnode *vp, struct label *vplabel, int acc_mode) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); /* XXX privilege override for admin? */ if (acc_mode & (VREAD | VEXEC | VSTAT)) { if (!mls_dominate_effective(subj, obj)) return (EACCES); } if (acc_mode & (VWRITE | VAPPEND | VADMIN)) { if (!mls_dominate_effective(obj, subj)) return (EACCES); } return (0); } static int mls_check_vnode_poll(struct ucred *active_cred, struct ucred *file_cred, struct vnode *vp, struct label *vplabel) { struct mac_mls *subj, *obj; if (!mls_enabled || !revocation_enabled) return (0); subj = SLOT(active_cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_read(struct ucred *active_cred, struct ucred *file_cred, struct vnode *vp, struct label *vplabel) { struct mac_mls *subj, *obj; if (!mls_enabled || !revocation_enabled) return (0); subj = SLOT(active_cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_readdir(struct ucred *cred, struct vnode *dvp, struct label *dvplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(dvplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_readlink(struct ucred *cred, struct vnode *vp, struct label *vplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_relabel(struct ucred *cred, struct vnode *vp, struct label *vplabel, struct label *newlabel) { struct mac_mls *old, *new, *subj; int error; old = SLOT(vplabel); new = SLOT(newlabel); subj = SLOT(cred->cr_label); /* * If there is an MLS label update for the vnode, it must be a * effective label. */ error = mls_atmostflags(new, MAC_MLS_FLAG_EFFECTIVE); if (error) return (error); /* * To perform a relabel of the vnode (MLS label or not), MLS must * authorize the relabel. */ if (!mls_effective_in_range(old, subj)) return (EPERM); /* * If the MLS label is to be changed, authorize as appropriate. */ if (new->mm_flags & MAC_MLS_FLAG_EFFECTIVE) { /* * To change the MLS label on a vnode, the new vnode label * must be in the subject range. */ if (!mls_effective_in_range(new, subj)) return (EPERM); /* * To change the MLS label on the vnode to be EQUAL, the * subject must have appropriate privilege. */ if (mls_contains_equal(new)) { error = mls_subject_privileged(subj); if (error) return (error); } } return (0); } static int mls_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, struct label *dvplabel, struct vnode *vp, struct label *vplabel, struct componentname *cnp) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(dvplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, struct label *dvplabel, struct vnode *vp, struct label *vplabel, int samedir, struct componentname *cnp) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(dvplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); if (vp != NULL) { obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); } return (0); } static int mls_check_vnode_revoke(struct ucred *cred, struct vnode *vp, struct label *vplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_vnode_setacl(struct ucred *cred, struct vnode *vp, struct label *vplabel, acl_type_t type, struct acl *acl) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, struct label *vplabel, int attrnamespace, const char *name, struct uio *uio) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); /* XXX: protect the MAC EA in a special way? */ return (0); } static int mls_check_vnode_setflags(struct ucred *cred, struct vnode *vp, struct label *vplabel, u_long flags) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_vnode_setmode(struct ucred *cred, struct vnode *vp, struct label *vplabel, mode_t mode) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_vnode_setowner(struct ucred *cred, struct vnode *vp, struct label *vplabel, uid_t uid, gid_t gid) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, struct label *vplabel, struct timespec atime, struct timespec mtime) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_vnode_stat(struct ucred *active_cred, struct ucred *file_cred, struct vnode *vp, struct label *vplabel) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(active_cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(subj, obj)) return (EACCES); return (0); } static int mls_check_vnode_unlink(struct ucred *cred, struct vnode *dvp, struct label *dvplabel, struct vnode *vp, struct label *vplabel, struct componentname *cnp) { struct mac_mls *subj, *obj; if (!mls_enabled) return (0); subj = SLOT(cred->cr_label); obj = SLOT(dvplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static int mls_check_vnode_write(struct ucred *active_cred, struct ucred *file_cred, struct vnode *vp, struct label *vplabel) { struct mac_mls *subj, *obj; if (!mls_enabled || !revocation_enabled) return (0); subj = SLOT(active_cred->cr_label); obj = SLOT(vplabel); if (!mls_dominate_effective(obj, subj)) return (EACCES); return (0); } static void mls_associate_nfsd_label(struct ucred *cred) { struct mac_mls *label; label = SLOT(cred->cr_label); mls_set_effective(label, MAC_MLS_TYPE_LOW, 0, NULL); mls_set_range(label, MAC_MLS_TYPE_LOW, 0, NULL, MAC_MLS_TYPE_HIGH, 0, NULL); } static struct mac_policy_ops mls_ops = { .mpo_init = mls_init, .mpo_init_bpfdesc_label = mls_init_label, .mpo_init_cred_label = mls_init_label, .mpo_init_devfs_label = mls_init_label, .mpo_init_ifnet_label = mls_init_label, .mpo_init_inpcb_label = mls_init_label_waitcheck, .mpo_init_syncache_label = mls_init_label_waitcheck, .mpo_init_sysv_msgmsg_label = mls_init_label, .mpo_init_sysv_msgqueue_label = mls_init_label, .mpo_init_sysv_sem_label = mls_init_label, .mpo_init_sysv_shm_label = mls_init_label, .mpo_init_ipq_label = mls_init_label_waitcheck, .mpo_init_mbuf_label = mls_init_label_waitcheck, .mpo_init_mount_label = mls_init_label, .mpo_init_pipe_label = mls_init_label, .mpo_init_posix_sem_label = mls_init_label, .mpo_init_socket_label = mls_init_label_waitcheck, .mpo_init_socket_peer_label = mls_init_label_waitcheck, .mpo_init_vnode_label = mls_init_label, .mpo_destroy_bpfdesc_label = mls_destroy_label, .mpo_destroy_cred_label = mls_destroy_label, .mpo_destroy_devfs_label = mls_destroy_label, .mpo_destroy_ifnet_label = mls_destroy_label, .mpo_destroy_inpcb_label = mls_destroy_label, .mpo_destroy_syncache_label = mls_destroy_label, .mpo_destroy_sysv_msgmsg_label = mls_destroy_label, .mpo_destroy_sysv_msgqueue_label = mls_destroy_label, .mpo_destroy_sysv_sem_label = mls_destroy_label, .mpo_destroy_sysv_shm_label = mls_destroy_label, .mpo_destroy_ipq_label = mls_destroy_label, .mpo_destroy_mbuf_label = mls_destroy_label, .mpo_destroy_mount_label = mls_destroy_label, .mpo_destroy_pipe_label = mls_destroy_label, .mpo_destroy_posix_sem_label = mls_destroy_label, .mpo_destroy_socket_label = mls_destroy_label, .mpo_destroy_socket_peer_label = mls_destroy_label, .mpo_destroy_vnode_label = mls_destroy_label, .mpo_copy_cred_label = mls_copy_label, .mpo_copy_ifnet_label = mls_copy_label, .mpo_copy_mbuf_label = mls_copy_label, .mpo_copy_pipe_label = mls_copy_label, .mpo_copy_socket_label = mls_copy_label, .mpo_copy_vnode_label = mls_copy_label, .mpo_externalize_cred_label = mls_externalize_label, .mpo_externalize_ifnet_label = mls_externalize_label, .mpo_externalize_pipe_label = mls_externalize_label, .mpo_externalize_socket_label = mls_externalize_label, .mpo_externalize_socket_peer_label = mls_externalize_label, .mpo_externalize_vnode_label = mls_externalize_label, .mpo_internalize_cred_label = mls_internalize_label, .mpo_internalize_ifnet_label = mls_internalize_label, .mpo_internalize_pipe_label = mls_internalize_label, .mpo_internalize_socket_label = mls_internalize_label, .mpo_internalize_vnode_label = mls_internalize_label, .mpo_create_devfs_device = mls_create_devfs_device, .mpo_create_devfs_directory = mls_create_devfs_directory, .mpo_create_devfs_symlink = mls_create_devfs_symlink, .mpo_create_mount = mls_create_mount, .mpo_relabel_vnode = mls_relabel_vnode, .mpo_update_devfs = mls_update_devfs, .mpo_associate_vnode_devfs = mls_associate_vnode_devfs, .mpo_associate_vnode_extattr = mls_associate_vnode_extattr, .mpo_associate_vnode_singlelabel = mls_associate_vnode_singlelabel, .mpo_create_vnode_extattr = mls_create_vnode_extattr, .mpo_setlabel_vnode_extattr = mls_setlabel_vnode_extattr, .mpo_create_mbuf_from_socket = mls_create_mbuf_from_socket, .mpo_create_mbuf_from_syncache = mls_create_mbuf_from_syncache, .mpo_create_pipe = mls_create_pipe, .mpo_create_posix_sem = mls_create_posix_sem, .mpo_create_socket = mls_create_socket, .mpo_create_socket_from_socket = mls_create_socket_from_socket, .mpo_relabel_pipe = mls_relabel_pipe, .mpo_relabel_socket = mls_relabel_socket, .mpo_set_socket_peer_from_mbuf = mls_set_socket_peer_from_mbuf, .mpo_set_socket_peer_from_socket = mls_set_socket_peer_from_socket, .mpo_create_bpfdesc = mls_create_bpfdesc, .mpo_create_datagram_from_ipq = mls_create_datagram_from_ipq, .mpo_create_fragment = mls_create_fragment, .mpo_create_ifnet = mls_create_ifnet, .mpo_create_inpcb_from_socket = mls_create_inpcb_from_socket, .mpo_init_syncache_from_inpcb = mls_init_syncache_from_inpcb, .mpo_create_ipq = mls_create_ipq, .mpo_create_sysv_msgmsg = mls_create_sysv_msgmsg, .mpo_create_sysv_msgqueue = mls_create_sysv_msgqueue, .mpo_create_sysv_sem = mls_create_sysv_sem, .mpo_create_sysv_shm = mls_create_sysv_shm, .mpo_create_mbuf_from_inpcb = mls_create_mbuf_from_inpcb, .mpo_create_mbuf_linklayer = mls_create_mbuf_linklayer, .mpo_create_mbuf_from_bpfdesc = mls_create_mbuf_from_bpfdesc, .mpo_create_mbuf_from_ifnet = mls_create_mbuf_from_ifnet, .mpo_create_mbuf_multicast_encap = mls_create_mbuf_multicast_encap, .mpo_create_mbuf_netlayer = mls_create_mbuf_netlayer, .mpo_fragment_match = mls_fragment_match, .mpo_relabel_ifnet = mls_relabel_ifnet, .mpo_update_ipq = mls_update_ipq, .mpo_inpcb_sosetlabel = mls_inpcb_sosetlabel, .mpo_create_proc0 = mls_create_proc0, .mpo_create_proc1 = mls_create_proc1, .mpo_relabel_cred = mls_relabel_cred, .mpo_cleanup_sysv_msgmsg = mls_cleanup_sysv_msgmsg, .mpo_cleanup_sysv_msgqueue = mls_cleanup_sysv_msgqueue, .mpo_cleanup_sysv_sem = mls_cleanup_sysv_sem, .mpo_cleanup_sysv_shm = mls_cleanup_sysv_shm, .mpo_check_bpfdesc_receive = mls_check_bpfdesc_receive, .mpo_check_cred_relabel = mls_check_cred_relabel, .mpo_check_cred_visible = mls_check_cred_visible, .mpo_check_ifnet_relabel = mls_check_ifnet_relabel, .mpo_check_ifnet_transmit = mls_check_ifnet_transmit, .mpo_check_inpcb_deliver = mls_check_inpcb_deliver, .mpo_check_inpcb_visible = mls_check_inpcb_visible, .mpo_check_sysv_msgrcv = mls_check_sysv_msgrcv, .mpo_check_sysv_msgrmid = mls_check_sysv_msgrmid, .mpo_check_sysv_msqget = mls_check_sysv_msqget, .mpo_check_sysv_msqsnd = mls_check_sysv_msqsnd, .mpo_check_sysv_msqrcv = mls_check_sysv_msqrcv, .mpo_check_sysv_msqctl = mls_check_sysv_msqctl, .mpo_check_sysv_semctl = mls_check_sysv_semctl, .mpo_check_sysv_semget = mls_check_sysv_semget, .mpo_check_sysv_semop = mls_check_sysv_semop, .mpo_check_sysv_shmat = mls_check_sysv_shmat, .mpo_check_sysv_shmctl = mls_check_sysv_shmctl, .mpo_check_sysv_shmget = mls_check_sysv_shmget, .mpo_check_mount_stat = mls_check_mount_stat, .mpo_check_pipe_ioctl = mls_check_pipe_ioctl, .mpo_check_pipe_poll = mls_check_pipe_poll, .mpo_check_pipe_read = mls_check_pipe_read, .mpo_check_pipe_relabel = mls_check_pipe_relabel, .mpo_check_pipe_stat = mls_check_pipe_stat, .mpo_check_pipe_write = mls_check_pipe_write, .mpo_check_posix_sem_destroy = mls_check_posix_sem_write, .mpo_check_posix_sem_getvalue = mls_check_posix_sem_rdonly, .mpo_check_posix_sem_open = mls_check_posix_sem_write, .mpo_check_posix_sem_post = mls_check_posix_sem_write, .mpo_check_posix_sem_unlink = mls_check_posix_sem_write, .mpo_check_posix_sem_wait = mls_check_posix_sem_write, .mpo_check_proc_debug = mls_check_proc_debug, .mpo_check_proc_sched = mls_check_proc_sched, .mpo_check_proc_signal = mls_check_proc_signal, .mpo_check_socket_deliver = mls_check_socket_deliver, .mpo_check_socket_relabel = mls_check_socket_relabel, .mpo_check_socket_visible = mls_check_socket_visible, .mpo_check_system_acct = mls_check_system_acct, .mpo_check_system_auditctl = mls_check_system_auditctl, .mpo_check_system_swapon = mls_check_system_swapon, .mpo_check_vnode_access = mls_check_vnode_open, .mpo_check_vnode_chdir = mls_check_vnode_chdir, .mpo_check_vnode_chroot = mls_check_vnode_chroot, .mpo_check_vnode_create = mls_check_vnode_create, .mpo_check_vnode_deleteacl = mls_check_vnode_deleteacl, .mpo_check_vnode_deleteextattr = mls_check_vnode_deleteextattr, .mpo_check_vnode_exec = mls_check_vnode_exec, .mpo_check_vnode_getacl = mls_check_vnode_getacl, .mpo_check_vnode_getextattr = mls_check_vnode_getextattr, .mpo_check_vnode_link = mls_check_vnode_link, .mpo_check_vnode_listextattr = mls_check_vnode_listextattr, .mpo_check_vnode_lookup = mls_check_vnode_lookup, .mpo_check_vnode_mmap = mls_check_vnode_mmap, .mpo_check_vnode_open = mls_check_vnode_open, .mpo_check_vnode_poll = mls_check_vnode_poll, .mpo_check_vnode_read = mls_check_vnode_read, .mpo_check_vnode_readdir = mls_check_vnode_readdir, .mpo_check_vnode_readlink = mls_check_vnode_readlink, .mpo_check_vnode_relabel = mls_check_vnode_relabel, .mpo_check_vnode_rename_from = mls_check_vnode_rename_from, .mpo_check_vnode_rename_to = mls_check_vnode_rename_to, .mpo_check_vnode_revoke = mls_check_vnode_revoke, .mpo_check_vnode_setacl = mls_check_vnode_setacl, .mpo_check_vnode_setextattr = mls_check_vnode_setextattr, .mpo_check_vnode_setflags = mls_check_vnode_setflags, .mpo_check_vnode_setmode = mls_check_vnode_setmode, .mpo_check_vnode_setowner = mls_check_vnode_setowner, .mpo_check_vnode_setutimes = mls_check_vnode_setutimes, .mpo_check_vnode_stat = mls_check_vnode_stat, .mpo_check_vnode_unlink = mls_check_vnode_unlink, .mpo_check_vnode_write = mls_check_vnode_write, .mpo_associate_nfsd_label = mls_associate_nfsd_label, .mpo_create_mbuf_from_firewall = mls_create_mbuf_from_firewall, }; MAC_POLICY_SET(&mls_ops, mac_mls, "TrustedBSD MAC/MLS", MPC_LOADTIME_FLAG_NOTLATE | MPC_LOADTIME_FLAG_LABELMBUFS, &mls_slot);