7935d5382b
credential: mac_associate_nfsd_label() This entry point can be utilized by various Mandatory Access Control policies so they can properly initialize the label of files which get created as a result of an NFS operation. This work will be useful for fixing kernel panics associated with accessing un-initialized or invalid vnode labels. The implementation of these entry points will come shortly. Obtained from: TrustedBSD Requested by: mdodd MFC after: 3 weeks
1038 lines
22 KiB
C
1038 lines
22 KiB
C
/*-
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* Copyright (c) 1999-2002 Robert N. M. Watson
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* Copyright (c) 2001 Ilmar S. Habibulin
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* Copyright (c) 2001-2005 McAfee, Inc.
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* Copyright (c) 2005 SPARTA, Inc.
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* All rights reserved.
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*
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* This software was developed by Robert Watson and Ilmar Habibulin for the
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* TrustedBSD Project.
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*
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* This software was developed for the FreeBSD Project in part by McAfee
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* Research, the Security Research Division of McAfee, Inc. under
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* DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
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* CHATS research program.
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*
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* This software was enhanced by SPARTA ISSO under SPAWAR contract
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* N66001-04-C-6019 ("SEFOS").
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_mac.h"
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#include "opt_devfs.h"
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#include <sys/param.h>
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#include <sys/condvar.h>
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#include <sys/extattr.h>
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#include <sys/imgact.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/mac.h>
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#include <sys/proc.h>
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#include <sys/sbuf.h>
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#include <sys/systm.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/file.h>
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#include <sys/namei.h>
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#include <sys/sysctl.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <vm/vm_object.h>
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#include <sys/mac_policy.h>
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#include <fs/devfs/devfs.h>
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#include <security/mac/mac_internal.h>
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/*
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* Warn about EA transactions only the first time they happen.
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* Weak coherency, no locking.
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*/
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static int ea_warn_once = 0;
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static int mac_enforce_fs = 1;
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SYSCTL_INT(_security_mac, OID_AUTO, enforce_fs, CTLFLAG_RW,
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&mac_enforce_fs, 0, "Enforce MAC policy on file system objects");
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TUNABLE_INT("security.mac.enforce_fs", &mac_enforce_fs);
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#ifdef MAC_DEBUG
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static int mac_debug_label_fallback = 0;
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SYSCTL_INT(_security_mac_debug, OID_AUTO, label_fallback, CTLFLAG_RW,
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&mac_debug_label_fallback, 0, "Filesystems should fall back to fs label"
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"when label is corrupted.");
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TUNABLE_INT("security.mac.debug_label_fallback",
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&mac_debug_label_fallback);
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static unsigned int nmacmounts, nmacvnodes, nmacdevfsdirents;
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SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, mounts, CTLFLAG_RD,
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&nmacmounts, 0, "number of mounts in use");
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SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, vnodes, CTLFLAG_RD,
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&nmacvnodes, 0, "number of vnodes in use");
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SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, devfsdirents, CTLFLAG_RD,
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&nmacdevfsdirents, 0, "number of devfs dirents inuse");
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#endif
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static int mac_setlabel_vnode_extattr(struct ucred *cred,
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struct vnode *vp, struct label *intlabel);
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static struct label *
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mac_devfsdirent_label_alloc(void)
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{
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struct label *label;
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label = mac_labelzone_alloc(M_WAITOK);
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MAC_PERFORM(init_devfsdirent_label, label);
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MAC_DEBUG_COUNTER_INC(&nmacdevfsdirents);
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return (label);
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}
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void
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mac_init_devfsdirent(struct devfs_dirent *de)
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{
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de->de_label = mac_devfsdirent_label_alloc();
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}
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static struct label *
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mac_mount_label_alloc(void)
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{
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struct label *label;
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label = mac_labelzone_alloc(M_WAITOK);
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MAC_PERFORM(init_mount_label, label);
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MAC_DEBUG_COUNTER_INC(&nmacmounts);
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return (label);
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}
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static struct label *
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mac_mount_fs_label_alloc(void)
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{
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struct label *label;
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label = mac_labelzone_alloc(M_WAITOK);
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MAC_PERFORM(init_mount_fs_label, label);
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MAC_DEBUG_COUNTER_INC(&nmacmounts);
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return (label);
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}
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void
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mac_init_mount(struct mount *mp)
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{
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mp->mnt_mntlabel = mac_mount_label_alloc();
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mp->mnt_fslabel = mac_mount_fs_label_alloc();
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}
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struct label *
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mac_vnode_label_alloc(void)
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{
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struct label *label;
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label = mac_labelzone_alloc(M_WAITOK);
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MAC_PERFORM(init_vnode_label, label);
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MAC_DEBUG_COUNTER_INC(&nmacvnodes);
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return (label);
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}
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void
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mac_init_vnode(struct vnode *vp)
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{
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vp->v_label = mac_vnode_label_alloc();
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}
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static void
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mac_devfsdirent_label_free(struct label *label)
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{
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MAC_PERFORM(destroy_devfsdirent_label, label);
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mac_labelzone_free(label);
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MAC_DEBUG_COUNTER_DEC(&nmacdevfsdirents);
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}
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void
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mac_destroy_devfsdirent(struct devfs_dirent *de)
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{
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mac_devfsdirent_label_free(de->de_label);
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de->de_label = NULL;
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}
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static void
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mac_mount_label_free(struct label *label)
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{
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MAC_PERFORM(destroy_mount_label, label);
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mac_labelzone_free(label);
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MAC_DEBUG_COUNTER_DEC(&nmacmounts);
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}
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static void
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mac_mount_fs_label_free(struct label *label)
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{
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MAC_PERFORM(destroy_mount_fs_label, label);
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mac_labelzone_free(label);
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MAC_DEBUG_COUNTER_DEC(&nmacmounts);
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}
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void
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mac_destroy_mount(struct mount *mp)
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{
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mac_mount_fs_label_free(mp->mnt_fslabel);
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mp->mnt_fslabel = NULL;
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mac_mount_label_free(mp->mnt_mntlabel);
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mp->mnt_mntlabel = NULL;
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}
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void
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mac_vnode_label_free(struct label *label)
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{
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MAC_PERFORM(destroy_vnode_label, label);
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mac_labelzone_free(label);
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MAC_DEBUG_COUNTER_DEC(&nmacvnodes);
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}
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void
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mac_destroy_vnode(struct vnode *vp)
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{
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mac_vnode_label_free(vp->v_label);
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vp->v_label = NULL;
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}
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void
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mac_copy_vnode_label(struct label *src, struct label *dest)
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{
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MAC_PERFORM(copy_vnode_label, src, dest);
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}
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int
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mac_externalize_vnode_label(struct label *label, char *elements,
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char *outbuf, size_t outbuflen)
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{
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int error;
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MAC_EXTERNALIZE(vnode, label, elements, outbuf, outbuflen);
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return (error);
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}
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int
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mac_internalize_vnode_label(struct label *label, char *string)
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{
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int error;
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MAC_INTERNALIZE(vnode, label, string);
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return (error);
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}
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void
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mac_update_devfsdirent(struct mount *mp, struct devfs_dirent *de,
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struct vnode *vp)
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{
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MAC_PERFORM(update_devfsdirent, mp, de, de->de_label, vp,
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vp->v_label);
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}
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void
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mac_associate_vnode_devfs(struct mount *mp, struct devfs_dirent *de,
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struct vnode *vp)
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{
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MAC_PERFORM(associate_vnode_devfs, mp, mp->mnt_fslabel, de,
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de->de_label, vp, vp->v_label);
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}
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int
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mac_associate_vnode_extattr(struct mount *mp, struct vnode *vp)
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{
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int error;
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ASSERT_VOP_LOCKED(vp, "mac_associate_vnode_extattr");
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MAC_CHECK(associate_vnode_extattr, mp, mp->mnt_fslabel, vp,
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vp->v_label);
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return (error);
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}
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void
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mac_associate_vnode_singlelabel(struct mount *mp, struct vnode *vp)
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{
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MAC_PERFORM(associate_vnode_singlelabel, mp, mp->mnt_fslabel, vp,
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vp->v_label);
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}
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int
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mac_create_vnode_extattr(struct ucred *cred, struct mount *mp,
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struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
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{
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int error;
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ASSERT_VOP_LOCKED(dvp, "mac_create_vnode_extattr");
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ASSERT_VOP_LOCKED(vp, "mac_create_vnode_extattr");
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error = VOP_OPENEXTATTR(vp, cred, curthread);
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if (error == EOPNOTSUPP) {
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/* XXX: Optionally abort if transactions not supported. */
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if (ea_warn_once == 0) {
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printf("Warning: transactions not supported "
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"in EA write.\n");
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ea_warn_once = 1;
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}
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} else if (error)
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return (error);
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MAC_CHECK(create_vnode_extattr, cred, mp, mp->mnt_fslabel,
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dvp, dvp->v_label, vp, vp->v_label, cnp);
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if (error) {
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VOP_CLOSEEXTATTR(vp, 0, NOCRED, curthread);
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return (error);
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}
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error = VOP_CLOSEEXTATTR(vp, 1, NOCRED, curthread);
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if (error == EOPNOTSUPP)
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error = 0; /* XXX */
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return (error);
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}
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static int
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mac_setlabel_vnode_extattr(struct ucred *cred, struct vnode *vp,
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struct label *intlabel)
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{
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int error;
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ASSERT_VOP_LOCKED(vp, "mac_setlabel_vnode_extattr");
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error = VOP_OPENEXTATTR(vp, cred, curthread);
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if (error == EOPNOTSUPP) {
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/* XXX: Optionally abort if transactions not supported. */
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if (ea_warn_once == 0) {
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printf("Warning: transactions not supported "
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"in EA write.\n");
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ea_warn_once = 1;
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}
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} else if (error)
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return (error);
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MAC_CHECK(setlabel_vnode_extattr, cred, vp, vp->v_label, intlabel);
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if (error) {
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VOP_CLOSEEXTATTR(vp, 0, NOCRED, curthread);
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return (error);
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}
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error = VOP_CLOSEEXTATTR(vp, 1, NOCRED, curthread);
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if (error == EOPNOTSUPP)
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error = 0; /* XXX */
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return (error);
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}
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void
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mac_execve_transition(struct ucred *old, struct ucred *new, struct vnode *vp,
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struct label *interpvnodelabel, struct image_params *imgp)
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{
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ASSERT_VOP_LOCKED(vp, "mac_execve_transition");
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if (!mac_enforce_process && !mac_enforce_fs)
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return;
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MAC_PERFORM(execve_transition, old, new, vp, vp->v_label,
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interpvnodelabel, imgp, imgp->execlabel);
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}
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int
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mac_execve_will_transition(struct ucred *old, struct vnode *vp,
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struct label *interpvnodelabel, struct image_params *imgp)
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{
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int result;
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ASSERT_VOP_LOCKED(vp, "mac_execve_will_transition");
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if (!mac_enforce_process && !mac_enforce_fs)
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return (0);
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result = 0;
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MAC_BOOLEAN(execve_will_transition, ||, old, vp, vp->v_label,
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interpvnodelabel, imgp, imgp->execlabel);
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return (result);
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}
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int
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mac_check_vnode_access(struct ucred *cred, struct vnode *vp, int acc_mode)
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{
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int error;
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ASSERT_VOP_LOCKED(vp, "mac_check_vnode_access");
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if (!mac_enforce_fs)
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return (0);
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MAC_CHECK(check_vnode_access, cred, vp, vp->v_label, acc_mode);
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return (error);
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}
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int
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mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp)
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{
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int error;
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ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_chdir");
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if (!mac_enforce_fs)
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return (0);
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MAC_CHECK(check_vnode_chdir, cred, dvp, dvp->v_label);
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return (error);
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}
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int
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mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp)
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{
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int error;
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ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_chroot");
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if (!mac_enforce_fs)
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return (0);
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MAC_CHECK(check_vnode_chroot, cred, dvp, dvp->v_label);
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return (error);
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}
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int
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mac_check_vnode_create(struct ucred *cred, struct vnode *dvp,
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struct componentname *cnp, struct vattr *vap)
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{
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int error;
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ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_create");
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if (!mac_enforce_fs)
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return (0);
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MAC_CHECK(check_vnode_create, cred, dvp, dvp->v_label, cnp, vap);
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return (error);
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}
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int
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mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, struct vnode *vp,
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struct componentname *cnp)
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{
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int error;
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ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_delete");
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ASSERT_VOP_LOCKED(vp, "mac_check_vnode_delete");
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if (!mac_enforce_fs)
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return (0);
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MAC_CHECK(check_vnode_delete, cred, dvp, dvp->v_label, vp,
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vp->v_label, cnp);
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return (error);
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}
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int
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mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp,
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acl_type_t type)
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{
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int error;
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ASSERT_VOP_LOCKED(vp, "mac_check_vnode_deleteacl");
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if (!mac_enforce_fs)
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return (0);
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MAC_CHECK(check_vnode_deleteacl, cred, vp, vp->v_label, type);
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return (error);
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}
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int
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mac_check_vnode_deleteextattr(struct ucred *cred, struct vnode *vp,
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int attrnamespace, const char *name)
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{
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int error;
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ASSERT_VOP_LOCKED(vp, "mac_check_vnode_deleteextattr");
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if (!mac_enforce_fs)
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return (0);
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MAC_CHECK(check_vnode_deleteextattr, cred, vp, vp->v_label,
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attrnamespace, name);
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return (error);
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}
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int
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mac_check_vnode_exec(struct ucred *cred, struct vnode *vp,
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struct image_params *imgp)
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{
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int error;
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ASSERT_VOP_LOCKED(vp, "mac_check_vnode_exec");
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if (!mac_enforce_process && !mac_enforce_fs)
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return (0);
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MAC_CHECK(check_vnode_exec, cred, vp, vp->v_label, imgp,
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imgp->execlabel);
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return (error);
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}
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int
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mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, acl_type_t type)
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{
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int error;
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ASSERT_VOP_LOCKED(vp, "mac_check_vnode_getacl");
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|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_getacl, cred, vp, vp->v_label, type);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp,
|
|
int attrnamespace, const char *name, struct uio *uio)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_getextattr");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_getextattr, cred, vp, vp->v_label,
|
|
attrnamespace, name, uio);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_link(struct ucred *cred, struct vnode *dvp,
|
|
struct vnode *vp, struct componentname *cnp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_link");
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_link");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_link, cred, dvp, dvp->v_label, vp,
|
|
vp->v_label, cnp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_listextattr(struct ucred *cred, struct vnode *vp,
|
|
int attrnamespace)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_listextattr");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_listextattr, cred, vp, vp->v_label,
|
|
attrnamespace);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp,
|
|
struct componentname *cnp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_lookup");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_lookup, cred, dvp, dvp->v_label, cnp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp,
|
|
int prot, int flags)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_mmap");
|
|
|
|
if (!mac_enforce_fs || !mac_enforce_vm)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_mmap, cred, vp, vp->v_label, prot, flags);
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
mac_check_vnode_mmap_downgrade(struct ucred *cred, struct vnode *vp, int *prot)
|
|
{
|
|
int result = *prot;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_mmap_downgrade");
|
|
|
|
if (!mac_enforce_fs || !mac_enforce_vm)
|
|
return;
|
|
|
|
MAC_PERFORM(check_vnode_mmap_downgrade, cred, vp, vp->v_label,
|
|
&result);
|
|
|
|
*prot = result;
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp, int prot)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_mprotect");
|
|
|
|
if (!mac_enforce_fs || !mac_enforce_vm)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_mprotect, cred, vp, vp->v_label, prot);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_open(struct ucred *cred, struct vnode *vp, int acc_mode)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_open");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_open, cred, vp, vp->v_label, acc_mode);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_poll(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_poll");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_poll, active_cred, file_cred, vp,
|
|
vp->v_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_read(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_read");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_read, active_cred, file_cred, vp,
|
|
vp->v_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_readdir(struct ucred *cred, struct vnode *dvp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_readdir");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_readdir, cred, dvp, dvp->v_label);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_readlink");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_readlink, cred, vp, vp->v_label);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_check_vnode_relabel(struct ucred *cred, struct vnode *vp,
|
|
struct label *newlabel)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_relabel");
|
|
|
|
MAC_CHECK(check_vnode_relabel, cred, vp, vp->v_label, newlabel);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp,
|
|
struct vnode *vp, struct componentname *cnp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_rename_from");
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_rename_from");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_rename_from, cred, dvp, dvp->v_label, vp,
|
|
vp->v_label, cnp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp,
|
|
struct vnode *vp, int samedir, struct componentname *cnp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(dvp, "mac_check_vnode_rename_to");
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_rename_to");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_rename_to, cred, dvp, dvp->v_label, vp,
|
|
vp != NULL ? vp->v_label : NULL, samedir, cnp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_revoke");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_revoke, cred, vp, vp->v_label);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, acl_type_t type,
|
|
struct acl *acl)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_setacl");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_setacl, cred, vp, vp->v_label, type, acl);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp,
|
|
int attrnamespace, const char *name, struct uio *uio)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_setextattr");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_setextattr, cred, vp, vp->v_label,
|
|
attrnamespace, name, uio);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, u_long flags)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_setflags");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_setflags, cred, vp, vp->v_label, flags);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, mode_t mode)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_setmode");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_setmode, cred, vp, vp->v_label, mode);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, uid_t uid,
|
|
gid_t gid)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_setowner");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_setowner, cred, vp, vp->v_label, uid, gid);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp,
|
|
struct timespec atime, struct timespec mtime)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_setutimes");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_setutimes, cred, vp, vp->v_label, atime,
|
|
mtime);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_stat(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_stat");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_stat, active_cred, file_cred, vp,
|
|
vp->v_label);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_vnode_write(struct ucred *active_cred, struct ucred *file_cred,
|
|
struct vnode *vp)
|
|
{
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "mac_check_vnode_write");
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_vnode_write, active_cred, file_cred, vp,
|
|
vp->v_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
mac_relabel_vnode(struct ucred *cred, struct vnode *vp, struct label *newlabel)
|
|
{
|
|
|
|
MAC_PERFORM(relabel_vnode, cred, vp, vp->v_label, newlabel);
|
|
}
|
|
|
|
void
|
|
mac_create_mount(struct ucred *cred, struct mount *mp)
|
|
{
|
|
|
|
MAC_PERFORM(create_mount, cred, mp, mp->mnt_mntlabel,
|
|
mp->mnt_fslabel);
|
|
}
|
|
|
|
int
|
|
mac_check_mount_stat(struct ucred *cred, struct mount *mount)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_fs)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_mount_stat, cred, mount, mount->mnt_mntlabel);
|
|
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
mac_create_devfs_device(struct ucred *cred, struct mount *mp,
|
|
struct cdev *dev, struct devfs_dirent *de)
|
|
{
|
|
|
|
MAC_PERFORM(create_devfs_device, cred, mp, dev, de, de->de_label);
|
|
}
|
|
|
|
void
|
|
mac_create_devfs_symlink(struct ucred *cred, struct mount *mp,
|
|
struct devfs_dirent *dd, struct devfs_dirent *de)
|
|
{
|
|
|
|
MAC_PERFORM(create_devfs_symlink, cred, mp, dd, dd->de_label, de,
|
|
de->de_label);
|
|
}
|
|
|
|
void
|
|
mac_create_devfs_directory(struct mount *mp, char *dirname, int dirnamelen,
|
|
struct devfs_dirent *de)
|
|
{
|
|
|
|
MAC_PERFORM(create_devfs_directory, mp, dirname, dirnamelen, de,
|
|
de->de_label);
|
|
}
|
|
|
|
/*
|
|
* Implementation of VOP_SETLABEL() that relies on extended attributes
|
|
* to store label data. Can be referenced by filesystems supporting
|
|
* extended attributes.
|
|
*/
|
|
int
|
|
vop_stdsetlabel_ea(struct vop_setlabel_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct label *intlabel = ap->a_label;
|
|
int error;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "vop_stdsetlabel_ea");
|
|
|
|
if ((vp->v_mount->mnt_flag & MNT_MULTILABEL) == 0)
|
|
return (EOPNOTSUPP);
|
|
|
|
error = mac_setlabel_vnode_extattr(ap->a_cred, vp, intlabel);
|
|
if (error)
|
|
return (error);
|
|
|
|
mac_relabel_vnode(ap->a_cred, vp, intlabel);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vn_setlabel(struct vnode *vp, struct label *intlabel, struct ucred *cred)
|
|
{
|
|
int error;
|
|
|
|
if (vp->v_mount == NULL) {
|
|
/* printf("vn_setlabel: null v_mount\n"); */
|
|
if (vp->v_type != VNON)
|
|
printf("vn_setlabel: null v_mount with non-VNON\n");
|
|
return (EBADF);
|
|
}
|
|
|
|
if ((vp->v_mount->mnt_flag & MNT_MULTILABEL) == 0)
|
|
return (EOPNOTSUPP);
|
|
|
|
/*
|
|
* Multi-phase commit. First check the policies to confirm the
|
|
* change is OK. Then commit via the filesystem. Finally,
|
|
* update the actual vnode label. Question: maybe the filesystem
|
|
* should update the vnode at the end as part of VOP_SETLABEL()?
|
|
*/
|
|
error = mac_check_vnode_relabel(cred, vp, intlabel);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* VADMIN provides the opportunity for the filesystem to make
|
|
* decisions about who is and is not able to modify labels
|
|
* and protections on files. This might not be right. We can't
|
|
* assume VOP_SETLABEL() will do it, because we might implement
|
|
* that as part of vop_stdsetlabel_ea().
|
|
*/
|
|
error = VOP_ACCESS(vp, VADMIN, cred, curthread);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = VOP_SETLABEL(vp, intlabel, cred, curthread);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
mac_associate_nfsd_label(struct ucred *cred)
|
|
{
|
|
|
|
MAC_PERFORM(associate_nfsd_label, cred);
|
|
}
|