/*- * Copyright (c) 2002-2003 Networks Associates Technology, Inc. * Copyright (c) 2006 SPARTA, Inc. * Copyright (c) 2009 Robert N. M. Watson * All rights reserved. * * This software was developed for the FreeBSD Project in part by Network * Associates Laboratories, the Security Research Division of Network * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), * as part of the DARPA CHATS research program. * * This software was enhanced by SPARTA ISSO under SPAWAR contract * N66001-04-C-6019 ("SEFOS"). * * This software was developed at the University of Cambridge Computer * Laboratory with support from a grant from Google, Inc. * * 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. */ #include #include "opt_mac.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct label * mac_pipe_label_alloc(void) { struct label *label; label = mac_labelzone_alloc(M_WAITOK); MAC_POLICY_PERFORM(pipe_init_label, label); return (label); } void mac_pipe_init(struct pipepair *pp) { if (mac_labeled & MPC_OBJECT_PIPE) pp->pp_label = mac_pipe_label_alloc(); else pp->pp_label = NULL; } void mac_pipe_label_free(struct label *label) { MAC_POLICY_PERFORM_NOSLEEP(pipe_destroy_label, label); mac_labelzone_free(label); } void mac_pipe_destroy(struct pipepair *pp) { if (pp->pp_label != NULL) { mac_pipe_label_free(pp->pp_label); pp->pp_label = NULL; } } void mac_pipe_copy_label(struct label *src, struct label *dest) { MAC_POLICY_PERFORM_NOSLEEP(pipe_copy_label, src, dest); } int mac_pipe_externalize_label(struct label *label, char *elements, char *outbuf, size_t outbuflen) { int error; MAC_POLICY_EXTERNALIZE(pipe, label, elements, outbuf, outbuflen); return (error); } int mac_pipe_internalize_label(struct label *label, char *string) { int error; MAC_POLICY_INTERNALIZE(pipe, label, string); return (error); } void mac_pipe_create(struct ucred *cred, struct pipepair *pp) { MAC_POLICY_PERFORM_NOSLEEP(pipe_create, cred, pp, pp->pp_label); } static void mac_pipe_relabel(struct ucred *cred, struct pipepair *pp, struct label *newlabel) { MAC_POLICY_PERFORM_NOSLEEP(pipe_relabel, cred, pp, pp->pp_label, newlabel); } MAC_CHECK_PROBE_DEFINE4(pipe_check_ioctl, "struct ucred *", "struct pipepair *", "unsigned long", "void *"); int mac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp, unsigned long cmd, void *data) { int error; mtx_assert(&pp->pp_mtx, MA_OWNED); MAC_POLICY_CHECK_NOSLEEP(pipe_check_ioctl, cred, pp, pp->pp_label, cmd, data); MAC_CHECK_PROBE4(pipe_check_ioctl, error, cred, pp, cmd, data); return (error); } MAC_CHECK_PROBE_DEFINE2(pipe_check_poll, "struct ucred *", "struct pipepair *"); int mac_pipe_check_poll_impl(struct ucred *cred, struct pipepair *pp) { int error; mtx_assert(&pp->pp_mtx, MA_OWNED); MAC_POLICY_CHECK_NOSLEEP(pipe_check_poll, cred, pp, pp->pp_label); MAC_CHECK_PROBE2(pipe_check_poll, error, cred, pp); return (error); } MAC_CHECK_PROBE_DEFINE2(pipe_check_read, "struct ucred *", "struct pipepair *"); int mac_pipe_check_read_impl(struct ucred *cred, struct pipepair *pp) { int error; mtx_assert(&pp->pp_mtx, MA_OWNED); MAC_POLICY_CHECK_NOSLEEP(pipe_check_read, cred, pp, pp->pp_label); MAC_CHECK_PROBE2(pipe_check_read, error, cred, pp); return (error); } MAC_CHECK_PROBE_DEFINE3(pipe_check_relabel, "struct ucred *", "struct pipepair *", "struct label *"); static int mac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp, struct label *newlabel) { int error; mtx_assert(&pp->pp_mtx, MA_OWNED); MAC_POLICY_CHECK_NOSLEEP(pipe_check_relabel, cred, pp, pp->pp_label, newlabel); MAC_CHECK_PROBE3(pipe_check_relabel, error, cred, pp, newlabel); return (error); } MAC_CHECK_PROBE_DEFINE2(pipe_check_stat, "struct ucred *", "struct pipepair *"); int mac_pipe_check_stat(struct ucred *cred, struct pipepair *pp) { int error; mtx_assert(&pp->pp_mtx, MA_OWNED); MAC_POLICY_CHECK_NOSLEEP(pipe_check_stat, cred, pp, pp->pp_label); MAC_CHECK_PROBE2(pipe_check_stat, error, cred, pp); return (error); } MAC_CHECK_PROBE_DEFINE2(pipe_check_write, "struct ucred *", "struct pipepair *"); int mac_pipe_check_write(struct ucred *cred, struct pipepair *pp) { int error; mtx_assert(&pp->pp_mtx, MA_OWNED); MAC_POLICY_CHECK_NOSLEEP(pipe_check_write, cred, pp, pp->pp_label); MAC_CHECK_PROBE2(pipe_check_write, error, cred, pp); return (error); } int mac_pipe_label_set(struct ucred *cred, struct pipepair *pp, struct label *label) { int error; mtx_assert(&pp->pp_mtx, MA_OWNED); error = mac_pipe_check_relabel(cred, pp, label); if (error) return (error); mac_pipe_relabel(cred, pp, label); return (0); }