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- /*-
- * 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 <sys/cdefs.h>
- #include "opt_mac.h"
- #include <sys/param.h>
- #include <sys/kernel.h>
- #include <sys/lock.h>
- #include <sys/malloc.h>
- #include <sys/module.h>
- #include <sys/mutex.h>
- #include <sys/sbuf.h>
- #include <sys/sdt.h>
- #include <sys/systm.h>
- #include <sys/vnode.h>
- #include <sys/pipe.h>
- #include <sys/sysctl.h>
- #include <security/mac/mac_framework.h>
- #include <security/mac/mac_internal.h>
- #include <security/mac/mac_policy.h>
- 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);
- }
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