2087a58ca2
privilege grants so that dtrace can be more easily used to monitor the security decisions being generated by the MAC Framework following policy invocation. Successful access control checks will be reported by: mac_framework:kernel:<entrypoint>:mac_check_ok Failed access control checks will be reported by: mac_framework:kernel:<entrypoint>:mac_check_err Successful privilege grants will be reported by: mac_framework:kernel:priv_grant:mac_grant_ok Failed privilege grants will be reported by: mac_framework:kernel:priv_grant:mac_grant_err In all cases, the return value (always 0 for _ok, otherwise an errno for _err) will be reported via arg0 on the probe, and subsequent arguments will hold entrypoint-specific data, in a style similar to privilege tracing. Obtained from: TrustedBSD Project Sponsored by: Google, Inc.
199 lines
5.2 KiB
C
199 lines
5.2 KiB
C
/*-
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* Copyright (c) 2003-2006 SPARTA, Inc.
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* Copyright (c) 2009 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project in part by Network
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* Associates Laboratories, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
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* as part of the DARPA 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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* This software was developed at the University of Cambridge Computer
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* Laboratory with support from a grant from Google, Inc.
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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_kdtrace.h"
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#include "opt_mac.h"
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#include "opt_posix.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/ksem.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/sdt.h>
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#include <sys/systm.h>
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#include <sys/sysctl.h>
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#include <security/mac/mac_framework.h>
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#include <security/mac/mac_internal.h>
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#include <security/mac/mac_policy.h>
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static struct label *
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mac_posixsem_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(posixsem_init_label, label);
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return (label);
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}
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void
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mac_posixsem_init(struct ksem *ks)
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{
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if (mac_labeled & MPC_OBJECT_POSIXSEM)
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ks->ks_label = mac_posixsem_label_alloc();
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else
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ks->ks_label = NULL;
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}
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static void
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mac_posixsem_label_free(struct label *label)
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{
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MAC_PERFORM(posixsem_destroy_label, label);
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mac_labelzone_free(label);
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}
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void
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mac_posixsem_destroy(struct ksem *ks)
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{
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if (ks->ks_label != NULL) {
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mac_posixsem_label_free(ks->ks_label);
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ks->ks_label = NULL;
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}
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}
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void
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mac_posixsem_create(struct ucred *cred, struct ksem *ks)
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{
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MAC_PERFORM(posixsem_create, cred, ks, ks->ks_label);
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}
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MAC_CHECK_PROBE_DEFINE2(posixsem_check_open, "struct ucred *",
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"struct ksem *");
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int
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mac_posixsem_check_open(struct ucred *cred, struct ksem *ks)
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{
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int error;
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MAC_CHECK(posixsem_check_open, cred, ks, ks->ks_label);
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MAC_CHECK_PROBE2(posixsem_check_open, error, cred, ks);
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return (error);
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}
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MAC_CHECK_PROBE_DEFINE3(posixsem_check_getvalue, "struct ucred *",
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"struct ucred *", "struct ksem *");
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int
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mac_posixsem_check_getvalue(struct ucred *active_cred, struct ucred *file_cred,
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struct ksem *ks)
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{
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int error;
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MAC_CHECK(posixsem_check_getvalue, active_cred, file_cred, ks,
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ks->ks_label);
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MAC_CHECK_PROBE3(posixsem_check_getvalue, error, active_cred,
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file_cred, ks);
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return (error);
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}
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MAC_CHECK_PROBE_DEFINE3(posixsem_check_post, "struct ucred *",
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"struct ucred *", "struct ksem *");
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int
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mac_posixsem_check_post(struct ucred *active_cred, struct ucred *file_cred,
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struct ksem *ks)
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{
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int error;
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MAC_CHECK(posixsem_check_post, active_cred, file_cred, ks,
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ks->ks_label);
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MAC_CHECK_PROBE3(posixsem_check_post, error, active_cred, file_cred,
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ks);
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return (error);
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}
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MAC_CHECK_PROBE_DEFINE3(posixsem_check_stat, "struct ucred *",
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"struct ucred *", "struct ksem *");
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int
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mac_posixsem_check_stat(struct ucred *active_cred, struct ucred *file_cred,
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struct ksem *ks)
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{
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int error;
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MAC_CHECK(posixsem_check_stat, active_cred, file_cred, ks,
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ks->ks_label);
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MAC_CHECK_PROBE3(posixsem_check_stat, error, active_cred, file_cred,
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ks);
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return (error);
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}
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MAC_CHECK_PROBE_DEFINE2(posixsem_check_unlink, "struct ucred *",
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"struct ksem *");
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int
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mac_posixsem_check_unlink(struct ucred *cred, struct ksem *ks)
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{
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int error;
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MAC_CHECK(posixsem_check_unlink, cred, ks, ks->ks_label);
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MAC_CHECK_PROBE2(posixsem_check_unlink, error, cred, ks);
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return (error);
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}
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MAC_CHECK_PROBE_DEFINE3(posixsem_check_wait, "struct ucred *",
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"struct ucred *", "struct ksem *");
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int
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mac_posixsem_check_wait(struct ucred *active_cred, struct ucred *file_cred,
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struct ksem *ks)
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{
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int error;
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MAC_CHECK(posixsem_check_wait, active_cred, file_cred, ks,
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ks->ks_label);
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MAC_CHECK_PROBE3(posixsem_check_wait, error, active_cred, file_cred,
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ks);
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return (error);
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}
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