FreeBSD/Linux Kernel Cross Reference
sys/security/mac/mac_system.c

     /*-
      * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
      * Copyright (c) 2007 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.
     *
     * Portions of this software were developed by Robert Watson for the
     * TrustedBSD Project.
     *
     * 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.
     */
    
    /*
     * MAC Framework entry points relating to overall operation of system,
     * including global services such as the kernel environment and loadable
     * modules.
     *
     * System checks often align with existing privilege checks, but provide
     * additional security context that may be relevant to policies, such as the
     * specific object being operated on.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #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/systm.h>
    #include <sys/vnode.h>
    #include <sys/sysctl.h>
    
    #include <security/mac/mac_framework.h>
    #include <security/mac/mac_internal.h>
    #include <security/mac/mac_policy.h>
    
    int
    mac_check_kenv_dump(struct ucred *cred)
    {
            int error;
    
            MAC_CHECK(check_kenv_dump, cred);
    
            return (error);
    }
    
    int
    mac_check_kenv_get(struct ucred *cred, char *name)
    {
            int error;
    
            MAC_CHECK(check_kenv_get, cred, name);
    
            return (error);
    }
    
    int
    mac_check_kenv_set(struct ucred *cred, char *name, char *value)
    {
            int error;
    
            MAC_CHECK(check_kenv_set, cred, name, value);
    
            return (error);
    }
    
    int
    mac_check_kenv_unset(struct ucred *cred, char *name)
    {
            int error;
    
           MAC_CHECK(check_kenv_unset, cred, name);
   
           return (error);
   }
   
   int
   mac_check_kld_load(struct ucred *cred, struct vnode *vp)
   {
           int error;
   
           ASSERT_VOP_LOCKED(vp, "mac_check_kld_load");
   
           MAC_CHECK(check_kld_load, cred, vp, vp->v_label);
   
           return (error);
   }
   
   int
   mac_check_kld_stat(struct ucred *cred)
   {
           int error;
   
           MAC_CHECK(check_kld_stat, cred);
   
           return (error);
   }
   
   int
   mac_check_system_acct(struct ucred *cred, struct vnode *vp)
   {
           int error;
   
           if (vp != NULL) {
                   ASSERT_VOP_LOCKED(vp, "mac_check_system_acct");
           }
   
           MAC_CHECK(check_system_acct, cred, vp,
               vp != NULL ? vp->v_label : NULL);
   
           return (error);
   }
   
   int
   mac_check_system_reboot(struct ucred *cred, int howto)
   {
           int error;
   
           MAC_CHECK(check_system_reboot, cred, howto);
   
           return (error);
   }
   
   int
   mac_check_system_swapon(struct ucred *cred, struct vnode *vp)
   {
           int error;
   
           ASSERT_VOP_LOCKED(vp, "mac_check_system_swapon");
   
           MAC_CHECK(check_system_swapon, cred, vp, vp->v_label);
           return (error);
   }
   
   int
   mac_check_system_swapoff(struct ucred *cred, struct vnode *vp)
   {
           int error;
   
           ASSERT_VOP_LOCKED(vp, "mac_check_system_swapoff");
   
           MAC_CHECK(check_system_swapoff, cred, vp, vp->v_label);
           return (error);
   }
   
   int
   mac_check_system_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
       void *arg1, int arg2, struct sysctl_req *req)
   {
           int error;
   
           /*
            * XXXMAC: We would very much like to assert the SYSCTL_LOCK here,
            * but since it's not exported from kern_sysctl.c, we can't.
            */
           MAC_CHECK(check_system_sysctl, cred, oidp, arg1, arg2, req);
   
           return (error);
   }

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