2f5eb093a4
work present in FreeBSD 7.0 to refine the kernel privilege model: - Introduce support for jail as a testing variable, in order to confirm that privileges are properly restricted in the jail environment. - Restructure overall testing approach so that privilege and jail conditions are set in the testing infrastructure before tests are invoked, and done so in a custom-created process to isolate the impact of tests from each other in a more consistent way. - Tests now provide setup and cleanup hooks that occur before and after the test runs. - New privilege tests are now present for several audit privileges, several credential management privileges, dmesg buffer reading privilege, and netinet raw socket creation. - Other existing tests are restructured and generally improved as a result of better framework structure and jail as a variable. For exampe, we now test that certain sysctls are writable only outside jail, while others are writable within jail. On a similar note, privileges relating to setting UFS file flags are now better exercised, as with the right to chmod and utimes files. Approved by: re (bmah) Obtained from: TrustedBSD Project
330 lines
9.3 KiB
C
330 lines
9.3 KiB
C
/*-
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* Copyright (c) 2006 nCircle Network Security, Inc.
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* Copyright (c) 2007 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed by Robert N. M. Watson for the TrustedBSD
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* Project under contract to nCircle Network Security, 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, NCIRCLE NETWORK SECURITY,
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* INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Test privilege associated with real time process settings. There are
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* three relevant notions of privilege:
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*
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* - Privilege to set the real-time priority of the current process.
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* - Privilege to set the real-time priority of another process.
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* - Privilege to set the idle priority of another process.
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* - No privilege to set the idle priority of the current process.
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*
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* This requires a test process and a target (dummy) process running with
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* various uids. This test is based on the code in the setpriority() test.
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*/
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#include <sys/types.h>
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#include <sys/rtprio.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "main.h"
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static int childproc_running;
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static pid_t childproc;
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int
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priv_sched_rtprio_setup(int asroot, int injail, struct test *test)
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{
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int another_uid, need_child;
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/*
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* Some tests require a second process with specific credentials.
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* Set that up here, and kill in cleanup.
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*/
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need_child = 0;
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if (test->t_test_func == priv_sched_rtprio_aproc_normal ||
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test->t_test_func == priv_sched_rtprio_aproc_idle ||
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test->t_test_func == priv_sched_rtprio_aproc_realtime) {
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need_child = 1;
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another_uid = 1;
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}
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if (test->t_test_func == priv_sched_rtprio_myproc_normal ||
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test->t_test_func == priv_sched_rtprio_myproc_idle ||
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test->t_test_func == priv_sched_rtprio_myproc_realtime) {
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need_child = 1;
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}
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if (need_child) {
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childproc = fork();
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if (childproc < 0) {
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warn("priv_sched_setup: fork");
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return (-1);
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}
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if (childproc == 0) {
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if (another_uid) {
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if (setresuid(UID_THIRD, UID_THIRD,
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UID_THIRD) < 0)
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err(-1, "setresuid(%d)", UID_THIRD);
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}
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while (1)
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sleep(1);
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}
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childproc_running = 1;
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sleep(1); /* Allow dummy thread to change uids. */
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}
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return (0);
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}
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void
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priv_sched_rtprio_curproc_normal(int asroot, int injail, struct test *test)
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{
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struct rtprio rtp;
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int error;
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rtp.type = RTP_PRIO_NORMAL;
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rtp.prio = 0;
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error = rtprio(RTP_SET, 0, &rtp);
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if (asroot && injail)
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expect("priv_sched_rtprio_curproc_normal(asroot, injail)",
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error, 0, 0);
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if (asroot && !injail)
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expect("priv_sched_rtprio_curproc_normal(asroot, !injail)",
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error, 0, 0);
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if (!asroot && injail)
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expect("priv_sched_rtprio_curproc_normal(!asroot, injail)",
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error, 0, 0);
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if (!asroot && !injail)
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expect("priv_sched_rtprio_curproc_normal(!asroot, !injail)",
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error, 0, 0);
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}
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void
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priv_sched_rtprio_curproc_idle(int asroot, int injail, struct test *test)
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{
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struct rtprio rtp;
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int error;
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rtp.type = RTP_PRIO_IDLE;
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rtp.prio = 0;
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error = rtprio(RTP_SET, 0, &rtp);
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if (asroot && injail)
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expect("priv_sched_rtprio_curproc_idle(asroot, injail)",
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error, -1, EPERM);
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if (asroot && !injail)
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expect("priv_sched_rtprio_curproc_idle(asroot, !injail)",
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error, 0, 0);
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if (!asroot && injail)
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expect("priv_sched_rtprio_curproc_idle(!asroot, injail)",
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error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_sched_rtprio_curproc_idle(!asroot, !injail)",
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error, -1, EPERM);
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}
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void
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priv_sched_rtprio_curproc_realtime(int asroot, int injail, struct test *test)
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{
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struct rtprio rtp;
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int error;
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rtp.type = RTP_PRIO_REALTIME;
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rtp.prio = 0;
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error = rtprio(RTP_SET, 0, &rtp);
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if (asroot && injail)
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expect("priv_sched_rtprio_curproc_realtime(asroot, injail)",
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error, -1, EPERM);
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if (asroot && !injail)
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expect("priv_sched_rtprio_curproc_realtime(asroot, !injail)",
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error, 0, 0);
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if (!asroot && injail)
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expect("priv_sched_rtprio_curproc_realtime(!asroot, injail)",
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error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_sched_rtprio_curproc_realtime(!asroot, !injail)",
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error, -1, EPERM);
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}
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void
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priv_sched_rtprio_myproc_normal(int asroot, int injail, struct test *test)
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{
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struct rtprio rtp;
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int error;
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rtp.type = RTP_PRIO_NORMAL;
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rtp.prio = 0;
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error = rtprio(RTP_SET, 0, &rtp);
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if (asroot && injail)
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expect("priv_sched_rtprio_myproc_normal(asroot, injail)",
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error, 0, 0);
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if (asroot && !injail)
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expect("priv_sched_rtprio_myproc_normal(asroot, !injail)",
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error, 0, 0);
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if (!asroot && injail)
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expect("priv_sched_rtprio_myproc_normal(!asroot, injail)",
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error, 0, 0);
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if (!asroot && !injail)
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expect("priv_sched_rtprio_myproc_normal(!asroot, !injail)",
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error, 0, 0);
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}
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void
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priv_sched_rtprio_myproc_idle(int asroot, int injail, struct test *test)
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{
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struct rtprio rtp;
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int error;
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rtp.type = RTP_PRIO_IDLE;
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rtp.prio = 0;
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error = rtprio(RTP_SET, 0, &rtp);
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if (asroot && injail)
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expect("priv_sched_rtprio_myproc_idle(asroot, injail)",
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error, -1, EPERM);
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if (asroot && !injail)
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expect("priv_sched_rtprio_myproc_idle(asroot, !injail)",
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error, 0, 0);
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if (!asroot && injail)
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expect("priv_sched_rtprio_myproc_idle(!asroot, injail)",
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error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_sched_rtprio_myproc_idle(!asroot, !injail)",
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error, -1, EPERM);
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}
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void
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priv_sched_rtprio_myproc_realtime(int asroot, int injail, struct test *test)
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{
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struct rtprio rtp;
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int error;
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rtp.type = RTP_PRIO_REALTIME;
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rtp.prio = 0;
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error = rtprio(RTP_SET, 0, &rtp);
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if (asroot && injail)
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expect("priv_sched_rtprio_myproc_realtime(asroot, injail)",
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error, -1, EPERM);
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if (asroot && !injail)
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expect("priv_sched_rtprio_myproc_realtime(asroot, !injail)",
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error, 0, 0);
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if (!asroot && injail)
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expect("priv_sched_rtprio_myproc_realtime(!asroot, injail)",
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error, -1, EPERM);
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if (!asroot && !injail)
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expect("priv_sched_rtprio_myproc_realtime(!asroot, !injail)",
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error, -1, EPERM);
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}
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void
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priv_sched_rtprio_aproc_normal(int asroot, int injail, struct test *test)
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{
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struct rtprio rtp;
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int error;
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rtp.type = RTP_PRIO_NORMAL;
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rtp.prio = 0;
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error = rtprio(RTP_SET, childproc, &rtp);
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if (asroot && injail)
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expect("priv_sched_rtprio_aproc_normal(asroot, injail)",
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error, -1, ESRCH);
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if (asroot && !injail)
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expect("priv_sched_rtprio_aproc_normal(asroot, !injail)",
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error, 0, 0);
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if (!asroot && injail)
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expect("priv_sched_rtprio_aproc_normal(!asroot, injail)",
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error, -1, ESRCH);
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if (!asroot && !injail)
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expect("priv_sched_rtprio_aproc_normal(!asroot, !injail)",
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error, -1, EPERM);
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}
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void
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priv_sched_rtprio_aproc_idle(int asroot, int injail, struct test *test)
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{
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struct rtprio rtp;
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int error;
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rtp.type = RTP_PRIO_IDLE;
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rtp.prio = 0;
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error = rtprio(RTP_SET, childproc, &rtp);
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if (asroot && injail)
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expect("priv_sched_rtprio_aproc_idle(asroot, injail)",
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error, -1, ESRCH);
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if (asroot && !injail)
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expect("priv_sched_rtprio_aproc_idle(asroot, !injail)",
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error, 0, 0);
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if (!asroot && injail)
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expect("priv_sched_rtprio_aproc_idle(!asroot, injail)",
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error, -1, ESRCH);
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if (!asroot && !injail)
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expect("priv_sched_rtprio_aroc_idle(!asroot, !injail)",
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error, -1, EPERM);
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}
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void
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priv_sched_rtprio_aproc_realtime(int asroot, int injail, struct test *test)
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{
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struct rtprio rtp;
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int error;
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rtp.type = RTP_PRIO_REALTIME;
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rtp.prio = 0;
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error = rtprio(RTP_SET, childproc, &rtp);
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if (asroot && injail)
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expect("priv_sched_rtprio_aproc_realtime(asroot, injail)",
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error, -1, ESRCH);
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if (asroot && !injail)
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expect("priv_sched_rtprio_aproc_realtime(asroot, !injail)",
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error, 0, 0);
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if (!asroot && injail)
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expect("priv_sched_rtprio_aproc_realtime(!asroot, injail)",
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error, -1, ESRCH);
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if (!asroot && !injail)
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expect("priv_sched_rtprio_aproc_realtime(!asroot, !injail)",
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error, -1, EPERM);
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}
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void
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priv_sched_rtprio_cleanup(int asroot, int injail, struct test *test)
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{
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pid_t pid;
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if (childproc_running) {
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(void)kill(childproc, SIGKILL);
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while (1) {
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pid = waitpid(childproc, NULL, 0);
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if (pid == -1)
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warn("waitpid(%d (test), NULL, 0)",
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childproc);
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if (pid == childproc)
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break;
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}
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childproc_running = 0;
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childproc = -1;
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}
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}
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