/*-
* Copyright (c) 2006 nCircle Network Security, Inc.
* Copyright (c) 2007 Robert N. M. Watson
* All rights reserved.
*
* This software was developed by Robert N. M. Watson for the TrustedBSD
* Project under contract to nCircle Network Security, 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, NCIRCLE NETWORK SECURITY,
* INC., 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.
*/
/*-
* Test that raising current resource limits above hard resource limits
* requires privilege. We test three cases:
*
* - Raise the current above the maximum (privileged).
* - Raise the current to the maximum (unprivileged).
* - Raise the maximum (privileged).
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <err.h>
#include <errno.h>
#include <unistd.h>
#include "main.h"
static int initialized;
static struct rlimit rl_base;
static struct rlimit rl_lowered;
int
priv_proc_setrlimit_setup(int asroot, int injail, struct test *test)
{
if (getrlimit(RLIMIT_DATA, &rl_base) < 0) {
warn("priv_proc_setrlimit_setup: getrlimit");
return (-1);
}
/*
* Must lower current and limit to make sure there's room to try to
* raise them during tests. Set current lower than max so we can
* raise it later also.
*/
rl_lowered = rl_base;
rl_lowered.rlim_cur -= 20;
rl_lowered.rlim_max -= 10;
if (setrlimit(RLIMIT_DATA, &rl_lowered) < 0) {
warn("priv_proc_setrlimit_setup: setrlimit");
return (-1);
}
initialized = 1;
return (0);
}
/*
* Try increasing the maximum limits on the process, which requires
* privilege.
*/
void
priv_proc_setrlimit_raisemax(int asroot, int injail, struct test *test)
{
struct rlimit rl;
int error;
rl = rl_lowered;
rl.rlim_max = rl_base.rlim_max;
error = setrlimit(RLIMIT_DATA, &rl);
if (asroot && injail)
expect("priv_proc_setrlimit_raisemax(asroot, injail)", error,
0, 0);
if (asroot && !injail)
expect("priv_proc_setrlimit_raisemax(asroot, !injail)",
error, 0, 0);
if (!asroot && injail)
expect("priv_proc_setrlimit_raisemax(!asroot, injail)",
error, -1, EPERM);
if (!asroot && !injail)
expect("priv_proc_setrlimit_raisemax(!asroot, !injail)",
error, -1, EPERM);
}
/*
* Try setting the current limit to the current maximum, which is allowed
* without privilege.
*/
void
priv_proc_setrlimit_raisecur_nopriv(int asroot, int injail,
struct test *test)
{
struct rlimit rl;
int error;
rl = rl_lowered;
rl.rlim_cur = rl.rlim_max;
error = setrlimit(RLIMIT_DATA, &rl);
if (asroot && injail)
expect("priv_proc_setrlimit_raiscur_nopriv(asroot, injail)",
error, 0, 0);
if (asroot && !injail)
expect("priv_proc_setrlimit_raisecur_nopriv(asroot, !injail)",
error, 0, 0);
if (!asroot && injail)
expect("priv_proc_setrlimit_raisecur_nopriv(!asroot, injail)",
error, 0, 0);
if (!asroot && !injail)
expect("priv_proc_setrlimit_raisecur_nopriv(!asroot, !injail)",
error, 0, 0);
}
/*
* Try raising the current limits above the maximum, which requires
* privilege.
*/
void
priv_proc_setrlimit_raisecur(int asroot, int injail, struct test *test)
{
struct rlimit rl;
int error;
rl = rl_lowered;
rl.rlim_cur = rl.rlim_max + 10;
error = setrlimit(RLIMIT_DATA, &rl);
if (asroot && injail)
expect("priv_proc_setrlimit_raisecur(asroot, injail)", error,
0, 0);
if (asroot && !injail)
expect("priv_proc_setrlimit_raisecur(asroot, !injail)",
error, 0, 0);
if (!asroot && injail)
expect("priv_proc_setrlimit_raisecur(!asroot, injail)",
error, -1, EPERM);
if (!asroot && !injail)
expect("priv_proc_setrlimit_raisecur(!asroot, !injail)",
error, -1, EPERM);
}
void
priv_proc_setrlimit_cleanup(int asroot, int injail, struct test *test)
{
if (initialized)
(void)setrlimit(RLIMIT_DATA, &rl_base);
initialized = 0;
}
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