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/*-
* Copyright (c) 2006 nCircle Network Security, Inc.
* 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.
*
* $FreeBSD$
*/
/*
* Test that raising current resource limits above hard resource limits
* requires privilege. There is one privilege check, but two conditions:
*
* - To raise the current above the maximum.
*
* - To raise the maximum.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <err.h>
#include <errno.h>
#include <unistd.h>
#include "main.h"
void
priv_proc_setrlimit(void)
{
struct rlimit rl, rl_lower, rl_raise_max, rl_raise_cur;
int error;
assert_root();
/*
* To make sure that there is room to raise the resource limit, we
* must first lower it. Otherwise, if the resource limit is already
* at the global maximum, that complicates matters. In principle, we
* can bump into privilege failures during setup, but there's not
* much we can do about that. Keep this prototypical setting around
* as the target to restore to later.
*/
if (getrlimit(RLIMIT_DATA, &rl) < 0)
err(-1, "getrlimit(RLIMIT_DATA)");
/*
* What to lower to before trying to raise.
*/
rl_lower = rl;
rl_lower.rlim_cur -= 10;
rl_lower.rlim_max = rl_lower.rlim_cur;
/*
* Raise the maximum.
*/
rl_raise_max = rl;
rl_raise_max.rlim_max += 10;
/*
* Raise the current above the maximum.
*/
rl_raise_cur = rl;
rl_raise_cur.rlim_cur += 10;
/*
* Test raising the maximum with privilege.
*/
if (setrlimit(RLIMIT_DATA, &rl_lower) < 0)
err(-1, "setrlimit(RLIMIT_DATA, lower) as root");
if (setrlimit(RLIMIT_DATA, &rl_raise_max) < 0)
err(-1, "setrlimit(RLIMIT_DATA, raise_max) as root");
/*
* Test raising the current above the maximum with privilege.
*/
if (setrlimit(RLIMIT_DATA, &rl_lower) < 0)
err(-1, "setrlimit(RLIMIT_DATA, lower) as root");
if (setrlimit(RLIMIT_DATA, &rl_raise_cur) < 0)
err(-1, "setrlimit(RLIMIT_DATA, raise_cur) as root");
/*
* Test raising the maximum without privilege.
*/
if (setrlimit(RLIMIT_DATA, &rl_lower) < 0)
err(-1, "setrlimit(RLIMIT_DATA, lower) as root");
set_euid(UID_OTHER);
error = setrlimit(RLIMIT_DATA, &rl_raise_max);
if (error == 0)
errx(-1,
"setrlimit(RLIMIT_DATA, raise_max) succeeded as !root");
if (errno != EPERM)
err(-1, "setrlimit(RLIMIT_DATA, raise_max) wrong errno %d "
"as !root", errno);
/*
* Test raising the current above the maximum without privilege.
*/
set_euid(UID_ROOT);
if (setrlimit(RLIMIT_DATA, &rl_lower) < 0)
err(-1, "setrlimit(RLIMIT_DATA, lower) as root");
set_euid(UID_OTHER);
error = setrlimit(RLIMIT_DATA, &rl_raise_cur);
if (error == 0)
errx(-1,
"setrlimit(RLIMIT_DATA, raise_cur) succeeded as !root");
if (errno != EPERM)
err(-1, "setrlimit(RLIMIT_DATA, raise_cur) wrong errno %d "
"as !root", errno);
}
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