Basic tests for setrlimit(2).

This commit is contained in:
jruoho 2011-04-05 19:02:22 +00:00
parent c5f754b958
commit 28d491ccd9
3 changed files with 494 additions and 7 deletions

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@ -1,4 +1,4 @@
# $NetBSD: mi,v 1.293 2011/04/05 08:24:28 jruoho Exp $
# $NetBSD: mi,v 1.294 2011/04/05 19:02:22 jruoho Exp $
#
# Note: don't delete entries from here - mark them as "obsolete" instead.
#
@ -574,6 +574,7 @@
./usr/libdata/debug/usr/tests/syscall/t_getsid.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_mmap.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_mprotect.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_setrlimit.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_setuid.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_timer.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_umask.debug tests-syscall-debug debug,atf
@ -2120,6 +2121,7 @@
./usr/tests/syscall/t_getsid tests-syscall-tests atf
./usr/tests/syscall/t_mmap tests-syscall-tests atf
./usr/tests/syscall/t_mprotect tests-syscall-tests atf
./usr/tests/syscall/t_setrlimit tests-syscall-tests atf
./usr/tests/syscall/t_setuid tests-syscall-tests atf
./usr/tests/syscall/t_timer tests-syscall-tests atf
./usr/tests/syscall/t_umask tests-syscall-tests atf

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@ -1,17 +1,17 @@
# $NetBSD: Makefile,v 1.18 2011/04/04 19:08:43 jruoho Exp $
# $NetBSD: Makefile,v 1.19 2011/04/05 19:02:23 jruoho Exp $
.include <bsd.own.mk>
TESTSDIR= ${TESTSBASE}/syscall
TESTS_C+= t_access t_cmsg t_dup t_fsync t_getpid t_getsid
TESTS_C+= t_mmap t_mprotect t_setuid t_timer t_umask
TESTS_C+= t_mmap t_mprotect t_setrlimit t_setuid t_timer t_umask
LDADD.t_getpid+=-lpthread
LDADD.t_timer+= -lpthread
LDADD.t_getpid+= -lpthread
LDADD.t_timer+= -lpthread
LDADD.t_cmsg+= -lrumpnet_local -lrumpnet_net -lrumpnet
LDADD.t_cmsg+= -lrumpvfs -lrump -lrumpuser -lpthread
LDADD.t_cmsg+= -lrumpnet_local -lrumpnet_net -lrumpnet
LDADD.t_cmsg+= -lrumpvfs -lrump -lrumpuser -lpthread
WARNS= 4

485
tests/syscall/t_setrlimit.c Normal file
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@ -0,0 +1,485 @@
/* $NetBSD: t_setrlimit.c,v 1.1 2011/04/05 19:02:23 jruoho Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jukka Ruohonen.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: t_setrlimit.c,v 1.1 2011/04/05 19:02:23 jruoho Exp $");
#include <sys/resource.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <atf-c.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void sighandler(int);
static const char path[] = "/tmp/setrlimit";
static const int rlimit[] = {
RLIMIT_AS,
RLIMIT_CORE,
RLIMIT_CPU,
RLIMIT_DATA,
RLIMIT_FSIZE,
RLIMIT_MEMLOCK,
RLIMIT_NOFILE,
RLIMIT_NPROC,
RLIMIT_RSS,
RLIMIT_SBSIZE,
RLIMIT_STACK
};
ATF_TC(setrlimit_basic);
ATF_TC_HEAD(setrlimit_basic, tc)
{
atf_tc_set_md_var(tc, "descr", "A basic soft limit test");
}
ATF_TC_BODY(setrlimit_basic, tc)
{
struct rlimit res;
int *buf, lim;
size_t i;
buf = calloc(__arraycount(rlimit), sizeof(int));
if (buf == NULL)
atf_tc_fail("initialization failed");
for (i = lim = 0; i < __arraycount(rlimit); i++) {
(void)memset(&res, 0, sizeof(struct rlimit));
if (getrlimit(rlimit[i], &res) != 0)
continue;
if (res.rlim_cur == RLIM_INFINITY)
continue;
if (res.rlim_cur == res.rlim_max) /* An unprivileged run. */
continue;
buf[i] = res.rlim_cur;
res.rlim_cur = res.rlim_cur - 1;
if (setrlimit(rlimit[i], &res) != 0) {
lim = rlimit[i];
goto out;
}
}
out:
for (i = 0; i < __arraycount(rlimit); i++) {
(void)memset(&res, 0, sizeof(struct rlimit));
if (buf[i] == 0)
continue;
if (getrlimit(rlimit[i], &res) != 0)
continue;
res.rlim_cur = buf[i];
(void)setrlimit(rlimit[i], &res);
}
if (lim != 0)
atf_tc_fail("failed to set limit (%d)", lim);
}
ATF_TC(setrlimit_current);
ATF_TC_HEAD(setrlimit_current, tc)
{
atf_tc_set_md_var(tc, "descr", "setrlimit(3) with current limits");
}
ATF_TC_BODY(setrlimit_current, tc)
{
struct rlimit res;
size_t i;
for (i = 0; i < __arraycount(rlimit); i++) {
(void)memset(&res, 0, sizeof(struct rlimit));
ATF_REQUIRE(getrlimit(rlimit[i], &res) == 0);
ATF_REQUIRE(setrlimit(rlimit[i], &res) == 0);
}
}
ATF_TC(setrlimit_err);
ATF_TC_HEAD(setrlimit_err, tc)
{
atf_tc_set_md_var(tc, "descr", "Test error conditions");
}
ATF_TC_BODY(setrlimit_err, tc)
{
struct rlimit res;
size_t i;
for (i = 0; i < __arraycount(rlimit); i++) {
errno = 0;
ATF_REQUIRE(getrlimit(rlimit[i], (void *)0) != 0);
ATF_REQUIRE(errno == EFAULT);
}
errno = 0;
ATF_REQUIRE(getrlimit(INT_MAX, &res) != 0);
ATF_REQUIRE(errno == EINVAL);
}
ATF_TC_WITH_CLEANUP(setrlimit_fsize);
ATF_TC_HEAD(setrlimit_fsize, tc)
{
atf_tc_set_md_var(tc, "descr", "Test setrlimit(2), RLIMIT_FSIZE");
}
ATF_TC_BODY(setrlimit_fsize, tc)
{
struct rlimit res;
int fd, sta;
pid_t pid;
fd = open(path, O_RDWR | O_CREAT, 0700);
if (fd < 0)
atf_tc_fail("initialization failed");
pid = fork();
ATF_REQUIRE(pid >= 0);
if (pid == 0) {
(void)memset(&res, 0, sizeof(struct rlimit));
res.rlim_cur = 2;
res.rlim_max = 2;
if (setrlimit(RLIMIT_FSIZE, &res) != 0)
_exit(EXIT_FAILURE);
if (signal(SIGXFSZ, sighandler) == SIG_ERR)
_exit(EXIT_FAILURE);
/*
* The third call should generate a SIGXFSZ.
*/
(void)write(fd, "X", 1);
(void)write(fd, "X", 1);
(void)write(fd, "X", 1);
_exit(EXIT_FAILURE);
}
(void)close(fd);
(void)wait(&sta);
(void)unlink(path);
if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
atf_tc_fail("RLIMIT_FSIZE not enforced");
}
ATF_TC_CLEANUP(setrlimit_fsize, tc)
{
(void)unlink(path);
}
static void
sighandler(int signo)
{
if (signo != SIGXFSZ)
_exit(EXIT_FAILURE);
_exit(EXIT_SUCCESS);
}
ATF_TC(setrlimit_memlock);
ATF_TC_HEAD(setrlimit_memlock, tc)
{
atf_tc_set_md_var(tc, "descr", "Test setrlimit(2), RLIMIT_MEMLOCK");
}
ATF_TC_BODY(setrlimit_memlock, tc)
{
struct rlimit res;
void *buf;
long page;
pid_t pid;
int sta;
page = sysconf(_SC_PAGESIZE);
ATF_REQUIRE(page >= 0);
buf = malloc(page);
pid = fork();
if (buf == NULL || pid < 0)
atf_tc_fail("initialization failed");
if (pid == 0) {
/*
* Try to lock a page while
* RLIMIT_MEMLOCK is zero.
*/
if (mlock(buf, page) != 0)
_exit(EXIT_FAILURE);
if (munlock(buf, page) != 0)
_exit(EXIT_FAILURE);
res.rlim_cur = 0;
res.rlim_max = 0;
if (setrlimit(RLIMIT_MEMLOCK, &res) != 0)
_exit(EXIT_FAILURE);
if (mlock(buf, page) != 0)
_exit(EXIT_SUCCESS);
(void)munlock(buf, page);
_exit(EXIT_SUCCESS);
}
free(buf);
(void)wait(&sta);
if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
atf_tc_fail("RLIMIT_MEMLOCK not enforced");
}
ATF_TC(setrlimit_nofile_1);
ATF_TC_HEAD(setrlimit_nofile_1, tc)
{
atf_tc_set_md_var(tc, "descr", "Test setrlimit(2), RLIMIT_NOFILE, #1");
}
ATF_TC_BODY(setrlimit_nofile_1, tc)
{
struct rlimit res;
int fd, i, rv, sta;
pid_t pid;
res.rlim_cur = 0;
res.rlim_max = 0;
pid = fork();
ATF_REQUIRE(pid >= 0);
if (pid == 0) {
/*
* Close all descriptors, set RLIMIT_NOFILE
* to zero, and try to open a random file.
* This should fail with EMFILE.
*/
for (i = 0; i < 1024; i++)
(void)close(i);
rv = setrlimit(RLIMIT_NOFILE, &res);
if (rv != 0)
_exit(EXIT_FAILURE);
errno = 0;
fd = open("/etc/passwd", O_RDONLY);
if (fd >= 0 || errno != EMFILE)
_exit(EXIT_FAILURE);
_exit(EXIT_SUCCESS);
}
(void)wait(&sta);
if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
atf_tc_fail("RLIMIT_NOFILE not enforced");
}
ATF_TC(setrlimit_nofile_2);
ATF_TC_HEAD(setrlimit_nofile_2, tc)
{
atf_tc_set_md_var(tc, "descr", "Test setrlimit(2), RLIMIT_NOFILE, #2");
}
ATF_TC_BODY(setrlimit_nofile_2, tc)
{
static const rlim_t lim = 12;
struct rlimit res;
int fd, i, rv, sta;
pid_t pid;
/*
* See that an arbitrary limit on
* open files is being enforced.
*/
res.rlim_cur = lim;
res.rlim_max = lim;
pid = fork();
ATF_REQUIRE(pid >= 0);
if (pid == 0) {
for (i = 0; i < 1024; i++)
(void)close(i);
rv = setrlimit(RLIMIT_NOFILE, &res);
if (rv != 0)
_exit(EXIT_FAILURE);
for (i = 0; i < (int)lim; i++) {
fd = open("/etc/passwd", O_RDONLY);
if (fd < 0)
_exit(EXIT_FAILURE);
}
/*
* After the limit has been reached,
* EMFILE should again follow.
*/
fd = open("/etc/passwd", O_RDONLY);
if (fd >= 0 || errno != EMFILE)
_exit(EXIT_FAILURE);
_exit(EXIT_SUCCESS);
}
(void)wait(&sta);
if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
atf_tc_fail("RLIMIT_NOFILE not enforced");
}
ATF_TC(setrlimit_nproc);
ATF_TC_HEAD(setrlimit_nproc, tc)
{
atf_tc_set_md_var(tc, "descr", "Test setrlimit(2), RLIMIT_NPROC");
atf_tc_set_md_var(tc, "require.user", "unprivileged");
}
ATF_TC_BODY(setrlimit_nproc, tc)
{
struct rlimit res;
pid_t pid, cpid;
int sta;
pid = fork();
ATF_REQUIRE(pid >= 0);
if (pid == 0) {
/*
* Set RLIMIT_NPROC to zero and try to fork.
*/
(void)memset(&res, 0, sizeof(struct rlimit));
res.rlim_cur = 0;
res.rlim_max = 0;
if (setrlimit(RLIMIT_NPROC, &res) != 0)
_exit(EXIT_FAILURE);
cpid = fork();
if (cpid < 0)
_exit(EXIT_SUCCESS);
_exit(EXIT_FAILURE);
}
(void)waitpid(pid, &sta, 0);
if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
atf_tc_fail("RLIMIT_NPROC not enforced");
}
ATF_TC(setrlimit_perm);
ATF_TC_HEAD(setrlimit_perm, tc)
{
atf_tc_set_md_var(tc, "descr", "Test setrlimit(2) for EPERM");
atf_tc_set_md_var(tc, "require.user", "unprivileged");
}
ATF_TC_BODY(setrlimit_perm, tc)
{
struct rlimit res;
size_t i;
/*
* Try to raise the maximum limits as an user.
*/
for (i = 0; i < __arraycount(rlimit); i++) {
ATF_REQUIRE(getrlimit(rlimit[i], &res) == 0);
if (res.rlim_max == UINT64_MAX) /* Overflow. */
continue;
errno = 0;
res.rlim_max = res.rlim_max + 1;
ATF_REQUIRE(setrlimit(rlimit[i], &res) != 0);
ATF_REQUIRE(errno == EPERM);
}
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, setrlimit_basic);
ATF_TP_ADD_TC(tp, setrlimit_current);
ATF_TP_ADD_TC(tp, setrlimit_err);
ATF_TP_ADD_TC(tp, setrlimit_fsize);
ATF_TP_ADD_TC(tp, setrlimit_memlock);
ATF_TP_ADD_TC(tp, setrlimit_nofile_1);
ATF_TP_ADD_TC(tp, setrlimit_nofile_2);
ATF_TP_ADD_TC(tp, setrlimit_nproc);
ATF_TP_ADD_TC(tp, setrlimit_perm);
return atf_no_error();
}