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/*-
* Copyright (c) 2009 Simon L. Nielsen <simon@FreeBSD.org>,
* Bjoern A. Zeeb <bz@FreeBSD.org>
*
* 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/sysctl.h>
#include <atf-c.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
static const struct {
void *addr;
int ok[2]; /* Depending on security.bsd.map_at_zero {0, !=0}. */
} map_at_zero_tests[] = {
{ (void *)0, { 0, 1 } }, /* Test sysctl. */
{ (void *)1, { 0, 0 } },
{ (void *)(PAGE_SIZE - 1), { 0, 0 } },
{ (void *)PAGE_SIZE, { 1, 1 } },
{ (void *)-1, { 0, 0 } },
{ (void *)(-PAGE_SIZE), { 0, 0 } },
{ (void *)(-1 - PAGE_SIZE), { 0, 0 } },
{ (void *)(-1 - PAGE_SIZE - 1), { 0, 0 } },
{ (void *)(0x1000 * PAGE_SIZE), { 1, 1 } },
};
#define MAP_AT_ZERO "security.bsd.map_at_zero"
ATF_TC_WITHOUT_HEAD(mmap__map_at_zero);
ATF_TC_BODY(mmap__map_at_zero, tc)
{
void *p;
size_t len;
unsigned int i;
int map_at_zero;
len = sizeof(map_at_zero);
if (sysctlbyname(MAP_AT_ZERO, &map_at_zero, &len, NULL, 0) == -1) {
atf_tc_skip("sysctl for %s failed: %s\n", MAP_AT_ZERO,
strerror(errno));
return;
}
/* Normalize to 0 or 1 for array access. */
map_at_zero = !!map_at_zero;
for (i = 0; i < nitems(map_at_zero_tests); i++) {
p = mmap((void *)map_at_zero_tests[i].addr, PAGE_SIZE,
PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_FIXED,
-1, 0);
if (p == MAP_FAILED) {
ATF_CHECK_MSG(map_at_zero_tests[i].ok[map_at_zero] == 0,
"mmap(%p, ...) failed", map_at_zero_tests[i].addr);
} else {
ATF_CHECK_MSG(map_at_zero_tests[i].ok[map_at_zero] == 1,
"mmap(%p, ...) succeeded: p=%p\n",
map_at_zero_tests[i].addr, p);
}
}
}
static void
checked_mmap(int prot, int flags, int fd, int error, const char *msg)
{
void *p;
p = mmap(NULL, getpagesize(), prot, flags, fd, 0);
if (p == MAP_FAILED) {
if (error == 0)
ATF_CHECK_MSG(0, "%s failed with errno %d", msg,
errno);
else
ATF_CHECK_EQ_MSG(error, errno,
"%s failed with wrong errno %d (expected %d)", msg,
errno, error);
} else {
ATF_CHECK_MSG(error == 0, "%s succeeded", msg);
munmap(p, getpagesize());
}
}
ATF_TC_WITHOUT_HEAD(mmap__bad_arguments);
ATF_TC_BODY(mmap__bad_arguments, tc)
{
int fd;
ATF_REQUIRE((fd = shm_open(SHM_ANON, O_RDWR, 0644)) >= 0);
ATF_REQUIRE(ftruncate(fd, getpagesize()) == 0);
/* These should work. */
checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON, -1, 0,
"simple MAP_ANON");
checked_mmap(PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0,
"simple shm fd shared");
checked_mmap(PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0,
"simple shm fd private");
/* Extra PROT flags. */
checked_mmap(PROT_READ | PROT_WRITE | 0x100000, MAP_ANON, -1, EINVAL,
"MAP_ANON with extra PROT flags");
checked_mmap(0xffff, MAP_SHARED, fd, EINVAL,
"shm fd with garbage PROT");
/* Undefined flag. */
checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_RESERVED0080, -1,
EINVAL, "Undefined flag");
/* Both MAP_SHARED and MAP_PRIVATE */
checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE |
MAP_SHARED, -1, EINVAL, "MAP_ANON with both SHARED and PRIVATE");
checked_mmap(PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_SHARED, fd,
EINVAL, "shm fd with both SHARED and PRIVATE");
/* At least one of MAP_SHARED or MAP_PRIVATE without ANON */
checked_mmap(PROT_READ | PROT_WRITE, 0, fd, EINVAL,
"shm fd without sharing flag");
/* MAP_ANON with either sharing flag (impacts fork). */
checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED, -1, 0,
"shared MAP_ANON");
checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0,
"private MAP_ANON");
/* MAP_ANON should require an fd of -1. */
checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, 0, EINVAL,
"MAP_ANON with fd != -1");
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, mmap__map_at_zero);
ATF_TP_ADD_TC(tp, mmap__bad_arguments);
return (atf_no_error());
}
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