1/*-
2 * Copyright (c) 2015 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
6 * under sponsorship from the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD$");
32
33#include <sys/param.h>
34#include <errno.h>
35#include <limits.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <unistd.h>
39#include <atf-c.h>
40#include <vm/vm.h>
41#include <vm/pmap.h>
42#include <machine/vmparam.h>
43
44static int scratch_file;
45
46static int
47copyin_checker(uintptr_t uaddr, size_t len)
48{
49	ssize_t ret;
50
51	ret = write(scratch_file, (const void *)uaddr, len);
52	return (ret == -1 ? errno : 0);
53}
54
55#define	FMAX	ULONG_MAX
56
57ATF_TC_WITHOUT_HEAD(kern_copyin);
58ATF_TC_BODY(kern_copyin, tc)
59{
60	char template[] = "copyin.XXXXXX";
61
62#ifdef __mips__
63	/*
64	 * MIPS has different VM layout: the UVA map on mips ends the
65	 * highest mapped entry at the VM_MAXUSER_ADDRESS - PAGE_SIZE,
66	 * while all other arches map either stack or shared page up
67	 * to the VM_MAXUSER_ADDRESS.
68	 */
69	atf_tc_skip("Platform is not supported.");
70#endif
71
72	scratch_file = mkstemp(template);
73	ATF_REQUIRE(scratch_file != -1);
74	unlink(template);
75
76	ATF_CHECK(copyin_checker(0, 0) == 0);
77	ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS - 10, 9) == 0);
78	ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS - 10, 10) == 0);
79	ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS - 10, 11) == EFAULT);
80	ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS - 1, 1) == 0);
81	ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS, 0) == 0);
82	ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS, 1) == EFAULT);
83	ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS, 2) == EFAULT);
84	ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS + 1, 0) == 0);
85	ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS + 1, 2) == EFAULT);
86	ATF_CHECK(copyin_checker(FMAX - 10, 9) == EFAULT);
87	ATF_CHECK(copyin_checker(FMAX - 10, 10) == EFAULT);
88	ATF_CHECK(copyin_checker(FMAX - 10, 11) == EFAULT);
89}
90
91ATF_TP_ADD_TCS(tp)
92{
93
94	ATF_TP_ADD_TC(tp, kern_copyin);
95	return (atf_no_error());
96}
97