summaryrefslogtreecommitdiff
path: root/tests/lib/libc/string/t_memmem.c
blob: c64f4151a24d6fb3a1a168a4019379969024ad35 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
/*	$NetBSD: t_memmem.c,v 1.6 2020/11/27 16:50:02 christos Exp $ */

/*-
 * Copyright (c) 2005 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Perry E. Metzger of Metzger, Dowdeswell & Co. LLC.
 *
 * 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 <atf-c.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>

char p0[] = "";
int lp0 = 0;
char p1[] = "0123";
int lp1 = 4;
char p2[] = "456";
int lp2 = 3;
char p3[] = "789";
int lp3 = 3;
char p4[] = "abc";
int lp4 = 3;
char p5[] = "0";
int lp5 = 1;
char p6[] = "9";
int lp6 = 1;
char p7[] = "654";
int lp7 = 3;
char p8[] = "89abc";
int lp8 = 5;

char b0[] = "";
int lb0 = 0;
char b1[] = "0";
int lb1 = 1;
char b2[] = "0123456789";
int lb2 = 10;

#define expect(b)							\
	if (!(b)) {							\
		fprintf(stderr, "failed on line %d\n", __LINE__);	\
		atf_tc_fail("Check stderr for test id/line");		\
	}

ATF_TC(memmem_basic);
ATF_TC_HEAD(memmem_basic, tc)
{

	atf_tc_set_md_var(tc, "descr", "Test memmem results");
}

ATF_TC_BODY(memmem_basic, tc)
{

	expect(memmem(b2, lb2, p0, lp0) == b2);
	expect(memmem(b0, lb0, p0, lp0) == b0);
	expect(memmem(b0, lb0, p1, lp1) == NULL);
	expect(memmem(b1, lb1, p1, lp1) == NULL);

	expect(memmem(b2, lb2, p1, lp1) == b2);
	expect(memmem(b2, lb2, p2, lp2) == (b2 + 4));
	expect(memmem(b2, lb2, p3, lp3) == (b2 + 7));

	expect(memmem(b2, lb2, p5, lp5) == b2);
	expect(memmem(b2, lb2, p6, lp6) == (b2 + 9));

	expect(memmem(b2, lb2, p4, lp4) == NULL);
	expect(memmem(b2, lb2, p7, lp7) == NULL);
	expect(memmem(b2, lb2, p8, lp8) == NULL);
}

ATF_TC(memmem_oob);
ATF_TC_HEAD(memmem_oob, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test memmem out of bounds read");
}

ATF_TC_BODY(memmem_oob, tc)
{
	static const char str[] = "abcde";
	size_t pg = getpagesize();
	char *src = mmap(NULL, 2 * pg, PROT_READ|PROT_WRITE,
	    MAP_ANON|MAP_PRIVATE, -1, (off_t)0);
	ATF_CHECK(src != MAP_FAILED);
	char *guard = mmap(src + pg, pg,
	    PROT_NONE, MAP_ANON|MAP_PRIVATE|MAP_FIXED, -1, (off_t)0);
printf("%p\n", guard);
	for (size_t i = 2; i < 5; i++) {
		char *search = src + pg - i;
		char match[sizeof(str)];
		search[-1] = str[0];
		search[0] = str[0];
		search[1] = str[0];
		memcpy(match, str, i);
		ATF_CHECK(memmem(search, i, match, i) != search);
	}
	munmap(guard, pg);
	munmap(src, pg);
}


ATF_TP_ADD_TCS(tp)
{

	ATF_TP_ADD_TC(tp, memmem_basic);
	ATF_TP_ADD_TC(tp, memmem_oob);

	return atf_no_error();
}