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
136
137
138
139
140
141
142
143
144
|
/* Check for GLOB_TIDLE heap allocation issues (bugs 22320, 22325, 22332).
Copyright (C) 2017-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <glob.h>
#include <mcheck.h>
#include <nss.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/support.h>
/* Flag which indicates whether to pass the GLOB_ONLYDIR flag. */
static int do_onlydir;
/* Flag which indicates whether to pass the GLOB_NOCHECK flag. */
static int do_nocheck;
/* Flag which indicates whether to pass the GLOB_MARK flag. */
static int do_mark;
/* Flag which indicates whether to pass the GLOB_NOESCAPE flag. */
static int do_noescape;
static void
one_test (const char *prefix, const char *middle, const char *suffix)
{
char *pattern = xasprintf ("%s%s%s", prefix, middle, suffix);
int flags = GLOB_TILDE;
if (do_onlydir)
flags |= GLOB_ONLYDIR;
if (do_nocheck)
flags |= GLOB_NOCHECK;
if (do_mark)
flags |= GLOB_MARK;
if (do_noescape)
flags |= GLOB_NOESCAPE;
glob_t gl;
/* This glob call might result in crashes or memory leaks. */
if (glob (pattern, flags, NULL, &gl) == 0)
globfree (&gl);
free (pattern);
}
enum
{
/* The largest base being tested. */
largest_base_size = 500000,
/* The actual size is the base size plus a variable whose absolute
value is not greater than this. This helps malloc to trigger
overflows. */
max_size_skew = 16,
/* The maximum string length supported by repeating_string
below. */
repeat_size = largest_base_size + max_size_skew,
};
/* Used to construct strings which repeat a single character 'x'. */
static char *repeat;
/* Return a string of SIZE characters. */
const char *
repeating_string (int size)
{
TEST_VERIFY (size >= 0);
TEST_VERIFY (size <= repeat_size);
const char *repeated_shifted = repeat + repeat_size - size;
TEST_VERIFY (strlen (repeated_shifted) == size);
return repeated_shifted;
}
static int
do_test (void)
{
/* Avoid network-based NSS modules and initialize nss_files with a
dummy lookup. This has to come before mtrace because NSS does
not free all memory. */
__nss_configure_lookup ("passwd", "files");
(void) getpwnam ("root");
mtrace ();
repeat = xmalloc (repeat_size + 1);
memset (repeat, 'x', repeat_size);
repeat[repeat_size] = '\0';
/* These numbers control the size of the user name. The values
cover the minimum (0), a typical size (8), a large
stack-allocated size (100000), and a somewhat large
heap-allocated size (largest_base_size). */
static const int base_sizes[] = { 0, 8, 100, 100000, largest_base_size, -1 };
for (do_onlydir = 0; do_onlydir < 2; ++do_onlydir)
for (do_nocheck = 0; do_nocheck < 2; ++do_nocheck)
for (do_mark = 0; do_mark < 2; ++do_mark)
for (do_noescape = 0; do_noescape < 2; ++do_noescape)
for (int base_idx = 0; base_sizes[base_idx] >= 0; ++base_idx)
{
for (int size_skew = -max_size_skew; size_skew <= max_size_skew;
++size_skew)
{
int size = base_sizes[base_idx] + size_skew;
if (size < 0)
continue;
const char *user_name = repeating_string (size);
one_test ("~", user_name, "/a/b");
one_test ("~", user_name, "x\\x\\x////x\\a");
}
const char *user_name = repeating_string (base_sizes[base_idx]);
one_test ("~", user_name, "");
one_test ("~", user_name, "/");
one_test ("~", user_name, "/a");
one_test ("~", user_name, "/*/*");
one_test ("~", user_name, "\\/");
one_test ("/~", user_name, "");
one_test ("*/~", user_name, "/a/b");
}
free (repeat);
return 0;
}
#define TIMEOUT 200
#include <support/test-driver.c>
|
