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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
// Copyright (c) 2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <tinyformat.h>
#include <util/strencodings.h>
#include <algorithm>
#include <cstdint>
#include <string>
#include <vector>
void test_one_input(const std::vector<uint8_t>& buffer)
{
FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
const std::string format_string = fuzzed_data_provider.ConsumeRandomLengthString(64);
const int digits_in_format_specifier = std::count_if(format_string.begin(), format_string.end(), IsDigit);
// Avoid triggering the following crash bug:
// * strprintf("%987654321000000:", 1);
//
// Avoid triggering the following OOM bug:
// * strprintf("%.222222200000000$", 1.1);
//
// Upstream bug report: https://github.com/c42f/tinyformat/issues/70
if (format_string.find('%') != std::string::npos && digits_in_format_specifier >= 7) {
return;
}
// Avoid triggering the following crash bug:
// * strprintf("%1$*1$*", -11111111);
//
// Upstream bug report: https://github.com/c42f/tinyformat/issues/70
if (format_string.find('%') != std::string::npos && format_string.find('$') != std::string::npos && format_string.find('*') != std::string::npos && digits_in_format_specifier > 0) {
return;
}
// Avoid triggering the following crash bug:
// * strprintf("%.1s", (char*)nullptr);
//
// (void)strprintf(format_string, (char*)nullptr);
//
// Upstream bug report: https://github.com/c42f/tinyformat/issues/70
try {
(void)strprintf(format_string, (signed char*)nullptr);
} catch (const tinyformat::format_error&) {
}
try {
(void)strprintf(format_string, (unsigned char*)nullptr);
} catch (const tinyformat::format_error&) {
}
try {
(void)strprintf(format_string, (void*)nullptr);
} catch (const tinyformat::format_error&) {
}
try {
(void)strprintf(format_string, (bool*)nullptr);
} catch (const tinyformat::format_error&) {
}
try {
(void)strprintf(format_string, (float*)nullptr);
} catch (const tinyformat::format_error&) {
}
try {
(void)strprintf(format_string, (double*)nullptr);
} catch (const tinyformat::format_error&) {
}
try {
(void)strprintf(format_string, (int16_t*)nullptr);
} catch (const tinyformat::format_error&) {
}
try {
(void)strprintf(format_string, (uint16_t*)nullptr);
} catch (const tinyformat::format_error&) {
}
try {
(void)strprintf(format_string, (int32_t*)nullptr);
} catch (const tinyformat::format_error&) {
}
try {
(void)strprintf(format_string, (uint32_t*)nullptr);
} catch (const tinyformat::format_error&) {
}
try {
(void)strprintf(format_string, (int64_t*)nullptr);
} catch (const tinyformat::format_error&) {
}
try {
(void)strprintf(format_string, (uint64_t*)nullptr);
} catch (const tinyformat::format_error&) {
}
try {
switch (fuzzed_data_provider.ConsumeIntegralInRange(0, 5)) {
case 0:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeRandomLengthString(32));
break;
case 1:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeRandomLengthString(32).c_str());
break;
case 2:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeIntegral<signed char>());
break;
case 3:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeIntegral<unsigned char>());
break;
case 4:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeIntegral<char>());
break;
case 5:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeBool());
break;
}
} catch (const tinyformat::format_error&) {
}
if (format_string.find('%') != std::string::npos && format_string.find('c') != std::string::npos) {
// Avoid triggering the following:
// * strprintf("%c", 1.31783e+38);
// tinyformat.h:244:36: runtime error: 1.31783e+38 is outside the range of representable values of type 'char'
return;
}
if (format_string.find('%') != std::string::npos && format_string.find('*') != std::string::npos) {
// Avoid triggering the following:
// * strprintf("%*", -2.33527e+38);
// tinyformat.h:283:65: runtime error: -2.33527e+38 is outside the range of representable values of type 'int'
// * strprintf("%*", -2147483648);
// tinyformat.h:763:25: runtime error: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself
return;
}
try {
switch (fuzzed_data_provider.ConsumeIntegralInRange(0, 7)) {
case 0:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeFloatingPoint<float>());
break;
case 1:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeFloatingPoint<double>());
break;
case 2:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeIntegral<int16_t>());
break;
case 3:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeIntegral<uint16_t>());
break;
case 4:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeIntegral<int32_t>());
break;
case 5:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeIntegral<uint32_t>());
break;
case 6:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeIntegral<int64_t>());
break;
case 7:
(void)strprintf(format_string, fuzzed_data_provider.ConsumeIntegral<uint64_t>());
break;
}
} catch (const tinyformat::format_error&) {
}
}
|
