codeql/cpp/ql/test/query-tests/Critical/OverflowCalculated/tests1.cpp at sauyon/java-spring-stringutils · ByteDecoder/codeql · GitHub

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
// tests1.cpp

typedef unsigned int size_t;

size_t strlen(const char *str);
size_t wcslen(const wchar_t *wcs);

char *strcpy(char *destination, const char *source);
wchar_t *wcscpy(wchar_t *strDestination, const wchar_t *strSource);

void *malloc(size_t size);
void *calloc(size_t num, size_t size);
void *realloc(void* ptr, size_t size);
void free(void *ptr);

void tests1(int case_num)
{
	const char *str = "abc";
	const wchar_t *wstr = L"12345";
	char *buffer = 0;
	wchar_t *wbuffer = 0;

	switch (case_num)
	{
		case 1:
			buffer = (char *)malloc(strlen(str)); // BAD
			strcpy(buffer, str);
			break;

		case 2:
			buffer = (char *)malloc(strlen(str) + 1); // GOOD
			strcpy(buffer, str);
			break;

		case 3:
			buffer = (char *)malloc(strlen(str) * sizeof(char)); // BAD
			strcpy(buffer, str);
			break;

		case 4:
			buffer = (char *)malloc((strlen(str) + 1) * sizeof(char)); // GOOD
			strcpy(buffer, str);
			break;

		case 5:
			buffer = (char *)calloc(strlen(str), sizeof(char)); // BAD [NOT DETECTED]
			strcpy(buffer, str);
			break;

		case 6:
			buffer = (char *)calloc(strlen(str) + 1, sizeof(char)); // GOOD
			strcpy(buffer, str);
			break;

		case 7:
			buffer = (char *)realloc(buffer, strlen(str)); // BAD
			strcpy(buffer, str);
			break;

		case 8:
			buffer = (char *)realloc(buffer, strlen(str) + 1); // GOOD
			strcpy(buffer, str);
			break;

		case 9:
			int len1 = strlen(str);
			buffer = (char *)malloc(len1); // BAD
			strcpy(buffer, str);
			break;

		case 10:
			int len2 = strlen(str) + 1;
			buffer = (char *)malloc(len2); // GOOD
			strcpy(buffer, str);
			break;

		case 11:
			int len3 = strlen(str);
			buffer = (char *)malloc(len3 + 1); // GOOD
			strcpy(buffer, str);
			break;

		case 12:
			buffer = (char *)malloc(strlen(str) + 0); // BAD [NOT DETECTED]
			strcpy(buffer, str);
			break;

		case 101:
			wbuffer = (wchar_t *)malloc(wcslen(wstr)); // BAD
			wcscpy(wbuffer, wstr);
			break;

		case 102:
			wbuffer = (wchar_t *)malloc(wcslen(wstr) + 1); // BAD (no sizeof) [NOT DETECTED]
			wcscpy(wbuffer, wstr);
			break;

		case 103:
			wbuffer = (wchar_t *)calloc(wcslen(wstr), sizeof(char)); // BAD [NOT DETECTED]
			wcscpy(wbuffer, wstr);
			break;

		case 104:
			wbuffer = (wchar_t *)calloc(wcslen(wstr) + 1, sizeof(char)); // BAD (wrong sizeof) [NOT DETECTED]
			wcscpy(wbuffer, wstr);
			break;

		case 105:
			wbuffer = (wchar_t *)malloc(wcslen(wstr) * sizeof(wchar_t)); // BAD
			wcscpy(wbuffer, wstr);
			break;

		case 106:
			wbuffer = (wchar_t *)malloc((wcslen(wstr) + 1) * sizeof(wchar_t)); // GOOD
			wcscpy(wbuffer, wstr);
			break;

		case 107:
			wbuffer = (wchar_t *)calloc(wcslen(wstr), sizeof(wchar_t)); // BAD [NOT DETECTED]
			wcscpy(wbuffer, wstr);
			break;

		case 108:
			wbuffer = (wchar_t *)calloc(wcslen(wstr) + 1, sizeof(wchar_t)); // GOOD
			wcscpy(wbuffer, wstr);
			break;
	}

	if (buffer != 0)
	{
		free(buffer);
	}
	if (wbuffer != 0)
	{
		free(wbuffer);
	}
}