blob: 1f2cb0159b8d83b243b79785a12e75f5ce8a3eab (
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
|
// SPDX-License-Identifier: GPL-2.0-only
#include <stddef.h>
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
struct S {
int x;
};
struct C {
int x;
int y;
};
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__uint(max_entries, 1);
__type(key, __u32);
__type(value, struct S);
} map SEC(".maps");
enum E {
E_ITEM
};
static int global_data_x = 100;
static int volatile global_data_y = 500;
__noinline int foo(const struct S *s)
{
if (s)
return bpf_get_prandom_u32() < s->x;
return 0;
}
__noinline int bar(int *x)
{
if (x)
*x &= bpf_get_prandom_u32();
return 0;
}
__noinline int baz(volatile int *x)
{
if (x)
*x &= bpf_get_prandom_u32();
return 0;
}
__noinline int qux(enum E *e)
{
if (e)
return *e;
return 0;
}
__noinline int quux(int (*arr)[10])
{
if (arr)
return (*arr)[9];
return 0;
}
__noinline int quuz(int **p)
{
if (p)
*p = NULL;
return 0;
}
SEC("cgroup_skb/ingress")
__success
int global_func9(struct __sk_buff *skb)
{
int result = 0;
{
const struct S s = {.x = skb->len };
result |= foo(&s);
}
{
const __u32 key = 1;
const struct S *s = bpf_map_lookup_elem(&map, &key);
result |= foo(s);
}
{
const struct C c = {.x = skb->len, .y = skb->family };
result |= foo((const struct S *)&c);
}
{
result |= foo(NULL);
}
{
bar(&result);
bar(&global_data_x);
}
{
result |= baz(&global_data_y);
}
{
enum E e = E_ITEM;
result |= qux(&e);
}
{
int array[10] = {0};
result |= quux(&array);
}
{
int *p;
result |= quuz(&p);
}
return result ? 1 : 0;
}
|
