1 // SPDX-License-Identifier: GPL-2.0
2 #include <vmlinux.h>
3 #include <limits.h>
4 #include <bpf/bpf_tracing.h>
5 #include <bpf/bpf_helpers.h>
6 #include <bpf/bpf_core_read.h>
7 #include <bpf/bpf_endian.h>
8 #include "bpf_misc.h"
9 #include "bpf_experimental.h"
10
11 #define check_assert(type, op, name, value) \
12 SEC("?tc") \
13 __log_level(2) __failure \
14 int check_assert_##name(void *ctx) \
15 { \
16 type num = bpf_ktime_get_ns(); \
17 bpf_assert(bpf_cmp_unlikely(num, op, value)); \
18 return *(u64 *)num; \
19 }
20
21 __msg(": R0_w=0xffffffff80000000")
22 check_assert(s64, ==, eq_int_min, INT_MIN);
23 __msg(": R0_w=0x7fffffff")
24 check_assert(s64, ==, eq_int_max, INT_MAX);
25 __msg(": R0_w=0")
26 check_assert(s64, ==, eq_zero, 0);
27 __msg(": R0_w=0x8000000000000000 R1_w=0x8000000000000000")
28 check_assert(s64, ==, eq_llong_min, LLONG_MIN);
29 __msg(": R0_w=0x7fffffffffffffff R1_w=0x7fffffffffffffff")
30 check_assert(s64, ==, eq_llong_max, LLONG_MAX);
31
32 __msg(": R0_w=scalar(id=1,smax=0x7ffffffe)")
33 check_assert(s64, <, lt_pos, INT_MAX);
34 __msg(": R0_w=scalar(id=1,smax=-1,umin=0x8000000000000000,var_off=(0x8000000000000000; 0x7fffffffffffffff))")
35 check_assert(s64, <, lt_zero, 0);
36 __msg(": R0_w=scalar(id=1,smax=0xffffffff7fffffff")
37 check_assert(s64, <, lt_neg, INT_MIN);
38
39 __msg(": R0_w=scalar(id=1,smax=0x7fffffff)")
40 check_assert(s64, <=, le_pos, INT_MAX);
41 __msg(": R0_w=scalar(id=1,smax=0)")
42 check_assert(s64, <=, le_zero, 0);
43 __msg(": R0_w=scalar(id=1,smax=0xffffffff80000000")
44 check_assert(s64, <=, le_neg, INT_MIN);
45
46 __msg(": R0_w=scalar(id=1,smin=umin=0x80000000,umax=0x7fffffffffffffff,var_off=(0x0; 0x7fffffffffffffff))")
47 check_assert(s64, >, gt_pos, INT_MAX);
48 __msg(": R0_w=scalar(id=1,smin=umin=1,umax=0x7fffffffffffffff,var_off=(0x0; 0x7fffffffffffffff))")
49 check_assert(s64, >, gt_zero, 0);
50 __msg(": R0_w=scalar(id=1,smin=0xffffffff80000001")
51 check_assert(s64, >, gt_neg, INT_MIN);
52
53 __msg(": R0_w=scalar(id=1,smin=umin=0x7fffffff,umax=0x7fffffffffffffff,var_off=(0x0; 0x7fffffffffffffff))")
54 check_assert(s64, >=, ge_pos, INT_MAX);
55 __msg(": R0_w=scalar(id=1,smin=0,umax=0x7fffffffffffffff,var_off=(0x0; 0x7fffffffffffffff))")
56 check_assert(s64, >=, ge_zero, 0);
57 __msg(": R0_w=scalar(id=1,smin=0xffffffff80000000")
58 check_assert(s64, >=, ge_neg, INT_MIN);
59
60 SEC("?tc")
61 __log_level(2) __failure
62 __msg(": R0=0 R1=ctx() R2=scalar(smin=0xffffffff80000002,smax=smax32=0x7ffffffd,smin32=0x80000002) R10=fp0")
63 int check_assert_range_s64(struct __sk_buff *ctx)
64 {
65 struct bpf_sock *sk = ctx->sk;
66 s64 num;
67
68 _Static_assert(_Generic((sk->rx_queue_mapping), s32: 1, default: 0), "type match");
69 if (!sk)
70 return 0;
71 num = sk->rx_queue_mapping;
72 bpf_assert_range(num, INT_MIN + 2, INT_MAX - 2);
73 return *((u8 *)ctx + num);
74 }
75
76 SEC("?tc")
77 __log_level(2) __failure
78 __msg(": R1=ctx() R2=scalar(smin=umin=smin32=umin32=4096,smax=umax=smax32=umax32=8192,var_off=(0x0; 0x3fff))")
79 int check_assert_range_u64(struct __sk_buff *ctx)
80 {
81 u64 num = ctx->len;
82
83 bpf_assert_range(num, 4096, 8192);
84 return *((u8 *)ctx + num);
85 }
86
87 SEC("?tc")
88 __log_level(2) __failure
89 __msg(": R0=0 R1=ctx() R2=4096 R10=fp0")
90 int check_assert_single_range_s64(struct __sk_buff *ctx)
91 {
92 struct bpf_sock *sk = ctx->sk;
93 s64 num;
94
95 _Static_assert(_Generic((sk->rx_queue_mapping), s32: 1, default: 0), "type match");
96 if (!sk)
97 return 0;
98 num = sk->rx_queue_mapping;
99
100 bpf_assert_range(num, 4096, 4096);
101 return *((u8 *)ctx + num);
102 }
103
104 SEC("?tc")
105 __log_level(2) __failure
106 __msg(": R1=ctx() R2=4096 R10=fp0")
107 int check_assert_single_range_u64(struct __sk_buff *ctx)
108 {
109 u64 num = ctx->len;
110
111 bpf_assert_range(num, 4096, 4096);
112 return *((u8 *)ctx + num);
113 }
114
115 SEC("?tc")
116 __log_level(2) __failure
117 __msg(": R1=pkt(off=64,r=64) R2=pkt_end() R6=pkt(r=64) R10=fp0")
118 int check_assert_generic(struct __sk_buff *ctx)
119 {
120 u8 *data_end = (void *)(long)ctx->data_end;
121 u8 *data = (void *)(long)ctx->data;
122
123 bpf_assert(data + 64 <= data_end);
124 return data[128];
125 }
126
127 SEC("?fentry/bpf_check")
128 __failure __msg("At program exit the register R1 has smin=64 smax=64")
129 int check_assert_with_return(void *ctx)
130 {
131 bpf_assert_with(!ctx, 64);
132 return 0;
133 }
134
135 char _license[] SEC("license") = "GPL";
136
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.