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
| {
| "map element value store of cleared call register",
| .insns = {
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
| BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
| BPF_LD_MAP_FD(BPF_REG_1, 0),
| BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
| BPF_STX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 0),
| BPF_EXIT_INSN(),
| },
| .fixup_map_hash_48b = { 3 },
| .errstr_unpriv = "R1 !read_ok",
| .errstr = "R1 !read_ok",
| .result = REJECT,
| .result_unpriv = REJECT,
| },
| {
| "map element value with unaligned store",
| .insns = {
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
| BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
| BPF_LD_MAP_FD(BPF_REG_1, 0),
| BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 17),
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 3),
| BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 42),
| BPF_ST_MEM(BPF_DW, BPF_REG_0, 2, 43),
| BPF_ST_MEM(BPF_DW, BPF_REG_0, -2, 44),
| BPF_MOV64_REG(BPF_REG_8, BPF_REG_0),
| BPF_ST_MEM(BPF_DW, BPF_REG_8, 0, 32),
| BPF_ST_MEM(BPF_DW, BPF_REG_8, 2, 33),
| BPF_ST_MEM(BPF_DW, BPF_REG_8, -2, 34),
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_8, 5),
| BPF_ST_MEM(BPF_DW, BPF_REG_8, 0, 22),
| BPF_ST_MEM(BPF_DW, BPF_REG_8, 4, 23),
| BPF_ST_MEM(BPF_DW, BPF_REG_8, -7, 24),
| BPF_MOV64_REG(BPF_REG_7, BPF_REG_8),
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, 3),
| BPF_ST_MEM(BPF_DW, BPF_REG_7, 0, 22),
| BPF_ST_MEM(BPF_DW, BPF_REG_7, 4, 23),
| BPF_ST_MEM(BPF_DW, BPF_REG_7, -4, 24),
| BPF_EXIT_INSN(),
| },
| .fixup_map_hash_48b = { 3 },
| .errstr_unpriv = "R0 leaks addr",
| .result = ACCEPT,
| .result_unpriv = REJECT,
| .flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
| },
| {
| "map element value with unaligned load",
| .insns = {
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
| BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
| BPF_LD_MAP_FD(BPF_REG_1, 0),
| BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 11),
| BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_0, 0),
| BPF_JMP_IMM(BPF_JGE, BPF_REG_1, MAX_ENTRIES, 9),
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 3),
| BPF_LDX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
| BPF_LDX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 2),
| BPF_MOV64_REG(BPF_REG_8, BPF_REG_0),
| BPF_LDX_MEM(BPF_DW, BPF_REG_7, BPF_REG_8, 0),
| BPF_LDX_MEM(BPF_DW, BPF_REG_7, BPF_REG_8, 2),
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 5),
| BPF_LDX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
| BPF_LDX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 4),
| BPF_EXIT_INSN(),
| },
| .fixup_map_hash_48b = { 3 },
| .errstr_unpriv = "R0 leaks addr",
| .result = ACCEPT,
| .result_unpriv = REJECT,
| .flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
| },
| {
| "map element value is preserved across register spilling",
| .insns = {
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
| BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
| BPF_LD_MAP_FD(BPF_REG_1, 0),
| BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 7),
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, offsetof(struct test_val, foo)),
| BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 42),
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -184),
| BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0),
| BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_1, 0),
| BPF_ST_MEM(BPF_DW, BPF_REG_3, 0, 42),
| BPF_EXIT_INSN(),
| },
| .fixup_map_hash_48b = { 3 },
| .errstr_unpriv = "R0 leaks addr",
| .result = ACCEPT,
| .result_unpriv = REJECT,
| .flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
| },
|
|
