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
|
{
"calls: two calls returning different map pointers for lookup (hash, array)",
.insns = {
/* main prog */
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 2),
BPF_CALL_REL(11),
BPF_JMP_IMM(BPF_JA, 0, 0, 1),
BPF_CALL_REL(12),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, offsetof(struct test_val, foo)),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
/* subprog 1 */
BPF_LD_MAP_FD(BPF_REG_0, 0),
BPF_EXIT_INSN(),
/* subprog 2 */
BPF_LD_MAP_FD(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.fixup_map_hash_48b = { 13 },
.fixup_map_array_48b = { 16 },
.result = ACCEPT,
.retval = 1,
},
{
"calls: two calls returning different map pointers for lookup (hash, map in map)",
.insns = {
/* main prog */
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 2),
BPF_CALL_REL(11),
BPF_JMP_IMM(BPF_JA, 0, 0, 1),
BPF_CALL_REL(12),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, offsetof(struct test_val, foo)),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
/* subprog 1 */
BPF_LD_MAP_FD(BPF_REG_0, 0),
BPF_EXIT_INSN(),
/* subprog 2 */
BPF_LD_MAP_FD(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.fixup_map_in_map = { 16 },
.fixup_map_array_48b = { 13 },
.result = REJECT,
.errstr = "R0 invalid mem access 'map_ptr'",
},
{
"cond: two branches returning different map pointers for lookup (tail, tail)",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
offsetof(struct __sk_buff, mark)),
BPF_JMP_IMM(BPF_JNE, BPF_REG_6, 0, 3),
BPF_LD_MAP_FD(BPF_REG_2, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_LD_MAP_FD(BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_3, 7),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_tail_call),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.fixup_prog1 = { 5 },
.fixup_prog2 = { 2 },
.result_unpriv = REJECT,
.errstr_unpriv = "tail_call abusing map_ptr",
.result = ACCEPT,
.retval = 42,
},
{
"cond: two branches returning same map pointers for lookup (tail, tail)",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
offsetof(struct __sk_buff, mark)),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_6, 0, 3),
BPF_LD_MAP_FD(BPF_REG_2, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_LD_MAP_FD(BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_3, 7),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_tail_call),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.fixup_prog2 = { 2, 5 },
.result_unpriv = ACCEPT,
.result = ACCEPT,
.retval = 42,
},
|
