summaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/bpf/verifier/map_ptr.c
blob: 2f551cb24cf7cbdfaf58084913db42fe1aacbb2a (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
{
	"bpf_map_ptr: read with negative offset rejected",
	.insns = {
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, -8),
	BPF_MOV64_IMM(BPF_REG_0, 1),
	BPF_EXIT_INSN(),
	},
	.fixup_map_array_48b = { 1 },
	.result_unpriv = REJECT,
	.errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
	.result = REJECT,
	.errstr = "R1 is bpf_array invalid negative access: off=-8",
},
{
	"bpf_map_ptr: write rejected",
	.insns = {
	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_LD_MAP_FD(BPF_REG_1, 0),
	BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_2, 0),
	BPF_MOV64_IMM(BPF_REG_0, 1),
	BPF_EXIT_INSN(),
	},
	.fixup_map_array_48b = { 3 },
	.result_unpriv = REJECT,
	.errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
	.result = REJECT,
	.errstr = "only read from bpf_array is supported",
},
{
	"bpf_map_ptr: read non-existent field rejected",
	.insns = {
	BPF_MOV64_IMM(BPF_REG_6, 0),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1, 1),
	BPF_MOV64_IMM(BPF_REG_0, 1),
	BPF_EXIT_INSN(),
	},
	.fixup_map_array_48b = { 1 },
	.result_unpriv = REJECT,
	.errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
	.result = REJECT,
	.errstr = "cannot access ptr member ops with moff 0 in struct bpf_map with off 1 size 4",
},
{
	"bpf_map_ptr: read ops field accepted",
	.insns = {
	BPF_MOV64_IMM(BPF_REG_6, 0),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
	BPF_MOV64_IMM(BPF_REG_0, 1),
	BPF_EXIT_INSN(),
	},
	.fixup_map_array_48b = { 1 },
	.result_unpriv = REJECT,
	.errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
	.result = ACCEPT,
	.retval = 1,
},
{
	"bpf_map_ptr: r = 0, map_ptr = map_ptr + r",
	.insns = {
	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_MOV64_IMM(BPF_REG_0, 0),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_hash_16b = { 4 },
	.result_unpriv = REJECT,
	.errstr_unpriv = "R1 has pointer with unsupported alu operation",
	.result = ACCEPT,
},
{
	"bpf_map_ptr: r = 0, r = r + map_ptr",
	.insns = {
	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_MOV64_IMM(BPF_REG_1, 0),
	BPF_LD_MAP_FD(BPF_REG_0, 0),
	BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_hash_16b = { 4 },
	.result_unpriv = REJECT,
	.errstr_unpriv = "R0 has pointer with unsupported alu operation",
	.result = ACCEPT,
},