0001 {
0002 "bpf_map_ptr: read with negative offset rejected",
0003 .insns = {
0004 BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
0005 BPF_LD_MAP_FD(BPF_REG_1, 0),
0006 BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, -8),
0007 BPF_MOV64_IMM(BPF_REG_0, 1),
0008 BPF_EXIT_INSN(),
0009 },
0010 .fixup_map_array_48b = { 1 },
0011 .result_unpriv = REJECT,
0012 .errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
0013 .result = REJECT,
0014 .errstr = "R1 is bpf_array invalid negative access: off=-8",
0015 },
0016 {
0017 "bpf_map_ptr: write rejected",
0018 .insns = {
0019 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
0020 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
0021 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
0022 BPF_LD_MAP_FD(BPF_REG_1, 0),
0023 BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_2, 0),
0024 BPF_MOV64_IMM(BPF_REG_0, 1),
0025 BPF_EXIT_INSN(),
0026 },
0027 .fixup_map_array_48b = { 3 },
0028 .result_unpriv = REJECT,
0029 .errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
0030 .result = REJECT,
0031 .errstr = "only read from bpf_array is supported",
0032 },
0033 {
0034 "bpf_map_ptr: read non-existent field rejected",
0035 .insns = {
0036 BPF_MOV64_IMM(BPF_REG_6, 0),
0037 BPF_LD_MAP_FD(BPF_REG_1, 0),
0038 BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1, 1),
0039 BPF_MOV64_IMM(BPF_REG_0, 1),
0040 BPF_EXIT_INSN(),
0041 },
0042 .fixup_map_array_48b = { 1 },
0043 .result_unpriv = REJECT,
0044 .errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
0045 .result = REJECT,
0046 .errstr = "cannot access ptr member ops with moff 0 in struct bpf_map with off 1 size 4",
0047 .flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
0048 },
0049 {
0050 "bpf_map_ptr: read ops field accepted",
0051 .insns = {
0052 BPF_MOV64_IMM(BPF_REG_6, 0),
0053 BPF_LD_MAP_FD(BPF_REG_1, 0),
0054 BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
0055 BPF_MOV64_IMM(BPF_REG_0, 1),
0056 BPF_EXIT_INSN(),
0057 },
0058 .fixup_map_array_48b = { 1 },
0059 .result_unpriv = REJECT,
0060 .errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
0061 .result = ACCEPT,
0062 .retval = 1,
0063 },
0064 {
0065 "bpf_map_ptr: r = 0, map_ptr = map_ptr + r",
0066 .insns = {
0067 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
0068 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
0069 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
0070 BPF_MOV64_IMM(BPF_REG_0, 0),
0071 BPF_LD_MAP_FD(BPF_REG_1, 0),
0072 BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
0073 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
0074 BPF_MOV64_IMM(BPF_REG_0, 0),
0075 BPF_EXIT_INSN(),
0076 },
0077 .fixup_map_hash_16b = { 4 },
0078 .result_unpriv = REJECT,
0079 .errstr_unpriv = "R1 has pointer with unsupported alu operation",
0080 .result = ACCEPT,
0081 },
0082 {
0083 "bpf_map_ptr: r = 0, r = r + map_ptr",
0084 .insns = {
0085 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
0086 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
0087 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
0088 BPF_MOV64_IMM(BPF_REG_1, 0),
0089 BPF_LD_MAP_FD(BPF_REG_0, 0),
0090 BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
0091 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
0092 BPF_MOV64_IMM(BPF_REG_0, 0),
0093 BPF_EXIT_INSN(),
0094 },
0095 .fixup_map_hash_16b = { 4 },
0096 .result_unpriv = REJECT,
0097 .errstr_unpriv = "R0 has pointer with unsupported alu operation",
0098 .result = ACCEPT,
0099 },
