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{
"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",
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"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 tried to add from different maps, paths, or prohibited types",
.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 = "R1 tried to add from different maps, paths, or prohibited types",
.result = ACCEPT,
},
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