| { |
| "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 = "only read from bpf_array is supported", |
| }, |
| { |
| "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, |
| }, |
