| { | |
| "pointer/scalar confusion in state equality check (way 1)", | |
| .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_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_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0), | |
| BPF_JMP_A(1), | |
| BPF_MOV64_REG(BPF_REG_0, BPF_REG_10), | |
| BPF_JMP_A(0), | |
| BPF_EXIT_INSN(), | |
| }, | |
| .fixup_map_hash_8b = { 3 }, | |
| .result = ACCEPT, | |
| .retval = POINTER_VALUE, | |
| .result_unpriv = REJECT, | |
| .errstr_unpriv = "R0 leaks addr as return value" | |
| }, | |
| { | |
| "pointer/scalar confusion in state equality check (way 2)", | |
| .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_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem), | |
| BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2), | |
| BPF_MOV64_REG(BPF_REG_0, BPF_REG_10), | |
| BPF_JMP_A(1), | |
| BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0), | |
| BPF_EXIT_INSN(), | |
| }, | |
| .fixup_map_hash_8b = { 3 }, | |
| .result = ACCEPT, | |
| .retval = POINTER_VALUE, | |
| .result_unpriv = REJECT, | |
| .errstr_unpriv = "R0 leaks addr as return value" | |
| }, | |
| { | |
| "liveness pruning and write screening", | |
| .insns = { | |
| /* Get an unknown value */ | |
| BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, 0), | |
| /* branch conditions teach us nothing about R2 */ | |
| BPF_JMP_IMM(BPF_JGE, BPF_REG_2, 0, 1), | |
| BPF_MOV64_IMM(BPF_REG_0, 0), | |
| BPF_JMP_IMM(BPF_JGE, BPF_REG_2, 0, 1), | |
| BPF_MOV64_IMM(BPF_REG_0, 0), | |
| BPF_EXIT_INSN(), | |
| }, | |
| .errstr = "R0 !read_ok", | |
| .result = REJECT, | |
| .prog_type = BPF_PROG_TYPE_LWT_IN, | |
| }, | |
| { | |
| "varlen_map_value_access pruning", | |
| .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_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem), | |
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 8), | |
| BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0), | |
| BPF_MOV32_IMM(BPF_REG_2, MAX_ENTRIES), | |
| BPF_JMP_REG(BPF_JSGT, BPF_REG_2, BPF_REG_1, 1), | |
| BPF_MOV32_IMM(BPF_REG_1, 0), | |
| BPF_ALU32_IMM(BPF_LSH, BPF_REG_1, 2), | |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1), | |
| BPF_JMP_IMM(BPF_JA, 0, 0, 0), | |
| BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, offsetof(struct test_val, foo)), | |
| BPF_EXIT_INSN(), | |
| }, | |
| .fixup_map_hash_48b = { 3 }, | |
| .errstr_unpriv = "R0 leaks addr", | |
| .errstr = "R0 unbounded memory access", | |
| .result_unpriv = REJECT, | |
| .result = REJECT, | |
| .flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS, | |
| }, | |
| { | |
| "search pruning: all branches should be verified (nop operation)", | |
| .insns = { | |
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), | |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), | |
| BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0), | |
| BPF_LD_MAP_FD(BPF_REG_1, 0), | |
| BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), | |
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 11), | |
| BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_0, 0), | |
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_3, 0xbeef, 2), | |
| BPF_MOV64_IMM(BPF_REG_4, 0), | |
| BPF_JMP_A(1), | |
| BPF_MOV64_IMM(BPF_REG_4, 1), | |
| BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_4, -16), | |
| BPF_EMIT_CALL(BPF_FUNC_ktime_get_ns), | |
| BPF_LDX_MEM(BPF_DW, BPF_REG_5, BPF_REG_10, -16), | |
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_5, 0, 2), | |
| BPF_MOV64_IMM(BPF_REG_6, 0), | |
| BPF_ST_MEM(BPF_DW, BPF_REG_6, 0, 0xdead), | |
| BPF_EXIT_INSN(), | |
| }, | |
| .fixup_map_hash_8b = { 3 }, | |
| .errstr = "R6 invalid mem access 'inv'", | |
| .result = REJECT, | |
| .prog_type = BPF_PROG_TYPE_TRACEPOINT, | |
| }, | |
| { | |
| "search pruning: all branches should be verified (invalid stack access)", | |
| .insns = { | |
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), | |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), | |
| BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0), | |
| BPF_LD_MAP_FD(BPF_REG_1, 0), | |
| BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), | |
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 8), | |
| BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_0, 0), | |
| BPF_MOV64_IMM(BPF_REG_4, 0), | |
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_3, 0xbeef, 2), | |
| BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_4, -16), | |
| BPF_JMP_A(1), | |
| BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_4, -24), | |
| BPF_EMIT_CALL(BPF_FUNC_ktime_get_ns), | |
| BPF_LDX_MEM(BPF_DW, BPF_REG_5, BPF_REG_10, -16), | |
| BPF_EXIT_INSN(), | |
| }, | |
| .fixup_map_hash_8b = { 3 }, | |
| .errstr = "invalid read from stack off -16+0 size 8", | |
| .result = REJECT, | |
| .prog_type = BPF_PROG_TYPE_TRACEPOINT, | |
| }, | |
| { | |
| "allocated_stack", | |
| .insns = { | |
| BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_1), | |
| BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_prandom_u32), | |
| BPF_ALU64_REG(BPF_MOV, BPF_REG_7, BPF_REG_0), | |
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 5), | |
| BPF_MOV64_IMM(BPF_REG_0, 0), | |
| BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, -8), | |
| BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_10, -8), | |
| BPF_STX_MEM(BPF_B, BPF_REG_10, BPF_REG_7, -9), | |
| BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_10, -9), | |
| BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 0), | |
| BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 0), | |
| BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 0), | |
| BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 0), | |
| BPF_EXIT_INSN(), | |
| }, | |
| .result = ACCEPT, | |
| .result_unpriv = ACCEPT, | |
| .insn_processed = 15, | |
| }, |