{ "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, },