| { |
| "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, |
| }, |
