| { |
| "subtraction bounds (map value) variant 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, 9), |
| BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0), |
| BPF_JMP_IMM(BPF_JGT, BPF_REG_1, 0xff, 7), |
| BPF_LDX_MEM(BPF_B, BPF_REG_3, BPF_REG_0, 1), |
| BPF_JMP_IMM(BPF_JGT, BPF_REG_3, 0xff, 5), |
| BPF_ALU64_REG(BPF_SUB, BPF_REG_1, BPF_REG_3), |
| BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 56), |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1), |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .errstr = "R0 max value is outside of the array range", |
| .result = REJECT, |
| }, |
| { |
| "subtraction bounds (map value) variant 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_JEQ, BPF_REG_0, 0, 8), |
| BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0), |
| BPF_JMP_IMM(BPF_JGT, BPF_REG_1, 0xff, 6), |
| BPF_LDX_MEM(BPF_B, BPF_REG_3, BPF_REG_0, 1), |
| BPF_JMP_IMM(BPF_JGT, BPF_REG_3, 0xff, 4), |
| BPF_ALU64_REG(BPF_SUB, BPF_REG_1, BPF_REG_3), |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1), |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .errstr = "R0 min value is negative, either use unsigned index or do a if (index >=0) check.", |
| .errstr_unpriv = "R1 has unknown scalar with mixed signed bounds", |
| .result = REJECT, |
| }, |
| { |
| "check subtraction on pointers for unpriv", |
| .insns = { |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_LD_MAP_FD(BPF_REG_ARG1, 0), |
| BPF_MOV64_REG(BPF_REG_ARG2, BPF_REG_FP), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_ARG2, -8), |
| BPF_ST_MEM(BPF_DW, BPF_REG_ARG2, 0, 9), |
| BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem), |
| BPF_MOV64_REG(BPF_REG_9, BPF_REG_FP), |
| BPF_ALU64_REG(BPF_SUB, BPF_REG_9, BPF_REG_0), |
| BPF_LD_MAP_FD(BPF_REG_ARG1, 0), |
| BPF_MOV64_REG(BPF_REG_ARG2, BPF_REG_FP), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_ARG2, -8), |
| BPF_ST_MEM(BPF_DW, BPF_REG_ARG2, 0, 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, 1), |
| BPF_EXIT_INSN(), |
| BPF_STX_MEM(BPF_DW, BPF_REG_0, BPF_REG_9, 0), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 1, 9 }, |
| .result = ACCEPT, |
| .result_unpriv = REJECT, |
| .errstr_unpriv = "R9 pointer -= pointer prohibited", |
| }, |
| { |
| "bounds check based on zero-extended MOV", |
| .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, 4), |
| /* r2 = 0x0000'0000'ffff'ffff */ |
| BPF_MOV32_IMM(BPF_REG_2, 0xffffffff), |
| /* r2 = 0 */ |
| BPF_ALU64_IMM(BPF_RSH, BPF_REG_2, 32), |
| /* no-op */ |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2), |
| /* access at offset 0 */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0), |
| /* exit */ |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .result = ACCEPT |
| }, |
| { |
| "bounds check based on sign-extended MOV. test1", |
| .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, 4), |
| /* r2 = 0xffff'ffff'ffff'ffff */ |
| BPF_MOV64_IMM(BPF_REG_2, 0xffffffff), |
| /* r2 = 0xffff'ffff */ |
| BPF_ALU64_IMM(BPF_RSH, BPF_REG_2, 32), |
| /* r0 = <oob pointer> */ |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2), |
| /* access to OOB pointer */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0), |
| /* exit */ |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .errstr = "map_value pointer and 4294967295", |
| .result = REJECT |
| }, |
| { |
| "bounds check based on sign-extended MOV. test2", |
| .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, 4), |
| /* r2 = 0xffff'ffff'ffff'ffff */ |
| BPF_MOV64_IMM(BPF_REG_2, 0xffffffff), |
| /* r2 = 0xfff'ffff */ |
| BPF_ALU64_IMM(BPF_RSH, BPF_REG_2, 36), |
| /* r0 = <oob pointer> */ |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2), |
| /* access to OOB pointer */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0), |
| /* exit */ |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .errstr = "R0 min value is outside of the array range", |
| .result = REJECT |
| }, |
| { |
| "bounds check based on reg_off + var_off + insn_off. test1", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1, |
| offsetof(struct __sk_buff, mark)), |
| 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, 4), |
| BPF_ALU64_IMM(BPF_AND, BPF_REG_6, 1), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, (1 << 29) - 1), |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_6), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, (1 << 29) - 1), |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 3), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 4 }, |
| .errstr = "value_size=8 off=1073741825", |
| .result = REJECT, |
| .prog_type = BPF_PROG_TYPE_SCHED_CLS, |
| }, |
| { |
| "bounds check based on reg_off + var_off + insn_off. test2", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1, |
| offsetof(struct __sk_buff, mark)), |
| 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, 4), |
| BPF_ALU64_IMM(BPF_AND, BPF_REG_6, 1), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, (1 << 30) - 1), |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_6), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, (1 << 29) - 1), |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 3), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 4 }, |
| .errstr = "value 1073741823", |
| .result = REJECT, |
| .prog_type = BPF_PROG_TYPE_SCHED_CLS, |
| }, |
| { |
| "bounds check after truncation of non-boundary-crossing range", |
| .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, 9), |
| /* r1 = [0x00, 0xff] */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0), |
| BPF_MOV64_IMM(BPF_REG_2, 1), |
| /* r2 = 0x10'0000'0000 */ |
| BPF_ALU64_IMM(BPF_LSH, BPF_REG_2, 36), |
| /* r1 = [0x10'0000'0000, 0x10'0000'00ff] */ |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_2), |
| /* r1 = [0x10'7fff'ffff, 0x10'8000'00fe] */ |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0x7fffffff), |
| /* r1 = [0x00, 0xff] */ |
| BPF_ALU32_IMM(BPF_SUB, BPF_REG_1, 0x7fffffff), |
| /* r1 = 0 */ |
| BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8), |
| /* no-op */ |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1), |
| /* access at offset 0 */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0), |
| /* exit */ |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .result = ACCEPT |
| }, |
| { |
| "bounds check after truncation of boundary-crossing range (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, 9), |
| /* r1 = [0x00, 0xff] */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xffffff80 >> 1), |
| /* r1 = [0xffff'ff80, 0x1'0000'007f] */ |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xffffff80 >> 1), |
| /* r1 = [0xffff'ff80, 0xffff'ffff] or |
| * [0x0000'0000, 0x0000'007f] |
| */ |
| BPF_ALU32_IMM(BPF_ADD, BPF_REG_1, 0), |
| BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 0xffffff80 >> 1), |
| /* r1 = [0x00, 0xff] or |
| * [0xffff'ffff'0000'0080, 0xffff'ffff'ffff'ffff] |
| */ |
| BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 0xffffff80 >> 1), |
| /* r1 = 0 or |
| * [0x00ff'ffff'ff00'0000, 0x00ff'ffff'ffff'ffff] |
| */ |
| BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8), |
| /* no-op or OOB pointer computation */ |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1), |
| /* potentially OOB access */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0), |
| /* exit */ |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| /* not actually fully unbounded, but the bound is very high */ |
| .errstr = "R0 unbounded memory access", |
| .result = REJECT |
| }, |
| { |
| "bounds check after truncation of boundary-crossing range (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_JEQ, BPF_REG_0, 0, 9), |
| /* r1 = [0x00, 0xff] */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xffffff80 >> 1), |
| /* r1 = [0xffff'ff80, 0x1'0000'007f] */ |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xffffff80 >> 1), |
| /* r1 = [0xffff'ff80, 0xffff'ffff] or |
| * [0x0000'0000, 0x0000'007f] |
| * difference to previous test: truncation via MOV32 |
| * instead of ALU32. |
| */ |
| BPF_MOV32_REG(BPF_REG_1, BPF_REG_1), |
| BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 0xffffff80 >> 1), |
| /* r1 = [0x00, 0xff] or |
| * [0xffff'ffff'0000'0080, 0xffff'ffff'ffff'ffff] |
| */ |
| BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 0xffffff80 >> 1), |
| /* r1 = 0 or |
| * [0x00ff'ffff'ff00'0000, 0x00ff'ffff'ffff'ffff] |
| */ |
| BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8), |
| /* no-op or OOB pointer computation */ |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1), |
| /* potentially OOB access */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0), |
| /* exit */ |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| /* not actually fully unbounded, but the bound is very high */ |
| .errstr = "R0 unbounded memory access", |
| .result = REJECT |
| }, |
| { |
| "bounds check after wrapping 32-bit addition", |
| .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, 5), |
| /* r1 = 0x7fff'ffff */ |
| BPF_MOV64_IMM(BPF_REG_1, 0x7fffffff), |
| /* r1 = 0xffff'fffe */ |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0x7fffffff), |
| /* r1 = 0 */ |
| BPF_ALU32_IMM(BPF_ADD, BPF_REG_1, 2), |
| /* no-op */ |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1), |
| /* access at offset 0 */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0), |
| /* exit */ |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .result = ACCEPT |
| }, |
| { |
| "bounds check after shift with oversized count operand", |
| .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, 6), |
| BPF_MOV64_IMM(BPF_REG_2, 32), |
| BPF_MOV64_IMM(BPF_REG_1, 1), |
| /* r1 = (u32)1 << (u32)32 = ? */ |
| BPF_ALU32_REG(BPF_LSH, BPF_REG_1, BPF_REG_2), |
| /* r1 = [0x0000, 0xffff] */ |
| BPF_ALU64_IMM(BPF_AND, BPF_REG_1, 0xffff), |
| /* computes unknown pointer, potentially OOB */ |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1), |
| /* potentially OOB access */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0), |
| /* exit */ |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .errstr = "R0 max value is outside of the array range", |
| .result = REJECT |
| }, |
| { |
| "bounds check after right shift of maybe-negative number", |
| .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, 6), |
| /* r1 = [0x00, 0xff] */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0), |
| /* r1 = [-0x01, 0xfe] */ |
| BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 1), |
| /* r1 = 0 or 0xff'ffff'ffff'ffff */ |
| BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8), |
| /* r1 = 0 or 0xffff'ffff'ffff */ |
| BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8), |
| /* computes unknown pointer, potentially OOB */ |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1), |
| /* potentially OOB access */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0), |
| /* exit */ |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .errstr = "R0 unbounded memory access", |
| .result = REJECT |
| }, |
| { |
| "bounds check after 32-bit right shift with 64-bit input", |
| .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, 6), |
| /* r1 = 2 */ |
| BPF_MOV64_IMM(BPF_REG_1, 2), |
| /* r1 = 1<<32 */ |
| BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 31), |
| /* r1 = 0 (NOT 2!) */ |
| BPF_ALU32_IMM(BPF_RSH, BPF_REG_1, 31), |
| /* r1 = 0xffff'fffe (NOT 0!) */ |
| BPF_ALU32_IMM(BPF_SUB, BPF_REG_1, 2), |
| /* computes OOB pointer */ |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1), |
| /* OOB access */ |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0), |
| /* exit */ |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .errstr = "R0 invalid mem access", |
| .result = REJECT, |
| }, |
| { |
| "bounds check map access with off+size signed 32bit overflow. test1", |
| .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, 1), |
| BPF_EXIT_INSN(), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 0x7ffffffe), |
| BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0), |
| BPF_JMP_A(0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .errstr = "map_value pointer and 2147483646", |
| .result = REJECT |
| }, |
| { |
| "bounds check map access with off+size signed 32bit overflow. test2", |
| .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, 1), |
| BPF_EXIT_INSN(), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 0x1fffffff), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 0x1fffffff), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 0x1fffffff), |
| BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0), |
| BPF_JMP_A(0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .errstr = "pointer offset 1073741822", |
| .errstr_unpriv = "R0 pointer arithmetic of map value goes out of range", |
| .result = REJECT |
| }, |
| { |
| "bounds check map access with off+size signed 32bit overflow. test3", |
| .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, 1), |
| BPF_EXIT_INSN(), |
| BPF_ALU64_IMM(BPF_SUB, BPF_REG_0, 0x1fffffff), |
| BPF_ALU64_IMM(BPF_SUB, BPF_REG_0, 0x1fffffff), |
| BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 2), |
| BPF_JMP_A(0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .errstr = "pointer offset -1073741822", |
| .errstr_unpriv = "R0 pointer arithmetic of map value goes out of range", |
| .result = REJECT |
| }, |
| { |
| "bounds check map access with off+size signed 32bit overflow. test4", |
| .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, 1), |
| BPF_EXIT_INSN(), |
| BPF_MOV64_IMM(BPF_REG_1, 1000000), |
| BPF_ALU64_IMM(BPF_MUL, BPF_REG_1, 1000000), |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1), |
| BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 2), |
| BPF_JMP_A(0), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .errstr = "map_value pointer and 1000000000000", |
| .result = REJECT |
| }, |
