| { |
| "xadd/w check unaligned stack", |
| .insns = { |
| BPF_MOV64_IMM(BPF_REG_0, 1), |
| BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_0, -8), |
| BPF_STX_XADD(BPF_W, BPF_REG_10, BPF_REG_0, -7), |
| BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8), |
| BPF_EXIT_INSN(), |
| }, |
| .result = REJECT, |
| .errstr = "misaligned stack access off", |
| .prog_type = BPF_PROG_TYPE_SCHED_CLS, |
| }, |
| { |
| "xadd/w check unaligned map", |
| .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, 1), |
| BPF_STX_XADD(BPF_W, BPF_REG_0, BPF_REG_1, 3), |
| BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_0, 3), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_8b = { 3 }, |
| .result = REJECT, |
| .errstr = "misaligned value access off", |
| .prog_type = BPF_PROG_TYPE_SCHED_CLS, |
| }, |
| { |
| "xadd/w check unaligned pkt", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)), |
| BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, |
| offsetof(struct xdp_md, data_end)), |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 8), |
| BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_3, 2), |
| BPF_MOV64_IMM(BPF_REG_0, 99), |
| BPF_JMP_IMM(BPF_JA, 0, 0, 6), |
| BPF_MOV64_IMM(BPF_REG_0, 1), |
| BPF_ST_MEM(BPF_W, BPF_REG_2, 0, 0), |
| BPF_ST_MEM(BPF_W, BPF_REG_2, 3, 0), |
| BPF_STX_XADD(BPF_W, BPF_REG_2, BPF_REG_0, 1), |
| BPF_STX_XADD(BPF_W, BPF_REG_2, BPF_REG_0, 2), |
| BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_2, 1), |
| BPF_EXIT_INSN(), |
| }, |
| .result = REJECT, |
| .errstr = "BPF_XADD stores into R2 pkt is not allowed", |
| .prog_type = BPF_PROG_TYPE_XDP, |
| .flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS, |
| }, |
| { |
| "xadd/w check whether src/dst got mangled, 1", |
| .insns = { |
| BPF_MOV64_IMM(BPF_REG_0, 1), |
| BPF_MOV64_REG(BPF_REG_6, BPF_REG_0), |
| BPF_MOV64_REG(BPF_REG_7, BPF_REG_10), |
| BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_0, -8), |
| BPF_STX_XADD(BPF_DW, BPF_REG_10, BPF_REG_0, -8), |
| BPF_STX_XADD(BPF_DW, BPF_REG_10, BPF_REG_0, -8), |
| BPF_JMP_REG(BPF_JNE, BPF_REG_6, BPF_REG_0, 3), |
| BPF_JMP_REG(BPF_JNE, BPF_REG_7, BPF_REG_10, 2), |
| BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8), |
| BPF_EXIT_INSN(), |
| BPF_MOV64_IMM(BPF_REG_0, 42), |
| BPF_EXIT_INSN(), |
| }, |
| .result = ACCEPT, |
| .prog_type = BPF_PROG_TYPE_SCHED_CLS, |
| .retval = 3, |
| }, |
| { |
| "xadd/w check whether src/dst got mangled, 2", |
| .insns = { |
| BPF_MOV64_IMM(BPF_REG_0, 1), |
| BPF_MOV64_REG(BPF_REG_6, BPF_REG_0), |
| BPF_MOV64_REG(BPF_REG_7, BPF_REG_10), |
| BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_0, -8), |
| BPF_STX_XADD(BPF_W, BPF_REG_10, BPF_REG_0, -8), |
| BPF_STX_XADD(BPF_W, BPF_REG_10, BPF_REG_0, -8), |
| BPF_JMP_REG(BPF_JNE, BPF_REG_6, BPF_REG_0, 3), |
| BPF_JMP_REG(BPF_JNE, BPF_REG_7, BPF_REG_10, 2), |
| BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_10, -8), |
| BPF_EXIT_INSN(), |
| BPF_MOV64_IMM(BPF_REG_0, 42), |
| BPF_EXIT_INSN(), |
| }, |
| .result = ACCEPT, |
| .prog_type = BPF_PROG_TYPE_SCHED_CLS, |
| .retval = 3, |
| }, |
