| { |
| "invalid direct packet write for LWT_IN", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, |
| offsetof(struct __sk_buff, data)), |
| BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, |
| offsetof(struct __sk_buff, data_end)), |
| BPF_MOV64_REG(BPF_REG_0, BPF_REG_2), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8), |
| BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1), |
| BPF_STX_MEM(BPF_B, BPF_REG_2, BPF_REG_2, 0), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .errstr = "cannot write into packet", |
| .result = REJECT, |
| .prog_type = BPF_PROG_TYPE_LWT_IN, |
| }, |
| { |
| "invalid direct packet write for LWT_OUT", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, |
| offsetof(struct __sk_buff, data)), |
| BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, |
| offsetof(struct __sk_buff, data_end)), |
| BPF_MOV64_REG(BPF_REG_0, BPF_REG_2), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8), |
| BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1), |
| BPF_STX_MEM(BPF_B, BPF_REG_2, BPF_REG_2, 0), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .errstr = "cannot write into packet", |
| .result = REJECT, |
| .prog_type = BPF_PROG_TYPE_LWT_OUT, |
| }, |
| { |
| "direct packet write for LWT_XMIT", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, |
| offsetof(struct __sk_buff, data)), |
| BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, |
| offsetof(struct __sk_buff, data_end)), |
| BPF_MOV64_REG(BPF_REG_0, BPF_REG_2), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8), |
| BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1), |
| BPF_STX_MEM(BPF_B, BPF_REG_2, BPF_REG_2, 0), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .result = ACCEPT, |
| .prog_type = BPF_PROG_TYPE_LWT_XMIT, |
| }, |
| { |
| "direct packet read for LWT_IN", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, |
| offsetof(struct __sk_buff, data)), |
| BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, |
| offsetof(struct __sk_buff, data_end)), |
| BPF_MOV64_REG(BPF_REG_0, BPF_REG_2), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8), |
| BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1), |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_2, 0), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .result = ACCEPT, |
| .prog_type = BPF_PROG_TYPE_LWT_IN, |
| }, |
| { |
| "direct packet read for LWT_OUT", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, |
| offsetof(struct __sk_buff, data)), |
| BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, |
| offsetof(struct __sk_buff, data_end)), |
| BPF_MOV64_REG(BPF_REG_0, BPF_REG_2), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8), |
| BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1), |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_2, 0), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .result = ACCEPT, |
| .prog_type = BPF_PROG_TYPE_LWT_OUT, |
| }, |
| { |
| "direct packet read for LWT_XMIT", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, |
| offsetof(struct __sk_buff, data)), |
| BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, |
| offsetof(struct __sk_buff, data_end)), |
| BPF_MOV64_REG(BPF_REG_0, BPF_REG_2), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8), |
| BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1), |
| BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_2, 0), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .result = ACCEPT, |
| .prog_type = BPF_PROG_TYPE_LWT_XMIT, |
| }, |
| { |
| "overlapping checks for direct packet access", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, |
| offsetof(struct __sk_buff, data)), |
| BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, |
| offsetof(struct __sk_buff, data_end)), |
| BPF_MOV64_REG(BPF_REG_0, BPF_REG_2), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8), |
| BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 4), |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 6), |
| BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 1), |
| BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_2, 6), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .result = ACCEPT, |
| .prog_type = BPF_PROG_TYPE_LWT_XMIT, |
| }, |
| { |
| "make headroom for LWT_XMIT", |
| .insns = { |
| BPF_MOV64_REG(BPF_REG_6, BPF_REG_1), |
| BPF_MOV64_IMM(BPF_REG_2, 34), |
| BPF_MOV64_IMM(BPF_REG_3, 0), |
| BPF_EMIT_CALL(BPF_FUNC_skb_change_head), |
| /* split for s390 to succeed */ |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), |
| BPF_MOV64_IMM(BPF_REG_2, 42), |
| BPF_MOV64_IMM(BPF_REG_3, 0), |
| BPF_EMIT_CALL(BPF_FUNC_skb_change_head), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .result = ACCEPT, |
| .prog_type = BPF_PROG_TYPE_LWT_XMIT, |
| }, |
| { |
| "invalid access of tc_classid for LWT_IN", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1, |
| offsetof(struct __sk_buff, tc_classid)), |
| BPF_EXIT_INSN(), |
| }, |
| .result = REJECT, |
| .errstr = "invalid bpf_context access", |
| }, |
| { |
| "invalid access of tc_classid for LWT_OUT", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1, |
| offsetof(struct __sk_buff, tc_classid)), |
| BPF_EXIT_INSN(), |
| }, |
| .result = REJECT, |
| .errstr = "invalid bpf_context access", |
| }, |
| { |
| "invalid access of tc_classid for LWT_XMIT", |
| .insns = { |
| BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1, |
| offsetof(struct __sk_buff, tc_classid)), |
| BPF_EXIT_INSN(), |
| }, |
| .result = REJECT, |
| .errstr = "invalid bpf_context access", |
| }, |
| { |
| "check skb->tc_classid half load not permitted for lwt prog", |
| .insns = { |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| #if __BYTE_ORDER == __LITTLE_ENDIAN |
| BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1, |
| offsetof(struct __sk_buff, tc_classid)), |
| #else |
| BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1, |
| offsetof(struct __sk_buff, tc_classid) + 2), |
| #endif |
| BPF_EXIT_INSN(), |
| }, |
| .result = REJECT, |
| .errstr = "invalid bpf_context access", |
| .prog_type = BPF_PROG_TYPE_LWT_IN, |
| }, |
