190 lines
5.2 KiB
C
190 lines
5.2 KiB
C
|
{
|
||
|
|
"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,
|
||
|
|
},
|