linuxdebug/tools/testing/selftests/bpf/verifier/helper_packet_access.c

{
	"helper access to packet: test1, valid packet_ptr range",
	.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_JGT, BPF_REG_1, BPF_REG_3, 5),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_MOV64_REG(BPF_REG_3, BPF_REG_2),
	BPF_MOV64_IMM(BPF_REG_4, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_update_elem),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_hash_8b = { 5 },
	.result_unpriv = ACCEPT,
	.result = ACCEPT,
	.prog_type = BPF_PROG_TYPE_XDP,
},
{
	"helper access to packet: test2, unchecked packet_ptr",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_hash_8b = { 1 },
	.result = REJECT,
	.errstr = "invalid access to packet",
	.prog_type = BPF_PROG_TYPE_XDP,
},
{
	"helper access to packet: test3, variable add",
	.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_4, BPF_REG_2),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, 8),
	BPF_JMP_REG(BPF_JGT, BPF_REG_4, BPF_REG_3, 10),
	BPF_LDX_MEM(BPF_B, BPF_REG_5, BPF_REG_2, 0),
	BPF_MOV64_REG(BPF_REG_4, BPF_REG_2),
	BPF_ALU64_REG(BPF_ADD, BPF_REG_4, BPF_REG_5),
	BPF_MOV64_REG(BPF_REG_5, BPF_REG_4),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_5, 8),
	BPF_JMP_REG(BPF_JGT, BPF_REG_5, BPF_REG_3, 4),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_hash_8b = { 11 },
	.result = ACCEPT,
	.prog_type = BPF_PROG_TYPE_XDP,
},
{
	"helper access to packet: test4, packet_ptr with bad range",
	.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_4, BPF_REG_2),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, 4),
	BPF_JMP_REG(BPF_JGT, BPF_REG_4, BPF_REG_3, 2),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_hash_8b = { 7 },
	.result = REJECT,
	.errstr = "invalid access to packet",
	.prog_type = BPF_PROG_TYPE_XDP,
},
{
	"helper access to packet: test5, packet_ptr with too short range",
	.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_ALU64_IMM(BPF_ADD, BPF_REG_2, 1),
	BPF_MOV64_REG(BPF_REG_4, BPF_REG_2),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, 7),
	BPF_JMP_REG(BPF_JGT, BPF_REG_4, BPF_REG_3, 3),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_hash_8b = { 6 },
	.result = REJECT,
	.errstr = "invalid access to packet",
	.prog_type = BPF_PROG_TYPE_XDP,
},
{
	"helper access to packet: test6, cls valid packet_ptr range",
	.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_1, BPF_REG_2),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 8),
	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 5),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_MOV64_REG(BPF_REG_3, BPF_REG_2),
	BPF_MOV64_IMM(BPF_REG_4, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_update_elem),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_hash_8b = { 5 },
	.result = ACCEPT,
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test7, cls unchecked packet_ptr",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
		    offsetof(struct __sk_buff, data)),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_hash_8b = { 1 },
	.result = REJECT,
	.errstr = "invalid access to packet",
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test8, cls variable add",
	.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_4, BPF_REG_2),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, 8),
	BPF_JMP_REG(BPF_JGT, BPF_REG_4, BPF_REG_3, 10),
	BPF_LDX_MEM(BPF_B, BPF_REG_5, BPF_REG_2, 0),
	BPF_MOV64_REG(BPF_REG_4, BPF_REG_2),
	BPF_ALU64_REG(BPF_ADD, BPF_REG_4, BPF_REG_5),
	BPF_MOV64_REG(BPF_REG_5, BPF_REG_4),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_5, 8),
	BPF_JMP_REG(BPF_JGT, BPF_REG_5, BPF_REG_3, 4),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_hash_8b = { 11 },
	.result = ACCEPT,
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test9, cls packet_ptr with bad range",
	.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_4, BPF_REG_2),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, 4),
	BPF_JMP_REG(BPF_JGT, BPF_REG_4, BPF_REG_3, 2),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_hash_8b = { 7 },
	.result = REJECT,
	.errstr = "invalid access to packet",
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test10, cls packet_ptr with too short range",
	.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_ALU64_IMM(BPF_ADD, BPF_REG_2, 1),
	BPF_MOV64_REG(BPF_REG_4, BPF_REG_2),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, 7),
	BPF_JMP_REG(BPF_JGT, BPF_REG_4, BPF_REG_3, 3),
	BPF_LD_MAP_FD(BPF_REG_1, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_hash_8b = { 6 },
	.result = REJECT,
	.errstr = "invalid access to packet",
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test11, cls unsuitable helper 1",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
		    offsetof(struct __sk_buff, data)),
	BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
		    offsetof(struct __sk_buff, data_end)),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, 1),
	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_3, 7),
	BPF_JMP_REG(BPF_JGT, BPF_REG_3, BPF_REG_7, 4),
	BPF_MOV64_IMM(BPF_REG_2, 0),
	BPF_MOV64_IMM(BPF_REG_4, 42),
	BPF_MOV64_IMM(BPF_REG_5, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_store_bytes),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.result = REJECT,
	.errstr = "helper access to the packet",
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test12, cls unsuitable helper 2",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
		    offsetof(struct __sk_buff, data)),
	BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
		    offsetof(struct __sk_buff, data_end)),
	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, 8),
	BPF_JMP_REG(BPF_JGT, BPF_REG_6, BPF_REG_7, 3),
	BPF_MOV64_IMM(BPF_REG_2, 0),
	BPF_MOV64_IMM(BPF_REG_4, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.result = REJECT,
	.errstr = "helper access to the packet",
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test13, cls helper ok",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
		    offsetof(struct __sk_buff, data)),
	BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
		    offsetof(struct __sk_buff, data_end)),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, 1),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 7),
	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_7, 6),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_MOV64_IMM(BPF_REG_2, 4),
	BPF_MOV64_IMM(BPF_REG_3, 0),
	BPF_MOV64_IMM(BPF_REG_4, 0),
	BPF_MOV64_IMM(BPF_REG_5, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_csum_diff),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.result = ACCEPT,
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test14, cls helper ok sub",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
		    offsetof(struct __sk_buff, data)),
	BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
		    offsetof(struct __sk_buff, data_end)),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, 1),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 7),
	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_7, 6),
	BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 4),
	BPF_MOV64_IMM(BPF_REG_2, 4),
	BPF_MOV64_IMM(BPF_REG_3, 0),
	BPF_MOV64_IMM(BPF_REG_4, 0),
	BPF_MOV64_IMM(BPF_REG_5, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_csum_diff),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.result = ACCEPT,
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test15, cls helper fail sub",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
		    offsetof(struct __sk_buff, data)),
	BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
		    offsetof(struct __sk_buff, data_end)),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, 1),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 7),
	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_7, 6),
	BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 12),
	BPF_MOV64_IMM(BPF_REG_2, 4),
	BPF_MOV64_IMM(BPF_REG_3, 0),
	BPF_MOV64_IMM(BPF_REG_4, 0),
	BPF_MOV64_IMM(BPF_REG_5, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_csum_diff),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.result = REJECT,
	.errstr = "invalid access to packet",
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test16, cls helper fail range 1",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
		    offsetof(struct __sk_buff, data)),
	BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
		    offsetof(struct __sk_buff, data_end)),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, 1),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 7),
	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_7, 6),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_MOV64_IMM(BPF_REG_2, 8),
	BPF_MOV64_IMM(BPF_REG_3, 0),
	BPF_MOV64_IMM(BPF_REG_4, 0),
	BPF_MOV64_IMM(BPF_REG_5, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_csum_diff),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.result = REJECT,
	.errstr = "invalid access to packet",
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test17, cls helper fail range 2",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
		    offsetof(struct __sk_buff, data)),
	BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
		    offsetof(struct __sk_buff, data_end)),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, 1),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 7),
	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_7, 6),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_MOV64_IMM(BPF_REG_2, -9),
	BPF_MOV64_IMM(BPF_REG_3, 0),
	BPF_MOV64_IMM(BPF_REG_4, 0),
	BPF_MOV64_IMM(BPF_REG_5, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_csum_diff),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.result = REJECT,
	.errstr = "R2 min value is negative",
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test18, cls helper fail range 3",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
		    offsetof(struct __sk_buff, data)),
	BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
		    offsetof(struct __sk_buff, data_end)),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, 1),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 7),
	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_7, 6),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_MOV64_IMM(BPF_REG_2, ~0),
	BPF_MOV64_IMM(BPF_REG_3, 0),
	BPF_MOV64_IMM(BPF_REG_4, 0),
	BPF_MOV64_IMM(BPF_REG_5, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_csum_diff),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.result = REJECT,
	.errstr = "R2 min value is negative",
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test19, cls helper range zero",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
		    offsetof(struct __sk_buff, data)),
	BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
		    offsetof(struct __sk_buff, data_end)),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, 1),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 7),
	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_7, 6),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_MOV64_IMM(BPF_REG_2, 0),
	BPF_MOV64_IMM(BPF_REG_3, 0),
	BPF_MOV64_IMM(BPF_REG_4, 0),
	BPF_MOV64_IMM(BPF_REG_5, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_csum_diff),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.result = ACCEPT,
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test20, pkt end as input",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
		    offsetof(struct __sk_buff, data)),
	BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
		    offsetof(struct __sk_buff, data_end)),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, 1),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 7),
	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_7, 6),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
	BPF_MOV64_IMM(BPF_REG_2, 4),
	BPF_MOV64_IMM(BPF_REG_3, 0),
	BPF_MOV64_IMM(BPF_REG_4, 0),
	BPF_MOV64_IMM(BPF_REG_5, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_csum_diff),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.result = REJECT,
	.errstr = "R1 type=pkt_end expected=fp",
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
	"helper access to packet: test21, wrong reg",
	.insns = {
	BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
		    offsetof(struct __sk_buff, data)),
	BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
		    offsetof(struct __sk_buff, data_end)),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, 1),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 7),
	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_7, 6),
	BPF_MOV64_IMM(BPF_REG_2, 4),
	BPF_MOV64_IMM(BPF_REG_3, 0),
	BPF_MOV64_IMM(BPF_REG_4, 0),
	BPF_MOV64_IMM(BPF_REG_5, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_csum_diff),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.result = REJECT,
	.errstr = "invalid access to packet",
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},