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linux-stable/tools/testing/selftests/bpf/verifier/jump.c
Daniel Borkmann 9858381253 bpf: add various test cases for backward jumps 
Add a couple of tests to make sure branch(/call) offset adjustments
are correctly performed.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-05-13 01:08:55 +02:00

375 lines
11 KiB
C
Raw Blame History

{
"jump test 1",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_1, -8),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 0),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 1),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 1),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 2, 1),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 3, 1),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 3),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 4, 1),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 5, 1),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -32, 5),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.errstr_unpriv = "R1 pointer comparison",
.result_unpriv = REJECT,
.result = ACCEPT,
},
{
"jump test 2",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 2),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 14),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 2),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 11),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 2, 2),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -32, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 8),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 3, 2),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -40, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 5),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 4, 2),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -48, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 5, 1),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -56, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.errstr_unpriv = "R1 pointer comparison",
.result_unpriv = REJECT,
.result = ACCEPT,
},
{
"jump test 3",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 0),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_JMP_IMM(BPF_JA, 0, 0, 19),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 3),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 0),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
BPF_JMP_IMM(BPF_JA, 0, 0, 15),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 2, 3),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -32, 0),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -32),
BPF_JMP_IMM(BPF_JA, 0, 0, 11),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 3, 3),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -40, 0),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -40),
BPF_JMP_IMM(BPF_JA, 0, 0, 7),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 4, 3),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -48, 0),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -48),
BPF_JMP_IMM(BPF_JA, 0, 0, 3),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 5, 0),
BPF_ST_MEM(BPF_DW, BPF_REG_2, -56, 0),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -56),
BPF_LD_MAP_FD(BPF_REG_1, 0),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_delete_elem),
BPF_EXIT_INSN(),
},
.fixup_map_hash_8b = { 24 },
.errstr_unpriv = "R1 pointer comparison",
.result_unpriv = REJECT,
.result = ACCEPT,
.retval = -ENOENT,
},
{
"jump test 4",
.insns = {
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.errstr_unpriv = "R1 pointer comparison",
.result_unpriv = REJECT,
.result = ACCEPT,
},
{
"jump test 5",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_MOV64_REG(BPF_REG_3, BPF_REG_2),
BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 0, 2),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_3, -8),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_2, -8),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 0, 2),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_3, -8),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_2, -8),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 0, 2),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_3, -8),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_2, -8),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 0, 2),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_3, -8),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_2, -8),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 0, 2),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_3, -8),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_2, -8),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.errstr_unpriv = "R1 pointer comparison",
.result_unpriv = REJECT,
.result = ACCEPT,
},
{
"jump test 6",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_MOV64_IMM(BPF_REG_1, 2),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_MOV64_IMM(BPF_REG_0, 2),
BPF_EXIT_INSN(),
BPF_JMP_REG(BPF_JNE, BPF_REG_0, BPF_REG_1, 16),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, -20),
},
.result = ACCEPT,
.retval = 2,
},
{
"jump test 7",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_MOV64_IMM(BPF_REG_0, 3),
BPF_EXIT_INSN(),
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 2, 16),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_JMP_IMM(BPF_JA, 0, 0, -20),
},
.result = ACCEPT,
.retval = 3,
},
{
"jump test 8",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_MOV64_IMM(BPF_REG_1, 2),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_MOV64_IMM(BPF_REG_0, 3),
BPF_EXIT_INSN(),
BPF_JMP_REG(BPF_JNE, BPF_REG_0, BPF_REG_1, 16),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_JMP_IMM(BPF_JA, 0, 0, -20),
},
.result = ACCEPT,
.retval = 3,
},
{
"jump/call test 9",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_MOV64_IMM(BPF_REG_0, 3),
BPF_EXIT_INSN(),
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 2, 16),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -20),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = REJECT,
.errstr = "jump out of range from insn 1 to 4",
},
{
"jump/call test 10",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
BPF_MOV64_IMM(BPF_REG_0, 3),
BPF_EXIT_INSN(),
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 2, 16),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -20),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = REJECT,
.errstr = "last insn is not an exit or jmp",
},
{
"jump/call test 11",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 4),
BPF_MOV64_IMM(BPF_REG_0, 3),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 3),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 2, 26),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -31),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = ACCEPT,
.retval = 3,
},
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