690 lines
16 KiB
C
690 lines
16 KiB
C
/*
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* Testsuite for eBPF verifier
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*
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* Copyright (c) 2014 PLUMgrid, http://plumgrid.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <linux/bpf.h>
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#include <errno.h>
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#include <linux/unistd.h>
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#include <string.h>
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#include <linux/filter.h>
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#include "libbpf.h"
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#define MAX_INSNS 512
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
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struct bpf_test {
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const char *descr;
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struct bpf_insn insns[MAX_INSNS];
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int fixup[32];
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const char *errstr;
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enum {
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ACCEPT,
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REJECT
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} result;
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};
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static struct bpf_test tests[] = {
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{
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"add+sub+mul",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_1, 1),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 2),
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BPF_MOV64_IMM(BPF_REG_2, 3),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_1, BPF_REG_2),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -1),
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BPF_ALU64_IMM(BPF_MUL, BPF_REG_1, 3),
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BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
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BPF_EXIT_INSN(),
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},
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.result = ACCEPT,
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},
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{
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"unreachable",
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.insns = {
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BPF_EXIT_INSN(),
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BPF_EXIT_INSN(),
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},
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.errstr = "unreachable",
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.result = REJECT,
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},
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{
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"unreachable2",
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.insns = {
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BPF_JMP_IMM(BPF_JA, 0, 0, 1),
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BPF_JMP_IMM(BPF_JA, 0, 0, 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "unreachable",
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.result = REJECT,
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},
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{
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"out of range jump",
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.insns = {
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BPF_JMP_IMM(BPF_JA, 0, 0, 1),
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BPF_EXIT_INSN(),
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},
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.errstr = "jump out of range",
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.result = REJECT,
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},
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{
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"out of range jump2",
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.insns = {
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BPF_JMP_IMM(BPF_JA, 0, 0, -2),
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BPF_EXIT_INSN(),
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},
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.errstr = "jump out of range",
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.result = REJECT,
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},
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{
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"test1 ld_imm64",
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.insns = {
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
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BPF_LD_IMM64(BPF_REG_0, 0),
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BPF_LD_IMM64(BPF_REG_0, 0),
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BPF_LD_IMM64(BPF_REG_0, 1),
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BPF_LD_IMM64(BPF_REG_0, 1),
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BPF_MOV64_IMM(BPF_REG_0, 2),
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BPF_EXIT_INSN(),
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},
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.errstr = "invalid BPF_LD_IMM insn",
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.result = REJECT,
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},
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{
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"test2 ld_imm64",
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.insns = {
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
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BPF_LD_IMM64(BPF_REG_0, 0),
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BPF_LD_IMM64(BPF_REG_0, 0),
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BPF_LD_IMM64(BPF_REG_0, 1),
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BPF_LD_IMM64(BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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},
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.errstr = "invalid BPF_LD_IMM insn",
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.result = REJECT,
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},
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{
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"test3 ld_imm64",
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.insns = {
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
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BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, 0, 0, 0, 0),
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BPF_LD_IMM64(BPF_REG_0, 0),
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BPF_LD_IMM64(BPF_REG_0, 0),
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BPF_LD_IMM64(BPF_REG_0, 1),
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BPF_LD_IMM64(BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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},
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.errstr = "invalid bpf_ld_imm64 insn",
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.result = REJECT,
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},
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{
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"test4 ld_imm64",
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.insns = {
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BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, 0, 0, 0, 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "invalid bpf_ld_imm64 insn",
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.result = REJECT,
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},
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{
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"test5 ld_imm64",
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.insns = {
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BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, 0, 0, 0, 0),
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},
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.errstr = "invalid bpf_ld_imm64 insn",
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.result = REJECT,
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},
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{
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"no bpf_exit",
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.insns = {
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BPF_ALU64_REG(BPF_MOV, BPF_REG_0, BPF_REG_2),
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},
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.errstr = "jump out of range",
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.result = REJECT,
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},
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{
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"loop (back-edge)",
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.insns = {
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BPF_JMP_IMM(BPF_JA, 0, 0, -1),
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BPF_EXIT_INSN(),
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},
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.errstr = "back-edge",
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.result = REJECT,
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},
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{
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"loop2 (back-edge)",
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.insns = {
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
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BPF_MOV64_REG(BPF_REG_3, BPF_REG_0),
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BPF_JMP_IMM(BPF_JA, 0, 0, -4),
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BPF_EXIT_INSN(),
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},
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.errstr = "back-edge",
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.result = REJECT,
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},
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{
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"conditional loop",
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.insns = {
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
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BPF_MOV64_REG(BPF_REG_3, BPF_REG_0),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, -3),
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BPF_EXIT_INSN(),
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},
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.errstr = "back-edge",
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.result = REJECT,
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},
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{
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"read uninitialized register",
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.insns = {
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BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
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BPF_EXIT_INSN(),
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},
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.errstr = "R2 !read_ok",
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.result = REJECT,
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},
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{
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"read invalid register",
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.insns = {
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BPF_MOV64_REG(BPF_REG_0, -1),
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BPF_EXIT_INSN(),
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},
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.errstr = "R15 is invalid",
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.result = REJECT,
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},
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{
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"program doesn't init R0 before exit",
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.insns = {
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BPF_ALU64_REG(BPF_MOV, BPF_REG_2, BPF_REG_1),
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BPF_EXIT_INSN(),
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},
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.errstr = "R0 !read_ok",
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.result = REJECT,
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},
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{
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"program doesn't init R0 before exit in all branches",
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.insns = {
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BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 0, 2),
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BPF_MOV64_IMM(BPF_REG_0, 1),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 2),
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BPF_EXIT_INSN(),
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},
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.errstr = "R0 !read_ok",
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.result = REJECT,
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},
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{
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"stack out of bounds",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, 8, 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "invalid stack",
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.result = REJECT,
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},
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{
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"invalid call insn1",
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.insns = {
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BPF_RAW_INSN(BPF_JMP | BPF_CALL | BPF_X, 0, 0, 0, 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "BPF_CALL uses reserved",
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.result = REJECT,
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},
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{
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"invalid call insn2",
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.insns = {
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 1, 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "BPF_CALL uses reserved",
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.result = REJECT,
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},
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{
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"invalid function call",
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.insns = {
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, 1234567),
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BPF_EXIT_INSN(),
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},
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.errstr = "invalid func 1234567",
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.result = REJECT,
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},
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{
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"uninitialized stack1",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_unspec),
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BPF_EXIT_INSN(),
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},
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.fixup = {2},
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.errstr = "invalid indirect read from stack",
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.result = REJECT,
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},
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{
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"uninitialized stack2",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, -8),
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BPF_EXIT_INSN(),
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},
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.errstr = "invalid read from stack",
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.result = REJECT,
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},
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{
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"check valid spill/fill",
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.insns = {
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/* spill R1(ctx) into stack */
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BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
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/* fill it back into R2 */
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BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_10, -8),
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/* should be able to access R0 = *(R2 + 8) */
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, 8),
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BPF_EXIT_INSN(),
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},
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.result = ACCEPT,
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},
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{
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"check corrupted spill/fill",
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.insns = {
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/* spill R1(ctx) into stack */
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BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
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/* mess up with R1 pointer on stack */
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BPF_ST_MEM(BPF_B, BPF_REG_10, -7, 0x23),
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/* fill back into R0 should fail */
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
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BPF_EXIT_INSN(),
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},
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.errstr = "corrupted spill",
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.result = REJECT,
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},
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{
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"invalid src register in STX",
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.insns = {
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BPF_STX_MEM(BPF_B, BPF_REG_10, -1, -1),
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BPF_EXIT_INSN(),
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},
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.errstr = "R15 is invalid",
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.result = REJECT,
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},
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{
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"invalid dst register in STX",
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.insns = {
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BPF_STX_MEM(BPF_B, 14, BPF_REG_10, -1),
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BPF_EXIT_INSN(),
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},
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.errstr = "R14 is invalid",
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.result = REJECT,
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},
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{
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"invalid dst register in ST",
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.insns = {
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BPF_ST_MEM(BPF_B, 14, -1, -1),
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BPF_EXIT_INSN(),
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},
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.errstr = "R14 is invalid",
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.result = REJECT,
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},
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{
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"invalid src register in LDX",
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.insns = {
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BPF_LDX_MEM(BPF_B, BPF_REG_0, 12, 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "R12 is invalid",
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.result = REJECT,
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},
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{
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"invalid dst register in LDX",
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.insns = {
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BPF_LDX_MEM(BPF_B, 11, BPF_REG_1, 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "R11 is invalid",
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.result = REJECT,
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},
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{
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"junk insn",
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.insns = {
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BPF_RAW_INSN(0, 0, 0, 0, 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "invalid BPF_LD_IMM",
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.result = REJECT,
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},
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{
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"junk insn2",
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.insns = {
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BPF_RAW_INSN(1, 0, 0, 0, 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "BPF_LDX uses reserved fields",
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.result = REJECT,
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},
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{
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"junk insn3",
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.insns = {
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BPF_RAW_INSN(-1, 0, 0, 0, 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "invalid BPF_ALU opcode f0",
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.result = REJECT,
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},
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{
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"junk insn4",
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.insns = {
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BPF_RAW_INSN(-1, -1, -1, -1, -1),
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BPF_EXIT_INSN(),
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},
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.errstr = "invalid BPF_ALU opcode f0",
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.result = REJECT,
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},
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{
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"junk insn5",
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.insns = {
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BPF_RAW_INSN(0x7f, -1, -1, -1, -1),
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BPF_EXIT_INSN(),
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},
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.errstr = "BPF_ALU uses reserved fields",
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.result = REJECT,
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},
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{
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"misaligned read from stack",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, -4),
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BPF_EXIT_INSN(),
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},
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.errstr = "misaligned access",
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.result = REJECT,
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},
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{
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"invalid map_fd for function call",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
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BPF_ALU64_REG(BPF_MOV, BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_unspec),
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BPF_EXIT_INSN(),
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},
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.errstr = "fd 0 is not pointing to valid bpf_map",
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.result = REJECT,
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},
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{
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"don't check return value before access",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_unspec),
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BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
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BPF_EXIT_INSN(),
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},
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.fixup = {3},
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.errstr = "R0 invalid mem access 'map_value_or_null'",
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.result = REJECT,
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},
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{
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"access memory with incorrect alignment",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_unspec),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
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BPF_ST_MEM(BPF_DW, BPF_REG_0, 4, 0),
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BPF_EXIT_INSN(),
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},
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.fixup = {3},
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.errstr = "misaligned access",
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.result = REJECT,
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},
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{
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"sometimes access memory with incorrect alignment",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_unspec),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
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BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
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BPF_EXIT_INSN(),
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BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 1),
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BPF_EXIT_INSN(),
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},
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.fixup = {3},
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.errstr = "R0 invalid mem access",
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.result = REJECT,
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},
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{
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"jump test 1",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_1, -8),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 0),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 1),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 1),
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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(),
|
|
},
|
|
.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(),
|
|
},
|
|
.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_unspec),
|
|
BPF_EXIT_INSN(),
|
|
},
|
|
.fixup = {24},
|
|
.result = ACCEPT,
|
|
},
|
|
{
|
|
"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(),
|
|
},
|
|
.result = ACCEPT,
|
|
},
|
|
};
|
|
|
|
static int probe_filter_length(struct bpf_insn *fp)
|
|
{
|
|
int len = 0;
|
|
|
|
for (len = MAX_INSNS - 1; len > 0; --len)
|
|
if (fp[len].code != 0 || fp[len].imm != 0)
|
|
break;
|
|
|
|
return len + 1;
|
|
}
|
|
|
|
static int create_map(void)
|
|
{
|
|
long long key, value = 0;
|
|
int map_fd;
|
|
|
|
map_fd = bpf_create_map(BPF_MAP_TYPE_UNSPEC, sizeof(key), sizeof(value), 1024);
|
|
if (map_fd < 0) {
|
|
printf("failed to create map '%s'\n", strerror(errno));
|
|
}
|
|
|
|
return map_fd;
|
|
}
|
|
|
|
static int test(void)
|
|
{
|
|
int prog_fd, i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(tests); i++) {
|
|
struct bpf_insn *prog = tests[i].insns;
|
|
int prog_len = probe_filter_length(prog);
|
|
int *fixup = tests[i].fixup;
|
|
int map_fd = -1;
|
|
|
|
if (*fixup) {
|
|
map_fd = create_map();
|
|
|
|
do {
|
|
prog[*fixup].imm = map_fd;
|
|
fixup++;
|
|
} while (*fixup);
|
|
}
|
|
printf("#%d %s ", i, tests[i].descr);
|
|
|
|
prog_fd = bpf_prog_load(BPF_PROG_TYPE_UNSPEC, prog,
|
|
prog_len * sizeof(struct bpf_insn),
|
|
"GPL");
|
|
|
|
if (tests[i].result == ACCEPT) {
|
|
if (prog_fd < 0) {
|
|
printf("FAIL\nfailed to load prog '%s'\n",
|
|
strerror(errno));
|
|
printf("%s", bpf_log_buf);
|
|
goto fail;
|
|
}
|
|
} else {
|
|
if (prog_fd >= 0) {
|
|
printf("FAIL\nunexpected success to load\n");
|
|
printf("%s", bpf_log_buf);
|
|
goto fail;
|
|
}
|
|
if (strstr(bpf_log_buf, tests[i].errstr) == 0) {
|
|
printf("FAIL\nunexpected error message: %s",
|
|
bpf_log_buf);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
printf("OK\n");
|
|
fail:
|
|
if (map_fd >= 0)
|
|
close(map_fd);
|
|
close(prog_fd);
|
|
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
return test();
|
|
}
|