Exemplo n.º 1
0
func (mgr *Manager) saveRepro(crash *Crash, res *repro.Result) {
	sig := hash.Hash([]byte(crash.desc))
	dir := filepath.Join(mgr.crashdir, sig.String())
	if res == nil {
		for i := 0; i < maxReproAttempts; i++ {
			name := filepath.Join(dir, fmt.Sprintf("repro%v", i))
			if _, err := os.Stat(name); err != nil {
				ioutil.WriteFile(name, nil, 0660)
				break
			}
		}
		return
	}
	opts := fmt.Sprintf("# %+v\n", res.Opts)
	prog := res.Prog.Serialize()
	ioutil.WriteFile(filepath.Join(dir, "repro.prog"), append([]byte(opts), prog...), 0660)
	if len(mgr.cfg.Tag) > 0 {
		ioutil.WriteFile(filepath.Join(dir, "repro.tag"), []byte(mgr.cfg.Tag), 0660)
	}
	if len(crash.text) > 0 {
		ioutil.WriteFile(filepath.Join(dir, "repro.report"), []byte(crash.text), 0660)
	}
	if res.CRepro {
		cprog, err := csource.Write(res.Prog, res.Opts)
		if err == nil {
			formatted, err := csource.Format(cprog)
			if err == nil {
				cprog = formatted
			}
			ioutil.WriteFile(filepath.Join(dir, "repro.cprog"), cprog, 0660)
		} else {
			Logf(0, "failed to write C source: %v", err)
		}
	}
}
Exemplo n.º 2
0
func main() {
	flag.Parse()
	if len(flag.Args()) != 1 {
		fmt.Fprintf(os.Stderr, "usage: prog2c [-threaded [-collide]] prog_file\n")
		os.Exit(1)
	}
	data, err := ioutil.ReadFile(flag.Args()[0])
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed to read prog file: %v\n", err)
		os.Exit(1)
	}
	p, err := prog.Deserialize(data)
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed to deserialize the program: %v\n", err)
		os.Exit(1)
	}
	opts := csource.Options{
		Threaded: *flagThreaded,
		Collide:  *flagCollide,
	}
	src := csource.Write(p, opts)
	if formatted, err := csource.Format(src); err != nil {
		fmt.Fprintf(os.Stderr, "%v\n", err)
	} else {
		src = formatted
	}
	os.Stdout.Write(src)
}
Exemplo n.º 3
0
func main() {
	os.Args = append(append([]string{}, os.Args[0], "-v=10"), os.Args[1:]...)
	flag.Parse()
	cfg, _, err := config.Parse(*flagConfig)
	if err != nil {
		Fatalf("%v", err)
	}
	if *flagCount > 0 {
		cfg.Count = *flagCount
	}
	if cfg.Count > 4 {
		cfg.Count = 4
	}
	if len(flag.Args()) != 1 {
		Fatalf("usage: syz-repro -config=config.file execution.log")
	}
	data, err := ioutil.ReadFile(flag.Args()[0])
	if err != nil {
		Fatalf("failed to open log file: %v", err)
	}
	vmIndexes := make([]int, cfg.Count)
	for i := range vmIndexes {
		vmIndexes[i] = i
	}

	go func() {
		c := make(chan os.Signal, 2)
		signal.Notify(c, syscall.SIGINT)
		<-c
		close(vm.Shutdown)
		Logf(-1, "shutting down...")
		<-c
		Fatalf("terminating")
	}()

	res, err := repro.Run(data, cfg, vmIndexes)
	if err != nil {
		Logf(0, "reproduction failed: %v", err)
	}
	if res == nil {
		return
	}

	fmt.Printf("opts: %+v crepro: %v\n\n", res.Opts, res.CRepro)
	fmt.Printf("%s\n", res.Prog.Serialize())
	if res.CRepro {
		src, err := csource.Write(res.Prog, res.Opts)
		if err != nil {
			Fatalf("failed to generate C repro: %v", err)
		}
		if formatted, err := csource.Format(src); err == nil {
			src = formatted
		}
		fmt.Printf("%s\n", src)
	}
}
Exemplo n.º 4
0
func main() {
	flag.Parse()
	if *flagProg == "" {
		flag.PrintDefaults()
		os.Exit(1)
	}
	data, err := ioutil.ReadFile(*flagProg)
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed to read prog file: %v\n", err)
		os.Exit(1)
	}
	p, err := prog.Deserialize(data)
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed to deserialize the program: %v\n", err)
		os.Exit(1)
	}
	opts := csource.Options{
		Threaded: *flagThreaded,
		Collide:  *flagCollide,
		Repeat:   *flagRepeat,
		Procs:    *flagProcs,
		Sandbox:  *flagSandbox,
		Repro:    false,
	}
	src, err := csource.Write(p, opts)
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed to generate C spurce: %v\n", err)
		os.Exit(1)
	}
	if formatted, err := csource.Format(src); err != nil {
		fmt.Fprintf(os.Stderr, "%v\n", err)
	} else {
		src = formatted
	}
	os.Stdout.Write(src)
}
Exemplo n.º 5
0
func repro(cfg *config.Config, entries []*prog.LogEntry, crashStart int) {
	// Cut programs that were executed after crash.
	for i, ent := range entries {
		if ent.Start > crashStart {
			entries = entries[:i]
			break
		}
	}
	// Extract last program on every proc.
	procs := make(map[int]int)
	for i, ent := range entries {
		procs[ent.Proc] = i
	}
	var indices []int
	for _, idx := range procs {
		indices = append(indices, idx)
	}
	sort.Ints(indices)
	var suspected []*prog.LogEntry
	for i := len(indices) - 1; i >= 0; i-- {
		suspected = append(suspected, entries[indices[i]])
	}
	// Execute the suspected programs.
	Logf(0, "the suspected programs are:")
	for _, ent := range suspected {
		Logf(0, "on proc %v:\n%s\n", ent.Proc, ent.P.Serialize())
	}
	var p *prog.Prog
	multiplier := 1
	for ; p == nil && multiplier <= 100; multiplier *= 10 {
		for _, ent := range suspected {
			if testProg(cfg, ent.P, multiplier, true, true) {
				p = ent.P
				break
			}
		}
	}
	if p == nil {
		Logf(0, "no program crashed")
		return
	}
	Logf(0, "minimizing program")

	p, _ = prog.Minimize(p, -1, func(p1 *prog.Prog, callIndex int) bool {
		return testProg(cfg, p1, multiplier, true, true)
	})

	opts := csource.Options{
		Threaded: true,
		Collide:  true,
	}
	if testProg(cfg, p, multiplier, true, false) {
		opts.Collide = false
		if testProg(cfg, p, multiplier, false, false) {
			opts.Threaded = false
		}
	}

	src := csource.Write(p, opts)
	src, _ = csource.Format(src)
	Logf(0, "C source:\n%s\n", src)
	srcf, err := fileutil.WriteTempFile(src)
	if err != nil {
		Fatalf("%v", err)
	}
	bin, err := csource.Build(srcf)
	if err != nil {
		Fatalf("%v", err)
	}
	defer os.Remove(bin)
	testBin(cfg, bin)
}