How to use writeCopyout method of prog Package

Best Syzkaller code snippet using prog.writeCopyout

encodingexec.go

Source:encodingexec.go

...86	for _, arg := range c.Args {87		w.writeArg(arg)88	}89	// Generate copyout instructions that persist interesting return values.90	w.writeCopyout(c)91}92type execContext struct {93	target     *Target94	buf        []byte95	eof        bool96	args       map[Arg]argInfo97	copyoutSeq uint6498	// Per-call state cached here to not pass it through all functions.99	csumMap  map[Arg]CsumInfo100	csumUses map[Arg]struct{}101}102type argInfo struct {103	Addr uint64 // physical addr104	Idx  uint64 // copyout instruction index105	Ret  bool106}107func (w *execContext) writeCopyin(c *Call) {108	ForeachArg(c, func(arg Arg, ctx *ArgCtx) {109		if ctx.Base == nil {110			return111		}112		addr := w.target.PhysicalAddr(ctx.Base) + ctx.Offset113		addr -= arg.Type().UnitOffset()114		if w.willBeUsed(arg) {115			w.args[arg] = argInfo{Addr: addr}116		}117		switch arg.(type) {118		case *GroupArg, *UnionArg:119			return120		}121		typ := arg.Type()122		if arg.Dir() == DirOut || IsPad(typ) || (arg.Size() == 0 && !typ.IsBitfield()) {123			return124		}125		w.write(execInstrCopyin)126		w.write(addr)127		w.writeArg(arg)128	})129}130func (w *execContext) willBeUsed(arg Arg) bool {131	if res, ok := arg.(*ResultArg); ok && len(res.uses) != 0 {132		return true133	}134	_, ok1 := w.csumMap[arg]135	_, ok2 := w.csumUses[arg]136	return ok1 || ok2137}138func (w *execContext) writeChecksums() {139	if len(w.csumMap) == 0 {140		return141	}142	csumArgs := make([]Arg, 0, len(w.csumMap))143	for arg := range w.csumMap {144		csumArgs = append(csumArgs, arg)145	}146	sort.Slice(csumArgs, func(i, j int) bool {147		return w.args[csumArgs[i]].Addr < w.args[csumArgs[j]].Addr148	})149	for i := len(csumArgs) - 1; i >= 0; i-- {150		arg := csumArgs[i]151		info := w.csumMap[arg]152		if _, ok := arg.Type().(*CsumType); !ok {153			panic("csum arg is not csum type")154		}155		w.write(execInstrCopyin)156		w.write(w.args[arg].Addr)157		w.write(execArgCsum)158		w.write(arg.Size())159		switch info.Kind {160		case CsumInet:161			w.write(ExecArgCsumInet)162			w.write(uint64(len(info.Chunks)))163			for _, chunk := range info.Chunks {164				switch chunk.Kind {165				case CsumChunkArg:166					w.write(ExecArgCsumChunkData)167					w.write(w.args[chunk.Arg].Addr)168					w.write(chunk.Arg.Size())169				case CsumChunkConst:170					w.write(ExecArgCsumChunkConst)171					w.write(chunk.Value)172					w.write(chunk.Size)173				default:174					panic(fmt.Sprintf("csum chunk has unknown kind %v", chunk.Kind))175				}176			}177		default:178			panic(fmt.Sprintf("csum arg has unknown kind %v", info.Kind))179		}180	}181}182func (w *execContext) writeCopyout(c *Call) {183	ForeachArg(c, func(arg Arg, _ *ArgCtx) {184		if res, ok := arg.(*ResultArg); ok && len(res.uses) != 0 {185			// Create a separate copyout instruction that has own Idx.186			info := w.args[arg]187			if info.Ret {188				return // Idx is already assigned above.189			}190			info.Idx = w.copyoutSeq191			w.copyoutSeq++192			w.args[arg] = info193			w.write(execInstrCopyout)194			w.write(info.Idx)195			w.write(info.Addr)196			w.write(arg.Size())...

writeCopyout

Using AI Code Generation

1import (2func main() {3	args := []string{"ls", "-l", "-h"}4	env := []string{"PATH=/bin"}5	procAttr := syscall.ProcAttr{6		Files: []uintptr{7		},8	}9	pid, err := syscall.ForkExec(prog, args, &procAttr)10	if err != nil {11		fmt.Println("Error in ForkExec:", err)12		os.Exit(1)13	}14	state, err := syscall.Wait4(pid, nil, 0, nil)15	if err != nil {16		fmt.Println("Error in Wait4:", err)17		os.Exit(1)18	}19	fmt.Println("Process state:", state)20}

writeCopyout

Using AI Code Generation

1import (2func main() {3	cmd := exec.Command("ls", "-l")4	cmd.SysProcAttr = &syscall.SysProcAttr{Cloneflags: syscall.CLONE_NEWNS}5	if err := cmd.Run(); err != nil {6		log.Fatal(err)7	}8	fmt.Printf("%v", cmd.Process.Pid)9}10import (11func main() {12	cmd := exec.Command("sh")13	cmd.SysProcAttr = &syscall.SysProcAttr{Cloneflags: syscall.CLONE_NEWNS}14	if err := cmd.Run(); err != nil {15		log.Fatal(err)16	}17	fmt.Printf("%v", cmd.Process.Pid)18}19import (20func main() {21	cmd := exec.Command("sh")22	cmd.SysProcAttr = &syscall.SysProcAttr{Cloneflags: syscall.CLONE_NEWNS | syscall.CLONE_NEWPID | syscall.CLONE_NEWUTS | syscall.CLONE_NEWIPC | syscall.CLONE_NEWNET}23	if err := cmd.Run(); err != nil {24		log.Fatal(err)25	}26	fmt.Printf("%v", cmd.Process.Pid)27}

writeCopyout

Using AI Code Generation

1import (2func main() {3	prog := syscall.Prog{}4	prog.Init("copyout")5	m := syscall.Map{}6	a := syscall.Array{}7	p := syscall.Prog{}8	m1 := syscall.Map{}9	a1 := syscall.Array{}10	p1 := syscall.Prog{}11	m2 := syscall.Map{}12	a2 := syscall.Array{}13	p2 := syscall.Prog{}14	m3 := syscall.Map{}15	a3 := syscall.Array{}16	p3 := syscall.Prog{}17	m4 := syscall.Map{}18	a4 := syscall.Array{}19	p4 := syscall.Prog{}20	m5 := syscall.Map{}21	a5 := syscall.Array{}22	p5 := syscall.Prog{}23	m6 := syscall.Map{}24	a6 := syscall.Array{}25	p6 := syscall.Prog{}26	m7 := syscall.Map{}27	a7 := syscall.Array{}28	p7 := syscall.Prog{}29	m8 := syscall.Map{}30	a8 := syscall.Array{}31	p8 := syscall.Prog{}32	m9 := syscall.Map{}33	a9 := syscall.Array{}34	p9 := syscall.Prog{}35	m10 := syscall.Map{}36	a10 := syscall.Array{}37	p10 := syscall.Prog{}38	m11 := syscall.Map{}

writeCopyout

Using AI Code Generation

1import (2func main() {3	var (4	defer debug.TimeMe(time.Now())5	if len(os.Args) != 3 {6		fmt.Println("Usage: " + os.Args[0] + " <file_to_copy> <destination_path>")7		os.Exit(1)8	}9	p := prog.NewProg()10	p.Start()11	err = p.WriteCopyout(os.Args[1], os.Args[2])12	if err != nil {13		fmt.Println(txt.Red("Error while copying file: " + err.Error()))14		os.Exit(1)15	}16	p.Stop()17	fmt.Println(p)18}

writeCopyout

Using AI Code Generation

1import (2func main() {3	fmt.Println("Enter 4 integers: ")4	for i := 0; i < 4; i++ {5		fmt.Scanf("%d", &a[i])6	}7	prog := syscall.Prog{}8	prog.Init("writeCopyout")9	prog.AddParam(0, syscall.PROG_INTEGER, syscall.PROG_IN)10	prog.AddParam(1, syscall.PROG_INTEGER, syscall.PROG_IN)11	prog.AddParam(2, syscall.PROG_INTEGER, syscall.PROG_IN)12	prog.AddParam(3, syscall.PROG_INTEGER, syscall.PROG_IN)13	prog.AddParam(4, syscall.PROG_INTEGER, syscall.PROG_OUT)14	prog.AddParam(5, syscall.PROG_INTEGER, syscall.PROG_OUT)15	prog.AddParam(6, syscall.PROG_INTEGER, syscall.PROG_OUT)16	prog.AddParam(7, syscall.PROG_INTEGER, syscall.PROG_OUT)17	prog.AddParam(8, syscall.PROG_INTEGER, syscall.PROG_OUT)18	prog.AddParam(9, syscall.PROG_INTEGER, syscall.PROG_OUT)19	prog.AddParam(10, syscall.PROG_INTEGER, syscall.PROG_OUT)20	prog.AddParam(11, syscall.PROG_INTEGER, syscall.PROG_OUT)21	prog.AddParam(12, syscall.PROG_INTEGER, syscall.PROG_OUT)22	prog.AddParam(13, syscall.PROG_INTEGER, syscall.PROG_OUT)23	prog.AddParam(14, syscall.PROG_INTEGER, syscall.PROG_OUT)24	prog.AddParam(15, syscall.PROG_INTEGER, syscall.PROG_OUT)25	prog.AddParam(16, syscall.PROG_INTEGER, syscall.PROG_OUT)26	prog.AddParam(17, syscall.PROG_INTEGER, syscall.PROG_OUT)27	prog.AddParam(18, syscall.PROG_INTEGER, syscall.PROG_OUT)28	prog.AddParam(19, syscall.PROG_INTEGER, syscall.PROG_OUT)29	prog.AddParam(20, syscall.PROG_INTEGER, syscall.PROG_OUT)30	prog.AddParam(21, syscall.PROG_INTEGER, syscall.PROG_OUT)31	prog.AddParam(22, syscall.PROG_INTEGER, syscall.PROG_OUT)32	prog.AddParam(23, syscall.PROG_INTEGER, syscall.PROG_OUT)33	prog.AddParam(24, syscall.PROG

writeCopyout

Using AI Code Generation

1import (2var (3func main() {4	prog := NewProg(program)5	prog.WriteCopyout("hello world")6	prog.Execute()7	prog1 := NewProg(program1)8	prog1.ReadCopyin("hello world")9	prog1.Execute()10	prog2 := NewProg(program2)11	prog2.Execute()12	prog3 := NewProg(program3)13	prog3.Execute()14	prog4 := NewProg(program4)15	prog4.Execute()16}17type Prog struct {18}19func NewProg(program string) *Prog {20	return &Prog{program}21}22func (p *Prog) WriteCopyout(s string) {23	args = append(args, prog)24	args = append(args, s)25	argv := make([]uintptr, len(args)+1)26	for i, arg := range args {27		argv[i] = uintptr(unsafe.Pointer(syscall.StringBytePtr(arg)))28	}29	envv := []uintptr{0}30	_, _, err := syscall.Syscall(syscall.SYS_EXECVE, uintptr(unsafe.Pointer(syscall.StringBytePtr(prog))), uintptr(unsafe.Pointer(&argv[0])), uintptr(unsafe.Pointer(&envv[0])))31	if err != 0 {32		fmt.Println("error")33	}34}35func (p *Prog) ReadCopyin(s string) {36	args = append(args, prog)

writeCopyout

Using AI Code Generation

1import (2func main() {3	p := new(prog)4	p.writeCopyout("hello world", "new.txt")5	content, err := ioutil.ReadFile("new.txt")6	if err != nil {7		fmt.Println(err)8		os.Exit(1)9	}10	fmt.Println(string(content))11}

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