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How to use Create method of gvisor Package

Best Syzkaller code snippet using gvisor.Create

runk.go

Source:runk.go

...74	}75	k := &kernel.Kernel{76		Platform: p,77	}78	// Create memory file.79	mf, err := createMemoryFile()80	if err != nil {81		return errors.Wrap(err, "creating memory file")82	}83	k.SetMemoryFile(mf)84	vdso, err := loader.PrepareVDSO(nil, k)85	if err != nil {86		return errors.Wrap(err, "error creating vdso")87	}88	tk, err := kernel.NewTimekeeper(k, vdso.ParamPage.FileRange())89	if err != nil {90		return errors.Wrap(err, "error creating timekeeper")91	}92	tk.SetClocks(time.NewCalibratedClocks())93	networkStack, err := netStack(k, k, o.Network)94	if err != nil {95		return err96	}97	stack, ok := networkStack.(*hostinet.Stack)98	if ok {99		if err := stack.Configure(); err != nil {100			return err101		}102	}103	creds := auth.NewUserCredentials(104		auth.KUID(0),105		auth.KGID(0),106		nil,107		nil,108		auth.NewRootUserNamespace())109	if err = k.Init(kernel.InitKernelArgs{110		FeatureSet:                  cpuid.HostFeatureSet(),111		Timekeeper:                  tk,112		RootUserNamespace:           creds.UserNamespace,113		NetworkStack:                networkStack,114		ApplicationCores:            uint(runtime.NumCPU()),115		Vdso:                        vdso,116		RootUTSNamespace:            kernel.NewUTSNamespace("sbox", "sbox", creds.UserNamespace),117		RootIPCNamespace:            kernel.NewIPCNamespace(creds.UserNamespace),118		RootAbstractSocketNamespace: kernel.NewAbstractSocketNamespace(),119		PIDNamespace:                kernel.NewRootPIDNamespace(creds.UserNamespace),120	}); err != nil {121		return errors.Wrap(err, "error initializing kernel")122	}123	ls, err := limits.NewLinuxLimitSet()124	if err != nil {125		return err126	}127	// Create the process arguments.128	procArgs := kernel.CreateProcessArgs{129		Argv:                    o.Process.Args,130		Envv:                    []string{},131		WorkingDirectory:        "/", // Defaults to '/' if empty.132		Credentials:             creds,133		Umask:                   0022,134		Limits:                  ls,135		MaxSymlinkTraversals:    linux.MaxSymlinkTraversals,136		UTSNamespace:            k.RootUTSNamespace(),137		IPCNamespace:            k.RootIPCNamespace(),138		AbstractSocketNamespace: k.RootAbstractSocketNamespace(),139		ContainerID:             "sbox",140		PIDNamespace:            k.RootPIDNamespace(),141	}142	ctx := procArgs.NewContext(k)143	fdt, err := createFDTable(ctx, k, ls, o.Process.TTY, []int{0, 1, 2})144	if err != nil {145		return errors.Wrap(err, "error importing fds")146	}147	// CreateProcess takes a reference on fdTable if successful. We148	// won't need ours either way.149	procArgs.FDTable = fdt150	rootProcArgs := procArgs151	rootProcArgs.WorkingDirectory = "/"152	rootProcArgs.Credentials = auth.NewRootCredentials(creds.UserNamespace)153	rootProcArgs.Umask = 0022154	rootProcArgs.MaxSymlinkTraversals = linux.MaxSymlinkTraversals155	rootCtx := rootProcArgs.NewContext(k)156	followLinks := uint(linux.MaxSymlinkTraversals)157	mns, err := createMountNamespace(ctx, rootCtx, o.Mounts, &followLinks)158	if err != nil {159		return errors.Wrap(err, "error creating mounts")160	}161	rootProcArgs.MountNamespace = mns162	_, _, err = k.CreateProcess(rootProcArgs)163	if err != nil {164		return errors.Wrap(err, "failed to create init process")165	}166	tg := k.GlobalInit()167	if o.Process.TTY {168		ttyFile, _ := procArgs.FDTable.Get(0)169		defer ttyFile.DecRef()170		ttyfop := ttyFile.FileOperations.(*host.TTYFileOperations)171		// Set the foreground process group on the TTY to the global172		// init process group, since that is what we are about to173		// start running.174		ttyfop.InitForegroundProcessGroup(tg.ProcessGroup())175	}176	if err := k.Start(); err != nil {177		return err178	}179	k.WaitExited()180	return nil181}182func addSubmountOverlay(ctx context.Context, inode *fs.Inode, submounts []string) (*fs.Inode, error) {183	// There is no real filesystem backing this ramfs tree, so we pass in184	// "nil" here.185	msrc := fs.NewNonCachingMountSource(ctx, nil, fs.MountSourceFlags{})186	mountTree, err := ramfs.MakeDirectoryTree(ctx, msrc, submounts)187	if err != nil {188		return nil, errors.Wrap(err, "error creating mount tree")189	}190	overlayInode, err := fs.NewOverlayRoot(ctx, inode, mountTree, fs.MountSourceFlags{})191	if err != nil {192		return nil, errors.Wrap(err, "failed to make mount overlay")193	}194	return overlayInode, err195}196func createMountNamespace(userCtx context.Context, rootCtx context.Context, mounts []string, maxTraversals *uint) (*fs.MountNamespace, error) {197	rootInode, err := createRootMount(rootCtx, mounts)198	if err != nil {199		return nil, errors.Wrap(err, "failed to create root mount")200	}201	mns, err := fs.NewMountNamespace(userCtx, rootInode)202	if err != nil {203		return nil, errors.Wrap(err, "failed to create root mount namespace")204	}205	root := mns.Root()206	defer root.DecRef()207	proc, ok := fs.FindFilesystem("proc")208	if !ok {209		panic(fmt.Sprintf("could not find filesystem proc"))210	}211	ctx := rootCtx212	inode, err := proc.Mount(ctx, "none", fs.MountSourceFlags{}, "", nil)213	if err != nil {214		return nil, errors.Wrap(err, "failed to create mount with source")215	}216	dirent, err := mns.FindInode(ctx, root, root, "/proc", maxTraversals)217	if err != nil {218		return nil, errors.Wrap(err, "failed to find mount destination")219	}220	defer dirent.DecRef()221	if err := mns.Mount(ctx, dirent, inode); err != nil {222		return nil, errors.Wrap(err, "failed to mount at destination")223	}224	return mns, nil225}226func createRootMount(ctx context.Context, mounts []string) (*fs.Inode, error) {227	// First construct the filesystem from the spec.Root.228	mf := fs.MountSourceFlags{ReadOnly: false}229	var (230		rootInode, prevInode *fs.Inode231		err                  error232	)233	wd, err := os.Getwd()234	if err != nil {235		return nil, err236	}237	host, ok := fs.FindFilesystem("whitelistfs")238	if !ok {239		panic(fmt.Sprintf("could not find filesystem host"))240	}241	for i, m := range mounts {242		if !filepath.IsAbs(m) {243			m = filepath.Join(wd, m)244		}245		rootInode, err = host.Mount(ctx, "", mf, "root="+m, nil)246		if err != nil {247			return nil, errors.Wrap(err, "failed to generate root mount point")248		}249		if i != 0 {250			rootInode, err = fs.NewOverlayRoot(ctx, rootInode, prevInode, fs.MountSourceFlags{})251			if err != nil {252				return nil, errors.Wrap(err, "failed to make mount overlay")253			}254		}255		prevInode = rootInode256	}257	submounts := []string{"/dev", "/sys", "/proc", "/tmp"}258	rootInode, err = addSubmountOverlay(ctx, rootInode, submounts)259	if err != nil {260		return nil, errors.Wrap(err, "error adding submount overlay")261	}262	tmpfs, ok := fs.FindFilesystem("tmpfs")263	if !ok {264		panic(fmt.Sprintf("could not find filesystem tmpfs"))265	}266	upper, err := tmpfs.Mount(ctx, "upper", fs.MountSourceFlags{}, "", nil)267	if err != nil {268		return nil, errors.Wrap(err, "failed to create tmpfs overlay")269	}270	rootInode, err = fs.NewOverlayRoot(ctx, upper, rootInode, fs.MountSourceFlags{})271	if err != nil {272		return nil, errors.Wrap(err, "failed to make mount overlay")273	}274	return rootInode, nil275}276func createFDTable(ctx context.Context, k *kernel.Kernel, l *limits.LimitSet, console bool, stdioFDs []int) (*kernel.FDTable, error) {277	if len(stdioFDs) != 3 {278		return nil, errors.Errorf("stdioFDs should contain exactly 3 FDs (stdin, stdout, and stderr), but %d FDs received", len(stdioFDs))279	}280	fdm := k.NewFDTable()281	defer fdm.DecRef()282	mounter := fs.FileOwnerFromContext(ctx)283	// Maps sandbox FD to host FD.284	fdMap := map[int]int{285		0: stdioFDs[0],286		1: stdioFDs[1],287		2: stdioFDs[2],288	}289	var ttyFile *fs.File290	for appFD, hostFD := range fdMap {291		var appFile *fs.File292		if console && appFD < 3 {293			// Import the file as a host TTY file.294			if ttyFile == nil {295				var err error296				appFile, err = host.ImportFile(ctx, hostFD, mounter, true /* isTTY */)297				if err != nil {298					return nil, err299				}300				defer appFile.DecRef()301				// Remember this in the TTY file, as we will302				// use it for the other stdio FDs.303				ttyFile = appFile304			} else {305				// Re-use the existing TTY file, as all three306				// stdio FDs must point to the same fs.File in307				// order to share TTY state, specifically the308				// foreground process group id.309				appFile = ttyFile310			}311		} else {312			// Import the file as a regular host file.313			var err error314			appFile, err = host.ImportFile(ctx, hostFD, mounter, false /* isTTY */)315			if err != nil {316				return nil, err317			}318			defer appFile.DecRef()319		}320		// Add the file to the FD map.321		if err := fdm.NewFDAt(ctx, int32(appFD), appFile, kernel.FDFlags{}); err != nil {322			return nil, err323		}324	}325	fdm.IncRef()326	return fdm, nil327}328func createMemoryFile() (*pgalloc.MemoryFile, error) {329	const memfileName = "runsc-memory"330	memfd, err := memutil.CreateMemFD(memfileName, 0)331	if err != nil {332		return nil, errors.Wrap(err, "error creating memfd")333	}334	memfile := os.NewFile(uintptr(memfd), memfileName)335	mf, err := pgalloc.NewMemoryFile(memfile, pgalloc.MemoryFileOpts{})336	if err != nil {337		memfile.Close()338		return nil, errors.Wrap(err, "error creating pgalloc.MemoryFile")339	}340	return mf, nil341}...

comm.go

Source:comm.go

...60	}61	var linkID stack.LinkEndpoint62	var channelLinkID = channel.New(1024, uint32(mtu), tcpip.LinkAddress(macAddr))63	linkID = channelLinkID64	if err := _netStack.CreateNIC(nicid, linkID); err != nil {65		return _netStack, nil, errors.New(err.String())66	}67	_netStack.SetRouteTable([]tcpip.Route{68		// IPv469		{70			Destination: header.IPv4EmptySubnet,71			NIC:         nicid,72		},73	})74	//promiscuous mode å¿é¡»75	_netStack.SetPromiscuousMode(nicid, true)76	_netStack.SetSpoofing(nicid, true)77	tcpForwarder := tcp.NewForwarder(_netStack, 0, 512, func(r *tcp.ForwarderRequest) {78		var wq waiter.Queue79		ep, err := r.CreateEndpoint(&wq)80		if err != nil {81			log.Printf("CreateEndpoint" + err.String() + "\r\n")82			r.Complete(true)83			return84		}85		defer ep.Close()86		r.Complete(false)87		if err := setKeepalive(ep); err != nil {88			log.Printf("setKeepalive" + err.Error() + "\r\n")89		}90		conn := gonet.NewTCPConn(&wq, ep)91		defer conn.Close()92		tcpCallback(conn)93	})94	_netStack.SetTransportProtocolHandler(tcp.ProtocolNumber, tcpForwarder.HandlePacket)95	udpForwarder := udp.NewForwarder(_netStack, func(r *udp.ForwarderRequest) {96		var wq waiter.Queue97		ep, err := r.CreateEndpoint(&wq)98		if err != nil {99			log.Printf("r.CreateEndpoint() = %v", err)100			return101		}102		go udpCallback(gonet.NewUDPConn(_netStack, &wq, ep), ep)103	})104	_netStack.SetTransportProtocolHandler(udp.ProtocolNumber, udpForwarder.HandlePacket)105	return _netStack, channelLinkID, nil106}107func setKeepalive(ep tcpip.Endpoint) error {108	idleOpt := tcpip.KeepaliveIdleOption(60 * time.Second)109	if err := ep.SetSockOpt(&idleOpt); err != nil {110		return fmt.Errorf("set keepalive idle: %s", err)111	}112	intervalOpt := tcpip.KeepaliveIntervalOption(30 * time.Second)113	if err := ep.SetSockOpt(&intervalOpt); err != nil {...

netstack_linux.go

Source:netstack_linux.go

...23	}24	s := stack.New(stack.Options{25		NetworkProtocols:   []stack.NetworkProtocolFactory{ipv4.NewProtocol, ipv6.NewProtocol},26		TransportProtocols: []stack.TransportProtocolFactory{tcp.NewProtocol}})27	if err := s.CreateNIC(1, linkEP); err != nil {28		return fmt.Errorf("create nic fail %v", err)29	}30	s.SetNICForwarding(1, ipv4.ProtocolNumber, true)31	s.SetPromiscuousMode(1, true)32	s.SetSpoofing(1, true)33	subnet, _ := tcpip.NewSubnet(tcpip.Address(strings.Repeat("\x00", 4)),34		tcpip.AddressMask(strings.Repeat("\x00", 4)))35	subnet6, _ := tcpip.NewSubnet(tcpip.Address(strings.Repeat("\x00", 16)),36		tcpip.AddressMask(strings.Repeat("\x00", 16)))37	s.SetRouteTable([]tcpip.Route{38		{39			Destination: subnet,40			NIC:         1,41		},42		{43			Destination: subnet6,44			NIC:         1,45		},46	})47	tcpFwd := tcp.NewForwarder(s, 0, 256, func(r *tcp.ForwarderRequest) {48		id := r.ID()49		remoteAddr := &net.TCPAddr{IP: net.IP(id.LocalAddress), Port: int(id.LocalPort)}50		newConn := func(kaInterval time.Duration, kaCount int) (net.Conn, error) {51			var wq waiter.Queue52			ep, err := r.CreateEndpoint(&wq)53			if err != nil {54				r.Complete(true)55				return nil, fmt.Errorf("netstack create endpoint fail %s", err)56			}57			r.Complete(false)58			ep.SocketOptions().SetKeepAlive(true)59			{60				opt := tcpip.KeepaliveIdleOption(kaInterval)61				ep.SetSockOpt(&opt)62			}63			{64				opt := tcpip.KeepaliveIntervalOption(kaInterval)65				ep.SetSockOpt(&opt)66			}...

Create

Using AI Code Generation

1import (2func main() {3	s := stack.New([]string{stack.NetworkProtocolNameIPv4}, []string{stack.TransportProtocolNameTCP}, stack.Options{})4	tun, err := tun.Create("/dev/net/tun", "tun0")5	if err != nil {6		panic(err)7	}8	if err := s.CreateNIC(1, &fdbased.Endpoint{tun}); err != nil {9		panic(err)10	}11	s.SetRouteTable([]tcpip.Route{{12	}})13	if err := s.AddAddress(1, stack.ProtocolAddress{Protocol: stack.ProtocolAddressIPv4, AddressWithPrefix: tcpip.AddressWithPrefix{Address: "\x0a\x00\x00\x01", PrefixLen: 24}}); err != nil {14		panic(err)15	}16	ep, err := s.NewEndpoint(tcp.ProtocolNumber, stack.TransportProtocolNameTCP, &stack.DefaultTransportOptions{})17	if err != nil {18		panic(err)19	}20	if err := ep.Bind(tcpip.FullAddress{NIC: 1, Addr: "\x0a\x00\x00\x01", Port: 80}, nil); err != nil {21		panic(err)22	}23	if err := ep.Listen(10); err != nil {24		panic(err)25	}26	for {27		wq := new(waiter.Queue)28		ep, _, err := ep.Accept(wq)29		if err != nil {30			panic(err)31		}32		go func() {33			for {34				n, _, err := ep.Read(&b, tcpip.ReadOptions{})

Create

Using AI Code Generation

1import (2func main() {3	f, err := os.Create("test.txt")4	if err != nil {5		fmt.Println(err)6	}7	l, err := f.WriteString("testing testing")8	if err != nil {9		fmt.Println(err)10		f.Close()11	}12	fmt.Println(l, "bytes written successfully")13	err = f.Close()14	if err != nil {15		fmt.Println(err)16	}17}18import (19func main() {20	f, err := os.Open("test.txt")21	if err != nil {22		fmt.Println(err)23	}24	l, err := f.WriteString("testing testing")25	if err != nil {26		fmt.Println(err)27		f.Close()28	}29	fmt.Println(l, "bytes written successfully")30	err = f.Close()31	if err != nil {32		fmt.Println(err)33	}34}35import (36func main() {37	f, err := os.OpenFile("test.txt", os.O_APPEND|os.O_WRONLY, 0644)38	if err != nil {39		fmt.Println(err)40	}41	l, err := f.WriteString("testing testing")42	if err != nil {43		fmt.Println(err)44		f.Close()45	}46	fmt.Println(l, "bytes written successfully")47	err = f.Close()48	if err != nil {49		fmt.Println(err)50	}51}52import (53func main() {54	fi, err := os.Stat("test.txt")55	if err != nil {56		fmt.Println(err)57	}58	fmt.Println("File Name:", fi.Name())59	fmt.Println("Size in bytes:", fi.Size())

Create

Using AI Code Generation

1import (2func main() {3	gv, err := gvisor.Create()4	if err != nil {5		fmt.Printf("Failed to create gvisor: %v", err)6	}7	err = gv.Start()8	if err != nil {9		fmt.Printf("Failed to start gvisor: %v", err)10	}11	err = gv.Stop()12	if err != nil {13		fmt.Printf("Failed to stop gvisor: %v", err)14	}15}

Create

Using AI Code Generation

1import (2func main() {3    gvisor := gvisor.Create()4    fmt.Println(gvisor)5}6import (7func main() {8    gvisor := gvisor.Create()9    container := gvisor.CreateContainer("container1")10    fmt.Println(container)11}12import (13func main() {14    gvisor := gvisor.Create()15    container := gvisor.CreateContainer("container1")16    container.Start()17    fmt.Println(container)18}19import (20func main() {21    gvisor := gvisor.Create()22    container := gvisor.CreateContainer("container1")23    container.Start()

Create

Using AI Code Generation

1import (2func main() {3	g := gvisor.NewGvisor()4	id, err := g.Create("test", "gvisor", "gvisor", "gvisor", "gvisor", "gvisor", "gvisor", "gvisor")5	if err != nil {6		fmt.Println(err)7	}8	fmt.Println("Container created with id: ", id)9	err = g.Start(id)10	if err != nil {11		fmt.Println(err)12	}13	time.Sleep(5 * time.Second)14	err = g.Stop(id)15	if err != nil {16		fmt.Println(err)17	}18}193e3d3c2c2b8a        gvisor              "/runsc --debug"    6 seconds ago       Exited (0) 5 seconds ago                       test20func (g *Gvisor) Delete(id string) error {21	resp, err := http.NewRequest("DELETE", url, nil)22	if err != nil {23	}24	resp.Header.Set("Authorization", "Bearer "+g.Token)25	_, err = http.DefaultClient.Do(resp)26	if err != nil {27	}28}29import (30func main() {31	g := gvisor.NewGvisor()

Create

Using AI Code Generation

1import (2func main() {3	gvisor := gvisor.Gvisor{}4	gvisor.Create("test", "test", "test")5	fmt.Println("Hello, playground")6}7import (8type Gvisor struct {9}10func (gvisor Gvisor) Create(name string, image string, tag string) {11	fmt.Println("Creating a new container")12	cmd := exec.Command("docker", "run", "--runtime=runsc", "--name", name, "-it", image+":"+tag, "/bin/bash")13	err := cmd.Run()14	if err != nil {15		fmt.Println(err)16	}17}18import (19type Gvisor struct {20}21func (gvisor Gvisor) Create(name string, image string, tag string) {22	fmt.Println("Creating a new container")23	cmd := exec.Command("docker", "run", "--runtime=runsc", "--name", name, "-it", image+":"+tag, "/bin/bash")24	err := cmd.Run()25	if err != nil {26		fmt.Println(err)27	}28}29import (30func main() {31	gvisor := gvisor.Gvisor{}32	gvisor.Create("test", "test", "test")33	fmt.Println("Hello, playground")34}

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