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// Copyright 2020 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package vmware
import (
"context"
"fmt"
"io"
"net"
"os"
"os/exec"
"path/filepath"
"strconv"
"strings"
"time"
"github.com/google/syzkaller/pkg/config"
"github.com/google/syzkaller/pkg/log"
"github.com/google/syzkaller/pkg/osutil"
"github.com/google/syzkaller/pkg/report"
"github.com/google/syzkaller/sys/targets"
"github.com/google/syzkaller/vm/vmimpl"
)
func init() {
vmimpl.Register("vmware", vmimpl.Type{
Ctor: ctor,
})
}
type Config struct {
BaseVMX string `json:"base_vmx"` // location of the base vmx
Count int `json:"count"` // number of VMs to run in parallel
}
type Pool struct {
env *vmimpl.Env
cfg *Config
}
type instance struct {
cfg *Config
baseVMX string
vmx string
ipAddr string
closed chan bool
debug bool
sshuser string
sshkey string
forwardPort int
timeouts targets.Timeouts
}
func ctor(env *vmimpl.Env) (vmimpl.Pool, error) {
cfg := &Config{}
if err := config.LoadData(env.Config, cfg); err != nil {
return nil, err
}
if cfg.BaseVMX == "" {
return nil, fmt.Errorf("config param base_vmx is empty")
}
if cfg.Count < 1 || cfg.Count > 128 {
return nil, fmt.Errorf("invalid config param count: %v, want [1, 128]", cfg.Count)
}
if _, err := exec.LookPath("vmrun"); err != nil {
return nil, fmt.Errorf("cannot find vmrun")
}
pool := &Pool{
cfg: cfg,
env: env,
}
return pool, nil
}
func (pool *Pool) Count() int {
return pool.cfg.Count
}
func (pool *Pool) Create(workdir string, index int) (vmimpl.Instance, error) {
createTime := strconv.FormatInt(time.Now().UnixNano(), 10)
vmx := filepath.Join(workdir, createTime, "syzkaller.vmx")
sshkey := pool.env.SSHKey
sshuser := pool.env.SSHUser
inst := &instance{
cfg: pool.cfg,
debug: pool.env.Debug,
baseVMX: pool.cfg.BaseVMX,
vmx: vmx,
sshkey: sshkey,
sshuser: sshuser,
closed: make(chan bool),
timeouts: pool.env.Timeouts,
}
if err := inst.clone(); err != nil {
return nil, err
}
if err := inst.boot(); err != nil {
return nil, err
}
return inst, nil
}
func (inst *instance) clone() error {
if inst.debug {
log.Logf(0, "cloning %v to %v", inst.baseVMX, inst.vmx)
}
if _, err := osutil.RunCmd(2*time.Minute, "", "vmrun", "clone", inst.baseVMX, inst.vmx, "full"); err != nil {
return err
}
return nil
}
func (inst *instance) boot() error {
if inst.debug {
log.Logf(0, "starting %v", inst.vmx)
}
if _, err := osutil.RunCmd(5*time.Minute, "", "vmrun", "start", inst.vmx, "nogui"); err != nil {
return err
}
if inst.debug {
log.Logf(0, "getting IP of %v", inst.vmx)
}
ip, err := osutil.RunCmd(5*time.Minute, "", "vmrun", "getGuestIPAddress", inst.vmx, "-wait")
if err != nil {
return err
}
inst.ipAddr = strings.TrimSuffix(string(ip), "\n")
if inst.debug {
log.Logf(0, "VM %v has IP: %v", inst.vmx, inst.ipAddr)
}
return nil
}
func (inst *instance) Forward(port int) (string, error) {
if inst.forwardPort != 0 {
return "", fmt.Errorf("isolated: Forward port already set")
}
if port == 0 {
return "", fmt.Errorf("isolated: Forward port is zero")
}
inst.forwardPort = port
return fmt.Sprintf("127.0.0.1:%v", port), nil
}
func (inst *instance) Close() error {
if inst.debug {
log.Logf(0, "stopping %v", inst.vmx)
}
osutil.RunCmd(2*time.Minute, "", "vmrun", "stop", inst.vmx, "hard")
if inst.debug {
log.Logf(0, "deleting %v", inst.vmx)
}
osutil.RunCmd(2*time.Minute, "", "vmrun", "deleteVM", inst.vmx)
close(inst.closed)
return nil
}
func (inst *instance) Copy(hostSrc string) (string, error) {
base := filepath.Base(hostSrc)
vmDst := filepath.Join("/", base)
args := append(vmimpl.SCPArgs(inst.debug, inst.sshkey, 22, false),
hostSrc, fmt.Sprintf("%v@%v:%v", inst.sshuser, inst.ipAddr, vmDst))
if inst.debug {
log.Logf(0, "running command: scp %#v", args)
}
_, err := osutil.RunCmd(3*time.Minute, "", "scp", args...)
if err != nil {
return "", err
}
return vmDst, nil
}
func (inst *instance) Run(ctx context.Context, command string) (
<-chan []byte, <-chan error, error) {
vmxDir := filepath.Dir(inst.vmx)
serial := filepath.Join(vmxDir, "serial")
dmesg, err := net.Dial("unix", serial)
if err != nil {
return nil, nil, err
}
rpipe, wpipe, err := osutil.LongPipe()
if err != nil {
dmesg.Close()
return nil, nil, err
}
args := vmimpl.SSHArgs(inst.debug, inst.sshkey, 22, false)
// Forward target port as part of the ssh connection (reverse proxy)
if inst.forwardPort != 0 {
proxy := fmt.Sprintf("%v:127.0.0.1:%v", inst.forwardPort, inst.forwardPort)
args = append(args, "-R", proxy)
}
args = append(args, inst.sshuser+"@"+inst.ipAddr, "cd / && exec "+command)
if inst.debug {
log.Logf(0, "running command: ssh %#v", args)
}
cmd := osutil.Command("ssh", args...)
cmd.Stdout = wpipe
cmd.Stderr = wpipe
if err := cmd.Start(); err != nil {
dmesg.Close()
rpipe.Close()
wpipe.Close()
return nil, nil, err
}
wpipe.Close()
var tee io.Writer
if inst.debug {
tee = os.Stdout
}
merger := vmimpl.NewOutputMerger(tee)
merger.Add("dmesg", dmesg)
merger.Add("ssh", rpipe)
return vmimpl.Multiplex(ctx, cmd, merger, vmimpl.MultiplexConfig{
Console: dmesg,
Close: inst.closed,
Debug: inst.debug,
Scale: inst.timeouts.Scale,
})
}
func (inst *instance) Diagnose(rep *report.Report) ([]byte, bool) {
return nil, false
}
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