1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
// 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(_ context.Context, 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
}
|
