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
|
// Copyright 2025 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.
// syz-aflow tool can be used to invoke any agentic workflow registered with pkg/aflow.
// For example, to run the patching workflow use:
//
// go run ./tools/syz-aflow -input=input.json -download-bug=d8fd35fa6177afa8c92b
// go run ./tools/syz-aflow -input=input.json -workflow=patching -workdir=workdir
package main
import (
"context"
"encoding/json"
"flag"
"fmt"
"io"
"log"
"net/http"
"os"
"path/filepath"
"github.com/google/syzkaller/pkg/aflow"
_ "github.com/google/syzkaller/pkg/aflow/flow"
"github.com/google/syzkaller/pkg/aflow/trajectory"
"github.com/google/syzkaller/pkg/osutil"
"github.com/google/syzkaller/pkg/tool"
"golang.org/x/oauth2/google"
)
func main() {
var (
flagFlow = flag.String("workflow", "", "workflow to execute")
flagInput = flag.String("input", "", "input json file with workflow arguments")
flagWorkdir = flag.String("workdir", "", "directory for kernel checkout, kernel builds, etc")
flagModel = flag.String("model", aflow.DefaultModel, "use this LLM model")
flagCacheSize = flag.String("cache-size", "10GB", "max cache size (e.g. 100MB, 5GB, 1TB)")
flagDownloadBug = flag.String("download-bug", "", "extid of a bug to download from the dashboard"+
" and save into -input file")
flagAuth = flag.Bool("auth", false, "use gcloud auth token for downloading bugs (set it up with"+
" gcloud auth application-default login)")
)
defer tool.Init()()
if *flagDownloadBug != "" {
token := ""
if *flagAuth {
var err error
token, err = getAccessToken()
if err != nil {
tool.Fail(err)
}
}
if err := downloadBug(*flagDownloadBug, *flagInput, token); err != nil {
tool.Fail(err)
}
return
}
if *flagFlow == "" {
fmt.Fprintf(os.Stderr, "syz-aflow usage:\n")
flag.PrintDefaults()
fmt.Fprintf(os.Stderr, "available workflows:\n")
for _, flow := range aflow.Flows {
fmt.Fprintf(os.Stderr, "\t%v: %v\n", flow.Name, flow.Description)
}
return
}
cacheSize, err := parseSize(*flagCacheSize)
if err != nil {
tool.Fail(err)
}
if err := run(context.Background(), *flagModel, *flagFlow, *flagInput, *flagWorkdir, cacheSize); err != nil {
tool.Fail(err)
}
}
func parseSize(s string) (uint64, error) {
var size uint64
var suffix string
if _, err := fmt.Sscanf(s, "%d%s", &size, &suffix); err != nil {
return 0, fmt.Errorf("failed to parse cache size %q: %w", s, err)
}
switch suffix {
case "KB":
size <<= 10
case "MB":
size <<= 20
case "GB":
size <<= 30
case "TB":
size <<= 40
case "":
default:
return 0, fmt.Errorf("unknown size suffix %q", suffix)
}
return size, nil
}
func run(ctx context.Context, model, flowName, inputFile, workdir string, cacheSize uint64) error {
flow := aflow.Flows[flowName]
if flow == nil {
return fmt.Errorf("workflow %q is not found", flowName)
}
inputData, err := os.ReadFile(inputFile)
if err != nil {
return fmt.Errorf("failed to open -input file: %w", err)
}
var inputs map[string]any
if err := json.Unmarshal(inputData, &inputs); err != nil {
return err
}
cache, err := aflow.NewCache(filepath.Join(workdir, "cache"), cacheSize)
if err != nil {
return err
}
_, err = flow.Execute(ctx, model, workdir, inputs, cache, onEvent)
return err
}
func onEvent(span *trajectory.Span) error {
log.Printf("%v", span)
return nil
}
func downloadBug(extID, inputFile, token string) error {
if inputFile == "" {
return fmt.Errorf("-download-bug requires -input flag")
}
resp, err := get(fmt.Sprintf("/bug?extid=%v&json=1", extID), token)
if err != nil {
return err
}
var info map[string]any
if err := json.Unmarshal([]byte(resp), &info); err != nil {
return err
}
crash := info["crashes"].([]any)[0].(map[string]any)
inputs := map[string]any{
"SyzkallerCommit": crash["syzkaller-commit"],
}
inputs["ReproSyz"], err = get(crash["syz-reproducer"].(string), token)
if err != nil {
return err
}
inputs["ReproC"], err = get(crash["c-reproducer"].(string), token)
if err != nil {
return err
}
inputs["KernelConfig"], err = get(crash["kernel-config"].(string), token)
if err != nil {
return err
}
data, err := json.MarshalIndent(inputs, "", "\t")
if err != nil {
return err
}
return osutil.WriteFile(inputFile, data)
}
func get(path, token string) (string, error) {
if path == "" {
return "", nil
}
const host = "https://syzbot.org"
req, err := http.NewRequest("GET", fmt.Sprintf("%v%v", host, path), nil)
if err != nil {
return "", err
}
if token != "" {
req.Header.Add("Authorization", "Bearer "+token)
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return "", fmt.Errorf("request failed: %v", resp.Status)
}
body, err := io.ReadAll(resp.Body)
return string(body), err
}
func getAccessToken() (string, error) {
ctx := context.Background()
scopes := []string{"https://www.googleapis.com/auth/cloud-platform"}
creds, err := google.FindDefaultCredentials(ctx, scopes...)
if err != nil {
return "", err
}
token, err := creds.TokenSource.Token()
if err != nil {
return "", fmt.Errorf("error retrieving token from source: %w", err)
}
return token.AccessToken, nil
}
|
