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// 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"
)
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")
)
defer tool.Init()()
if *flagDownloadBug != "" {
if err := downloadBug(*flagDownloadBug, *flagInput); 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 string) error {
if inputFile == "" {
return fmt.Errorf("-download-bug requires -input flag")
}
resp, err := get(fmt.Sprintf("/bug?extid=%v&json=1", extID))
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))
if err != nil {
return err
}
inputs["ReproC"], err = get(crash["c-reproducer"].(string))
if err != nil {
return err
}
inputs["KernelConfig"], err = get(crash["kernel-config"].(string))
if err != nil {
return err
}
data, err := json.MarshalIndent(inputs, "", "\t")
if err != nil {
return err
}
return osutil.WriteFile(inputFile, data)
}
func get(path string) (string, error) {
if path == "" {
return "", nil
}
const host = "https://syzbot.org"
resp, err := http.Get(fmt.Sprintf("%v%v", host, path))
if err != nil {
return "", err
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
return string(body), err
}
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