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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.
package main
import (
"context"
"encoding/json"
"flag"
"fmt"
"maps"
_ "net/http/pprof"
"path/filepath"
"sync"
"time"
"github.com/google/syzkaller/dashboard/dashapi"
"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/config"
"github.com/google/syzkaller/pkg/log"
"github.com/google/syzkaller/pkg/mgrconfig"
"github.com/google/syzkaller/pkg/osutil"
"github.com/google/syzkaller/pkg/tool"
"github.com/google/syzkaller/pkg/updater"
"github.com/google/syzkaller/prog"
)
type Config struct {
// Currently serves only net/http/pprof handlers.
HTTP string `json:"http"`
DashboardAddr string `json:"dashboard_addr"`
DashboardClient string `json:"dashboard_client"` // Global non-namespace client.
DashboardKey string `json:"dashboard_key"`
SyzkallerRepo string `json:"syzkaller_repo"`
SyzkallerBranch string `json:"syzkaller_branch"`
// Pre-built tools/clang/codesearch clang tool.
CodesearchToolBin string `json:"codesearch_tool_bin"`
KernelConfig string `json:"kernel_config"`
Target string `json:"target"`
Image string `json:"image"`
Type string `json:"type"`
VM json.RawMessage `json:"vm"`
// Max workdir cache size (defaults to 1TB).
// The whole workdir may be slightly larger, since e.g. kernel checkout is not accounted here.
CacheSize uint64 `json:"cache_size"`
// Use fixed base commit for patching jobs (for testing).
FixedBaseCommit string `json:"fixed_base_commit"`
// Use this LLM model (for testing, if empty use workflow-default model).
Model string `json:"model"`
}
func main() {
var (
flagConfig = flag.String("config", "", "config file")
flagExitOnUpgrade = flag.Bool("exit-on-upgrade", false,
"exit after a syz-ci upgrade is applied; otherwise syz-ci restarts")
flagAutoUpdate = flag.Bool("autoupdate", true, "auto-update the binary (for testing)")
)
defer tool.Init()()
log.SetName("syz-agent")
if err := run(*flagConfig, *flagExitOnUpgrade, *flagAutoUpdate); err != nil {
log.Fatal(err)
}
}
func run(configFile string, exitOnUpgrade, autoUpdate bool) error {
cfg := &Config{
SyzkallerRepo: "https://github.com/google/syzkaller.git",
SyzkallerBranch: "master",
CacheSize: 1 << 40, // 1TB should be enough for everyone!
}
if err := config.LoadFile(configFile, cfg); err != nil {
return fmt.Errorf("failed to load config: %w", err)
}
tool.ServeHTTP(cfg.HTTP)
os, vmarch, arch, _, _, err := mgrconfig.SplitTarget(cfg.Target)
if err != nil {
return err
}
dash, err := dashapi.New(cfg.DashboardClient, cfg.DashboardAddr, cfg.DashboardKey)
if err != nil {
return err
}
buildSem := osutil.NewSemaphore(1)
updater, err := updater.New(&updater.Config{
ExitOnUpdate: exitOnUpgrade,
BuildSem: buildSem,
SyzkallerRepo: cfg.SyzkallerRepo,
SyzkallerBranch: cfg.SyzkallerBranch,
Targets: map[updater.Target]bool{
{
OS: os,
VMArch: vmarch,
Arch: arch,
}: true,
},
})
if err != nil {
return err
}
updatePending := make(chan struct{})
shutdownPending := make(chan struct{})
osutil.HandleInterrupts(shutdownPending)
updater.UpdateOnStart(autoUpdate, updatePending, shutdownPending)
const workdir = "workdir"
cache, err := aflow.NewCache(filepath.Join(workdir, "cache"), cfg.CacheSize)
if err != nil {
return err
}
s := &Server{
cfg: cfg,
dash: dash,
cache: cache,
workdir: workdir,
}
ctx, stop := context.WithCancel(context.Background())
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
for {
ok, err := s.poll(ctx)
if err != nil {
log.Error(err)
dash.LogError("syz-agent", "%v", err)
}
var delay time.Duration
if !ok {
// Don't poll dashboard too often, if there are no jobs,
// or errors are happenning.
delay = 10 * time.Second
}
select {
case <-ctx.Done():
return
case <-time.After(delay):
}
}
}()
select {
case <-shutdownPending:
case <-updatePending:
}
stop()
wg.Wait()
select {
case <-shutdownPending:
default:
updater.UpdateAndRestart()
}
return nil
}
type Server struct {
cfg *Config
dash *dashapi.Dashboard
cache *aflow.Cache
workdir string
}
func (s *Server) poll(ctx context.Context) (
bool, error) {
req := &dashapi.AIJobPollReq{
CodeRevision: prog.GitRevision,
}
for _, flow := range aflow.Flows {
model := flow.Model
if s.cfg.Model != "" {
model = s.cfg.Model
}
req.Workflows = append(req.Workflows, dashapi.AIWorkflow{
Type: flow.Type,
Name: flow.Name,
LLMModel: model,
})
}
resp, err := s.dash.AIJobPoll(req)
if err != nil {
return false, err
}
if resp.ID == "" {
return false, nil
}
doneReq := &dashapi.AIJobDoneReq{
ID: resp.ID,
}
results, jobErr := s.executeJob(ctx, resp)
doneReq.Results = results
if jobErr != nil {
doneReq.Error = jobErr.Error()
}
if err := s.dash.AIJobDone(doneReq); err != nil {
return false, err
}
if jobErr != nil {
return false, jobErr
}
return true, nil
}
func (s *Server) executeJob(ctx context.Context, req *dashapi.AIJobPollResp) (map[string]any, error) {
flow := aflow.Flows[req.Workflow]
if flow == nil {
return nil, fmt.Errorf("unsupported flow %q", req.Workflow)
}
model := flow.Model
if s.cfg.Model != "" {
model = s.cfg.Model
}
inputs := map[string]any{
"Syzkaller": osutil.Abs(filepath.FromSlash("syzkaller/current")),
"CodesearchToolBin": s.cfg.CodesearchToolBin,
"Image": s.cfg.Image,
"Type": s.cfg.Type,
"VM": s.cfg.VM,
"FixedBaseCommit": s.cfg.FixedBaseCommit,
}
maps.Insert(inputs, maps.All(req.Args))
onEvent := func(span *trajectory.Span) error {
log.Logf(0, "%v", span)
return s.dash.AITrajectoryLog(&dashapi.AITrajectoryReq{
JobID: req.ID,
Span: span,
})
}
return flow.Execute(ctx, model, s.workdir, inputs, s.cache, onEvent)
}
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