fix: race in close grpc transport

https://github.com/MetaCubeX/mihomo/issues/2056

component/updater/update_ui.go

@@ -118,7 +118,10 @@ func (u *UIUpdater) downloadUI() error {
 
 	tmpDir := C.Path.Resolve("downloadUI.tmp")
 	defer os.RemoveAll(tmpDir)
-	extractedFolder, err := extract(data, tmpDir)
+
+	os.RemoveAll(tmpDir) // cleanup tmp dir before extract
+	log.Debugln("extractedFolder: %s", tmpDir)
+	err = extract(data, tmpDir)
 	if err != nil {
 		return fmt.Errorf("can't extract compressed file: %w", err)
 	}
@@ -136,8 +139,8 @@ func (u *UIUpdater) downloadUI() error {
 		return fmt.Errorf("prepare UI path failed: %w", err)
 	}
 
-	log.Debugln("moveFolder from %s to %s", extractedFolder, u.externalUIPath)
-	err = moveDir(extractedFolder, u.externalUIPath) // move files from tmp to target
+	log.Debugln("moveFolder from %s to %s", tmpDir, u.externalUIPath)
+	err = moveDir(tmpDir, u.externalUIPath) // move files from tmp to target
 	if err != nil {
 		return fmt.Errorf("move UI folder failed: %w", err)
 	}
@@ -154,63 +157,19 @@ func (u *UIUpdater) prepareUIPath() error {
 	return nil
 }
 
-func unzip(data []byte, dest string) (string, error) {
+func unzip(data []byte, dest string) error {
 	r, err := zip.NewReader(bytes.NewReader(data), int64(len(data)))
 	if err != nil {
-		return "", err
+		return err
 	}
 
 	// check whether or not only exists singleRoot dir
-	rootDir := ""
-	isSingleRoot := true
-	rootItemCount := 0
-	for _, f := range r.File {
-		parts := strings.Split(strings.Trim(f.Name, "/"), "/")
-		if len(parts) == 0 {
-			continue
-		}
-
-		if len(parts) == 1 {
-			isDir := strings.HasSuffix(f.Name, "/")
-			if !isDir {
-				isSingleRoot = false
-				break
-			}
-
-			if rootDir == "" {
-				rootDir = parts[0]
-			}
-			rootItemCount++
-		}
-	}
-
-	if rootItemCount != 1 {
-		isSingleRoot = false
-	}
-
-	// build the dir of extraction
-	var extractedFolder string
-	if isSingleRoot && rootDir != "" {
-		// if the singleRoot, use it directly
-		log.Debugln("Match the singleRoot")
-		extractedFolder = filepath.Join(dest, rootDir)
-		log.Debugln("extractedFolder: %s", extractedFolder)
-	} else {
-		log.Debugln("Match the multiRoot")
-		extractedFolder = dest
-		log.Debugln("extractedFolder: %s", extractedFolder)
-	}
 
 	for _, f := range r.File {
-		var fpath string
-		if isSingleRoot && rootDir != "" {
-			fpath = filepath.Join(dest, f.Name)
-		} else {
-			fpath = filepath.Join(extractedFolder, f.Name)
-		}
+		fpath := filepath.Join(dest, f.Name)
 
 		if !inDest(fpath, dest) {
-			return "", fmt.Errorf("invalid file path: %s", fpath)
+			return fmt.Errorf("invalid file path: %s", fpath)
 		}
 		info := f.FileInfo()
 		if info.IsDir() {
@@ -221,128 +180,77 @@ func unzip(data []byte, dest string) (string, error) {
 			continue // disallow symlink
 		}
 		if err = os.MkdirAll(filepath.Dir(fpath), os.ModePerm); err != nil {
-			return "", err
+			return err
 		}
 		outFile, err := os.OpenFile(fpath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
 		if err != nil {
-			return "", err
+			return err
 		}
 		rc, err := f.Open()
 		if err != nil {
-			return "", err
+			return err
 		}
 		_, err = io.Copy(outFile, rc)
 		outFile.Close()
 		rc.Close()
 		if err != nil {
-			return "", err
+			return err
 		}
 	}
-	return extractedFolder, nil
+	return nil
 }
 
-func untgz(data []byte, dest string) (string, error) {
+func untgz(data []byte, dest string) error {
 	gzr, err := gzip.NewReader(bytes.NewReader(data))
 	if err != nil {
-		return "", err
+		return err
 	}
 	defer gzr.Close()
 
 	tr := tar.NewReader(gzr)
 
-	rootDir := ""
-	isSingleRoot := true
-	rootItemCount := 0
-	for {
-		header, err := tr.Next()
-		if err == io.EOF {
-			break
-		}
-		if err != nil {
-			return "", err
-		}
-
-		parts := strings.Split(cleanTarPath(header.Name), string(os.PathSeparator))
-		if len(parts) == 0 {
-			continue
-		}
-
-		if len(parts) == 1 {
-			isDir := header.Typeflag == tar.TypeDir
-			if !isDir {
-				isSingleRoot = false
-				break
-			}
-
-			if rootDir == "" {
-				rootDir = parts[0]
-			}
-			rootItemCount++
-		}
-	}
-
-	if rootItemCount != 1 {
-		isSingleRoot = false
-	}
-
 	_ = gzr.Reset(bytes.NewReader(data))
 	tr = tar.NewReader(gzr)
 
-	var extractedFolder string
-	if isSingleRoot && rootDir != "" {
-		log.Debugln("Match the singleRoot")
-		extractedFolder = filepath.Join(dest, rootDir)
-		log.Debugln("extractedFolder: %s", extractedFolder)
-	} else {
-		log.Debugln("Match the multiRoot")
-		extractedFolder = dest
-		log.Debugln("extractedFolder: %s", extractedFolder)
-	}
-
 	for {
 		header, err := tr.Next()
 		if err == io.EOF {
 			break
 		}
 		if err != nil {
-			return "", err
+			return err
 		}
 
-		var fpath string
-		if isSingleRoot && rootDir != "" {
-			fpath = filepath.Join(dest, cleanTarPath(header.Name))
-		} else {
-			fpath = filepath.Join(extractedFolder, cleanTarPath(header.Name))
-		}
+		fpath := filepath.Join(dest, header.Name)
 
 		if !inDest(fpath, dest) {
-			return "", fmt.Errorf("invalid file path: %s", fpath)
+			return fmt.Errorf("invalid file path: %s", fpath)
 		}
 
 		switch header.Typeflag {
 		case tar.TypeDir:
 			if err = os.MkdirAll(fpath, os.FileMode(header.Mode)); err != nil {
-				return "", err
+				return err
 			}
 		case tar.TypeReg:
 			if err = os.MkdirAll(filepath.Dir(fpath), os.ModePerm); err != nil {
-				return "", err
+				return err
 			}
 			outFile, err := os.OpenFile(fpath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, os.FileMode(header.Mode))
 			if err != nil {
-				return "", err
+				return err
 			}
 			if _, err := io.Copy(outFile, tr); err != nil {
 				outFile.Close()
-				return "", err
+				return err
 			}
 			outFile.Close()
 		}
 	}
-	return extractedFolder, nil
+	return nil
 }
 
-func extract(data []byte, dest string) (string, error) {
+func extract(data []byte, dest string) error {
 	fileType := detectFileType(data)
 	log.Debugln("compression Type: %s", fileType)
 	switch fileType {
@@ -351,7 +259,7 @@ func extract(data []byte, dest string) (string, error) {
 	case typeTarGzip:
 		return untgz(data, dest)
 	default:
-		return "", fmt.Errorf("unknown or unsupported file type")
+		return fmt.Errorf("unknown or unsupported file type")
 	}
 }
 
@@ -393,6 +301,15 @@ func moveDir(src string, dst string) error {
 		return err
 	}
 
+	if len(dirEntryList) == 1 && dirEntryList[0].IsDir() {
+		src = filepath.Join(src, dirEntryList[0].Name())
+		log.Debugln("match the singleRoot: %s", src)
+		dirEntryList, err = os.ReadDir(src)
+		if err != nil {
+			return err
+		}
+	}
+
 	for _, dirEntry := range dirEntryList {
 		err = os.Rename(filepath.Join(src, dirEntry.Name()), filepath.Join(dst, dirEntry.Name()))
 		if err != nil {

docs/config.yaml

@@ -645,6 +645,7 @@ proxies: # socks5
     reality-opts:
       public-key: xxx
       short-id: xxx # optional
+      support-x25519mlkem768: false # 如果服务端支持可手动设置为true
     client-fingerprint: chrome # cannot be empty
 
   - name: "vless-reality-grpc"
@@ -664,6 +665,7 @@ proxies: # socks5
     reality-opts:
       public-key: CrrQSjAG_YkHLwvM2M-7XkKJilgL5upBKCp0od0tLhE
       short-id: 10f897e26c4b9478
+      support-x25519mlkem768: false # 如果服务端支持可手动设置为true
 
   - name: "vless-ws"
     type: vless

go.mod

@@ -27,7 +27,7 @@ require (
 	github.com/metacubex/randv2 v0.2.0
 	github.com/metacubex/sing v0.5.3-0.20250504031621-1f99e54c15b7
 	github.com/metacubex/sing-mux v0.3.2
-	github.com/metacubex/sing-quic v0.0.0-20250517090120-462e75d27336
+	github.com/metacubex/sing-quic v0.0.0-20250520025433-6e556a6bef7a
 	github.com/metacubex/sing-shadowsocks v0.2.9
 	github.com/metacubex/sing-shadowsocks2 v0.2.3
 	github.com/metacubex/sing-shadowtls v0.0.0-20250503063515-5d9f966d17a2

go.sum

@@ -120,10 +120,8 @@ github.com/metacubex/sing v0.5.3-0.20250504031621-1f99e54c15b7 h1:m4nSxvw46JEgxM
 github.com/metacubex/sing v0.5.3-0.20250504031621-1f99e54c15b7/go.mod h1:ypf0mjwlZm0sKdQSY+yQvmsbWa0hNPtkeqyRMGgoN+w=
 github.com/metacubex/sing-mux v0.3.2 h1:nJv52pyRivHcaZJKk2JgxpaVvj1GAXG81scSa9N7ncw=
 github.com/metacubex/sing-mux v0.3.2/go.mod h1:3rt1soewn0O6j89GCLmwAQFsq257u0jf2zQSPhTL3Bw=
-github.com/metacubex/sing-quic v0.0.0-20250511034158-b46e0e3e81b2 h1:wfmYgtECbEYo1slMtyo+2kMqscYYDSjU/TVgS3018F4=
-github.com/metacubex/sing-quic v0.0.0-20250511034158-b46e0e3e81b2/go.mod h1:P1kd57U6XXmXv9PbwWdznUGT0k9bKgFJXF0fEORbIlk=
-github.com/metacubex/sing-quic v0.0.0-20250517090120-462e75d27336 h1:5BgpaFkTzkePwF1A8rmhCqgyOMG79BLsAhFR8W8SiRo=
-github.com/metacubex/sing-quic v0.0.0-20250517090120-462e75d27336/go.mod h1:JPTpf7fpnojsSuwRJExhSZSy63pVbp3VM39+zj+sAJM=
+github.com/metacubex/sing-quic v0.0.0-20250520025433-6e556a6bef7a h1:Ho73vGiB94LmtK5T+tKVwtCNEi/YiHmPjlqpHSAmAVs=
+github.com/metacubex/sing-quic v0.0.0-20250520025433-6e556a6bef7a/go.mod h1:JPTpf7fpnojsSuwRJExhSZSy63pVbp3VM39+zj+sAJM=
 github.com/metacubex/sing-shadowsocks v0.2.9 h1:2e++13WNN7EGjGtvrGLUzW1xrCdQbW2gIFpgw5GEw00=
 github.com/metacubex/sing-shadowsocks v0.2.9/go.mod h1:CJSEGO4FWQAWe+ZiLZxCweGdjRR60A61SIoVjdjQeBA=
 github.com/metacubex/sing-shadowsocks2 v0.2.3 h1:v3rNS/5Ywh0NIZ6VU/NmdERQIN5RePzyxCFeQsU4Cx0=

transport/gun/gun.go

@@ -18,7 +18,6 @@ import (
 	"sync"
 	"time"
 
-	"github.com/metacubex/mihomo/common/atomic"
 	"github.com/metacubex/mihomo/common/buf"
 	"github.com/metacubex/mihomo/common/pool"
 	"github.com/metacubex/mihomo/component/ech"
@@ -42,16 +41,19 @@ type DialFn = func(ctx context.Context, network, addr string) (net.Conn, error)
 
 type Conn struct {
 	initFn func() (io.ReadCloser, netAddr, error)
-	writer io.Writer
+	writer io.Writer // writer must not nil
 	closer io.Closer
 	netAddr
 
-	reader io.ReadCloser
-	once   sync.Once
-	closed atomic.Bool
-	err    error
-	remain int
-	br     *bufio.Reader
+	initOnce sync.Once
+	initErr  error
+	reader   io.ReadCloser
+	br       *bufio.Reader
+	remain   int
+
+	closeMutex sync.Mutex
+	closed     bool
+
 	// deadlines
 	deadline *time.Timer
 }
@@ -65,7 +67,7 @@ type Config struct {
 func (g *Conn) initReader() {
 	reader, addr, err := g.initFn()
 	if err != nil {
-		g.err = err
+		g.initErr = err
 		if closer, ok := g.writer.(io.Closer); ok {
 			closer.Close()
 		}
@@ -73,17 +75,21 @@ func (g *Conn) initReader() {
 	}
 	g.netAddr = addr
 
-	if !g.closed.Load() {
-		g.reader = reader
-		g.br = bufio.NewReader(reader)
-	} else {
-		reader.Close()
+	g.closeMutex.Lock()
+	defer g.closeMutex.Unlock()
+	if g.closed { // if g.Close() be called between g.initFn(), direct close the initFn returned reader
+		_ = reader.Close()
+		g.initErr = net.ErrClosed
+		return
 	}
+
+	g.reader = reader
+	g.br = bufio.NewReader(reader)
 }
 
 func (g *Conn) Init() error {
-	g.once.Do(g.initReader)
-	return g.err
+	g.initOnce.Do(g.initReader)
+	return g.initErr
 }
 
 func (g *Conn) Read(b []byte) (n int, err error) {
@@ -100,8 +106,6 @@ func (g *Conn) Read(b []byte) (n int, err error) {
 		n, err = io.ReadFull(g.br, b[:size])
 		g.remain -= n
 		return
-	} else if g.reader == nil {
-		return 0, net.ErrClosed
 	}
 
 	// 0x00 grpclength(uint32) 0x0A uleb128 payload
@@ -147,8 +151,8 @@ func (g *Conn) Write(b []byte) (n int, err error) {
 	buf.Write(b)
 
 	_, err = g.writer.Write(buf.Bytes())
-	if err == io.ErrClosedPipe && g.err != nil {
-		err = g.err
+	if err == io.ErrClosedPipe && g.initErr != nil {
+		err = g.initErr
 	}
 
 	if flusher, ok := g.writer.(http.Flusher); ok {
@@ -170,8 +174,8 @@ func (g *Conn) WriteBuffer(buffer *buf.Buffer) error {
 	binary.PutUvarint(header[6:], uint64(dataLen))
 	_, err := g.writer.Write(buffer.Bytes())
 
-	if err == io.ErrClosedPipe && g.err != nil {
-		err = g.err
+	if err == io.ErrClosedPipe && g.initErr != nil {
+		err = g.initErr
 	}
 
 	if flusher, ok := g.writer.(http.Flusher); ok {
@@ -186,7 +190,17 @@ func (g *Conn) FrontHeadroom() int {
 }
 
 func (g *Conn) Close() error {
-	g.closed.Store(true)
+	g.initOnce.Do(func() { // if initReader not called, it should not be run anymore
+		g.initErr = net.ErrClosed
+	})
+
+	g.closeMutex.Lock()
+	defer g.closeMutex.Unlock()
+	if g.closed {
+		return nil
+	}
+	g.closed = true
+
 	var errorArr []error
 
 	if reader := g.reader; reader != nil {