Update x/net

vendor/golang.org/x/net/http2/frame.go

@@ -225,6 +225,11 @@ var fhBytes = sync.Pool{
 	},
 }
 
+func invalidHTTP1LookingFrameHeader() FrameHeader {
+	fh, _ := readFrameHeader(make([]byte, frameHeaderLen), strings.NewReader("HTTP/1.1 "))
+	return fh
+}
+
 // ReadFrameHeader reads 9 bytes from r and returns a FrameHeader.
 // Most users should use Framer.ReadFrame instead.
 func ReadFrameHeader(r io.Reader) (FrameHeader, error) {
@@ -503,10 +508,16 @@ func (fr *Framer) ReadFrame() (Frame, error) {
 		return nil, err
 	}
 	if fh.Length > fr.maxReadSize {
+		if fh == invalidHTTP1LookingFrameHeader() {
+			return nil, fmt.Errorf("http2: failed reading the frame payload: %w, note that the frame header looked like an HTTP/1.1 header", err)
+		}
 		return nil, ErrFrameTooLarge
 	}
 	payload := fr.getReadBuf(fh.Length)
 	if _, err := io.ReadFull(fr.r, payload); err != nil {
+		if fh == invalidHTTP1LookingFrameHeader() {
+			return nil, fmt.Errorf("http2: failed reading the frame payload: %w, note that the frame header looked like an HTTP/1.1 header", err)
+		}
 		return nil, err
 	}
 	f, err := typeFrameParser(fh.Type)(fr.frameCache, fh, fr.countError, payload)

vendor/golang.org/x/net/http2/server.go

@@ -1068,7 +1068,10 @@ func (sc *serverConn) serve(conf http2Config) {
 
 func (sc *serverConn) handlePingTimer(lastFrameReadTime time.Time) {
 	if sc.pingSent {
-		sc.vlogf("timeout waiting for PING response")
+		sc.logf("timeout waiting for PING response")
+		if f := sc.countErrorFunc; f != nil {
+			f("conn_close_lost_ping")
+		}
 		sc.conn.Close()
 		return
 	}

vendor/modules.txt

@@ -154,7 +154,7 @@ golang.org/x/mod/internal/lazyregexp
 golang.org/x/mod/modfile
 golang.org/x/mod/module
 golang.org/x/mod/semver
-# golang.org/x/net v0.37.0
+# golang.org/x/net v0.38.0
 ## explicit; go 1.23.0
 golang.org/x/net/bpf
 golang.org/x/net/http/httpguts