syz-fuzzer: partially revert "syz-fuzzer: fix gvisor testing"

This breaks patch testing on syz-ci as it can use older version of syz-fuzzer.

2 files changed, 2 insertions, 17 deletions

diff --git a/pkg/instance/instance.go b/pkg/instance/instance.go
index f804b2724..4e28e0b92 100644
--- a/pkg/instance/instance.go
+++ b/pkg/instance/instance.go
@@ -8,7 +8,6 @@ package instance
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"path/filepath"
@@ -216,20 +215,9 @@ func (inst *inst) testInstance() error {
 	go func() {
 		conn, err := ln.Accept()
 		if err != nil {
-			acceptErr <- err
-			return
+			conn.Close()
 		}
-		defer conn.Close()
-		data, err := ioutil.ReadAll(conn)
-		if err != nil {
-			acceptErr <- err
-			return
-		}
-		if string(data) != "HELLO" {
-			acceptErr <- fmt.Errorf("received bad handshake from VM: %q", string(data))
-			return
-		}
-		acceptErr <- nil
+		acceptErr <- err
 	}()
 	fwdAddr, err := inst.vm.Forward(ln.Addr().(*net.TCPAddr).Port)
 	if err != nil {
diff --git a/syz-fuzzer/testing.go b/syz-fuzzer/testing.go
index 7b544ee35..990891348 100644
--- a/syz-fuzzer/testing.go
+++ b/syz-fuzzer/testing.go
@@ -33,9 +33,6 @@ func testImage(hostAddr string, args *checkArgs) {
 	if err != nil {
 		log.Fatalf("failed to connect: %v", err)
 	}
-	if _, err := conn.Write([]byte("HELLO")); err != nil {
-		log.Fatalf("failed to write to host: %v", err)
-	}
 	conn.Close()
 	if _, err := checkMachine(args); err != nil {
 		log.Fatalf("%v", err)