diff --git a/common/buf/ptr.go b/common/buf/ptr.go
index 1c26a93..901c9e3 100644
--- a/common/buf/ptr.go
+++ b/common/buf/ptr.go
@@ -4,6 +4,8 @@ package buf
 
 import (
 	"unsafe"
+
+	"github.com/sagernet/sing/common"
 )
 
 type dbgVar struct {
@@ -17,8 +19,10 @@ var dbgvars any
 // go.info.runtime.dbgvars: relocation target go.info.[]github.com/sagernet/sing/common/buf.dbgVar not defined
 // var dbgvars []dbgVar
 
-//nolint:gochecknoinits
 func init() {
+	if !common.UnsafeBuffer {
+		return
+	}
 	debugVars := *(*[]dbgVar)(unsafe.Pointer(&dbgvars))
 	for _, v := range debugVars {
 		if v.name == "invalidptr" {
diff --git a/common/exceptions/error.go b/common/exceptions/error.go
index f43c7e1..64b6468 100644
--- a/common/exceptions/error.go
+++ b/common/exceptions/error.go
@@ -32,11 +32,8 @@ func Extend(cause error, message ...any) error {
 	return &extendedError{F.ToString(message...), cause}
 }
 
-//go:linkname errCanceled net.errCanceled
-var errCanceled error
-
 func IsClosedOrCanceled(err error) bool {
-	return IsMulti(err, io.EOF, net.ErrClosed, io.ErrClosedPipe, os.ErrClosed, syscall.EPIPE, syscall.ECONNRESET, context.Canceled, context.DeadlineExceeded, errCanceled)
+	return IsMulti(err, io.EOF, net.ErrClosed, io.ErrClosedPipe, os.ErrClosed, syscall.EPIPE, syscall.ECONNRESET, context.Canceled, context.DeadlineExceeded)
 }
 
 func IsClosed(err error) bool {
@@ -44,5 +41,5 @@ func IsClosed(err error) bool {
 }
 
 func IsCanceled(err error) bool {
-	return IsMulti(err, context.Canceled, context.DeadlineExceeded, errCanceled)
+	return IsMulti(err, context.Canceled, context.DeadlineExceeded)
 }