snapshot: sagernet/gvisor v0.0.0-20250811.0-sing-box-mod.1

Содержимое пина, зафиксированного в go.mod sing-box-lx, одним коммитом
без истории. Полная история SagerNet/gvisor — 1.45 ГБ и клонируется в
каждой CI-джобе; наша дельта — одна вставка в одну функцию, история для
неё не нужна.

Module path github.com/sagernet/gvisor сохранён намеренно: на него
опирается replace-директива суперпроекта.

Патч поверх — отдельным коммитом, чтобы дельта читалась одним git show
и переносилась на новый пин копированием.

SPECS/TASKS/048-GVISOR_HANDSHAKE_NIL_CRASH

pkg/tcpip/transport/tcp/segment_state.go

@@ -0,0 +1,35 @@
+// Copyright 2018 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcp
+
+import (
+	"context"
+)
+
+// saveOptions is invoked by stateify.
+func (s *segment) saveOptions() []byte {
+	// We cannot save s.options directly as it may point to s.data's trimmed
+	// tail, which is not allowed by state framework (in-struct pointer).
+	b := make([]byte, 0, cap(s.options))
+	return append(b, s.options...)
+}
+
+// loadOptions is invoked by stateify.
+func (s *segment) loadOptions(_ context.Context, options []byte) {
+	// NOTE: We cannot point s.options back into s.data's trimmed tail. But
+	// it is OK as they do not need to aliased. Plus, options is already
+	// allocated so there is no cost here.
+	s.options = options
+}