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/packet/endpoint_state.go

@@ -0,0 +1,74 @@
+// 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 packet
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/sagernet/gvisor/pkg/tcpip"
+	"github.com/sagernet/gvisor/pkg/tcpip/stack"
+)
+
+// saveReceivedAt is invoked by stateify.
+func (p *packet) saveReceivedAt() int64 {
+	return p.receivedAt.UnixNano()
+}
+
+// loadReceivedAt is invoked by stateify.
+func (p *packet) loadReceivedAt(_ context.Context, nsec int64) {
+	p.receivedAt = time.Unix(0, nsec)
+}
+
+// beforeSave is invoked by stateify.
+func (ep *endpoint) beforeSave() {
+	ep.rcvMu.Lock()
+	ep.rcvDisabled = true
+	ep.rcvMu.Unlock()
+	ep.stack.RegisterResumableEndpoint(ep)
+}
+
+// afterLoad is invoked by stateify.
+func (ep *endpoint) afterLoad(ctx context.Context) {
+	if !ep.stack.IsSaveRestoreEnabled() {
+		ep.mu.Lock()
+		ep.stack = stack.RestoreStackFromContext(ctx)
+		ep.mu.Unlock()
+	}
+	ep.stack.RegisterRestoredEndpoint(ep)
+}
+
+// Restore implements tcpip.RestoredEndpoint.Restore.
+func (ep *endpoint) Restore(_ *stack.Stack) {
+	ep.mu.Lock()
+	defer ep.mu.Unlock()
+
+	ep.ops.InitHandler(ep, ep.stack, tcpip.GetStackSendBufferLimits, tcpip.GetStackReceiveBufferLimits)
+	if err := ep.stack.RegisterPacketEndpoint(ep.boundNIC, ep.boundNetProto, ep); err != nil {
+		panic(fmt.Sprintf("RegisterPacketEndpoint(%d, %d, _): %s", ep.boundNIC, ep.boundNetProto, err))
+	}
+
+	ep.rcvMu.Lock()
+	ep.rcvDisabled = false
+	ep.rcvMu.Unlock()
+}
+
+// Resume implements tcpip.ResumableEndpoint.Resume.
+func (ep *endpoint) Resume() {
+	ep.rcvMu.Lock()
+	defer ep.rcvMu.Unlock()
+	ep.rcvDisabled = false
+}