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/abi/linux/ipc.go

@@ -0,0 +1,61 @@
+// 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 linux
+
+// Control commands used with semctl, shmctl, and msgctl.
+//
+// Source: include/uapi/linux/ipc.h.
+const (
+	IPC_RMID = 0
+	IPC_SET  = 1
+	IPC_STAT = 2
+	IPC_INFO = 3
+)
+
+// Resource get request flags.
+//
+// Source: include/uapi/linux/ipc.h
+const (
+	IPC_CREAT  = 0o0001000
+	IPC_EXCL   = 0o0002000
+	IPC_NOWAIT = 0o0004000
+)
+
+// IPC flags.
+const (
+	IPC_PRIVATE = 0
+)
+
+// In Linux, amd64 does not enable CONFIG_ARCH_WANT_IPC_PARSE_VERSION, so SysV
+// IPC unconditionally uses the "new" 64-bit structures that are needed for
+// features like 32-bit UIDs.
+
+// IPCPerm is equivalent to struct ipc64_perm.
+//
+// +marshal
+type IPCPerm struct {
+	Key     uint32
+	UID     uint32
+	GID     uint32
+	CUID    uint32
+	CGID    uint32
+	Mode    uint16
+	_       uint16
+	Seq     uint16
+	_       uint16
+	_       uint32
+	unused1 uint64
+	unused2 uint64
+}