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/clone.go

@@ -0,0 +1,71 @@
+// 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
+
+// Clone constants per clone(2).
+const (
+	CSIGNAL = 0xff
+
+	CLONE_VM             = 0x100
+	CLONE_FS             = 0x200
+	CLONE_FILES          = 0x400
+	CLONE_SIGHAND        = 0x800
+	CLONE_PIDFD          = 0x1000
+	CLONE_PTRACE         = 0x2000
+	CLONE_VFORK          = 0x4000
+	CLONE_PARENT         = 0x8000
+	CLONE_THREAD         = 0x10000
+	CLONE_NEWNS          = 0x20000
+	CLONE_SYSVSEM        = 0x40000
+	CLONE_SETTLS         = 0x80000
+	CLONE_PARENT_SETTID  = 0x100000
+	CLONE_CHILD_CLEARTID = 0x200000
+	CLONE_DETACHED       = 0x400000
+	CLONE_UNTRACED       = 0x800000
+	CLONE_CHILD_SETTID   = 0x1000000
+	CLONE_NEWCGROUP      = 0x2000000
+	CLONE_NEWUTS         = 0x4000000
+	CLONE_NEWIPC         = 0x8000000
+	CLONE_NEWUSER        = 0x10000000
+	CLONE_NEWPID         = 0x20000000
+	CLONE_NEWNET         = 0x40000000
+	CLONE_IO             = 0x80000000
+
+	// Only passable via clone3(2).
+	CLONE_CLEAR_SIGHAND = 0x100000000
+	CLONE_INTO_CGROUP   = 0x200000000
+
+	// Sizeof first published struct.
+	CLONE_ARGS_SIZE_VER0 = 64
+	// Sizeof third published struct.
+	CLONE_ARGS_SIZE_VER2 = 88
+)
+
+// CloneArgs is struct clone_args, from include/uapi/linux/sched.h.
+//
+// +marshal
+type CloneArgs struct {
+	Flags      uint64
+	Pidfd      uint64
+	ChildTID   uint64
+	ParentTID  uint64
+	ExitSignal uint64
+	Stack      uint64
+	StackSize  uint64
+	TLS        uint64
+	SetTID     uint64
+	SetTIDSize uint64
+	Cgroup     uint64
+}