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/utsname.go

@@ -0,0 +1,51 @@
+// 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
+
+import (
+	"bytes"
+	"fmt"
+)
+
+const (
+	// UTSLen is the maximum length of strings contained in fields of
+	// UtsName.
+	UTSLen = 64
+)
+
+// UtsName represents struct utsname, the struct returned by uname(2).
+//
+// +marshal
+type UtsName struct {
+	Sysname    [UTSLen + 1]byte
+	Nodename   [UTSLen + 1]byte
+	Release    [UTSLen + 1]byte
+	Version    [UTSLen + 1]byte
+	Machine    [UTSLen + 1]byte
+	Domainname [UTSLen + 1]byte
+}
+
+// utsNameString converts a UtsName entry to a string without NULs.
+func utsNameString(s [UTSLen + 1]byte) string {
+	// The NUL bytes will remain even in a cast to string. We must
+	// explicitly strip them.
+	return string(bytes.TrimRight(s[:], "\x00"))
+}
+
+func (u UtsName) String() string {
+	return fmt.Sprintf("{Sysname: %s, Nodename: %s, Release: %s, Version: %s, Machine: %s, Domainname: %s}",
+		utsNameString(u.Sysname), utsNameString(u.Nodename), utsNameString(u.Release),
+		utsNameString(u.Version), utsNameString(u.Machine), utsNameString(u.Domainname))
+}