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/syserr/host_linux.go

@@ -0,0 +1,95 @@
+// 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.
+
+//go:build linux
+// +build linux
+
+package syserr
+
+import (
+	"fmt"
+
+	"github.com/sagernet/gvisor/pkg/abi/linux/errno"
+	"golang.org/x/sys/unix"
+)
+
+const maxErrno = 134
+
+var linuxHostTranslations [maxErrno]*Error
+
+func getHostTranslation(err unix.Errno) *Error {
+	if uint64(err) >= uint64(len(linuxHostTranslations)) {
+		return nil
+	}
+	return linuxHostTranslations[err]
+}
+
+func addHostTranslation(host unix.Errno, trans *Error) {
+	if linuxHostTranslations[host] != nil {
+		panic(fmt.Sprintf("duplicate translation for host errno %q (%d)", host.Error(), host))
+	}
+	linuxHostTranslations[host] = trans
+}
+
+// TODO(b/34162363): Remove or replace most of these errors.
+//
+// Some of the errors should be replaced with package specific errors and
+// others should be removed entirely.
+var (
+	ErrDeadlock                  = newWithHost("resource deadlock would occur", errno.EDEADLOCK, unix.EDEADLOCK)
+	ErrChannelOutOfRange         = newWithHost("channel number out of range", errno.ECHRNG, unix.ECHRNG)
+	ErrLevelTwoNotSynced         = newWithHost("level 2 not synchronized", errno.EL2NSYNC, unix.EL2NSYNC)
+	ErrLevelThreeHalted          = newWithHost("level 3 halted", errno.EL3HLT, unix.EL3HLT)
+	ErrLevelThreeReset           = newWithHost("level 3 reset", errno.EL3RST, unix.EL3RST)
+	ErrLinkNumberOutOfRange      = newWithHost("link number out of range", errno.ELNRNG, unix.ELNRNG)
+	ErrProtocolDriverNotAttached = newWithHost("protocol driver not attached", errno.EUNATCH, unix.EUNATCH)
+	ErrNoCSIAvailable            = newWithHost("no CSI structure available", errno.ENOCSI, unix.ENOCSI)
+	ErrLevelTwoHalted            = newWithHost("level 2 halted", errno.EL2HLT, unix.EL2HLT)
+	ErrInvalidExchange           = newWithHost("invalid exchange", errno.EBADE, unix.EBADE)
+	ErrInvalidRequestDescriptor  = newWithHost("invalid request descriptor", errno.EBADR, unix.EBADR)
+	ErrExchangeFull              = newWithHost("exchange full", errno.EXFULL, unix.EXFULL)
+	ErrNoAnode                   = newWithHost("no anode", errno.ENOANO, unix.ENOANO)
+	ErrInvalidRequestCode        = newWithHost("invalid request code", errno.EBADRQC, unix.EBADRQC)
+	ErrInvalidSlot               = newWithHost("invalid slot", errno.EBADSLT, unix.EBADSLT)
+	ErrBadFontFile               = newWithHost("bad font file format", errno.EBFONT, unix.EBFONT)
+	ErrMachineNotOnNetwork       = newWithHost("machine is not on the network", errno.ENONET, unix.ENONET)
+	ErrPackageNotInstalled       = newWithHost("package not installed", errno.ENOPKG, unix.ENOPKG)
+	ErrAdvertise                 = newWithHost("advertise error", errno.EADV, unix.EADV)
+	ErrSRMount                   = newWithHost("srmount error", errno.ESRMNT, unix.ESRMNT)
+	ErrSendCommunication         = newWithHost("communication error on send", errno.ECOMM, unix.ECOMM)
+	ErrRFS                       = newWithHost("RFS specific error", errno.EDOTDOT, unix.EDOTDOT)
+	ErrNetworkNameNotUnique      = newWithHost("name not unique on network", errno.ENOTUNIQ, unix.ENOTUNIQ)
+	ErrFDInBadState              = newWithHost("file descriptor in bad state", errno.EBADFD, unix.EBADFD)
+	ErrRemoteAddressChanged      = newWithHost("remote address changed", errno.EREMCHG, unix.EREMCHG)
+	ErrSharedLibraryInaccessible = newWithHost("can not access a needed shared library", errno.ELIBACC, unix.ELIBACC)
+	ErrCorruptedSharedLibrary    = newWithHost("accessing a corrupted shared library", errno.ELIBBAD, unix.ELIBBAD)
+	ErrLibSectionCorrupted       = newWithHost(".lib section in a.out corrupted", errno.ELIBSCN, unix.ELIBSCN)
+	ErrTooManySharedLibraries    = newWithHost("attempting to link in too many shared libraries", errno.ELIBMAX, unix.ELIBMAX)
+	ErrSharedLibraryExeced       = newWithHost("cannot exec a shared library directly", errno.ELIBEXEC, unix.ELIBEXEC)
+	ErrShouldRestart             = newWithHost("interrupted system call should be restarted", errno.ERESTART, unix.ERESTART)
+	ErrStreamPipe                = newWithHost("streams pipe error", errno.ESTRPIPE, unix.ESTRPIPE)
+	ErrStructureNeedsCleaning    = newWithHost("structure needs cleaning", errno.EUCLEAN, unix.EUCLEAN)
+	ErrIsNotNamedFile            = newWithHost("not a XENIX named type file", errno.ENOTNAM, unix.ENOTNAM)
+	ErrNotAvailable              = newWithHost("no XENIX semaphores available", errno.ENAVAIL, unix.ENAVAIL)
+	ErrIsNamedFile               = newWithHost("is a named type file", errno.EISNAM, unix.EISNAM)
+	ErrRemoteIO                  = newWithHost("remote I/O error", errno.EREMOTEIO, unix.EREMOTEIO)
+	ErrNoMedium                  = newWithHost("no medium found", errno.ENOMEDIUM, unix.ENOMEDIUM)
+	ErrWrongMediumType           = newWithHost("wrong medium type", errno.EMEDIUMTYPE, unix.EMEDIUMTYPE)
+	ErrNoKey                     = newWithHost("required key not available", errno.ENOKEY, unix.ENOKEY)
+	ErrKeyExpired                = newWithHost("key has expired", errno.EKEYEXPIRED, unix.EKEYEXPIRED)
+	ErrKeyRevoked                = newWithHost("key has been revoked", errno.EKEYREVOKED, unix.EKEYREVOKED)
+	ErrKeyRejected               = newWithHost("key was rejected by service", errno.EKEYREJECTED, unix.EKEYREJECTED)
+	ErrRFKill                    = newWithHost("operation not possible due to RF-kill", errno.ERFKILL, unix.ERFKILL)
+	ErrHwPoison                  = newWithHost("memory page has hardware error", errno.EHWPOISON, unix.EHWPOISON)
+)