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/ptrace.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.
+
+package linux
+
+// ptrace commands from include/uapi/linux/ptrace.h.
+const (
+	PTRACE_TRACEME              = 0
+	PTRACE_PEEKTEXT             = 1
+	PTRACE_PEEKDATA             = 2
+	PTRACE_PEEKUSR              = 3
+	PTRACE_POKETEXT             = 4
+	PTRACE_POKEDATA             = 5
+	PTRACE_POKEUSR              = 6
+	PTRACE_CONT                 = 7
+	PTRACE_KILL                 = 8
+	PTRACE_SINGLESTEP           = 9
+	PTRACE_ATTACH               = 16
+	PTRACE_DETACH               = 17
+	PTRACE_SYSCALL              = 24
+	PTRACE_SETOPTIONS           = 0x4200
+	PTRACE_GETEVENTMSG          = 0x4201
+	PTRACE_GETSIGINFO           = 0x4202
+	PTRACE_SETSIGINFO           = 0x4203
+	PTRACE_GETREGSET            = 0x4204
+	PTRACE_SETREGSET            = 0x4205
+	PTRACE_SEIZE                = 0x4206
+	PTRACE_INTERRUPT            = 0x4207
+	PTRACE_LISTEN               = 0x4208
+	PTRACE_PEEKSIGINFO          = 0x4209
+	PTRACE_GETSIGMASK           = 0x420a
+	PTRACE_SETSIGMASK           = 0x420b
+	PTRACE_SECCOMP_GET_FILTER   = 0x420c
+	PTRACE_SECCOMP_GET_METADATA = 0x420d
+)
+
+// ptrace commands from arch/x86/include/uapi/asm/ptrace-abi.h.
+const (
+	PTRACE_GETREGS           = 12
+	PTRACE_SETREGS           = 13
+	PTRACE_GETFPREGS         = 14
+	PTRACE_SETFPREGS         = 15
+	PTRACE_GETFPXREGS        = 18
+	PTRACE_SETFPXREGS        = 19
+	PTRACE_OLDSETOPTIONS     = 21
+	PTRACE_GET_THREAD_AREA   = 25
+	PTRACE_SET_THREAD_AREA   = 26
+	PTRACE_ARCH_PRCTL        = 30
+	PTRACE_SYSEMU            = 31
+	PTRACE_SYSEMU_SINGLESTEP = 32
+	PTRACE_SINGLEBLOCK       = 33
+)
+
+// ptrace event codes from include/uapi/linux/ptrace.h.
+const (
+	PTRACE_EVENT_FORK       = 1
+	PTRACE_EVENT_VFORK      = 2
+	PTRACE_EVENT_CLONE      = 3
+	PTRACE_EVENT_EXEC       = 4
+	PTRACE_EVENT_VFORK_DONE = 5
+	PTRACE_EVENT_EXIT       = 6
+	PTRACE_EVENT_SECCOMP    = 7
+	PTRACE_EVENT_STOP       = 128
+)
+
+// PTRACE_SETOPTIONS options from include/uapi/linux/ptrace.h.
+const (
+	PTRACE_O_TRACESYSGOOD    = 1
+	PTRACE_O_TRACEFORK       = 1 << PTRACE_EVENT_FORK
+	PTRACE_O_TRACEVFORK      = 1 << PTRACE_EVENT_VFORK
+	PTRACE_O_TRACECLONE      = 1 << PTRACE_EVENT_CLONE
+	PTRACE_O_TRACEEXEC       = 1 << PTRACE_EVENT_EXEC
+	PTRACE_O_TRACEVFORKDONE  = 1 << PTRACE_EVENT_VFORK_DONE
+	PTRACE_O_TRACEEXIT       = 1 << PTRACE_EVENT_EXIT
+	PTRACE_O_TRACESECCOMP    = 1 << PTRACE_EVENT_SECCOMP
+	PTRACE_O_EXITKILL        = 1 << 20
+	PTRACE_O_SUSPEND_SECCOMP = 1 << 21
+)
+
+// YAMA ptrace_scope levels from security/yama/yama_lsm.c.
+const (
+	YAMA_SCOPE_DISABLED   = 0
+	YAMA_SCOPE_RELATIONAL = 1
+)