syscall: accept(2) syscall blocked on Android, use accept4(2) instead #45767
Description
What version of Go are you using (go version)?
go version go1.15.11 linux/amd64
Does this issue reproduce with the latest release?
yes
What operating system and processor architecture are you using (go env)?
GO111MODULE="on"
GOARCH="amd64"
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPRIVATE=""
GOPROXY="https://goproxy.io,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.google.cn"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/dev/null"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build729311614=/tmp/go-build -gno-record-gcc-switches"
What did you do?
import (
"net"
"strconv"
"strings"
"time"
)
type NetDemoApi struct {
}
func (nda *NetDemoApi) Run(serverAddr string, localPort int) error {
var localIP string
if conn, e := net.DialTimeout("tcp4", serverAddr, 3*time.Second); e == nil {
localIP = conn.LocalAddr().String()
conn.Close()
if idx := strings.LastIndexByte(localIP, ':'); idx >= 0 {
localIP = localIP[:idx]
}
} else
{
return e
}
addr := net.JoinHostPort(localIP, strconv.Itoa(localPort))
ln, err := net.Listen("tcp", addr)
if err != nil {
return err
}
go func() {
_, err := ln.Accept()
if err != nil {
return
}
}()
time.Sleep(time.Second * 60)
return nil
}
I use gomobile to build aar with above code, then use this aar in app. When app running, I turn off the wifi, then app crash.
2021-04-26 14:26:16.276 30002-30002/? A/DEBUG: *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
2021-04-26 14:26:16.277 30002-30002/? A/DEBUG: Build fingerprint: 'HUAWEI/EML-AL00/HWEML:10/HUAWEIEML-AL00/10.0.0.156C00:user/release-keys'
2021-04-26 14:26:16.277 30002-30002/? A/DEBUG: Revision: '0'
2021-04-26 14:26:16.277 30002-30002/? A/DEBUG: ABI: 'arm64'
2021-04-26 14:26:16.277 1257-4257/system_process I/chatty: uid=1000(system) Binder:1257_13 expire 1 line
2021-04-26 14:26:16.277 30002-30002/? A/DEBUG: SYSVMTYPE: Maple
APPVMTYPE: Art
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: Timestamp: 2021-04-26 14:26:16+0800
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: pid: 29812, tid: 29872, name: Thread-2 >>> org.golang.example.android <<<
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: uid: 10001
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: signal 31 (SIGSYS), code 1 (SYS_SECCOMP), fault addr --------
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: Cause: seccomp prevented call to disallowed arm64 system call 202
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: x0 0000000000000056 x1 000000400002c498 x2 000000400002c478 x3 0000000000000000
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: x4 0000000000000000 x5 0000000000000000 x6 0000000000000001 x7 00000000016944e8
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: x8 00000000000000ca x9 000ee6b280000000 x10 000000000001abdc x11 000000000f92b524
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: x12 0000000000000016 x13 0000000060865d08 x14 0001dac7eb968cd3 x15 0000088991354fbd
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: x16 000000774d609ac8 x17 0000000000000000 x18 000000774703c000 x19 0000000000000030
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: x20 000000400002c4f8 x21 000000774d869cc0 x22 0000000000000001 x23 000000774d8995b5
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: x24 000000774d8691b0 x25 0000000000000018 x26 000000774d7c0120 x27 0000000000000000
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: x28 0000004000000180 x29 0000000000000000
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: sp 000000400002c3d0 lr 000000774d6f7ac8 pc 000000774d6f7ae8
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: backtrace:
2021-04-26 14:26:16.278 30002-30002/? A/DEBUG: #00 pc 00000000000e9ae8 /data/app/org.golang.example.android-mzk5Nz7vrkXGh6877_slNQ==/lib/arm64/libgojni.so