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golang/io: io.Copy will return an error that contain unexpected fault address when passing io.MultiWriter on darwin #60378

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zyxkad opened this issue May 24, 2023 · 2 comments
Closed

golang/io: io.Copy will return an error that contain unexpected fault address when passing io.MultiWriter on darwin #60378

zyxkad opened this issue May 24, 2023 · 2 comments
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@zyxkad
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zyxkad commented May 24, 2023

What version of Go are you using (go version)?

$ go version
go version go1.20.4 darwin/arm64

Does this issue reproduce with the latest release?

Yes, but can't reproduce on https://play.go.dev

What operating system and processor architecture are you using (go env)?

go env Output
$ go env
GO111MODULE=""
GOARCH="arm64"
GOBIN="/Users/ckpn/Mine/projects/golang/bin"
GOCACHE="/Users/ckpn/Library/Caches/go-build"
GOENV="/Users/ckpn/Library/Application Support/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="arm64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/ckpn/Mine/projects/golang/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/ckpn/Mine/projects/golang"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/opt/homebrew/Cellar/go/1.20.4/libexec"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/opt/homebrew/Cellar/go/1.20.4/libexec/pkg/tool/darwin_arm64"
GOVCS=""
GOVERSION="go1.20.4"
GCCGO="gccgo"
AR="ar"
CC="cc"
CXX="c++"
CGO_ENABLED="1"
GOMOD="/Users/ckpn/Mine/projects/golang/src/github.com/kmcsr/server-installer/go.mod"
GOWORK=""
CGO_CFLAGS="-O2 -g"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-O2 -g"
CGO_FFLAGS="-O2 -g"
CGO_LDFLAGS="-O2 -g"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/3g/rxdhvbj96lv68y35t2cvghkr0000gn/T/go-build1530394242=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

https://go.dev/play/p/66mjQVcjM5X

What did you expect to see?

Program run well

What did you see instead?

unexpected fault address 0x568ea4b30018
fatal error: fault
[signal SIGSEGV: segmentation violation code=0x2 addr=0x568ea4b30018 pc=0x102d59410]

goroutine 1 [running]:
runtime.throw({0x102ed5a84?, 0x102ed9a47?})
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/panic.go:1047 +0x40 fp=0x140001e97c0 sp=0x140001e9790 pc=0x102cce900
runtime.sigpanic()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/signal_unix.go:851 +0x1a8 fp=0x140001e9800 sp=0x140001e97c0 pc=0x102ce51b8
fmt.(*pp).printArg(0x14000116270, {0x568ea4b30008?, 0xd63}, 0x76)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/fmt/print.go:707 +0x1d0 fp=0x140001e98b0 sp=0x140001e9810 pc=0x102d59410
fmt.(*pp).doPrintln(0x14000116270, {0x140001e9ab8?, 0x2, 0x0?})
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/fmt/print.go:1223 +0x3c fp=0x140001e9930 sp=0x140001e98b0 pc=0x102d5d31c
fmt.Fprintln({0x102fd0788, 0x1400000e018}, {0x140001e9ab8, 0x2, 0x2})
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/fmt/print.go:304 +0x44 fp=0x140001e9980 sp=0x140001e9930 pc=0x102d568b4
fmt.Println(...)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/fmt/print.go:314
github.com/kmcsr/server-installer.checkHashStream({0x12a6ad818, 0x14000150180}, 0x140003249f0, {0x102fd0788?, 0x1400000e1d0})
        /Users/ckpn/Mine/projects/golang/src/github.com/kmcsr/server-installer/utils.go:95 +0x5d0 fp=0x140001e9b60 sp=0x140001e9980 pc=0x102ed15e0
github.com/kmcsr/server-installer.downloadAnyAndCheckHashes({0x140000268c0, 0x1, 0x102ed602d?}, 0x6?, {0x14000393500, 0x24})
        /Users/ckpn/Mine/projects/golang/src/github.com/kmcsr/server-installer/utils.go:152 +0x310 fp=0x140001e9cc0 sp=0x140001e9b60 pc=0x102ed1ab0
github.com/kmcsr/server-installer.(*Mrpack).InstallServerWithOptional(0x1400031c240, {0x102f4ec60, 0x1}, 0x102fce7c0)
        /Users/ckpn/Mine/projects/golang/src/github.com/kmcsr/server-installer/mrpack.go:187 +0x480 fp=0x140001e9db0 sp=0x140001e9cc0 pc=0x102ecfd90
github.com/kmcsr/server-installer.(*Mrpack).InstallServer(...)
        /Users/ckpn/Mine/projects/golang/src/github.com/kmcsr/server-installer/mrpack.go:156
main.main()
        /Users/ckpn/Mine/projects/golang/src/github.com/kmcsr/server-installer/cli/main.go:90 +0x514 fp=0x140001e9f70 sp=0x140001e9db0 pc=0x102ed3d74
runtime.main()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:250 +0x248 fp=0x140001e9fd0 sp=0x140001e9f70 pc=0x102cd0f28
runtime.goexit()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/asm_arm64.s:1172 +0x4 fp=0x140001e9fd0 sp=0x140001e9fd0 pc=0x102cffd54

goroutine 2 [force gc (idle)]:
runtime.gopark(0x0?, 0x0?, 0x0?, 0x0?, 0x0?)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:381 +0xe4 fp=0x14000048fa0 sp=0x14000048f80 pc=0x102cd1354
runtime.goparkunlock(...)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:387
runtime.forcegchelper()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:305 +0xb8 fp=0x14000048fd0 sp=0x14000048fa0 pc=0x102cd1198
runtime.goexit()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/asm_arm64.s:1172 +0x4 fp=0x14000048fd0 sp=0x14000048fd0 pc=0x102cffd54
created by runtime.init.6
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:293 +0x24

goroutine 17 [GC sweep wait]:
runtime.gopark(0x0?, 0x0?, 0x0?, 0x0?, 0x0?)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:381 +0xe4 fp=0x14000044760 sp=0x14000044740 pc=0x102cd1354
runtime.goparkunlock(...)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:387
runtime.bgsweep(0x0?)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/mgcsweep.go:278 +0xa4 fp=0x140000447b0 sp=0x14000044760 pc=0x102cbe324
runtime.gcenable.func1()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/mgc.go:178 +0x28 fp=0x140000447d0 sp=0x140000447b0 pc=0x102cb30d8
runtime.goexit()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/asm_arm64.s:1172 +0x4 fp=0x140000447d0 sp=0x140000447d0 pc=0x102cffd54
created by runtime.gcenable
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/mgc.go:178 +0x74

goroutine 18 [GC scavenge wait]:
runtime.gopark(0x1400008c000?, 0x102f4ea58?, 0x1?, 0x0?, 0x0?)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:381 +0xe4 fp=0x14000044f50 sp=0x14000044f30 pc=0x102cd1354
runtime.goparkunlock(...)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:387
runtime.(*scavengerState).park(0x10317fac0)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/mgcscavenge.go:400 +0x5c fp=0x14000044f80 sp=0x14000044f50 pc=0x102cbc1ac
runtime.bgscavenge(0x0?)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/mgcscavenge.go:628 +0x44 fp=0x14000044fb0 sp=0x14000044f80 pc=0x102cbc724
runtime.gcenable.func2()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/mgc.go:179 +0x28 fp=0x14000044fd0 sp=0x14000044fb0 pc=0x102cb3078
runtime.goexit()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/asm_arm64.s:1172 +0x4 fp=0x14000044fd0 sp=0x14000044fd0 pc=0x102cffd54
created by runtime.gcenable
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/mgc.go:179 +0xb8

goroutine 3 [finalizer wait]:
runtime.gopark(0x0?, 0x0?, 0x0?, 0x0?, 0x0?)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:381 +0xe4 fp=0x14000049580 sp=0x14000049560 pc=0x102cd1354
runtime.runfinq()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/mfinal.go:193 +0x10c fp=0x140000497d0 sp=0x14000049580 pc=0x102cb216c
runtime.goexit()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/asm_arm64.s:1172 +0x4 fp=0x140000497d0 sp=0x140000497d0 pc=0x102cffd54
created by runtime.createfing
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/mfinal.go:163 +0x84

goroutine 12 [select]:
runtime.gopark(0x14000106f80?, 0x2?, 0xa0?, 0x21?, 0x14000106f24?)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:381 +0xe4 fp=0x14000106db0 sp=0x14000106d90 pc=0x102cd1354
runtime.selectgo(0x14000106f80, 0x14000106f20, 0x14000026640?, 0x0, 0x140003ee180?, 0x1)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/select.go:327 +0x690 fp=0x14000106ed0 sp=0x14000106db0 pc=0x102ce1630
net/http.(*persistConn).writeLoop(0x1400015a000)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/http/transport.go:2410 +0x9c fp=0x14000106fb0 sp=0x14000106ed0 pc=0x102eabfec
net/http.(*Transport).dialConn.func6()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/http/transport.go:1766 +0x28 fp=0x14000106fd0 sp=0x14000106fb0 pc=0x102ea8cf8
runtime.goexit()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/asm_arm64.s:1172 +0x4 fp=0x14000106fd0 sp=0x14000106fd0 pc=0x102cffd54
created by net/http.(*Transport).dialConn
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/http/transport.go:1766 +0x1214

goroutine 22 [IO wait]:
runtime.gopark(0xffffffffffffffff?, 0xffffffffffffffff?, 0x23?, 0x0?, 0x102d348b0?)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:381 +0xe4 fp=0x14000123580 sp=0x14000123560 pc=0x102cd1354
runtime.netpollblock(0x0?, 0x0?, 0x0?)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/netpoll.go:527 +0x158 fp=0x140001235c0 sp=0x14000123580 pc=0x102ccaa08
internal/poll.runtime_pollWait(0x12a6f1938, 0x72)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/netpoll.go:306 +0xa0 fp=0x140001235f0 sp=0x140001235c0 pc=0x102cfa0c0
internal/poll.(*pollDesc).wait(0x14000182100?, 0x140000c6000?, 0x0)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/internal/poll/fd_poll_runtime.go:84 +0x28 fp=0x14000123620 sp=0x140001235f0 pc=0x102d496f8
internal/poll.(*pollDesc).waitRead(...)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/internal/poll/fd_poll_runtime.go:89
internal/poll.(*FD).Read(0x14000182100, {0x140000c6000, 0xd80, 0xd80})
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/internal/poll/fd_unix.go:167 +0x200 fp=0x140001236c0 sp=0x14000123620 pc=0x102d4a400
net.(*netFD).Read(0x14000182100, {0x140000c6000?, 0x14000123878?, 0x102e396ac?})
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/fd_posix.go:55 +0x28 fp=0x14000123710 sp=0x140001236c0 pc=0x102e061e8
net.(*conn).Read(0x1400009a000, {0x140000c6000?, 0x10319bbe0?, 0x1?})
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/net.go:183 +0x34 fp=0x14000123760 sp=0x14000123710 pc=0x102e10174
net.(*TCPConn).Read(0x140001237d8?, {0x140000c6000?, 0x140003dd4a0?, 0x18?})
        <autogenerated>:1 +0x2c fp=0x14000123790 sp=0x14000123760 pc=0x102e1aa0c
crypto/tls.(*atLeastReader).Read(0x140003dd4a0, {0x140000c6000?, 0x140003dd4a0?, 0x0?})
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/crypto/tls/conn.go:788 +0x40 fp=0x140001237e0 sp=0x14000123790 pc=0x102e3ae90
bytes.(*Buffer).ReadFrom(0x1400009e290, {0x102fd0068, 0x140003dd4a0})
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/bytes/buffer.go:202 +0x90 fp=0x14000123840 sp=0x140001237e0 pc=0x102d6ba30
crypto/tls.(*Conn).readFromUntil(0x1400009e000, {0x12a66bfc8?, 0x1400009a000}, 0x102e7376c?)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/crypto/tls/conn.go:810 +0xd4 fp=0x14000123880 sp=0x14000123840 pc=0x102e3b084
crypto/tls.(*Conn).readRecordOrCCS(0x1400009e000, 0x0)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/crypto/tls/conn.go:617 +0xd8 fp=0x14000123bf0 sp=0x14000123880 pc=0x102e38ed8
crypto/tls.(*Conn).readRecord(...)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/crypto/tls/conn.go:583
crypto/tls.(*Conn).Read(0x1400009e000, {0x140000f7000, 0x1000, 0x102e86fe8?})
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/crypto/tls/conn.go:1316 +0x178 fp=0x14000123c60 sp=0x14000123bf0 pc=0x102e3de28
bufio.(*Reader).Read(0x140000f2540, {0x140000e44a0, 0x9, 0x102ca123c?})
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/bufio/bufio.go:237 +0x1e0 fp=0x14000123ca0 sp=0x14000123c60 pc=0x102d6dc10
io.ReadAtLeast({0x102fcff28, 0x140000f2540}, {0x140000e44a0, 0x9, 0x9}, 0x9)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/io/io.go:332 +0xa0 fp=0x14000123cf0 sp=0x14000123ca0 pc=0x102d2ca20
io.ReadFull(...)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/io/io.go:351
net/http.http2readFrameHeader({0x140000e44a0?, 0x9?, 0x14000123d98?}, {0x102fcff28?, 0x140000f2540?})
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/http/h2_bundle.go:1567 +0x58 fp=0x14000123d40 sp=0x14000123cf0 pc=0x102e80688
net/http.(*http2Framer).ReadFrame(0x140000e4460)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/http/h2_bundle.go:1831 +0x84 fp=0x14000123df0 sp=0x14000123d40 pc=0x102e80dc4
net/http.(*http2clientConnReadLoop).run(0x14000123f88)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/http/h2_bundle.go:9187 +0xfc fp=0x14000123f40 sp=0x14000123df0 pc=0x102e9120c
net/http.(*http2ClientConn).readLoop(0x1400009c180)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/http/h2_bundle.go:9082 +0x5c fp=0x14000123fb0 sp=0x14000123f40 pc=0x102e906cc
net/http.(*http2Transport).newClientConn.func1()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/http/h2_bundle.go:7779 +0x28 fp=0x14000123fd0 sp=0x14000123fb0 pc=0x102e8a2a8
runtime.goexit()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/asm_arm64.s:1172 +0x4 fp=0x14000123fd0 sp=0x14000123fd0 pc=0x102cffd54
created by net/http.(*http2Transport).newClientConn
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/http/h2_bundle.go:7779 +0xad0

goroutine 11 [select]:
runtime.gopark(0x14000102f58?, 0x4?, 0xe0?, 0x57?, 0x14000102d98?)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/proc.go:381 +0xe4 fp=0x14000102c00 sp=0x14000102be0 pc=0x102cd1354
runtime.selectgo(0x14000102f58, 0x14000102d90, 0x1400012c180?, 0x0, 0x1400004a501?, 0x1)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/select.go:327 +0x690 fp=0x14000102d20 sp=0x14000102c00 pc=0x102ce1630
net/http.(*persistConn).readLoop(0x1400015a000)
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/http/transport.go:2227 +0xbec fp=0x14000102fb0 sp=0x14000102d20 pc=0x102eab05c
net/http.(*Transport).dialConn.func5()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/http/transport.go:1765 +0x28 fp=0x14000102fd0 sp=0x14000102fb0 pc=0x102ea8d58
runtime.goexit()
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/runtime/asm_arm64.s:1172 +0x4 fp=0x14000102fd0 sp=0x14000102fd0 pc=0x102cffd54
created by net/http.(*Transport).dialConn
        /opt/homebrew/Cellar/go/1.20.4/libexec/src/net/http/transport.go:1765 +0x11c8
exit status 2
@randall77
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copy(writers, ([]io.Writer)((unsafe.Pointer)(&hashers)))

This is incorrect. You cannot copy a []hash.Hash to a []io.Writer. You will have to iterate and assign each element individually.

https://go.dev/doc/faq#convert_slice_with_same_underlying_type

If you fix that and still see problems, please reopen.

@zyxkad
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zyxkad commented May 24, 2023

Yeah it works, thanks very much

@golang golang locked and limited conversation to collaborators May 23, 2024
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@randall77 @gopherbot @zyxkad