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cmd/go: go get Segmentation Fault after using setfacl #13586

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orian opened this issue Dec 11, 2015 · 10 comments
Closed

cmd/go: go get Segmentation Fault after using setfacl #13586

orian opened this issue Dec 11, 2015 · 10 comments
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FrozenDueToAge OS-Linux
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@orian
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orian commented Dec 11, 2015

The following script allows to replicate the environment.

#!/bin/bash

FP=/tmp2/$USER/raid/$USER
sudo mkdir -p $FP
sudo chmod 755 /tmp2
sudo chmod 750 /tmp2/$USER
sudo setfacl -m user:$USER:r-x /tmp2/$USER
sudo chmod 705 /tmp2/$USER/raid
sudo chmod 755 $FP
sudo chown $USER.$USER $FP
export GOPATH=$FP/gopath
go get google.golang.org/grpc

The failures I got were:

unexpected fault address 0x0
fatal error: fault
[signal 0xb code=0x80 addr=0x0]

goroutine 25 [running]:
Segmentation fault (core dumped)

or

fatal error: unexpected signal during runtime execution
[signal 0xb code=0x80 addr=0x0]

goroutine 25 [running]:
Segmentation fault (core dumped)

or just

Segmentation fault (core dumped)

Now the funny part:
I've rerun the tool many times in hope for some more useful error, and probably after 10th run it run successfully. I guess it means some race condition?

System: Linux; Ubuntu 15.04; filesystem: ext4
Kernel: Linux xx 3.19.0-30-generic #33-Ubuntu SMP Mon Sep 21 20:58:04 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Go: 1.4.2 and 1.5.2 (both from golang.org)
@ianlancetaylor
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What comment are you running when you see the crash? It's not clear.

Can you provide a complete crash dump?

Have you tried using the race detector?

@ianlancetaylor
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Are you saying that running go get gives you a segmentation fault?

@orian
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orian commented Dec 12, 2015

Yes, sorry for not being specific. Running go get causes problem:

go get google.golang.org/grpc

@ianlancetaylor
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Can you provide the complete crash output?

@ianlancetaylor ianlancetaylor changed the title go get Segmentation Fault cmd/go: go get Segmentation Fault after using setfacl Dec 12, 2015
@ianlancetaylor ianlancetaylor added this to the Unplanned milestone Dec 12, 2015
@ianlancetaylor
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I tried following your instructions, and was unable to recreate the problem. I tried both go tip and the Go 1.5.2 release.

@orian
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orian commented Dec 12, 2015

The above output is everything i've got, from time to time also (go 1.5.2):

munmap of stack space failed: errno 22
Aborted

reflect.kind.N13_reflect.Value
    ../../../src/libgo/go/reflect/value.go:74
reflect.Len.N13_reflect.Value
    ../../../src/libgo/go/reflect/value.go:870
reflect.Copy
    ../../../src/libgo/go/reflect/value.go:1711
asn1.parseField
    ../../../src/libgo/go/encoding/asn1/asn1.go:700
asn1.parseField
    ../../../src/libgo/go/encoding/asn1/asn1.go:778
asn1.parseField
    ../../../src/libgo/go/encoding/asn1/asn1.go:778
asn1.parseField
    ../../../src/libgo/go/encoding/asn1/asn1.go:778
encoding_asn1.UnmarshalWithParams
    ../../../src/libgo/go/encoding/asn1/asn1.go:917
encoding_asn1.Unmarshal
    ../../../src/libgo/go/encoding/asn1/asn1.go:910
crypto_x509.ParseCertificate
    ../../../src/libgo/go/crypto/x509/x509.go:1093
crypto_x509.AppendCertsFromPEM.pN20_crypto_x509.CertPool
    ../../../src/libgo/go/crypto/x509/cert_pool.go:96
x509.initSystemRoots
    ../../../src/libgo/go/crypto/x509/root_unix.go:38
sync.Do.pN9_sync.Once
    ../../../src/libgo/go/sync/once.go:44
x509.systemRootsPool
    ../../../src/libgo/go/crypto/x509/root.go:15
crypto_x509.Verify.pN23_crypto_x509.Certificate
    ../../../src/libgo/go/crypto/x509/verify.go:219
crypto_tls.doFullHandshake.pN31_crypto_tls.clientHandshakeState
    ../../../src/libgo/go/crypto/tls/handshake_client.go:262
crypto_tls.clientHandshake.pN15_crypto_tls.Conn
    ../../../src/libgo/go/crypto/tls/handshake_client.go:197
crypto_tls.Handshake.pN15_crypto_tls.Conn
    ../../../src/libgo/go/crypto/tls/conn.go:977
http.$nested21
    ../../../src/libgo/go/net/http/transport.go:637

goroutine 16 [select]:
net_http.getConn.pN18_net_http.Transport
    ../../../src/libgo/go/net/http/transport.go:525
net_http.RoundTrip.pN18_net_http.Transport
    ../../../src/libgo/go/net/http/transport.go:228
http.send
    ../../../src/libgo/go/net/http/client.go:219
net_http.send.pN15_net_http.Client
    ../../../src/libgo/go/net/http/client.go:142
net_http.doFollowingRedirects.pN15_net_http.Client
    ../../../src/libgo/go/net/http/client.go:367
net_http.Get.pN15_net_http.Client
    ../../../src/libgo/go/net/http/client.go:299
main.$nested15
    ../../src/gotools/../libgo/go/cmd/go/http.go:57
main.httpsOrHTTP
    ../../src/gotools/../libgo/go/cmd/go/http.go:65
main.repoRootForImportDynamic
    ../../src/gotools/../libgo/go/cmd/go/vcs.go:592
main.repoRootForImportPath
    ../../src/gotools/../libgo/go/cmd/go/vcs.go:482
main.downloadPackage
    ../../src/gotools/../libgo/go/cmd/go/get.go:301
main.download
    ../../src/gotools/../libgo/go/cmd/go/get.go:179
main.runGet
    ../../src/gotools/../libgo/go/cmd/go/get.go:79
main.main
    ../../src/gotools/../libgo/go/cmd/go/main.go:163
created by main
    ../../../src/libgo/runtime/go-main.c:42

goroutine 18 [finalizer wait]:
created by runtime_createfing
    ../../../src/libgo/runtime/mgc0.c:2572

goroutine 19 [syscall]:
    goroutine in C code; stack unavailable
created by os_signal..import
    ../../../src/libgo/go/os/signal/signal_unix.go:25

goroutine 22 [chan receive]:
net_http.dialConn.pN18_net_http.Transport
    ../../../src/libgo/go/net/http/transport.go:643
http.$nested18
    ../../../src/libgo/go/net/http/transport.go:520
created by net_http.getConn.pN18_net_http.Transport
    ../../../src/libgo/go/net/http/transport.go:519
end

and go 1.4.2:

fatal error: unexpected signal during runtime execution
[signal 0xb code=0x1 addr=0x9]

runtime stack:
runtime_dopanic
    ../../../src/libgo/runtime/panic.c:135
runtime_throw
    ../../../src/libgo/runtime/panic.c:193
sig_panic_leadin
    ../../../src/libgo/runtime/go-signal.c:247
sig_panic_info_handler
    ../../../src/libgo/runtime/go-signal.c:281

    :0
__splitstack_find
    ../../../src/libgcc/generic-morestack.c:905
addstackroots
    ../../../src/libgo/runtime/mgc0.c:1525
markroot
    ../../../src/libgo/runtime/mgc0.c:1362
runtime_parfordo
    ../../../src/libgo/runtime/parfor.c:88
gc
    ../../../src/libgo/runtime/mgc0.c:2266
mgc
    ../../../src/libgo/runtime/mgc0.c:2211
runtime_mstart
    ../../../src/libgo/runtime/proc.c:1000

goroutine 25 [garbage collection]:
runtime_mcall
    ../../../src/libgo/runtime/proc.c:295
runtime_gc
    ../../../src/libgo/runtime/mgc0.c:2187
runtime_mallocgc
    ../../../src/libgo/runtime/malloc.goc:259
reflect.kind.N13_reflect.Value
    ../../../src/libgo/go/reflect/value.go:74
reflect.Kind.N13_reflect.Value
    ../../../src/libgo/go/reflect/value.go:864
asn1.parseField
    ../../../src/libgo/go/encoding/asn1/asn1.go:739
asn1.parseField
    ../../../src/libgo/go/encoding/asn1/asn1.go:778
asn1.parseSequenceOf
    ../../../src/libgo/go/encoding/asn1/asn1.go:494
asn1.parseField
    ../../../src/libgo/go/encoding/asn1/asn1.go:794
asn1.parseField
    ../../../src/libgo/go/encoding/asn1/asn1.go:778
asn1.parseField
    ../../../src/libgo/go/encoding/asn1/asn1.go:778
encoding_asn1.UnmarshalWithParams
    ../../../src/libgo/go/encoding/asn1/asn1.go:917
encoding_asn1.Unmarshal
    ../../../src/libgo/go/encoding/asn1/asn1.go:910
crypto_x509.ParseCertificate
    ../../../src/libgo/go/crypto/x509/x509.go:1093
crypto_tls.doFullHandshake.pN31_crypto_tls.clientHandshakeState
    ../../../src/libgo/go/crypto/tls/handshake_client.go:240
crypto_tls.clientHandshake.pN15_crypto_tls.Conn
    ../../../src/libgo/go/crypto/tls/handshake_client.go:197
crypto_tls.Handshake.pN15_crypto_tls.Conn
    ../../../src/libgo/go/crypto/tls/conn.go:977
http.$nested21
    ../../../src/libgo/go/net/http/transport.go:637
kickoff
    ../../../src/libgo/runtime/proc.c:235
created by net_http.dialConn.pN18_net_http.Transport
    ../../../src/libgo/go/net/http/transport.go:636

goroutine 16 [select]:
runtime_mcall
    ../../../src/libgo/runtime/proc.c:295
selectgo
    ../../../src/libgo/runtime/chan.goc:815
net_http.getConn.pN18_net_http.Transport
    ../../../src/libgo/go/net/http/transport.go:525
net_http.RoundTrip.pN18_net_http.Transport
    ../../../src/libgo/go/net/http/transport.go:228
http.send
    ../../../src/libgo/go/net/http/client.go:219
net_http.send.pN15_net_http.Client
    ../../../src/libgo/go/net/http/client.go:142
net_http.doFollowingRedirects.pN15_net_http.Client
    ../../../src/libgo/go/net/http/client.go:367
net_http.Get.pN15_net_http.Client
    ../../../src/libgo/go/net/http/client.go:299
main.$nested15
    ../../src/gotools/../libgo/go/cmd/go/http.go:57
main.httpsOrHTTP
    ../../src/gotools/../libgo/go/cmd/go/http.go:65
main.repoRootForImportDynamic
    ../../src/gotools/../libgo/go/cmd/go/vcs.go:592
main.repoRootForImportPath
    ../../src/gotools/../libgo/go/cmd/go/vcs.go:482
main.downloadPackage
    ../../src/gotools/../libgo/go/cmd/go/get.go:301
main.download
    ../../src/gotools/../libgo/go/cmd/go/get.go:179
main.runGet
    ../../src/gotools/../libgo/go/cmd/go/get.go:79
main.main
    ../../src/gotools/../libgo/go/cmd/go/main.go:163
runtime_main
    ../../../src/libgo/runtime/proc.c:550
created by main
    ../../../src/libgo/runtime/go-main.c:42

goroutine 17 [syscall]:
    goroutine in C code; stack unavailable
created by runtime_main
    ../../../src/libgo/runtime/proc.c:537

goroutine 18 [finalizer wait]:
runtime_mcall
    ../../../src/libgo/runtime/proc.c:295
runfinq
    ../../../src/libgo/runtime/mgc0.c:2507
kickoff
    ../../../src/libgo/runtime/proc.c:235
created by runtime_createfing
    ../../../src/libgo/runtime/mgc0.c:2572

goroutine 19 [syscall]:
    goroutine in C code; stack unavailable
created by os_signal..import
    ../../../src/libgo/go/os/signal/signal_unix.go:25

goroutine 22 [chan receive]:
runtime_mcall
    ../../../src/libgo/runtime/proc.c:295
chanrecv
    ../../../src/libgo/runtime/chan.goc:299
net_http.dialConn.pN18_net_http.Transport
    ../../../src/libgo/go/net/http/transport.go:643
http.$nested18
    ../../../src/libgo/go/net/http/transport.go:520

    ../../../src/libgo/go/net/http/transport.go:636
kickoff
    ../../../src/libgo/runtime/proc.c:235
created by net_http.getConn.pN18_net_http.Transport
    ../../../src/libgo/go/net/http/transport.go:519

goroutine 21 [GC sweep wait]:
runtime_mcall
    ../../../src/libgo/runtime/proc.c:295
bgsweep
    ../../../src/libgo/runtime/mgc0.c:1842
kickoff
    ../../../src/libgo/runtime/proc.c:235
created by mgc
    ../../../src/libgo/runtime/mgc0.c:2211

goroutine 23 [syscall]:
    goroutine in C code; stack unavailable
created by addtimer
    ../../../src/libgo/runtime/time.goc:147
end

I'm fine with assuming it's something wrong with my system (however I don't have any other problems I've noticed). Let's see if anyone else have similar problem. I've added kernel/filesystem to description.

@davecheney
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@orian above you stated that

System: Linux; Ubuntu 15.04; filesystem: ext4
Kernel: Linux xx 3.19.0-30-generic #33-Ubuntu SMP Mon Sep 21 20:58:04 UTC 2015 x86_64 x86_64 >x86_64 GNU/Linux
Go: 1.4.2 and 1.5.2 (both from golang.org)

But the stack trace you have posted is from a Go program which has been compiled with gccgo.

You mentioned you were using Ubuntu. Can I ask you to check and confirm that you have removed all the operating system provided go packages, specifically gccgo-go and golang-go.

which go should point to whichever version of Go

Go: 1.4.2 and 1.5.2 (both from golang.org)

You have downloaded an installed on your machine.

@orian
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orian commented Jan 5, 2016

I just returned from holidays and looked closer to error. So it looks that I installed gccgo from Ubuntu and it messed up with my settings.

Please close the issue as a buggy environment ;-)

For others:
Do NOT user Ubuntu gccgo with own custom settings.

@minux minux closed this as completed Jan 5, 2016
@ian-kent ian-kent mentioned this issue Jul 8, 2016
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@cybafelo
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cybafelo commented Jul 8, 2016

[08] 11:12 tj@cybafelo C:~> $ go version
go version xgcc (Ubuntu 4.9.3-0ubuntu4) 4.9.3 linux/amd64

its the one in the ubuntu repository - probably its buggy - i will compile from source and try again another day.. thanks for the links they are exactly the same problem i've been having - unpredictable results (i.e. concurrency) - probably related to a buggy go version.

@davecheney
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This issue is closed. Please do not comment on closed issues. Please see https://golang.org/wiki/Questions for good places to ask. Thanks.

@golang golang locked and limited conversation to collaborators Jul 8, 2017
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@davecheney @minux @orian @ianlancetaylor @cybafelo @gopherbot