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runtime: kernel crash on darwin (Sierra)? #22016

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fd0 opened this issue Sep 25, 2017 · 4 comments
Closed

runtime: kernel crash on darwin (Sierra)? #22016

fd0 opened this issue Sep 25, 2017 · 4 comments
Labels
FrozenDueToAge NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. OS-Darwin
Milestone
Go1.10

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@fd0
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fd0 commented Sep 25, 2017

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

go version go1.9 linux/amd64 (cross-compiled to darwin)

Does this issue reproduce with the latest release?

yes

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

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/fd0/shared/work/go"
GORACE=""
GOROOT="/usr/lib/go"
GOTOOLDIR="/usr/lib/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build170408252=/tmp/go-build -gno-record-gcc-switches"
CXX="g++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"

What did you do?

I've built the official released binaries for restic on Linux for darwin. A user reported a kernel crash on a Mac with Sierra. According to the user, the machine is otherwise rock solid. The stack trace is:

Anonymous UUID:       72A2DB74-5BE6-0759-EAAF-962BC14E3A29

Sat Sep 23 20:43:12 2017

*** Panic Report ***
panic(cpu 3 caller 0xffffff8021ffe39d): Kernel trap at 0xffffff8021fa4431, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0xffffff7f868ce884, CR3: 0x00000003c9b1e033, CR4: 0x00000000001626e0
RAX: 0xffffff802ba4d438, RBX: 0xffffff7f80000000, RCX: 0xffffff7f868ce880, RDX: 0x000000008013e781
RSP: 0xffffff9220e33ab0, RBP: 0xffffff9220e33af0, RSI: 0x00000000008b5487, RDI: 0x0000000080000000
R8:  0xffffff8038fc6880, R9:  0x0000000000000000, R10: 0x00000000ffffff9f, R11: 0x00000000001f1ac4
R12: 0xffffff80509fe900, R13: 0xffffff802ced8738, R14: 0x0000003fffffffc0, R15: 0x0000000000000000
RFL: 0x0000000000010246, RIP: 0xffffff8021fa4431, CS:  0x0000000000000008, SS:  0x0000000000000010
Fault CR2: 0xffffff7f868ce884, Error code: 0x0000000000000002, Fault CPU: 0x3, PL: 1, VF: 5

Backtrace (CPU 3), Frame : Return Address
0xffffff9220e33740 : 0xffffff8021ee953c 
0xffffff9220e337c0 : 0xffffff8021ffe39d 
0xffffff9220e339a0 : 0xffffff8021e9a593 
0xffffff9220e339c0 : 0xffffff8021fa4431 
0xffffff9220e33af0 : 0xffffff8021faa4e5 
0xffffff9220e33b40 : 0xffffff8021f89d31 
0xffffff9220e33e40 : 0xffffff8021f80d2c 
0xffffff9220e33f30 : 0xffffff8022374685 
0xffffff9220e33f50 : 0xffffff80224240f5 
0xffffff9220e33fb0 : 0xffffff8021e9ad96 

BSD process name corresponding to current thread: restic_0.7.3_dar

Mac OS version:
16G29

Kernel version:
Darwin Kernel Version 16.7.0: Thu Jun 15 17:36:27 PDT 2017; root:xnu-3789.70.16~2/RELEASE_X86_64
Kernel UUID: D3314D98-5D40-3CD8-98A4-F1DD46C20E03
Kernel slide:     0x0000000021c00000
Kernel text base: 0xffffff8021e00000
__HIB  text base: 0xffffff8021d00000
System model name: Macmini6,1 (Mac-031AEE4D24BFF0B1)

Please let me know if there's anything we can do on our end to help debugging this issue. Thank you!

What did you expect to see?

No kernel crash.

What did you see instead?

A kernel crash.
@ianlancetaylor ianlancetaylor changed the title Kernel crash on darwin (Sierra)? runtime: kernel crash on darwin (Sierra)? Sep 25, 2017
@ianlancetaylor ianlancetaylor added NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. OS-Darwin labels Sep 25, 2017
@ianlancetaylor ianlancetaylor added this to the Go1.10 milestone Sep 25, 2017
@ianlancetaylor
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Is this reproducible? How easily?

Unfortunately I don't see any useful information in that panic report. I don't even see which system call was executing or anything. Perhaps others can pull out something useful.

If we can reproduce the problem, then ideally we could get the Darwin equivalent of an strace showing the system call sequence that led to the crash.

@fd0
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fd0 commented Sep 25, 2017

I'll try to find that out, thanks!

@fd0
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fd0 commented Sep 27, 2017

It looks like it's faulty memory, the user managed to crash the kernel with the Apple Hardware Test and memtest86. I'm therefore closing this issue. Thanks!

@fd0 fd0 closed this as completed Sep 27, 2017
@ianlancetaylor
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Thanks for following up.

@golang golang locked and limited conversation to collaborators Sep 27, 2018
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