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Crash with STATUS_STACK_BUFFER_OVERRUN on nil pointer dereference (windows) #30319

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0xd34d10cc opened this issue Feb 19, 2019 · 2 comments
Closed

Crash with STATUS_STACK_BUFFER_OVERRUN on nil pointer dereference (windows) #30319

0xd34d10cc opened this issue Feb 19, 2019 · 2 comments
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@0xd34d10cc
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0xd34d10cc commented Feb 19, 2019 •
edited

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

$ go version
go version go1.11.5 windows/amd64

Does this issue reproduce with the latest release?

Yes

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

go env Output
$ go env
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\d34d10cc\AppData\Local\go-build
set GOEXE=.exe
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOOS=windows
set GOPATH=D:\development\gopath
set GOPROXY=
set GORACE=
set GOROOT=D:\development\go
set GOTMPDIR=
set GOTOOLDIR=D:\development\go\pkg\tool\windows_amd64
set GCCGO=gccgo
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=C:\Users\d34d10cc\AppData\Local\Temp\go-build060979054=/tmp/go-build -gno-record-gcc-switches

What did you do?

I ran this program:

package main

import "log"
import "os"


func main() {
        type Point struct {
                x int
                y int
        }

        var p *Point = nil

        l := log.New(os.Stderr, "", 0)
        l.Println("log msg")

        log.Printf("%v", p.x)
}

with go run main.go command

What did you expect to see?

Panic message

What did you see instead?

$ go run ./main.go
log msg
exit status 3221226505
@0xd34d10cc 0xd34d10cc changed the title Crash with STATUS_STACK_BUFFER_OVERRUN on nil pointer dereference Crash with STATUS_STACK_BUFFER_OVERRUN on nil pointer dereference (windows) Feb 19, 2019
@0xd34d10cc
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Disabling CFG (control flow graph) in windows defender settings "resolves" this problem. Not sure where the bug is - in windows defender or in go, or if "bug" even exist. Feel free to close this issue.

@ianlancetaylor
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Thanks for following up. Closing.

@golang golang locked and limited conversation to collaborators Feb 20, 2020
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@ianlancetaylor @gopherbot @0xd34d10cc