Hi All,

I am working porting go supplementary network libraries https://godoc.org/golang.org/x/net on ppc64le architecture. I am using Ubuntu 15.10 on top of ppc64le hardware. I have successfully built go supplementary network repository on ppc64le but while running automated test cases I observe that ‘TestNonPrivilegedPing’ test case fail with ‘you may need to adjust the net.ipv4.ping_group_range kernel state / permission denied ‘messages. I am compiling and testing go networking repository as a root user so I don’t know why I am getting ‘permission denied’ message.

Below is the description of test case failure on Ubuntu 15.10,

--- FAIL: TestNonPrivilegedPing (0.00s)
ping_test.go:73: you may need to adjust the net.ipv4.ping_group_range kernel state
ping_test.go:80: socket: permission denied
ping_test.go:80: socket: permission denied
=== RUN TestPrivilegedPing
--- FAIL: TestPrivilegedPing (0.40s)
ping_test.go:101: write ip6 ::->2404:6800:4009:807::2004: sendto: network is unreachable
FAIL
FAIL golang.org/x/net/icmp 0.409s
=== RUN TestIDNA

I performed below steps for compiling / building go supplementary network library on Ubuntu 15.10 (ppc64le)

Step 1: Update repositories and install required packages to build go repository
$ apt-get update && apt-get install -y git golang-go

Step 2: Create workspace to build go network repository
$ mkdir workspace
$ cd workspace/
$ mkdir bin src pkg
$ cd src/
$ mkdir -p golang.org/x
$ cd golang.org/x

Step 3: Clone go networking repository and other source for required building go network repository
$ git clone https://github.com/golang/text.git
$ git clone https://github.com/golang/crypto.git
$ git clone https://github.com/golang/net.git
$ cd /workspace/src

Step 4: Set environment variables required compile repository
$ export GOPATH=/workspace
$ export PATH=$PATH:$GOPATH/bin

Step 5: build and test go networking repository
$ go test -v ./...

I followed same steps on Ubuntu 15.10 + amd64 combination and got exactly same result. ‘TestPrivilegedPing’ test case fails with same messages which I have seen on Ubuntu 15.10 + ppc64le combination

Any pointers/suggestions on failed test case will be great help.

Below is additional information required for debug / resolve /reproduce test case failure,

1. What version of Go are you using (go version)?
   $ go version
   go version go1.4.2 gccgo (Ubuntu 5.2.1-22ubuntu2) 5.2.1 20151010 linux/ppc64le
2. What operating system and processor architecture are you using (go env)?

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.10
Release: 15.10
Codename: wily

$ go env
GOARCH="ppc64le"
GOBIN=""
GOCHAR="9"
GOEXE=""
GOHOSTARCH="ppc64le"
GOHOSTOS="linux"
GOOS="linux"
GOPATH=""
GORACE=""
GOROOT="/usr"
GOTOOLDIR="/usr/lib/gcc/powerpc64le-linux-gnu/5"
CC="/usr/bin/gcc-5"
GOGCCFLAGS="-fPIC -pthread -fmessage-length=0"
CXX="/usr/bin/g++-5"
CGO_ENABLED="1"

$ uname -a
Linux 9de5feaaf936 3.16.0-30-generic #40-Ubuntu SMP Mon Jan 12 22:07:11 UTC 2015 ppc64le ppc64le ppc64le GNU/Linux

1. What did you do?
   I am working porting go supplementary networking libraries https://godoc.org/golang.org/x/net on ppc64le architecture. Already provided steps to reproduce test case failure
2. What did you expect to see?
   No test case failure on Ubuntu 15.10 + ppc64le combination
3. What did you see instead?
   Automated test case execution failed due to failure of ‘TestPrivilegedPing’ test case