X-Original-To: alpine-aports@mail.alpinelinux.org
Delivered-To: alpine-aports@mail.alpinelinux.org
Received: from mail.alpinelinux.org (dallas-a1.alpinelinux.org [127.0.0.1])
	by mail.alpinelinux.org (Postfix) with ESMTP id B2628DC1B88
	for <alpine-aports@mail.alpinelinux.org>; Mon, 22 Feb 2016 21:46:29 +0000 (UTC)
Received: from smtp.webfaction.com (mail6.webfaction.com [74.55.86.74])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by mail.alpinelinux.org (Postfix) with ESMTPS id 6AE5EDC0309
	for <alpine-aports@lists.alpinelinux.org>; Mon, 22 Feb 2016 21:46:28 +0000 (UTC)
Received: from [10.16.0.34] (unknown [96.4.0.206])
	by smtp.webfaction.com (Postfix) with ESMTP id B644620C2489
	for <alpine-aports@lists.alpinelinux.org>; Mon, 22 Feb 2016 21:46:27 +0000 (UTC)
Content-Type: text/plain; charset=utf-8
X-Mailinglist: alpine-aports
Precedence: list
List-Id: Alpine Development <alpine-aports.lists.alpinelinux.org>
List-Unsubscribe: 
	<mailto:alpine-aports+unsubscribe@lists.alpinelinux.org?subject=unsubscribe>
List-Post: <mailto:alpine-aports@lists.alpinelinux.org>
List-Help: <mailto:alpine-aports+help@lists.alpinelinux.org?subject=help>
List-Subscribe: 
	<mailto:alpine-aports+subscribe@lists.alpinelinux.org?subject=subscribe>
Mime-Version: 1.0 (Mac OS X Mail 9.2 \(3112\))
Subject: Re: [alpine-aports] [PATCH] community/go: update to go 1.6
From: Nathan Johnson <nathan@nathanjohnson.org>
In-Reply-To: <20160222192020.514ef80e@vostro>
Date: Mon, 22 Feb 2016 15:46:27 -0600
Content-Transfer-Encoding: quoted-printable
Message-Id: <F176D3A9-4529-4394-ADA5-5687FABB3A97@nathanjohnson.org>
References: <1455921565-314-1-git-send-email-nathan@nathanjohnson.info> <20160222170241.77a421ae@vostro.util.wtbts.net> <5849825D-12E6-424F-9A18-B8FA6DFF831F@nathanjohnson.org> <20160222192020.514ef80e@vostro>
To: alpine-aports@lists.alpinelinux.org
X-Mailer: Apple Mail (2.3112)
X-Virus-Scanned: ClamAV using ClamSMTP


> On Feb 22, 2016, at 11:20 AM, Timo Teras <timo.teras@iki.fi> wrote:
>=20
> On Mon, 22 Feb 2016 11:14:57 -0600
> Nathan Johnson <nathan@nathanjohnson.org> wrote:
>=20
>>> On Feb 22, 2016, at 9:02 AM, Timo Teras <timo.teras@iki.fi> wrote:
>>>=20
>>> Hi,
>>>=20
>>> I applied but reverted it. Seems it does not work properly on x86,
>>> but the build fails. Perhaps go now needs pax marking on x86? Or
>>> it's something else? Any ideas? =20
>>=20
>> I did manage to find something interesting:
>>=20
>> Starting
>> program: /home/njohnson/aports/community/go/src/go/src/cmd/dist/dist
>> warning: Cannot call inferior functions, Linux kernel PaX protection
>> forbids return to non-executable pages!
>>=20
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x0809e536 in runtime.setldt ()
>> at /usr/lib/go-bootstrap/src/runtime/sys_linux_386.s:420
>> 420		INT $3 (gdb) quit
>> A debugging session is active.
>>=20
>> I=E2=80=99ll keep digging.
>=20
> There is comment in the apkbuild that sysctl kernel.modify_ldt=3D1 is
> required on x86. I wonder if something broke in that regard. Could be
> also kernel side regression.

After setting that sysctl parameter I was able to get further, but =
ultimately
it still fails.

Feb 22 21:33:09 abuildx86 kern.err kernel: [ 4692.861846] PAX: execution =
attempt in: <anonymous mapping>, 00000000-0008a000 00000000
Feb 22 21:33:09 abuildx86 kern.err kernel: [ 4692.861853] PAX: =
terminating task: =
/home/njohnson/aports/community/go/src/go/bin/go(go):32570, uid/euid: =
1002/1002, PC:    (nil), SP: 5adf0038
Feb 22 21:33:09 abuildx86 kern.err kernel: [ 4692.861855] PAX: bytes at =
PC: ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??=20
Feb 22 21:33:09 abuildx86 kern.err kernel: [ 4692.861875] PAX: bytes at =
SP-4: 00000000 0810dd38 080e1f1f 00000000 00002000 5adf0054 00000000 =
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 =
00000000 00000000 00000000 00000000 00000000 00000000=20
Feb 22 21:33:09 abuildx86 kern.alert kernel: [ 4692.861897] grsec: =
denied resource overstep by requesting 4096 for RLIMIT_CORE against =
limit 0 for /home/njohnson/aports/community/go/src/go/bin/go[go:32570] =
uid/euid:1002/1002 gid/egid:1002/1002, parent /bin/busybox[ash:3256



I also can=E2=80=99t seem to attach to the program with gdb:

abuildx86:~/aports/community/go/src/go/bin$ gdb go
GNU gdb (GDB) 7.10.1
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later =
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show =
copying"
and "show warranty" for details.
This GDB was configured as "i586-alpine-linux-musl".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from go...done.
warning: Missing auto-load script at offset 0 in section =
.debug_gdb_scripts
of file /home/njohnson/aports/community/go/src/go/bin/go.
Use `info auto-load python-scripts [REGEXP]' to list them.
(gdb) run
Starting program: /home/njohnson/aports/community/go/src/go/bin/go=20
warning: Cannot call inferior functions, Linux kernel PaX protection =
forbids return to non-executable pages!

Program terminated with signal SIGKILL, Killed.
The program no longer exists.
(gdb)=20

I=E2=80=99m pretty lost when it comes to PaX .  I did attempt to do a =
paxctl -m on the binary, but I got this:

abuildx86:/var/log# paxctl -m =
/home/njohnson/aports/community/go/src/go/bin/go
file /home/njohnson/aports/community/go/src/go/bin/go is not a valid ELF =
executable (invalid SHT_ entry:22)
abuildx86:/var/log#=20

I=E2=80=99m out of ideas at this point.=


---
Unsubscribe:  alpine-aports+unsubscribe@lists.alpinelinux.org
Help:         alpine-aports+help@lists.alpinelinux.org
---