From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Fw: [Bug 201773] New: IP_FREEBIND =?UTF-8?B?ZG9lc27igJl0?=
 counteract global
Date: Fri, 23 Nov 2018 09:23:27 -0800
Message-ID: <20181123092327.2ec1ac5e@xeon-e3>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
To: netdev@vger.kernel.org
Return-path: <netdev-owner@vger.kernel.org>
Received: from mail-pl1-f176.google.com ([209.85.214.176]:46824 "EHLO
        mail-pl1-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S2391344AbeKXEIm (ORCPT
        <rfc822;netdev@vger.kernel.org>); Fri, 23 Nov 2018 23:08:42 -0500
Received: by mail-pl1-f176.google.com with SMTP id t13so10888544ply.13
        for <netdev@vger.kernel.org>; Fri, 23 Nov 2018 09:23:34 -0800 (PST)
Received: from xeon-e3 (204-195-22-127.wavecable.com. [204.195.22.127])
        by smtp.gmail.com with ESMTPSA id q199sm64584194pfc.97.2018.11.23.09.23.33
        for <netdev@vger.kernel.org>
        (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256);
        Fri, 23 Nov 2018 09:23:33 -0800 (PST)
Sender: netdev-owner@vger.kernel.org
List-ID: <netdev.vger.kernel.org>

Could be a bug, or just how it works?

Begin forwarded message:

Date: Thu, 22 Nov 2018 22:51:12 +0000
From: bugzilla-daemon@bugzilla.kernel.org
To: stephen@networkplumber.org
Subject: [Bug 201773] New: IP_FREEBIND doesn=E2=80=99t counteract global


https://bugzilla.kernel.org/show_bug.cgi?id=3D201773

            Bug ID: 201773
           Summary: IP_FREEBIND doesn=E2=80=99t counteract global
           Product: Networking
           Version: 2.5
    Kernel Version: 3.10.0-862.11.6.el7.x86_64
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: IPV4
          Assignee: stephen@networkplumber.org
          Reporter: felipe@felipegasper.com
        Regression: No

The following should fail, regardless of /proc/sys/net/ipv4/ip_nonlocal_bin=
d:

-----
> strace -e socket,setsockopt,bind perl -MSocket -Mautodie -e'socket my $s,
> PF_INET, SOCK_STREAM, 0; setsockopt( $s, IPPROTO_IP, 15, 0 ); bind( $s,
> pack_sockaddr_in( 0, inet_aton("1.2.3.4") ) );' =20
socket(AF_INET, SOCK_STREAM, IPPROTO_IP) =3D 3
setsockopt(3, SOL_IP, IP_FREEBIND, [0], 4) =3D 0
bind(3, {sa_family=3DAF_INET, sin_port=3Dhtons(0), sin_addr=3Dinet_addr("1.=
2.3.4")},
16) =3D 0
+++ exited with 0 +++
-----

=E2=80=A6 however, it appears that setsockopt() doesn=E2=80=99t disable IP_=
FREEBIND if
ip_nonlocal_bind is set via /proc.

--=20
You are receiving this mail because:
You are the assignee for the bug.