netdev - [BISECTED] Linux 3.2: Networking out of LAN does not work

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <OF0BD4E9BA.3C3D7E41-ONC1257990.0034993D-C1257990.0034B2CE@bdpnet.dk>
Date:	Wed, 25 Jan 2012 10:35:37 +0100
From:	Rune Magnussen <rum@...kdata.dk>
To:	netdev@...r.kernel.org
Subject: [BISECTED] Linux 3.2: Networking out of LAN does not work

Hi

Networking to and from the outside of my LAN does not work with Linux 
3.2.x.
Linux 3.1.x works. Using ssh from a PC on the LAN also works.
The machine has a VIA C7 CPU and the NIC uses the 8139too-driver.

Another machine with a r8169-NIC and an Atom-CPU (32bit) did not 
show any problems.
It was used very ligtly though.

Bisection led to this:
---
f04565ddf52e401880f8ba51de0dff8ba51c99fd is the first bad commit
commit f04565ddf52e401880f8ba51de0dff8ba51c99fd
Author: Mihai Maruseac <mihai.maruseac@...il.com>
Date:   Thu Oct 20 20:45:10 2011 +0000

    dev: use name hash for dev_seq_ops
 
    Instead of using the dev->next chain and trying to resync at each call 
to
    dev_seq_start, use the name hash, keeping the bucket and the offset in
    seq->private field.
 
    Tests revealed the following results for ifconfig > /dev/null
       * 1000 interfaces:
          * 0.114s without patch
          * 0.089s with patch
       * 3000 interfaces:
          * 0.489s without patch
          * 0.110s with patch
       * 5000 interfaces:
          * 1.363s without patch
          * 0.250s with patch
       * 128000 interfaces (other setup):
          * ~100s without patch
          * ~30s with patch
 
    Signed-off-by: Mihai Maruseac <mmaruseac@...acom.com>
    Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
    Signed-off-by: David S. Miller <davem@...emloft.net>

:040000 040000 2e86e1c9ecaf719d312a8b5863ec9e89d92bc4b3 
8b0d09ca105502dd5389bb6281ef059c8bb38667 M   net
---

Simply reverting the commit on top of Linux 3.2.1 resultet in a build 
error.

Used kernel configuration: http://knus.info/kernel/config-3.1.txt

Greetings Rune

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html