linux-kernel - PROBLEM: no autoconfigured link-local address on a bridge when it's UP (>= kernel 2.6.39)

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>] [day] [month] [year] [list]

Date:	Sun, 7 Aug 2011 00:33:02 +0200
From:	Emeric VERSCHUUR <emericv@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: PROBLEM: no autoconfigured link-local address on a bridge when it's
 UP (>= kernel 2.6.39)

Hello,

When I create a bridge interface and set up it, there are no local
link IPv6 address automaticaly attributed to my bridge interface

keywords: kernel module bridge ipv6 local-link

Steps to Reproduce (very easy):
* use my attached kernel config (kconfig-2.6.39 or kconfig-3.0.0)
* create a bridge: brctl addbr br0
* set up the bridge: ip intf set br0 up

Expected result:
An local link IPv6 address (type Scope:Link) must be autoconfigured on my bridge

Actual result:
There are no local link address (you have to add it manually)

Detected in version 2.6.39 and 3.0.0

INFO: I have perform the test with 3 version and with the exactly same config:
2.6.38 [OK] (kconfig-2.6.38)
2.6.39 [KO] (kconfig-2.6.39)
3.0.00 [KO] (kconfig-3.0.00)

I would know if it's an kernel config error or really a regression in
the bridge module.

Best regards,
Emeric Verschuur

Download attachment "kconfig-2.6.38" of type "application/octet-stream" (87902 bytes)

Download attachment "kconfig-2.6.39" of type "application/octet-stream" (89051 bytes)

Download attachment "kconfig-3.0.0" of type "application/octet-stream" (89661 bytes)

Download attachment "ver_linux_output" of type "application/octet-stream" (1249 bytes)

Download attachment "cpuinfo_output" of type "application/octet-stream" (6584 bytes)

Download attachment "modules_output" of type "application/octet-stream" (2180 bytes)

Download attachment "ioports_output" of type "application/octet-stream" (1257 bytes)

Download attachment "iomem_output" of type "application/octet-stream" (2932 bytes)

Download attachment "lspci_output" of type "application/octet-stream" (47042 bytes)

Download attachment "scsi_output" of type "application/octet-stream" (815 bytes)

Download attachment "proc_sys_net_output" of type "application/octet-stream" (27726 bytes)