netdev - Re: build breakage due to br_multicast.c referencing ipv6_dev_get

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

Date:	Thu, 17 Mar 2011 09:45:23 -0400
From:	Brian Haley <brian.haley@...com>
To:	Jan Beulich <JBeulich@...ell.com>
CC:	davem@...emloft.net, shemminger@...ux-foundation.org,
	bridge@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linus.luessing@....de
Subject: Re: build breakage due to br_multicast.c referencing	 ipv6_dev_get_saddr()

On 03/17/2011 03:57 AM, Jan Beulich wrote:
>>>> On 16.03.11 at 18:34, Brian Haley <brian.haley@...com> wrote:
>> On 03/16/2011 08:34 AM, Jan Beulich wrote:
>>> With BRIDGE=y and IPV6=m commit
>>> fe29ec41aaa51902aebd63658dfb04fe6fea8be5 ("bridge: Use IPv6
>>> link-local address for multicast listener queries") causes the build to
>>> break.
>>>
>>> Similary, even if both are =m, but ipv6.ko got blacklisted (as is
>>> happening in various SuSE distros when disabling IPv6), there's
>>> a runtime problem since bridge.ko then won't load anymore due
>>> to the missing symbol.
>>
>> Load the ipv6 module with disable=1, which is why I added it :)
> 
> Indeed, I realized there is such an option only after I sent
> that mail. Nevertheless, I think it is overkill to load a huge
> module like this just to satisfy never actually used symbol
> references.

I could also argue that the bridge code could change into IPv4-only
and IPv6-only pieces to avoid this too (without actually looking
at the code of course).  But in this case you actually built the kernel
with IPV6=m right?

> In fact, just like it seems bogus to load ipv6.ko in a pure IPv4
> environment, I think the opposite is also true: IPv4 support
> should be in a module, and it should be possible to not load
> it in a pure IPv6 environment.

That's a much bigger nut to crack...

-Brian
--
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