netdev - Re: [PATCH] netfilter: fix looped (broad|multi)cast's MAC handling.

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

Message-ID: <4DFA20FE.80708@trash.net>
Date:	Thu, 16 Jun 2011 17:27:58 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Nicolas Cavallari <Nicolas.Cavallari@....fr>
CC:	fw@...len.de, netfilter-devel@...r.kernel.org,
	netdev@...r.kernel.org, Nicolas Cavallari <cavallar@....fr>
Subject: Re: [PATCH] netfilter: fix looped (broad|multi)cast's MAC handling.

On 10.06.2011 09:20, Nicolas Cavallari wrote:
> By default, when broadcast or multicast packet are sent from a local
> application, they are sent to the interface then looped by the kernel
> to other local applications, going throught netfilter hooks in the process.
> 
> These looped packet have their MAC header removed from the skb by the kernel
> looping code.
> This confuse various netfilter's netlink queue, netlink log and the
> legacy ip_queue, because they try to extract a hardware
> address from these packets, but extracts a part of the IP header instead.
> 
> This patch prevent NFQUEUE, NFLOG and ip_QUEUE to include a MAC header
> if there is none in the packet.

Applied, thanks Nicolas.
--
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