netdev - Re: skb_warn_if_lro(skb) in ip

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: <20090427.000413.208482056.davem@davemloft.net>
Date:	Mon, 27 Apr 2009 00:04:13 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	markryde@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: skb_warn_if_lro(skb) in ip_forward()

From: Mark Ryden <markryde@...il.com>
Date: Mon, 27 Apr 2009 09:43:39 +0300

> Hello,
> 
> I would appreciate if somebody will explain in a few sentences, why,
> when forwarding
> a packet in IPV4 , in ip_forward() method, (net/ipv4/ip_forward.c) we
> drop the packet
> if it is lro.

Because we have no means by which to reconstitute the original
sub-frames so that we can forward them properly.

This is why, when forwarding or bridging is enabled on an interface
we disable LRO on all devices involved.  Therefore we should never
see LRO frames here.
--
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