netdev - Re: linux-next: Tree for Aug 7

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:	Wed, 07 Aug 2013 16:27:48 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	phil@....cc
Cc:	eric.dumazet@...il.com, johannes@...solutions.net,
	sedat.dilek@...il.com, sfr@...b.auug.org.au,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, hannes@...essinduktion.org,
	linux-wireless@...r.kernel.org, linville@...driver.com
Subject: Re: linux-next: Tree for Aug 7

From: Phil Sutter <phil@....cc>
Date: Wed, 7 Aug 2013 20:37:58 +0200

> One could simply call skb_push(skb, ETH_HLEN) right after calling
> eth_type_trans(skb, dev) in order to undo the 'data' and 'len'
> adjustment. Not sure if this kind of hack is the right way to go here,
> or if the whole af_packet parses ethernet header discussion should be
> opened again instead.

That's completely pointless work.

Without that header pull, the only two things left that
eth_type_trans() does is set the skb->protocol field and
set skb->dev.

And even the latter has to be done already in an else
branch in the suspect AF_PACKET code.

So this eth_type_trans() call is 2/3 duplicate or unnecessary work,
it's the completely the wrong thing to do.

Look, I'm going to fix this myself, because I'm pretty tired of
waiting for the obvious fix.
--
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