netdev - Re: [ofa-general] NetEffect, iw

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]

Message-ID: <20090130082523.0fb8fb60@extreme>
Date:	Fri, 30 Jan 2009 08:25:23 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Roland Dreier <rdreier@...co.com>, davem@...emloft.net,
	aluno3@...zta.onet.pl, general@...ts.openfabrics.org,
	netdev@...r.kernel.org
Subject: Re: [ofa-general] NetEffect, iw_nes and kernel warning

On Fri, 30 Jan 2009 17:57:21 +1100
Herbert Xu <herbert@...dor.apana.org.au> wrote:

> Roland Dreier <rdreier@...co.com> wrote:
> > 
> > OK, thanks... what confused me is that several other drivers also do
> > skb_linearize() in their hard_start_xmit method... eg bnx2x,
> > via-velocity, mv643xx_eth.  So there are several other lurking bugs to
> > deal with here I guess.
> 
> I don't know about the rest but bnx2x is certainly OK since it
> only does so with IRQ enabled.  It is legal to call skb_linearize
> as long as you're sure that IRQs are enabled, which is always the
> case for hard_start_xmit upon entry.
> 
> So the only time you can't call it in hard_start_xmit is if you've
> just disabled IRQs yourself.

Or netconsole.
netconsole calls start_xmit from IRQ 
but it is safe since netconsole doesn't send fragmented skb's
--
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