netdev - Re: [net PATCH v2] flow_dissector: Fix unaligned access in __skb_flow_dissector when used by eth_get

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Date:	Tue, 09 Feb 2016 07:08:43 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	aduyck@...antis.com
Cc:	netdev@...r.kernel.org, alexander.duyck@...il.com,
	tom@...bertland.com
Subject: Re: [net PATCH v2] flow_dissector: Fix unaligned access in
 __skb_flow_dissector when used by eth_get_headlen

From: Alexander Duyck <aduyck@...antis.com>
Date: Tue, 09 Feb 2016 02:49:54 -0800

> This patch fixes an issue with unaligned accesses when using
> eth_get_headlen on a page that was DMA aligned instead of being IP aligned.
> The fact is when trying to check the length we don't need to be looking at
> the flow label so we can reorder the checks to first check if we are
> supposed to gather the flow label and then make the call to actually get
> it.
> 
> v2:  Updated path so that either STOP_AT_FLOW_LABEL or KEY_FLOW_LABEL can
>      cause us to check for the flow label.
> 
> Reported-by: Sowmini Varadhan <sowmini.varadhan@...cle.com>
> Signed-off-by: Alexander Duyck <aduyck@...antis.com>

Applied and queued up for -stable, thanks Alex.