linux-kernel - Re: [Xen-devel] BUG in xennet_make

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Message-ID: <5460EAF1.5020903@citrix.com>
Date:	Mon, 10 Nov 2014 16:42:25 +0000
From:	David Vrabel <david.vrabel@...rix.com>
To:	Zoltan Kiss <zoltan.kiss@...aro.org>, <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	Stefan Bader <stefan.bader@...onical.com>,
	Jay Vosburgh <jay.vosburgh@...onical.com>,
	<linux-kernel@...r.kernel.org>, <xen-devel@...ts.xenproject.org>
Subject: Re: [Xen-devel] BUG in xennet_make_frags with paged skb data

On 10/11/14 16:39, Zoltan Kiss wrote:
> 
> The BUG_ON suggested by Stefan would be still reasonable:
> 
> BUG_ON(((page-compound_head(page))*PAGE_SIZE)+offset+len >
> PAGE_SIZE<<compound_order(compound_head(page)));

Well, it wouldn't trigger but I don't think it is useful any more.

David
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