netdev - Re: [PATCH net V2] virtio-net: drop NETIF_F

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Message-Id: <20150807.001326.1062649438183092058.davem@davemloft.net>
Date:	Fri, 07 Aug 2015 00:13:26 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jasowang@...hat.com
Cc:	mst@...hat.com, virtualization@...ts.linux-foundation.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	sergei.shtylyov@...entembedded.com
Subject: Re: [PATCH net V2] virtio-net: drop NETIF_F_FRAGLIST

From: Jason Wang <jasowang@...hat.com>
Date: Wed,  5 Aug 2015 10:34:04 +0800

> virtio declares support for NETIF_F_FRAGLIST, but assumes
> that there are at most MAX_SKB_FRAGS + 2 fragments which isn't
> always true with a fraglist.
> 
> A longer fraglist in the skb will make the call to skb_to_sgvec overflow
> the sg array, leading to memory corruption.
> 
> Drop NETIF_F_FRAGLIST so we only get what we can handle.
> 
> Cc: Michael S. Tsirkin <mst@...hat.com>
> Signed-off-by: Jason Wang <jasowang@...hat.com>

Applied, thanks Jason.
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