From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: [PATCHv2-RFC 5/6] net: orphan frags on receive Date: Thu, 17 May 2012 00:16:16 +0300 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Jason Wang , eric.dumazet@gmail.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, ebiederm@xmission.com, davem@davemloft.net To: "Michael S. Tsirkin" Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org zero copy packets are normally sent to the outside network, but bridging, tun etc might loop them back to host networking stack. If this happens destructors will never be called, so orphan the frags immediately on receive. Signed-off-by: Michael S. Tsirkin --- net/core/dev.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/net/core/dev.c b/net/core/dev.c index 66cae6e..cd7d421 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1628,6 +1628,8 @@ static inline int deliver_skb(struct sk_buff *skb, struct packet_type *pt_prev, struct net_device *orig_dev) { + if (unlikely(skb_orphan_frags(skb, GFP_ATOMIC))) + return -ENOMEM; atomic_inc(&skb->users); return pt_prev->func(skb, skb->dev, pt_prev, orig_dev); } -- MST