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net: orphan frags on receive
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 <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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parent
868eefeb17
commit
1080e512d4
1 changed files with 6 additions and 1 deletions
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@ -1632,6 +1632,8 @@ static inline int deliver_skb(struct sk_buff *skb,
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struct packet_type *pt_prev,
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struct net_device *orig_dev)
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{
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if (unlikely(skb_orphan_frags(skb, GFP_ATOMIC)))
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return -ENOMEM;
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atomic_inc(&skb->users);
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return pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
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}
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@ -3262,6 +3264,9 @@ static int __netif_receive_skb(struct sk_buff *skb)
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}
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if (pt_prev) {
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if (unlikely(skb_orphan_frags(skb, GFP_ATOMIC)))
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ret = -ENOMEM;
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else
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ret = pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
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} else {
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atomic_long_inc(&skb->dev->rx_dropped);
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