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[BRIDGE]: Unshare skb upon entry
Due to the special location of the bridging hook, it should never see a shared packet anyway (certainly not with any in-kernel code). So it makes sense to unshare the skb there if necessary as that will greatly simplify the code below it (in particular, netfilter). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -126,6 +126,10 @@ struct sk_buff *br_handle_frame(struct net_bridge_port *p, struct sk_buff *skb)
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if (!is_valid_ether_addr(eth_hdr(skb)->h_source))
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goto drop;
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skb = skb_share_check(skb, GFP_ATOMIC);
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if (!skb)
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return NULL;
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if (unlikely(is_link_local(dest))) {
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/* Pause frames shouldn't be passed up by driver anyway */
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if (skb->protocol == htons(ETH_P_PAUSE))
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