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net/core/dev: Warn on a too-short GRO frame
When signaling that a GRO frame is ready to be processed, the network stack correctly checks length and aborts processing when a frame is less than 14 bytes. However, such a condition is really indicative of a broken driver, and should be loudly signaled, rather than silently dropped as the case is today. Convert the condition to use net_warn_ratelimited() to ensure the stack loudly complains about such broken drivers. Signed-off-by: Aaron Conole <aconole@bytheb.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -4663,6 +4663,8 @@ static struct sk_buff *napi_frags_skb(struct napi_struct *napi)
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if (unlikely(skb_gro_header_hard(skb, hlen))) {
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eth = skb_gro_header_slow(skb, hlen, 0);
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if (unlikely(!eth)) {
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net_warn_ratelimited("%s: dropping impossible skb from %s\n",
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__func__, napi->dev->name);
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napi_reuse_skb(napi, skb);
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return NULL;
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}
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