net: keep original skb which only needs header checking during software GSO
Commit ce93718f ("net: Don't keep around original SKB when we software segment GSO frames") frees the original skb after software GSO even for dodgy gso skbs. This breaks the stream throughput from untrusted sources, since only header checking was done during software GSO instead of a true segmentation. This patch fixes this by freeing the original gso skb only when it was really segmented by software. Fixes ce93718f ("net: Don't keep around original SKB when we software segment GSO frames.") Cc: David S. Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NJason Wang <jasowang@redhat.com> Acked-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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