Commit 0b796750 authored by Michał Mirosław's avatar Michał Mirosław Committed by David S. Miller

net/veth: Fix packet checksumming

We can't change ip_summed from CHECKSUM_PARTIAL to CHECKSUM_NONE
or CHECKSUM_UNNECESSARY because checksum in packet's headers is
not valid and will cause invalid checksum when frame is forwarded.
Signed-off-by: default avatarMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 76d66158
...@@ -166,7 +166,9 @@ static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev) ...@@ -166,7 +166,9 @@ static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev)
if (!(rcv->flags & IFF_UP)) if (!(rcv->flags & IFF_UP))
goto tx_drop; goto tx_drop;
if (dev->features & NETIF_F_NO_CSUM) /* don't change ip_summed == CHECKSUM_PARTIAL, as that
will cause bad checksum on forwarded packets */
if (skb->ip_summed == CHECKSUM_NONE)
skb->ip_summed = rcv_priv->ip_summed; skb->ip_summed = rcv_priv->ip_summed;
length = skb->len + ETH_HLEN; length = skb->len + ETH_HLEN;
......
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