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vlan: fix network_header/mac_header adjustments

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Lennert Buytenhek points out that the VLAN code incorrectly adjusts
skb->network_header to point in the middle of the VLAN header and
additionally tries to adjust skb->mac_header without checking for
validity.

The network_header should not be touched at all since we're only
adding headers in front of it, mac_header adjustments are not
necessary at all.

Based on patch by Lennert Buytenhek <buytenh@wantstofly.org>.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2008-07-08 03:21:27 -07:00 committed by David S. Miller
parent 256f3bfce8
commit acc81e1465
2 changed files with 0 additions and 3 deletions
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2
include/linux/if_vlan.h
View file

@ -279,8 +279,6 @@ static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, unsigned short
veth->h_vlan_TCI = htons(tag);
skb->protocol = htons(ETH_P_8021Q);
skb->mac_header -= VLAN_HLEN;
skb->network_header -= VLAN_HLEN;
return skb;
}

1
net/8021q/vlan_dev.c
View file

@ -308,7 +308,6 @@ static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
vhdr->h_vlan_encapsulated_proto = htons(len);
skb->protocol = htons(ETH_P_8021Q);
skb_reset_network_header(skb);
}
/* Before delegating work to the lower layer, enter our MAC-address */