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8021q: fix mac_len recomputation in vlan_untag()

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[ Upstream commit 5316cf9a51 ]

skb_reset_mac_len() relies on the value of the skb->network_header pointer,
therefore we must wait for such pointer to be recalculated before computing
the new mac_len value.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Antonio Quartulli 2012-10-02 06:14:17 +00:00 committed by Greg Kroah-Hartman
parent 97d5d32951
commit 2ab08687cf
1 changed files with 2 additions and 1 deletions
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3
net/8021q/vlan_core.c
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@ -106,7 +106,6 @@ static struct sk_buff *vlan_reorder_header(struct sk_buff *skb)
return NULL;
memmove(skb->data - ETH_HLEN, skb->data - VLAN_ETH_HLEN, 2 * ETH_ALEN);
skb->mac_header += VLAN_HLEN;
skb_reset_mac_len(skb);
return skb;
}
@ -140,6 +139,8 @@ struct sk_buff *vlan_untag(struct sk_buff *skb)
skb_reset_network_header(skb);
skb_reset_transport_header(skb);
skb_reset_mac_len(skb);
return skb;
err_free: