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skbuff: Fix offset error in skb_reorder_vlan_header

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[ Upstream commit f654861569 ]

skb_reorder_vlan_header is called after the vlan header has
been pulled.  As a result the offset of the begining of
the mac header has been incrased by 4 bytes (VLAN_HLEN).
When moving the mac addresses, include this incrase in
the offset calcualation so that the mac addresses are
copied correctly.

Fixes: a6e18ff111 (vlan: Fix untag operations of stacked vlans with REORDER_HEADER off)
CC: Nicolas Dichtel <nicolas.dichtel@6wind.com>
CC: Patrick McHardy <kaber@trash.net>
Signed-off-by: Vladislav Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vlad Yasevich
2015-12-14 17:44:10 -05:00
committed by Greg Kroah-Hartman
parent bdaa853b10
commit 2af7df8919
1 changed files with 1 additions and 1 deletions
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2
net/core/skbuff.c
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@@ -4200,7 +4200,7 @@ static struct sk_buff *skb_reorder_vlan_header(struct sk_buff *skb)
return NULL;
}
memmove(skb->data - ETH_HLEN, skb->data - skb->mac_len,
memmove(skb->data - ETH_HLEN, skb->data - skb->mac_len - VLAN_HLEN,
2 * ETH_ALEN);
skb->mac_header += VLAN_HLEN;
return skb;