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authorToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>2018-03-13 14:51:28 +0900
committerDavid S. Miller <davem@davemloft.net>2018-03-16 10:03:47 -0400
commitcbe7128c4b92e2004984f477fd38dfa81662f02e (patch)
tree7805f8eec1279109bf15a6177f286a0aacbf017c /net
parent4bbb3e0e8239f9079bf1fe20b3c0cb598714ae61 (diff)
downloadlinux-cbe7128c4b92e2004984f477fd38dfa81662f02e.tar.bz2
vlan: Fix out of order vlan headers with reorder header off
With reorder header off, received packets are untagged in skb_vlan_untag() called from within __netif_receive_skb_core(), and later the tag will be inserted back in vlan_do_receive(). This caused out of order vlan headers when we create a vlan device on top of another vlan device, because vlan_do_receive() inserts a tag as the outermost vlan tag. E.g. the outer tag is first removed in skb_vlan_untag() and inserted back in vlan_do_receive(), then the inner tag is next removed and inserted back as the outermost tag. This patch fixes the behaviour by inserting the inner tag at the right position. Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/8021q/vlan_core.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 64aa9f755e1d..45c9bf5ff3a0 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -48,8 +48,8 @@ bool vlan_do_receive(struct sk_buff **skbp)
* original position later
*/
skb_push(skb, offset);
- skb = *skbp = vlan_insert_tag(skb, skb->vlan_proto,
- skb->vlan_tci);
+ skb = *skbp = vlan_insert_inner_tag(skb, skb->vlan_proto,
+ skb->vlan_tci, skb->mac_len);
if (!skb)
return false;
skb_pull(skb, offset + VLAN_HLEN);