From: Yuya Kusakabe <yuya.kusakabe@gmail.com>
Date: Tue, 16 Apr 2019 10:22:28 +0900
Subject: net: Fix missing meta data in skb with vlan packet
Patch-mainline: v5.1-rc6
Git-commit: d85e8be2a5a02869f815dd0ac2d743deb4cd7957
References: bsc#1109837
skb_reorder_vlan_header() should move XDP meta data with ethernet header
if XDP meta data exists.
Fixes: de8f3a83b0a0 ("bpf: add meta pointer for direct access")
Signed-off-by: Yuya Kusakabe <yuya.kusakabe@gmail.com>
Signed-off-by: Takeru Hayasaka <taketarou2@gmail.com>
Co-developed-by: Takeru Hayasaka <taketarou2@gmail.com>
Reviewed-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
net/core/skbuff.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -4694,7 +4694,8 @@ EXPORT_SYMBOL_GPL(skb_gso_validate_mac_l
static struct sk_buff *skb_reorder_vlan_header(struct sk_buff *skb)
{
- int mac_len;
+ int mac_len, meta_len;
+ void *meta;
if (skb_cow(skb, skb_headroom(skb)) < 0) {
kfree_skb(skb);
@@ -4706,6 +4707,13 @@ static struct sk_buff *skb_reorder_vlan_
memmove(skb_mac_header(skb) + VLAN_HLEN, skb_mac_header(skb),
mac_len - VLAN_HLEN - ETH_TLEN);
}
+
+ meta_len = skb_metadata_len(skb);
+ if (meta_len) {
+ meta = skb_metadata_end(skb) - meta_len;
+ memmove(meta + VLAN_HLEN, meta, meta_len);
+ }
+
skb->mac_header += VLAN_HLEN;
return skb;
}