diff mbox series

[net,3/3] ip6erspan: make sure enough headroom at xmit.

Message ID 1520609682-101077-4-git-send-email-u9012063@gmail.com
State Accepted, archived
Delegated to: David Miller
Headers show
Series a couple of erspan fixes | expand

Commit Message

William Tu March 9, 2018, 3:34 p.m. UTC 
The patch adds skb_cow_header() to ensure enough headroom
at ip6erspan_tunnel_xmit before pushing the erspan header
to the skb.

Signed-off-by: William Tu <u9012063@gmail.com>
---
 net/ipv6/ip6_gre.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 4ab476d3a46e..9a759bbbd8a6 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -906,6 +906,9 @@  static netdev_tx_t ip6erspan_tunnel_xmit(struct sk_buff *skb,
 		truncate = true;
 	}
 
+	if (skb_cow_head(skb, dev->needed_headroom))
+		goto tx_err;
+
 	t->parms.o_flags &= ~TUNNEL_KEY;
 	IPCB(skb)->flags = 0;