[PATCH net 3/3] ip6erspan: make sure enough headroom at xmit.
flat view
STALE3148d
From: William Tu <hidden>
Date: 2018-03-09 15:35:18
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
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 <redacted> --- net/ipv6/ip6_gre.c | 3 +++ 1 file changed, 3 insertions(+)
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;
--
2.7.4