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ip6erspan: make sure enough headroom at xmit.

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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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
William Tu 2018-03-09 07:34:42 -08:00 committed by David S. Miller
parent d6aa71197f
commit e41c7c68ea
1 changed files with 3 additions and 0 deletions
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3
net/ipv6/ip6_gre.c
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@ -903,6 +903,9 @@ 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;