Fixes: e41c7c68ea77 ("ip6erspan: make sure enough headroom at xmit.")
On Thu, May 17, 2018 at 7:36 AM, Petr Machata wrote:
> dev->needed_headroom is not primed until ip6_tnl_xmit(), so it starts
> out zero. Thus the call to skb_cow_head() fails to actually make sure
> there's enough headroom to push the ERSPAN headers to. That can lead to
> the panic cited below. (R
dev->needed_headroom is not primed until ip6_tnl_xmit(), so it starts
out zero. Thus the call to skb_cow_head() fails to actually make sure
there's enough headroom to push the ERSPAN headers to. That can lead to
the panic cited below. (Reproducer below that).
Fix by requesting either needed_headro
