Re: [PATCH net] ipv6: fix tunnel error handling

From: Michal Kubecek <redacted>
Date: Tue,  3 Nov 2015 08:51:07 +0100 (CET)

Both tunnel6_protocol and tunnel46_protocol share the same error
handler, tunnel6_err(), which traverses through tunnel6_handlers list.
For ipip6 tunnels, we need to traverse tunnel46_handlers as we do e.g.
in tunnel46_rcv(). Current code can generate an ICMPv6 error message
with an IPv4 packet embedded in it.

Fixes: 73d605d1abbd ("[IPSEC]: changing API of xfrm6_tunnel_register")
Signed-off-by: Michal Kubecek <redacted>

Good catch, applied and queued up for -stable.