Re: [PATCH] net: icmp_route_lookup should use rt dev to determine L3 domain

From: David Ahern <redacted>
Date: Thu,  3 Nov 2016 10:13:39 -0700

icmp_send is called in response to some event. The skb may not have
the device set (skb->dev is NULL), but it is expected to have an rt.
Update icmp_route_lookup to use the rt on the skb to determine L3
domain.

Fixes: 613d09b30f8b ("net: Use VRF device index for lookups on TX")
Signed-off-by: David Ahern <redacted>

"skb_dst(...)->dev" would be more direct and look nicer.  No need to
use skb_rtable() just to walk backwards to the 'dst'.