On Tue, Feb 28, 2017 at 3:09 PM, David Ahern [off-list ref] wrote:

On 2/28/17 5:10 AM, Eric Dumazet wrote:

quoted

David, rt->rt6i_idev can be NULL.

Do you know of an example where rt6i_idev can be NULL - besides the
null_entry rt which is null only because of init order?

I might have been mistaken, but many points in net/ipv6/route.c test
rt->rt6i_idev being NULL or not before dereferencing it.

Maybe other rts (other than null_entry) share this property.