Re: [PATCH net-next] ipv6: add ip6_null_entry check in rt6_select()

From: Wei Wang <redacted>
Date: Mon, 23 Oct 2017 14:59:35 -0700

From: Wei Wang <redacted>

In rt6_select(), fn->leaf could be pointing to net->ipv6.ip6_null_entry.
In this case, we should directly return instead of trying to carry on
with the rest of the process.
If not, we could crash at:
  spin_lock_bh(&leaf->rt6i_table->rt6_lock);
because net->ipv6.ip6_null_entry does not have rt6i_table set.

 ...

Fixes: 66f5d6ce53e6 ("ipv6: replace rwlock with rcu and spinlock in fib6_table")
Signed-off-by: Wei Wang <redacted>
Acked-by: Eric Dumazet <edumazet@google.com>

Applied, thanks.