Another path has same issue, currently testing this.
From 92bf924c9eb7af1eade064583b9073baa03ec9f2 Mon Sep 17 00:00:00 2001
From: Stephen Hemminger
Date: Fri, 2 Feb 2018 13:10:11 -0800
Subject: [PATCH] igmp: fix unsafe RCU usage in igmpv3_src_addr
Running with lockdep
From: Eric Dumazet
Date: Thu, 01 Feb 2018 10:26:57 -0800
> From: Eric Dumazet
>
> Newly added igmpv3_get_srcaddr() needs to be called under rcu lock.
>
> Timer callbacks do not ensure this locking.
...
> Fixes: a46182b00290 ("net: igmp: Use