Re: [syzbot] [netfilter?] WARNING in nf_conntrack_cleanup_net_list

[Florian Westphal]

Eric Dumazet <edumazet@xxxxxxxxxx> wrote:
> > > I looked around last night but couldn't find an skb stuck anywhere.
> > > The nf_conntrack_net->count was == 1
> >
> > Its caused skb skb fraglist skbs that still hold nf_conn references
> > on the softnet data defer lists.
> >
> > setting net.core.skb_defer_max=0 makes the hang disappear for me.
> 
> What kind of packets ? TCP ones ?

UDP, but I can't say yet if thats an udp specific issue or not.
(the packets are generated via ip_defrag.c).