Subject: Re: [syzbot] WARNING in __nf_unregister_net_hook (4)

From: Pablo Neira Ayuso <[email-masked]>
Date: Thu, 13 May 2021 02:56:08 +0200

On Sat, May 08, 2021 at 04:46:57PM +0200, Florian Westphal wrote:
> Dmitry Vyukov <[email-masked]> wrote:
> > > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > > Reported-by: [email-masked]
> > 
> > Is this also fixed by "netfilter: arptables: use pernet ops struct
> > during unregister"?
> > The warning is the same, but the stack is different...
> 
> No, this is a different bug.
> 
> In both cases the caller attempts to unregister a hook that the core
> can't find, but in this case the caller is nftables, not arptables.

I see no reproducer for this bug. Maybe I broke the dormant flag handling?

Or maybe syzbot got here after the arptables bug has been hitted?