From: Dmitry Vyukov <dvyukov@google.com>
To: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Florian Westphal <fw@strlen.de>,
syzbot <syzbot+154bd5be532a63aa778b@syzkaller.appspotmail.com>,
coreteam@netfilter.org, David Miller <davem@davemloft.net>,
Jozsef Kadlecsik <kadlec@netfilter.org>,
Jakub Kicinski <kuba@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
netdev <netdev@vger.kernel.org>,
NetFilter <netfilter-devel@vger.kernel.org>,
syzkaller-bugs <syzkaller-bugs@googlegroups.com>
Subject: Re: [syzbot] WARNING in __nf_unregister_net_hook (4)
Date: Thu, 13 May 2021 09:08:20 +0200 [thread overview]
Message-ID: <CACT4Y+YhQQtHBErLYRDqHyw16Bxu9FCMQymviMBR-ywiKf3VQw@mail.gmail.com> (raw)
In-Reply-To: <20210513005608.GA23780@salvia>
On Thu, May 13, 2021 at 2:56 AM Pablo Neira Ayuso <pablo@netfilter.org> wrote:
>
> On Sat, May 08, 2021 at 04:46:57PM +0200, Florian Westphal wrote:
> > Dmitry Vyukov <dvyukov@google.com> wrote:
> > > > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > > > Reported-by: syzbot+154bd5be532a63aa778b@syzkaller.appspotmail.com
> > >
> > > 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?
syzbot always stops after the first bug to give you perfect "Not
tainted" oopses.
next prev parent reply other threads:[~2021-05-13 7:08 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-10 14:49 [syzbot] WARNING in __nf_unregister_net_hook (4) syzbot
2021-05-08 5:07 ` Dmitry Vyukov
2021-05-08 14:46 ` Florian Westphal
2021-05-13 0:56 ` Pablo Neira Ayuso
2021-05-13 7:08 ` Dmitry Vyukov [this message]
2021-05-17 10:57 ` Pablo Neira Ayuso
2021-05-17 12:42 ` Dmitry Vyukov
2021-05-17 14:10 ` Pablo Neira Ayuso
2021-09-30 17:27 ` syzbot
2021-10-06 14:20 ` [PATCH nf] netfilter: nftables: skip netdev events generated on netns removal Florian Westphal
2021-10-07 17:40 ` Pablo Neira Ayuso
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