From: Dmitry Vyukov <dvyukov@google.com>
To: Florian Westphal <fw@strlen.de>
Cc: syzbot <syzbot+68a8ed58e3d17c700de5@syzkaller.appspotmail.com>,
coreteam@netfilter.org, David Miller <davem@davemloft.net>,
Hillf Danton <hdanton@sina.com>, Jiri Benc <jbenc@redhat.com>,
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>,
LKML <linux-kernel@vger.kernel.org>,
moshe@mellanox.com, netdev <netdev@vger.kernel.org>,
NetFilter <netfilter-devel@vger.kernel.org>,
Pablo Neira Ayuso <pablo@netfilter.org>,
Sabrina Dubroca <sd@queasysnail.net>,
syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: WARNING in geneve_exit_batch_net (2)
Date: Fri, 13 Mar 2020 08:30:58 +0100 [thread overview]
Message-ID: <CACT4Y+aPA8byGU=rt5P9tt3wWHL8Wr3t_uiXZ5fJBzAtcc=+AA@mail.gmail.com> (raw)
In-Reply-To: <20200313014435.GY979@breakpoint.cc>
On Fri, Mar 13, 2020 at 2:45 AM Florian Westphal <fw@strlen.de> wrote:
>
> syzbot <syzbot+68a8ed58e3d17c700de5@syzkaller.appspotmail.com> wrote:
> > syzbot has bisected this bug to:
> >
> > commit 4e645b47c4f000a503b9c90163ad905786b9bc1d
> > Author: Florian Westphal <fw@strlen.de>
> > Date: Thu Nov 30 23:21:02 2017 +0000
> >
> > netfilter: core: make nf_unregister_net_hooks simple wrapper again
>
> No idea why this turns up, the reproducer doesn't hit any of these code
> paths.
The attached bisection log usually makes this reasonably transparent.
It seems that in this case another kernel bug gets in the way of bisection.
> The debug splat is a false-positive; ndo_stop/list_del hasn't run yet.
> I will send a fix for net tree.
>
> --
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next prev parent reply other threads:[~2020-03-13 7:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-29 9:01 WARNING in geneve_exit_batch_net (2) syzbot
2020-03-12 7:12 ` syzbot
2020-03-13 1:44 ` Florian Westphal
2020-03-13 7:30 ` Dmitry Vyukov [this message]
2020-03-14 7:18 ` [PATCH net] geneve: move debug check after netdev unregister Florian Westphal
2020-03-15 7:43 ` David Miller
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