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From: Florian Westphal <fw@strlen.de>
To: syzbot <syzbot+e163f2ff7c3f7efd8203@syzkaller.appspotmail.com>
Cc: a@unstable.cc, alobakin@pm.me, andrii@kernel.org, ast@kernel.org,
	atenart@kernel.org, b.a.t.m.a.n@lists.open-mesh.org,
	bpf@vger.kernel.org, coreteam@netfilter.org,
	daniel@iogearbox.net, davem@davemloft.net, fw@strlen.de,
	john.fastabend@gmail.com, jonathan.lemon@gmail.com,
	kadlec@netfilter.org, kafai@fb.com, kpsingh@kernel.org,
	kuba@kernel.org, linux-kernel@vger.kernel.org, lukas@wunner.de,
	mareklindner@neomailbox.ch, netdev@vger.kernel.org,
	netfilter-devel@vger.kernel.org, pablo@netfilter.org,
	songliubraving@fb.com, sven@narfation.org, sw@simonwunderlich.de,
	syzkaller-bugs@googlegroups.com, yhs@fb.com
Subject: Re: [syzbot] WARNING: suspicious RCU usage in __dev_queue_xmit
Date: Mon, 10 Jan 2022 12:48:50 +0100	[thread overview]
Message-ID: <20220110114850.GD317@breakpoint.cc> (raw)
In-Reply-To: <000000000000ca1d2005d537ebac@google.com>

syzbot <syzbot+e163f2ff7c3f7efd8203@syzkaller.appspotmail.com> wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    4c375272fb0b Merge branch 'net-add-preliminary-netdev-refc..
> git tree:       net-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=164749a9b00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=2b8e24e3a80e3875
> dashboard link: https://syzkaller.appspot.com/bug?extid=e163f2ff7c3f7efd8203
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11493641b00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11ac6aceb00000

> include/linux/netfilter_netdev.h:97 suspicious rcu_dereference_check() usage!

#syz fix: netfilter: egress: avoid a lockdep splat

      reply	other threads:[~2022-01-10 11:50 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-10 10:37 syzbot
2022-01-10 11:48 ` Florian Westphal [this message]

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