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Date:   Mon, 10 Jan 2022 12:48:50 +0100
From:   Florian Westphal <>
To:     syzbot <>
Subject: Re: [syzbot] WARNING: suspicious RCU usage in __dev_queue_xmit

syzbot <> wrote:
> Hello,
> syzbot found the following issue on:
> HEAD commit:    4c375272fb0b Merge branch 'net-add-preliminary-netdev-refc..
> git tree:       net-next
> console output:
> kernel config:
> dashboard link:
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:
> C reproducer:

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

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

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