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Date:   Wed, 3 Apr 2019 13:54:55 +0200
From:   Florian Westphal <>
To:     syzbot <>
Subject: Re: BUG: using __this_cpu_read() in preemptible code in sk_mc_loop

syzbot <> wrote:
> syzbot found the following crash on:

> HEAD commit:    e1427237 macsec: add noinline tag to avoid a frame size wa..
> git tree:       net-next

> The bug was bisected to:
> commit 97cdcf37b57e3f204be3000b9eab9686f38b4356
> Author: Florian Westphal <>
> Date:   Mon Apr 1 14:42:13 2019 +0000
>     net: place xmit recursion in softnet data
> BUG: using __this_cpu_read() in preemptible [00000000] code:
> syz-executor284/7845
> caller is dev_recursion_level include/linux/netdevice.h:3052 [inline]

#syz dup: BUG: using __this_cpu_read() in preemptible code in ip6_finish_output

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