netdev - WARNING: CPU: 0 PID: 0 at ./include/linux/netfilter.h:233 arp

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Date:   Fri, 5 Jan 2018 13:02:51 -0200
From:   Marco Franchi <marcofrk@...il.com>
To:     fugang.duan@....com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Fabio Estevam <festevam@...il.com>,
        Marco Franchi <marco.franchi@....com>
Subject: WARNING: CPU: 0 PID: 0 at ./include/linux/netfilter.h:233 arp_rcv

Hi,

I am getting the following warning on a imx6ul-evk board running
linux-next 20180105:

[    9.233290] ------------[ cut here ]------------
[    9.242068] WARNING: CPU: 0 PID: 0 at
./include/linux/netfilter.h:233 arp_rcv+0x1f8/0x228
[    9.250381] Modules linked in:
[    9.253633] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
4.15.0-rc6-next-20180104-dirty #2
[    9.261764] Hardware name: Freescale i.MX6 Ultralite (Device Tree)
[    9.268065] Backtrace:
[    9.270719] [<c010d188>] (dump_backtrace) from [<c010d448>]
(show_stack+0x18/0x1c)
[    9.278438]  r7:00000000 r6:60000153 r5:00000000 r4:c1079878
[    9.284258] [<c010d430>] (show_stack) from [<c0a32468>]
(dump_stack+0xb4/0xe8)
[    9.291641] [<c0a323b4>] (dump_stack) from [<c01260ac>] (__warn+0xf0/0x11c)
[    9.298763]  r9:d8053000 r8:000000e9 r7:00000009 r6:c0da3bdc
r5:00000000 r4:00000000
[    9.306662] [<c0125fbc>] (__warn) from [<c01261f0>]
(warn_slowpath_null+0x44/0x50)
[    9.314383]  r8:d8053000 r7:00000608 r6:c08873f8 r5:000000e9 r4:c0da3bdc
[    9.321243] [<c01261ac>] (warn_slowpath_null) from [<c08873f8>]
(arp_rcv+0x1f8/0x228)
[    9.329215]  r6:c0887200 r5:c107ac58 r4:d899b240
[    9.333999] [<c0887200>] (arp_rcv) from [<c07fe680>]
(__netif_receive_skb_core+0x878/0xbd4)
[    9.342491]  r6:c0887200 r5:c100ac8c r4:d899b240
[    9.347265] [<c07fde08>] (__netif_receive_skb_core) from
[<c0800fe0>] (__netif_receive_skb+0x2c/0x8c)
[    9.356643]  r10:00000080 r9:d8053000 r8:e0a26000 r7:c107ab0d
r6:c1008908 r5:d899b240
[    9.364598]  r4:c10099c4
[    9.367288] [<c0800fb4>] (__netif_receive_skb) from [<c0804c00>]
(netif_receive_skb_internal+0x7c/0x354)
[    9.376904]  r5:d899b240 r4:c10099c4
[    9.380635] [<c0804b84>] (netif_receive_skb_internal) from
[<c0805d5c>] (napi_gro_receive+0x88/0xa4)
[    9.389918]  r8:e0a26000 r7:00000001 r6:d899b240 r5:d899b240 r4:00000003
[    9.396784] [<c0805cd4>] (napi_gro_receive) from [<c064609c>]
(fec_enet_rx_napi+0x3a8/0x9b8)
[    9.405357]  r5:d8054000 r4:00000000
[    9.409093] [<c0645cf4>] (fec_enet_rx_napi) from [<c080552c>]
(net_rx_action+0x220/0x334)
[    9.417431]  r10:dbbdfa00 r9:c1001d94 r8:00000040 r7:0000012c
r6:ffff8e6b r5:00000001
[    9.425384]  r4:d8053710
[    9.428075] [<c080530c>] (net_rx_action) from [<c01022d0>]
(__do_softirq+0x128/0x2a0)
[    9.436063]  r10:40000003 r9:c1003080 r8:00000100 r7:c100308c
r6:c1000000 r5:00000003
[    9.444018]  r4:00000000
[    9.446708] [<c01021a8>] (__do_softirq) from [<c012c16c>]
(irq_exit+0x14c/0x1a8)
[    9.454262]  r10:e080a000 r9:d8004400 r8:00000001 r7:00000000
r6:c1008a98 r5:00000000
[    9.462218]  r4:ffffe000
[    9.464911] [<c012c020>] (irq_exit) from [<c0180464>]
(__handle_domain_irq+0x74/0xe8)
[    9.472879]  r5:00000000 r4:c0f7cc24
[    9.476614] [<c01803f0>] (__handle_domain_irq) from [<c0467ebc>]
(gic_handle_irq+0x64/0xc4)
[    9.485121]  r9:c1028344 r8:c1001e98 r7:00000000 r6:000003ff
r5:000003eb r4:e080a00c
[    9.493016] [<c0467e58>] (gic_handle_irq) from [<c01019f0>]
(__irq_svc+0x70/0x98)
[    9.500632] Exception stack(0xc1001e98 to 0xc1001ee0)
[    9.505822] 1e80:
    00000001 00000001
[    9.514157] 1ea0: 00000000 c100bf80 25963796 00000002 00000002
dbbde5c8 26545294 00000002
[    9.522491] 1ec0: 00000000 c1001f14 c1001eb8 c1001ee8 c01724fc
c0724464 20000153 ffffffff
[    9.530824]  r10:00000000 r9:c1000000 r8:26545294 r7:c1001ecc
r6:ffffffff r5:20000153
[    9.538778]  r4:c0724464
[    9.541470] [<c07242f4>] (cpuidle_enter_state) from [<c0724630>]
(cpuidle_enter+0x1c/0x20)
[    9.549893]  r10:c100f6a8 r9:dbbde5c8 r8:c0f7c5c0 r7:c1008978
r6:00000001 r5:c100892c
[    9.557857]  r4:c1000000 r3:dbbde5c8
[    9.561589] [<c0724614>] (cpuidle_enter) from [<c0169dd4>]
(call_cpuidle+0x28/0x44)
[    9.569399] [<c0169dac>] (call_cpuidle) from [<c016a0bc>]
(do_idle+0x1bc/0x230)
[    9.576861] [<c0169f00>] (do_idle) from [<c016a4e0>]
(cpu_startup_entry+0x20/0x24)
[    9.584587]  r10:c0f63a50 r9:c1008908 r8:c107b480 r7:c1008900
r6:c107b480 r5:00000002
[    9.592546]  r4:000000c4 r3:c0f75354
[    9.596283] [<c016a4c0>] (cpu_startup_entry) from [<c0a47720>]
(rest_init+0x210/0x25c)
[    9.604372] [<c0a47510>] (rest_init) from [<c0f00d60>]
(start_kernel+0x390/0x418)
[    9.611998]  r5:ffffffff r4:c107b4cc
[    9.615723] [<c0f009d0>] (start_kernel) from [<00000000>] (  (null))
[    9.622235]  r10:10c5387d r9:410fc075 r8:83000000 r7:00000000
r6:10c0387d r5:00000051
[    9.630191]  r4:c0f0032c
[    9.632851] ---[ end trace 2d5d5f79c0c8da59 ]---

Does anyone know how to fix it?

Thanks